1 ;;; cl-macs.el --- Common Lisp extensions for GNU Emacs Lisp (part four)
3 ;; Copyright (C) 1993 Free Software Foundation, Inc.
4 ;; Copyright (C) 2002 Ben Wing.
6 ;; Author: Dave Gillespie <daveg@synaptics.com>
8 ;; Keywords: extensions
10 ;; This file is part of SXEmacs.
12 ;; SXEmacs is free software: you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation, either version 3 of the License, or
15 ;; (at your option) any later version.
17 ;; SXEmacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with this program. If not, see <http://www.gnu.org/licenses/>.
25 ;;; Synched up with: FSF 19.34.
29 ;; These are extensions to Emacs Lisp that provide a degree of
30 ;; Common Lisp compatibility, beyond what is already built-in
33 ;; This package was written by Dave Gillespie; it is a complete
34 ;; rewrite of Cesar Quiroz's original cl.el package of December 1986.
36 ;; This package works with Emacs 18, Emacs 19, and Lucid Emacs 19.
38 ;; Bug reports, comments, and suggestions are welcome!
40 ;; This file contains the portions of the Common Lisp extensions
41 ;; package which should be autoloaded, but need only be present
42 ;; if the compiler or interpreter is used---this file is not
43 ;; necessary for executing compiled code.
45 ;; See cl.el for Change Log.
50 (or (memq 'cl-19 features)
51 (error "Tried to load `cl-macs' before `cl'!"))
54 ;;; We define these here so that this file can compile without having
55 ;;; loaded the cl.el file already.
57 (defmacro cl-push (x place) (list 'setq place (list 'cons x place)))
58 (defmacro cl-pop (place)
59 (list 'car (list 'prog1 place (list 'setq place (list 'cdr place)))))
60 (defmacro cl-pop2 (place)
61 (list 'prog1 (list 'car (list 'cdr place))
62 (list 'setq place (list 'cdr (list 'cdr place)))))
63 (put 'cl-push 'edebug-form-spec 'edebug-sexps)
64 (put 'cl-pop 'edebug-form-spec 'edebug-sexps)
65 (put 'cl-pop2 'edebug-form-spec 'edebug-sexps)
67 (defvar cl-emacs-type)
68 (defvar cl-optimize-safety)
69 (defvar cl-optimize-speed)
72 ;;; This kludge allows macros which use cl-transform-function-property
73 ;;; to be called at compile-time.
77 (or (fboundp 'defalias) (fset 'defalias 'fset))
78 (or (fboundp 'cl-transform-function-property)
79 (defalias 'cl-transform-function-property
81 (list 'put (list 'quote n) (list 'quote p)
82 (list 'function (cons 'lambda f))))))
88 (defvar cl-old-bc-file-form nil)
90 ;; Patch broken Emacs 18 compiler (re top-level macros).
91 ;; Emacs 19 compiler doesn't need this patch.
92 ;; Also, undo broken definition of `eql' that uses same bytecode as `eq'.
95 (defun cl-compile-time-init ()
96 (setq cl-old-bc-file-form (symbol-function 'byte-compile-file-form))
97 (or (fboundp 'byte-compile-flush-pending) ; Emacs 19 compiler?
98 (defalias 'byte-compile-file-form
100 (setq form (macroexpand form byte-compile-macro-environment))
101 (if (eq (car-safe form) 'progn)
102 (cons 'progn (mapcar 'byte-compile-file-form (cdr form)))
103 (funcall cl-old-bc-file-form form)))))
104 (put 'eql 'byte-compile 'cl-byte-compile-compiler-macro)
105 (run-hooks 'cl-hack-bytecomp-hook))
108 ;;; Program structure.
111 (defmacro defun* (name args &rest body)
112 "(defun* NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
113 Like normal `defun', except ARGLIST allows full Common Lisp conventions,
114 and BODY is implicitly surrounded by (block NAME ...)."
115 (let* ((res (cl-transform-lambda (cons args body) name))
116 (form (list* 'defun name (cdr res))))
117 (if (car res) (list 'progn (car res) form) form)))
120 (defmacro defmacro* (name args &rest body)
121 "(defmacro* NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
122 Like normal `defmacro', except ARGLIST allows full Common Lisp conventions,
123 and BODY is implicitly surrounded by (block NAME ...)."
124 (let* ((res (cl-transform-lambda (cons args body) name))
125 (form (list* 'defmacro name (cdr res))))
126 (if (car res) (list 'progn (car res) form) form)))
129 (defmacro function* (func)
130 "(function* SYMBOL-OR-LAMBDA): introduce a function.
131 Like normal `function', except that if argument is a lambda form, its
132 ARGLIST allows full Common Lisp conventions."
133 (if (eq (car-safe func) 'lambda)
134 (let* ((res (cl-transform-lambda (cdr func) 'cl-none))
135 (form (list 'function (cons 'lambda (cdr res)))))
136 (if (car res) (list 'progn (car res) form) form))
137 (list 'function func)))
139 (defun cl-transform-function-property (func prop form)
140 (let ((res (cl-transform-lambda form func)))
141 (append '(progn) (cdr (cdr (car res)))
142 (list (list 'put (list 'quote func) (list 'quote prop)
143 (list 'function (cons 'lambda (cdr res))))))))
145 (defconst lambda-list-keywords
146 '(&optional &rest &key &allow-other-keys &aux &whole &body &environment))
148 (defvar cl-macro-environment nil)
149 (defvar bind-block) (defvar bind-defs) (defvar bind-enquote)
150 (defvar bind-inits) (defvar bind-lets) (defvar bind-forms)
154 (defun cl-upcase-arg (arg)
155 ;; Changes all non-keyword symbols in `ARG' to symbols
156 ;; with name in upper case.
157 ;; ARG is either symbol or list of symbols or lists
159 ;; Do not upcase &optional, &key etc.
160 (if (memq arg lambda-list-keywords)
162 (make-symbol (upcase (symbol-name arg)))))
164 (let ((arg (copy-list arg)) junk)
166 (let ((p (last arg))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
167 (if (setq junk (cadr (memq '&cl-defs arg)))
168 (setq arg (delq '&cl-defs (delq junk arg))))
169 (if (memq '&cl-quote arg)
170 (setq arg (delq '&cl-quote arg)))
171 (mapcar 'cl-upcase-arg arg)))
172 (t arg))) ; Maybe we are in initializer
176 (defun cl-function-arglist (name arglist)
177 "Returns string with printed representation of arguments list.
178 Supports Common Lisp lambda lists."
179 (if (not (or (listp arglist) (symbolp arglist)))
181 (check-argument-type #'true-list-p arglist)
182 (let ((print-gensym nil))
185 (cons (if (eq name 'cl-none) 'lambda name)
186 (cond ((null arglist) nil)
187 ((listp arglist) (cl-upcase-arg arglist))
189 (cl-upcase-arg (list '&rest arglist)))
190 (t (wrong-type-argument 'listp arglist)))))
191 (t "Not available")))))
193 (defun cl-transform-lambda (form bind-block)
194 (let* ((args (car form)) (body (cdr form))
195 (bind-defs nil) (bind-enquote nil)
196 (bind-inits nil) (bind-lets nil) (bind-forms nil)
197 (header nil) (simple-args nil)
198 (complex-arglist (cl-function-arglist bind-block args))
200 (while (or (stringp (car body)) (eq (car-safe (car body)) 'interactive))
201 (push (pop body) header))
202 (setq args (if (listp args) (copy-list args) (list '&rest args)))
203 (let ((p (last args))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
204 (if (setq bind-defs (cadr (memq '&cl-defs args)))
205 (setq args (delq '&cl-defs (delq bind-defs args))
206 bind-defs (cadr bind-defs)))
207 (if (setq bind-enquote (memq '&cl-quote args))
208 (setq args (delq '&cl-quote args)))
209 (if (memq '&whole args) (error "&whole not currently implemented"))
210 (let* ((p (memq '&environment args)) (v (cadr p)))
211 (if p (setq args (nconc (delq (car p) (delq v args))
212 (list '&aux (list v 'cl-macro-environment))))))
213 (while (and args (symbolp (car args))
214 (not (memq (car args) '(nil &rest &body &key &aux)))
215 (not (and (eq (car args) '&optional)
216 (or bind-defs (consp (cadr args))))))
217 (push (pop args) simple-args))
218 (or (eq bind-block 'cl-none)
219 (setq body (list (list* 'block bind-block body))))
220 (setq simple-args (nreverse simple-args)
221 header (nreverse header))
222 ;; Add CL lambda list to documentation, if the CL lambda list differs
223 ;; from the non-CL lambda list. npak@ispras.ru
224 (unless (equal complex-arglist
225 (cl-function-arglist bind-block simple-args))
226 (and (stringp (car header)) (setq doc (pop header)))
228 "\n\nCommon Lisp lambda list:\n"
229 " " complex-arglist "\n\n")
232 (list* nil simple-args (nconc header body))
233 (if (memq '&optional simple-args) (push '&optional args))
234 (cl-do-arglist args nil (- (length simple-args)
235 (if (memq '&optional simple-args) 1 0)))
236 (setq bind-lets (nreverse bind-lets))
237 (list* (and bind-inits (list* 'eval-when '(compile load eval)
238 (nreverse bind-inits)))
240 (list '&rest (car (pop bind-lets))))
241 ;; XEmacs change: we add usage information using Nickolay's
244 (list (nconc (list 'let* bind-lets)
245 (nreverse bind-forms) body)))))))
247 (defun cl-do-arglist (args expr &optional num) ; uses bind-*
249 (if (or (memq args lambda-list-keywords) (not (symbolp args)))
250 (error "Invalid argument name: %s" args)
251 (cl-push (list args expr) bind-lets))
252 (setq args (copy-list args))
253 (let ((p (last args))) (if (cdr p) (setcdr p (list '&rest (cdr p)))))
254 (let ((p (memq '&body args))) (if p (setcar p '&rest)))
255 (if (memq '&environment args) (error "&environment used incorrectly"))
256 (let ((save-args args)
257 (restarg (memq '&rest args))
258 (safety (if (cl-compiling-file) cl-optimize-safety 3))
260 (laterarg nil) (exactarg nil) minarg)
261 (or num (setq num 0))
262 (if (listp (cadr restarg))
263 (setq restarg (gensym "--rest--"))
264 (setq restarg (cadr restarg)))
265 (cl-push (list restarg expr) bind-lets)
266 (if (eq (car args) '&whole)
267 (cl-push (list (cl-pop2 args) restarg) bind-lets))
269 (setq minarg restarg)
270 (while (and p (not (memq (car p) lambda-list-keywords)))
271 (or (eq p args) (setq minarg (list 'cdr minarg)))
273 (if (memq (car p) '(nil &aux))
274 (setq minarg (list '= (list 'length restarg)
275 (length (ldiff args p)))
276 exactarg (not (eq args p)))))
277 (while (and args (not (memq (car args) lambda-list-keywords)))
278 (let ((poparg (list (if (or (cdr args) (not exactarg)) 'pop 'car)
282 (if (or laterarg (= safety 0)) poparg
283 (list 'if minarg poparg
284 (list 'signal '(quote wrong-number-of-arguments)
285 (list 'list (and (not (eq bind-block 'cl-none))
286 (list 'quote bind-block))
287 (list 'length restarg)))))))
288 (setq num (1+ num) laterarg t))
289 (while (and (eq (car args) '&optional) (cl-pop args))
290 (while (and args (not (memq (car args) lambda-list-keywords)))
291 (let ((arg (cl-pop args)))
292 (or (consp arg) (setq arg (list arg)))
293 (if (cddr arg) (cl-do-arglist (nth 2 arg) (list 'and restarg t)))
294 (let ((def (if (cdr arg) (nth 1 arg)
296 (nth 1 (assq (car arg) bind-defs)))))
297 (poparg (list 'pop restarg)))
298 (and def bind-enquote (setq def (list 'quote def)))
299 (cl-do-arglist (car arg)
300 (if def (list 'if restarg poparg def) poparg))
301 (setq num (1+ num))))))
302 (if (eq (car args) '&rest)
303 (let ((arg (cl-pop2 args)))
304 (if (consp arg) (cl-do-arglist arg restarg)))
305 (or (eq (car args) '&key) (= safety 0) exactarg
306 (cl-push (list 'if restarg
307 (list 'signal '(quote wrong-number-of-arguments)
309 (and (not (eq bind-block 'cl-none))
310 (list 'quote bind-block))
311 (list '+ num (list 'length restarg)))))
313 (while (and (eq (car args) '&key) (cl-pop args))
314 (while (and args (not (memq (car args) lambda-list-keywords)))
315 (let ((arg (cl-pop args)))
316 (or (consp arg) (setq arg (list arg)))
317 (let* ((karg (if (consp (car arg)) (caar arg)
318 (intern (format ":%s" (car arg)))))
319 (varg (if (consp (car arg)) (cadar arg) (car arg)))
320 (def (if (cdr arg) (cadr arg)
321 (or (car bind-defs) (cadr (assq varg bind-defs)))))
322 (look (list 'memq (list 'quote karg) restarg)))
323 (and def bind-enquote (setq def (list 'quote def)))
325 (let* ((temp (or (nth 2 arg) (gensym)))
326 (val (list 'car (list 'cdr temp))))
327 (cl-do-arglist temp look)
330 (list 'prog1 val (list 'setq temp t))
339 (if (eq (cl-const-expr-p def) t)
342 (list nil (cl-const-expr-val def)))
343 (list 'list nil def))))))))
345 (if (= (aref (symbol-name karg) 0) ?:)
346 (progn (set karg karg)
347 (cl-push (list 'setq karg (list 'quote karg))
349 (setq keys (nreverse keys))
350 (or (and (eq (car args) '&allow-other-keys) (cl-pop args))
351 (null keys) (= safety 0)
352 (let* ((var (gensym "--keys--"))
353 (allow '(:allow-other-keys))
358 (list (list 'memq (list 'car var)
359 (list 'quote (append keys allow)))
360 (list 'setq var (list 'cdr (list 'cdr var))))
363 (list 'memq (cons 'quote allow)
365 (list 'setq var nil))
369 (format "Keyword argument %%s not one of %s"
371 (list 'car var)))))))
372 (cl-push (list 'let (list (list var restarg)) check) bind-forms)))
373 (while (and (eq (car args) '&aux) (cl-pop args))
374 (while (and args (not (memq (car args) lambda-list-keywords)))
375 (if (consp (car args))
376 (if (and bind-enquote (cadar args))
377 (cl-do-arglist (caar args)
378 (list 'quote (cadr (cl-pop args))))
379 (cl-do-arglist (caar args) (cadr (cl-pop args))))
380 (cl-do-arglist (cl-pop args) nil))))
381 (if args (error "Malformed argument list %s" save-args)))))
383 (defun cl-arglist-args (args)
384 (if (nlistp args) (list args)
385 (let ((res nil) (kind nil) arg)
387 (setq arg (cl-pop args))
388 (if (memq arg lambda-list-keywords) (setq kind arg)
389 (if (eq arg '&cl-defs) (cl-pop args)
390 (and (consp arg) kind (setq arg (car arg)))
391 (and (consp arg) (cdr arg) (eq kind '&key) (setq arg (cadr arg)))
392 (setq res (nconc res (cl-arglist-args arg))))))
393 (nconc res (and args (list args))))))
396 (defmacro destructuring-bind (args expr &rest body)
397 "Bind the arguments in ARGS to EXPR then eval BODY.
398 This is similar to `let' but it does \"destructuring\", in that it matches
399 the structure of ARGS to the structure of EXPR and binds corresponding
400 arguments in ARGS to their values in EXPR. The format of ARGS, and the
401 way the destructuring works, is exactly like the destructuring that occurs
402 in `defmacro*'; see that for more information.
404 An alternative means of destructuring is using the `loop' macro. `loop'
405 gives practical examples of destructuring. `defmacro*' describes the
406 differences between loop and macro-style destructuring.
408 You can rewrite a call to (destructuring-bind ARGS EXPR &rest BODY) using
409 `loop', approximately like this:
411 (loop for ARGS = EXPR
414 I say \"approximately\" because the destructuring works in a somewhat
415 different fashion, although for most reasonably simple constructs the
416 results will be the same."
417 (let* ((bind-lets nil) (bind-forms nil) (bind-inits nil)
418 (bind-defs nil) (bind-block 'cl-none))
419 (cl-do-arglist (or args '(&aux)) expr)
420 (append '(progn) bind-inits
421 (list (nconc (list 'let* (nreverse bind-lets))
422 (nreverse bind-forms) body)))))
425 ;;; The `eval-when' form.
427 (defvar cl-not-toplevel nil)
430 (defmacro eval-when (when &rest body)
431 "(eval-when (WHEN...) BODY...): control when BODY is evaluated.
432 If `compile' is in WHEN, BODY is evaluated when compiled at top-level.
433 If `load' is in WHEN, BODY is evaluated when loaded after top-level compile.
434 If `eval' is in WHEN, BODY is evaluated when interpreted or at non-top-level."
435 (if (and (fboundp 'cl-compiling-file) (cl-compiling-file)
436 (not cl-not-toplevel) (not (boundp 'for-effect))) ; horrible kludge
437 (let ((comp (or (memq 'compile when) (memq ':compile-toplevel when)))
439 (if (or (memq 'load when) (memq ':load-toplevel when))
440 (if comp (cons 'progn (mapcar 'cl-compile-time-too body))
441 (list* 'if nil nil body))
442 (progn (if comp (eval (cons 'progn body))) nil)))
443 (and (or (memq 'eval when) (memq ':execute when))
444 (cons 'progn body))))
446 (defun cl-compile-time-too (form)
447 (or (and (symbolp (car-safe form)) (get (car-safe form) 'byte-hunk-handler))
448 (setq form (macroexpand
449 form (cons '(eval-when) byte-compile-macro-environment))))
450 (cond ((eq (car-safe form) 'progn)
451 (cons 'progn (mapcar 'cl-compile-time-too (cdr form))))
452 ((eq (car-safe form) 'eval-when)
453 (let ((when (nth 1 form)))
454 (if (or (memq 'eval when) (memq ':execute when))
455 (list* 'eval-when (cons 'compile when) (cddr form))
457 (t (eval form) form)))
459 (or (and (fboundp 'eval-when-compile)
460 (not (eq (car-safe (symbol-function 'eval-when-compile)) 'autoload)))
461 (eval '(defmacro eval-when-compile (&rest body)
462 "Like `progn', but evaluates the body at compile time.
463 The result of the body appears to the compiler as a quoted constant."
464 (list 'quote (eval (cons 'progn body))))))
467 (defmacro load-time-value (form &optional read-only)
468 "Evaluate FORM once at load time if byte-compiled.
470 The result of FORM is returned and stored for later access. In
471 interpreted code, `load-time-value' is equivalent to `progn'."
474 ;;; Conditional control structures.
477 (defmacro case (expr &rest clauses)
478 "(case EXPR CLAUSES...): evals EXPR, chooses from CLAUSES on that value.
479 Each clause looks like (KEYLIST BODY...). EXPR is evaluated and compared
480 against each key in each KEYLIST; the corresponding BODY is evaluated.
481 If no clause succeeds, case returns nil. A single atom may be used in
482 place of a KEYLIST of one atom. A KEYLIST of `t' or `otherwise' is
483 allowed only in the final clause, and matches if no other keys match.
484 Key values are compared by `eql'."
485 (let* ((temp (if (cl-simple-expr-p expr 3) expr (gensym)))
487 (last-clause (car (last clauses)))
492 (cons (cond ((memq (car c) '(t otherwise))
493 (or (eq c last-clause)
495 "`%s' is allowed only as the last case clause"
498 ((eq (car c) 'ecase-error-flag)
499 (list 'error "ecase failed: %s, %s"
500 temp (list 'quote (reverse head-list))))
502 (setq head-list (append (car c) head-list))
503 (list 'member* temp (list 'quote (car c))))
505 (if (memq (car c) head-list)
506 (error "Duplicate key in case: %s"
508 (cl-push (car c) head-list)
509 (list 'eql temp (list 'quote (car c)))))
510 (or (cdr c) '(nil))))
512 (if (eq temp expr) body
513 (list 'let (list (list temp expr)) body))))
515 ;; #### CL standard also requires `ccase', which signals a continuable
516 ;; error (`cerror' in XEmacs). However, I don't think it buys us
517 ;; anything to introduce it, as there is probably much more CL stuff
518 ;; missing, and the feature is not essential. --hniksic
521 (defmacro ecase (expr &rest clauses)
522 "(ecase EXPR CLAUSES...): like `case', but error if no case fits.
523 `otherwise'-clauses are not allowed."
524 (let ((disallowed (or (assq t clauses)
525 (assq 'otherwise clauses))))
527 (error "`%s' is not allowed in ecase" (car disallowed))))
528 (list* 'case expr (append clauses '((ecase-error-flag)))))
531 (defmacro typecase (expr &rest clauses)
532 "(typecase EXPR CLAUSES...): evals EXPR, chooses from CLAUSES on that value.
533 Each clause looks like (TYPE BODY...). EXPR is evaluated and, if it
534 satisfies TYPE, the corresponding BODY is evaluated. If no clause succeeds,
535 typecase returns nil. A TYPE of `t' or `otherwise' is allowed only in the
536 final clause, and matches if no other keys match."
537 (let* ((temp (if (cl-simple-expr-p expr 3) expr (gensym)))
543 (cons (cond ((eq (car c) 'otherwise) t)
544 ((eq (car c) 'ecase-error-flag)
545 (list 'error "etypecase failed: %s, %s"
546 temp (list 'quote (reverse type-list))))
548 (cl-push (car c) type-list)
549 (cl-make-type-test temp (car c))))
550 (or (cdr c) '(nil))))
552 (if (eq temp expr) body
553 (list 'let (list (list temp expr)) body))))
556 (defmacro etypecase (expr &rest clauses)
557 "(etypecase EXPR CLAUSES...): like `typecase', but error if no case fits.
558 `otherwise'-clauses are not allowed."
559 (list* 'typecase expr (append clauses '((ecase-error-flag)))))
562 ;;; Blocks and exits.
565 (defmacro block (name &rest body)
566 "(block NAME BODY...): define a lexically-scoped block named NAME.
567 NAME may be any symbol. Code inside the BODY forms can call `return-from'
568 to jump prematurely out of the block. This differs from `catch' and `throw'
569 in two respects: First, the NAME is an unevaluated symbol rather than a
570 quoted symbol or other form; and second, NAME is lexically rather than
571 dynamically scoped: Only references to it within BODY will work. These
572 references may appear inside macro expansions, but not inside functions
574 (if (cl-safe-expr-p (cons 'progn body)) (cons 'progn body)
575 (list 'cl-block-wrapper
576 (list* 'catch (list 'quote (intern (format "--cl-block-%s--" name)))
579 (defvar cl-active-block-names nil)
581 (put 'cl-block-wrapper 'byte-compile 'cl-byte-compile-block)
582 (defun cl-byte-compile-block (cl-form)
583 (if (fboundp 'byte-compile-form-do-effect) ; Check for optimizing compiler
585 (let* ((cl-entry (cons (nth 1 (nth 1 (nth 1 cl-form))) nil))
586 (cl-active-block-names (cons cl-entry cl-active-block-names))
587 (cl-body (byte-compile-top-level
588 (cons 'progn (cddr (nth 1 cl-form))))))
590 (byte-compile-form (list 'catch (nth 1 (nth 1 cl-form)) cl-body))
591 (byte-compile-form cl-body))))
592 (byte-compile-form (nth 1 cl-form))))
594 (put 'cl-block-throw 'byte-compile 'cl-byte-compile-throw)
595 (defun cl-byte-compile-throw (cl-form)
596 (let ((cl-found (assq (nth 1 (nth 1 cl-form)) cl-active-block-names)))
597 (if cl-found (setcdr cl-found t)))
598 (byte-compile-normal-call (cons 'throw (cdr cl-form))))
601 (defmacro return (&optional res)
602 "(return [RESULT]): return from the block named nil.
603 This is equivalent to `(return-from nil RESULT)'."
604 (list 'return-from nil res))
607 (defmacro return-from (name &optional res)
608 "(return-from NAME [RESULT]): return from the block named NAME.
609 This jumps out to the innermost enclosing `(block NAME ...)' form,
610 returning RESULT from that form (or nil if RESULT is omitted).
611 This is compatible with Common Lisp, but note that `defun' and
612 `defmacro' do not create implicit blocks as they do in Common Lisp."
613 (let ((name2 (intern (format "--cl-block-%s--" name))))
614 (list 'cl-block-throw (list 'quote name2) res)))
617 ;;; The "loop" macro.
619 (defvar args) (defvar loop-accum-var) (defvar loop-accum-vars)
620 (defvar loop-bindings) (defvar loop-body) (defvar loop-destr-temps)
621 (defvar loop-finally) (defvar loop-finish-flag) (defvar loop-first-flag)
622 (defvar loop-initially) (defvar loop-map-form) (defvar loop-name)
623 (defvar loop-result) (defvar loop-result-explicit)
624 (defvar loop-result-var) (defvar loop-steps) (defvar loop-symbol-macs)
627 (defmacro loop (&rest args)
628 "(loop CLAUSE...): The Common Lisp `loop' macro.
630 Overview of valid clauses:
631 for VAR from/upfrom/downfrom NUM to/upto/downto/above/below NUM by NUM,
632 for VAR in LIST by FUNC, for VAR on LIST by FUNC, for VAR = INIT then EXPR,
633 for VAR across ARRAY, repeat NUM, with VAR = INIT, while COND, until COND,
634 always COND, never COND, thereis COND, collect EXPR into VAR,
635 append EXPR into VAR, nconc EXPR into VAR, sum EXPR into VAR,
636 count EXPR into VAR, maximize EXPR into VAR, minimize EXPR into VAR,
637 if COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...],
638 unless COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...],
639 do EXPRS..., initially EXPRS..., finally EXPRS..., return EXPR,
640 finally return EXPR, named NAME.
642 The loop macro consists of a series of clauses, which do things like
643 iterate variables, set conditions for exiting the loop, accumulating values
644 to be returned as the return value of the loop, and executing arbitrary
645 blocks of code. Each clause is proceed in turn, and the loop executes its
646 body repeatedly until an exit condition is hit.
648 It's important to understand that loop clauses such as `for' and `while',
649 which look like loop-establishing constructs, don't actually *establish* a
650 loop\; the looping is established by the `loop' clause itself, which will
651 repeatedly process its body until told to stop. `while' merely establishes
652 a condition which, when true, causes the loop to finish, and `for' sets a
653 variable to different values on each iteration (e.g. successive elements of
654 a list) and sets an exit condition when there are no more values. This
655 means, for example, that if two `for' clauses appear, you don't get two
656 nested loops, but instead two variables that are stepped in parallel, and
657 two exit conditions, either of which, if triggered, will cause the loop to
658 end. Similarly for a loop with a `for' and a `while' clause. For example:
665 In each successive iteration, X is set to the next element of the list. If
666 there are no more elements, or if any element is nil (the `while' clause),
667 the loop exits. Otherwise, the block of code following `do' is executed.)
669 This example also shows that some clauses establish variable bindings --
670 essentially like a `let' binding -- and that following clauses can
671 reference these variables. Furthermore, the entire loop is surrounded by a
672 block named nil (unless the `named' clause is given), so you can return
673 from the loop using the macro `return'. (The other way to exit the loop is
674 through the macro `loop-finish'. The difference is that some loop clauses
675 establish or accumulate a value to be returned, and `loop-finish' returns
676 this. `return', however, can only return an explicitly-specified value.
677 NOTE CAREFULLY: There is a loop clause called `return' as well as a
678 standard Lisp macro called `return'. Normally they work similarly\; but if
679 you give the loop a name with `named', you will need to use the macro
682 Another extremely useful feature of loops is called \"destructuring\". If,
683 in place of VAR, a list (possibly dotted, possibly a tree of arbitary
684 complexity) is given, the value to be assigned is assumed to have a similar
685 structure to the list given, and variables in the list will be matched up
686 with corresponding elements in the structure. For example:
689 for (x y) in '((foo 1) (bar 2) (baz 3))
690 do (puthash x y some-hash-table))
692 will add three elements to a hash table, mapping foo -> 1, bar -> 2, and
693 baz -> 3. As other examples, you can conveniently process alists using
695 \(loop for (x . y) in alist do ...)
699 \(loop for (x y) on plist by #'cddr do ...)
701 Destructuring is forgiving in that mismatches in the number of elements on
702 either size will be handled gracefully, either by ignoring or initializing
705 If you don't understand how a particular loop clause works, create an
706 example and use `macroexpand-sexp' to expand the macro.
708 In greater detail, valid clauses are:
710 \(NOTE: Keywords in lowercase\; slashes separate different possibilities
711 for keywords, some of which are synonymous\; brackets indicate optional
712 parts of the clause. In all of the clauses with `being', the word `being',
713 the words `each' or `the', and the difference between singular and plural
714 keywords are all just syntactic sugar. Stylistically, you should write
715 either `being each foo' or `being the foos'.)
717 for VAR from/upfrom/downfrom NUM1 to/upto/downto/above/below NUM2 [by NUMSTEP]
718 Step VAR across numbers. `upfrom', `upto', and `below' explicitly
719 indicate upward stepping\; `downfrom', `downto', and `above' explicitly
720 indicate downward stepping. (If none of these is given, the default is
721 upward.) `to', `upto', and `downto' cause stepping to include NUM2 as
722 the last iteration, while `above' and `below' stop just before reaching
723 NUM2. `by' can be given to indicate a stepping increment other than 1.
725 for VAR in LIST [by FUNC]
726 Step VAR over elements of a LIST. FUNC specifies how to get successive
727 sublists and defaults to `cdr'.
729 for VAR on LIST [by FUNC]
730 Step VAR over tails of a LIST. FUNC specifies how to get successive
731 sublists and defaults to `cdr'.
733 for VAR in-ref LIST [by FUNC]
734 Step VAR over elements of a LIST, like `for ... in', except the VAR is
735 bound using `symbol-macrolet' instead of `let'. In essence, VAR is set
736 to a \"reference\" to the list element instead of the element itself\;
737 this us, you can destructively modify the list using `setf' on VAR, and
738 any changes to the list will \"magically\" reflect themselves in
739 subsequent uses of VAR.
741 for VAR = INIT [then EXPR]
742 Set VAR on each iteration of the loop. If only INIT is given, use it
743 on each iteration. Otherwise, use INIT on the first iteration and EXPR
746 for VAR across/across-ref ARRAY
747 Step VAR across a sequence other than a list (string, vector, bit
748 vector). If `across-ref' is given, VAR is bound using
749 `symbol-macrolet' instead of `let' -- see above.
751 for VAR being each/the element/elements in/of/in-ref/of-ref SEQUENCE [using (index INDEX-VAR)]
752 Step VAR across any sequence. A variable can be specified with a
753 `using' phrase to receive the index, starting at 0. If `in-ref' or
754 `of-ref' is given, VAR is bound using `symbol-macrolet' instead of
757 for VAR being each/the hash-key/hash-keys/hash-value/hash-values in/of HASH-TABLE [using (hash-value/hash-key OTHER-VAR)]
759 for VAR being each/the hash-key/hash-keys/hash-value/hash-values in/of HASH-TABLE [using (hash-value/hash-key OTHER-VAR)]
760 Map VAR over a hash table. The various keywords are synonymous except
761 those that distinguish between keys and values. The `using' phrase is
762 optional and allows both key and value to be bound.
764 for VAR being each/the symbol/present-symbol/external-symbol/symbols/present-symbols/external-symbols in/of OBARRAY
765 Map VAR over the symbols in an obarray. All symbol keywords are
766 currently synonymous.
768 for VAR being each/the extent/extents [in/of BUFFER-OR-STRING] [from POS] [to POS]
769 Map VAR over the extents in a buffer or string, defaulting to the
770 current buffer, the beginning and the end, respectively.
772 for VAR being each/the interval/intervals [in/of BUFFER-OR-STRING] [property PROPERTY] [from POS] [to POS]
773 Map VAR over the intervals without property change in a buffer or
774 string, defaulting to the current buffer, the beginning and the end,
775 respectively. If PROPERTY is given, iteration occurs using
776 `next-single-property-change'\; otherwise, using
777 `next-property-change'.
779 for VAR being each/the window/windows [in/of FRAME]
780 Step VAR over the windows in FRAME, defaulting to the selected frame.
782 for VAR being each/the frame/frames
783 Step VAR over all frames.
785 for VAR being each/the buffer/buffers [by FUNC]
786 Step VAR over all buffers. This is actually equivalent to
787 `for VAR in (buffer-list) [by FUNC]'.
789 for VAR being each/the key-code/key-codes/key-seq/key-seqs/key-binding/key-bindings in KEYMAP [using (key-code/key-codes/key-seq/key-seqs/key-binding/key-bindings OTHER-VAR)]
790 Map VAR over the entries in a keymap. Keyword `key-seq' causes
791 recursive mapping over prefix keymaps occurring in the keymap, with VAR
792 getting the built-up sequence (a vector). Otherwise, mapping does not
793 occur recursively. `key-code' and `key-seq' refer to what is bound
794 (second argument of `define-key'), and `key-binding' what it's bound to
795 (third argument of `define-key').
798 `as' is a synonym for `for'.
801 `and' clauses have the same syntax as `for' clauses except that the
802 variables in the clause are bound in parallel with a preceding
803 `and'/`for' clause instead of in series.
806 Set VAR to INIT once, before doing any iterations.
809 Exit the loop if more than NUM iterations have occurred.
812 Exit the loop if COND isn't true.
815 Exit the loop if COND is true.
817 collect EXPR [into VAR]
818 Push EXPR onto the end of a list of values -- stored either in VAR or a
819 temporary variable that will be returned as the return value of the
820 loop if it terminates through an exit condition or a call to
823 append EXPR [into VAR]
824 Append EXPR (a list) onto the end of a list of values, like `collect'.
826 nconc EXPR [into VAR]
827 Nconc EXPR (a list) onto the end of a list of values, like `collect'.
829 concat EXPR [into VAR]
830 Concatenate EXPR (a string) onto the end of a string of values, like
833 vconcat EXPR [into VAR]
834 Concatenate EXPR (a vector) onto the end of a vector of values, like
837 bvconcat EXPR [into VAR]
838 Concatenate EXPR (a bit vector) onto the end of a bit vector of values,
842 Add EXPR to a value, like `collect'.
844 count EXPR [into VAR]
845 If EXPR is true, increment a value by 1, like `collect'.
847 maximize EXPR [into VAR]
848 IF EXPR is greater than a value, replace the value with EXPR, like
851 minimize EXPR [into VAR]
852 IF EXPR is less than a value, replace the value with EXPR, like
856 If COND is true, continue the loop and set the loop return value (the
857 same value that's manipulated by `collect' and friends and is returned
858 by a normal loop exit or an exit using `loop-finish') to t\; otherwise,
859 exit the loop and return nil. The effect is to determine and return
860 whether a condition is true \"always\" (all iterations of the loop).
863 If COND is false, continue the loop and set the loop return value (like
864 `always') to t\; otherwise, exit the loop and return nil. The effect
865 is to determine and return whether a condition is \"never\" true (all
866 iterations of the loop).
869 If COND is true, exit the loop and return COND.
871 if/when COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...]
872 If COND is true, execute the directly following clause(s)\; otherwise,
873 execute the clauses following `else'.
875 unless COND CLAUSE [and CLAUSE]... else CLAUSE [and CLAUSE...]
876 If COND is false, execute the directly following clause(s)\; otherwise, execute the clauses following `else'.
879 Execute the expressions (any Lisp forms).
882 Execute EXPR once, before doing any iterations, and after values have
883 been set using `with'.
886 Execute EXPR once, directly before the loop terminates. This will not
887 be executed if the loop terminates prematurely as a result of `always',
888 `never', `thereis', or `return'.
891 Exit from the loop and return EXPR.
894 Specify the value to be returned when the loop exits. (Unlike `return',
895 this doesn't cause the loop to immediately exit\; it will exit whenever
896 it normally would have.) This takes precedence over a return value
897 specified with `collect' and friends or `always' and friends.
900 Specify the name for block surrounding the loop, in place of nil.
903 (if (not (memq t (mapcar 'symbolp (delq nil (delq t (copy-list args))))))
904 (list 'block nil (list* 'while t args))
905 (let ((loop-name nil) (loop-bindings nil)
906 (loop-body nil) (loop-steps nil)
907 (loop-result nil) (loop-result-explicit nil)
908 (loop-result-var nil) (loop-finish-flag nil)
909 (loop-accum-var nil) (loop-accum-vars nil)
910 (loop-initially nil) (loop-finally nil)
911 (loop-map-form nil) (loop-first-flag nil)
912 (loop-destr-temps nil) (loop-symbol-macs nil))
913 (setq args (append args '(cl-end-loop)))
914 (while (not (eq (car args) 'cl-end-loop)) (cl-parse-loop-clause))
916 (cl-push (list (list loop-finish-flag t)) loop-bindings))
918 (progn (cl-push (list (list loop-first-flag t)) loop-bindings)
919 (cl-push (list 'setq loop-first-flag nil) loop-steps)))
920 (let* ((epilogue (nconc (nreverse loop-finally)
921 (list (or loop-result-explicit loop-result))))
922 (ands (cl-loop-build-ands (nreverse loop-body)))
923 (while-body (nconc (cadr ands) (nreverse loop-steps)))
925 (nreverse loop-initially)
926 (list (if loop-map-form
927 (list 'block '--cl-finish--
929 (if (eq (car ands) t) while-body
930 (cons (list 'or (car ands)
931 '(return-from --cl-finish--
934 '--cl-map loop-map-form))
935 (list* 'while (car ands) while-body)))
937 (if (equal epilogue '(nil)) (list loop-result-var)
938 (list (list 'if loop-finish-flag
939 (cons 'progn epilogue) loop-result-var)))
941 (if loop-result-var (cl-push (list loop-result-var) loop-bindings))
943 (if (cdar loop-bindings)
944 (setq body (list (cl-loop-let (cl-pop loop-bindings) body t)))
946 (while (and loop-bindings
947 (not (cdar loop-bindings)))
948 (cl-push (car (cl-pop loop-bindings)) lets))
949 (setq body (list (cl-loop-let lets body nil))))))
951 (setq body (list (list* 'symbol-macrolet loop-symbol-macs body))))
952 (list* 'block loop-name body)))))
954 (defun cl-parse-loop-clause () ; uses args, loop-*
955 (let ((word (cl-pop args))
956 (hash-types '(hash-key hash-keys hash-value hash-values))
957 (key-types '(key-code key-codes key-seq key-seqs
958 key-binding key-bindings)))
962 (error "Malformed `loop' macro"))
965 (setq loop-name (cl-pop args)))
967 ((eq word 'initially)
968 (if (memq (car args) '(do doing)) (cl-pop args))
969 (or (consp (car args)) (error "Syntax error on `initially' clause"))
970 (while (consp (car args))
971 (cl-push (cl-pop args) loop-initially)))
974 (if (eq (car args) 'return)
975 (setq loop-result-explicit (or (cl-pop2 args) '(quote nil)))
976 (if (memq (car args) '(do doing)) (cl-pop args))
977 (or (consp (car args)) (error "Syntax error on `finally' clause"))
978 (if (and (eq (caar args) 'return) (null loop-name))
979 (setq loop-result-explicit (or (nth 1 (cl-pop args)) '(quote nil)))
980 (while (consp (car args))
981 (cl-push (cl-pop args) loop-finally)))))
983 ((memq word '(for as))
984 (let ((loop-for-bindings nil) (loop-for-sets nil) (loop-for-steps nil)
987 (let ((var (or (cl-pop args) (gensym))))
988 (setq word (cl-pop args))
989 (if (eq word 'being) (setq word (cl-pop args)))
990 (if (memq word '(the each)) (setq word (cl-pop args)))
991 (if (memq word '(buffer buffers))
992 (setq word 'in args (cons '(buffer-list) args)))
995 ((memq word '(from downfrom upfrom to downto upto
998 (if (memq (car args) '(downto above))
999 (error "Must specify `from' value for downward loop"))
1000 (let* ((down (or (eq (car args) 'downfrom)
1001 (memq (caddr args) '(downto above))))
1002 (excl (or (memq (car args) '(above below))
1003 (memq (caddr args) '(above below))))
1004 (start (and (memq (car args) '(from upfrom downfrom))
1006 (end (and (memq (car args)
1007 '(to upto downto above below))
1009 (step (and (eq (car args) 'by) (cl-pop2 args)))
1010 (end-var (and (not (cl-const-expr-p end)) (gensym)))
1011 (step-var (and (not (cl-const-expr-p step))
1013 (and step (numberp step) (<= step 0)
1014 (error "Loop `by' value is not positive: %s" step))
1015 (cl-push (list var (or start 0)) loop-for-bindings)
1016 (if end-var (cl-push (list end-var end) loop-for-bindings))
1017 (if step-var (cl-push (list step-var step)
1021 (if down (if excl '> '>=) (if excl '< '<=))
1022 var (or end-var end)) loop-body))
1023 (cl-push (list var (list (if down '- '+) var
1024 (or step-var step 1)))
1027 ((memq word '(in in-ref on))
1028 (let* ((on (eq word 'on))
1029 (temp (if (and on (symbolp var)) var (gensym))))
1030 (cl-push (list temp (cl-pop args)) loop-for-bindings)
1031 (cl-push (list 'consp temp) loop-body)
1032 (if (eq word 'in-ref)
1033 (cl-push (list var (list 'car temp)) loop-symbol-macs)
1036 (cl-push (list var nil) loop-for-bindings)
1037 (cl-push (list var (if on temp (list 'car temp)))
1040 (if (eq (car args) 'by)
1041 (let ((step (cl-pop2 args)))
1042 (if (and (memq (car-safe step)
1045 (symbolp (nth 1 step)))
1046 (list (nth 1 step) temp)
1047 (list 'funcall step temp)))
1052 (let* ((start (cl-pop args))
1053 (then (if (eq (car args) 'then) (cl-pop2 args) start)))
1054 (cl-push (list var nil) loop-for-bindings)
1055 (if (or ands (eq (car args) 'and))
1060 (setq loop-first-flag
1064 (cl-push (list var then) loop-for-steps))
1066 (if (eq start then) start
1069 (setq loop-first-flag (gensym)))
1073 ((memq word '(across across-ref))
1074 (let ((temp-vec (gensym)) (temp-idx (gensym)))
1075 (cl-push (list temp-vec (cl-pop args)) loop-for-bindings)
1076 (cl-push (list temp-idx -1) loop-for-bindings)
1077 (cl-push (list '< (list 'setq temp-idx (list '1+ temp-idx))
1078 (list 'length temp-vec)) loop-body)
1079 (if (eq word 'across-ref)
1080 (cl-push (list var (list 'aref temp-vec temp-idx))
1082 (cl-push (list var nil) loop-for-bindings)
1083 (cl-push (list var (list 'aref temp-vec temp-idx))
1086 ((memq word '(element elements))
1087 (let ((ref (or (memq (car args) '(in-ref of-ref))
1088 (and (not (memq (car args) '(in of)))
1089 (error "Expected `of'"))))
1090 (seq (cl-pop2 args))
1092 (temp-idx (if (eq (car args) 'using)
1093 (if (and (= (length (cadr args)) 2)
1094 (eq (caadr args) 'index))
1095 (cadr (cl-pop2 args))
1096 (error "Bad `using' clause"))
1098 (cl-push (list temp-seq seq) loop-for-bindings)
1099 (cl-push (list temp-idx 0) loop-for-bindings)
1101 (let ((temp-len (gensym)))
1102 (cl-push (list temp-len (list 'length temp-seq))
1104 (cl-push (list var (list 'elt temp-seq temp-idx))
1106 (cl-push (list '< temp-idx temp-len) loop-body))
1107 (cl-push (list var nil) loop-for-bindings)
1108 (cl-push (list 'and temp-seq
1109 (list 'or (list 'consp temp-seq)
1111 (list 'length temp-seq))))
1113 (cl-push (list var (list 'if (list 'consp temp-seq)
1114 (list 'pop temp-seq)
1115 (list 'aref temp-seq temp-idx)))
1117 (cl-push (list temp-idx (list '1+ temp-idx))
1120 ((memq word hash-types)
1121 (or (memq (car args) '(in of)) (error "Expected `of'"))
1122 (let* ((table (cl-pop2 args))
1123 (other (if (eq (car args) 'using)
1124 (if (and (= (length (cadr args)) 2)
1125 (memq (caadr args) hash-types)
1126 (not (eq (caadr args) word)))
1127 (cadr (cl-pop2 args))
1128 (error "Bad `using' clause"))
1130 (if (memq word '(hash-value hash-values))
1131 (setq var (prog1 other (setq other var))))
1133 (list 'maphash (list 'function
1134 (list* 'lambda (list var other)
1135 '--cl-map)) table))))
1137 ((memq word '(symbol present-symbol external-symbol
1138 symbols present-symbols external-symbols))
1139 (let ((ob (and (memq (car args) '(in of)) (cl-pop2 args))))
1141 (list 'mapatoms (list 'function
1142 (list* 'lambda (list var)
1145 ((memq word '(overlay overlays extent extents))
1146 (let ((buf nil) (from nil) (to nil))
1147 (while (memq (car args) '(in of from to))
1148 (cond ((eq (car args) 'from) (setq from (cl-pop2 args)))
1149 ((eq (car args) 'to) (setq to (cl-pop2 args)))
1150 (t (setq buf (cl-pop2 args)))))
1152 (list 'cl-map-extents
1153 (list 'function (list 'lambda (list var (gensym))
1154 '(progn . --cl-map) nil))
1157 ((memq word '(interval intervals))
1158 (let ((buf nil) (prop nil) (from nil) (to nil)
1159 (var1 (gensym)) (var2 (gensym)))
1160 (while (memq (car args) '(in of property from to))
1161 (cond ((eq (car args) 'from) (setq from (cl-pop2 args)))
1162 ((eq (car args) 'to) (setq to (cl-pop2 args)))
1163 ((eq (car args) 'property)
1164 (setq prop (cl-pop2 args)))
1165 (t (setq buf (cl-pop2 args)))))
1166 (if (and (consp var) (symbolp (car var)) (symbolp (cdr var)))
1167 (setq var1 (car var) var2 (cdr var))
1168 (cl-push (list var (list 'cons var1 var2)) loop-for-sets))
1170 (list 'cl-map-intervals
1171 (list 'function (list 'lambda (list var1 var2)
1172 '(progn . --cl-map)))
1173 buf prop from to))))
1175 ((memq word key-types)
1176 (or (memq (car args) '(in of)) (error "Expected `of'"))
1177 (let* ((map (cl-pop2 args))
1179 (other (if (eq (car args) 'using)
1180 (if (and (= (length (cadr args)) 2)
1181 (memq (setq other-word (caadr args))
1183 (not (eq (caadr args) word)))
1184 (cadr (cl-pop2 args))
1185 (error "Bad `using' clause"))
1187 (when (memq word '(key-binding key-bindings))
1188 (setq var (prog1 other (setq other var)))
1189 (and other-word (setq word other-word)))
1191 (list (if (memq word '(key-seq key-seqs))
1192 'cl-map-keymap-recursively 'cl-map-keymap)
1193 (list 'function (list* 'lambda (list var other)
1196 ((memq word '(frame frames screen screens))
1197 (let ((temp (gensym)))
1198 (cl-push (list var '(selected-frame))
1200 (cl-push (list temp nil) loop-for-bindings)
1201 (cl-push (list 'prog1 (list 'not (list 'eq var temp))
1202 (list 'or temp (list 'setq temp var)))
1204 (cl-push (list var (list 'next-frame var))
1207 ((memq word '(window windows))
1208 (let ((scr (and (memq (car args) '(in of)) (cl-pop2 args)))
1210 (cl-push (list var (if scr
1211 (list 'frame-selected-window scr)
1212 '(selected-window)))
1214 (cl-push (list temp nil) loop-for-bindings)
1215 (cl-push (list 'prog1 (list 'not (list 'eq var temp))
1216 (list 'or temp (list 'setq temp var)))
1218 (cl-push (list var (list 'next-window var)) loop-for-steps)))
1221 (let ((handler (and (symbolp word)
1222 (get word 'cl-loop-for-handler))))
1224 (funcall handler var)
1225 (error "Expected a `for' preposition, found %s" word)))))
1226 (eq (car args) 'and))
1229 (if (and ands loop-for-bindings)
1230 (cl-push (nreverse loop-for-bindings) loop-bindings)
1231 (setq loop-bindings (nconc (mapcar 'list loop-for-bindings)
1234 (cl-push (list 'progn
1235 (cl-loop-let (nreverse loop-for-sets) 'setq ands)
1238 (cl-push (cons (if ands 'psetq 'setq)
1239 (apply 'append (nreverse loop-for-steps)))
1243 (let ((temp (gensym)))
1244 (cl-push (list (list temp (cl-pop args))) loop-bindings)
1245 (cl-push (list '>= (list 'setq temp (list '1- temp)) 0) loop-body)))
1248 (let ((what (cl-pop args))
1249 (var (cl-loop-handle-accum nil 'nreverse)))
1250 (if (eq var loop-accum-var)
1251 (cl-push (list 'progn (list 'push what var) t) loop-body)
1252 (cl-push (list 'progn
1253 (list 'setq var (list 'nconc var (list 'list what)))
1256 ((memq word '(nconc nconcing append appending))
1257 (let ((what (cl-pop args))
1258 (var (cl-loop-handle-accum nil 'nreverse)))
1259 (cl-push (list 'progn
1261 (if (eq var loop-accum-var)
1263 (list (if (memq word '(nconc nconcing))
1267 (list (if (memq word '(nconc nconcing))
1269 var what))) t) loop-body)))
1271 ((memq word '(concat concating))
1272 (let ((what (cl-pop args))
1273 (var (cl-loop-handle-accum "")))
1274 (cl-push (list 'progn (list 'callf 'concat var what) t) loop-body)))
1276 ((memq word '(vconcat vconcating))
1277 (let ((what (cl-pop args))
1278 (var (cl-loop-handle-accum [])))
1279 (cl-push (list 'progn (list 'callf 'vconcat var what) t) loop-body)))
1281 ((memq word '(bvconcat bvconcating))
1282 (let ((what (cl-pop args))
1283 (var (cl-loop-handle-accum #*)))
1284 (cl-push (list 'progn (list 'callf 'bvconcat var what) t) loop-body)))
1286 ((memq word '(sum summing))
1287 (let ((what (cl-pop args))
1288 (var (cl-loop-handle-accum 0)))
1289 (cl-push (list 'progn (list 'incf var what) t) loop-body)))
1291 ((memq word '(count counting))
1292 (let ((what (cl-pop args))
1293 (var (cl-loop-handle-accum 0)))
1294 (cl-push (list 'progn (list 'if what (list 'incf var)) t) loop-body)))
1296 ((memq word '(minimize minimizing maximize maximizing))
1297 (let* ((what (cl-pop args))
1298 (temp (if (cl-simple-expr-p what) what (gensym)))
1299 (var (cl-loop-handle-accum nil))
1300 (func (intern (substring (symbol-name word) 0 3)))
1301 (set (list 'setq var (list 'if var (list func var temp) temp))))
1302 (cl-push (list 'progn (if (eq temp what) set
1303 (list 'let (list (list temp what)) set))
1307 (let ((bindings nil))
1308 (while (progn (cl-push (list (cl-pop args)
1309 (and (eq (car args) '=) (cl-pop2 args)))
1311 (eq (car args) 'and))
1313 (cl-push (nreverse bindings) loop-bindings)))
1316 (cl-push (cl-pop args) loop-body))
1319 (cl-push (list 'not (cl-pop args)) loop-body))
1322 (or loop-finish-flag (setq loop-finish-flag (gensym)))
1323 (cl-push (list 'setq loop-finish-flag (cl-pop args)) loop-body)
1324 (setq loop-result t))
1327 (or loop-finish-flag (setq loop-finish-flag (gensym)))
1328 (cl-push (list 'setq loop-finish-flag (list 'not (cl-pop args)))
1330 (setq loop-result t))
1333 (or loop-finish-flag (setq loop-finish-flag (gensym)))
1334 (or loop-result-var (setq loop-result-var (gensym)))
1335 (cl-push (list 'setq loop-finish-flag
1336 (list 'not (list 'setq loop-result-var (cl-pop args))))
1339 ((memq word '(if when unless))
1340 (let* ((cond (cl-pop args))
1341 (then (let ((loop-body nil))
1342 (cl-parse-loop-clause)
1343 (cl-loop-build-ands (nreverse loop-body))))
1344 (else (let ((loop-body nil))
1345 (if (eq (car args) 'else)
1346 (progn (cl-pop args) (cl-parse-loop-clause)))
1347 (cl-loop-build-ands (nreverse loop-body))))
1348 (simple (and (eq (car then) t) (eq (car else) t))))
1349 (if (eq (car args) 'end) (cl-pop args))
1350 (if (eq word 'unless) (setq then (prog1 else (setq else then))))
1351 (let ((form (cons (if simple (cons 'progn (nth 1 then)) (nth 2 then))
1352 (if simple (nth 1 else) (list (nth 2 else))))))
1353 (if (cl-expr-contains form 'it)
1354 (let ((temp (gensym)))
1355 (cl-push (list temp) loop-bindings)
1356 (setq form (list* 'if (list 'setq temp cond)
1357 (subst temp 'it form))))
1358 (setq form (list* 'if cond form)))
1359 (cl-push (if simple (list 'progn form t) form) loop-body))))
1361 ((memq word '(do doing))
1363 (or (consp (car args)) (error "Syntax error on `do' clause"))
1364 (while (consp (car args)) (cl-push (cl-pop args) body))
1365 (cl-push (cons 'progn (nreverse (cons t body))) loop-body)))
1368 (or loop-finish-flag (setq loop-finish-flag (gensym)))
1369 (or loop-result-var (setq loop-result-var (gensym)))
1370 (cl-push (list 'setq loop-result-var (cl-pop args)
1371 loop-finish-flag nil) loop-body))
1374 (let ((handler (and (symbolp word) (get word 'cl-loop-handler))))
1375 (or handler (error "Expected a loop keyword, found %s" word))
1376 (funcall handler))))
1377 (if (eq (car args) 'and)
1378 (progn (cl-pop args) (cl-parse-loop-clause)))))
1380 (defun cl-loop-let (specs body par) ; uses loop-*
1381 (let ((p specs) (temps nil) (new nil))
1382 (while (and p (or (symbolp (car-safe (car p))) (null (cadar p))))
1386 (setq par nil p specs)
1388 (or (cl-const-expr-p (cadar p))
1389 (let ((temp (gensym)))
1390 (cl-push (list temp (cadar p)) temps)
1391 (setcar (cdar p) temp)))
1394 (if (and (consp (car specs)) (listp (caar specs)))
1395 (let* ((spec (caar specs)) (nspecs nil)
1396 (expr (cadr (cl-pop specs)))
1397 (temp (cdr (or (assq spec loop-destr-temps)
1398 (car (cl-push (cons spec (or (last spec 0)
1400 loop-destr-temps))))))
1401 (cl-push (list temp expr) new)
1403 (cl-push (list (cl-pop spec)
1404 (and expr (list (if spec 'pop 'car) temp)))
1406 (setq specs (nconc (nreverse nspecs) specs)))
1407 (cl-push (cl-pop specs) new)))
1409 (let ((set (cons (if par 'psetq 'setq) (apply 'nconc (nreverse new)))))
1410 (if temps (list 'let* (nreverse temps) set) set))
1411 (list* (if par 'let 'let*)
1412 (nconc (nreverse temps) (nreverse new)) body))))
1414 (defun cl-loop-handle-accum (def &optional func) ; uses args, loop-*
1415 (if (eq (car args) 'into)
1416 (let ((var (cl-pop2 args)))
1417 (or (memq var loop-accum-vars)
1418 (progn (cl-push (list (list var def)) loop-bindings)
1419 (cl-push var loop-accum-vars)))
1423 (cl-push (list (list (setq loop-accum-var (gensym)) def))
1425 (setq loop-result (if func (list func loop-accum-var)
1429 (defun cl-loop-build-ands (clauses)
1433 (if (and (eq (car-safe (car clauses)) 'progn)
1434 (eq (car (last (car clauses))) t))
1436 (setq clauses (cons (nconc (butlast (car clauses))
1437 (if (eq (car-safe (cadr clauses))
1440 (list (cadr clauses))))
1442 (setq body (cdr (butlast (cl-pop clauses)))))
1443 (cl-push (cl-pop clauses) ands)))
1444 (setq ands (or (nreverse ands) (list t)))
1445 (list (if (cdr ands) (cons 'and ands) (car ands))
1447 (let ((full (if body
1448 (append ands (list (cons 'progn (append body '(t)))))
1450 (if (cdr full) (cons 'and full) (car full))))))
1453 ;;; Other iteration control structures.
1456 (defmacro do (steps endtest &rest body)
1457 "The Common Lisp `do' loop.
1458 Format is: (do ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
1459 (cl-expand-do-loop steps endtest body nil))
1462 (defmacro do* (steps endtest &rest body)
1463 "The Common Lisp `do*' loop.
1464 Format is: (do* ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
1465 (cl-expand-do-loop steps endtest body t))
1467 (defun cl-expand-do-loop (steps endtest body star)
1469 (list* (if star 'let* 'let)
1470 (mapcar #'(lambda (c) (if (consp c) (list (car c) (nth 1 c)) c))
1472 (list* 'while (list 'not (car endtest))
1476 (and (consp c) (cdr (cdr c))
1477 (list (car c) (nth 2 c))))
1479 (setq sets (delq nil sets))
1481 (list (cons (if (or star (not (cdr sets)))
1483 (apply 'append sets)))))))
1484 (or (cdr endtest) '(nil)))))
1487 (defmacro dolist (spec &rest body)
1488 "(dolist (VAR LIST [RESULT]) BODY...): loop over a list.
1489 Evaluate BODY with VAR bound to each `car' from LIST, in turn.
1490 Then evaluate RESULT to get return value, default nil."
1491 (let ((temp (gensym "--dolist-temp--")))
1493 (list* 'let (list (list temp (nth 1 spec)) (car spec))
1494 (list* 'while temp (list 'setq (car spec) (list 'car temp))
1495 (append body (list (list 'setq temp
1496 (list 'cdr temp)))))
1497 (if (cdr (cdr spec))
1498 (cons (list 'setq (car spec) nil) (cdr (cdr spec)))
1502 (defmacro dotimes (spec &rest body)
1503 "(dotimes (VAR COUNT [RESULT]) BODY...): loop a certain number of times.
1504 Evaluate BODY with VAR bound to successive integers from 0, inclusive,
1505 to COUNT, exclusive. Then evaluate RESULT to get return value, default
1507 (let ((temp (gensym "--dotimes-temp--")))
1509 (list* 'let (list (list temp (nth 1 spec)) (list (car spec) 0))
1510 (list* 'while (list '< (car spec) temp)
1511 (append body (list (list 'incf (car spec)))))
1512 (or (cdr (cdr spec)) '(nil))))))
1515 (defmacro do-symbols (spec &rest body)
1516 "(dosymbols (VAR [OBARRAY [RESULT]]) BODY...): loop over all symbols.
1517 Evaluate BODY with VAR bound to each interned symbol, or to each symbol
1519 ;; Apparently this doesn't have an implicit block.
1521 (list 'let (list (car spec))
1523 (list 'function (list* 'lambda (list (car spec)) body))
1524 (and (cadr spec) (list (cadr spec))))
1528 (defmacro do-all-symbols (spec &rest body)
1529 (list* 'do-symbols (list (car spec) nil (cadr spec)) body))
1535 (defmacro psetq (&rest args)
1536 "(psetq SYM VAL SYM VAL ...): set SYMs to the values VALs in parallel.
1537 This is like `setq', except that all VAL forms are evaluated (in order)
1538 before assigning any symbols SYM to the corresponding values."
1542 ;;; Binding control structures.
1545 (defmacro progv (symbols values &rest body)
1546 "(progv SYMBOLS VALUES BODY...): bind SYMBOLS to VALUES dynamically in BODY.
1547 The forms SYMBOLS and VALUES are evaluated, and must evaluate to lists.
1548 Each SYMBOL in the first list is bound to the corresponding VALUE in the
1549 second list (or made unbound if VALUES is shorter than SYMBOLS); then the
1550 BODY forms are executed and their result is returned. This is much like
1551 a `let' form, except that the list of symbols can be computed at run-time."
1552 (list 'let '((cl-progv-save nil))
1553 (list 'unwind-protect
1554 (list* 'progn (list 'cl-progv-before symbols values) body)
1555 '(cl-progv-after))))
1557 ;;; This should really have some way to shadow 'byte-compile properties, etc.
1559 (defmacro flet (bindings &rest body)
1560 "(flet ((FUNC ARGLIST BODY...) ...) FORM...): make temporary function defns.
1561 This is an analogue of `let' that operates on the function cell of FUNC
1562 rather than its value cell. The FORMs are evaluated with the specified
1563 function definitions in place, then the definitions are undone (the FUNCs
1564 go back to their previous definitions, or lack thereof)."
1568 (if (or (and (fboundp (car x))
1569 (eq (car-safe (symbol-function (car x))) 'macro))
1570 (cdr (assq (car x) cl-macro-environment)))
1571 (error "Use `labels', not `flet', to rebind macro names"))
1572 (let ((func (list 'function*
1573 (list 'lambda (cadr x)
1574 (list* 'block (car x) (cddr x))))))
1575 (if (and (cl-compiling-file)
1576 (boundp 'byte-compile-function-environment))
1577 (cl-push (cons (car x) (eval func))
1578 byte-compile-function-environment))
1579 (list (list 'symbol-function (list 'quote (car x))) func)))
1584 (defmacro labels (bindings &rest body)
1585 "(labels ((FUNC ARGLIST BODY...) ...) FORM...): make temporary func bindings.
1586 This is like `flet', except the bindings are lexical instead of dynamic.
1587 Unlike `flet', this macro is fully compliant with the Common Lisp standard."
1588 (let ((vars nil) (sets nil) (cl-macro-environment cl-macro-environment))
1590 (let ((var (gensym)))
1592 (cl-push (list 'function* (cons 'lambda (cdar bindings))) sets)
1594 (cl-push (list (car (cl-pop bindings)) 'lambda '(&rest cl-labels-args)
1595 (list 'list* '(quote funcall) (list 'quote var)
1597 cl-macro-environment)))
1598 (cl-macroexpand-all (list* 'lexical-let vars (cons (cons 'setq sets) body))
1599 cl-macro-environment)))
1601 ;; The following ought to have a better definition for use with newer
1604 (defmacro macrolet (bindings &rest body)
1605 "(macrolet ((NAME ARGLIST BODY...) ...) FORM...): make temporary macro defns.
1606 This is like `flet', but for macros instead of functions."
1609 (list (car bindings)) (list* 'macrolet (cdr bindings) body))
1610 (if (null bindings) (cons 'progn body)
1611 (let* ((name (caar bindings))
1612 (res (cl-transform-lambda (cdar bindings) name)))
1614 (cl-macroexpand-all (cons 'progn body)
1615 (cons (list* name 'lambda (cdr res))
1616 cl-macro-environment))))))
1619 (defmacro symbol-macrolet (bindings &rest body)
1620 "(symbol-macrolet ((NAME EXPANSION) ...) FORM...): make symbol macro defns.
1621 Within the body FORMs, references to the variable NAME will be replaced
1622 by EXPANSION, and (setq NAME ...) will act like (setf EXPANSION ...)."
1624 (list 'symbol-macrolet
1625 (list (car bindings)) (list* 'symbol-macrolet (cdr bindings) body))
1626 (if (null bindings) (cons 'progn body)
1627 (cl-macroexpand-all (cons 'progn body)
1628 (cons (list (symbol-name (caar bindings))
1630 cl-macro-environment)))))
1633 (defmacro define-symbol-macro (symbol expansion)
1634 "Provides a mechanism for globally affecting the macro expansion of
1635 the indicated SYMBOL. Any time SYMBOL is referenced, the EXPANSION
1636 is actually used in place of SYMBOL.
1637 Any use of setq to set the value of the symbol while in the scope of this
1638 definition is treated as if it were a setf.
1639 A binding for a symbol macro can be shadowed by `let' or `symbol-macrolet'."
1640 (cond ((not (symbolp symbol))
1641 (error "define-symbol-macro: %S is not a symbol"
1645 (put ',symbol 'symbol-macro ',expansion)
1648 (defvar cl-closure-vars nil)
1650 (defmacro lexical-let (bindings &rest body)
1651 "(lexical-let BINDINGS BODY...): like `let', but lexically scoped.
1652 The main visible difference is that lambdas inside BODY will create
1653 lexical closures as in Common Lisp."
1654 (let* ((cl-closure-vars cl-closure-vars)
1655 (vars (mapcar #'(lambda (x)
1656 (or (consp x) (setq x (list x)))
1657 (cl-push (gensym (format "--%s--" (car x)))
1659 (list (car x) (cadr x) (car cl-closure-vars)))
1664 (nconc (mapcar #'(lambda (x)
1665 (list (symbol-name (car x))
1666 (list 'symbol-value (caddr x))
1669 (list '(defun . cl-defun-expander))
1670 cl-macro-environment))))
1671 (if (not (get (car (last cl-closure-vars)) 'used))
1672 (list 'let (mapcar #'(lambda (x) (list (caddr x) (cadr x))) vars)
1673 (sublis (mapcar #'(lambda (x)
1674 (cons (caddr x) (list 'quote (caddr x))))
1677 (list 'let (mapcar #'(lambda (x)
1680 (format "--%s--" (car x)))))
1682 (apply 'append '(setf)
1683 (mapcar #'(lambda (x)
1684 (list (list 'symbol-value (caddr x)) (cadr x)))
1689 (defmacro lexical-let* (bindings &rest body)
1690 "(lexical-let* BINDINGS BODY...): like `let*', but lexically scoped.
1691 The main visible difference is that lambdas inside BODY will create
1692 lexical closures as in Common Lisp."
1693 (if (null bindings) (cons 'progn body)
1694 (setq bindings (reverse bindings))
1696 (setq body (list (list* 'lexical-let (list (cl-pop bindings)) body))))
1699 (defun cl-defun-expander (func &rest rest)
1701 (list 'defalias (list 'quote func)
1702 (list 'function (cons 'lambda rest)))
1703 (list 'quote func)))
1706 ;;; Multiple values.
1709 (defmacro multiple-value-bind (vars form &rest body)
1710 "(multiple-value-bind (SYM SYM...) FORM BODY): collect multiple return values.
1711 FORM must return a list; the BODY is then executed with the first N elements
1712 of this list bound (`let'-style) to each of the symbols SYM in turn. This
1713 is analogous to the Common Lisp `multiple-value-bind' macro, using lists to
1714 simulate true multiple return values. For compatibility, (values A B C) is
1715 a synonym for (list A B C)."
1716 (let ((temp (gensym)) (n -1))
1717 (list* 'let* (cons (list temp form)
1718 (mapcar #'(lambda (v)
1719 (list v (list 'nth (setq n (1+ n)) temp)))
1724 (defmacro multiple-value-setq (vars form)
1725 "(multiple-value-setq (SYM SYM...) FORM): collect multiple return values.
1726 FORM must return a list; the first N elements of this list are stored in
1727 each of the symbols SYM in turn. This is analogous to the Common Lisp
1728 `multiple-value-setq' macro, using lists to simulate true multiple return
1729 values. For compatibility, (values A B C) is a synonym for (list A B C)."
1730 (cond ((null vars) (list 'progn form nil))
1731 ((null (cdr vars)) (list 'setq (car vars) (list 'car form)))
1733 (let* ((temp (gensym)) (n 0))
1734 (list 'let (list (list temp form))
1735 (list 'prog1 (list 'setq (cl-pop vars) (list 'car temp))
1750 (defmacro locally (&rest body) (cons 'progn body))
1752 (defmacro the (type form) form)
1754 (defvar cl-proclaim-history t) ; for future compilers
1755 (defvar cl-declare-stack t) ; for future compilers
1757 (defun cl-do-proclaim (spec hist)
1758 (and hist (listp cl-proclaim-history) (cl-push spec cl-proclaim-history))
1759 (cond ((eq (car-safe spec) 'special)
1760 (if (boundp 'byte-compile-bound-variables)
1761 (setq byte-compile-bound-variables
1763 (mapcar #'(lambda (v) (cons v byte-compile-global-bit))
1765 byte-compile-bound-variables))))
1767 ((eq (car-safe spec) 'inline)
1768 (while (setq spec (cdr spec))
1769 (or (memq (get (car spec) 'byte-optimizer)
1770 '(nil byte-compile-inline-expand))
1771 (error "%s already has a byte-optimizer, can't make it inline"
1773 (put (car spec) 'byte-optimizer 'byte-compile-inline-expand)))
1775 ((eq (car-safe spec) 'notinline)
1776 (while (setq spec (cdr spec))
1777 (if (eq (get (car spec) 'byte-optimizer)
1778 'byte-compile-inline-expand)
1779 (put (car spec) 'byte-optimizer nil))))
1781 ((eq (car-safe spec) 'optimize)
1782 (let ((speed (assq (nth 1 (assq 'speed (cdr spec)))
1783 '((0 . nil) (1 . t) (2 . t) (3 . t))))
1784 (safety (assq (nth 1 (assq 'safety (cdr spec)))
1785 '((0 . t) (1 . t) (2 . t) (3 . nil)))))
1787 (setq cl-optimize-speed (car speed)
1788 byte-optimize (cdr speed)))
1790 (setq cl-optimize-safety (car safety)
1791 byte-compile-delete-errors (cdr safety)))))
1793 ((and (eq (car-safe spec) 'warn) (boundp 'byte-compile-warnings))
1794 (if (eq byte-compile-warnings t)
1796 (setq byte-compile-warnings byte-compile-default-warnings))
1797 (while (setq spec (cdr spec))
1798 (if (consp (car spec))
1799 (if (eq (cadar spec) 0)
1800 (setq byte-compile-warnings
1801 (delq (caar spec) byte-compile-warnings))
1802 (setq byte-compile-warnings
1803 (adjoin (caar spec) byte-compile-warnings)))))))
1806 ;;; Process any proclamations made before cl-macs was loaded.
1807 (defvar cl-proclaims-deferred)
1808 (let ((p (reverse cl-proclaims-deferred)))
1809 (while p (cl-do-proclaim (cl-pop p) t))
1810 (setq cl-proclaims-deferred nil))
1813 (defmacro declare (&rest specs)
1814 (if (cl-compiling-file)
1816 (if (listp cl-declare-stack) (cl-push (car specs) cl-declare-stack))
1817 (cl-do-proclaim (cl-pop specs) nil)))
1822 ;;; Generalized variables.
1825 (defmacro define-setf-method (func args &rest body)
1826 "(define-setf-method NAME ARGLIST BODY...): define a `setf' method.
1827 This method shows how to handle `setf's to places of the form (NAME ARGS...).
1828 The argument forms ARGS are bound according to ARGLIST, as if NAME were
1829 going to be expanded as a macro, then the BODY forms are executed and must
1830 return a list of five elements: a temporary-variables list, a value-forms
1831 list, a store-variables list (of length one), a store-form, and an access-
1832 form. See `defsetf' for a simpler way to define most setf-methods."
1833 (append '(eval-when (compile load eval))
1834 (if (stringp (car body))
1835 (list (list 'put (list 'quote func) '(quote setf-documentation)
1837 (list (cl-transform-function-property
1838 func 'setf-method (cons args body)))))
1841 (defmacro defsetf (func arg1 &rest args)
1842 "(defsetf NAME FUNC): define a `setf' method.
1843 This macro is an easy-to-use substitute for `define-setf-method' that works
1844 well for simple place forms. In the simple `defsetf' form, `setf's of
1845 the form (setf (NAME ARGS...) VAL) are transformed to function or macro
1846 calls of the form (FUNC ARGS... VAL). Example: (defsetf aref aset).
1847 Alternate form: (defsetf NAME ARGLIST (STORE) BODY...).
1848 Here, the above `setf' call is expanded by binding the argument forms ARGS
1849 according to ARGLIST, binding the value form VAL to STORE, then executing
1850 BODY, which must return a Lisp form that does the necessary `setf' operation.
1851 Actually, ARGLIST and STORE may be bound to temporary variables which are
1852 introduced automatically to preserve proper execution order of the arguments.
1853 Example: (defsetf nth (n x) (v) (list 'setcar (list 'nthcdr n x) v))."
1855 (let* ((largs nil) (largsr nil)
1856 (temps nil) (tempsr nil)
1857 (restarg nil) (rest-temps nil)
1858 (store-var (car (prog1 (car args) (setq args (cdr args)))))
1859 (store-temp (intern (format "--%s--temp--" store-var)))
1860 (lets1 nil) (lets2 nil)
1861 (docstr nil) (p arg1))
1862 (if (stringp (car args))
1863 (setq docstr (prog1 (car args) (setq args (cdr args)))))
1864 (while (and p (not (eq (car p) '&aux)))
1865 (if (eq (car p) '&rest)
1866 (setq p (cdr p) restarg (car p))
1867 (or (memq (car p) '(&optional &key &allow-other-keys))
1868 (setq largs (cons (if (consp (car p)) (car (car p)) (car p))
1870 temps (cons (intern (format "--%s--temp--" (car largs)))
1873 (setq largs (nreverse largs) temps (nreverse temps))
1875 (setq largsr (append largs (list restarg))
1876 rest-temps (intern (format "--%s--temp--" restarg))
1877 tempsr (append temps (list rest-temps)))
1878 (setq largsr largs tempsr temps))
1879 (let ((p1 largs) (p2 temps))
1881 (setq lets1 (cons (list (car p2)
1882 (list 'gensym (format "--%s--" (car p1))))
1884 lets2 (cons (list (car p1) (car p2)) lets2)
1885 p1 (cdr p1) p2 (cdr p2))))
1886 (if restarg (setq lets2 (cons (list restarg rest-temps) lets2)))
1887 (append (list 'define-setf-method func arg1)
1888 (and docstr (list docstr))
1892 (cons (list store-temp
1893 (list 'gensym (format "--%s--" store-var)))
1898 (list 'mapcar '(quote gensym)
1902 (list 'list ; 'values
1903 (cons (if restarg 'list* 'list) tempsr)
1904 (cons (if restarg 'list* 'list) largsr)
1905 (list 'list store-temp)
1908 (cons (list store-var store-temp)
1911 (cons (if restarg 'list* 'list)
1912 (cons (list 'quote func) tempsr)))))))
1913 (list 'defsetf func '(&rest args) '(store)
1914 (let ((call (list 'cons (list 'quote arg1)
1915 '(append args (list store)))))
1917 (list 'list '(quote progn) call 'store)
1920 ;;; Some standard place types from Common Lisp.
1921 (eval-when-compile (defvar ignored-arg)) ; Warning suppression
1923 (defsetf car setcar)
1924 (defsetf cdr setcdr)
1925 (defsetf elt (seq n) (store)
1926 (list 'if (list 'listp seq) (list 'setcar (list 'nthcdr n seq) store)
1927 (list 'aset seq n store)))
1928 (defsetf get (x y &optional ignored-arg) (store) (list 'put x y store))
1929 (defsetf get* (x y &optional ignored-arg) (store) (list 'put x y store))
1930 (defsetf gethash (x h &optional ignored-arg) (store) (list 'cl-puthash x store h))
1931 (defsetf nth (n x) (store) (list 'setcar (list 'nthcdr n x) store))
1932 (defsetf subseq (seq start &optional end) (new)
1933 (list 'progn (list 'replace seq new ':start1 start ':end1 end) new))
1934 (defsetf symbol-function fset)
1935 (defsetf symbol-plist setplist)
1936 (defsetf symbol-value set)
1938 ;;; Various car/cdr aliases. Note that `cadr' is handled specially.
1939 (defsetf first setcar)
1940 (defsetf second (x) (store) (list 'setcar (list 'cdr x) store))
1941 (defsetf third (x) (store) (list 'setcar (list 'cddr x) store))
1942 (defsetf fourth (x) (store) (list 'setcar (list 'cdddr x) store))
1943 (defsetf fifth (x) (store) (list 'setcar (list 'nthcdr 4 x) store))
1944 (defsetf sixth (x) (store) (list 'setcar (list 'nthcdr 5 x) store))
1945 (defsetf seventh (x) (store) (list 'setcar (list 'nthcdr 6 x) store))
1946 (defsetf eighth (x) (store) (list 'setcar (list 'nthcdr 7 x) store))
1947 (defsetf ninth (x) (store) (list 'setcar (list 'nthcdr 8 x) store))
1948 (defsetf tenth (x) (store) (list 'setcar (list 'nthcdr 9 x) store))
1949 (defsetf rest setcdr)
1951 ;;; Some more Emacs-related place types.
1952 (defsetf buffer-file-name set-visited-file-name t)
1953 (defsetf buffer-modified-p set-buffer-modified-p t)
1954 (defsetf buffer-name rename-buffer t)
1955 (defsetf buffer-string () (store)
1956 (list 'progn '(erase-buffer) (list 'insert store)))
1957 (defsetf buffer-substring cl-set-buffer-substring)
1958 (defsetf current-buffer set-buffer)
1959 (defsetf current-case-table set-case-table)
1960 (defsetf current-column move-to-column t)
1961 (defsetf current-global-map use-global-map t)
1962 (defsetf current-input-mode () (store)
1963 (list 'progn (list 'apply 'set-input-mode store) store))
1964 (defsetf current-local-map use-local-map t)
1965 (defsetf current-window-configuration set-window-configuration t)
1966 (defsetf default-file-modes set-default-file-modes t)
1967 (defsetf default-value set-default)
1968 (defsetf documentation-property put)
1969 (defsetf extent-face set-extent-face)
1970 (defsetf extent-priority set-extent-priority)
1971 (defsetf extent-property (x y &optional ignored-arg) (arg)
1972 (list 'set-extent-property x y arg))
1973 (defsetf extent-start-position (ext) (store)
1974 `(progn (set-extent-endpoints ,ext ,store (extent-end-position ,ext))
1976 (defsetf extent-end-position (ext) (store)
1977 `(progn (set-extent-endpoints ,ext (extent-start-position ,ext) ,store)
1979 (defsetf face-background (f &optional s) (x) (list 'set-face-background f x s))
1980 (defsetf face-background-pixmap (f &optional s) (x)
1981 (list 'set-face-background-pixmap f x s))
1982 (defsetf face-font (f &optional s) (x) (list 'set-face-font f x s))
1983 (defsetf face-foreground (f &optional s) (x) (list 'set-face-foreground f x s))
1984 (defsetf face-underline-p (f &optional s) (x)
1985 (list 'set-face-underline-p f x s))
1986 (defsetf file-modes set-file-modes t)
1987 (defsetf frame-parameters modify-frame-parameters t)
1988 (defsetf frame-visible-p cl-set-frame-visible-p)
1989 (defsetf frame-properties (&optional f) (p)
1990 `(progn (set-frame-properties ,f ,p) ,p))
1991 (defsetf frame-property (f p &optional ignored-arg) (v)
1992 `(progn (set-frame-property ,f ,v) ,p))
1993 (defsetf frame-width (&optional f) (v)
1994 `(progn (set-frame-width ,f ,v) ,v))
1995 (defsetf frame-height (&optional f) (v)
1996 `(progn (set-frame-height ,f ,v) ,v))
1997 (defsetf current-frame-configuration set-frame-configuration)
1999 ;; XEmacs: new stuff
2001 (defsetf selected-console select-console t)
2002 (defsetf selected-device select-device t)
2003 (defsetf device-baud-rate (&optional d) (v)
2004 `(set-device-baud-rate ,d ,v))
2005 ;; This setf method is a bad idea, because set-specifier *adds* a
2006 ;; specification, rather than just setting it. The net effect is that
2007 ;; it makes specifier-instance return VAL, but other things don't work
2008 ;; as expected -- letf, to name one.
2009 ;(defsetf specifier-instance (spec &optional dom def nof) (val)
2010 ; `(set-specifier ,spec ,val ,dom))
2013 (defsetf annotation-glyph set-annotation-glyph)
2014 (defsetf annotation-down-glyph set-annotation-down-glyph)
2015 (defsetf annotation-face set-annotation-face)
2016 (defsetf annotation-layout set-annotation-layout)
2017 (defsetf annotation-data set-annotation-data)
2018 (defsetf annotation-action set-annotation-action)
2019 (defsetf annotation-menu set-annotation-menu)
2021 (defsetf widget-get widget-put t)
2022 (defsetf widget-value widget-value-set t)
2025 (defsetf recent-keys-ring-size set-recent-keys-ring-size)
2026 (defsetf symbol-value-in-buffer (s b &optional ignored-arg) (store)
2027 `(with-current-buffer ,b (set ,s ,store)))
2028 (defsetf symbol-value-in-console (s c &optional ignored-arg) (store)
2029 `(letf (((selected-console) ,c))
2032 (defsetf buffer-dedicated-frame (&optional b) (v)
2033 `(set-buffer-dedicated-frame ,b ,v))
2034 (defsetf console-type-image-conversion-list
2035 set-console-type-image-conversion-list)
2036 (defsetf default-toolbar-position set-default-toolbar-position)
2037 (defsetf device-class (&optional d) (v)
2038 `(set-device-class ,d ,v))
2039 (defsetf extent-begin-glyph set-extent-begin-glyph)
2040 (defsetf extent-begin-glyph-layout set-extent-begin-glyph-layout)
2041 (defsetf extent-end-glyph set-extent-end-glyph)
2042 (defsetf extent-end-glyph-layout set-extent-end-glyph-layout)
2043 (defsetf extent-keymap set-extent-keymap)
2044 (defsetf extent-parent set-extent-parent)
2045 (defsetf extent-properties set-extent-properties)
2046 ;; Avoid adding various face and glyph functions.
2047 (defsetf frame-selected-window (&optional f) (v)
2048 `(set-frame-selected-window ,f ,v))
2049 (defsetf glyph-image (glyph &optional domain) (i)
2050 (list 'set-glyph-image glyph i domain))
2051 (defsetf itimer-function set-itimer-function)
2052 (defsetf itimer-function-arguments set-itimer-function-arguments)
2053 (defsetf itimer-is-idle set-itimer-is-idle)
2054 (defsetf itimer-recorded-run-time set-itimer-recorded-run-time)
2055 (defsetf itimer-restart set-itimer-restart)
2056 (defsetf itimer-uses-arguments set-itimer-uses-arguments)
2057 (defsetf itimer-value set-itimer-value)
2058 (defsetf keymap-parents set-keymap-parents)
2059 (defsetf marker-insertion-type set-marker-insertion-type)
2060 (defsetf mouse-pixel-position (&optional d) (v)
2062 (set-mouse-pixel-position ,d ,(car v) ,(car (cdr v)) ,(cdr (cdr v)))
2064 (defsetf trunc-stack-length set-trunc-stack-length)
2065 (defsetf trunc-stack-stack set-trunc-stack-stack)
2066 (defsetf undoable-stack-max set-undoable-stack-max)
2067 (defsetf weak-list-list set-weak-list-list)
2070 (defsetf getenv setenv t)
2071 (defsetf get-register set-register)
2072 (defsetf global-key-binding global-set-key)
2073 (defsetf keymap-parent set-keymap-parent)
2074 (defsetf keymap-name set-keymap-name)
2075 (defsetf keymap-prompt set-keymap-prompt)
2076 (defsetf keymap-default-binding set-keymap-default-binding)
2077 (defsetf local-key-binding local-set-key)
2078 (defsetf mark set-mark t)
2079 (defsetf mark-marker set-mark t)
2080 (defsetf marker-position set-marker t)
2081 (defsetf match-data store-match-data t)
2082 (defsetf mouse-position (scr) (store)
2083 (list 'set-mouse-position scr (list 'car store) (list 'cadr store)
2084 (list 'cddr store)))
2085 (defsetf overlay-get overlay-put)
2086 (defsetf overlay-start (ov) (store)
2087 (list 'progn (list 'move-overlay ov store (list 'overlay-end ov)) store))
2088 (defsetf overlay-end (ov) (store)
2089 (list 'progn (list 'move-overlay ov (list 'overlay-start ov) store) store))
2090 (defsetf point goto-char)
2091 (defsetf point-marker goto-char t)
2092 (defsetf point-max () (store)
2093 (list 'progn (list 'narrow-to-region '(point-min) store) store))
2094 (defsetf point-min () (store)
2095 (list 'progn (list 'narrow-to-region store '(point-max)) store))
2096 (defsetf process-buffer set-process-buffer)
2097 (defsetf process-filter set-process-filter)
2098 (defsetf process-sentinel set-process-sentinel)
2099 (defsetf read-mouse-position (scr) (store)
2100 (list 'set-mouse-position scr (list 'car store) (list 'cdr store)))
2101 (defsetf selected-window select-window)
2102 (defsetf selected-frame select-frame)
2103 (defsetf standard-case-table set-standard-case-table)
2104 (defsetf syntax-table set-syntax-table)
2105 (defsetf visited-file-modtime set-visited-file-modtime t)
2106 (defsetf window-buffer set-window-buffer t)
2107 (defsetf window-display-table set-window-display-table t)
2108 (defsetf window-dedicated-p set-window-dedicated-p t)
2109 (defsetf window-height (&optional window) (store)
2110 `(progn (enlarge-window (- ,store (window-height)) nil ,window) ,store))
2111 (defsetf window-hscroll set-window-hscroll)
2112 (defsetf window-point set-window-point)
2113 (defsetf window-start set-window-start)
2114 (defsetf window-width (&optional window) (store)
2115 `(progn (enlarge-window (- ,store (window-width)) t ,window) ,store))
2116 (defsetf x-get-cutbuffer x-store-cutbuffer t)
2117 (defsetf x-get-cut-buffer x-store-cut-buffer t) ; groan.
2118 (defsetf x-get-secondary-selection x-own-secondary-selection t)
2119 (defsetf x-get-selection x-own-selection t)
2120 (defsetf get-selection own-selection t)
2122 ;;; More complex setf-methods.
2123 ;;; These should take &environment arguments, but since full arglists aren't
2124 ;;; available while compiling cl-macs, we fake it by referring to the global
2125 ;;; variable cl-macro-environment directly.
2127 (define-setf-method apply (func arg1 &rest rest)
2128 (or (and (memq (car-safe func) '(quote function function*))
2129 (symbolp (car-safe (cdr-safe func))))
2130 (error "First arg to apply in setf is not (function SYM): %s" func))
2131 (let* ((form (cons (nth 1 func) (cons arg1 rest)))
2132 (method (get-setf-method form cl-macro-environment)))
2133 (list (car method) (nth 1 method) (nth 2 method)
2134 (cl-setf-make-apply (nth 3 method) (cadr func) (car method))
2135 (cl-setf-make-apply (nth 4 method) (cadr func) (car method)))))
2137 (defun cl-setf-make-apply (form func temps)
2138 (if (eq (car form) 'progn)
2139 (list* 'progn (cl-setf-make-apply (cadr form) func temps) (cddr form))
2140 (or (equal (last form) (last temps))
2141 (error "%s is not suitable for use with setf-of-apply" func))
2142 (list* 'apply (list 'quote (car form)) (cdr form))))
2144 (define-setf-method nthcdr (n place)
2145 (let ((method (get-setf-method place cl-macro-environment))
2146 (n-temp (gensym "--nthcdr-n--"))
2147 (store-temp (gensym "--nthcdr-store--")))
2148 (list (cons n-temp (car method))
2149 (cons n (nth 1 method))
2151 (list 'let (list (list (car (nth 2 method))
2152 (list 'cl-set-nthcdr n-temp (nth 4 method)
2154 (nth 3 method) store-temp)
2155 (list 'nthcdr n-temp (nth 4 method)))))
2157 (define-setf-method getf (place tag &optional def)
2158 (let ((method (get-setf-method place cl-macro-environment))
2159 (tag-temp (gensym "--getf-tag--"))
2160 (def-temp (gensym "--getf-def--"))
2161 (store-temp (gensym "--getf-store--")))
2162 (list (append (car method) (list tag-temp def-temp))
2163 (append (nth 1 method) (list tag def))
2165 (list 'let (list (list (car (nth 2 method))
2166 (list 'cl-set-getf (nth 4 method)
2167 tag-temp store-temp)))
2168 (nth 3 method) store-temp)
2169 (list 'getf (nth 4 method) tag-temp def-temp))))
2171 (define-setf-method substring (place from &optional to)
2172 (let ((method (get-setf-method place cl-macro-environment))
2173 (from-temp (gensym "--substring-from--"))
2174 (to-temp (gensym "--substring-to--"))
2175 (store-temp (gensym "--substring-store--")))
2176 (list (append (car method) (list from-temp to-temp))
2177 (append (nth 1 method) (list from to))
2179 (list 'let (list (list (car (nth 2 method))
2180 (list 'cl-set-substring (nth 4 method)
2181 from-temp to-temp store-temp)))
2182 (nth 3 method) store-temp)
2183 (list 'substring (nth 4 method) from-temp to-temp))))
2185 (define-setf-method values (&rest args)
2186 (let ((methods (mapcar #'(lambda (x)
2187 (get-setf-method x cl-macro-environment))
2189 (store-temp (gensym "--values-store--")))
2190 (list (apply 'append (mapcar 'first methods))
2191 (apply 'append (mapcar 'second methods))
2194 (mapcar #'(lambda (m)
2195 (cl-setf-do-store (cons (car (third m)) (fourth m))
2196 (list 'pop store-temp)))
2198 (cons 'list (mapcar 'fifth methods)))))
2200 ;;; Getting and optimizing setf-methods.
2202 (defun get-setf-method (place &optional env)
2203 "Return a list of five values describing the setf-method for PLACE.
2204 PLACE may be any Lisp form which can appear as the PLACE argument to
2205 a macro like `setf' or `incf'."
2207 (let ((temp (gensym "--setf--")))
2208 (list nil nil (list temp) (list 'setq place temp) place))
2209 (or (and (symbolp (car place))
2210 (let* ((func (car place))
2211 (name (symbol-name func))
2212 (method (get func 'setf-method))
2213 (case-fold-search nil))
2215 (let ((cl-macro-environment env))
2216 (setq method (apply method (cdr place))))
2217 (if (and (consp method) (= (length method) 5))
2219 (error "Setf-method for %s returns malformed method"
2221 (and (save-match-data
2222 (string-match #r"\`c[ad][ad][ad]?[ad]?r\'" name))
2223 (get-setf-method (compiler-macroexpand place)))
2224 (and (eq func 'edebug-after)
2225 (get-setf-method (nth (1- (length place)) place)
2227 (if (eq place (setq place (macroexpand place env)))
2228 (if (and (symbolp (car place)) (fboundp (car place))
2229 (symbolp (symbol-function (car place))))
2230 (get-setf-method (cons (symbol-function (car place))
2232 (error "No setf-method known for %s" (car place)))
2233 (get-setf-method place env)))))
2235 (defun cl-setf-do-modify (place opt-expr)
2236 (let* ((method (get-setf-method place cl-macro-environment))
2237 (temps (car method)) (values (nth 1 method))
2238 (lets nil) (subs nil)
2239 (optimize (and (not (eq opt-expr 'no-opt))
2240 (or (and (not (eq opt-expr 'unsafe))
2241 (cl-safe-expr-p opt-expr))
2242 (cl-setf-simple-store-p (car (nth 2 method))
2244 (simple (and optimize (consp place) (cl-simple-exprs-p (cdr place)))))
2246 (if (or simple (cl-const-expr-p (car values)))
2247 (cl-push (cons (cl-pop temps) (cl-pop values)) subs)
2248 (cl-push (list (cl-pop temps) (cl-pop values)) lets)))
2249 (list (nreverse lets)
2250 (cons (car (nth 2 method)) (sublis subs (nth 3 method)))
2251 (sublis subs (nth 4 method)))))
2253 (defun cl-setf-do-store (spec val)
2254 (let ((sym (car spec))
2256 (if (or (cl-const-expr-p val)
2257 (and (cl-simple-expr-p val) (eq (cl-expr-contains form sym) 1))
2258 (cl-setf-simple-store-p sym form))
2259 (subst val sym form)
2260 (list 'let (list (list sym val)) form))))
2262 (defun cl-setf-simple-store-p (sym form)
2263 (and (consp form) (eq (cl-expr-contains form sym) 1)
2264 (eq (nth (1- (length form)) form) sym)
2265 (symbolp (car form)) (fboundp (car form))
2266 (not (eq (car-safe (symbol-function (car form))) 'macro))))
2268 ;;; The standard modify macros.
2270 (defmacro setf (&rest args)
2271 "(setf PLACE VAL PLACE VAL ...): set each PLACE to the value of its VAL.
2272 This is a generalized version of `setq'; the PLACEs may be symbolic
2273 references such as (car x) or (aref x i), as well as plain symbols.
2274 For example, (setf (cadar x) y) is equivalent to (setcar (cdar x) y).
2275 The return value is the last VAL in the list."
2276 (if (cdr (cdr args))
2278 (while args (cl-push (list 'setf (cl-pop args) (cl-pop args)) sets))
2279 (cons 'progn (nreverse sets)))
2280 (if (symbolp (car args))
2281 (and args (cons 'setq args))
2282 (let* ((method (cl-setf-do-modify (car args) (nth 1 args)))
2283 (store (cl-setf-do-store (nth 1 method) (nth 1 args))))
2284 (if (car method) (list 'let* (car method) store) store)))))
2287 (defmacro psetf (&rest args)
2288 "(psetf PLACE VAL PLACE VAL ...): set PLACEs to the values VALs in parallel.
2289 This is like `setf', except that all VAL forms are evaluated (in order)
2290 before assigning any PLACEs to the corresponding values."
2291 (let ((p args) (simple t) (vars nil))
2293 (if (or (not (symbolp (car p))) (cl-expr-depends-p (nth 1 p) vars))
2295 (if (memq (car p) vars)
2296 (error "Destination duplicated in psetf: %s" (car p)))
2297 (cl-push (cl-pop p) vars)
2298 (or p (error "Odd number of arguments to psetf"))
2301 (list 'progn (cons 'setf args) nil)
2302 (setq args (reverse args))
2303 (let ((expr (list 'setf (cadr args) (car args))))
2304 (while (setq args (cddr args))
2305 (setq expr (list 'setf (cadr args) (list 'prog1 (car args) expr))))
2306 (list 'progn expr nil)))))
2309 (defun cl-do-pop (place)
2310 (if (cl-simple-expr-p place)
2311 (list 'prog1 (list 'car place) (list 'setf place (list 'cdr place)))
2312 (let* ((method (cl-setf-do-modify place t))
2313 (temp (gensym "--pop--")))
2315 (append (car method)
2316 (list (list temp (nth 2 method))))
2319 (cl-setf-do-store (nth 1 method) (list 'cdr temp)))))))
2322 (defmacro remf (place tag)
2323 "(remf PLACE TAG): remove TAG from property list PLACE.
2324 PLACE may be a symbol, or any generalized variable allowed by `setf'.
2325 The form returns true if TAG was found and removed, nil otherwise."
2326 (let* ((method (cl-setf-do-modify place t))
2327 (tag-temp (and (not (cl-const-expr-p tag)) (gensym "--remf-tag--")))
2328 (val-temp (and (not (cl-simple-expr-p place))
2329 (gensym "--remf-place--")))
2330 (ttag (or tag-temp tag))
2331 (tval (or val-temp (nth 2 method))))
2333 (append (car method)
2334 (and val-temp (list (list val-temp (nth 2 method))))
2335 (and tag-temp (list (list tag-temp tag))))
2336 (list 'if (list 'eq ttag (list 'car tval))
2338 (cl-setf-do-store (nth 1 method) (list 'cddr tval))
2340 (list 'cl-do-remf tval ttag)))))
2343 (defmacro shiftf (place &rest args)
2344 "(shiftf PLACE PLACE... VAL): shift left among PLACEs.
2345 Example: (shiftf A B C) sets A to B, B to C, and returns the old A.
2346 Each PLACE may be a symbol, or any generalized variable allowed by `setf'."
2347 (if (not (memq nil (mapcar 'symbolp (butlast (cons place args)))))
2351 (cl-push (list 'setq place (car args)) sets)
2352 (setq place (cl-pop args)))
2354 (let* ((places (reverse (cons place args)))
2355 (form (cl-pop places)))
2357 (let ((method (cl-setf-do-modify (cl-pop places) 'unsafe)))
2358 (setq form (list 'let* (car method)
2359 (list 'prog1 (nth 2 method)
2360 (cl-setf-do-store (nth 1 method) form))))))
2364 (defmacro rotatef (&rest args)
2365 "(rotatef PLACE...): rotate left among PLACEs.
2366 Example: (rotatef A B C) sets A to B, B to C, and C to A. It returns nil.
2367 Each PLACE may be a symbol, or any generalized variable allowed by `setf'."
2368 (if (not (memq nil (mapcar 'symbolp args)))
2373 (setq sets (nconc sets (list (cl-pop args) (car args)))))
2374 (nconc (list 'psetf) sets (list (car args) first))))
2375 (let* ((places (reverse args))
2376 (temp (gensym "--rotatef--"))
2379 (let ((method (cl-setf-do-modify (cl-pop places) 'unsafe)))
2380 (setq form (list 'let* (car method)
2381 (list 'prog1 (nth 2 method)
2382 (cl-setf-do-store (nth 1 method) form))))))
2383 (let ((method (cl-setf-do-modify (car places) 'unsafe)))
2384 (list 'let* (append (car method) (list (list temp (nth 2 method))))
2385 (cl-setf-do-store (nth 1 method) form) nil)))))
2388 (defmacro letf (bindings &rest body)
2389 "(letf ((PLACE VALUE) ...) BODY...): temporarily bind to PLACEs.
2390 This is the analogue of `let', but with generalized variables (in the
2391 sense of `setf') for the PLACEs. Each PLACE is set to the corresponding
2392 VALUE, then the BODY forms are executed. On exit, either normally or
2393 because of a `throw' or error, the PLACEs are set back to their original
2394 values. Note that this macro is *not* available in Common Lisp.
2395 As a special case, if `(PLACE)' is used instead of `(PLACE VALUE)',
2396 the PLACE is not modified before executing BODY."
2397 (if (and (not (cdr bindings)) (cdar bindings) (symbolp (caar bindings)))
2398 (list* 'let bindings body)
2400 (rev (reverse bindings)))
2402 (let* ((place (if (symbolp (caar rev))
2403 (list 'symbol-value (list 'quote (caar rev)))
2406 (method (cl-setf-do-modify place 'no-opt))
2407 (save (gensym "--letf-save--"))
2408 (bound (and (memq (car place) '(symbol-value symbol-function))
2409 (gensym "--letf-bound--")))
2410 (temp (and (not (cl-const-expr-p value)) (cdr bindings)
2411 (gensym "--letf-val--"))))
2412 (setq lets (nconc (car method)
2415 (list (if (eq (car place)
2418 (nth 1 (nth 2 method))))
2419 (list save (list 'and bound
2421 (list (list save (nth 2 method))))
2422 (and temp (list (list temp value)))
2425 (list 'unwind-protect
2428 (cons (cl-setf-do-store (nth 1 method)
2434 (cl-setf-do-store (nth 1 method) save)
2435 (list (if (eq (car place) 'symbol-value)
2436 'makunbound 'fmakunbound)
2437 (nth 1 (nth 2 method))))
2438 (cl-setf-do-store (nth 1 method) save))))
2440 (list* 'let* lets body))))
2443 (defmacro letf* (bindings &rest body)
2444 "(letf* ((PLACE VALUE) ...) BODY...): temporarily bind to PLACEs.
2445 This is the analogue of `let*', but with generalized variables (in the
2446 sense of `setf') for the PLACEs. Each PLACE is set to the corresponding
2447 VALUE, then the BODY forms are executed. On exit, either normally or
2448 because of a `throw' or error, the PLACEs are set back to their original
2449 values. Note that this macro is *not* available in Common Lisp.
2450 As a special case, if `(PLACE)' is used instead of `(PLACE VALUE)',
2451 the PLACE is not modified before executing BODY."
2454 (setq bindings (reverse bindings))
2456 (setq body (list (list* 'letf (list (cl-pop bindings)) body))))
2460 (defmacro callf (func place &rest args)
2461 "(callf FUNC PLACE ARGS...): set PLACE to (FUNC PLACE ARGS...).
2462 FUNC should be an unquoted function name. PLACE may be a symbol,
2463 or any generalized variable allowed by `setf'."
2464 (let* ((method (cl-setf-do-modify place (cons 'list args)))
2465 (rargs (cons (nth 2 method) args)))
2466 (list 'let* (car method)
2467 (cl-setf-do-store (nth 1 method)
2468 (if (symbolp func) (cons func rargs)
2469 (list* 'funcall (list 'function func)
2473 (defmacro callf2 (func arg1 place &rest args)
2474 "(callf2 FUNC ARG1 PLACE ARGS...): set PLACE to (FUNC ARG1 PLACE ARGS...).
2475 Like `callf', but PLACE is the second argument of FUNC, not the first."
2476 (if (and (cl-safe-expr-p arg1) (cl-simple-expr-p place) (symbolp func))
2477 (list 'setf place (list* func arg1 place args))
2478 (let* ((method (cl-setf-do-modify place (cons 'list args)))
2479 (temp (and (not (cl-const-expr-p arg1)) (gensym "--arg1--")))
2480 (rargs (list* (or temp arg1) (nth 2 method) args)))
2481 (list 'let* (append (and temp (list (list temp arg1))) (car method))
2482 (cl-setf-do-store (nth 1 method)
2483 (if (symbolp func) (cons func rargs)
2484 (list* 'funcall (list 'function func)
2488 (defmacro define-modify-macro (name arglist func &optional doc)
2489 "(define-modify-macro NAME ARGLIST FUNC): define a `setf'-like modify macro.
2490 If NAME is called, it combines its PLACE argument with the other arguments
2491 from ARGLIST using FUNC: (define-modify-macro incf (&optional (n 1)) +)"
2492 (if (memq '&key arglist) (error "&key not allowed in define-modify-macro"))
2493 (let ((place (gensym "--place--")))
2494 (list 'defmacro* name (cons place arglist) doc
2495 (list* (if (memq '&rest arglist) 'list* 'list)
2496 '(quote callf) (list 'quote func) place
2497 (cl-arglist-args arglist)))))
2503 (defmacro defstruct (struct &rest descs)
2504 "(defstruct (NAME OPTIONS...) (SLOT SLOT-OPTS...)...): define a struct type.
2505 This macro defines a new Lisp data type called NAME, which contains data
2506 stored in SLOTs. This defines a `make-NAME' constructor, a `copy-NAME'
2507 copier, a `NAME-p' predicate, and setf-able `NAME-SLOT' accessors."
2508 (let* ((name (if (consp struct) (car struct) struct))
2509 (opts (cdr-safe struct))
2512 (conc-name (concat (symbol-name name) "-"))
2513 (constructor (intern (format "make-%s" name)))
2515 (copier (intern (format "copy-%s" name)))
2516 (predicate (intern (format "%s-p" name)))
2517 (print-func nil) (print-auto nil)
2518 (safety (if (cl-compiling-file) cl-optimize-safety 3))
2520 (tag (intern (format "cl-struct-%s" name)))
2521 (tag-symbol (intern (format "cl-struct-%s-tags" name)))
2527 pred-form pred-check)
2528 (if (stringp (car descs))
2529 (cl-push (list 'put (list 'quote name) '(quote structure-documentation)
2530 (cl-pop descs)) forms))
2531 (setq descs (cons '(cl-tag-slot)
2532 (mapcar #'(lambda (x) (if (consp x) x (list x)))
2535 (let ((opt (if (consp (car opts)) (caar opts) (car opts)))
2536 (args (cdr-safe (cl-pop opts))))
2537 (cond ((eq opt ':conc-name)
2539 (setq conc-name (if (car args)
2540 (symbol-name (car args)) ""))))
2541 ((eq opt ':constructor)
2543 (cl-push args constrs)
2544 (if args (setq constructor (car args)))))
2546 (if args (setq copier (car args))))
2547 ((eq opt ':predicate)
2548 (if args (setq predicate (car args))))
2550 (setq include (car args)
2551 include-descs (mapcar #'(lambda (x)
2552 (if (consp x) x (list x)))
2554 ((eq opt ':print-function)
2555 (setq print-func (car args)))
2557 (setq type (car args)))
2560 ((eq opt ':initial-offset)
2561 (setq descs (nconc (make-list (car args) '(cl-skip-slot))
2564 (error "Slot option %s unrecognized" opt)))))
2566 (setq print-func (list 'progn
2567 (list 'funcall (list 'function print-func)
2568 'cl-x 'cl-s 'cl-n) t))
2569 (or type (and include (not (get include 'cl-struct-print)))
2571 print-func (and (or (not (or include type)) (null print-func))
2573 (list 'princ (format "#S(%s" name)
2576 (let ((inc-type (get include 'cl-struct-type))
2577 (old-descs (get include 'cl-struct-slots)))
2578 (or inc-type (error "%s is not a struct name" include))
2579 (and type (not (eq (car inc-type) type))
2580 (error ":type disagrees with :include for %s" name))
2581 (while include-descs
2582 (setcar (memq (or (assq (caar include-descs) old-descs)
2583 (error "No slot %s in included struct %s"
2584 (caar include-descs) include))
2586 (cl-pop include-descs)))
2587 (setq descs (append old-descs (delq (assq 'cl-tag-slot descs) descs))
2589 named (assq 'cl-tag-slot descs))
2590 (if (cadr inc-type) (setq tag name named t))
2591 (let ((incl include))
2593 (cl-push (list 'pushnew (list 'quote tag)
2594 (intern (format "cl-struct-%s-tags" incl)))
2596 (setq incl (get incl 'cl-struct-include)))))
2599 (or (memq type '(vector list))
2600 (error "Illegal :type specifier: %s" type))
2601 (if named (setq tag name)))
2602 (setq type 'vector named 'true)))
2603 (or named (setq descs (delq (assq 'cl-tag-slot descs) descs)))
2604 (cl-push (list 'defvar tag-symbol) forms)
2605 (setq pred-form (and named
2606 (let ((pos (- (length descs)
2607 (length (memq (assq 'cl-tag-slot descs)
2609 (if (eq type 'vector)
2610 (list 'and '(vectorp cl-x)
2611 (list '>= '(length cl-x) (length descs))
2612 (list 'memq (list 'aref 'cl-x pos)
2615 (list 'memq '(car-safe cl-x) tag-symbol)
2616 (list 'and '(consp cl-x)
2617 (list 'memq (list 'nth pos 'cl-x)
2619 pred-check (and pred-form (> safety 0)
2620 (if (and (eq (caadr pred-form) 'vectorp)
2622 (cons 'and (cdddr pred-form)) pred-form)))
2623 (let ((pos 0) (descp descs))
2625 (let* ((desc (cl-pop descp))
2627 (if (memq slot '(cl-tag-slot cl-skip-slot))
2630 (cl-push (and (eq slot 'cl-tag-slot) (list 'quote tag))
2632 (if (assq slot descp)
2633 (error "Duplicate slots named %s in %s" slot name))
2634 (let ((accessor (intern (format "%s%s" conc-name slot))))
2635 (cl-push slot slots)
2636 (cl-push (nth 1 desc) defaults)
2638 'defsubst* accessor '(cl-x)
2641 (list (list 'or pred-check
2643 (format "%s accessing a non-%s"
2646 (list (if (eq type 'vector) (list 'aref 'cl-x pos)
2647 (if (= pos 0) '(car cl-x)
2648 (list 'nth pos 'cl-x)))))) forms)
2649 (cl-push (cons accessor t) side-eff)
2650 (cl-push (list 'define-setf-method accessor '(cl-x)
2651 (if (cadr (memq ':read-only (cddr desc)))
2652 (list 'error (format "%s is a read-only slot"
2654 (list 'cl-struct-setf-expander 'cl-x
2655 (list 'quote name) (list 'quote accessor)
2656 (and pred-check (list 'quote pred-check))
2661 (list (list 'princ (format " %s" slot) 'cl-s)
2662 (list 'prin1 (list accessor 'cl-x) 'cl-s)))))))
2663 (setq pos (1+ pos))))
2664 (setq slots (nreverse slots)
2665 defaults (nreverse defaults))
2666 (and predicate pred-form
2667 (progn (cl-push (list 'defsubst* predicate '(cl-x)
2668 (if (eq (car pred-form) 'and)
2669 (append pred-form '(t))
2670 (list 'and pred-form t))) forms)
2671 (cl-push (cons predicate 'error-free) side-eff)))
2673 (progn (cl-push (list 'defun copier '(x) '(copy-sequence x)) forms)
2674 (cl-push (cons copier t) side-eff)))
2676 (cl-push (list constructor
2677 (cons '&key (delq nil (copy-sequence slots))))
2680 (let* ((name (caar constrs))
2681 (args (cadr (cl-pop constrs)))
2682 (anames (cl-arglist-args args))
2683 (make (mapcar* #'(lambda (s d) (if (memq s anames) s d))
2685 (cl-push (list 'defsubst* name
2686 (list* '&cl-defs (list 'quote (cons nil descs)) args)
2687 (cons type make)) forms)
2688 (if (cl-safe-expr-p (cons 'progn (mapcar 'second descs)))
2689 (cl-push (cons name t) side-eff))))
2690 (if print-auto (nconc print-func (list '(princ ")" cl-s) t)))
2692 (cl-push (list 'push
2694 (list 'lambda '(cl-x cl-s cl-n)
2695 (list 'and pred-form print-func)))
2696 'custom-print-functions) forms))
2697 (cl-push (list 'setq tag-symbol (list 'list (list 'quote tag))) forms)
2698 (cl-push (list* 'eval-when '(compile load eval)
2699 (list 'put (list 'quote name) '(quote cl-struct-slots)
2700 (list 'quote descs))
2701 (list 'put (list 'quote name) '(quote cl-struct-type)
2702 (list 'quote (list type (eq named t))))
2703 (list 'put (list 'quote name) '(quote cl-struct-include)
2704 (list 'quote include))
2705 (list 'put (list 'quote name) '(quote cl-struct-print)
2707 (mapcar #'(lambda (x)
2708 (list 'put (list 'quote (car x))
2709 '(quote side-effect-free)
2710 (list 'quote (cdr x))))
2713 (cons 'progn (nreverse (cons (list 'quote name) forms)))))
2716 (defun cl-struct-setf-expander (x name accessor pred-form pos)
2717 (let* ((temp (gensym "--x--")) (store (gensym "--store--")))
2718 (list (list temp) (list x) (list store)
2721 (list (list 'or (subst temp 'cl-x pred-form)
2724 "%s storing a non-%s" accessor name)
2726 (list (if (eq (car (get name 'cl-struct-type)) 'vector)
2727 (list 'aset temp pos store)
2731 (while (>= (setq pos (1- pos)) 0)
2732 (setq xx (list 'cdr xx)))
2734 (list 'nthcdr pos temp))
2736 (list accessor temp))))
2739 ;;; Types and assertions.
2742 (defmacro deftype (name args &rest body)
2743 "(deftype NAME ARGLIST BODY...): define NAME as a new data type.
2744 The type name can then be used in `typecase', `check-type', etc."
2745 (list 'eval-when '(compile load eval)
2746 (cl-transform-function-property
2747 name 'cl-deftype-handler (cons (list* '&cl-defs ''('*) args) body))))
2749 (defun cl-make-type-test (val type)
2751 (cond ((get type 'cl-deftype-handler)
2752 (cl-make-type-test val (funcall (get type 'cl-deftype-handler))))
2753 ((memq type '(nil t)) type)
2754 ((eq type 'string-char) (list 'characterp val))
2755 ((eq type 'null) (list 'null val))
2756 ((eq type 'float) (list 'floatp-safe val))
2757 ((eq type 'real) (list 'numberp val))
2758 ((eq type 'fixnum) (list 'integerp val))
2760 (let* ((name (symbol-name type))
2761 (namep (intern (concat name "p"))))
2762 (if (fboundp namep) (list namep val)
2763 (list (intern (concat name "-p")) val)))))
2764 (cond ((get (car type) 'cl-deftype-handler)
2765 (cl-make-type-test val (apply (get (car type) 'cl-deftype-handler)
2767 ((memq (car-safe type) '(integer float real number))
2768 (delq t (list 'and (cl-make-type-test val (car type))
2769 (if (memq (cadr type) '(* nil)) t
2770 (if (consp (cadr type)) (list '> val (caadr type))
2771 (list '>= val (cadr type))))
2772 (if (memq (caddr type) '(* nil)) t
2773 (if (consp (caddr type)) (list '< val (caaddr type))
2774 (list '<= val (caddr type)))))))
2775 ((memq (car-safe type) '(and or not))
2777 (mapcar #'(lambda (x) (cl-make-type-test val x))
2779 ((memq (car-safe type) '(member member*))
2780 (list 'and (list 'member* val (list 'quote (cdr type))) t))
2781 ((eq (car-safe type) 'satisfies) (list (cadr type) val))
2782 (t (error "Bad type spec: %s" type)))))
2785 (defun typep (object type) ; See compiler macro below.
2786 "Check that OBJECT is of type TYPE.
2787 TYPE is a Common Lisp-style type specifier."
2788 (eval (cl-make-type-test 'object type)))
2791 (defmacro check-type (place type &optional string)
2792 "Verify that PLACE is of type TYPE; signal a continuable error if not.
2793 STRING is an optional description of the desired type."
2794 (when (or (not (cl-compiling-file))
2795 (< cl-optimize-speed 3)
2796 (= cl-optimize-safety 3))
2797 (let* ((temp (if (cl-simple-expr-p place 3) place (gensym)))
2798 (test (cl-make-type-test temp type))
2799 (signal-error `(signal 'wrong-type-argument
2800 ,(list 'list (or string (list 'quote type))
2801 temp (list 'quote place))))
2805 ,(macroexpand `(setf ,place ,signal-error)))
2807 `(if ,test (progn ,signal-error nil))))))
2810 `(let ((,temp ,place)) ,body)))))
2813 (defmacro assert (form &optional show-args string &rest args)
2814 "Verify that FORM returns non-nil; signal an error if not.
2815 Second arg SHOW-ARGS means to include arguments of FORM in message.
2816 Other args STRING and ARGS... are arguments to be passed to `error'.
2817 They are not evaluated unless the assertion fails. If STRING is
2818 omitted, a default message listing FORM itself is used."
2819 (and (or (not (cl-compiling-file))
2820 (< cl-optimize-speed 3) (= cl-optimize-safety 3))
2821 (let ((sargs (and show-args (delq nil (mapcar
2823 (and (not (cl-const-expr-p x))
2829 (list* 'error string (append sargs args))
2830 (list 'signal '(quote cl-assertion-failed)
2831 (list* 'list (list 'quote form) sargs))))
2835 (defmacro ignore-errors (&rest body)
2836 "Execute FORMS; if an error occurs, return nil.
2837 Otherwise, return result of last FORM."
2838 `(condition-case nil (progn ,@body) (error nil)))
2841 (defmacro ignore-file-errors (&rest body)
2842 "Execute FORMS; if an error of type `file-error' occurs, return nil.
2843 Otherwise, return result of last FORM."
2844 `(condition-case nil (progn ,@body) (file-error nil)))
2846 ;;; Some predicates for analyzing Lisp forms. These are used by various
2847 ;;; macro expanders to optimize the results in certain common cases.
2849 (defconst cl-simple-funcs '(car cdr nth aref elt if and or + - 1+ 1- min max
2850 car-safe cdr-safe progn prog1 prog2))
2851 (defconst cl-safe-funcs '(* / % length memq list vector vectorp
2854 ;;; Check if no side effects, and executes quickly.
2855 (defun cl-simple-expr-p (x &optional size)
2856 (or size (setq size 10))
2857 (if (and (consp x) (not (memq (car x) '(quote function function*))))
2858 (and (symbolp (car x))
2859 (or (memq (car x) cl-simple-funcs)
2860 (get (car x) 'side-effect-free))
2862 (setq size (1- size))
2863 (while (and (setq x (cdr x))
2864 (setq size (cl-simple-expr-p (car x) size))))
2865 (and (null x) (>= size 0) size)))
2866 (and (> size 0) (1- size))))
2868 (defun cl-simple-exprs-p (xs)
2869 (while (and xs (cl-simple-expr-p (car xs)))
2873 ;;; Check if no side effects.
2874 (defun cl-safe-expr-p (x)
2875 (or (not (and (consp x) (not (memq (car x) '(quote function function*)))))
2876 (and (symbolp (car x))
2877 (or (memq (car x) cl-simple-funcs)
2878 (memq (car x) cl-safe-funcs)
2879 (get (car x) 'side-effect-free))
2881 (while (and (setq x (cdr x)) (cl-safe-expr-p (car x))))
2884 ;;; Check if constant (i.e., no side effects or dependencies).
2885 (defun cl-const-expr-p (x)
2887 (or (eq (car x) 'quote)
2888 (and (memq (car x) '(function function*))
2889 (or (symbolp (nth 1 x))
2890 (and (eq (car-safe (nth 1 x)) 'lambda) 'func)))))
2891 ((symbolp x) (and (memq x '(nil t)) t))
2894 (defun cl-const-exprs-p (xs)
2895 (while (and xs (cl-const-expr-p (car xs)))
2899 (defun cl-const-expr-val (x)
2900 (and (eq (cl-const-expr-p x) t) (if (consp x) (nth 1 x) x)))
2902 (defun cl-expr-access-order (x v)
2903 (if (cl-const-expr-p x) v
2906 (while (setq x (cdr x)) (setq v (cl-expr-access-order (car x) v)))
2908 (if (eq x (car v)) (cdr v) '(t)))))
2910 ;;; Count number of times X refers to Y. Return NIL for 0 times.
2911 (defun cl-expr-contains (x y)
2912 (cond ((equal y x) 1)
2913 ((and (consp x) (not (memq (car-safe x) '(quote function function*))))
2916 (setq sum (+ sum (or (cl-expr-contains (cl-pop x) y) 0))))
2917 (and (> sum 0) sum)))
2920 (defun cl-expr-contains-any (x y)
2921 (while (and y (not (cl-expr-contains x (car y)))) (cl-pop y))
2924 ;;; Check whether X may depend on any of the symbols in Y.
2925 (defun cl-expr-depends-p (x y)
2926 (and (not (cl-const-expr-p x))
2927 (or (not (cl-safe-expr-p x)) (cl-expr-contains-any x y))))
2930 ;;; Compiler macros.
2933 (defmacro define-compiler-macro (func args &rest body)
2934 "(define-compiler-macro FUNC ARGLIST BODY...): Define a compiler-only macro.
2935 This is like `defmacro', but macro expansion occurs only if the call to
2936 FUNC is compiled (i.e., not interpreted). Compiler macros should be used
2937 for optimizing the way calls to FUNC are compiled; the form returned by
2938 BODY should do the same thing as a call to the normal function called
2939 FUNC, though possibly more efficiently. Note that, like regular macros,
2940 compiler macros are expanded repeatedly until no further expansions are
2941 possible. Unlike regular macros, BODY can decide to \"punt\" and leave the
2942 original function call alone by declaring an initial `&whole foo' parameter
2943 and then returning foo."
2944 (let ((p (if (listp args) args (list '&rest args))) (res nil))
2945 (while (consp p) (cl-push (cl-pop p) res))
2946 (setq args (nreverse res)) (setcdr res (and p (list '&rest p))))
2947 (list 'eval-when '(compile load eval)
2948 (cl-transform-function-property
2949 func 'cl-compiler-macro
2950 (cons (if (memq '&whole args) (delq '&whole args)
2951 (cons '--cl-whole-arg-- args)) body))
2952 (list 'or (list 'get (list 'quote func) '(quote byte-compile))
2953 (list 'put (list 'quote func) '(quote byte-compile)
2954 '(quote cl-byte-compile-compiler-macro)))))
2957 (defun compiler-macroexpand (form)
2959 (let ((func (car-safe form)) (handler nil))
2960 (while (and (symbolp func)
2961 (not (setq handler (get func 'cl-compiler-macro)))
2963 (or (not (eq (car-safe (symbol-function func)) 'autoload))
2964 (load (nth 1 (symbol-function func)))))
2965 (setq func (symbol-function func)))
2967 (not (eq form (setq form (apply handler form (cdr form))))))))
2970 (defun cl-byte-compile-compiler-macro (form)
2971 (if (eq form (setq form (compiler-macroexpand form)))
2972 (byte-compile-normal-call form)
2973 (byte-compile-form form)))
2975 (defmacro defsubst* (name args &rest body)
2976 "(defsubst* NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
2977 Like `defun', except the function is automatically declared `inline',
2978 ARGLIST allows full Common Lisp conventions, and BODY is implicitly
2979 surrounded by (block NAME ...)."
2980 (let* ((argns (cl-arglist-args args)) (p argns)
2981 (pbody (cons 'progn body))
2982 (unsafe (not (cl-safe-expr-p pbody))))
2983 (while (and p (eq (cl-expr-contains args (car p)) 1)) (cl-pop p))
2985 (if p nil ; give up if defaults refer to earlier args
2986 (list 'define-compiler-macro name
2987 (list* '&whole 'cl-whole '&cl-quote args)
2988 (list* 'cl-defsubst-expand (list 'quote argns)
2989 (list 'quote (list* 'block name body))
2990 (not (or unsafe (cl-expr-access-order pbody argns)))
2991 (and (memq '&key args) 'cl-whole) unsafe argns)))
2992 (list* 'defun* name args body))))
2994 (defun cl-defsubst-expand (argns body simple whole unsafe &rest argvs)
2995 (if (and whole (not (cl-safe-expr-p (cons 'progn argvs)))) whole
2996 (if (cl-simple-exprs-p argvs) (setq simple t))
2997 (let ((lets (delq nil
2998 (mapcar* #'(lambda (argn argv)
2999 (if (or simple (cl-const-expr-p argv))
3000 (progn (setq body (subst argv argn body))
3001 (and unsafe (list argn argv)))
3004 (if lets (list 'let lets body) body))))
3007 ;;; Compile-time optimizations for some functions defined in this package.
3008 ;;; Note that cl.el arranges to force cl-macs to be loaded at compile-time,
3009 ;;; mainly to make sure these macros will be present.
3011 (put 'eql 'byte-compile nil)
3012 (define-compiler-macro eql (&whole form a b)
3013 (cond ((eq (cl-const-expr-p a) t)
3014 (let ((val (cl-const-expr-val a)))
3015 (if (and (numberp val) (not (integerp val)))
3018 ((eq (cl-const-expr-p b) t)
3019 (let ((val (cl-const-expr-val b)))
3020 (if (and (numberp val) (not (integerp val)))
3023 ((cl-simple-expr-p a 5)
3024 (list 'if (list 'numberp a)
3027 ((and (cl-safe-expr-p a)
3028 (cl-simple-expr-p b 5))
3029 (list 'if (list 'numberp b)
3034 (define-compiler-macro member* (&whole form a list &rest keys)
3035 (let ((test (and (= (length keys) 2) (eq (car keys) ':test)
3036 (cl-const-expr-val (nth 1 keys)))))
3037 (cond ((eq test 'eq) (list 'memq a list))
3038 ((eq test 'equal) (list 'member a list))
3039 ((or (null keys) (eq test 'eql))
3040 (if (eq (cl-const-expr-p a) t)
3041 (list (if (floatp-safe (cl-const-expr-val a)) 'member 'memq)
3043 (if (eq (cl-const-expr-p list) t)
3044 (let ((p (cl-const-expr-val list)) (mb nil) (mq nil))
3046 (and p (list 'eql a (list 'quote (car p))))
3048 (if (floatp-safe (car p)) (setq mb t)
3049 (or (integerp (car p)) (symbolp (car p)) (setq mq t)))
3051 (if (not mb) (list 'memq a list)
3052 (if (not mq) (list 'member a list) form))))
3056 (define-compiler-macro assoc* (&whole form a list &rest keys)
3057 (let ((test (and (= (length keys) 2) (eq (car keys) ':test)
3058 (cl-const-expr-val (nth 1 keys)))))
3059 (cond ((eq test 'eq) (list 'assq a list))
3060 ((eq test 'equal) (list 'assoc a list))
3061 ((and (eq (cl-const-expr-p a) t) (or (null keys) (eq test 'eql)))
3062 (if (floatp-safe (cl-const-expr-val a))
3063 (list 'assoc a list) (list 'assq a list)))
3066 (define-compiler-macro adjoin (&whole form a list &rest keys)
3067 (if (and (cl-simple-expr-p a) (cl-simple-expr-p list)
3068 (not (memq ':key keys)))
3069 (list 'if (list* 'member* a list keys) list (list 'cons a list))
3072 (define-compiler-macro list* (arg &rest others)
3073 (let* ((args (reverse (cons arg others)))
3075 (while (setq args (cdr args))
3076 (setq form (list 'cons (car args) form)))
3079 (define-compiler-macro get* (sym prop &optional default)
3080 (list 'get sym prop default))
3082 (define-compiler-macro getf (sym prop &optional default)
3083 (list 'plist-get sym prop default))
3085 (define-compiler-macro typep (&whole form val type)
3086 (if (cl-const-expr-p type)
3087 (let ((res (cl-make-type-test val (cl-const-expr-val type))))
3088 (if (or (memq (cl-expr-contains res val) '(nil 1))
3089 (cl-simple-expr-p val)) res
3090 (let ((temp (gensym)))
3091 (list 'let (list (list temp val)) (subst temp val res)))))
3097 (put (car y) 'side-effect-free t)
3098 (put (car y) 'byte-compile 'cl-byte-compile-compiler-macro)
3099 (put (car y) 'cl-compiler-macro
3100 (list 'lambda '(w x)
3101 (if (symbolp (cadr y))
3102 (list 'list (list 'quote (cadr y))
3103 (list 'list (list 'quote (caddr y)) 'x))
3104 (cons 'list (cdr y))))))
3105 '((first 'car x) (second 'cadr x) (third 'caddr x) (fourth 'cadddr x)
3106 (fifth 'nth 4 x) (sixth 'nth 5 x) (seventh 'nth 6 x)
3107 (eighth 'nth 7 x) (ninth 'nth 8 x) (tenth 'nth 9 x)
3108 (rest 'cdr x) (endp 'null x) (plusp '> x 0) (minusp '< x 0)
3109 (oddp 'eq (list 'logand x 1) 1)
3110 (evenp 'eq (list 'logand x 1) 0)
3111 (caar car car) (cadr car cdr) (cdar cdr car) (cddr cdr cdr)
3112 (caaar car caar) (caadr car cadr) (cadar car cdar)
3113 (caddr car cddr) (cdaar cdr caar) (cdadr cdr cadr)
3114 (cddar cdr cdar) (cdddr cdr cddr) (caaaar car caaar)
3115 (caaadr car caadr) (caadar car cadar) (caaddr car caddr)
3116 (cadaar car cdaar) (cadadr car cdadr) (caddar car cddar)
3117 (cadddr car cdddr) (cdaaar cdr caaar) (cdaadr cdr caadr)
3118 (cdadar cdr cadar) (cdaddr cdr caddr) (cddaar cdr cdaar)
3119 (cddadr cdr cdadr) (cdddar cdr cddar) (cddddr cdr cdddr)))
3121 ;;; Things that are inline.
3122 (proclaim '(inline floatp-safe acons map concatenate notany notevery
3124 cl-set-elt revappend nreconc
3127 ;;; Things that are side-effect-free. Moved to byte-optimize.el
3128 ;(dolist (fun '(oddp evenp plusp minusp
3129 ; abs expt signum last butlast ldiff
3131 ; isqrt floor* ceiling* truncate* round* mod* rem* subseq
3132 ; list-length getf))
3133 ; (put fun 'side-effect-free t))
3135 ;;; Things that are side-effect-and-error-free. Moved to byte-optimize.el
3136 ;(dolist (fun '(eql floatp-safe list* subst acons equalp random-state-p
3137 ; copy-tree sublis))
3138 ; (put fun 'side-effect-free 'error-free))
3141 (run-hooks 'cl-macs-load-hook)
3143 ;;; cl-macs.el ends here