| 1 | ;;; -*- mode: scheme; coding: utf-8; -*- |
| 2 | |
| 3 | ;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 |
| 4 | ;;;; Free Software Foundation, Inc. |
| 5 | ;;;; |
| 6 | ;;;; This library is free software; you can redistribute it and/or |
| 7 | ;;;; modify it under the terms of the GNU Lesser General Public |
| 8 | ;;;; License as published by the Free Software Foundation; either |
| 9 | ;;;; version 3 of the License, or (at your option) any later version. |
| 10 | ;;;; |
| 11 | ;;;; This library is distributed in the hope that it will be useful, |
| 12 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | ;;;; Lesser General Public License for more details. |
| 15 | ;;;; |
| 16 | ;;;; You should have received a copy of the GNU Lesser General Public |
| 17 | ;;;; License along with this library; if not, write to the Free Software |
| 18 | ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | ;;;; |
| 20 | |
| 21 | \f |
| 22 | |
| 23 | ;;; Commentary: |
| 24 | |
| 25 | ;;; This file is the first thing loaded into Guile. It adds many mundane |
| 26 | ;;; definitions and a few that are interesting. |
| 27 | ;;; |
| 28 | ;;; The module system (hence the hierarchical namespace) are defined in this |
| 29 | ;;; file. |
| 30 | ;;; |
| 31 | |
| 32 | ;;; Code: |
| 33 | |
| 34 | \f |
| 35 | |
| 36 | ;; Before compiling, make sure any symbols are resolved in the (guile) |
| 37 | ;; module, the primary location of those symbols, rather than in |
| 38 | ;; (guile-user), the default module that we compile in. |
| 39 | |
| 40 | (eval-when (compile) |
| 41 | (set-current-module (resolve-module '(guile)))) |
| 42 | |
| 43 | \f |
| 44 | |
| 45 | ;;; {Error handling} |
| 46 | ;;; |
| 47 | |
| 48 | ;; Define delimited continuation operators, and implement catch and throw in |
| 49 | ;; terms of them. |
| 50 | |
| 51 | (define make-prompt-tag |
| 52 | (lambda* (#:optional (stem "prompt")) |
| 53 | (gensym stem))) |
| 54 | |
| 55 | (define default-prompt-tag |
| 56 | ;; not sure if we should expose this to the user as a fluid |
| 57 | (let ((%default-prompt-tag (make-prompt-tag))) |
| 58 | (lambda () |
| 59 | %default-prompt-tag))) |
| 60 | |
| 61 | (define (call-with-prompt tag thunk handler) |
| 62 | (@prompt tag (thunk) handler)) |
| 63 | (define (abort-to-prompt tag . args) |
| 64 | (@abort tag args)) |
| 65 | |
| 66 | |
| 67 | ;; Define catch and with-throw-handler, using some common helper routines and a |
| 68 | ;; shared fluid. Hide the helpers in a lexical contour. |
| 69 | |
| 70 | (let () |
| 71 | ;; Ideally we'd like to be able to give these default values for all threads, |
| 72 | ;; even threads not created by Guile; but alack, that does not currently seem |
| 73 | ;; possible. So wrap the getters in thunks. |
| 74 | (define %running-exception-handlers (make-fluid)) |
| 75 | (define %exception-handler (make-fluid)) |
| 76 | |
| 77 | (define (running-exception-handlers) |
| 78 | (or (fluid-ref %running-exception-handlers) |
| 79 | (begin |
| 80 | (fluid-set! %running-exception-handlers '()) |
| 81 | '()))) |
| 82 | (define (exception-handler) |
| 83 | (or (fluid-ref %exception-handler) |
| 84 | (begin |
| 85 | (fluid-set! %exception-handler default-exception-handler) |
| 86 | default-exception-handler))) |
| 87 | |
| 88 | (define (default-exception-handler k . args) |
| 89 | (cond |
| 90 | ((eq? k 'quit) |
| 91 | (primitive-exit (cond |
| 92 | ((not (pair? args)) 0) |
| 93 | ((integer? (car args)) (car args)) |
| 94 | ((not (car args)) 1) |
| 95 | (else 0)))) |
| 96 | (else |
| 97 | (format (current-error-port) "guile: uncaught throw to ~a: ~a\n" k args) |
| 98 | (primitive-exit 1)))) |
| 99 | |
| 100 | (define (default-throw-handler prompt-tag catch-k) |
| 101 | (let ((prev (exception-handler))) |
| 102 | (lambda (thrown-k . args) |
| 103 | (if (or (eq? thrown-k catch-k) (eqv? catch-k #t)) |
| 104 | (apply abort-to-prompt prompt-tag thrown-k args) |
| 105 | (apply prev thrown-k args))))) |
| 106 | |
| 107 | (define (custom-throw-handler prompt-tag catch-k pre) |
| 108 | (let ((prev (exception-handler))) |
| 109 | (lambda (thrown-k . args) |
| 110 | (if (or (eq? thrown-k catch-k) (eqv? catch-k #t)) |
| 111 | (let ((running (running-exception-handlers))) |
| 112 | (with-fluids ((%running-exception-handlers (cons pre running))) |
| 113 | (if (not (memq pre running)) |
| 114 | (apply pre thrown-k args)) |
| 115 | ;; fall through |
| 116 | (if prompt-tag |
| 117 | (apply abort-to-prompt prompt-tag thrown-k args) |
| 118 | (apply prev thrown-k args)))) |
| 119 | (apply prev thrown-k args))))) |
| 120 | |
| 121 | (define! 'catch |
| 122 | (lambda* (k thunk handler #:optional pre-unwind-handler) |
| 123 | "Invoke @var{thunk} in the dynamic context of @var{handler} for |
| 124 | exceptions matching @var{key}. If thunk throws to the symbol |
| 125 | @var{key}, then @var{handler} is invoked this way: |
| 126 | @lisp |
| 127 | (handler key args ...) |
| 128 | @end lisp |
| 129 | |
| 130 | @var{key} is a symbol or @code{#t}. |
| 131 | |
| 132 | @var{thunk} takes no arguments. If @var{thunk} returns |
| 133 | normally, that is the return value of @code{catch}. |
| 134 | |
| 135 | Handler is invoked outside the scope of its own @code{catch}. |
| 136 | If @var{handler} again throws to the same key, a new handler |
| 137 | from further up the call chain is invoked. |
| 138 | |
| 139 | If the key is @code{#t}, then a throw to @emph{any} symbol will |
| 140 | match this call to @code{catch}. |
| 141 | |
| 142 | If a @var{pre-unwind-handler} is given and @var{thunk} throws |
| 143 | an exception that matches @var{key}, Guile calls the |
| 144 | @var{pre-unwind-handler} before unwinding the dynamic state and |
| 145 | invoking the main @var{handler}. @var{pre-unwind-handler} should |
| 146 | be a procedure with the same signature as @var{handler}, that |
| 147 | is @code{(lambda (key . args))}. It is typically used to save |
| 148 | the stack at the point where the exception occurred, but can also |
| 149 | query other parts of the dynamic state at that point, such as |
| 150 | fluid values. |
| 151 | |
| 152 | A @var{pre-unwind-handler} can exit either normally or non-locally. |
| 153 | If it exits normally, Guile unwinds the stack and dynamic context |
| 154 | and then calls the normal (third argument) handler. If it exits |
| 155 | non-locally, that exit determines the continuation." |
| 156 | (if (not (or (symbol? k) (eqv? k #t))) |
| 157 | (scm-error "catch" 'wrong-type-arg |
| 158 | "Wrong type argument in position ~a: ~a" |
| 159 | (list 1 k) (list k))) |
| 160 | (let ((tag (make-prompt-tag "catch"))) |
| 161 | (call-with-prompt |
| 162 | tag |
| 163 | (lambda () |
| 164 | (with-fluids |
| 165 | ((%exception-handler |
| 166 | (if pre-unwind-handler |
| 167 | (custom-throw-handler tag k pre-unwind-handler) |
| 168 | (default-throw-handler tag k)))) |
| 169 | (thunk))) |
| 170 | (lambda (cont k . args) |
| 171 | (apply handler k args)))))) |
| 172 | |
| 173 | (define! 'with-throw-handler |
| 174 | (lambda (k thunk pre-unwind-handler) |
| 175 | "Add @var{handler} to the dynamic context as a throw handler |
| 176 | for key @var{key}, then invoke @var{thunk}." |
| 177 | (if (not (or (symbol? k) (eqv? k #t))) |
| 178 | (scm-error "with-throw-handler" 'wrong-type-arg |
| 179 | "Wrong type argument in position ~a: ~a" |
| 180 | (list 1 k) (list k))) |
| 181 | (with-fluids ((%exception-handler |
| 182 | (custom-throw-handler #f k pre-unwind-handler))) |
| 183 | (thunk)))) |
| 184 | |
| 185 | (define! 'throw |
| 186 | (lambda (key . args) |
| 187 | "Invoke the catch form matching @var{key}, passing @var{args} to the |
| 188 | @var{handler}. |
| 189 | |
| 190 | @var{key} is a symbol. It will match catches of the same symbol or of @code{#t}. |
| 191 | |
| 192 | If there is no handler at all, Guile prints an error and then exits." |
| 193 | (if (not (symbol? key)) |
| 194 | ((exception-handler) 'wrong-type-arg "throw" |
| 195 | "Wrong type argument in position ~a: ~a" (list 1 key) (list key)) |
| 196 | (apply (exception-handler) key args))))) |
| 197 | |
| 198 | |
| 199 | \f |
| 200 | |
| 201 | ;;; {R4RS compliance} |
| 202 | ;;; |
| 203 | |
| 204 | (primitive-load-path "ice-9/r4rs") |
| 205 | |
| 206 | \f |
| 207 | |
| 208 | ;;; {Simple Debugging Tools} |
| 209 | ;;; |
| 210 | |
| 211 | ;; peek takes any number of arguments, writes them to the |
| 212 | ;; current ouput port, and returns the last argument. |
| 213 | ;; It is handy to wrap around an expression to look at |
| 214 | ;; a value each time is evaluated, e.g.: |
| 215 | ;; |
| 216 | ;; (+ 10 (troublesome-fn)) |
| 217 | ;; => (+ 10 (pk 'troublesome-fn-returned (troublesome-fn))) |
| 218 | ;; |
| 219 | |
| 220 | (define (peek . stuff) |
| 221 | (newline) |
| 222 | (display ";;; ") |
| 223 | (write stuff) |
| 224 | (newline) |
| 225 | (car (last-pair stuff))) |
| 226 | |
| 227 | (define pk peek) |
| 228 | |
| 229 | |
| 230 | (define (warn . stuff) |
| 231 | (with-output-to-port (current-error-port) |
| 232 | (lambda () |
| 233 | (newline) |
| 234 | (display ";;; WARNING ") |
| 235 | (display stuff) |
| 236 | (newline) |
| 237 | (car (last-pair stuff))))) |
| 238 | |
| 239 | \f |
| 240 | |
| 241 | ;;; {Features} |
| 242 | ;;; |
| 243 | |
| 244 | (define (provide sym) |
| 245 | (if (not (memq sym *features*)) |
| 246 | (set! *features* (cons sym *features*)))) |
| 247 | |
| 248 | ;; Return #t iff FEATURE is available to this Guile interpreter. In SLIB, |
| 249 | ;; provided? also checks to see if the module is available. We should do that |
| 250 | ;; too, but don't. |
| 251 | |
| 252 | (define (provided? feature) |
| 253 | (and (memq feature *features*) #t)) |
| 254 | |
| 255 | \f |
| 256 | |
| 257 | ;;; {and-map and or-map} |
| 258 | ;;; |
| 259 | ;;; (and-map fn lst) is like (and (fn (car lst)) (fn (cadr lst)) (fn...) ...) |
| 260 | ;;; (or-map fn lst) is like (or (fn (car lst)) (fn (cadr lst)) (fn...) ...) |
| 261 | ;;; |
| 262 | |
| 263 | ;; and-map f l |
| 264 | ;; |
| 265 | ;; Apply f to successive elements of l until exhaustion or f returns #f. |
| 266 | ;; If returning early, return #f. Otherwise, return the last value returned |
| 267 | ;; by f. If f has never been called because l is empty, return #t. |
| 268 | ;; |
| 269 | (define (and-map f lst) |
| 270 | (let loop ((result #t) |
| 271 | (l lst)) |
| 272 | (and result |
| 273 | (or (and (null? l) |
| 274 | result) |
| 275 | (loop (f (car l)) (cdr l)))))) |
| 276 | |
| 277 | ;; or-map f l |
| 278 | ;; |
| 279 | ;; Apply f to successive elements of l until exhaustion or while f returns #f. |
| 280 | ;; If returning early, return the return value of f. |
| 281 | ;; |
| 282 | (define (or-map f lst) |
| 283 | (let loop ((result #f) |
| 284 | (l lst)) |
| 285 | (or result |
| 286 | (and (not (null? l)) |
| 287 | (loop (f (car l)) (cdr l)))))) |
| 288 | |
| 289 | \f |
| 290 | |
| 291 | ;; let format alias simple-format until the more complete version is loaded |
| 292 | |
| 293 | (define format simple-format) |
| 294 | |
| 295 | ;; this is scheme wrapping the C code so the final pred call is a tail call, |
| 296 | ;; per SRFI-13 spec |
| 297 | (define string-any |
| 298 | (lambda* (char_pred s #:optional (start 0) (end (string-length s))) |
| 299 | (if (and (procedure? char_pred) |
| 300 | (> end start) |
| 301 | (<= end (string-length s))) ;; let c-code handle range error |
| 302 | (or (string-any-c-code char_pred s start (1- end)) |
| 303 | (char_pred (string-ref s (1- end)))) |
| 304 | (string-any-c-code char_pred s start end)))) |
| 305 | |
| 306 | ;; this is scheme wrapping the C code so the final pred call is a tail call, |
| 307 | ;; per SRFI-13 spec |
| 308 | (define string-every |
| 309 | (lambda* (char_pred s #:optional (start 0) (end (string-length s))) |
| 310 | (if (and (procedure? char_pred) |
| 311 | (> end start) |
| 312 | (<= end (string-length s))) ;; let c-code handle range error |
| 313 | (and (string-every-c-code char_pred s start (1- end)) |
| 314 | (char_pred (string-ref s (1- end)))) |
| 315 | (string-every-c-code char_pred s start end)))) |
| 316 | |
| 317 | ;; A variant of string-fill! that we keep for compatability |
| 318 | ;; |
| 319 | (define (substring-fill! str start end fill) |
| 320 | (string-fill! str fill start end)) |
| 321 | |
| 322 | \f |
| 323 | |
| 324 | ;; Define a minimal stub of the module API for psyntax, before modules |
| 325 | ;; have booted. |
| 326 | (define (module-name x) |
| 327 | '(guile)) |
| 328 | (define (module-define! module sym val) |
| 329 | (let ((v (hashq-ref (%get-pre-modules-obarray) sym))) |
| 330 | (if v |
| 331 | (variable-set! v val) |
| 332 | (hashq-set! (%get-pre-modules-obarray) sym |
| 333 | (make-variable val))))) |
| 334 | (define (module-ref module sym) |
| 335 | (let ((v (module-variable module sym))) |
| 336 | (if v (variable-ref v) (error "badness!" (pk module) (pk sym))))) |
| 337 | (define (resolve-module . args) |
| 338 | #f) |
| 339 | |
| 340 | ;; Input hook to syncase -- so that we might be able to pass annotated |
| 341 | ;; expressions in. Currently disabled. Maybe we should just use |
| 342 | ;; source-properties directly. |
| 343 | (define (annotation? x) #f) |
| 344 | |
| 345 | ;; API provided by psyntax |
| 346 | (define syntax-violation #f) |
| 347 | (define datum->syntax #f) |
| 348 | (define syntax->datum #f) |
| 349 | (define identifier? #f) |
| 350 | (define generate-temporaries #f) |
| 351 | (define bound-identifier=? #f) |
| 352 | (define free-identifier=? #f) |
| 353 | |
| 354 | ;; $sc-dispatch is an implementation detail of psyntax. It is used by |
| 355 | ;; expanded macros, to dispatch an input against a set of patterns. |
| 356 | (define $sc-dispatch #f) |
| 357 | |
| 358 | ;; Load it up! |
| 359 | (primitive-load-path "ice-9/psyntax-pp") |
| 360 | ;; The binding for `macroexpand' has now been overridden, making psyntax the |
| 361 | ;; expander now. |
| 362 | |
| 363 | (define-syntax and |
| 364 | (syntax-rules () |
| 365 | ((_) #t) |
| 366 | ((_ x) x) |
| 367 | ((_ x y ...) (if x (and y ...) #f)))) |
| 368 | |
| 369 | (define-syntax or |
| 370 | (syntax-rules () |
| 371 | ((_) #f) |
| 372 | ((_ x) x) |
| 373 | ((_ x y ...) (let ((t x)) (if t t (or y ...)))))) |
| 374 | |
| 375 | ;; The "maybe-more" bits are something of a hack, so that we can support |
| 376 | ;; SRFI-61. Rewrites into a standalone syntax-case macro would be |
| 377 | ;; appreciated. |
| 378 | (define-syntax cond |
| 379 | (syntax-rules (=> else) |
| 380 | ((_ "maybe-more" test consequent) |
| 381 | (if test consequent)) |
| 382 | |
| 383 | ((_ "maybe-more" test consequent clause ...) |
| 384 | (if test consequent (cond clause ...))) |
| 385 | |
| 386 | ((_ (else else1 else2 ...)) |
| 387 | (begin else1 else2 ...)) |
| 388 | |
| 389 | ((_ (test => receiver) more-clause ...) |
| 390 | (let ((t test)) |
| 391 | (cond "maybe-more" t (receiver t) more-clause ...))) |
| 392 | |
| 393 | ((_ (generator guard => receiver) more-clause ...) |
| 394 | (call-with-values (lambda () generator) |
| 395 | (lambda t |
| 396 | (cond "maybe-more" |
| 397 | (apply guard t) (apply receiver t) more-clause ...)))) |
| 398 | |
| 399 | ((_ (test => receiver ...) more-clause ...) |
| 400 | (syntax-violation 'cond "wrong number of receiver expressions" |
| 401 | '(test => receiver ...))) |
| 402 | ((_ (generator guard => receiver ...) more-clause ...) |
| 403 | (syntax-violation 'cond "wrong number of receiver expressions" |
| 404 | '(generator guard => receiver ...))) |
| 405 | |
| 406 | ((_ (test) more-clause ...) |
| 407 | (let ((t test)) |
| 408 | (cond "maybe-more" t t more-clause ...))) |
| 409 | |
| 410 | ((_ (test body1 body2 ...) more-clause ...) |
| 411 | (cond "maybe-more" |
| 412 | test (begin body1 body2 ...) more-clause ...)))) |
| 413 | |
| 414 | (define-syntax case |
| 415 | (syntax-rules (else) |
| 416 | ((case (key ...) |
| 417 | clauses ...) |
| 418 | (let ((atom-key (key ...))) |
| 419 | (case atom-key clauses ...))) |
| 420 | ((case key |
| 421 | (else result1 result2 ...)) |
| 422 | (begin result1 result2 ...)) |
| 423 | ((case key |
| 424 | ((atoms ...) result1 result2 ...)) |
| 425 | (if (memv key '(atoms ...)) |
| 426 | (begin result1 result2 ...))) |
| 427 | ((case key |
| 428 | ((atoms ...) result1 result2 ...) |
| 429 | clause clauses ...) |
| 430 | (if (memv key '(atoms ...)) |
| 431 | (begin result1 result2 ...) |
| 432 | (case key clause clauses ...))))) |
| 433 | |
| 434 | (define-syntax do |
| 435 | (syntax-rules () |
| 436 | ((do ((var init step ...) ...) |
| 437 | (test expr ...) |
| 438 | command ...) |
| 439 | (letrec |
| 440 | ((loop |
| 441 | (lambda (var ...) |
| 442 | (if test |
| 443 | (begin |
| 444 | (if #f #f) |
| 445 | expr ...) |
| 446 | (begin |
| 447 | command |
| 448 | ... |
| 449 | (loop (do "step" var step ...) |
| 450 | ...)))))) |
| 451 | (loop init ...))) |
| 452 | ((do "step" x) |
| 453 | x) |
| 454 | ((do "step" x y) |
| 455 | y))) |
| 456 | |
| 457 | (define-syntax delay |
| 458 | (syntax-rules () |
| 459 | ((_ exp) (make-promise (lambda () exp))))) |
| 460 | |
| 461 | (include-from-path "ice-9/quasisyntax") |
| 462 | |
| 463 | \f |
| 464 | |
| 465 | ;;; {Defmacros} |
| 466 | ;;; |
| 467 | |
| 468 | (define-syntax define-macro |
| 469 | (lambda (x) |
| 470 | "Define a defmacro." |
| 471 | (syntax-case x () |
| 472 | ((_ (macro . args) doc body1 body ...) |
| 473 | (string? (syntax->datum #'doc)) |
| 474 | #'(define-macro macro doc (lambda args body1 body ...))) |
| 475 | ((_ (macro . args) body ...) |
| 476 | #'(define-macro macro #f (lambda args body ...))) |
| 477 | ((_ macro doc transformer) |
| 478 | (or (string? (syntax->datum #'doc)) |
| 479 | (not (syntax->datum #'doc))) |
| 480 | #'(define-syntax macro |
| 481 | (lambda (y) |
| 482 | doc |
| 483 | #((macro-type . defmacro) |
| 484 | (defmacro-args args)) |
| 485 | (syntax-case y () |
| 486 | ((_ . args) |
| 487 | (let ((v (syntax->datum #'args))) |
| 488 | (datum->syntax y (apply transformer v))))))))))) |
| 489 | |
| 490 | (define-syntax defmacro |
| 491 | (lambda (x) |
| 492 | "Define a defmacro, with the old lispy defun syntax." |
| 493 | (syntax-case x () |
| 494 | ((_ macro args doc body1 body ...) |
| 495 | (string? (syntax->datum #'doc)) |
| 496 | #'(define-macro macro doc (lambda args body1 body ...))) |
| 497 | ((_ macro args body ...) |
| 498 | #'(define-macro macro #f (lambda args body ...)))))) |
| 499 | |
| 500 | (provide 'defmacro) |
| 501 | |
| 502 | \f |
| 503 | |
| 504 | ;;; {Deprecation} |
| 505 | ;;; |
| 506 | ;;; Depends on: defmacro |
| 507 | ;;; |
| 508 | |
| 509 | (defmacro begin-deprecated forms |
| 510 | (if (include-deprecated-features) |
| 511 | `(begin ,@forms) |
| 512 | `(begin))) |
| 513 | |
| 514 | \f |
| 515 | |
| 516 | ;;; {Trivial Functions} |
| 517 | ;;; |
| 518 | |
| 519 | (define (identity x) x) |
| 520 | (define (and=> value procedure) (and value (procedure value))) |
| 521 | (define call/cc call-with-current-continuation) |
| 522 | |
| 523 | ;;; apply-to-args is functionally redundant with apply and, worse, |
| 524 | ;;; is less general than apply since it only takes two arguments. |
| 525 | ;;; |
| 526 | ;;; On the other hand, apply-to-args is a syntacticly convenient way to |
| 527 | ;;; perform binding in many circumstances when the "let" family of |
| 528 | ;;; of forms don't cut it. E.g.: |
| 529 | ;;; |
| 530 | ;;; (apply-to-args (return-3d-mouse-coords) |
| 531 | ;;; (lambda (x y z) |
| 532 | ;;; ...)) |
| 533 | ;;; |
| 534 | |
| 535 | (define (apply-to-args args fn) (apply fn args)) |
| 536 | |
| 537 | (defmacro false-if-exception (expr) |
| 538 | `(catch #t |
| 539 | (lambda () |
| 540 | ;; avoid saving backtraces inside false-if-exception |
| 541 | (with-fluids ((the-last-stack (fluid-ref the-last-stack))) |
| 542 | ,expr)) |
| 543 | (lambda args #f))) |
| 544 | |
| 545 | \f |
| 546 | |
| 547 | ;;; {General Properties} |
| 548 | ;;; |
| 549 | |
| 550 | ;; This is a more modern interface to properties. It will replace all |
| 551 | ;; other property-like things eventually. |
| 552 | |
| 553 | (define (make-object-property) |
| 554 | (let ((prop (primitive-make-property #f))) |
| 555 | (make-procedure-with-setter |
| 556 | (lambda (obj) (primitive-property-ref prop obj)) |
| 557 | (lambda (obj val) (primitive-property-set! prop obj val))))) |
| 558 | |
| 559 | \f |
| 560 | |
| 561 | ;;; {Symbol Properties} |
| 562 | ;;; |
| 563 | |
| 564 | (define (symbol-property sym prop) |
| 565 | (let ((pair (assoc prop (symbol-pref sym)))) |
| 566 | (and pair (cdr pair)))) |
| 567 | |
| 568 | (define (set-symbol-property! sym prop val) |
| 569 | (let ((pair (assoc prop (symbol-pref sym)))) |
| 570 | (if pair |
| 571 | (set-cdr! pair val) |
| 572 | (symbol-pset! sym (acons prop val (symbol-pref sym)))))) |
| 573 | |
| 574 | (define (symbol-property-remove! sym prop) |
| 575 | (let ((pair (assoc prop (symbol-pref sym)))) |
| 576 | (if pair |
| 577 | (symbol-pset! sym (delq! pair (symbol-pref sym)))))) |
| 578 | |
| 579 | \f |
| 580 | |
| 581 | ;;; {Arrays} |
| 582 | ;;; |
| 583 | |
| 584 | (define (array-shape a) |
| 585 | (map (lambda (ind) (if (number? ind) (list 0 (+ -1 ind)) ind)) |
| 586 | (array-dimensions a))) |
| 587 | |
| 588 | \f |
| 589 | |
| 590 | ;;; {Keywords} |
| 591 | ;;; |
| 592 | |
| 593 | (define (kw-arg-ref args kw) |
| 594 | (let ((rem (member kw args))) |
| 595 | (and rem (pair? (cdr rem)) (cadr rem)))) |
| 596 | |
| 597 | \f |
| 598 | |
| 599 | ;;; {Structs} |
| 600 | ;;; |
| 601 | |
| 602 | (define (struct-layout s) |
| 603 | (struct-ref (struct-vtable s) vtable-index-layout)) |
| 604 | |
| 605 | \f |
| 606 | |
| 607 | ;;; {Records} |
| 608 | ;;; |
| 609 | |
| 610 | ;; Printing records: by default, records are printed as |
| 611 | ;; |
| 612 | ;; #<type-name field1: val1 field2: val2 ...> |
| 613 | ;; |
| 614 | ;; You can change that by giving a custom printing function to |
| 615 | ;; MAKE-RECORD-TYPE (after the list of field symbols). This function |
| 616 | ;; will be called like |
| 617 | ;; |
| 618 | ;; (<printer> object port) |
| 619 | ;; |
| 620 | ;; It should print OBJECT to PORT. |
| 621 | |
| 622 | (define (inherit-print-state old-port new-port) |
| 623 | (if (get-print-state old-port) |
| 624 | (port-with-print-state new-port (get-print-state old-port)) |
| 625 | new-port)) |
| 626 | |
| 627 | ;; 0: type-name, 1: fields, 2: constructor |
| 628 | (define record-type-vtable |
| 629 | ;; FIXME: This should just call make-vtable, not make-vtable-vtable; but for |
| 630 | ;; that we need to expose the bare vtable-vtable to Scheme. |
| 631 | (make-vtable-vtable "prprpw" 0 |
| 632 | (lambda (s p) |
| 633 | (cond ((eq? s record-type-vtable) |
| 634 | (display "#<record-type-vtable>" p)) |
| 635 | (else |
| 636 | (display "#<record-type " p) |
| 637 | (display (record-type-name s) p) |
| 638 | (display ">" p)))))) |
| 639 | |
| 640 | (define (record-type? obj) |
| 641 | (and (struct? obj) (eq? record-type-vtable (struct-vtable obj)))) |
| 642 | |
| 643 | (define* (make-record-type type-name fields #:optional printer) |
| 644 | ;; Pre-generate constructors for nfields < 20. |
| 645 | (define-syntax make-constructor |
| 646 | (lambda (x) |
| 647 | (define *max-static-argument-count* 20) |
| 648 | (define (make-formals n) |
| 649 | (let lp ((i 0)) |
| 650 | (if (< i n) |
| 651 | (cons (datum->syntax |
| 652 | x |
| 653 | (string->symbol |
| 654 | (string (integer->char (+ (char->integer #\a) i))))) |
| 655 | (lp (1+ i))) |
| 656 | '()))) |
| 657 | (syntax-case x () |
| 658 | ((_ rtd exp) (not (identifier? #'exp)) |
| 659 | #'(let ((n exp)) |
| 660 | (make-constructor rtd n))) |
| 661 | ((_ rtd nfields) |
| 662 | #`(case nfields |
| 663 | #,@(let lp ((n 0)) |
| 664 | (if (< n *max-static-argument-count*) |
| 665 | (cons (with-syntax (((formal ...) (make-formals n)) |
| 666 | (n n)) |
| 667 | #'((n) |
| 668 | (lambda (formal ...) |
| 669 | (make-struct rtd 0 formal ...)))) |
| 670 | (lp (1+ n))) |
| 671 | '())) |
| 672 | (else |
| 673 | (lambda args |
| 674 | (if (= (length args) nfields) |
| 675 | (apply make-struct rtd 0 args) |
| 676 | (scm-error 'wrong-number-of-args |
| 677 | (format #f "make-~a" type-name) |
| 678 | "Wrong number of arguments" '() #f))))))))) |
| 679 | |
| 680 | (define (default-record-printer s p) |
| 681 | (display "#<" p) |
| 682 | (display (record-type-name (record-type-descriptor s)) p) |
| 683 | (let loop ((fields (record-type-fields (record-type-descriptor s))) |
| 684 | (off 0)) |
| 685 | (cond |
| 686 | ((not (null? fields)) |
| 687 | (display " " p) |
| 688 | (display (car fields) p) |
| 689 | (display ": " p) |
| 690 | (display (struct-ref s off) p) |
| 691 | (loop (cdr fields) (+ 1 off))))) |
| 692 | (display ">" p)) |
| 693 | |
| 694 | (let ((rtd (make-struct record-type-vtable 0 |
| 695 | (make-struct-layout |
| 696 | (apply string-append |
| 697 | (map (lambda (f) "pw") fields))) |
| 698 | (or printer default-record-printer) |
| 699 | type-name |
| 700 | (copy-tree fields)))) |
| 701 | (struct-set! rtd (+ vtable-offset-user 2) |
| 702 | (make-constructor rtd (length fields))) |
| 703 | ;; Temporary solution: Associate a name to the record type descriptor |
| 704 | ;; so that the object system can create a wrapper class for it. |
| 705 | (set-struct-vtable-name! rtd (if (symbol? type-name) |
| 706 | type-name |
| 707 | (string->symbol type-name))) |
| 708 | rtd)) |
| 709 | |
| 710 | (define (record-type-name obj) |
| 711 | (if (record-type? obj) |
| 712 | (struct-ref obj vtable-offset-user) |
| 713 | (error 'not-a-record-type obj))) |
| 714 | |
| 715 | (define (record-type-fields obj) |
| 716 | (if (record-type? obj) |
| 717 | (struct-ref obj (+ 1 vtable-offset-user)) |
| 718 | (error 'not-a-record-type obj))) |
| 719 | |
| 720 | (define* (record-constructor rtd #:optional field-names) |
| 721 | (if (not field-names) |
| 722 | (struct-ref rtd (+ 2 vtable-offset-user)) |
| 723 | (primitive-eval |
| 724 | `(lambda ,field-names |
| 725 | (make-struct ',rtd 0 ,@(map (lambda (f) |
| 726 | (if (memq f field-names) |
| 727 | f |
| 728 | #f)) |
| 729 | (record-type-fields rtd))))))) |
| 730 | |
| 731 | (define (record-predicate rtd) |
| 732 | (lambda (obj) (and (struct? obj) (eq? rtd (struct-vtable obj))))) |
| 733 | |
| 734 | (define (%record-type-error rtd obj) ;; private helper |
| 735 | (or (eq? rtd (record-type-descriptor obj)) |
| 736 | (scm-error 'wrong-type-arg "%record-type-check" |
| 737 | "Wrong type record (want `~S'): ~S" |
| 738 | (list (record-type-name rtd) obj) |
| 739 | #f))) |
| 740 | |
| 741 | (define (record-accessor rtd field-name) |
| 742 | (let ((pos (list-index (record-type-fields rtd) field-name))) |
| 743 | (if (not pos) |
| 744 | (error 'no-such-field field-name)) |
| 745 | (lambda (obj) |
| 746 | (if (eq? (struct-vtable obj) rtd) |
| 747 | (struct-ref obj pos) |
| 748 | (%record-type-error rtd obj))))) |
| 749 | |
| 750 | (define (record-modifier rtd field-name) |
| 751 | (let ((pos (list-index (record-type-fields rtd) field-name))) |
| 752 | (if (not pos) |
| 753 | (error 'no-such-field field-name)) |
| 754 | (lambda (obj val) |
| 755 | (if (eq? (struct-vtable obj) rtd) |
| 756 | (struct-set! obj pos val) |
| 757 | (%record-type-error rtd obj))))) |
| 758 | |
| 759 | (define (record? obj) |
| 760 | (and (struct? obj) (record-type? (struct-vtable obj)))) |
| 761 | |
| 762 | (define (record-type-descriptor obj) |
| 763 | (if (struct? obj) |
| 764 | (struct-vtable obj) |
| 765 | (error 'not-a-record obj))) |
| 766 | |
| 767 | (provide 'record) |
| 768 | |
| 769 | \f |
| 770 | |
| 771 | ;;; {Booleans} |
| 772 | ;;; |
| 773 | |
| 774 | (define (->bool x) (not (not x))) |
| 775 | |
| 776 | \f |
| 777 | |
| 778 | ;;; {Symbols} |
| 779 | ;;; |
| 780 | |
| 781 | (define (symbol-append . args) |
| 782 | (string->symbol (apply string-append (map symbol->string args)))) |
| 783 | |
| 784 | (define (list->symbol . args) |
| 785 | (string->symbol (apply list->string args))) |
| 786 | |
| 787 | (define (symbol . args) |
| 788 | (string->symbol (apply string args))) |
| 789 | |
| 790 | \f |
| 791 | |
| 792 | ;;; {Lists} |
| 793 | ;;; |
| 794 | |
| 795 | (define (list-index l k) |
| 796 | (let loop ((n 0) |
| 797 | (l l)) |
| 798 | (and (not (null? l)) |
| 799 | (if (eq? (car l) k) |
| 800 | n |
| 801 | (loop (+ n 1) (cdr l)))))) |
| 802 | |
| 803 | \f |
| 804 | |
| 805 | (if (provided? 'posix) |
| 806 | (primitive-load-path "ice-9/posix")) |
| 807 | |
| 808 | (if (provided? 'socket) |
| 809 | (primitive-load-path "ice-9/networking")) |
| 810 | |
| 811 | ;; For reference, Emacs file-exists-p uses stat in this same way. |
| 812 | (define file-exists? |
| 813 | (if (provided? 'posix) |
| 814 | (lambda (str) |
| 815 | (->bool (stat str #f))) |
| 816 | (lambda (str) |
| 817 | (let ((port (catch 'system-error (lambda () (open-file str OPEN_READ)) |
| 818 | (lambda args #f)))) |
| 819 | (if port (begin (close-port port) #t) |
| 820 | #f))))) |
| 821 | |
| 822 | (define file-is-directory? |
| 823 | (if (provided? 'posix) |
| 824 | (lambda (str) |
| 825 | (eq? (stat:type (stat str)) 'directory)) |
| 826 | (lambda (str) |
| 827 | (let ((port (catch 'system-error |
| 828 | (lambda () (open-file (string-append str "/.") |
| 829 | OPEN_READ)) |
| 830 | (lambda args #f)))) |
| 831 | (if port (begin (close-port port) #t) |
| 832 | #f))))) |
| 833 | |
| 834 | (define (has-suffix? str suffix) |
| 835 | (string-suffix? suffix str)) |
| 836 | |
| 837 | (define (system-error-errno args) |
| 838 | (if (eq? (car args) 'system-error) |
| 839 | (car (list-ref args 4)) |
| 840 | #f)) |
| 841 | |
| 842 | \f |
| 843 | |
| 844 | ;;; {Error Handling} |
| 845 | ;;; |
| 846 | |
| 847 | (define (error . args) |
| 848 | (save-stack) |
| 849 | (if (null? args) |
| 850 | (scm-error 'misc-error #f "?" #f #f) |
| 851 | (let loop ((msg "~A") |
| 852 | (rest (cdr args))) |
| 853 | (if (not (null? rest)) |
| 854 | (loop (string-append msg " ~S") |
| 855 | (cdr rest)) |
| 856 | (scm-error 'misc-error #f msg args #f))))) |
| 857 | |
| 858 | ;; bad-throw is the hook that is called upon a throw to a an unhandled |
| 859 | ;; key (unless the throw has four arguments, in which case |
| 860 | ;; it's usually interpreted as an error throw.) |
| 861 | ;; If the key has a default handler (a throw-handler-default property), |
| 862 | ;; it is applied to the throw. |
| 863 | ;; |
| 864 | (define (bad-throw key . args) |
| 865 | (let ((default (symbol-property key 'throw-handler-default))) |
| 866 | (or (and default (apply default key args)) |
| 867 | (apply error "unhandled-exception:" key args)))) |
| 868 | |
| 869 | \f |
| 870 | |
| 871 | (define (tm:sec obj) (vector-ref obj 0)) |
| 872 | (define (tm:min obj) (vector-ref obj 1)) |
| 873 | (define (tm:hour obj) (vector-ref obj 2)) |
| 874 | (define (tm:mday obj) (vector-ref obj 3)) |
| 875 | (define (tm:mon obj) (vector-ref obj 4)) |
| 876 | (define (tm:year obj) (vector-ref obj 5)) |
| 877 | (define (tm:wday obj) (vector-ref obj 6)) |
| 878 | (define (tm:yday obj) (vector-ref obj 7)) |
| 879 | (define (tm:isdst obj) (vector-ref obj 8)) |
| 880 | (define (tm:gmtoff obj) (vector-ref obj 9)) |
| 881 | (define (tm:zone obj) (vector-ref obj 10)) |
| 882 | |
| 883 | (define (set-tm:sec obj val) (vector-set! obj 0 val)) |
| 884 | (define (set-tm:min obj val) (vector-set! obj 1 val)) |
| 885 | (define (set-tm:hour obj val) (vector-set! obj 2 val)) |
| 886 | (define (set-tm:mday obj val) (vector-set! obj 3 val)) |
| 887 | (define (set-tm:mon obj val) (vector-set! obj 4 val)) |
| 888 | (define (set-tm:year obj val) (vector-set! obj 5 val)) |
| 889 | (define (set-tm:wday obj val) (vector-set! obj 6 val)) |
| 890 | (define (set-tm:yday obj val) (vector-set! obj 7 val)) |
| 891 | (define (set-tm:isdst obj val) (vector-set! obj 8 val)) |
| 892 | (define (set-tm:gmtoff obj val) (vector-set! obj 9 val)) |
| 893 | (define (set-tm:zone obj val) (vector-set! obj 10 val)) |
| 894 | |
| 895 | (define (tms:clock obj) (vector-ref obj 0)) |
| 896 | (define (tms:utime obj) (vector-ref obj 1)) |
| 897 | (define (tms:stime obj) (vector-ref obj 2)) |
| 898 | (define (tms:cutime obj) (vector-ref obj 3)) |
| 899 | (define (tms:cstime obj) (vector-ref obj 4)) |
| 900 | |
| 901 | (define file-position ftell) |
| 902 | (define* (file-set-position port offset #:optional (whence SEEK_SET)) |
| 903 | (seek port offset whence)) |
| 904 | |
| 905 | (define (move->fdes fd/port fd) |
| 906 | (cond ((integer? fd/port) |
| 907 | (dup->fdes fd/port fd) |
| 908 | (close fd/port) |
| 909 | fd) |
| 910 | (else |
| 911 | (primitive-move->fdes fd/port fd) |
| 912 | (set-port-revealed! fd/port 1) |
| 913 | fd/port))) |
| 914 | |
| 915 | (define (release-port-handle port) |
| 916 | (let ((revealed (port-revealed port))) |
| 917 | (if (> revealed 0) |
| 918 | (set-port-revealed! port (- revealed 1))))) |
| 919 | |
| 920 | (define dup->port |
| 921 | (case-lambda |
| 922 | ((port/fd mode) |
| 923 | (fdopen (dup->fdes port/fd) mode)) |
| 924 | ((port/fd mode new-fd) |
| 925 | (let ((port (fdopen (dup->fdes port/fd new-fd) mode))) |
| 926 | (set-port-revealed! port 1) |
| 927 | port)))) |
| 928 | |
| 929 | (define dup->inport |
| 930 | (case-lambda |
| 931 | ((port/fd) |
| 932 | (dup->port port/fd "r")) |
| 933 | ((port/fd new-fd) |
| 934 | (dup->port port/fd "r" new-fd)))) |
| 935 | |
| 936 | (define dup->outport |
| 937 | (case-lambda |
| 938 | ((port/fd) |
| 939 | (dup->port port/fd "w")) |
| 940 | ((port/fd new-fd) |
| 941 | (dup->port port/fd "w" new-fd)))) |
| 942 | |
| 943 | (define dup |
| 944 | (case-lambda |
| 945 | ((port/fd) |
| 946 | (if (integer? port/fd) |
| 947 | (dup->fdes port/fd) |
| 948 | (dup->port port/fd (port-mode port/fd)))) |
| 949 | ((port/fd new-fd) |
| 950 | (if (integer? port/fd) |
| 951 | (dup->fdes port/fd new-fd) |
| 952 | (dup->port port/fd (port-mode port/fd) new-fd))))) |
| 953 | |
| 954 | (define (duplicate-port port modes) |
| 955 | (dup->port port modes)) |
| 956 | |
| 957 | (define (fdes->inport fdes) |
| 958 | (let loop ((rest-ports (fdes->ports fdes))) |
| 959 | (cond ((null? rest-ports) |
| 960 | (let ((result (fdopen fdes "r"))) |
| 961 | (set-port-revealed! result 1) |
| 962 | result)) |
| 963 | ((input-port? (car rest-ports)) |
| 964 | (set-port-revealed! (car rest-ports) |
| 965 | (+ (port-revealed (car rest-ports)) 1)) |
| 966 | (car rest-ports)) |
| 967 | (else |
| 968 | (loop (cdr rest-ports)))))) |
| 969 | |
| 970 | (define (fdes->outport fdes) |
| 971 | (let loop ((rest-ports (fdes->ports fdes))) |
| 972 | (cond ((null? rest-ports) |
| 973 | (let ((result (fdopen fdes "w"))) |
| 974 | (set-port-revealed! result 1) |
| 975 | result)) |
| 976 | ((output-port? (car rest-ports)) |
| 977 | (set-port-revealed! (car rest-ports) |
| 978 | (+ (port-revealed (car rest-ports)) 1)) |
| 979 | (car rest-ports)) |
| 980 | (else |
| 981 | (loop (cdr rest-ports)))))) |
| 982 | |
| 983 | (define (port->fdes port) |
| 984 | (set-port-revealed! port (+ (port-revealed port) 1)) |
| 985 | (fileno port)) |
| 986 | |
| 987 | (define (setenv name value) |
| 988 | (if value |
| 989 | (putenv (string-append name "=" value)) |
| 990 | (putenv name))) |
| 991 | |
| 992 | (define (unsetenv name) |
| 993 | "Remove the entry for NAME from the environment." |
| 994 | (putenv name)) |
| 995 | |
| 996 | \f |
| 997 | |
| 998 | ;;; {Load Paths} |
| 999 | ;;; |
| 1000 | |
| 1001 | ;;; Here for backward compatability |
| 1002 | ;; |
| 1003 | (define scheme-file-suffix (lambda () ".scm")) |
| 1004 | |
| 1005 | (define (in-vicinity vicinity file) |
| 1006 | (let ((tail (let ((len (string-length vicinity))) |
| 1007 | (if (zero? len) |
| 1008 | #f |
| 1009 | (string-ref vicinity (- len 1)))))) |
| 1010 | (string-append vicinity |
| 1011 | (if (or (not tail) |
| 1012 | (eq? tail #\/)) |
| 1013 | "" |
| 1014 | "/") |
| 1015 | file))) |
| 1016 | |
| 1017 | \f |
| 1018 | |
| 1019 | ;;; {Help for scm_shell} |
| 1020 | ;;; |
| 1021 | ;;; The argument-processing code used by Guile-based shells generates |
| 1022 | ;;; Scheme code based on the argument list. This page contains help |
| 1023 | ;;; functions for the code it generates. |
| 1024 | ;;; |
| 1025 | |
| 1026 | (define (command-line) (program-arguments)) |
| 1027 | |
| 1028 | ;; This is mostly for the internal use of the code generated by |
| 1029 | ;; scm_compile_shell_switches. |
| 1030 | |
| 1031 | (define (turn-on-debugging) |
| 1032 | (debug-enable 'debug) |
| 1033 | (debug-enable 'backtrace) |
| 1034 | (read-enable 'positions)) |
| 1035 | |
| 1036 | (define (load-user-init) |
| 1037 | (let* ((home (or (getenv "HOME") |
| 1038 | (false-if-exception (passwd:dir (getpwuid (getuid)))) |
| 1039 | "/")) ;; fallback for cygwin etc. |
| 1040 | (init-file (in-vicinity home ".guile"))) |
| 1041 | (if (file-exists? init-file) |
| 1042 | (primitive-load init-file)))) |
| 1043 | |
| 1044 | \f |
| 1045 | |
| 1046 | ;;; {The interpreter stack} |
| 1047 | ;;; |
| 1048 | |
| 1049 | ;; %stacks defined in stacks.c |
| 1050 | (define (%start-stack tag thunk) |
| 1051 | (let ((prompt-tag (make-prompt-tag "start-stack"))) |
| 1052 | (call-with-prompt |
| 1053 | prompt-tag |
| 1054 | (lambda () |
| 1055 | (with-fluids ((%stacks (acons tag prompt-tag |
| 1056 | (or (fluid-ref %stacks) '())))) |
| 1057 | (thunk))) |
| 1058 | (lambda (k . args) |
| 1059 | (%start-stack tag (lambda () (apply k args))))))) |
| 1060 | (define-syntax start-stack |
| 1061 | (syntax-rules () |
| 1062 | ((_ tag exp) |
| 1063 | (%start-stack tag (lambda () exp))))) |
| 1064 | |
| 1065 | \f |
| 1066 | |
| 1067 | ;;; {Loading by paths} |
| 1068 | ;;; |
| 1069 | |
| 1070 | ;;; Load a Scheme source file named NAME, searching for it in the |
| 1071 | ;;; directories listed in %load-path, and applying each of the file |
| 1072 | ;;; name extensions listed in %load-extensions. |
| 1073 | (define (load-from-path name) |
| 1074 | (start-stack 'load-stack |
| 1075 | (primitive-load-path name))) |
| 1076 | |
| 1077 | (define %load-verbosely #f) |
| 1078 | (define (assert-load-verbosity v) (set! %load-verbosely v)) |
| 1079 | |
| 1080 | (define (%load-announce file) |
| 1081 | (if %load-verbosely |
| 1082 | (with-output-to-port (current-error-port) |
| 1083 | (lambda () |
| 1084 | (display ";;; ") |
| 1085 | (display "loading ") |
| 1086 | (display file) |
| 1087 | (newline) |
| 1088 | (force-output))))) |
| 1089 | |
| 1090 | (set! %load-hook %load-announce) |
| 1091 | |
| 1092 | (define* (load name #:optional reader) |
| 1093 | ;; Returns the .go file corresponding to `name'. Does not search load |
| 1094 | ;; paths, only the fallback path. If the .go file is missing or out of |
| 1095 | ;; date, and autocompilation is enabled, will try autocompilation, just |
| 1096 | ;; as primitive-load-path does internally. primitive-load is |
| 1097 | ;; unaffected. Returns #f if autocompilation failed or was disabled. |
| 1098 | ;; |
| 1099 | ;; NB: Unless we need to compile the file, this function should not cause |
| 1100 | ;; (system base compile) to be loaded up. For that reason compiled-file-name |
| 1101 | ;; partially duplicates functionality from (system base compile). |
| 1102 | (define (compiled-file-name canon-path) |
| 1103 | (and %compile-fallback-path |
| 1104 | (string-append |
| 1105 | %compile-fallback-path |
| 1106 | ;; no need for '/' separator here, canon-path is absolute |
| 1107 | canon-path |
| 1108 | (cond ((or (null? %load-compiled-extensions) |
| 1109 | (string-null? (car %load-compiled-extensions))) |
| 1110 | (warn "invalid %load-compiled-extensions" |
| 1111 | %load-compiled-extensions) |
| 1112 | ".go") |
| 1113 | (else (car %load-compiled-extensions)))))) |
| 1114 | (define (fresh-compiled-file-name go-path) |
| 1115 | (catch #t |
| 1116 | (lambda () |
| 1117 | (let* ((scmstat (stat name)) |
| 1118 | (gostat (stat go-path #f))) |
| 1119 | (if (and gostat (= (stat:mtime gostat) (stat:mtime scmstat))) |
| 1120 | go-path |
| 1121 | (begin |
| 1122 | (if gostat |
| 1123 | (format (current-error-port) |
| 1124 | ";;; note: source file ~a\n;;; newer than compiled ~a\n" |
| 1125 | name go-path)) |
| 1126 | (cond |
| 1127 | (%load-should-autocompile |
| 1128 | (%warn-autocompilation-enabled) |
| 1129 | (format (current-error-port) ";;; compiling ~a\n" name) |
| 1130 | (let ((cfn ((@ (system base compile) compile-file) name |
| 1131 | #:env (current-module)))) |
| 1132 | (format (current-error-port) ";;; compiled ~a\n" cfn) |
| 1133 | cfn)) |
| 1134 | (else #f)))))) |
| 1135 | (lambda (k . args) |
| 1136 | (format (current-error-port) |
| 1137 | ";;; WARNING: compilation of ~a failed:\n;;; key ~a, throw_args ~s\n" |
| 1138 | name k args) |
| 1139 | #f))) |
| 1140 | (with-fluids ((current-reader reader)) |
| 1141 | (let ((cfn (and=> (and=> (false-if-exception (canonicalize-path name)) |
| 1142 | compiled-file-name) |
| 1143 | fresh-compiled-file-name))) |
| 1144 | (if cfn |
| 1145 | (load-compiled cfn) |
| 1146 | (start-stack 'load-stack |
| 1147 | (primitive-load name)))))) |
| 1148 | |
| 1149 | \f |
| 1150 | |
| 1151 | ;;; {Reader Extensions} |
| 1152 | ;;; |
| 1153 | ;;; Reader code for various "#c" forms. |
| 1154 | ;;; |
| 1155 | |
| 1156 | (define read-eval? (make-fluid)) |
| 1157 | (fluid-set! read-eval? #f) |
| 1158 | (read-hash-extend #\. |
| 1159 | (lambda (c port) |
| 1160 | (if (fluid-ref read-eval?) |
| 1161 | (eval (read port) (interaction-environment)) |
| 1162 | (error |
| 1163 | "#. read expansion found and read-eval? is #f.")))) |
| 1164 | |
| 1165 | \f |
| 1166 | |
| 1167 | ;;; {Command Line Options} |
| 1168 | ;;; |
| 1169 | |
| 1170 | (define (get-option argv kw-opts kw-args return) |
| 1171 | (cond |
| 1172 | ((null? argv) |
| 1173 | (return #f #f argv)) |
| 1174 | |
| 1175 | ((or (not (eq? #\- (string-ref (car argv) 0))) |
| 1176 | (eq? (string-length (car argv)) 1)) |
| 1177 | (return 'normal-arg (car argv) (cdr argv))) |
| 1178 | |
| 1179 | ((eq? #\- (string-ref (car argv) 1)) |
| 1180 | (let* ((kw-arg-pos (or (string-index (car argv) #\=) |
| 1181 | (string-length (car argv)))) |
| 1182 | (kw (symbol->keyword (substring (car argv) 2 kw-arg-pos))) |
| 1183 | (kw-opt? (member kw kw-opts)) |
| 1184 | (kw-arg? (member kw kw-args)) |
| 1185 | (arg (or (and (not (eq? kw-arg-pos (string-length (car argv)))) |
| 1186 | (substring (car argv) |
| 1187 | (+ kw-arg-pos 1) |
| 1188 | (string-length (car argv)))) |
| 1189 | (and kw-arg? |
| 1190 | (begin (set! argv (cdr argv)) (car argv)))))) |
| 1191 | (if (or kw-opt? kw-arg?) |
| 1192 | (return kw arg (cdr argv)) |
| 1193 | (return 'usage-error kw (cdr argv))))) |
| 1194 | |
| 1195 | (else |
| 1196 | (let* ((char (substring (car argv) 1 2)) |
| 1197 | (kw (symbol->keyword char))) |
| 1198 | (cond |
| 1199 | |
| 1200 | ((member kw kw-opts) |
| 1201 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) |
| 1202 | (new-argv (if (= 0 (string-length rest-car)) |
| 1203 | (cdr argv) |
| 1204 | (cons (string-append "-" rest-car) (cdr argv))))) |
| 1205 | (return kw #f new-argv))) |
| 1206 | |
| 1207 | ((member kw kw-args) |
| 1208 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) |
| 1209 | (arg (if (= 0 (string-length rest-car)) |
| 1210 | (cadr argv) |
| 1211 | rest-car)) |
| 1212 | (new-argv (if (= 0 (string-length rest-car)) |
| 1213 | (cddr argv) |
| 1214 | (cdr argv)))) |
| 1215 | (return kw arg new-argv))) |
| 1216 | |
| 1217 | (else (return 'usage-error kw argv))))))) |
| 1218 | |
| 1219 | (define (for-next-option proc argv kw-opts kw-args) |
| 1220 | (let loop ((argv argv)) |
| 1221 | (get-option argv kw-opts kw-args |
| 1222 | (lambda (opt opt-arg argv) |
| 1223 | (and opt (proc opt opt-arg argv loop)))))) |
| 1224 | |
| 1225 | (define (display-usage-report kw-desc) |
| 1226 | (for-each |
| 1227 | (lambda (kw) |
| 1228 | (or (eq? (car kw) #t) |
| 1229 | (eq? (car kw) 'else) |
| 1230 | (let* ((opt-desc kw) |
| 1231 | (help (cadr opt-desc)) |
| 1232 | (opts (car opt-desc)) |
| 1233 | (opts-proper (if (string? (car opts)) (cdr opts) opts)) |
| 1234 | (arg-name (if (string? (car opts)) |
| 1235 | (string-append "<" (car opts) ">") |
| 1236 | "")) |
| 1237 | (left-part (string-append |
| 1238 | (with-output-to-string |
| 1239 | (lambda () |
| 1240 | (map (lambda (x) (display (keyword->symbol x)) (display " ")) |
| 1241 | opts-proper))) |
| 1242 | arg-name)) |
| 1243 | (middle-part (if (and (< (string-length left-part) 30) |
| 1244 | (< (string-length help) 40)) |
| 1245 | (make-string (- 30 (string-length left-part)) #\ ) |
| 1246 | "\n\t"))) |
| 1247 | (display left-part) |
| 1248 | (display middle-part) |
| 1249 | (display help) |
| 1250 | (newline)))) |
| 1251 | kw-desc)) |
| 1252 | |
| 1253 | |
| 1254 | |
| 1255 | (define (transform-usage-lambda cases) |
| 1256 | (let* ((raw-usage (delq! 'else (map car cases))) |
| 1257 | (usage-sans-specials (map (lambda (x) |
| 1258 | (or (and (not (list? x)) x) |
| 1259 | (and (symbol? (car x)) #t) |
| 1260 | (and (boolean? (car x)) #t) |
| 1261 | x)) |
| 1262 | raw-usage)) |
| 1263 | (usage-desc (delq! #t usage-sans-specials)) |
| 1264 | (kw-desc (map car usage-desc)) |
| 1265 | (kw-opts (apply append (map (lambda (x) (and (not (string? (car x))) x)) kw-desc))) |
| 1266 | (kw-args (apply append (map (lambda (x) (and (string? (car x)) (cdr x))) kw-desc))) |
| 1267 | (transmogrified-cases (map (lambda (case) |
| 1268 | (cons (let ((opts (car case))) |
| 1269 | (if (or (boolean? opts) (eq? 'else opts)) |
| 1270 | opts |
| 1271 | (cond |
| 1272 | ((symbol? (car opts)) opts) |
| 1273 | ((boolean? (car opts)) opts) |
| 1274 | ((string? (caar opts)) (cdar opts)) |
| 1275 | (else (car opts))))) |
| 1276 | (cdr case))) |
| 1277 | cases))) |
| 1278 | `(let ((%display-usage (lambda () (display-usage-report ',usage-desc)))) |
| 1279 | (lambda (%argv) |
| 1280 | (let %next-arg ((%argv %argv)) |
| 1281 | (get-option %argv |
| 1282 | ',kw-opts |
| 1283 | ',kw-args |
| 1284 | (lambda (%opt %arg %new-argv) |
| 1285 | (case %opt |
| 1286 | ,@ transmogrified-cases)))))))) |
| 1287 | |
| 1288 | |
| 1289 | \f |
| 1290 | |
| 1291 | ;;; {Low Level Modules} |
| 1292 | ;;; |
| 1293 | ;;; These are the low level data structures for modules. |
| 1294 | ;;; |
| 1295 | ;;; Every module object is of the type 'module-type', which is a record |
| 1296 | ;;; consisting of the following members: |
| 1297 | ;;; |
| 1298 | ;;; - eval-closure: the function that defines for its module the strategy that |
| 1299 | ;;; shall be followed when looking up symbols in the module. |
| 1300 | ;;; |
| 1301 | ;;; An eval-closure is a function taking two arguments: the symbol to be |
| 1302 | ;;; looked up and a boolean value telling whether a binding for the symbol |
| 1303 | ;;; should be created if it does not exist yet. If the symbol lookup |
| 1304 | ;;; succeeded (either because an existing binding was found or because a new |
| 1305 | ;;; binding was created), a variable object representing the binding is |
| 1306 | ;;; returned. Otherwise, the value #f is returned. Note that the eval |
| 1307 | ;;; closure does not take the module to be searched as an argument: During |
| 1308 | ;;; construction of the eval-closure, the eval-closure has to store the |
| 1309 | ;;; module it belongs to in its environment. This means, that any |
| 1310 | ;;; eval-closure can belong to only one module. |
| 1311 | ;;; |
| 1312 | ;;; The eval-closure of a module can be defined arbitrarily. However, three |
| 1313 | ;;; special cases of eval-closures are to be distinguished: During startup |
| 1314 | ;;; the module system is not yet activated. In this phase, no modules are |
| 1315 | ;;; defined and all bindings are automatically stored by the system in the |
| 1316 | ;;; pre-modules-obarray. Since no eval-closures exist at this time, the |
| 1317 | ;;; functions which require an eval-closure as their argument need to be |
| 1318 | ;;; passed the value #f. |
| 1319 | ;;; |
| 1320 | ;;; The other two special cases of eval-closures are the |
| 1321 | ;;; standard-eval-closure and the standard-interface-eval-closure. Both |
| 1322 | ;;; behave equally for the case that no new binding is to be created. The |
| 1323 | ;;; difference between the two comes in, when the boolean argument to the |
| 1324 | ;;; eval-closure indicates that a new binding shall be created if it is not |
| 1325 | ;;; found. |
| 1326 | ;;; |
| 1327 | ;;; Given that no new binding shall be created, both standard eval-closures |
| 1328 | ;;; define the following standard strategy of searching bindings in the |
| 1329 | ;;; module: First, the module's obarray is searched for the symbol. Second, |
| 1330 | ;;; if no binding for the symbol was found in the module's obarray, the |
| 1331 | ;;; module's binder procedure is exececuted. If this procedure did not |
| 1332 | ;;; return a binding for the symbol, the modules referenced in the module's |
| 1333 | ;;; uses list are recursively searched for a binding of the symbol. If the |
| 1334 | ;;; binding can not be found in these modules also, the symbol lookup has |
| 1335 | ;;; failed. |
| 1336 | ;;; |
| 1337 | ;;; If a new binding shall be created, the standard-interface-eval-closure |
| 1338 | ;;; immediately returns indicating failure. That is, it does not even try |
| 1339 | ;;; to look up the symbol. In contrast, the standard-eval-closure would |
| 1340 | ;;; first search the obarray, and if no binding was found there, would |
| 1341 | ;;; create a new binding in the obarray, therefore not calling the binder |
| 1342 | ;;; procedure or searching the modules in the uses list. |
| 1343 | ;;; |
| 1344 | ;;; The explanation of the following members obarray, binder and uses |
| 1345 | ;;; assumes that the symbol lookup follows the strategy that is defined in |
| 1346 | ;;; the standard-eval-closure and the standard-interface-eval-closure. |
| 1347 | ;;; |
| 1348 | ;;; - obarray: a hash table that maps symbols to variable objects. In this |
| 1349 | ;;; hash table, the definitions are found that are local to the module (that |
| 1350 | ;;; is, not imported from other modules). When looking up bindings in the |
| 1351 | ;;; module, this hash table is searched first. |
| 1352 | ;;; |
| 1353 | ;;; - binder: either #f or a function taking a module and a symbol argument. |
| 1354 | ;;; If it is a function it is called after the obarray has been |
| 1355 | ;;; unsuccessfully searched for a binding. It then can provide bindings |
| 1356 | ;;; that would otherwise not be found locally in the module. |
| 1357 | ;;; |
| 1358 | ;;; - uses: a list of modules from which non-local bindings can be inherited. |
| 1359 | ;;; These modules are the third place queried for bindings after the obarray |
| 1360 | ;;; has been unsuccessfully searched and the binder function did not deliver |
| 1361 | ;;; a result either. |
| 1362 | ;;; |
| 1363 | ;;; - transformer: either #f or a function taking a scheme expression as |
| 1364 | ;;; delivered by read. If it is a function, it will be called to perform |
| 1365 | ;;; syntax transformations (e. g. makro expansion) on the given scheme |
| 1366 | ;;; expression. The output of the transformer function will then be passed |
| 1367 | ;;; to Guile's internal memoizer. This means that the output must be valid |
| 1368 | ;;; scheme code. The only exception is, that the output may make use of the |
| 1369 | ;;; syntax extensions provided to identify the modules that a binding |
| 1370 | ;;; belongs to. |
| 1371 | ;;; |
| 1372 | ;;; - name: the name of the module. This is used for all kinds of printing |
| 1373 | ;;; outputs. In certain places the module name also serves as a way of |
| 1374 | ;;; identification. When adding a module to the uses list of another |
| 1375 | ;;; module, it is made sure that the new uses list will not contain two |
| 1376 | ;;; modules of the same name. |
| 1377 | ;;; |
| 1378 | ;;; - kind: classification of the kind of module. The value is (currently?) |
| 1379 | ;;; only used for printing. It has no influence on how a module is treated. |
| 1380 | ;;; Currently the following values are used when setting the module kind: |
| 1381 | ;;; 'module, 'directory, 'interface, 'custom-interface. If no explicit kind |
| 1382 | ;;; is set, it defaults to 'module. |
| 1383 | ;;; |
| 1384 | ;;; - duplicates-handlers: a list of procedures that get called to make a |
| 1385 | ;;; choice between two duplicate bindings when name clashes occur. See the |
| 1386 | ;;; `duplicate-handlers' global variable below. |
| 1387 | ;;; |
| 1388 | ;;; - observers: a list of procedures that get called when the module is |
| 1389 | ;;; modified. |
| 1390 | ;;; |
| 1391 | ;;; - weak-observers: a weak-key hash table of procedures that get called |
| 1392 | ;;; when the module is modified. See `module-observe-weak' for details. |
| 1393 | ;;; |
| 1394 | ;;; In addition, the module may (must?) contain a binding for |
| 1395 | ;;; `%module-public-interface'. This variable should be bound to a module |
| 1396 | ;;; representing the exported interface of a module. See the |
| 1397 | ;;; `module-public-interface' and `module-export!' procedures. |
| 1398 | ;;; |
| 1399 | ;;; !!! warning: The interface to lazy binder procedures is going |
| 1400 | ;;; to be changed in an incompatible way to permit all the basic |
| 1401 | ;;; module ops to be virtualized. |
| 1402 | ;;; |
| 1403 | ;;; (make-module size use-list lazy-binding-proc) => module |
| 1404 | ;;; module-{obarray,uses,binder}[|-set!] |
| 1405 | ;;; (module? obj) => [#t|#f] |
| 1406 | ;;; (module-locally-bound? module symbol) => [#t|#f] |
| 1407 | ;;; (module-bound? module symbol) => [#t|#f] |
| 1408 | ;;; (module-symbol-locally-interned? module symbol) => [#t|#f] |
| 1409 | ;;; (module-symbol-interned? module symbol) => [#t|#f] |
| 1410 | ;;; (module-local-variable module symbol) => [#<variable ...> | #f] |
| 1411 | ;;; (module-variable module symbol) => [#<variable ...> | #f] |
| 1412 | ;;; (module-symbol-binding module symbol opt-value) |
| 1413 | ;;; => [ <obj> | opt-value | an error occurs ] |
| 1414 | ;;; (module-make-local-var! module symbol) => #<variable...> |
| 1415 | ;;; (module-add! module symbol var) => unspecified |
| 1416 | ;;; (module-remove! module symbol) => unspecified |
| 1417 | ;;; (module-for-each proc module) => unspecified |
| 1418 | ;;; (make-scm-module) => module ; a lazy copy of the symhash module |
| 1419 | ;;; (set-current-module module) => unspecified |
| 1420 | ;;; (current-module) => #<module...> |
| 1421 | ;;; |
| 1422 | ;;; |
| 1423 | |
| 1424 | \f |
| 1425 | |
| 1426 | ;;; {Printing Modules} |
| 1427 | ;;; |
| 1428 | |
| 1429 | ;; This is how modules are printed. You can re-define it. |
| 1430 | (define (%print-module mod port) |
| 1431 | (display "#<" port) |
| 1432 | (display (or (module-kind mod) "module") port) |
| 1433 | (display " " port) |
| 1434 | (display (module-name mod) port) |
| 1435 | (display " " port) |
| 1436 | (display (number->string (object-address mod) 16) port) |
| 1437 | (display ">" port)) |
| 1438 | |
| 1439 | (letrec-syntax |
| 1440 | ;; Locally extend the syntax to allow record accessors to be defined at |
| 1441 | ;; compile-time. Cache the rtd locally to the constructor, the getters and |
| 1442 | ;; the setters, in order to allow for redefinition of the record type; not |
| 1443 | ;; relevant in the case of modules, but perhaps if we make this public, it |
| 1444 | ;; could matter. |
| 1445 | |
| 1446 | ((define-record-type |
| 1447 | (lambda (x) |
| 1448 | (define (make-id scope . fragments) |
| 1449 | (datum->syntax #'scope |
| 1450 | (apply symbol-append |
| 1451 | (map (lambda (x) |
| 1452 | (if (symbol? x) x (syntax->datum x))) |
| 1453 | fragments)))) |
| 1454 | |
| 1455 | (define (getter rtd type-name field slot) |
| 1456 | #`(define #,(make-id rtd type-name '- field) |
| 1457 | (let ((rtd #,rtd)) |
| 1458 | (lambda (#,type-name) |
| 1459 | (if (eq? (struct-vtable #,type-name) rtd) |
| 1460 | (struct-ref #,type-name #,slot) |
| 1461 | (%record-type-error rtd #,type-name)))))) |
| 1462 | |
| 1463 | (define (setter rtd type-name field slot) |
| 1464 | #`(define #,(make-id rtd 'set- type-name '- field '!) |
| 1465 | (let ((rtd #,rtd)) |
| 1466 | (lambda (#,type-name val) |
| 1467 | (if (eq? (struct-vtable #,type-name) rtd) |
| 1468 | (struct-set! #,type-name #,slot val) |
| 1469 | (%record-type-error rtd #,type-name)))))) |
| 1470 | |
| 1471 | (define (accessors rtd type-name fields n exp) |
| 1472 | (syntax-case fields () |
| 1473 | (() exp) |
| 1474 | (((field #:no-accessors) field* ...) (identifier? #'field) |
| 1475 | (accessors rtd type-name #'(field* ...) (1+ n) |
| 1476 | exp)) |
| 1477 | (((field #:no-setter) field* ...) (identifier? #'field) |
| 1478 | (accessors rtd type-name #'(field* ...) (1+ n) |
| 1479 | #`(begin #,exp |
| 1480 | #,(getter rtd type-name #'field n)))) |
| 1481 | (((field #:no-getter) field* ...) (identifier? #'field) |
| 1482 | (accessors rtd type-name #'(field* ...) (1+ n) |
| 1483 | #`(begin #,exp |
| 1484 | #,(setter rtd type-name #'field n)))) |
| 1485 | ((field field* ...) (identifier? #'field) |
| 1486 | (accessors rtd type-name #'(field* ...) (1+ n) |
| 1487 | #`(begin #,exp |
| 1488 | #,(getter rtd type-name #'field n) |
| 1489 | #,(setter rtd type-name #'field n)))))) |
| 1490 | |
| 1491 | (define (predicate rtd type-name fields exp) |
| 1492 | (accessors |
| 1493 | rtd type-name fields 0 |
| 1494 | #`(begin |
| 1495 | #,exp |
| 1496 | (define (#,(make-id rtd type-name '?) obj) |
| 1497 | (and (struct? obj) (eq? (struct-vtable obj) #,rtd)))))) |
| 1498 | |
| 1499 | (define (field-list fields) |
| 1500 | (syntax-case fields () |
| 1501 | (() '()) |
| 1502 | (((f . opts) . rest) (identifier? #'f) |
| 1503 | (cons #'f (field-list #'rest))) |
| 1504 | ((f . rest) (identifier? #'f) |
| 1505 | (cons #'f (field-list #'rest))))) |
| 1506 | |
| 1507 | (define (constructor rtd type-name fields exp) |
| 1508 | (let ((ctor (make-id rtd type-name '-constructor)) |
| 1509 | (args (field-list fields))) |
| 1510 | (predicate rtd type-name fields |
| 1511 | #`(begin #,exp |
| 1512 | (define #,ctor |
| 1513 | (let ((rtd #,rtd)) |
| 1514 | (lambda #,args |
| 1515 | (make-struct rtd 0 #,@args)))) |
| 1516 | (struct-set! #,rtd (+ vtable-offset-user 2) |
| 1517 | #,ctor))))) |
| 1518 | |
| 1519 | (define (type type-name printer fields) |
| 1520 | (define (make-layout) |
| 1521 | (let lp ((fields fields) (slots '())) |
| 1522 | (syntax-case fields () |
| 1523 | (() (datum->syntax #'here |
| 1524 | (make-struct-layout |
| 1525 | (apply string-append slots)))) |
| 1526 | ((_ . rest) (lp #'rest (cons "pw" slots)))))) |
| 1527 | |
| 1528 | (let ((rtd (make-id type-name type-name '-type))) |
| 1529 | (constructor rtd type-name fields |
| 1530 | #`(begin |
| 1531 | (define #,rtd |
| 1532 | (make-struct record-type-vtable 0 |
| 1533 | '#,(make-layout) |
| 1534 | #,printer |
| 1535 | '#,type-name |
| 1536 | '#,(field-list fields))) |
| 1537 | (set-struct-vtable-name! #,rtd '#,type-name))))) |
| 1538 | |
| 1539 | (syntax-case x () |
| 1540 | ((_ type-name printer (field ...)) |
| 1541 | (type #'type-name #'printer #'(field ...))))))) |
| 1542 | |
| 1543 | ;; module-type |
| 1544 | ;; |
| 1545 | ;; A module is characterized by an obarray in which local symbols |
| 1546 | ;; are interned, a list of modules, "uses", from which non-local |
| 1547 | ;; bindings can be inherited, and an optional lazy-binder which |
| 1548 | ;; is a (CLOSURE module symbol) which, as a last resort, can provide |
| 1549 | ;; bindings that would otherwise not be found locally in the module. |
| 1550 | ;; |
| 1551 | ;; NOTE: If you change the set of fields or their order, you also need to |
| 1552 | ;; change the constants in libguile/modules.h. |
| 1553 | ;; |
| 1554 | ;; NOTE: The getter `module-eval-closure' is used in libguile/modules.c. |
| 1555 | ;; NOTE: The getter `module-transfomer' is defined libguile/modules.c. |
| 1556 | ;; NOTE: The getter `module-name' is defined later, due to boot reasons. |
| 1557 | ;; NOTE: The getter `module-public-interface' is used in libguile/modules.c. |
| 1558 | ;; |
| 1559 | (define-record-type module |
| 1560 | (lambda (obj port) (%print-module obj port)) |
| 1561 | (obarray |
| 1562 | uses |
| 1563 | binder |
| 1564 | eval-closure |
| 1565 | (transformer #:no-getter) |
| 1566 | (name #:no-getter) |
| 1567 | kind |
| 1568 | duplicates-handlers |
| 1569 | (import-obarray #:no-setter) |
| 1570 | observers |
| 1571 | (weak-observers #:no-setter) |
| 1572 | version |
| 1573 | submodules |
| 1574 | submodule-binder |
| 1575 | public-interface))) |
| 1576 | |
| 1577 | |
| 1578 | ;; make-module &opt size uses binder |
| 1579 | ;; |
| 1580 | ;; Create a new module, perhaps with a particular size of obarray, |
| 1581 | ;; initial uses list, or binding procedure. |
| 1582 | ;; |
| 1583 | (define make-module |
| 1584 | (lambda args |
| 1585 | |
| 1586 | (define (parse-arg index default) |
| 1587 | (if (> (length args) index) |
| 1588 | (list-ref args index) |
| 1589 | default)) |
| 1590 | |
| 1591 | (define %default-import-size |
| 1592 | ;; Typical number of imported bindings actually used by a module. |
| 1593 | 600) |
| 1594 | |
| 1595 | (if (> (length args) 3) |
| 1596 | (error "Too many args to make-module." args)) |
| 1597 | |
| 1598 | (let ((size (parse-arg 0 31)) |
| 1599 | (uses (parse-arg 1 '())) |
| 1600 | (binder (parse-arg 2 #f))) |
| 1601 | |
| 1602 | (if (not (integer? size)) |
| 1603 | (error "Illegal size to make-module." size)) |
| 1604 | (if (not (and (list? uses) |
| 1605 | (and-map module? uses))) |
| 1606 | (error "Incorrect use list." uses)) |
| 1607 | (if (and binder (not (procedure? binder))) |
| 1608 | (error |
| 1609 | "Lazy-binder expected to be a procedure or #f." binder)) |
| 1610 | |
| 1611 | (let ((module (module-constructor (make-hash-table size) |
| 1612 | uses binder #f macroexpand |
| 1613 | #f #f #f |
| 1614 | (make-hash-table %default-import-size) |
| 1615 | '() |
| 1616 | (make-weak-key-hash-table 31) #f |
| 1617 | (make-hash-table 7) #f #f))) |
| 1618 | |
| 1619 | ;; We can't pass this as an argument to module-constructor, |
| 1620 | ;; because we need it to close over a pointer to the module |
| 1621 | ;; itself. |
| 1622 | (set-module-eval-closure! module (standard-eval-closure module)) |
| 1623 | |
| 1624 | module)))) |
| 1625 | |
| 1626 | |
| 1627 | \f |
| 1628 | |
| 1629 | ;;; {Observer protocol} |
| 1630 | ;;; |
| 1631 | |
| 1632 | (define (module-observe module proc) |
| 1633 | (set-module-observers! module (cons proc (module-observers module))) |
| 1634 | (cons module proc)) |
| 1635 | |
| 1636 | (define (module-observe-weak module observer-id . proc) |
| 1637 | ;; Register PROC as an observer of MODULE under name OBSERVER-ID (which can |
| 1638 | ;; be any Scheme object). PROC is invoked and passed MODULE any time |
| 1639 | ;; MODULE is modified. PROC gets unregistered when OBSERVER-ID gets GC'd |
| 1640 | ;; (thus, it is never unregistered if OBSERVER-ID is an immediate value, |
| 1641 | ;; for instance). |
| 1642 | |
| 1643 | ;; The two-argument version is kept for backward compatibility: when called |
| 1644 | ;; with two arguments, the observer gets unregistered when closure PROC |
| 1645 | ;; gets GC'd (making it impossible to use an anonymous lambda for PROC). |
| 1646 | |
| 1647 | (let ((proc (if (null? proc) observer-id (car proc)))) |
| 1648 | (hashq-set! (module-weak-observers module) observer-id proc))) |
| 1649 | |
| 1650 | (define (module-unobserve token) |
| 1651 | (let ((module (car token)) |
| 1652 | (id (cdr token))) |
| 1653 | (if (integer? id) |
| 1654 | (hash-remove! (module-weak-observers module) id) |
| 1655 | (set-module-observers! module (delq1! id (module-observers module))))) |
| 1656 | *unspecified*) |
| 1657 | |
| 1658 | (define module-defer-observers #f) |
| 1659 | (define module-defer-observers-mutex (make-mutex 'recursive)) |
| 1660 | (define module-defer-observers-table (make-hash-table)) |
| 1661 | |
| 1662 | (define (module-modified m) |
| 1663 | (if module-defer-observers |
| 1664 | (hash-set! module-defer-observers-table m #t) |
| 1665 | (module-call-observers m))) |
| 1666 | |
| 1667 | ;;; This function can be used to delay calls to observers so that they |
| 1668 | ;;; can be called once only in the face of massive updating of modules. |
| 1669 | ;;; |
| 1670 | (define (call-with-deferred-observers thunk) |
| 1671 | (dynamic-wind |
| 1672 | (lambda () |
| 1673 | (lock-mutex module-defer-observers-mutex) |
| 1674 | (set! module-defer-observers #t)) |
| 1675 | thunk |
| 1676 | (lambda () |
| 1677 | (set! module-defer-observers #f) |
| 1678 | (hash-for-each (lambda (m dummy) |
| 1679 | (module-call-observers m)) |
| 1680 | module-defer-observers-table) |
| 1681 | (hash-clear! module-defer-observers-table) |
| 1682 | (unlock-mutex module-defer-observers-mutex)))) |
| 1683 | |
| 1684 | (define (module-call-observers m) |
| 1685 | (for-each (lambda (proc) (proc m)) (module-observers m)) |
| 1686 | |
| 1687 | ;; We assume that weak observers don't (un)register themselves as they are |
| 1688 | ;; called since this would preclude proper iteration over the hash table |
| 1689 | ;; elements. |
| 1690 | (hash-for-each (lambda (id proc) (proc m)) (module-weak-observers m))) |
| 1691 | |
| 1692 | \f |
| 1693 | |
| 1694 | ;;; {Module Searching in General} |
| 1695 | ;;; |
| 1696 | ;;; We sometimes want to look for properties of a symbol |
| 1697 | ;;; just within the obarray of one module. If the property |
| 1698 | ;;; holds, then it is said to hold ``locally'' as in, ``The symbol |
| 1699 | ;;; DISPLAY is locally rebound in the module `safe-guile'.'' |
| 1700 | ;;; |
| 1701 | ;;; |
| 1702 | ;;; Other times, we want to test for a symbol property in the obarray |
| 1703 | ;;; of M and, if it is not found there, try each of the modules in the |
| 1704 | ;;; uses list of M. This is the normal way of testing for some |
| 1705 | ;;; property, so we state these properties without qualification as |
| 1706 | ;;; in: ``The symbol 'fnord is interned in module M because it is |
| 1707 | ;;; interned locally in module M2 which is a member of the uses list |
| 1708 | ;;; of M.'' |
| 1709 | ;;; |
| 1710 | |
| 1711 | ;; module-search fn m |
| 1712 | ;; |
| 1713 | ;; return the first non-#f result of FN applied to M and then to |
| 1714 | ;; the modules in the uses of m, and so on recursively. If all applications |
| 1715 | ;; return #f, then so does this function. |
| 1716 | ;; |
| 1717 | (define (module-search fn m v) |
| 1718 | (define (loop pos) |
| 1719 | (and (pair? pos) |
| 1720 | (or (module-search fn (car pos) v) |
| 1721 | (loop (cdr pos))))) |
| 1722 | (or (fn m v) |
| 1723 | (loop (module-uses m)))) |
| 1724 | |
| 1725 | |
| 1726 | ;;; {Is a symbol bound in a module?} |
| 1727 | ;;; |
| 1728 | ;;; Symbol S in Module M is bound if S is interned in M and if the binding |
| 1729 | ;;; of S in M has been set to some well-defined value. |
| 1730 | ;;; |
| 1731 | |
| 1732 | ;; module-locally-bound? module symbol |
| 1733 | ;; |
| 1734 | ;; Is a symbol bound (interned and defined) locally in a given module? |
| 1735 | ;; |
| 1736 | (define (module-locally-bound? m v) |
| 1737 | (let ((var (module-local-variable m v))) |
| 1738 | (and var |
| 1739 | (variable-bound? var)))) |
| 1740 | |
| 1741 | ;; module-bound? module symbol |
| 1742 | ;; |
| 1743 | ;; Is a symbol bound (interned and defined) anywhere in a given module |
| 1744 | ;; or its uses? |
| 1745 | ;; |
| 1746 | (define (module-bound? m v) |
| 1747 | (let ((var (module-variable m v))) |
| 1748 | (and var |
| 1749 | (variable-bound? var)))) |
| 1750 | |
| 1751 | ;;; {Is a symbol interned in a module?} |
| 1752 | ;;; |
| 1753 | ;;; Symbol S in Module M is interned if S occurs in |
| 1754 | ;;; of S in M has been set to some well-defined value. |
| 1755 | ;;; |
| 1756 | ;;; It is possible to intern a symbol in a module without providing |
| 1757 | ;;; an initial binding for the corresponding variable. This is done |
| 1758 | ;;; with: |
| 1759 | ;;; (module-add! module symbol (make-undefined-variable)) |
| 1760 | ;;; |
| 1761 | ;;; In that case, the symbol is interned in the module, but not |
| 1762 | ;;; bound there. The unbound symbol shadows any binding for that |
| 1763 | ;;; symbol that might otherwise be inherited from a member of the uses list. |
| 1764 | ;;; |
| 1765 | |
| 1766 | (define (module-obarray-get-handle ob key) |
| 1767 | ((if (symbol? key) hashq-get-handle hash-get-handle) ob key)) |
| 1768 | |
| 1769 | (define (module-obarray-ref ob key) |
| 1770 | ((if (symbol? key) hashq-ref hash-ref) ob key)) |
| 1771 | |
| 1772 | (define (module-obarray-set! ob key val) |
| 1773 | ((if (symbol? key) hashq-set! hash-set!) ob key val)) |
| 1774 | |
| 1775 | (define (module-obarray-remove! ob key) |
| 1776 | ((if (symbol? key) hashq-remove! hash-remove!) ob key)) |
| 1777 | |
| 1778 | ;; module-symbol-locally-interned? module symbol |
| 1779 | ;; |
| 1780 | ;; is a symbol interned (not neccessarily defined) locally in a given module |
| 1781 | ;; or its uses? Interned symbols shadow inherited bindings even if |
| 1782 | ;; they are not themselves bound to a defined value. |
| 1783 | ;; |
| 1784 | (define (module-symbol-locally-interned? m v) |
| 1785 | (not (not (module-obarray-get-handle (module-obarray m) v)))) |
| 1786 | |
| 1787 | ;; module-symbol-interned? module symbol |
| 1788 | ;; |
| 1789 | ;; is a symbol interned (not neccessarily defined) anywhere in a given module |
| 1790 | ;; or its uses? Interned symbols shadow inherited bindings even if |
| 1791 | ;; they are not themselves bound to a defined value. |
| 1792 | ;; |
| 1793 | (define (module-symbol-interned? m v) |
| 1794 | (module-search module-symbol-locally-interned? m v)) |
| 1795 | |
| 1796 | |
| 1797 | ;;; {Mapping modules x symbols --> variables} |
| 1798 | ;;; |
| 1799 | |
| 1800 | ;; module-local-variable module symbol |
| 1801 | ;; return the local variable associated with a MODULE and SYMBOL. |
| 1802 | ;; |
| 1803 | ;;; This function is very important. It is the only function that can |
| 1804 | ;;; return a variable from a module other than the mutators that store |
| 1805 | ;;; new variables in modules. Therefore, this function is the location |
| 1806 | ;;; of the "lazy binder" hack. |
| 1807 | ;;; |
| 1808 | ;;; If symbol is defined in MODULE, and if the definition binds symbol |
| 1809 | ;;; to a variable, return that variable object. |
| 1810 | ;;; |
| 1811 | ;;; If the symbols is not found at first, but the module has a lazy binder, |
| 1812 | ;;; then try the binder. |
| 1813 | ;;; |
| 1814 | ;;; If the symbol is not found at all, return #f. |
| 1815 | ;;; |
| 1816 | ;;; (This is now written in C, see `modules.c'.) |
| 1817 | ;;; |
| 1818 | |
| 1819 | ;;; {Mapping modules x symbols --> bindings} |
| 1820 | ;;; |
| 1821 | ;;; These are similar to the mapping to variables, except that the |
| 1822 | ;;; variable is dereferenced. |
| 1823 | ;;; |
| 1824 | |
| 1825 | ;; module-symbol-binding module symbol opt-value |
| 1826 | ;; |
| 1827 | ;; return the binding of a variable specified by name within |
| 1828 | ;; a given module, signalling an error if the variable is unbound. |
| 1829 | ;; If the OPT-VALUE is passed, then instead of signalling an error, |
| 1830 | ;; return OPT-VALUE. |
| 1831 | ;; |
| 1832 | (define (module-symbol-local-binding m v . opt-val) |
| 1833 | (let ((var (module-local-variable m v))) |
| 1834 | (if (and var (variable-bound? var)) |
| 1835 | (variable-ref var) |
| 1836 | (if (not (null? opt-val)) |
| 1837 | (car opt-val) |
| 1838 | (error "Locally unbound variable." v))))) |
| 1839 | |
| 1840 | ;; module-symbol-binding module symbol opt-value |
| 1841 | ;; |
| 1842 | ;; return the binding of a variable specified by name within |
| 1843 | ;; a given module, signalling an error if the variable is unbound. |
| 1844 | ;; If the OPT-VALUE is passed, then instead of signalling an error, |
| 1845 | ;; return OPT-VALUE. |
| 1846 | ;; |
| 1847 | (define (module-symbol-binding m v . opt-val) |
| 1848 | (let ((var (module-variable m v))) |
| 1849 | (if (and var (variable-bound? var)) |
| 1850 | (variable-ref var) |
| 1851 | (if (not (null? opt-val)) |
| 1852 | (car opt-val) |
| 1853 | (error "Unbound variable." v))))) |
| 1854 | |
| 1855 | |
| 1856 | \f |
| 1857 | |
| 1858 | ;;; {Adding Variables to Modules} |
| 1859 | ;;; |
| 1860 | |
| 1861 | ;; module-make-local-var! module symbol |
| 1862 | ;; |
| 1863 | ;; ensure a variable for V in the local namespace of M. |
| 1864 | ;; If no variable was already there, then create a new and uninitialzied |
| 1865 | ;; variable. |
| 1866 | ;; |
| 1867 | ;; This function is used in modules.c. |
| 1868 | ;; |
| 1869 | (define (module-make-local-var! m v) |
| 1870 | (or (let ((b (module-obarray-ref (module-obarray m) v))) |
| 1871 | (and (variable? b) |
| 1872 | (begin |
| 1873 | ;; Mark as modified since this function is called when |
| 1874 | ;; the standard eval closure defines a binding |
| 1875 | (module-modified m) |
| 1876 | b))) |
| 1877 | |
| 1878 | ;; Create a new local variable. |
| 1879 | (let ((local-var (make-undefined-variable))) |
| 1880 | (module-add! m v local-var) |
| 1881 | local-var))) |
| 1882 | |
| 1883 | ;; module-ensure-local-variable! module symbol |
| 1884 | ;; |
| 1885 | ;; Ensure that there is a local variable in MODULE for SYMBOL. If |
| 1886 | ;; there is no binding for SYMBOL, create a new uninitialized |
| 1887 | ;; variable. Return the local variable. |
| 1888 | ;; |
| 1889 | (define (module-ensure-local-variable! module symbol) |
| 1890 | (or (module-local-variable module symbol) |
| 1891 | (let ((var (make-undefined-variable))) |
| 1892 | (module-add! module symbol var) |
| 1893 | var))) |
| 1894 | |
| 1895 | ;; module-add! module symbol var |
| 1896 | ;; |
| 1897 | ;; ensure a particular variable for V in the local namespace of M. |
| 1898 | ;; |
| 1899 | (define (module-add! m v var) |
| 1900 | (if (not (variable? var)) |
| 1901 | (error "Bad variable to module-add!" var)) |
| 1902 | (module-obarray-set! (module-obarray m) v var) |
| 1903 | (module-modified m)) |
| 1904 | |
| 1905 | ;; module-remove! |
| 1906 | ;; |
| 1907 | ;; make sure that a symbol is undefined in the local namespace of M. |
| 1908 | ;; |
| 1909 | (define (module-remove! m v) |
| 1910 | (module-obarray-remove! (module-obarray m) v) |
| 1911 | (module-modified m)) |
| 1912 | |
| 1913 | (define (module-clear! m) |
| 1914 | (hash-clear! (module-obarray m)) |
| 1915 | (module-modified m)) |
| 1916 | |
| 1917 | ;; MODULE-FOR-EACH -- exported |
| 1918 | ;; |
| 1919 | ;; Call PROC on each symbol in MODULE, with arguments of (SYMBOL VARIABLE). |
| 1920 | ;; |
| 1921 | (define (module-for-each proc module) |
| 1922 | (hash-for-each proc (module-obarray module))) |
| 1923 | |
| 1924 | (define (module-map proc module) |
| 1925 | (hash-map->list proc (module-obarray module))) |
| 1926 | |
| 1927 | ;; Submodules |
| 1928 | ;; |
| 1929 | ;; Modules exist in a separate namespace from values, because you generally do |
| 1930 | ;; not want the name of a submodule, which you might not even use, to collide |
| 1931 | ;; with local variables that happen to be named the same as the submodule. |
| 1932 | ;; |
| 1933 | (define (module-ref-submodule module name) |
| 1934 | (or (hashq-ref (module-submodules module) name) |
| 1935 | (and (module-submodule-binder module) |
| 1936 | ((module-submodule-binder module) module name)))) |
| 1937 | |
| 1938 | (define (module-define-submodule! module name submodule) |
| 1939 | (hashq-set! (module-submodules module) name submodule)) |
| 1940 | |
| 1941 | \f |
| 1942 | |
| 1943 | ;;; {Low Level Bootstrapping} |
| 1944 | ;;; |
| 1945 | |
| 1946 | ;; make-root-module |
| 1947 | |
| 1948 | ;; A root module uses the pre-modules-obarray as its obarray. This |
| 1949 | ;; special obarray accumulates all bindings that have been established |
| 1950 | ;; before the module system is fully booted. |
| 1951 | ;; |
| 1952 | ;; (The obarray continues to be used by code that has been closed over |
| 1953 | ;; before the module system has been booted.) |
| 1954 | |
| 1955 | (define (make-root-module) |
| 1956 | (let ((m (make-module 0))) |
| 1957 | (set-module-obarray! m (%get-pre-modules-obarray)) |
| 1958 | m)) |
| 1959 | |
| 1960 | ;; make-scm-module |
| 1961 | |
| 1962 | ;; The root interface is a module that uses the same obarray as the |
| 1963 | ;; root module. It does not allow new definitions, tho. |
| 1964 | |
| 1965 | (define (make-scm-module) |
| 1966 | (let ((m (make-module 0))) |
| 1967 | (set-module-obarray! m (%get-pre-modules-obarray)) |
| 1968 | (set-module-eval-closure! m (standard-interface-eval-closure m)) |
| 1969 | m)) |
| 1970 | |
| 1971 | |
| 1972 | \f |
| 1973 | |
| 1974 | ;;; {Module-based Loading} |
| 1975 | ;;; |
| 1976 | |
| 1977 | (define (save-module-excursion thunk) |
| 1978 | (let ((inner-module (current-module)) |
| 1979 | (outer-module #f)) |
| 1980 | (dynamic-wind (lambda () |
| 1981 | (set! outer-module (current-module)) |
| 1982 | (set-current-module inner-module) |
| 1983 | (set! inner-module #f)) |
| 1984 | thunk |
| 1985 | (lambda () |
| 1986 | (set! inner-module (current-module)) |
| 1987 | (set-current-module outer-module) |
| 1988 | (set! outer-module #f))))) |
| 1989 | |
| 1990 | (define basic-load load) |
| 1991 | |
| 1992 | (define (load-module filename . reader) |
| 1993 | (save-module-excursion |
| 1994 | (lambda () |
| 1995 | (let ((oldname (and (current-load-port) |
| 1996 | (port-filename (current-load-port))))) |
| 1997 | (apply basic-load |
| 1998 | (if (and oldname |
| 1999 | (> (string-length filename) 0) |
| 2000 | (not (char=? (string-ref filename 0) #\/)) |
| 2001 | (not (string=? (dirname oldname) "."))) |
| 2002 | (string-append (dirname oldname) "/" filename) |
| 2003 | filename) |
| 2004 | reader))))) |
| 2005 | |
| 2006 | |
| 2007 | \f |
| 2008 | |
| 2009 | ;;; {MODULE-REF -- exported} |
| 2010 | ;;; |
| 2011 | |
| 2012 | ;; Returns the value of a variable called NAME in MODULE or any of its |
| 2013 | ;; used modules. If there is no such variable, then if the optional third |
| 2014 | ;; argument DEFAULT is present, it is returned; otherwise an error is signaled. |
| 2015 | ;; |
| 2016 | (define (module-ref module name . rest) |
| 2017 | (let ((variable (module-variable module name))) |
| 2018 | (if (and variable (variable-bound? variable)) |
| 2019 | (variable-ref variable) |
| 2020 | (if (null? rest) |
| 2021 | (error "No variable named" name 'in module) |
| 2022 | (car rest) ; default value |
| 2023 | )))) |
| 2024 | |
| 2025 | ;; MODULE-SET! -- exported |
| 2026 | ;; |
| 2027 | ;; Sets the variable called NAME in MODULE (or in a module that MODULE uses) |
| 2028 | ;; to VALUE; if there is no such variable, an error is signaled. |
| 2029 | ;; |
| 2030 | (define (module-set! module name value) |
| 2031 | (let ((variable (module-variable module name))) |
| 2032 | (if variable |
| 2033 | (variable-set! variable value) |
| 2034 | (error "No variable named" name 'in module)))) |
| 2035 | |
| 2036 | ;; MODULE-DEFINE! -- exported |
| 2037 | ;; |
| 2038 | ;; Sets the variable called NAME in MODULE to VALUE; if there is no such |
| 2039 | ;; variable, it is added first. |
| 2040 | ;; |
| 2041 | (define (module-define! module name value) |
| 2042 | (let ((variable (module-local-variable module name))) |
| 2043 | (if variable |
| 2044 | (begin |
| 2045 | (variable-set! variable value) |
| 2046 | (module-modified module)) |
| 2047 | (let ((variable (make-variable value))) |
| 2048 | (module-add! module name variable))))) |
| 2049 | |
| 2050 | ;; MODULE-DEFINED? -- exported |
| 2051 | ;; |
| 2052 | ;; Return #t iff NAME is defined in MODULE (or in a module that MODULE |
| 2053 | ;; uses) |
| 2054 | ;; |
| 2055 | (define (module-defined? module name) |
| 2056 | (let ((variable (module-variable module name))) |
| 2057 | (and variable (variable-bound? variable)))) |
| 2058 | |
| 2059 | ;; MODULE-USE! module interface |
| 2060 | ;; |
| 2061 | ;; Add INTERFACE to the list of interfaces used by MODULE. |
| 2062 | ;; |
| 2063 | (define (module-use! module interface) |
| 2064 | (if (not (or (eq? module interface) |
| 2065 | (memq interface (module-uses module)))) |
| 2066 | (begin |
| 2067 | ;; Newly used modules must be appended rather than consed, so that |
| 2068 | ;; `module-variable' traverses the use list starting from the first |
| 2069 | ;; used module. |
| 2070 | (set-module-uses! module |
| 2071 | (append (filter (lambda (m) |
| 2072 | (not |
| 2073 | (equal? (module-name m) |
| 2074 | (module-name interface)))) |
| 2075 | (module-uses module)) |
| 2076 | (list interface))) |
| 2077 | (hash-clear! (module-import-obarray module)) |
| 2078 | (module-modified module)))) |
| 2079 | |
| 2080 | ;; MODULE-USE-INTERFACES! module interfaces |
| 2081 | ;; |
| 2082 | ;; Same as MODULE-USE! but add multiple interfaces and check for duplicates |
| 2083 | ;; |
| 2084 | (define (module-use-interfaces! module interfaces) |
| 2085 | (set-module-uses! module |
| 2086 | (append (module-uses module) interfaces)) |
| 2087 | (hash-clear! (module-import-obarray module)) |
| 2088 | (module-modified module)) |
| 2089 | |
| 2090 | \f |
| 2091 | |
| 2092 | ;;; {Recursive Namespaces} |
| 2093 | ;;; |
| 2094 | ;;; A hierarchical namespace emerges if we consider some module to be |
| 2095 | ;;; root, and submodules of that module to be nested namespaces. |
| 2096 | ;;; |
| 2097 | ;;; The routines here manage variable names in hierarchical namespace. |
| 2098 | ;;; Each variable name is a list of elements, looked up in successively nested |
| 2099 | ;;; modules. |
| 2100 | ;;; |
| 2101 | ;;; (nested-ref some-root-module '(foo bar baz)) |
| 2102 | ;;; => <value of a variable named baz in the submodule bar of |
| 2103 | ;;; the submodule foo of some-root-module> |
| 2104 | ;;; |
| 2105 | ;;; |
| 2106 | ;;; There are: |
| 2107 | ;;; |
| 2108 | ;;; ;; a-root is a module |
| 2109 | ;;; ;; name is a list of symbols |
| 2110 | ;;; |
| 2111 | ;;; nested-ref a-root name |
| 2112 | ;;; nested-set! a-root name val |
| 2113 | ;;; nested-define! a-root name val |
| 2114 | ;;; nested-remove! a-root name |
| 2115 | ;;; |
| 2116 | ;;; These functions manipulate values in namespaces. For referencing the |
| 2117 | ;;; namespaces themselves, use the following: |
| 2118 | ;;; |
| 2119 | ;;; nested-ref-module a-root name |
| 2120 | ;;; nested-define-module! a-root name mod |
| 2121 | ;;; |
| 2122 | ;;; (current-module) is a natural choice for a root so for convenience there are |
| 2123 | ;;; also: |
| 2124 | ;;; |
| 2125 | ;;; local-ref name == nested-ref (current-module) name |
| 2126 | ;;; local-set! name val == nested-set! (current-module) name val |
| 2127 | ;;; local-define name val == nested-define! (current-module) name val |
| 2128 | ;;; local-remove name == nested-remove! (current-module) name |
| 2129 | ;;; local-ref-module name == nested-ref-module (current-module) name |
| 2130 | ;;; local-define-module! name m == nested-define-module! (current-module) name m |
| 2131 | ;;; |
| 2132 | |
| 2133 | |
| 2134 | (define (nested-ref root names) |
| 2135 | (if (null? names) |
| 2136 | root |
| 2137 | (let loop ((cur root) |
| 2138 | (head (car names)) |
| 2139 | (tail (cdr names))) |
| 2140 | (if (null? tail) |
| 2141 | (module-ref cur head #f) |
| 2142 | (let ((cur (module-ref-submodule cur head))) |
| 2143 | (and cur |
| 2144 | (loop cur (car tail) (cdr tail)))))))) |
| 2145 | |
| 2146 | (define (nested-set! root names val) |
| 2147 | (let loop ((cur root) |
| 2148 | (head (car names)) |
| 2149 | (tail (cdr names))) |
| 2150 | (if (null? tail) |
| 2151 | (module-set! cur head val) |
| 2152 | (let ((cur (module-ref-submodule cur head))) |
| 2153 | (if (not cur) |
| 2154 | (error "failed to resolve module" names) |
| 2155 | (loop cur (car tail) (cdr tail))))))) |
| 2156 | |
| 2157 | (define (nested-define! root names val) |
| 2158 | (let loop ((cur root) |
| 2159 | (head (car names)) |
| 2160 | (tail (cdr names))) |
| 2161 | (if (null? tail) |
| 2162 | (module-define! cur head val) |
| 2163 | (let ((cur (module-ref-submodule cur head))) |
| 2164 | (if (not cur) |
| 2165 | (error "failed to resolve module" names) |
| 2166 | (loop cur (car tail) (cdr tail))))))) |
| 2167 | |
| 2168 | (define (nested-remove! root names) |
| 2169 | (let loop ((cur root) |
| 2170 | (head (car names)) |
| 2171 | (tail (cdr names))) |
| 2172 | (if (null? tail) |
| 2173 | (module-remove! cur head) |
| 2174 | (let ((cur (module-ref-submodule cur head))) |
| 2175 | (if (not cur) |
| 2176 | (error "failed to resolve module" names) |
| 2177 | (loop cur (car tail) (cdr tail))))))) |
| 2178 | |
| 2179 | |
| 2180 | (define (nested-ref-module root names) |
| 2181 | (let loop ((cur root) |
| 2182 | (names names)) |
| 2183 | (if (null? names) |
| 2184 | cur |
| 2185 | (let ((cur (module-ref-submodule cur (car names)))) |
| 2186 | (and cur |
| 2187 | (loop cur (cdr names))))))) |
| 2188 | |
| 2189 | (define (nested-define-module! root names module) |
| 2190 | (if (null? names) |
| 2191 | (error "can't redefine root module" root module) |
| 2192 | (let loop ((cur root) |
| 2193 | (head (car names)) |
| 2194 | (tail (cdr names))) |
| 2195 | (if (null? tail) |
| 2196 | (module-define-submodule! cur head module) |
| 2197 | (let ((cur (or (module-ref-submodule cur head) |
| 2198 | (let ((m (make-module 31))) |
| 2199 | (set-module-kind! m 'directory) |
| 2200 | (set-module-name! m (append (module-name cur) |
| 2201 | (list head))) |
| 2202 | (module-define-submodule! cur head m) |
| 2203 | m)))) |
| 2204 | (loop cur (car tail) (cdr tail))))))) |
| 2205 | |
| 2206 | |
| 2207 | (define (local-ref names) (nested-ref (current-module) names)) |
| 2208 | (define (local-set! names val) (nested-set! (current-module) names val)) |
| 2209 | (define (local-define names val) (nested-define! (current-module) names val)) |
| 2210 | (define (local-remove names) (nested-remove! (current-module) names)) |
| 2211 | (define (local-ref-module names) (nested-ref-module (current-module) names)) |
| 2212 | (define (local-define-module names mod) (nested-define-module! (current-module) names mod)) |
| 2213 | |
| 2214 | |
| 2215 | |
| 2216 | \f |
| 2217 | |
| 2218 | ;;; {The (guile) module} |
| 2219 | ;;; |
| 2220 | ;;; The standard module, which has the core Guile bindings. Also called the |
| 2221 | ;;; "root module", as it is imported by many other modules, but it is not |
| 2222 | ;;; necessarily the root of anything; and indeed, the module named '() might be |
| 2223 | ;;; better thought of as a root. |
| 2224 | ;;; |
| 2225 | |
| 2226 | (define (set-system-module! m s) |
| 2227 | (set-procedure-property! (module-eval-closure m) 'system-module s)) |
| 2228 | (define the-root-module (make-root-module)) |
| 2229 | (define the-scm-module (make-scm-module)) |
| 2230 | (set-module-public-interface! the-root-module the-scm-module) |
| 2231 | (set-module-name! the-root-module '(guile)) |
| 2232 | (set-module-name! the-scm-module '(guile)) |
| 2233 | (set-module-kind! the-scm-module 'interface) |
| 2234 | (set-system-module! the-root-module #t) |
| 2235 | (set-system-module! the-scm-module #t) |
| 2236 | |
| 2237 | |
| 2238 | \f |
| 2239 | |
| 2240 | ;; Now that we have a root module, even though modules aren't fully booted, |
| 2241 | ;; expand the definition of resolve-module. |
| 2242 | ;; |
| 2243 | (define (resolve-module name . args) |
| 2244 | (if (equal? name '(guile)) |
| 2245 | the-root-module |
| 2246 | (error "unexpected module to resolve during module boot" name))) |
| 2247 | |
| 2248 | ;; Cheat. These bindings are needed by modules.c, but we don't want |
| 2249 | ;; to move their real definition here because that would be unnatural. |
| 2250 | ;; |
| 2251 | (define process-define-module #f) |
| 2252 | (define process-use-modules #f) |
| 2253 | (define module-export! #f) |
| 2254 | (define default-duplicate-binding-procedures #f) |
| 2255 | |
| 2256 | ;; This boots the module system. All bindings needed by modules.c |
| 2257 | ;; must have been defined by now. |
| 2258 | ;; |
| 2259 | (set-current-module the-root-module) |
| 2260 | |
| 2261 | |
| 2262 | \f |
| 2263 | |
| 2264 | ;; Now that modules are booted, give module-name its final definition. |
| 2265 | ;; |
| 2266 | (define module-name |
| 2267 | (let ((accessor (record-accessor module-type 'name))) |
| 2268 | (lambda (mod) |
| 2269 | (or (accessor mod) |
| 2270 | (let ((name (list (gensym)))) |
| 2271 | ;; Name MOD and bind it in the module root so that it's visible to |
| 2272 | ;; `resolve-module'. This is important as `psyntax' stores module |
| 2273 | ;; names and relies on being able to `resolve-module' them. |
| 2274 | (set-module-name! mod name) |
| 2275 | (nested-define-module! (resolve-module '() #f) name mod) |
| 2276 | (accessor mod)))))) |
| 2277 | |
| 2278 | (define (make-modules-in module name) |
| 2279 | (or (nested-ref-module module name) |
| 2280 | (let ((m (make-module 31))) |
| 2281 | (set-module-kind! m 'directory) |
| 2282 | (set-module-name! m (append (module-name module) name)) |
| 2283 | (nested-define-module! module name m) |
| 2284 | m))) |
| 2285 | |
| 2286 | (define (beautify-user-module! module) |
| 2287 | (let ((interface (module-public-interface module))) |
| 2288 | (if (or (not interface) |
| 2289 | (eq? interface module)) |
| 2290 | (let ((interface (make-module 31))) |
| 2291 | (set-module-name! interface (module-name module)) |
| 2292 | (set-module-version! interface (module-version module)) |
| 2293 | (set-module-kind! interface 'interface) |
| 2294 | (set-module-public-interface! module interface)))) |
| 2295 | (if (and (not (memq the-scm-module (module-uses module))) |
| 2296 | (not (eq? module the-root-module))) |
| 2297 | ;; Import the default set of bindings (from the SCM module) in MODULE. |
| 2298 | (module-use! module the-scm-module))) |
| 2299 | |
| 2300 | (define (version-matches? version-ref target) |
| 2301 | (define (any pred lst) |
| 2302 | (and (not (null? lst)) (or (pred (car lst)) (any pred (cdr lst))))) |
| 2303 | (define (every pred lst) |
| 2304 | (or (null? lst) (and (pred (car lst)) (every pred (cdr lst))))) |
| 2305 | (define (sub-versions-match? v-refs t) |
| 2306 | (define (sub-version-matches? v-ref t) |
| 2307 | (define (curried-sub-version-matches? v) |
| 2308 | (sub-version-matches? v t)) |
| 2309 | (cond ((number? v-ref) (eqv? v-ref t)) |
| 2310 | ((list? v-ref) |
| 2311 | (let ((cv (car v-ref))) |
| 2312 | (cond ((eq? cv '>=) (>= t (cadr v-ref))) |
| 2313 | ((eq? cv '<=) (<= t (cadr v-ref))) |
| 2314 | ((eq? cv 'and) |
| 2315 | (every curried-sub-version-matches? (cdr v-ref))) |
| 2316 | ((eq? cv 'or) |
| 2317 | (any curried-sub-version-matches? (cdr v-ref))) |
| 2318 | ((eq? cv 'not) (not (sub-version-matches? (cadr v-ref) t))) |
| 2319 | (else (error "Incompatible sub-version reference" cv))))) |
| 2320 | (else (error "Incompatible sub-version reference" v-ref)))) |
| 2321 | (or (null? v-refs) |
| 2322 | (and (not (null? t)) |
| 2323 | (sub-version-matches? (car v-refs) (car t)) |
| 2324 | (sub-versions-match? (cdr v-refs) (cdr t))))) |
| 2325 | (define (curried-version-matches? v) |
| 2326 | (version-matches? v target)) |
| 2327 | (or (null? version-ref) |
| 2328 | (let ((cv (car version-ref))) |
| 2329 | (cond ((eq? cv 'and) (every curried-version-matches? (cdr version-ref))) |
| 2330 | ((eq? cv 'or) (any curried-version-matches? (cdr version-ref))) |
| 2331 | ((eq? cv 'not) (not (version-matches? (cadr version-ref) target))) |
| 2332 | (else (sub-versions-match? version-ref target)))))) |
| 2333 | |
| 2334 | (define (find-versioned-module dir-hint name version-ref roots) |
| 2335 | (define (subdir-pair-less pair1 pair2) |
| 2336 | (define (numlist-less lst1 lst2) |
| 2337 | (or (null? lst2) |
| 2338 | (and (not (null? lst1)) |
| 2339 | (cond ((> (car lst1) (car lst2)) #t) |
| 2340 | ((< (car lst1) (car lst2)) #f) |
| 2341 | (else (numlist-less (cdr lst1) (cdr lst2))))))) |
| 2342 | (numlist-less (car pair1) (car pair2))) |
| 2343 | (define (match-version-and-file pair) |
| 2344 | (and (version-matches? version-ref (car pair)) |
| 2345 | (let ((filenames |
| 2346 | (filter (lambda (file) |
| 2347 | (let ((s (false-if-exception (stat file)))) |
| 2348 | (and s (eq? (stat:type s) 'regular)))) |
| 2349 | (map (lambda (ext) |
| 2350 | (string-append (cdr pair) "/" name ext)) |
| 2351 | %load-extensions)))) |
| 2352 | (and (not (null? filenames)) |
| 2353 | (cons (car pair) (car filenames)))))) |
| 2354 | |
| 2355 | (define (match-version-recursive root-pairs leaf-pairs) |
| 2356 | (define (filter-subdirs root-pairs ret) |
| 2357 | (define (filter-subdir root-pair dstrm subdir-pairs) |
| 2358 | (let ((entry (readdir dstrm))) |
| 2359 | (if (eof-object? entry) |
| 2360 | subdir-pairs |
| 2361 | (let* ((subdir (string-append (cdr root-pair) "/" entry)) |
| 2362 | (num (string->number entry)) |
| 2363 | (num (and num (append (car root-pair) (list num))))) |
| 2364 | (if (and num (eq? (stat:type (stat subdir)) 'directory)) |
| 2365 | (filter-subdir |
| 2366 | root-pair dstrm (cons (cons num subdir) subdir-pairs)) |
| 2367 | (filter-subdir root-pair dstrm subdir-pairs)))))) |
| 2368 | |
| 2369 | (or (and (null? root-pairs) ret) |
| 2370 | (let* ((rp (car root-pairs)) |
| 2371 | (dstrm (false-if-exception (opendir (cdr rp))))) |
| 2372 | (if dstrm |
| 2373 | (let ((subdir-pairs (filter-subdir rp dstrm '()))) |
| 2374 | (closedir dstrm) |
| 2375 | (filter-subdirs (cdr root-pairs) |
| 2376 | (or (and (null? subdir-pairs) ret) |
| 2377 | (append ret subdir-pairs)))) |
| 2378 | (filter-subdirs (cdr root-pairs) ret))))) |
| 2379 | |
| 2380 | (or (and (null? root-pairs) leaf-pairs) |
| 2381 | (let ((matching-subdir-pairs (filter-subdirs root-pairs '()))) |
| 2382 | (match-version-recursive |
| 2383 | matching-subdir-pairs |
| 2384 | (append leaf-pairs (filter pair? (map match-version-and-file |
| 2385 | matching-subdir-pairs))))))) |
| 2386 | (define (make-root-pair root) |
| 2387 | (cons '() (string-append root "/" dir-hint))) |
| 2388 | |
| 2389 | (let* ((root-pairs (map make-root-pair roots)) |
| 2390 | (matches (if (null? version-ref) |
| 2391 | (filter pair? (map match-version-and-file root-pairs)) |
| 2392 | '())) |
| 2393 | (matches (append matches (match-version-recursive root-pairs '())))) |
| 2394 | (and (null? matches) (error "No matching modules found.")) |
| 2395 | (cdar (sort matches subdir-pair-less)))) |
| 2396 | |
| 2397 | (define (make-fresh-user-module) |
| 2398 | (let ((m (make-module))) |
| 2399 | (beautify-user-module! m) |
| 2400 | m)) |
| 2401 | |
| 2402 | ;; NOTE: This binding is used in libguile/modules.c. |
| 2403 | ;; |
| 2404 | (define resolve-module |
| 2405 | (let ((root (make-module))) |
| 2406 | (set-module-name! root '()) |
| 2407 | ;; Define the-root-module as '(guile). |
| 2408 | (module-define-submodule! root 'guile the-root-module) |
| 2409 | |
| 2410 | (lambda (name . args) ;; #:optional (autoload #t) (version #f) |
| 2411 | (let* ((already (nested-ref-module root name)) |
| 2412 | (numargs (length args)) |
| 2413 | (autoload (or (= numargs 0) (car args))) |
| 2414 | (version (and (> numargs 1) (cadr args)))) |
| 2415 | (cond |
| 2416 | ((and already |
| 2417 | (or (not autoload) (module-public-interface already))) |
| 2418 | ;; A hit, a palpable hit. |
| 2419 | (if (and version |
| 2420 | (not (version-matches? version (module-version already)))) |
| 2421 | (error "incompatible module version already loaded" name)) |
| 2422 | already) |
| 2423 | (autoload |
| 2424 | ;; Try to autoload the module, and recurse. |
| 2425 | (try-load-module name version) |
| 2426 | (resolve-module name #f)) |
| 2427 | (else |
| 2428 | ;; No module found (or if one was, it had no public interface), and |
| 2429 | ;; we're not autoloading. Here's the weird semantics: we ensure |
| 2430 | ;; there's an empty module. |
| 2431 | (or already (make-modules-in root name)))))))) |
| 2432 | |
| 2433 | |
| 2434 | (define (try-load-module name version) |
| 2435 | (try-module-autoload name version)) |
| 2436 | |
| 2437 | (define (purify-module! module) |
| 2438 | "Removes bindings in MODULE which are inherited from the (guile) module." |
| 2439 | (let ((use-list (module-uses module))) |
| 2440 | (if (and (pair? use-list) |
| 2441 | (eq? (car (last-pair use-list)) the-scm-module)) |
| 2442 | (set-module-uses! module (reverse (cdr (reverse use-list))))))) |
| 2443 | |
| 2444 | ;; Return a module that is an interface to the module designated by |
| 2445 | ;; NAME. |
| 2446 | ;; |
| 2447 | ;; `resolve-interface' takes four keyword arguments: |
| 2448 | ;; |
| 2449 | ;; #:select SELECTION |
| 2450 | ;; |
| 2451 | ;; SELECTION is a list of binding-specs to be imported; A binding-spec |
| 2452 | ;; is either a symbol or a pair of symbols (ORIG . SEEN), where ORIG |
| 2453 | ;; is the name in the used module and SEEN is the name in the using |
| 2454 | ;; module. Note that SEEN is also passed through RENAMER, below. The |
| 2455 | ;; default is to select all bindings. If you specify no selection but |
| 2456 | ;; a renamer, only the bindings that already exist in the used module |
| 2457 | ;; are made available in the interface. Bindings that are added later |
| 2458 | ;; are not picked up. |
| 2459 | ;; |
| 2460 | ;; #:hide BINDINGS |
| 2461 | ;; |
| 2462 | ;; BINDINGS is a list of bindings which should not be imported. |
| 2463 | ;; |
| 2464 | ;; #:prefix PREFIX |
| 2465 | ;; |
| 2466 | ;; PREFIX is a symbol that will be appended to each exported name. |
| 2467 | ;; The default is to not perform any renaming. |
| 2468 | ;; |
| 2469 | ;; #:renamer RENAMER |
| 2470 | ;; |
| 2471 | ;; RENAMER is a procedure that takes a symbol and returns its new |
| 2472 | ;; name. The default is not perform any renaming. |
| 2473 | ;; |
| 2474 | ;; Signal "no code for module" error if module name is not resolvable |
| 2475 | ;; or its public interface is not available. Signal "no binding" |
| 2476 | ;; error if selected binding does not exist in the used module. |
| 2477 | ;; |
| 2478 | (define (resolve-interface name . args) |
| 2479 | |
| 2480 | (define (get-keyword-arg args kw def) |
| 2481 | (cond ((memq kw args) |
| 2482 | => (lambda (kw-arg) |
| 2483 | (if (null? (cdr kw-arg)) |
| 2484 | (error "keyword without value: " kw)) |
| 2485 | (cadr kw-arg))) |
| 2486 | (else |
| 2487 | def))) |
| 2488 | |
| 2489 | (let* ((select (get-keyword-arg args #:select #f)) |
| 2490 | (hide (get-keyword-arg args #:hide '())) |
| 2491 | (renamer (or (get-keyword-arg args #:renamer #f) |
| 2492 | (let ((prefix (get-keyword-arg args #:prefix #f))) |
| 2493 | (and prefix (symbol-prefix-proc prefix))) |
| 2494 | identity)) |
| 2495 | (version (get-keyword-arg args #:version #f)) |
| 2496 | (module (resolve-module name #t version)) |
| 2497 | (public-i (and module (module-public-interface module)))) |
| 2498 | (and (or (not module) (not public-i)) |
| 2499 | (error "no code for module" name)) |
| 2500 | (if (and (not select) (null? hide) (eq? renamer identity)) |
| 2501 | public-i |
| 2502 | (let ((selection (or select (module-map (lambda (sym var) sym) |
| 2503 | public-i))) |
| 2504 | (custom-i (make-module 31))) |
| 2505 | (set-module-kind! custom-i 'custom-interface) |
| 2506 | (set-module-name! custom-i name) |
| 2507 | ;; XXX - should use a lazy binder so that changes to the |
| 2508 | ;; used module are picked up automatically. |
| 2509 | (for-each (lambda (bspec) |
| 2510 | (let* ((direct? (symbol? bspec)) |
| 2511 | (orig (if direct? bspec (car bspec))) |
| 2512 | (seen (if direct? bspec (cdr bspec))) |
| 2513 | (var (or (module-local-variable public-i orig) |
| 2514 | (module-local-variable module orig) |
| 2515 | (error |
| 2516 | ;; fixme: format manually for now |
| 2517 | (simple-format |
| 2518 | #f "no binding `~A' in module ~A" |
| 2519 | orig name))))) |
| 2520 | (if (memq orig hide) |
| 2521 | (set! hide (delq! orig hide)) |
| 2522 | (module-add! custom-i |
| 2523 | (renamer seen) |
| 2524 | var)))) |
| 2525 | selection) |
| 2526 | ;; Check that we are not hiding bindings which don't exist |
| 2527 | (for-each (lambda (binding) |
| 2528 | (if (not (module-local-variable public-i binding)) |
| 2529 | (error |
| 2530 | (simple-format |
| 2531 | #f "no binding `~A' to hide in module ~A" |
| 2532 | binding name)))) |
| 2533 | hide) |
| 2534 | custom-i)))) |
| 2535 | |
| 2536 | (define (symbol-prefix-proc prefix) |
| 2537 | (lambda (symbol) |
| 2538 | (symbol-append prefix symbol))) |
| 2539 | |
| 2540 | ;; This function is called from "modules.c". If you change it, be |
| 2541 | ;; sure to update "modules.c" as well. |
| 2542 | |
| 2543 | (define (process-define-module args) |
| 2544 | (let* ((module-id (car args)) |
| 2545 | (module (resolve-module module-id #f)) |
| 2546 | (kws (cdr args)) |
| 2547 | (unrecognized (lambda (arg) |
| 2548 | (error "unrecognized define-module argument" arg)))) |
| 2549 | (beautify-user-module! module) |
| 2550 | (let loop ((kws kws) |
| 2551 | (reversed-interfaces '()) |
| 2552 | (exports '()) |
| 2553 | (re-exports '()) |
| 2554 | (replacements '()) |
| 2555 | (autoloads '())) |
| 2556 | |
| 2557 | (if (null? kws) |
| 2558 | (call-with-deferred-observers |
| 2559 | (lambda () |
| 2560 | (module-use-interfaces! module (reverse reversed-interfaces)) |
| 2561 | (module-export! module exports) |
| 2562 | (module-replace! module replacements) |
| 2563 | (module-re-export! module re-exports) |
| 2564 | (if (not (null? autoloads)) |
| 2565 | (apply module-autoload! module autoloads)))) |
| 2566 | (case (car kws) |
| 2567 | ((#:use-module #:use-syntax) |
| 2568 | (or (pair? (cdr kws)) |
| 2569 | (unrecognized kws)) |
| 2570 | (cond |
| 2571 | ((equal? (caadr kws) '(ice-9 syncase)) |
| 2572 | (issue-deprecation-warning |
| 2573 | "(ice-9 syncase) is deprecated. Support for syntax-case is now in Guile core.") |
| 2574 | (loop (cddr kws) |
| 2575 | reversed-interfaces |
| 2576 | exports |
| 2577 | re-exports |
| 2578 | replacements |
| 2579 | autoloads)) |
| 2580 | (else |
| 2581 | (let* ((interface-args (cadr kws)) |
| 2582 | (interface (apply resolve-interface interface-args))) |
| 2583 | (and (eq? (car kws) #:use-syntax) |
| 2584 | (or (symbol? (caar interface-args)) |
| 2585 | (error "invalid module name for use-syntax" |
| 2586 | (car interface-args))) |
| 2587 | (set-module-transformer! |
| 2588 | module |
| 2589 | (module-ref interface |
| 2590 | (car (last-pair (car interface-args))) |
| 2591 | #f))) |
| 2592 | (loop (cddr kws) |
| 2593 | (cons interface reversed-interfaces) |
| 2594 | exports |
| 2595 | re-exports |
| 2596 | replacements |
| 2597 | autoloads))))) |
| 2598 | ((#:autoload) |
| 2599 | (or (and (pair? (cdr kws)) (pair? (cddr kws))) |
| 2600 | (unrecognized kws)) |
| 2601 | (loop (cdddr kws) |
| 2602 | reversed-interfaces |
| 2603 | exports |
| 2604 | re-exports |
| 2605 | replacements |
| 2606 | (let ((name (cadr kws)) |
| 2607 | (bindings (caddr kws))) |
| 2608 | (cons* name bindings autoloads)))) |
| 2609 | ((#:no-backtrace) |
| 2610 | (set-system-module! module #t) |
| 2611 | (loop (cdr kws) reversed-interfaces exports re-exports |
| 2612 | replacements autoloads)) |
| 2613 | ((#:pure) |
| 2614 | (purify-module! module) |
| 2615 | (loop (cdr kws) reversed-interfaces exports re-exports |
| 2616 | replacements autoloads)) |
| 2617 | ((#:version) |
| 2618 | (or (pair? (cdr kws)) |
| 2619 | (unrecognized kws)) |
| 2620 | (let ((version (cadr kws))) |
| 2621 | (set-module-version! module version) |
| 2622 | (set-module-version! (module-public-interface module) version)) |
| 2623 | (loop (cddr kws) reversed-interfaces exports re-exports |
| 2624 | replacements autoloads)) |
| 2625 | ((#:duplicates) |
| 2626 | (if (not (pair? (cdr kws))) |
| 2627 | (unrecognized kws)) |
| 2628 | (set-module-duplicates-handlers! |
| 2629 | module |
| 2630 | (lookup-duplicates-handlers (cadr kws))) |
| 2631 | (loop (cddr kws) reversed-interfaces exports re-exports |
| 2632 | replacements autoloads)) |
| 2633 | ((#:export #:export-syntax) |
| 2634 | (or (pair? (cdr kws)) |
| 2635 | (unrecognized kws)) |
| 2636 | (loop (cddr kws) |
| 2637 | reversed-interfaces |
| 2638 | (append (cadr kws) exports) |
| 2639 | re-exports |
| 2640 | replacements |
| 2641 | autoloads)) |
| 2642 | ((#:re-export #:re-export-syntax) |
| 2643 | (or (pair? (cdr kws)) |
| 2644 | (unrecognized kws)) |
| 2645 | (loop (cddr kws) |
| 2646 | reversed-interfaces |
| 2647 | exports |
| 2648 | (append (cadr kws) re-exports) |
| 2649 | replacements |
| 2650 | autoloads)) |
| 2651 | ((#:replace #:replace-syntax) |
| 2652 | (or (pair? (cdr kws)) |
| 2653 | (unrecognized kws)) |
| 2654 | (loop (cddr kws) |
| 2655 | reversed-interfaces |
| 2656 | exports |
| 2657 | re-exports |
| 2658 | (append (cadr kws) replacements) |
| 2659 | autoloads)) |
| 2660 | (else |
| 2661 | (unrecognized kws))))) |
| 2662 | (run-hook module-defined-hook module) |
| 2663 | module)) |
| 2664 | |
| 2665 | ;; `module-defined-hook' is a hook that is run whenever a new module |
| 2666 | ;; is defined. Its members are called with one argument, the new |
| 2667 | ;; module. |
| 2668 | (define module-defined-hook (make-hook 1)) |
| 2669 | |
| 2670 | \f |
| 2671 | |
| 2672 | ;;; {Autoload} |
| 2673 | ;;; |
| 2674 | |
| 2675 | (define (make-autoload-interface module name bindings) |
| 2676 | (let ((b (lambda (a sym definep) |
| 2677 | (and (memq sym bindings) |
| 2678 | (let ((i (module-public-interface (resolve-module name)))) |
| 2679 | (if (not i) |
| 2680 | (error "missing interface for module" name)) |
| 2681 | (let ((autoload (memq a (module-uses module)))) |
| 2682 | ;; Replace autoload-interface with actual interface if |
| 2683 | ;; that has not happened yet. |
| 2684 | (if (pair? autoload) |
| 2685 | (set-car! autoload i))) |
| 2686 | (module-local-variable i sym)))))) |
| 2687 | (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f |
| 2688 | (make-hash-table 0) '() (make-weak-value-hash-table 31) #f |
| 2689 | (make-hash-table 0) #f #f))) |
| 2690 | |
| 2691 | (define (module-autoload! module . args) |
| 2692 | "Have @var{module} automatically load the module named @var{name} when one |
| 2693 | of the symbols listed in @var{bindings} is looked up. @var{args} should be a |
| 2694 | list of module-name/binding-list pairs, e.g., as in @code{(module-autoload! |
| 2695 | module '(ice-9 q) '(make-q q-length))}." |
| 2696 | (let loop ((args args)) |
| 2697 | (cond ((null? args) |
| 2698 | #t) |
| 2699 | ((null? (cdr args)) |
| 2700 | (error "invalid name+binding autoload list" args)) |
| 2701 | (else |
| 2702 | (let ((name (car args)) |
| 2703 | (bindings (cadr args))) |
| 2704 | (module-use! module (make-autoload-interface module |
| 2705 | name bindings)) |
| 2706 | (loop (cddr args))))))) |
| 2707 | |
| 2708 | |
| 2709 | \f |
| 2710 | |
| 2711 | ;;; {Autoloading modules} |
| 2712 | ;;; |
| 2713 | |
| 2714 | (define autoloads-in-progress '()) |
| 2715 | |
| 2716 | ;; This function is called from "modules.c". If you change it, be |
| 2717 | ;; sure to update "modules.c" as well. |
| 2718 | |
| 2719 | (define (try-module-autoload module-name . args) |
| 2720 | (let* ((reverse-name (reverse module-name)) |
| 2721 | (name (symbol->string (car reverse-name))) |
| 2722 | (version (and (not (null? args)) (car args))) |
| 2723 | (dir-hint-module-name (reverse (cdr reverse-name))) |
| 2724 | (dir-hint (apply string-append |
| 2725 | (map (lambda (elt) |
| 2726 | (string-append (symbol->string elt) "/")) |
| 2727 | dir-hint-module-name)))) |
| 2728 | (resolve-module dir-hint-module-name #f) |
| 2729 | (and (not (autoload-done-or-in-progress? dir-hint name)) |
| 2730 | (let ((didit #f)) |
| 2731 | (dynamic-wind |
| 2732 | (lambda () (autoload-in-progress! dir-hint name)) |
| 2733 | (lambda () |
| 2734 | (with-fluids ((current-reader #f)) |
| 2735 | (save-module-excursion |
| 2736 | (lambda () |
| 2737 | (if version |
| 2738 | (load (find-versioned-module |
| 2739 | dir-hint name version %load-path)) |
| 2740 | (primitive-load-path (in-vicinity dir-hint name) #f)) |
| 2741 | (set! didit #t))))) |
| 2742 | (lambda () (set-autoloaded! dir-hint name didit))) |
| 2743 | didit)))) |
| 2744 | |
| 2745 | \f |
| 2746 | |
| 2747 | ;;; {Dynamic linking of modules} |
| 2748 | ;;; |
| 2749 | |
| 2750 | (define autoloads-done '((guile . guile))) |
| 2751 | |
| 2752 | (define (autoload-done-or-in-progress? p m) |
| 2753 | (let ((n (cons p m))) |
| 2754 | (->bool (or (member n autoloads-done) |
| 2755 | (member n autoloads-in-progress))))) |
| 2756 | |
| 2757 | (define (autoload-done! p m) |
| 2758 | (let ((n (cons p m))) |
| 2759 | (set! autoloads-in-progress |
| 2760 | (delete! n autoloads-in-progress)) |
| 2761 | (or (member n autoloads-done) |
| 2762 | (set! autoloads-done (cons n autoloads-done))))) |
| 2763 | |
| 2764 | (define (autoload-in-progress! p m) |
| 2765 | (let ((n (cons p m))) |
| 2766 | (set! autoloads-done |
| 2767 | (delete! n autoloads-done)) |
| 2768 | (set! autoloads-in-progress (cons n autoloads-in-progress)))) |
| 2769 | |
| 2770 | (define (set-autoloaded! p m done?) |
| 2771 | (if done? |
| 2772 | (autoload-done! p m) |
| 2773 | (let ((n (cons p m))) |
| 2774 | (set! autoloads-done (delete! n autoloads-done)) |
| 2775 | (set! autoloads-in-progress (delete! n autoloads-in-progress))))) |
| 2776 | |
| 2777 | \f |
| 2778 | |
| 2779 | ;;; {Run-time options} |
| 2780 | ;;; |
| 2781 | |
| 2782 | (defmacro define-option-interface (option-group) |
| 2783 | (let* ((option-name 'car) |
| 2784 | (option-value 'cadr) |
| 2785 | (option-documentation 'caddr) |
| 2786 | |
| 2787 | ;; Below follow the macros defining the run-time option interfaces. |
| 2788 | |
| 2789 | (make-options (lambda (interface) |
| 2790 | `(lambda args |
| 2791 | (cond ((null? args) (,interface)) |
| 2792 | ((list? (car args)) |
| 2793 | (,interface (car args)) (,interface)) |
| 2794 | (else (for-each |
| 2795 | (lambda (option) |
| 2796 | (display (,option-name option)) |
| 2797 | (if (< (string-length |
| 2798 | (symbol->string (,option-name option))) |
| 2799 | 8) |
| 2800 | (display #\tab)) |
| 2801 | (display #\tab) |
| 2802 | (display (,option-value option)) |
| 2803 | (display #\tab) |
| 2804 | (display (,option-documentation option)) |
| 2805 | (newline)) |
| 2806 | (,interface #t))))))) |
| 2807 | |
| 2808 | (make-enable (lambda (interface) |
| 2809 | `(lambda flags |
| 2810 | (,interface (append flags (,interface))) |
| 2811 | (,interface)))) |
| 2812 | |
| 2813 | (make-disable (lambda (interface) |
| 2814 | `(lambda flags |
| 2815 | (let ((options (,interface))) |
| 2816 | (for-each (lambda (flag) |
| 2817 | (set! options (delq! flag options))) |
| 2818 | flags) |
| 2819 | (,interface options) |
| 2820 | (,interface)))))) |
| 2821 | (let* ((interface (car option-group)) |
| 2822 | (options/enable/disable (cadr option-group))) |
| 2823 | `(begin |
| 2824 | (define ,(car options/enable/disable) |
| 2825 | ,(make-options interface)) |
| 2826 | (define ,(cadr options/enable/disable) |
| 2827 | ,(make-enable interface)) |
| 2828 | (define ,(caddr options/enable/disable) |
| 2829 | ,(make-disable interface)) |
| 2830 | (defmacro ,(caaddr option-group) (opt val) |
| 2831 | `(,',(car options/enable/disable) |
| 2832 | (append (,',(car options/enable/disable)) |
| 2833 | (list ',opt ,val)))))))) |
| 2834 | |
| 2835 | (define-option-interface |
| 2836 | (eval-options-interface |
| 2837 | (eval-options eval-enable eval-disable) |
| 2838 | (eval-set!))) |
| 2839 | |
| 2840 | (define-option-interface |
| 2841 | (debug-options-interface |
| 2842 | (debug-options debug-enable debug-disable) |
| 2843 | (debug-set!))) |
| 2844 | |
| 2845 | (define-option-interface |
| 2846 | (evaluator-traps-interface |
| 2847 | (traps trap-enable trap-disable) |
| 2848 | (trap-set!))) |
| 2849 | |
| 2850 | (define-option-interface |
| 2851 | (read-options-interface |
| 2852 | (read-options read-enable read-disable) |
| 2853 | (read-set!))) |
| 2854 | |
| 2855 | (define-option-interface |
| 2856 | (print-options-interface |
| 2857 | (print-options print-enable print-disable) |
| 2858 | (print-set!))) |
| 2859 | |
| 2860 | \f |
| 2861 | |
| 2862 | ;;; {Running Repls} |
| 2863 | ;;; |
| 2864 | |
| 2865 | (define (repl read evaler print) |
| 2866 | (let loop ((source (read (current-input-port)))) |
| 2867 | (print (evaler source)) |
| 2868 | (loop (read (current-input-port))))) |
| 2869 | |
| 2870 | ;; A provisional repl that acts like the SCM repl: |
| 2871 | ;; |
| 2872 | (define scm-repl-silent #f) |
| 2873 | (define (assert-repl-silence v) (set! scm-repl-silent v)) |
| 2874 | |
| 2875 | (define *unspecified* (if #f #f)) |
| 2876 | (define (unspecified? v) (eq? v *unspecified*)) |
| 2877 | |
| 2878 | (define scm-repl-print-unspecified #f) |
| 2879 | (define (assert-repl-print-unspecified v) (set! scm-repl-print-unspecified v)) |
| 2880 | |
| 2881 | (define scm-repl-verbose #f) |
| 2882 | (define (assert-repl-verbosity v) (set! scm-repl-verbose v)) |
| 2883 | |
| 2884 | (define scm-repl-prompt "guile> ") |
| 2885 | |
| 2886 | (define (set-repl-prompt! v) (set! scm-repl-prompt v)) |
| 2887 | |
| 2888 | (define (default-pre-unwind-handler key . args) |
| 2889 | ;; Narrow by two more frames: this one, and the throw handler. |
| 2890 | (save-stack 2) |
| 2891 | (apply throw key args)) |
| 2892 | |
| 2893 | (begin-deprecated |
| 2894 | (define (pre-unwind-handler-dispatch key . args) |
| 2895 | (apply default-pre-unwind-handler key args))) |
| 2896 | |
| 2897 | (define abort-hook (make-hook)) |
| 2898 | |
| 2899 | ;; these definitions are used if running a script. |
| 2900 | ;; otherwise redefined in error-catching-loop. |
| 2901 | (define (set-batch-mode?! arg) #t) |
| 2902 | (define (batch-mode?) #t) |
| 2903 | |
| 2904 | (define (error-catching-loop thunk) |
| 2905 | (let ((status #f) |
| 2906 | (interactive #t)) |
| 2907 | (define (loop first) |
| 2908 | (let ((next |
| 2909 | (catch #t |
| 2910 | |
| 2911 | (lambda () |
| 2912 | (call-with-unblocked-asyncs |
| 2913 | (lambda () |
| 2914 | (with-traps |
| 2915 | (lambda () |
| 2916 | (first) |
| 2917 | |
| 2918 | ;; This line is needed because mark |
| 2919 | ;; doesn't do closures quite right. |
| 2920 | ;; Unreferenced locals should be |
| 2921 | ;; collected. |
| 2922 | (set! first #f) |
| 2923 | (let loop ((v (thunk))) |
| 2924 | (loop (thunk))) |
| 2925 | #f))))) |
| 2926 | |
| 2927 | (lambda (key . args) |
| 2928 | (case key |
| 2929 | ((quit) |
| 2930 | (set! status args) |
| 2931 | #f) |
| 2932 | |
| 2933 | ((switch-repl) |
| 2934 | (apply throw 'switch-repl args)) |
| 2935 | |
| 2936 | ((abort) |
| 2937 | ;; This is one of the closures that require |
| 2938 | ;; (set! first #f) above |
| 2939 | ;; |
| 2940 | (lambda () |
| 2941 | (run-hook abort-hook) |
| 2942 | (force-output (current-output-port)) |
| 2943 | (display "ABORT: " (current-error-port)) |
| 2944 | (write args (current-error-port)) |
| 2945 | (newline (current-error-port)) |
| 2946 | (if interactive |
| 2947 | (begin |
| 2948 | (if (and |
| 2949 | (not has-shown-debugger-hint?) |
| 2950 | (not (memq 'backtrace |
| 2951 | (debug-options-interface))) |
| 2952 | (stack? (fluid-ref the-last-stack))) |
| 2953 | (begin |
| 2954 | (newline (current-error-port)) |
| 2955 | (display |
| 2956 | "Type \"(backtrace)\" to get more information or \"(debug)\" to enter the debugger.\n" |
| 2957 | (current-error-port)) |
| 2958 | (set! has-shown-debugger-hint? #t))) |
| 2959 | (force-output (current-error-port))) |
| 2960 | (begin |
| 2961 | (primitive-exit 1))) |
| 2962 | (set! stack-saved? #f))) |
| 2963 | |
| 2964 | (else |
| 2965 | ;; This is the other cons-leak closure... |
| 2966 | (lambda () |
| 2967 | (cond ((= (length args) 4) |
| 2968 | (apply handle-system-error key args)) |
| 2969 | (else |
| 2970 | (apply bad-throw key args))))))) |
| 2971 | |
| 2972 | default-pre-unwind-handler))) |
| 2973 | |
| 2974 | (if next (loop next) status))) |
| 2975 | (set! set-batch-mode?! (lambda (arg) |
| 2976 | (cond (arg |
| 2977 | (set! interactive #f) |
| 2978 | (restore-signals)) |
| 2979 | (#t |
| 2980 | (error "sorry, not implemented"))))) |
| 2981 | (set! batch-mode? (lambda () (not interactive))) |
| 2982 | (call-with-blocked-asyncs |
| 2983 | (lambda () (loop (lambda () #t)))))) |
| 2984 | |
| 2985 | ;;(define the-last-stack (make-fluid)) Defined by scm_init_backtrace () |
| 2986 | (define before-signal-stack (make-fluid)) |
| 2987 | ;; FIXME: stack-saved? is broken in the presence of threads. |
| 2988 | (define stack-saved? #f) |
| 2989 | |
| 2990 | (define (save-stack . narrowing) |
| 2991 | (if (not stack-saved?) |
| 2992 | (begin |
| 2993 | (let ((stacks (fluid-ref %stacks))) |
| 2994 | (fluid-set! the-last-stack |
| 2995 | ;; (make-stack obj inner outer inner outer ...) |
| 2996 | ;; |
| 2997 | ;; In this case, cut away the make-stack frame, the |
| 2998 | ;; save-stack frame, and then narrow as specified by the |
| 2999 | ;; user, delimited by the nearest start-stack invocation, |
| 3000 | ;; if any. |
| 3001 | (apply make-stack #t |
| 3002 | 2 |
| 3003 | (if (pair? stacks) (cdar stacks) 0) |
| 3004 | narrowing))) |
| 3005 | (set! stack-saved? #t)))) |
| 3006 | |
| 3007 | (define before-error-hook (make-hook)) |
| 3008 | (define after-error-hook (make-hook)) |
| 3009 | (define before-backtrace-hook (make-hook)) |
| 3010 | (define after-backtrace-hook (make-hook)) |
| 3011 | |
| 3012 | (define has-shown-debugger-hint? #f) |
| 3013 | |
| 3014 | (define (handle-system-error key . args) |
| 3015 | (let ((cep (current-error-port))) |
| 3016 | (cond ((not (stack? (fluid-ref the-last-stack)))) |
| 3017 | ((memq 'backtrace (debug-options-interface)) |
| 3018 | (let ((highlights (if (or (eq? key 'wrong-type-arg) |
| 3019 | (eq? key 'out-of-range)) |
| 3020 | (list-ref args 3) |
| 3021 | '()))) |
| 3022 | (run-hook before-backtrace-hook) |
| 3023 | (newline cep) |
| 3024 | (display "Backtrace:\n") |
| 3025 | (display-backtrace (fluid-ref the-last-stack) cep |
| 3026 | #f #f highlights) |
| 3027 | (newline cep) |
| 3028 | (run-hook after-backtrace-hook)))) |
| 3029 | (run-hook before-error-hook) |
| 3030 | (apply display-error (fluid-ref the-last-stack) cep args) |
| 3031 | (run-hook after-error-hook) |
| 3032 | (force-output cep) |
| 3033 | (throw 'abort key))) |
| 3034 | |
| 3035 | (define (quit . args) |
| 3036 | (apply throw 'quit args)) |
| 3037 | |
| 3038 | (define exit quit) |
| 3039 | |
| 3040 | ;;(define has-shown-backtrace-hint? #f) Defined by scm_init_backtrace () |
| 3041 | |
| 3042 | ;; Replaced by C code: |
| 3043 | ;;(define (backtrace) |
| 3044 | ;; (if (fluid-ref the-last-stack) |
| 3045 | ;; (begin |
| 3046 | ;; (newline) |
| 3047 | ;; (display-backtrace (fluid-ref the-last-stack) (current-output-port)) |
| 3048 | ;; (newline) |
| 3049 | ;; (if (and (not has-shown-backtrace-hint?) |
| 3050 | ;; (not (memq 'backtrace (debug-options-interface)))) |
| 3051 | ;; (begin |
| 3052 | ;; (display |
| 3053 | ;;"Type \"(debug-enable 'backtrace)\" if you would like a backtrace |
| 3054 | ;;automatically if an error occurs in the future.\n") |
| 3055 | ;; (set! has-shown-backtrace-hint? #t)))) |
| 3056 | ;; (display "No backtrace available.\n"))) |
| 3057 | |
| 3058 | (define (error-catching-repl r e p) |
| 3059 | (error-catching-loop |
| 3060 | (lambda () |
| 3061 | (call-with-values (lambda () (e (r))) |
| 3062 | (lambda the-values (for-each p the-values)))))) |
| 3063 | |
| 3064 | (define (gc-run-time) |
| 3065 | (cdr (assq 'gc-time-taken (gc-stats)))) |
| 3066 | |
| 3067 | (define before-read-hook (make-hook)) |
| 3068 | (define after-read-hook (make-hook)) |
| 3069 | (define before-eval-hook (make-hook 1)) |
| 3070 | (define after-eval-hook (make-hook 1)) |
| 3071 | (define before-print-hook (make-hook 1)) |
| 3072 | (define after-print-hook (make-hook 1)) |
| 3073 | |
| 3074 | ;;; The default repl-reader function. We may override this if we've |
| 3075 | ;;; the readline library. |
| 3076 | (define repl-reader |
| 3077 | (lambda (prompt . reader) |
| 3078 | (if (not (char-ready?)) |
| 3079 | (display (if (string? prompt) prompt (prompt)))) |
| 3080 | (force-output) |
| 3081 | (run-hook before-read-hook) |
| 3082 | ((or (and (pair? reader) (car reader)) |
| 3083 | (fluid-ref current-reader) |
| 3084 | read) |
| 3085 | (current-input-port)))) |
| 3086 | |
| 3087 | (define (scm-style-repl) |
| 3088 | |
| 3089 | (letrec ( |
| 3090 | (start-gc-rt #f) |
| 3091 | (start-rt #f) |
| 3092 | (repl-report-start-timing (lambda () |
| 3093 | (set! start-gc-rt (gc-run-time)) |
| 3094 | (set! start-rt (get-internal-run-time)))) |
| 3095 | (repl-report (lambda () |
| 3096 | (display ";;; ") |
| 3097 | (display (inexact->exact |
| 3098 | (* 1000 (/ (- (get-internal-run-time) start-rt) |
| 3099 | internal-time-units-per-second)))) |
| 3100 | (display " msec (") |
| 3101 | (display (inexact->exact |
| 3102 | (* 1000 (/ (- (gc-run-time) start-gc-rt) |
| 3103 | internal-time-units-per-second)))) |
| 3104 | (display " msec in gc)\n"))) |
| 3105 | |
| 3106 | (consume-trailing-whitespace |
| 3107 | (lambda () |
| 3108 | (let ((ch (peek-char))) |
| 3109 | (cond |
| 3110 | ((eof-object? ch)) |
| 3111 | ((or (char=? ch #\space) (char=? ch #\tab)) |
| 3112 | (read-char) |
| 3113 | (consume-trailing-whitespace)) |
| 3114 | ((char=? ch #\newline) |
| 3115 | (read-char)))))) |
| 3116 | (-read (lambda () |
| 3117 | (let ((val |
| 3118 | (let ((prompt (cond ((string? scm-repl-prompt) |
| 3119 | scm-repl-prompt) |
| 3120 | ((thunk? scm-repl-prompt) |
| 3121 | (scm-repl-prompt)) |
| 3122 | (scm-repl-prompt "> ") |
| 3123 | (else "")))) |
| 3124 | (repl-reader prompt)))) |
| 3125 | |
| 3126 | ;; As described in R4RS, the READ procedure updates the |
| 3127 | ;; port to point to the first character past the end of |
| 3128 | ;; the external representation of the object. This |
| 3129 | ;; means that it doesn't consume the newline typically |
| 3130 | ;; found after an expression. This means that, when |
| 3131 | ;; debugging Guile with GDB, GDB gets the newline, which |
| 3132 | ;; it often interprets as a "continue" command, making |
| 3133 | ;; breakpoints kind of useless. So, consume any |
| 3134 | ;; trailing newline here, as well as any whitespace |
| 3135 | ;; before it. |
| 3136 | ;; But not if EOF, for control-D. |
| 3137 | (if (not (eof-object? val)) |
| 3138 | (consume-trailing-whitespace)) |
| 3139 | (run-hook after-read-hook) |
| 3140 | (if (eof-object? val) |
| 3141 | (begin |
| 3142 | (repl-report-start-timing) |
| 3143 | (if scm-repl-verbose |
| 3144 | (begin |
| 3145 | (newline) |
| 3146 | (display ";;; EOF -- quitting") |
| 3147 | (newline))) |
| 3148 | (quit 0))) |
| 3149 | val))) |
| 3150 | |
| 3151 | (-eval (lambda (sourc) |
| 3152 | (repl-report-start-timing) |
| 3153 | (run-hook before-eval-hook sourc) |
| 3154 | (let ((val (start-stack 'repl-stack |
| 3155 | ;; If you change this procedure |
| 3156 | ;; (primitive-eval), please also |
| 3157 | ;; modify the repl-stack case in |
| 3158 | ;; save-stack so that stack cutting |
| 3159 | ;; continues to work. |
| 3160 | (primitive-eval sourc)))) |
| 3161 | (run-hook after-eval-hook sourc) |
| 3162 | val))) |
| 3163 | |
| 3164 | |
| 3165 | (-print (let ((maybe-print (lambda (result) |
| 3166 | (if (or scm-repl-print-unspecified |
| 3167 | (not (unspecified? result))) |
| 3168 | (begin |
| 3169 | (write result) |
| 3170 | (newline)))))) |
| 3171 | (lambda (result) |
| 3172 | (if (not scm-repl-silent) |
| 3173 | (begin |
| 3174 | (run-hook before-print-hook result) |
| 3175 | (maybe-print result) |
| 3176 | (run-hook after-print-hook result) |
| 3177 | (if scm-repl-verbose |
| 3178 | (repl-report)) |
| 3179 | (force-output)))))) |
| 3180 | |
| 3181 | (-quit (lambda (args) |
| 3182 | (if scm-repl-verbose |
| 3183 | (begin |
| 3184 | (display ";;; QUIT executed, repl exitting") |
| 3185 | (newline) |
| 3186 | (repl-report))) |
| 3187 | args))) |
| 3188 | |
| 3189 | (let ((status (error-catching-repl -read |
| 3190 | -eval |
| 3191 | -print))) |
| 3192 | (-quit status)))) |
| 3193 | |
| 3194 | |
| 3195 | \f |
| 3196 | |
| 3197 | ;;; {IOTA functions: generating lists of numbers} |
| 3198 | ;;; |
| 3199 | |
| 3200 | (define (iota n) |
| 3201 | (let loop ((count (1- n)) (result '())) |
| 3202 | (if (< count 0) result |
| 3203 | (loop (1- count) (cons count result))))) |
| 3204 | |
| 3205 | \f |
| 3206 | |
| 3207 | ;;; {collect} |
| 3208 | ;;; |
| 3209 | ;;; Similar to `begin' but returns a list of the results of all constituent |
| 3210 | ;;; forms instead of the result of the last form. |
| 3211 | ;;; (The definition relies on the current left-to-right |
| 3212 | ;;; order of evaluation of operands in applications.) |
| 3213 | ;;; |
| 3214 | |
| 3215 | (defmacro collect forms |
| 3216 | (cons 'list forms)) |
| 3217 | |
| 3218 | \f |
| 3219 | |
| 3220 | ;;; {While} |
| 3221 | ;;; |
| 3222 | ;;; with `continue' and `break'. |
| 3223 | ;;; |
| 3224 | |
| 3225 | ;; The inner `do' loop avoids re-establishing a catch every iteration, |
| 3226 | ;; that's only necessary if continue is actually used. A new key is |
| 3227 | ;; generated every time, so break and continue apply to their originating |
| 3228 | ;; `while' even when recursing. |
| 3229 | ;; |
| 3230 | ;; FIXME: This macro is unintentionally unhygienic with respect to let, |
| 3231 | ;; make-symbol, do, throw, catch, lambda, and not. |
| 3232 | ;; |
| 3233 | (define-macro (while cond . body) |
| 3234 | (let ((keyvar (make-symbol "while-keyvar"))) |
| 3235 | `(let ((,keyvar (make-symbol "while-key"))) |
| 3236 | (do () |
| 3237 | ((catch ,keyvar |
| 3238 | (lambda () |
| 3239 | (let ((break (lambda () (throw ,keyvar #t))) |
| 3240 | (continue (lambda () (throw ,keyvar #f)))) |
| 3241 | (do () |
| 3242 | ((not ,cond)) |
| 3243 | ,@body) |
| 3244 | #t)) |
| 3245 | (lambda (key arg) |
| 3246 | arg))))))) |
| 3247 | |
| 3248 | |
| 3249 | \f |
| 3250 | |
| 3251 | ;;; {Module System Macros} |
| 3252 | ;;; |
| 3253 | |
| 3254 | ;; Return a list of expressions that evaluate to the appropriate |
| 3255 | ;; arguments for resolve-interface according to SPEC. |
| 3256 | |
| 3257 | (eval-when |
| 3258 | (compile) |
| 3259 | (if (memq 'prefix (read-options)) |
| 3260 | (error "boot-9 must be compiled with #:kw, not :kw"))) |
| 3261 | |
| 3262 | (define (keyword-like-symbol->keyword sym) |
| 3263 | (symbol->keyword (string->symbol (substring (symbol->string sym) 1)))) |
| 3264 | |
| 3265 | ;; FIXME: we really need to clean up the guts of the module system. |
| 3266 | ;; We can compile to something better than process-define-module. |
| 3267 | (define-syntax define-module |
| 3268 | (lambda (x) |
| 3269 | (define (keyword-like? stx) |
| 3270 | (let ((dat (syntax->datum stx))) |
| 3271 | (and (symbol? dat) |
| 3272 | (eqv? (string-ref (symbol->string dat) 0) #\:)))) |
| 3273 | (define (->keyword sym) |
| 3274 | (symbol->keyword (string->symbol (substring (symbol->string sym) 1)))) |
| 3275 | |
| 3276 | (define (quotify-iface args) |
| 3277 | (let loop ((in args) (out '())) |
| 3278 | (syntax-case in () |
| 3279 | (() (reverse! out)) |
| 3280 | ;; The user wanted #:foo, but wrote :foo. Fix it. |
| 3281 | ((sym . in) (keyword-like? #'sym) |
| 3282 | (loop #`(#,(->keyword (syntax->datum #'sym)) . in) out)) |
| 3283 | ((kw . in) (not (keyword? (syntax->datum #'kw))) |
| 3284 | (syntax-violation 'define-module "expected keyword arg" x #'kw)) |
| 3285 | ((#:renamer renamer . in) |
| 3286 | (loop #'in (cons* #'renamer #:renamer out))) |
| 3287 | ((kw val . in) |
| 3288 | (loop #'in (cons* #''val #'kw out)))))) |
| 3289 | |
| 3290 | (define (quotify args) |
| 3291 | ;; Just quote everything except #:use-module and #:use-syntax. We |
| 3292 | ;; need to know about all arguments regardless since we want to turn |
| 3293 | ;; symbols that look like keywords into real keywords, and the |
| 3294 | ;; keyword args in a define-module form are not regular |
| 3295 | ;; (i.e. no-backtrace doesn't take a value). |
| 3296 | (let loop ((in args) (out '())) |
| 3297 | (syntax-case in () |
| 3298 | (() (reverse! out)) |
| 3299 | ;; The user wanted #:foo, but wrote :foo. Fix it. |
| 3300 | ((sym . in) (keyword-like? #'sym) |
| 3301 | (loop #`(#,(->keyword (syntax->datum #'sym)) . in) out)) |
| 3302 | ((kw . in) (not (keyword? (syntax->datum #'kw))) |
| 3303 | (syntax-violation 'define-module "expected keyword arg" x #'kw)) |
| 3304 | ((#:no-backtrace . in) |
| 3305 | (loop #'in (cons #:no-backtrace out))) |
| 3306 | ((#:pure . in) |
| 3307 | (loop #'in (cons #:pure out))) |
| 3308 | ((kw) |
| 3309 | (syntax-violation 'define-module "keyword arg without value" x #'kw)) |
| 3310 | ((use-module (name name* ...) . in) |
| 3311 | (and (memq (syntax->datum #'use-module) '(#:use-module #:use-syntax)) |
| 3312 | (and-map symbol? (syntax->datum #'(name name* ...)))) |
| 3313 | (loop #'in |
| 3314 | (cons* #''((name name* ...)) |
| 3315 | #'use-module |
| 3316 | out))) |
| 3317 | ((use-module ((name name* ...) arg ...) . in) |
| 3318 | (and (memq (syntax->datum #'use-module) '(#:use-module #:use-syntax)) |
| 3319 | (and-map symbol? (syntax->datum #'(name name* ...)))) |
| 3320 | (loop #'in |
| 3321 | (cons* #`(list '(name name* ...) #,@(quotify-iface #'(arg ...))) |
| 3322 | #'use-module |
| 3323 | out))) |
| 3324 | ((#:autoload name bindings . in) |
| 3325 | (loop #'in (cons* #''bindings #''name #:autoload out))) |
| 3326 | ((kw val . in) |
| 3327 | (loop #'in (cons* #''val #'kw out)))))) |
| 3328 | |
| 3329 | (syntax-case x () |
| 3330 | ((_ (name name* ...) arg ...) |
| 3331 | (with-syntax (((quoted-arg ...) (quotify #'(arg ...)))) |
| 3332 | #'(eval-when (eval load compile expand) |
| 3333 | (let ((m (process-define-module |
| 3334 | (list '(name name* ...) quoted-arg ...)))) |
| 3335 | (set-current-module m) |
| 3336 | m))))))) |
| 3337 | |
| 3338 | ;; The guts of the use-modules macro. Add the interfaces of the named |
| 3339 | ;; modules to the use-list of the current module, in order. |
| 3340 | |
| 3341 | ;; This function is called by "modules.c". If you change it, be sure |
| 3342 | ;; to change scm_c_use_module as well. |
| 3343 | |
| 3344 | (define (process-use-modules module-interface-args) |
| 3345 | (let ((interfaces (map (lambda (mif-args) |
| 3346 | (or (apply resolve-interface mif-args) |
| 3347 | (error "no such module" mif-args))) |
| 3348 | module-interface-args))) |
| 3349 | (call-with-deferred-observers |
| 3350 | (lambda () |
| 3351 | (module-use-interfaces! (current-module) interfaces))))) |
| 3352 | |
| 3353 | (define-syntax use-modules |
| 3354 | (lambda (x) |
| 3355 | (define (keyword-like? stx) |
| 3356 | (let ((dat (syntax->datum stx))) |
| 3357 | (and (symbol? dat) |
| 3358 | (eqv? (string-ref (symbol->string dat) 0) #\:)))) |
| 3359 | (define (->keyword sym) |
| 3360 | (symbol->keyword (string->symbol (substring (symbol->string sym) 1)))) |
| 3361 | |
| 3362 | (define (quotify-iface args) |
| 3363 | (let loop ((in args) (out '())) |
| 3364 | (syntax-case in () |
| 3365 | (() (reverse! out)) |
| 3366 | ;; The user wanted #:foo, but wrote :foo. Fix it. |
| 3367 | ((sym . in) (keyword-like? #'sym) |
| 3368 | (loop #`(#,(->keyword (syntax->datum #'sym)) . in) out)) |
| 3369 | ((kw . in) (not (keyword? (syntax->datum #'kw))) |
| 3370 | (syntax-violation 'define-module "expected keyword arg" x #'kw)) |
| 3371 | ((#:renamer renamer . in) |
| 3372 | (loop #'in (cons* #'renamer #:renamer out))) |
| 3373 | ((kw val . in) |
| 3374 | (loop #'in (cons* #''val #'kw out)))))) |
| 3375 | |
| 3376 | (define (quotify specs) |
| 3377 | (let lp ((in specs) (out '())) |
| 3378 | (syntax-case in () |
| 3379 | (() (reverse out)) |
| 3380 | (((name name* ...) . in) |
| 3381 | (and-map symbol? (syntax->datum #'(name name* ...))) |
| 3382 | (lp #'in (cons #''((name name* ...)) out))) |
| 3383 | ((((name name* ...) arg ...) . in) |
| 3384 | (and-map symbol? (syntax->datum #'(name name* ...))) |
| 3385 | (with-syntax (((quoted-arg ...) (quotify-iface #'(arg ...)))) |
| 3386 | (lp #'in (cons #`(list '(name name* ...) quoted-arg ...) |
| 3387 | out))))))) |
| 3388 | |
| 3389 | (syntax-case x () |
| 3390 | ((_ spec ...) |
| 3391 | (with-syntax (((quoted-args ...) (quotify #'(spec ...)))) |
| 3392 | #'(eval-when (eval load compile expand) |
| 3393 | (process-use-modules (list quoted-args ...)) |
| 3394 | *unspecified*)))))) |
| 3395 | |
| 3396 | (define-syntax use-syntax |
| 3397 | (syntax-rules () |
| 3398 | ((_ spec ...) |
| 3399 | (begin |
| 3400 | (eval-when (eval load compile expand) |
| 3401 | (issue-deprecation-warning |
| 3402 | "`use-syntax' is deprecated. Please contact guile-devel for more info.")) |
| 3403 | (use-modules spec ...))))) |
| 3404 | |
| 3405 | (include-from-path "ice-9/r6rs-libraries") |
| 3406 | |
| 3407 | (define-syntax define-private |
| 3408 | (syntax-rules () |
| 3409 | ((_ foo bar) |
| 3410 | (define foo bar)))) |
| 3411 | |
| 3412 | (define-syntax define-public |
| 3413 | (syntax-rules () |
| 3414 | ((_ (name . args) . body) |
| 3415 | (define-public name (lambda args . body))) |
| 3416 | ((_ name val) |
| 3417 | (begin |
| 3418 | (define name val) |
| 3419 | (export name))))) |
| 3420 | |
| 3421 | (define-syntax defmacro-public |
| 3422 | (syntax-rules () |
| 3423 | ((_ name args . body) |
| 3424 | (begin |
| 3425 | (defmacro name args . body) |
| 3426 | (export-syntax name))))) |
| 3427 | |
| 3428 | ;; And now for the most important macro. |
| 3429 | (define-syntax λ |
| 3430 | (syntax-rules () |
| 3431 | ((_ formals body ...) |
| 3432 | (lambda formals body ...)))) |
| 3433 | |
| 3434 | \f |
| 3435 | ;; Export a local variable |
| 3436 | |
| 3437 | ;; This function is called from "modules.c". If you change it, be |
| 3438 | ;; sure to update "modules.c" as well. |
| 3439 | |
| 3440 | (define (module-export! m names) |
| 3441 | (let ((public-i (module-public-interface m))) |
| 3442 | (for-each (lambda (name) |
| 3443 | (let* ((internal-name (if (pair? name) (car name) name)) |
| 3444 | (external-name (if (pair? name) (cdr name) name)) |
| 3445 | (var (module-ensure-local-variable! m internal-name))) |
| 3446 | (module-add! public-i external-name var))) |
| 3447 | names))) |
| 3448 | |
| 3449 | (define (module-replace! m names) |
| 3450 | (let ((public-i (module-public-interface m))) |
| 3451 | (for-each (lambda (name) |
| 3452 | (let* ((internal-name (if (pair? name) (car name) name)) |
| 3453 | (external-name (if (pair? name) (cdr name) name)) |
| 3454 | (var (module-ensure-local-variable! m internal-name))) |
| 3455 | (set-object-property! var 'replace #t) |
| 3456 | (module-add! public-i external-name var))) |
| 3457 | names))) |
| 3458 | |
| 3459 | ;; Export all local variables from a module |
| 3460 | ;; |
| 3461 | (define (module-export-all! mod) |
| 3462 | (define (fresh-interface!) |
| 3463 | (let ((iface (make-module))) |
| 3464 | (set-module-name! iface (module-name mod)) |
| 3465 | ;; for guile 2: (set-module-version! iface (module-version mod)) |
| 3466 | (set-module-kind! iface 'interface) |
| 3467 | (set-module-public-interface! mod iface) |
| 3468 | iface)) |
| 3469 | (let ((iface (or (module-public-interface mod) |
| 3470 | (fresh-interface!)))) |
| 3471 | (set-module-obarray! iface (module-obarray mod)))) |
| 3472 | |
| 3473 | ;; Re-export a imported variable |
| 3474 | ;; |
| 3475 | (define (module-re-export! m names) |
| 3476 | (let ((public-i (module-public-interface m))) |
| 3477 | (for-each (lambda (name) |
| 3478 | (let* ((internal-name (if (pair? name) (car name) name)) |
| 3479 | (external-name (if (pair? name) (cdr name) name)) |
| 3480 | (var (module-variable m internal-name))) |
| 3481 | (cond ((not var) |
| 3482 | (error "Undefined variable:" internal-name)) |
| 3483 | ((eq? var (module-local-variable m internal-name)) |
| 3484 | (error "re-exporting local variable:" internal-name)) |
| 3485 | (else |
| 3486 | (module-add! public-i external-name var))))) |
| 3487 | names))) |
| 3488 | |
| 3489 | (define-syntax export |
| 3490 | (syntax-rules () |
| 3491 | ((_ name ...) |
| 3492 | (eval-when (eval load compile expand) |
| 3493 | (call-with-deferred-observers |
| 3494 | (lambda () |
| 3495 | (module-export! (current-module) '(name ...)))))))) |
| 3496 | |
| 3497 | (define-syntax re-export |
| 3498 | (syntax-rules () |
| 3499 | ((_ name ...) |
| 3500 | (eval-when (eval load compile expand) |
| 3501 | (call-with-deferred-observers |
| 3502 | (lambda () |
| 3503 | (module-re-export! (current-module) '(name ...)))))))) |
| 3504 | |
| 3505 | (define-syntax export-syntax |
| 3506 | (syntax-rules () |
| 3507 | ((_ name ...) |
| 3508 | (export name ...)))) |
| 3509 | |
| 3510 | (define-syntax re-export-syntax |
| 3511 | (syntax-rules () |
| 3512 | ((_ name ...) |
| 3513 | (re-export name ...)))) |
| 3514 | |
| 3515 | (define load load-module) |
| 3516 | |
| 3517 | \f |
| 3518 | |
| 3519 | ;;; {Parameters} |
| 3520 | ;;; |
| 3521 | |
| 3522 | (define make-mutable-parameter |
| 3523 | (let ((make (lambda (fluid converter) |
| 3524 | (lambda args |
| 3525 | (if (null? args) |
| 3526 | (fluid-ref fluid) |
| 3527 | (fluid-set! fluid (converter (car args)))))))) |
| 3528 | (lambda (init . converter) |
| 3529 | (let ((fluid (make-fluid)) |
| 3530 | (converter (if (null? converter) |
| 3531 | identity |
| 3532 | (car converter)))) |
| 3533 | (fluid-set! fluid (converter init)) |
| 3534 | (make fluid converter))))) |
| 3535 | |
| 3536 | \f |
| 3537 | |
| 3538 | ;;; {Handling of duplicate imported bindings} |
| 3539 | ;;; |
| 3540 | |
| 3541 | ;; Duplicate handlers take the following arguments: |
| 3542 | ;; |
| 3543 | ;; module importing module |
| 3544 | ;; name conflicting name |
| 3545 | ;; int1 old interface where name occurs |
| 3546 | ;; val1 value of binding in old interface |
| 3547 | ;; int2 new interface where name occurs |
| 3548 | ;; val2 value of binding in new interface |
| 3549 | ;; var previous resolution or #f |
| 3550 | ;; val value of previous resolution |
| 3551 | ;; |
| 3552 | ;; A duplicate handler can take three alternative actions: |
| 3553 | ;; |
| 3554 | ;; 1. return #f => leave responsibility to next handler |
| 3555 | ;; 2. exit with an error |
| 3556 | ;; 3. return a variable resolving the conflict |
| 3557 | ;; |
| 3558 | |
| 3559 | (define duplicate-handlers |
| 3560 | (let ((m (make-module 7))) |
| 3561 | |
| 3562 | (define (check module name int1 val1 int2 val2 var val) |
| 3563 | (scm-error 'misc-error |
| 3564 | #f |
| 3565 | "~A: `~A' imported from both ~A and ~A" |
| 3566 | (list (module-name module) |
| 3567 | name |
| 3568 | (module-name int1) |
| 3569 | (module-name int2)) |
| 3570 | #f)) |
| 3571 | |
| 3572 | (define (warn module name int1 val1 int2 val2 var val) |
| 3573 | (format (current-error-port) |
| 3574 | "WARNING: ~A: `~A' imported from both ~A and ~A\n" |
| 3575 | (module-name module) |
| 3576 | name |
| 3577 | (module-name int1) |
| 3578 | (module-name int2)) |
| 3579 | #f) |
| 3580 | |
| 3581 | (define (replace module name int1 val1 int2 val2 var val) |
| 3582 | (let ((old (or (and var (object-property var 'replace) var) |
| 3583 | (module-variable int1 name))) |
| 3584 | (new (module-variable int2 name))) |
| 3585 | (if (object-property old 'replace) |
| 3586 | (and (or (eq? old new) |
| 3587 | (not (object-property new 'replace))) |
| 3588 | old) |
| 3589 | (and (object-property new 'replace) |
| 3590 | new)))) |
| 3591 | |
| 3592 | (define (warn-override-core module name int1 val1 int2 val2 var val) |
| 3593 | (and (eq? int1 the-scm-module) |
| 3594 | (begin |
| 3595 | (format (current-error-port) |
| 3596 | "WARNING: ~A: imported module ~A overrides core binding `~A'\n" |
| 3597 | (module-name module) |
| 3598 | (module-name int2) |
| 3599 | name) |
| 3600 | (module-local-variable int2 name)))) |
| 3601 | |
| 3602 | (define (first module name int1 val1 int2 val2 var val) |
| 3603 | (or var (module-local-variable int1 name))) |
| 3604 | |
| 3605 | (define (last module name int1 val1 int2 val2 var val) |
| 3606 | (module-local-variable int2 name)) |
| 3607 | |
| 3608 | (define (noop module name int1 val1 int2 val2 var val) |
| 3609 | #f) |
| 3610 | |
| 3611 | (set-module-name! m 'duplicate-handlers) |
| 3612 | (set-module-kind! m 'interface) |
| 3613 | (module-define! m 'check check) |
| 3614 | (module-define! m 'warn warn) |
| 3615 | (module-define! m 'replace replace) |
| 3616 | (module-define! m 'warn-override-core warn-override-core) |
| 3617 | (module-define! m 'first first) |
| 3618 | (module-define! m 'last last) |
| 3619 | (module-define! m 'merge-generics noop) |
| 3620 | (module-define! m 'merge-accessors noop) |
| 3621 | m)) |
| 3622 | |
| 3623 | (define (lookup-duplicates-handlers handler-names) |
| 3624 | (and handler-names |
| 3625 | (map (lambda (handler-name) |
| 3626 | (or (module-symbol-local-binding |
| 3627 | duplicate-handlers handler-name #f) |
| 3628 | (error "invalid duplicate handler name:" |
| 3629 | handler-name))) |
| 3630 | (if (list? handler-names) |
| 3631 | handler-names |
| 3632 | (list handler-names))))) |
| 3633 | |
| 3634 | (define default-duplicate-binding-procedures |
| 3635 | (make-mutable-parameter #f)) |
| 3636 | |
| 3637 | (define default-duplicate-binding-handler |
| 3638 | (make-mutable-parameter '(replace warn-override-core warn last) |
| 3639 | (lambda (handler-names) |
| 3640 | (default-duplicate-binding-procedures |
| 3641 | (lookup-duplicates-handlers handler-names)) |
| 3642 | handler-names))) |
| 3643 | |
| 3644 | \f |
| 3645 | |
| 3646 | ;;; {`cond-expand' for SRFI-0 support.} |
| 3647 | ;;; |
| 3648 | ;;; This syntactic form expands into different commands or |
| 3649 | ;;; definitions, depending on the features provided by the Scheme |
| 3650 | ;;; implementation. |
| 3651 | ;;; |
| 3652 | ;;; Syntax: |
| 3653 | ;;; |
| 3654 | ;;; <cond-expand> |
| 3655 | ;;; --> (cond-expand <cond-expand-clause>+) |
| 3656 | ;;; | (cond-expand <cond-expand-clause>* (else <command-or-definition>)) |
| 3657 | ;;; <cond-expand-clause> |
| 3658 | ;;; --> (<feature-requirement> <command-or-definition>*) |
| 3659 | ;;; <feature-requirement> |
| 3660 | ;;; --> <feature-identifier> |
| 3661 | ;;; | (and <feature-requirement>*) |
| 3662 | ;;; | (or <feature-requirement>*) |
| 3663 | ;;; | (not <feature-requirement>) |
| 3664 | ;;; <feature-identifier> |
| 3665 | ;;; --> <a symbol which is the name or alias of a SRFI> |
| 3666 | ;;; |
| 3667 | ;;; Additionally, this implementation provides the |
| 3668 | ;;; <feature-identifier>s `guile' and `r5rs', so that programs can |
| 3669 | ;;; determine the implementation type and the supported standard. |
| 3670 | ;;; |
| 3671 | ;;; Currently, the following feature identifiers are supported: |
| 3672 | ;;; |
| 3673 | ;;; guile r5rs srfi-0 srfi-4 srfi-6 srfi-13 srfi-14 srfi-55 srfi-61 |
| 3674 | ;;; |
| 3675 | ;;; Remember to update the features list when adding more SRFIs. |
| 3676 | ;;; |
| 3677 | |
| 3678 | (define %cond-expand-features |
| 3679 | ;; Adjust the above comment when changing this. |
| 3680 | '(guile |
| 3681 | guile-2 |
| 3682 | r5rs |
| 3683 | srfi-0 ;; cond-expand itself |
| 3684 | srfi-4 ;; homogenous numeric vectors |
| 3685 | srfi-6 ;; open-input-string etc, in the guile core |
| 3686 | srfi-13 ;; string library |
| 3687 | srfi-14 ;; character sets |
| 3688 | srfi-55 ;; require-extension |
| 3689 | srfi-61 ;; general cond clause |
| 3690 | )) |
| 3691 | |
| 3692 | ;; This table maps module public interfaces to the list of features. |
| 3693 | ;; |
| 3694 | (define %cond-expand-table (make-hash-table 31)) |
| 3695 | |
| 3696 | ;; Add one or more features to the `cond-expand' feature list of the |
| 3697 | ;; module `module'. |
| 3698 | ;; |
| 3699 | (define (cond-expand-provide module features) |
| 3700 | (let ((mod (module-public-interface module))) |
| 3701 | (and mod |
| 3702 | (hashq-set! %cond-expand-table mod |
| 3703 | (append (hashq-ref %cond-expand-table mod '()) |
| 3704 | features))))) |
| 3705 | |
| 3706 | (define-macro (cond-expand . clauses) |
| 3707 | (let ((syntax-error (lambda (cl) |
| 3708 | (error "invalid clause in `cond-expand'" cl)))) |
| 3709 | (letrec |
| 3710 | ((test-clause |
| 3711 | (lambda (clause) |
| 3712 | (cond |
| 3713 | ((symbol? clause) |
| 3714 | (or (memq clause %cond-expand-features) |
| 3715 | (let lp ((uses (module-uses (current-module)))) |
| 3716 | (if (pair? uses) |
| 3717 | (or (memq clause |
| 3718 | (hashq-ref %cond-expand-table |
| 3719 | (car uses) '())) |
| 3720 | (lp (cdr uses))) |
| 3721 | #f)))) |
| 3722 | ((pair? clause) |
| 3723 | (cond |
| 3724 | ((eq? 'and (car clause)) |
| 3725 | (let lp ((l (cdr clause))) |
| 3726 | (cond ((null? l) |
| 3727 | #t) |
| 3728 | ((pair? l) |
| 3729 | (and (test-clause (car l)) (lp (cdr l)))) |
| 3730 | (else |
| 3731 | (syntax-error clause))))) |
| 3732 | ((eq? 'or (car clause)) |
| 3733 | (let lp ((l (cdr clause))) |
| 3734 | (cond ((null? l) |
| 3735 | #f) |
| 3736 | ((pair? l) |
| 3737 | (or (test-clause (car l)) (lp (cdr l)))) |
| 3738 | (else |
| 3739 | (syntax-error clause))))) |
| 3740 | ((eq? 'not (car clause)) |
| 3741 | (cond ((not (pair? (cdr clause))) |
| 3742 | (syntax-error clause)) |
| 3743 | ((pair? (cddr clause)) |
| 3744 | ((syntax-error clause)))) |
| 3745 | (not (test-clause (cadr clause)))) |
| 3746 | (else |
| 3747 | (syntax-error clause)))) |
| 3748 | (else |
| 3749 | (syntax-error clause)))))) |
| 3750 | (let lp ((c clauses)) |
| 3751 | (cond |
| 3752 | ((null? c) |
| 3753 | (error "Unfulfilled `cond-expand'")) |
| 3754 | ((not (pair? c)) |
| 3755 | (syntax-error c)) |
| 3756 | ((not (pair? (car c))) |
| 3757 | (syntax-error (car c))) |
| 3758 | ((test-clause (caar c)) |
| 3759 | `(begin ,@(cdar c))) |
| 3760 | ((eq? (caar c) 'else) |
| 3761 | (if (pair? (cdr c)) |
| 3762 | (syntax-error c)) |
| 3763 | `(begin ,@(cdar c))) |
| 3764 | (else |
| 3765 | (lp (cdr c)))))))) |
| 3766 | |
| 3767 | ;; This procedure gets called from the startup code with a list of |
| 3768 | ;; numbers, which are the numbers of the SRFIs to be loaded on startup. |
| 3769 | ;; |
| 3770 | (define (use-srfis srfis) |
| 3771 | (process-use-modules |
| 3772 | (map (lambda (num) |
| 3773 | (list (list 'srfi (string->symbol |
| 3774 | (string-append "srfi-" (number->string num)))))) |
| 3775 | srfis))) |
| 3776 | |
| 3777 | \f |
| 3778 | |
| 3779 | ;;; srfi-55: require-extension |
| 3780 | ;;; |
| 3781 | |
| 3782 | (define-macro (require-extension extension-spec) |
| 3783 | ;; This macro only handles the srfi extension, which, at present, is |
| 3784 | ;; the only one defined by the standard. |
| 3785 | (if (not (pair? extension-spec)) |
| 3786 | (scm-error 'wrong-type-arg "require-extension" |
| 3787 | "Not an extension: ~S" (list extension-spec) #f)) |
| 3788 | (let ((extension (car extension-spec)) |
| 3789 | (extension-args (cdr extension-spec))) |
| 3790 | (case extension |
| 3791 | ((srfi) |
| 3792 | (let ((use-list '())) |
| 3793 | (for-each |
| 3794 | (lambda (i) |
| 3795 | (if (not (integer? i)) |
| 3796 | (scm-error 'wrong-type-arg "require-extension" |
| 3797 | "Invalid srfi name: ~S" (list i) #f)) |
| 3798 | (let ((srfi-sym (string->symbol |
| 3799 | (string-append "srfi-" (number->string i))))) |
| 3800 | (if (not (memq srfi-sym %cond-expand-features)) |
| 3801 | (set! use-list (cons `(use-modules (srfi ,srfi-sym)) |
| 3802 | use-list))))) |
| 3803 | extension-args) |
| 3804 | (if (pair? use-list) |
| 3805 | ;; i.e. (begin (use-modules x) (use-modules y) (use-modules z)) |
| 3806 | `(begin ,@(reverse! use-list))))) |
| 3807 | (else |
| 3808 | (scm-error |
| 3809 | 'wrong-type-arg "require-extension" |
| 3810 | "Not a recognized extension type: ~S" (list extension) #f))))) |
| 3811 | |
| 3812 | \f |
| 3813 | |
| 3814 | ;;; {Load emacs interface support if emacs option is given.} |
| 3815 | ;;; |
| 3816 | |
| 3817 | (define (named-module-use! user usee) |
| 3818 | (module-use! (resolve-module user) (resolve-interface usee))) |
| 3819 | |
| 3820 | (define (load-emacs-interface) |
| 3821 | (and (provided? 'debug-extensions) |
| 3822 | (debug-enable 'backtrace)) |
| 3823 | (named-module-use! '(guile-user) '(ice-9 emacs))) |
| 3824 | |
| 3825 | \f |
| 3826 | |
| 3827 | (define using-readline? |
| 3828 | (let ((using-readline? (make-fluid))) |
| 3829 | (make-procedure-with-setter |
| 3830 | (lambda () (fluid-ref using-readline?)) |
| 3831 | (lambda (v) (fluid-set! using-readline? v))))) |
| 3832 | |
| 3833 | (define (top-repl) |
| 3834 | (let ((guile-user-module (resolve-module '(guile-user)))) |
| 3835 | |
| 3836 | ;; Load emacs interface support if emacs option is given. |
| 3837 | (if (and (module-defined? guile-user-module 'use-emacs-interface) |
| 3838 | (module-ref guile-user-module 'use-emacs-interface)) |
| 3839 | (load-emacs-interface)) |
| 3840 | |
| 3841 | ;; Use some convenient modules (in reverse order) |
| 3842 | |
| 3843 | (set-current-module guile-user-module) |
| 3844 | (process-use-modules |
| 3845 | (append |
| 3846 | '(((ice-9 r5rs)) |
| 3847 | ((ice-9 session)) |
| 3848 | ((ice-9 debug))) |
| 3849 | (if (provided? 'regex) |
| 3850 | '(((ice-9 regex))) |
| 3851 | '()) |
| 3852 | (if (provided? 'threads) |
| 3853 | '(((ice-9 threads))) |
| 3854 | '()))) |
| 3855 | ;; load debugger on demand |
| 3856 | (module-autoload! guile-user-module '(system vm debug) '(debug)) |
| 3857 | |
| 3858 | ;; Note: SIGFPE, SIGSEGV and SIGBUS are actually "query-only" (see |
| 3859 | ;; scmsigs.c scm_sigaction_for_thread), so the handlers setup here have |
| 3860 | ;; no effect. |
| 3861 | (let ((old-handlers #f) |
| 3862 | (start-repl (module-ref (resolve-interface '(system repl repl)) |
| 3863 | 'start-repl)) |
| 3864 | (signals (if (provided? 'posix) |
| 3865 | `((,SIGINT . "User interrupt") |
| 3866 | (,SIGFPE . "Arithmetic error") |
| 3867 | (,SIGSEGV |
| 3868 | . "Bad memory access (Segmentation violation)")) |
| 3869 | '()))) |
| 3870 | ;; no SIGBUS on mingw |
| 3871 | (if (defined? 'SIGBUS) |
| 3872 | (set! signals (acons SIGBUS "Bad memory access (bus error)" |
| 3873 | signals))) |
| 3874 | |
| 3875 | (dynamic-wind |
| 3876 | |
| 3877 | ;; call at entry |
| 3878 | (lambda () |
| 3879 | (let ((make-handler (lambda (msg) |
| 3880 | (lambda (sig) |
| 3881 | ;; Make a backup copy of the stack |
| 3882 | (fluid-set! before-signal-stack |
| 3883 | (fluid-ref the-last-stack)) |
| 3884 | (save-stack 2) |
| 3885 | (scm-error 'signal |
| 3886 | #f |
| 3887 | msg |
| 3888 | #f |
| 3889 | (list sig)))))) |
| 3890 | (set! old-handlers |
| 3891 | (map (lambda (sig-msg) |
| 3892 | (sigaction (car sig-msg) |
| 3893 | (make-handler (cdr sig-msg)))) |
| 3894 | signals)))) |
| 3895 | |
| 3896 | ;; the protected thunk. |
| 3897 | (lambda () |
| 3898 | (let ((status (start-repl 'scheme))) |
| 3899 | (run-hook exit-hook) |
| 3900 | status)) |
| 3901 | |
| 3902 | ;; call at exit. |
| 3903 | (lambda () |
| 3904 | (map (lambda (sig-msg old-handler) |
| 3905 | (if (not (car old-handler)) |
| 3906 | ;; restore original C handler. |
| 3907 | (sigaction (car sig-msg) #f) |
| 3908 | ;; restore Scheme handler, SIG_IGN or SIG_DFL. |
| 3909 | (sigaction (car sig-msg) |
| 3910 | (car old-handler) |
| 3911 | (cdr old-handler)))) |
| 3912 | signals old-handlers)))))) |
| 3913 | |
| 3914 | ;;; This hook is run at the very end of an interactive session. |
| 3915 | ;;; |
| 3916 | (define exit-hook (make-hook)) |
| 3917 | |
| 3918 | \f |
| 3919 | |
| 3920 | ;;; {Deprecated stuff} |
| 3921 | ;;; |
| 3922 | |
| 3923 | (begin-deprecated |
| 3924 | (module-use! the-scm-module (resolve-interface '(ice-9 deprecated)))) |
| 3925 | |
| 3926 | \f |
| 3927 | |
| 3928 | ;;; Place the user in the guile-user module. |
| 3929 | ;;; |
| 3930 | |
| 3931 | ;;; FIXME: annotate ? |
| 3932 | ;; (define (syncase exp) |
| 3933 | ;; (with-fluids ((expansion-eval-closure |
| 3934 | ;; (module-eval-closure (current-module)))) |
| 3935 | ;; (deannotate/source-properties (macroexpand (annotate exp))))) |
| 3936 | |
| 3937 | ;; FIXME: |
| 3938 | (module-use! the-scm-module (resolve-interface '(srfi srfi-4))) |
| 3939 | |
| 3940 | (define-module (guile-user) |
| 3941 | #:autoload (system base compile) (compile)) |
| 3942 | |
| 3943 | ;; Remain in the `(guile)' module at compilation-time so that the |
| 3944 | ;; `-Wunused-toplevel' warning works as expected. |
| 3945 | (eval-when (compile) (set-current-module the-root-module)) |
| 3946 | |
| 3947 | ;;; boot-9.scm ends here |