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1 | ;; Common Lisp bindings for GTK+ v2.x |
2 | ;; Copyright 1999-2006 Espen S. Johnsen <espen@users.sf.net> |
3 | ;; |
4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
5 | ;; a copy of this software and associated documentation files (the |
6 | ;; "Software"), to deal in the Software without restriction, including |
7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
9 | ;; permit persons to whom the Software is furnished to do so, subject to |
10 | ;; the following conditions: |
11 | ;; |
12 | ;; The above copyright notice and this permission notice shall be |
13 | ;; included in all copies or substantial portions of the Software. |
14 | ;; |
15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
22 | |
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23 | ;; $Id: interface.lisp,v 1.7 2007/10/17 17:04:15 espen Exp $ |
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24 | |
25 | (in-package "GFFI") |
26 | |
27 | |
28 | ;;;; Foreign function call interface |
29 | |
30 | (defvar *package-prefix* nil) |
31 | |
32 | (defun set-package-prefix (prefix &optional (package *package*)) |
33 | (let ((package (find-package package))) |
34 | (setq *package-prefix* (delete package *package-prefix* :key #'car)) |
35 | (push (cons package prefix) *package-prefix*)) |
36 | prefix) |
37 | |
38 | (defun package-prefix (&optional (package *package*)) |
39 | (let ((package (find-package package))) |
40 | (or |
41 | (cdr (assoc package *package-prefix*)) |
42 | (substitute #\_ #\- (string-downcase (package-name package)))))) |
43 | |
44 | (defun find-prefix-package (prefix) |
45 | (or |
46 | (car (rassoc (string-downcase prefix) *package-prefix* :test #'string=)) |
47 | (find-package (string-upcase prefix)))) |
48 | |
49 | (defmacro use-prefix (prefix &optional (package *package*)) |
50 | `(eval-when (:compile-toplevel :load-toplevel :execute) |
51 | (set-package-prefix ,prefix ,package))) |
52 | |
53 | |
54 | (defun default-alien-fname (lisp-name) |
55 | (let* ((name (substitute #\_ #\- (string-downcase lisp-name))) |
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56 | (start (position-if-not #'(lambda (char) (char= char #\%)) name)) |
57 | (end (if (string= "_p" name :start2 (- (length name) 2)) |
58 | (- (length name) 2) |
59 | (length name))) |
60 | (stripped-name (subseq name start end)) |
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61 | (prefix (package-prefix *package*))) |
62 | (if (or (not prefix) (string= prefix "")) |
63 | stripped-name |
64 | (format nil "~A_~A" prefix stripped-name)))) |
65 | |
66 | (defun default-alien-type-name (type-name) |
67 | (let ((prefix (package-prefix *package*))) |
68 | (apply |
69 | #'concatenate |
70 | 'string |
71 | (mapcar |
72 | #'string-capitalize |
73 | (cons prefix (split-string (symbol-name type-name) :delimiter #\-)))))) |
74 | |
75 | (defun default-type-name (alien-name) |
76 | (let ((parts |
77 | (mapcar |
78 | #'string-upcase |
79 | (split-string-if alien-name #'upper-case-p)))) |
80 | (intern |
81 | (concatenate-strings (rest parts) #\-) |
82 | (find-prefix-package (first parts))))) |
83 | |
84 | |
85 | (defun in-arg-p (style) |
86 | (find style '(:in :in/out :in/return :in-out :return))) |
87 | |
88 | (defun out-arg-p (style) |
89 | (find style '(:out :in/out :in-out))) |
90 | |
91 | (defun return-arg-p (style) |
92 | (find style '(:in/return :return))) |
93 | |
94 | (defmacro defbinding (name lambda-list return-type &rest args) |
95 | (multiple-value-bind (lisp-name c-name) |
96 | (if (atom name) |
97 | (values name (default-alien-fname name)) |
98 | (values-list name)) |
99 | |
100 | (let* ((lambda-list-supplied-p lambda-list) |
101 | (lambda-list (unless (equal lambda-list '(nil)) lambda-list)) |
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102 | (arg-types ()) |
103 | (aux-bindings ()) |
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104 | (doc-string (when (stringp (first args)) (pop args))) |
105 | (parsed-args |
106 | (mapcar |
107 | #'(lambda (arg) |
108 | (destructuring-bind |
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109 | (expr type &optional (style :in) (out-type type)) |
110 | (if (atom arg) |
111 | (list arg arg) |
112 | arg) |
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113 | (cond |
114 | ((find style '(:in-out :return)) |
115 | (warn "Deprecated argument style: ~S" style)) |
116 | ((not (find style '(:in :out :in/out :in/return))) |
117 | (error "Bogus argument style: ~S" style))) |
118 | (when (and |
119 | (not lambda-list-supplied-p) |
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120 | (namep expr) (in-arg-p style) |
121 | (not (find expr lambda-list))) |
122 | (push expr lambda-list) |
123 | (push type arg-types)) |
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124 | (let ((aux (unless (or (not (in-arg-p style)) (namep expr)) |
125 | (gensym)))) |
126 | (when aux |
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127 | (push (list aux expr) aux-bindings)) |
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128 | (list |
129 | (cond |
130 | ((and (namep expr) (not (in-arg-p style))) expr) |
131 | ((namep expr) (make-symbol (string expr))) |
132 | ((gensym))) |
133 | (or aux expr) type style out-type)))) |
134 | args))) |
135 | |
136 | (%defbinding c-name lisp-name |
137 | (if lambda-list-supplied-p lambda-list (nreverse lambda-list)) |
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138 | (not lambda-list-supplied-p) (nreverse arg-types) |
139 | aux-bindings return-type doc-string parsed-args)))) |
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140 | |
141 | |
142 | #+(or cmu sbcl) |
143 | (defun foreign-funcall (cname args return-type) |
144 | (let ((fparams (loop |
145 | for (var expr type style out-type) in args |
146 | collect (if (out-arg-p style) |
147 | `(addr ,var) |
148 | var))) |
149 | (ftypes (loop |
150 | for (var expr type style out-type) in args |
151 | collect (if (out-arg-p style) |
152 | `(* ,(alien-type out-type)) |
153 | (alien-type out-type)))) |
154 | (fname (make-symbol cname))) |
155 | `(with-alien ((,fname (function ,(alien-type return-type) ,@ftypes) :extern ,cname)) |
156 | (alien-funcall ,fname ,@fparams)))) |
157 | |
158 | #+clisp |
159 | (defun foreign-funcall (cname args return-type) |
160 | (let* ((fparams (loop |
161 | for (var expr type style out-type) in args |
162 | collect (if (out-arg-p style) |
163 | `(ffi:c-var-address ,var) |
164 | var))) |
165 | (fargs (loop |
166 | for (var expr type style out-type) in args |
167 | collect (list var (if (out-arg-p style) |
168 | 'ffi:c-pointer |
169 | (alien-type out-type))))) |
170 | (c-function `(ffi:c-function |
171 | (:arguments ,@fargs) |
172 | (:return-type ,(alien-type return-type)) |
173 | (:language :stdc)))) |
174 | `(funcall |
175 | (load-time-value |
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176 | (ffi::foreign-library-function |
177 | ,cname (ffi::foreign-library :default) #?(clisp>= 2 40)nil |
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178 | nil (ffi:parse-c-type ',c-function))) |
179 | ,@fparams))) |
180 | |
181 | |
182 | ;; TODO: check if in and out types (if different) translates to same |
183 | ;; alien type |
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184 | (defun %defbinding (cname lisp-name lambda-list declare-p arg-types aux-bindings return-type doc args) |
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185 | (let ((out (loop |
186 | for (var expr type style out-type) in args |
187 | when (or (out-arg-p style) (return-arg-p style)) |
188 | collect (from-alien-form out-type var))) |
189 | (fcall (from-alien-form return-type |
190 | (foreign-funcall cname args return-type)))) |
191 | |
192 | (labels ((create-wrapper (args body) |
193 | (if args |
194 | (destructuring-bind (var expr type style out-type) (first args) |
195 | (declare (ignore out-type)) |
196 | (alien-arg-wrapper type var expr style |
197 | (create-wrapper (rest args) body))) |
198 | body))) |
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199 | `(progn |
200 | ,(when declare-p |
201 | `(declaim |
202 | (ftype |
203 | (function |
204 | ,(mapcar #'argument-type arg-types) |
205 | (values |
206 | ,@(when return-type (list (return-type return-type))) |
207 | ,@(loop |
208 | for (var expr type style out-type) in args |
209 | when (out-arg-p style) |
210 | collect (return-type out-type) |
211 | when (return-arg-p style) |
212 | collect (return-type type))))))) |
213 | (defun ,lisp-name ,lambda-list |
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214 | ,doc |
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215 | (let ,aux-bindings |
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216 | ,(if return-type |
217 | (create-wrapper args `(values ,fcall ,@out)) |
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218 | (create-wrapper args `(progn ,fcall (values ,@out)))))))))) |
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219 | |
220 | |
221 | |
222 | ;;;; Dynamic (runtime) bindings |
223 | |
224 | (defun mkbinding (name return-type &rest arg-types) |
225 | #+cmu(declare (optimize (inhibit-warnings 3))) |
226 | #+sbcl(declare (muffle-conditions compiler-note)) |
227 | (let* ((c-function |
228 | #+(or cmu sbcl) |
229 | `(function ,@(mapcar #'alien-type (cons return-type arg-types))) |
230 | #+clisp |
231 | `(ffi:c-function |
232 | (:arguments ,@(mapcar |
233 | #'(lambda (type) |
234 | (list (gensym) (alien-type type))) |
235 | arg-types)) |
236 | (:return-type ,(alien-type return-type)) |
237 | (:language :stdc))) |
238 | (foreign |
239 | #+(or cmu sbcl) |
240 | (handler-bind (#+sbcl(compiler-note #'(lambda (condition) |
241 | (declare (ignore condition)) |
242 | (muffle-warning)))) |
243 | (%heap-alien |
244 | (make-heap-alien-info |
245 | :type (parse-alien-type c-function #+sbcl nil) |
246 | :sap-form (let ((address (foreign-symbol-address name))) |
247 | (etypecase address |
248 | (integer (int-sap address)) |
249 | (system-area-pointer address)))))) |
250 | #+clisp |
251 | (ffi::foreign-library-function name |
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252 | (ffi::foreign-library :default) #?(clisp>= 2 40)nil |
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253 | nil (ffi:parse-c-type c-function))) |
254 | (return-value-translator (from-alien-function return-type))) |
255 | (multiple-value-bind (arg-translators cleanup-funcs) |
256 | (let ((translator/cleanup-pairs |
257 | (mapcar |
258 | #'(lambda (type) |
259 | (multiple-value-list (to-alien-function type))) |
260 | arg-types))) |
261 | (values |
262 | (mapcar #'first translator/cleanup-pairs) |
263 | (mapcar #'second translator/cleanup-pairs))) |
264 | #'(lambda (&rest args) |
265 | (let ((translated-args (mapcar #'funcall arg-translators args))) |
266 | (prog1 |
267 | (funcall return-value-translator |
268 | #+(or cmu sbcl)(apply #'alien-funcall foreign translated-args) |
269 | #+clisp(apply foreign translated-args)) |
270 | (mapc |
271 | #'(lambda (cleanup arg translated-arg) |
272 | (when cleanup |
273 | (funcall cleanup arg translated-arg))) |
274 | cleanup-funcs args translated-args))))))) |
275 | |
276 | |
277 | |
278 | ;;;; C Callbacks |
279 | |
280 | (defun callback-body (args return-type body) |
281 | (labels ((create-wrappers (args body) |
282 | (if args |
283 | (destructuring-bind (var type) (first args) |
284 | (callback-wrapper type var var |
285 | (create-wrappers (rest args) body))) |
286 | body)) |
287 | (create-body (args body) |
288 | (to-alien-form return-type |
289 | (create-wrappers args `(progn ,@body))))) |
290 | (if (and (consp (first body)) (eq (caar body) 'declare)) |
291 | (let ((ignored (loop |
292 | for declaration in (cdar body) |
293 | when (eq (first declaration) 'ignore) |
294 | nconc (rest declaration)))) |
295 | `(,(first body) |
296 | ,(create-body |
297 | (remove-if #'(lambda (arg) |
298 | (find (first arg) ignored)) |
299 | args) |
300 | (rest body)))) |
301 | (list (create-body args body))))) |
302 | |
303 | |
304 | #+(or cmu sbcl) |
305 | (defmacro define-callback (name return-type args &body body) |
306 | (let ((define-callback |
307 | #+cmu'alien:def-callback |
308 | #+(and sbcl alien-callbacks)'sb-alien::define-alien-callback |
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309 | #+(and sbcl (not alien-callbacks))'sb-alien:define-alien-function) |
310 | (args (mapcar #'(lambda (arg) |
311 | (if (atom arg) (list arg arg) arg)) |
312 | args))) |
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313 | `(progn |
314 | #+cmu(defparameter ,name nil) |
315 | (,define-callback ,name |
316 | #+(and sbcl alien-callbacks) ,(alien-type return-type) |
317 | (#+(or cmu (and sbcl (not alien-callbacks))),(alien-type return-type) |
318 | ,@(loop |
319 | for (name type) in args |
320 | collect `(,name ,(alien-type type)))) |
321 | ,@(callback-body args return-type body))))) |
322 | |
323 | #+(or cmu sbcl) |
324 | (defun callback-address (callback) |
325 | #+cmu(alien::callback-trampoline callback) |
326 | #+(and sbcl (not alien-callbacks))(sb-alien:alien-function-sap callback) |
327 | #+(and sbcl alien-callbacks)(sb-alien:alien-sap callback)) |
328 | |
329 | #+sbcl |
330 | (deftype callback () |
331 | #-alien-callbacks'sb-alien:alien-function |
332 | #+alien-callbacks'sb-alien:alien) |
333 | |
334 | |
335 | ;;; The callback code for CLISP is based on code from CFFI |
336 | ;;; Copyright (C) 2005, James Bielman <jamesjb@jamesjb.com> |
337 | ;;; (C) 2005, Joerg Hoehle <hoehle@users.sourceforge.net> |
338 | |
339 | |
340 | ;;; *CALLBACKS* contains the callbacks defined by the %DEFCALLBACK |
341 | ;;; macro. The symbol naming the callback is the key, and the value |
342 | ;;; is a list containing a Lisp function, the parsed CLISP FFI type of |
343 | ;;; the callback, and a saved pointer that should not persist across |
344 | ;;; saved images. |
345 | #+clisp |
346 | (progn |
347 | (defvar *callbacks* (make-hash-table)) |
348 | |
349 | ;;; Return a CLISP FFI function type for a CFFI callback function |
350 | ;;; given a return type and list of argument names and types. |
351 | (eval-when (:compile-toplevel :load-toplevel :execute) |
352 | (defun callback-type (return-type arg-names arg-types) |
353 | (ffi:parse-c-type |
354 | `(ffi:c-function |
355 | (:arguments ,@(mapcar (lambda (sym type) |
356 | (list sym (alien-type type))) |
357 | arg-names arg-types)) |
358 | (:return-type ,(alien-type return-type)) |
359 | (:language :stdc))))) |
360 | |
361 | ;;; Register and create a callback function. |
362 | (defun register-callback (name function parsed-type) |
363 | (setf (gethash name *callbacks*) |
364 | (list function parsed-type |
365 | (ffi:with-foreign-object (ptr 'ffi:c-pointer) |
366 | ;; Create callback by converting Lisp function to foreign |
367 | (setf (ffi:memory-as ptr parsed-type) function) |
368 | (ffi:foreign-value ptr))))) |
369 | |
370 | ;;; Restore all saved callback pointers when restarting the Lisp |
371 | ;;; image. This is pushed onto CUSTOM:*INIT-HOOKS*. |
372 | ;;; Needs clisp > 2.35, bugfix 2005-09-29 |
373 | (defun restore-callback-pointers () |
374 | (maphash |
375 | (lambda (name list) |
376 | (register-callback name (first list) (second list))) |
377 | *callbacks*)) |
378 | |
379 | ;;; Add RESTORE-CALLBACK-POINTERS to the lists of functions to run |
380 | ;;; when an image is restarted. |
381 | (eval-when (:load-toplevel :execute) |
382 | (pushnew 'restore-callback-pointers custom:*init-hooks*)) |
383 | |
384 | ;;; Define a callback function NAME to run BODY with arguments |
385 | ;;; ARG-NAMES translated according to ARG-TYPES and the return type |
386 | ;;; translated according to RETTYPE. Obtain a pointer that can be |
387 | ;;; passed to C code for this callback by calling %CALLBACK. |
388 | (defmacro define-callback (name return-type args &body body) |
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389 | (let* ((args (mapcar #'(lambda (arg) |
390 | (if (atom arg) (list arg arg) arg)) |
391 | args)) |
392 | (arg-names (mapcar #'first args)) |
393 | (arg-types (mapcar #'second args))) |
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394 | `(progn |
395 | (defvar ,name ',name) |
396 | (register-callback ',name |
397 | (lambda ,arg-names ,@(callback-body args return-type body)) |
398 | ,(callback-type return-type arg-names arg-types))))) |
399 | |
400 | ;;; Look up the name of a callback and return a pointer that can be |
401 | ;;; passed to a C function. Signals an error if no callback is |
402 | ;;; defined called NAME. |
403 | (defun callback-address (name) |
404 | (multiple-value-bind (list winp) (gethash name *callbacks*) |
405 | (unless winp |
406 | (error "Undefined callback: ~S" name)) |
407 | (third list))) |
408 | |
409 | (deftype callback () 'symbol)) |
410 | |
411 | |
412 | |
413 | ;;;; Type expansion |
414 | |
415 | (defun type-expand-1 (form) |
416 | #+(or cmu sbcl) |
417 | (let ((def (cond ((symbolp form) |
418 | #+cmu(kernel::info type expander form) |
419 | #+sbcl(sb-impl::info :type :expander form)) |
420 | ((and (consp form) (symbolp (car form))) |
421 | #+cmu(kernel::info type expander (car form)) |
422 | #+sbcl(sb-impl::info :type :expander (car form))) |
423 | (t nil)))) |
424 | (if def |
425 | (values (funcall def (if (consp form) form (list form))) t) |
426 | (values form nil))) |
427 | #+clisp(ext:type-expand form t)) |
428 | |
429 | (defun type-expand-to (type form) |
430 | (labels ((expand (form0) |
431 | (if (eq (first (mklist form0)) type) |
432 | form0 |
433 | (multiple-value-bind (expanded-form expanded-p) |
434 | (type-expand-1 form0) |
435 | (if expanded-p |
436 | (expand expanded-form) |
437 | (error "~A can not be expanded to ~A" form type)))))) |
438 | (expand form))) |
439 | |
440 | |
441 | |
442 | ;;;; Type methods |
443 | |
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444 | (defun find-type-method (name type-spec &optional (error-p t)) |
445 | (let ((type-methods (get name 'type-methods)) |
446 | (specifier (if (atom type-spec) |
447 | type-spec |
448 | (first type-spec)))) |
449 | (or |
450 | (gethash specifier type-methods) |
451 | (when error-p |
452 | (error |
453 | "No explicit type method for ~A when call width type specifier ~A found" |
454 | name type-spec))))) |
455 | |
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456 | (defun find-next-type-method (name type-spec &optional (error-p t)) |
457 | (let ((type-methods (get name 'type-methods))) |
458 | (labels ((search-method-in-cpl-order (classes) |
459 | (when classes |
460 | (or |
461 | (gethash (class-name (first classes)) type-methods) |
462 | (search-method-in-cpl-order (rest classes))))) |
463 | (lookup-method (type-spec) |
464 | (if (and (symbolp type-spec) (find-class type-spec nil)) |
465 | (let ((class (find-class type-spec))) |
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466 | #?(or (sbcl>= 0 9 15) (featurep :clisp)) |
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467 | (unless (class-finalized-p class) |
468 | (finalize-inheritance class)) |
469 | (search-method-in-cpl-order |
470 | (rest (class-precedence-list class)))) |
471 | (multiple-value-bind (expanded-type expanded-p) |
472 | (type-expand-1 type-spec) |
473 | (when expanded-p |
474 | (or |
475 | (let ((specifier (etypecase expanded-type |
476 | (symbol expanded-type) |
477 | (list (first expanded-type))))) |
478 | (gethash specifier type-methods)) |
479 | (lookup-method expanded-type)))))) |
480 | (search-built-in-type-hierarchy (sub-tree) |
481 | (when (subtypep type-spec (first sub-tree)) |
482 | (or |
483 | (search-nodes (cddr sub-tree)) |
484 | (second sub-tree)))) |
485 | (search-nodes (nodes) |
486 | (loop |
487 | for node in nodes |
488 | as method = (search-built-in-type-hierarchy node) |
489 | until method |
490 | finally (return method)))) |
491 | (or |
492 | (lookup-method type-spec) |
493 | ;; This is to handle unexpandable types whichs doesn't name a |
494 | ;; class. It may cause infinite loops with illegal |
495 | ;; call-next-method calls |
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496 | (unless (or |
497 | (null type-spec) |
498 | (and (symbolp type-spec) (find-class type-spec nil))) |
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499 | (search-nodes (get name 'built-in-type-hierarchy))) |
500 | (when error-p |
501 | (error "No next type method ~A for type specifier ~A" |
502 | name type-spec)))))) |
503 | |
504 | (defun find-applicable-type-method (name type-spec &optional (error-p t)) |
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505 | (or |
506 | (find-type-method name type-spec nil) |
507 | (find-next-type-method name type-spec nil) |
508 | (when error-p |
509 | (error |
510 | "No applicable type method for ~A when call width type specifier ~A" |
511 | name type-spec)))) |
512 | |
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513 | |
514 | (defun insert-type-in-hierarchy (specifier function nodes) |
515 | (cond |
516 | ((let ((node (find specifier nodes :key #'first))) |
517 | (when node |
518 | (setf (second node) function) |
519 | nodes))) |
520 | ((let ((node |
521 | (find-if |
522 | #'(lambda (node) |
523 | (subtypep specifier (first node))) |
524 | nodes))) |
525 | (when node |
526 | (setf (cddr node) |
527 | (insert-type-in-hierarchy specifier function (cddr node))) |
528 | nodes))) |
529 | ((let ((sub-nodes (remove-if-not |
530 | #'(lambda (node) |
531 | (subtypep (first node) specifier)) |
532 | nodes))) |
533 | (cons |
534 | (list* specifier function sub-nodes) |
535 | (nset-difference nodes sub-nodes)))))) |
536 | |
537 | (defun add-type-method (name specifier function) |
538 | (setf (gethash specifier (get name 'type-methods)) function) |
539 | (when (typep (find-class specifier nil) 'built-in-class) |
540 | (setf (get name 'built-in-type-hierarchy) |
541 | (insert-type-in-hierarchy specifier function |
542 | (get name 'built-in-type-hierarchy))))) |
543 | |
544 | |
545 | (defmacro define-type-generic (name lambda-list &optional documentation) |
546 | (let ((type-spec (first lambda-list))) |
547 | (if (or |
548 | (not lambda-list) |
549 | (find type-spec '(&optional &key &rest &allow-other-keys))) |
550 | (error "A type generic needs at least one required argument") |
551 | `(progn |
552 | (unless (get ',name 'type-methods) |
553 | (setf (get ',name 'type-methods) (make-hash-table)) |
554 | (setf (get ',name 'built-in-type-hierarchy) ())) |
555 | ,(if (intersection '(&optional &key &rest &allow-other-keys) lambda-list) |
556 | (let ((args (make-symbol "ARGS"))) |
557 | `(defun ,name (,type-spec &rest ,args) |
558 | ,documentation |
559 | (apply |
560 | (find-applicable-type-method ',name ,type-spec) |
561 | ,type-spec ,args))) |
562 | `(defun ,name ,lambda-list |
563 | ,documentation |
564 | (funcall |
565 | (find-applicable-type-method ',name ,type-spec) |
566 | ,@lambda-list))))))) |
567 | |
568 | |
569 | (defmacro define-type-method (name lambda-list &body body) |
570 | (let ((specifier (cadar lambda-list)) |
571 | (args (make-symbol "ARGS"))) |
572 | `(progn |
573 | (add-type-method ',name ',specifier |
574 | #'(lambda (&rest ,args) |
575 | (flet ((call-next-method (&rest args) |
576 | (let ((next-method (find-next-type-method ',name ',specifier))) |
577 | (apply next-method (or args ,args))))) |
578 | (destructuring-bind (,(caar lambda-list) ,@(rest lambda-list)) ,args |
579 | ,@body)))) |
580 | ',name))) |
581 | |
582 | |
583 | ;;; Rules for auto-exporting symbols |
584 | |
585 | (defexport defbinding (name &rest args) |
586 | (declare (ignore args)) |
587 | (if (symbolp name) |
588 | name |
589 | (first name))) |
590 | |
591 | (defexport define-type-generic (name &rest args) |
592 | (declare (ignore args)) |
593 | name) |