/[cmucl]/src/code/macros.lisp
ViewVC logotype

Contents of /src/code/macros.lisp

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.41 - (hide annotations)
Fri Jul 2 15:12:27 1993 UTC (20 years, 9 months ago) by ram
Branch: MAIN
Changes since 1.40: +30 -30 lines
Changed uses of RESTART-CASE to be detectable calls to error.
 
1 ram 1.1 ;;; -*- Log: code.log; Package: Lisp -*-
2     ;;;
3     ;;; **********************************************************************
4 ram 1.20 ;;; This code was written as part of the CMU Common Lisp project at
5     ;;; Carnegie Mellon University, and has been placed in the public domain.
6     ;;; If you want to use this code or any part of CMU Common Lisp, please contact
7     ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
8     ;;;
9     (ext:file-comment
10 ram 1.41 "$Header: /tiger/var/lib/cvsroots/cmucl/src/code/macros.lisp,v 1.41 1993/07/02 15:12:27 ram Exp $")
11 ram 1.20 ;;;
12 ram 1.1 ;;; **********************************************************************
13     ;;;
14     ;;; This file contains the macros that are part of the standard
15     ;;; Spice Lisp environment.
16     ;;;
17     ;;; Written by Scott Fahlman and Rob MacLachlan.
18 ram 1.22 ;;; Modified by Bill Chiles to adhere to the wall.
19 ram 1.1 ;;;
20 wlott 1.10 (in-package "LISP")
21 wlott 1.13 (export '(defvar defparameter defconstant when unless setf
22 ram 1.39 defsetf psetf shiftf rotatef push pushnew pop
23 ram 1.1 incf decf remf case typecase with-open-file
24     with-open-stream with-input-from-string with-output-to-string
25     locally etypecase ctypecase ecase ccase
26 ram 1.39 get-setf-expansion define-setf-expander
27 ram 1.18 define-modify-macro destructuring-bind nth-value
28 wlott 1.33 otherwise ; Sacred to CASE and related macros.
29 ram 1.39 define-compiler-macro
30     ;; CLtL1 versions:
31     define-setf-method get-setf-method get-setf-method-multiple-value))
32 ram 1.1
33     (in-package "EXTENSIONS")
34     (export '(do-anonymous collect iterate))
35    
36     (in-package "LISP")
37    
38    
39     ;;; Parse-Body -- Public
40     ;;;
41     ;;; Parse out declarations and doc strings, *not* expanding macros.
42     ;;; Eventually the environment arg should be flushed, since macros can't expand
43     ;;; into declarations anymore.
44     ;;;
45     (defun parse-body (body environment &optional (doc-string-allowed t))
46     "This function is to parse the declarations and doc-string out of the body of
47     a defun-like form. Body is the list of stuff which is to be parsed.
48     Environment is ignored. If Doc-String-Allowed is true, then a doc string
49     will be parsed out of the body and returned. If it is false then a string
50     will terminate the search for declarations. Three values are returned: the
51     tail of Body after the declarations and doc strings, a list of declare forms,
52     and the doc-string, or NIL if none."
53     (declare (ignore environment))
54     (let ((decls ())
55     (doc nil))
56     (do ((tail body (cdr tail)))
57     ((endp tail)
58     (values tail (nreverse decls) doc))
59     (let ((form (car tail)))
60     (cond ((and (stringp form) (cdr tail))
61     (if doc-string-allowed
62     (setq doc form)
63     (return (values tail (nreverse decls) doc))))
64     ((not (and (consp form) (symbolp (car form))))
65     (return (values tail (nreverse decls) doc)))
66     ((eq (car form) 'declare)
67     (push form decls))
68     (t
69     (return (values tail (nreverse decls) doc))))))))
70    
71    
72     ;;;; DEFMACRO:
73    
74     ;;; Defmacro -- Public
75     ;;;
76     ;;; Parse the definition and make an expander function. The actual
77     ;;; definition is done by %defmacro which we expand into.
78     ;;;
79     (defmacro defmacro (name lambda-list &body body)
80 wlott 1.13 (let ((whole (gensym "WHOLE-"))
81     (environment (gensym "ENV-")))
82 ram 1.1 (multiple-value-bind
83     (body local-decs doc)
84 wlott 1.13 (parse-defmacro lambda-list whole body name 'defmacro
85     :environment environment)
86 ram 1.1 (let ((def `(lambda (,whole ,environment)
87     ,@local-decs
88     (block ,name
89     ,body))))
90 wlott 1.13 `(c::%defmacro ',name #',def ',lambda-list ,doc)))))
91 ram 1.1
92    
93     ;;; %Defmacro, %%Defmacro -- Internal
94     ;;;
95     ;;; Defmacro expands into %Defmacro which is a function that is treated
96     ;;; magically the compiler. After the compiler has gotten the information it
97     ;;; wants out of macro definition, it compiles a call to %%Defmacro which
98     ;;; happens at load time. We have a %Defmacro function which just calls
99     ;;; %%Defmacro in order to keep the interpreter happy.
100     ;;;
101     ;;; Eventually %%Defmacro should deal with clearing old compiler information
102     ;;; for the functional value.
103     ;;;
104     (defun c::%defmacro (name definition lambda-list doc)
105 wlott 1.13 (assert (eval:interpreted-function-p definition))
106     (setf (eval:interpreted-function-name definition)
107     (format nil "DEFMACRO ~S" name))
108     (setf (eval:interpreted-function-arglist definition) lambda-list)
109 ram 1.1 (c::%%defmacro name definition doc))
110     ;;;
111     (defun c::%%defmacro (name definition doc)
112     (clear-info function where-from name)
113 wlott 1.10 (setf (macro-function name) definition)
114 ram 1.1 (setf (documentation name 'function) doc)
115     name)
116 wlott 1.33
117    
118    
119     ;;;; DEFINE-COMPILER-MACRO
120    
121     (defmacro define-compiler-macro (name lambda-list &body body)
122     "Define a compiler-macro for NAME."
123     (let ((whole (gensym "WHOLE-"))
124     (environment (gensym "ENV-")))
125     (multiple-value-bind
126     (body local-decs doc)
127     (parse-defmacro lambda-list whole body name 'define-compiler-macro
128     :environment environment)
129     (let ((def `(lambda (,whole ,environment)
130     ,@local-decs
131     (block ,name
132     ,body))))
133     `(c::%define-compiler-macro ',name #',def ',lambda-list ,doc)))))
134    
135     (defun c::%define-compiler-macro (name definition lambda-list doc)
136     (assert (eval:interpreted-function-p definition))
137     (setf (eval:interpreted-function-name definition)
138     (let ((*print-case* :upcase))
139     (format nil "DEFINE-COMPILER-MACRO ~S" name)))
140     (setf (eval:interpreted-function-arglist definition) lambda-list)
141     (c::%%define-compiler-macro name definition doc))
142     ;;;
143     (defun c::%%define-compiler-macro (name definition doc)
144     (setf (compiler-macro-function name) definition)
145     (setf (documentation name 'compiler-macro) doc)
146     name)
147    
148 ram 1.1
149    
150     ;;; DEFTYPE is a lot like DEFMACRO.
151    
152     (defmacro deftype (name arglist &body body)
153     "Syntax like DEFMACRO, but defines a new type."
154     (unless (symbolp name)
155     (error "~S -- Type name not a symbol." name))
156    
157 wlott 1.13 (let ((whole (gensym "WHOLE-")))
158 ram 1.1 (multiple-value-bind (body local-decs doc)
159 wlott 1.13 (parse-defmacro arglist whole body name 'deftype
160     :default-default ''*)
161     `(eval-when (compile load eval)
162     (%deftype ',name
163     #'(lambda (,whole)
164     ,@local-decs
165     (block ,name ,body))
166     ,@(when doc `(,doc)))))))
167 ram 1.7 ;;;
168     (defun %deftype (name expander &optional doc)
169 ram 1.12 (ecase (info type kind name)
170     (:primitive
171 ram 1.36 (when *type-system-initialized*
172     (error "Illegal to redefine standard type: ~S." name)))
173     (:instance
174     (warn "Redefining class ~S to be a DEFTYPE." name)
175     (undefine-structure (layout-info (class-layout (info type class name))))
176     (setf (info type class name) nil)
177     (setf (info type compiler-layout name) nil)
178     (setf (info type kind name) :defined))
179     (:defined)
180     ((nil)
181     (setf (info type kind name) :defined)))
182    
183 wlott 1.13 (setf (info type expander name) expander)
184 ram 1.7 (when doc
185     (setf (documentation name 'type) doc))
186 wlott 1.10 ;; ### Bootstrap hack -- we need to define types before %note-type-defined
187     ;; is defined.
188 ram 1.12 (when (fboundp 'c::%note-type-defined)
189 wlott 1.10 (c::%note-type-defined name))
190 ram 1.7 name)
191    
192 ram 1.1
193 ram 1.39 ;;; And so is DEFINE-SETF-EXPANDER.
194 ram 1.1
195     (defparameter defsetf-error-string "Setf expander for ~S cannot be called with ~S args.")
196    
197 ram 1.39 (defmacro define-setf-expander (access-fn lambda-list &body body)
198 ram 1.1 "Syntax like DEFMACRO, but creates a Setf-Method generator. The body
199     must be a form that returns the five magical values."
200     (unless (symbolp access-fn)
201     (error "~S -- Access-function name not a symbol in DEFINE-SETF-METHOD."
202     access-fn))
203    
204 wlott 1.13 (let ((whole (gensym "WHOLE-"))
205     (environment (gensym "ENV-")))
206 ram 1.1 (multiple-value-bind (body local-decs doc)
207     (parse-defmacro lambda-list whole body access-fn
208 wlott 1.13 'define-setf-method
209     :environment environment)
210 ram 1.1 `(eval-when (load compile eval)
211 ram 1.22 (%define-setf-macro
212     ',access-fn
213     #'(lambda (,whole ,environment)
214     ,@local-decs
215     (block ,access-fn ,body))
216     nil
217     ',doc)))))
218 ram 1.1
219 ram 1.39 (defmacro define-setf-method (&rest stuff)
220     "Obsolete, use define-setf-expander."
221     `(define-setf-expander ,@stuff))
222 ram 1.22
223 ram 1.39
224 ram 1.22 ;;; %DEFINE-SETF-MACRO -- Internal
225     ;;;
226     ;;; Do stuff for defining a setf macro.
227     ;;;
228     (defun %define-setf-macro (name expander inverse doc)
229     (cond ((not (fboundp `(setf ,name))))
230     ((info function accessor-for name)
231     (warn "Defining setf macro for destruct slot accessor; redefining as ~
232     a normal function:~% ~S"
233     name)
234     (c::define-function-name name))
235     ((not (eq (symbol-package name) (symbol-package 'aref)))
236     (warn "Defining setf macro for ~S, but ~S is fbound."
237     name `(setf ,name))))
238     (when (or inverse (info setf inverse name))
239     (setf (info setf inverse name) inverse))
240     (when (or expander (info setf expander name))
241     (setf (info setf expander name) expander))
242     (when doc
243     (setf (documentation name 'setf) doc))
244     name)
245    
246 wlott 1.13
247     ;;;; Destructuring-bind
248 ram 1.1
249 wlott 1.13 (defmacro destructuring-bind (lambda-list arg-list &rest body)
250     "Bind the variables in LAMBDA-LIST to the contents of ARG-LIST."
251     (let* ((arg-list-name (gensym "ARG-LIST-")))
252     (multiple-value-bind
253 wlott 1.14 (body local-decls)
254 wlott 1.17 (parse-defmacro lambda-list arg-list-name body nil 'destructuring-bind
255 wlott 1.13 :annonymousp t :doc-string-allowed nil)
256     `(let ((,arg-list-name ,arg-list))
257 wlott 1.14 ,@local-decls
258 wlott 1.13 ,body))))
259    
260 ram 1.1
261     ;;;; Defun, Defvar, Defparameter, Defconstant:
262    
263     ;;; Defun -- Public
264     ;;;
265     ;;; Very similar to Defmacro, but simpler. We don't have to parse the
266     ;;; lambda-list.
267     ;;;
268 wlott 1.13 (defmacro defun (&whole source name lambda-list &body (body decls doc))
269 ram 1.1 (let ((def `(lambda ,lambda-list
270     ,@decls
271     (block ,(if (and (consp name) (eq (car name) 'setf))
272     (cadr name)
273     name)
274     ,@body))))
275     `(c::%defun ',name #',def ,doc ',source)))
276    
277    
278     ;;; %Defun, %%Defun -- Internal
279     ;;;
280     ;;; Similar to %Defmacro, ...
281     ;;;
282     (defun c::%%defun (name def doc &optional inline-expansion)
283     (setf (fdefinition name) def)
284     (when doc
285     (if (and (consp name) (eq (first name) 'setf))
286     (setf (documentation (second name) 'setf) doc)
287     (setf (documentation name 'function) doc)))
288 ram 1.12 (c::define-function-name name)
289     (when (eq (info function where-from name) :assumed)
290     (setf (info function where-from name) :defined)
291     (when (info function assumed-type name)
292     (setf (info function assumed-type name) nil)))
293 ram 1.1 (when (or inline-expansion
294     (info function inline-expansion name))
295     (setf (info function inline-expansion name) inline-expansion))
296     name)
297     ;;;
298     (defun c::%defun (name def doc source)
299     (declare (ignore source))
300 ram 1.3 (assert (eval:interpreted-function-p def))
301     (setf (eval:interpreted-function-name def) name)
302 ram 1.1 (c::%%defun name def doc))
303    
304    
305     ;;; DEFCONSTANT -- Public
306     ;;;
307     (defmacro defconstant (var val &optional doc)
308     "For defining global constants at top level. The DEFCONSTANT says that the
309     value is constant and may be compiled into code. If the variable already has
310     a value, and this is not equal to the init, an error is signalled. The third
311     argument is an optional documentation string for the variable."
312     `(c::%defconstant ',var ,val ',doc))
313    
314     ;;; %Defconstant, %%Defconstant -- Internal
315     ;;;
316     ;;; Like the other %mumbles except that we currently actually do something
317     ;;; interesting at load time, namely checking if the constant is being
318     ;;; redefined.
319     ;;;
320     (defun c::%defconstant (name value doc)
321     (c::%%defconstant name value doc))
322     ;;;
323     (defun c::%%defconstant (name value doc)
324     (when doc
325     (setf (documentation name 'variable) doc))
326     (when (boundp name)
327     (unless (equalp (symbol-value name) value)
328     (cerror "Go ahead and change the value."
329     "Constant ~S being redefined." name)))
330     (setf (symbol-value name) value)
331     (setf (info variable kind name) :constant)
332     (clear-info variable constant-value name)
333     name)
334    
335    
336     (defmacro defvar (var &optional (val nil valp) (doc nil docp))
337     "For defining global variables at top level. Declares the variable
338     SPECIAL and, optionally, initializes it. If the variable already has a
339     value, the old value is not clobbered. The third argument is an optional
340     documentation string for the variable."
341     `(progn
342     (proclaim '(special ,var))
343     ,@(when valp
344     `((unless (boundp ',var)
345     (setq ,var ,val))))
346     ,@(when docp
347     `((setf (documentation ',var 'variable) ',doc)))
348     ',var))
349    
350     (defmacro defparameter (var val &optional (doc nil docp))
351     "Defines a parameter that is not normally changed by the program,
352     but that may be changed without causing an error. Declares the
353     variable special and sets its value to VAL. The third argument is
354     an optional documentation string for the parameter."
355     `(progn
356     (proclaim '(special ,var))
357     (setq ,var ,val)
358     ,@(when docp
359     `((setf (documentation ',var 'variable) ',doc)))
360     ',var))
361    
362    
363     ;;;; ASSORTED CONTROL STRUCTURES
364    
365    
366     (defmacro when (test &body forms)
367     "First arg is a predicate. If it is non-null, the rest of the forms are
368     evaluated as a PROGN."
369     `(cond (,test nil ,@forms)))
370    
371     (defmacro unless (test &rest forms)
372     "First arg is a predicate. If it is null, the rest of the forms are
373     evaluated as a PROGN."
374     `(cond ((not ,test) nil ,@forms)))
375    
376    
377     (defmacro return (&optional (value nil))
378     `(return-from nil ,value))
379    
380     (defmacro prog (varlist &body (body decls))
381     `(block nil
382     (let ,varlist
383     ,@decls
384     (tagbody ,@body))))
385    
386     (defmacro prog* (varlist &body (body decls))
387     `(block nil
388     (let* ,varlist
389     ,@decls
390     (tagbody ,@body))))
391    
392    
393     ;;; Prog1, Prog2 -- Public
394     ;;;
395     ;;; These just turn into a Let.
396     ;;;
397     (defmacro prog1 (result &rest body)
398     (let ((n-result (gensym)))
399     `(let ((,n-result ,result))
400     ,@body
401     ,n-result)))
402     ;;;
403     (defmacro prog2 (form1 result &rest body)
404     `(prog1 (progn ,form1 ,result) ,@body))
405    
406    
407     ;;; And, Or -- Public
408     ;;;
409     ;;; AND and OR are defined in terms of IF.
410     ;;;
411     (defmacro and (&rest forms)
412     (cond ((endp forms) t)
413     ((endp (rest forms)) (first forms))
414     (t
415     `(if ,(first forms)
416     (and ,@(rest forms))
417     nil))))
418     ;;;
419     (defmacro or (&rest forms)
420     (cond ((endp forms) nil)
421     ((endp (rest forms)) (first forms))
422     (t
423     (let ((n-result (gensym)))
424     `(let ((,n-result ,(first forms)))
425     (if ,n-result
426     ,n-result
427     (or ,@(rest forms))))))))
428    
429    
430     ;;; Cond -- Public
431     ;;;
432     ;;; COND also turns into IF.
433     ;;;
434     (defmacro cond (&rest clauses)
435     (if (endp clauses)
436     nil
437     (let ((clause (first clauses)))
438     (when (atom clause)
439     (error "Cond clause is not a list: ~S." clause))
440     (let ((test (first clause))
441     (forms (rest clause)))
442     (if (endp forms)
443     (let ((n-result (gensym)))
444     `(let ((,n-result ,test))
445     (if ,n-result
446     ,n-result
447     (cond ,@(rest clauses)))))
448     `(if ,test
449     (progn ,@forms)
450     (cond ,@(rest clauses))))))))
451    
452    
453     ;;;; Multiple value macros:
454    
455     ;;; Multiple-Value-XXX -- Public
456     ;;;
457     ;;; All the multiple-value receiving forms are defined in terms of
458     ;;; Multiple-Value-Call.
459     ;;;
460     (defmacro multiple-value-setq (varlist value-form)
461     (unless (and (listp varlist) (every #'symbolp varlist))
462     (error "Varlist is not a list of symbols: ~S." varlist))
463     (let ((temps (mapcar #'(lambda (x) (declare (ignore x)) (gensym)) varlist)))
464     `(multiple-value-bind ,temps ,value-form
465     ,@(mapcar #'(lambda (var temp)
466     `(setq ,var ,temp))
467     varlist temps)
468     ,(car temps))))
469     ;;;
470     (defmacro multiple-value-bind (varlist value-form &body body)
471     (unless (and (listp varlist) (every #'symbolp varlist))
472     (error "Varlist is not a list of symbols: ~S." varlist))
473     (if (= (length varlist) 1)
474     `(let ((,(car varlist) ,value-form))
475     ,@body)
476     (let ((ignore (gensym)))
477     `(multiple-value-call #'(lambda (&optional ,@varlist &rest ,ignore)
478     (declare (ignore ,ignore))
479     ,@body)
480     ,value-form))))
481     ;;;
482     (defmacro multiple-value-list (value-form)
483     `(multiple-value-call #'list ,value-form))
484 ram 1.18
485    
486     (defmacro nth-value (n form)
487     "Evaluates FORM and returns the Nth value (zero based). This involves no
488     consing when N is a trivial constant integer."
489     (if (integerp n)
490     (let ((dummy-list nil)
491 wlott 1.30 (keeper (gensym "KEEPER-")))
492 ram 1.26 ;; We build DUMMY-LIST, a list of variables to bind to useless
493     ;; values, then we explicitly IGNORE those bindings and return
494 wlott 1.30 ;; KEEPER, the only thing we're really interested in right now.
495 ram 1.26 (dotimes (i n)
496 wlott 1.30 (push (gensym "IGNORE-") dummy-list))
497     `(multiple-value-bind (,@dummy-list ,keeper)
498 ram 1.26 ,form
499     (declare (ignore ,@dummy-list))
500 wlott 1.30 ,keeper))
501     (once-only ((n n))
502     `(case (the fixnum ,n)
503     (0 (nth-value 0 ,form))
504     (1 (nth-value 1 ,form))
505     (2 (nth-value 2 ,form))
506     (T (nth (the fixnum ,n) (multiple-value-list ,form)))))))
507 ram 1.1
508    
509     ;;;; SETF and friends.
510    
511     ;;; Note: The expansions for SETF and friends sometimes create needless
512     ;;; LET-bindings of argument values. The compiler will remove most of
513     ;;; these spurious bindings, so SETF doesn't worry too much about creating
514     ;;; them.
515    
516     ;;; The inverse for a generalized-variable reference function is stored in
517     ;;; one of two ways:
518     ;;;
519 ram 1.38 ;;; A SETF inverse property corresponds to the short form of DEFSETF. It is
520 ram 1.1 ;;; the name of a function takes the same args as the reference form, plus a
521     ;;; new-value arg at the end.
522     ;;;
523 ram 1.38 ;;; A SETF method expander is created by the long form of DEFSETF or
524 ram 1.1 ;;; by DEFINE-SETF-METHOD. It is a function that is called on the reference
525     ;;; form and that produces five values: a list of temporary variables, a list
526     ;;; of value forms, a list of the single store-value form, a storing function,
527     ;;; and an accessing function.
528    
529 ram 1.39 (defun get-setf-expansion (form &optional environment)
530 ram 1.1 "Returns five values needed by the SETF machinery: a list of temporary
531 wlott 1.29 variables, a list of values with which to fill them, a list of temporaries
532     for the new values, the setting function, and the accessing function."
533 ram 1.1 (let (temp)
534     (cond ((symbolp form)
535 wlott 1.32 (multiple-value-bind
536     (expansion expanded)
537     (macroexpand-1 form environment)
538     (if expanded
539 ram 1.39 (get-setf-expansion expansion environment)
540 wlott 1.32 (let ((new-var (gensym)))
541     (values nil nil (list new-var)
542     `(setq ,form ,new-var) form)))))
543 ram 1.25 ;;
544     ;; Local functions inhibit global setf methods...
545 ram 1.22 ((and environment
546 ram 1.36 (let ((name (car form)))
547     (dolist (x (c::lexenv-functions environment) nil)
548     (when (and (eq (car x) name)
549     (not (c::defined-function-p (cdr x))))
550     (return t)))))
551 ram 1.38 (expand-or-get-setf-inverse form environment))
552 ram 1.1 ((setq temp (info setf inverse (car form)))
553 wlott 1.10 (get-setf-method-inverse form `(,temp) nil))
554 ram 1.1 ((setq temp (info setf expander (car form)))
555     (funcall temp form environment))
556     (t
557 ram 1.38 (expand-or-get-setf-inverse form environment)))))
558    
559 ram 1.39 (defun get-setf-method-multiple-value (form &optional env)
560     "Obsolete: use GET-SETF-EXPANSION."
561     (get-setf-expansion form env))
562 ram 1.38
563     ;;;
564     ;;; If a macro, expand one level and try again. If not, go for the
565     ;;; SETF function.
566     (defun expand-or-get-setf-inverse (form environment)
567     (multiple-value-bind
568     (expansion expanded)
569     (macroexpand-1 form environment)
570     (if expanded
571 ram 1.39 (get-setf-expansion expansion environment)
572 ram 1.38 (get-setf-method-inverse form `(funcall #'(setf ,(car form)))
573     t))))
574    
575 ram 1.1
576 wlott 1.10 (defun get-setf-method-inverse (form inverse setf-function)
577 ram 1.1 (let ((new-var (gensym))
578     (vars nil)
579     (vals nil))
580     (dolist (x (cdr form))
581     (push (gensym) vars)
582     (push x vals))
583     (setq vals (nreverse vals))
584     (values vars vals (list new-var)
585 wlott 1.10 (if setf-function
586     `(,@inverse ,new-var ,@vars)
587     `(,@inverse ,@vars ,new-var))
588 ram 1.1 `(,(car form) ,@vars))))
589    
590    
591 wlott 1.29 (defun get-setf-method (form &optional environment)
592 ram 1.39 "Obsolete: use GET-SETF-EXPANSION and handle multiple store values."
593 wlott 1.29 (multiple-value-bind
594     (temps value-forms store-vars store-form access-form)
595 ram 1.39 (get-setf-expansion form environment)
596 wlott 1.29 (when (cdr store-vars)
597     (error "GET-SETF-METHOD used for a form with multiple store ~
598     variables:~% ~S" form))
599     (values temps value-forms store-vars store-form access-form)))
600 ram 1.1
601 wlott 1.29
602 wlott 1.16 (defun defsetter (fn rest)
603 wlott 1.14 (let ((arglist (car rest))
604     (arglist-var (gensym "ARGS-"))
605     (new-var (car (cadr rest))))
606     (multiple-value-bind
607     (body local-decs doc)
608 wlott 1.16 (parse-defmacro arglist arglist-var (cddr rest) fn 'defsetf)
609 ram 1.1 (values
610 wlott 1.14 `(lambda (,arglist-var ,new-var)
611     ,@local-decs
612 wlott 1.16 ,body)
613 wlott 1.15 doc))))
614 ram 1.1
615    
616 wlott 1.16 (defmacro defsetf (access-fn &rest rest)
617 ram 1.1 "Associates a SETF update function or macro with the specified access
618     function or macro. The format is complex. See the manual for
619     details."
620     (cond ((not (listp (car rest)))
621     `(eval-when (load compile eval)
622 ram 1.22 (%define-setf-macro ',access-fn nil ',(car rest)
623     ,(when (and (car rest) (stringp (cadr rest)))
624     `',(cadr rest)))))
625 wlott 1.29 ((and (cdr rest) (listp (cadr rest)))
626     (destructuring-bind
627     (lambda-list (&rest store-variables) &body body)
628     rest
629     (let ((arglist-var (gensym "ARGS-"))
630     (access-form-var (gensym "ACCESS-FORM-"))
631     (env-var (gensym "ENVIRONMENT-")))
632     (multiple-value-bind
633     (body local-decs doc)
634     (parse-defmacro `(,lambda-list ,@store-variables)
635     arglist-var body access-fn 'defsetf
636     :annonymousp t)
637     `(eval-when (load compile eval)
638     (%define-setf-macro
639     ',access-fn
640     #'(lambda (,access-form-var ,env-var)
641     (declare (ignore ,env-var))
642     (%defsetf ,access-form-var ,(length store-variables)
643     #'(lambda (,arglist-var)
644     ,@local-decs
645     (block ,access-fn
646     ,body))))
647     nil
648     ',doc))))))
649     (t
650     (error "Ill-formed DEFSETF for ~S." access-fn))))
651 ram 1.1
652 wlott 1.29 (defun %defsetf (orig-access-form num-store-vars expander)
653 wlott 1.34 (collect ((subforms) (subform-vars) (subform-exprs) (store-vars))
654     (dolist (subform (cdr orig-access-form))
655     (if (constantp subform)
656     (subforms subform)
657     (let ((var (gensym)))
658     (subforms var)
659     (subform-vars var)
660     (subform-exprs subform))))
661     (dotimes (i num-store-vars)
662     (store-vars (gensym)))
663     (values (subform-vars)
664     (subform-exprs)
665     (store-vars)
666     (funcall expander (cons (subforms) (store-vars)))
667     `(,(car orig-access-form) ,@(subforms)))))
668 wlott 1.29
669    
670 ram 1.23 ;;; SETF -- Public
671     ;;;
672     ;;; Except for atoms, we always call GET-SETF-METHOD, since it has some
673     ;;; non-trivial semantics. But when there is a setf inverse, and G-S-M uses
674     ;;; it, then we return a call to the inverse, rather than returning a hairy let
675     ;;; form. This is probably important mainly as a convenince in allowing the
676     ;;; use of setf inverses without the full interpreter.
677     ;;;
678 ram 1.1 (defmacro setf (&rest args &environment env)
679     "Takes pairs of arguments like SETQ. The first is a place and the second
680     is the value that is supposed to go into that place. Returns the last
681     value. The place argument may be any of the access forms for which SETF
682     knows a corresponding setting form."
683 ram 1.22 (let ((nargs (length args)))
684     (cond
685     ((= nargs 2)
686 ram 1.23 (let ((place (first args))
687     (value-form (second args)))
688     (if (atom place)
689     `(setq ,place ,value-form)
690     (multiple-value-bind (dummies vals newval setter getter)
691 ram 1.39 (get-setf-expansion place env)
692 ram 1.23 (declare (ignore getter))
693     (let ((inverse (info setf inverse (car place))))
694     (if (and inverse (eq inverse (car setter)))
695     `(,inverse ,@(cdr place) ,value-form)
696 wlott 1.29 `(let* (,@(mapcar #'list dummies vals))
697     (multiple-value-bind ,newval ,value-form
698     ,setter))))))))
699 ram 1.22 ((oddp nargs)
700     (error "Odd number of args to SETF."))
701     (t
702     (do ((a args (cddr a)) (l nil))
703     ((null a) `(progn ,@(nreverse l)))
704     (setq l (cons (list 'setf (car a) (cadr a)) l)))))))
705 ram 1.1
706     (defmacro psetf (&rest args &environment env)
707     "This is to SETF as PSETQ is to SETQ. Args are alternating place
708     expressions and values to go into those places. All of the subforms and
709     values are determined, left to right, and only then are the locations
710     updated. Returns NIL."
711 wlott 1.29 (collect ((let*-bindings) (mv-bindings) (setters))
712     (do ((a args (cddr a)))
713     ((endp a))
714     (if (endp (cdr a))
715     (error "Odd number of args to PSETF."))
716     (multiple-value-bind
717     (dummies vals newval setter getter)
718 ram 1.39 (get-setf-expansion (car a) env)
719 wlott 1.29 (declare (ignore getter))
720     (let*-bindings (mapcar #'list dummies vals))
721     (mv-bindings (list newval (cadr a)))
722     (setters setter)))
723     (labels ((thunk (let*-bindings mv-bindings)
724     (if let*-bindings
725     `(let* ,(car let*-bindings)
726     (multiple-value-bind ,@(car mv-bindings)
727     ,(thunk (cdr let*-bindings) (cdr mv-bindings))))
728     `(progn ,@(setters) nil))))
729     (thunk (let*-bindings) (mv-bindings)))))
730 ram 1.1
731    
732     (defmacro shiftf (&rest args &environment env)
733     "One or more SETF-style place expressions, followed by a single
734 wlott 1.29 value expression. Evaluates all of the expressions in turn, then
735     assigns the value of each expression to the place on its left,
736     returning the value of the leftmost."
737 ram 1.1 (if (< (length args) 2)
738     (error "Too few argument forms to a SHIFTF."))
739 wlott 1.29 (collect ((let*-bindings) (forms))
740     (do ((first t nil)
741     (a args (cdr a))
742     (prev-store-vars)
743     (prev-setter))
744     ((endp (cdr a))
745     (forms `(multiple-value-bind ,prev-store-vars ,(car a)
746     ,prev-setter)))
747     (multiple-value-bind
748     (temps exprs store-vars setter getter)
749 ram 1.39 (get-setf-expansion (car a) env)
750 wlott 1.29 (loop
751     for temp in temps
752     for expr in exprs
753     do (let*-bindings `(,temp ,expr)))
754     (forms (if first
755     getter
756     `(multiple-value-bind ,prev-store-vars ,getter
757     ,prev-setter)))
758     (setf prev-store-vars store-vars)
759     (setf prev-setter setter)))
760     `(let* ,(let*-bindings)
761     (multiple-value-prog1
762     ,@(forms)))))
763 ram 1.1
764     (defmacro rotatef (&rest args &environment env)
765     "Takes any number of SETF-style place expressions. Evaluates all of the
766 wlott 1.29 expressions in turn, then assigns to each place the value of the form to
767     its right. The rightmost form gets the value of the leftmost.
768     Returns NIL."
769     (when args
770     (collect ((let*-bindings) (mv-bindings) (setters) (getters))
771     (dolist (arg args)
772     (multiple-value-bind
773     (temps subforms store-vars setter getter)
774 ram 1.39 (get-setf-expansion arg env)
775 wlott 1.29 (loop
776     for temp in temps
777     for subform in subforms
778     do (let*-bindings `(,temp ,subform)))
779     (mv-bindings store-vars)
780     (setters setter)
781     (getters getter)))
782     (setters nil)
783     (getters (car (getters)))
784     (labels ((thunk (mv-bindings getters)
785     (if mv-bindings
786     `((multiple-value-bind
787     ,(car mv-bindings)
788     ,(car getters)
789     ,@(thunk (cdr mv-bindings) (cdr getters))))
790     (setters))))
791     `(let* ,(let*-bindings)
792     ,@(thunk (mv-bindings) (cdr (getters))))))))
793 ram 1.1
794    
795     (defmacro define-modify-macro (name lambda-list function &optional doc-string)
796     "Creates a new read-modify-write macro like PUSH or INCF."
797     (let ((other-args nil)
798     (rest-arg nil)
799     (env (gensym))
800     (reference (gensym)))
801    
802     ;; Parse out the variable names and rest arg from the lambda list.
803     (do ((ll lambda-list (cdr ll))
804     (arg nil))
805     ((null ll))
806     (setq arg (car ll))
807     (cond ((eq arg '&optional))
808     ((eq arg '&rest)
809     (if (symbolp (cadr ll))
810     (setq rest-arg (cadr ll))
811     (error "Non-symbol &rest arg in definition of ~S." name))
812     (if (null (cddr ll))
813     (return nil)
814     (error "Illegal stuff after &rest arg in Define-Modify-Macro.")))
815     ((memq arg '(&key &allow-other-keys &aux))
816     (error "~S not allowed in Define-Modify-Macro lambda list." arg))
817     ((symbolp arg)
818     (push arg other-args))
819     ((and (listp arg) (symbolp (car arg)))
820     (push (car arg) other-args))
821     (t (error "Illegal stuff in lambda list of Define-Modify-Macro."))))
822     (setq other-args (nreverse other-args))
823     `(defmacro ,name (,reference ,@lambda-list &environment ,env)
824     ,doc-string
825     (multiple-value-bind (dummies vals newval setter getter)
826 wlott 1.13 (get-setf-method ,reference ,env)
827 ram 1.1 (do ((d dummies (cdr d))
828     (v vals (cdr v))
829     (let-list nil (cons (list (car d) (car v)) let-list)))
830     ((null d)
831     (push
832     (list (car newval)
833     ,(if rest-arg
834     `(list* ',function getter ,@other-args ,rest-arg)
835     `(list ',function getter ,@other-args)))
836     let-list)
837     `(let* ,(nreverse let-list)
838     ,setter)))))))
839    
840    
841    
842     (defmacro push (obj place &environment env)
843     "Takes an object and a location holding a list. Conses the object onto
844     the list, returning the modified list."
845     (if (symbolp place)
846     `(setq ,place (cons ,obj ,place))
847     (multiple-value-bind (dummies vals newval setter getter)
848 wlott 1.13 (get-setf-method place env)
849 ram 1.1 (do* ((d dummies (cdr d))
850     (v vals (cdr v))
851     (let-list nil))
852     ((null d)
853     (push (list (car newval) `(cons ,obj ,getter))
854     let-list)
855     `(let* ,(nreverse let-list)
856     ,setter))
857     (push (list (car d) (car v)) let-list)))))
858    
859    
860     (defmacro pushnew (obj place &rest keys &environment env)
861     "Takes an object and a location holding a list. If the object is already
862     in the list, does nothing. Else, conses the object onto the list. Returns
863     NIL. If there is a :TEST keyword, this is used for the comparison."
864     (if (symbolp place)
865     `(setq ,place (adjoin ,obj ,place ,@keys))
866     (multiple-value-bind (dummies vals newval setter getter)
867 wlott 1.13 (get-setf-method place env)
868 ram 1.1 (do* ((d dummies (cdr d))
869     (v vals (cdr v))
870     (let-list nil))
871     ((null d)
872     (push (list (car newval) `(adjoin ,obj ,getter ,@keys))
873     let-list)
874     `(let* ,(nreverse let-list)
875     ,setter))
876     (push (list (car d) (car v)) let-list)))))
877    
878    
879     (defmacro pop (place &environment env)
880     "The argument is a location holding a list. Pops one item off the front
881     of the list and returns it."
882     (if (symbolp place)
883     `(prog1 (car ,place) (setq ,place (cdr ,place)))
884     (multiple-value-bind (dummies vals newval setter getter)
885 wlott 1.13 (get-setf-method place env)
886 ram 1.1 (do* ((d dummies (cdr d))
887     (v vals (cdr v))
888     (let-list nil))
889     ((null d)
890     (push (list (car newval) getter) let-list)
891     `(let* ,(nreverse let-list)
892     (prog1 (car ,(car newval))
893     (setq ,(car newval) (cdr ,(car newval)))
894     ,setter)))
895     (push (list (car d) (car v)) let-list)))))
896    
897    
898     (define-modify-macro incf (&optional (delta 1)) +
899     "The first argument is some location holding a number. This number is
900     incremented by the second argument, DELTA, which defaults to 1.")
901    
902    
903     (define-modify-macro decf (&optional (delta 1)) -
904     "The first argument is some location holding a number. This number is
905     decremented by the second argument, DELTA, which defaults to 1.")
906    
907    
908     (defmacro remf (place indicator &environment env)
909     "Place may be any place expression acceptable to SETF, and is expected
910     to hold a property list or (). This list is destructively altered to
911     remove the property specified by the indicator. Returns T if such a
912     property was present, NIL if not."
913     (multiple-value-bind (dummies vals newval setter getter)
914 wlott 1.13 (get-setf-method place env)
915 ram 1.1 (do* ((d dummies (cdr d))
916     (v vals (cdr v))
917     (let-list nil)
918     (ind-temp (gensym))
919     (local1 (gensym))
920     (local2 (gensym)))
921     ((null d)
922     (push (list (car newval) getter) let-list)
923     (push (list ind-temp indicator) let-list)
924     `(let* ,(nreverse let-list)
925     (do ((,local1 ,(car newval) (cddr ,local1))
926     (,local2 nil ,local1))
927     ((atom ,local1) nil)
928     (cond ((atom (cdr ,local1))
929     (error "Odd-length property list in REMF."))
930     ((eq (car ,local1) ,ind-temp)
931     (cond (,local2
932     (rplacd (cdr ,local2) (cddr ,local1))
933     (return t))
934     (t (setq ,(car newval) (cddr ,(car newval)))
935     ,setter
936     (return t))))))))
937     (push (list (car d) (car v)) let-list))))
938    
939    
940     ;;; The built-in DEFSETFs.
941    
942     (defsetf car %rplaca)
943     (defsetf cdr %rplacd)
944     (defsetf caar (x) (v) `(%rplaca (car ,x) ,v))
945     (defsetf cadr (x) (v) `(%rplaca (cdr ,x) ,v))
946     (defsetf cdar (x) (v) `(%rplacd (car ,x) ,v))
947     (defsetf cddr (x) (v) `(%rplacd (cdr ,x) ,v))
948     (defsetf caaar (x) (v) `(%rplaca (caar ,x) ,v))
949     (defsetf cadar (x) (v) `(%rplaca (cdar ,x) ,v))
950     (defsetf cdaar (x) (v) `(%rplacd (caar ,x) ,v))
951     (defsetf cddar (x) (v) `(%rplacd (cdar ,x) ,v))
952     (defsetf caadr (x) (v) `(%rplaca (cadr ,x) ,v))
953     (defsetf caddr (x) (v) `(%rplaca (cddr ,x) ,v))
954     (defsetf cdadr (x) (v) `(%rplacd (cadr ,x) ,v))
955     (defsetf cdddr (x) (v) `(%rplacd (cddr ,x) ,v))
956     (defsetf caaaar (x) (v) `(%rplaca (caaar ,x) ,v))
957     (defsetf cadaar (x) (v) `(%rplaca (cdaar ,x) ,v))
958     (defsetf cdaaar (x) (v) `(%rplacd (caaar ,x) ,v))
959     (defsetf cddaar (x) (v) `(%rplacd (cdaar ,x) ,v))
960     (defsetf caadar (x) (v) `(%rplaca (cadar ,x) ,v))
961     (defsetf caddar (x) (v) `(%rplaca (cddar ,x) ,v))
962     (defsetf cdadar (x) (v) `(%rplacd (cadar ,x) ,v))
963     (defsetf cdddar (x) (v) `(%rplacd (cddar ,x) ,v))
964     (defsetf caaadr (x) (v) `(%rplaca (caadr ,x) ,v))
965     (defsetf cadadr (x) (v) `(%rplaca (cdadr ,x) ,v))
966     (defsetf cdaadr (x) (v) `(%rplacd (caadr ,x) ,v))
967     (defsetf cddadr (x) (v) `(%rplacd (cdadr ,x) ,v))
968     (defsetf caaddr (x) (v) `(%rplaca (caddr ,x) ,v))
969     (defsetf cadddr (x) (v) `(%rplaca (cdddr ,x) ,v))
970     (defsetf cdaddr (x) (v) `(%rplacd (caddr ,x) ,v))
971     (defsetf cddddr (x) (v) `(%rplacd (cdddr ,x) ,v))
972    
973     (defsetf first %rplaca)
974     (defsetf second (x) (v) `(%rplaca (cdr ,x) ,v))
975     (defsetf third (x) (v) `(%rplaca (cddr ,x) ,v))
976     (defsetf fourth (x) (v) `(%rplaca (cdddr ,x) ,v))
977     (defsetf fifth (x) (v) `(%rplaca (cddddr ,x) ,v))
978     (defsetf sixth (x) (v) `(%rplaca (cdr (cddddr ,x)) ,v))
979     (defsetf seventh (x) (v) `(%rplaca (cddr (cddddr ,x)) ,v))
980     (defsetf eighth (x) (v) `(%rplaca (cdddr (cddddr ,x)) ,v))
981     (defsetf ninth (x) (v) `(%rplaca (cddddr (cddddr ,x)) ,v))
982     (defsetf tenth (x) (v) `(%rplaca (cdr (cddddr (cddddr ,x))) ,v))
983     (defsetf rest %rplacd)
984    
985     (defsetf elt %setelt)
986     (defsetf aref %aset)
987 wlott 1.10 (defsetf row-major-aref %set-row-major-aref)
988 ram 1.1 (defsetf svref %svset)
989     (defsetf char %charset)
990     (defsetf bit %bitset)
991     (defsetf schar %scharset)
992     (defsetf sbit %sbitset)
993 wlott 1.10 (defsetf %array-dimension %set-array-dimension)
994     (defsetf %raw-bits %set-raw-bits)
995 ram 1.1 (defsetf symbol-value set)
996 wlott 1.28 (defsetf symbol-function fset)
997     (defsetf symbol-plist %set-symbol-plist)
998 ram 1.1 (defsetf documentation %set-documentation)
999     (defsetf nth %setnth)
1000     (defsetf fill-pointer %set-fill-pointer)
1001     (defsetf search-list %set-search-list)
1002    
1003 wlott 1.10 (defsetf sap-ref-8 %set-sap-ref-8)
1004 wlott 1.27 (defsetf signed-sap-ref-8 %set-signed-sap-ref-8)
1005 wlott 1.10 (defsetf sap-ref-16 %set-sap-ref-16)
1006 wlott 1.27 (defsetf signed-sap-ref-16 %set-signed-sap-ref-16)
1007 wlott 1.10 (defsetf sap-ref-32 %set-sap-ref-32)
1008 wlott 1.27 (defsetf signed-sap-ref-32 %set-signed-sap-ref-32)
1009 wlott 1.10 (defsetf sap-ref-sap %set-sap-ref-sap)
1010     (defsetf sap-ref-single %set-sap-ref-single)
1011     (defsetf sap-ref-double %set-sap-ref-double)
1012 ram 1.1
1013     (define-setf-method getf (place prop &optional default &environment env)
1014     (multiple-value-bind (temps values stores set get)
1015 wlott 1.13 (get-setf-method place env)
1016 ram 1.1 (let ((newval (gensym))
1017     (ptemp (gensym))
1018 wlott 1.31 (def-temp (if default (gensym))))
1019     (values `(,@temps ,ptemp ,@(if default `(,def-temp)))
1020     `(,@values ,prop ,@(if default `(,default)))
1021 ram 1.1 `(,newval)
1022 wlott 1.31 `(let ((,(car stores) (%putf ,get ,ptemp ,newval)))
1023     ,set
1024     ,newval)
1025     `(getf ,get ,ptemp ,@(if default `(,def-temp)))))))
1026 ram 1.1
1027     (define-setf-method get (symbol prop &optional default)
1028     (let ((symbol-temp (gensym))
1029     (prop-temp (gensym))
1030     (def-temp (gensym))
1031     (newval (gensym)))
1032     (values `(,symbol-temp ,prop-temp ,@(if default `(,def-temp)))
1033     `(,symbol ,prop ,@(if default `(,default)))
1034     (list newval)
1035     `(%put ,symbol-temp ,prop-temp ,newval)
1036     `(get ,symbol-temp ,prop-temp ,@(if default `(,def-temp))))))
1037    
1038     (define-setf-method gethash (key hashtable &optional default)
1039     (let ((key-temp (gensym))
1040     (hashtable-temp (gensym))
1041     (default-temp (gensym))
1042     (new-value-temp (gensym)))
1043     (values
1044     `(,key-temp ,hashtable-temp ,@(if default `(,default-temp)))
1045     `(,key ,hashtable ,@(if default `(,default)))
1046     `(,new-value-temp)
1047     `(%puthash ,key-temp ,hashtable-temp ,new-value-temp)
1048     `(gethash ,key-temp ,hashtable-temp ,@(if default `(,default-temp))))))
1049    
1050     (defsetf subseq (sequence start &optional (end nil)) (v)
1051     `(progn (replace ,sequence ,v :start1 ,start :end1 ,end)
1052     ,v))
1053    
1054    
1055 ram 1.36 ;;; Evil hack invented by the gnomes of Vassar Street (though not as evil as
1056     ;;; it used to be.) The function arg must be constant, and is converted to an
1057     ;;; APPLY of ther SETF function, which ought to exist.
1058 ram 1.22 ;;;
1059 ram 1.36 (define-setf-method apply (function &rest args)
1060 ram 1.22 (unless (and (listp function)
1061     (= (list-length function) 2)
1062     (eq (first function) 'function)
1063     (symbolp (second function)))
1064     (error "Setf of Apply is only defined for function args like #'symbol."))
1065 ram 1.36 (let ((function (second function))
1066     (new-var (gensym))
1067     (vars nil))
1068     (dolist (x args)
1069     (declare (ignore x))
1070     (push (gensym) vars))
1071     (values vars args (list new-var)
1072     `(apply #'(setf ,function) ,new-var ,@vars)
1073     `(apply #',function ,@vars))))
1074 ram 1.1
1075    
1076 wlott 1.10 ;;; Special-case a BYTE bytespec so that the compiler can recognize it.
1077     ;;;
1078 ram 1.1 (define-setf-method ldb (bytespec place &environment env)
1079     "The first argument is a byte specifier. The second is any place form
1080     acceptable to SETF. Replaces the specified byte of the number in this
1081     place with bits from the low-order end of the new value."
1082     (multiple-value-bind (dummies vals newval setter getter)
1083 wlott 1.13 (get-setf-method place env)
1084 wlott 1.10 (if (and (consp bytespec) (eq (car bytespec) 'byte))
1085     (let ((n-size (gensym))
1086     (n-pos (gensym))
1087     (n-new (gensym)))
1088     (values (list* n-size n-pos dummies)
1089     (list* (second bytespec) (third bytespec) vals)
1090     (list n-new)
1091     `(let ((,(car newval) (dpb ,n-new (byte ,n-size ,n-pos)
1092     ,getter)))
1093     ,setter
1094     ,n-new)
1095     `(ldb (byte ,n-size ,n-pos) ,getter)))
1096     (let ((btemp (gensym))
1097     (gnuval (gensym)))
1098     (values (cons btemp dummies)
1099     (cons bytespec vals)
1100     (list gnuval)
1101     `(let ((,(car newval) (dpb ,gnuval ,btemp ,getter)))
1102     ,setter
1103     ,gnuval)
1104     `(ldb ,btemp ,getter))))))
1105 ram 1.1
1106    
1107     (define-setf-method mask-field (bytespec place &environment env)
1108     "The first argument is a byte specifier. The second is any place form
1109     acceptable to SETF. Replaces the specified byte of the number in this place
1110     with bits from the corresponding position in the new value."
1111     (multiple-value-bind (dummies vals newval setter getter)
1112 wlott 1.13 (get-setf-method place env)
1113 ram 1.1 (let ((btemp (gensym))
1114     (gnuval (gensym)))
1115     (values (cons btemp dummies)
1116     (cons bytespec vals)
1117     (list gnuval)
1118     `(let ((,(car newval) (deposit-field ,gnuval ,btemp ,getter)))
1119     ,setter
1120     ,gnuval)
1121     `(mask-field ,btemp ,getter)))))
1122    
1123    
1124     (define-setf-method the (type place &environment env)
1125     (multiple-value-bind (dummies vals newval setter getter)
1126 wlott 1.13 (get-setf-method place env)
1127 ram 1.1 (values dummies
1128     vals
1129     newval
1130     (subst `(the ,type ,(car newval)) (car newval) setter)
1131     `(the ,type ,getter))))
1132    
1133    
1134     ;;;; CASE, TYPECASE, & Friends.
1135    
1136     (eval-when (compile load eval)
1137    
1138     ;;; CASE-BODY returns code for all the standard "case" macros. Name is the
1139     ;;; macro name, and keyform is the thing to case on. Multi-p indicates whether
1140     ;;; a branch may fire off a list of keys; otherwise, a key that is a list is
1141     ;;; interpreted in some way as a single key. When multi-p, test is applied to
1142     ;;; the value of keyform and each key for a given branch; otherwise, test is
1143     ;;; applied to the value of keyform and the entire first element, instead of
1144     ;;; each part, of the case branch. When errorp, no t or otherwise branch is
1145     ;;; permitted, and an ERROR form is generated. When proceedp, it is an error
1146     ;;; to omit errorp, and the ERROR form generated is executed within a
1147     ;;; RESTART-CASE allowing keyform to be set and retested.
1148     ;;;
1149     (defun case-body (name keyform cases multi-p test errorp proceedp)
1150     (let ((keyform-value (gensym))
1151     (clauses ())
1152     (keys ()))
1153     (dolist (case cases)
1154     (cond ((atom case)
1155     (error "~S -- Bad clause in ~S." case name))
1156     ((memq (car case) '(t otherwise))
1157     (if errorp
1158     (error "No default clause allowed in ~S: ~S" name case)
1159     (push `(t nil ,@(rest case)) clauses)))
1160     ((and multi-p (listp (first case)))
1161     (setf keys (append (first case) keys))
1162     (push `((or ,@(mapcar #'(lambda (key)
1163     `(,test ,keyform-value ',key))
1164     (first case)))
1165     nil ,@(rest case))
1166     clauses))
1167     (t
1168     (push (first case) keys)
1169     (push `((,test ,keyform-value
1170     ',(first case)) nil ,@(rest case)) clauses))))
1171     (case-body-aux name keyform keyform-value clauses keys errorp proceedp
1172     `(,(if multi-p 'member 'or) ,@keys))))
1173    
1174     ;;; CASE-BODY-AUX provides the expansion once CASE-BODY has groveled all the
1175     ;;; cases. Note: it is not necessary that the resulting code signal
1176     ;;; case-failure conditions, but that's what KMP's prototype code did. We call
1177     ;;; CASE-BODY-ERROR, because of how closures are compiled. RESTART-CASE has
1178     ;;; forms with closures that the compiler causes to be generated at the top of
1179     ;;; any function using the case macros, regardless of whether they are needed.
1180     ;;;
1181     (defun case-body-aux (name keyform keyform-value clauses keys
1182     errorp proceedp expected-type)
1183     (if proceedp
1184     (let ((block (gensym))
1185     (again (gensym)))
1186     `(let ((,keyform-value ,keyform))
1187     (block ,block
1188     (tagbody
1189     ,again
1190     (return-from
1191     ,block
1192     (cond ,@(nreverse clauses)
1193     (t
1194     (setf ,keyform-value
1195     (setf ,keyform
1196     (case-body-error
1197     ',name ',keyform ,keyform-value
1198     ',expected-type ',keys)))
1199     (go ,again))))))))
1200     `(let ((,keyform-value ,keyform))
1201     (cond
1202     ,@(nreverse clauses)
1203     ,@(if errorp
1204     `((t (error 'conditions::case-failure
1205     :name ',name
1206     :datum ,keyform-value
1207     :expected-type ',expected-type
1208     :possibilities ',keys))))))))
1209    
1210     ); eval-when
1211    
1212     (defun case-body-error (name keyform keyform-value expected-type keys)
1213     (restart-case
1214     (error 'conditions::case-failure
1215     :name name
1216     :datum keyform-value
1217     :expected-type expected-type
1218     :possibilities keys)
1219     (store-value (value)
1220     :report (lambda (stream)
1221     (format stream "Supply a new value for ~S." keyform))
1222     :interactive read-evaluated-form
1223     value)))
1224    
1225    
1226     (defmacro case (keyform &body cases)
1227     "CASE Keyform {({(Key*) | Key} Form*)}*
1228     Evaluates the Forms in the first clause with a Key EQL to the value of
1229     Keyform. If a singleton key is T then the clause is a default clause."
1230     (case-body 'case keyform cases t 'eql nil nil))
1231    
1232     (defmacro ccase (keyform &body cases)
1233     "CCASE Keyform {({(Key*) | Key} Form*)}*
1234     Evaluates the Forms in the first clause with a Key EQL to the value of
1235     Keyform. If none of the keys matches then a correctable error is
1236     signalled."
1237     (case-body 'ccase keyform cases t 'eql t t))
1238    
1239     (defmacro ecase (keyform &body cases)
1240     "ECASE Keyform {({(Key*) | Key} Form*)}*
1241     Evaluates the Forms in the first clause with a Key EQL to the value of
1242     Keyform. If none of the keys matches then an error is signalled."
1243     (case-body 'ecase keyform cases t 'eql t nil))
1244    
1245     (defmacro typecase (keyform &body cases)
1246     "TYPECASE Keyform {(Type Form*)}*
1247     Evaluates the Forms in the first clause for which TYPEP of Keyform and Type
1248     is true."
1249     (case-body 'typecase keyform cases nil 'typep nil nil))
1250    
1251     (defmacro ctypecase (keyform &body cases)
1252     "CTYPECASE Keyform {(Type Form*)}*
1253     Evaluates the Forms in the first clause for which TYPEP of Keyform and Type
1254     is true. If no form is satisfied then a correctable error is signalled."
1255     (case-body 'ctypecase keyform cases nil 'typep t t))
1256    
1257     (defmacro etypecase (keyform &body cases)
1258     "ETYPECASE Keyform {(Type Form*)}*
1259     Evaluates the Forms in the first clause for which TYPEP of Keyform and Type
1260     is true. If no form is satisfied then an error is signalled."
1261     (case-body 'etypecase keyform cases nil 'typep t nil))
1262    
1263    
1264     ;;;; ASSERT and CHECK-TYPE.
1265    
1266     ;;; ASSERT is written this way, to call ASSERT-ERROR, because of how closures
1267     ;;; are compiled. RESTART-CASE has forms with closures that the compiler
1268     ;;; causes to be generated at the top of any function using ASSERT, regardless
1269     ;;; of whether they are needed.
1270     ;;;
1271     (defmacro assert (test-form &optional places datum &rest arguments)
1272     "Signals an error if the value of test-form is nil. Continuing from this
1273     error using the CONTINUE restart will allow the user to alter the value of
1274     some locations known to SETF, starting over with test-form. Returns nil."
1275     `(loop
1276     (when ,test-form (return nil))
1277     (assert-error ',test-form ',places ,datum ,@arguments)
1278     ,@(mapcar #'(lambda (place)
1279     `(setf ,place (assert-prompt ',place ,place)))
1280     places)))
1281    
1282     (defun assert-error (test-form places datum &rest arguments)
1283 ram 1.41 (let ((cond (if datum
1284     (conditions::coerce-to-condition
1285     datum arguments
1286     'simple-error 'error)
1287     (make-condition 'simple-error
1288     :format-control "The assertion ~S failed."
1289     :format-arguments (list assertion)))))
1290     (restart-case (error cond)
1291 ram 1.1 (continue ()
1292     :report (lambda (stream) (assert-report places stream))
1293 ram 1.41 nil))))
1294 ram 1.1
1295    
1296     (defun assert-report (names stream)
1297     (format stream "Retry assertion")
1298     (if names
1299     (format stream " with new value~P for ~{~S~^, ~}."
1300     (length names) names)
1301     (format stream ".")))
1302    
1303     (defun assert-prompt (name value)
1304     (cond ((y-or-n-p "The old value of ~S is ~S.~
1305     ~%Do you want to supply a new value? "
1306     name value)
1307     (format *query-io* "~&Type a form to be evaluated:~%")
1308     (flet ((read-it () (eval (read *query-io*))))
1309     (if (symbolp name) ;help user debug lexical variables
1310     (progv (list name) (list value) (read-it))
1311     (read-it))))
1312     (t value)))
1313    
1314    
1315     ;;; CHECK-TYPE is written this way, to call CHECK-TYPE-ERROR, because of how
1316     ;;; closures are compiled. RESTART-CASE has forms with closures that the
1317     ;;; compiler causes to be generated at the top of any function using
1318     ;;; CHECK-TYPE, regardless of whether they are needed. Because it would be
1319     ;;; nice if this were cheap to use, and some things can't afford this excessive
1320     ;;; consing (e.g., READ-CHAR), we bend backwards a little.
1321     ;;;
1322    
1323     (defmacro check-type (place type &optional type-string)
1324     "Signals an error of type type-error if the contents of place are not of the
1325     specified type. If an error is signaled, this can only return if
1326     STORE-VALUE is invoked. It will store into place and start over."
1327     (let ((place-value (gensym)))
1328     `(loop
1329     (let ((,place-value ,place))
1330     (when (typep ,place-value ',type) (return nil))
1331     (setf ,place
1332     (check-type-error ',place ,place-value ',type ,type-string))))))
1333    
1334     (defun check-type-error (place place-value type type-string)
1335 ram 1.41 (let ((cond (if type-string
1336     (make-condition 'simple-type-error
1337     :datum place :expected-type type
1338     :format-control
1339     "The value of ~S is ~S, which is not ~A."
1340     :format-arguments
1341     (list place place-value type-string))
1342     (make-condition 'simple-type-error
1343     :datum place :expected-type type
1344     :format-control
1345     "The value of ~S is ~S, which is not of type ~S."
1346     :format-arguments
1347     (list place place-value type)))))
1348     (restart-case (error cond)
1349     (store-value (value)
1350     :report (lambda (stream)
1351     (format stream "Supply a new value of ~S."
1352     place))
1353     :interactive read-evaluated-form
1354     value))))
1355 ram 1.1
1356     ;;; READ-EVALUATED-FORM is used as the interactive method for restart cases
1357     ;;; setup by the Common Lisp "casing" (e.g., CCASE and CTYPECASE) macros
1358     ;;; and by CHECK-TYPE.
1359     ;;;
1360     (defun read-evaluated-form ()
1361     (format *query-io* "~&Type a form to be evaluated:~%")
1362     (list (eval (read *query-io*))))
1363    
1364    
1365     ;;;; With-XXX
1366    
1367     (defmacro with-open-file ((var &rest open-args) &body (forms decls))
1368 ram 1.5 "Bindspec is of the form (Stream File-Name . Options). The file whose
1369     name is File-Name is opened using the Options and bound to the variable
1370     Stream. If the call to open is unsuccessful, the forms are not
1371     evaluated. The Forms are executed, and when they terminate, normally or
1372     otherwise, the file is closed."
1373 ram 1.1 (let ((abortp (gensym)))
1374     `(let ((,var (open ,@open-args))
1375     (,abortp t))
1376     ,@decls
1377 ram 1.5 (when ,var
1378     (unwind-protect
1379     (multiple-value-prog1
1380     (progn ,@forms)
1381     (setq ,abortp nil))
1382 ram 1.1 (close ,var :abort ,abortp))))))
1383    
1384    
1385 ram 1.5
1386 ram 1.1 (defmacro with-open-stream ((var stream) &body (forms decls))
1387     "The form stream should evaluate to a stream. VAR is bound
1388     to the stream and the forms are evaluated as an implicit
1389     progn. The stream is closed upon exit."
1390     (let ((abortp (gensym)))
1391     `(let ((,var ,stream)
1392     (,abortp t))
1393     ,@decls
1394     (unwind-protect
1395     (multiple-value-prog1
1396     (progn ,@forms)
1397     (setq ,abortp nil))
1398     (when ,var
1399     (close ,var :abort ,abortp))))))
1400    
1401    
1402     (defmacro with-input-from-string ((var string &key index start end) &body (forms decls))
1403     "Binds the Var to an input stream that returns characters from String and
1404     executes the body. See manual for details."
1405     `(let ((,var
1406     ,(if end
1407     `(make-string-input-stream ,string ,(or start 0) ,end)
1408     `(make-string-input-stream ,string ,(or start 0)))))
1409     ,@decls
1410     (unwind-protect
1411     (progn ,@forms)
1412     (close ,var)
1413     ,@(if index `((setf ,index (string-input-stream-current ,var)))))))
1414    
1415    
1416     (defmacro with-output-to-string ((var &optional string) &body (forms decls))
1417 ram 1.5 "If *string* is specified, it must be a string with a fill pointer;
1418     the output is incrementally appended to the string (as if by use of
1419     VECTOR-PUSH-EXTEND)."
1420 ram 1.1 (if string
1421     `(let ((,var (make-fill-pointer-output-stream ,string)))
1422     ,@decls
1423     (unwind-protect
1424     (progn ,@forms)
1425     (close ,var)))
1426     `(let ((,var (make-string-output-stream)))
1427     ,@decls
1428     (unwind-protect
1429     (progn ,@forms)
1430     (close ,var))
1431     (get-output-stream-string ,var))))
1432    
1433    
1434     ;;;; Iteration macros:
1435    
1436     (defmacro dotimes ((var count &optional (result nil)) &body body)
1437     (cond ((numberp count)
1438     `(do ((,var 0 (1+ ,var)))
1439     ((>= ,var ,count) ,result)
1440 ram 1.8 (declare (type unsigned-byte ,var))
1441 ram 1.1 ,@body))
1442     (t (let ((v1 (gensym)))
1443     `(do ((,var 0 (1+ ,var)) (,v1 ,count))
1444     ((>= ,var ,v1) ,result)
1445 ram 1.8 (declare (type unsigned-byte ,var))
1446 ram 1.1 ,@body)))))
1447    
1448    
1449     ;;; We repeatedly bind the var instead of setting it so that we never give the
1450     ;;; var a random value such as NIL (which might conflict with a declaration).
1451 ram 1.35 ;;; If there is a result form, we introduce a gratitous binding of the variable
1452     ;;; to NIL w/o the declarations, then evaluate the result form in that
1453     ;;; environment. We spuriously reference the gratuitous variable, since we
1454     ;;; don't want to use IGNORABLE on what might be a special var.
1455 ram 1.1 ;;;
1456     (defmacro dolist ((var list &optional (result nil)) &body body)
1457     (let ((n-list (gensym)))
1458     `(do ((,n-list ,list (cdr ,n-list)))
1459     ((endp ,n-list)
1460 ram 1.35 ,@(if result
1461     `((let ((,var nil))
1462     ,var
1463     ,result))
1464     '(nil)))
1465 ram 1.1 (let ((,var (car ,n-list)))
1466     ,@body))))
1467    
1468    
1469     (defmacro do (varlist endlist &body (body decls))
1470     "DO ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*
1471     Iteration construct. Each Var is initialized in parallel to the value of the
1472     specified Init form. On subsequent iterations, the Vars are assigned the
1473     value of the Step form (if any) in paralell. The Test is evaluated before
1474     each evaluation of the body Forms. When the Test is true, the the Exit-Forms
1475     are evaluated as a PROGN, with the result being the value of the DO. A block
1476     named NIL is established around the entire expansion, allowing RETURN to be
1477     used as an laternate exit mechanism."
1478    
1479     (do-do-body varlist endlist body decls 'let 'psetq 'do nil))
1480    
1481    
1482     (defmacro do* (varlist endlist &body (body decls))
1483     "DO* ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*
1484     Iteration construct. Each Var is initialized sequentially (like LET*) to the
1485     value of the specified Init form. On subsequent iterations, the Vars are
1486     sequentially assigned the value of the Step form (if any). The Test is
1487     evaluated before each evaluation of the body Forms. When the Test is true,
1488     the the Exit-Forms are evaluated as a PROGN, with the result being the value
1489     of the DO. A block named NIL is established around the entire expansion,
1490     allowing RETURN to be used as an laternate exit mechanism."
1491     (do-do-body varlist endlist body decls 'let* 'setq 'do* nil))
1492    
1493    
1494     ;;;; Miscellaneous macros:
1495    
1496     (defmacro locally (&rest forms)
1497     "A form providing a container for locally-scoped variables."
1498     `(let () ,@forms))
1499    
1500     (defmacro psetq (&rest pairs)
1501     (do ((lets nil)
1502     (setqs nil)
1503     (pairs pairs (cddr pairs)))
1504     ((atom (cdr pairs))
1505     `(let ,(nreverse lets) (setq ,@(nreverse setqs))))
1506     (let ((gen (gensym)))
1507     (push `(,gen ,(cadr pairs)) lets)
1508     (push (car pairs) setqs)
1509     (push gen setqs))))
1510    
1511    
1512     ;;;; With-Compilation-Unit:
1513    
1514     ;;; True if we are within a With-Compilation-Unit form, which normally causes
1515     ;;; nested uses to be NOOPS.
1516     ;;;
1517     (defvar *in-compilation-unit* nil)
1518    
1519     ;;; Count of the number of compilation units dynamically enclosed by the
1520     ;;; current active WITH-COMPILATION-UNIT that were unwound out of.
1521     ;;;
1522     (defvar *aborted-compilation-units*)
1523    
1524 ram 1.21 (declaim (special c::*context-declarations*))
1525    
1526    
1527     ;;; EVALUATE-DECLARATION-CONTEXT -- Internal
1528     ;;;
1529     ;;; Recursively descend the context form, returning true if this subpart
1530     ;;; matches the specified context.
1531     ;;;
1532     (defun evaluate-declaration-context (context name parent)
1533 ram 1.24 (let* ((base (if (and (consp name) (consp (cdr name)))
1534     (cadr name)
1535     name))
1536     (package (and (symbolp base) (symbol-package base))))
1537 ram 1.21 (if (atom context)
1538 ram 1.24 (multiple-value-bind (ignore how)
1539     (if package
1540     (find-symbol (symbol-name base) package)
1541     (values nil nil))
1542     (declare (ignore ignore))
1543     (case context
1544     (:internal (eq how :internal))
1545     (:external (eq how :external))
1546     (:uninterned (and (symbolp base) (not package)))
1547     (:anonymous (not name))
1548     (:macro (eq parent 'defmacro))
1549     (:function (member parent '(defun labels flet function)))
1550     (:global (member parent '(defun defmacro function)))
1551     (:local (member parent '(labels flet)))
1552     (t
1553     (error "Unknown declaration context: ~S." context))))
1554 ram 1.21 (case (first context)
1555     (:or
1556     (loop for x in (rest context)
1557     thereis (evaluate-declaration-context x name parent)))
1558     (:and
1559     (loop for x in (rest context)
1560     always (evaluate-declaration-context x name parent)))
1561     (:not
1562     (evaluate-declaration-context (second context) name parent))
1563     (:member
1564     (member name (rest context) :test #'equal))
1565     (:match
1566     (let ((name (concatenate 'string "$" (string base) "$")))
1567     (loop for x in (rest context)
1568     thereis (search (string x) name))))
1569 ram 1.24 (:package
1570     (and package
1571     (loop for x in (rest context)
1572     thereis (eq (find-package (string x)) package))))
1573 ram 1.21 (t
1574     (error "Unknown declaration context: ~S." context))))))
1575    
1576    
1577     ;;; PROCESS-CONTEXT-DECLARATIONS -- Internal
1578     ;;;
1579     ;;; Given a list of context declaration specs, return a new value for
1580     ;;; C::*CONTEXT-DECLARATIONS*.
1581     ;;;
1582     (defun process-context-declarations (decls)
1583     (append
1584     (mapcar
1585     #'(lambda (decl)
1586     (unless (>= (length decl) 2)
1587     (error "Context declaration spec should have context and at ~
1588     least one DECLARE form:~% ~S" decl))
1589     #'(lambda (name parent)
1590     (when (evaluate-declaration-context (first decl) name parent)
1591     (rest decl))))
1592     decls)
1593     c::*context-declarations*))
1594    
1595    
1596 ram 1.1 ;;; With-Compilation-Unit -- Public
1597     ;;;
1598     (defmacro with-compilation-unit (options &body body)
1599 ram 1.21 "WITH-COMPILATION-UNIT ({Key Value}*) Form*
1600     This form affects compilations that take place within its dynamic extent. It
1601     is intended to be wrapped around the compilation of all files in the same
1602     system. These keywords are defined:
1603     :OVERRIDE Boolean-Form
1604     One of the effects of this form is to delay undefined warnings
1605     until the end of the form, instead of giving them at the end of each
1606     compilation. If OVERRIDE is NIL (the default), then the outermost
1607     WITH-COMPILATION-UNIT form grabs the undefined warnings. Specifying
1608     OVERRIDE true causes that form to grab any enclosed warnings, even if
1609     it is enclosed by another WITH-COMPILATION-UNIT.
1610     :OPTIMIZE Decl-Form
1611     Decl-Form should evaluate to an OPTIMIZE declaration specifier. This
1612     declaration changes the `global' policy for compilations within the
1613     body.
1614     :OPTIMIZE-INTERFACE Decl-Form
1615     Like OPTIMIZE, except that it specifies the value of the CMU extension
1616     OPTIMIZE-INTERFACE policy (which controls argument type and syntax
1617     checking.)
1618     :CONTEXT-DECLARATIONS List-of-Context-Decls-Form
1619     This is a CMU extension which allows compilation to be controlled
1620     by pattern matching on the context in which a definition appears. The
1621     argument should evaluate to a list of lists of the form:
1622     (Context-Spec Declare-Form+)
1623     In the indicated context, the specified declare forms are inserted at
1624     the head of each definition. The declare forms for all contexts that
1625     match are appended together, with earlier declarations getting
1626     predecence over later ones. A simple example:
1627     :context-declarations
1628     '((:external (declare (optimize (safety 2)))))
1629     This will cause all functions that are named by external symbols to be
1630     compiled with SAFETY 2. The full syntax of context specs is:
1631     :INTERNAL, :EXTERNAL
1632     True if the symbols is internal (external) in its home package.
1633     :UNINTERNED
1634     True if the symbol has no home package.
1635     :ANONYMOUS
1636     True if the function doesn't have any interesting name (not
1637     DEFMACRO, DEFUN, LABELS or FLET).
1638     :MACRO, :FUNCTION
1639     :MACRO is a global (DEFMACRO) macro. :FUNCTION is anything else.
1640     :LOCAL, :GLOBAL
1641     :LOCAL is a LABELS or FLET. :GLOBAL is anything else.
1642     (:OR Context-Spec*)
1643     True in any specified context.
1644     (:AND Context-Spec*)
1645     True only when all specs are true.
1646     (:NOT Context-Spec)
1647     True when the spec is false.
1648     (:MEMBER Name*)
1649     True when the name is one of these names (EQUAL test.)
1650     (:MATCH Pattern*)
1651     True when any of the patterns is a substring of the name. The name
1652     is wrapped with $'s, so $FOO matches names beginning with FOO,
1653     etc."
1654     (let ((override nil)
1655     (optimize nil)
1656     (optimize-interface nil)
1657     (context-declarations nil)
1658 ram 1.1 (n-fun (gensym))
1659     (n-abort-p (gensym)))
1660     (when (oddp (length options))
1661     (error "Odd number of key/value pairs: ~S." options))
1662     (do ((opt options (cddr opt)))
1663     ((null opt))
1664     (case (first opt)
1665 ram 1.21 (:override
1666     (setq override (second opt)))
1667     (:optimize
1668     (setq optimize (second opt)))
1669     (:optimize-interface
1670     (setq optimize-interface (second opt)))
1671     (:context-declarations
1672     (setq context-declarations (second opt)))
1673 ram 1.1 (t
1674     (warn "Ignoring unknown option: ~S." (first opt)))))
1675    
1676 ram 1.21 `(flet ((,n-fun ()
1677     (let (,@(when optimize
1678     `((c::*default-cookie*
1679     (c::process-optimize-declaration
1680     ,optimize c::*default-cookie*))))
1681     ,@(when optimize-interface
1682     `((c::*default-interface-cookie*
1683     (c::process-optimize-declaration
1684     ,optimize-interface
1685     c::*default-interface-cookie*))))
1686     ,@(when context-declarations
1687     `((c::*context-declarations*
1688     (process-context-declarations
1689     ,context-declarations)))))
1690     ,@body)))
1691     (if (or ,override (not *in-compilation-unit*))
1692 ram 1.6 (let ((c::*undefined-warnings* nil)
1693 ram 1.1 (c::*compiler-error-count* 0)
1694     (c::*compiler-warning-count* 0)
1695     (c::*compiler-note-count* 0)
1696     (*in-compilation-unit* t)
1697     (*aborted-compilation-units* 0)
1698     (,n-abort-p t))
1699 ram 1.6 (handler-bind ((c::parse-unknown-type
1700     #'(lambda (c)
1701     (c::note-undefined-reference
1702     (c::parse-unknown-type-specifier c)
1703     :type))))
1704     (unwind-protect
1705     (multiple-value-prog1
1706     (,n-fun)
1707     (setq ,n-abort-p nil))
1708     (c::print-summary ,n-abort-p *aborted-compilation-units*))))
1709 ram 1.1 (let ((,n-abort-p t))
1710     (unwind-protect
1711     (multiple-value-prog1
1712     (,n-fun)
1713     (setq ,n-abort-p nil))
1714     (when ,n-abort-p
1715     (incf *aborted-compilation-units*))))))))

  ViewVC Help
Powered by ViewVC 1.1.5