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b2cbe8d8 | 1 | Guile NEWS --- history of user-visible changes. |
b3da54d1 | 2 | Copyright (C) 1996-2012 Free Software Foundation, Inc. |
5c54da76 JB |
3 | See the end for copying conditions. |
4 | ||
1e457544 | 5 | Please send Guile bug reports to bug-guile@gnu.org. |
5ebbe4ef | 6 | |
66ad445d | 7 | |
f43622a2 AW |
8 | Changes in 2.0.4 (since 2.0.3): |
9 | ||
f41ef416 | 10 | * Notable changes |
f43622a2 | 11 | |
f41ef416 | 12 | ** Better debuggability for interpreted procedures. |
f43622a2 AW |
13 | |
14 | Guile 2.0 came with a great debugging experience for compiled | |
15 | procedures, but the story for interpreted procedures was terrible. Now, | |
486bd70d AW |
16 | at least, interpreted procedures have names, and the `arity' procedure |
17 | property is always correct (or, as correct as it can be, in the presence | |
18 | of `case-lambda'). | |
f43622a2 AW |
19 | |
20 | ** Support for cross-compilation. | |
21 | ||
22 | One can now use a native Guile to cross-compile `.go' files for a | |
23 | different architecture. See the documentation for `--target' in the | |
486bd70d AW |
24 | "Compilation" section of the manual, for information on how to use the |
25 | cross-compiler. See the "Cross building Guile" section of the README, | |
26 | for more on how to cross-compile Guile itself. | |
f43622a2 | 27 | |
d4b5c773 AW |
28 | ** The return of `local-eval'. |
29 | ||
30 | Back by popular demand, `the-environment' and `local-eval' allow the | |
31 | user to capture a lexical environment, and then evaluate arbitrary | |
32 | expressions in that context. There is also a new `local-compile' | |
33 | command. See "Local Evaluation" in the manual, for more. Special | |
34 | thanks to Mark Weaver for an initial implementation of this feature. | |
35 | ||
f43622a2 AW |
36 | ** Fluids can now have default values. |
37 | ||
38 | Fluids are used for dynamic and thread-local binding. They have always | |
39 | inherited their values from the context or thread that created them. | |
40 | However, there was a case in which a new thread would enter Guile, and | |
41 | the default values of all the fluids would be `#f' for that thread. | |
42 | ||
43 | This has now been fixed so that `make-fluid' has an optional default | |
486bd70d | 44 | value for fluids in unrelated dynamic roots, which defaults to `#f'. |
f43622a2 AW |
45 | |
46 | ** Garbage collector tuning. | |
47 | ||
48 | The garbage collector has now been tuned to run more often under some | |
49 | circumstances. | |
50 | ||
51 | *** Unmanaged allocation | |
52 | ||
53 | The new `scm_gc_register_allocation' function will notify the collector | |
54 | of unmanaged allocation. This will cause the collector to run sooner. | |
55 | Guile's `scm_malloc', `scm_calloc', and `scm_realloc' unmanaged | |
56 | allocators eventually call this function. This leads to better | |
57 | performance under steady-state unmanaged allocation. | |
58 | ||
59 | *** Transient allocation | |
60 | ||
61 | When the collector runs, it will try to record the total memory | |
62 | footprint of a process, if the platform supports this information. If | |
63 | the memory footprint is growing, the collector will run more frequently. | |
64 | This reduces the increase of the resident size of a process in response | |
65 | to a transient increase in allocation. | |
66 | ||
67 | *** Management of threads, bignums | |
68 | ||
69 | Creating a thread will allocate a fair amount of memory. Guile now does | |
70 | some GC work (using `GC_collect_a_little') when allocating a thread. | |
71 | This leads to a better memory footprint when creating many short-lived | |
72 | threads. | |
73 | ||
74 | Similarly, bignums can occupy a lot of memory. Guile now offers hooks | |
75 | to enable custom GMP allocators that end up calling | |
486bd70d | 76 | `scm_gc_register_allocation'. These allocators are enabled by default |
f43622a2 AW |
77 | when running Guile from the command-line. To enable them in libraries, |
78 | set the `scm_install_gmp_memory_functions' variable to a nonzero value | |
79 | before loading Guile. | |
80 | ||
f43622a2 AW |
81 | ** SRFI-39 parameters are available by default. |
82 | ||
f41ef416 AW |
83 | Guile now includes support for parameters, as defined by SRFI-39, in the |
84 | default environment. See "Parameters" in the manual, for more | |
85 | information. `current-input-port', `current-output-port', and | |
86 | `current-error-port' are now parameters. | |
f43622a2 | 87 | |
d4b5c773 | 88 | ** Add `current-warning-port'. |
f43622a2 | 89 | |
f41ef416 AW |
90 | Guile now outputs warnings on a separate port, `current-warning-port', |
91 | initialized to the value that `current-error-port' has on startup. | |
f43622a2 | 92 | |
f41ef416 | 93 | ** Syntax parameters. |
f43622a2 | 94 | |
f41ef416 AW |
95 | Following Racket's lead, Guile now supports syntax parameters. See |
96 | "Syntax parameters" in the manual, for more. | |
f43622a2 | 97 | |
f41ef416 AW |
98 | Also see Barzilay, Culpepper, and Flatt's 2011 SFP workshop paper, |
99 | "Keeping it Clean with syntax-parameterize". | |
f43622a2 | 100 | |
f41ef416 | 101 | ** Parse command-line arguments from the locale encoding. |
f43622a2 | 102 | |
f41ef416 AW |
103 | Guile now attempts to parse command-line arguments using the user's |
104 | locale. However for backwards compatibility with other 2.0.x releases, | |
105 | it does so without actually calling `setlocale'. Please report any bugs | |
106 | in this facility to bug-guile@gnu.org. | |
f43622a2 | 107 | |
d4b5c773 AW |
108 | ** One-armed conditionals: `when' and `unless' |
109 | ||
110 | Guile finally has `when' and `unless' in the default environment. Use | |
111 | them whenever you would use an `if' with only one branch. See | |
112 | "Conditionals" in the manual, for more. | |
113 | ||
114 | ** `current-filename', `add-to-load-path' | |
115 | ||
116 | There is a new form, `(current-filename)', which expands out to the | |
117 | source file in which it occurs. Combined with the new | |
118 | `add-to-load-path', this allows simple scripts to easily add nearby | |
119 | directories to the load path. See "Load Paths" in the manual, for more. | |
120 | ||
121 | ** `random-state-from-platform' | |
122 | ||
123 | This procedure initializes a random seed using good random sources | |
124 | available on your platform, such as /dev/urandom. See "Random Number | |
125 | Generation" in the manual, for more. | |
126 | ||
f41ef416 AW |
127 | * New interfaces |
128 | ||
129 | ** (ice-9 session): `apropos-hook' | |
130 | ** New print option: `escape-newlines', defaults to #t. | |
131 | ** (ice-9 ftw): `file-system-fold', `file-system-tree', `scandir' | |
d4b5c773 AW |
132 | ** `scm_c_value_ref': access to multiple returned values from C |
133 | ** Some new syntax helpers in (system syntax) | |
134 | ||
135 | Search the manual for these identifiers and modules, for more. | |
136 | ||
137 | * Build fixes | |
138 | ||
139 | ** FreeBSD build fixes. | |
140 | ** OpenBSD compilation fixes. | |
141 | ** Solaris 2.10 test suite fixes. | |
142 | ** IA64 compilation fix. | |
143 | ** MinGW build fixes. | |
144 | ** Work around instruction reordering on SPARC and HPPA in the VM. | |
145 | ** Gnulib updates: added `dirfd', `setenv' modules. | |
f43622a2 | 146 | |
f43622a2 AW |
147 | * Bug fixes |
148 | ||
d4b5c773 AW |
149 | ** Add a deprecated alias for $expt. |
150 | ** Add an exception printer for `getaddrinfo-error'. | |
151 | ** Add deprecated shim for `scm_display_error' with stack as first argument. | |
152 | ** Add warnings for unsupported `simple-format' options. | |
153 | ** Allow overlapping regions to be passed to `bytevector-copy!'. | |
154 | ** Avoid calling `u32_conv_from_encoding' on the null string. | |
155 | ** Better function prologue disassembly | |
156 | ** Compiler: fix miscompilation of (values foo ...) in some contexts. | |
157 | ** Compiler: fix serialization of #nil-terminated lists. | |
158 | ** Compiler: allow values bound in non-tail let expressions to be collected. | |
159 | ** Deprecate SCM_ASRTGO. | |
160 | ** Document invalidity of (begin) as expression; add back-compat shim. | |
161 | ** Don't leak file descriptors when mmaping objcode. | |
162 | ** Empty substrings no longer reference the original stringbuf. | |
163 | ** FFI: Fix `set-pointer-finalizer!' to leave the type cell unchanged. | |
164 | ** FFI: Fix signed/unsigned pointer mismatches in implementation. | |
f43622a2 | 165 | ** FFI: Hold a weak reference to the CIF made by `procedure->pointer'. |
f41ef416 AW |
166 | ** FFI: Hold a weak reference to the procedure passed to `procedure->pointer'. |
167 | ** FFI: Properly unpack small integer return values in closure call. | |
d4b5c773 | 168 | ** Fix R6RS `fold-left' so the accumulator is the first argument. |
f43622a2 | 169 | ** Fix `validate-target' in (system base target). |
d4b5c773 AW |
170 | ** Fix bit-set*! bug from 2005. |
171 | ** Fix bug in `make-repl' when `lang' is actually a <language>. | |
172 | ** Fix bugs related to mutation, the null string, and shared substrings. | |
173 | ** Fix <dynwind> serialization. | |
174 | ** Fix erroneous check in `set-procedure-properties!'. | |
175 | ** Fix generalized-vector-{ref,set!} for slices. | |
40e92f09 | 176 | ** Fix error messages involving definition forms. |
f41ef416 | 177 | ** HTTP: Extend handling of "Cache-Control" header. |
f43622a2 | 178 | ** HTTP: Fix qstring writing of cache-extension values |
d4b5c773 | 179 | ** HTTP: Fix validators for various list-style headers. |
f41ef416 | 180 | ** HTTP: Permit non-date values for Expires header. |
d4b5c773 AW |
181 | ** HTTP: `write-request-line' writes absolute paths, not absolute URIs. |
182 | ** Hack the port-column of current-output-port after printing a prompt. | |
f41ef416 | 183 | ** Have `cpu-word-size' error out on unknown CPUs; add support for MIPSEL. |
d4b5c773 AW |
184 | ** Make sure `regexp-quote' tests use Unicode-capable string ports. |
185 | ** Peval: Fix bugs in the new optimizer. | |
186 | ** Peval: fold (values FOO) to FOO in more cases | |
187 | ** Statistically unique marks and labels, for robust hygiene across sessions. | |
188 | ** Web: Allow URIs with empty authorities, like "file:///etc/hosts". | |
189 | ** `,language' at REPL sets the current-language fluid. | |
190 | ** `primitive-load' returns the value(s) of the last expression. | |
f41ef416 | 191 | ** `scm_from_stringn' always returns unique strings. |
f41ef416 | 192 | ** `scm_i_substring_copy' tries to narrow the substring. |
d4b5c773 AW |
193 | ** guile-readline: Clean `.go' files. |
194 | ** i18n: Fix gc_malloc/free mismatch on non-GNU systems. | |
f43622a2 | 195 | |
02f91898 AW |
196 | Changes in 2.0.3 (since 2.0.2): |
197 | ||
198 | * Speed improvements | |
199 | ||
200 | ** Guile has a new optimizer, `peval'. | |
201 | ||
202 | `Peval' is a partial evaluator that performs constant folding, dead code | |
203 | elimination, copy propagation, and inlining. By default it runs on | |
204 | every piece of code that Guile compiles, to fold computations that can | |
205 | happen at compile-time, so they don't have to happen at runtime. | |
206 | ||
207 | If we did our job right, the only impact you would see would be your | |
208 | programs getting faster. But if you notice slowdowns or bloated code, | |
209 | please send a mail to bug-guile@gnu.org with details. | |
210 | ||
211 | Thanks to William R. Cook, Oscar Waddell, and Kent Dybvig for inspiring | |
212 | peval and its implementation. | |
213 | ||
214 | You can see what peval does on a given piece of code by running the new | |
215 | `,optimize' REPL meta-command, and comparing it to the output of | |
216 | `,expand'. See "Compile Commands" in the manual, for more. | |
217 | ||
218 | ** Fewer calls to `stat'. | |
219 | ||
220 | Guile now stats only the .go file and the .scm file when loading a fresh | |
221 | compiled file. | |
222 | ||
223 | * Notable changes | |
224 | ||
225 | ** New module: `(web client)', a simple synchronous web client. | |
226 | ||
227 | See "Web Client" in the manual, for more. | |
228 | ||
229 | ** Users can now install compiled `.go' files. | |
230 | ||
231 | See "Installing Site Packages" in the manual. | |
232 | ||
233 | ** Remove Front-Cover and Back-Cover text from the manual. | |
234 | ||
235 | The manual is still under the GNU Free Documentation License, but no | |
236 | longer has any invariant sections. | |
237 | ||
238 | ** More helpful `guild help'. | |
239 | ||
240 | `guild' is Guile's multi-tool, for use in shell scripting. Now it has a | |
241 | nicer interface for querying the set of existing commands, and getting | |
242 | help on those commands. Try it out and see! | |
243 | ||
244 | ** New macro: `define-syntax-rule' | |
245 | ||
246 | `define-syntax-rule' is a shorthand to make a `syntax-rules' macro with | |
247 | one clause. See "Syntax Rules" in the manual, for more. | |
248 | ||
249 | ** The `,time' REPL meta-command now has more precision. | |
250 | ||
251 | The output of this command now has microsecond precision, instead of | |
252 | 10-millisecond precision. | |
253 | ||
254 | ** `(ice-9 match)' can now match records. | |
255 | ||
256 | See "Pattern Matching" in the manual, for more on matching records. | |
257 | ||
258 | ** New module: `(language tree-il debug)'. | |
259 | ||
260 | This module provides a tree-il verifier. This is useful for people that | |
261 | generate tree-il, usually as part of a language compiler. | |
262 | ||
263 | ** New functions: `scm_is_exact', `scm_is_inexact'. | |
264 | ||
265 | These provide a nice C interface for Scheme's `exact?' and `inexact?', | |
266 | respectively. | |
267 | ||
268 | * Bugs fixed | |
269 | ||
270 | See the git log (or the ChangeLog) for more details on these bugs. | |
271 | ||
272 | ** Fix order of importing modules and resolving duplicates handlers. | |
273 | ** Fix a number of bugs involving extended (merged) generics. | |
274 | ** Fix invocation of merge-generics duplicate handler. | |
275 | ** Fix write beyond array end in arrays.c. | |
276 | ** Fix read beyond end of hashtable size array in hashtab.c. | |
277 | ** (web http): Locale-independent parsing and serialization of dates. | |
278 | ** Ensure presence of Host header in HTTP/1.1 requests. | |
279 | ** Fix take-right and drop-right for improper lists. | |
280 | ** Fix leak in get_current_locale(). | |
281 | ** Fix recursive define-inlinable expansions. | |
282 | ** Check that srfi-1 procedure arguments are procedures. | |
283 | ** Fix r6rs `map' for multiple returns. | |
284 | ** Fix scm_tmpfile leak on POSIX platforms. | |
285 | ** Fix a couple of leaks (objcode->bytecode, make-boot-program). | |
286 | ** Fix guile-lib back-compatibility for module-stexi-documentation. | |
287 | ** Fix --listen option to allow other ports. | |
288 | ** Fix scm_to_latin1_stringn for substrings. | |
289 | ** Fix compilation of untyped arrays of rank not 1. | |
290 | ** Fix unparse-tree-il of <dynset>. | |
291 | ** Fix reading of #||||#. | |
2be3feb1 LC |
292 | ** Fix segfault in GOOPS when class fields are redefined. |
293 | ** Prefer poll(2) over select(2) to allow file descriptors above FD_SETSIZE. | |
02f91898 AW |
294 | |
295 | \f | |
e4a2807e AW |
296 | Changes in 2.0.2 (since 2.0.1): |
297 | ||
298 | * Notable changes | |
299 | ||
2dd49486 AW |
300 | ** `guile-tools' renamed to `guild' |
301 | ||
302 | The new name is shorter. Its intended future use is for a CPAN-like | |
303 | system for Guile wizards and journeyfolk to band together to share code; | |
304 | hence the name. `guile-tools' is provided as a backward-compatible | |
305 | symbolic link. See "Using Guile Tools" in the manual, for more. | |
306 | ||
e4a2807e AW |
307 | ** New control operators: `shift' and `reset' |
308 | ||
309 | See "Shift and Reset" in the manual, for more information. | |
310 | ||
311 | ** `while' as an expression | |
312 | ||
313 | Previously the return value of `while' was unspecified. Now its | |
314 | values are specified both in the case of normal termination, and via | |
315 | termination by invoking `break', possibly with arguments. See "while | |
316 | do" in the manual for more. | |
317 | ||
318 | ** Disallow access to handles of weak hash tables | |
319 | ||
320 | `hash-get-handle' and `hash-create-handle!' are no longer permitted to | |
321 | be called on weak hash tables, because the fields in a weak handle could | |
322 | be nulled out by the garbage collector at any time, but yet they are | |
323 | otherwise indistinguishable from pairs. Use `hash-ref' and `hash-set!' | |
324 | instead. | |
325 | ||
326 | ** More precision for `get-internal-run-time', `get-internal-real-time' | |
327 | ||
328 | On 64-bit systems which support POSIX clocks, Guile's internal timing | |
329 | procedures offer nanosecond resolution instead of the 10-millisecond | |
330 | resolution previously available. 32-bit systems now use 1-millisecond | |
331 | timers. | |
332 | ||
333 | ** Guile now measures time spent in GC | |
334 | ||
335 | `gc-stats' now returns a meaningful value for `gc-time-taken'. | |
336 | ||
337 | ** Add `gcprof' | |
338 | ||
339 | The statprof profiler now exports a `gcprof' procedure, driven by the | |
340 | `after-gc-hook', to see which parts of your program are causing GC. Let | |
341 | us know if you find it useful. | |
342 | ||
343 | ** `map', `for-each' and some others now implemented in Scheme | |
344 | ||
345 | We would not mention this in NEWS, as it is not a user-visible change, | |
346 | if it were not for one thing: `map' and `for-each' are no longer | |
347 | primitive generics. Instead they are normal bindings, which can be | |
348 | wrapped by normal generics. This fixes some modularity issues between | |
349 | core `map', SRFI-1 `map', and GOOPS. | |
350 | ||
351 | Also it's pretty cool that we can do this without a performance impact. | |
352 | ||
353 | ** Add `scm_peek_byte_or_eof'. | |
354 | ||
355 | This helper is like `scm_peek_char_or_eof', but for bytes instead of | |
356 | full characters. | |
357 | ||
358 | ** Implement #:stop-at-first-non-option option for getopt-long | |
359 | ||
360 | See "getopt-long Reference" in the manual, for more information. | |
361 | ||
362 | ** Improve R6RS conformance for conditions in the I/O libraries | |
363 | ||
364 | The `(rnrs io simple)' module now raises the correct R6RS conditions in | |
365 | error cases. `(rnrs io ports)' is also more correct now, though it is | |
366 | still a work in progress. | |
367 | ||
368 | ** All deprecated routines emit warnings | |
369 | ||
370 | A few deprecated routines were lacking deprecation warnings. This has | |
371 | been fixed now. | |
372 | ||
373 | * Speed improvements | |
374 | ||
375 | ** Constants in compiled code now share state better | |
376 | ||
377 | Constants with shared state, like `("foo")' and `"foo"', now share state | |
378 | as much as possible, in the entire compilation unit. This cuts compiled | |
379 | `.go' file sizes in half, generally, and speeds startup. | |
380 | ||
381 | ** VLists: optimize `vlist-fold-right', and add `vhash-fold-right' | |
382 | ||
383 | These procedures are now twice as fast as they were. | |
384 | ||
385 | ** UTF-8 ports to bypass `iconv' entirely | |
386 | ||
387 | This reduces memory usage in a very common case. | |
388 | ||
389 | ** Compiler speedups | |
390 | ||
391 | The compiler is now about 40% faster. (Note that this is only the case | |
392 | once the compiler is itself compiled, so the build still takes as long | |
393 | as it did before.) | |
394 | ||
395 | ** VM speed tuning | |
396 | ||
397 | Some assertions that were mostly useful for sanity-checks on the | |
398 | bytecode compiler are now off for both "regular" and "debug" engines. | |
399 | This together with a fix to cache a TLS access and some other tweaks | |
400 | improve the VM's performance by about 20%. | |
401 | ||
402 | ** SRFI-1 list-set optimizations | |
403 | ||
404 | lset-adjoin and lset-union now have fast paths for eq? sets. | |
405 | ||
406 | ** `memq', `memv' optimizations | |
407 | ||
408 | These procedures are now at least twice as fast than in 2.0.1. | |
409 | ||
410 | * Deprecations | |
411 | ||
412 | ** Deprecate scm_whash API | |
413 | ||
414 | `scm_whash_get_handle', `SCM_WHASHFOUNDP', `SCM_WHASHREF', | |
415 | `SCM_WHASHSET', `scm_whash_create_handle', `scm_whash_lookup', and | |
416 | `scm_whash_insert' are now deprecated. Use the normal hash table API | |
417 | instead. | |
418 | ||
419 | ** Deprecate scm_struct_table | |
420 | ||
421 | `SCM_STRUCT_TABLE_NAME', `SCM_SET_STRUCT_TABLE_NAME', | |
422 | `SCM_STRUCT_TABLE_CLASS', `SCM_SET_STRUCT_TABLE_CLASS', | |
423 | `scm_struct_table', and `scm_struct_create_handle' are now deprecated. | |
424 | These routines formed part of the internals of the map between structs | |
425 | and classes. | |
426 | ||
427 | ** Deprecate scm_internal_dynamic_wind | |
428 | ||
429 | The `scm_t_inner' type and `scm_internal_dynamic_wind' are deprecated, | |
430 | as the `scm_dynwind' API is better, and this API encourages users to | |
431 | stuff SCM values into pointers. | |
432 | ||
433 | ** Deprecate scm_immutable_cell, scm_immutable_double_cell | |
434 | ||
435 | These routines are deprecated, as the GC_STUBBORN API doesn't do | |
436 | anything any more. | |
437 | ||
438 | * Manual updates | |
439 | ||
440 | Andreas Rottman kindly transcribed the missing parts of the `(rnrs io | |
441 | ports)' documentation from the R6RS documentation. Thanks Andreas! | |
442 | ||
443 | * Bugs fixed | |
444 | ||
445 | ** Fix double-loading of script in -ds case | |
446 | ** -x error message fix | |
447 | ** iconveh-related cross-compilation fixes | |
448 | ** Fix small integer return value packing on big endian machines. | |
449 | ** Fix hash-set! in weak-value table from non-immediate to immediate | |
450 | ** Fix call-with-input-file & relatives for multiple values | |
451 | ** Fix `hash' for inf and nan | |
452 | ** Fix libguile internal type errors caught by typing-strictness==2 | |
f39779b1 LC |
453 | ** Fix compile error in MinGW fstat socket detection |
454 | ** Fix generation of auto-compiled file names on MinGW | |
e4a2807e AW |
455 | ** Fix multithreaded access to internal hash tables |
456 | ** Emit a 1-based line number in error messages | |
457 | ** Fix define-module ordering | |
7505c6e0 | 458 | ** Fix several POSIX functions to use the locale encoding |
f39779b1 LC |
459 | ** Add type and range checks to the complex generalized vector accessors |
460 | ** Fix unaligned accesses for bytevectors of complex numbers | |
461 | ** Fix '(a #{.} b) | |
462 | ** Fix erroneous VM stack overflow for canceled threads | |
e4a2807e AW |
463 | |
464 | \f | |
882c8963 MW |
465 | Changes in 2.0.1 (since 2.0.0): |
466 | ||
7c81eba2 | 467 | * Notable changes |
9d6a151f | 468 | |
7c81eba2 | 469 | ** guile.m4 supports linking with rpath |
9d6a151f | 470 | |
7c81eba2 AW |
471 | The GUILE_FLAGS macro now sets GUILE_LIBS and GUILE_LTLIBS, which |
472 | include appropriate directives to the linker to include libguile-2.0.so | |
473 | in the runtime library lookup path. | |
9d6a151f | 474 | |
7c81eba2 | 475 | ** `begin' expands macros in its body before other expressions |
9d6a151f | 476 | |
7c81eba2 | 477 | This enables support for programs like the following: |
9d6a151f | 478 | |
7c81eba2 AW |
479 | (begin |
480 | (define even? | |
481 | (lambda (x) | |
482 | (or (= x 0) (odd? (- x 1))))) | |
483 | (define-syntax odd? | |
484 | (syntax-rules () | |
485 | ((odd? x) (not (even? x))))) | |
486 | (even? 10)) | |
9d6a151f | 487 | |
7c81eba2 | 488 | ** REPL reader usability enhancements |
9d6a151f | 489 | |
7c81eba2 AW |
490 | The REPL now flushes input after a read error, which should prevent one |
491 | error from causing other errors. The REPL also now interprets comments | |
492 | as whitespace. | |
9d6a151f | 493 | |
7c81eba2 | 494 | ** REPL output has configurable width |
9d6a151f | 495 | |
7c81eba2 AW |
496 | The REPL now defaults to output with the current terminal's width, in |
497 | columns. See "Debug Commands" in the manual for more information on | |
498 | the ,width command. | |
9d6a151f | 499 | |
7c81eba2 | 500 | ** Better C access to the module system |
9d6a151f | 501 | |
7c81eba2 AW |
502 | Guile now has convenient C accessors to look up variables or values in |
503 | modules and their public interfaces. See `scm_c_public_ref' and friends | |
504 | in "Accessing Modules from C" in the manual. | |
9d6a151f | 505 | |
7c81eba2 | 506 | ** Added `scm_call_5', `scm_call_6' |
9d6a151f | 507 | |
7c81eba2 | 508 | See "Fly Evaluation" in the manual. |
9d6a151f | 509 | |
7c81eba2 | 510 | ** Added `scm_from_latin1_keyword', `scm_from_utf8_keyword' |
9d6a151f | 511 | |
7c81eba2 AW |
512 | See "Keyword Procedures" in the manual, for more. Note that |
513 | `scm_from_locale_keyword' should not be used when the name is a C string | |
514 | constant. | |
9d6a151f | 515 | |
7c81eba2 | 516 | ** R6RS unicode and string I/O work |
9d6a151f | 517 | |
7c81eba2 AW |
518 | Added efficient implementations of `get-string-n' and `get-string-n!' |
519 | for binary ports. Exported `current-input-port', `current-output-port' | |
520 | and `current-error-port' from `(rnrs io ports)', and enhanced support | |
521 | for transcoders. | |
9d6a151f | 522 | |
7c81eba2 | 523 | ** Added `pointer->scm', `scm->pointer' to `(system foreign)' |
9d6a151f | 524 | |
7c81eba2 AW |
525 | These procedure are useful if one needs to pass and receive SCM values |
526 | to and from foreign functions. See "Foreign Variables" in the manual, | |
527 | for more. | |
9d6a151f | 528 | |
7c81eba2 | 529 | ** Added `heap-allocated-since-gc' to `(gc-stats)' |
9d6a151f | 530 | |
7c81eba2 | 531 | Also fixed the long-standing bug in the REPL `,stat' command. |
9d6a151f | 532 | |
7c81eba2 | 533 | ** Add `on-error' REPL option |
9d6a151f | 534 | |
7c81eba2 AW |
535 | This option controls what happens when an error occurs at the REPL, and |
536 | defaults to `debug', indicating that Guile should enter the debugger. | |
537 | Other values include `report', which will simply print a backtrace | |
538 | without entering the debugger. See "System Commands" in the manual. | |
9d6a151f | 539 | |
7c81eba2 | 540 | ** Enforce immutability of string literals |
9d6a151f | 541 | |
7c81eba2 | 542 | Attempting to mutate a string literal now causes a runtime error. |
9d6a151f | 543 | |
7c81eba2 | 544 | ** Fix pthread redirection |
9d6a151f | 545 | |
7c81eba2 AW |
546 | Guile 2.0.0 shipped with headers that, if configured with pthread |
547 | support, would re-define `pthread_create', `pthread_join', and other API | |
548 | to redirect to the BDW-GC wrappers, `GC_pthread_create', etc. This was | |
549 | unintended, and not necessary: because threads must enter Guile with | |
2e6829d2 | 550 | `scm_with_guile', Guile can handle thread registration itself, without |
7c81eba2 AW |
551 | needing to make the GC aware of all threads. This oversight has been |
552 | fixed. | |
9d6a151f | 553 | |
7c81eba2 | 554 | ** `with-continuation-barrier' now unwinds on `quit' |
9d6a151f | 555 | |
7c81eba2 AW |
556 | A throw to `quit' in a continuation barrier will cause Guile to exit. |
557 | Before, it would do so before unwinding to the barrier, which would | |
558 | prevent cleanup handlers from running. This has been fixed so that it | |
559 | exits only after unwinding. | |
9d6a151f | 560 | |
7c81eba2 | 561 | ** `string->pointer' and `pointer->string' have optional encoding arg |
9d6a151f | 562 | |
7c81eba2 AW |
563 | This allows users of the FFI to more easily deal in strings with |
564 | particular (non-locale) encodings, like "utf-8". See "Void Pointers and | |
565 | Byte Access" in the manual, for more. | |
9d6a151f | 566 | |
7c81eba2 | 567 | ** R6RS fixnum arithmetic optimizations |
9d6a151f | 568 | |
7c81eba2 AW |
569 | R6RS fixnum operations are are still slower than generic arithmetic, |
570 | however. | |
9d6a151f | 571 | |
7c81eba2 | 572 | ** New procedure: `define-inlinable' |
9d6a151f | 573 | |
7c81eba2 | 574 | See "Inlinable Procedures" in the manual, for more. |
9d6a151f | 575 | |
7c81eba2 | 576 | ** New procedure: `exact-integer-sqrt' |
9d6a151f | 577 | |
7c81eba2 | 578 | See "Integer Operations" in the manual, for more. |
9d6a151f | 579 | |
7c81eba2 | 580 | ** "Extended read syntax" for symbols parses better |
9d6a151f | 581 | |
7c81eba2 AW |
582 | In #{foo}# symbols, backslashes are now treated as escapes, as the |
583 | symbol-printing code intended. Additionally, "\x" within #{foo}# is now | |
584 | interpreted as starting an R6RS hex escape. This is backward compatible | |
585 | because the symbol printer would never produce a "\x" before. The | |
586 | printer also works better too. | |
9d6a151f | 587 | |
6b480ced | 588 | ** Added `--fresh-auto-compile' option |
1e56cff2 AW |
589 | |
590 | This allows a user to invalidate the auto-compilation cache. It's | |
591 | usually not needed. See "Compilation" in the manual, for a discussion. | |
592 | ||
7c81eba2 | 593 | * Manual updates |
9d6a151f | 594 | |
7c81eba2 | 595 | ** GOOPS documentation updates |
9d6a151f | 596 | |
7c81eba2 | 597 | ** New man page |
9d6a151f | 598 | |
7c81eba2 | 599 | Thanks to Mark Harig for improvements to guile.1. |
9d6a151f | 600 | |
7c81eba2 | 601 | ** SRFI-23 documented |
9d6a151f | 602 | |
7c81eba2 | 603 | The humble `error' SRFI now has an entry in the manual. |
9d6a151f | 604 | |
7c81eba2 | 605 | * New modules |
9d6a151f | 606 | |
de424d95 | 607 | ** `(ice-9 binary-ports)': "R6RS I/O Ports", in the manual |
7c81eba2 | 608 | ** `(ice-9 eval-string)': "Fly Evaluation", in the manual |
2e6829d2 | 609 | ** `(ice-9 command-line)', not documented yet |
9d6a151f | 610 | |
882c8963 MW |
611 | * Bugs fixed |
612 | ||
2e6829d2 | 613 | ** Fixed `iconv_t' memory leak on close-port |
7c81eba2 AW |
614 | ** Fixed some leaks with weak hash tables |
615 | ** Export `vhash-delq' and `vhash-delv' from `(ice-9 vlist)' | |
616 | ** `after-gc-hook' works again | |
617 | ** `define-record-type' now allowed in nested contexts | |
618 | ** `exact-integer-sqrt' now handles large integers correctly | |
619 | ** Fixed C extension examples in manual | |
620 | ** `vhash-delete' honors HASH argument | |
621 | ** Make `locale-digit-grouping' more robust | |
622 | ** Default exception printer robustness fixes | |
623 | ** Fix presence of non-I CPPFLAGS in `guile-2.0.pc' | |
624 | ** `read' updates line/column numbers when reading SCSH block comments | |
625 | ** Fix imports of multiple custom interfaces of same module | |
626 | ** Fix encoding scanning for non-seekable ports | |
627 | ** Fix `setter' when called with a non-setter generic | |
628 | ** Fix f32 and f64 bytevectors to not accept rationals | |
629 | ** Fix description of the R6RS `finite?' in manual | |
630 | ** Quotient, remainder and modulo accept inexact integers again | |
631 | ** Fix `continue' within `while' to take zero arguments | |
632 | ** Fix alignment for structures in FFI | |
633 | ** Fix port-filename of stdin, stdout, stderr to match the docs | |
634 | ** Fix weak hash table-related bug in `define-wrapped-pointer-type' | |
635 | ** Fix partial continuation application with pending procedure calls | |
636 | ** scm_{to,from}_locale_string use current locale, not current ports | |
637 | ** Fix thread cleanup, by using a pthread_key destructor | |
638 | ** Fix `quit' at the REPL | |
639 | ** Fix a failure to sync regs in vm bytevector ops | |
640 | ** Fix (texinfo reflection) to handle nested structures like syntax patterns | |
641 | ** Fix stexi->html double translation | |
642 | ** Fix tree-il->scheme fix for <prompt> | |
643 | ** Fix compilation of <prompt> in <fix> in single-value context | |
644 | ** Fix race condition in ensure-writable-dir | |
645 | ** Fix error message on ,disassemble "non-procedure" | |
646 | ** Fix prompt and abort with the boot evaluator | |
647 | ** Fix `procedure->pointer' for functions returning `void' | |
648 | ** Fix error reporting in dynamic-pointer | |
649 | ** Fix problems detecting coding: in block comments | |
650 | ** Fix duplicate load-path and load-compiled-path in compilation environment | |
651 | ** Add fallback read(2) suppport for .go files if mmap(2) unavailable | |
652 | ** Fix c32vector-set!, c64vector-set! | |
653 | ** Fix mistakenly deprecated read syntax for uniform complex vectors | |
654 | ** Fix parsing of exact numbers with negative exponents | |
655 | ** Ignore SIGPIPE in (system repl server) | |
656 | ** Fix optional second arg to R6RS log function | |
657 | ** Fix R6RS `assert' to return true value. | |
658 | ** Fix fencepost error when seeking in bytevector input ports | |
2e6829d2 LC |
659 | ** Gracefully handle `setlocale' errors when starting the REPL |
660 | ** Improve support of the `--disable-posix' configure option | |
661 | ** Make sure R6RS binary ports pass `binary-port?' regardless of the locale | |
662 | ** Gracefully handle unterminated UTF-8 sequences instead of hitting an `assert' | |
882c8963 | 663 | |
882c8963 MW |
664 | |
665 | \f | |
d9f46472 | 666 | Changes in 2.0.0 (changes since the 1.8.x series): |
96b73e84 AW |
667 | |
668 | * New modules (see the manual for details) | |
669 | ||
670 | ** `(srfi srfi-18)', more sophisticated multithreading support | |
ef6b0e8d | 671 | ** `(srfi srfi-27)', sources of random bits |
7cd99cba | 672 | ** `(srfi srfi-38)', External Representation for Data With Shared Structure |
ef6b0e8d AW |
673 | ** `(srfi srfi-42)', eager comprehensions |
674 | ** `(srfi srfi-45)', primitives for expressing iterative lazy algorithms | |
675 | ** `(srfi srfi-67)', compare procedures | |
96b73e84 | 676 | ** `(ice-9 i18n)', internationalization support |
7cd99cba | 677 | ** `(ice-9 futures)', fine-grain parallelism |
0f13fcde | 678 | ** `(rnrs bytevectors)', the R6RS bytevector API |
93617170 | 679 | ** `(rnrs io ports)', a subset of the R6RS I/O port API |
96b73e84 | 680 | ** `(system xref)', a cross-referencing facility (FIXME undocumented) |
dbd9532e | 681 | ** `(ice-9 vlist)', lists with constant-time random access; hash lists |
fb53c347 | 682 | ** `(system foreign)', foreign function interface |
18e90860 AW |
683 | ** `(sxml match)', a pattern matcher for SXML |
684 | ** `(srfi srfi-9 gnu)', extensions to the SRFI-9 record library | |
685 | ** `(system vm coverage)', a line-by-line code coverage library | |
7cd99cba AW |
686 | ** `(web uri)', URI data type, parser, and unparser |
687 | ** `(web http)', HTTP header parsers and unparsers | |
688 | ** `(web request)', HTTP request data type, reader, and writer | |
689 | ** `(web response)', HTTP response data type, reader, and writer | |
690 | ** `(web server)', Generic HTTP server | |
691 | ** `(ice-9 poll)', a poll wrapper | |
692 | ** `(web server http)', HTTP-over-TCP web server implementation | |
66ad445d | 693 | |
51cb0cca AW |
694 | ** Replaced `(ice-9 match)' with Alex Shinn's compatible, hygienic matcher. |
695 | ||
696 | Guile's copy of Andrew K. Wright's `match' library has been replaced by | |
697 | a compatible hygienic implementation by Alex Shinn. It is now | |
698 | documented, see "Pattern Matching" in the manual. | |
699 | ||
700 | Compared to Andrew K. Wright's `match', the new `match' lacks | |
701 | `match-define', `match:error-control', `match:set-error-control', | |
702 | `match:error', `match:set-error', and all structure-related procedures. | |
703 | ||
cf8ec359 AW |
704 | ** Imported statprof, SSAX, and texinfo modules from Guile-Lib |
705 | ||
706 | The statprof statistical profiler, the SSAX XML toolkit, and the texinfo | |
707 | toolkit from Guile-Lib have been imported into Guile proper. See | |
708 | "Standard Library" in the manual for more details. | |
709 | ||
139fa149 AW |
710 | ** Integration of lalr-scm, a parser generator |
711 | ||
712 | Guile has included Dominique Boucher's fine `lalr-scm' parser generator | |
713 | as `(system base lalr)'. See "LALR(1) Parsing" in the manual, for more | |
714 | information. | |
715 | ||
96b73e84 AW |
716 | * Changes to the stand-alone interpreter |
717 | ||
718 | ** Guile now can compile Scheme to bytecode for a custom virtual machine. | |
719 | ||
720 | Compiled code loads much faster than Scheme source code, and runs around | |
721 | 3 or 4 times as fast, generating much less garbage in the process. | |
fa1804e9 | 722 | |
29b98fb2 | 723 | ** Evaluating Scheme code does not use the C stack. |
fa1804e9 | 724 | |
29b98fb2 AW |
725 | Besides when compiling Guile itself, Guile no longer uses a recursive C |
726 | function as an evaluator. This obviates the need to check the C stack | |
727 | pointer for overflow. Continuations still capture the C stack, however. | |
fa1804e9 | 728 | |
96b73e84 AW |
729 | ** New environment variables: GUILE_LOAD_COMPILED_PATH, |
730 | GUILE_SYSTEM_LOAD_COMPILED_PATH | |
fa1804e9 | 731 | |
96b73e84 AW |
732 | GUILE_LOAD_COMPILED_PATH is for compiled files what GUILE_LOAD_PATH is |
733 | for source files. It is a different path, however, because compiled | |
734 | files are architecture-specific. GUILE_SYSTEM_LOAD_COMPILED_PATH is like | |
735 | GUILE_SYSTEM_PATH. | |
736 | ||
737 | ** New read-eval-print loop (REPL) implementation | |
738 | ||
51cb0cca AW |
739 | Running Guile with no arguments drops the user into the new REPL. See |
740 | "Using Guile Interactively" in the manual, for more information. | |
96b73e84 | 741 | |
51cb0cca AW |
742 | ** Remove old Emacs interface |
743 | ||
744 | Guile had an unused `--emacs' command line argument that was supposed to | |
745 | help when running Guile inside Emacs. This option has been removed, and | |
746 | the helper functions `named-module-use!' and `load-emacs-interface' have | |
747 | been deprecated. | |
748 | ||
ef6b0e8d AW |
749 | ** Add `(system repl server)' module and `--listen' command-line argument |
750 | ||
751 | The `(system repl server)' module exposes procedures to listen on | |
752 | sockets for connections, and serve REPLs to those clients. The --listen | |
753 | command-line argument allows any Guile program to thus be remotely | |
754 | debuggable. | |
755 | ||
756 | See "Invoking Guile" for more information on `--listen'. | |
757 | ||
7cd99cba AW |
758 | ** Command line additions |
759 | ||
760 | The guile binary now supports a new switch "-x", which can be used to | |
761 | extend the list of filename extensions tried when loading files | |
762 | (%load-extensions). | |
763 | ||
487bacf4 AW |
764 | ** New reader options: `square-brackets', `r6rs-hex-escapes', |
765 | `hungry-eol-escapes' | |
6bf927ab LC |
766 | |
767 | The reader supports a new option (changeable via `read-options'), | |
768 | `square-brackets', which instructs it to interpret square brackets as | |
29b98fb2 | 769 | parentheses. This option is on by default. |
6bf927ab LC |
770 | |
771 | When the new `r6rs-hex-escapes' reader option is enabled, the reader | |
51cb0cca AW |
772 | will recognize string escape sequences as defined in R6RS. R6RS string |
773 | escape sequences are incompatible with Guile's existing escapes, though, | |
774 | so this option is off by default. | |
6bf927ab | 775 | |
487bacf4 AW |
776 | Additionally, Guile follows the R6RS newline escaping rules when the |
777 | `hungry-eol-escapes' option is enabled. | |
778 | ||
779 | See "String Syntax" in the manual, for more information. | |
780 | ||
cf8ec359 AW |
781 | ** Function profiling and tracing at the REPL |
782 | ||
783 | The `,profile FORM' REPL meta-command can now be used to statistically | |
784 | profile execution of a form, to see which functions are taking the most | |
785 | time. See `,help profile' for more information. | |
786 | ||
787 | Similarly, `,trace FORM' traces all function applications that occur | |
788 | during the execution of `FORM'. See `,help trace' for more information. | |
789 | ||
51cb0cca AW |
790 | ** Recursive debugging REPL on error |
791 | ||
792 | When Guile sees an error at the REPL, instead of saving the stack, Guile | |
793 | will directly enter a recursive REPL in the dynamic context of the | |
794 | error. See "Error Handling" in the manual, for more information. | |
795 | ||
796 | A recursive REPL is the same as any other REPL, except that it | |
797 | has been augmented with debugging information, so that one can inspect | |
798 | the context of the error. The debugger has been integrated with the REPL | |
799 | via a set of debugging meta-commands. | |
cf8ec359 | 800 | |
51cb0cca AW |
801 | For example, one may access a backtrace with `,backtrace' (or |
802 | `,bt'). See "Interactive Debugging" in the manual, for more | |
803 | information. | |
cf8ec359 | 804 | |
96b73e84 AW |
805 | ** New `guile-tools' commands: `compile', `disassemble' |
806 | ||
93617170 | 807 | Pass the `--help' command-line option to these commands for more |
96b73e84 AW |
808 | information. |
809 | ||
b0217d17 AW |
810 | ** Guile now adds its install prefix to the LTDL_LIBRARY_PATH |
811 | ||
812 | Users may now install Guile to nonstandard prefixes and just run | |
813 | `/path/to/bin/guile', instead of also having to set LTDL_LIBRARY_PATH to | |
814 | include `/path/to/lib'. | |
815 | ||
816 | ** Guile's Emacs integration is now more keyboard-friendly | |
817 | ||
818 | Backtraces may now be disclosed with the keyboard in addition to the | |
819 | mouse. | |
820 | ||
cf8ec359 AW |
821 | ** Load path change: search in version-specific paths before site paths |
822 | ||
823 | When looking for a module, Guile now searches first in Guile's | |
824 | version-specific path (the library path), *then* in the site dir. This | |
825 | allows Guile's copy of SSAX to override any Guile-Lib copy the user has | |
826 | installed. Also it should cut the number of `stat' system calls by half, | |
827 | in the common case. | |
828 | ||
51cb0cca AW |
829 | ** Value history in the REPL on by default |
830 | ||
831 | By default, the REPL will save computed values in variables like `$1', | |
832 | `$2', and the like. There are programmatic and interactive interfaces to | |
833 | control this. See "Value History" in the manual, for more information. | |
834 | ||
835 | ** Readline tab completion for arguments | |
836 | ||
837 | When readline is enabled, tab completion works for arguments too, not | |
838 | just for the operator position. | |
839 | ||
7cd99cba AW |
840 | ** Expression-oriented readline history |
841 | ||
842 | Guile's readline history now tries to operate on expressions instead of | |
843 | input lines. Let us know what you think! | |
844 | ||
139fa149 AW |
845 | ** Interactive Guile follows GNU conventions |
846 | ||
847 | As recommended by the GPL, Guile now shows a brief copyright and | |
848 | warranty disclaimer on startup, along with pointers to more information. | |
cf8ec359 | 849 | |
96b73e84 AW |
850 | * Changes to Scheme functions and syntax |
851 | ||
18e90860 AW |
852 | ** Support for R6RS libraries |
853 | ||
854 | The `library' and `import' forms from the latest Scheme report have been | |
855 | added to Guile, in such a way that R6RS libraries share a namespace with | |
856 | Guile modules. R6RS modules may import Guile modules, and are available | |
857 | for Guile modules to import via use-modules and all the rest. See "R6RS | |
858 | Libraries" in the manual for more information. | |
859 | ||
860 | ** Implementations of R6RS libraries | |
861 | ||
862 | Guile now has implementations for all of the libraries defined in the | |
863 | R6RS. Thanks to Julian Graham for this excellent hack. See "R6RS | |
864 | Standard Libraries" in the manual for a full list of libraries. | |
865 | ||
866 | ** Partial R6RS compatibility | |
867 | ||
868 | Guile now has enough support for R6RS to run a reasonably large subset | |
869 | of R6RS programs. | |
870 | ||
871 | Guile is not fully R6RS compatible. Many incompatibilities are simply | |
872 | bugs, though some parts of Guile will remain R6RS-incompatible for the | |
873 | foreseeable future. See "R6RS Incompatibilities" in the manual, for more | |
874 | information. | |
875 | ||
876 | Please contact bug-guile@gnu.org if you have found an issue not | |
877 | mentioned in that compatibility list. | |
878 | ||
4a457691 AW |
879 | ** New implementation of `primitive-eval' |
880 | ||
881 | Guile's `primitive-eval' is now implemented in Scheme. Actually there is | |
882 | still a C evaluator, used when building a fresh Guile to interpret the | |
883 | compiler, so we can compile eval.scm. Thereafter all calls to | |
884 | primitive-eval are implemented by VM-compiled code. | |
885 | ||
886 | This allows all of Guile's procedures, be they interpreted or compiled, | |
887 | to execute on the same stack, unifying multiple-value return semantics, | |
888 | providing for proper tail recursion between interpreted and compiled | |
889 | code, and simplifying debugging. | |
890 | ||
891 | As part of this change, the evaluator no longer mutates the internal | |
892 | representation of the code being evaluated in a thread-unsafe manner. | |
893 | ||
894 | There are two negative aspects of this change, however. First, Guile | |
895 | takes a lot longer to compile now. Also, there is less debugging | |
896 | information available for debugging interpreted code. We hope to improve | |
897 | both of these situations. | |
898 | ||
899 | There are many changes to the internal C evalator interface, but all | |
900 | public interfaces should be the same. See the ChangeLog for details. If | |
901 | we have inadvertantly changed an interface that you were using, please | |
902 | contact bug-guile@gnu.org. | |
903 | ||
96b73e84 AW |
904 | ** Procedure removed: `the-environment' |
905 | ||
906 | This procedure was part of the interpreter's execution model, and does | |
907 | not apply to the compiler. | |
fa1804e9 | 908 | |
4a457691 AW |
909 | ** No more `local-eval' |
910 | ||
911 | `local-eval' used to exist so that one could evaluate code in the | |
912 | lexical context of a function. Since there is no way to get the lexical | |
913 | environment any more, as that concept has no meaning for the compiler, | |
914 | and a different meaning for the interpreter, we have removed the | |
915 | function. | |
916 | ||
917 | If you think you need `local-eval', you should probably implement your | |
918 | own metacircular evaluator. It will probably be as fast as Guile's | |
919 | anyway. | |
920 | ||
139fa149 | 921 | ** Scheme source files will now be compiled automatically. |
fa1804e9 AW |
922 | |
923 | If a compiled .go file corresponding to a .scm file is not found or is | |
924 | not fresh, the .scm file will be compiled on the fly, and the resulting | |
925 | .go file stored away. An advisory note will be printed on the console. | |
926 | ||
51cb0cca AW |
927 | Note that this mechanism depends on the timestamp of the .go file being |
928 | newer than that of the .scm file; if the .scm or .go files are moved | |
929 | after installation, care should be taken to preserve their original | |
fa1804e9 AW |
930 | timestamps. |
931 | ||
6f06e8d3 | 932 | Auto-compiled files will be stored in the $XDG_CACHE_HOME/guile/ccache |
19fef497 AW |
933 | directory, where $XDG_CACHE_HOME defaults to ~/.cache. This directory |
934 | will be created if needed. | |
fa1804e9 | 935 | |
6f06e8d3 AW |
936 | To inhibit automatic compilation, set the GUILE_AUTO_COMPILE environment |
937 | variable to 0, or pass --no-auto-compile on the Guile command line. | |
fa1804e9 | 938 | |
96b73e84 | 939 | ** New POSIX procedures: `getrlimit' and `setrlimit' |
fa1804e9 | 940 | |
96b73e84 AW |
941 | Note however that the interface of these functions is likely to change |
942 | in the next prerelease. | |
fa1804e9 | 943 | |
4a457691 AW |
944 | ** New POSIX procedure: `getsid' |
945 | ||
946 | Scheme binding for the `getsid' C library call. | |
947 | ||
dbd9532e LC |
948 | ** New POSIX procedure: `getaddrinfo' |
949 | ||
950 | Scheme binding for the `getaddrinfo' C library function. | |
951 | ||
7cd99cba AW |
952 | ** Multicast socket options |
953 | ||
954 | Support was added for the IP_MULTICAST_TTL and IP_MULTICAST_IF socket | |
955 | options. See "Network Sockets and Communication" in the manual, for | |
956 | more information. | |
957 | ||
487bacf4 AW |
958 | ** `recv!', `recvfrom!', `send', `sendto' now deal in bytevectors |
959 | ||
960 | These socket procedures now take bytevectors as arguments, instead of | |
961 | strings. There is some deprecated string support, however. | |
962 | ||
7cd99cba AW |
963 | ** New GNU procedures: `setaffinity' and `getaffinity'. |
964 | ||
965 | See "Processes" in the manual, for more information. | |
966 | ||
967 | ** New procedures: `compose', `negate', and `const' | |
968 | ||
969 | See "Higher-Order Functions" in the manual, for more information. | |
970 | ||
96b73e84 | 971 | ** New procedure in `(oops goops)': `method-formals' |
fa1804e9 | 972 | |
96b73e84 AW |
973 | ** New procedures in (ice-9 session): `add-value-help-handler!', |
974 | `remove-value-help-handler!', `add-name-help-handler!' | |
29b98fb2 | 975 | `remove-name-help-handler!', `procedure-arguments' |
fa1804e9 | 976 | |
96b73e84 AW |
977 | The value and name help handlers provide some minimal extensibility to |
978 | the help interface. Guile-lib's `(texinfo reflection)' uses them, for | |
979 | example, to make stexinfo help documentation available. See those | |
980 | procedures' docstrings for more information. | |
981 | ||
982 | `procedure-arguments' describes the arguments that a procedure can take, | |
983 | combining arity and formals. For example: | |
984 | ||
985 | (procedure-arguments resolve-interface) | |
986 | => ((required . (name)) (rest . args)) | |
fa1804e9 | 987 | |
96b73e84 AW |
988 | Additionally, `module-commentary' is now publically exported from |
989 | `(ice-9 session). | |
990 | ||
cf8ec359 | 991 | ** Removed: `procedure->memoizing-macro', `procedure->syntax' |
96b73e84 | 992 | |
cf8ec359 AW |
993 | These procedures created primitive fexprs for the old evaluator, and are |
994 | no longer supported. If you feel that you need these functions, you | |
995 | probably need to write your own metacircular evaluator (which will | |
996 | probably be as fast as Guile's, anyway). | |
96b73e84 AW |
997 | |
998 | ** New language: ECMAScript | |
999 | ||
1000 | Guile now ships with one other high-level language supported, | |
1001 | ECMAScript. The goal is to support all of version 3.1 of the standard, | |
1002 | but not all of the libraries are there yet. This support is not yet | |
1003 | documented; ask on the mailing list if you are interested. | |
1004 | ||
19fef497 AW |
1005 | ** New language: Brainfuck |
1006 | ||
1007 | Brainfuck is a toy language that closely models Turing machines. Guile's | |
1008 | brainfuck compiler is meant to be an example of implementing other | |
1009 | languages. See the manual for details, or | |
1010 | http://en.wikipedia.org/wiki/Brainfuck for more information about the | |
1011 | Brainfuck language itself. | |
1012 | ||
4a457691 AW |
1013 | ** New language: Elisp |
1014 | ||
1015 | Guile now has an experimental Emacs Lisp compiler and runtime. You can | |
1016 | now switch to Elisp at the repl: `,language elisp'. All kudos to Daniel | |
7cd99cba | 1017 | Kraft and Brian Templeton, and all bugs to bug-guile@gnu.org. |
4a457691 | 1018 | |
139fa149 AW |
1019 | ** Better documentation infrastructure for macros |
1020 | ||
1021 | It is now possible to introspect on the type of a macro, e.g. | |
1022 | syntax-rules, identifier-syntax, etc, and extract information about that | |
1023 | macro, such as the syntax-rules patterns or the defmacro arguments. | |
1024 | `(texinfo reflection)' takes advantage of this to give better macro | |
1025 | documentation. | |
1026 | ||
139fa149 AW |
1027 | ** Support for arbitrary procedure metadata |
1028 | ||
1029 | Building on its support for docstrings, Guile now supports multiple | |
1030 | docstrings, adding them to the tail of a compiled procedure's | |
1031 | properties. For example: | |
1032 | ||
1033 | (define (foo) | |
1034 | "one" | |
1035 | "two" | |
1036 | 3) | |
29b98fb2 | 1037 | (procedure-properties foo) |
139fa149 AW |
1038 | => ((name . foo) (documentation . "one") (documentation . "two")) |
1039 | ||
1040 | Also, vectors of pairs are now treated as additional metadata entries: | |
1041 | ||
1042 | (define (bar) | |
1043 | #((quz . #f) (docstring . "xyzzy")) | |
1044 | 3) | |
29b98fb2 | 1045 | (procedure-properties bar) |
139fa149 AW |
1046 | => ((name . bar) (quz . #f) (docstring . "xyzzy")) |
1047 | ||
1048 | This allows arbitrary literals to be embedded as metadata in a compiled | |
1049 | procedure. | |
1050 | ||
96b73e84 AW |
1051 | ** The psyntax expander now knows how to interpret the @ and @@ special |
1052 | forms. | |
1053 | ||
1054 | ** The psyntax expander is now hygienic with respect to modules. | |
1055 | ||
1056 | Free variables in a macro are scoped in the module that the macro was | |
1057 | defined in, not in the module the macro is used in. For example, code | |
1058 | like this works now: | |
1059 | ||
1060 | (define-module (foo) #:export (bar)) | |
1061 | (define (helper x) ...) | |
1062 | (define-syntax bar | |
1063 | (syntax-rules () ((_ x) (helper x)))) | |
1064 | ||
1065 | (define-module (baz) #:use-module (foo)) | |
1066 | (bar qux) | |
1067 | ||
1068 | It used to be you had to export `helper' from `(foo)' as well. | |
1069 | Thankfully, this has been fixed. | |
1070 | ||
51cb0cca | 1071 | ** Support for version information in Guile's `module' form |
cf8ec359 | 1072 | |
51cb0cca AW |
1073 | Guile modules now have a `#:version' field. See "R6RS Version |
1074 | References", "General Information about Modules", "Using Guile Modules", | |
1075 | and "Creating Guile Modules" in the manual for more information. | |
96b73e84 | 1076 | |
cf8ec359 AW |
1077 | ** Support for renaming bindings on module export |
1078 | ||
1079 | Wherever Guile accepts a symbol as an argument to specify a binding to | |
1080 | export, it now also accepts a pair of symbols, indicating that a binding | |
1081 | should be renamed on export. See "Creating Guile Modules" in the manual | |
1082 | for more information. | |
96b73e84 | 1083 | |
18e90860 AW |
1084 | ** New procedure: `module-export-all!' |
1085 | ||
1086 | This procedure exports all current and future bindings from a module. | |
1087 | Use as `(module-export-all! (current-module))'. | |
1088 | ||
7cd99cba AW |
1089 | ** New procedure `reload-module', and `,reload' REPL command |
1090 | ||
1091 | See "Module System Reflection" and "Module Commands" in the manual, for | |
1092 | more information. | |
1093 | ||
96b73e84 AW |
1094 | ** `eval-case' has been deprecated, and replaced by `eval-when'. |
1095 | ||
29b98fb2 AW |
1096 | The semantics of `eval-when' are easier to understand. See "Eval When" |
1097 | in the manual, for more information. | |
96b73e84 AW |
1098 | |
1099 | ** Guile is now more strict about prohibiting definitions in expression | |
1100 | contexts. | |
1101 | ||
1102 | Although previous versions of Guile accepted it, the following | |
1103 | expression is not valid, in R5RS or R6RS: | |
1104 | ||
1105 | (if test (define foo 'bar) (define foo 'baz)) | |
1106 | ||
1107 | In this specific case, it would be better to do: | |
1108 | ||
1109 | (define foo (if test 'bar 'baz)) | |
1110 | ||
79b3863d AW |
1111 | It is possible to circumvent this restriction with e.g. |
1112 | `(module-define! (current-module) 'foo 'baz)'. Contact the list if you | |
1113 | have any questions. | |
96b73e84 | 1114 | |
51cb0cca AW |
1115 | ** Support for `letrec*' |
1116 | ||
1117 | Guile now supports `letrec*', a recursive lexical binding operator in | |
1118 | which the identifiers are bound in order. See "Local Bindings" in the | |
1119 | manual, for more details. | |
1120 | ||
1121 | ** Internal definitions now expand to `letrec*' | |
1122 | ||
1123 | Following the R6RS, internal definitions now expand to letrec* instead | |
1124 | of letrec. The following program is invalid for R5RS, but valid for | |
1125 | R6RS: | |
1126 | ||
1127 | (define (foo) | |
1128 | (define bar 10) | |
1129 | (define baz (+ bar 20)) | |
1130 | baz) | |
1131 | ||
1132 | ;; R5RS and Guile <= 1.8: | |
1133 | (foo) => Unbound variable: bar | |
1134 | ;; R6RS and Guile >= 2.0: | |
1135 | (foo) => 30 | |
1136 | ||
1137 | This change should not affect correct R5RS programs, or programs written | |
1138 | in earlier Guile dialects. | |
1139 | ||
18e90860 AW |
1140 | ** Macro expansion produces structures instead of s-expressions |
1141 | ||
1142 | In the olden days, macroexpanding an s-expression would yield another | |
1143 | s-expression. Though the lexical variables were renamed, expansions of | |
1144 | core forms like `if' and `begin' were still non-hygienic, as they relied | |
1145 | on the toplevel definitions of `if' et al being the conventional ones. | |
1146 | ||
1147 | The solution is to expand to structures instead of s-expressions. There | |
1148 | is an `if' structure, a `begin' structure, a `toplevel-ref' structure, | |
1149 | etc. The expander already did this for compilation, producing Tree-IL | |
1150 | directly; it has been changed now to do so when expanding for the | |
1151 | evaluator as well. | |
1152 | ||
96b73e84 AW |
1153 | ** Defmacros must now produce valid Scheme expressions. |
1154 | ||
1155 | It used to be that defmacros could unquote in Scheme values, as a way of | |
1156 | supporting partial evaluation, and avoiding some hygiene issues. For | |
1157 | example: | |
1158 | ||
1159 | (define (helper x) ...) | |
1160 | (define-macro (foo bar) | |
1161 | `(,helper ,bar)) | |
1162 | ||
1163 | Assuming this macro is in the `(baz)' module, the direct translation of | |
1164 | this code would be: | |
1165 | ||
1166 | (define (helper x) ...) | |
1167 | (define-macro (foo bar) | |
1168 | `((@@ (baz) helper) ,bar)) | |
1169 | ||
1170 | Of course, one could just use a hygienic macro instead: | |
1171 | ||
1172 | (define-syntax foo | |
1173 | (syntax-rules () | |
1174 | ((_ bar) (helper bar)))) | |
1175 | ||
1176 | ** Guile's psyntax now supports docstrings and internal definitions. | |
1177 | ||
1178 | The following Scheme is not strictly legal: | |
1179 | ||
1180 | (define (foo) | |
1181 | "bar" | |
1182 | (define (baz) ...) | |
1183 | (baz)) | |
1184 | ||
1185 | However its intent is fairly clear. Guile interprets "bar" to be the | |
1186 | docstring of `foo', and the definition of `baz' is still in definition | |
1187 | context. | |
1188 | ||
51cb0cca AW |
1189 | ** Support for settable identifier syntax |
1190 | ||
1191 | Following the R6RS, "variable transformers" are settable | |
1192 | identifier-syntax. See "Identifier macros" in the manual, for more | |
1193 | information. | |
1194 | ||
1195 | ** syntax-case treats `_' as a placeholder | |
1196 | ||
1197 | Following R6RS, a `_' in a syntax-rules or syntax-case pattern matches | |
1198 | anything, and binds no pattern variables. Unlike the R6RS, Guile also | |
1199 | permits `_' to be in the literals list for a pattern. | |
1200 | ||
96b73e84 AW |
1201 | ** Macros need to be defined before their first use. |
1202 | ||
1203 | It used to be that with lazy memoization, this might work: | |
1204 | ||
1205 | (define (foo x) | |
1206 | (ref x)) | |
1207 | (define-macro (ref x) x) | |
1208 | (foo 1) => 1 | |
1209 | ||
1210 | But now, the body of `foo' is interpreted to mean a call to the toplevel | |
1211 | `ref' function, instead of a macro expansion. The solution is to define | |
1212 | macros before code that uses them. | |
1213 | ||
1214 | ** Functions needed by macros at expand-time need to be present at | |
1215 | expand-time. | |
1216 | ||
1217 | For example, this code will work at the REPL: | |
1218 | ||
1219 | (define (double-helper x) (* x x)) | |
1220 | (define-macro (double-literal x) (double-helper x)) | |
1221 | (double-literal 2) => 4 | |
1222 | ||
1223 | But it will not work when a file is compiled, because the definition of | |
1224 | `double-helper' is not present at expand-time. The solution is to wrap | |
1225 | the definition of `double-helper' in `eval-when': | |
1226 | ||
1227 | (eval-when (load compile eval) | |
1228 | (define (double-helper x) (* x x))) | |
1229 | (define-macro (double-literal x) (double-helper x)) | |
1230 | (double-literal 2) => 4 | |
1231 | ||
29b98fb2 | 1232 | See the documentation for eval-when for more information. |
96b73e84 | 1233 | |
29b98fb2 | 1234 | ** `macroexpand' produces structures, not S-expressions. |
96b73e84 | 1235 | |
29b98fb2 AW |
1236 | Given the need to maintain referential transparency, both lexically and |
1237 | modular, the result of expanding Scheme expressions is no longer itself | |
1238 | an s-expression. If you want a human-readable approximation of the | |
1239 | result of `macroexpand', call `tree-il->scheme' from `(language | |
1240 | tree-il)'. | |
96b73e84 | 1241 | |
29b98fb2 | 1242 | ** Removed function: `macroexpand-1' |
96b73e84 | 1243 | |
29b98fb2 AW |
1244 | It is unclear how to implement `macroexpand-1' with syntax-case, though |
1245 | PLT Scheme does prove that it is possible. | |
fa1804e9 AW |
1246 | |
1247 | ** New reader macros: #' #` #, #,@ | |
1248 | ||
1249 | These macros translate, respectively, to `syntax', `quasisyntax', | |
1250 | `unsyntax', and `unsyntax-splicing'. See the R6RS for more information. | |
1251 | These reader macros may be overridden by `read-hash-extend'. | |
1252 | ||
1253 | ** Incompatible change to #' | |
1254 | ||
1255 | Guile did have a #' hash-extension, by default, which just returned the | |
1256 | subsequent datum: #'foo => foo. In the unlikely event that anyone | |
1257 | actually used this, this behavior may be reinstated via the | |
1258 | `read-hash-extend' mechanism. | |
1259 | ||
b47fea09 AW |
1260 | ** `unquote' and `unquote-splicing' accept multiple expressions |
1261 | ||
1262 | As per the R6RS, these syntax operators can now accept any number of | |
1263 | expressions to unquote. | |
1264 | ||
fa1804e9 AW |
1265 | ** Scheme expresssions may be commented out with #; |
1266 | ||
93617170 LC |
1267 | #; comments out an entire expression. See SRFI-62 or the R6RS for more |
1268 | information. | |
fa1804e9 | 1269 | |
b0abbaa7 AW |
1270 | ** Prompts: Delimited, composable continuations |
1271 | ||
1272 | Guile now has prompts as part of its primitive language. See "Prompts" | |
1273 | in the manual, for more information. | |
1274 | ||
1275 | Expressions entered in at the REPL, or from the command line, are | |
1276 | surrounded by a prompt with the default prompt tag. | |
1277 | ||
93617170 | 1278 | ** `make-stack' with a tail-called procedural narrowing argument no longer |
fa1804e9 AW |
1279 | works (with compiled procedures) |
1280 | ||
1281 | It used to be the case that a captured stack could be narrowed to select | |
1282 | calls only up to or from a certain procedure, even if that procedure | |
1283 | already tail-called another procedure. This was because the debug | |
1284 | information from the original procedure was kept on the stack. | |
1285 | ||
1286 | Now with the new compiler, the stack only contains active frames from | |
1287 | the current continuation. A narrow to a procedure that is not in the | |
1288 | stack will result in an empty stack. To fix this, narrow to a procedure | |
1289 | that is active in the current continuation, or narrow to a specific | |
1290 | number of stack frames. | |
1291 | ||
29b98fb2 | 1292 | ** Backtraces through compiled procedures only show procedures that are |
fa1804e9 AW |
1293 | active in the current continuation |
1294 | ||
1295 | Similarly to the previous issue, backtraces in compiled code may be | |
1296 | different from backtraces in interpreted code. There are no semantic | |
1297 | differences, however. Please mail bug-guile@gnu.org if you see any | |
1298 | deficiencies with Guile's backtraces. | |
1299 | ||
b47fea09 AW |
1300 | ** `positions' reader option enabled by default |
1301 | ||
1302 | This change allows primitive-load without --auto-compile to also | |
1303 | propagate source information through the expander, for better errors and | |
1304 | to let macros know their source locations. The compiler was already | |
1305 | turning it on anyway. | |
1306 | ||
51cb0cca AW |
1307 | ** New macro: `current-source-location' |
1308 | ||
1309 | The macro returns the current source location (to be documented). | |
1310 | ||
fa1804e9 AW |
1311 | ** syntax-rules and syntax-case macros now propagate source information |
1312 | through to the expanded code | |
1313 | ||
1314 | This should result in better backtraces. | |
1315 | ||
1316 | ** The currying behavior of `define' has been removed. | |
1317 | ||
1318 | Before, `(define ((f a) b) (* a b))' would translate to | |
1319 | ||
1320 | (define f (lambda (a) (lambda (b) (* a b)))) | |
1321 | ||
93617170 | 1322 | Now a syntax error is signaled, as this syntax is not supported by |
29b98fb2 AW |
1323 | default. Use the `(ice-9 curried-definitions)' module to get back the |
1324 | old behavior. | |
fa1804e9 | 1325 | |
4a457691 AW |
1326 | ** New procedure, `define!' |
1327 | ||
1328 | `define!' is a procedure that takes two arguments, a symbol and a value, | |
1329 | and binds the value to the symbol in the current module. It's useful to | |
1330 | programmatically make definitions in the current module, and is slightly | |
1331 | less verbose than `module-define!'. | |
1332 | ||
fa1804e9 AW |
1333 | ** All modules have names now |
1334 | ||
1335 | Before, you could have anonymous modules: modules without names. Now, | |
1336 | because of hygiene and macros, all modules have names. If a module was | |
1337 | created without a name, the first time `module-name' is called on it, a | |
1338 | fresh name will be lazily generated for it. | |
1339 | ||
18e90860 AW |
1340 | ** The module namespace is now separate from the value namespace |
1341 | ||
1342 | It was a little-known implementation detail of Guile's module system | |
1343 | that it was built on a single hierarchical namespace of values -- that | |
1344 | if there was a module named `(foo bar)', then in the module named | |
1345 | `(foo)' there was a binding from `bar' to the `(foo bar)' module. | |
1346 | ||
1347 | This was a neat trick, but presented a number of problems. One problem | |
1348 | was that the bindings in a module were not apparent from the module | |
1349 | itself; perhaps the `(foo)' module had a private binding for `bar', and | |
1350 | then an external contributor defined `(foo bar)'. In the end there can | |
1351 | be only one binding, so one of the two will see the wrong thing, and | |
1352 | produce an obtuse error of unclear provenance. | |
1353 | ||
1354 | Also, the public interface of a module was also bound in the value | |
1355 | namespace, as `%module-public-interface'. This was a hack from the early | |
1356 | days of Guile's modules. | |
1357 | ||
1358 | Both of these warts have been fixed by the addition of fields in the | |
1359 | `module' data type. Access to modules and their interfaces from the | |
1360 | value namespace has been deprecated, and all accessors use the new | |
1361 | record accessors appropriately. | |
1362 | ||
1363 | When Guile is built with support for deprecated code, as is the default, | |
1364 | the value namespace is still searched for modules and public interfaces, | |
1365 | and a deprecation warning is raised as appropriate. | |
1366 | ||
1367 | Finally, to support lazy loading of modules as one used to be able to do | |
1368 | with module binder procedures, Guile now has submodule binders, called | |
1369 | if a given submodule is not found. See boot-9.scm for more information. | |
1370 | ||
1371 | ** New procedures: module-ref-submodule, module-define-submodule, | |
1372 | nested-ref-module, nested-define-module!, local-ref-module, | |
1373 | local-define-module | |
1374 | ||
1375 | These new accessors are like their bare variants, but operate on | |
1376 | namespaces instead of values. | |
1377 | ||
1378 | ** The (app modules) module tree is officially deprecated | |
1379 | ||
1380 | It used to be that one could access a module named `(foo bar)' via | |
1381 | `(nested-ref the-root-module '(app modules foo bar))'. The `(app | |
1382 | modules)' bit was a never-used and never-documented abstraction, and has | |
1383 | been deprecated. See the following mail for a full discussion: | |
1384 | ||
1385 | http://lists.gnu.org/archive/html/guile-devel/2010-04/msg00168.html | |
1386 | ||
1387 | The `%app' binding is also deprecated. | |
1388 | ||
51cb0cca AW |
1389 | ** `module-filename' field and accessor |
1390 | ||
1391 | Modules now record the file in which they are defined. This field may be | |
1392 | accessed with the new `module-filename' procedure. | |
1393 | ||
1394 | ** Modules load within a known environment | |
1395 | ||
1396 | It takes a few procedure calls to define a module, and those procedure | |
1397 | calls need to be in scope. Now we ensure that the current module when | |
1398 | loading a module is one that has the needed bindings, instead of relying | |
1399 | on chance. | |
1400 | ||
b47fea09 AW |
1401 | ** `load' is a macro (!) that resolves paths relative to source file dir |
1402 | ||
1403 | The familiar Schem `load' procedure is now a macro that captures the | |
1404 | name of the source file being expanded, and dispatches to the new | |
1405 | `load-in-vicinity'. Referencing `load' by bare name returns a closure | |
1406 | that embeds the current source file name. | |
1407 | ||
1408 | This fix allows `load' of relative paths to be resolved with respect to | |
1409 | the location of the file that calls `load'. | |
1410 | ||
fa1804e9 AW |
1411 | ** Many syntax errors have different texts now |
1412 | ||
1413 | Syntax errors still throw to the `syntax-error' key, but the arguments | |
1414 | are often different now. Perhaps in the future, Guile will switch to | |
93617170 | 1415 | using standard SRFI-35 conditions. |
fa1804e9 AW |
1416 | |
1417 | ** Returning multiple values to compiled code will silently truncate the | |
1418 | values to the expected number | |
1419 | ||
1420 | For example, the interpreter would raise an error evaluating the form, | |
1421 | `(+ (values 1 2) (values 3 4))', because it would see the operands as | |
1422 | being two compound "values" objects, to which `+' does not apply. | |
1423 | ||
1424 | The compiler, on the other hand, receives multiple values on the stack, | |
1425 | not as a compound object. Given that it must check the number of values | |
1426 | anyway, if too many values are provided for a continuation, it chooses | |
1427 | to truncate those values, effectively evaluating `(+ 1 3)' instead. | |
1428 | ||
1429 | The idea is that the semantics that the compiler implements is more | |
1430 | intuitive, and the use of the interpreter will fade out with time. | |
1431 | This behavior is allowed both by the R5RS and the R6RS. | |
1432 | ||
1433 | ** Multiple values in compiled code are not represented by compound | |
1434 | objects | |
1435 | ||
1436 | This change may manifest itself in the following situation: | |
1437 | ||
1438 | (let ((val (foo))) (do-something) val) | |
1439 | ||
1440 | In the interpreter, if `foo' returns multiple values, multiple values | |
1441 | are produced from the `let' expression. In the compiler, those values | |
1442 | are truncated to the first value, and that first value is returned. In | |
1443 | the compiler, if `foo' returns no values, an error will be raised, while | |
1444 | the interpreter would proceed. | |
1445 | ||
1446 | Both of these behaviors are allowed by R5RS and R6RS. The compiler's | |
1447 | behavior is more correct, however. If you wish to preserve a potentially | |
1448 | multiply-valued return, you will need to set up a multiple-value | |
1449 | continuation, using `call-with-values'. | |
1450 | ||
1451 | ** Defmacros are now implemented in terms of syntax-case. | |
1452 | ||
1453 | The practical ramification of this is that the `defmacro?' predicate has | |
1454 | been removed, along with `defmacro-transformer', `macro-table', | |
1455 | `xformer-table', `assert-defmacro?!', `set-defmacro-transformer!' and | |
1456 | `defmacro:transformer'. This is because defmacros are simply macros. If | |
1457 | any of these procedures provided useful facilities to you, we encourage | |
1458 | you to contact the Guile developers. | |
1459 | ||
139fa149 AW |
1460 | ** Hygienic macros documented as the primary syntactic extension mechanism. |
1461 | ||
1462 | The macro documentation was finally fleshed out with some documentation | |
29b98fb2 AW |
1463 | on `syntax-rules' and `syntax-case' macros, and other parts of the macro |
1464 | expansion process. See "Macros" in the manual, for details. | |
139fa149 | 1465 | |
fa1804e9 AW |
1466 | ** psyntax is now the default expander |
1467 | ||
1468 | Scheme code is now expanded by default by the psyntax hygienic macro | |
1469 | expander. Expansion is performed completely before compilation or | |
1470 | interpretation. | |
1471 | ||
1472 | Notably, syntax errors will be signalled before interpretation begins. | |
1473 | In the past, many syntax errors were only detected at runtime if the | |
1474 | code in question was memoized. | |
1475 | ||
1476 | As part of its expansion, psyntax renames all lexically-bound | |
1477 | identifiers. Original identifier names are preserved and given to the | |
1478 | compiler, but the interpreter will see the renamed variables, e.g., | |
1479 | `x432' instead of `x'. | |
1480 | ||
1481 | Note that the psyntax that Guile uses is a fork, as Guile already had | |
1482 | modules before incompatible modules were added to psyntax -- about 10 | |
1483 | years ago! Thus there are surely a number of bugs that have been fixed | |
1484 | in psyntax since then. If you find one, please notify bug-guile@gnu.org. | |
1485 | ||
1486 | ** syntax-rules and syntax-case are available by default. | |
1487 | ||
1488 | There is no longer any need to import the `(ice-9 syncase)' module | |
1489 | (which is now deprecated). The expander may be invoked directly via | |
29b98fb2 | 1490 | `macroexpand', though it is normally searched for via the current module |
fa1804e9 AW |
1491 | transformer. |
1492 | ||
1493 | Also, the helper routines for syntax-case are available in the default | |
1494 | environment as well: `syntax->datum', `datum->syntax', | |
1495 | `bound-identifier=?', `free-identifier=?', `generate-temporaries', | |
1496 | `identifier?', and `syntax-violation'. See the R6RS for documentation. | |
1497 | ||
4a457691 AW |
1498 | ** Tail patterns in syntax-case |
1499 | ||
1500 | Guile has pulled in some more recent changes from the psyntax portable | |
1501 | syntax expander, to implement support for "tail patterns". Such patterns | |
1502 | are supported by syntax-rules and syntax-case. This allows a syntax-case | |
1503 | match clause to have ellipses, then a pattern at the end. For example: | |
1504 | ||
1505 | (define-syntax case | |
1506 | (syntax-rules (else) | |
1507 | ((_ val match-clause ... (else e e* ...)) | |
1508 | [...]))) | |
1509 | ||
1510 | Note how there is MATCH-CLAUSE, which is ellipsized, then there is a | |
1511 | tail pattern for the else clause. Thanks to Andreas Rottmann for the | |
1512 | patch, and Kent Dybvig for the code. | |
1513 | ||
fa1804e9 AW |
1514 | ** Lexical bindings introduced by hygienic macros may not be referenced |
1515 | by nonhygienic macros. | |
1516 | ||
1517 | If a lexical binding is introduced by a hygienic macro, it may not be | |
1518 | referenced by a nonhygienic macro. For example, this works: | |
1519 | ||
1520 | (let () | |
1521 | (define-macro (bind-x val body) | |
1522 | `(let ((x ,val)) ,body)) | |
1523 | (define-macro (ref x) | |
1524 | x) | |
1525 | (bind-x 10 (ref x))) | |
1526 | ||
1527 | But this does not: | |
1528 | ||
1529 | (let () | |
1530 | (define-syntax bind-x | |
1531 | (syntax-rules () | |
1532 | ((_ val body) (let ((x val)) body)))) | |
1533 | (define-macro (ref x) | |
1534 | x) | |
1535 | (bind-x 10 (ref x))) | |
1536 | ||
1537 | It is not normal to run into this situation with existing code. However, | |
51cb0cca | 1538 | if you have defmacros that expand to hygienic macros, it is possible to |
66ad445d AW |
1539 | run into situations like this. For example, if you have a defmacro that |
1540 | generates a `while' expression, the `break' bound by the `while' may not | |
1541 | be visible within other parts of your defmacro. The solution is to port | |
1542 | from defmacros to syntax-rules or syntax-case. | |
fa1804e9 AW |
1543 | |
1544 | ** Macros may no longer be referenced as first-class values. | |
1545 | ||
1546 | In the past, you could evaluate e.g. `if', and get its macro value. Now, | |
1547 | expanding this form raises a syntax error. | |
1548 | ||
1549 | Macros still /exist/ as first-class values, but they must be | |
1550 | /referenced/ via the module system, e.g. `(module-ref (current-module) | |
1551 | 'if)'. | |
1552 | ||
29b98fb2 AW |
1553 | ** Macros may now have docstrings. |
1554 | ||
1555 | `object-documentation' from `(ice-9 documentation)' may be used to | |
1556 | retrieve the docstring, once you have a macro value -- but see the above | |
1557 | note about first-class macros. Docstrings are associated with the syntax | |
1558 | transformer procedures. | |
fa1804e9 | 1559 | |
e614d375 AW |
1560 | ** `case-lambda' is now available in the default environment. |
1561 | ||
1562 | The binding in the default environment is equivalent to the one from the | |
1563 | `(srfi srfi-16)' module. Use the srfi-16 module explicitly if you wish | |
1564 | to maintain compatibility with Guile 1.8 and earlier. | |
1565 | ||
29b98fb2 | 1566 | ** Procedures may now have more than one arity. |
5bb408cc AW |
1567 | |
1568 | This can be the case, for example, in case-lambda procedures. The | |
1569 | arities of compiled procedures may be accessed via procedures from the | |
1570 | `(system vm program)' module; see "Compiled Procedures", "Optional | |
1571 | Arguments", and "Case-lambda" in the manual. | |
1572 | ||
18e90860 AW |
1573 | ** Deprecate arity access via (procedure-properties proc 'arity) |
1574 | ||
1575 | Instead of accessing a procedure's arity as a property, use the new | |
1576 | `procedure-minimum-arity' function, which gives the most permissive | |
b3da54d1 | 1577 | arity that the function has, in the same format as the old arity |
18e90860 AW |
1578 | accessor. |
1579 | ||
e614d375 AW |
1580 | ** `lambda*' and `define*' are now available in the default environment |
1581 | ||
1582 | As with `case-lambda', `(ice-9 optargs)' continues to be supported, for | |
1583 | compatibility purposes. No semantic change has been made (we hope). | |
1584 | Optional and keyword arguments now dispatch via special VM operations, | |
1585 | without the need to cons rest arguments, making them very fast. | |
1586 | ||
487bacf4 AW |
1587 | ** New syntax: define-once |
1588 | ||
1589 | `define-once' is like Lisp's `defvar': it creates a toplevel binding, | |
1590 | but only if one does not exist already. | |
1591 | ||
cf8ec359 AW |
1592 | ** New function, `truncated-print', with `format' support |
1593 | ||
1594 | `(ice-9 pretty-print)' now exports `truncated-print', a printer that | |
1595 | will ensure that the output stays within a certain width, truncating the | |
1596 | output in what is hopefully an intelligent manner. See the manual for | |
1597 | more details. | |
1598 | ||
1599 | There is a new `format' specifier, `~@y', for doing a truncated | |
1600 | print (as opposed to `~y', which does a pretty-print). See the `format' | |
1601 | documentation for more details. | |
1602 | ||
7cd99cba AW |
1603 | ** Better pretty-printing |
1604 | ||
1605 | Indentation recognizes more special forms, like `syntax-case', and read | |
1606 | macros like `quote' are printed better. | |
1607 | ||
51cb0cca AW |
1608 | ** Passing a number as the destination of `format' is deprecated |
1609 | ||
1610 | The `format' procedure in `(ice-9 format)' now emits a deprecation | |
1611 | warning if a number is passed as its first argument. | |
1612 | ||
487bacf4 AW |
1613 | Also, it used to be that you could omit passing a port to `format', in |
1614 | some cases. This still works, but has been formally deprecated. | |
1615 | ||
cf8ec359 AW |
1616 | ** SRFI-4 vectors reimplemented in terms of R6RS bytevectors |
1617 | ||
1618 | Guile now implements SRFI-4 vectors using bytevectors. Often when you | |
1619 | have a numeric vector, you end up wanting to write its bytes somewhere, | |
1620 | or have access to the underlying bytes, or read in bytes from somewhere | |
1621 | else. Bytevectors are very good at this sort of thing. But the SRFI-4 | |
1622 | APIs are nicer to use when doing number-crunching, because they are | |
1623 | addressed by element and not by byte. | |
1624 | ||
1625 | So as a compromise, Guile allows all bytevector functions to operate on | |
1626 | numeric vectors. They address the underlying bytes in the native | |
1627 | endianness, as one would expect. | |
1628 | ||
1629 | Following the same reasoning, that it's just bytes underneath, Guile | |
1630 | also allows uniform vectors of a given type to be accessed as if they | |
1631 | were of any type. One can fill a u32vector, and access its elements with | |
1632 | u8vector-ref. One can use f64vector-ref on bytevectors. It's all the | |
1633 | same to Guile. | |
1634 | ||
1635 | In this way, uniform numeric vectors may be written to and read from | |
1636 | input/output ports using the procedures that operate on bytevectors. | |
1637 | ||
1638 | Calls to SRFI-4 accessors (ref and set functions) from Scheme are now | |
1639 | inlined to the VM instructions for bytevector access. | |
1640 | ||
1641 | See "SRFI-4" in the manual, for more information. | |
1642 | ||
1643 | ** Nonstandard SRFI-4 procedures now available from `(srfi srfi-4 gnu)' | |
1644 | ||
1645 | Guile's `(srfi srfi-4)' now only exports those srfi-4 procedures that | |
1646 | are part of the standard. Complex uniform vectors and the | |
1647 | `any->FOOvector' family are now available only from `(srfi srfi-4 gnu)'. | |
1648 | ||
1649 | Guile's default environment imports `(srfi srfi-4)', and probably should | |
1650 | import `(srfi srfi-4 gnu)' as well. | |
1651 | ||
1652 | See "SRFI-4 Extensions" in the manual, for more information. | |
1653 | ||
e614d375 AW |
1654 | ** New syntax: include-from-path. |
1655 | ||
1656 | `include-from-path' is like `include', except it looks for its file in | |
1657 | the load path. It can be used to compile other files into a file. | |
1658 | ||
1659 | ** New syntax: quasisyntax. | |
1660 | ||
1661 | `quasisyntax' is to `syntax' as `quasiquote' is to `quote'. See the R6RS | |
1662 | documentation for more information. Thanks to Andre van Tonder for the | |
1663 | implementation. | |
1664 | ||
51cb0cca AW |
1665 | ** `*unspecified*' is identifier syntax |
1666 | ||
1667 | `*unspecified*' is no longer a variable, so it is optimized properly by | |
1668 | the compiler, and is not `set!'-able. | |
1669 | ||
487bacf4 AW |
1670 | ** Changes and bugfixes in numerics code |
1671 | ||
1672 | *** Added six new sets of fast quotient and remainder operators | |
1673 | ||
1674 | Added six new sets of fast quotient and remainder operator pairs with | |
1675 | different semantics than the R5RS operators. They support not only | |
1676 | integers, but all reals, including exact rationals and inexact | |
1677 | floating point numbers. | |
1678 | ||
1679 | These procedures accept two real numbers N and D, where the divisor D | |
1680 | must be non-zero. Each set of operators computes an integer quotient | |
1681 | Q and a real remainder R such that N = Q*D + R and |R| < |D|. They | |
1682 | differ only in how N/D is rounded to produce Q. | |
1683 | ||
1684 | `euclidean-quotient' returns the integer Q and `euclidean-remainder' | |
1685 | returns the real R such that N = Q*D + R and 0 <= R < |D|. `euclidean/' | |
1686 | returns both Q and R, and is more efficient than computing each | |
1687 | separately. Note that when D > 0, `euclidean-quotient' returns | |
1688 | floor(N/D), and when D < 0 it returns ceiling(N/D). | |
1689 | ||
1690 | `centered-quotient', `centered-remainder', and `centered/' are similar | |
1691 | except that the range of remainders is -abs(D/2) <= R < abs(D/2), and | |
1692 | `centered-quotient' rounds N/D to the nearest integer. Note that these | |
1693 | operators are equivalent to the R6RS integer division operators `div', | |
1694 | `mod', `div-and-mod', `div0', `mod0', and `div0-and-mod0'. | |
1695 | ||
1696 | `floor-quotient' and `floor-remainder' compute Q and R, respectively, | |
1697 | where Q has been rounded toward negative infinity. `floor/' returns | |
1698 | both Q and R, and is more efficient than computing each separately. | |
1699 | Note that when applied to integers, `floor-remainder' is equivalent to | |
1700 | the R5RS integer-only `modulo' operator. `ceiling-quotient', | |
1701 | `ceiling-remainder', and `ceiling/' are similar except that Q is | |
1702 | rounded toward positive infinity. | |
1703 | ||
1704 | For `truncate-quotient', `truncate-remainder', and `truncate/', Q is | |
1705 | rounded toward zero. Note that when applied to integers, | |
1706 | `truncate-quotient' and `truncate-remainder' are equivalent to the | |
1707 | R5RS integer-only operators `quotient' and `remainder'. | |
1708 | ||
1709 | For `round-quotient', `round-remainder', and `round/', Q is rounded to | |
1710 | the nearest integer, with ties going to the nearest even integer. | |
1711 | ||
1712 | *** Complex number changes | |
1713 | ||
1714 | Guile is now able to represent non-real complex numbers whose | |
1715 | imaginary part is an _inexact_ zero (0.0 or -0.0), per R6RS. | |
1716 | Previously, such numbers were immediately changed into inexact reals. | |
1717 | ||
1718 | (real? 0.0+0.0i) now returns #f, per R6RS, although (zero? 0.0+0.0i) | |
1719 | still returns #t, per R6RS. (= 0 0.0+0.0i) and (= 0.0 0.0+0.0i) are | |
1720 | #t, but the same comparisons using `eqv?' or `equal?' are #f. | |
1721 | ||
1722 | Like other non-real numbers, these complex numbers with inexact zero | |
1723 | imaginary part will raise exceptions is passed to procedures requiring | |
1724 | reals, such as `<', `>', `<=', `>=', `min', `max', `positive?', | |
1725 | `negative?', `inf?', `nan?', `finite?', etc. | |
1726 | ||
1727 | **** `make-rectangular' changes | |
1728 | ||
1729 | scm_make_rectangular `make-rectangular' now returns a real number only | |
1730 | if the imaginary part is an _exact_ 0. Previously, it would return a | |
1731 | real number if the imaginary part was an inexact zero. | |
1732 | ||
1733 | scm_c_make_rectangular now always returns a non-real complex number, | |
1734 | even if the imaginary part is zero. Previously, it would return a | |
1735 | real number if the imaginary part was zero. | |
1736 | ||
1737 | **** `make-polar' changes | |
1738 | ||
1739 | scm_make_polar `make-polar' now returns a real number only if the | |
1740 | angle or magnitude is an _exact_ 0. If the magnitude is an exact 0, | |
1741 | it now returns an exact 0. Previously, it would return a real | |
1742 | number if the imaginary part was an inexact zero. | |
1743 | ||
1744 | scm_c_make_polar now always returns a non-real complex number, even if | |
1745 | the imaginary part is 0.0. Previously, it would return a real number | |
1746 | if the imaginary part was 0.0. | |
1747 | ||
1748 | **** `imag-part' changes | |
1749 | ||
1750 | scm_imag_part `imag-part' now returns an exact 0 if applied to an | |
1751 | inexact real number. Previously it returned an inexact zero in this | |
1752 | case. | |
1753 | ||
1754 | *** `eqv?' and `equal?' now compare numbers equivalently | |
1755 | ||
1756 | scm_equal_p `equal?' now behaves equivalently to scm_eqv_p `eqv?' for | |
1757 | numeric values, per R5RS. Previously, equal? worked differently, | |
1758 | e.g. `(equal? 0.0 -0.0)' returned #t but `(eqv? 0.0 -0.0)' returned #f, | |
1759 | and `(equal? +nan.0 +nan.0)' returned #f but `(eqv? +nan.0 +nan.0)' | |
1760 | returned #t. | |
1761 | ||
1762 | *** `(equal? +nan.0 +nan.0)' now returns #t | |
1763 | ||
1764 | Previously, `(equal? +nan.0 +nan.0)' returned #f, although | |
1765 | `(let ((x +nan.0)) (equal? x x))' and `(eqv? +nan.0 +nan.0)' | |
1766 | both returned #t. R5RS requires that `equal?' behave like | |
1767 | `eqv?' when comparing numbers. | |
1768 | ||
1769 | *** Change in handling products `*' involving exact 0 | |
1770 | ||
1771 | scm_product `*' now handles exact 0 differently. A product containing | |
1772 | an exact 0 now returns an exact 0 if and only if the other arguments | |
1773 | are all exact. An inexact zero is returned if and only if the other | |
1774 | arguments are all finite but not all exact. If an infinite or NaN | |
1775 | value is present, a NaN value is returned. Previously, any product | |
1776 | containing an exact 0 yielded an exact 0, regardless of the other | |
1777 | arguments. | |
1778 | ||
1779 | *** `expt' and `integer-expt' changes when the base is 0 | |
1780 | ||
1781 | While `(expt 0 0)' is still 1, and `(expt 0 N)' for N > 0 is still | |
1782 | zero, `(expt 0 N)' for N < 0 is now a NaN value, and likewise for | |
1783 | integer-expt. This is more correct, and conforming to R6RS, but seems | |
1784 | to be incompatible with R5RS, which would return 0 for all non-zero | |
1785 | values of N. | |
1786 | ||
1787 | *** `expt' and `integer-expt' are more generic, less strict | |
1788 | ||
1789 | When raising to an exact non-negative integer exponent, `expt' and | |
1790 | `integer-expt' are now able to exponentiate any object that can be | |
1791 | multiplied using `*'. They can also raise an object to an exact | |
1792 | negative integer power if its reciprocal can be taken using `/'. | |
1793 | In order to allow this, the type of the first argument is no longer | |
1794 | checked when raising to an exact integer power. If the exponent is 0 | |
1795 | or 1, the first parameter is not manipulated at all, and need not | |
1796 | even support multiplication. | |
1797 | ||
1798 | *** Infinities are no longer integers, nor rationals | |
1799 | ||
1800 | scm_integer_p `integer?' and scm_rational_p `rational?' now return #f | |
1801 | for infinities, per R6RS. Previously they returned #t for real | |
1802 | infinities. The real infinities and NaNs are still considered real by | |
1803 | scm_real `real?' however, per R6RS. | |
1804 | ||
1805 | *** NaNs are no longer rationals | |
1806 | ||
1807 | scm_rational_p `rational?' now returns #f for NaN values, per R6RS. | |
1808 | Previously it returned #t for real NaN values. They are still | |
1809 | considered real by scm_real `real?' however, per R6RS. | |
1810 | ||
1811 | *** `inf?' and `nan?' now throw exceptions for non-reals | |
1812 | ||
1813 | The domain of `inf?' and `nan?' is the real numbers. Guile now signals | |
1814 | an error when a non-real number or non-number is passed to these | |
1815 | procedures. (Note that NaNs _are_ considered numbers by scheme, despite | |
1816 | their name). | |
1817 | ||
1818 | *** `rationalize' bugfixes and changes | |
1819 | ||
1820 | Fixed bugs in scm_rationalize `rationalize'. Previously, it returned | |
1821 | exact integers unmodified, although that was incorrect if the epsilon | |
1822 | was at least 1 or inexact, e.g. (rationalize 4 1) should return 3 per | |
1823 | R5RS and R6RS, but previously it returned 4. It also now handles | |
1824 | cases involving infinities and NaNs properly, per R6RS. | |
1825 | ||
1826 | *** Trigonometric functions now return exact numbers in some cases | |
1827 | ||
1828 | scm_sin `sin', scm_cos `cos', scm_tan `tan', scm_asin `asin', scm_acos | |
1829 | `acos', scm_atan `atan', scm_sinh `sinh', scm_cosh `cosh', scm_tanh | |
1830 | `tanh', scm_sys_asinh `asinh', scm_sys_acosh `acosh', and | |
1831 | scm_sys_atanh `atanh' now return exact results in some cases. | |
1832 | ||
1833 | *** New procedure: `finite?' | |
1834 | ||
1835 | Add scm_finite_p `finite?' from R6RS to guile core, which returns #t | |
1836 | if and only if its argument is neither infinite nor a NaN. Note that | |
1837 | this is not the same as (not (inf? x)) or (not (infinite? x)), since | |
1838 | NaNs are neither finite nor infinite. | |
1839 | ||
1840 | *** Improved exactness handling for complex number parsing | |
1841 | ||
1842 | When parsing non-real complex numbers, exactness specifiers are now | |
1843 | applied to each component, as is done in PLT Scheme. For complex | |
1844 | numbers written in rectangular form, exactness specifiers are applied | |
1845 | to the real and imaginary parts before calling scm_make_rectangular. | |
1846 | For complex numbers written in polar form, exactness specifiers are | |
1847 | applied to the magnitude and angle before calling scm_make_polar. | |
1848 | ||
1849 | Previously, exactness specifiers were applied to the number as a whole | |
1850 | _after_ calling scm_make_rectangular or scm_make_polar. | |
1851 | ||
1852 | For example, (string->number "#i5.0+0i") now does the equivalent of: | |
1853 | ||
1854 | (make-rectangular (exact->inexact 5.0) (exact->inexact 0)) | |
1855 | ||
1856 | which yields 5.0+0.0i. Previously it did the equivalent of: | |
1857 | ||
1858 | (exact->inexact (make-rectangular 5.0 0)) | |
1859 | ||
1860 | which yielded 5.0. | |
1861 | ||
108e18b1 AW |
1862 | ** Unicode characters |
1863 | ||
1864 | Unicode characters may be entered in octal format via e.g. `#\454', or | |
1865 | created via (integer->char 300). A hex external representation will | |
1866 | probably be introduced at some point. | |
1867 | ||
1868 | ** Unicode strings | |
1869 | ||
1870 | Internally, strings are now represented either in the `latin-1' | |
1871 | encoding, one byte per character, or in UTF-32, with four bytes per | |
1872 | character. Strings manage their own allocation, switching if needed. | |
1873 | ||
99e31c32 AW |
1874 | Extended characters may be written in a literal string using the |
1875 | hexadecimal escapes `\xXX', `\uXXXX', or `\UXXXXXX', for 8-bit, 16-bit, | |
1876 | or 24-bit codepoints, respectively, or entered directly in the native | |
1877 | encoding of the port on which the string is read. | |
1878 | ||
56664c08 AW |
1879 | ** Unicode symbols |
1880 | ||
1881 | One may now use U+03BB (GREEK SMALL LETTER LAMBDA) as an identifier. | |
1882 | ||
99e31c32 AW |
1883 | ** Support for non-ASCII source code files |
1884 | ||
1885 | The default reader now handles source code files for some of the | |
1886 | non-ASCII character encodings, such as UTF-8. A non-ASCII source file | |
1887 | should have an encoding declaration near the top of the file. Also, | |
1888 | there is a new function, `file-encoding', that scans a port for a coding | |
1889 | declaration. See the section of the manual entitled, "Character Encoding | |
1890 | of Source Files". | |
1891 | ||
1892 | The pre-1.9.3 reader handled 8-bit clean but otherwise unspecified source | |
51cb0cca AW |
1893 | code. This use is now discouraged. Binary input and output is |
1894 | currently supported by opening ports in the ISO-8859-1 locale. | |
99e31c32 | 1895 | |
487bacf4 AW |
1896 | ** Source files default to UTF-8. |
1897 | ||
1898 | If source files do not specify their encoding via a `coding:' block, | |
1899 | the default encoding is UTF-8, instead of being taken from the current | |
1900 | locale. | |
1901 | ||
1902 | ** Interactive Guile installs the current locale. | |
1903 | ||
1904 | Instead of leaving the user in the "C" locale, running the Guile REPL | |
1905 | installs the current locale. [FIXME xref?] | |
1906 | ||
99e31c32 AW |
1907 | ** Support for locale transcoding when reading from and writing to ports |
1908 | ||
1909 | Ports now have an associated character encoding, and port read and write | |
1910 | operations do conversion to and from locales automatically. Ports also | |
1911 | have an associated strategy for how to deal with locale conversion | |
1912 | failures. | |
1913 | ||
1914 | See the documentation in the manual for the four new support functions, | |
1915 | `set-port-encoding!', `port-encoding', `set-port-conversion-strategy!', | |
1916 | and `port-conversion-strategy'. | |
1917 | ||
1918 | ** String and SRFI-13 functions can operate on Unicode strings | |
1919 | ||
1920 | ** Unicode support for SRFI-14 character sets | |
1921 | ||
1922 | The default character sets are no longer locale dependent and contain | |
1923 | characters from the whole Unicode range. There is a new predefined | |
1924 | character set, `char-set:designated', which contains all assigned | |
1925 | Unicode characters. There is a new debugging function, `%char-set-dump'. | |
1926 | ||
1927 | ** Character functions operate on Unicode characters | |
1928 | ||
1929 | `char-upcase' and `char-downcase' use default Unicode casing rules. | |
1930 | Character comparisons such as `char<?' and `char-ci<?' now sort based on | |
1931 | Unicode code points. | |
108e18b1 AW |
1932 | |
1933 | ** Global variables `scm_charnames' and `scm_charnums' are removed | |
1934 | ||
1935 | These variables contained the names of control characters and were | |
1936 | used when writing characters. While these were global, they were | |
1937 | never intended to be public API. They have been replaced with private | |
1938 | functions. | |
1939 | ||
1940 | ** EBCDIC support is removed | |
1941 | ||
1942 | There was an EBCDIC compile flag that altered some of the character | |
1943 | processing. It appeared that full EBCDIC support was never completed | |
1944 | and was unmaintained. | |
1945 | ||
6bf927ab | 1946 | ** Compile-time warnings |
b0217d17 AW |
1947 | |
1948 | Guile can warn about potentially unbound free variables. Pass the | |
1949 | -Wunbound-variable on the `guile-tools compile' command line, or add | |
1950 | `#:warnings '(unbound-variable)' to your `compile' or `compile-file' | |
51cb0cca AW |
1951 | invocation. Warnings are also enabled by default for expressions entered |
1952 | at the REPL. | |
b0217d17 | 1953 | |
6cf43047 AW |
1954 | Guile can also warn when you pass the wrong number of arguments to a |
1955 | procedure, with -Warity-mismatch, or `arity-mismatch' in the | |
1956 | `#:warnings' as above. | |
1957 | ||
6bf927ab | 1958 | Other warnings include `-Wunused-variable' and `-Wunused-toplevel', to |
ef6b0e8d AW |
1959 | warn about unused local or global (top-level) variables, and `-Wformat', |
1960 | to check for various errors related to the `format' procedure. | |
6bf927ab | 1961 | |
93617170 LC |
1962 | ** A new `memoize-symbol' evaluator trap has been added. |
1963 | ||
1964 | This trap can be used for efficiently implementing a Scheme code | |
1965 | coverage. | |
fa1804e9 | 1966 | |
96b73e84 | 1967 | ** Duplicate bindings among used modules are resolved lazily. |
93617170 | 1968 | |
96b73e84 | 1969 | This slightly improves program startup times. |
fa1804e9 | 1970 | |
96b73e84 | 1971 | ** New thread cancellation and thread cleanup API |
93617170 | 1972 | |
96b73e84 | 1973 | See `cancel-thread', `set-thread-cleanup!', and `thread-cleanup'. |
fa1804e9 | 1974 | |
51cb0cca AW |
1975 | ** New threads are in `(guile-user)' by default, not `(guile)' |
1976 | ||
1977 | It used to be that a new thread entering Guile would do so in the | |
1978 | `(guile)' module, unless this was the first time Guile was initialized, | |
1979 | in which case it was `(guile-user)'. This has been fixed to have all | |
1980 | new threads unknown to Guile default to `(guile-user)'. | |
1981 | ||
b47fea09 AW |
1982 | ** New helpers: `print-exception', `set-exception-printer!' |
1983 | ||
1984 | These functions implement an extensible exception printer. Guile | |
1985 | registers printers for all of the exceptions it throws. Users may add | |
1986 | their own printers. There is also `scm_print_exception', for use by C | |
1987 | programs. Pleasantly, this allows SRFI-35 and R6RS exceptions to be | |
1988 | printed appropriately. | |
1989 | ||
4a457691 AW |
1990 | ** GOOPS dispatch in scheme |
1991 | ||
1992 | As an implementation detail, GOOPS dispatch is no longer implemented by | |
1993 | special evaluator bytecodes, but rather directly via a Scheme function | |
1994 | associated with an applicable struct. There is some VM support for the | |
1995 | underlying primitives, like `class-of'. | |
1996 | ||
1997 | This change will in the future allow users to customize generic function | |
1998 | dispatch without incurring a performance penalty, and allow us to | |
1999 | implement method combinations. | |
2000 | ||
4a457691 AW |
2001 | ** Applicable struct support |
2002 | ||
2003 | One may now make structs from Scheme that may be applied as procedures. | |
2004 | To do so, make a struct whose vtable is `<applicable-struct-vtable>'. | |
2005 | That struct will be the vtable of your applicable structs; instances of | |
2006 | that new struct are assumed to have the procedure in their first slot. | |
2007 | `<applicable-struct-vtable>' is like Common Lisp's | |
2008 | `funcallable-standard-class'. Likewise there is | |
2009 | `<applicable-struct-with-setter-vtable>', which looks for the setter in | |
2010 | the second slot. This needs to be better documented. | |
2011 | ||
29b98fb2 AW |
2012 | ** GOOPS cleanups. |
2013 | ||
2014 | GOOPS had a number of concepts that were relevant to the days of Tcl, | |
2015 | but not any more: operators and entities, mainly. These objects were | |
2016 | never documented, and it is unlikely that they were ever used. Operators | |
2017 | were a kind of generic specific to the Tcl support. Entities were | |
2018 | replaced by applicable structs, mentioned above. | |
2019 | ||
4a457691 AW |
2020 | ** New struct slot allocation: "hidden" |
2021 | ||
2022 | A hidden slot is readable and writable, but will not be initialized by a | |
2023 | call to make-struct. For example in your layout you would say "ph" | |
2024 | instead of "pw". Hidden slots are useful for adding new slots to a | |
2025 | vtable without breaking existing invocations to make-struct. | |
2026 | ||
2027 | ** eqv? not a generic | |
2028 | ||
2029 | One used to be able to extend `eqv?' as a primitive-generic, but no | |
2030 | more. Because `eqv?' is in the expansion of `case' (via `memv'), which | |
2031 | should be able to compile to static dispatch tables, it doesn't make | |
2032 | sense to allow extensions that would subvert this optimization. | |
2033 | ||
e614d375 AW |
2034 | ** `inet-ntop' and `inet-pton' are always available. |
2035 | ||
2036 | Guile now use a portable implementation of `inet_pton'/`inet_ntop', so | |
2037 | there is no more need to use `inet-aton'/`inet-ntoa'. The latter | |
2038 | functions are deprecated. | |
2039 | ||
b47fea09 AW |
2040 | ** `getopt-long' parsing errors throw to `quit', not `misc-error' |
2041 | ||
2042 | This change should inhibit backtraces on argument parsing errors. | |
2043 | `getopt-long' has been modified to print out the error that it throws | |
2044 | itself. | |
2045 | ||
51cb0cca AW |
2046 | ** New primitive: `tmpfile'. |
2047 | ||
2048 | See "File System" in the manual. | |
2049 | ||
2050 | ** Random generator state may be serialized to a datum | |
2051 | ||
2052 | `random-state->datum' will serialize a random state to a datum, which | |
2053 | may be written out, read back in later, and revivified using | |
2054 | `datum->random-state'. See "Random" in the manual, for more details. | |
2055 | ||
2056 | ** Fix random number generator on 64-bit platforms | |
2057 | ||
2058 | There was a nasty bug on 64-bit platforms in which asking for a random | |
2059 | integer with a range between 2**32 and 2**64 caused a segfault. After | |
2060 | many embarrassing iterations, this was fixed. | |
2061 | ||
5bb408cc AW |
2062 | ** Fast bit operations. |
2063 | ||
2064 | The bit-twiddling operations `ash', `logand', `logior', and `logxor' now | |
2065 | have dedicated bytecodes. Guile is not just for symbolic computation, | |
2066 | it's for number crunching too. | |
2067 | ||
4a457691 AW |
2068 | ** Faster SRFI-9 record access |
2069 | ||
2070 | SRFI-9 records are now implemented directly on top of Guile's structs, | |
2071 | and their accessors are defined in such a way that normal call-sites | |
2072 | inline to special VM opcodes, while still allowing for the general case | |
2073 | (e.g. passing a record accessor to `apply'). | |
2074 | ||
e614d375 AW |
2075 | ** R6RS block comment support |
2076 | ||
2077 | Guile now supports R6RS nested block comments. The start of a comment is | |
2078 | marked with `#|', and the end with `|#'. | |
2079 | ||
2080 | ** `guile-2' cond-expand feature | |
2081 | ||
2082 | To test if your code is running under Guile 2.0 (or its alpha releases), | |
2083 | test for the `guile-2' cond-expand feature. Like this: | |
2084 | ||
2085 | (cond-expand (guile-2 (eval-when (compile) | |
2086 | ;; This must be evaluated at compile time. | |
2087 | (fluid-set! current-reader my-reader))) | |
2088 | (guile | |
2089 | ;; Earlier versions of Guile do not have a | |
2090 | ;; separate compilation phase. | |
2091 | (fluid-set! current-reader my-reader))) | |
2092 | ||
96b73e84 | 2093 | ** New global variables: %load-compiled-path, %load-compiled-extensions |
fa1804e9 | 2094 | |
96b73e84 | 2095 | These are analogous to %load-path and %load-extensions. |
fa1804e9 | 2096 | |
18e90860 AW |
2097 | ** New fluid: `%file-port-name-canonicalization' |
2098 | ||
2099 | This fluid parameterizes the file names that are associated with file | |
2100 | ports. If %file-port-name-canonicalization is 'absolute, then file names | |
2101 | are canonicalized to be absolute paths. If it is 'relative, then the | |
2102 | name is canonicalized, but any prefix corresponding to a member of | |
2103 | `%load-path' is stripped off. Otherwise the names are passed through | |
2104 | unchanged. | |
2105 | ||
2106 | In addition, the `compile-file' and `compile-and-load' procedures bind | |
2107 | %file-port-name-canonicalization to their `#:canonicalization' keyword | |
2108 | argument, which defaults to 'relative. In this way, one might compile | |
2109 | "../module/ice-9/boot-9.scm", but the path that gets residualized into | |
2110 | the .go is "ice-9/boot-9.scm". | |
2111 | ||
96b73e84 | 2112 | ** New procedure, `make-promise' |
fa1804e9 | 2113 | |
96b73e84 | 2114 | `(make-promise (lambda () foo))' is equivalent to `(delay foo)'. |
fa1804e9 | 2115 | |
108e18b1 AW |
2116 | ** `defined?' may accept a module as its second argument |
2117 | ||
2118 | Previously it only accepted internal structures from the evaluator. | |
2119 | ||
96b73e84 | 2120 | ** New entry into %guile-build-info: `ccachedir' |
fa1804e9 | 2121 | |
96b73e84 | 2122 | ** Fix bug in `module-bound?'. |
fa1804e9 | 2123 | |
96b73e84 AW |
2124 | `module-bound?' was returning true if a module did have a local |
2125 | variable, but one that was unbound, but another imported module bound | |
2126 | the variable. This was an error, and was fixed. | |
fa1804e9 | 2127 | |
96b73e84 | 2128 | ** `(ice-9 syncase)' has been deprecated. |
fa1804e9 | 2129 | |
96b73e84 AW |
2130 | As syntax-case is available by default, importing `(ice-9 syncase)' has |
2131 | no effect, and will trigger a deprecation warning. | |
fa1804e9 | 2132 | |
b0217d17 AW |
2133 | ** New readline history functions |
2134 | ||
2135 | The (ice-9 readline) module now provides add-history, read-history, | |
2136 | write-history and clear-history, which wrap the corresponding GNU | |
2137 | History library functions. | |
2138 | ||
86d88a22 AW |
2139 | ** Removed deprecated uniform array procedures: |
2140 | dimensions->uniform-array, list->uniform-array, array-prototype | |
2141 | ||
2142 | Instead, use make-typed-array, list->typed-array, or array-type, | |
2143 | respectively. | |
2144 | ||
51cb0cca AW |
2145 | ** Deprecate the old `scm-style-repl' |
2146 | ||
2147 | The following bindings from boot-9 are now found in `(ice-9 | |
2148 | scm-style-repl)': `scm-style-repl', `error-catching-loop', | |
2149 | `error-catching-repl', `bad-throw', `scm-repl-silent' | |
2150 | `assert-repl-silence', `repl-print-unspecified', | |
2151 | `assert-repl-print-unspecified', `scm-repl-verbose', | |
2152 | `assert-repl-verbosity', `scm-repl-prompt', `set-repl-prompt!', `repl', | |
2153 | `default-pre-unwind-handler', `handle-system-error', | |
2154 | ||
2155 | The following bindings have been deprecated, with no replacement: | |
2156 | `pre-unwind-handler-dispatch'. | |
2157 | ||
2158 | The following bindings have been totally removed: | |
2159 | `before-signal-stack'. | |
2160 | ||
2161 | Deprecated forwarding shims have been installed so that users that | |
2162 | expect these bindings in the main namespace will still work, but receive | |
2163 | a deprecation warning. | |
2164 | ||
2165 | ** `set-batch-mode?!' replaced by `ensure-batch-mode!' | |
2166 | ||
2167 | "Batch mode" is a flag used to tell a program that it is not running | |
2168 | interactively. One usually turns it on after a fork. It may not be | |
2169 | turned off. `ensure-batch-mode!' deprecates the old `set-batch-mode?!', | |
2170 | because it is a better interface, as it can only turn on batch mode, not | |
2171 | turn it off. | |
2172 | ||
2173 | ** Deprecate `save-stack', `the-last-stack' | |
2174 | ||
2175 | It used to be that the way to debug programs in Guile was to capture the | |
2176 | stack at the time of error, drop back to the REPL, then debug that | |
2177 | stack. But this approach didn't compose, was tricky to get right in the | |
2178 | presence of threads, and was not very powerful. | |
2179 | ||
2180 | So `save-stack', `stack-saved?', and `the-last-stack' have been moved to | |
2181 | `(ice-9 save-stack)', with deprecated bindings left in the root module. | |
2182 | ||
2183 | ** `top-repl' has its own module | |
2184 | ||
2185 | The `top-repl' binding, called with Guile is run interactively, is now | |
2186 | is its own module, `(ice-9 top-repl)'. A deprecated forwarding shim was | |
2187 | left in the default environment. | |
2188 | ||
2189 | ** `display-error' takes a frame | |
2190 | ||
2191 | The `display-error' / `scm_display_error' helper now takes a frame as an | |
2192 | argument instead of a stack. Stacks are still supported in deprecated | |
2193 | builds. Additionally, `display-error' will again source location | |
2194 | information for the error. | |
2195 | ||
2196 | ** No more `(ice-9 debug)' | |
2197 | ||
2198 | This module had some debugging helpers that are no longer applicable to | |
2199 | the current debugging model. Importing this module will produce a | |
2200 | deprecation warning. Users should contact bug-guile for support. | |
2201 | ||
ef6b0e8d AW |
2202 | ** Remove obsolete debug-options |
2203 | ||
2204 | Removed `breakpoints', `trace', `procnames', `indent', `frames', | |
2205 | `maxdepth', and `debug' debug-options. | |
2206 | ||
2207 | ** `backtrace' debug option on by default | |
2208 | ||
2209 | Given that Guile 2.0 can always give you a backtrace, backtraces are now | |
2210 | on by default. | |
2211 | ||
2212 | ** `turn-on-debugging' deprecated | |
2213 | ||
2214 | ** Remove obsolete print-options | |
2215 | ||
2216 | The `source' and `closure-hook' print options are obsolete, and have | |
2217 | been removed. | |
2218 | ||
2219 | ** Remove obsolete read-options | |
2220 | ||
2221 | The "elisp-strings" and "elisp-vectors" read options were unused and | |
2222 | obsolete, so they have been removed. | |
2223 | ||
2224 | ** Remove eval-options and trap-options | |
2225 | ||
2226 | Eval-options and trap-options are obsolete with the new VM and | |
2227 | evaluator. | |
2228 | ||
2229 | ** Remove (ice-9 debugger) and (ice-9 debugging) | |
2230 | ||
2231 | See "Traps" and "Interactive Debugging" in the manual, for information | |
2232 | on their replacements. | |
2233 | ||
2234 | ** Remove the GDS Emacs integration | |
2235 | ||
2236 | See "Using Guile in Emacs" in the manual, for info on how we think you | |
2237 | should use Guile with Emacs. | |
2238 | ||
b0abbaa7 AW |
2239 | ** Deprecated: `lazy-catch' |
2240 | ||
2241 | `lazy-catch' was a form that captured the stack at the point of a | |
2242 | `throw', but the dynamic state at the point of the `catch'. It was a bit | |
2243 | crazy. Please change to use `catch', possibly with a throw-handler, or | |
2244 | `with-throw-handler'. | |
2245 | ||
487bacf4 AW |
2246 | ** Deprecated: primitive properties |
2247 | ||
2248 | The `primitive-make-property', `primitive-property-set!', | |
2249 | `primitive-property-ref', and `primitive-property-del!' procedures were | |
2250 | crufty and only used to implement object properties, which has a new, | |
2251 | threadsafe implementation. Use object properties or weak hash tables | |
2252 | instead. | |
2253 | ||
18e90860 AW |
2254 | ** Deprecated `@bind' syntax |
2255 | ||
2256 | `@bind' was part of an older implementation of the Emacs Lisp language, | |
2257 | and is no longer used. | |
2258 | ||
51cb0cca AW |
2259 | ** Miscellaneous other deprecations |
2260 | ||
7cd99cba AW |
2261 | `cuserid' has been deprecated, as it only returns 8 bytes of a user's |
2262 | login. Use `(passwd:name (getpwuid (geteuid)))' instead. | |
2263 | ||
487bacf4 AW |
2264 | Additionally, the procedures `apply-to-args', `has-suffix?', `scheme-file-suffix' |
2265 | `get-option', `for-next-option', `display-usage-report', | |
2266 | `transform-usage-lambda', `collect', and `set-batch-mode?!' have all | |
2267 | been deprecated. | |
2268 | ||
7cd99cba AW |
2269 | ** Add support for unbound fluids |
2270 | ||
2271 | See `make-unbound-fluid', `fluid-unset!', and `fluid-bound?' in the | |
2272 | manual. | |
2273 | ||
2274 | ** Add `variable-unset!' | |
2275 | ||
2276 | See "Variables" in the manual, for more details. | |
51cb0cca | 2277 | |
87e00370 LC |
2278 | ** Last but not least, the `λ' macro can be used in lieu of `lambda' |
2279 | ||
96b73e84 | 2280 | * Changes to the C interface |
fa1804e9 | 2281 | |
7b96f3dd LC |
2282 | ** Guile now uses libgc, the Boehm-Demers-Weiser garbage collector |
2283 | ||
2284 | The semantics of `scm_gc_malloc ()' have been changed, in a | |
2285 | backward-compatible way. A new allocation routine, | |
2286 | `scm_gc_malloc_pointerless ()', was added. | |
2287 | ||
2288 | Libgc is a conservative GC, which we hope will make interaction with C | |
2289 | code easier and less error-prone. | |
2290 | ||
487bacf4 AW |
2291 | ** New procedures: `scm_to_stringn', `scm_from_stringn' |
2292 | ** New procedures: scm_{to,from}_{utf8,latin1}_symbol{n,} | |
2293 | ** New procedures: scm_{to,from}_{utf8,utf32,latin1}_string{n,} | |
2294 | ||
2295 | These new procedures convert to and from string representations in | |
2296 | particular encodings. | |
ef6b0e8d | 2297 | |
487bacf4 AW |
2298 | Users should continue to use locale encoding for user input, user |
2299 | output, or interacting with the C library. | |
ef6b0e8d | 2300 | |
487bacf4 | 2301 | Use the Latin-1 functions for ASCII, and for literals in source code. |
ef6b0e8d | 2302 | |
487bacf4 AW |
2303 | Use UTF-8 functions for interaction with modern libraries which deal in |
2304 | UTF-8, and UTF-32 for interaction with utf32-using libraries. | |
2305 | ||
2306 | Otherwise, use scm_to_stringn or scm_from_stringn with a specific | |
2307 | encoding. | |
ef6b0e8d | 2308 | |
4a457691 AW |
2309 | ** New type definitions for `scm_t_intptr' and friends. |
2310 | ||
2311 | `SCM_T_UINTPTR_MAX', `SCM_T_INTPTR_MIN', `SCM_T_INTPTR_MAX', | |
2312 | `SIZEOF_SCM_T_BITS', `scm_t_intptr' and `scm_t_uintptr' are now | |
2313 | available to C. Have fun! | |
2314 | ||
96b73e84 | 2315 | ** The GH interface (deprecated in version 1.6, 2001) was removed. |
fa1804e9 | 2316 | |
96b73e84 | 2317 | ** Internal `scm_i_' functions now have "hidden" linkage with GCC/ELF |
fa1804e9 | 2318 | |
96b73e84 AW |
2319 | This makes these internal functions technically not callable from |
2320 | application code. | |
fa1804e9 | 2321 | |
96b73e84 AW |
2322 | ** Functions for handling `scm_option' now no longer require an argument |
2323 | indicating length of the `scm_t_option' array. | |
fa1804e9 | 2324 | |
4a457691 AW |
2325 | ** Procedures-with-setters are now implemented using applicable structs |
2326 | ||
2327 | From a user's perspective this doesn't mean very much. But if, for some | |
2328 | odd reason, you used the SCM_PROCEDURE_WITH_SETTER_P, SCM_PROCEDURE, or | |
2329 | SCM_SETTER macros, know that they're deprecated now. Also, scm_tc7_pws | |
2330 | is gone. | |
2331 | ||
2332 | ** Remove old evaluator closures | |
2333 | ||
2334 | There used to be ranges of typecodes allocated to interpreted data | |
2335 | structures, but that it no longer the case, given that interpreted | |
2336 | procedure are now just regular VM closures. As a result, there is a | |
2337 | newly free tc3, and a number of removed macros. See the ChangeLog for | |
2338 | details. | |
2339 | ||
cf8ec359 | 2340 | ** Primitive procedures are now VM trampoline procedures |
4a457691 AW |
2341 | |
2342 | It used to be that there were something like 12 different typecodes | |
2343 | allocated to primitive procedures, each with its own calling convention. | |
2344 | Now there is only one, the gsubr. This may affect user code if you were | |
2345 | defining a procedure using scm_c_make_subr rather scm_c_make_gsubr. The | |
2346 | solution is to switch to use scm_c_make_gsubr. This solution works well | |
b3da54d1 | 2347 | both with the old 1.8 and with the current 1.9 branch. |
4a457691 | 2348 | |
cf8ec359 AW |
2349 | Guile's old evaluator used to have special cases for applying "gsubrs", |
2350 | primitive procedures with specified numbers of required, optional, and | |
2351 | rest arguments. Now, however, Guile represents gsubrs as normal VM | |
2352 | procedures, with appropriate bytecode to parse out the correct number of | |
2353 | arguments, including optional and rest arguments, and then with a | |
2354 | special bytecode to apply the gsubr. | |
2355 | ||
2356 | This allows primitive procedures to appear on the VM stack, allowing | |
2357 | them to be accurately counted in profiles. Also they now have more | |
2358 | debugging information attached to them -- their number of arguments, for | |
2359 | example. In addition, the VM can completely inline the application | |
2360 | mechanics, allowing for faster primitive calls. | |
2361 | ||
2362 | However there are some changes on the C level. There is no more | |
2363 | `scm_tc7_gsubr' or `scm_tcs_subrs' typecode for primitive procedures, as | |
2364 | they are just VM procedures. Likewise the macros `SCM_GSUBR_TYPE', | |
2365 | `SCM_GSUBR_MAKTYPE', `SCM_GSUBR_REQ', `SCM_GSUBR_OPT', and | |
2366 | `SCM_GSUBR_REST' are gone, as are `SCM_SUBR_META_INFO', `SCM_SUBR_PROPS' | |
2367 | `SCM_SET_SUBR_GENERIC_LOC', and `SCM_SUBR_ARITY_TO_TYPE'. | |
2368 | ||
2369 | Perhaps more significantly, `scm_c_make_subr', | |
2370 | `scm_c_make_subr_with_generic', `scm_c_define_subr', and | |
2371 | `scm_c_define_subr_with_generic'. They all operated on subr typecodes, | |
2372 | and there are no more subr typecodes. Use the scm_c_make_gsubr family | |
2373 | instead. | |
2374 | ||
2375 | Normal users of gsubrs should not be affected, though, as the | |
2376 | scm_c_make_gsubr family still is the correct way to create primitive | |
2377 | procedures. | |
2378 | ||
2379 | ** Remove deprecated array C interfaces | |
2380 | ||
2381 | Removed the deprecated array functions `scm_i_arrayp', | |
2382 | `scm_i_array_ndim', `scm_i_array_mem', `scm_i_array_v', | |
2383 | `scm_i_array_base', `scm_i_array_dims', and the deprecated macros | |
2384 | `SCM_ARRAYP', `SCM_ARRAY_NDIM', `SCM_ARRAY_CONTP', `SCM_ARRAY_MEM', | |
2385 | `SCM_ARRAY_V', `SCM_ARRAY_BASE', and `SCM_ARRAY_DIMS'. | |
2386 | ||
2387 | ** Remove unused snarf macros | |
2388 | ||
2389 | `SCM_DEFINE1', `SCM_PRIMITIVE_GENERIC_1', `SCM_PROC1, and `SCM_GPROC1' | |
2390 | are no more. Use SCM_DEFINE or SCM_PRIMITIVE_GENERIC instead. | |
2391 | ||
cf8ec359 AW |
2392 | ** New functions: `scm_call_n', `scm_c_run_hookn' |
2393 | ||
2394 | `scm_call_n' applies to apply a function to an array of arguments. | |
2395 | `scm_c_run_hookn' runs a hook with an array of arguments. | |
2396 | ||
4a457691 AW |
2397 | ** Some SMOB types changed to have static typecodes |
2398 | ||
2399 | Fluids, dynamic states, and hash tables used to be SMOB objects, but now | |
2400 | they have statically allocated tc7 typecodes. | |
2401 | ||
2402 | ** Preparations for changing SMOB representation | |
2403 | ||
2404 | If things go right, we'll be changing the SMOB representation soon. To | |
2405 | that end, we did a lot of cleanups to calls to e.g. SCM_CELL_WORD_2(x) when | |
2406 | the code meant SCM_SMOB_DATA_2(x); user code will need similar changes | |
2407 | in the future. Code accessing SMOBs using SCM_CELL macros was never | |
2408 | correct, but until now things still worked. Users should be aware of | |
2409 | such changes. | |
fa1804e9 | 2410 | |
cf8ec359 AW |
2411 | ** Changed invocation mechanics of applicable SMOBs |
2412 | ||
2413 | Guile's old evaluator used to have special cases for applying SMOB | |
2414 | objects. Now, with the VM, when Guile sees a SMOB, it looks up a VM | |
2415 | trampoline procedure for it, and use the normal mechanics to apply the | |
2416 | trampoline. This simplifies procedure application in the normal, | |
2417 | non-SMOB case. | |
2418 | ||
2419 | The upshot is that the mechanics used to apply a SMOB are different from | |
2420 | 1.8. Descriptors no longer have `apply_0', `apply_1', `apply_2', and | |
2421 | `apply_3' functions, and the macros SCM_SMOB_APPLY_0 and friends are now | |
2422 | deprecated. Just use the scm_call_0 family of procedures. | |
2423 | ||
ef6b0e8d AW |
2424 | ** Removed support shlibs for SRFIs 1, 4, 13, 14, and 60 |
2425 | ||
2426 | Though these SRFI support libraries did expose API, they encoded a | |
2427 | strange version string into their library names. That version was never | |
2428 | programmatically exported, so there was no way people could use the | |
2429 | libs. | |
2430 | ||
2431 | This was a fortunate oversight, as it allows us to remove the need for | |
2432 | extra, needless shared libraries --- the C support code for SRFIs 4, 13, | |
2433 | and 14 was already in core --- and allow us to incrementally return the | |
2434 | SRFI implementation to Scheme. | |
2435 | ||
96b73e84 | 2436 | ** New C function: scm_module_public_interface |
a4f1c77d | 2437 | |
96b73e84 | 2438 | This procedure corresponds to Scheme's `module-public-interface'. |
24d6fae8 | 2439 | |
4a457691 AW |
2440 | ** Undeprecate `scm_the_root_module ()' |
2441 | ||
2442 | It's useful to be able to get the root module from C without doing a | |
2443 | full module lookup. | |
2444 | ||
e614d375 AW |
2445 | ** Inline vector allocation |
2446 | ||
2447 | Instead of having vectors point out into the heap for their data, their | |
2448 | data is now allocated inline to the vector object itself. The same is | |
2449 | true for bytevectors, by default, though there is an indirection | |
2450 | available which should allow for making a bytevector from an existing | |
2451 | memory region. | |
2452 | ||
4a457691 AW |
2453 | ** New struct constructors that don't involve making lists |
2454 | ||
2455 | `scm_c_make_struct' and `scm_c_make_structv' are new varargs and array | |
2456 | constructors, respectively, for structs. You might find them useful. | |
2457 | ||
2458 | ** Stack refactor | |
2459 | ||
2460 | In Guile 1.8, there were debugging frames on the C stack. Now there is | |
2461 | no more need to explicitly mark the stack in this way, because Guile has | |
2462 | a VM stack that it knows how to walk, which simplifies the C API | |
2463 | considerably. See the ChangeLog for details; the relevant interface is | |
2464 | in libguile/stacks.h. The Scheme API has not been changed significantly. | |
2465 | ||
e614d375 AW |
2466 | ** Removal of Guile's primitive object system. |
2467 | ||
2468 | There were a number of pieces in `objects.[ch]' that tried to be a | |
2469 | minimal object system, but were never documented, and were quickly | |
2470 | obseleted by GOOPS' merge into Guile proper. So `scm_make_class_object', | |
2471 | `scm_make_subclass_object', `scm_metaclass_standard', and like symbols | |
2472 | from objects.h are no more. In the very unlikely case in which these | |
2473 | were useful to you, we urge you to contact guile-devel. | |
2474 | ||
2475 | ** No future. | |
2476 | ||
2477 | Actually the future is still in the state that it was, is, and ever | |
2478 | shall be, Amen, except that `futures.c' and `futures.h' are no longer a | |
2479 | part of it. These files were experimental, never compiled, and would be | |
2480 | better implemented in Scheme anyway. In the future, that is. | |
2481 | ||
4a457691 AW |
2482 | ** Deprecate trampolines |
2483 | ||
2484 | There used to be C functions `scm_trampoline_0', `scm_trampoline_1', and | |
2485 | so on. The point was to do some precomputation on the type of the | |
2486 | procedure, then return a specialized "call" procedure. However this | |
2487 | optimization wasn't actually an optimization, so it is now deprecated. | |
2488 | Just use `scm_call_0', etc instead. | |
2489 | ||
18e90860 AW |
2490 | ** Deprecated `scm_badargsp' |
2491 | ||
2492 | This function is unused in Guile, but was part of its API. | |
2493 | ||
5bb408cc AW |
2494 | ** Better support for Lisp `nil'. |
2495 | ||
2496 | The bit representation of `nil' has been tweaked so that it is now very | |
2497 | efficient to check e.g. if a value is equal to Scheme's end-of-list or | |
2498 | Lisp's nil. Additionally there are a heap of new, specific predicates | |
b390b008 | 2499 | like scm_is_null_or_nil. |
5bb408cc | 2500 | |
139fa149 AW |
2501 | ** Better integration of Lisp `nil'. |
2502 | ||
2503 | `scm_is_boolean', `scm_is_false', and `scm_is_null' all return true now | |
2504 | for Lisp's `nil'. This shouldn't affect any Scheme code at this point, | |
2505 | but when we start to integrate more with Emacs, it is possible that we | |
2506 | break code that assumes that, for example, `(not x)' implies that `x' is | |
2507 | `eq?' to `#f'. This is not a common assumption. Refactoring affected | |
2508 | code to rely on properties instead of identities will improve code | |
2509 | correctness. See "Nil" in the manual, for more details. | |
2510 | ||
e614d375 AW |
2511 | ** Support for static allocation of strings, symbols, and subrs. |
2512 | ||
2513 | Calls to snarfing CPP macros like SCM_DEFINE macro will now allocate | |
2514 | much of their associated data as static variables, reducing Guile's | |
2515 | memory footprint. | |
2516 | ||
93617170 LC |
2517 | ** `scm_stat' has an additional argument, `exception_on_error' |
2518 | ** `scm_primitive_load_path' has an additional argument `exception_on_not_found' | |
24d6fae8 | 2519 | |
f1ce9199 LC |
2520 | ** `scm_set_port_seek' and `scm_set_port_truncate' use the `scm_t_off' type |
2521 | ||
2522 | Previously they would use the `off_t' type, which is fragile since its | |
2523 | definition depends on the application's value for `_FILE_OFFSET_BITS'. | |
2524 | ||
ba4c43dc LC |
2525 | ** The `long_long' C type, deprecated in 1.8, has been removed |
2526 | ||
86d88a22 AW |
2527 | ** Removed deprecated uniform array procedures: scm_make_uve, |
2528 | scm_array_prototype, scm_list_to_uniform_array, | |
2529 | scm_dimensions_to_uniform_array, scm_make_ra, scm_shap2ra, scm_cvref, | |
2530 | scm_ra_set_contp, scm_aind, scm_raprin1 | |
2531 | ||
2532 | These functions have been deprecated since early 2005. | |
2533 | ||
a4f1c77d | 2534 | * Changes to the distribution |
6caac03c | 2535 | |
53befeb7 NJ |
2536 | ** Guile's license is now LGPLv3+ |
2537 | ||
2538 | In other words the GNU Lesser General Public License, version 3 or | |
2539 | later (at the discretion of each person that chooses to redistribute | |
2540 | part of Guile). | |
2541 | ||
51cb0cca AW |
2542 | ** AM_SILENT_RULES |
2543 | ||
2544 | Guile's build is visually quieter, due to the use of Automake 1.11's | |
2545 | AM_SILENT_RULES. Build as `make V=1' to see all of the output. | |
2546 | ||
56664c08 AW |
2547 | ** GOOPS documentation folded into Guile reference manual |
2548 | ||
2549 | GOOPS, Guile's object system, used to be documented in separate manuals. | |
2550 | This content is now included in Guile's manual directly. | |
2551 | ||
96b73e84 | 2552 | ** `guile-config' will be deprecated in favor of `pkg-config' |
8a9faebc | 2553 | |
96b73e84 | 2554 | `guile-config' has been rewritten to get its information from |
93617170 | 2555 | `pkg-config', so this should be a transparent change. Note however that |
96b73e84 AW |
2556 | guile.m4 has yet to be modified to call pkg-config instead of |
2557 | guile-config. | |
2e77f720 | 2558 | |
54dd0ca5 LC |
2559 | ** Guile now provides `guile-2.0.pc' instead of `guile-1.8.pc' |
2560 | ||
2561 | Programs that use `pkg-config' to find Guile or one of its Autoconf | |
2562 | macros should now require `guile-2.0' instead of `guile-1.8'. | |
2563 | ||
96b73e84 | 2564 | ** New installation directory: $(pkglibdir)/1.9/ccache |
62560650 | 2565 | |
96b73e84 AW |
2566 | If $(libdir) is /usr/lib, for example, Guile will install its .go files |
2567 | to /usr/lib/guile/1.9/ccache. These files are architecture-specific. | |
89bc270d | 2568 | |
b0abbaa7 AW |
2569 | ** Parallel installability fixes |
2570 | ||
2571 | Guile now installs its header files to a effective-version-specific | |
2572 | directory, and includes the effective version (e.g. 2.0) in the library | |
2573 | name (e.g. libguile-2.0.so). | |
2574 | ||
2575 | This change should be transparent to users, who should detect Guile via | |
2576 | the guile.m4 macro, or the guile-2.0.pc pkg-config file. It will allow | |
2577 | parallel installs for multiple versions of Guile development | |
2578 | environments. | |
2579 | ||
b0217d17 AW |
2580 | ** Dynamically loadable extensions may be placed in a Guile-specific path |
2581 | ||
2582 | Before, Guile only searched the system library paths for extensions | |
2583 | (e.g. /usr/lib), which meant that the names of Guile extensions had to | |
2584 | be globally unique. Installing them to a Guile-specific extensions | |
66ad445d | 2585 | directory is cleaner. Use `pkg-config --variable=extensiondir |
b0217d17 AW |
2586 | guile-2.0' to get the location of the extensions directory. |
2587 | ||
51cb0cca AW |
2588 | ** User Scheme code may be placed in a version-specific path |
2589 | ||
2590 | Before, there was only one way to install user Scheme code to a | |
2591 | version-specific Guile directory: install to Guile's own path, | |
2592 | e.g. /usr/share/guile/2.0. The site directory, | |
2593 | e.g. /usr/share/guile/site, was unversioned. This has been changed to | |
2594 | add a version-specific site directory, e.g. /usr/share/guile/site/2.0, | |
2595 | searched before the global site directory. | |
2596 | ||
7b96f3dd LC |
2597 | ** New dependency: libgc |
2598 | ||
2599 | See http://www.hpl.hp.com/personal/Hans_Boehm/gc/, for more information. | |
2600 | ||
2601 | ** New dependency: GNU libunistring | |
32e29e24 | 2602 | |
108e18b1 | 2603 | See http://www.gnu.org/software/libunistring/, for more information. Our |
7b96f3dd | 2604 | Unicode support uses routines from libunistring. |
32e29e24 | 2605 | |
dbd9532e LC |
2606 | ** New dependency: libffi |
2607 | ||
2608 | See http://sourceware.org/libffi/, for more information. | |
2609 | ||
a4f1c77d | 2610 | |
dc686d7b | 2611 | \f |
9957b1c7 LC |
2612 | Changes in 1.8.8 (since 1.8.7) |
2613 | ||
2614 | * Bugs fixed | |
2615 | ||
2616 | ** Fix possible buffer overruns when parsing numbers | |
c15d8e6a | 2617 | ** Avoid clash with system setjmp/longjmp on IA64 |
1ff4da65 | 2618 | ** Fix `wrong type arg' exceptions with IPv6 addresses |
9957b1c7 LC |
2619 | |
2620 | \f | |
dc686d7b NJ |
2621 | Changes in 1.8.7 (since 1.8.6) |
2622 | ||
922d417b JG |
2623 | * New modules (see the manual for details) |
2624 | ||
2625 | ** `(srfi srfi-98)', an interface to access environment variables | |
2626 | ||
dc686d7b NJ |
2627 | * Bugs fixed |
2628 | ||
f5851b89 | 2629 | ** Fix compilation with `--disable-deprecated' |
dc686d7b | 2630 | ** Fix %fast-slot-ref/set!, to avoid possible segmentation fault |
cbee5075 | 2631 | ** Fix MinGW build problem caused by HAVE_STRUCT_TIMESPEC confusion |
ab878b0f | 2632 | ** Fix build problem when scm_t_timespec is different from struct timespec |
95a040cd | 2633 | ** Fix build when compiled with -Wundef -Werror |
1bcf7993 | 2634 | ** More build fixes for `alphaev56-dec-osf5.1b' (Tru64) |
5374ec9c | 2635 | ** Build fixes for `powerpc-ibm-aix5.3.0.0' (AIX 5.3) |
5c006c3f LC |
2636 | ** With GCC, always compile with `-mieee' on `alpha*' and `sh*' |
2637 | ** Better diagnose broken `(strftime "%z" ...)' in `time.test' (bug #24130) | |
fc76c08d | 2638 | ** Fix parsing of SRFI-88/postfix keywords longer than 128 characters |
40f89215 | 2639 | ** Fix reading of complex numbers where both parts are inexact decimals |
d41668fa | 2640 | |
ad5f5ada NJ |
2641 | ** Allow @ macro to work with (ice-9 syncase) |
2642 | ||
2643 | Previously, use of the @ macro in a module whose code is being | |
2644 | transformed by (ice-9 syncase) would cause an "Invalid syntax" error. | |
2645 | Now it works as you would expect (giving the value of the specified | |
2646 | module binding). | |
2647 | ||
05588a1a LC |
2648 | ** Have `scm_take_locale_symbol ()' return an interned symbol (bug #25865) |
2649 | ||
d41668fa | 2650 | \f |
8c40b75d LC |
2651 | Changes in 1.8.6 (since 1.8.5) |
2652 | ||
071bb6a8 LC |
2653 | * New features (see the manual for details) |
2654 | ||
2655 | ** New convenience function `scm_c_symbol_length ()' | |
2656 | ||
091baf9e NJ |
2657 | ** Single stepping through code from Emacs |
2658 | ||
2659 | When you use GDS to evaluate Scheme code from Emacs, you can now use | |
2660 | `C-u' to indicate that you want to single step through that code. See | |
2661 | `Evaluating Scheme Code' in the manual for more details. | |
2662 | ||
9e4db0ef LC |
2663 | ** New "guile(1)" man page! |
2664 | ||
242ebeaf LC |
2665 | * Changes to the distribution |
2666 | ||
2667 | ** Automake's `AM_MAINTAINER_MODE' is no longer used | |
2668 | ||
2669 | Thus, the `--enable-maintainer-mode' configure option is no longer | |
2670 | available: Guile is now always configured in "maintainer mode". | |
2671 | ||
e0063477 LC |
2672 | ** `ChangeLog' files are no longer updated |
2673 | ||
2674 | Instead, changes are detailed in the version control system's logs. See | |
2675 | the top-level `ChangeLog' files for details. | |
2676 | ||
2677 | ||
8c40b75d LC |
2678 | * Bugs fixed |
2679 | ||
fd2b17b9 | 2680 | ** `symbol->string' now returns a read-only string, as per R5RS |
c6333102 | 2681 | ** Fix incorrect handling of the FLAGS argument of `fold-matches' |
589d9eb8 | 2682 | ** `guile-config link' now prints `-L$libdir' before `-lguile' |
4a1db3a9 | 2683 | ** Fix memory corruption involving GOOPS' `class-redefinition' |
191e7165 | 2684 | ** Fix possible deadlock in `mutex-lock' |
95c6523b | 2685 | ** Fix build issue on Tru64 and ia64-hp-hpux11.23 (`SCM_UNPACK' macro) |
4696a666 | 2686 | ** Fix build issue on mips, mipsel, powerpc and ia64 (stack direction) |
450be18d | 2687 | ** Fix build issue on hppa2.0w-hp-hpux11.11 (`dirent64' and `readdir64_r') |
88cefbc7 | 2688 | ** Fix build issue on i386-unknown-freebsd7.0 ("break strict-aliasing rules") |
76dae881 | 2689 | ** Fix misleading output from `(help rationalize)' |
5ea8e76e | 2690 | ** Fix build failure on Debian hppa architecture (bad stack growth detection) |
1dd79792 | 2691 | ** Fix `gcd' when called with a single, negative argument. |
d8b6e191 | 2692 | ** Fix `Stack overflow' errors seen when building on some platforms |
ccf1ca4a LC |
2693 | ** Fix bug when `scm_with_guile ()' was called several times from the |
2694 | same thread | |
76350432 LC |
2695 | ** The handler of SRFI-34 `with-exception-handler' is now invoked in the |
2696 | dynamic environment of the call to `raise' | |
cb823e63 | 2697 | ** Fix potential deadlock in `make-struct' |
691343ea | 2698 | ** Fix compilation problem with libltdl from Libtool 2.2.x |
3ae3166b | 2699 | ** Fix sloppy bound checking in `string-{ref,set!}' with the empty string |
6eadcdab | 2700 | |
8c40b75d | 2701 | \f |
5305df84 LC |
2702 | Changes in 1.8.5 (since 1.8.4) |
2703 | ||
4b824aae LC |
2704 | * Infrastructure changes |
2705 | ||
2706 | ** Guile repository switched from CVS to Git | |
2707 | ||
2708 | The new repository can be accessed using | |
2709 | "git-clone git://git.sv.gnu.org/guile.git", or can be browsed on-line at | |
2710 | http://git.sv.gnu.org/gitweb/?p=guile.git . See `README' for details. | |
2711 | ||
92826dd0 LC |
2712 | ** Add support for `pkg-config' |
2713 | ||
2714 | See "Autoconf Support" in the manual for details. | |
2715 | ||
189681f5 LC |
2716 | * New modules (see the manual for details) |
2717 | ||
2718 | ** `(srfi srfi-88)' | |
2719 | ||
ef4cbc08 LC |
2720 | * New features (see the manual for details) |
2721 | ||
2722 | ** New `postfix' read option, for SRFI-88 keyword syntax | |
f5c2af4b | 2723 | ** Some I/O primitives have been inlined, which improves I/O performance |
b20ef3a6 | 2724 | ** New object-based traps infrastructure |
ef4cbc08 | 2725 | |
b20ef3a6 NJ |
2726 | This is a GOOPS-based infrastructure that builds on Guile's low-level |
2727 | evaluator trap calls and facilitates the development of debugging | |
2728 | features like single-stepping, breakpoints, tracing and profiling. | |
2729 | See the `Traps' node of the manual for details. | |
2730 | ||
2731 | ** New support for working on Guile code from within Emacs | |
2732 | ||
2733 | Guile now incorporates the `GDS' library (previously distributed | |
2734 | separately) for working on Guile code from within Emacs. See the | |
2735 | `Using Guile In Emacs' node of the manual for details. | |
2736 | ||
5305df84 LC |
2737 | * Bugs fixed |
2738 | ||
e27d2495 LC |
2739 | ** `scm_add_slot ()' no longer segfaults (fixes bug #22369) |
2740 | ** Fixed `(ice-9 match)' for patterns like `((_ ...) ...)' | |
2741 | ||
2742 | Previously, expressions like `(match '((foo) (bar)) (((_ ...) ...) #t))' | |
2743 | would trigger an unbound variable error for `match:andmap'. | |
2744 | ||
62c5382b LC |
2745 | ** `(oop goops describe)' now properly provides the `describe' feature |
2746 | ** Fixed `args-fold' from `(srfi srfi-37)' | |
2747 | ||
2748 | Previously, parsing short option names of argument-less options would | |
2749 | lead to a stack overflow. | |
2750 | ||
816e3edf | 2751 | ** `(srfi srfi-35)' is now visible through `cond-expand' |
61b6542a | 2752 | ** Fixed type-checking for the second argument of `eval' |
0fb11ae4 | 2753 | ** Fixed type-checking for SRFI-1 `partition' |
f1c212b1 LC |
2754 | ** Fixed `struct-ref' and `struct-set!' on "light structs" |
2755 | ** Honor struct field access rights in GOOPS | |
be10cba8 | 2756 | ** Changed the storage strategy of source properties, which fixes a deadlock |
979eade6 | 2757 | ** Allow compilation of Guile-using programs in C99 mode with GCC 4.3 and later |
bfb64eb4 | 2758 | ** Fixed build issue for GNU/Linux on IA64 |
fa80e280 | 2759 | ** Fixed build issues on NetBSD 1.6 |
a2c25234 | 2760 | ** Fixed build issue on Solaris 2.10 x86_64 |
3f520967 | 2761 | ** Fixed build issue with DEC/Compaq/HP's compiler |
c2ad98ad LC |
2762 | ** Fixed `scm_from_complex_double' build issue on FreeBSD |
2763 | ** Fixed `alloca' build issue on FreeBSD 6 | |
a7286720 | 2764 | ** Removed use of non-portable makefile constructs |
535b3592 | 2765 | ** Fixed shadowing of libc's <random.h> on Tru64, which broke compilation |
eedcb08a | 2766 | ** Make sure all tests honor `$TMPDIR' |
5305df84 LC |
2767 | |
2768 | \f | |
d41668fa LC |
2769 | Changes in 1.8.4 (since 1.8.3) |
2770 | ||
2771 | * Bugs fixed | |
2772 | ||
2773 | ** CR (ASCII 0x0d) is (again) recognized as a token delimiter by the reader | |
6e14de7d NJ |
2774 | ** Fixed a segmentation fault which occurred when displaying the |
2775 | backtrace of a stack with a promise object (made by `delay') in it. | |
7d1fc872 | 2776 | ** Make `accept' leave guile mode while blocking |
693758d5 | 2777 | ** `scm_c_read ()' and `scm_c_write ()' now type-check their port argument |
378cc645 | 2778 | ** Fixed a build problem on AIX (use of func_data identifier) |
15bd90ea NJ |
2779 | ** Fixed a segmentation fault which occurred when hashx-ref or hashx-set! was |
2780 | called with an associator proc that returns neither a pair nor #f. | |
3ac8359a | 2781 | ** Secondary threads now always return a valid module for (current-module). |
d05bcb2e NJ |
2782 | ** Avoid MacOS build problems caused by incorrect combination of "64" |
2783 | system and library calls. | |
9a6fac59 | 2784 | ** `guile-snarf' now honors `$TMPDIR' |
25a640ca | 2785 | ** `guile-config compile' now reports CPPFLAGS used at compile-time |
7f74cf9a | 2786 | ** Fixed build with Sun Studio (Solaris 9) |
4a19ed04 NJ |
2787 | ** Fixed wrong-type-arg errors when creating zero length SRFI-4 |
2788 | uniform vectors on AIX. | |
86a597f8 | 2789 | ** Fixed a deadlock that occurs upon GC with multiple threads. |
4b26c03e | 2790 | ** Fixed compile problem with GCC on Solaris and AIX (use of _Complex_I) |
d4a00708 | 2791 | ** Fixed autotool-derived build problems on AIX 6.1. |
9a6fac59 | 2792 | ** Fixed NetBSD/alpha support |
b226295a | 2793 | ** Fixed MacOS build problem caused by use of rl_get_keymap(_name) |
7d1fc872 LC |
2794 | |
2795 | * New modules (see the manual for details) | |
2796 | ||
2797 | ** `(srfi srfi-69)' | |
d41668fa | 2798 | |
b226295a NJ |
2799 | * Documentation fixes and improvements |
2800 | ||
2801 | ** Removed premature breakpoint documentation | |
2802 | ||
2803 | The features described are not available in the series of 1.8.x | |
2804 | releases, so the documentation was misleading and has been removed. | |
2805 | ||
2806 | ** More about Guile's default *random-state* variable | |
2807 | ||
2808 | ** GOOPS: more about how to use `next-method' | |
2809 | ||
d3cf93bc NJ |
2810 | * Changes to the distribution |
2811 | ||
2812 | ** Corrected a few files that referred incorrectly to the old GPL + special exception licence | |
2813 | ||
2814 | In fact Guile since 1.8.0 has been licensed with the GNU Lesser | |
2815 | General Public License, and the few incorrect files have now been | |
2816 | fixed to agree with the rest of the Guile distribution. | |
2817 | ||
5e42b8e7 NJ |
2818 | ** Removed unnecessary extra copies of COPYING* |
2819 | ||
2820 | The distribution now contains a single COPYING.LESSER at its top level. | |
2821 | ||
a4f1c77d | 2822 | \f |
d4c38221 LC |
2823 | Changes in 1.8.3 (since 1.8.2) |
2824 | ||
2825 | * New modules (see the manual for details) | |
2826 | ||
f50ca8da | 2827 | ** `(srfi srfi-35)' |
d4c38221 LC |
2828 | ** `(srfi srfi-37)' |
2829 | ||
e08f3f7a LC |
2830 | * Bugs fixed |
2831 | ||
dc061a74 | 2832 | ** The `(ice-9 slib)' module now works as expected |
e08f3f7a | 2833 | ** Expressions like "(set! 'x #t)" no longer yield a crash |
d7c0c26d | 2834 | ** Warnings about duplicate bindings now go to stderr |
1ac5fb45 | 2835 | ** A memory leak in `make-socket-address' was fixed |
f43f3620 | 2836 | ** Alignment issues (e.g., on SPARC) in network routines were fixed |
29776e85 | 2837 | ** A threading issue that showed up at least on NetBSD was fixed |
66302618 | 2838 | ** Build problems on Solaris and IRIX fixed |
e08f3f7a | 2839 | |
1fdd8ffa LC |
2840 | * Implementation improvements |
2841 | ||
7ff6c169 | 2842 | ** The reader is now faster, which reduces startup time |
1fdd8ffa LC |
2843 | ** Procedures returned by `record-accessor' and `record-modifier' are faster |
2844 | ||
d4c38221 | 2845 | \f |
45c0ff10 KR |
2846 | Changes in 1.8.2 (since 1.8.1): |
2847 | ||
2848 | * New procedures (see the manual for details) | |
2849 | ||
2850 | ** set-program-arguments | |
b3aa4626 | 2851 | ** make-vtable |
45c0ff10 | 2852 | |
9320e933 LC |
2853 | * Incompatible changes |
2854 | ||
2855 | ** The body of a top-level `define' no longer sees the binding being created | |
2856 | ||
2857 | In a top-level `define', the binding being created is no longer visible | |
2858 | from the `define' body. This breaks code like | |
2859 | "(define foo (begin (set! foo 1) (+ foo 1)))", where `foo' is now | |
2860 | unbound in the body. However, such code was not R5RS-compliant anyway, | |
2861 | per Section 5.2.1. | |
2862 | ||
45c0ff10 KR |
2863 | * Bugs fixed |
2864 | ||
2865 | ** Fractions were not `equal?' if stored in unreduced form. | |
2866 | (A subtle problem, since printing a value reduced it, making it work.) | |
2867 | ** srfi-60 `copy-bit' failed on 64-bit systems | |
2868 | ** "guile --use-srfi" option at the REPL can replace core functions | |
2869 | (Programs run with that option were ok, but in the interactive REPL | |
2870 | the core bindings got priority, preventing SRFI replacements or | |
2871 | extensions.) | |
2872 | ** `regexp-exec' doesn't abort() on #\nul in the input or bad flags arg | |
df449722 | 2873 | ** `kill' on mingw throws an error for a PID other than oneself |
45c0ff10 KR |
2874 | ** Procedure names are attached to procedure-with-setters |
2875 | ** Array read syntax works with negative lower bound | |
2876 | ** `array-in-bounds?' fix if an array has different lower bounds on each index | |
2877 | ** `*' returns exact 0 for "(* inexact 0)" | |
2878 | This follows what it always did for "(* 0 inexact)". | |
c122500a | 2879 | ** SRFI-19: Value returned by `(current-time time-process)' was incorrect |
0867f7ba | 2880 | ** SRFI-19: `date->julian-day' did not account for timezone offset |
a1ef7406 | 2881 | ** `ttyname' no longer crashes when passed a non-tty argument |
27782696 | 2882 | ** `inet-ntop' no longer crashes on SPARC when passed an `AF_INET' address |
0867f7ba | 2883 | ** Small memory leaks have been fixed in `make-fluid' and `add-history' |
b1f57ea4 | 2884 | ** GOOPS: Fixed a bug in `method-more-specific?' |
45c0ff10 | 2885 | ** Build problems on Solaris fixed |
df449722 LC |
2886 | ** Build problems on HP-UX IA64 fixed |
2887 | ** Build problems on MinGW fixed | |
45c0ff10 KR |
2888 | |
2889 | \f | |
a4f1c77d KR |
2890 | Changes in 1.8.1 (since 1.8.0): |
2891 | ||
8ab3d8a0 | 2892 | * LFS functions are now used to access 64-bit files on 32-bit systems. |
a4f1c77d | 2893 | |
8ab3d8a0 | 2894 | * New procedures (see the manual for details) |
4f416616 | 2895 | |
8ab3d8a0 KR |
2896 | ** primitive-_exit - [Scheme] the-root-module |
2897 | ** scm_primitive__exit - [C] | |
2898 | ** make-completion-function - [Scheme] (ice-9 readline) | |
2899 | ** scm_c_locale_stringn_to_number - [C] | |
2900 | ** scm_srfi1_append_reverse [C] | |
2901 | ** scm_srfi1_append_reverse_x [C] | |
2902 | ** scm_log - [C] | |
2903 | ** scm_log10 - [C] | |
2904 | ** scm_exp - [C] | |
2905 | ** scm_sqrt - [C] | |
2906 | ||
2907 | * Bugs fixed | |
2908 | ||
2909 | ** Build problems have been fixed on MacOS, SunOS, and QNX. | |
af4f8612 | 2910 | |
b3aa4626 KR |
2911 | ** `strftime' fix sign of %z timezone offset. |
2912 | ||
534cd148 | 2913 | ** A one-dimensional array can now be 'equal?' to a vector. |
8ab3d8a0 | 2914 | |
ad97642e | 2915 | ** Structures, records, and SRFI-9 records can now be compared with `equal?'. |
af4f8612 | 2916 | |
8ab3d8a0 KR |
2917 | ** SRFI-14 standard char sets are recomputed upon a successful `setlocale'. |
2918 | ||
2919 | ** `record-accessor' and `record-modifier' now have strict type checks. | |
2920 | ||
2921 | Record accessor and modifier procedures now throw an error if the | |
2922 | record type of the record they're given is not the type expected. | |
2923 | (Previously accessors returned #f and modifiers silently did nothing). | |
2924 | ||
2925 | ** It is now OK to use both autoload and use-modules on a given module. | |
2926 | ||
2927 | ** `apply' checks the number of arguments more carefully on "0 or 1" funcs. | |
2928 | ||
2929 | Previously there was no checking on primatives like make-vector that | |
2930 | accept "one or two" arguments. Now there is. | |
2931 | ||
2932 | ** The srfi-1 assoc function now calls its equality predicate properly. | |
2933 | ||
2934 | Previously srfi-1 assoc would call the equality predicate with the key | |
2935 | last. According to the SRFI, the key should be first. | |
2936 | ||
2937 | ** A bug in n-par-for-each and n-for-each-par-map has been fixed. | |
2938 | ||
2939 | ** The array-set! procedure no longer segfaults when given a bit vector. | |
2940 | ||
2941 | ** Bugs in make-shared-array have been fixed. | |
2942 | ||
2943 | ** string<? and friends now follow char<? etc order on 8-bit chars. | |
2944 | ||
2945 | ** The format procedure now handles inf and nan values for ~f correctly. | |
2946 | ||
2947 | ** exact->inexact should no longer overflow when given certain large fractions. | |
2948 | ||
2949 | ** srfi-9 accessor and modifier procedures now have strict record type checks. | |
a4f1c77d | 2950 | |
8ab3d8a0 | 2951 | This matches the srfi-9 specification. |
a4f1c77d | 2952 | |
8ab3d8a0 | 2953 | ** (ice-9 ftw) procedures won't ignore different files with same inode number. |
a4f1c77d | 2954 | |
8ab3d8a0 KR |
2955 | Previously the (ice-9 ftw) procedures would ignore any file that had |
2956 | the same inode number as a file they had already seen, even if that | |
2957 | file was on a different device. | |
4f416616 KR |
2958 | |
2959 | \f | |
8ab3d8a0 | 2960 | Changes in 1.8.0 (changes since the 1.6.x series): |
ee0c7345 | 2961 | |
4e250ded MV |
2962 | * Changes to the distribution |
2963 | ||
eff2965e MV |
2964 | ** Guile is now licensed with the GNU Lesser General Public License. |
2965 | ||
77e51fd6 MV |
2966 | ** The manual is now licensed with the GNU Free Documentation License. |
2967 | ||
e2d0a649 RB |
2968 | ** Guile now requires GNU MP (http://swox.com/gmp). |
2969 | ||
2970 | Guile now uses the GNU MP library for arbitrary precision arithmetic. | |
e2d0a649 | 2971 | |
5ebbe4ef RB |
2972 | ** Guile now has separate private and public configuration headers. |
2973 | ||
b0d10ba6 MV |
2974 | That is, things like HAVE_STRING_H no longer leak from Guile's |
2975 | headers. | |
5ebbe4ef RB |
2976 | |
2977 | ** Guile now provides and uses an "effective" version number. | |
b2cbe8d8 RB |
2978 | |
2979 | Guile now provides scm_effective_version and effective-version | |
2980 | functions which return the "effective" version number. This is just | |
2981 | the normal full version string without the final micro-version number, | |
a4f1c77d | 2982 | so the current effective-version is "1.8". The effective version |
b2cbe8d8 RB |
2983 | should remain unchanged during a stable series, and should be used for |
2984 | items like the versioned share directory name | |
a4f1c77d | 2985 | i.e. /usr/share/guile/1.8. |
b2cbe8d8 RB |
2986 | |
2987 | Providing an unchanging version number during a stable release for | |
2988 | things like the versioned share directory can be particularly | |
2989 | important for Guile "add-on" packages, since it provides a directory | |
2990 | that they can install to that won't be changed out from under them | |
2991 | with each micro release during a stable series. | |
2992 | ||
8d54e73a | 2993 | ** Thread implementation has changed. |
f0b4d944 MV |
2994 | |
2995 | When you configure "--with-threads=null", you will get the usual | |
2996 | threading API (call-with-new-thread, make-mutex, etc), but you can't | |
429d88d4 MV |
2997 | actually create new threads. Also, "--with-threads=no" is now |
2998 | equivalent to "--with-threads=null". This means that the thread API | |
2999 | is always present, although you might not be able to create new | |
3000 | threads. | |
f0b4d944 | 3001 | |
8d54e73a MV |
3002 | When you configure "--with-threads=pthreads" or "--with-threads=yes", |
3003 | you will get threads that are implemented with the portable POSIX | |
3004 | threads. These threads can run concurrently (unlike the previous | |
3005 | "coop" thread implementation), but need to cooperate for things like | |
a558cc63 | 3006 | the GC. |
f0b4d944 | 3007 | |
8d54e73a MV |
3008 | The default is "pthreads", unless your platform doesn't have pthreads, |
3009 | in which case "null" threads are used. | |
2902a459 | 3010 | |
a6d75e53 MV |
3011 | See the manual for details, nodes "Initialization", "Multi-Threading", |
3012 | "Blocking", and others. | |
a558cc63 | 3013 | |
f74bdbd3 MV |
3014 | ** There is the new notion of 'discouraged' features. |
3015 | ||
3016 | This is a milder form of deprecation. | |
3017 | ||
3018 | Things that are discouraged should not be used in new code, but it is | |
3019 | OK to leave them in old code for now. When a discouraged feature is | |
3020 | used, no warning message is printed like there is for 'deprecated' | |
3021 | features. Also, things that are merely discouraged are nevertheless | |
3022 | implemented efficiently, while deprecated features can be very slow. | |
3023 | ||
3024 | You can omit discouraged features from libguile by configuring it with | |
3025 | the '--disable-discouraged' option. | |
3026 | ||
3027 | ** Deprecation warnings can be controlled at run-time. | |
3028 | ||
3029 | (debug-enable 'warn-deprecated) switches them on and (debug-disable | |
3030 | 'warn-deprecated) switches them off. | |
3031 | ||
0f24e75b | 3032 | ** Support for SRFI 61, extended cond syntax for multiple values has |
a81d0de1 MV |
3033 | been added. |
3034 | ||
3035 | This SRFI is always available. | |
3036 | ||
f7fb2f39 | 3037 | ** Support for require-extension, SRFI-55, has been added. |
9a5fc8c2 | 3038 | |
f7fb2f39 RB |
3039 | The SRFI-55 special form `require-extension' has been added. It is |
3040 | available at startup, and provides a portable way to load Scheme | |
3041 | extensions. SRFI-55 only requires support for one type of extension, | |
3042 | "srfi"; so a set of SRFIs may be loaded via (require-extension (srfi 1 | |
3043 | 13 14)). | |
3044 | ||
3045 | ** New module (srfi srfi-26) provides support for `cut' and `cute'. | |
3046 | ||
3047 | The (srfi srfi-26) module is an implementation of SRFI-26 which | |
3048 | provides the `cut' and `cute' syntax. These may be used to specialize | |
3049 | parameters without currying. | |
9a5fc8c2 | 3050 | |
f5d54eb7 RB |
3051 | ** New module (srfi srfi-31) |
3052 | ||
3053 | This is an implementation of SRFI-31 which provides a special form | |
3054 | `rec' for recursive evaluation. | |
3055 | ||
7b1574ed MV |
3056 | ** The modules (srfi srfi-13), (srfi srfi-14) and (srfi srfi-4) have |
3057 | been merged with the core, making their functionality always | |
3058 | available. | |
c5080b51 | 3059 | |
ce7c0293 MV |
3060 | The modules are still available, tho, and you could use them together |
3061 | with a renaming import, for example. | |
c5080b51 | 3062 | |
6191ccec | 3063 | ** Guile no longer includes its own version of libltdl. |
4e250ded | 3064 | |
6191ccec | 3065 | The official version is good enough now. |
4e250ded | 3066 | |
ae7ded56 MV |
3067 | ** The --enable-htmldoc option has been removed from 'configure'. |
3068 | ||
3069 | Support for translating the documentation into HTML is now always | |
3070 | provided. Use 'make html'. | |
3071 | ||
0f24e75b MV |
3072 | ** New module (ice-9 serialize): |
3073 | ||
3074 | (serialize FORM1 ...) and (parallelize FORM1 ...) are useful when you | |
3075 | don't trust the thread safety of most of your program, but where you | |
3076 | have some section(s) of code which you consider can run in parallel to | |
3077 | other sections. See ice-9/serialize.scm for more information. | |
3078 | ||
c34e5780 MV |
3079 | ** The configure option '--disable-arrays' has been removed. |
3080 | ||
3081 | Support for arrays and uniform numeric arrays is now always included | |
3082 | in Guile. | |
3083 | ||
328dc9a3 | 3084 | * Changes to the stand-alone interpreter |
f12ef3fd | 3085 | |
3ece39d6 MV |
3086 | ** New command line option `-L'. |
3087 | ||
3088 | This option adds a directory to the front of the load path. | |
3089 | ||
f12ef3fd MV |
3090 | ** New command line option `--no-debug'. |
3091 | ||
3092 | Specifying `--no-debug' on the command line will keep the debugging | |
3093 | evaluator turned off, even for interactive sessions. | |
3094 | ||
3095 | ** User-init file ~/.guile is now loaded with the debugging evaluator. | |
3096 | ||
3097 | Previously, the normal evaluator would have been used. Using the | |
3098 | debugging evaluator gives better error messages. | |
3099 | ||
aff7e166 MV |
3100 | ** The '-e' option now 'read's its argument. |
3101 | ||
3102 | This is to allow the new '(@ MODULE-NAME VARIABLE-NAME)' construct to | |
3103 | be used with '-e'. For example, you can now write a script like | |
3104 | ||
3105 | #! /bin/sh | |
3106 | exec guile -e '(@ (demo) main)' -s "$0" "$@" | |
3107 | !# | |
3108 | ||
3109 | (define-module (demo) | |
3110 | :export (main)) | |
3111 | ||
3112 | (define (main args) | |
3113 | (format #t "Demo: ~a~%" args)) | |
3114 | ||
3115 | ||
f12ef3fd MV |
3116 | * Changes to Scheme functions and syntax |
3117 | ||
930888e8 MV |
3118 | ** Guardians have changed back to their original semantics |
3119 | ||
3120 | Guardians now behave like described in the paper by Dybvig et al. In | |
3121 | particular, they no longer make guarantees about the order in which | |
3122 | they return objects, and they can no longer be greedy. | |
3123 | ||
3124 | They no longer drop cyclic data structures. | |
3125 | ||
3126 | The C function scm_make_guardian has been changed incompatibly and no | |
3127 | longer takes the 'greedy_p' argument. | |
3128 | ||
87bdbdbc MV |
3129 | ** New function hashx-remove! |
3130 | ||
3131 | This function completes the set of 'hashx' functions. | |
3132 | ||
a558cc63 MV |
3133 | ** The concept of dynamic roots has been factored into continuation |
3134 | barriers and dynamic states. | |
3135 | ||
3136 | Each thread has a current dynamic state that carries the values of the | |
3137 | fluids. You can create and copy dynamic states and use them as the | |
3138 | second argument for 'eval'. See "Fluids and Dynamic States" in the | |
3139 | manual. | |
3140 | ||
3141 | To restrict the influence that captured continuations can have on the | |
3142 | control flow, you can errect continuation barriers. See "Continuation | |
3143 | Barriers" in the manual. | |
3144 | ||
3145 | The function call-with-dynamic-root now essentially temporarily | |
3146 | installs a new dynamic state and errects a continuation barrier. | |
3147 | ||
a2b6a0e7 MV |
3148 | ** The default load path no longer includes "." at the end. |
3149 | ||
3150 | Automatically loading modules from the current directory should not | |
3151 | happen by default. If you want to allow it in a more controlled | |
3152 | manner, set the environment variable GUILE_LOAD_PATH or the Scheme | |
3153 | variable %load-path. | |
3154 | ||
7b1574ed MV |
3155 | ** The uniform vector and array support has been overhauled. |
3156 | ||
3157 | It now complies with SRFI-4 and the weird prototype based uniform | |
3158 | array creation has been deprecated. See the manual for more details. | |
3159 | ||
d233b123 MV |
3160 | Some non-compatible changes have been made: |
3161 | - characters can no longer be stored into byte arrays. | |
0f24e75b MV |
3162 | - strings and bit vectors are no longer considered to be uniform numeric |
3163 | vectors. | |
3167d5e4 MV |
3164 | - array-rank throws an error for non-arrays instead of returning zero. |
3165 | - array-ref does no longer accept non-arrays when no indices are given. | |
d233b123 MV |
3166 | |
3167 | There is the new notion of 'generalized vectors' and corresponding | |
3168 | procedures like 'generalized-vector-ref'. Generalized vectors include | |
c34e5780 | 3169 | strings, bitvectors, ordinary vectors, and uniform numeric vectors. |
d233b123 | 3170 | |
a558cc63 MV |
3171 | Arrays use generalized vectors as their storage, so that you still |
3172 | have arrays of characters, bits, etc. However, uniform-array-read! | |
3173 | and uniform-array-write can no longer read/write strings and | |
3174 | bitvectors. | |
bb9f50ae | 3175 | |
ce7c0293 MV |
3176 | ** There is now support for copy-on-write substrings, mutation-sharing |
3177 | substrings and read-only strings. | |
3ff9283d | 3178 | |
ce7c0293 MV |
3179 | Three new procedures are related to this: substring/shared, |
3180 | substring/copy, and substring/read-only. See the manual for more | |
3181 | information. | |
3182 | ||
6a1d27ea MV |
3183 | ** Backtraces will now highlight the value that caused the error. |
3184 | ||
3185 | By default, these values are enclosed in "{...}", such as in this | |
3186 | example: | |
3187 | ||
3188 | guile> (car 'a) | |
3189 | ||
3190 | Backtrace: | |
3191 | In current input: | |
3192 | 1: 0* [car {a}] | |
3193 | ||
3194 | <unnamed port>:1:1: In procedure car in expression (car (quote a)): | |
3195 | <unnamed port>:1:1: Wrong type (expecting pair): a | |
3196 | ABORT: (wrong-type-arg) | |
3197 | ||
3198 | The prefix and suffix used for highlighting can be set via the two new | |
3199 | printer options 'highlight-prefix' and 'highlight-suffix'. For | |
3200 | example, putting this into ~/.guile will output the bad value in bold | |
3201 | on an ANSI terminal: | |
3202 | ||
3203 | (print-set! highlight-prefix "\x1b[1m") | |
3204 | (print-set! highlight-suffix "\x1b[22m") | |
3205 | ||
3206 | ||
8dbafacd MV |
3207 | ** 'gettext' support for internationalization has been added. |
3208 | ||
3209 | See the manual for details. | |
3210 | ||
aff7e166 MV |
3211 | ** New syntax '@' and '@@': |
3212 | ||
3213 | You can now directly refer to variables exported from a module by | |
3214 | writing | |
3215 | ||
3216 | (@ MODULE-NAME VARIABLE-NAME) | |
3217 | ||
3218 | For example (@ (ice-9 pretty-print) pretty-print) will directly access | |
3219 | the pretty-print variable exported from the (ice-9 pretty-print) | |
3220 | module. You don't need to 'use' that module first. You can also use | |
b0d10ba6 | 3221 | '@' as a target of 'set!', as in (set! (@ mod var) val). |
aff7e166 MV |
3222 | |
3223 | The related syntax (@@ MODULE-NAME VARIABLE-NAME) works just like '@', | |
3224 | but it can also access variables that have not been exported. It is | |
3225 | intended only for kluges and temporary fixes and for debugging, not | |
3226 | for ordinary code. | |
3227 | ||
aef0bdb4 MV |
3228 | ** Keyword syntax has been made more disciplined. |
3229 | ||
3230 | Previously, the name of a keyword was read as a 'token' but printed as | |
3231 | a symbol. Now, it is read as a general Scheme datum which must be a | |
3232 | symbol. | |
3233 | ||
3234 | Previously: | |
3235 | ||
3236 | guile> #:12 | |
3237 | #:#{12}# | |
3238 | guile> #:#{12}# | |
3239 | #:#{\#{12}\#}# | |
3240 | guile> #:(a b c) | |
3241 | #:#{}# | |
3242 | ERROR: In expression (a b c): | |
3243 | Unbound variable: a | |
3244 | guile> #: foo | |
3245 | #:#{}# | |
3246 | ERROR: Unbound variable: foo | |
3247 | ||
3248 | Now: | |
3249 | ||
3250 | guile> #:12 | |
3251 | ERROR: Wrong type (expecting symbol): 12 | |
3252 | guile> #:#{12}# | |
3253 | #:#{12}# | |
3254 | guile> #:(a b c) | |
3255 | ERROR: Wrong type (expecting symbol): (a b c) | |
3256 | guile> #: foo | |
3257 | #:foo | |
3258 | ||
227eafdb MV |
3259 | ** The printing of symbols that might look like keywords can be |
3260 | controlled. | |
3261 | ||
3262 | The new printer option 'quote-keywordish-symbols' controls how symbols | |
3263 | are printed that have a colon as their first or last character. The | |
3264 | default now is to only quote a symbol with #{...}# when the read | |
3265 | option 'keywords' is not '#f'. Thus: | |
3266 | ||
3267 | guile> (define foo (string->symbol ":foo")) | |
3268 | guile> (read-set! keywords #f) | |
3269 | guile> foo | |
3270 | :foo | |
3271 | guile> (read-set! keywords 'prefix) | |
3272 | guile> foo | |
3273 | #{:foo}# | |
3274 | guile> (print-set! quote-keywordish-symbols #f) | |
3275 | guile> foo | |
3276 | :foo | |
3277 | ||
1363e3e7 KR |
3278 | ** 'while' now provides 'break' and 'continue' |
3279 | ||
3280 | break and continue were previously bound in a while loop, but not | |
3281 | documented, and continue didn't quite work properly. The undocumented | |
3282 | parameter to break which gave a return value for the while has been | |
3283 | dropped. | |
3284 | ||
570b5b14 MV |
3285 | ** 'call-with-current-continuation' is now also available under the name |
3286 | 'call/cc'. | |
3287 | ||
b0d10ba6 | 3288 | ** The module system now checks for duplicate bindings. |
7b07e5ef | 3289 | |
fe6ee052 MD |
3290 | The module system now can check for name conflicts among imported |
3291 | bindings. | |
f595ccfe | 3292 | |
b0d10ba6 | 3293 | The behavior can be controlled by specifying one or more 'duplicates' |
fe6ee052 MD |
3294 | handlers. For example, to make Guile return an error for every name |
3295 | collision, write: | |
7b07e5ef MD |
3296 | |
3297 | (define-module (foo) | |
3298 | :use-module (bar) | |
3299 | :use-module (baz) | |
fe6ee052 | 3300 | :duplicates check) |
f595ccfe | 3301 | |
fe6ee052 MD |
3302 | The new default behavior of the module system when a name collision |
3303 | has been detected is to | |
3304 | ||
3305 | 1. Give priority to bindings marked as a replacement. | |
6496a663 | 3306 | 2. Issue a warning (different warning if overriding core binding). |
fe6ee052 MD |
3307 | 3. Give priority to the last encountered binding (this corresponds to |
3308 | the old behavior). | |
3309 | ||
3310 | If you want the old behavior back without replacements or warnings you | |
3311 | can add the line: | |
f595ccfe | 3312 | |
70a9dc9c | 3313 | (default-duplicate-binding-handler 'last) |
7b07e5ef | 3314 | |
fe6ee052 | 3315 | to your .guile init file. |
7b07e5ef | 3316 | |
f595ccfe MD |
3317 | ** New define-module option: :replace |
3318 | ||
3319 | :replace works as :export, but, in addition, marks the binding as a | |
3320 | replacement. | |
3321 | ||
3322 | A typical example is `format' in (ice-9 format) which is a replacement | |
3323 | for the core binding `format'. | |
7b07e5ef | 3324 | |
70da0033 MD |
3325 | ** Adding prefixes to imported bindings in the module system |
3326 | ||
3327 | There is now a new :use-module option :prefix. It can be used to add | |
3328 | a prefix to all imported bindings. | |
3329 | ||
3330 | (define-module (foo) | |
3331 | :use-module ((bar) :prefix bar:)) | |
3332 | ||
3333 | will import all bindings exported from bar, but rename them by adding | |
3334 | the prefix `bar:'. | |
3335 | ||
b0d10ba6 MV |
3336 | ** Conflicting generic functions can be automatically merged. |
3337 | ||
3338 | When two imported bindings conflict and they are both generic | |
3339 | functions, the two functions can now be merged automatically. This is | |
3340 | activated with the 'duplicates' handler 'merge-generics'. | |
3341 | ||
b2cbe8d8 RB |
3342 | ** New function: effective-version |
3343 | ||
3344 | Returns the "effective" version number. This is just the normal full | |
3345 | version string without the final micro-version number. See "Changes | |
3346 | to the distribution" above. | |
3347 | ||
382053e9 | 3348 | ** New threading functions: parallel, letpar, par-map, and friends |
dbe30084 | 3349 | |
382053e9 KR |
3350 | These are convenient ways to run calculations in parallel in new |
3351 | threads. See "Parallel forms" in the manual for details. | |
359aab24 | 3352 | |
e2d820a1 MV |
3353 | ** New function 'try-mutex'. |
3354 | ||
3355 | This function will attempt to lock a mutex but will return immediately | |
0f24e75b | 3356 | instead of blocking and indicate failure. |
e2d820a1 MV |
3357 | |
3358 | ** Waiting on a condition variable can have a timeout. | |
3359 | ||
0f24e75b | 3360 | The function 'wait-condition-variable' now takes a third, optional |
e2d820a1 MV |
3361 | argument that specifies the point in time where the waiting should be |
3362 | aborted. | |
3363 | ||
3364 | ** New function 'broadcast-condition-variable'. | |
3365 | ||
5e405a60 MV |
3366 | ** New functions 'all-threads' and 'current-thread'. |
3367 | ||
3368 | ** Signals and system asyncs work better with threads. | |
3369 | ||
3370 | The function 'sigaction' now takes a fourth, optional, argument that | |
3371 | specifies the thread that the handler should run in. When the | |
3372 | argument is omitted, the handler will run in the thread that called | |
3373 | 'sigaction'. | |
3374 | ||
3375 | Likewise, 'system-async-mark' takes a second, optional, argument that | |
3376 | specifies the thread that the async should run in. When it is | |
3377 | omitted, the async will run in the thread that called | |
3378 | 'system-async-mark'. | |
3379 | ||
3380 | C code can use the new functions scm_sigaction_for_thread and | |
3381 | scm_system_async_mark_for_thread to pass the new thread argument. | |
3382 | ||
a558cc63 MV |
3383 | When a thread blocks on a mutex, a condition variable or is waiting |
3384 | for IO to be possible, it will still execute system asyncs. This can | |
3385 | be used to interrupt such a thread by making it execute a 'throw', for | |
3386 | example. | |
3387 | ||
5e405a60 MV |
3388 | ** The function 'system-async' is deprecated. |
3389 | ||
3390 | You can now pass any zero-argument procedure to 'system-async-mark'. | |
3391 | The function 'system-async' will just return its argument unchanged | |
3392 | now. | |
3393 | ||
acfa1f52 MV |
3394 | ** New functions 'call-with-blocked-asyncs' and |
3395 | 'call-with-unblocked-asyncs' | |
3396 | ||
3397 | The expression (call-with-blocked-asyncs PROC) will call PROC and will | |
3398 | block execution of system asyncs for the current thread by one level | |
3399 | while PROC runs. Likewise, call-with-unblocked-asyncs will call a | |
3400 | procedure and will unblock the execution of system asyncs by one | |
3401 | level for the current thread. | |
3402 | ||
3403 | Only system asyncs are affected by these functions. | |
3404 | ||
3405 | ** The functions 'mask-signals' and 'unmask-signals' are deprecated. | |
3406 | ||
3407 | Use 'call-with-blocked-asyncs' or 'call-with-unblocked-asyncs' | |
3408 | instead. Those functions are easier to use correctly and can be | |
3409 | nested. | |
3410 | ||
7b232758 MV |
3411 | ** New function 'unsetenv'. |
3412 | ||
f30482f3 MV |
3413 | ** New macro 'define-syntax-public'. |
3414 | ||
3415 | It works like 'define-syntax' and also exports the defined macro (but | |
3416 | only on top-level). | |
3417 | ||
1ee34062 MV |
3418 | ** There is support for Infinity and NaNs. |
3419 | ||
3420 | Following PLT Scheme, Guile can now work with infinite numbers, and | |
3421 | 'not-a-numbers'. | |
3422 | ||
3423 | There is new syntax for numbers: "+inf.0" (infinity), "-inf.0" | |
3424 | (negative infinity), "+nan.0" (not-a-number), and "-nan.0" (same as | |
3425 | "+nan.0"). These numbers are inexact and have no exact counterpart. | |
3426 | ||
3427 | Dividing by an inexact zero returns +inf.0 or -inf.0, depending on the | |
3428 | sign of the dividend. The infinities are integers, and they answer #t | |
3429 | for both 'even?' and 'odd?'. The +nan.0 value is not an integer and is | |
3430 | not '=' to itself, but '+nan.0' is 'eqv?' to itself. | |
3431 | ||
3432 | For example | |
3433 | ||
3434 | (/ 1 0.0) | |
3435 | => +inf.0 | |
3436 | ||
3437 | (/ 0 0.0) | |
3438 | => +nan.0 | |
3439 | ||
3440 | (/ 0) | |
3441 | ERROR: Numerical overflow | |
3442 | ||
7b232758 MV |
3443 | Two new predicates 'inf?' and 'nan?' can be used to test for the |
3444 | special values. | |
3445 | ||
ba1b077b MV |
3446 | ** Inexact zero can have a sign. |
3447 | ||
3448 | Guile can now distinguish between plus and minus inexact zero, if your | |
3449 | platform supports this, too. The two zeros are equal according to | |
3450 | '=', but not according to 'eqv?'. For example | |
3451 | ||
3452 | (- 0.0) | |
3453 | => -0.0 | |
3454 | ||
3455 | (= 0.0 (- 0.0)) | |
3456 | => #t | |
3457 | ||
3458 | (eqv? 0.0 (- 0.0)) | |
3459 | => #f | |
3460 | ||
bdf26b60 MV |
3461 | ** Guile now has exact rationals. |
3462 | ||
3463 | Guile can now represent fractions such as 1/3 exactly. Computing with | |
3464 | them is also done exactly, of course: | |
3465 | ||
3466 | (* 1/3 3/2) | |
3467 | => 1/2 | |
3468 | ||
3469 | ** 'floor', 'ceiling', 'round' and 'truncate' now return exact numbers | |
3470 | for exact arguments. | |
3471 | ||
3472 | For example: (floor 2) now returns an exact 2 where in the past it | |
3473 | returned an inexact 2.0. Likewise, (floor 5/4) returns an exact 1. | |
3474 | ||
3475 | ** inexact->exact no longer returns only integers. | |
3476 | ||
3477 | Without exact rationals, the closest exact number was always an | |
3478 | integer, but now inexact->exact returns the fraction that is exactly | |
3479 | equal to a floating point number. For example: | |
3480 | ||
3481 | (inexact->exact 1.234) | |
3482 | => 694680242521899/562949953421312 | |
3483 | ||
e299cee2 | 3484 | When you want the old behavior, use 'round' explicitly: |
bdf26b60 MV |
3485 | |
3486 | (inexact->exact (round 1.234)) | |
3487 | => 1 | |
3488 | ||
3489 | ** New function 'rationalize'. | |
3490 | ||
3491 | This function finds a simple fraction that is close to a given real | |
3492 | number. For example (and compare with inexact->exact above): | |
3493 | ||
fb16d26e | 3494 | (rationalize (inexact->exact 1.234) 1/2000) |
bdf26b60 MV |
3495 | => 58/47 |
3496 | ||
fb16d26e MV |
3497 | Note that, as required by R5RS, rationalize returns only then an exact |
3498 | result when both its arguments are exact. | |
3499 | ||
bdf26b60 MV |
3500 | ** 'odd?' and 'even?' work also for inexact integers. |
3501 | ||
3502 | Previously, (odd? 1.0) would signal an error since only exact integers | |
3503 | were recognized as integers. Now (odd? 1.0) returns #t, (odd? 2.0) | |
3504 | returns #f and (odd? 1.5) signals an error. | |
3505 | ||
b0d10ba6 | 3506 | ** Guile now has uninterned symbols. |
610922b2 | 3507 | |
b0d10ba6 | 3508 | The new function 'make-symbol' will return an uninterned symbol. This |
610922b2 MV |
3509 | is a symbol that is unique and is guaranteed to remain unique. |
3510 | However, uninterned symbols can not yet be read back in. | |
3511 | ||
3512 | Use the new function 'symbol-interned?' to check whether a symbol is | |
3513 | interned or not. | |
3514 | ||
0e6f7775 MV |
3515 | ** pretty-print has more options. |
3516 | ||
3517 | The function pretty-print from the (ice-9 pretty-print) module can now | |
3518 | also be invoked with keyword arguments that control things like | |
71f271b2 | 3519 | maximum output width. See the manual for details. |
0e6f7775 | 3520 | |
8c84b81e | 3521 | ** Variables have no longer a special behavior for `equal?'. |
ee0c7345 MV |
3522 | |
3523 | Previously, comparing two variables with `equal?' would recursivly | |
3524 | compare their values. This is no longer done. Variables are now only | |
3525 | `equal?' if they are `eq?'. | |
3526 | ||
4e21fa60 MV |
3527 | ** `(begin)' is now valid. |
3528 | ||
3529 | You can now use an empty `begin' form. It will yield #<unspecified> | |
3530 | when evaluated and simply be ignored in a definition context. | |
3531 | ||
3063e30a DH |
3532 | ** Deprecated: procedure->macro |
3533 | ||
b0d10ba6 MV |
3534 | Change your code to use 'define-macro' or r5rs macros. Also, be aware |
3535 | that macro expansion will not be done during evaluation, but prior to | |
3536 | evaluation. | |
3063e30a | 3537 | |
0a50eeaa NJ |
3538 | ** Soft ports now allow a `char-ready?' procedure |
3539 | ||
3540 | The vector argument to `make-soft-port' can now have a length of | |
3541 | either 5 or 6. (Previously the length had to be 5.) The optional 6th | |
3542 | element is interpreted as an `input-waiting' thunk -- i.e. a thunk | |
3543 | that returns the number of characters that can be read immediately | |
3544 | without the soft port blocking. | |
3545 | ||
63dd3413 DH |
3546 | ** Deprecated: undefine |
3547 | ||
3548 | There is no replacement for undefine. | |
3549 | ||
9abd541e NJ |
3550 | ** The functions make-keyword-from-dash-symbol and keyword-dash-symbol |
3551 | have been discouraged. | |
aef0bdb4 MV |
3552 | |
3553 | They are relics from a time where a keyword like #:foo was used | |
3554 | directly as a Tcl option "-foo" and thus keywords were internally | |
3555 | stored as a symbol with a starting dash. We now store a symbol | |
3556 | without the dash. | |
3557 | ||
3558 | Use symbol->keyword and keyword->symbol instead. | |
3559 | ||
9abd541e NJ |
3560 | ** The `cheap' debug option is now obsolete |
3561 | ||
3562 | Evaluator trap calls are now unconditionally "cheap" - in other words, | |
3563 | they pass a debug object to the trap handler rather than a full | |
3564 | continuation. The trap handler code can capture a full continuation | |
3565 | by using `call-with-current-continuation' in the usual way, if it so | |
3566 | desires. | |
3567 | ||
3568 | The `cheap' option is retained for now so as not to break existing | |
3569 | code which gets or sets it, but setting it now has no effect. It will | |
3570 | be removed in the next major Guile release. | |
3571 | ||
3572 | ** Evaluator trap calls now support `tweaking' | |
3573 | ||
3574 | `Tweaking' means that the trap handler code can modify the Scheme | |
3575 | expression that is about to be evaluated (in the case of an | |
3576 | enter-frame trap) or the value that is being returned (in the case of | |
3577 | an exit-frame trap). The trap handler code indicates that it wants to | |
3578 | do this by returning a pair whose car is the symbol 'instead and whose | |
3579 | cdr is the modified expression or return value. | |
36a9b236 | 3580 | |
b00418df DH |
3581 | * Changes to the C interface |
3582 | ||
87bdbdbc MV |
3583 | ** The functions scm_hash_fn_remove_x and scm_hashx_remove_x no longer |
3584 | take a 'delete' function argument. | |
3585 | ||
3586 | This argument makes no sense since the delete function is used to | |
3587 | remove a pair from an alist, and this must not be configurable. | |
3588 | ||
3589 | This is an incompatible change. | |
3590 | ||
1cf1bb95 MV |
3591 | ** The GH interface is now subject to the deprecation mechanism |
3592 | ||
3593 | The GH interface has been deprecated for quite some time but now it is | |
3594 | actually removed from Guile when it is configured with | |
3595 | --disable-deprecated. | |
3596 | ||
3597 | See the manual "Transitioning away from GH" for more information. | |
3598 | ||
f7f3964e MV |
3599 | ** A new family of functions for converting between C values and |
3600 | Scheme values has been added. | |
3601 | ||
3602 | These functions follow a common naming scheme and are designed to be | |
3603 | easier to use, thread-safe and more future-proof than the older | |
3604 | alternatives. | |
3605 | ||
3606 | - int scm_is_* (...) | |
3607 | ||
3608 | These are predicates that return a C boolean: 1 or 0. Instead of | |
3609 | SCM_NFALSEP, you can now use scm_is_true, for example. | |
3610 | ||
3611 | - <type> scm_to_<type> (SCM val, ...) | |
3612 | ||
3613 | These are functions that convert a Scheme value into an appropriate | |
3614 | C value. For example, you can use scm_to_int to safely convert from | |
3615 | a SCM to an int. | |
3616 | ||
a2b6a0e7 | 3617 | - SCM scm_from_<type> (<type> val, ...) |
f7f3964e MV |
3618 | |
3619 | These functions convert from a C type to a SCM value; for example, | |
3620 | scm_from_int for ints. | |
3621 | ||
3622 | There is a huge number of these functions, for numbers, strings, | |
3623 | symbols, vectors, etc. They are documented in the reference manual in | |
3624 | the API section together with the types that they apply to. | |
3625 | ||
96d8c217 MV |
3626 | ** New functions for dealing with complex numbers in C have been added. |
3627 | ||
3628 | The new functions are scm_c_make_rectangular, scm_c_make_polar, | |
3629 | scm_c_real_part, scm_c_imag_part, scm_c_magnitude and scm_c_angle. | |
3630 | They work like scm_make_rectangular etc but take or return doubles | |
3631 | directly. | |
3632 | ||
3633 | ** The function scm_make_complex has been discouraged. | |
3634 | ||
3635 | Use scm_c_make_rectangular instead. | |
3636 | ||
f7f3964e MV |
3637 | ** The INUM macros have been deprecated. |
3638 | ||
3639 | A lot of code uses these macros to do general integer conversions, | |
b0d10ba6 MV |
3640 | although the macros only work correctly with fixnums. Use the |
3641 | following alternatives. | |
f7f3964e MV |
3642 | |
3643 | SCM_INUMP -> scm_is_integer or similar | |
3644 | SCM_NINUMP -> !scm_is_integer or similar | |
3645 | SCM_MAKINUM -> scm_from_int or similar | |
3646 | SCM_INUM -> scm_to_int or similar | |
3647 | ||
b0d10ba6 | 3648 | SCM_VALIDATE_INUM_* -> Do not use these; scm_to_int, etc. will |
f7f3964e MV |
3649 | do the validating for you. |
3650 | ||
f9656a9f MV |
3651 | ** The scm_num2<type> and scm_<type>2num functions and scm_make_real |
3652 | have been discouraged. | |
f7f3964e MV |
3653 | |
3654 | Use the newer scm_to_<type> and scm_from_<type> functions instead for | |
3655 | new code. The functions have been discouraged since they don't fit | |
3656 | the naming scheme. | |
3657 | ||
3658 | ** The 'boolean' macros SCM_FALSEP etc have been discouraged. | |
3659 | ||
3660 | They have strange names, especially SCM_NFALSEP, and SCM_BOOLP | |
3661 | evaluates its argument twice. Use scm_is_true, etc. instead for new | |
3662 | code. | |
3663 | ||
3664 | ** The macro SCM_EQ_P has been discouraged. | |
3665 | ||
3666 | Use scm_is_eq for new code, which fits better into the naming | |
3667 | conventions. | |
d5b203a6 | 3668 | |
d5ac9b2a MV |
3669 | ** The macros SCM_CONSP, SCM_NCONSP, SCM_NULLP, and SCM_NNULLP have |
3670 | been discouraged. | |
3671 | ||
3672 | Use the function scm_is_pair or scm_is_null instead. | |
3673 | ||
409eb4e5 MV |
3674 | ** The functions scm_round and scm_truncate have been deprecated and |
3675 | are now available as scm_c_round and scm_c_truncate, respectively. | |
3676 | ||
3677 | These functions occupy the names that scm_round_number and | |
3678 | scm_truncate_number should have. | |
3679 | ||
3ff9283d MV |
3680 | ** The functions scm_c_string2str, scm_c_substring2str, and |
3681 | scm_c_symbol2str have been deprecated. | |
c41acab3 MV |
3682 | |
3683 | Use scm_to_locale_stringbuf or similar instead, maybe together with | |
3684 | scm_substring. | |
3685 | ||
3ff9283d MV |
3686 | ** New functions scm_c_make_string, scm_c_string_length, |
3687 | scm_c_string_ref, scm_c_string_set_x, scm_c_substring, | |
3688 | scm_c_substring_shared, scm_c_substring_copy. | |
3689 | ||
3690 | These are like scm_make_string, scm_length, etc. but are slightly | |
3691 | easier to use from C. | |
3692 | ||
3693 | ** The macros SCM_STRINGP, SCM_STRING_CHARS, SCM_STRING_LENGTH, | |
3694 | SCM_SYMBOL_CHARS, and SCM_SYMBOL_LENGTH have been deprecated. | |
3695 | ||
3696 | They export too many assumptions about the implementation of strings | |
3697 | and symbols that are no longer true in the presence of | |
b0d10ba6 MV |
3698 | mutation-sharing substrings and when Guile switches to some form of |
3699 | Unicode. | |
3ff9283d MV |
3700 | |
3701 | When working with strings, it is often best to use the normal string | |
3702 | functions provided by Guile, such as scm_c_string_ref, | |
b0d10ba6 MV |
3703 | scm_c_string_set_x, scm_string_append, etc. Be sure to look in the |
3704 | manual since many more such functions are now provided than | |
3705 | previously. | |
3ff9283d MV |
3706 | |
3707 | When you want to convert a SCM string to a C string, use the | |
3708 | scm_to_locale_string function or similar instead. For symbols, use | |
3709 | scm_symbol_to_string and then work with that string. Because of the | |
3710 | new string representation, scm_symbol_to_string does not need to copy | |
3711 | and is thus quite efficient. | |
3712 | ||
aef0bdb4 | 3713 | ** Some string, symbol and keyword functions have been discouraged. |
3ff9283d | 3714 | |
b0d10ba6 | 3715 | They don't fit into the uniform naming scheme and are not explicit |
3ff9283d MV |
3716 | about the character encoding. |
3717 | ||
3718 | Replace according to the following table: | |
3719 | ||
3720 | scm_allocate_string -> scm_c_make_string | |
3721 | scm_take_str -> scm_take_locale_stringn | |
3722 | scm_take0str -> scm_take_locale_string | |
3723 | scm_mem2string -> scm_from_locale_stringn | |
3724 | scm_str2string -> scm_from_locale_string | |
3725 | scm_makfrom0str -> scm_from_locale_string | |
3726 | scm_mem2symbol -> scm_from_locale_symboln | |
b0d10ba6 | 3727 | scm_mem2uninterned_symbol -> scm_from_locale_stringn + scm_make_symbol |
3ff9283d MV |
3728 | scm_str2symbol -> scm_from_locale_symbol |
3729 | ||
3730 | SCM_SYMBOL_HASH -> scm_hashq | |
3731 | SCM_SYMBOL_INTERNED_P -> scm_symbol_interned_p | |
3732 | ||
aef0bdb4 MV |
3733 | scm_c_make_keyword -> scm_from_locale_keyword |
3734 | ||
3735 | ** The functions scm_keyword_to_symbol and sym_symbol_to_keyword are | |
3736 | now also available to C code. | |
3737 | ||
3738 | ** SCM_KEYWORDP and SCM_KEYWORDSYM have been deprecated. | |
3739 | ||
3740 | Use scm_is_keyword and scm_keyword_to_symbol instead, but note that | |
3741 | the latter returns the true name of the keyword, not the 'dash name', | |
3742 | as SCM_KEYWORDSYM used to do. | |
3743 | ||
dc91d8de MV |
3744 | ** A new way to access arrays in a thread-safe and efficient way has |
3745 | been added. | |
3746 | ||
3747 | See the manual, node "Accessing Arrays From C". | |
3748 | ||
3167d5e4 MV |
3749 | ** The old uniform vector and bitvector implementations have been |
3750 | unceremoniously removed. | |
d4ea47c8 | 3751 | |
a558cc63 | 3752 | This implementation exposed the details of the tagging system of |
d4ea47c8 | 3753 | Guile. Use the new C API explained in the manual in node "Uniform |
c34e5780 | 3754 | Numeric Vectors" and "Bit Vectors", respectively. |
d4ea47c8 MV |
3755 | |
3756 | The following macros are gone: SCM_UVECTOR_BASE, SCM_SET_UVECTOR_BASE, | |
3757 | SCM_UVECTOR_MAXLENGTH, SCM_UVECTOR_LENGTH, SCM_MAKE_UVECTOR_TAG, | |
3167d5e4 MV |
3758 | SCM_SET_UVECTOR_LENGTH, SCM_BITVECTOR_P, SCM_BITVECTOR_BASE, |
3759 | SCM_SET_BITVECTOR_BASE, SCM_BITVECTOR_MAX_LENGTH, | |
3760 | SCM_BITVECTOR_LENGTH, SCM_MAKE_BITVECTOR_TAG, | |
0b63c1ee MV |
3761 | SCM_SET_BITVECTOR_LENGTH, SCM_BITVEC_REF, SCM_BITVEC_SET, |
3762 | SCM_BITVEC_CLR. | |
d4ea47c8 | 3763 | |
c34e5780 MV |
3764 | ** The macros dealing with vectors have been deprecated. |
3765 | ||
3766 | Use the new functions scm_is_vector, scm_vector_elements, | |
0b63c1ee MV |
3767 | scm_vector_writable_elements, etc, or scm_is_simple_vector, |
3768 | SCM_SIMPLE_VECTOR_REF, SCM_SIMPLE_VECTOR_SET, etc instead. See the | |
3769 | manual for more details. | |
c34e5780 MV |
3770 | |
3771 | Deprecated are SCM_VECTORP, SCM_VELTS, SCM_VECTOR_MAX_LENGTH, | |
3772 | SCM_VECTOR_LENGTH, SCM_VECTOR_REF, SCM_VECTOR_SET, SCM_WRITABLE_VELTS. | |
3773 | ||
3774 | The following macros have been removed: SCM_VECTOR_BASE, | |
3775 | SCM_SET_VECTOR_BASE, SCM_MAKE_VECTOR_TAG, SCM_SET_VECTOR_LENGTH, | |
3776 | SCM_VELTS_AS_STACKITEMS, SCM_SETVELTS, SCM_GC_WRITABLE_VELTS. | |
3777 | ||
0c7a5cab | 3778 | ** Some C functions and macros related to arrays have been deprecated. |
dc91d8de MV |
3779 | |
3780 | Migrate according to the following table: | |
3781 | ||
e94d0be2 | 3782 | scm_make_uve -> scm_make_typed_array, scm_make_u8vector etc. |
dc91d8de MV |
3783 | scm_make_ra -> scm_make_array |
3784 | scm_shap2ra -> scm_make_array | |
3785 | scm_cvref -> scm_c_generalized_vector_ref | |
3786 | scm_ra_set_contp -> do not use | |
3787 | scm_aind -> scm_array_handle_pos | |
3788 | scm_raprin1 -> scm_display or scm_write | |
3789 | ||
0c7a5cab MV |
3790 | SCM_ARRAYP -> scm_is_array |
3791 | SCM_ARRAY_NDIM -> scm_c_array_rank | |
3792 | SCM_ARRAY_DIMS -> scm_array_handle_dims | |
3793 | SCM_ARRAY_CONTP -> do not use | |
3794 | SCM_ARRAY_MEM -> do not use | |
3795 | SCM_ARRAY_V -> scm_array_handle_elements or similar | |
3796 | SCM_ARRAY_BASE -> do not use | |
3797 | ||
c1e7caf7 MV |
3798 | ** SCM_CELL_WORD_LOC has been deprecated. |
3799 | ||
b0d10ba6 | 3800 | Use the new macro SCM_CELL_OBJECT_LOC instead, which returns a pointer |
c1e7caf7 MV |
3801 | to a SCM, as opposed to a pointer to a scm_t_bits. |
3802 | ||
3803 | This was done to allow the correct use of pointers into the Scheme | |
3804 | heap. Previously, the heap words were of type scm_t_bits and local | |
3805 | variables and function arguments were of type SCM, making it | |
3806 | non-standards-conformant to have a pointer that can point to both. | |
3807 | ||
3ff9283d | 3808 | ** New macros SCM_SMOB_DATA_2, SCM_SMOB_DATA_3, etc. |
27968825 MV |
3809 | |
3810 | These macros should be used instead of SCM_CELL_WORD_2/3 to access the | |
3811 | second and third words of double smobs. Likewise for | |
3812 | SCM_SET_SMOB_DATA_2 and SCM_SET_SMOB_DATA_3. | |
3813 | ||
3814 | Also, there is SCM_SMOB_FLAGS and SCM_SET_SMOB_FLAGS that should be | |
3815 | used to get and set the 16 exra bits in the zeroth word of a smob. | |
3816 | ||
3817 | And finally, there is SCM_SMOB_OBJECT and SCM_SMOB_SET_OBJECT for | |
3818 | accesing the first immediate word of a smob as a SCM value, and there | |
3819 | is SCM_SMOB_OBJECT_LOC for getting a pointer to the first immediate | |
b0d10ba6 | 3820 | smob word. Like wise for SCM_SMOB_OBJECT_2, etc. |
27968825 | 3821 | |
b0d10ba6 | 3822 | ** New way to deal with non-local exits and re-entries. |
9879d390 MV |
3823 | |
3824 | There is a new set of functions that essentially do what | |
fc6bb283 MV |
3825 | scm_internal_dynamic_wind does, but in a way that is more convenient |
3826 | for C code in some situations. Here is a quick example of how to | |
3827 | prevent a potential memory leak: | |
9879d390 MV |
3828 | |
3829 | void | |
3830 | foo () | |
3831 | { | |
3832 | char *mem; | |
3833 | ||
661ae7ab | 3834 | scm_dynwind_begin (0); |
9879d390 MV |
3835 | |
3836 | mem = scm_malloc (100); | |
661ae7ab | 3837 | scm_dynwind_unwind_handler (free, mem, SCM_F_WIND_EXPLICITLY); |
f1da8e4e MV |
3838 | |
3839 | /* MEM would leak if BAR throws an error. | |
661ae7ab | 3840 | SCM_DYNWIND_UNWIND_HANDLER frees it nevertheless. |
c41acab3 | 3841 | */ |
9879d390 | 3842 | |
9879d390 MV |
3843 | bar (); |
3844 | ||
661ae7ab | 3845 | scm_dynwind_end (); |
9879d390 | 3846 | |
e299cee2 | 3847 | /* Because of SCM_F_WIND_EXPLICITLY, MEM will be freed by |
661ae7ab | 3848 | SCM_DYNWIND_END as well. |
9879d390 MV |
3849 | */ |
3850 | } | |
3851 | ||
661ae7ab | 3852 | For full documentation, see the node "Dynamic Wind" in the manual. |
9879d390 | 3853 | |
661ae7ab | 3854 | ** New function scm_dynwind_free |
c41acab3 | 3855 | |
661ae7ab MV |
3856 | This function calls 'free' on a given pointer when a dynwind context |
3857 | is left. Thus the call to scm_dynwind_unwind_handler above could be | |
3858 | replaced with simply scm_dynwind_free (mem). | |
c41acab3 | 3859 | |
a6d75e53 MV |
3860 | ** New functions scm_c_call_with_blocked_asyncs and |
3861 | scm_c_call_with_unblocked_asyncs | |
3862 | ||
3863 | Like scm_call_with_blocked_asyncs etc. but for C functions. | |
3864 | ||
661ae7ab | 3865 | ** New functions scm_dynwind_block_asyncs and scm_dynwind_unblock_asyncs |
49c00ecc MV |
3866 | |
3867 | In addition to scm_c_call_with_blocked_asyncs you can now also use | |
661ae7ab MV |
3868 | scm_dynwind_block_asyncs in a 'dynwind context' (see above). Likewise for |
3869 | scm_c_call_with_unblocked_asyncs and scm_dynwind_unblock_asyncs. | |
49c00ecc | 3870 | |
a558cc63 MV |
3871 | ** The macros SCM_DEFER_INTS, SCM_ALLOW_INTS, SCM_REDEFER_INTS, |
3872 | SCM_REALLOW_INTS have been deprecated. | |
3873 | ||
3874 | They do no longer fulfill their original role of blocking signal | |
3875 | delivery. Depending on what you want to achieve, replace a pair of | |
661ae7ab MV |
3876 | SCM_DEFER_INTS and SCM_ALLOW_INTS with a dynwind context that locks a |
3877 | mutex, blocks asyncs, or both. See node "Critical Sections" in the | |
3878 | manual. | |
a6d75e53 MV |
3879 | |
3880 | ** The value 'scm_mask_ints' is no longer writable. | |
3881 | ||
3882 | Previously, you could set scm_mask_ints directly. This is no longer | |
3883 | possible. Use scm_c_call_with_blocked_asyncs and | |
3884 | scm_c_call_with_unblocked_asyncs instead. | |
a558cc63 | 3885 | |
49c00ecc MV |
3886 | ** New way to temporarily set the current input, output or error ports |
3887 | ||
661ae7ab | 3888 | C code can now use scm_dynwind_current_<foo>_port in a 'dynwind |
0f24e75b | 3889 | context' (see above). <foo> is one of "input", "output" or "error". |
49c00ecc | 3890 | |
fc6bb283 MV |
3891 | ** New way to temporarily set fluids |
3892 | ||
661ae7ab | 3893 | C code can now use scm_dynwind_fluid in a 'dynwind context' (see |
fc6bb283 MV |
3894 | above) to temporarily set the value of a fluid. |
3895 | ||
89fcf1b4 MV |
3896 | ** New types scm_t_intmax and scm_t_uintmax. |
3897 | ||
3898 | On platforms that have them, these types are identical to intmax_t and | |
3899 | uintmax_t, respectively. On other platforms, they are identical to | |
3900 | the largest integer types that Guile knows about. | |
3901 | ||
b0d10ba6 | 3902 | ** The functions scm_unmemocopy and scm_unmemoize have been removed. |
9fcf3cbb | 3903 | |
b0d10ba6 | 3904 | You should not have used them. |
9fcf3cbb | 3905 | |
5ebbe4ef RB |
3906 | ** Many public #defines with generic names have been made private. |
3907 | ||
3908 | #defines with generic names like HAVE_FOO or SIZEOF_FOO have been made | |
b0d10ba6 | 3909 | private or renamed with a more suitable public name. |
f03314f9 DH |
3910 | |
3911 | ** The macro SCM_TYP16S has been deprecated. | |
3912 | ||
b0d10ba6 | 3913 | This macro is not intended for public use. |
f03314f9 | 3914 | |
0d5e3480 DH |
3915 | ** The macro SCM_SLOPPY_INEXACTP has been deprecated. |
3916 | ||
b0d10ba6 | 3917 | Use scm_is_true (scm_inexact_p (...)) instead. |
0d5e3480 DH |
3918 | |
3919 | ** The macro SCM_SLOPPY_REALP has been deprecated. | |
3920 | ||
b0d10ba6 | 3921 | Use scm_is_real instead. |
0d5e3480 DH |
3922 | |
3923 | ** The macro SCM_SLOPPY_COMPLEXP has been deprecated. | |
3924 | ||
b0d10ba6 | 3925 | Use scm_is_complex instead. |
5ebbe4ef | 3926 | |
b0d10ba6 | 3927 | ** Some preprocessor defines have been deprecated. |
5ebbe4ef | 3928 | |
b0d10ba6 MV |
3929 | These defines indicated whether a certain feature was present in Guile |
3930 | or not. Going forward, assume that the features are always present. | |
5ebbe4ef | 3931 | |
b0d10ba6 MV |
3932 | The macros are: USE_THREADS, GUILE_ISELECT, READER_EXTENSIONS, |
3933 | DEBUG_EXTENSIONS, DYNAMIC_LINKING. | |
5ebbe4ef | 3934 | |
b0d10ba6 MV |
3935 | The following macros have been removed completely: MEMOIZE_LOCALS, |
3936 | SCM_RECKLESS, SCM_CAUTIOUS. | |
5ebbe4ef RB |
3937 | |
3938 | ** The preprocessor define STACK_DIRECTION has been deprecated. | |
3939 | ||
3940 | There should be no need to know about the stack direction for ordinary | |
b0d10ba6 | 3941 | programs. |
5ebbe4ef | 3942 | |
b2cbe8d8 RB |
3943 | ** New function: scm_effective_version |
3944 | ||
3945 | Returns the "effective" version number. This is just the normal full | |
3946 | version string without the final micro-version number. See "Changes | |
3947 | to the distribution" above. | |
3948 | ||
2902a459 MV |
3949 | ** The function scm_call_with_new_thread has a new prototype. |
3950 | ||
3951 | Instead of taking a list with the thunk and handler, these two | |
3952 | arguments are now passed directly: | |
3953 | ||
3954 | SCM scm_call_with_new_thread (SCM thunk, SCM handler); | |
3955 | ||
3956 | This is an incompatible change. | |
3957 | ||
ffd0ef3b MV |
3958 | ** New snarfer macro SCM_DEFINE_PUBLIC. |
3959 | ||
3960 | This is like SCM_DEFINE, but also calls scm_c_export for the defined | |
3961 | function in the init section. | |
3962 | ||
8734ce02 MV |
3963 | ** The snarfer macro SCM_SNARF_INIT is now officially supported. |
3964 | ||
39e8f371 HWN |
3965 | ** Garbage collector rewrite. |
3966 | ||
3967 | The garbage collector is cleaned up a lot, and now uses lazy | |
3968 | sweeping. This is reflected in the output of (gc-stats); since cells | |
3969 | are being freed when they are allocated, the cells-allocated field | |
3970 | stays roughly constant. | |
3971 | ||
3972 | For malloc related triggers, the behavior is changed. It uses the same | |
3973 | heuristic as the cell-triggered collections. It may be tuned with the | |
3974 | environment variables GUILE_MIN_YIELD_MALLOC. This is the percentage | |
3975 | for minimum yield of malloc related triggers. The default is 40. | |
3976 | GUILE_INIT_MALLOC_LIMIT sets the initial trigger for doing a GC. The | |
3977 | default is 200 kb. | |
3978 | ||
3979 | Debugging operations for the freelist have been deprecated, along with | |
3980 | the C variables that control garbage collection. The environment | |
3981 | variables GUILE_MAX_SEGMENT_SIZE, GUILE_INIT_SEGMENT_SIZE_2, | |
3982 | GUILE_INIT_SEGMENT_SIZE_1, and GUILE_MIN_YIELD_2 should be used. | |
3983 | ||
1367aa5e HWN |
3984 | For understanding the memory usage of a GUILE program, the routine |
3985 | gc-live-object-stats returns an alist containing the number of live | |
3986 | objects for every type. | |
3987 | ||
3988 | ||
5ec1d2c8 DH |
3989 | ** The function scm_definedp has been renamed to scm_defined_p |
3990 | ||
3991 | The name scm_definedp is deprecated. | |
3992 | ||
b0d10ba6 | 3993 | ** The struct scm_cell type has been renamed to scm_t_cell |
228a24ef DH |
3994 | |
3995 | This is in accordance to Guile's naming scheme for types. Note that | |
3996 | the name scm_cell is now used for a function that allocates and | |
3997 | initializes a new cell (see below). | |
3998 | ||
0906625f MV |
3999 | ** New functions for memory management |
4000 | ||
4001 | A new set of functions for memory management has been added since the | |
4002 | old way (scm_must_malloc, scm_must_free, etc) was error prone and | |
4003 | indeed, Guile itself contained some long standing bugs that could | |
4004 | cause aborts in long running programs. | |
4005 | ||
4006 | The new functions are more symmetrical and do not need cooperation | |
4007 | from smob free routines, among other improvements. | |
4008 | ||
eab1b259 HWN |
4009 | The new functions are scm_malloc, scm_realloc, scm_calloc, scm_strdup, |
4010 | scm_strndup, scm_gc_malloc, scm_gc_calloc, scm_gc_realloc, | |
4011 | scm_gc_free, scm_gc_register_collectable_memory, and | |
0906625f MV |
4012 | scm_gc_unregister_collectable_memory. Refer to the manual for more |
4013 | details and for upgrading instructions. | |
4014 | ||
4015 | The old functions for memory management have been deprecated. They | |
4016 | are: scm_must_malloc, scm_must_realloc, scm_must_free, | |
4017 | scm_must_strdup, scm_must_strndup, scm_done_malloc, scm_done_free. | |
4018 | ||
4aa104a4 MV |
4019 | ** Declarations of exported features are marked with SCM_API. |
4020 | ||
4021 | Every declaration of a feature that belongs to the exported Guile API | |
4022 | has been marked by adding the macro "SCM_API" to the start of the | |
4023 | declaration. This macro can expand into different things, the most | |
4024 | common of which is just "extern" for Unix platforms. On Win32, it can | |
4025 | be used to control which symbols are exported from a DLL. | |
4026 | ||
8f99e3f3 | 4027 | If you `#define SCM_IMPORT' before including <libguile.h>, SCM_API |
4aa104a4 MV |
4028 | will expand into "__declspec (dllimport) extern", which is needed for |
4029 | linking to the Guile DLL in Windows. | |
4030 | ||
b0d10ba6 | 4031 | There are also SCM_RL_IMPORT, SCM_SRFI1314_IMPORT, and |
8f99e3f3 | 4032 | SCM_SRFI4_IMPORT, for the corresponding libraries. |
4aa104a4 | 4033 | |
a9930d22 MV |
4034 | ** SCM_NEWCELL and SCM_NEWCELL2 have been deprecated. |
4035 | ||
b0d10ba6 MV |
4036 | Use the new functions scm_cell and scm_double_cell instead. The old |
4037 | macros had problems because with them allocation and initialization | |
4038 | was separated and the GC could sometimes observe half initialized | |
4039 | cells. Only careful coding by the user of SCM_NEWCELL and | |
4040 | SCM_NEWCELL2 could make this safe and efficient. | |
a9930d22 | 4041 | |
5132eef0 DH |
4042 | ** CHECK_ENTRY, CHECK_APPLY and CHECK_EXIT have been deprecated. |
4043 | ||
4044 | Use the variables scm_check_entry_p, scm_check_apply_p and scm_check_exit_p | |
4045 | instead. | |
4046 | ||
bc76d628 DH |
4047 | ** SRCBRKP has been deprecated. |
4048 | ||
4049 | Use scm_c_source_property_breakpoint_p instead. | |
4050 | ||
3063e30a DH |
4051 | ** Deprecated: scm_makmacro |
4052 | ||
b0d10ba6 MV |
4053 | Change your code to use either scm_makmmacro or to define macros in |
4054 | Scheme, using 'define-macro'. | |
1e5f92ce | 4055 | |
1a61d41b MV |
4056 | ** New function scm_c_port_for_each. |
4057 | ||
4058 | This function is like scm_port_for_each but takes a pointer to a C | |
4059 | function as the callback instead of a SCM value. | |
4060 | ||
1f834c95 MV |
4061 | ** The names scm_internal_select, scm_thread_sleep, and |
4062 | scm_thread_usleep have been discouraged. | |
4063 | ||
4064 | Use scm_std_select, scm_std_sleep, scm_std_usleep instead. | |
4065 | ||
aa9200e5 MV |
4066 | ** The GC can no longer be blocked. |
4067 | ||
4068 | The global flags scm_gc_heap_lock and scm_block_gc have been removed. | |
4069 | The GC can now run (partially) concurrently with other code and thus | |
4070 | blocking it is not well defined. | |
4071 | ||
b0d10ba6 MV |
4072 | ** Many definitions have been removed that were previously deprecated. |
4073 | ||
4074 | scm_lisp_nil, scm_lisp_t, s_nil_ify, scm_m_nil_ify, s_t_ify, | |
4075 | scm_m_t_ify, s_0_cond, scm_m_0_cond, s_0_ify, scm_m_0_ify, s_1_ify, | |
4076 | scm_m_1_ify, scm_debug_newcell, scm_debug_newcell2, | |
4077 | scm_tc16_allocated, SCM_SET_SYMBOL_HASH, SCM_IM_NIL_IFY, SCM_IM_T_IFY, | |
4078 | SCM_IM_0_COND, SCM_IM_0_IFY, SCM_IM_1_IFY, SCM_GC_SET_ALLOCATED, | |
4079 | scm_debug_newcell, scm_debug_newcell2, SCM_HUP_SIGNAL, SCM_INT_SIGNAL, | |
4080 | SCM_FPE_SIGNAL, SCM_BUS_SIGNAL, SCM_SEGV_SIGNAL, SCM_ALRM_SIGNAL, | |
4081 | SCM_GC_SIGNAL, SCM_TICK_SIGNAL, SCM_SIG_ORD, SCM_ORD_SIG, | |
4082 | SCM_NUM_SIGS, scm_top_level_lookup_closure_var, | |
4083 | *top-level-lookup-closure*, scm_system_transformer, scm_eval_3, | |
4084 | scm_eval2, root_module_lookup_closure, SCM_SLOPPY_STRINGP, | |
4085 | SCM_RWSTRINGP, scm_read_only_string_p, scm_make_shared_substring, | |
4086 | scm_tc7_substring, sym_huh, SCM_VARVCELL, SCM_UDVARIABLEP, | |
4087 | SCM_DEFVARIABLEP, scm_mkbig, scm_big2inum, scm_adjbig, scm_normbig, | |
4088 | scm_copybig, scm_2ulong2big, scm_dbl2big, scm_big2dbl, SCM_FIXNUM_BIT, | |
4089 | SCM_SETCHARS, SCM_SLOPPY_SUBSTRP, SCM_SUBSTR_STR, SCM_SUBSTR_OFFSET, | |
4090 | SCM_LENGTH_MAX, SCM_SETLENGTH, SCM_ROSTRINGP, SCM_ROLENGTH, | |
4091 | SCM_ROCHARS, SCM_ROUCHARS, SCM_SUBSTRP, SCM_COERCE_SUBSTR, | |
4092 | scm_sym2vcell, scm_intern, scm_intern0, scm_sysintern, scm_sysintern0, | |
66c8ded2 | 4093 | scm_sysintern0_no_module_lookup, scm_init_symbols_deprecated, |
2109da78 | 4094 | scm_vector_set_length_x, scm_contregs, scm_debug_info, |
983e697d MV |
4095 | scm_debug_frame, SCM_DSIDEVAL, SCM_CONST_LONG, SCM_VCELL, |
4096 | SCM_GLOBAL_VCELL, SCM_VCELL_INIT, SCM_GLOBAL_VCELL_INIT, | |
4097 | SCM_HUGE_LENGTH, SCM_VALIDATE_STRINGORSUBSTR, SCM_VALIDATE_ROSTRING, | |
4098 | SCM_VALIDATE_ROSTRING_COPY, SCM_VALIDATE_NULLORROSTRING_COPY, | |
4099 | SCM_VALIDATE_RWSTRING, DIGITS, scm_small_istr2int, scm_istr2int, | |
2109da78 MV |
4100 | scm_istr2flo, scm_istring2number, scm_istr2int, scm_istr2flo, |
4101 | scm_istring2number, scm_vtable_index_vcell, scm_si_vcell, SCM_ECONSP, | |
4102 | SCM_NECONSP, SCM_GLOC_VAR, SCM_GLOC_VAL, SCM_GLOC_SET_VAL, | |
c41acab3 MV |
4103 | SCM_GLOC_VAL_LOC, scm_make_gloc, scm_gloc_p, scm_tc16_variable, |
4104 | SCM_CHARS, SCM_LENGTH, SCM_SET_STRING_CHARS, SCM_SET_STRING_LENGTH. | |
b51bad08 | 4105 | |
09172f9c NJ |
4106 | * Changes to bundled modules |
4107 | ||
4108 | ** (ice-9 debug) | |
4109 | ||
4110 | Using the (ice-9 debug) module no longer automatically switches Guile | |
4111 | to use the debugging evaluator. If you want to switch to the | |
4112 | debugging evaluator (which is needed for backtrace information if you | |
4113 | hit an error), please add an explicit "(debug-enable 'debug)" to your | |
4114 | code just after the code to use (ice-9 debug). | |
4115 | ||
328dc9a3 | 4116 | \f |
c299f186 MD |
4117 | Changes since Guile 1.4: |
4118 | ||
4119 | * Changes to the distribution | |
4120 | ||
32d6f999 TTN |
4121 | ** A top-level TODO file is included. |
4122 | ||
311b6a3c | 4123 | ** Guile now uses a versioning scheme similar to that of the Linux kernel. |
c81ea65d RB |
4124 | |
4125 | Guile now always uses three numbers to represent the version, | |
4126 | i.e. "1.6.5". The first number, 1, is the major version number, the | |
4127 | second number, 6, is the minor version number, and the third number, | |
4128 | 5, is the micro version number. Changes in major version number | |
4129 | indicate major changes in Guile. | |
4130 | ||
4131 | Minor version numbers that are even denote stable releases, and odd | |
4132 | minor version numbers denote development versions (which may be | |
4133 | unstable). The micro version number indicates a minor sub-revision of | |
4134 | a given MAJOR.MINOR release. | |
4135 | ||
4136 | In keeping with the new scheme, (minor-version) and scm_minor_version | |
4137 | no longer return everything but the major version number. They now | |
4138 | just return the minor version number. Two new functions | |
4139 | (micro-version) and scm_micro_version have been added to report the | |
4140 | micro version number. | |
4141 | ||
4142 | In addition, ./GUILE-VERSION now defines GUILE_MICRO_VERSION. | |
4143 | ||
5c790b44 RB |
4144 | ** New preprocessor definitions are available for checking versions. |
4145 | ||
4146 | version.h now #defines SCM_MAJOR_VERSION, SCM_MINOR_VERSION, and | |
4147 | SCM_MICRO_VERSION to the appropriate integer values. | |
4148 | ||
311b6a3c MV |
4149 | ** Guile now actively warns about deprecated features. |
4150 | ||
4151 | The new configure option `--enable-deprecated=LEVEL' and the | |
4152 | environment variable GUILE_WARN_DEPRECATED control this mechanism. | |
4153 | See INSTALL and README for more information. | |
4154 | ||
0b073f0f RB |
4155 | ** Guile is much more likely to work on 64-bit architectures. |
4156 | ||
4157 | Guile now compiles and passes "make check" with only two UNRESOLVED GC | |
5e137c65 RB |
4158 | cases on Alpha and ia64 based machines now. Thanks to John Goerzen |
4159 | for the use of a test machine, and thanks to Stefan Jahn for ia64 | |
4160 | patches. | |
0b073f0f | 4161 | |
e658215a RB |
4162 | ** New functions: setitimer and getitimer. |
4163 | ||
4164 | These implement a fairly direct interface to the libc functions of the | |
4165 | same name. | |
4166 | ||
8630fdfc RB |
4167 | ** The #. reader extension is now disabled by default. |
4168 | ||
4169 | For safety reasons, #. evaluation is disabled by default. To | |
4170 | re-enable it, set the fluid read-eval? to #t. For example: | |
4171 | ||
67b7dd9e | 4172 | (fluid-set! read-eval? #t) |
8630fdfc RB |
4173 | |
4174 | but make sure you realize the potential security risks involved. With | |
4175 | read-eval? enabled, reading a data file from an untrusted source can | |
4176 | be dangerous. | |
4177 | ||
f2a75d81 | 4178 | ** New SRFI modules have been added: |
4df36934 | 4179 | |
dfdf5826 MG |
4180 | SRFI-0 `cond-expand' is now supported in Guile, without requiring |
4181 | using a module. | |
4182 | ||
e8bb0476 MG |
4183 | (srfi srfi-1) is a library containing many useful pair- and list-processing |
4184 | procedures. | |
4185 | ||
7adc2c58 | 4186 | (srfi srfi-2) exports and-let*. |
4df36934 | 4187 | |
b74a7ec8 MG |
4188 | (srfi srfi-4) implements homogeneous numeric vector datatypes. |
4189 | ||
7adc2c58 RB |
4190 | (srfi srfi-6) is a dummy module for now, since guile already provides |
4191 | all of the srfi-6 procedures by default: open-input-string, | |
4192 | open-output-string, get-output-string. | |
4df36934 | 4193 | |
7adc2c58 | 4194 | (srfi srfi-8) exports receive. |
4df36934 | 4195 | |
7adc2c58 | 4196 | (srfi srfi-9) exports define-record-type. |
4df36934 | 4197 | |
dfdf5826 MG |
4198 | (srfi srfi-10) exports define-reader-ctor and implements the reader |
4199 | extension #,(). | |
4200 | ||
7adc2c58 | 4201 | (srfi srfi-11) exports let-values and let*-values. |
4df36934 | 4202 | |
7adc2c58 | 4203 | (srfi srfi-13) implements the SRFI String Library. |
53e29a1e | 4204 | |
7adc2c58 | 4205 | (srfi srfi-14) implements the SRFI Character-Set Library. |
53e29a1e | 4206 | |
dfdf5826 MG |
4207 | (srfi srfi-17) implements setter and getter-with-setter and redefines |
4208 | some accessor procedures as procedures with getters. (such as car, | |
4209 | cdr, vector-ref etc.) | |
4210 | ||
4211 | (srfi srfi-19) implements the SRFI Time/Date Library. | |
2b60bc95 | 4212 | |
466bb4b3 TTN |
4213 | ** New scripts / "executable modules" |
4214 | ||
4215 | Subdirectory "scripts" contains Scheme modules that are packaged to | |
4216 | also be executable as scripts. At this time, these scripts are available: | |
4217 | ||
4218 | display-commentary | |
4219 | doc-snarf | |
4220 | generate-autoload | |
4221 | punify | |
58e5b910 | 4222 | read-scheme-source |
466bb4b3 TTN |
4223 | use2dot |
4224 | ||
4225 | See README there for more info. | |
4226 | ||
54c17ccb TTN |
4227 | These scripts can be invoked from the shell with the new program |
4228 | "guile-tools", which keeps track of installation directory for you. | |
4229 | For example: | |
4230 | ||
4231 | $ guile-tools display-commentary srfi/*.scm | |
4232 | ||
4233 | guile-tools is copied to the standard $bindir on "make install". | |
4234 | ||
0109c4bf MD |
4235 | ** New module (ice-9 stack-catch): |
4236 | ||
4237 | stack-catch is like catch, but saves the current state of the stack in | |
3c1d1301 RB |
4238 | the fluid the-last-stack. This fluid can be useful when using the |
4239 | debugger and when re-throwing an error. | |
0109c4bf | 4240 | |
fbf0c8c7 MV |
4241 | ** The module (ice-9 and-let*) has been renamed to (ice-9 and-let-star) |
4242 | ||
4243 | This has been done to prevent problems on lesser operating systems | |
4244 | that can't tolerate `*'s in file names. The exported macro continues | |
4245 | to be named `and-let*', of course. | |
4246 | ||
4f60cc33 | 4247 | On systems that support it, there is also a compatibility module named |
fbf0c8c7 | 4248 | (ice-9 and-let*). It will go away in the next release. |
6c0201ad | 4249 | |
9d774814 | 4250 | ** New modules (oop goops) etc.: |
14f1d9fe MD |
4251 | |
4252 | (oop goops) | |
4253 | (oop goops describe) | |
4254 | (oop goops save) | |
4255 | (oop goops active-slot) | |
4256 | (oop goops composite-slot) | |
4257 | ||
9d774814 | 4258 | The Guile Object Oriented Programming System (GOOPS) has been |
311b6a3c MV |
4259 | integrated into Guile. For further information, consult the GOOPS |
4260 | manual and tutorial in the `doc' directory. | |
14f1d9fe | 4261 | |
9d774814 GH |
4262 | ** New module (ice-9 rdelim). |
4263 | ||
4264 | This exports the following procedures which were previously defined | |
1c8cbd62 | 4265 | in the default environment: |
9d774814 | 4266 | |
1c8cbd62 GH |
4267 | read-line read-line! read-delimited read-delimited! %read-delimited! |
4268 | %read-line write-line | |
9d774814 | 4269 | |
1c8cbd62 GH |
4270 | For backwards compatibility the definitions are still imported into the |
4271 | default environment in this version of Guile. However you should add: | |
9d774814 GH |
4272 | |
4273 | (use-modules (ice-9 rdelim)) | |
4274 | ||
1c8cbd62 GH |
4275 | to any program which uses the definitions, since this may change in |
4276 | future. | |
9d774814 GH |
4277 | |
4278 | Alternatively, if guile-scsh is installed, the (scsh rdelim) module | |
4279 | can be used for similar functionality. | |
4280 | ||
7e267da1 GH |
4281 | ** New module (ice-9 rw) |
4282 | ||
4283 | This is a subset of the (scsh rw) module from guile-scsh. Currently | |
373f4948 | 4284 | it defines two procedures: |
7e267da1 | 4285 | |
311b6a3c | 4286 | *** New function: read-string!/partial str [port_or_fdes [start [end]]] |
7e267da1 | 4287 | |
4bcdfe46 GH |
4288 | Read characters from a port or file descriptor into a string STR. |
4289 | A port must have an underlying file descriptor -- a so-called | |
4290 | fport. This procedure is scsh-compatible and can efficiently read | |
311b6a3c | 4291 | large strings. |
7e267da1 | 4292 | |
4bcdfe46 GH |
4293 | *** New function: write-string/partial str [port_or_fdes [start [end]]] |
4294 | ||
4295 | Write characters from a string STR to a port or file descriptor. | |
4296 | A port must have an underlying file descriptor -- a so-called | |
4297 | fport. This procedure is mostly compatible and can efficiently | |
4298 | write large strings. | |
4299 | ||
e5005373 KN |
4300 | ** New module (ice-9 match) |
4301 | ||
311b6a3c MV |
4302 | This module includes Andrew K. Wright's pattern matcher. See |
4303 | ice-9/match.scm for brief description or | |
e5005373 | 4304 | |
311b6a3c | 4305 | http://www.star-lab.com/wright/code.html |
e5005373 | 4306 | |
311b6a3c | 4307 | for complete documentation. |
e5005373 | 4308 | |
4f60cc33 NJ |
4309 | ** New module (ice-9 buffered-input) |
4310 | ||
4311 | This module provides procedures to construct an input port from an | |
4312 | underlying source of input that reads and returns its input in chunks. | |
4313 | The underlying input source is a Scheme procedure, specified by the | |
4314 | caller, which the port invokes whenever it needs more input. | |
4315 | ||
4316 | This is useful when building an input port whose back end is Readline | |
4317 | or a UI element such as the GtkEntry widget. | |
4318 | ||
4319 | ** Documentation | |
4320 | ||
4321 | The reference and tutorial documentation that was previously | |
4322 | distributed separately, as `guile-doc', is now included in the core | |
4323 | Guile distribution. The documentation consists of the following | |
4324 | manuals. | |
4325 | ||
4326 | - The Guile Tutorial (guile-tut.texi) contains a tutorial introduction | |
4327 | to using Guile. | |
4328 | ||
4329 | - The Guile Reference Manual (guile.texi) contains (or is intended to | |
4330 | contain) reference documentation on all aspects of Guile. | |
4331 | ||
4332 | - The GOOPS Manual (goops.texi) contains both tutorial-style and | |
4333 | reference documentation for using GOOPS, Guile's Object Oriented | |
4334 | Programming System. | |
4335 | ||
c3e62877 NJ |
4336 | - The Revised^5 Report on the Algorithmic Language Scheme |
4337 | (r5rs.texi). | |
4f60cc33 NJ |
4338 | |
4339 | See the README file in the `doc' directory for more details. | |
4340 | ||
094a67bb MV |
4341 | ** There are a couple of examples in the examples/ directory now. |
4342 | ||
9d774814 GH |
4343 | * Changes to the stand-alone interpreter |
4344 | ||
e7e58018 MG |
4345 | ** New command line option `--use-srfi' |
4346 | ||
4347 | Using this option, SRFI modules can be loaded on startup and be | |
4348 | available right from the beginning. This makes programming portable | |
4349 | Scheme programs easier. | |
4350 | ||
4351 | The option `--use-srfi' expects a comma-separated list of numbers, | |
4352 | each representing a SRFI number to be loaded into the interpreter | |
4353 | before starting evaluating a script file or the REPL. Additionally, | |
4354 | the feature identifier for the loaded SRFIs is recognized by | |
4355 | `cond-expand' when using this option. | |
4356 | ||
4357 | Example: | |
4358 | $ guile --use-srfi=8,13 | |
4359 | guile> (receive (x z) (values 1 2) (+ 1 2)) | |
4360 | 3 | |
58e5b910 | 4361 | guile> (string-pad "bla" 20) |
e7e58018 MG |
4362 | " bla" |
4363 | ||
094a67bb MV |
4364 | ** Guile now always starts up in the `(guile-user)' module. |
4365 | ||
6e9382f1 | 4366 | Previously, scripts executed via the `-s' option would run in the |
094a67bb MV |
4367 | `(guile)' module and the repl would run in the `(guile-user)' module. |
4368 | Now every user action takes place in the `(guile-user)' module by | |
4369 | default. | |
e7e58018 | 4370 | |
c299f186 MD |
4371 | * Changes to Scheme functions and syntax |
4372 | ||
720e1c30 MV |
4373 | ** Character classifiers work for non-ASCII characters. |
4374 | ||
4375 | The predicates `char-alphabetic?', `char-numeric?', | |
4376 | `char-whitespace?', `char-lower?', `char-upper?' and `char-is-both?' | |
4377 | no longer check whether their arguments are ASCII characters. | |
4378 | Previously, a character would only be considered alphabetic when it | |
4379 | was also ASCII, for example. | |
4380 | ||
311b6a3c MV |
4381 | ** Previously deprecated Scheme functions have been removed: |
4382 | ||
4383 | tag - no replacement. | |
4384 | fseek - replaced by seek. | |
4385 | list* - replaced by cons*. | |
4386 | ||
4387 | ** It's now possible to create modules with controlled environments | |
4388 | ||
4389 | Example: | |
4390 | ||
4391 | (use-modules (ice-9 safe)) | |
4392 | (define m (make-safe-module)) | |
4393 | ;;; m will now be a module containing only a safe subset of R5RS | |
4394 | (eval '(+ 1 2) m) --> 3 | |
4395 | (eval 'load m) --> ERROR: Unbound variable: load | |
4396 | ||
4397 | ** Evaluation of "()", the empty list, is now an error. | |
8c2c9967 MV |
4398 | |
4399 | Previously, the expression "()" evaluated to the empty list. This has | |
4400 | been changed to signal a "missing expression" error. The correct way | |
4401 | to write the empty list as a literal constant is to use quote: "'()". | |
4402 | ||
311b6a3c MV |
4403 | ** New concept of `Guile Extensions'. |
4404 | ||
4405 | A Guile Extension is just a ordinary shared library that can be linked | |
4406 | at run-time. We found it advantageous to give this simple concept a | |
4407 | dedicated name to distinguish the issues related to shared libraries | |
4408 | from the issues related to the module system. | |
4409 | ||
4410 | *** New function: load-extension | |
4411 | ||
4412 | Executing (load-extension lib init) is mostly equivalent to | |
4413 | ||
4414 | (dynamic-call init (dynamic-link lib)) | |
4415 | ||
4416 | except when scm_register_extension has been called previously. | |
4417 | Whenever appropriate, you should use `load-extension' instead of | |
4418 | dynamic-link and dynamic-call. | |
4419 | ||
4420 | *** New C function: scm_c_register_extension | |
4421 | ||
4422 | This function registers a initialization function for use by | |
4423 | `load-extension'. Use it when you don't want specific extensions to | |
4424 | be loaded as shared libraries (for example on platforms that don't | |
4425 | support dynamic linking). | |
4426 | ||
8c2c9967 MV |
4427 | ** Auto-loading of compiled-code modules is deprecated. |
4428 | ||
4429 | Guile used to be able to automatically find and link a shared | |
c10ecc4c | 4430 | library to satisfy requests for a module. For example, the module |
8c2c9967 MV |
4431 | `(foo bar)' could be implemented by placing a shared library named |
4432 | "foo/libbar.so" (or with a different extension) in a directory on the | |
4433 | load path of Guile. | |
4434 | ||
311b6a3c MV |
4435 | This has been found to be too tricky, and is no longer supported. The |
4436 | shared libraries are now called "extensions". You should now write a | |
4437 | small Scheme file that calls `load-extension' to load the shared | |
e299cee2 | 4438 | library and initialize it explicitly. |
8c2c9967 MV |
4439 | |
4440 | The shared libraries themselves should be installed in the usual | |
4441 | places for shared libraries, with names like "libguile-foo-bar". | |
4442 | ||
4443 | For example, place this into a file "foo/bar.scm" | |
4444 | ||
4445 | (define-module (foo bar)) | |
4446 | ||
311b6a3c MV |
4447 | (load-extension "libguile-foo-bar" "foobar_init") |
4448 | ||
4449 | ** Backward incompatible change: eval EXP ENVIRONMENT-SPECIFIER | |
4450 | ||
4451 | `eval' is now R5RS, that is it takes two arguments. | |
4452 | The second argument is an environment specifier, i.e. either | |
4453 | ||
4454 | (scheme-report-environment 5) | |
4455 | (null-environment 5) | |
4456 | (interaction-environment) | |
4457 | ||
4458 | or | |
8c2c9967 | 4459 | |
311b6a3c | 4460 | any module. |
8c2c9967 | 4461 | |
6f76852b MV |
4462 | ** The module system has been made more disciplined. |
4463 | ||
311b6a3c MV |
4464 | The function `eval' will save and restore the current module around |
4465 | the evaluation of the specified expression. While this expression is | |
4466 | evaluated, `(current-module)' will now return the right module, which | |
4467 | is the module specified as the second argument to `eval'. | |
6f76852b | 4468 | |
311b6a3c | 4469 | A consequence of this change is that `eval' is not particularly |
6f76852b MV |
4470 | useful when you want allow the evaluated code to change what module is |
4471 | designated as the current module and have this change persist from one | |
4472 | call to `eval' to the next. The read-eval-print-loop is an example | |
4473 | where `eval' is now inadequate. To compensate, there is a new | |
4474 | function `primitive-eval' that does not take a module specifier and | |
4475 | that does not save/restore the current module. You should use this | |
4476 | function together with `set-current-module', `current-module', etc | |
4477 | when you want to have more control over the state that is carried from | |
4478 | one eval to the next. | |
4479 | ||
4480 | Additionally, it has been made sure that forms that are evaluated at | |
4481 | the top level are always evaluated with respect to the current module. | |
4482 | Previously, subforms of top-level forms such as `begin', `case', | |
4483 | etc. did not respect changes to the current module although these | |
4484 | subforms are at the top-level as well. | |
4485 | ||
311b6a3c | 4486 | To prevent strange behavior, the forms `define-module', |
6f76852b MV |
4487 | `use-modules', `use-syntax', and `export' have been restricted to only |
4488 | work on the top level. The forms `define-public' and | |
4489 | `defmacro-public' only export the new binding on the top level. They | |
4490 | behave just like `define' and `defmacro', respectively, when they are | |
4491 | used in a lexical environment. | |
4492 | ||
0a892a2c MV |
4493 | Also, `export' will no longer silently re-export bindings imported |
4494 | from a used module. It will emit a `deprecation' warning and will | |
4495 | cease to perform any re-export in the next version. If you actually | |
4496 | want to re-export bindings, use the new `re-export' in place of | |
4497 | `export'. The new `re-export' will not make copies of variables when | |
4498 | rexporting them, as `export' did wrongly. | |
4499 | ||
047dc3ae TTN |
4500 | ** Module system now allows selection and renaming of imported bindings |
4501 | ||
4502 | Previously, when using `use-modules' or the `#:use-module' clause in | |
4503 | the `define-module' form, all the bindings (association of symbols to | |
4504 | values) for imported modules were added to the "current module" on an | |
4505 | as-is basis. This has been changed to allow finer control through two | |
4506 | new facilities: selection and renaming. | |
4507 | ||
4508 | You can now select which of the imported module's bindings are to be | |
4509 | visible in the current module by using the `:select' clause. This | |
4510 | clause also can be used to rename individual bindings. For example: | |
4511 | ||
4512 | ;; import all bindings no questions asked | |
4513 | (use-modules (ice-9 common-list)) | |
4514 | ||
4515 | ;; import four bindings, renaming two of them; | |
4516 | ;; the current module sees: every some zonk-y zonk-n | |
4517 | (use-modules ((ice-9 common-list) | |
4518 | :select (every some | |
4519 | (remove-if . zonk-y) | |
4520 | (remove-if-not . zonk-n)))) | |
4521 | ||
4522 | You can also programmatically rename all selected bindings using the | |
4523 | `:renamer' clause, which specifies a proc that takes a symbol and | |
4524 | returns another symbol. Because it is common practice to use a prefix, | |
4525 | we now provide the convenience procedure `symbol-prefix-proc'. For | |
4526 | example: | |
4527 | ||
4528 | ;; import four bindings, renaming two of them specifically, | |
4529 | ;; and all four w/ prefix "CL:"; | |
4530 | ;; the current module sees: CL:every CL:some CL:zonk-y CL:zonk-n | |
4531 | (use-modules ((ice-9 common-list) | |
4532 | :select (every some | |
4533 | (remove-if . zonk-y) | |
4534 | (remove-if-not . zonk-n)) | |
4535 | :renamer (symbol-prefix-proc 'CL:))) | |
4536 | ||
4537 | ;; import four bindings, renaming two of them specifically, | |
4538 | ;; and all four by upcasing. | |
4539 | ;; the current module sees: EVERY SOME ZONK-Y ZONK-N | |
4540 | (define (upcase-symbol sym) | |
4541 | (string->symbol (string-upcase (symbol->string sym)))) | |
4542 | ||
4543 | (use-modules ((ice-9 common-list) | |
4544 | :select (every some | |
4545 | (remove-if . zonk-y) | |
4546 | (remove-if-not . zonk-n)) | |
4547 | :renamer upcase-symbol)) | |
4548 | ||
4549 | Note that programmatic renaming is done *after* individual renaming. | |
4550 | Also, the above examples show `use-modules', but the same facilities are | |
4551 | available for the `#:use-module' clause of `define-module'. | |
4552 | ||
4553 | See manual for more info. | |
4554 | ||
b7d69200 | 4555 | ** The semantics of guardians have changed. |
56495472 | 4556 | |
b7d69200 | 4557 | The changes are for the most part compatible. An important criterion |
6c0201ad | 4558 | was to keep the typical usage of guardians as simple as before, but to |
c0a5d888 | 4559 | make the semantics safer and (as a result) more useful. |
56495472 | 4560 | |
c0a5d888 | 4561 | *** All objects returned from guardians are now properly alive. |
56495472 | 4562 | |
c0a5d888 ML |
4563 | It is now guaranteed that any object referenced by an object returned |
4564 | from a guardian is alive. It's now impossible for a guardian to | |
4565 | return a "contained" object before its "containing" object. | |
56495472 ML |
4566 | |
4567 | One incompatible (but probably not very important) change resulting | |
4568 | from this is that it is no longer possible to guard objects that | |
4569 | indirectly reference themselves (i.e. are parts of cycles). If you do | |
4570 | so accidentally, you'll get a warning. | |
4571 | ||
c0a5d888 ML |
4572 | *** There are now two types of guardians: greedy and sharing. |
4573 | ||
4574 | If you call (make-guardian #t) or just (make-guardian), you'll get a | |
4575 | greedy guardian, and for (make-guardian #f) a sharing guardian. | |
4576 | ||
4577 | Greedy guardians are the default because they are more "defensive". | |
4578 | You can only greedily guard an object once. If you guard an object | |
4579 | more than once, once in a greedy guardian and the rest of times in | |
4580 | sharing guardians, then it is guaranteed that the object won't be | |
4581 | returned from sharing guardians as long as it is greedily guarded | |
4582 | and/or alive. | |
4583 | ||
4584 | Guardians returned by calls to `make-guardian' can now take one more | |
4585 | optional parameter, which says whether to throw an error in case an | |
4586 | attempt is made to greedily guard an object that is already greedily | |
4587 | guarded. The default is true, i.e. throw an error. If the parameter | |
4588 | is false, the guardian invocation returns #t if guarding was | |
4589 | successful and #f if it wasn't. | |
4590 | ||
4591 | Also, since greedy guarding is, in effect, a side-effecting operation | |
4592 | on objects, a new function is introduced: `destroy-guardian!'. | |
4593 | Invoking this function on a guardian renders it unoperative and, if | |
4594 | the guardian is greedy, clears the "greedily guarded" property of the | |
4595 | objects that were guarded by it, thus undoing the side effect. | |
4596 | ||
4597 | Note that all this hair is hardly very important, since guardian | |
4598 | objects are usually permanent. | |
4599 | ||
311b6a3c MV |
4600 | ** Continuations created by call-with-current-continuation now accept |
4601 | any number of arguments, as required by R5RS. | |
818febc0 | 4602 | |
c10ecc4c | 4603 | ** New function `issue-deprecation-warning' |
56426fdb | 4604 | |
311b6a3c | 4605 | This function is used to display the deprecation messages that are |
c10ecc4c | 4606 | controlled by GUILE_WARN_DEPRECATION as explained in the README. |
56426fdb KN |
4607 | |
4608 | (define (id x) | |
c10ecc4c MV |
4609 | (issue-deprecation-warning "`id' is deprecated. Use `identity' instead.") |
4610 | (identity x)) | |
56426fdb KN |
4611 | |
4612 | guile> (id 1) | |
4613 | ;; `id' is deprecated. Use `identity' instead. | |
4614 | 1 | |
4615 | guile> (id 1) | |
4616 | 1 | |
4617 | ||
c10ecc4c MV |
4618 | ** New syntax `begin-deprecated' |
4619 | ||
4620 | When deprecated features are included (as determined by the configure | |
4621 | option --enable-deprecated), `begin-deprecated' is identical to | |
4622 | `begin'. When deprecated features are excluded, it always evaluates | |
4623 | to `#f', ignoring the body forms. | |
4624 | ||
17f367e0 MV |
4625 | ** New function `make-object-property' |
4626 | ||
4627 | This function returns a new `procedure with setter' P that can be used | |
4628 | to attach a property to objects. When calling P as | |
4629 | ||
4630 | (set! (P obj) val) | |
4631 | ||
4632 | where `obj' is any kind of object, it attaches `val' to `obj' in such | |
4633 | a way that it can be retrieved by calling P as | |
4634 | ||
4635 | (P obj) | |
4636 | ||
4637 | This function will replace procedure properties, symbol properties and | |
4638 | source properties eventually. | |
4639 | ||
76ef92f3 MV |
4640 | ** Module (ice-9 optargs) now uses keywords instead of `#&'. |
4641 | ||
4642 | Instead of #&optional, #&key, etc you should now use #:optional, | |
4643 | #:key, etc. Since #:optional is a keyword, you can write it as just | |
4644 | :optional when (read-set! keywords 'prefix) is active. | |
4645 | ||
4646 | The old reader syntax `#&' is still supported, but deprecated. It | |
4647 | will be removed in the next release. | |
4648 | ||
c0997079 MD |
4649 | ** New define-module option: pure |
4650 | ||
4651 | Tells the module system not to include any bindings from the root | |
4652 | module. | |
4653 | ||
4654 | Example: | |
4655 | ||
4656 | (define-module (totally-empty-module) | |
4657 | :pure) | |
4658 | ||
4659 | ** New define-module option: export NAME1 ... | |
4660 | ||
4661 | Export names NAME1 ... | |
4662 | ||
4663 | This option is required if you want to be able to export bindings from | |
4664 | a module which doesn't import one of `define-public' or `export'. | |
4665 | ||
4666 | Example: | |
4667 | ||
311b6a3c MV |
4668 | (define-module (foo) |
4669 | :pure | |
4670 | :use-module (ice-9 r5rs) | |
4671 | :export (bar)) | |
69b5f65a | 4672 | |
311b6a3c | 4673 | ;;; Note that we're pure R5RS below this point! |
69b5f65a | 4674 | |
311b6a3c MV |
4675 | (define (bar) |
4676 | ...) | |
daa6ba18 | 4677 | |
1f3908c4 KN |
4678 | ** New function: object->string OBJ |
4679 | ||
4680 | Return a Scheme string obtained by printing a given object. | |
4681 | ||
eb5c0a2a GH |
4682 | ** New function: port? X |
4683 | ||
4684 | Returns a boolean indicating whether X is a port. Equivalent to | |
4685 | `(or (input-port? X) (output-port? X))'. | |
4686 | ||
efa40607 DH |
4687 | ** New function: file-port? |
4688 | ||
4689 | Determines whether a given object is a port that is related to a file. | |
4690 | ||
34b56ec4 GH |
4691 | ** New function: port-for-each proc |
4692 | ||
311b6a3c MV |
4693 | Apply PROC to each port in the Guile port table in turn. The return |
4694 | value is unspecified. More specifically, PROC is applied exactly once | |
4695 | to every port that exists in the system at the time PORT-FOR-EACH is | |
4696 | invoked. Changes to the port table while PORT-FOR-EACH is running | |
4697 | have no effect as far as PORT-FOR-EACH is concerned. | |
34b56ec4 GH |
4698 | |
4699 | ** New function: dup2 oldfd newfd | |
4700 | ||
4701 | A simple wrapper for the `dup2' system call. Copies the file | |
4702 | descriptor OLDFD to descriptor number NEWFD, replacing the | |
4703 | previous meaning of NEWFD. Both OLDFD and NEWFD must be integers. | |
4704 | Unlike for dup->fdes or primitive-move->fdes, no attempt is made | |
264e9cbc | 4705 | to move away ports which are using NEWFD. The return value is |
34b56ec4 GH |
4706 | unspecified. |
4707 | ||
4708 | ** New function: close-fdes fd | |
4709 | ||
4710 | A simple wrapper for the `close' system call. Close file | |
4711 | descriptor FD, which must be an integer. Unlike close (*note | |
4712 | close: Ports and File Descriptors.), the file descriptor will be | |
4713 | closed even if a port is using it. The return value is | |
4714 | unspecified. | |
4715 | ||
94e6d793 MG |
4716 | ** New function: crypt password salt |
4717 | ||
4718 | Encrypts `password' using the standard unix password encryption | |
4719 | algorithm. | |
4720 | ||
4721 | ** New function: chroot path | |
4722 | ||
4723 | Change the root directory of the running process to `path'. | |
4724 | ||
4725 | ** New functions: getlogin, cuserid | |
4726 | ||
4727 | Return the login name or the user name of the current effective user | |
4728 | id, respectively. | |
4729 | ||
4730 | ** New functions: getpriority which who, setpriority which who prio | |
4731 | ||
4732 | Get or set the priority of the running process. | |
4733 | ||
4734 | ** New function: getpass prompt | |
4735 | ||
4736 | Read a password from the terminal, first displaying `prompt' and | |
4737 | disabling echoing. | |
4738 | ||
4739 | ** New function: flock file operation | |
4740 | ||
4741 | Set/remove an advisory shared or exclusive lock on `file'. | |
4742 | ||
4743 | ** New functions: sethostname name, gethostname | |
4744 | ||
4745 | Set or get the hostname of the machine the current process is running | |
4746 | on. | |
4747 | ||
6d163216 | 4748 | ** New function: mkstemp! tmpl |
4f60cc33 | 4749 | |
6d163216 GH |
4750 | mkstemp creates a new unique file in the file system and returns a |
4751 | new buffered port open for reading and writing to the file. TMPL | |
4752 | is a string specifying where the file should be created: it must | |
4753 | end with `XXXXXX' and will be changed in place to return the name | |
4754 | of the temporary file. | |
4755 | ||
62e63ba9 MG |
4756 | ** New function: open-input-string string |
4757 | ||
4758 | Return an input string port which delivers the characters from | |
4f60cc33 | 4759 | `string'. This procedure, together with `open-output-string' and |
62e63ba9 MG |
4760 | `get-output-string' implements SRFI-6. |
4761 | ||
4762 | ** New function: open-output-string | |
4763 | ||
4764 | Return an output string port which collects all data written to it. | |
4765 | The data can then be retrieved by `get-output-string'. | |
4766 | ||
4767 | ** New function: get-output-string | |
4768 | ||
4769 | Return the contents of an output string port. | |
4770 | ||
56426fdb KN |
4771 | ** New function: identity |
4772 | ||
4773 | Return the argument. | |
4774 | ||
5bef627d GH |
4775 | ** socket, connect, accept etc., now have support for IPv6. IPv6 addresses |
4776 | are represented in Scheme as integers with normal host byte ordering. | |
4777 | ||
4778 | ** New function: inet-pton family address | |
4779 | ||
311b6a3c MV |
4780 | Convert a printable string network address into an integer. Note that |
4781 | unlike the C version of this function, the result is an integer with | |
4782 | normal host byte ordering. FAMILY can be `AF_INET' or `AF_INET6'. | |
4783 | e.g., | |
4784 | ||
4785 | (inet-pton AF_INET "127.0.0.1") => 2130706433 | |
4786 | (inet-pton AF_INET6 "::1") => 1 | |
5bef627d GH |
4787 | |
4788 | ** New function: inet-ntop family address | |
4789 | ||
311b6a3c MV |
4790 | Convert an integer network address into a printable string. Note that |
4791 | unlike the C version of this function, the input is an integer with | |
4792 | normal host byte ordering. FAMILY can be `AF_INET' or `AF_INET6'. | |
4793 | e.g., | |
4794 | ||
4795 | (inet-ntop AF_INET 2130706433) => "127.0.0.1" | |
4796 | (inet-ntop AF_INET6 (- (expt 2 128) 1)) => | |
5bef627d GH |
4797 | ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff |
4798 | ||
56426fdb KN |
4799 | ** Deprecated: id |
4800 | ||
4801 | Use `identity' instead. | |
4802 | ||
5cd06d5e DH |
4803 | ** Deprecated: -1+ |
4804 | ||
4805 | Use `1-' instead. | |
4806 | ||
4807 | ** Deprecated: return-it | |
4808 | ||
311b6a3c | 4809 | Do without it. |
5cd06d5e DH |
4810 | |
4811 | ** Deprecated: string-character-length | |
4812 | ||
4813 | Use `string-length' instead. | |
4814 | ||
4815 | ** Deprecated: flags | |
4816 | ||
4817 | Use `logior' instead. | |
4818 | ||
4f60cc33 NJ |
4819 | ** Deprecated: close-all-ports-except. |
4820 | ||
4821 | This was intended for closing ports in a child process after a fork, | |
4822 | but it has the undesirable side effect of flushing buffers. | |
4823 | port-for-each is more flexible. | |
34b56ec4 GH |
4824 | |
4825 | ** The (ice-9 popen) module now attempts to set up file descriptors in | |
4826 | the child process from the current Scheme ports, instead of using the | |
4827 | current values of file descriptors 0, 1, and 2 in the parent process. | |
4828 | ||
b52e071b DH |
4829 | ** Removed function: builtin-weak-bindings |
4830 | ||
4831 | There is no such concept as a weak binding any more. | |
4832 | ||
9d774814 | 4833 | ** Removed constants: bignum-radix, scm-line-incrementors |
0f979f3f | 4834 | |
7d435120 MD |
4835 | ** define-method: New syntax mandatory. |
4836 | ||
4837 | The new method syntax is now mandatory: | |
4838 | ||
4839 | (define-method (NAME ARG-SPEC ...) BODY ...) | |
4840 | (define-method (NAME ARG-SPEC ... . REST-ARG) BODY ...) | |
4841 | ||
4842 | ARG-SPEC ::= ARG-NAME | (ARG-NAME TYPE) | |
4843 | REST-ARG ::= ARG-NAME | |
4844 | ||
4845 | If you have old code using the old syntax, import | |
4846 | (oop goops old-define-method) before (oop goops) as in: | |
4847 | ||
4848 | (use-modules (oop goops old-define-method) (oop goops)) | |
4849 | ||
f3f9dcbc MV |
4850 | ** Deprecated function: builtin-variable |
4851 | Removed function: builtin-bindings | |
4852 | ||
4853 | There is no longer a distinction between builtin or other variables. | |
4854 | Use module system operations for all variables. | |
4855 | ||
311b6a3c MV |
4856 | ** Lazy-catch handlers are no longer allowed to return. |
4857 | ||
4858 | That is, a call to `throw', `error', etc is now guaranteed to not | |
4859 | return. | |
4860 | ||
a583bf1e | 4861 | ** Bugfixes for (ice-9 getopt-long) |
8c84b81e | 4862 | |
a583bf1e TTN |
4863 | This module is now tested using test-suite/tests/getopt-long.test. |
4864 | The following bugs have been fixed: | |
4865 | ||
4866 | *** Parsing for options that are specified to have `optional' args now checks | |
4867 | if the next element is an option instead of unconditionally taking it as the | |
8c84b81e TTN |
4868 | option arg. |
4869 | ||
a583bf1e TTN |
4870 | *** An error is now thrown for `--opt=val' when the option description |
4871 | does not specify `(value #t)' or `(value optional)'. This condition used to | |
4872 | be accepted w/o error, contrary to the documentation. | |
4873 | ||
4874 | *** The error message for unrecognized options is now more informative. | |
4875 | It used to be "not a record", an artifact of the implementation. | |
4876 | ||
4877 | *** The error message for `--opt' terminating the arg list (no value), when | |
4878 | `(value #t)' is specified, is now more informative. It used to be "not enough | |
4879 | args". | |
4880 | ||
4881 | *** "Clumped" single-char args now preserve trailing string, use it as arg. | |
4882 | The expansion used to be like so: | |
4883 | ||
4884 | ("-abc5d" "--xyz") => ("-a" "-b" "-c" "--xyz") | |
4885 | ||
4886 | Note that the "5d" is dropped. Now it is like so: | |
4887 | ||
4888 | ("-abc5d" "--xyz") => ("-a" "-b" "-c" "5d" "--xyz") | |
4889 | ||
4890 | This enables single-char options to have adjoining arguments as long as their | |
4891 | constituent characters are not potential single-char options. | |
8c84b81e | 4892 | |
998bfc70 TTN |
4893 | ** (ice-9 session) procedure `arity' now works with (ice-9 optargs) `lambda*' |
4894 | ||
4895 | The `lambda*' and derivative forms in (ice-9 optargs) now set a procedure | |
4896 | property `arglist', which can be retrieved by `arity'. The result is that | |
4897 | `arity' can give more detailed information than before: | |
4898 | ||
4899 | Before: | |
4900 | ||
4901 | guile> (use-modules (ice-9 optargs)) | |
4902 | guile> (define* (foo #:optional a b c) a) | |
4903 | guile> (arity foo) | |
4904 | 0 or more arguments in `lambda*:G0'. | |
4905 | ||
4906 | After: | |
4907 | ||
4908 | guile> (arity foo) | |
4909 | 3 optional arguments: `a', `b' and `c'. | |
4910 | guile> (define* (bar a b #:key c d #:allow-other-keys) a) | |
4911 | guile> (arity bar) | |
4912 | 2 required arguments: `a' and `b', 2 keyword arguments: `c' | |
4913 | and `d', other keywords allowed. | |
4914 | guile> (define* (baz a b #:optional c #:rest r) a) | |
4915 | guile> (arity baz) | |
4916 | 2 required arguments: `a' and `b', 1 optional argument: `c', | |
4917 | the rest in `r'. | |
4918 | ||
311b6a3c MV |
4919 | * Changes to the C interface |
4920 | ||
c81c130e MV |
4921 | ** Types have been renamed from scm_*_t to scm_t_*. |
4922 | ||
4923 | This has been done for POSIX sake. It reserves identifiers ending | |
4924 | with "_t". What a concept. | |
4925 | ||
4926 | The old names are still available with status `deprecated'. | |
4927 | ||
4928 | ** scm_t_bits (former scm_bits_t) is now a unsigned type. | |
4929 | ||
6e9382f1 | 4930 | ** Deprecated features have been removed. |
e6c9e497 MV |
4931 | |
4932 | *** Macros removed | |
4933 | ||
4934 | SCM_INPORTP, SCM_OUTPORTP SCM_ICHRP, SCM_ICHR, SCM_MAKICHR | |
4935 | SCM_SETJMPBUF SCM_NSTRINGP SCM_NRWSTRINGP SCM_NVECTORP SCM_DOUBLE_CELLP | |
4936 | ||
4937 | *** C Functions removed | |
4938 | ||
4939 | scm_sysmissing scm_tag scm_tc16_flo scm_tc_flo | |
4940 | scm_fseek - replaced by scm_seek. | |
4941 | gc-thunk - replaced by after-gc-hook. | |
4942 | gh_int2scmb - replaced by gh_bool2scm. | |
4943 | scm_tc_dblr - replaced by scm_tc16_real. | |
4944 | scm_tc_dblc - replaced by scm_tc16_complex. | |
4945 | scm_list_star - replaced by scm_cons_star. | |
4946 | ||
36284627 DH |
4947 | ** Deprecated: scm_makfromstr |
4948 | ||
4949 | Use scm_mem2string instead. | |
4950 | ||
311b6a3c MV |
4951 | ** Deprecated: scm_make_shared_substring |
4952 | ||
4953 | Explicit shared substrings will disappear from Guile. | |
4954 | ||
4955 | Instead, "normal" strings will be implemented using sharing | |
4956 | internally, combined with a copy-on-write strategy. | |
4957 | ||
4958 | ** Deprecated: scm_read_only_string_p | |
4959 | ||
4960 | The concept of read-only strings will disappear in next release of | |
4961 | Guile. | |
4962 | ||
4963 | ** Deprecated: scm_sloppy_memq, scm_sloppy_memv, scm_sloppy_member | |
c299f186 | 4964 | |
311b6a3c | 4965 | Instead, use scm_c_memq or scm_memq, scm_memv, scm_member. |
c299f186 | 4966 | |
dd0e04ed KN |
4967 | ** New functions: scm_call_0, scm_call_1, scm_call_2, scm_call_3 |
4968 | ||
83dbedcc KR |
4969 | Call a procedure with the indicated number of arguments. See "Fly |
4970 | Evaluation" in the manual. | |
dd0e04ed KN |
4971 | |
4972 | ** New functions: scm_apply_0, scm_apply_1, scm_apply_2, scm_apply_3 | |
4973 | ||
83dbedcc KR |
4974 | Call a procedure with the indicated number of arguments and a list of |
4975 | further arguments. See "Fly Evaluation" in the manual. | |
dd0e04ed | 4976 | |
e235f2a6 KN |
4977 | ** New functions: scm_list_1, scm_list_2, scm_list_3, scm_list_4, scm_list_5 |
4978 | ||
83dbedcc KR |
4979 | Create a list of the given number of elements. See "List |
4980 | Constructors" in the manual. | |
e235f2a6 KN |
4981 | |
4982 | ** Renamed function: scm_listify has been replaced by scm_list_n. | |
4983 | ||
4984 | ** Deprecated macros: SCM_LIST0, SCM_LIST1, SCM_LIST2, SCM_LIST3, SCM_LIST4, | |
4985 | SCM_LIST5, SCM_LIST6, SCM_LIST7, SCM_LIST8, SCM_LIST9. | |
4986 | ||
4987 | Use functions scm_list_N instead. | |
4988 | ||
6fe692e9 MD |
4989 | ** New function: scm_c_read (SCM port, void *buffer, scm_sizet size) |
4990 | ||
4991 | Used by an application to read arbitrary number of bytes from a port. | |
4992 | Same semantics as libc read, except that scm_c_read only returns less | |
4993 | than SIZE bytes if at end-of-file. | |
4994 | ||
4995 | Warning: Doesn't update port line and column counts! | |
4996 | ||
4997 | ** New function: scm_c_write (SCM port, const void *ptr, scm_sizet size) | |
4998 | ||
4999 | Used by an application to write arbitrary number of bytes to an SCM | |
5000 | port. Similar semantics as libc write. However, unlike libc | |
5001 | write, scm_c_write writes the requested number of bytes and has no | |
5002 | return value. | |
5003 | ||
5004 | Warning: Doesn't update port line and column counts! | |
5005 | ||
17f367e0 MV |
5006 | ** New function: scm_init_guile () |
5007 | ||
5008 | In contrast to scm_boot_guile, scm_init_guile will return normally | |
5009 | after initializing Guile. It is not available on all systems, tho. | |
5010 | ||
23ade5e7 DH |
5011 | ** New functions: scm_str2symbol, scm_mem2symbol |
5012 | ||
5013 | The function scm_str2symbol takes a const char* pointing to a zero-terminated | |
5014 | field of characters and creates a scheme symbol object from that C string. | |
5015 | The function scm_mem2symbol takes a const char* and a number of characters and | |
5016 | creates a symbol from the characters in that memory area. | |
5017 | ||
17f367e0 MV |
5018 | ** New functions: scm_primitive_make_property |
5019 | scm_primitive_property_ref | |
5020 | scm_primitive_property_set_x | |
5021 | scm_primitive_property_del_x | |
5022 | ||
5023 | These functions implement a new way to deal with object properties. | |
5024 | See libguile/properties.c for their documentation. | |
5025 | ||
9d47a1e6 ML |
5026 | ** New function: scm_done_free (long size) |
5027 | ||
5028 | This function is the inverse of scm_done_malloc. Use it to report the | |
5029 | amount of smob memory you free. The previous method, which involved | |
5030 | calling scm_done_malloc with negative argument, was somewhat | |
5031 | unintuitive (and is still available, of course). | |
5032 | ||
79a3dafe DH |
5033 | ** New function: scm_c_memq (SCM obj, SCM list) |
5034 | ||
5035 | This function provides a fast C level alternative for scm_memq for the case | |
5036 | that the list parameter is known to be a proper list. The function is a | |
5037 | replacement for scm_sloppy_memq, but is stricter in its requirements on its | |
5038 | list input parameter, since for anything else but a proper list the function's | |
5039 | behaviour is undefined - it may even crash or loop endlessly. Further, for | |
5040 | the case that the object is not found in the list, scm_c_memq returns #f which | |
5041 | is similar to scm_memq, but different from scm_sloppy_memq's behaviour. | |
5042 | ||
6c0201ad | 5043 | ** New functions: scm_remember_upto_here_1, scm_remember_upto_here_2, |
5d2b97cd DH |
5044 | scm_remember_upto_here |
5045 | ||
5046 | These functions replace the function scm_remember. | |
5047 | ||
5048 | ** Deprecated function: scm_remember | |
5049 | ||
5050 | Use one of the new functions scm_remember_upto_here_1, | |
5051 | scm_remember_upto_here_2 or scm_remember_upto_here instead. | |
5052 | ||
be54b15d DH |
5053 | ** New function: scm_allocate_string |
5054 | ||
5055 | This function replaces the function scm_makstr. | |
5056 | ||
5057 | ** Deprecated function: scm_makstr | |
5058 | ||
5059 | Use the new function scm_allocate_string instead. | |
5060 | ||
32d0d4b1 DH |
5061 | ** New global variable scm_gc_running_p introduced. |
5062 | ||
5063 | Use this variable to find out if garbage collection is being executed. Up to | |
5064 | now applications have used scm_gc_heap_lock to test if garbage collection was | |
5065 | running, which also works because of the fact that up to know only the garbage | |
5066 | collector has set this variable. But, this is an implementation detail that | |
5067 | may change. Further, scm_gc_heap_lock is not set throughout gc, thus the use | |
5068 | of this variable is (and has been) not fully safe anyway. | |
5069 | ||
5b9eb8ae DH |
5070 | ** New macros: SCM_BITVECTOR_MAX_LENGTH, SCM_UVECTOR_MAX_LENGTH |
5071 | ||
5072 | Use these instead of SCM_LENGTH_MAX. | |
5073 | ||
6c0201ad | 5074 | ** New macros: SCM_CONTINUATION_LENGTH, SCM_CCLO_LENGTH, SCM_STACK_LENGTH, |
a6d9e5ab DH |
5075 | SCM_STRING_LENGTH, SCM_SYMBOL_LENGTH, SCM_UVECTOR_LENGTH, |
5076 | SCM_BITVECTOR_LENGTH, SCM_VECTOR_LENGTH. | |
5077 | ||
5078 | Use these instead of SCM_LENGTH. | |
5079 | ||
6c0201ad | 5080 | ** New macros: SCM_SET_CONTINUATION_LENGTH, SCM_SET_STRING_LENGTH, |
93778877 DH |
5081 | SCM_SET_SYMBOL_LENGTH, SCM_SET_VECTOR_LENGTH, SCM_SET_UVECTOR_LENGTH, |
5082 | SCM_SET_BITVECTOR_LENGTH | |
bc0eaf7b DH |
5083 | |
5084 | Use these instead of SCM_SETLENGTH | |
5085 | ||
6c0201ad | 5086 | ** New macros: SCM_STRING_CHARS, SCM_SYMBOL_CHARS, SCM_CCLO_BASE, |
a6d9e5ab DH |
5087 | SCM_VECTOR_BASE, SCM_UVECTOR_BASE, SCM_BITVECTOR_BASE, SCM_COMPLEX_MEM, |
5088 | SCM_ARRAY_MEM | |
5089 | ||
e51fe79c DH |
5090 | Use these instead of SCM_CHARS, SCM_UCHARS, SCM_ROCHARS, SCM_ROUCHARS or |
5091 | SCM_VELTS. | |
a6d9e5ab | 5092 | |
6c0201ad | 5093 | ** New macros: SCM_SET_BIGNUM_BASE, SCM_SET_STRING_CHARS, |
6a0476fd DH |
5094 | SCM_SET_SYMBOL_CHARS, SCM_SET_UVECTOR_BASE, SCM_SET_BITVECTOR_BASE, |
5095 | SCM_SET_VECTOR_BASE | |
5096 | ||
5097 | Use these instead of SCM_SETCHARS. | |
5098 | ||
a6d9e5ab DH |
5099 | ** New macro: SCM_BITVECTOR_P |
5100 | ||
5101 | ** New macro: SCM_STRING_COERCE_0TERMINATION_X | |
5102 | ||
5103 | Use instead of SCM_COERCE_SUBSTR. | |
5104 | ||
30ea841d DH |
5105 | ** New macros: SCM_DIR_OPEN_P, SCM_DIR_FLAG_OPEN |
5106 | ||
5107 | For directory objects, use these instead of SCM_OPDIRP and SCM_OPN. | |
5108 | ||
6c0201ad TTN |
5109 | ** Deprecated macros: SCM_OUTOFRANGE, SCM_NALLOC, SCM_HUP_SIGNAL, |
5110 | SCM_INT_SIGNAL, SCM_FPE_SIGNAL, SCM_BUS_SIGNAL, SCM_SEGV_SIGNAL, | |
5111 | SCM_ALRM_SIGNAL, SCM_GC_SIGNAL, SCM_TICK_SIGNAL, SCM_SIG_ORD, | |
d1ca2c64 | 5112 | SCM_ORD_SIG, SCM_NUM_SIGS, SCM_SYMBOL_SLOTS, SCM_SLOTS, SCM_SLOPPY_STRINGP, |
a6d9e5ab DH |
5113 | SCM_VALIDATE_STRINGORSUBSTR, SCM_FREEP, SCM_NFREEP, SCM_CHARS, SCM_UCHARS, |
5114 | SCM_VALIDATE_ROSTRING, SCM_VALIDATE_ROSTRING_COPY, | |
5115 | SCM_VALIDATE_NULLORROSTRING_COPY, SCM_ROLENGTH, SCM_LENGTH, SCM_HUGE_LENGTH, | |
b24b5e13 | 5116 | SCM_SUBSTRP, SCM_SUBSTR_STR, SCM_SUBSTR_OFFSET, SCM_COERCE_SUBSTR, |
34f0f2b8 | 5117 | SCM_ROSTRINGP, SCM_RWSTRINGP, SCM_VALIDATE_RWSTRING, SCM_ROCHARS, |
fd336365 | 5118 | SCM_ROUCHARS, SCM_SETLENGTH, SCM_SETCHARS, SCM_LENGTH_MAX, SCM_GC8MARKP, |
30ea841d | 5119 | SCM_SETGC8MARK, SCM_CLRGC8MARK, SCM_GCTYP16, SCM_GCCDR, SCM_SUBR_DOC, |
b3fcac34 DH |
5120 | SCM_OPDIRP, SCM_VALIDATE_OPDIR, SCM_WTA, RETURN_SCM_WTA, SCM_CONST_LONG, |
5121 | SCM_WNA, SCM_FUNC_NAME, SCM_VALIDATE_NUMBER_COPY, | |
61045190 | 5122 | SCM_VALIDATE_NUMBER_DEF_COPY, SCM_SLOPPY_CONSP, SCM_SLOPPY_NCONSP, |
e038c042 | 5123 | SCM_SETAND_CDR, SCM_SETOR_CDR, SCM_SETAND_CAR, SCM_SETOR_CAR |
b63a956d DH |
5124 | |
5125 | Use SCM_ASSERT_RANGE or SCM_VALIDATE_XXX_RANGE instead of SCM_OUTOFRANGE. | |
5126 | Use scm_memory_error instead of SCM_NALLOC. | |
c1aef037 | 5127 | Use SCM_STRINGP instead of SCM_SLOPPY_STRINGP. |
d1ca2c64 DH |
5128 | Use SCM_VALIDATE_STRING instead of SCM_VALIDATE_STRINGORSUBSTR. |
5129 | Use SCM_FREE_CELL_P instead of SCM_FREEP/SCM_NFREEP | |
a6d9e5ab | 5130 | Use a type specific accessor macro instead of SCM_CHARS/SCM_UCHARS. |
6c0201ad | 5131 | Use a type specific accessor instead of SCM(_|_RO|_HUGE_)LENGTH. |
a6d9e5ab DH |
5132 | Use SCM_VALIDATE_(SYMBOL|STRING) instead of SCM_VALIDATE_ROSTRING. |
5133 | Use SCM_STRING_COERCE_0TERMINATION_X instead of SCM_COERCE_SUBSTR. | |
b24b5e13 | 5134 | Use SCM_STRINGP or SCM_SYMBOLP instead of SCM_ROSTRINGP. |
f0942910 DH |
5135 | Use SCM_STRINGP instead of SCM_RWSTRINGP. |
5136 | Use SCM_VALIDATE_STRING instead of SCM_VALIDATE_RWSTRING. | |
34f0f2b8 DH |
5137 | Use SCM_STRING_CHARS instead of SCM_ROCHARS. |
5138 | Use SCM_STRING_UCHARS instead of SCM_ROUCHARS. | |
93778877 | 5139 | Use a type specific setter macro instead of SCM_SETLENGTH. |
6a0476fd | 5140 | Use a type specific setter macro instead of SCM_SETCHARS. |
5b9eb8ae | 5141 | Use a type specific length macro instead of SCM_LENGTH_MAX. |
fd336365 DH |
5142 | Use SCM_GCMARKP instead of SCM_GC8MARKP. |
5143 | Use SCM_SETGCMARK instead of SCM_SETGC8MARK. | |
5144 | Use SCM_CLRGCMARK instead of SCM_CLRGC8MARK. | |
5145 | Use SCM_TYP16 instead of SCM_GCTYP16. | |
5146 | Use SCM_CDR instead of SCM_GCCDR. | |
30ea841d | 5147 | Use SCM_DIR_OPEN_P instead of SCM_OPDIRP. |
276dd677 DH |
5148 | Use SCM_MISC_ERROR or SCM_WRONG_TYPE_ARG instead of SCM_WTA. |
5149 | Use SCM_MISC_ERROR or SCM_WRONG_TYPE_ARG instead of RETURN_SCM_WTA. | |
8dea8611 | 5150 | Use SCM_VCELL_INIT instead of SCM_CONST_LONG. |
b3fcac34 | 5151 | Use SCM_WRONG_NUM_ARGS instead of SCM_WNA. |
ced99e92 DH |
5152 | Use SCM_CONSP instead of SCM_SLOPPY_CONSP. |
5153 | Use !SCM_CONSP instead of SCM_SLOPPY_NCONSP. | |
b63a956d | 5154 | |
f7620510 DH |
5155 | ** Removed function: scm_struct_init |
5156 | ||
93d40df2 DH |
5157 | ** Removed variable: scm_symhash_dim |
5158 | ||
818febc0 GH |
5159 | ** Renamed function: scm_make_cont has been replaced by |
5160 | scm_make_continuation, which has a different interface. | |
5161 | ||
cc4feeca DH |
5162 | ** Deprecated function: scm_call_catching_errors |
5163 | ||
5164 | Use scm_catch or scm_lazy_catch from throw.[ch] instead. | |
5165 | ||
28b06554 DH |
5166 | ** Deprecated function: scm_strhash |
5167 | ||
5168 | Use scm_string_hash instead. | |
5169 | ||
1b9be268 DH |
5170 | ** Deprecated function: scm_vector_set_length_x |
5171 | ||
5172 | Instead, create a fresh vector of the desired size and copy the contents. | |
5173 | ||
302f229e MD |
5174 | ** scm_gensym has changed prototype |
5175 | ||
5176 | scm_gensym now only takes one argument. | |
5177 | ||
1660782e DH |
5178 | ** Deprecated type tags: scm_tc7_ssymbol, scm_tc7_msymbol, scm_tcs_symbols, |
5179 | scm_tc7_lvector | |
28b06554 DH |
5180 | |
5181 | There is now only a single symbol type scm_tc7_symbol. | |
1660782e | 5182 | The tag scm_tc7_lvector was not used anyway. |
28b06554 | 5183 | |
2f6fb7c5 KN |
5184 | ** Deprecated function: scm_make_smob_type_mfpe, scm_set_smob_mfpe. |
5185 | ||
5186 | Use scm_make_smob_type and scm_set_smob_XXX instead. | |
5187 | ||
5188 | ** New function scm_set_smob_apply. | |
5189 | ||
5190 | This can be used to set an apply function to a smob type. | |
5191 | ||
1f3908c4 KN |
5192 | ** Deprecated function: scm_strprint_obj |
5193 | ||
5194 | Use scm_object_to_string instead. | |
5195 | ||
b3fcac34 DH |
5196 | ** Deprecated function: scm_wta |
5197 | ||
5198 | Use scm_wrong_type_arg, or another appropriate error signalling function | |
5199 | instead. | |
5200 | ||
f3f9dcbc MV |
5201 | ** Explicit support for obarrays has been deprecated. |
5202 | ||
5203 | Use `scm_str2symbol' and the generic hashtable functions instead. | |
5204 | ||
5205 | ** The concept of `vcells' has been deprecated. | |
5206 | ||
5207 | The data type `variable' is now used exclusively. `Vcells' have been | |
5208 | a low-level concept so you are likely not affected by this change. | |
5209 | ||
5210 | *** Deprecated functions: scm_sym2vcell, scm_sysintern, | |
5211 | scm_sysintern0, scm_symbol_value0, scm_intern, scm_intern0. | |
5212 | ||
5213 | Use scm_c_define or scm_c_lookup instead, as appropriate. | |
5214 | ||
5215 | *** New functions: scm_c_module_lookup, scm_c_lookup, | |
5216 | scm_c_module_define, scm_c_define, scm_module_lookup, scm_lookup, | |
5217 | scm_module_define, scm_define. | |
5218 | ||
5219 | These functions work with variables instead of with vcells. | |
5220 | ||
311b6a3c MV |
5221 | ** New functions for creating and defining `subr's and `gsubr's. |
5222 | ||
5223 | The new functions more clearly distinguish between creating a subr (or | |
5224 | gsubr) object and adding it to the current module. | |
5225 | ||
5226 | These new functions are available: scm_c_make_subr, scm_c_define_subr, | |
5227 | scm_c_make_subr_with_generic, scm_c_define_subr_with_generic, | |
5228 | scm_c_make_gsubr, scm_c_define_gsubr, scm_c_make_gsubr_with_generic, | |
5229 | scm_c_define_gsubr_with_generic. | |
5230 | ||
5231 | ** Deprecated functions: scm_make_subr, scm_make_subr_opt, | |
5232 | scm_make_subr_with_generic, scm_make_gsubr, | |
5233 | scm_make_gsubr_with_generic. | |
5234 | ||
5235 | Use the new ones from above instead. | |
5236 | ||
5237 | ** C interface to the module system has changed. | |
5238 | ||
5239 | While we suggest that you avoid as many explicit module system | |
5240 | operations from C as possible for the time being, the C interface has | |
5241 | been made more similar to the high-level Scheme module system. | |
5242 | ||
5243 | *** New functions: scm_c_define_module, scm_c_use_module, | |
5244 | scm_c_export, scm_c_resolve_module. | |
5245 | ||
5246 | They mostly work like their Scheme namesakes. scm_c_define_module | |
5247 | takes a function that is called a context where the new module is | |
5248 | current. | |
5249 | ||
5250 | *** Deprecated functions: scm_the_root_module, scm_make_module, | |
5251 | scm_ensure_user_module, scm_load_scheme_module. | |
5252 | ||
5253 | Use the new functions instead. | |
5254 | ||
5255 | ** Renamed function: scm_internal_with_fluids becomes | |
5256 | scm_c_with_fluids. | |
5257 | ||
5258 | scm_internal_with_fluids is available as a deprecated function. | |
5259 | ||
5260 | ** New function: scm_c_with_fluid. | |
5261 | ||
5262 | Just like scm_c_with_fluids, but takes one fluid and one value instead | |
5263 | of lists of same. | |
5264 | ||
1be6b49c ML |
5265 | ** Deprecated typedefs: long_long, ulong_long. |
5266 | ||
5267 | They are of questionable utility and they pollute the global | |
5268 | namespace. | |
5269 | ||
1be6b49c ML |
5270 | ** Deprecated typedef: scm_sizet |
5271 | ||
5272 | It is of questionable utility now that Guile requires ANSI C, and is | |
5273 | oddly named. | |
5274 | ||
5275 | ** Deprecated typedefs: scm_port_rw_active, scm_port, | |
5276 | scm_ptob_descriptor, scm_debug_info, scm_debug_frame, scm_fport, | |
5277 | scm_option, scm_rstate, scm_rng, scm_array, scm_array_dim. | |
5278 | ||
5279 | Made more compliant with the naming policy by adding a _t at the end. | |
5280 | ||
5281 | ** Deprecated functions: scm_mkbig, scm_big2num, scm_adjbig, | |
5282 | scm_normbig, scm_copybig, scm_2ulong2big, scm_dbl2big, scm_big2dbl | |
5283 | ||
373f4948 | 5284 | With the exception of the mysterious scm_2ulong2big, they are still |
1be6b49c ML |
5285 | available under new names (scm_i_mkbig etc). These functions are not |
5286 | intended to be used in user code. You should avoid dealing with | |
5287 | bignums directly, and should deal with numbers in general (which can | |
5288 | be bignums). | |
5289 | ||
147c18a0 MD |
5290 | ** Change in behavior: scm_num2long, scm_num2ulong |
5291 | ||
5292 | The scm_num2[u]long functions don't any longer accept an inexact | |
5293 | argument. This change in behavior is motivated by concordance with | |
5294 | R5RS: It is more common that a primitive doesn't want to accept an | |
5295 | inexact for an exact. | |
5296 | ||
1be6b49c | 5297 | ** New functions: scm_short2num, scm_ushort2num, scm_int2num, |
f3f70257 ML |
5298 | scm_uint2num, scm_size2num, scm_ptrdiff2num, scm_num2short, |
5299 | scm_num2ushort, scm_num2int, scm_num2uint, scm_num2ptrdiff, | |
1be6b49c ML |
5300 | scm_num2size. |
5301 | ||
5302 | These are conversion functions between the various ANSI C integral | |
147c18a0 MD |
5303 | types and Scheme numbers. NOTE: The scm_num2xxx functions don't |
5304 | accept an inexact argument. | |
1be6b49c | 5305 | |
5437598b MD |
5306 | ** New functions: scm_float2num, scm_double2num, |
5307 | scm_num2float, scm_num2double. | |
5308 | ||
5309 | These are conversion functions between the two ANSI C float types and | |
5310 | Scheme numbers. | |
5311 | ||
1be6b49c | 5312 | ** New number validation macros: |
f3f70257 | 5313 | SCM_NUM2{SIZE,PTRDIFF,SHORT,USHORT,INT,UINT}[_DEF] |
1be6b49c ML |
5314 | |
5315 | See above. | |
5316 | ||
fc62c86a ML |
5317 | ** New functions: scm_gc_protect_object, scm_gc_unprotect_object |
5318 | ||
5319 | These are just nicer-named old scm_protect_object and | |
5320 | scm_unprotect_object. | |
5321 | ||
5322 | ** Deprecated functions: scm_protect_object, scm_unprotect_object | |
5323 | ||
5324 | ** New functions: scm_gc_[un]register_root, scm_gc_[un]register_roots | |
5325 | ||
5326 | These functions can be used to register pointers to locations that | |
5327 | hold SCM values. | |
5328 | ||
5b2ad23b ML |
5329 | ** Deprecated function: scm_create_hook. |
5330 | ||
5331 | Its sins are: misleading name, non-modularity and lack of general | |
5332 | usefulness. | |
5333 | ||
c299f186 | 5334 | \f |
cc36e791 JB |
5335 | Changes since Guile 1.3.4: |
5336 | ||
80f27102 JB |
5337 | * Changes to the distribution |
5338 | ||
ce358662 JB |
5339 | ** Trees from nightly snapshots and CVS now require you to run autogen.sh. |
5340 | ||
5341 | We've changed the way we handle generated files in the Guile source | |
5342 | repository. As a result, the procedure for building trees obtained | |
5343 | from the nightly FTP snapshots or via CVS has changed: | |
5344 | - You must have appropriate versions of autoconf, automake, and | |
5345 | libtool installed on your system. See README for info on how to | |
5346 | obtain these programs. | |
5347 | - Before configuring the tree, you must first run the script | |
5348 | `autogen.sh' at the top of the source tree. | |
5349 | ||
5350 | The Guile repository used to contain not only source files, written by | |
5351 | humans, but also some generated files, like configure scripts and | |
5352 | Makefile.in files. Even though the contents of these files could be | |
5353 | derived mechanically from other files present, we thought it would | |
5354 | make the tree easier to build if we checked them into CVS. | |
5355 | ||
5356 | However, this approach means that minor differences between | |
5357 | developer's installed tools and habits affected the whole team. | |
5358 | So we have removed the generated files from the repository, and | |
5359 | added the autogen.sh script, which will reconstruct them | |
5360 | appropriately. | |
5361 | ||
5362 | ||
dc914156 GH |
5363 | ** configure now has experimental options to remove support for certain |
5364 | features: | |
52cfc69b | 5365 | |
dc914156 GH |
5366 | --disable-arrays omit array and uniform array support |
5367 | --disable-posix omit posix interfaces | |
5368 | --disable-networking omit networking interfaces | |
5369 | --disable-regex omit regular expression interfaces | |
52cfc69b GH |
5370 | |
5371 | These are likely to become separate modules some day. | |
5372 | ||
9764c29b | 5373 | ** New configure option --enable-debug-freelist |
e1b0d0ac | 5374 | |
38a15cfd GB |
5375 | This enables a debugging version of SCM_NEWCELL(), and also registers |
5376 | an extra primitive, the setter `gc-set-debug-check-freelist!'. | |
5377 | ||
5378 | Configure with the --enable-debug-freelist option to enable | |
5379 | the gc-set-debug-check-freelist! primitive, and then use: | |
5380 | ||
5381 | (gc-set-debug-check-freelist! #t) # turn on checking of the freelist | |
5382 | (gc-set-debug-check-freelist! #f) # turn off checking | |
5383 | ||
5384 | Checking of the freelist forces a traversal of the freelist and | |
5385 | a garbage collection before each allocation of a cell. This can | |
5386 | slow down the interpreter dramatically, so the setter should be used to | |
5387 | turn on this extra processing only when necessary. | |
e1b0d0ac | 5388 | |
9764c29b MD |
5389 | ** New configure option --enable-debug-malloc |
5390 | ||
5391 | Include code for debugging of calls to scm_must_malloc/realloc/free. | |
5392 | ||
5393 | Checks that | |
5394 | ||
5395 | 1. objects freed by scm_must_free has been mallocated by scm_must_malloc | |
5396 | 2. objects reallocated by scm_must_realloc has been allocated by | |
5397 | scm_must_malloc | |
5398 | 3. reallocated objects are reallocated with the same what string | |
5399 | ||
5400 | But, most importantly, it records the number of allocated objects of | |
5401 | each kind. This is useful when searching for memory leaks. | |
5402 | ||
5403 | A Guile compiled with this option provides the primitive | |
5404 | `malloc-stats' which returns an alist with pairs of kind and the | |
5405 | number of objects of that kind. | |
5406 | ||
e415cb06 MD |
5407 | ** All includes are now referenced relative to the root directory |
5408 | ||
5409 | Since some users have had problems with mixups between Guile and | |
5410 | system headers, we have decided to always refer to Guile headers via | |
5411 | their parent directories. This essentially creates a "private name | |
5412 | space" for Guile headers. This means that the compiler only is given | |
5413 | -I options for the root build and root source directory. | |
5414 | ||
341f78c9 MD |
5415 | ** Header files kw.h and genio.h have been removed. |
5416 | ||
5417 | ** The module (ice-9 getopt-gnu-style) has been removed. | |
5418 | ||
e8855f8d MD |
5419 | ** New module (ice-9 documentation) |
5420 | ||
5421 | Implements the interface to documentation strings associated with | |
5422 | objects. | |
5423 | ||
0c0ffe09 KN |
5424 | ** New module (ice-9 time) |
5425 | ||
5426 | Provides a macro `time', which displays execution time of a given form. | |
5427 | ||
cf7a5ee5 KN |
5428 | ** New module (ice-9 history) |
5429 | ||
5430 | Loading this module enables value history in the repl. | |
5431 | ||
0af43c4a | 5432 | * Changes to the stand-alone interpreter |
bd9e24b3 | 5433 | |
67ef2dca MD |
5434 | ** New command line option --debug |
5435 | ||
5436 | Start Guile with debugging evaluator and backtraces enabled. | |
5437 | ||
5438 | This is useful when debugging your .guile init file or scripts. | |
5439 | ||
aa4bb95d MD |
5440 | ** New help facility |
5441 | ||
341f78c9 MD |
5442 | Usage: (help NAME) gives documentation about objects named NAME (a symbol) |
5443 | (help REGEXP) ditto for objects with names matching REGEXP (a string) | |
58e5b910 | 5444 | (help 'NAME) gives documentation for NAME, even if it is not an object |
341f78c9 | 5445 | (help ,EXPR) gives documentation for object returned by EXPR |
6c0201ad | 5446 | (help (my module)) gives module commentary for `(my module)' |
341f78c9 MD |
5447 | (help) gives this text |
5448 | ||
5449 | `help' searches among bindings exported from loaded modules, while | |
5450 | `apropos' searches among bindings visible from the "current" module. | |
5451 | ||
5452 | Examples: (help help) | |
5453 | (help cons) | |
5454 | (help "output-string") | |
aa4bb95d | 5455 | |
e8855f8d MD |
5456 | ** `help' and `apropos' now prints full module names |
5457 | ||
0af43c4a | 5458 | ** Dynamic linking now uses libltdl from the libtool package. |
bd9e24b3 | 5459 | |
0af43c4a MD |
5460 | The old system dependent code for doing dynamic linking has been |
5461 | replaced with calls to the libltdl functions which do all the hairy | |
5462 | details for us. | |
bd9e24b3 | 5463 | |
0af43c4a MD |
5464 | The major improvement is that you can now directly pass libtool |
5465 | library names like "libfoo.la" to `dynamic-link' and `dynamic-link' | |
5466 | will be able to do the best shared library job you can get, via | |
5467 | libltdl. | |
bd9e24b3 | 5468 | |
0af43c4a MD |
5469 | The way dynamic libraries are found has changed and is not really |
5470 | portable across platforms, probably. It is therefore recommended to | |
5471 | use absolute filenames when possible. | |
5472 | ||
5473 | If you pass a filename without an extension to `dynamic-link', it will | |
5474 | try a few appropriate ones. Thus, the most platform ignorant way is | |
5475 | to specify a name like "libfoo", without any directories and | |
5476 | extensions. | |
0573ddae | 5477 | |
91163914 MD |
5478 | ** Guile COOP threads are now compatible with LinuxThreads |
5479 | ||
5480 | Previously, COOP threading wasn't possible in applications linked with | |
5481 | Linux POSIX threads due to their use of the stack pointer to find the | |
5482 | thread context. This has now been fixed with a workaround which uses | |
5483 | the pthreads to allocate the stack. | |
5484 | ||
6c0201ad | 5485 | ** New primitives: `pkgdata-dir', `site-dir', `library-dir' |
62b82274 | 5486 | |
9770d235 MD |
5487 | ** Positions of erring expression in scripts |
5488 | ||
5489 | With version 1.3.4, the location of the erring expression in Guile | |
5490 | scipts is no longer automatically reported. (This should have been | |
5491 | documented before the 1.3.4 release.) | |
5492 | ||
5493 | You can get this information by enabling recording of positions of | |
5494 | source expressions and running the debugging evaluator. Put this at | |
5495 | the top of your script (or in your "site" file): | |
5496 | ||
5497 | (read-enable 'positions) | |
5498 | (debug-enable 'debug) | |
5499 | ||
0573ddae MD |
5500 | ** Backtraces in scripts |
5501 | ||
5502 | It is now possible to get backtraces in scripts. | |
5503 | ||
5504 | Put | |
5505 | ||
5506 | (debug-enable 'debug 'backtrace) | |
5507 | ||
5508 | at the top of the script. | |
5509 | ||
5510 | (The first options enables the debugging evaluator. | |
5511 | The second enables backtraces.) | |
5512 | ||
e8855f8d MD |
5513 | ** Part of module system symbol lookup now implemented in C |
5514 | ||
5515 | The eval closure of most modules is now implemented in C. Since this | |
5516 | was one of the bottlenecks for loading speed, Guile now loads code | |
5517 | substantially faster than before. | |
5518 | ||
f25f761d GH |
5519 | ** Attempting to get the value of an unbound variable now produces |
5520 | an exception with a key of 'unbound-variable instead of 'misc-error. | |
5521 | ||
1a35eadc GH |
5522 | ** The initial default output port is now unbuffered if it's using a |
5523 | tty device. Previously in this situation it was line-buffered. | |
5524 | ||
820920e6 MD |
5525 | ** New hook: after-gc-hook |
5526 | ||
5527 | after-gc-hook takes over the role of gc-thunk. This hook is run at | |
5528 | the first SCM_TICK after a GC. (Thus, the code is run at the same | |
5529 | point during evaluation as signal handlers.) | |
5530 | ||
5531 | Note that this hook should be used only for diagnostic and debugging | |
5532 | purposes. It is not certain that it will continue to be well-defined | |
5533 | when this hook is run in the future. | |
5534 | ||
5535 | C programmers: Note the new C level hooks scm_before_gc_c_hook, | |
5536 | scm_before_sweep_c_hook, scm_after_gc_c_hook. | |
5537 | ||
b5074b23 MD |
5538 | ** Improvements to garbage collector |
5539 | ||
5540 | Guile 1.4 has a new policy for triggering heap allocation and | |
5541 | determining the sizes of heap segments. It fixes a number of problems | |
5542 | in the old GC. | |
5543 | ||
5544 | 1. The new policy can handle two separate pools of cells | |
5545 | (2-word/4-word) better. (The old policy would run wild, allocating | |
5546 | more and more memory for certain programs.) | |
5547 | ||
5548 | 2. The old code would sometimes allocate far too much heap so that the | |
5549 | Guile process became gigantic. The new code avoids this. | |
5550 | ||
5551 | 3. The old code would sometimes allocate too little so that few cells | |
5552 | were freed at GC so that, in turn, too much time was spent in GC. | |
5553 | ||
5554 | 4. The old code would often trigger heap allocation several times in a | |
5555 | row. (The new scheme predicts how large the segments needs to be | |
5556 | in order not to need further allocation.) | |
5557 | ||
e8855f8d MD |
5558 | All in all, the new GC policy will make larger applications more |
5559 | efficient. | |
5560 | ||
b5074b23 MD |
5561 | The new GC scheme also is prepared for POSIX threading. Threads can |
5562 | allocate private pools of cells ("clusters") with just a single | |
5563 | function call. Allocation of single cells from such a cluster can | |
5564 | then proceed without any need of inter-thread synchronization. | |
5565 | ||
5566 | ** New environment variables controlling GC parameters | |
5567 | ||
5568 | GUILE_MAX_SEGMENT_SIZE Maximal segment size | |
5569 | (default = 2097000) | |
5570 | ||
5571 | Allocation of 2-word cell heaps: | |
5572 | ||
5573 | GUILE_INIT_SEGMENT_SIZE_1 Size of initial heap segment in bytes | |
5574 | (default = 360000) | |
5575 | ||
5576 | GUILE_MIN_YIELD_1 Minimum number of freed cells at each | |
5577 | GC in percent of total heap size | |
5578 | (default = 40) | |
5579 | ||
5580 | Allocation of 4-word cell heaps | |
5581 | (used for real numbers and misc other objects): | |
5582 | ||
5583 | GUILE_INIT_SEGMENT_SIZE_2, GUILE_MIN_YIELD_2 | |
5584 | ||
5585 | (See entry "Way for application to customize GC parameters" under | |
5586 | section "Changes to the scm_ interface" below.) | |
5587 | ||
67ef2dca MD |
5588 | ** Guile now implements reals using 4-word cells |
5589 | ||
5590 | This speeds up computation with reals. (They were earlier allocated | |
5591 | with `malloc'.) There is still some room for optimizations, however. | |
5592 | ||
5593 | ** Some further steps toward POSIX thread support have been taken | |
5594 | ||
5595 | *** Guile's critical sections (SCM_DEFER/ALLOW_INTS) | |
5596 | don't have much effect any longer, and many of them will be removed in | |
5597 | next release. | |
5598 | ||
5599 | *** Signals | |
5600 | are only handled at the top of the evaluator loop, immediately after | |
5601 | I/O, and in scm_equalp. | |
5602 | ||
5603 | *** The GC can allocate thread private pools of pairs. | |
5604 | ||
0af43c4a MD |
5605 | * Changes to Scheme functions and syntax |
5606 | ||
a0128ebe | 5607 | ** close-input-port and close-output-port are now R5RS |
7c1e0b12 | 5608 | |
a0128ebe | 5609 | These procedures have been turned into primitives and have R5RS behaviour. |
7c1e0b12 | 5610 | |
0af43c4a MD |
5611 | ** New procedure: simple-format PORT MESSAGE ARG1 ... |
5612 | ||
5613 | (ice-9 boot) makes `format' an alias for `simple-format' until possibly | |
5614 | extended by the more sophisticated version in (ice-9 format) | |
5615 | ||
5616 | (simple-format port message . args) | |
5617 | Write MESSAGE to DESTINATION, defaulting to `current-output-port'. | |
5618 | MESSAGE can contain ~A (was %s) and ~S (was %S) escapes. When printed, | |
5619 | the escapes are replaced with corresponding members of ARGS: | |
5620 | ~A formats using `display' and ~S formats using `write'. | |
5621 | If DESTINATION is #t, then use the `current-output-port', | |
5622 | if DESTINATION is #f, then return a string containing the formatted text. | |
5623 | Does not add a trailing newline." | |
5624 | ||
5625 | ** string-ref: the second argument is no longer optional. | |
5626 | ||
5627 | ** string, list->string: no longer accept strings in their arguments, | |
5628 | only characters, for compatibility with R5RS. | |
5629 | ||
5630 | ** New procedure: port-closed? PORT | |
5631 | Returns #t if PORT is closed or #f if it is open. | |
5632 | ||
0a9e521f MD |
5633 | ** Deprecated: list* |
5634 | ||
5635 | The list* functionality is now provided by cons* (SRFI-1 compliant) | |
5636 | ||
b5074b23 MD |
5637 | ** New procedure: cons* ARG1 ARG2 ... ARGn |
5638 | ||
5639 | Like `list', but the last arg provides the tail of the constructed list, | |
5640 | returning (cons ARG1 (cons ARG2 (cons ... ARGn))). | |
5641 | ||
5642 | Requires at least one argument. If given one argument, that argument | |
5643 | is returned as result. | |
5644 | ||
5645 | This function is called `list*' in some other Schemes and in Common LISP. | |
5646 | ||
341f78c9 MD |
5647 | ** Removed deprecated: serial-map, serial-array-copy!, serial-array-map! |
5648 | ||
e8855f8d MD |
5649 | ** New procedure: object-documentation OBJECT |
5650 | ||
5651 | Returns the documentation string associated with OBJECT. The | |
5652 | procedure uses a caching mechanism so that subsequent lookups are | |
5653 | faster. | |
5654 | ||
5655 | Exported by (ice-9 documentation). | |
5656 | ||
5657 | ** module-name now returns full names of modules | |
5658 | ||
5659 | Previously, only the last part of the name was returned (`session' for | |
5660 | `(ice-9 session)'). Ex: `(ice-9 session)'. | |
5661 | ||
894a712b DH |
5662 | * Changes to the gh_ interface |
5663 | ||
5664 | ** Deprecated: gh_int2scmb | |
5665 | ||
5666 | Use gh_bool2scm instead. | |
5667 | ||
a2349a28 GH |
5668 | * Changes to the scm_ interface |
5669 | ||
810e1aec MD |
5670 | ** Guile primitives now carry docstrings! |
5671 | ||
5672 | Thanks to Greg Badros! | |
5673 | ||
0a9e521f | 5674 | ** Guile primitives are defined in a new way: SCM_DEFINE/SCM_DEFINE1/SCM_PROC |
0af43c4a | 5675 | |
0a9e521f MD |
5676 | Now Guile primitives are defined using the SCM_DEFINE/SCM_DEFINE1/SCM_PROC |
5677 | macros and must contain a docstring that is extracted into foo.doc using a new | |
0af43c4a MD |
5678 | guile-doc-snarf script (that uses guile-doc-snarf.awk). |
5679 | ||
0a9e521f MD |
5680 | However, a major overhaul of these macros is scheduled for the next release of |
5681 | guile. | |
5682 | ||
0af43c4a MD |
5683 | ** Guile primitives use a new technique for validation of arguments |
5684 | ||
5685 | SCM_VALIDATE_* macros are defined to ease the redundancy and improve | |
5686 | the readability of argument checking. | |
5687 | ||
5688 | ** All (nearly?) K&R prototypes for functions replaced with ANSI C equivalents. | |
5689 | ||
894a712b | 5690 | ** New macros: SCM_PACK, SCM_UNPACK |
f8a72ca4 MD |
5691 | |
5692 | Compose/decompose an SCM value. | |
5693 | ||
894a712b DH |
5694 | The SCM type is now treated as an abstract data type and may be defined as a |
5695 | long, a void* or as a struct, depending on the architecture and compile time | |
5696 | options. This makes it easier to find several types of bugs, for example when | |
5697 | SCM values are treated as integers without conversion. Values of the SCM type | |
5698 | should be treated as "atomic" values. These macros are used when | |
f8a72ca4 MD |
5699 | composing/decomposing an SCM value, either because you want to access |
5700 | individual bits, or because you want to treat it as an integer value. | |
5701 | ||
5702 | E.g., in order to set bit 7 in an SCM value x, use the expression | |
5703 | ||
5704 | SCM_PACK (SCM_UNPACK (x) | 0x80) | |
5705 | ||
e11f8b42 DH |
5706 | ** The name property of hooks is deprecated. |
5707 | Thus, the use of SCM_HOOK_NAME and scm_make_hook_with_name is deprecated. | |
5708 | ||
5709 | You can emulate this feature by using object properties. | |
5710 | ||
6c0201ad | 5711 | ** Deprecated macros: SCM_INPORTP, SCM_OUTPORTP, SCM_CRDY, SCM_ICHRP, |
894a712b DH |
5712 | SCM_ICHR, SCM_MAKICHR, SCM_SETJMPBUF, SCM_NSTRINGP, SCM_NRWSTRINGP, |
5713 | SCM_NVECTORP | |
f8a72ca4 | 5714 | |
894a712b | 5715 | These macros will be removed in a future release of Guile. |
7c1e0b12 | 5716 | |
6c0201ad | 5717 | ** The following types, functions and macros from numbers.h are deprecated: |
0a9e521f MD |
5718 | scm_dblproc, SCM_UNEGFIXABLE, SCM_FLOBUFLEN, SCM_INEXP, SCM_CPLXP, SCM_REAL, |
5719 | SCM_IMAG, SCM_REALPART, scm_makdbl, SCM_SINGP, SCM_NUM2DBL, SCM_NO_BIGDIG | |
5720 | ||
a2349a28 GH |
5721 | ** Port internals: the rw_random variable in the scm_port structure |
5722 | must be set to non-zero in any random access port. In recent Guile | |
5723 | releases it was only set for bidirectional random-access ports. | |
5724 | ||
7dcb364d GH |
5725 | ** Port internals: the seek ptob procedure is now responsible for |
5726 | resetting the buffers if required. The change was made so that in the | |
5727 | special case of reading the current position (i.e., seek p 0 SEEK_CUR) | |
5728 | the fport and strport ptobs can avoid resetting the buffers, | |
5729 | in particular to avoid discarding unread chars. An existing port | |
5730 | type can be fixed by adding something like the following to the | |
5731 | beginning of the ptob seek procedure: | |
5732 | ||
5733 | if (pt->rw_active == SCM_PORT_READ) | |
5734 | scm_end_input (object); | |
5735 | else if (pt->rw_active == SCM_PORT_WRITE) | |
5736 | ptob->flush (object); | |
5737 | ||
5738 | although to actually avoid resetting the buffers and discard unread | |
5739 | chars requires further hacking that depends on the characteristics | |
5740 | of the ptob. | |
5741 | ||
894a712b DH |
5742 | ** Deprecated functions: scm_fseek, scm_tag |
5743 | ||
5744 | These functions are no longer used and will be removed in a future version. | |
5745 | ||
f25f761d GH |
5746 | ** The scm_sysmissing procedure is no longer used in libguile. |
5747 | Unless it turns out to be unexpectedly useful to somebody, it will be | |
5748 | removed in a future version. | |
5749 | ||
0af43c4a MD |
5750 | ** The format of error message strings has changed |
5751 | ||
5752 | The two C procedures: scm_display_error and scm_error, as well as the | |
5753 | primitive `scm-error', now use scm_simple_format to do their work. | |
5754 | This means that the message strings of all code must be updated to use | |
5755 | ~A where %s was used before, and ~S where %S was used before. | |
5756 | ||
5757 | During the period when there still are a lot of old Guiles out there, | |
5758 | you might want to support both old and new versions of Guile. | |
5759 | ||
5760 | There are basically two methods to achieve this. Both methods use | |
5761 | autoconf. Put | |
5762 | ||
5763 | AC_CHECK_FUNCS(scm_simple_format) | |
5764 | ||
5765 | in your configure.in. | |
5766 | ||
5767 | Method 1: Use the string concatenation features of ANSI C's | |
5768 | preprocessor. | |
5769 | ||
5770 | In C: | |
5771 | ||
5772 | #ifdef HAVE_SCM_SIMPLE_FORMAT | |
5773 | #define FMT_S "~S" | |
5774 | #else | |
5775 | #define FMT_S "%S" | |
5776 | #endif | |
5777 | ||
5778 | Then represent each of your error messages using a preprocessor macro: | |
5779 | ||
5780 | #define E_SPIDER_ERROR "There's a spider in your " ## FMT_S ## "!!!" | |
5781 | ||
5782 | In Scheme: | |
5783 | ||
5784 | (define fmt-s (if (defined? 'simple-format) "~S" "%S")) | |
5785 | (define make-message string-append) | |
5786 | ||
5787 | (define e-spider-error (make-message "There's a spider in your " fmt-s "!!!")) | |
5788 | ||
5789 | Method 2: Use the oldfmt function found in doc/oldfmt.c. | |
5790 | ||
5791 | In C: | |
5792 | ||
5793 | scm_misc_error ("picnic", scm_c_oldfmt0 ("There's a spider in your ~S!!!"), | |
5794 | ...); | |
5795 | ||
5796 | In Scheme: | |
5797 | ||
5798 | (scm-error 'misc-error "picnic" (oldfmt "There's a spider in your ~S!!!") | |
5799 | ...) | |
5800 | ||
5801 | ||
f3b5e185 MD |
5802 | ** Deprecated: coop_mutex_init, coop_condition_variable_init |
5803 | ||
5804 | Don't use the functions coop_mutex_init and | |
5805 | coop_condition_variable_init. They will change. | |
5806 | ||
5807 | Use scm_mutex_init and scm_cond_init instead. | |
5808 | ||
f3b5e185 MD |
5809 | ** New function: int scm_cond_timedwait (scm_cond_t *COND, scm_mutex_t *MUTEX, const struct timespec *ABSTIME) |
5810 | `scm_cond_timedwait' atomically unlocks MUTEX and waits on | |
5811 | COND, as `scm_cond_wait' does, but it also bounds the duration | |
5812 | of the wait. If COND has not been signaled before time ABSTIME, | |
5813 | the mutex MUTEX is re-acquired and `scm_cond_timedwait' | |
5814 | returns the error code `ETIMEDOUT'. | |
5815 | ||
5816 | The ABSTIME parameter specifies an absolute time, with the same | |
5817 | origin as `time' and `gettimeofday': an ABSTIME of 0 corresponds | |
5818 | to 00:00:00 GMT, January 1, 1970. | |
5819 | ||
5820 | ** New function: scm_cond_broadcast (scm_cond_t *COND) | |
5821 | `scm_cond_broadcast' restarts all the threads that are waiting | |
5822 | on the condition variable COND. Nothing happens if no threads are | |
5823 | waiting on COND. | |
5824 | ||
5825 | ** New function: scm_key_create (scm_key_t *KEY, void (*destr_function) (void *)) | |
5826 | `scm_key_create' allocates a new TSD key. The key is stored in | |
5827 | the location pointed to by KEY. There is no limit on the number | |
5828 | of keys allocated at a given time. The value initially associated | |
5829 | with the returned key is `NULL' in all currently executing threads. | |
5830 | ||
5831 | The DESTR_FUNCTION argument, if not `NULL', specifies a destructor | |
5832 | function associated with the key. When a thread terminates, | |
5833 | DESTR_FUNCTION is called on the value associated with the key in | |
5834 | that thread. The DESTR_FUNCTION is not called if a key is deleted | |
5835 | with `scm_key_delete' or a value is changed with | |
5836 | `scm_setspecific'. The order in which destructor functions are | |
5837 | called at thread termination time is unspecified. | |
5838 | ||
5839 | Destructors are not yet implemented. | |
5840 | ||
5841 | ** New function: scm_setspecific (scm_key_t KEY, const void *POINTER) | |
5842 | `scm_setspecific' changes the value associated with KEY in the | |
5843 | calling thread, storing the given POINTER instead. | |
5844 | ||
5845 | ** New function: scm_getspecific (scm_key_t KEY) | |
5846 | `scm_getspecific' returns the value currently associated with | |
5847 | KEY in the calling thread. | |
5848 | ||
5849 | ** New function: scm_key_delete (scm_key_t KEY) | |
5850 | `scm_key_delete' deallocates a TSD key. It does not check | |
5851 | whether non-`NULL' values are associated with that key in the | |
5852 | currently executing threads, nor call the destructor function | |
5853 | associated with the key. | |
5854 | ||
820920e6 MD |
5855 | ** New function: scm_c_hook_init (scm_c_hook_t *HOOK, void *HOOK_DATA, scm_c_hook_type_t TYPE) |
5856 | ||
5857 | Initialize a C level hook HOOK with associated HOOK_DATA and type | |
5858 | TYPE. (See scm_c_hook_run ().) | |
5859 | ||
5860 | ** New function: scm_c_hook_add (scm_c_hook_t *HOOK, scm_c_hook_function_t FUNC, void *FUNC_DATA, int APPENDP) | |
5861 | ||
5862 | Add hook function FUNC with associated FUNC_DATA to HOOK. If APPENDP | |
5863 | is true, add it last, otherwise first. The same FUNC can be added | |
5864 | multiple times if FUNC_DATA differ and vice versa. | |
5865 | ||
5866 | ** New function: scm_c_hook_remove (scm_c_hook_t *HOOK, scm_c_hook_function_t FUNC, void *FUNC_DATA) | |
5867 | ||
5868 | Remove hook function FUNC with associated FUNC_DATA from HOOK. A | |
5869 | function is only removed if both FUNC and FUNC_DATA matches. | |
5870 | ||
5871 | ** New function: void *scm_c_hook_run (scm_c_hook_t *HOOK, void *DATA) | |
5872 | ||
5873 | Run hook HOOK passing DATA to the hook functions. | |
5874 | ||
5875 | If TYPE is SCM_C_HOOK_NORMAL, all hook functions are run. The value | |
5876 | returned is undefined. | |
5877 | ||
5878 | If TYPE is SCM_C_HOOK_OR, hook functions are run until a function | |
5879 | returns a non-NULL value. This value is returned as the result of | |
5880 | scm_c_hook_run. If all functions return NULL, NULL is returned. | |
5881 | ||
5882 | If TYPE is SCM_C_HOOK_AND, hook functions are run until a function | |
5883 | returns a NULL value, and NULL is returned. If all functions returns | |
5884 | a non-NULL value, the last value is returned. | |
5885 | ||
5886 | ** New C level GC hooks | |
5887 | ||
5888 | Five new C level hooks has been added to the garbage collector. | |
5889 | ||
5890 | scm_before_gc_c_hook | |
5891 | scm_after_gc_c_hook | |
5892 | ||
5893 | are run before locking and after unlocking the heap. The system is | |
5894 | thus in a mode where evaluation can take place. (Except that | |
5895 | scm_before_gc_c_hook must not allocate new cells.) | |
5896 | ||
5897 | scm_before_mark_c_hook | |
5898 | scm_before_sweep_c_hook | |
5899 | scm_after_sweep_c_hook | |
5900 | ||
5901 | are run when the heap is locked. These are intended for extension of | |
5902 | the GC in a modular fashion. Examples are the weaks and guardians | |
5903 | modules. | |
5904 | ||
b5074b23 MD |
5905 | ** Way for application to customize GC parameters |
5906 | ||
5907 | The application can set up other default values for the GC heap | |
5908 | allocation parameters | |
5909 | ||
5910 | GUILE_INIT_HEAP_SIZE_1, GUILE_MIN_YIELD_1, | |
5911 | GUILE_INIT_HEAP_SIZE_2, GUILE_MIN_YIELD_2, | |
5912 | GUILE_MAX_SEGMENT_SIZE, | |
5913 | ||
5914 | by setting | |
5915 | ||
5916 | scm_default_init_heap_size_1, scm_default_min_yield_1, | |
5917 | scm_default_init_heap_size_2, scm_default_min_yield_2, | |
5918 | scm_default_max_segment_size | |
5919 | ||
5920 | respectively before callong scm_boot_guile. | |
5921 | ||
5922 | (See entry "New environment variables ..." in section | |
5923 | "Changes to the stand-alone interpreter" above.) | |
5924 | ||
9704841c MD |
5925 | ** scm_protect_object/scm_unprotect_object now nest |
5926 | ||
67ef2dca MD |
5927 | This means that you can call scm_protect_object multiple times on an |
5928 | object and count on the object being protected until | |
5929 | scm_unprotect_object has been call the same number of times. | |
5930 | ||
5931 | The functions also have better time complexity. | |
5932 | ||
5933 | Still, it is usually possible to structure the application in a way | |
5934 | that you don't need to use these functions. For example, if you use a | |
5935 | protected standard Guile list to keep track of live objects rather | |
5936 | than some custom data type, objects will die a natural death when they | |
5937 | are no longer needed. | |
5938 | ||
0a9e521f MD |
5939 | ** Deprecated type tags: scm_tc16_flo, scm_tc_flo, scm_tc_dblr, scm_tc_dblc |
5940 | ||
5941 | Guile does not provide the float representation for inexact real numbers any | |
5942 | more. Now, only doubles are used to represent inexact real numbers. Further, | |
5943 | the tag names scm_tc_dblr and scm_tc_dblc have been changed to scm_tc16_real | |
5944 | and scm_tc16_complex, respectively. | |
5945 | ||
341f78c9 MD |
5946 | ** Removed deprecated type scm_smobfuns |
5947 | ||
5948 | ** Removed deprecated function scm_newsmob | |
5949 | ||
b5074b23 MD |
5950 | ** Warning: scm_make_smob_type_mfpe might become deprecated in a future release |
5951 | ||
5952 | There is an ongoing discussion among the developers whether to | |
5953 | deprecate `scm_make_smob_type_mfpe' or not. Please use the current | |
5954 | standard interface (scm_make_smob_type, scm_set_smob_XXX) in new code | |
5955 | until this issue has been settled. | |
5956 | ||
341f78c9 MD |
5957 | ** Removed deprecated type tag scm_tc16_kw |
5958 | ||
2728d7f4 MD |
5959 | ** Added type tag scm_tc16_keyword |
5960 | ||
5961 | (This was introduced already in release 1.3.4 but was not documented | |
5962 | until now.) | |
5963 | ||
67ef2dca MD |
5964 | ** gdb_print now prints "*** Guile not initialized ***" until Guile initialized |
5965 | ||
f25f761d GH |
5966 | * Changes to system call interfaces: |
5967 | ||
28d77376 GH |
5968 | ** The "select" procedure now tests port buffers for the ability to |
5969 | provide input or accept output. Previously only the underlying file | |
5970 | descriptors were checked. | |
5971 | ||
bd9e24b3 GH |
5972 | ** New variable PIPE_BUF: the maximum number of bytes that can be |
5973 | atomically written to a pipe. | |
5974 | ||
f25f761d GH |
5975 | ** If a facility is not available on the system when Guile is |
5976 | compiled, the corresponding primitive procedure will not be defined. | |
5977 | Previously it would have been defined but would throw a system-error | |
5978 | exception if called. Exception handlers which catch this case may | |
5979 | need minor modification: an error will be thrown with key | |
5980 | 'unbound-variable instead of 'system-error. Alternatively it's | |
5981 | now possible to use `defined?' to check whether the facility is | |
5982 | available. | |
5983 | ||
38c1d3c4 | 5984 | ** Procedures which depend on the timezone should now give the correct |
6c0201ad | 5985 | result on systems which cache the TZ environment variable, even if TZ |
38c1d3c4 GH |
5986 | is changed without calling tzset. |
5987 | ||
5c11cc9d GH |
5988 | * Changes to the networking interfaces: |
5989 | ||
5990 | ** New functions: htons, ntohs, htonl, ntohl: for converting short and | |
5991 | long integers between network and host format. For now, it's not | |
5992 | particularly convenient to do this kind of thing, but consider: | |
5993 | ||
5994 | (define write-network-long | |
5995 | (lambda (value port) | |
5996 | (let ((v (make-uniform-vector 1 1 0))) | |
5997 | (uniform-vector-set! v 0 (htonl value)) | |
5998 | (uniform-vector-write v port)))) | |
5999 | ||
6000 | (define read-network-long | |
6001 | (lambda (port) | |
6002 | (let ((v (make-uniform-vector 1 1 0))) | |
6003 | (uniform-vector-read! v port) | |
6004 | (ntohl (uniform-vector-ref v 0))))) | |
6005 | ||
6006 | ** If inet-aton fails, it now throws an error with key 'misc-error | |
6007 | instead of 'system-error, since errno is not relevant. | |
6008 | ||
6009 | ** Certain gethostbyname/gethostbyaddr failures now throw errors with | |
6010 | specific keys instead of 'system-error. The latter is inappropriate | |
6011 | since errno will not have been set. The keys are: | |
afe5177e | 6012 | 'host-not-found, 'try-again, 'no-recovery and 'no-data. |
5c11cc9d GH |
6013 | |
6014 | ** sethostent, setnetent, setprotoent, setservent: now take an | |
6015 | optional argument STAYOPEN, which specifies whether the database | |
6016 | remains open after a database entry is accessed randomly (e.g., using | |
6017 | gethostbyname for the hosts database.) The default is #f. Previously | |
6018 | #t was always used. | |
6019 | ||
cc36e791 | 6020 | \f |
43fa9a05 JB |
6021 | Changes since Guile 1.3.2: |
6022 | ||
0fdcbcaa MD |
6023 | * Changes to the stand-alone interpreter |
6024 | ||
6025 | ** Debugger | |
6026 | ||
6027 | An initial version of the Guile debugger written by Chris Hanson has | |
6028 | been added. The debugger is still under development but is included | |
6029 | in the distribution anyway since it is already quite useful. | |
6030 | ||
6031 | Type | |
6032 | ||
6033 | (debug) | |
6034 | ||
6035 | after an error to enter the debugger. Type `help' inside the debugger | |
6036 | for a description of available commands. | |
6037 | ||
6038 | If you prefer to have stack frames numbered and printed in | |
6039 | anti-chronological order and prefer up in the stack to be down on the | |
6040 | screen as is the case in gdb, you can put | |
6041 | ||
6042 | (debug-enable 'backwards) | |
6043 | ||
6044 | in your .guile startup file. (However, this means that Guile can't | |
6045 | use indentation to indicate stack level.) | |
6046 | ||
6047 | The debugger is autoloaded into Guile at the first use. | |
6048 | ||
6049 | ** Further enhancements to backtraces | |
6050 | ||
6051 | There is a new debug option `width' which controls the maximum width | |
6052 | on the screen of printed stack frames. Fancy printing parameters | |
6053 | ("level" and "length" as in Common LISP) are adaptively adjusted for | |
6054 | each stack frame to give maximum information while still fitting | |
6055 | within the bounds. If the stack frame can't be made to fit by | |
6056 | adjusting parameters, it is simply cut off at the end. This is marked | |
6057 | with a `$'. | |
6058 | ||
6059 | ** Some modules are now only loaded when the repl is started | |
6060 | ||
6061 | The modules (ice-9 debug), (ice-9 session), (ice-9 threads) and (ice-9 | |
6062 | regex) are now loaded into (guile-user) only if the repl has been | |
6063 | started. The effect is that the startup time for scripts has been | |
6064 | reduced to 30% of what it was previously. | |
6065 | ||
6066 | Correctly written scripts load the modules they require at the top of | |
6067 | the file and should not be affected by this change. | |
6068 | ||
ece41168 MD |
6069 | ** Hooks are now represented as smobs |
6070 | ||
6822fe53 MD |
6071 | * Changes to Scheme functions and syntax |
6072 | ||
0ce204b0 MV |
6073 | ** Readline support has changed again. |
6074 | ||
6075 | The old (readline-activator) module is gone. Use (ice-9 readline) | |
6076 | instead, which now contains all readline functionality. So the code | |
6077 | to activate readline is now | |
6078 | ||
6079 | (use-modules (ice-9 readline)) | |
6080 | (activate-readline) | |
6081 | ||
6082 | This should work at any time, including from the guile prompt. | |
6083 | ||
5d195868 JB |
6084 | To avoid confusion about the terms of Guile's license, please only |
6085 | enable readline for your personal use; please don't make it the | |
6086 | default for others. Here is why we make this rather odd-sounding | |
6087 | request: | |
6088 | ||
6089 | Guile is normally licensed under a weakened form of the GNU General | |
6090 | Public License, which allows you to link code with Guile without | |
6091 | placing that code under the GPL. This exception is important to some | |
6092 | people. | |
6093 | ||
6094 | However, since readline is distributed under the GNU General Public | |
6095 | License, when you link Guile with readline, either statically or | |
6096 | dynamically, you effectively change Guile's license to the strict GPL. | |
6097 | Whenever you link any strictly GPL'd code into Guile, uses of Guile | |
6098 | which are normally permitted become forbidden. This is a rather | |
6099 | non-obvious consequence of the licensing terms. | |
6100 | ||
6101 | So, to make sure things remain clear, please let people choose for | |
6102 | themselves whether to link GPL'd libraries like readline with Guile. | |
6103 | ||
25b0654e JB |
6104 | ** regexp-substitute/global has changed slightly, but incompatibly. |
6105 | ||
6106 | If you include a function in the item list, the string of the match | |
6107 | object it receives is the same string passed to | |
6108 | regexp-substitute/global, not some suffix of that string. | |
6109 | Correspondingly, the match's positions are relative to the entire | |
6110 | string, not the suffix. | |
6111 | ||
6112 | If the regexp can match the empty string, the way matches are chosen | |
6113 | from the string has changed. regexp-substitute/global recognizes the | |
6114 | same set of matches that list-matches does; see below. | |
6115 | ||
6116 | ** New function: list-matches REGEXP STRING [FLAGS] | |
6117 | ||
6118 | Return a list of match objects, one for every non-overlapping, maximal | |
6119 | match of REGEXP in STRING. The matches appear in left-to-right order. | |
6120 | list-matches only reports matches of the empty string if there are no | |
6121 | other matches which begin on, end at, or include the empty match's | |
6122 | position. | |
6123 | ||
6124 | If present, FLAGS is passed as the FLAGS argument to regexp-exec. | |
6125 | ||
6126 | ** New function: fold-matches REGEXP STRING INIT PROC [FLAGS] | |
6127 | ||
6128 | For each match of REGEXP in STRING, apply PROC to the match object, | |
6129 | and the last value PROC returned, or INIT for the first call. Return | |
6130 | the last value returned by PROC. We apply PROC to the matches as they | |
6131 | appear from left to right. | |
6132 | ||
6133 | This function recognizes matches according to the same criteria as | |
6134 | list-matches. | |
6135 | ||
6136 | Thus, you could define list-matches like this: | |
6137 | ||
6138 | (define (list-matches regexp string . flags) | |
6139 | (reverse! (apply fold-matches regexp string '() cons flags))) | |
6140 | ||
6141 | If present, FLAGS is passed as the FLAGS argument to regexp-exec. | |
6142 | ||
bc848f7f MD |
6143 | ** Hooks |
6144 | ||
6145 | *** New function: hook? OBJ | |
6146 | ||
6147 | Return #t if OBJ is a hook, otherwise #f. | |
6148 | ||
ece41168 MD |
6149 | *** New function: make-hook-with-name NAME [ARITY] |
6150 | ||
6151 | Return a hook with name NAME and arity ARITY. The default value for | |
6152 | ARITY is 0. The only effect of NAME is that it will appear when the | |
6153 | hook object is printed to ease debugging. | |
6154 | ||
bc848f7f MD |
6155 | *** New function: hook-empty? HOOK |
6156 | ||
6157 | Return #t if HOOK doesn't contain any procedures, otherwise #f. | |
6158 | ||
6159 | *** New function: hook->list HOOK | |
6160 | ||
6161 | Return a list of the procedures that are called when run-hook is | |
6162 | applied to HOOK. | |
6163 | ||
b074884f JB |
6164 | ** `map' signals an error if its argument lists are not all the same length. |
6165 | ||
6166 | This is the behavior required by R5RS, so this change is really a bug | |
6167 | fix. But it seems to affect a lot of people's code, so we're | |
6168 | mentioning it here anyway. | |
6169 | ||
6822fe53 MD |
6170 | ** Print-state handling has been made more transparent |
6171 | ||
6172 | Under certain circumstances, ports are represented as a port with an | |
6173 | associated print state. Earlier, this pair was represented as a pair | |
6174 | (see "Some magic has been added to the printer" below). It is now | |
6175 | indistinguishable (almost; see `get-print-state') from a port on the | |
6176 | user level. | |
6177 | ||
6178 | *** New function: port-with-print-state OUTPUT-PORT PRINT-STATE | |
6179 | ||
6180 | Return a new port with the associated print state PRINT-STATE. | |
6181 | ||
6182 | *** New function: get-print-state OUTPUT-PORT | |
6183 | ||
6184 | Return the print state associated with this port if it exists, | |
6185 | otherwise return #f. | |
6186 | ||
340a8770 | 6187 | *** New function: directory-stream? OBJECT |
77242ff9 | 6188 | |
340a8770 | 6189 | Returns true iff OBJECT is a directory stream --- the sort of object |
77242ff9 GH |
6190 | returned by `opendir'. |
6191 | ||
0fdcbcaa MD |
6192 | ** New function: using-readline? |
6193 | ||
6194 | Return #t if readline is in use in the current repl. | |
6195 | ||
26405bc1 MD |
6196 | ** structs will be removed in 1.4 |
6197 | ||
6198 | Structs will be replaced in Guile 1.4. We will merge GOOPS into Guile | |
6199 | and use GOOPS objects as the fundamental record type. | |
6200 | ||
49199eaa MD |
6201 | * Changes to the scm_ interface |
6202 | ||
26405bc1 MD |
6203 | ** structs will be removed in 1.4 |
6204 | ||
6205 | The entire current struct interface (struct.c, struct.h) will be | |
6206 | replaced in Guile 1.4. We will merge GOOPS into libguile and use | |
6207 | GOOPS objects as the fundamental record type. | |
6208 | ||
49199eaa MD |
6209 | ** The internal representation of subr's has changed |
6210 | ||
6211 | Instead of giving a hint to the subr name, the CAR field of the subr | |
6212 | now contains an index to a subr entry in scm_subr_table. | |
6213 | ||
6214 | *** New variable: scm_subr_table | |
6215 | ||
6216 | An array of subr entries. A subr entry contains the name, properties | |
6217 | and documentation associated with the subr. The properties and | |
6218 | documentation slots are not yet used. | |
6219 | ||
6220 | ** A new scheme for "forwarding" calls to a builtin to a generic function | |
6221 | ||
6222 | It is now possible to extend the functionality of some Guile | |
6223 | primitives by letting them defer a call to a GOOPS generic function on | |
240ed66f | 6224 | argument mismatch. This means that there is no loss of efficiency in |
daf516d6 | 6225 | normal evaluation. |
49199eaa MD |
6226 | |
6227 | Example: | |
6228 | ||
daf516d6 | 6229 | (use-modules (oop goops)) ; Must be GOOPS version 0.2. |
49199eaa MD |
6230 | (define-method + ((x <string>) (y <string>)) |
6231 | (string-append x y)) | |
6232 | ||
86a4d62e MD |
6233 | + will still be as efficient as usual in numerical calculations, but |
6234 | can also be used for concatenating strings. | |
49199eaa | 6235 | |
86a4d62e | 6236 | Who will be the first one to extend Guile's numerical tower to |
daf516d6 MD |
6237 | rationals? :) [OK, there a few other things to fix before this can |
6238 | be made in a clean way.] | |
49199eaa MD |
6239 | |
6240 | *** New snarf macros for defining primitives: SCM_GPROC, SCM_GPROC1 | |
6241 | ||
6242 | New macro: SCM_GPROC (CNAME, SNAME, REQ, OPT, VAR, CFUNC, GENERIC) | |
6243 | ||
6244 | New macro: SCM_GPROC1 (CNAME, SNAME, TYPE, CFUNC, GENERIC) | |
6245 | ||
d02cafe7 | 6246 | These do the same job as SCM_PROC and SCM_PROC1, but they also define |
49199eaa MD |
6247 | a variable GENERIC which can be used by the dispatch macros below. |
6248 | ||
6249 | [This is experimental code which may change soon.] | |
6250 | ||
6251 | *** New macros for forwarding control to a generic on arg type error | |
6252 | ||
6253 | New macro: SCM_WTA_DISPATCH_1 (GENERIC, ARG1, POS, SUBR) | |
6254 | ||
6255 | New macro: SCM_WTA_DISPATCH_2 (GENERIC, ARG1, ARG2, POS, SUBR) | |
6256 | ||
6257 | These correspond to the scm_wta function call, and have the same | |
6258 | behaviour until the user has called the GOOPS primitive | |
6259 | `enable-primitive-generic!'. After that, these macros will apply the | |
6260 | generic function GENERIC to the argument(s) instead of calling | |
6261 | scm_wta. | |
6262 | ||
6263 | [This is experimental code which may change soon.] | |
6264 | ||
6265 | *** New macros for argument testing with generic dispatch | |
6266 | ||
6267 | New macro: SCM_GASSERT1 (COND, GENERIC, ARG1, POS, SUBR) | |
6268 | ||
6269 | New macro: SCM_GASSERT2 (COND, GENERIC, ARG1, ARG2, POS, SUBR) | |
6270 | ||
6271 | These correspond to the SCM_ASSERT macro, but will defer control to | |
6272 | GENERIC on error after `enable-primitive-generic!' has been called. | |
6273 | ||
6274 | [This is experimental code which may change soon.] | |
6275 | ||
6276 | ** New function: SCM scm_eval_body (SCM body, SCM env) | |
6277 | ||
6278 | Evaluates the body of a special form. | |
6279 | ||
6280 | ** The internal representation of struct's has changed | |
6281 | ||
6282 | Previously, four slots were allocated for the procedure(s) of entities | |
6283 | and operators. The motivation for this representation had to do with | |
6284 | the structure of the evaluator, the wish to support tail-recursive | |
6285 | generic functions, and efficiency. Since the generic function | |
6286 | dispatch mechanism has changed, there is no longer a need for such an | |
6287 | expensive representation, and the representation has been simplified. | |
6288 | ||
6289 | This should not make any difference for most users. | |
6290 | ||
6291 | ** GOOPS support has been cleaned up. | |
6292 | ||
6293 | Some code has been moved from eval.c to objects.c and code in both of | |
6294 | these compilation units has been cleaned up and better structured. | |
6295 | ||
6296 | *** New functions for applying generic functions | |
6297 | ||
6298 | New function: SCM scm_apply_generic (GENERIC, ARGS) | |
6299 | New function: SCM scm_call_generic_0 (GENERIC) | |
6300 | New function: SCM scm_call_generic_1 (GENERIC, ARG1) | |
6301 | New function: SCM scm_call_generic_2 (GENERIC, ARG1, ARG2) | |
6302 | New function: SCM scm_call_generic_3 (GENERIC, ARG1, ARG2, ARG3) | |
6303 | ||
ece41168 MD |
6304 | ** Deprecated function: scm_make_named_hook |
6305 | ||
6306 | It is now replaced by: | |
6307 | ||
6308 | ** New function: SCM scm_create_hook (const char *name, int arity) | |
6309 | ||
6310 | Creates a hook in the same way as make-hook above but also | |
6311 | binds a variable named NAME to it. | |
6312 | ||
6313 | This is the typical way of creating a hook from C code. | |
6314 | ||
6315 | Currently, the variable is created in the "current" module. | |
6316 | This might change when we get the new module system. | |
6317 | ||
6318 | [The behaviour is identical to scm_make_named_hook.] | |
6319 | ||
6320 | ||
43fa9a05 | 6321 | \f |
f3227c7a JB |
6322 | Changes since Guile 1.3: |
6323 | ||
6ca345f3 JB |
6324 | * Changes to mailing lists |
6325 | ||
6326 | ** Some of the Guile mailing lists have moved to sourceware.cygnus.com. | |
6327 | ||
6328 | See the README file to find current addresses for all the Guile | |
6329 | mailing lists. | |
6330 | ||
d77fb593 JB |
6331 | * Changes to the distribution |
6332 | ||
1d335863 JB |
6333 | ** Readline support is no longer included with Guile by default. |
6334 | ||
6335 | Based on the different license terms of Guile and Readline, we | |
6336 | concluded that Guile should not *by default* cause the linking of | |
6337 | Readline into an application program. Readline support is now offered | |
6338 | as a separate module, which is linked into an application only when | |
6339 | you explicitly specify it. | |
6340 | ||
6341 | Although Guile is GNU software, its distribution terms add a special | |
6342 | exception to the usual GNU General Public License (GPL). Guile's | |
6343 | license includes a clause that allows you to link Guile with non-free | |
6344 | programs. We add this exception so as not to put Guile at a | |
6345 | disadvantage vis-a-vis other extensibility packages that support other | |
6346 | languages. | |
6347 | ||
6348 | In contrast, the GNU Readline library is distributed under the GNU | |
6349 | General Public License pure and simple. This means that you may not | |
6350 | link Readline, even dynamically, into an application unless it is | |
6351 | distributed under a free software license that is compatible the GPL. | |
6352 | ||
6353 | Because of this difference in distribution terms, an application that | |
6354 | can use Guile may not be able to use Readline. Now users will be | |
6355 | explicitly offered two independent decisions about the use of these | |
6356 | two packages. | |
d77fb593 | 6357 | |
0e8a8468 MV |
6358 | You can activate the readline support by issuing |
6359 | ||
6360 | (use-modules (readline-activator)) | |
6361 | (activate-readline) | |
6362 | ||
6363 | from your ".guile" file, for example. | |
6364 | ||
e4eae9b1 MD |
6365 | * Changes to the stand-alone interpreter |
6366 | ||
67ad463a MD |
6367 | ** All builtins now print as primitives. |
6368 | Previously builtin procedures not belonging to the fundamental subr | |
6369 | types printed as #<compiled closure #<primitive-procedure gsubr-apply>>. | |
6370 | Now, they print as #<primitive-procedure NAME>. | |
6371 | ||
6372 | ** Backtraces slightly more intelligible. | |
6373 | gsubr-apply and macro transformer application frames no longer appear | |
6374 | in backtraces. | |
6375 | ||
69c6acbb JB |
6376 | * Changes to Scheme functions and syntax |
6377 | ||
2a52b429 MD |
6378 | ** Guile now correctly handles internal defines by rewriting them into |
6379 | their equivalent letrec. Previously, internal defines would | |
6380 | incrementally add to the innermost environment, without checking | |
6381 | whether the restrictions specified in RnRS were met. This lead to the | |
6382 | correct behaviour when these restriction actually were met, but didn't | |
6383 | catch all illegal uses. Such an illegal use could lead to crashes of | |
b3da54d1 | 6384 | the Guile interpreter or other unwanted results. An example of |
2a52b429 MD |
6385 | incorrect internal defines that made Guile behave erratically: |
6386 | ||
6387 | (let () | |
6388 | (define a 1) | |
6389 | (define (b) a) | |
6390 | (define c (1+ (b))) | |
6391 | (define d 3) | |
6392 | ||
6393 | (b)) | |
6394 | ||
6395 | => 2 | |
6396 | ||
6397 | The problem with this example is that the definition of `c' uses the | |
6398 | value of `b' directly. This confuses the meoization machine of Guile | |
6399 | so that the second call of `b' (this time in a larger environment that | |
6400 | also contains bindings for `c' and `d') refers to the binding of `c' | |
6401 | instead of `a'. You could also make Guile crash with a variation on | |
6402 | this theme: | |
6403 | ||
6404 | (define (foo flag) | |
6405 | (define a 1) | |
6406 | (define (b flag) (if flag a 1)) | |
6407 | (define c (1+ (b flag))) | |
6408 | (define d 3) | |
6409 | ||
6410 | (b #t)) | |
6411 | ||
6412 | (foo #f) | |
6413 | (foo #t) | |
6414 | ||
6415 | From now on, Guile will issue an `Unbound variable: b' error message | |
6416 | for both examples. | |
6417 | ||
36d3d540 MD |
6418 | ** Hooks |
6419 | ||
6420 | A hook contains a list of functions which should be called on | |
6421 | particular occasions in an existing program. Hooks are used for | |
6422 | customization. | |
6423 | ||
6424 | A window manager might have a hook before-window-map-hook. The window | |
6425 | manager uses the function run-hooks to call all functions stored in | |
6426 | before-window-map-hook each time a window is mapped. The user can | |
6427 | store functions in the hook using add-hook!. | |
6428 | ||
6429 | In Guile, hooks are first class objects. | |
6430 | ||
6431 | *** New function: make-hook [N_ARGS] | |
6432 | ||
6433 | Return a hook for hook functions which can take N_ARGS arguments. | |
6434 | The default value for N_ARGS is 0. | |
6435 | ||
ad91d6c3 MD |
6436 | (See also scm_make_named_hook below.) |
6437 | ||
36d3d540 MD |
6438 | *** New function: add-hook! HOOK PROC [APPEND_P] |
6439 | ||
6440 | Put PROC at the beginning of the list of functions stored in HOOK. | |
6441 | If APPEND_P is supplied, and non-false, put PROC at the end instead. | |
6442 | ||
6443 | PROC must be able to take the number of arguments specified when the | |
6444 | hook was created. | |
6445 | ||
6446 | If PROC already exists in HOOK, then remove it first. | |
6447 | ||
6448 | *** New function: remove-hook! HOOK PROC | |
6449 | ||
6450 | Remove PROC from the list of functions in HOOK. | |
6451 | ||
6452 | *** New function: reset-hook! HOOK | |
6453 | ||
6454 | Clear the list of hook functions stored in HOOK. | |
6455 | ||
6456 | *** New function: run-hook HOOK ARG1 ... | |
6457 | ||
6458 | Run all hook functions stored in HOOK with arguments ARG1 ... . | |
6459 | The number of arguments supplied must correspond to the number given | |
6460 | when the hook was created. | |
6461 | ||
56a19408 MV |
6462 | ** The function `dynamic-link' now takes optional keyword arguments. |
6463 | The only keyword argument that is currently defined is `:global | |
6464 | BOOL'. With it, you can control whether the shared library will be | |
6465 | linked in global mode or not. In global mode, the symbols from the | |
6466 | linked library can be used to resolve references from other | |
6467 | dynamically linked libraries. In non-global mode, the linked | |
6468 | library is essentially invisible and can only be accessed via | |
6469 | `dynamic-func', etc. The default is now to link in global mode. | |
6470 | Previously, the default has been non-global mode. | |
6471 | ||
6472 | The `#:global' keyword is only effective on platforms that support | |
6473 | the dlopen family of functions. | |
6474 | ||
ad226f25 | 6475 | ** New function `provided?' |
b7e13f65 JB |
6476 | |
6477 | - Function: provided? FEATURE | |
6478 | Return true iff FEATURE is supported by this installation of | |
6479 | Guile. FEATURE must be a symbol naming a feature; the global | |
6480 | variable `*features*' is a list of available features. | |
6481 | ||
ad226f25 JB |
6482 | ** Changes to the module (ice-9 expect): |
6483 | ||
6484 | *** The expect-strings macro now matches `$' in a regular expression | |
6485 | only at a line-break or end-of-file by default. Previously it would | |
ab711359 JB |
6486 | match the end of the string accumulated so far. The old behaviour |
6487 | can be obtained by setting the variable `expect-strings-exec-flags' | |
6488 | to 0. | |
ad226f25 JB |
6489 | |
6490 | *** The expect-strings macro now uses a variable `expect-strings-exec-flags' | |
6491 | for the regexp-exec flags. If `regexp/noteol' is included, then `$' | |
6492 | in a regular expression will still match before a line-break or | |
6493 | end-of-file. The default is `regexp/noteol'. | |
6494 | ||
6c0201ad | 6495 | *** The expect-strings macro now uses a variable |
ad226f25 JB |
6496 | `expect-strings-compile-flags' for the flags to be supplied to |
6497 | `make-regexp'. The default is `regexp/newline', which was previously | |
6498 | hard-coded. | |
6499 | ||
6500 | *** The expect macro now supplies two arguments to a match procedure: | |
ab711359 JB |
6501 | the current accumulated string and a flag to indicate whether |
6502 | end-of-file has been reached. Previously only the string was supplied. | |
6503 | If end-of-file is reached, the match procedure will be called an | |
6504 | additional time with the same accumulated string as the previous call | |
6505 | but with the flag set. | |
ad226f25 | 6506 | |
b7e13f65 JB |
6507 | ** New module (ice-9 format), implementing the Common Lisp `format' function. |
6508 | ||
6509 | This code, and the documentation for it that appears here, was | |
6510 | borrowed from SLIB, with minor adaptations for Guile. | |
6511 | ||
6512 | - Function: format DESTINATION FORMAT-STRING . ARGUMENTS | |
6513 | An almost complete implementation of Common LISP format description | |
6514 | according to the CL reference book `Common LISP' from Guy L. | |
6515 | Steele, Digital Press. Backward compatible to most of the | |
6516 | available Scheme format implementations. | |
6517 | ||
6518 | Returns `#t', `#f' or a string; has side effect of printing | |
6519 | according to FORMAT-STRING. If DESTINATION is `#t', the output is | |
6520 | to the current output port and `#t' is returned. If DESTINATION | |
6521 | is `#f', a formatted string is returned as the result of the call. | |
6522 | NEW: If DESTINATION is a string, DESTINATION is regarded as the | |
6523 | format string; FORMAT-STRING is then the first argument and the | |
6524 | output is returned as a string. If DESTINATION is a number, the | |
6525 | output is to the current error port if available by the | |
6526 | implementation. Otherwise DESTINATION must be an output port and | |
6527 | `#t' is returned. | |
6528 | ||
6529 | FORMAT-STRING must be a string. In case of a formatting error | |
6530 | format returns `#f' and prints a message on the current output or | |
6531 | error port. Characters are output as if the string were output by | |
6532 | the `display' function with the exception of those prefixed by a | |
6533 | tilde (~). For a detailed description of the FORMAT-STRING syntax | |
6534 | please consult a Common LISP format reference manual. For a test | |
6535 | suite to verify this format implementation load `formatst.scm'. | |
6536 | Please send bug reports to `lutzeb@cs.tu-berlin.de'. | |
6537 | ||
6538 | Note: `format' is not reentrant, i.e. only one `format'-call may | |
6539 | be executed at a time. | |
6540 | ||
6541 | ||
6542 | *** Format Specification (Format version 3.0) | |
6543 | ||
6544 | Please consult a Common LISP format reference manual for a detailed | |
6545 | description of the format string syntax. For a demonstration of the | |
6546 | implemented directives see `formatst.scm'. | |
6547 | ||
6548 | This implementation supports directive parameters and modifiers (`:' | |
6549 | and `@' characters). Multiple parameters must be separated by a comma | |
6550 | (`,'). Parameters can be numerical parameters (positive or negative), | |
6551 | character parameters (prefixed by a quote character (`''), variable | |
6552 | parameters (`v'), number of rest arguments parameter (`#'), empty and | |
6553 | default parameters. Directive characters are case independent. The | |
6554 | general form of a directive is: | |
6555 | ||
6556 | DIRECTIVE ::= ~{DIRECTIVE-PARAMETER,}[:][@]DIRECTIVE-CHARACTER | |
6557 | ||
6558 | DIRECTIVE-PARAMETER ::= [ [-|+]{0-9}+ | 'CHARACTER | v | # ] | |
6559 | ||
6560 | *** Implemented CL Format Control Directives | |
6561 | ||
6562 | Documentation syntax: Uppercase characters represent the | |
6563 | corresponding control directive characters. Lowercase characters | |
6564 | represent control directive parameter descriptions. | |
6565 | ||
6566 | `~A' | |
6567 | Any (print as `display' does). | |
6568 | `~@A' | |
6569 | left pad. | |
6570 | ||
6571 | `~MINCOL,COLINC,MINPAD,PADCHARA' | |
6572 | full padding. | |
6573 | ||
6574 | `~S' | |
6575 | S-expression (print as `write' does). | |
6576 | `~@S' | |
6577 | left pad. | |
6578 | ||
6579 | `~MINCOL,COLINC,MINPAD,PADCHARS' | |
6580 | full padding. | |
6581 | ||
6582 | `~D' | |
6583 | Decimal. | |
6584 | `~@D' | |
6585 | print number sign always. | |
6586 | ||
6587 | `~:D' | |
6588 | print comma separated. | |
6589 | ||
6590 | `~MINCOL,PADCHAR,COMMACHARD' | |
6591 | padding. | |
6592 | ||
6593 | `~X' | |
6594 | Hexadecimal. | |
6595 | `~@X' | |
6596 | print number sign always. | |
6597 | ||
6598 | `~:X' | |
6599 | print comma separated. | |
6600 | ||
6601 | `~MINCOL,PADCHAR,COMMACHARX' | |
6602 | padding. | |
6603 | ||
6604 | `~O' | |
6605 | Octal. | |
6606 | `~@O' | |
6607 | print number sign always. | |
6608 | ||
6609 | `~:O' | |
6610 | print comma separated. | |
6611 | ||
6612 | `~MINCOL,PADCHAR,COMMACHARO' | |
6613 | padding. | |
6614 | ||
6615 | `~B' | |
6616 | Binary. | |
6617 | `~@B' | |
6618 | print number sign always. | |
6619 | ||
6620 | `~:B' | |
6621 | print comma separated. | |
6622 | ||
6623 | `~MINCOL,PADCHAR,COMMACHARB' | |
6624 | padding. | |
6625 | ||
6626 | `~NR' | |
6627 | Radix N. | |
6628 | `~N,MINCOL,PADCHAR,COMMACHARR' | |
6629 | padding. | |
6630 | ||
6631 | `~@R' | |
6632 | print a number as a Roman numeral. | |
6633 | ||
6634 | `~:@R' | |
6635 | print a number as an "old fashioned" Roman numeral. | |
6636 | ||
6637 | `~:R' | |
6638 | print a number as an ordinal English number. | |
6639 | ||
6640 | `~:@R' | |
6641 | print a number as a cardinal English number. | |
6642 | ||
6643 | `~P' | |
6644 | Plural. | |
6645 | `~@P' | |
6646 | prints `y' and `ies'. | |
6647 | ||
6648 | `~:P' | |
6649 | as `~P but jumps 1 argument backward.' | |
6650 | ||
6651 | `~:@P' | |
6652 | as `~@P but jumps 1 argument backward.' | |
6653 | ||
6654 | `~C' | |
6655 | Character. | |
6656 | `~@C' | |
6657 | prints a character as the reader can understand it (i.e. `#\' | |
6658 | prefixing). | |
6659 | ||
6660 | `~:C' | |
6661 | prints a character as emacs does (eg. `^C' for ASCII 03). | |
6662 | ||
6663 | `~F' | |
6664 | Fixed-format floating-point (prints a flonum like MMM.NNN). | |
6665 | `~WIDTH,DIGITS,SCALE,OVERFLOWCHAR,PADCHARF' | |
6666 | `~@F' | |
6667 | If the number is positive a plus sign is printed. | |
6668 | ||
6669 | `~E' | |
6670 | Exponential floating-point (prints a flonum like MMM.NNN`E'EE). | |
6671 | `~WIDTH,DIGITS,EXPONENTDIGITS,SCALE,OVERFLOWCHAR,PADCHAR,EXPONENTCHARE' | |
6672 | `~@E' | |
6673 | If the number is positive a plus sign is printed. | |
6674 | ||
6675 | `~G' | |
6676 | General floating-point (prints a flonum either fixed or | |
6677 | exponential). | |
6678 | `~WIDTH,DIGITS,EXPONENTDIGITS,SCALE,OVERFLOWCHAR,PADCHAR,EXPONENTCHARG' | |
6679 | `~@G' | |
6680 | If the number is positive a plus sign is printed. | |
6681 | ||
6682 | `~$' | |
6683 | Dollars floating-point (prints a flonum in fixed with signs | |
6684 | separated). | |
6685 | `~DIGITS,SCALE,WIDTH,PADCHAR$' | |
6686 | `~@$' | |
6687 | If the number is positive a plus sign is printed. | |
6688 | ||
6689 | `~:@$' | |
6690 | A sign is always printed and appears before the padding. | |
6691 | ||
6692 | `~:$' | |
6693 | The sign appears before the padding. | |
6694 | ||
6695 | `~%' | |
6696 | Newline. | |
6697 | `~N%' | |
6698 | print N newlines. | |
6699 | ||
6700 | `~&' | |
6701 | print newline if not at the beginning of the output line. | |
6702 | `~N&' | |
6703 | prints `~&' and then N-1 newlines. | |
6704 | ||
6705 | `~|' | |
6706 | Page Separator. | |
6707 | `~N|' | |
6708 | print N page separators. | |
6709 | ||
6710 | `~~' | |
6711 | Tilde. | |
6712 | `~N~' | |
6713 | print N tildes. | |
6714 | ||
6715 | `~'<newline> | |
6716 | Continuation Line. | |
6717 | `~:'<newline> | |
6718 | newline is ignored, white space left. | |
6719 | ||
6720 | `~@'<newline> | |
6721 | newline is left, white space ignored. | |
6722 | ||
6723 | `~T' | |
6724 | Tabulation. | |
6725 | `~@T' | |
6726 | relative tabulation. | |
6727 | ||
6728 | `~COLNUM,COLINCT' | |
6729 | full tabulation. | |
6730 | ||
6731 | `~?' | |
6732 | Indirection (expects indirect arguments as a list). | |
6733 | `~@?' | |
6734 | extracts indirect arguments from format arguments. | |
6735 | ||
6736 | `~(STR~)' | |
6737 | Case conversion (converts by `string-downcase'). | |
6738 | `~:(STR~)' | |
6739 | converts by `string-capitalize'. | |
6740 | ||
6741 | `~@(STR~)' | |
6742 | converts by `string-capitalize-first'. | |
6743 | ||
6744 | `~:@(STR~)' | |
6745 | converts by `string-upcase'. | |
6746 | ||
6747 | `~*' | |
6748 | Argument Jumping (jumps 1 argument forward). | |
6749 | `~N*' | |
6750 | jumps N arguments forward. | |
6751 | ||
6752 | `~:*' | |
6753 | jumps 1 argument backward. | |
6754 | ||
6755 | `~N:*' | |
6756 | jumps N arguments backward. | |
6757 | ||
6758 | `~@*' | |
6759 | jumps to the 0th argument. | |
6760 | ||
6761 | `~N@*' | |
6762 | jumps to the Nth argument (beginning from 0) | |
6763 | ||
6764 | `~[STR0~;STR1~;...~;STRN~]' | |
6765 | Conditional Expression (numerical clause conditional). | |
6766 | `~N[' | |
6767 | take argument from N. | |
6768 | ||
6769 | `~@[' | |
6770 | true test conditional. | |
6771 | ||
6772 | `~:[' | |
6773 | if-else-then conditional. | |
6774 | ||
6775 | `~;' | |
6776 | clause separator. | |
6777 | ||
6778 | `~:;' | |
6779 | default clause follows. | |
6780 | ||
6781 | `~{STR~}' | |
6782 | Iteration (args come from the next argument (a list)). | |
6783 | `~N{' | |
6784 | at most N iterations. | |
6785 | ||
6786 | `~:{' | |
6787 | args from next arg (a list of lists). | |
6788 | ||
6789 | `~@{' | |
6790 | args from the rest of arguments. | |
6791 | ||
6792 | `~:@{' | |
6793 | args from the rest args (lists). | |
6794 | ||
6795 | `~^' | |
6796 | Up and out. | |
6797 | `~N^' | |
6798 | aborts if N = 0 | |
6799 | ||
6800 | `~N,M^' | |
6801 | aborts if N = M | |
6802 | ||
6803 | `~N,M,K^' | |
6804 | aborts if N <= M <= K | |
6805 | ||
6806 | *** Not Implemented CL Format Control Directives | |
6807 | ||
6808 | `~:A' | |
6809 | print `#f' as an empty list (see below). | |
6810 | ||
6811 | `~:S' | |
6812 | print `#f' as an empty list (see below). | |
6813 | ||
6814 | `~<~>' | |
6815 | Justification. | |
6816 | ||
6817 | `~:^' | |
6818 | (sorry I don't understand its semantics completely) | |
6819 | ||
6820 | *** Extended, Replaced and Additional Control Directives | |
6821 | ||
6822 | `~MINCOL,PADCHAR,COMMACHAR,COMMAWIDTHD' | |
6823 | `~MINCOL,PADCHAR,COMMACHAR,COMMAWIDTHX' | |
6824 | `~MINCOL,PADCHAR,COMMACHAR,COMMAWIDTHO' | |
6825 | `~MINCOL,PADCHAR,COMMACHAR,COMMAWIDTHB' | |
6826 | `~N,MINCOL,PADCHAR,COMMACHAR,COMMAWIDTHR' | |
6827 | COMMAWIDTH is the number of characters between two comma | |
6828 | characters. | |
6829 | ||
6830 | `~I' | |
6831 | print a R4RS complex number as `~F~@Fi' with passed parameters for | |
6832 | `~F'. | |
6833 | ||
6834 | `~Y' | |
6835 | Pretty print formatting of an argument for scheme code lists. | |
6836 | ||
6837 | `~K' | |
6838 | Same as `~?.' | |
6839 | ||
6840 | `~!' | |
6841 | Flushes the output if format DESTINATION is a port. | |
6842 | ||
6843 | `~_' | |
6844 | Print a `#\space' character | |
6845 | `~N_' | |
6846 | print N `#\space' characters. | |
6847 | ||
6848 | `~/' | |
6849 | Print a `#\tab' character | |
6850 | `~N/' | |
6851 | print N `#\tab' characters. | |
6852 | ||
6853 | `~NC' | |
6854 | Takes N as an integer representation for a character. No arguments | |
6855 | are consumed. N is converted to a character by `integer->char'. N | |
6856 | must be a positive decimal number. | |
6857 | ||
6858 | `~:S' | |
6859 | Print out readproof. Prints out internal objects represented as | |
6860 | `#<...>' as strings `"#<...>"' so that the format output can always | |
6861 | be processed by `read'. | |
6862 | ||
6863 | `~:A' | |
6864 | Print out readproof. Prints out internal objects represented as | |
6865 | `#<...>' as strings `"#<...>"' so that the format output can always | |
6866 | be processed by `read'. | |
6867 | ||
6868 | `~Q' | |
6869 | Prints information and a copyright notice on the format | |
6870 | implementation. | |
6871 | `~:Q' | |
6872 | prints format version. | |
6873 | ||
6874 | `~F, ~E, ~G, ~$' | |
6875 | may also print number strings, i.e. passing a number as a string | |
6876 | and format it accordingly. | |
6877 | ||
6878 | *** Configuration Variables | |
6879 | ||
6880 | The format module exports some configuration variables to suit the | |
6881 | systems and users needs. There should be no modification necessary for | |
6882 | the configuration that comes with Guile. Format detects automatically | |
6883 | if the running scheme system implements floating point numbers and | |
6884 | complex numbers. | |
6885 | ||
6886 | format:symbol-case-conv | |
6887 | Symbols are converted by `symbol->string' so the case type of the | |
6888 | printed symbols is implementation dependent. | |
6889 | `format:symbol-case-conv' is a one arg closure which is either | |
6890 | `#f' (no conversion), `string-upcase', `string-downcase' or | |
6891 | `string-capitalize'. (default `#f') | |
6892 | ||
6893 | format:iobj-case-conv | |
6894 | As FORMAT:SYMBOL-CASE-CONV but applies for the representation of | |
6895 | implementation internal objects. (default `#f') | |
6896 | ||
6897 | format:expch | |
6898 | The character prefixing the exponent value in `~E' printing. | |
6899 | (default `#\E') | |
6900 | ||
6901 | *** Compatibility With Other Format Implementations | |
6902 | ||
6903 | SLIB format 2.x: | |
6904 | See `format.doc'. | |
6905 | ||
6906 | SLIB format 1.4: | |
6907 | Downward compatible except for padding support and `~A', `~S', | |
6908 | `~P', `~X' uppercase printing. SLIB format 1.4 uses C-style | |
6909 | `printf' padding support which is completely replaced by the CL | |
6910 | `format' padding style. | |
6911 | ||
6912 | MIT C-Scheme 7.1: | |
6913 | Downward compatible except for `~', which is not documented | |
6914 | (ignores all characters inside the format string up to a newline | |
6915 | character). (7.1 implements `~a', `~s', ~NEWLINE, `~~', `~%', | |
6916 | numerical and variable parameters and `:/@' modifiers in the CL | |
6917 | sense). | |
6918 | ||
6919 | Elk 1.5/2.0: | |
6920 | Downward compatible except for `~A' and `~S' which print in | |
6921 | uppercase. (Elk implements `~a', `~s', `~~', and `~%' (no | |
6922 | directive parameters or modifiers)). | |
6923 | ||
6924 | Scheme->C 01nov91: | |
6925 | Downward compatible except for an optional destination parameter: | |
6926 | S2C accepts a format call without a destination which returns a | |
6927 | formatted string. This is equivalent to a #f destination in S2C. | |
6928 | (S2C implements `~a', `~s', `~c', `~%', and `~~' (no directive | |
6929 | parameters or modifiers)). | |
6930 | ||
6931 | ||
e7d37b0a | 6932 | ** Changes to string-handling functions. |
b7e13f65 | 6933 | |
e7d37b0a | 6934 | These functions were added to support the (ice-9 format) module, above. |
b7e13f65 | 6935 | |
e7d37b0a JB |
6936 | *** New function: string-upcase STRING |
6937 | *** New function: string-downcase STRING | |
b7e13f65 | 6938 | |
e7d37b0a JB |
6939 | These are non-destructive versions of the existing string-upcase! and |
6940 | string-downcase! functions. | |
b7e13f65 | 6941 | |
e7d37b0a JB |
6942 | *** New function: string-capitalize! STRING |
6943 | *** New function: string-capitalize STRING | |
6944 | ||
6945 | These functions convert the first letter of each word in the string to | |
6946 | upper case. Thus: | |
6947 | ||
6948 | (string-capitalize "howdy there") | |
6949 | => "Howdy There" | |
6950 | ||
6951 | As with the other functions, string-capitalize! modifies the string in | |
6952 | place, while string-capitalize returns a modified copy of its argument. | |
6953 | ||
6954 | *** New function: string-ci->symbol STRING | |
6955 | ||
6956 | Return a symbol whose name is STRING, but having the same case as if | |
6957 | the symbol had be read by `read'. | |
6958 | ||
6959 | Guile can be configured to be sensitive or insensitive to case | |
6960 | differences in Scheme identifiers. If Guile is case-insensitive, all | |
6961 | symbols are converted to lower case on input. The `string-ci->symbol' | |
6962 | function returns a symbol whose name in STRING, transformed as Guile | |
6963 | would if STRING were input. | |
6964 | ||
6965 | *** New function: substring-move! STRING1 START END STRING2 START | |
6966 | ||
6967 | Copy the substring of STRING1 from START (inclusive) to END | |
6968 | (exclusive) to STRING2 at START. STRING1 and STRING2 may be the same | |
6969 | string, and the source and destination areas may overlap; in all | |
6970 | cases, the function behaves as if all the characters were copied | |
6971 | simultanously. | |
6972 | ||
6c0201ad | 6973 | *** Extended functions: substring-move-left! substring-move-right! |
e7d37b0a JB |
6974 | |
6975 | These functions now correctly copy arbitrarily overlapping substrings; | |
6976 | they are both synonyms for substring-move!. | |
b7e13f65 | 6977 | |
b7e13f65 | 6978 | |
deaceb4e JB |
6979 | ** New module (ice-9 getopt-long), with the function `getopt-long'. |
6980 | ||
6981 | getopt-long is a function for parsing command-line arguments in a | |
6982 | manner consistent with other GNU programs. | |
6983 | ||
6984 | (getopt-long ARGS GRAMMAR) | |
6985 | Parse the arguments ARGS according to the argument list grammar GRAMMAR. | |
6986 | ||
6987 | ARGS should be a list of strings. Its first element should be the | |
6988 | name of the program; subsequent elements should be the arguments | |
6989 | that were passed to the program on the command line. The | |
6990 | `program-arguments' procedure returns a list of this form. | |
6991 | ||
6992 | GRAMMAR is a list of the form: | |
6993 | ((OPTION (PROPERTY VALUE) ...) ...) | |
6994 | ||
6995 | Each OPTION should be a symbol. `getopt-long' will accept a | |
6996 | command-line option named `--OPTION'. | |
6997 | Each option can have the following (PROPERTY VALUE) pairs: | |
6998 | ||
6999 | (single-char CHAR) --- Accept `-CHAR' as a single-character | |
7000 | equivalent to `--OPTION'. This is how to specify traditional | |
7001 | Unix-style flags. | |
7002 | (required? BOOL) --- If BOOL is true, the option is required. | |
7003 | getopt-long will raise an error if it is not found in ARGS. | |
7004 | (value BOOL) --- If BOOL is #t, the option accepts a value; if | |
7005 | it is #f, it does not; and if it is the symbol | |
7006 | `optional', the option may appear in ARGS with or | |
6c0201ad | 7007 | without a value. |
deaceb4e JB |
7008 | (predicate FUNC) --- If the option accepts a value (i.e. you |
7009 | specified `(value #t)' for this option), then getopt | |
7010 | will apply FUNC to the value, and throw an exception | |
7011 | if it returns #f. FUNC should be a procedure which | |
7012 | accepts a string and returns a boolean value; you may | |
7013 | need to use quasiquotes to get it into GRAMMAR. | |
7014 | ||
7015 | The (PROPERTY VALUE) pairs may occur in any order, but each | |
7016 | property may occur only once. By default, options do not have | |
7017 | single-character equivalents, are not required, and do not take | |
7018 | values. | |
7019 | ||
7020 | In ARGS, single-character options may be combined, in the usual | |
7021 | Unix fashion: ("-x" "-y") is equivalent to ("-xy"). If an option | |
7022 | accepts values, then it must be the last option in the | |
7023 | combination; the value is the next argument. So, for example, using | |
7024 | the following grammar: | |
7025 | ((apples (single-char #\a)) | |
7026 | (blimps (single-char #\b) (value #t)) | |
7027 | (catalexis (single-char #\c) (value #t))) | |
7028 | the following argument lists would be acceptable: | |
7029 | ("-a" "-b" "bang" "-c" "couth") ("bang" and "couth" are the values | |
7030 | for "blimps" and "catalexis") | |
7031 | ("-ab" "bang" "-c" "couth") (same) | |
7032 | ("-ac" "couth" "-b" "bang") (same) | |
7033 | ("-abc" "couth" "bang") (an error, since `-b' is not the | |
7034 | last option in its combination) | |
7035 | ||
7036 | If an option's value is optional, then `getopt-long' decides | |
7037 | whether it has a value by looking at what follows it in ARGS. If | |
7038 | the next element is a string, and it does not appear to be an | |
7039 | option itself, then that string is the option's value. | |
7040 | ||
7041 | The value of a long option can appear as the next element in ARGS, | |
7042 | or it can follow the option name, separated by an `=' character. | |
7043 | Thus, using the same grammar as above, the following argument lists | |
7044 | are equivalent: | |
7045 | ("--apples" "Braeburn" "--blimps" "Goodyear") | |
7046 | ("--apples=Braeburn" "--blimps" "Goodyear") | |
7047 | ("--blimps" "Goodyear" "--apples=Braeburn") | |
7048 | ||
7049 | If the option "--" appears in ARGS, argument parsing stops there; | |
7050 | subsequent arguments are returned as ordinary arguments, even if | |
7051 | they resemble options. So, in the argument list: | |
7052 | ("--apples" "Granny Smith" "--" "--blimp" "Goodyear") | |
7053 | `getopt-long' will recognize the `apples' option as having the | |
7054 | value "Granny Smith", but it will not recognize the `blimp' | |
7055 | option; it will return the strings "--blimp" and "Goodyear" as | |
7056 | ordinary argument strings. | |
7057 | ||
7058 | The `getopt-long' function returns the parsed argument list as an | |
7059 | assocation list, mapping option names --- the symbols from GRAMMAR | |
7060 | --- onto their values, or #t if the option does not accept a value. | |
7061 | Unused options do not appear in the alist. | |
7062 | ||
7063 | All arguments that are not the value of any option are returned | |
7064 | as a list, associated with the empty list. | |
7065 | ||
7066 | `getopt-long' throws an exception if: | |
7067 | - it finds an unrecognized option in ARGS | |
7068 | - a required option is omitted | |
7069 | - an option that requires an argument doesn't get one | |
7070 | - an option that doesn't accept an argument does get one (this can | |
7071 | only happen using the long option `--opt=value' syntax) | |
7072 | - an option predicate fails | |
7073 | ||
7074 | So, for example: | |
7075 | ||
7076 | (define grammar | |
7077 | `((lockfile-dir (required? #t) | |
7078 | (value #t) | |
7079 | (single-char #\k) | |
7080 | (predicate ,file-is-directory?)) | |
7081 | (verbose (required? #f) | |
7082 | (single-char #\v) | |
7083 | (value #f)) | |
7084 | (x-includes (single-char #\x)) | |
6c0201ad | 7085 | (rnet-server (single-char #\y) |
deaceb4e JB |
7086 | (predicate ,string?)))) |
7087 | ||
6c0201ad | 7088 | (getopt-long '("my-prog" "-vk" "/tmp" "foo1" "--x-includes=/usr/include" |
deaceb4e JB |
7089 | "--rnet-server=lamprod" "--" "-fred" "foo2" "foo3") |
7090 | grammar) | |
7091 | => ((() "foo1" "-fred" "foo2" "foo3") | |
7092 | (rnet-server . "lamprod") | |
7093 | (x-includes . "/usr/include") | |
7094 | (lockfile-dir . "/tmp") | |
7095 | (verbose . #t)) | |
7096 | ||
7097 | ** The (ice-9 getopt-gnu-style) module is obsolete; use (ice-9 getopt-long). | |
7098 | ||
7099 | It will be removed in a few releases. | |
7100 | ||
08394899 MS |
7101 | ** New syntax: lambda* |
7102 | ** New syntax: define* | |
6c0201ad | 7103 | ** New syntax: define*-public |
08394899 MS |
7104 | ** New syntax: defmacro* |
7105 | ** New syntax: defmacro*-public | |
6c0201ad | 7106 | Guile now supports optional arguments. |
08394899 MS |
7107 | |
7108 | `lambda*', `define*', `define*-public', `defmacro*' and | |
7109 | `defmacro*-public' are identical to the non-* versions except that | |
7110 | they use an extended type of parameter list that has the following BNF | |
7111 | syntax (parentheses are literal, square brackets indicate grouping, | |
7112 | and `*', `+' and `?' have the usual meaning): | |
7113 | ||
7114 | ext-param-list ::= ( [identifier]* [#&optional [ext-var-decl]+]? | |
6c0201ad | 7115 | [#&key [ext-var-decl]+ [#&allow-other-keys]?]? |
08394899 MS |
7116 | [[#&rest identifier]|[. identifier]]? ) | [identifier] |
7117 | ||
6c0201ad | 7118 | ext-var-decl ::= identifier | ( identifier expression ) |
08394899 MS |
7119 | |
7120 | The semantics are best illustrated with the following documentation | |
7121 | and examples for `lambda*': | |
7122 | ||
7123 | lambda* args . body | |
7124 | lambda extended for optional and keyword arguments | |
6c0201ad | 7125 | |
08394899 MS |
7126 | lambda* creates a procedure that takes optional arguments. These |
7127 | are specified by putting them inside brackets at the end of the | |
7128 | paramater list, but before any dotted rest argument. For example, | |
7129 | (lambda* (a b #&optional c d . e) '()) | |
7130 | creates a procedure with fixed arguments a and b, optional arguments c | |
7131 | and d, and rest argument e. If the optional arguments are omitted | |
7132 | in a call, the variables for them are unbound in the procedure. This | |
7133 | can be checked with the bound? macro. | |
7134 | ||
7135 | lambda* can also take keyword arguments. For example, a procedure | |
7136 | defined like this: | |
7137 | (lambda* (#&key xyzzy larch) '()) | |
7138 | can be called with any of the argument lists (#:xyzzy 11) | |
7139 | (#:larch 13) (#:larch 42 #:xyzzy 19) (). Whichever arguments | |
7140 | are given as keywords are bound to values. | |
7141 | ||
7142 | Optional and keyword arguments can also be given default values | |
7143 | which they take on when they are not present in a call, by giving a | |
7144 | two-item list in place of an optional argument, for example in: | |
6c0201ad | 7145 | (lambda* (foo #&optional (bar 42) #&key (baz 73)) (list foo bar baz)) |
08394899 MS |
7146 | foo is a fixed argument, bar is an optional argument with default |
7147 | value 42, and baz is a keyword argument with default value 73. | |
7148 | Default value expressions are not evaluated unless they are needed | |
6c0201ad | 7149 | and until the procedure is called. |
08394899 MS |
7150 | |
7151 | lambda* now supports two more special parameter list keywords. | |
7152 | ||
7153 | lambda*-defined procedures now throw an error by default if a | |
7154 | keyword other than one of those specified is found in the actual | |
7155 | passed arguments. However, specifying #&allow-other-keys | |
7156 | immediately after the kyword argument declarations restores the | |
7157 | previous behavior of ignoring unknown keywords. lambda* also now | |
7158 | guarantees that if the same keyword is passed more than once, the | |
7159 | last one passed is the one that takes effect. For example, | |
7160 | ((lambda* (#&key (heads 0) (tails 0)) (display (list heads tails))) | |
7161 | #:heads 37 #:tails 42 #:heads 99) | |
7162 | would result in (99 47) being displayed. | |
7163 | ||
7164 | #&rest is also now provided as a synonym for the dotted syntax rest | |
7165 | argument. The argument lists (a . b) and (a #&rest b) are equivalent in | |
7166 | all respects to lambda*. This is provided for more similarity to DSSSL, | |
7167 | MIT-Scheme and Kawa among others, as well as for refugees from other | |
7168 | Lisp dialects. | |
7169 | ||
7170 | Further documentation may be found in the optargs.scm file itself. | |
7171 | ||
7172 | The optional argument module also exports the macros `let-optional', | |
7173 | `let-optional*', `let-keywords', `let-keywords*' and `bound?'. These | |
7174 | are not documented here because they may be removed in the future, but | |
7175 | full documentation is still available in optargs.scm. | |
7176 | ||
2e132553 JB |
7177 | ** New syntax: and-let* |
7178 | Guile now supports the `and-let*' form, described in the draft SRFI-2. | |
7179 | ||
7180 | Syntax: (land* (<clause> ...) <body> ...) | |
7181 | Each <clause> should have one of the following forms: | |
7182 | (<variable> <expression>) | |
7183 | (<expression>) | |
7184 | <bound-variable> | |
7185 | Each <variable> or <bound-variable> should be an identifier. Each | |
7186 | <expression> should be a valid expression. The <body> should be a | |
7187 | possibly empty sequence of expressions, like the <body> of a | |
7188 | lambda form. | |
7189 | ||
7190 | Semantics: A LAND* expression is evaluated by evaluating the | |
7191 | <expression> or <bound-variable> of each of the <clause>s from | |
7192 | left to right. The value of the first <expression> or | |
7193 | <bound-variable> that evaluates to a false value is returned; the | |
7194 | remaining <expression>s and <bound-variable>s are not evaluated. | |
7195 | The <body> forms are evaluated iff all the <expression>s and | |
7196 | <bound-variable>s evaluate to true values. | |
7197 | ||
7198 | The <expression>s and the <body> are evaluated in an environment | |
7199 | binding each <variable> of the preceding (<variable> <expression>) | |
7200 | clauses to the value of the <expression>. Later bindings | |
7201 | shadow earlier bindings. | |
7202 | ||
7203 | Guile's and-let* macro was contributed by Michael Livshin. | |
7204 | ||
36d3d540 MD |
7205 | ** New sorting functions |
7206 | ||
7207 | *** New function: sorted? SEQUENCE LESS? | |
ed8c8636 MD |
7208 | Returns `#t' when the sequence argument is in non-decreasing order |
7209 | according to LESS? (that is, there is no adjacent pair `... x y | |
7210 | ...' for which `(less? y x)'). | |
7211 | ||
7212 | Returns `#f' when the sequence contains at least one out-of-order | |
7213 | pair. It is an error if the sequence is neither a list nor a | |
7214 | vector. | |
7215 | ||
36d3d540 | 7216 | *** New function: merge LIST1 LIST2 LESS? |
ed8c8636 MD |
7217 | LIST1 and LIST2 are sorted lists. |
7218 | Returns the sorted list of all elements in LIST1 and LIST2. | |
7219 | ||
7220 | Assume that the elements a and b1 in LIST1 and b2 in LIST2 are "equal" | |
7221 | in the sense that (LESS? x y) --> #f for x, y in {a, b1, b2}, | |
7222 | and that a < b1 in LIST1. Then a < b1 < b2 in the result. | |
7223 | (Here "<" should read "comes before".) | |
7224 | ||
36d3d540 | 7225 | *** New procedure: merge! LIST1 LIST2 LESS? |
ed8c8636 MD |
7226 | Merges two lists, re-using the pairs of LIST1 and LIST2 to build |
7227 | the result. If the code is compiled, and LESS? constructs no new | |
7228 | pairs, no pairs at all will be allocated. The first pair of the | |
7229 | result will be either the first pair of LIST1 or the first pair of | |
7230 | LIST2. | |
7231 | ||
36d3d540 | 7232 | *** New function: sort SEQUENCE LESS? |
ed8c8636 MD |
7233 | Accepts either a list or a vector, and returns a new sequence |
7234 | which is sorted. The new sequence is the same type as the input. | |
7235 | Always `(sorted? (sort sequence less?) less?)'. The original | |
7236 | sequence is not altered in any way. The new sequence shares its | |
7237 | elements with the old one; no elements are copied. | |
7238 | ||
36d3d540 | 7239 | *** New procedure: sort! SEQUENCE LESS |
ed8c8636 MD |
7240 | Returns its sorted result in the original boxes. No new storage is |
7241 | allocated at all. Proper usage: (set! slist (sort! slist <)) | |
7242 | ||
36d3d540 | 7243 | *** New function: stable-sort SEQUENCE LESS? |
ed8c8636 MD |
7244 | Similar to `sort' but stable. That is, if "equal" elements are |
7245 | ordered a < b in the original sequence, they will have the same order | |
7246 | in the result. | |
7247 | ||
36d3d540 | 7248 | *** New function: stable-sort! SEQUENCE LESS? |
ed8c8636 MD |
7249 | Similar to `sort!' but stable. |
7250 | Uses temporary storage when sorting vectors. | |
7251 | ||
36d3d540 | 7252 | *** New functions: sort-list, sort-list! |
ed8c8636 MD |
7253 | Added for compatibility with scsh. |
7254 | ||
36d3d540 MD |
7255 | ** New built-in random number support |
7256 | ||
7257 | *** New function: random N [STATE] | |
3e8370c3 MD |
7258 | Accepts a positive integer or real N and returns a number of the |
7259 | same type between zero (inclusive) and N (exclusive). The values | |
7260 | returned have a uniform distribution. | |
7261 | ||
7262 | The optional argument STATE must be of the type produced by | |
416075f1 MD |
7263 | `copy-random-state' or `seed->random-state'. It defaults to the value |
7264 | of the variable `*random-state*'. This object is used to maintain the | |
7265 | state of the pseudo-random-number generator and is altered as a side | |
7266 | effect of the `random' operation. | |
3e8370c3 | 7267 | |
36d3d540 | 7268 | *** New variable: *random-state* |
3e8370c3 MD |
7269 | Holds a data structure that encodes the internal state of the |
7270 | random-number generator that `random' uses by default. The nature | |
7271 | of this data structure is implementation-dependent. It may be | |
7272 | printed out and successfully read back in, but may or may not | |
7273 | function correctly as a random-number state object in another | |
7274 | implementation. | |
7275 | ||
36d3d540 | 7276 | *** New function: copy-random-state [STATE] |
3e8370c3 MD |
7277 | Returns a new object of type suitable for use as the value of the |
7278 | variable `*random-state*' and as a second argument to `random'. | |
7279 | If argument STATE is given, a copy of it is returned. Otherwise a | |
7280 | copy of `*random-state*' is returned. | |
416075f1 | 7281 | |
36d3d540 | 7282 | *** New function: seed->random-state SEED |
416075f1 MD |
7283 | Returns a new object of type suitable for use as the value of the |
7284 | variable `*random-state*' and as a second argument to `random'. | |
7285 | SEED is a string or a number. A new state is generated and | |
7286 | initialized using SEED. | |
3e8370c3 | 7287 | |
36d3d540 | 7288 | *** New function: random:uniform [STATE] |
3e8370c3 MD |
7289 | Returns an uniformly distributed inexact real random number in the |
7290 | range between 0 and 1. | |
7291 | ||
36d3d540 | 7292 | *** New procedure: random:solid-sphere! VECT [STATE] |
3e8370c3 MD |
7293 | Fills VECT with inexact real random numbers the sum of whose |
7294 | squares is less than 1.0. Thinking of VECT as coordinates in | |
7295 | space of dimension N = `(vector-length VECT)', the coordinates are | |
7296 | uniformly distributed within the unit N-shere. The sum of the | |
7297 | squares of the numbers is returned. VECT can be either a vector | |
7298 | or a uniform vector of doubles. | |
7299 | ||
36d3d540 | 7300 | *** New procedure: random:hollow-sphere! VECT [STATE] |
3e8370c3 MD |
7301 | Fills VECT with inexact real random numbers the sum of whose squares |
7302 | is equal to 1.0. Thinking of VECT as coordinates in space of | |
7303 | dimension n = `(vector-length VECT)', the coordinates are uniformly | |
7304 | distributed over the surface of the unit n-shere. VECT can be either | |
7305 | a vector or a uniform vector of doubles. | |
7306 | ||
36d3d540 | 7307 | *** New function: random:normal [STATE] |
3e8370c3 MD |
7308 | Returns an inexact real in a normal distribution with mean 0 and |
7309 | standard deviation 1. For a normal distribution with mean M and | |
7310 | standard deviation D use `(+ M (* D (random:normal)))'. | |
7311 | ||
36d3d540 | 7312 | *** New procedure: random:normal-vector! VECT [STATE] |
3e8370c3 MD |
7313 | Fills VECT with inexact real random numbers which are independent and |
7314 | standard normally distributed (i.e., with mean 0 and variance 1). | |
7315 | VECT can be either a vector or a uniform vector of doubles. | |
7316 | ||
36d3d540 | 7317 | *** New function: random:exp STATE |
3e8370c3 MD |
7318 | Returns an inexact real in an exponential distribution with mean 1. |
7319 | For an exponential distribution with mean U use (* U (random:exp)). | |
7320 | ||
69c6acbb JB |
7321 | ** The range of logand, logior, logxor, logtest, and logbit? have changed. |
7322 | ||
7323 | These functions now operate on numbers in the range of a C unsigned | |
7324 | long. | |
7325 | ||
7326 | These functions used to operate on numbers in the range of a C signed | |
7327 | long; however, this seems inappropriate, because Guile integers don't | |
7328 | overflow. | |
7329 | ||
ba4ee0d6 MD |
7330 | ** New function: make-guardian |
7331 | This is an implementation of guardians as described in | |
7332 | R. Kent Dybvig, Carl Bruggeman, and David Eby (1993) "Guardians in a | |
7333 | Generation-Based Garbage Collector" ACM SIGPLAN Conference on | |
7334 | Programming Language Design and Implementation, June 1993 | |
7335 | ftp://ftp.cs.indiana.edu/pub/scheme-repository/doc/pubs/guardians.ps.gz | |
7336 | ||
88ceea5c MD |
7337 | ** New functions: delq1!, delv1!, delete1! |
7338 | These procedures behave similar to delq! and friends but delete only | |
7339 | one object if at all. | |
7340 | ||
55254a6a MD |
7341 | ** New function: unread-string STRING PORT |
7342 | Unread STRING to PORT, that is, push it back onto the port so that | |
7343 | next read operation will work on the pushed back characters. | |
7344 | ||
7345 | ** unread-char can now be called multiple times | |
7346 | If unread-char is called multiple times, the unread characters will be | |
7347 | read again in last-in first-out order. | |
7348 | ||
9e97c52d GH |
7349 | ** the procedures uniform-array-read! and uniform-array-write! now |
7350 | work on any kind of port, not just ports which are open on a file. | |
7351 | ||
b074884f | 7352 | ** Now 'l' in a port mode requests line buffering. |
9e97c52d | 7353 | |
69bc9ff3 GH |
7354 | ** The procedure truncate-file now works on string ports as well |
7355 | as file ports. If the size argument is omitted, the current | |
1b9c3dae | 7356 | file position is used. |
9e97c52d | 7357 | |
c94577b4 | 7358 | ** new procedure: seek PORT/FDES OFFSET WHENCE |
9e97c52d GH |
7359 | The arguments are the same as for the old fseek procedure, but it |
7360 | works on string ports as well as random-access file ports. | |
7361 | ||
7362 | ** the fseek procedure now works on string ports, since it has been | |
c94577b4 | 7363 | redefined using seek. |
9e97c52d GH |
7364 | |
7365 | ** the setvbuf procedure now uses a default size if mode is _IOFBF and | |
7366 | size is not supplied. | |
7367 | ||
7368 | ** the newline procedure no longer flushes the port if it's not | |
7369 | line-buffered: previously it did if it was the current output port. | |
7370 | ||
7371 | ** open-pipe and close-pipe are no longer primitive procedures, but | |
7372 | an emulation can be obtained using `(use-modules (ice-9 popen))'. | |
7373 | ||
7374 | ** the freopen procedure has been removed. | |
7375 | ||
7376 | ** new procedure: drain-input PORT | |
7377 | Drains PORT's read buffers (including any pushed-back characters) | |
7378 | and returns the contents as a single string. | |
7379 | ||
67ad463a | 7380 | ** New function: map-in-order PROC LIST1 LIST2 ... |
d41b3904 MD |
7381 | Version of `map' which guarantees that the procedure is applied to the |
7382 | lists in serial order. | |
7383 | ||
67ad463a MD |
7384 | ** Renamed `serial-array-copy!' and `serial-array-map!' to |
7385 | `array-copy-in-order!' and `array-map-in-order!'. The old names are | |
7386 | now obsolete and will go away in release 1.5. | |
7387 | ||
cf7132b3 | 7388 | ** New syntax: collect BODY1 ... |
d41b3904 MD |
7389 | Version of `begin' which returns a list of the results of the body |
7390 | forms instead of the result of the last body form. In contrast to | |
cf7132b3 | 7391 | `begin', `collect' allows an empty body. |
d41b3904 | 7392 | |
e4eae9b1 MD |
7393 | ** New functions: read-history FILENAME, write-history FILENAME |
7394 | Read/write command line history from/to file. Returns #t on success | |
7395 | and #f if an error occured. | |
7396 | ||
d21ffe26 JB |
7397 | ** `ls' and `lls' in module (ice-9 ls) now handle no arguments. |
7398 | ||
7399 | These procedures return a list of definitions available in the specified | |
7400 | argument, a relative module reference. In the case of no argument, | |
7401 | `(current-module)' is now consulted for definitions to return, instead | |
7402 | of simply returning #f, the former behavior. | |
7403 | ||
f8c9d497 JB |
7404 | ** The #/ syntax for lists is no longer supported. |
7405 | ||
7406 | Earlier versions of Scheme accepted this syntax, but printed a | |
7407 | warning. | |
7408 | ||
7409 | ** Guile no longer consults the SCHEME_LOAD_PATH environment variable. | |
7410 | ||
7411 | Instead, you should set GUILE_LOAD_PATH to tell Guile where to find | |
7412 | modules. | |
7413 | ||
3ffc7a36 MD |
7414 | * Changes to the gh_ interface |
7415 | ||
7416 | ** gh_scm2doubles | |
7417 | ||
7418 | Now takes a second argument which is the result array. If this | |
7419 | pointer is NULL, a new array is malloced (the old behaviour). | |
7420 | ||
7421 | ** gh_chars2byvect, gh_shorts2svect, gh_floats2fvect, gh_scm2chars, | |
7422 | gh_scm2shorts, gh_scm2longs, gh_scm2floats | |
7423 | ||
7424 | New functions. | |
7425 | ||
3e8370c3 MD |
7426 | * Changes to the scm_ interface |
7427 | ||
ad91d6c3 MD |
7428 | ** Function: scm_make_named_hook (char* name, int n_args) |
7429 | ||
7430 | Creates a hook in the same way as make-hook above but also | |
7431 | binds a variable named NAME to it. | |
7432 | ||
7433 | This is the typical way of creating a hook from C code. | |
7434 | ||
ece41168 MD |
7435 | Currently, the variable is created in the "current" module. This |
7436 | might change when we get the new module system. | |
ad91d6c3 | 7437 | |
16a5a9a4 MD |
7438 | ** The smob interface |
7439 | ||
7440 | The interface for creating smobs has changed. For documentation, see | |
7441 | data-rep.info (made from guile-core/doc/data-rep.texi). | |
7442 | ||
7443 | *** Deprecated function: SCM scm_newsmob (scm_smobfuns *) | |
7444 | ||
7445 | >>> This function will be removed in 1.3.4. <<< | |
7446 | ||
7447 | It is replaced by: | |
7448 | ||
7449 | *** Function: SCM scm_make_smob_type (const char *name, scm_sizet size) | |
7450 | This function adds a new smob type, named NAME, with instance size | |
7451 | SIZE to the system. The return value is a tag that is used in | |
7452 | creating instances of the type. If SIZE is 0, then no memory will | |
7453 | be allocated when instances of the smob are created, and nothing | |
7454 | will be freed by the default free function. | |
6c0201ad | 7455 | |
16a5a9a4 MD |
7456 | *** Function: void scm_set_smob_mark (long tc, SCM (*mark) (SCM)) |
7457 | This function sets the smob marking procedure for the smob type | |
7458 | specified by the tag TC. TC is the tag returned by | |
7459 | `scm_make_smob_type'. | |
7460 | ||
7461 | *** Function: void scm_set_smob_free (long tc, SCM (*mark) (SCM)) | |
7462 | This function sets the smob freeing procedure for the smob type | |
7463 | specified by the tag TC. TC is the tag returned by | |
7464 | `scm_make_smob_type'. | |
7465 | ||
7466 | *** Function: void scm_set_smob_print (tc, print) | |
7467 | ||
7468 | - Function: void scm_set_smob_print (long tc, | |
7469 | scm_sizet (*print) (SCM, | |
7470 | SCM, | |
7471 | scm_print_state *)) | |
7472 | ||
7473 | This function sets the smob printing procedure for the smob type | |
7474 | specified by the tag TC. TC is the tag returned by | |
7475 | `scm_make_smob_type'. | |
7476 | ||
7477 | *** Function: void scm_set_smob_equalp (long tc, SCM (*equalp) (SCM, SCM)) | |
7478 | This function sets the smob equality-testing predicate for the | |
7479 | smob type specified by the tag TC. TC is the tag returned by | |
7480 | `scm_make_smob_type'. | |
7481 | ||
7482 | *** Macro: void SCM_NEWSMOB (SCM var, long tc, void *data) | |
7483 | Make VALUE contain a smob instance of the type with type code TC and | |
7484 | smob data DATA. VALUE must be previously declared as C type `SCM'. | |
7485 | ||
7486 | *** Macro: fn_returns SCM_RETURN_NEWSMOB (long tc, void *data) | |
7487 | This macro expands to a block of code that creates a smob instance | |
7488 | of the type with type code TC and smob data DATA, and returns that | |
7489 | `SCM' value. It should be the last piece of code in a block. | |
7490 | ||
9e97c52d GH |
7491 | ** The interfaces for using I/O ports and implementing port types |
7492 | (ptobs) have changed significantly. The new interface is based on | |
7493 | shared access to buffers and a new set of ptob procedures. | |
7494 | ||
16a5a9a4 MD |
7495 | *** scm_newptob has been removed |
7496 | ||
7497 | It is replaced by: | |
7498 | ||
7499 | *** Function: SCM scm_make_port_type (type_name, fill_buffer, write_flush) | |
7500 | ||
7501 | - Function: SCM scm_make_port_type (char *type_name, | |
7502 | int (*fill_buffer) (SCM port), | |
7503 | void (*write_flush) (SCM port)); | |
7504 | ||
7505 | Similarly to the new smob interface, there is a set of function | |
7506 | setters by which the user can customize the behaviour of his port | |
544e9093 | 7507 | type. See ports.h (scm_set_port_XXX). |
16a5a9a4 | 7508 | |
9e97c52d GH |
7509 | ** scm_strport_to_string: New function: creates a new string from |
7510 | a string port's buffer. | |
7511 | ||
3e8370c3 MD |
7512 | ** Plug in interface for random number generators |
7513 | The variable `scm_the_rng' in random.c contains a value and three | |
7514 | function pointers which together define the current random number | |
7515 | generator being used by the Scheme level interface and the random | |
7516 | number library functions. | |
7517 | ||
7518 | The user is free to replace the default generator with the generator | |
7519 | of his own choice. | |
7520 | ||
7521 | *** Variable: size_t scm_the_rng.rstate_size | |
7522 | The size of the random state type used by the current RNG | |
7523 | measured in chars. | |
7524 | ||
7525 | *** Function: unsigned long scm_the_rng.random_bits (scm_rstate *STATE) | |
7526 | Given the random STATE, return 32 random bits. | |
7527 | ||
7528 | *** Function: void scm_the_rng.init_rstate (scm_rstate *STATE, chars *S, int N) | |
7529 | Seed random state STATE using string S of length N. | |
7530 | ||
7531 | *** Function: scm_rstate *scm_the_rng.copy_rstate (scm_rstate *STATE) | |
7532 | Given random state STATE, return a malloced copy. | |
7533 | ||
7534 | ** Default RNG | |
7535 | The default RNG is the MWC (Multiply With Carry) random number | |
7536 | generator described by George Marsaglia at the Department of | |
7537 | Statistics and Supercomputer Computations Research Institute, The | |
7538 | Florida State University (http://stat.fsu.edu/~geo). | |
7539 | ||
7540 | It uses 64 bits, has a period of 4578426017172946943 (4.6e18), and | |
7541 | passes all tests in the DIEHARD test suite | |
7542 | (http://stat.fsu.edu/~geo/diehard.html). The generation of 32 bits | |
7543 | costs one multiply and one add on platforms which either supports long | |
7544 | longs (gcc does this on most systems) or have 64 bit longs. The cost | |
7545 | is four multiply on other systems but this can be optimized by writing | |
7546 | scm_i_uniform32 in assembler. | |
7547 | ||
7548 | These functions are provided through the scm_the_rng interface for use | |
7549 | by libguile and the application. | |
7550 | ||
7551 | *** Function: unsigned long scm_i_uniform32 (scm_i_rstate *STATE) | |
7552 | Given the random STATE, return 32 random bits. | |
7553 | Don't use this function directly. Instead go through the plugin | |
7554 | interface (see "Plug in interface" above). | |
7555 | ||
7556 | *** Function: void scm_i_init_rstate (scm_i_rstate *STATE, char *SEED, int N) | |
7557 | Initialize STATE using SEED of length N. | |
7558 | ||
7559 | *** Function: scm_i_rstate *scm_i_copy_rstate (scm_i_rstate *STATE) | |
7560 | Return a malloc:ed copy of STATE. This function can easily be re-used | |
7561 | in the interfaces to other RNGs. | |
7562 | ||
7563 | ** Random number library functions | |
7564 | These functions use the current RNG through the scm_the_rng interface. | |
7565 | It might be a good idea to use these functions from your C code so | |
7566 | that only one random generator is used by all code in your program. | |
7567 | ||
259529f2 | 7568 | The default random state is stored in: |
3e8370c3 MD |
7569 | |
7570 | *** Variable: SCM scm_var_random_state | |
7571 | Contains the vcell of the Scheme variable "*random-state*" which is | |
7572 | used as default state by all random number functions in the Scheme | |
7573 | level interface. | |
7574 | ||
7575 | Example: | |
7576 | ||
259529f2 | 7577 | double x = scm_c_uniform01 (SCM_RSTATE (SCM_CDR (scm_var_random_state))); |
3e8370c3 | 7578 | |
259529f2 MD |
7579 | *** Function: scm_rstate *scm_c_default_rstate (void) |
7580 | This is a convenience function which returns the value of | |
7581 | scm_var_random_state. An error message is generated if this value | |
7582 | isn't a random state. | |
7583 | ||
7584 | *** Function: scm_rstate *scm_c_make_rstate (char *SEED, int LENGTH) | |
7585 | Make a new random state from the string SEED of length LENGTH. | |
7586 | ||
7587 | It is generally not a good idea to use multiple random states in a | |
7588 | program. While subsequent random numbers generated from one random | |
7589 | state are guaranteed to be reasonably independent, there is no such | |
7590 | guarantee for numbers generated from different random states. | |
7591 | ||
7592 | *** Macro: unsigned long scm_c_uniform32 (scm_rstate *STATE) | |
7593 | Return 32 random bits. | |
7594 | ||
7595 | *** Function: double scm_c_uniform01 (scm_rstate *STATE) | |
3e8370c3 MD |
7596 | Return a sample from the uniform(0,1) distribution. |
7597 | ||
259529f2 | 7598 | *** Function: double scm_c_normal01 (scm_rstate *STATE) |
3e8370c3 MD |
7599 | Return a sample from the normal(0,1) distribution. |
7600 | ||
259529f2 | 7601 | *** Function: double scm_c_exp1 (scm_rstate *STATE) |
3e8370c3 MD |
7602 | Return a sample from the exp(1) distribution. |
7603 | ||
259529f2 MD |
7604 | *** Function: unsigned long scm_c_random (scm_rstate *STATE, unsigned long M) |
7605 | Return a sample from the discrete uniform(0,M) distribution. | |
7606 | ||
7607 | *** Function: SCM scm_c_random_bignum (scm_rstate *STATE, SCM M) | |
3e8370c3 | 7608 | Return a sample from the discrete uniform(0,M) distribution. |
259529f2 | 7609 | M must be a bignum object. The returned value may be an INUM. |
3e8370c3 | 7610 | |
9e97c52d | 7611 | |
f3227c7a | 7612 | \f |
d23bbf3e | 7613 | Changes in Guile 1.3 (released Monday, October 19, 1998): |
c484bf7f JB |
7614 | |
7615 | * Changes to the distribution | |
7616 | ||
e2d6569c JB |
7617 | ** We renamed the SCHEME_LOAD_PATH environment variable to GUILE_LOAD_PATH. |
7618 | To avoid conflicts, programs should name environment variables after | |
7619 | themselves, except when there's a common practice establishing some | |
7620 | other convention. | |
7621 | ||
7622 | For now, Guile supports both GUILE_LOAD_PATH and SCHEME_LOAD_PATH, | |
7623 | giving the former precedence, and printing a warning message if the | |
7624 | latter is set. Guile 1.4 will not recognize SCHEME_LOAD_PATH at all. | |
7625 | ||
7626 | ** The header files related to multi-byte characters have been removed. | |
7627 | They were: libguile/extchrs.h and libguile/mbstrings.h. Any C code | |
7628 | which referred to these explicitly will probably need to be rewritten, | |
7629 | since the support for the variant string types has been removed; see | |
7630 | below. | |
7631 | ||
7632 | ** The header files append.h and sequences.h have been removed. These | |
7633 | files implemented non-R4RS operations which would encourage | |
7634 | non-portable programming style and less easy-to-read code. | |
3a97e020 | 7635 | |
c484bf7f JB |
7636 | * Changes to the stand-alone interpreter |
7637 | ||
2e368582 | 7638 | ** New procedures have been added to implement a "batch mode": |
ec4ab4fd | 7639 | |
2e368582 | 7640 | *** Function: batch-mode? |
ec4ab4fd GH |
7641 | |
7642 | Returns a boolean indicating whether the interpreter is in batch | |
7643 | mode. | |
7644 | ||
2e368582 | 7645 | *** Function: set-batch-mode?! ARG |
ec4ab4fd GH |
7646 | |
7647 | If ARG is true, switches the interpreter to batch mode. The `#f' | |
7648 | case has not been implemented. | |
7649 | ||
2e368582 JB |
7650 | ** Guile now provides full command-line editing, when run interactively. |
7651 | To use this feature, you must have the readline library installed. | |
7652 | The Guile build process will notice it, and automatically include | |
7653 | support for it. | |
7654 | ||
7655 | The readline library is available via anonymous FTP from any GNU | |
7656 | mirror site; the canonical location is "ftp://prep.ai.mit.edu/pub/gnu". | |
7657 | ||
a5d6d578 MD |
7658 | ** the-last-stack is now a fluid. |
7659 | ||
c484bf7f JB |
7660 | * Changes to the procedure for linking libguile with your programs |
7661 | ||
71f20534 | 7662 | ** You can now use the `guile-config' utility to build programs that use Guile. |
2e368582 | 7663 | |
2adfe1c0 | 7664 | Guile now includes a command-line utility called `guile-config', which |
71f20534 JB |
7665 | can provide information about how to compile and link programs that |
7666 | use Guile. | |
7667 | ||
7668 | *** `guile-config compile' prints any C compiler flags needed to use Guile. | |
7669 | You should include this command's output on the command line you use | |
7670 | to compile C or C++ code that #includes the Guile header files. It's | |
7671 | usually just a `-I' flag to help the compiler find the Guile headers. | |
7672 | ||
7673 | ||
7674 | *** `guile-config link' prints any linker flags necessary to link with Guile. | |
8aa5c148 | 7675 | |
71f20534 | 7676 | This command writes to its standard output a list of flags which you |
8aa5c148 JB |
7677 | must pass to the linker to link your code against the Guile library. |
7678 | The flags include '-lguile' itself, any other libraries the Guile | |
7679 | library depends upon, and any `-L' flags needed to help the linker | |
7680 | find those libraries. | |
2e368582 JB |
7681 | |
7682 | For example, here is a Makefile rule that builds a program named 'foo' | |
7683 | from the object files ${FOO_OBJECTS}, and links them against Guile: | |
7684 | ||
7685 | foo: ${FOO_OBJECTS} | |
2adfe1c0 | 7686 | ${CC} ${CFLAGS} ${FOO_OBJECTS} `guile-config link` -o foo |
2e368582 | 7687 | |
e2d6569c JB |
7688 | Previous Guile releases recommended that you use autoconf to detect |
7689 | which of a predefined set of libraries were present on your system. | |
2adfe1c0 | 7690 | It is more robust to use `guile-config', since it records exactly which |
e2d6569c JB |
7691 | libraries the installed Guile library requires. |
7692 | ||
2adfe1c0 JB |
7693 | This was originally called `build-guile', but was renamed to |
7694 | `guile-config' before Guile 1.3 was released, to be consistent with | |
7695 | the analogous script for the GTK+ GUI toolkit, which is called | |
7696 | `gtk-config'. | |
7697 | ||
2e368582 | 7698 | |
8aa5c148 JB |
7699 | ** Use the GUILE_FLAGS macro in your configure.in file to find Guile. |
7700 | ||
7701 | If you are using the GNU autoconf package to configure your program, | |
7702 | you can use the GUILE_FLAGS autoconf macro to call `guile-config' | |
7703 | (described above) and gather the necessary values for use in your | |
7704 | Makefiles. | |
7705 | ||
7706 | The GUILE_FLAGS macro expands to configure script code which runs the | |
7707 | `guile-config' script, to find out where Guile's header files and | |
7708 | libraries are installed. It sets two variables, marked for | |
7709 | substitution, as by AC_SUBST. | |
7710 | ||
7711 | GUILE_CFLAGS --- flags to pass to a C or C++ compiler to build | |
7712 | code that uses Guile header files. This is almost always just a | |
7713 | -I flag. | |
7714 | ||
7715 | GUILE_LDFLAGS --- flags to pass to the linker to link a | |
7716 | program against Guile. This includes `-lguile' for the Guile | |
7717 | library itself, any libraries that Guile itself requires (like | |
7718 | -lqthreads), and so on. It may also include a -L flag to tell the | |
7719 | compiler where to find the libraries. | |
7720 | ||
7721 | GUILE_FLAGS is defined in the file guile.m4, in the top-level | |
7722 | directory of the Guile distribution. You can copy it into your | |
7723 | package's aclocal.m4 file, and then use it in your configure.in file. | |
7724 | ||
7725 | If you are using the `aclocal' program, distributed with GNU automake, | |
7726 | to maintain your aclocal.m4 file, the Guile installation process | |
7727 | installs guile.m4 where aclocal will find it. All you need to do is | |
7728 | use GUILE_FLAGS in your configure.in file, and then run `aclocal'; | |
7729 | this will copy the definition of GUILE_FLAGS into your aclocal.m4 | |
7730 | file. | |
7731 | ||
7732 | ||
c484bf7f | 7733 | * Changes to Scheme functions and syntax |
7ad3c1e7 | 7734 | |
02755d59 | 7735 | ** Multi-byte strings have been removed, as have multi-byte and wide |
e2d6569c JB |
7736 | ports. We felt that these were the wrong approach to |
7737 | internationalization support. | |
02755d59 | 7738 | |
2e368582 JB |
7739 | ** New function: readline [PROMPT] |
7740 | Read a line from the terminal, and allow the user to edit it, | |
7741 | prompting with PROMPT. READLINE provides a large set of Emacs-like | |
7742 | editing commands, lets the user recall previously typed lines, and | |
7743 | works on almost every kind of terminal, including dumb terminals. | |
7744 | ||
7745 | READLINE assumes that the cursor is at the beginning of the line when | |
7746 | it is invoked. Thus, you can't print a prompt yourself, and then call | |
7747 | READLINE; you need to package up your prompt as a string, pass it to | |
7748 | the function, and let READLINE print the prompt itself. This is | |
7749 | because READLINE needs to know the prompt's screen width. | |
7750 | ||
8cd57bd0 JB |
7751 | For Guile to provide this function, you must have the readline |
7752 | library, version 2.1 or later, installed on your system. Readline is | |
7753 | available via anonymous FTP from prep.ai.mit.edu in pub/gnu, or from | |
7754 | any GNU mirror site. | |
2e368582 JB |
7755 | |
7756 | See also ADD-HISTORY function. | |
7757 | ||
7758 | ** New function: add-history STRING | |
7759 | Add STRING as the most recent line in the history used by the READLINE | |
7760 | command. READLINE does not add lines to the history itself; you must | |
7761 | call ADD-HISTORY to make previous input available to the user. | |
7762 | ||
8cd57bd0 JB |
7763 | ** The behavior of the read-line function has changed. |
7764 | ||
7765 | This function now uses standard C library functions to read the line, | |
7766 | for speed. This means that it doesn not respect the value of | |
7767 | scm-line-incrementors; it assumes that lines are delimited with | |
7768 | #\newline. | |
7769 | ||
7770 | (Note that this is read-line, the function that reads a line of text | |
7771 | from a port, not readline, the function that reads a line from a | |
7772 | terminal, providing full editing capabilities.) | |
7773 | ||
1a0106ef JB |
7774 | ** New module (ice-9 getopt-gnu-style): Parse command-line arguments. |
7775 | ||
7776 | This module provides some simple argument parsing. It exports one | |
7777 | function: | |
7778 | ||
7779 | Function: getopt-gnu-style ARG-LS | |
7780 | Parse a list of program arguments into an alist of option | |
7781 | descriptions. | |
7782 | ||
7783 | Each item in the list of program arguments is examined to see if | |
7784 | it meets the syntax of a GNU long-named option. An argument like | |
7785 | `--MUMBLE' produces an element of the form (MUMBLE . #t) in the | |
7786 | returned alist, where MUMBLE is a keyword object with the same | |
7787 | name as the argument. An argument like `--MUMBLE=FROB' produces | |
7788 | an element of the form (MUMBLE . FROB), where FROB is a string. | |
7789 | ||
7790 | As a special case, the returned alist also contains a pair whose | |
7791 | car is the symbol `rest'. The cdr of this pair is a list | |
7792 | containing all the items in the argument list that are not options | |
7793 | of the form mentioned above. | |
7794 | ||
7795 | The argument `--' is treated specially: all items in the argument | |
7796 | list appearing after such an argument are not examined, and are | |
7797 | returned in the special `rest' list. | |
7798 | ||
7799 | This function does not parse normal single-character switches. | |
7800 | You will need to parse them out of the `rest' list yourself. | |
7801 | ||
8cd57bd0 JB |
7802 | ** The read syntax for byte vectors and short vectors has changed. |
7803 | ||
7804 | Instead of #bytes(...), write #y(...). | |
7805 | ||
7806 | Instead of #short(...), write #h(...). | |
7807 | ||
7808 | This may seem nutty, but, like the other uniform vectors, byte vectors | |
7809 | and short vectors want to have the same print and read syntax (and, | |
7810 | more basic, want to have read syntax!). Changing the read syntax to | |
7811 | use multiple characters after the hash sign breaks with the | |
7812 | conventions used in R5RS and the conventions used for the other | |
7813 | uniform vectors. It also introduces complexity in the current reader, | |
7814 | both on the C and Scheme levels. (The Right solution is probably to | |
7815 | change the syntax and prototypes for uniform vectors entirely.) | |
7816 | ||
7817 | ||
7818 | ** The new module (ice-9 session) provides useful interactive functions. | |
7819 | ||
7820 | *** New procedure: (apropos REGEXP OPTION ...) | |
7821 | ||
7822 | Display a list of top-level variables whose names match REGEXP, and | |
7823 | the modules they are imported from. Each OPTION should be one of the | |
7824 | following symbols: | |
7825 | ||
7826 | value --- Show the value of each matching variable. | |
7827 | shadow --- Show bindings shadowed by subsequently imported modules. | |
7828 | full --- Same as both `shadow' and `value'. | |
7829 | ||
7830 | For example: | |
7831 | ||
7832 | guile> (apropos "trace" 'full) | |
7833 | debug: trace #<procedure trace args> | |
7834 | debug: untrace #<procedure untrace args> | |
7835 | the-scm-module: display-backtrace #<compiled-closure #<primitive-procedure gsubr-apply>> | |
7836 | the-scm-module: before-backtrace-hook () | |
7837 | the-scm-module: backtrace #<primitive-procedure backtrace> | |
7838 | the-scm-module: after-backtrace-hook () | |
7839 | the-scm-module: has-shown-backtrace-hint? #f | |
6c0201ad | 7840 | guile> |
8cd57bd0 JB |
7841 | |
7842 | ** There are new functions and syntax for working with macros. | |
7843 | ||
7844 | Guile implements macros as a special object type. Any variable whose | |
7845 | top-level binding is a macro object acts as a macro. The macro object | |
7846 | specifies how the expression should be transformed before evaluation. | |
7847 | ||
7848 | *** Macro objects now print in a reasonable way, resembling procedures. | |
7849 | ||
7850 | *** New function: (macro? OBJ) | |
7851 | True iff OBJ is a macro object. | |
7852 | ||
7853 | *** New function: (primitive-macro? OBJ) | |
7854 | Like (macro? OBJ), but true only if OBJ is one of the Guile primitive | |
7855 | macro transformers, implemented in eval.c rather than Scheme code. | |
7856 | ||
dbdd0c16 JB |
7857 | Why do we have this function? |
7858 | - For symmetry with procedure? and primitive-procedure?, | |
7859 | - to allow custom print procedures to tell whether a macro is | |
7860 | primitive, and display it differently, and | |
7861 | - to allow compilers and user-written evaluators to distinguish | |
7862 | builtin special forms from user-defined ones, which could be | |
7863 | compiled. | |
7864 | ||
8cd57bd0 JB |
7865 | *** New function: (macro-type OBJ) |
7866 | Return a value indicating what kind of macro OBJ is. Possible return | |
7867 | values are: | |
7868 | ||
7869 | The symbol `syntax' --- a macro created by procedure->syntax. | |
7870 | The symbol `macro' --- a macro created by procedure->macro. | |
7871 | The symbol `macro!' --- a macro created by procedure->memoizing-macro. | |
6c0201ad | 7872 | The boolean #f --- if OBJ is not a macro object. |
8cd57bd0 JB |
7873 | |
7874 | *** New function: (macro-name MACRO) | |
7875 | Return the name of the macro object MACRO's procedure, as returned by | |
7876 | procedure-name. | |
7877 | ||
7878 | *** New function: (macro-transformer MACRO) | |
7879 | Return the transformer procedure for MACRO. | |
7880 | ||
7881 | *** New syntax: (use-syntax MODULE ... TRANSFORMER) | |
7882 | ||
7883 | Specify a new macro expander to use in the current module. Each | |
7884 | MODULE is a module name, with the same meaning as in the `use-modules' | |
7885 | form; each named module's exported bindings are added to the current | |
7886 | top-level environment. TRANSFORMER is an expression evaluated in the | |
7887 | resulting environment which must yield a procedure to use as the | |
7888 | module's eval transformer: every expression evaluated in this module | |
7889 | is passed to this function, and the result passed to the Guile | |
6c0201ad | 7890 | interpreter. |
8cd57bd0 JB |
7891 | |
7892 | *** macro-eval! is removed. Use local-eval instead. | |
29521173 | 7893 | |
8d9dcb3c MV |
7894 | ** Some magic has been added to the printer to better handle user |
7895 | written printing routines (like record printers, closure printers). | |
7896 | ||
7897 | The problem is that these user written routines must have access to | |
7fbd77df | 7898 | the current `print-state' to be able to handle fancy things like |
8d9dcb3c MV |
7899 | detection of circular references. These print-states have to be |
7900 | passed to the builtin printing routines (display, write, etc) to | |
7901 | properly continue the print chain. | |
7902 | ||
7903 | We didn't want to change all existing print code so that it | |
8cd57bd0 | 7904 | explicitly passes thru a print state in addition to a port. Instead, |
8d9dcb3c MV |
7905 | we extented the possible values that the builtin printing routines |
7906 | accept as a `port'. In addition to a normal port, they now also take | |
7907 | a pair of a normal port and a print-state. Printing will go to the | |
7908 | port and the print-state will be used to control the detection of | |
7909 | circular references, etc. If the builtin function does not care for a | |
7910 | print-state, it is simply ignored. | |
7911 | ||
7912 | User written callbacks are now called with such a pair as their | |
7913 | `port', but because every function now accepts this pair as a PORT | |
7914 | argument, you don't have to worry about that. In fact, it is probably | |
7915 | safest to not check for these pairs. | |
7916 | ||
7917 | However, it is sometimes necessary to continue a print chain on a | |
7918 | different port, for example to get a intermediate string | |
7919 | representation of the printed value, mangle that string somehow, and | |
7920 | then to finally print the mangled string. Use the new function | |
7921 | ||
7922 | inherit-print-state OLD-PORT NEW-PORT | |
7923 | ||
7924 | for this. It constructs a new `port' that prints to NEW-PORT but | |
7925 | inherits the print-state of OLD-PORT. | |
7926 | ||
ef1ea498 MD |
7927 | ** struct-vtable-offset renamed to vtable-offset-user |
7928 | ||
7929 | ** New constants: vtable-index-layout, vtable-index-vtable, vtable-index-printer | |
7930 | ||
e478dffa MD |
7931 | ** There is now a third optional argument to make-vtable-vtable |
7932 | (and fourth to make-struct) when constructing new types (vtables). | |
7933 | This argument initializes field vtable-index-printer of the vtable. | |
ef1ea498 | 7934 | |
4851dc57 MV |
7935 | ** The detection of circular references has been extended to structs. |
7936 | That is, a structure that -- in the process of being printed -- prints | |
7937 | itself does not lead to infinite recursion. | |
7938 | ||
7939 | ** There is now some basic support for fluids. Please read | |
7940 | "libguile/fluid.h" to find out more. It is accessible from Scheme with | |
7941 | the following functions and macros: | |
7942 | ||
9c3fb66f MV |
7943 | Function: make-fluid |
7944 | ||
7945 | Create a new fluid object. Fluids are not special variables or | |
7946 | some other extension to the semantics of Scheme, but rather | |
7947 | ordinary Scheme objects. You can store them into variables (that | |
7948 | are still lexically scoped, of course) or into any other place you | |
7949 | like. Every fluid has a initial value of `#f'. | |
04c76b58 | 7950 | |
9c3fb66f | 7951 | Function: fluid? OBJ |
04c76b58 | 7952 | |
9c3fb66f | 7953 | Test whether OBJ is a fluid. |
04c76b58 | 7954 | |
9c3fb66f MV |
7955 | Function: fluid-ref FLUID |
7956 | Function: fluid-set! FLUID VAL | |
04c76b58 MV |
7957 | |
7958 | Access/modify the fluid FLUID. Modifications are only visible | |
7959 | within the current dynamic root (that includes threads). | |
7960 | ||
9c3fb66f MV |
7961 | Function: with-fluids* FLUIDS VALUES THUNK |
7962 | ||
7963 | FLUIDS is a list of fluids and VALUES a corresponding list of | |
7964 | values for these fluids. Before THUNK gets called the values are | |
6c0201ad | 7965 | installed in the fluids and the old values of the fluids are |
9c3fb66f MV |
7966 | saved in the VALUES list. When the flow of control leaves THUNK |
7967 | or reenters it, the values get swapped again. You might think of | |
7968 | this as a `safe-fluid-excursion'. Note that the VALUES list is | |
7969 | modified by `with-fluids*'. | |
7970 | ||
7971 | Macro: with-fluids ((FLUID VALUE) ...) FORM ... | |
7972 | ||
7973 | The same as `with-fluids*' but with a different syntax. It looks | |
7974 | just like `let', but both FLUID and VALUE are evaluated. Remember, | |
7975 | fluids are not special variables but ordinary objects. FLUID | |
7976 | should evaluate to a fluid. | |
04c76b58 | 7977 | |
e2d6569c | 7978 | ** Changes to system call interfaces: |
64d01d13 | 7979 | |
e2d6569c | 7980 | *** close-port, close-input-port and close-output-port now return a |
64d01d13 GH |
7981 | boolean instead of an `unspecified' object. #t means that the port |
7982 | was successfully closed, while #f means it was already closed. It is | |
7983 | also now possible for these procedures to raise an exception if an | |
7984 | error occurs (some errors from write can be delayed until close.) | |
7985 | ||
e2d6569c | 7986 | *** the first argument to chmod, fcntl, ftell and fseek can now be a |
6afcd3b2 GH |
7987 | file descriptor. |
7988 | ||
e2d6569c | 7989 | *** the third argument to fcntl is now optional. |
6afcd3b2 | 7990 | |
e2d6569c | 7991 | *** the first argument to chown can now be a file descriptor or a port. |
6afcd3b2 | 7992 | |
e2d6569c | 7993 | *** the argument to stat can now be a port. |
6afcd3b2 | 7994 | |
e2d6569c | 7995 | *** The following new procedures have been added (most use scsh |
64d01d13 GH |
7996 | interfaces): |
7997 | ||
e2d6569c | 7998 | *** procedure: close PORT/FD |
ec4ab4fd GH |
7999 | Similar to close-port (*note close-port: Closing Ports.), but also |
8000 | works on file descriptors. A side effect of closing a file | |
8001 | descriptor is that any ports using that file descriptor are moved | |
8002 | to a different file descriptor and have their revealed counts set | |
8003 | to zero. | |
8004 | ||
e2d6569c | 8005 | *** procedure: port->fdes PORT |
ec4ab4fd GH |
8006 | Returns the integer file descriptor underlying PORT. As a side |
8007 | effect the revealed count of PORT is incremented. | |
8008 | ||
e2d6569c | 8009 | *** procedure: fdes->ports FDES |
ec4ab4fd GH |
8010 | Returns a list of existing ports which have FDES as an underlying |
8011 | file descriptor, without changing their revealed counts. | |
8012 | ||
e2d6569c | 8013 | *** procedure: fdes->inport FDES |
ec4ab4fd GH |
8014 | Returns an existing input port which has FDES as its underlying |
8015 | file descriptor, if one exists, and increments its revealed count. | |
8016 | Otherwise, returns a new input port with a revealed count of 1. | |
8017 | ||
e2d6569c | 8018 | *** procedure: fdes->outport FDES |
ec4ab4fd GH |
8019 | Returns an existing output port which has FDES as its underlying |
8020 | file descriptor, if one exists, and increments its revealed count. | |
8021 | Otherwise, returns a new output port with a revealed count of 1. | |
8022 | ||
8023 | The next group of procedures perform a `dup2' system call, if NEWFD | |
8024 | (an integer) is supplied, otherwise a `dup'. The file descriptor to be | |
8025 | duplicated can be supplied as an integer or contained in a port. The | |
64d01d13 GH |
8026 | type of value returned varies depending on which procedure is used. |
8027 | ||
ec4ab4fd GH |
8028 | All procedures also have the side effect when performing `dup2' that |
8029 | any ports using NEWFD are moved to a different file descriptor and have | |
64d01d13 GH |
8030 | their revealed counts set to zero. |
8031 | ||
e2d6569c | 8032 | *** procedure: dup->fdes PORT/FD [NEWFD] |
ec4ab4fd | 8033 | Returns an integer file descriptor. |
64d01d13 | 8034 | |
e2d6569c | 8035 | *** procedure: dup->inport PORT/FD [NEWFD] |
ec4ab4fd | 8036 | Returns a new input port using the new file descriptor. |
64d01d13 | 8037 | |
e2d6569c | 8038 | *** procedure: dup->outport PORT/FD [NEWFD] |
ec4ab4fd | 8039 | Returns a new output port using the new file descriptor. |
64d01d13 | 8040 | |
e2d6569c | 8041 | *** procedure: dup PORT/FD [NEWFD] |
ec4ab4fd GH |
8042 | Returns a new port if PORT/FD is a port, with the same mode as the |
8043 | supplied port, otherwise returns an integer file descriptor. | |
64d01d13 | 8044 | |
e2d6569c | 8045 | *** procedure: dup->port PORT/FD MODE [NEWFD] |
ec4ab4fd GH |
8046 | Returns a new port using the new file descriptor. MODE supplies a |
8047 | mode string for the port (*note open-file: File Ports.). | |
64d01d13 | 8048 | |
e2d6569c | 8049 | *** procedure: setenv NAME VALUE |
ec4ab4fd GH |
8050 | Modifies the environment of the current process, which is also the |
8051 | default environment inherited by child processes. | |
64d01d13 | 8052 | |
ec4ab4fd GH |
8053 | If VALUE is `#f', then NAME is removed from the environment. |
8054 | Otherwise, the string NAME=VALUE is added to the environment, | |
8055 | replacing any existing string with name matching NAME. | |
64d01d13 | 8056 | |
ec4ab4fd | 8057 | The return value is unspecified. |
956055a9 | 8058 | |
e2d6569c | 8059 | *** procedure: truncate-file OBJ SIZE |
6afcd3b2 GH |
8060 | Truncates the file referred to by OBJ to at most SIZE bytes. OBJ |
8061 | can be a string containing a file name or an integer file | |
8062 | descriptor or port open for output on the file. The underlying | |
8063 | system calls are `truncate' and `ftruncate'. | |
8064 | ||
8065 | The return value is unspecified. | |
8066 | ||
e2d6569c | 8067 | *** procedure: setvbuf PORT MODE [SIZE] |
7a6f1ffa GH |
8068 | Set the buffering mode for PORT. MODE can be: |
8069 | `_IONBF' | |
8070 | non-buffered | |
8071 | ||
8072 | `_IOLBF' | |
8073 | line buffered | |
8074 | ||
8075 | `_IOFBF' | |
8076 | block buffered, using a newly allocated buffer of SIZE bytes. | |
8077 | However if SIZE is zero or unspecified, the port will be made | |
8078 | non-buffered. | |
8079 | ||
8080 | This procedure should not be used after I/O has been performed with | |
8081 | the port. | |
8082 | ||
8083 | Ports are usually block buffered by default, with a default buffer | |
8084 | size. Procedures e.g., *Note open-file: File Ports, which accept a | |
8085 | mode string allow `0' to be added to request an unbuffered port. | |
8086 | ||
e2d6569c | 8087 | *** procedure: fsync PORT/FD |
6afcd3b2 GH |
8088 | Copies any unwritten data for the specified output file descriptor |
8089 | to disk. If PORT/FD is a port, its buffer is flushed before the | |
8090 | underlying file descriptor is fsync'd. The return value is | |
8091 | unspecified. | |
8092 | ||
e2d6569c | 8093 | *** procedure: open-fdes PATH FLAGS [MODES] |
6afcd3b2 GH |
8094 | Similar to `open' but returns a file descriptor instead of a port. |
8095 | ||
e2d6569c | 8096 | *** procedure: execle PATH ENV [ARG] ... |
6afcd3b2 GH |
8097 | Similar to `execl', but the environment of the new process is |
8098 | specified by ENV, which must be a list of strings as returned by | |
8099 | the `environ' procedure. | |
8100 | ||
8101 | This procedure is currently implemented using the `execve' system | |
8102 | call, but we call it `execle' because of its Scheme calling | |
8103 | interface. | |
8104 | ||
e2d6569c | 8105 | *** procedure: strerror ERRNO |
ec4ab4fd GH |
8106 | Returns the Unix error message corresponding to ERRNO, an integer. |
8107 | ||
e2d6569c | 8108 | *** procedure: primitive-exit [STATUS] |
6afcd3b2 GH |
8109 | Terminate the current process without unwinding the Scheme stack. |
8110 | This is would typically be useful after a fork. The exit status | |
8111 | is STATUS if supplied, otherwise zero. | |
8112 | ||
e2d6569c | 8113 | *** procedure: times |
6afcd3b2 GH |
8114 | Returns an object with information about real and processor time. |
8115 | The following procedures accept such an object as an argument and | |
8116 | return a selected component: | |
8117 | ||
8118 | `tms:clock' | |
8119 | The current real time, expressed as time units relative to an | |
8120 | arbitrary base. | |
8121 | ||
8122 | `tms:utime' | |
8123 | The CPU time units used by the calling process. | |
8124 | ||
8125 | `tms:stime' | |
8126 | The CPU time units used by the system on behalf of the | |
8127 | calling process. | |
8128 | ||
8129 | `tms:cutime' | |
8130 | The CPU time units used by terminated child processes of the | |
8131 | calling process, whose status has been collected (e.g., using | |
8132 | `waitpid'). | |
8133 | ||
8134 | `tms:cstime' | |
8135 | Similarly, the CPU times units used by the system on behalf of | |
8136 | terminated child processes. | |
7ad3c1e7 | 8137 | |
e2d6569c JB |
8138 | ** Removed: list-length |
8139 | ** Removed: list-append, list-append! | |
8140 | ** Removed: list-reverse, list-reverse! | |
8141 | ||
8142 | ** array-map renamed to array-map! | |
8143 | ||
8144 | ** serial-array-map renamed to serial-array-map! | |
8145 | ||
660f41fa MD |
8146 | ** catch doesn't take #f as first argument any longer |
8147 | ||
8148 | Previously, it was possible to pass #f instead of a key to `catch'. | |
8149 | That would cause `catch' to pass a jump buffer object to the procedure | |
8150 | passed as second argument. The procedure could then use this jump | |
8151 | buffer objekt as an argument to throw. | |
8152 | ||
8153 | This mechanism has been removed since its utility doesn't motivate the | |
8154 | extra complexity it introduces. | |
8155 | ||
332d00f6 JB |
8156 | ** The `#/' notation for lists now provokes a warning message from Guile. |
8157 | This syntax will be removed from Guile in the near future. | |
8158 | ||
8159 | To disable the warning message, set the GUILE_HUSH environment | |
8160 | variable to any non-empty value. | |
8161 | ||
8cd57bd0 JB |
8162 | ** The newline character now prints as `#\newline', following the |
8163 | normal Scheme notation, not `#\nl'. | |
8164 | ||
c484bf7f JB |
8165 | * Changes to the gh_ interface |
8166 | ||
8986901b JB |
8167 | ** The gh_enter function now takes care of loading the Guile startup files. |
8168 | gh_enter works by calling scm_boot_guile; see the remarks below. | |
8169 | ||
5424b4f7 MD |
8170 | ** Function: void gh_write (SCM x) |
8171 | ||
8172 | Write the printed representation of the scheme object x to the current | |
8173 | output port. Corresponds to the scheme level `write'. | |
8174 | ||
3a97e020 MD |
8175 | ** gh_list_length renamed to gh_length. |
8176 | ||
8d6787b6 MG |
8177 | ** vector handling routines |
8178 | ||
8179 | Several major changes. In particular, gh_vector() now resembles | |
8180 | (vector ...) (with a caveat -- see manual), and gh_make_vector() now | |
956328d2 MG |
8181 | exists and behaves like (make-vector ...). gh_vset() and gh_vref() |
8182 | have been renamed gh_vector_set_x() and gh_vector_ref(). Some missing | |
8d6787b6 MG |
8183 | vector-related gh_ functions have been implemented. |
8184 | ||
7fee59bd MG |
8185 | ** pair and list routines |
8186 | ||
8187 | Implemented several of the R4RS pair and list functions that were | |
8188 | missing. | |
8189 | ||
171422a9 MD |
8190 | ** gh_scm2doubles, gh_doubles2scm, gh_doubles2dvect |
8191 | ||
8192 | New function. Converts double arrays back and forth between Scheme | |
8193 | and C. | |
8194 | ||
c484bf7f JB |
8195 | * Changes to the scm_ interface |
8196 | ||
8986901b JB |
8197 | ** The function scm_boot_guile now takes care of loading the startup files. |
8198 | ||
8199 | Guile's primary initialization function, scm_boot_guile, now takes | |
8200 | care of loading `boot-9.scm', in the `ice-9' module, to initialize | |
8201 | Guile, define the module system, and put together some standard | |
8202 | bindings. It also loads `init.scm', which is intended to hold | |
8203 | site-specific initialization code. | |
8204 | ||
8205 | Since Guile cannot operate properly until boot-9.scm is loaded, there | |
8206 | is no reason to separate loading boot-9.scm from Guile's other | |
8207 | initialization processes. | |
8208 | ||
8209 | This job used to be done by scm_compile_shell_switches, which didn't | |
8210 | make much sense; in particular, it meant that people using Guile for | |
8211 | non-shell-like applications had to jump through hoops to get Guile | |
8212 | initialized properly. | |
8213 | ||
8214 | ** The function scm_compile_shell_switches no longer loads the startup files. | |
8215 | Now, Guile always loads the startup files, whenever it is initialized; | |
8216 | see the notes above for scm_boot_guile and scm_load_startup_files. | |
8217 | ||
8218 | ** Function: scm_load_startup_files | |
8219 | This new function takes care of loading Guile's initialization file | |
8220 | (`boot-9.scm'), and the site initialization file, `init.scm'. Since | |
8221 | this is always called by the Guile initialization process, it's | |
8222 | probably not too useful to call this yourself, but it's there anyway. | |
8223 | ||
87148d9e JB |
8224 | ** The semantics of smob marking have changed slightly. |
8225 | ||
8226 | The smob marking function (the `mark' member of the scm_smobfuns | |
8227 | structure) is no longer responsible for setting the mark bit on the | |
8228 | smob. The generic smob handling code in the garbage collector will | |
8229 | set this bit. The mark function need only ensure that any other | |
8230 | objects the smob refers to get marked. | |
8231 | ||
8232 | Note that this change means that the smob's GC8MARK bit is typically | |
8233 | already set upon entry to the mark function. Thus, marking functions | |
8234 | which look like this: | |
8235 | ||
8236 | { | |
8237 | if (SCM_GC8MARKP (ptr)) | |
8238 | return SCM_BOOL_F; | |
8239 | SCM_SETGC8MARK (ptr); | |
8240 | ... mark objects to which the smob refers ... | |
8241 | } | |
8242 | ||
8243 | are now incorrect, since they will return early, and fail to mark any | |
8244 | other objects the smob refers to. Some code in the Guile library used | |
8245 | to work this way. | |
8246 | ||
1cf84ea5 JB |
8247 | ** The semantics of the I/O port functions in scm_ptobfuns have changed. |
8248 | ||
8249 | If you have implemented your own I/O port type, by writing the | |
8250 | functions required by the scm_ptobfuns and then calling scm_newptob, | |
8251 | you will need to change your functions slightly. | |
8252 | ||
8253 | The functions in a scm_ptobfuns structure now expect the port itself | |
8254 | as their argument; they used to expect the `stream' member of the | |
8255 | port's scm_port_table structure. This allows functions in an | |
8256 | scm_ptobfuns structure to easily access the port's cell (and any flags | |
8257 | it its CAR), and the port's scm_port_table structure. | |
8258 | ||
8259 | Guile now passes the I/O port itself as the `port' argument in the | |
8260 | following scm_ptobfuns functions: | |
8261 | ||
8262 | int (*free) (SCM port); | |
8263 | int (*fputc) (int, SCM port); | |
8264 | int (*fputs) (char *, SCM port); | |
8265 | scm_sizet (*fwrite) SCM_P ((char *ptr, | |
8266 | scm_sizet size, | |
8267 | scm_sizet nitems, | |
8268 | SCM port)); | |
8269 | int (*fflush) (SCM port); | |
8270 | int (*fgetc) (SCM port); | |
8271 | int (*fclose) (SCM port); | |
8272 | ||
8273 | The interfaces to the `mark', `print', `equalp', and `fgets' methods | |
8274 | are unchanged. | |
8275 | ||
8276 | If you have existing code which defines its own port types, it is easy | |
8277 | to convert your code to the new interface; simply apply SCM_STREAM to | |
8278 | the port argument to yield the value you code used to expect. | |
8279 | ||
8280 | Note that since both the port and the stream have the same type in the | |
8281 | C code --- they are both SCM values --- the C compiler will not remind | |
8282 | you if you forget to update your scm_ptobfuns functions. | |
8283 | ||
8284 | ||
933a7411 MD |
8285 | ** Function: int scm_internal_select (int fds, |
8286 | SELECT_TYPE *rfds, | |
8287 | SELECT_TYPE *wfds, | |
8288 | SELECT_TYPE *efds, | |
8289 | struct timeval *timeout); | |
8290 | ||
8291 | This is a replacement for the `select' function provided by the OS. | |
8292 | It enables I/O blocking and sleeping to happen for one cooperative | |
8293 | thread without blocking other threads. It also avoids busy-loops in | |
8294 | these situations. It is intended that all I/O blocking and sleeping | |
8295 | will finally go through this function. Currently, this function is | |
8296 | only available on systems providing `gettimeofday' and `select'. | |
8297 | ||
5424b4f7 MD |
8298 | ** Function: SCM scm_internal_stack_catch (SCM tag, |
8299 | scm_catch_body_t body, | |
8300 | void *body_data, | |
8301 | scm_catch_handler_t handler, | |
8302 | void *handler_data) | |
8303 | ||
8304 | A new sibling to the other two C level `catch' functions | |
8305 | scm_internal_catch and scm_internal_lazy_catch. Use it if you want | |
8306 | the stack to be saved automatically into the variable `the-last-stack' | |
8307 | (scm_the_last_stack_var) on error. This is necessary if you want to | |
8308 | use advanced error reporting, such as calling scm_display_error and | |
8309 | scm_display_backtrace. (They both take a stack object as argument.) | |
8310 | ||
df366c26 MD |
8311 | ** Function: SCM scm_spawn_thread (scm_catch_body_t body, |
8312 | void *body_data, | |
8313 | scm_catch_handler_t handler, | |
8314 | void *handler_data) | |
8315 | ||
8316 | Spawns a new thread. It does a job similar to | |
8317 | scm_call_with_new_thread but takes arguments more suitable when | |
8318 | spawning threads from application C code. | |
8319 | ||
88482b31 MD |
8320 | ** The hook scm_error_callback has been removed. It was originally |
8321 | intended as a way for the user to install his own error handler. But | |
8322 | that method works badly since it intervenes between throw and catch, | |
8323 | thereby changing the semantics of expressions like (catch #t ...). | |
8324 | The correct way to do it is to use one of the C level catch functions | |
8325 | in throw.c: scm_internal_catch/lazy_catch/stack_catch. | |
8326 | ||
3a97e020 MD |
8327 | ** Removed functions: |
8328 | ||
8329 | scm_obj_length, scm_list_length, scm_list_append, scm_list_append_x, | |
8330 | scm_list_reverse, scm_list_reverse_x | |
8331 | ||
8332 | ** New macros: SCM_LISTn where n is one of the integers 0-9. | |
8333 | ||
8334 | These can be used for pretty list creation from C. The idea is taken | |
8335 | from Erick Gallesio's STk. | |
8336 | ||
298aa6e3 MD |
8337 | ** scm_array_map renamed to scm_array_map_x |
8338 | ||
527da704 MD |
8339 | ** mbstrings are now removed |
8340 | ||
8341 | This means that the type codes scm_tc7_mb_string and | |
8342 | scm_tc7_mb_substring has been removed. | |
8343 | ||
8cd57bd0 JB |
8344 | ** scm_gen_putc, scm_gen_puts, scm_gen_write, and scm_gen_getc have changed. |
8345 | ||
8346 | Since we no longer support multi-byte strings, these I/O functions | |
8347 | have been simplified, and renamed. Here are their old names, and | |
8348 | their new names and arguments: | |
8349 | ||
8350 | scm_gen_putc -> void scm_putc (int c, SCM port); | |
8351 | scm_gen_puts -> void scm_puts (char *s, SCM port); | |
8352 | scm_gen_write -> void scm_lfwrite (char *ptr, scm_sizet size, SCM port); | |
8353 | scm_gen_getc -> void scm_getc (SCM port); | |
8354 | ||
8355 | ||
527da704 MD |
8356 | ** The macros SCM_TYP7D and SCM_TYP7SD has been removed. |
8357 | ||
8358 | ** The macro SCM_TYP7S has taken the role of the old SCM_TYP7D | |
8359 | ||
8360 | SCM_TYP7S now masks away the bit which distinguishes substrings from | |
8361 | strings. | |
8362 | ||
660f41fa MD |
8363 | ** scm_catch_body_t: Backward incompatible change! |
8364 | ||
8365 | Body functions to scm_internal_catch and friends do not any longer | |
8366 | take a second argument. This is because it is no longer possible to | |
8367 | pass a #f arg to catch. | |
8368 | ||
a8e05009 JB |
8369 | ** Calls to scm_protect_object and scm_unprotect now nest properly. |
8370 | ||
8371 | The function scm_protect_object protects its argument from being freed | |
8372 | by the garbage collector. scm_unprotect_object removes that | |
8373 | protection. | |
8374 | ||
8375 | These functions now nest properly. That is, for every object O, there | |
8376 | is a counter which scm_protect_object(O) increments and | |
8377 | scm_unprotect_object(O) decrements, if the counter is greater than | |
8378 | zero. Every object's counter is zero when it is first created. If an | |
8379 | object's counter is greater than zero, the garbage collector will not | |
8380 | reclaim its storage. | |
8381 | ||
8382 | This allows you to use scm_protect_object in your code without | |
8383 | worrying that some other function you call will call | |
8384 | scm_unprotect_object, and allow it to be freed. Assuming that the | |
8385 | functions you call are well-behaved, and unprotect only those objects | |
8386 | they protect, you can follow the same rule and have confidence that | |
8387 | objects will be freed only at appropriate times. | |
8388 | ||
c484bf7f JB |
8389 | \f |
8390 | Changes in Guile 1.2 (released Tuesday, June 24 1997): | |
cf78e9e8 | 8391 | |
737c9113 JB |
8392 | * Changes to the distribution |
8393 | ||
832b09ed JB |
8394 | ** Nightly snapshots are now available from ftp.red-bean.com. |
8395 | The old server, ftp.cyclic.com, has been relinquished to its rightful | |
8396 | owner. | |
8397 | ||
8398 | Nightly snapshots of the Guile development sources are now available via | |
8399 | anonymous FTP from ftp.red-bean.com, as /pub/guile/guile-snap.tar.gz. | |
8400 | ||
8401 | Via the web, that's: ftp://ftp.red-bean.com/pub/guile/guile-snap.tar.gz | |
8402 | For getit, that's: ftp.red-bean.com:/pub/guile/guile-snap.tar.gz | |
8403 | ||
0fcab5ed JB |
8404 | ** To run Guile without installing it, the procedure has changed a bit. |
8405 | ||
8406 | If you used a separate build directory to compile Guile, you'll need | |
8407 | to include the build directory in SCHEME_LOAD_PATH, as well as the | |
8408 | source directory. See the `INSTALL' file for examples. | |
8409 | ||
737c9113 JB |
8410 | * Changes to the procedure for linking libguile with your programs |
8411 | ||
94982a4e JB |
8412 | ** The standard Guile load path for Scheme code now includes |
8413 | $(datadir)/guile (usually /usr/local/share/guile). This means that | |
8414 | you can install your own Scheme files there, and Guile will find them. | |
8415 | (Previous versions of Guile only checked a directory whose name | |
8416 | contained the Guile version number, so you had to re-install or move | |
8417 | your Scheme sources each time you installed a fresh version of Guile.) | |
8418 | ||
8419 | The load path also includes $(datadir)/guile/site; we recommend | |
8420 | putting individual Scheme files there. If you want to install a | |
8421 | package with multiple source files, create a directory for them under | |
8422 | $(datadir)/guile. | |
8423 | ||
8424 | ** Guile 1.2 will now use the Rx regular expression library, if it is | |
8425 | installed on your system. When you are linking libguile into your own | |
8426 | programs, this means you will have to link against -lguile, -lqt (if | |
8427 | you configured Guile with thread support), and -lrx. | |
27590f82 JB |
8428 | |
8429 | If you are using autoconf to generate configuration scripts for your | |
8430 | application, the following lines should suffice to add the appropriate | |
8431 | libraries to your link command: | |
8432 | ||
8433 | ### Find Rx, quickthreads and libguile. | |
8434 | AC_CHECK_LIB(rx, main) | |
8435 | AC_CHECK_LIB(qt, main) | |
8436 | AC_CHECK_LIB(guile, scm_shell) | |
8437 | ||
94982a4e JB |
8438 | The Guile 1.2 distribution does not contain sources for the Rx |
8439 | library, as Guile 1.0 did. If you want to use Rx, you'll need to | |
8440 | retrieve it from a GNU FTP site and install it separately. | |
8441 | ||
b83b8bee JB |
8442 | * Changes to Scheme functions and syntax |
8443 | ||
e035e7e6 MV |
8444 | ** The dynamic linking features of Guile are now enabled by default. |
8445 | You can disable them by giving the `--disable-dynamic-linking' option | |
8446 | to configure. | |
8447 | ||
e035e7e6 MV |
8448 | (dynamic-link FILENAME) |
8449 | ||
8450 | Find the object file denoted by FILENAME (a string) and link it | |
8451 | into the running Guile application. When everything works out, | |
8452 | return a Scheme object suitable for representing the linked object | |
8453 | file. Otherwise an error is thrown. How object files are | |
8454 | searched is system dependent. | |
8455 | ||
8456 | (dynamic-object? VAL) | |
8457 | ||
8458 | Determine whether VAL represents a dynamically linked object file. | |
8459 | ||
8460 | (dynamic-unlink DYNOBJ) | |
8461 | ||
8462 | Unlink the indicated object file from the application. DYNOBJ | |
8463 | should be one of the values returned by `dynamic-link'. | |
8464 | ||
8465 | (dynamic-func FUNCTION DYNOBJ) | |
8466 | ||
8467 | Search the C function indicated by FUNCTION (a string or symbol) | |
8468 | in DYNOBJ and return some Scheme object that can later be used | |
8469 | with `dynamic-call' to actually call this function. Right now, | |
8470 | these Scheme objects are formed by casting the address of the | |
8471 | function to `long' and converting this number to its Scheme | |
8472 | representation. | |
8473 | ||
8474 | (dynamic-call FUNCTION DYNOBJ) | |
8475 | ||
8476 | Call the C function indicated by FUNCTION and DYNOBJ. The | |
8477 | function is passed no arguments and its return value is ignored. | |
8478 | When FUNCTION is something returned by `dynamic-func', call that | |
8479 | function and ignore DYNOBJ. When FUNCTION is a string (or symbol, | |
8480 | etc.), look it up in DYNOBJ; this is equivalent to | |
8481 | ||
8482 | (dynamic-call (dynamic-func FUNCTION DYNOBJ) #f) | |
8483 | ||
8484 | Interrupts are deferred while the C function is executing (with | |
8485 | SCM_DEFER_INTS/SCM_ALLOW_INTS). | |
8486 | ||
8487 | (dynamic-args-call FUNCTION DYNOBJ ARGS) | |
8488 | ||
8489 | Call the C function indicated by FUNCTION and DYNOBJ, but pass it | |
8490 | some arguments and return its return value. The C function is | |
8491 | expected to take two arguments and return an `int', just like | |
8492 | `main': | |
8493 | ||
8494 | int c_func (int argc, char **argv); | |
8495 | ||
8496 | ARGS must be a list of strings and is converted into an array of | |
8497 | `char *'. The array is passed in ARGV and its size in ARGC. The | |
8498 | return value is converted to a Scheme number and returned from the | |
8499 | call to `dynamic-args-call'. | |
8500 | ||
0fcab5ed JB |
8501 | When dynamic linking is disabled or not supported on your system, |
8502 | the above functions throw errors, but they are still available. | |
8503 | ||
e035e7e6 MV |
8504 | Here is a small example that works on GNU/Linux: |
8505 | ||
8506 | (define libc-obj (dynamic-link "libc.so")) | |
8507 | (dynamic-args-call 'rand libc-obj '()) | |
8508 | ||
8509 | See the file `libguile/DYNAMIC-LINKING' for additional comments. | |
8510 | ||
27590f82 | 8511 | ** The #/ syntax for module names is depreciated, and will be removed |
6c0201ad | 8512 | in a future version of Guile. Instead of |
27590f82 JB |
8513 | |
8514 | #/foo/bar/baz | |
8515 | ||
8516 | instead write | |
8517 | ||
8518 | (foo bar baz) | |
8519 | ||
8520 | The latter syntax is more consistent with existing Lisp practice. | |
8521 | ||
5dade857 MV |
8522 | ** Guile now does fancier printing of structures. Structures are the |
8523 | underlying implementation for records, which in turn are used to | |
8524 | implement modules, so all of these object now print differently and in | |
8525 | a more informative way. | |
8526 | ||
161029df JB |
8527 | The Scheme printer will examine the builtin variable *struct-printer* |
8528 | whenever it needs to print a structure object. When this variable is | |
8529 | not `#f' it is deemed to be a procedure and will be applied to the | |
8530 | structure object and the output port. When *struct-printer* is `#f' | |
8531 | or the procedure return `#f' the structure object will be printed in | |
8532 | the boring #<struct 80458270> form. | |
5dade857 MV |
8533 | |
8534 | This hook is used by some routines in ice-9/boot-9.scm to implement | |
8535 | type specific printing routines. Please read the comments there about | |
8536 | "printing structs". | |
8537 | ||
8538 | One of the more specific uses of structs are records. The printing | |
8539 | procedure that could be passed to MAKE-RECORD-TYPE is now actually | |
8540 | called. It should behave like a *struct-printer* procedure (described | |
8541 | above). | |
8542 | ||
b83b8bee JB |
8543 | ** Guile now supports a new R4RS-compliant syntax for keywords. A |
8544 | token of the form #:NAME, where NAME has the same syntax as a Scheme | |
8545 | symbol, is the external representation of the keyword named NAME. | |
8546 | Keyword objects print using this syntax as well, so values containing | |
1e5afba0 JB |
8547 | keyword objects can be read back into Guile. When used in an |
8548 | expression, keywords are self-quoting objects. | |
b83b8bee JB |
8549 | |
8550 | Guile suports this read syntax, and uses this print syntax, regardless | |
8551 | of the current setting of the `keyword' read option. The `keyword' | |
8552 | read option only controls whether Guile recognizes the `:NAME' syntax, | |
8553 | which is incompatible with R4RS. (R4RS says such token represent | |
8554 | symbols.) | |
737c9113 JB |
8555 | |
8556 | ** Guile has regular expression support again. Guile 1.0 included | |
8557 | functions for matching regular expressions, based on the Rx library. | |
8558 | In Guile 1.1, the Guile/Rx interface was removed to simplify the | |
8559 | distribution, and thus Guile had no regular expression support. Guile | |
94982a4e JB |
8560 | 1.2 again supports the most commonly used functions, and supports all |
8561 | of SCSH's regular expression functions. | |
2409cdfa | 8562 | |
94982a4e JB |
8563 | If your system does not include a POSIX regular expression library, |
8564 | and you have not linked Guile with a third-party regexp library such as | |
8565 | Rx, these functions will not be available. You can tell whether your | |
8566 | Guile installation includes regular expression support by checking | |
8567 | whether the `*features*' list includes the `regex' symbol. | |
737c9113 | 8568 | |
94982a4e | 8569 | *** regexp functions |
161029df | 8570 | |
94982a4e JB |
8571 | By default, Guile supports POSIX extended regular expressions. That |
8572 | means that the characters `(', `)', `+' and `?' are special, and must | |
8573 | be escaped if you wish to match the literal characters. | |
e1a191a8 | 8574 | |
94982a4e JB |
8575 | This regular expression interface was modeled after that implemented |
8576 | by SCSH, the Scheme Shell. It is intended to be upwardly compatible | |
8577 | with SCSH regular expressions. | |
8578 | ||
8579 | **** Function: string-match PATTERN STR [START] | |
8580 | Compile the string PATTERN into a regular expression and compare | |
8581 | it with STR. The optional numeric argument START specifies the | |
8582 | position of STR at which to begin matching. | |
8583 | ||
8584 | `string-match' returns a "match structure" which describes what, | |
8585 | if anything, was matched by the regular expression. *Note Match | |
8586 | Structures::. If STR does not match PATTERN at all, | |
8587 | `string-match' returns `#f'. | |
8588 | ||
8589 | Each time `string-match' is called, it must compile its PATTERN | |
8590 | argument into a regular expression structure. This operation is | |
8591 | expensive, which makes `string-match' inefficient if the same regular | |
8592 | expression is used several times (for example, in a loop). For better | |
8593 | performance, you can compile a regular expression in advance and then | |
8594 | match strings against the compiled regexp. | |
8595 | ||
8596 | **** Function: make-regexp STR [FLAGS] | |
8597 | Compile the regular expression described by STR, and return the | |
8598 | compiled regexp structure. If STR does not describe a legal | |
8599 | regular expression, `make-regexp' throws a | |
8600 | `regular-expression-syntax' error. | |
8601 | ||
8602 | FLAGS may be the bitwise-or of one or more of the following: | |
8603 | ||
8604 | **** Constant: regexp/extended | |
8605 | Use POSIX Extended Regular Expression syntax when interpreting | |
8606 | STR. If not set, POSIX Basic Regular Expression syntax is used. | |
8607 | If the FLAGS argument is omitted, we assume regexp/extended. | |
8608 | ||
8609 | **** Constant: regexp/icase | |
8610 | Do not differentiate case. Subsequent searches using the | |
8611 | returned regular expression will be case insensitive. | |
8612 | ||
8613 | **** Constant: regexp/newline | |
8614 | Match-any-character operators don't match a newline. | |
8615 | ||
8616 | A non-matching list ([^...]) not containing a newline matches a | |
8617 | newline. | |
8618 | ||
8619 | Match-beginning-of-line operator (^) matches the empty string | |
8620 | immediately after a newline, regardless of whether the FLAGS | |
8621 | passed to regexp-exec contain regexp/notbol. | |
8622 | ||
8623 | Match-end-of-line operator ($) matches the empty string | |
8624 | immediately before a newline, regardless of whether the FLAGS | |
8625 | passed to regexp-exec contain regexp/noteol. | |
8626 | ||
8627 | **** Function: regexp-exec REGEXP STR [START [FLAGS]] | |
8628 | Match the compiled regular expression REGEXP against `str'. If | |
8629 | the optional integer START argument is provided, begin matching | |
8630 | from that position in the string. Return a match structure | |
8631 | describing the results of the match, or `#f' if no match could be | |
8632 | found. | |
8633 | ||
8634 | FLAGS may be the bitwise-or of one or more of the following: | |
8635 | ||
8636 | **** Constant: regexp/notbol | |
8637 | The match-beginning-of-line operator always fails to match (but | |
8638 | see the compilation flag regexp/newline above) This flag may be | |
8639 | used when different portions of a string are passed to | |
8640 | regexp-exec and the beginning of the string should not be | |
8641 | interpreted as the beginning of the line. | |
8642 | ||
8643 | **** Constant: regexp/noteol | |
8644 | The match-end-of-line operator always fails to match (but see the | |
8645 | compilation flag regexp/newline above) | |
8646 | ||
8647 | **** Function: regexp? OBJ | |
8648 | Return `#t' if OBJ is a compiled regular expression, or `#f' | |
8649 | otherwise. | |
8650 | ||
8651 | Regular expressions are commonly used to find patterns in one string | |
8652 | and replace them with the contents of another string. | |
8653 | ||
8654 | **** Function: regexp-substitute PORT MATCH [ITEM...] | |
8655 | Write to the output port PORT selected contents of the match | |
8656 | structure MATCH. Each ITEM specifies what should be written, and | |
8657 | may be one of the following arguments: | |
8658 | ||
8659 | * A string. String arguments are written out verbatim. | |
8660 | ||
8661 | * An integer. The submatch with that number is written. | |
8662 | ||
8663 | * The symbol `pre'. The portion of the matched string preceding | |
8664 | the regexp match is written. | |
8665 | ||
8666 | * The symbol `post'. The portion of the matched string | |
8667 | following the regexp match is written. | |
8668 | ||
8669 | PORT may be `#f', in which case nothing is written; instead, | |
8670 | `regexp-substitute' constructs a string from the specified ITEMs | |
8671 | and returns that. | |
8672 | ||
8673 | **** Function: regexp-substitute/global PORT REGEXP TARGET [ITEM...] | |
8674 | Similar to `regexp-substitute', but can be used to perform global | |
8675 | substitutions on STR. Instead of taking a match structure as an | |
8676 | argument, `regexp-substitute/global' takes two string arguments: a | |
8677 | REGEXP string describing a regular expression, and a TARGET string | |
8678 | which should be matched against this regular expression. | |
8679 | ||
8680 | Each ITEM behaves as in REGEXP-SUBSTITUTE, with the following | |
8681 | exceptions: | |
8682 | ||
8683 | * A function may be supplied. When this function is called, it | |
8684 | will be passed one argument: a match structure for a given | |
8685 | regular expression match. It should return a string to be | |
8686 | written out to PORT. | |
8687 | ||
8688 | * The `post' symbol causes `regexp-substitute/global' to recurse | |
8689 | on the unmatched portion of STR. This *must* be supplied in | |
8690 | order to perform global search-and-replace on STR; if it is | |
8691 | not present among the ITEMs, then `regexp-substitute/global' | |
8692 | will return after processing a single match. | |
8693 | ||
8694 | *** Match Structures | |
8695 | ||
8696 | A "match structure" is the object returned by `string-match' and | |
8697 | `regexp-exec'. It describes which portion of a string, if any, matched | |
8698 | the given regular expression. Match structures include: a reference to | |
8699 | the string that was checked for matches; the starting and ending | |
8700 | positions of the regexp match; and, if the regexp included any | |
8701 | parenthesized subexpressions, the starting and ending positions of each | |
8702 | submatch. | |
8703 | ||
8704 | In each of the regexp match functions described below, the `match' | |
8705 | argument must be a match structure returned by a previous call to | |
8706 | `string-match' or `regexp-exec'. Most of these functions return some | |
8707 | information about the original target string that was matched against a | |
8708 | regular expression; we will call that string TARGET for easy reference. | |
8709 | ||
8710 | **** Function: regexp-match? OBJ | |
8711 | Return `#t' if OBJ is a match structure returned by a previous | |
8712 | call to `regexp-exec', or `#f' otherwise. | |
8713 | ||
8714 | **** Function: match:substring MATCH [N] | |
8715 | Return the portion of TARGET matched by subexpression number N. | |
8716 | Submatch 0 (the default) represents the entire regexp match. If | |
8717 | the regular expression as a whole matched, but the subexpression | |
8718 | number N did not match, return `#f'. | |
8719 | ||
8720 | **** Function: match:start MATCH [N] | |
8721 | Return the starting position of submatch number N. | |
8722 | ||
8723 | **** Function: match:end MATCH [N] | |
8724 | Return the ending position of submatch number N. | |
8725 | ||
8726 | **** Function: match:prefix MATCH | |
8727 | Return the unmatched portion of TARGET preceding the regexp match. | |
8728 | ||
8729 | **** Function: match:suffix MATCH | |
8730 | Return the unmatched portion of TARGET following the regexp match. | |
8731 | ||
8732 | **** Function: match:count MATCH | |
8733 | Return the number of parenthesized subexpressions from MATCH. | |
8734 | Note that the entire regular expression match itself counts as a | |
8735 | subexpression, and failed submatches are included in the count. | |
8736 | ||
8737 | **** Function: match:string MATCH | |
8738 | Return the original TARGET string. | |
8739 | ||
8740 | *** Backslash Escapes | |
8741 | ||
8742 | Sometimes you will want a regexp to match characters like `*' or `$' | |
8743 | exactly. For example, to check whether a particular string represents | |
8744 | a menu entry from an Info node, it would be useful to match it against | |
8745 | a regexp like `^* [^:]*::'. However, this won't work; because the | |
8746 | asterisk is a metacharacter, it won't match the `*' at the beginning of | |
8747 | the string. In this case, we want to make the first asterisk un-magic. | |
8748 | ||
8749 | You can do this by preceding the metacharacter with a backslash | |
8750 | character `\'. (This is also called "quoting" the metacharacter, and | |
8751 | is known as a "backslash escape".) When Guile sees a backslash in a | |
8752 | regular expression, it considers the following glyph to be an ordinary | |
8753 | character, no matter what special meaning it would ordinarily have. | |
8754 | Therefore, we can make the above example work by changing the regexp to | |
8755 | `^\* [^:]*::'. The `\*' sequence tells the regular expression engine | |
8756 | to match only a single asterisk in the target string. | |
8757 | ||
8758 | Since the backslash is itself a metacharacter, you may force a | |
8759 | regexp to match a backslash in the target string by preceding the | |
8760 | backslash with itself. For example, to find variable references in a | |
8761 | TeX program, you might want to find occurrences of the string `\let\' | |
8762 | followed by any number of alphabetic characters. The regular expression | |
8763 | `\\let\\[A-Za-z]*' would do this: the double backslashes in the regexp | |
8764 | each match a single backslash in the target string. | |
8765 | ||
8766 | **** Function: regexp-quote STR | |
8767 | Quote each special character found in STR with a backslash, and | |
8768 | return the resulting string. | |
8769 | ||
8770 | *Very important:* Using backslash escapes in Guile source code (as | |
8771 | in Emacs Lisp or C) can be tricky, because the backslash character has | |
8772 | special meaning for the Guile reader. For example, if Guile encounters | |
8773 | the character sequence `\n' in the middle of a string while processing | |
8774 | Scheme code, it replaces those characters with a newline character. | |
8775 | Similarly, the character sequence `\t' is replaced by a horizontal tab. | |
8776 | Several of these "escape sequences" are processed by the Guile reader | |
8777 | before your code is executed. Unrecognized escape sequences are | |
8778 | ignored: if the characters `\*' appear in a string, they will be | |
8779 | translated to the single character `*'. | |
8780 | ||
8781 | This translation is obviously undesirable for regular expressions, | |
8782 | since we want to be able to include backslashes in a string in order to | |
8783 | escape regexp metacharacters. Therefore, to make sure that a backslash | |
8784 | is preserved in a string in your Guile program, you must use *two* | |
8785 | consecutive backslashes: | |
8786 | ||
8787 | (define Info-menu-entry-pattern (make-regexp "^\\* [^:]*")) | |
8788 | ||
8789 | The string in this example is preprocessed by the Guile reader before | |
8790 | any code is executed. The resulting argument to `make-regexp' is the | |
8791 | string `^\* [^:]*', which is what we really want. | |
8792 | ||
8793 | This also means that in order to write a regular expression that | |
8794 | matches a single backslash character, the regular expression string in | |
8795 | the source code must include *four* backslashes. Each consecutive pair | |
8796 | of backslashes gets translated by the Guile reader to a single | |
8797 | backslash, and the resulting double-backslash is interpreted by the | |
8798 | regexp engine as matching a single backslash character. Hence: | |
8799 | ||
8800 | (define tex-variable-pattern (make-regexp "\\\\let\\\\=[A-Za-z]*")) | |
8801 | ||
8802 | The reason for the unwieldiness of this syntax is historical. Both | |
8803 | regular expression pattern matchers and Unix string processing systems | |
8804 | have traditionally used backslashes with the special meanings described | |
8805 | above. The POSIX regular expression specification and ANSI C standard | |
8806 | both require these semantics. Attempting to abandon either convention | |
8807 | would cause other kinds of compatibility problems, possibly more severe | |
8808 | ones. Therefore, without extending the Scheme reader to support | |
8809 | strings with different quoting conventions (an ungainly and confusing | |
8810 | extension when implemented in other languages), we must adhere to this | |
8811 | cumbersome escape syntax. | |
8812 | ||
7ad3c1e7 GH |
8813 | * Changes to the gh_ interface |
8814 | ||
8815 | * Changes to the scm_ interface | |
8816 | ||
8817 | * Changes to system call interfaces: | |
94982a4e | 8818 | |
7ad3c1e7 | 8819 | ** The value returned by `raise' is now unspecified. It throws an exception |
e1a191a8 GH |
8820 | if an error occurs. |
8821 | ||
94982a4e | 8822 | *** A new procedure `sigaction' can be used to install signal handlers |
115b09a5 GH |
8823 | |
8824 | (sigaction signum [action] [flags]) | |
8825 | ||
8826 | signum is the signal number, which can be specified using the value | |
8827 | of SIGINT etc. | |
8828 | ||
8829 | If action is omitted, sigaction returns a pair: the CAR is the current | |
8830 | signal hander, which will be either an integer with the value SIG_DFL | |
8831 | (default action) or SIG_IGN (ignore), or the Scheme procedure which | |
8832 | handles the signal, or #f if a non-Scheme procedure handles the | |
8833 | signal. The CDR contains the current sigaction flags for the handler. | |
8834 | ||
8835 | If action is provided, it is installed as the new handler for signum. | |
8836 | action can be a Scheme procedure taking one argument, or the value of | |
8837 | SIG_DFL (default action) or SIG_IGN (ignore), or #f to restore | |
8838 | whatever signal handler was installed before sigaction was first used. | |
8839 | Flags can optionally be specified for the new handler (SA_RESTART is | |
8840 | always used if the system provides it, so need not be specified.) The | |
8841 | return value is a pair with information about the old handler as | |
8842 | described above. | |
8843 | ||
8844 | This interface does not provide access to the "signal blocking" | |
8845 | facility. Maybe this is not needed, since the thread support may | |
8846 | provide solutions to the problem of consistent access to data | |
8847 | structures. | |
e1a191a8 | 8848 | |
94982a4e | 8849 | *** A new procedure `flush-all-ports' is equivalent to running |
89ea5b7c GH |
8850 | `force-output' on every port open for output. |
8851 | ||
94982a4e JB |
8852 | ** Guile now provides information on how it was built, via the new |
8853 | global variable, %guile-build-info. This variable records the values | |
8854 | of the standard GNU makefile directory variables as an assocation | |
8855 | list, mapping variable names (symbols) onto directory paths (strings). | |
8856 | For example, to find out where the Guile link libraries were | |
8857 | installed, you can say: | |
8858 | ||
8859 | guile -c "(display (assq-ref %guile-build-info 'libdir)) (newline)" | |
8860 | ||
8861 | ||
8862 | * Changes to the scm_ interface | |
8863 | ||
8864 | ** The new function scm_handle_by_message_noexit is just like the | |
8865 | existing scm_handle_by_message function, except that it doesn't call | |
8866 | exit to terminate the process. Instead, it prints a message and just | |
8867 | returns #f. This might be a more appropriate catch-all handler for | |
8868 | new dynamic roots and threads. | |
8869 | ||
cf78e9e8 | 8870 | \f |
c484bf7f | 8871 | Changes in Guile 1.1 (released Friday, May 16 1997): |
f3b1485f JB |
8872 | |
8873 | * Changes to the distribution. | |
8874 | ||
8875 | The Guile 1.0 distribution has been split up into several smaller | |
8876 | pieces: | |
8877 | guile-core --- the Guile interpreter itself. | |
8878 | guile-tcltk --- the interface between the Guile interpreter and | |
8879 | Tcl/Tk; Tcl is an interpreter for a stringy language, and Tk | |
8880 | is a toolkit for building graphical user interfaces. | |
8881 | guile-rgx-ctax --- the interface between Guile and the Rx regular | |
8882 | expression matcher, and the translator for the Ctax | |
8883 | programming language. These are packaged together because the | |
8884 | Ctax translator uses Rx to parse Ctax source code. | |
8885 | ||
095936d2 JB |
8886 | This NEWS file describes the changes made to guile-core since the 1.0 |
8887 | release. | |
8888 | ||
48d224d7 JB |
8889 | We no longer distribute the documentation, since it was either out of |
8890 | date, or incomplete. As soon as we have current documentation, we | |
8891 | will distribute it. | |
8892 | ||
0fcab5ed JB |
8893 | |
8894 | ||
f3b1485f JB |
8895 | * Changes to the stand-alone interpreter |
8896 | ||
48d224d7 JB |
8897 | ** guile now accepts command-line arguments compatible with SCSH, Olin |
8898 | Shivers' Scheme Shell. | |
8899 | ||
8900 | In general, arguments are evaluated from left to right, but there are | |
8901 | exceptions. The following switches stop argument processing, and | |
8902 | stash all remaining command-line arguments as the value returned by | |
8903 | the (command-line) function. | |
8904 | -s SCRIPT load Scheme source code from FILE, and exit | |
8905 | -c EXPR evalute Scheme expression EXPR, and exit | |
8906 | -- stop scanning arguments; run interactively | |
8907 | ||
8908 | The switches below are processed as they are encountered. | |
8909 | -l FILE load Scheme source code from FILE | |
8910 | -e FUNCTION after reading script, apply FUNCTION to | |
8911 | command line arguments | |
8912 | -ds do -s script at this point | |
8913 | --emacs enable Emacs protocol (experimental) | |
8914 | -h, --help display this help and exit | |
8915 | -v, --version display version information and exit | |
8916 | \ read arguments from following script lines | |
8917 | ||
8918 | So, for example, here is a Guile script named `ekko' (thanks, Olin) | |
8919 | which re-implements the traditional "echo" command: | |
8920 | ||
8921 | #!/usr/local/bin/guile -s | |
8922 | !# | |
8923 | (define (main args) | |
8924 | (map (lambda (arg) (display arg) (display " ")) | |
8925 | (cdr args)) | |
8926 | (newline)) | |
8927 | ||
8928 | (main (command-line)) | |
8929 | ||
8930 | Suppose we invoke this script as follows: | |
8931 | ||
8932 | ekko a speckled gecko | |
8933 | ||
8934 | Through the magic of Unix script processing (triggered by the `#!' | |
8935 | token at the top of the file), /usr/local/bin/guile receives the | |
8936 | following list of command-line arguments: | |
8937 | ||
8938 | ("-s" "./ekko" "a" "speckled" "gecko") | |
8939 | ||
8940 | Unix inserts the name of the script after the argument specified on | |
8941 | the first line of the file (in this case, "-s"), and then follows that | |
8942 | with the arguments given to the script. Guile loads the script, which | |
8943 | defines the `main' function, and then applies it to the list of | |
8944 | remaining command-line arguments, ("a" "speckled" "gecko"). | |
8945 | ||
095936d2 JB |
8946 | In Unix, the first line of a script file must take the following form: |
8947 | ||
8948 | #!INTERPRETER ARGUMENT | |
8949 | ||
8950 | where INTERPRETER is the absolute filename of the interpreter | |
8951 | executable, and ARGUMENT is a single command-line argument to pass to | |
8952 | the interpreter. | |
8953 | ||
8954 | You may only pass one argument to the interpreter, and its length is | |
8955 | limited. These restrictions can be annoying to work around, so Guile | |
8956 | provides a general mechanism (borrowed from, and compatible with, | |
8957 | SCSH) for circumventing them. | |
8958 | ||
8959 | If the ARGUMENT in a Guile script is a single backslash character, | |
8960 | `\', Guile will open the script file, parse arguments from its second | |
8961 | and subsequent lines, and replace the `\' with them. So, for example, | |
8962 | here is another implementation of the `ekko' script: | |
8963 | ||
8964 | #!/usr/local/bin/guile \ | |
8965 | -e main -s | |
8966 | !# | |
8967 | (define (main args) | |
8968 | (for-each (lambda (arg) (display arg) (display " ")) | |
8969 | (cdr args)) | |
8970 | (newline)) | |
8971 | ||
8972 | If the user invokes this script as follows: | |
8973 | ||
8974 | ekko a speckled gecko | |
8975 | ||
8976 | Unix expands this into | |
8977 | ||
8978 | /usr/local/bin/guile \ ekko a speckled gecko | |
8979 | ||
8980 | When Guile sees the `\' argument, it replaces it with the arguments | |
8981 | read from the second line of the script, producing: | |
8982 | ||
8983 | /usr/local/bin/guile -e main -s ekko a speckled gecko | |
8984 | ||
8985 | This tells Guile to load the `ekko' script, and apply the function | |
8986 | `main' to the argument list ("a" "speckled" "gecko"). | |
8987 | ||
8988 | Here is how Guile parses the command-line arguments: | |
8989 | - Each space character terminates an argument. This means that two | |
8990 | spaces in a row introduce an empty-string argument. | |
8991 | - The tab character is not permitted (unless you quote it with the | |
8992 | backslash character, as described below), to avoid confusion. | |
8993 | - The newline character terminates the sequence of arguments, and will | |
8994 | also terminate a final non-empty argument. (However, a newline | |
8995 | following a space will not introduce a final empty-string argument; | |
8996 | it only terminates the argument list.) | |
8997 | - The backslash character is the escape character. It escapes | |
8998 | backslash, space, tab, and newline. The ANSI C escape sequences | |
8999 | like \n and \t are also supported. These produce argument | |
9000 | constituents; the two-character combination \n doesn't act like a | |
9001 | terminating newline. The escape sequence \NNN for exactly three | |
9002 | octal digits reads as the character whose ASCII code is NNN. As | |
9003 | above, characters produced this way are argument constituents. | |
9004 | Backslash followed by other characters is not allowed. | |
9005 | ||
48d224d7 JB |
9006 | * Changes to the procedure for linking libguile with your programs |
9007 | ||
9008 | ** Guile now builds and installs a shared guile library, if your | |
9009 | system support shared libraries. (It still builds a static library on | |
9010 | all systems.) Guile automatically detects whether your system | |
9011 | supports shared libraries. To prevent Guile from buildisg shared | |
9012 | libraries, pass the `--disable-shared' flag to the configure script. | |
9013 | ||
9014 | Guile takes longer to compile when it builds shared libraries, because | |
9015 | it must compile every file twice --- once to produce position- | |
9016 | independent object code, and once to produce normal object code. | |
9017 | ||
9018 | ** The libthreads library has been merged into libguile. | |
9019 | ||
9020 | To link a program against Guile, you now need only link against | |
9021 | -lguile and -lqt; -lthreads is no longer needed. If you are using | |
9022 | autoconf to generate configuration scripts for your application, the | |
9023 | following lines should suffice to add the appropriate libraries to | |
9024 | your link command: | |
9025 | ||
9026 | ### Find quickthreads and libguile. | |
9027 | AC_CHECK_LIB(qt, main) | |
9028 | AC_CHECK_LIB(guile, scm_shell) | |
f3b1485f JB |
9029 | |
9030 | * Changes to Scheme functions | |
9031 | ||
095936d2 JB |
9032 | ** Guile Scheme's special syntax for keyword objects is now optional, |
9033 | and disabled by default. | |
9034 | ||
9035 | The syntax variation from R4RS made it difficult to port some | |
9036 | interesting packages to Guile. The routines which accepted keyword | |
9037 | arguments (mostly in the module system) have been modified to also | |
9038 | accept symbols whose names begin with `:'. | |
9039 | ||
9040 | To change the keyword syntax, you must first import the (ice-9 debug) | |
9041 | module: | |
9042 | (use-modules (ice-9 debug)) | |
9043 | ||
9044 | Then you can enable the keyword syntax as follows: | |
9045 | (read-set! keywords 'prefix) | |
9046 | ||
9047 | To disable keyword syntax, do this: | |
9048 | (read-set! keywords #f) | |
9049 | ||
9050 | ** Many more primitive functions accept shared substrings as | |
9051 | arguments. In the past, these functions required normal, mutable | |
9052 | strings as arguments, although they never made use of this | |
9053 | restriction. | |
9054 | ||
9055 | ** The uniform array functions now operate on byte vectors. These | |
9056 | functions are `array-fill!', `serial-array-copy!', `array-copy!', | |
9057 | `serial-array-map', `array-map', `array-for-each', and | |
9058 | `array-index-map!'. | |
9059 | ||
9060 | ** The new functions `trace' and `untrace' implement simple debugging | |
9061 | support for Scheme functions. | |
9062 | ||
9063 | The `trace' function accepts any number of procedures as arguments, | |
9064 | and tells the Guile interpreter to display each procedure's name and | |
9065 | arguments each time the procedure is invoked. When invoked with no | |
9066 | arguments, `trace' returns the list of procedures currently being | |
9067 | traced. | |
9068 | ||
9069 | The `untrace' function accepts any number of procedures as arguments, | |
9070 | and tells the Guile interpreter not to trace them any more. When | |
9071 | invoked with no arguments, `untrace' untraces all curretly traced | |
9072 | procedures. | |
9073 | ||
9074 | The tracing in Guile has an advantage over most other systems: we | |
9075 | don't create new procedure objects, but mark the procedure objects | |
9076 | themselves. This means that anonymous and internal procedures can be | |
9077 | traced. | |
9078 | ||
9079 | ** The function `assert-repl-prompt' has been renamed to | |
9080 | `set-repl-prompt!'. It takes one argument, PROMPT. | |
9081 | - If PROMPT is #f, the Guile read-eval-print loop will not prompt. | |
9082 | - If PROMPT is a string, we use it as a prompt. | |
9083 | - If PROMPT is a procedure accepting no arguments, we call it, and | |
9084 | display the result as a prompt. | |
9085 | - Otherwise, we display "> ". | |
9086 | ||
9087 | ** The new function `eval-string' reads Scheme expressions from a | |
9088 | string and evaluates them, returning the value of the last expression | |
9089 | in the string. If the string contains no expressions, it returns an | |
9090 | unspecified value. | |
9091 | ||
9092 | ** The new function `thunk?' returns true iff its argument is a | |
9093 | procedure of zero arguments. | |
9094 | ||
9095 | ** `defined?' is now a builtin function, instead of syntax. This | |
9096 | means that its argument should be quoted. It returns #t iff its | |
9097 | argument is bound in the current module. | |
9098 | ||
9099 | ** The new syntax `use-modules' allows you to add new modules to your | |
9100 | environment without re-typing a complete `define-module' form. It | |
9101 | accepts any number of module names as arguments, and imports their | |
9102 | public bindings into the current module. | |
9103 | ||
9104 | ** The new function (module-defined? NAME MODULE) returns true iff | |
9105 | NAME, a symbol, is defined in MODULE, a module object. | |
9106 | ||
9107 | ** The new function `builtin-bindings' creates and returns a hash | |
9108 | table containing copies of all the root module's bindings. | |
9109 | ||
9110 | ** The new function `builtin-weak-bindings' does the same as | |
9111 | `builtin-bindings', but creates a doubly-weak hash table. | |
9112 | ||
9113 | ** The `equal?' function now considers variable objects to be | |
9114 | equivalent if they have the same name and the same value. | |
9115 | ||
9116 | ** The new function `command-line' returns the command-line arguments | |
9117 | given to Guile, as a list of strings. | |
9118 | ||
9119 | When using guile as a script interpreter, `command-line' returns the | |
9120 | script's arguments; those processed by the interpreter (like `-s' or | |
9121 | `-c') are omitted. (In other words, you get the normal, expected | |
9122 | behavior.) Any application that uses scm_shell to process its | |
9123 | command-line arguments gets this behavior as well. | |
9124 | ||
9125 | ** The new function `load-user-init' looks for a file called `.guile' | |
9126 | in the user's home directory, and loads it if it exists. This is | |
9127 | mostly for use by the code generated by scm_compile_shell_switches, | |
9128 | but we thought it might also be useful in other circumstances. | |
9129 | ||
9130 | ** The new function `log10' returns the base-10 logarithm of its | |
9131 | argument. | |
9132 | ||
9133 | ** Changes to I/O functions | |
9134 | ||
6c0201ad | 9135 | *** The functions `read', `primitive-load', `read-and-eval!', and |
095936d2 JB |
9136 | `primitive-load-path' no longer take optional arguments controlling |
9137 | case insensitivity and a `#' parser. | |
9138 | ||
9139 | Case sensitivity is now controlled by a read option called | |
9140 | `case-insensitive'. The user can add new `#' syntaxes with the | |
9141 | `read-hash-extend' function (see below). | |
9142 | ||
9143 | *** The new function `read-hash-extend' allows the user to change the | |
9144 | syntax of Guile Scheme in a somewhat controlled way. | |
9145 | ||
9146 | (read-hash-extend CHAR PROC) | |
9147 | When parsing S-expressions, if we read a `#' character followed by | |
9148 | the character CHAR, use PROC to parse an object from the stream. | |
9149 | If PROC is #f, remove any parsing procedure registered for CHAR. | |
9150 | ||
9151 | The reader applies PROC to two arguments: CHAR and an input port. | |
9152 | ||
6c0201ad | 9153 | *** The new functions read-delimited and read-delimited! provide a |
095936d2 JB |
9154 | general mechanism for doing delimited input on streams. |
9155 | ||
9156 | (read-delimited DELIMS [PORT HANDLE-DELIM]) | |
9157 | Read until we encounter one of the characters in DELIMS (a string), | |
9158 | or end-of-file. PORT is the input port to read from; it defaults to | |
9159 | the current input port. The HANDLE-DELIM parameter determines how | |
9160 | the terminating character is handled; it should be one of the | |
9161 | following symbols: | |
9162 | ||
9163 | 'trim omit delimiter from result | |
9164 | 'peek leave delimiter character in input stream | |
9165 | 'concat append delimiter character to returned value | |
9166 | 'split return a pair: (RESULT . TERMINATOR) | |
9167 | ||
9168 | HANDLE-DELIM defaults to 'peek. | |
9169 | ||
9170 | (read-delimited! DELIMS BUF [PORT HANDLE-DELIM START END]) | |
9171 | A side-effecting variant of `read-delimited'. | |
9172 | ||
9173 | The data is written into the string BUF at the indices in the | |
9174 | half-open interval [START, END); the default interval is the whole | |
9175 | string: START = 0 and END = (string-length BUF). The values of | |
9176 | START and END must specify a well-defined interval in BUF, i.e. | |
9177 | 0 <= START <= END <= (string-length BUF). | |
9178 | ||
9179 | It returns NBYTES, the number of bytes read. If the buffer filled | |
9180 | up without a delimiter character being found, it returns #f. If the | |
9181 | port is at EOF when the read starts, it returns the EOF object. | |
9182 | ||
9183 | If an integer is returned (i.e., the read is successfully terminated | |
9184 | by reading a delimiter character), then the HANDLE-DELIM parameter | |
9185 | determines how to handle the terminating character. It is described | |
9186 | above, and defaults to 'peek. | |
9187 | ||
9188 | (The descriptions of these functions were borrowed from the SCSH | |
9189 | manual, by Olin Shivers and Brian Carlstrom.) | |
9190 | ||
9191 | *** The `%read-delimited!' function is the primitive used to implement | |
9192 | `read-delimited' and `read-delimited!'. | |
9193 | ||
9194 | (%read-delimited! DELIMS BUF GOBBLE? [PORT START END]) | |
9195 | ||
9196 | This returns a pair of values: (TERMINATOR . NUM-READ). | |
9197 | - TERMINATOR describes why the read was terminated. If it is a | |
9198 | character or the eof object, then that is the value that terminated | |
9199 | the read. If it is #f, the function filled the buffer without finding | |
9200 | a delimiting character. | |
9201 | - NUM-READ is the number of characters read into BUF. | |
9202 | ||
9203 | If the read is successfully terminated by reading a delimiter | |
9204 | character, then the gobble? parameter determines what to do with the | |
9205 | terminating character. If true, the character is removed from the | |
9206 | input stream; if false, the character is left in the input stream | |
9207 | where a subsequent read operation will retrieve it. In either case, | |
9208 | the character is also the first value returned by the procedure call. | |
9209 | ||
9210 | (The descriptions of this function was borrowed from the SCSH manual, | |
9211 | by Olin Shivers and Brian Carlstrom.) | |
9212 | ||
9213 | *** The `read-line' and `read-line!' functions have changed; they now | |
9214 | trim the terminator by default; previously they appended it to the | |
9215 | returned string. For the old behavior, use (read-line PORT 'concat). | |
9216 | ||
9217 | *** The functions `uniform-array-read!' and `uniform-array-write!' now | |
9218 | take new optional START and END arguments, specifying the region of | |
9219 | the array to read and write. | |
9220 | ||
f348c807 JB |
9221 | *** The `ungetc-char-ready?' function has been removed. We feel it's |
9222 | inappropriate for an interface to expose implementation details this | |
9223 | way. | |
095936d2 JB |
9224 | |
9225 | ** Changes to the Unix library and system call interface | |
9226 | ||
9227 | *** The new fcntl function provides access to the Unix `fcntl' system | |
9228 | call. | |
9229 | ||
9230 | (fcntl PORT COMMAND VALUE) | |
9231 | Apply COMMAND to PORT's file descriptor, with VALUE as an argument. | |
9232 | Values for COMMAND are: | |
9233 | ||
9234 | F_DUPFD duplicate a file descriptor | |
9235 | F_GETFD read the descriptor's close-on-exec flag | |
9236 | F_SETFD set the descriptor's close-on-exec flag to VALUE | |
9237 | F_GETFL read the descriptor's flags, as set on open | |
9238 | F_SETFL set the descriptor's flags, as set on open to VALUE | |
9239 | F_GETOWN return the process ID of a socket's owner, for SIGIO | |
9240 | F_SETOWN set the process that owns a socket to VALUE, for SIGIO | |
9241 | FD_CLOEXEC not sure what this is | |
9242 | ||
9243 | For details, see the documentation for the fcntl system call. | |
9244 | ||
9245 | *** The arguments to `select' have changed, for compatibility with | |
9246 | SCSH. The TIMEOUT parameter may now be non-integral, yielding the | |
9247 | expected behavior. The MILLISECONDS parameter has been changed to | |
9248 | MICROSECONDS, to more closely resemble the underlying system call. | |
9249 | The RVEC, WVEC, and EVEC arguments can now be vectors; the type of the | |
9250 | corresponding return set will be the same. | |
9251 | ||
9252 | *** The arguments to the `mknod' system call have changed. They are | |
9253 | now: | |
9254 | ||
9255 | (mknod PATH TYPE PERMS DEV) | |
9256 | Create a new file (`node') in the file system. PATH is the name of | |
9257 | the file to create. TYPE is the kind of file to create; it should | |
9258 | be 'fifo, 'block-special, or 'char-special. PERMS specifies the | |
9259 | permission bits to give the newly created file. If TYPE is | |
9260 | 'block-special or 'char-special, DEV specifies which device the | |
9261 | special file refers to; its interpretation depends on the kind of | |
9262 | special file being created. | |
9263 | ||
9264 | *** The `fork' function has been renamed to `primitive-fork', to avoid | |
9265 | clashing with various SCSH forks. | |
9266 | ||
9267 | *** The `recv' and `recvfrom' functions have been renamed to `recv!' | |
9268 | and `recvfrom!'. They no longer accept a size for a second argument; | |
9269 | you must pass a string to hold the received value. They no longer | |
9270 | return the buffer. Instead, `recv' returns the length of the message | |
9271 | received, and `recvfrom' returns a pair containing the packet's length | |
6c0201ad | 9272 | and originating address. |
095936d2 JB |
9273 | |
9274 | *** The file descriptor datatype has been removed, as have the | |
9275 | `read-fd', `write-fd', `close', `lseek', and `dup' functions. | |
9276 | We plan to replace these functions with a SCSH-compatible interface. | |
9277 | ||
9278 | *** The `create' function has been removed; it's just a special case | |
9279 | of `open'. | |
9280 | ||
9281 | *** There are new functions to break down process termination status | |
9282 | values. In the descriptions below, STATUS is a value returned by | |
9283 | `waitpid'. | |
9284 | ||
9285 | (status:exit-val STATUS) | |
9286 | If the child process exited normally, this function returns the exit | |
9287 | code for the child process (i.e., the value passed to exit, or | |
9288 | returned from main). If the child process did not exit normally, | |
9289 | this function returns #f. | |
9290 | ||
9291 | (status:stop-sig STATUS) | |
9292 | If the child process was suspended by a signal, this function | |
9293 | returns the signal that suspended the child. Otherwise, it returns | |
9294 | #f. | |
9295 | ||
9296 | (status:term-sig STATUS) | |
9297 | If the child process terminated abnormally, this function returns | |
9298 | the signal that terminated the child. Otherwise, this function | |
9299 | returns false. | |
9300 | ||
9301 | POSIX promises that exactly one of these functions will return true on | |
9302 | a valid STATUS value. | |
9303 | ||
9304 | These functions are compatible with SCSH. | |
9305 | ||
9306 | *** There are new accessors and setters for the broken-out time vectors | |
48d224d7 JB |
9307 | returned by `localtime', `gmtime', and that ilk. They are: |
9308 | ||
9309 | Component Accessor Setter | |
9310 | ========================= ============ ============ | |
9311 | seconds tm:sec set-tm:sec | |
9312 | minutes tm:min set-tm:min | |
9313 | hours tm:hour set-tm:hour | |
9314 | day of the month tm:mday set-tm:mday | |
9315 | month tm:mon set-tm:mon | |
9316 | year tm:year set-tm:year | |
9317 | day of the week tm:wday set-tm:wday | |
9318 | day in the year tm:yday set-tm:yday | |
9319 | daylight saving time tm:isdst set-tm:isdst | |
9320 | GMT offset, seconds tm:gmtoff set-tm:gmtoff | |
9321 | name of time zone tm:zone set-tm:zone | |
9322 | ||
095936d2 JB |
9323 | *** There are new accessors for the vectors returned by `uname', |
9324 | describing the host system: | |
48d224d7 JB |
9325 | |
9326 | Component Accessor | |
9327 | ============================================== ================ | |
9328 | name of the operating system implementation utsname:sysname | |
9329 | network name of this machine utsname:nodename | |
9330 | release level of the operating system utsname:release | |
9331 | version level of the operating system utsname:version | |
9332 | machine hardware platform utsname:machine | |
9333 | ||
095936d2 JB |
9334 | *** There are new accessors for the vectors returned by `getpw', |
9335 | `getpwnam', `getpwuid', and `getpwent', describing entries from the | |
9336 | system's user database: | |
9337 | ||
9338 | Component Accessor | |
9339 | ====================== ================= | |
9340 | user name passwd:name | |
9341 | user password passwd:passwd | |
9342 | user id passwd:uid | |
9343 | group id passwd:gid | |
9344 | real name passwd:gecos | |
9345 | home directory passwd:dir | |
9346 | shell program passwd:shell | |
9347 | ||
9348 | *** There are new accessors for the vectors returned by `getgr', | |
9349 | `getgrnam', `getgrgid', and `getgrent', describing entries from the | |
9350 | system's group database: | |
9351 | ||
9352 | Component Accessor | |
9353 | ======================= ============ | |
9354 | group name group:name | |
9355 | group password group:passwd | |
9356 | group id group:gid | |
9357 | group members group:mem | |
9358 | ||
9359 | *** There are new accessors for the vectors returned by `gethost', | |
9360 | `gethostbyaddr', `gethostbyname', and `gethostent', describing | |
9361 | internet hosts: | |
9362 | ||
9363 | Component Accessor | |
9364 | ========================= =============== | |
9365 | official name of host hostent:name | |
9366 | alias list hostent:aliases | |
9367 | host address type hostent:addrtype | |
9368 | length of address hostent:length | |
9369 | list of addresses hostent:addr-list | |
9370 | ||
9371 | *** There are new accessors for the vectors returned by `getnet', | |
9372 | `getnetbyaddr', `getnetbyname', and `getnetent', describing internet | |
9373 | networks: | |
9374 | ||
9375 | Component Accessor | |
9376 | ========================= =============== | |
9377 | official name of net netent:name | |
9378 | alias list netent:aliases | |
9379 | net number type netent:addrtype | |
9380 | net number netent:net | |
9381 | ||
9382 | *** There are new accessors for the vectors returned by `getproto', | |
9383 | `getprotobyname', `getprotobynumber', and `getprotoent', describing | |
9384 | internet protocols: | |
9385 | ||
9386 | Component Accessor | |
9387 | ========================= =============== | |
9388 | official protocol name protoent:name | |
9389 | alias list protoent:aliases | |
9390 | protocol number protoent:proto | |
9391 | ||
9392 | *** There are new accessors for the vectors returned by `getserv', | |
9393 | `getservbyname', `getservbyport', and `getservent', describing | |
9394 | internet protocols: | |
9395 | ||
9396 | Component Accessor | |
9397 | ========================= =============== | |
6c0201ad | 9398 | official service name servent:name |
095936d2 | 9399 | alias list servent:aliases |
6c0201ad TTN |
9400 | port number servent:port |
9401 | protocol to use servent:proto | |
095936d2 JB |
9402 | |
9403 | *** There are new accessors for the sockaddr structures returned by | |
9404 | `accept', `getsockname', `getpeername', `recvfrom!': | |
9405 | ||
9406 | Component Accessor | |
9407 | ======================================== =============== | |
6c0201ad | 9408 | address format (`family') sockaddr:fam |
095936d2 JB |
9409 | path, for file domain addresses sockaddr:path |
9410 | address, for internet domain addresses sockaddr:addr | |
9411 | TCP or UDP port, for internet sockaddr:port | |
9412 | ||
9413 | *** The `getpwent', `getgrent', `gethostent', `getnetent', | |
9414 | `getprotoent', and `getservent' functions now return #f at the end of | |
9415 | the user database. (They used to throw an exception.) | |
9416 | ||
9417 | Note that calling MUMBLEent function is equivalent to calling the | |
9418 | corresponding MUMBLE function with no arguments. | |
9419 | ||
9420 | *** The `setpwent', `setgrent', `sethostent', `setnetent', | |
9421 | `setprotoent', and `setservent' routines now take no arguments. | |
9422 | ||
9423 | *** The `gethost', `getproto', `getnet', and `getserv' functions now | |
9424 | provide more useful information when they throw an exception. | |
9425 | ||
9426 | *** The `lnaof' function has been renamed to `inet-lnaof'. | |
9427 | ||
9428 | *** Guile now claims to have the `current-time' feature. | |
9429 | ||
9430 | *** The `mktime' function now takes an optional second argument ZONE, | |
9431 | giving the time zone to use for the conversion. ZONE should be a | |
9432 | string, in the same format as expected for the "TZ" environment variable. | |
9433 | ||
9434 | *** The `strptime' function now returns a pair (TIME . COUNT), where | |
9435 | TIME is the parsed time as a vector, and COUNT is the number of | |
9436 | characters from the string left unparsed. This function used to | |
9437 | return the remaining characters as a string. | |
9438 | ||
9439 | *** The `gettimeofday' function has replaced the old `time+ticks' function. | |
9440 | The return value is now (SECONDS . MICROSECONDS); the fractional | |
9441 | component is no longer expressed in "ticks". | |
9442 | ||
9443 | *** The `ticks/sec' constant has been removed, in light of the above change. | |
6685dc83 | 9444 | |
ea00ecba MG |
9445 | * Changes to the gh_ interface |
9446 | ||
9447 | ** gh_eval_str() now returns an SCM object which is the result of the | |
9448 | evaluation | |
9449 | ||
aaef0d2a MG |
9450 | ** gh_scm2str() now copies the Scheme data to a caller-provided C |
9451 | array | |
9452 | ||
9453 | ** gh_scm2newstr() now makes a C array, copies the Scheme data to it, | |
9454 | and returns the array | |
9455 | ||
9456 | ** gh_scm2str0() is gone: there is no need to distinguish | |
9457 | null-terminated from non-null-terminated, since gh_scm2newstr() allows | |
9458 | the user to interpret the data both ways. | |
9459 | ||
f3b1485f JB |
9460 | * Changes to the scm_ interface |
9461 | ||
095936d2 JB |
9462 | ** The new function scm_symbol_value0 provides an easy way to get a |
9463 | symbol's value from C code: | |
9464 | ||
9465 | SCM scm_symbol_value0 (char *NAME) | |
9466 | Return the value of the symbol named by the null-terminated string | |
9467 | NAME in the current module. If the symbol named NAME is unbound in | |
9468 | the current module, return SCM_UNDEFINED. | |
9469 | ||
9470 | ** The new function scm_sysintern0 creates new top-level variables, | |
9471 | without assigning them a value. | |
9472 | ||
9473 | SCM scm_sysintern0 (char *NAME) | |
9474 | Create a new Scheme top-level variable named NAME. NAME is a | |
9475 | null-terminated string. Return the variable's value cell. | |
9476 | ||
9477 | ** The function scm_internal_catch is the guts of catch. It handles | |
9478 | all the mechanics of setting up a catch target, invoking the catch | |
9479 | body, and perhaps invoking the handler if the body does a throw. | |
9480 | ||
9481 | The function is designed to be usable from C code, but is general | |
9482 | enough to implement all the semantics Guile Scheme expects from throw. | |
9483 | ||
9484 | TAG is the catch tag. Typically, this is a symbol, but this function | |
9485 | doesn't actually care about that. | |
9486 | ||
9487 | BODY is a pointer to a C function which runs the body of the catch; | |
9488 | this is the code you can throw from. We call it like this: | |
9489 | BODY (BODY_DATA, JMPBUF) | |
9490 | where: | |
9491 | BODY_DATA is just the BODY_DATA argument we received; we pass it | |
9492 | through to BODY as its first argument. The caller can make | |
9493 | BODY_DATA point to anything useful that BODY might need. | |
9494 | JMPBUF is the Scheme jmpbuf object corresponding to this catch, | |
9495 | which we have just created and initialized. | |
9496 | ||
9497 | HANDLER is a pointer to a C function to deal with a throw to TAG, | |
9498 | should one occur. We call it like this: | |
9499 | HANDLER (HANDLER_DATA, THROWN_TAG, THROW_ARGS) | |
9500 | where | |
9501 | HANDLER_DATA is the HANDLER_DATA argument we recevied; it's the | |
9502 | same idea as BODY_DATA above. | |
9503 | THROWN_TAG is the tag that the user threw to; usually this is | |
9504 | TAG, but it could be something else if TAG was #t (i.e., a | |
9505 | catch-all), or the user threw to a jmpbuf. | |
9506 | THROW_ARGS is the list of arguments the user passed to the THROW | |
9507 | function. | |
9508 | ||
9509 | BODY_DATA is just a pointer we pass through to BODY. HANDLER_DATA | |
9510 | is just a pointer we pass through to HANDLER. We don't actually | |
9511 | use either of those pointers otherwise ourselves. The idea is | |
9512 | that, if our caller wants to communicate something to BODY or | |
9513 | HANDLER, it can pass a pointer to it as MUMBLE_DATA, which BODY and | |
9514 | HANDLER can then use. Think of it as a way to make BODY and | |
9515 | HANDLER closures, not just functions; MUMBLE_DATA points to the | |
9516 | enclosed variables. | |
9517 | ||
9518 | Of course, it's up to the caller to make sure that any data a | |
9519 | MUMBLE_DATA needs is protected from GC. A common way to do this is | |
9520 | to make MUMBLE_DATA a pointer to data stored in an automatic | |
9521 | structure variable; since the collector must scan the stack for | |
9522 | references anyway, this assures that any references in MUMBLE_DATA | |
9523 | will be found. | |
9524 | ||
9525 | ** The new function scm_internal_lazy_catch is exactly like | |
9526 | scm_internal_catch, except: | |
9527 | ||
9528 | - It does not unwind the stack (this is the major difference). | |
9529 | - If handler returns, its value is returned from the throw. | |
9530 | - BODY always receives #f as its JMPBUF argument (since there's no | |
9531 | jmpbuf associated with a lazy catch, because we don't unwind the | |
9532 | stack.) | |
9533 | ||
9534 | ** scm_body_thunk is a new body function you can pass to | |
9535 | scm_internal_catch if you want the body to be like Scheme's `catch' | |
9536 | --- a thunk, or a function of one argument if the tag is #f. | |
9537 | ||
9538 | BODY_DATA is a pointer to a scm_body_thunk_data structure, which | |
9539 | contains the Scheme procedure to invoke as the body, and the tag | |
9540 | we're catching. If the tag is #f, then we pass JMPBUF (created by | |
9541 | scm_internal_catch) to the body procedure; otherwise, the body gets | |
9542 | no arguments. | |
9543 | ||
9544 | ** scm_handle_by_proc is a new handler function you can pass to | |
9545 | scm_internal_catch if you want the handler to act like Scheme's catch | |
9546 | --- call a procedure with the tag and the throw arguments. | |
9547 | ||
9548 | If the user does a throw to this catch, this function runs a handler | |
9549 | procedure written in Scheme. HANDLER_DATA is a pointer to an SCM | |
9550 | variable holding the Scheme procedure object to invoke. It ought to | |
9551 | be a pointer to an automatic variable (i.e., one living on the stack), | |
9552 | or the procedure object should be otherwise protected from GC. | |
9553 | ||
9554 | ** scm_handle_by_message is a new handler function to use with | |
9555 | `scm_internal_catch' if you want Guile to print a message and die. | |
9556 | It's useful for dealing with throws to uncaught keys at the top level. | |
9557 | ||
9558 | HANDLER_DATA, if non-zero, is assumed to be a char * pointing to a | |
9559 | message header to print; if zero, we use "guile" instead. That | |
9560 | text is followed by a colon, then the message described by ARGS. | |
9561 | ||
9562 | ** The return type of scm_boot_guile is now void; the function does | |
9563 | not return a value, and indeed, never returns at all. | |
9564 | ||
f3b1485f JB |
9565 | ** The new function scm_shell makes it easy for user applications to |
9566 | process command-line arguments in a way that is compatible with the | |
9567 | stand-alone guile interpreter (which is in turn compatible with SCSH, | |
9568 | the Scheme shell). | |
9569 | ||
9570 | To use the scm_shell function, first initialize any guile modules | |
9571 | linked into your application, and then call scm_shell with the values | |
7ed46dc8 | 9572 | of ARGC and ARGV your `main' function received. scm_shell will add |
f3b1485f JB |
9573 | any SCSH-style meta-arguments from the top of the script file to the |
9574 | argument vector, and then process the command-line arguments. This | |
9575 | generally means loading a script file or starting up an interactive | |
9576 | command interpreter. For details, see "Changes to the stand-alone | |
9577 | interpreter" above. | |
9578 | ||
095936d2 | 9579 | ** The new functions scm_get_meta_args and scm_count_argv help you |
6c0201ad | 9580 | implement the SCSH-style meta-argument, `\'. |
095936d2 JB |
9581 | |
9582 | char **scm_get_meta_args (int ARGC, char **ARGV) | |
9583 | If the second element of ARGV is a string consisting of a single | |
9584 | backslash character (i.e. "\\" in Scheme notation), open the file | |
9585 | named by the following argument, parse arguments from it, and return | |
9586 | the spliced command line. The returned array is terminated by a | |
9587 | null pointer. | |
6c0201ad | 9588 | |
095936d2 JB |
9589 | For details of argument parsing, see above, under "guile now accepts |
9590 | command-line arguments compatible with SCSH..." | |
9591 | ||
9592 | int scm_count_argv (char **ARGV) | |
9593 | Count the arguments in ARGV, assuming it is terminated by a null | |
9594 | pointer. | |
9595 | ||
9596 | For an example of how these functions might be used, see the source | |
9597 | code for the function scm_shell in libguile/script.c. | |
9598 | ||
9599 | You will usually want to use scm_shell instead of calling this | |
9600 | function yourself. | |
9601 | ||
9602 | ** The new function scm_compile_shell_switches turns an array of | |
9603 | command-line arguments into Scheme code to carry out the actions they | |
9604 | describe. Given ARGC and ARGV, it returns a Scheme expression to | |
9605 | evaluate, and calls scm_set_program_arguments to make any remaining | |
9606 | command-line arguments available to the Scheme code. For example, | |
9607 | given the following arguments: | |
9608 | ||
9609 | -e main -s ekko a speckled gecko | |
9610 | ||
9611 | scm_set_program_arguments will return the following expression: | |
9612 | ||
9613 | (begin (load "ekko") (main (command-line)) (quit)) | |
9614 | ||
9615 | You will usually want to use scm_shell instead of calling this | |
9616 | function yourself. | |
9617 | ||
9618 | ** The function scm_shell_usage prints a usage message appropriate for | |
9619 | an interpreter that uses scm_compile_shell_switches to handle its | |
9620 | command-line arguments. | |
9621 | ||
9622 | void scm_shell_usage (int FATAL, char *MESSAGE) | |
9623 | Print a usage message to the standard error output. If MESSAGE is | |
9624 | non-zero, write it before the usage message, followed by a newline. | |
9625 | If FATAL is non-zero, exit the process, using FATAL as the | |
9626 | termination status. (If you want to be compatible with Guile, | |
9627 | always use 1 as the exit status when terminating due to command-line | |
9628 | usage problems.) | |
9629 | ||
9630 | You will usually want to use scm_shell instead of calling this | |
9631 | function yourself. | |
48d224d7 JB |
9632 | |
9633 | ** scm_eval_0str now returns SCM_UNSPECIFIED if the string contains no | |
095936d2 JB |
9634 | expressions. It used to return SCM_EOL. Earth-shattering. |
9635 | ||
9636 | ** The macros for declaring scheme objects in C code have been | |
9637 | rearranged slightly. They are now: | |
9638 | ||
9639 | SCM_SYMBOL (C_NAME, SCHEME_NAME) | |
9640 | Declare a static SCM variable named C_NAME, and initialize it to | |
9641 | point to the Scheme symbol whose name is SCHEME_NAME. C_NAME should | |
9642 | be a C identifier, and SCHEME_NAME should be a C string. | |
9643 | ||
9644 | SCM_GLOBAL_SYMBOL (C_NAME, SCHEME_NAME) | |
9645 | Just like SCM_SYMBOL, but make C_NAME globally visible. | |
9646 | ||
9647 | SCM_VCELL (C_NAME, SCHEME_NAME) | |
9648 | Create a global variable at the Scheme level named SCHEME_NAME. | |
9649 | Declare a static SCM variable named C_NAME, and initialize it to | |
9650 | point to the Scheme variable's value cell. | |
9651 | ||
9652 | SCM_GLOBAL_VCELL (C_NAME, SCHEME_NAME) | |
9653 | Just like SCM_VCELL, but make C_NAME globally visible. | |
9654 | ||
9655 | The `guile-snarf' script writes initialization code for these macros | |
9656 | to its standard output, given C source code as input. | |
9657 | ||
9658 | The SCM_GLOBAL macro is gone. | |
9659 | ||
9660 | ** The scm_read_line and scm_read_line_x functions have been replaced | |
9661 | by Scheme code based on the %read-delimited! procedure (known to C | |
9662 | code as scm_read_delimited_x). See its description above for more | |
9663 | information. | |
48d224d7 | 9664 | |
095936d2 JB |
9665 | ** The function scm_sys_open has been renamed to scm_open. It now |
9666 | returns a port instead of an FD object. | |
ea00ecba | 9667 | |
095936d2 JB |
9668 | * The dynamic linking support has changed. For more information, see |
9669 | libguile/DYNAMIC-LINKING. | |
ea00ecba | 9670 | |
f7b47737 JB |
9671 | \f |
9672 | Guile 1.0b3 | |
3065a62a | 9673 | |
f3b1485f JB |
9674 | User-visible changes from Thursday, September 5, 1996 until Guile 1.0 |
9675 | (Sun 5 Jan 1997): | |
3065a62a | 9676 | |
4b521edb | 9677 | * Changes to the 'guile' program: |
3065a62a | 9678 | |
4b521edb JB |
9679 | ** Guile now loads some new files when it starts up. Guile first |
9680 | searches the load path for init.scm, and loads it if found. Then, if | |
9681 | Guile is not being used to execute a script, and the user's home | |
9682 | directory contains a file named `.guile', Guile loads that. | |
c6486f8a | 9683 | |
4b521edb | 9684 | ** You can now use Guile as a shell script interpreter. |
3065a62a JB |
9685 | |
9686 | To paraphrase the SCSH manual: | |
9687 | ||
9688 | When Unix tries to execute an executable file whose first two | |
9689 | characters are the `#!', it treats the file not as machine code to | |
9690 | be directly executed by the native processor, but as source code | |
9691 | to be executed by some interpreter. The interpreter to use is | |
9692 | specified immediately after the #! sequence on the first line of | |
9693 | the source file. The kernel reads in the name of the interpreter, | |
9694 | and executes that instead. It passes the interpreter the source | |
9695 | filename as its first argument, with the original arguments | |
9696 | following. Consult the Unix man page for the `exec' system call | |
9697 | for more information. | |
9698 | ||
1a1945be JB |
9699 | Now you can use Guile as an interpreter, using a mechanism which is a |
9700 | compatible subset of that provided by SCSH. | |
9701 | ||
3065a62a JB |
9702 | Guile now recognizes a '-s' command line switch, whose argument is the |
9703 | name of a file of Scheme code to load. It also treats the two | |
9704 | characters `#!' as the start of a comment, terminated by `!#'. Thus, | |
9705 | to make a file of Scheme code directly executable by Unix, insert the | |
9706 | following two lines at the top of the file: | |
9707 | ||
9708 | #!/usr/local/bin/guile -s | |
9709 | !# | |
9710 | ||
9711 | Guile treats the argument of the `-s' command-line switch as the name | |
9712 | of a file of Scheme code to load, and treats the sequence `#!' as the | |
9713 | start of a block comment, terminated by `!#'. | |
9714 | ||
9715 | For example, here's a version of 'echo' written in Scheme: | |
9716 | ||
9717 | #!/usr/local/bin/guile -s | |
9718 | !# | |
9719 | (let loop ((args (cdr (program-arguments)))) | |
9720 | (if (pair? args) | |
9721 | (begin | |
9722 | (display (car args)) | |
9723 | (if (pair? (cdr args)) | |
9724 | (display " ")) | |
9725 | (loop (cdr args))))) | |
9726 | (newline) | |
9727 | ||
9728 | Why does `#!' start a block comment terminated by `!#', instead of the | |
9729 | end of the line? That is the notation SCSH uses, and although we | |
9730 | don't yet support the other SCSH features that motivate that choice, | |
9731 | we would like to be backward-compatible with any existing Guile | |
3763761c JB |
9732 | scripts once we do. Furthermore, if the path to Guile on your system |
9733 | is too long for your kernel, you can start the script with this | |
9734 | horrible hack: | |
9735 | ||
9736 | #!/bin/sh | |
9737 | exec /really/long/path/to/guile -s "$0" ${1+"$@"} | |
9738 | !# | |
3065a62a JB |
9739 | |
9740 | Note that some very old Unix systems don't support the `#!' syntax. | |
9741 | ||
c6486f8a | 9742 | |
4b521edb | 9743 | ** You can now run Guile without installing it. |
6685dc83 JB |
9744 | |
9745 | Previous versions of the interactive Guile interpreter (`guile') | |
9746 | couldn't start up unless Guile's Scheme library had been installed; | |
9747 | they used the value of the environment variable `SCHEME_LOAD_PATH' | |
9748 | later on in the startup process, but not to find the startup code | |
9749 | itself. Now Guile uses `SCHEME_LOAD_PATH' in all searches for Scheme | |
9750 | code. | |
9751 | ||
9752 | To run Guile without installing it, build it in the normal way, and | |
9753 | then set the environment variable `SCHEME_LOAD_PATH' to a | |
9754 | colon-separated list of directories, including the top-level directory | |
9755 | of the Guile sources. For example, if you unpacked Guile so that the | |
9756 | full filename of this NEWS file is /home/jimb/guile-1.0b3/NEWS, then | |
9757 | you might say | |
9758 | ||
9759 | export SCHEME_LOAD_PATH=/home/jimb/my-scheme:/home/jimb/guile-1.0b3 | |
9760 | ||
c6486f8a | 9761 | |
4b521edb JB |
9762 | ** Guile's read-eval-print loop no longer prints #<unspecified> |
9763 | results. If the user wants to see this, she can evaluate the | |
9764 | expression (assert-repl-print-unspecified #t), perhaps in her startup | |
48d224d7 | 9765 | file. |
6685dc83 | 9766 | |
4b521edb JB |
9767 | ** Guile no longer shows backtraces by default when an error occurs; |
9768 | however, it does display a message saying how to get one, and how to | |
9769 | request that they be displayed by default. After an error, evaluate | |
9770 | (backtrace) | |
9771 | to see a backtrace, and | |
9772 | (debug-enable 'backtrace) | |
9773 | to see them by default. | |
6685dc83 | 9774 | |
6685dc83 | 9775 | |
d9fb83d9 | 9776 | |
4b521edb JB |
9777 | * Changes to Guile Scheme: |
9778 | ||
9779 | ** Guile now distinguishes between #f and the empty list. | |
9780 | ||
9781 | This is for compatibility with the IEEE standard, the (possibly) | |
9782 | upcoming Revised^5 Report on Scheme, and many extant Scheme | |
9783 | implementations. | |
9784 | ||
9785 | Guile used to have #f and '() denote the same object, to make Scheme's | |
9786 | type system more compatible with Emacs Lisp's. However, the change | |
9787 | caused too much trouble for Scheme programmers, and we found another | |
9788 | way to reconcile Emacs Lisp with Scheme that didn't require this. | |
9789 | ||
9790 | ||
9791 | ** Guile's delq, delv, delete functions, and their destructive | |
c6486f8a JB |
9792 | counterparts, delq!, delv!, and delete!, now remove all matching |
9793 | elements from the list, not just the first. This matches the behavior | |
9794 | of the corresponding Emacs Lisp functions, and (I believe) the Maclisp | |
9795 | functions which inspired them. | |
9796 | ||
9797 | I recognize that this change may break code in subtle ways, but it | |
9798 | seems best to make the change before the FSF's first Guile release, | |
9799 | rather than after. | |
9800 | ||
9801 | ||
4b521edb | 9802 | ** The compiled-library-path function has been deleted from libguile. |
6685dc83 | 9803 | |
4b521edb | 9804 | ** The facilities for loading Scheme source files have changed. |
c6486f8a | 9805 | |
4b521edb | 9806 | *** The variable %load-path now tells Guile which directories to search |
6685dc83 JB |
9807 | for Scheme code. Its value is a list of strings, each of which names |
9808 | a directory. | |
9809 | ||
4b521edb JB |
9810 | *** The variable %load-extensions now tells Guile which extensions to |
9811 | try appending to a filename when searching the load path. Its value | |
9812 | is a list of strings. Its default value is ("" ".scm"). | |
9813 | ||
9814 | *** (%search-load-path FILENAME) searches the directories listed in the | |
9815 | value of the %load-path variable for a Scheme file named FILENAME, | |
9816 | with all the extensions listed in %load-extensions. If it finds a | |
9817 | match, then it returns its full filename. If FILENAME is absolute, it | |
9818 | returns it unchanged. Otherwise, it returns #f. | |
6685dc83 | 9819 | |
4b521edb JB |
9820 | %search-load-path will not return matches that refer to directories. |
9821 | ||
9822 | *** (primitive-load FILENAME :optional CASE-INSENSITIVE-P SHARP) | |
9823 | uses %seach-load-path to find a file named FILENAME, and loads it if | |
9824 | it finds it. If it can't read FILENAME for any reason, it throws an | |
9825 | error. | |
6685dc83 JB |
9826 | |
9827 | The arguments CASE-INSENSITIVE-P and SHARP are interpreted as by the | |
4b521edb JB |
9828 | `read' function. |
9829 | ||
9830 | *** load uses the same searching semantics as primitive-load. | |
9831 | ||
9832 | *** The functions %try-load, try-load-with-path, %load, load-with-path, | |
9833 | basic-try-load-with-path, basic-load-with-path, try-load-module-with- | |
9834 | path, and load-module-with-path have been deleted. The functions | |
9835 | above should serve their purposes. | |
9836 | ||
9837 | *** If the value of the variable %load-hook is a procedure, | |
9838 | `primitive-load' applies its value to the name of the file being | |
9839 | loaded (without the load path directory name prepended). If its value | |
9840 | is #f, it is ignored. Otherwise, an error occurs. | |
9841 | ||
9842 | This is mostly useful for printing load notification messages. | |
9843 | ||
9844 | ||
9845 | ** The function `eval!' is no longer accessible from the scheme level. | |
9846 | We can't allow operations which introduce glocs into the scheme level, | |
9847 | because Guile's type system can't handle these as data. Use `eval' or | |
9848 | `read-and-eval!' (see below) as replacement. | |
9849 | ||
9850 | ** The new function read-and-eval! reads an expression from PORT, | |
9851 | evaluates it, and returns the result. This is more efficient than | |
9852 | simply calling `read' and `eval', since it is not necessary to make a | |
9853 | copy of the expression for the evaluator to munge. | |
9854 | ||
9855 | Its optional arguments CASE_INSENSITIVE_P and SHARP are interpreted as | |
9856 | for the `read' function. | |
9857 | ||
9858 | ||
9859 | ** The function `int?' has been removed; its definition was identical | |
9860 | to that of `integer?'. | |
9861 | ||
9862 | ** The functions `<?', `<?', `<=?', `=?', `>?', and `>=?'. Code should | |
9863 | use the R4RS names for these functions. | |
9864 | ||
9865 | ** The function object-properties no longer returns the hash handle; | |
9866 | it simply returns the object's property list. | |
9867 | ||
9868 | ** Many functions have been changed to throw errors, instead of | |
9869 | returning #f on failure. The point of providing exception handling in | |
9870 | the language is to simplify the logic of user code, but this is less | |
9871 | useful if Guile's primitives don't throw exceptions. | |
9872 | ||
9873 | ** The function `fileno' has been renamed from `%fileno'. | |
9874 | ||
9875 | ** The function primitive-mode->fdes returns #t or #f now, not 1 or 0. | |
9876 | ||
9877 | ||
9878 | * Changes to Guile's C interface: | |
9879 | ||
9880 | ** The library's initialization procedure has been simplified. | |
9881 | scm_boot_guile now has the prototype: | |
9882 | ||
9883 | void scm_boot_guile (int ARGC, | |
9884 | char **ARGV, | |
9885 | void (*main_func) (), | |
9886 | void *closure); | |
9887 | ||
9888 | scm_boot_guile calls MAIN_FUNC, passing it CLOSURE, ARGC, and ARGV. | |
9889 | MAIN_FUNC should do all the work of the program (initializing other | |
9890 | packages, reading user input, etc.) before returning. When MAIN_FUNC | |
9891 | returns, call exit (0); this function never returns. If you want some | |
9892 | other exit value, MAIN_FUNC may call exit itself. | |
9893 | ||
9894 | scm_boot_guile arranges for program-arguments to return the strings | |
9895 | given by ARGC and ARGV. If MAIN_FUNC modifies ARGC/ARGV, should call | |
9896 | scm_set_program_arguments with the final list, so Scheme code will | |
9897 | know which arguments have been processed. | |
9898 | ||
9899 | scm_boot_guile establishes a catch-all catch handler which prints an | |
9900 | error message and exits the process. This means that Guile exits in a | |
9901 | coherent way when system errors occur and the user isn't prepared to | |
9902 | handle it. If the user doesn't like this behavior, they can establish | |
9903 | their own universal catcher in MAIN_FUNC to shadow this one. | |
9904 | ||
9905 | Why must the caller do all the real work from MAIN_FUNC? The garbage | |
9906 | collector assumes that all local variables of type SCM will be above | |
9907 | scm_boot_guile's stack frame on the stack. If you try to manipulate | |
9908 | SCM values after this function returns, it's the luck of the draw | |
9909 | whether the GC will be able to find the objects you allocate. So, | |
9910 | scm_boot_guile function exits, rather than returning, to discourage | |
9911 | people from making that mistake. | |
9912 | ||
9913 | The IN, OUT, and ERR arguments were removed; there are other | |
9914 | convenient ways to override these when desired. | |
9915 | ||
9916 | The RESULT argument was deleted; this function should never return. | |
9917 | ||
9918 | The BOOT_CMD argument was deleted; the MAIN_FUNC argument is more | |
9919 | general. | |
9920 | ||
9921 | ||
9922 | ** Guile's header files should no longer conflict with your system's | |
9923 | header files. | |
9924 | ||
9925 | In order to compile code which #included <libguile.h>, previous | |
9926 | versions of Guile required you to add a directory containing all the | |
9927 | Guile header files to your #include path. This was a problem, since | |
9928 | Guile's header files have names which conflict with many systems' | |
9929 | header files. | |
9930 | ||
9931 | Now only <libguile.h> need appear in your #include path; you must | |
9932 | refer to all Guile's other header files as <libguile/mumble.h>. | |
9933 | Guile's installation procedure puts libguile.h in $(includedir), and | |
9934 | the rest in $(includedir)/libguile. | |
9935 | ||
9936 | ||
9937 | ** Two new C functions, scm_protect_object and scm_unprotect_object, | |
9938 | have been added to the Guile library. | |
9939 | ||
9940 | scm_protect_object (OBJ) protects OBJ from the garbage collector. | |
9941 | OBJ will not be freed, even if all other references are dropped, | |
9942 | until someone does scm_unprotect_object (OBJ). Both functions | |
9943 | return OBJ. | |
9944 | ||
9945 | Note that calls to scm_protect_object do not nest. You can call | |
9946 | scm_protect_object any number of times on a given object, and the | |
9947 | next call to scm_unprotect_object will unprotect it completely. | |
9948 | ||
9949 | Basically, scm_protect_object and scm_unprotect_object just | |
9950 | maintain a list of references to things. Since the GC knows about | |
9951 | this list, all objects it mentions stay alive. scm_protect_object | |
9952 | adds its argument to the list; scm_unprotect_object remove its | |
9953 | argument from the list. | |
9954 | ||
9955 | ||
9956 | ** scm_eval_0str now returns the value of the last expression | |
9957 | evaluated. | |
9958 | ||
9959 | ** The new function scm_read_0str reads an s-expression from a | |
9960 | null-terminated string, and returns it. | |
9961 | ||
9962 | ** The new function `scm_stdio_to_port' converts a STDIO file pointer | |
9963 | to a Scheme port object. | |
9964 | ||
9965 | ** The new function `scm_set_program_arguments' allows C code to set | |
e80c8fea | 9966 | the value returned by the Scheme `program-arguments' function. |
6685dc83 | 9967 | |
6685dc83 | 9968 | \f |
1a1945be JB |
9969 | Older changes: |
9970 | ||
9971 | * Guile no longer includes sophisticated Tcl/Tk support. | |
9972 | ||
9973 | The old Tcl/Tk support was unsatisfying to us, because it required the | |
9974 | user to link against the Tcl library, as well as Tk and Guile. The | |
9975 | interface was also un-lispy, in that it preserved Tcl/Tk's practice of | |
9976 | referring to widgets by names, rather than exporting widgets to Scheme | |
9977 | code as a special datatype. | |
9978 | ||
9979 | In the Usenix Tk Developer's Workshop held in July 1996, the Tcl/Tk | |
9980 | maintainers described some very interesting changes in progress to the | |
9981 | Tcl/Tk internals, which would facilitate clean interfaces between lone | |
9982 | Tk and other interpreters --- even for garbage-collected languages | |
9983 | like Scheme. They expected the new Tk to be publicly available in the | |
9984 | fall of 1996. | |
9985 | ||
9986 | Since it seems that Guile might soon have a new, cleaner interface to | |
9987 | lone Tk, and that the old Guile/Tk glue code would probably need to be | |
9988 | completely rewritten, we (Jim Blandy and Richard Stallman) have | |
9989 | decided not to support the old code. We'll spend the time instead on | |
9990 | a good interface to the newer Tk, as soon as it is available. | |
5c54da76 | 9991 | |
8512dea6 | 9992 | Until then, gtcltk-lib provides trivial, low-maintenance functionality. |
deb95d71 | 9993 | |
5c54da76 JB |
9994 | \f |
9995 | Copyright information: | |
9996 | ||
4f416616 | 9997 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2006 Free Software Foundation, Inc. |
5c54da76 JB |
9998 | |
9999 | Permission is granted to anyone to make or distribute verbatim copies | |
10000 | of this document as received, in any medium, provided that the | |
10001 | copyright notice and this permission notice are preserved, | |
10002 | thus giving the recipient permission to redistribute in turn. | |
10003 | ||
10004 | Permission is granted to distribute modified versions | |
10005 | of this document, or of portions of it, | |
10006 | under the above conditions, provided also that they | |
10007 | carry prominent notices stating who last changed them. | |
10008 | ||
48d224d7 JB |
10009 | \f |
10010 | Local variables: | |
10011 | mode: outline | |
10012 | paragraph-separate: "[ \f]*$" | |
10013 | end: |