Commit | Line | Data |
---|---|---|
1f1d88f5 MW |
1 | ;;; -*-lisp-*- |
2 | ;;; | |
dea4d055 | 3 | ;;; Method combination implementation |
1f1d88f5 MW |
4 | ;;; |
5 | ;;; (c) 2009 Straylight/Edgeware | |
6 | ;;; | |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
dea4d055 | 10 | ;;; This file is part of the Sensble Object Design, an object system for C. |
1f1d88f5 MW |
11 | ;;; |
12 | ;;; SOD is free software; you can redistribute it and/or modify | |
13 | ;;; it under the terms of the GNU General Public License as published by | |
14 | ;;; the Free Software Foundation; either version 2 of the License, or | |
15 | ;;; (at your option) any later version. | |
16 | ;;; | |
17 | ;;; SOD is distributed in the hope that it will be useful, | |
18 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;;; GNU General Public License for more details. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with SOD; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
26 | (cl:in-package #:sod) | |
27 | ||
1f1d88f5 MW |
28 | ;;;-------------------------------------------------------------------------- |
29 | ;;; Message classes. | |
30 | ||
dea4d055 | 31 | (export 'basic-message) |
1f1d88f5 MW |
32 | (defclass basic-message (sod-message) |
33 | ((argument-tail :type list :reader sod-message-argument-tail) | |
34 | (no-varargs-tail :type list :reader sod-message-no-varargs-tail)) | |
35 | (:documentation | |
36 | "Base class for built-in message classes. | |
37 | ||
38 | Provides the basic functionality for the built-in method combinations. | |
39 | This is a separate class so that `special effect' messages can avoid | |
40 | inheriting its default behaviour. | |
41 | ||
dea4d055 | 42 | The function type protocol is implemented on `basic-message' using slot |
1f1d88f5 | 43 | reader methods. The actual values are computed on demand in methods |
dea4d055 | 44 | defined on `slot-unbound'.")) |
1f1d88f5 MW |
45 | |
46 | (defmethod slot-unbound (class | |
47 | (message basic-message) | |
48 | (slot-name (eql 'argument-tail))) | |
49 | (let ((seq 0)) | |
dea4d055 MW |
50 | (setf (slot-value message 'argument-tail) |
51 | (mapcar (lambda (arg) | |
52 | (if (or (eq arg :ellipsis) (argument-name arg)) arg | |
53 | (make-argument (make-instance 'temporary-argument | |
54 | :tag (prog1 seq | |
55 | (incf seq))) | |
56 | (argument-type arg)))) | |
57 | (c-function-arguments (sod-message-type message)))))) | |
1f1d88f5 MW |
58 | |
59 | (defmethod slot-unbound (class | |
60 | (message basic-message) | |
61 | (slot-name (eql 'no-varargs-tail))) | |
dea4d055 MW |
62 | (setf (slot-value message 'no-varargs-tail) |
63 | (mapcar (lambda (arg) | |
64 | (if (eq arg :ellipsis) | |
65 | (make-argument *sod-ap* (c-type va-list)) | |
66 | arg)) | |
67 | (sod-message-argument-tail message)))) | |
1f1d88f5 MW |
68 | |
69 | (defmethod sod-message-method-class | |
70 | ((message basic-message) (class sod-class) pset) | |
71 | (let ((role (get-property pset :role :keyword nil))) | |
72 | (case role | |
73 | ((:before :after) 'daemon-direct-method) | |
74 | (:around 'delegating-direct-method) | |
75 | ((nil) (error "How odd: a primary method slipped through the net")) | |
76 | (t (error "Unknown method role ~A" role))))) | |
77 | ||
dea4d055 MW |
78 | (export 'simple-message) |
79 | (defclass simple-message (basic-message) | |
80 | () | |
81 | (:documentation | |
82 | "Base class for messages with `simple' method combinations. | |
1f1d88f5 | 83 | |
dea4d055 | 84 | A simple method combination is one which has only one method role other |
3109662a MW |
85 | than the `before', `after' and `around' methods provided by |
86 | `basic-message'. We call these `primary' methods, and the programmer | |
87 | designates them by not specifying an explicit role. | |
1f1d88f5 | 88 | |
dea4d055 MW |
89 | If the programmer doesn't define any primary methods then the effective |
90 | method is null -- i.e., the method entry pointer shows up as a null | |
91 | pointer.")) | |
92 | ||
93 | (defmethod sod-message-method-class | |
94 | ((message simple-message) (class sod-class) pset) | |
95 | (if (get-property pset :role :keyword nil) | |
96 | (call-next-method) | |
97 | (primary-method-class message))) | |
1f1d88f5 MW |
98 | |
99 | ;;;-------------------------------------------------------------------------- | |
100 | ;;; Direct method classes. | |
101 | ||
dea4d055 | 102 | (export 'basic-direct-method) |
1f1d88f5 | 103 | (defclass basic-direct-method (sod-method) |
77027cca MW |
104 | ((role :initarg :role :type symbol :reader sod-method-role) |
105 | (function-type :type c-function-type :reader sod-method-function-type)) | |
1f1d88f5 MW |
106 | (:documentation |
107 | "Base class for built-in direct method classes. | |
108 | ||
109 | Provides the basic functionality for the built-in direct-method classes. | |
110 | This is a separate class so that `special effect' methods can avoid | |
111 | inheriting its default behaviour and slots. | |
112 | ||
113 | A basic method can be assigned a `role', which may be set either as an | |
dea4d055 | 114 | initarg or using the `:role' property. Roles are used for method |
1f1d88f5 MW |
115 | categorization. |
116 | ||
dea4d055 | 117 | The function type protocol is implemented on `basic-direct-method' using |
1f1d88f5 | 118 | slot reader methods. The actual values are computed on demand in methods |
dea4d055 | 119 | defined on `slot-unbound'.")) |
1f1d88f5 MW |
120 | |
121 | (defmethod shared-initialize :after | |
122 | ((method basic-direct-method) slot-names &key pset) | |
123 | (declare (ignore slot-names)) | |
124 | (default-slot (method 'role) (get-property pset :role :keyword nil))) | |
125 | ||
126 | (defmethod slot-unbound | |
127 | (class (method basic-direct-method) (slot-name (eql 'function-type))) | |
128 | (let ((type (sod-method-type method))) | |
129 | (setf (slot-value method 'function-type) | |
130 | (c-type (fun (lisp (c-type-subtype type)) | |
131 | ("me" (* (class (sod-method-class method)))) | |
132 | . (c-function-arguments type)))))) | |
133 | ||
ddee4bb1 | 134 | (defmethod sod-method-function-name ((method basic-direct-method)) |
1f1d88f5 MW |
135 | (with-slots (class role message) method |
136 | (format nil "~A__~@[~(~A~)_~]method_~A__~A" class role | |
137 | (sod-class-nickname (sod-message-class message)) | |
138 | (sod-message-name message)))) | |
139 | ||
dea4d055 | 140 | (export 'daemon-direct-method) |
1f1d88f5 MW |
141 | (defclass daemon-direct-method (basic-direct-method) |
142 | () | |
143 | (:documentation | |
144 | "A daemon direct method is invoked for side effects and cannot override. | |
145 | ||
146 | This is the direct method class for `before' and `after' methods, which | |
147 | cannot choose to override the remaining methods and are not involved in | |
148 | the computation of the final result. | |
149 | ||
150 | In C terms, a daemon method must return `void', and is not passed a | |
151 | `next_method' pointer.")) | |
152 | ||
dea4d055 MW |
153 | (defmethod check-method-type ((method daemon-direct-method) |
154 | (message sod-message) | |
155 | (type c-function-type)) | |
1f1d88f5 MW |
156 | (with-slots ((msgtype type)) message |
157 | (unless (c-type-equal-p (c-type-subtype type) (c-type void)) | |
158 | (error "Method return type ~A must be `void'" (c-type-subtype type))) | |
159 | (unless (argument-lists-compatible-p (c-function-arguments msgtype) | |
160 | (c-function-arguments type)) | |
161 | (error "Method arguments ~A don't match message ~A" type msgtype)))) | |
162 | ||
dea4d055 | 163 | (export 'delegating-direct-method) |
1f1d88f5 MW |
164 | (defclass delegating-direct-method (basic-direct-method) |
165 | ((next-method-type :type c-function-type | |
166 | :reader sod-method-next-method-type)) | |
167 | (:documentation | |
168 | "A delegating direct method can choose to override other methods. | |
169 | ||
170 | This is the direct method class for `around' and standard-method- | |
171 | combination primary methods, which are given the choice of computing the | |
172 | entire method's result or delegating to (usually) less-specific methods. | |
173 | ||
174 | In C terms, a delegating method is passed a `next_method' pointer so that | |
175 | it can delegate part of its behaviour. (A delegating direct method for a | |
176 | varargs message is also given an additional `va_list' argument, | |
177 | conventionally named `sod__ap_master', which it is expected to pass on to | |
178 | its `next_method' function if necessary.) | |
179 | ||
bf090e02 | 180 | The function type protocol is implemented on `delegating-direct-method' |
1f1d88f5 | 181 | using slot reader methods. The actual values are computed on demand in |
bf090e02 | 182 | methods defined on `slot-unbound'.")) |
1f1d88f5 MW |
183 | |
184 | (defmethod slot-unbound (class | |
185 | (method delegating-direct-method) | |
186 | (slot-name (eql 'next-method-type))) | |
187 | (let* ((message (sod-method-message method)) | |
188 | (type (sod-message-type message))) | |
189 | (setf (slot-value method 'next-method-type) | |
190 | (c-type (fun (lisp (c-type-subtype type)) | |
191 | ("me" (* (class (sod-method-class method)))) | |
192 | . (c-function-arguments type)))))) | |
193 | ||
194 | (defmethod slot-unbound (class | |
195 | (method delegating-direct-method) | |
196 | (slot-name (eql 'function-type))) | |
197 | (let* ((message (sod-method-message method)) | |
198 | (type (sod-method-type method)) | |
199 | (method-args (c-function-arguments type))) | |
200 | (setf (slot-value method 'function-type) | |
201 | (c-type (fun (lisp (c-type-subtype type)) | |
202 | ("me" (* (class (sod-method-class method)))) | |
203 | ("next_method" (* (lisp (commentify-function-type | |
204 | (sod-method-next-method-type | |
205 | method))))) | |
bf090e02 MW |
206 | . |
207 | (if (varargs-message-p message) | |
208 | (cons (make-argument *sod-master-ap* | |
209 | (c-type va-list)) | |
210 | method-args) | |
211 | method-args)))))) | |
1f1d88f5 MW |
212 | |
213 | ;;;-------------------------------------------------------------------------- | |
214 | ;;; Effective method classes. | |
215 | ||
dea4d055 | 216 | (export 'basic-effective-method) |
1f1d88f5 | 217 | (defclass basic-effective-method (effective-method) |
77027cca MW |
218 | ((around-methods :initarg :around-methods :initform nil |
219 | :type list :reader effective-method-around-methods) | |
220 | (before-methods :initarg :before-methods :initform nil | |
221 | :type list :reader effective-method-before-methods) | |
222 | (after-methods :initarg :after-methods :initform nil | |
223 | :type list :reader effective-method-after-methods) | |
1f1d88f5 MW |
224 | (basic-argument-names :type list |
225 | :reader effective-method-basic-argument-names) | |
226 | (functions :type list :reader effective-method-functions)) | |
227 | (:documentation | |
228 | "Base class for built-in effective method classes. | |
229 | ||
230 | This class maintains lists of the applicable `before', `after' and | |
231 | `around' methods and provides behaviour for invoking these methods | |
232 | correctly. | |
233 | ||
dea4d055 MW |
234 | The argument names protocol is implemented on `basic-effective-method' |
235 | using a slot reader method. The actual values are computed on demand in | |
236 | methods defined on `slot-unbound'.")) | |
1f1d88f5 MW |
237 | |
238 | (defmethod slot-unbound (class | |
239 | (method basic-effective-method) | |
240 | (slot-name (eql 'basic-argument-names))) | |
241 | (let ((message (effective-method-message method))) | |
242 | (setf (slot-value method 'basic-argument-names) | |
243 | (subst *sod-master-ap* *sod-ap* | |
244 | (mapcar #'argument-name | |
245 | (sod-message-no-varargs-tail message)))))) | |
246 | ||
dea4d055 MW |
247 | (defmethod effective-method-function-name ((method effective-method)) |
248 | (let* ((class (effective-method-class method)) | |
249 | (message (effective-method-message method)) | |
250 | (message-class (sod-message-class message))) | |
251 | (format nil "~A__emethod_~A__~A" | |
252 | class | |
253 | (sod-class-nickname message-class) | |
254 | (sod-message-name message)))) | |
1f1d88f5 | 255 | |
dea4d055 MW |
256 | (defmethod slot-unbound |
257 | (class (method basic-effective-method) (slot-name (eql 'functions))) | |
258 | (setf (slot-value method 'functions) | |
259 | (compute-method-entry-functions method))) | |
1f1d88f5 | 260 | |
dea4d055 MW |
261 | (export 'simple-effective-method) |
262 | (defclass simple-effective-method (basic-effective-method) | |
263 | ((primary-methods :initarg :primary-methods :initform nil | |
264 | :type list :reader effective-method-primary-methods)) | |
1f1d88f5 | 265 | (:documentation |
dea4d055 | 266 | "Effective method counterpart to `simple-message'.")) |
1f1d88f5 | 267 | |
dea4d055 MW |
268 | (defmethod shared-initialize :after |
269 | ((method simple-effective-method) slot-names &key direct-methods) | |
270 | (declare (ignore slot-names)) | |
271 | (categorize (method direct-methods :bind ((role (sod-method-role method)))) | |
272 | ((primary (null role)) | |
273 | (before (eq role :before)) | |
274 | (after (eq role :after)) | |
275 | (around (eq role :around))) | |
276 | (with-slots (primary-methods before-methods after-methods around-methods) | |
277 | method | |
278 | (setf primary-methods primary | |
279 | before-methods before | |
280 | after-methods (reverse after) | |
281 | around-methods around)))) | |
282 | ||
283 | ;;;-------------------------------------------------------------------------- | |
284 | ;;; Code generation. | |
1f1d88f5 MW |
285 | |
286 | (defmethod shared-initialize :after | |
287 | ((codegen method-codegen) slot-names &key) | |
288 | (with-slots (message target) codegen | |
289 | (setf target | |
290 | (if (eq (c-type-subtype (sod-message-type message)) (c-type void)) | |
291 | :void | |
292 | :return)))) | |
293 | ||
dea4d055 MW |
294 | ;;;-------------------------------------------------------------------------- |
295 | ;;; Invoking direct methods. | |
1f1d88f5 | 296 | |
dea4d055 | 297 | (export 'basic-effective-method-body) |
1f1d88f5 MW |
298 | (defun basic-effective-method-body (codegen target method body) |
299 | "Build the common method-invocation structure. | |
300 | ||
301 | Writes to CODEGEN some basic method-invocation instructions. It invokes | |
302 | the `around' methods, from most- to least-specific. If they all delegate, | |
303 | then the `before' methods are run, most-specific first; next, the | |
304 | instructions generated by BODY (invoked with a target argument); then, the | |
305 | `after' methods are run, least-specific first; and, finally, the value | |
306 | delivered by the BODY is returned to the `around' methods. The result | |
307 | returned by the outermost `around' method -- or, if there are none, | |
308 | delivered by the BODY -- is finally delivered to the TARGET." | |
309 | ||
310 | (with-slots (message class before-methods after-methods around-methods) | |
311 | method | |
312 | (let* ((message-type (sod-message-type message)) | |
313 | (return-type (c-type-subtype message-type)) | |
314 | (voidp (eq return-type (c-type void))) | |
315 | (basic-tail (effective-method-basic-argument-names method))) | |
316 | (flet ((method-kernel (target) | |
317 | (dolist (before before-methods) | |
318 | (invoke-method codegen :void basic-tail before)) | |
319 | (if (or voidp (null after-methods)) | |
320 | (funcall body target) | |
321 | (convert-stmts codegen target return-type | |
322 | (lambda (target) | |
323 | (funcall body target) | |
324 | (dolist (after (reverse after-methods)) | |
325 | (invoke-method codegen :void | |
326 | after basic-tail))))))) | |
327 | (invoke-delegation-chain codegen target basic-tail | |
328 | around-methods #'method-kernel))))) | |
329 | ||
330 | ;;;-------------------------------------------------------------------------- | |
dea4d055 | 331 | ;;; Method entry points. |
1f1d88f5 | 332 | |
a07d8d00 | 333 | (defparameter *method-entry-inline-threshold* 200 |
1f1d88f5 MW |
334 | "Threshold below which effective method bodies are inlined into entries. |
335 | ||
336 | After the effective method body has been computed, we calculate its | |
337 | metric, multiply by the number of entries we need to generate, and compare | |
338 | it with this threshold. If the metric is below the threshold then we | |
339 | fold the method body into the entry functions; otherwise we split the | |
340 | effective method out into its own function.") | |
341 | ||
1f1d88f5 MW |
342 | (defmethod method-entry-function-name |
343 | ((method effective-method) (chain-head sod-class)) | |
344 | (let* ((class (effective-method-class method)) | |
345 | (message (effective-method-message method)) | |
346 | (message-class (sod-message-class message))) | |
dea4d055 MW |
347 | (if (or (not (slot-boundp method 'functions)) |
348 | (slot-value method 'functions)) | |
349 | (format nil "~A__mentry_~A__~A__chain_~A" | |
350 | class | |
351 | (sod-class-nickname message-class) | |
352 | (sod-message-name message) | |
353 | (sod-class-nickname chain-head)) | |
354 | 0))) | |
355 | ||
356 | (defmethod method-entry-function-type ((entry method-entry)) | |
357 | (let* ((method (method-entry-effective-method entry)) | |
358 | (message (effective-method-message method)) | |
359 | (type (sod-message-type message))) | |
360 | (c-type (fun (lisp (c-type-subtype type)) | |
361 | ("me" (* (class (method-entry-chain-tail entry)))) | |
362 | . (sod-message-argument-tail message))))) | |
363 | ||
364 | (defmethod make-method-entry ((method basic-effective-method) | |
365 | (chain-head sod-class) (chain-tail sod-class)) | |
366 | (make-instance 'method-entry | |
367 | :method method | |
368 | :chain-head chain-head | |
369 | :chain-tail chain-tail)) | |
1f1d88f5 MW |
370 | |
371 | (defmethod compute-method-entry-functions ((method basic-effective-method)) | |
372 | ||
373 | ;; OK, there's quite a lot of this, so hold tight. | |
374 | ;; | |
375 | ;; The first thing we need to do is find all of the related objects. This | |
376 | ;; is a bit verbose but fairly straightforward. | |
377 | ;; | |
bf090e02 MW |
378 | ;; Next, we generate the effective method body -- using `compute-effective- |
379 | ;; method-body' of all things. This gives us the declarations and body for | |
1f1d88f5 MW |
380 | ;; an effective method function, but we don't have an actual function yet. |
381 | ;; | |
382 | ;; Now we look at the chains which are actually going to need a method | |
383 | ;; entry: only those chains whose tail (most specific) class is a | |
384 | ;; superclass of the class which defined the message need an entry. We | |
385 | ;; build a list of these tail classes. | |
386 | ;; | |
387 | ;; Having done this, we decide whether it's better to generate a standalone | |
388 | ;; effective-method function and call it from each of the method entries, | |
389 | ;; or to inline the effective method body into each of the entries. | |
390 | ;; | |
391 | ;; Most of the complexity here comes from (a) dealing with the two | |
392 | ;; different strategies for constructing method entry functions and (b) | |
393 | ;; (unsurprisingly) the mess involved with dealing with varargs messages. | |
394 | ||
395 | (let* ((message (effective-method-message method)) | |
396 | (class (effective-method-class method)) | |
397 | (message-class (sod-message-class message)) | |
398 | (return-type (c-type-subtype (sod-message-type message))) | |
399 | (codegen (make-instance 'method-codegen | |
400 | :message message | |
401 | :class class | |
402 | :method method)) | |
403 | ||
404 | ;; Effective method function details. | |
405 | (emf-name (effective-method-function-name method)) | |
406 | (ilayout-type (c-type (* (struct (ilayout-struct-tag class))))) | |
407 | (emf-arg-tail (mapcar (lambda (arg) | |
408 | (if (eq (argument-name arg) *sod-ap*) | |
409 | (make-argument *sod-master-ap* | |
410 | (c-type va-list)) | |
411 | arg)) | |
412 | (sod-message-no-varargs-tail message))) | |
413 | (emf-type (c-type (fun (lisp return-type) | |
414 | ("sod__obj" (lisp ilayout-type)) | |
415 | . (sod-message-no-varargs-tail message)))) | |
416 | (result (if (eq return-type (c-type void)) nil | |
417 | (temporary-var codegen return-type))) | |
418 | (emf-target (or result :void)) | |
419 | ||
420 | ;; Method entry details. | |
421 | (chain-tails (remove-if-not (lambda (super) | |
422 | (sod-subclass-p super message-class)) | |
423 | (mapcar #'car | |
424 | (sod-class-chains class)))) | |
425 | (n-entries (length chain-tails)) | |
426 | (entry-args (sod-message-argument-tail message)) | |
427 | (parm-n (do ((prev "me" (car args)) | |
428 | (args entry-args (cdr args))) | |
429 | ((endp args) nil) | |
430 | (when (eq (car args) :ellipsis) | |
431 | (return prev)))) | |
432 | (entry-target (codegen-target codegen))) | |
433 | ||
dea4d055 MW |
434 | (flet ((setup-entry (tail) |
435 | (let ((head (sod-class-chain-head tail))) | |
436 | (codegen-push codegen) | |
437 | (ensure-var codegen "sod__obj" ilayout-type | |
438 | (make-convert-to-ilayout-inst class | |
439 | head "me")))) | |
440 | (varargs-prologue () | |
441 | (ensure-var codegen *sod-master-ap* (c-type va-list)) | |
442 | (emit-inst codegen | |
443 | (make-va-start-inst *sod-master-ap* parm-n))) | |
444 | (varargs-epilogue () | |
445 | (emit-inst codegen (make-va-end-inst *sod-master-ap*))) | |
446 | (finish-entry (tail) | |
447 | (let* ((head (sod-class-chain-head tail)) | |
448 | (name (method-entry-function-name method head)) | |
449 | (type (c-type (fun (lisp return-type) | |
450 | ("me" (* (class tail))) | |
451 | . entry-args)))) | |
452 | (codegen-pop-function codegen name type)))) | |
1f1d88f5 MW |
453 | |
454 | ;; Generate the method body. We'll work out what to do with it later. | |
455 | (codegen-push codegen) | |
456 | (compute-effective-method-body method codegen emf-target) | |
457 | (multiple-value-bind (vars insts) (codegen-pop codegen) | |
458 | (cond ((or (= n-entries 1) | |
459 | (<= (* n-entries (reduce #'+ insts :key #'inst-metric)) | |
460 | *method-entry-inline-threshold*)) | |
461 | ||
462 | ;; The effective method body is simple -- or there's only one | |
463 | ;; of them. We'll inline the method body into the entry | |
464 | ;; functions. | |
465 | (dolist (tail chain-tails) | |
466 | (setup-entry tail) | |
467 | (dolist (var vars) | |
468 | (ensure-var codegen (inst-name var) | |
469 | (inst-type var) (inst-init var))) | |
470 | (when parm-n (varargs-prologue)) | |
471 | (emit-insts codegen insts) | |
472 | (when parm-n (varargs-epilogue)) | |
473 | (deliver-expr codegen entry-target result) | |
474 | (finish-entry tail))) | |
475 | ||
476 | (t | |
477 | ||
478 | ;; The effective method body is complicated and we'd need more | |
479 | ;; than one copy. We'll generate an effective method function | |
480 | ;; and call it a lot. | |
481 | (codegen-build-function codegen emf-name emf-type vars | |
482 | (nconc insts (and result (list (make-return-inst result))))) | |
483 | ||
484 | (let ((call (make-call-inst emf-name | |
485 | (cons "sod__obj" (mapcar #'argument-name | |
486 | emf-arg-tail))))) | |
487 | (dolist (tail chain-tails) | |
488 | (setup-entry tail) | |
489 | (cond (parm-n | |
490 | (varargs-prologue) | |
491 | (convert-stmts codegen entry-target return-type | |
492 | (lambda (target) | |
493 | (deliver-expr codegen target call) | |
494 | (varargs-epilogue)))) | |
495 | (t | |
496 | (deliver-expr codegen entry-target call))) | |
497 | (finish-entry tail)))))) | |
498 | ||
499 | (codegen-functions codegen)))) | |
500 | ||
dea4d055 MW |
501 | (defmethod compute-method-entry-functions |
502 | ((method simple-effective-method)) | |
503 | (if (effective-method-primary-methods method) | |
504 | (call-next-method) | |
505 | nil)) | |
506 | ||
507 | (defmethod compute-effective-method-body | |
508 | ((method simple-effective-method) codegen target) | |
509 | (with-slots (message basic-argument-names primary-methods) method | |
510 | (basic-effective-method-body codegen target method | |
511 | (lambda (target) | |
512 | (simple-method-body method | |
513 | codegen | |
514 | target))))) | |
1f1d88f5 | 515 | |
dea4d055 MW |
516 | ;;;-------------------------------------------------------------------------- |
517 | ;;; Standard method combination. | |
ddee4bb1 | 518 | |
dea4d055 MW |
519 | (export 'standard-message) |
520 | (defclass standard-message (simple-message) | |
521 | () | |
522 | (:documentation | |
523 | "Message class for standard method combination. | |
1f1d88f5 | 524 | |
dea4d055 MW |
525 | Standard method combination is a simple method combination where the |
526 | primary methods are invoked as a delegation chain, from most- to | |
527 | least-specific.")) | |
528 | ||
529 | (export 'standard-effective-method) | |
530 | (defclass standard-effective-method (simple-effective-method) () | |
531 | (:documentation "Effective method counterpart to `standard-message'.")) | |
532 | ||
533 | (defmethod primary-method-class ((message standard-message)) | |
534 | 'delegating-direct-method) | |
535 | ||
536 | (defmethod message-effective-method-class ((message standard-message)) | |
537 | 'standard-effective-method) | |
538 | ||
539 | (defmethod simple-method-body | |
540 | ((method standard-effective-method) codegen target) | |
541 | (invoke-delegation-chain codegen | |
542 | target | |
543 | (effective-method-basic-argument-names method) | |
544 | (effective-method-primary-methods method) | |
545 | nil)) | |
a07d8d00 | 546 | |
1f1d88f5 | 547 | ;;;----- That's all, folks -------------------------------------------------- |