\f
Changes since the stable branch:
+* Changes to the standalone interpreter
+
+** New command line option `--no-debug'.
+
+Specifying `--no-debug' on the command line will keep the debugging
+evaluator turned off, even for interactive sessions.
+
+** User-init file ~/.guile is now loaded with the debugging evaluator.
+
+Previously, the normal evaluator would have been used. Using the
+debugging evaluator gives better error messages.
+
+* Changes to Scheme functions and syntax
+
+** New function 'unsetenv'.
+
+** There is support for Infinity and NaNs.
+
+Following PLT Scheme, Guile can now work with infinite numbers, and
+'not-a-numbers'.
+
+There is new syntax for numbers: "+inf.0" (infinity), "-inf.0"
+(negative infinity), "+nan.0" (not-a-number), and "-nan.0" (same as
+"+nan.0"). These numbers are inexact and have no exact counterpart.
+
+Dividing by an inexact zero returns +inf.0 or -inf.0, depending on the
+sign of the dividend. The infinities are integers, and they answer #t
+for both 'even?' and 'odd?'. The +nan.0 value is not an integer and is
+not '=' to itself, but '+nan.0' is 'eqv?' to itself.
+
+For example
+
+ (/ 1 0.0)
+ => +inf.0
+
+ (/ 0 0.0)
+ => +nan.0
+
+ (/ 0)
+ ERROR: Numerical overflow
+
+Two new predicates 'inf?' and 'nan?' can be used to test for the
+special values.
+
+** Inexact zero can have a sign.
+
+Guile can now distinguish between plus and minus inexact zero, if your
+platform supports this, too. The two zeros are equal according to
+'=', but not according to 'eqv?'. For example
+
+ (- 0.0)
+ => -0.0
+
+ (= 0.0 (- 0.0))
+ => #t
+
+ (eqv? 0.0 (- 0.0))
+ => #f
+
+** We now have uninterned symbols.
+
+The new function 'make-symbol' will return a uninterned symbol. This
+is a symbol that is unique and is guaranteed to remain unique.
+However, uninterned symbols can not yet be read back in.
+
+Use the new function 'symbol-interned?' to check whether a symbol is
+interned or not.
+
+** pretty-print has more options.
+
+The function pretty-print from the (ice-9 pretty-print) module can now
+also be invoked with keyword arguments that control things like
+maximum output width. See its online documentation.
+
** Variables have no longer a special behavior for `equal?'.
Previously, comparing two variables with `equal?' would recursivly
You can now use an empty `begin' form. It will yield #<unspecified>
when evaluated and simply be ignored in a definition context.
+** Removed: substring-move-left!, substring-move-right!
+
+Use `substring-move!' instead.
+
+** Deprecated: procedure->macro
+
+Change your code to use either procedure->memoizing-macro or, probably better,
+to use r5rs macros. Also, be aware that macro expansion will not be done
+during evaluation, but prior to evaluation.
+
* Changes to the C interface
+** The SCM_VELTS macros now returns a read-only vector. For writing,
+use the new macros SCM_WRITABLE_VELTS, SCM_SET_VECTOR_LENGTH. The use
+of SCM_WRITABLE_VELTS is discouraged, though.
+
+** Garbage collector rewrite.
+
+The garbage collector is cleaned up a lot, and now uses lazy
+sweeping. This is reflected in the output of (gc-stats); since cells
+are being freed when they are allocated, the cells-allocated field
+stays roughly constant.
+
+For malloc related triggers, the behavior is changed. It uses the same
+heuristic as the cell-triggered collections. It may be tuned with the
+environment variables GUILE_MIN_YIELD_MALLOC. This is the percentage
+for minimum yield of malloc related triggers. The default is 40.
+GUILE_INIT_MALLOC_LIMIT sets the initial trigger for doing a GC. The
+default is 200 kb.
+
+Debugging operations for the freelist have been deprecated, along with
+the C variables that control garbage collection. The environment
+variables GUILE_MAX_SEGMENT_SIZE, GUILE_INIT_SEGMENT_SIZE_2,
+GUILE_INIT_SEGMENT_SIZE_1, and GUILE_MIN_YIELD_2 should be used.
+
+** The struct scm_cell has been renamed to scm_t_cell
+
+This is in accordance to Guile's naming scheme for types. Note that
+the name scm_cell is now used for a function that allocates and
+initializes a new cell (see below).
+
+** New functions for memory management
+
+A new set of functions for memory management has been added since the
+old way (scm_must_malloc, scm_must_free, etc) was error prone and
+indeed, Guile itself contained some long standing bugs that could
+cause aborts in long running programs.
+
+The new functions are more symmetrical and do not need cooperation
+from smob free routines, among other improvements.
+
+The new functions are scm_malloc, scm_realloc, scm_calloc, scm_strdup,
+scm_strndup, scm_gc_malloc, scm_gc_calloc, scm_gc_realloc,
+scm_gc_free, scm_gc_register_collectable_memory, and
+scm_gc_unregister_collectable_memory. Refer to the manual for more
+details and for upgrading instructions.
+
+The old functions for memory management have been deprecated. They
+are: scm_must_malloc, scm_must_realloc, scm_must_free,
+scm_must_strdup, scm_must_strndup, scm_done_malloc, scm_done_free.
+
** New function: scm_str2string
This function creates a scheme string from a 0-terminated C string. The input
common of which is just "extern" for Unix platforms. On Win32, it can
be used to control which symbols are exported from a DLL.
-If you `#define __SCM_IMPORT__' before including <libguile.h>, SCM_API
+If you `#define SCM_IMPORT' before including <libguile.h>, SCM_API
will expand into "__declspec (dllimport) extern", which is needed for
linking to the Guile DLL in Windows.
-There are also __SCM_RL_IMPORT__, __SCM_SRFI1314_IMPORT__, and
-__SCM_SRFI4_IMPORT__, for the corresponding libraries.
+There are also SCM_RL_IMPORT, QT_IMPORT, SCM_SRFI1314_IMPORT, and
+SCM_SRFI4_IMPORT, for the corresponding libraries.
+
+** SCM_NEWCELL and SCM_NEWCELL2 have been deprecated.
+
+Use the new functions scm_cell and scm_double_cell instead. The old macros
+had problems because with them allocation and initialization was separated and
+the GC could sometimes observe half initialized cells. Only careful coding by
+the user of SCM_NEWCELL and SCM_NEWCELL2 could make this safe and efficient.
+
+** CHECK_ENTRY, CHECK_APPLY and CHECK_EXIT have been deprecated.
+
+Use the variables scm_check_entry_p, scm_check_apply_p and scm_check_exit_p
+instead.
+
+** SRCBRKP has been deprecated.
+
+Use scm_c_source_property_breakpoint_p instead.
+
+** Deprecated: scm_makmacro
+
+Change your code to use either scm_makmmacro or, probably better, to use r5rs
+macros. Also, be aware that macro expansion will not be done during
+evaluation, but prior to evaluation.
+
+** Removed from scm_root_state: def_inp, def_outp, def_errp, together
+with corresponding macros scm_def_inp, scm_def_outp and scm_def_errp.
+These were undocumented and unused copies of the standard ports at the
+time that Guile was initialised. Normally the current ports should be
+used instead, obtained from scm_current_input_port () etc. If an
+application needs to retain earlier ports, it should save them in a
+gc-protected location.
+
+** Removed compile time option MEMOIZE_LOCALS
+
+Now, caching of local variable positions during memoization is mandatory.
+However, the option to disable the caching has most probably not been used
+anyway.
+
+** Removed compile time option SCM_RECKLESS
+
+Full number of arguments checking of closures is mandatory now. However, the
+option to disable the checking has most probably not been used anyway.
+
+** Removed compile time option SCM_CAUTIOUS
+
+Full number of arguments checking of closures is mandatory now. However, the
+option to disable the checking has most probably not been used anyway.
+
+** Removed definitions: scm_lisp_nil, scm_lisp_t, s_nil_ify, scm_m_nil_ify,
+s_t_ify, scm_m_t_ify, s_0_cond, scm_m_0_cond, s_0_ify, scm_m_0_ify, s_1_ify,
+scm_m_1_ify, scm_debug_newcell, scm_debug_newcell2, scm_tc16_allocated,
+SCM_SET_SYMBOL_HASH, SCM_IM_NIL_IFY, SCM_IM_T_IFY, SCM_IM_0_COND,
+SCM_IM_0_IFY, SCM_IM_1_IFY, SCM_GC_SET_ALLOCATED, scm_debug_newcell,
+scm_debug_newcell2, scm_substring_move_left_x, scm_substring_move_right_x,
+long_long, ulong_long, scm_sizet, SCM_WNA, SCM_OUTOFRANGE, SCM_NALLOC,
+SCM_HUP_SIGNAL, SCM_INT_SIGNAL, SCM_FPE_SIGNAL, SCM_BUS_SIGNAL,
+SCM_SEGV_SIGNAL, SCM_ALRM_SIGNAL, SCM_GC_SIGNAL, SCM_TICK_SIGNAL,
+SCM_SIG_ORD, SCM_ORD_SIG, SCM_NUM_SIGS, moddata, registered_mods,
+scm_register_module_xxx, scm_registered_modules,
+scm_clear_registered_modules, scm_wta, *top-level-lookup-closure*,
+scm_top_level_lookup_closure_var, scm_system_transformer, scm_eval_3,
+scm_eval2, SCM_SETAND_CAR, SCM_SETOR_CAR, SCM_SETAND_CDR, SCM_SETOR_CDR,
+SCM_FREEP, SCM_NFREEP, SCM_GC8MARKP, SCM_SETGC8MARK, SCM_CLRGC8MARK,
+SCM_GCTYP16, SCM_GCCDR, scm_remember, scm_protect_object,
+scm_unprotect_object, root_module_lookup_closure, scm_sym_app,
+scm_sym_modules, module_prefix, make_modules_in_var,
+beautify_user_module_x_var, try_module_autoload_var, scm_module_full_name,
+scm_the_root_module, scm_make_module, scm_ensure_user_module,
+scm_load_scheme_module, scm_port, scm_ptob_descriptor, scm_port_rw_active,
+scm_close_all_ports_except, scm_rstate, scm_rng, scm_i_rstate,
+SCM_SLOPPY_STRINGP, SCM_RWSTRINGP, SCM_STRING_UCHARS, SCM_STRING_CHARS,
+scm_read_only_string_p, scm_makstr, scm_makfromstr,
+scm_make_shared_substring, scm_tc7_substring, SCM_SLOPPY_CONSP,
+SCM_SLOPPY_NCONSP, scm_tc7_ssymbol, scm_tc7_msymbol, scm_tcs_symbols,
+sym_huh, scm_variable_set_name_hint, scm_builtin_variable, SCM_VARVCELL,
+SCM_UDVARIABLEP, SCM_DEFVARIABLEP, scm_internal_with_fluids,
+scm_make_gsubr, scm_make_gsubr_with_generic, scm_create_hook, list*,
+SCM_LIST0, SCM_LIST1, SCM_LIST2, SCM_LIST3, SCM_LIST4, SCM_LIST5,
+SCM_LIST6, SCM_LIST7, SCM_LIST8, SCM_LIST9, scm_listify, scm_sloppy_memq,
+scm_sloppy_memv, scm_sloppy_member, scm_end_of_file_key,
+scm_read_and_eval_x, scm_mkbig, scm_big2inum, scm_adjbig, scm_normbig,
+scm_copybig, scm_2ulong2big, scm_dbl2big, scm_big2dbl, SCM_FIXNUM_BIT,
+scm_subr_entry, SCM_SUBR_DOC, scm_make_subr_opt, scm_make_subr,
+scm_make_subr_with_generic, setjmp_type, setjmp_type,
+scm_call_catching_errors, scm_make_smob_type_mfpe, scm_set_smob_mfpe,
+scm_strprint_obj, scm_read_0str, scm_eval_0str, SCM_CHARS, SCM_UCHARS,
+SCM_SETCHARS, SCM_SLOPPY_SUBSTRP, SCM_SUBSTR_STR, SCM_SUBSTR_OFFSET,
+SCM_LENGTH_MAX, SCM_LENGTH, SCM_SETLENGTH, SCM_ROSTRINGP, SCM_ROLENGTH,
+SCM_ROCHARS, SCM_ROUCHARS, SCM_SUBSTRP, SCM_COERCE_SUBSTR, scm_strhash,
+scm_sym2vcell, scm_sym2ovcell_soft, scm_sym2ovcell,
+scm_intern_obarray_soft, scm_intern_obarray, scm_intern, scm_intern0,
+scm_sysintern, scm_sysintern0, scm_sysintern0_no_module_lookup,
+scm_symbol_value0, scm_string_to_obarray_symbol, scm_intern_symbol,
+scm_unintern_symbol, scm_symbol_binding, scm_symbol_interned_p,
+scm_symbol_bound_p, scm_symbol_set_x, scm_gentemp,
+scm_init_symbols_deprecated, s_vector_set_length_x, scm_vector_set_length_x,
+scm_contregs, scm_debug_info, scm_debug_frame, SCM_DSIDEVAL, SCM_OPDIRP,
+scm_fport, scm_option, SCM_CONST_LONG, SCM_VCELL, SCM_GLOBAL_VCELL,
+SCM_VCELL_INIT, SCM_GLOBAL_VCELL_INIT, scm_srcprops, scm_srcprops_chunk,
+scm_info_frame, scm_stack, scm_array, scm_array_dim, SCM_ARRAY_CONTIGUOUS,
+SCM_HUGE_LENGTH, SCM_FUNC_NAME, SCM_WTA, RETURN_SCM_WTA,
+SCM_VALIDATE_NUMBER_COPY, SCM_VALIDATE_NUMBER_DEF_COPY,
+SCM_VALIDATE_STRINGORSUBSTR, SCM_VALIDATE_ROSTRING,
+SCM_VALIDATE_ROSTRING_COPY, SCM_VALIDATE_NULLORROSTRING_COPY,
+SCM_VALIDATE_RWSTRING, SCM_VALIDATE_OPDIR, DIGITS, scm_small_istr2int,
+scm_istr2int, scm_istr2flo, scm_istring2number, scm_istr2int,
+scm_istr2flo, scm_istring2number, scm_vtable_index_vcell, scm_si_vcell,
+SCM_ECONSP, SCM_NECONSP, SCM_GLOC_VAR, SCM_GLOC_VAL, SCM_GLOC_SET_VAL,
+SCM_GLOC_VAL_LOC, scm_make_gloc, scm_gloc_p, scm_tc16_variable
Changes since Guile 1.4:
In addition, ./GUILE-VERSION now defines GUILE_MICRO_VERSION.
+** New preprocessor definitions are available for checking versions.
+
+version.h now #defines SCM_MAJOR_VERSION, SCM_MINOR_VERSION, and
+SCM_MICRO_VERSION to the appropriate integer values.
+
** Guile now actively warns about deprecated features.
The new configure option `--enable-deprecated=LEVEL' and the
HCoop / bpt / guile.git / blobdiff