Mercurial > projects > ldc
comparison dmd2/template.c @ 758:f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 11 Nov 2008 01:38:48 +0100 |
parents | |
children | 356e65836fb5 |
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757:2c730d530c98 | 758:f04dde6e882c |
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1 | |
2 // Compiler implementation of the D programming language | |
3 // Copyright (c) 1999-2008 by Digital Mars | |
4 // All Rights Reserved | |
5 // written by Walter Bright | |
6 // http://www.digitalmars.com | |
7 // License for redistribution is by either the Artistic License | |
8 // in artistic.txt, or the GNU General Public License in gnu.txt. | |
9 // See the included readme.txt for details. | |
10 | |
11 // Handle template implementation | |
12 | |
13 #include <stdio.h> | |
14 #include <assert.h> | |
15 | |
16 #if !IN_LLVM | |
17 #if _WIN32 | |
18 #include <windows.h> | |
19 long __cdecl __ehfilter(LPEXCEPTION_POINTERS ep); | |
20 #endif | |
21 #endif | |
22 | |
23 #include "root.h" | |
24 #include "mem.h" | |
25 #include "stringtable.h" | |
26 #include "mars.h" | |
27 #include "identifier.h" | |
28 #include "mtype.h" | |
29 #include "template.h" | |
30 #include "init.h" | |
31 #include "expression.h" | |
32 #include "scope.h" | |
33 #include "module.h" | |
34 #include "aggregate.h" | |
35 #include "declaration.h" | |
36 #include "dsymbol.h" | |
37 #include "hdrgen.h" | |
38 | |
39 #define LOG 0 | |
40 | |
41 /******************************************** | |
42 * These functions substitute for dynamic_cast. dynamic_cast does not work | |
43 * on earlier versions of gcc. | |
44 */ | |
45 | |
46 Expression *isExpression(Object *o) | |
47 { | |
48 //return dynamic_cast<Expression *>(o); | |
49 if (!o || o->dyncast() != DYNCAST_EXPRESSION) | |
50 return NULL; | |
51 return (Expression *)o; | |
52 } | |
53 | |
54 Dsymbol *isDsymbol(Object *o) | |
55 { | |
56 //return dynamic_cast<Dsymbol *>(o); | |
57 if (!o || o->dyncast() != DYNCAST_DSYMBOL) | |
58 return NULL; | |
59 return (Dsymbol *)o; | |
60 } | |
61 | |
62 Type *isType(Object *o) | |
63 { | |
64 //return dynamic_cast<Type *>(o); | |
65 if (!o || o->dyncast() != DYNCAST_TYPE) | |
66 return NULL; | |
67 return (Type *)o; | |
68 } | |
69 | |
70 Tuple *isTuple(Object *o) | |
71 { | |
72 //return dynamic_cast<Tuple *>(o); | |
73 if (!o || o->dyncast() != DYNCAST_TUPLE) | |
74 return NULL; | |
75 return (Tuple *)o; | |
76 } | |
77 | |
78 | |
79 /*********************** | |
80 * Try to get arg as a type. | |
81 */ | |
82 | |
83 Type *getType(Object *o) | |
84 { | |
85 Type *t = isType(o); | |
86 if (!t) | |
87 { Expression *e = isExpression(o); | |
88 if (e) | |
89 t = e->type; | |
90 } | |
91 return t; | |
92 } | |
93 | |
94 Dsymbol *getDsymbol(Object *oarg) | |
95 { | |
96 Dsymbol *sa; | |
97 Expression *ea = isExpression(oarg); | |
98 if (ea) | |
99 { // Try to convert Expression to symbol | |
100 if (ea->op == TOKvar) | |
101 sa = ((VarExp *)ea)->var; | |
102 else if (ea->op == TOKfunction) | |
103 sa = ((FuncExp *)ea)->fd; | |
104 else | |
105 sa = NULL; | |
106 } | |
107 else | |
108 { // Try to convert Type to symbol | |
109 Type *ta = isType(oarg); | |
110 if (ta) | |
111 sa = ta->toDsymbol(NULL); | |
112 else | |
113 sa = isDsymbol(oarg); // if already a symbol | |
114 } | |
115 return sa; | |
116 } | |
117 | |
118 /****************************** | |
119 * If o1 matches o2, return 1. | |
120 * Else, return 0. | |
121 */ | |
122 | |
123 int match(Object *o1, Object *o2, TemplateDeclaration *tempdecl, Scope *sc) | |
124 { | |
125 Type *t1 = isType(o1); | |
126 Type *t2 = isType(o2); | |
127 Expression *e1 = isExpression(o1); | |
128 Expression *e2 = isExpression(o2); | |
129 Dsymbol *s1 = isDsymbol(o1); | |
130 Dsymbol *s2 = isDsymbol(o2); | |
131 Tuple *v1 = isTuple(o1); | |
132 Tuple *v2 = isTuple(o2); | |
133 | |
134 //printf("\t match t1 %p t2 %p, e1 %p e2 %p, s1 %p s2 %p, v1 %p v2 %p\n", t1,t2,e1,e2,s1,s2,v1,v2); | |
135 | |
136 /* A proper implementation of the various equals() overrides | |
137 * should make it possible to just do o1->equals(o2), but | |
138 * we'll do that another day. | |
139 */ | |
140 | |
141 if (t1) | |
142 { | |
143 /* if t1 is an instance of ti, then give error | |
144 * about recursive expansions. | |
145 */ | |
146 Dsymbol *s = t1->toDsymbol(sc); | |
147 if (s && s->parent) | |
148 { TemplateInstance *ti1 = s->parent->isTemplateInstance(); | |
149 if (ti1 && ti1->tempdecl == tempdecl) | |
150 { | |
151 for (Scope *sc1 = sc; sc1; sc1 = sc1->enclosing) | |
152 { | |
153 if (sc1->scopesym == ti1) | |
154 { | |
155 error("recursive template expansion for template argument %s", t1->toChars()); | |
156 return 1; // fake a match | |
157 } | |
158 } | |
159 } | |
160 } | |
161 | |
162 if (!t2 || !t1->equals(t2)) | |
163 goto Lnomatch; | |
164 } | |
165 else if (e1) | |
166 { | |
167 #if 0 | |
168 if (e1 && e2) | |
169 { | |
170 printf("match %d\n", e1->equals(e2)); | |
171 e1->print(); | |
172 e2->print(); | |
173 e1->type->print(); | |
174 e2->type->print(); | |
175 } | |
176 #endif | |
177 if (!e2) | |
178 goto Lnomatch; | |
179 if (!e1->equals(e2)) | |
180 goto Lnomatch; | |
181 } | |
182 else if (s1) | |
183 { | |
184 //printf("%p %s, %p %s\n", s1, s1->toChars(), s2, s2->toChars()); | |
185 if (!s2 || !s1->equals(s2) || s1->parent != s2->parent) | |
186 { | |
187 goto Lnomatch; | |
188 } | |
189 VarDeclaration *v1 = s1->isVarDeclaration(); | |
190 VarDeclaration *v2 = s2->isVarDeclaration(); | |
191 if (v1 && v2 && v1->storage_class & v2->storage_class & STCmanifest) | |
192 { ExpInitializer *ei1 = v1->init->isExpInitializer(); | |
193 ExpInitializer *ei2 = v2->init->isExpInitializer(); | |
194 if (ei1 && ei2 && !ei1->exp->equals(ei2->exp)) | |
195 goto Lnomatch; | |
196 } | |
197 } | |
198 else if (v1) | |
199 { | |
200 if (!v2) | |
201 goto Lnomatch; | |
202 if (v1->objects.dim != v2->objects.dim) | |
203 goto Lnomatch; | |
204 for (size_t i = 0; i < v1->objects.dim; i++) | |
205 { | |
206 if (!match((Object *)v1->objects.data[i], | |
207 (Object *)v2->objects.data[i], | |
208 tempdecl, sc)) | |
209 goto Lnomatch; | |
210 } | |
211 } | |
212 //printf("match\n"); | |
213 return 1; // match | |
214 Lnomatch: | |
215 //printf("nomatch\n"); | |
216 return 0; // nomatch; | |
217 } | |
218 | |
219 /**************************************** | |
220 */ | |
221 | |
222 void ObjectToCBuffer(OutBuffer *buf, HdrGenState *hgs, Object *oarg) | |
223 { | |
224 //printf("ObjectToCBuffer()\n"); | |
225 Type *t = isType(oarg); | |
226 Expression *e = isExpression(oarg); | |
227 Dsymbol *s = isDsymbol(oarg); | |
228 Tuple *v = isTuple(oarg); | |
229 if (t) | |
230 { //printf("\tt: %s ty = %d\n", t->toChars(), t->ty); | |
231 t->toCBuffer(buf, NULL, hgs); | |
232 } | |
233 else if (e) | |
234 e->toCBuffer(buf, hgs); | |
235 else if (s) | |
236 { | |
237 char *p = s->ident ? s->ident->toChars() : s->toChars(); | |
238 buf->writestring(p); | |
239 } | |
240 else if (v) | |
241 { | |
242 Objects *args = &v->objects; | |
243 for (size_t i = 0; i < args->dim; i++) | |
244 { | |
245 if (i) | |
246 buf->writeByte(','); | |
247 Object *o = (Object *)args->data[i]; | |
248 ObjectToCBuffer(buf, hgs, o); | |
249 } | |
250 } | |
251 else if (!oarg) | |
252 { | |
253 buf->writestring("NULL"); | |
254 } | |
255 else | |
256 { | |
257 #ifdef DEBUG | |
258 printf("bad Object = %p\n", oarg); | |
259 #endif | |
260 assert(0); | |
261 } | |
262 } | |
263 | |
264 Object *objectSyntaxCopy(Object *o) | |
265 { | |
266 if (!o) | |
267 return NULL; | |
268 Type *t = isType(o); | |
269 if (t) | |
270 return t->syntaxCopy(); | |
271 Expression *e = isExpression(o); | |
272 if (e) | |
273 return e->syntaxCopy(); | |
274 return o; | |
275 } | |
276 | |
277 | |
278 /* ======================== TemplateDeclaration ============================= */ | |
279 | |
280 TemplateDeclaration::TemplateDeclaration(Loc loc, Identifier *id, | |
281 TemplateParameters *parameters, Expression *constraint, Array *decldefs) | |
282 : ScopeDsymbol(id) | |
283 { | |
284 #if LOG | |
285 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id->toChars()); | |
286 #endif | |
287 #if 0 | |
288 if (parameters) | |
289 for (int i = 0; i < parameters->dim; i++) | |
290 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
291 //printf("\tparameter[%d] = %p\n", i, tp); | |
292 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
293 | |
294 if (ttp) | |
295 { | |
296 printf("\tparameter[%d] = %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : ""); | |
297 } | |
298 } | |
299 #endif | |
300 this->loc = loc; | |
301 this->parameters = parameters; | |
302 this->origParameters = parameters; | |
303 this->constraint = constraint; | |
304 this->members = decldefs; | |
305 this->overnext = NULL; | |
306 this->overroot = NULL; | |
307 this->scope = NULL; | |
308 this->onemember = NULL; | |
309 } | |
310 | |
311 Dsymbol *TemplateDeclaration::syntaxCopy(Dsymbol *) | |
312 { | |
313 //printf("TemplateDeclaration::syntaxCopy()\n"); | |
314 TemplateDeclaration *td; | |
315 TemplateParameters *p; | |
316 Array *d; | |
317 | |
318 p = NULL; | |
319 if (parameters) | |
320 { | |
321 p = new TemplateParameters(); | |
322 p->setDim(parameters->dim); | |
323 for (int i = 0; i < p->dim; i++) | |
324 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
325 p->data[i] = (void *)tp->syntaxCopy(); | |
326 } | |
327 } | |
328 Expression *e = NULL; | |
329 if (constraint) | |
330 e = constraint->syntaxCopy(); | |
331 d = Dsymbol::arraySyntaxCopy(members); | |
332 td = new TemplateDeclaration(loc, ident, p, e, d); | |
333 | |
334 // LDC | |
335 td->intrinsicName = intrinsicName; | |
336 | |
337 return td; | |
338 } | |
339 | |
340 void TemplateDeclaration::semantic(Scope *sc) | |
341 { | |
342 #if LOG | |
343 printf("TemplateDeclaration::semantic(this = %p, id = '%s')\n", this, ident->toChars()); | |
344 #endif | |
345 if (scope) | |
346 return; // semantic() already run | |
347 | |
348 if (sc->func) | |
349 { | |
350 // error("cannot declare template at function scope %s", sc->func->toChars()); | |
351 } | |
352 | |
353 if (/*global.params.useArrayBounds &&*/ sc->module) | |
354 { | |
355 // Generate this function as it may be used | |
356 // when template is instantiated in other modules | |
357 sc->module->toModuleArray(); | |
358 } | |
359 | |
360 if (/*global.params.useAssert &&*/ sc->module) | |
361 { | |
362 // Generate this function as it may be used | |
363 // when template is instantiated in other modules | |
364 sc->module->toModuleAssert(); | |
365 } | |
366 | |
367 /* Remember Scope for later instantiations, but make | |
368 * a copy since attributes can change. | |
369 */ | |
370 this->scope = new Scope(*sc); | |
371 this->scope->setNoFree(); | |
372 | |
373 // Set up scope for parameters | |
374 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
375 paramsym->parent = sc->parent; | |
376 Scope *paramscope = sc->push(paramsym); | |
377 paramscope->parameterSpecialization = 1; | |
378 | |
379 if (global.params.doDocComments) | |
380 { | |
381 origParameters = new TemplateParameters(); | |
382 origParameters->setDim(parameters->dim); | |
383 for (int i = 0; i < parameters->dim; i++) | |
384 { | |
385 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
386 origParameters->data[i] = (void *)tp->syntaxCopy(); | |
387 } | |
388 } | |
389 | |
390 for (int i = 0; i < parameters->dim; i++) | |
391 { | |
392 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
393 | |
394 tp->declareParameter(paramscope); | |
395 } | |
396 | |
397 for (int i = 0; i < parameters->dim; i++) | |
398 { | |
399 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
400 | |
401 tp->semantic(paramscope); | |
402 if (i + 1 != parameters->dim && tp->isTemplateTupleParameter()) | |
403 error("template tuple parameter must be last one"); | |
404 } | |
405 | |
406 paramscope->pop(); | |
407 | |
408 if (members) | |
409 { | |
410 Dsymbol *s; | |
411 if (Dsymbol::oneMembers(members, &s)) | |
412 { | |
413 if (s && s->ident && s->ident->equals(ident)) | |
414 { | |
415 onemember = s; | |
416 s->parent = this; | |
417 } | |
418 } | |
419 } | |
420 | |
421 /* BUG: should check: | |
422 * o no virtual functions or non-static data members of classes | |
423 */ | |
424 } | |
425 | |
426 const char *TemplateDeclaration::kind() | |
427 { | |
428 return (onemember && onemember->isAggregateDeclaration()) | |
429 ? onemember->kind() | |
430 : (char *)"template"; | |
431 } | |
432 | |
433 /********************************** | |
434 * Overload existing TemplateDeclaration 'this' with the new one 's'. | |
435 * Return !=0 if successful; i.e. no conflict. | |
436 */ | |
437 | |
438 int TemplateDeclaration::overloadInsert(Dsymbol *s) | |
439 { | |
440 TemplateDeclaration **pf; | |
441 TemplateDeclaration *f; | |
442 | |
443 #if LOG | |
444 printf("TemplateDeclaration::overloadInsert('%s')\n", s->toChars()); | |
445 #endif | |
446 f = s->isTemplateDeclaration(); | |
447 if (!f) | |
448 return FALSE; | |
449 TemplateDeclaration *pthis = this; | |
450 for (pf = &pthis; *pf; pf = &(*pf)->overnext) | |
451 { | |
452 #if 0 | |
453 // Conflict if TemplateParameter's match | |
454 // Will get caught anyway later with TemplateInstance, but | |
455 // should check it now. | |
456 TemplateDeclaration *f2 = *pf; | |
457 | |
458 if (f->parameters->dim != f2->parameters->dim) | |
459 goto Lcontinue; | |
460 | |
461 for (int i = 0; i < f->parameters->dim; i++) | |
462 { TemplateParameter *p1 = (TemplateParameter *)f->parameters->data[i]; | |
463 TemplateParameter *p2 = (TemplateParameter *)f2->parameters->data[i]; | |
464 | |
465 if (!p1->overloadMatch(p2)) | |
466 goto Lcontinue; | |
467 } | |
468 | |
469 #if LOG | |
470 printf("\tfalse: conflict\n"); | |
471 #endif | |
472 return FALSE; | |
473 | |
474 Lcontinue: | |
475 ; | |
476 #endif | |
477 } | |
478 | |
479 f->overroot = this; | |
480 *pf = f; | |
481 #if LOG | |
482 printf("\ttrue: no conflict\n"); | |
483 #endif | |
484 return TRUE; | |
485 } | |
486 | |
487 /*************************************** | |
488 * Given that ti is an instance of this TemplateDeclaration, | |
489 * deduce the types of the parameters to this, and store | |
490 * those deduced types in dedtypes[]. | |
491 * Input: | |
492 * flag 1: don't do semantic() because of dummy types | |
493 * 2: don't change types in matchArg() | |
494 * Output: | |
495 * dedtypes deduced arguments | |
496 * Return match level. | |
497 */ | |
498 | |
499 MATCH TemplateDeclaration::matchWithInstance(TemplateInstance *ti, | |
500 Objects *dedtypes, int flag) | |
501 { MATCH m; | |
502 int dedtypes_dim = dedtypes->dim; | |
503 | |
504 #define LOGM 0 | |
505 #if LOGM | |
506 printf("\n+TemplateDeclaration::matchWithInstance(this = %s, ti = %s, flag = %d)\n", toChars(), ti->toChars(), flag); | |
507 #endif | |
508 | |
509 #if 0 | |
510 printf("dedtypes->dim = %d, parameters->dim = %d\n", dedtypes_dim, parameters->dim); | |
511 if (ti->tiargs->dim) | |
512 printf("ti->tiargs->dim = %d, [0] = %p\n", | |
513 ti->tiargs->dim, | |
514 ti->tiargs->data[0]); | |
515 #endif | |
516 dedtypes->zero(); | |
517 | |
518 int parameters_dim = parameters->dim; | |
519 int variadic = isVariadic() != NULL; | |
520 | |
521 // If more arguments than parameters, no match | |
522 if (ti->tiargs->dim > parameters_dim && !variadic) | |
523 { | |
524 #if LOGM | |
525 printf(" no match: more arguments than parameters\n"); | |
526 #endif | |
527 return MATCHnomatch; | |
528 } | |
529 | |
530 assert(dedtypes_dim == parameters_dim); | |
531 assert(dedtypes_dim >= ti->tiargs->dim || variadic); | |
532 | |
533 // Set up scope for parameters | |
534 assert((size_t)scope > 0x10000); | |
535 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
536 paramsym->parent = scope->parent; | |
537 Scope *paramscope = scope->push(paramsym); | |
538 | |
539 // Attempt type deduction | |
540 m = MATCHexact; | |
541 for (int i = 0; i < dedtypes_dim; i++) | |
542 { MATCH m2; | |
543 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
544 Declaration *sparam; | |
545 | |
546 //printf("\targument [%d]\n", i); | |
547 #if LOGM | |
548 //printf("\targument [%d] is %s\n", i, oarg ? oarg->toChars() : "null"); | |
549 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
550 if (ttp) | |
551 printf("\tparameter[%d] is %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : ""); | |
552 #endif | |
553 | |
554 #if DMDV1 | |
555 m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam); | |
556 #else | |
557 m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
558 | |
559 #endif | |
560 //printf("\tm2 = %d\n", m2); | |
561 | |
562 if (m2 == MATCHnomatch) | |
563 { | |
564 #if 0 | |
565 printf("\tmatchArg() for parameter %i failed\n", i); | |
566 #endif | |
567 goto Lnomatch; | |
568 } | |
569 | |
570 if (m2 < m) | |
571 m = m2; | |
572 | |
573 if (!flag) | |
574 sparam->semantic(paramscope); | |
575 if (!paramscope->insert(sparam)) | |
576 goto Lnomatch; | |
577 } | |
578 | |
579 if (!flag) | |
580 { | |
581 /* Any parameter left without a type gets the type of | |
582 * its corresponding arg | |
583 */ | |
584 for (int i = 0; i < dedtypes_dim; i++) | |
585 { | |
586 if (!dedtypes->data[i]) | |
587 { assert(i < ti->tiargs->dim); | |
588 dedtypes->data[i] = ti->tiargs->data[i]; | |
589 } | |
590 } | |
591 } | |
592 | |
593 if (m && constraint && !(flag & 1)) | |
594 { /* Check to see if constraint is satisfied. | |
595 */ | |
596 Expression *e = constraint->syntaxCopy(); | |
597 paramscope->flags |= SCOPEstaticif; | |
598 e = e->semantic(paramscope); | |
599 e = e->optimize(WANTvalue | WANTinterpret); | |
600 if (e->isBool(TRUE)) | |
601 ; | |
602 else if (e->isBool(FALSE)) | |
603 goto Lnomatch; | |
604 else | |
605 { | |
606 e->error("constraint %s is not constant or does not evaluate to a bool", e->toChars()); | |
607 } | |
608 } | |
609 | |
610 #if LOGM | |
611 // Print out the results | |
612 printf("--------------------------\n"); | |
613 printf("template %s\n", toChars()); | |
614 printf("instance %s\n", ti->toChars()); | |
615 if (m) | |
616 { | |
617 for (int i = 0; i < dedtypes_dim; i++) | |
618 { | |
619 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
620 Object *oarg; | |
621 | |
622 printf(" [%d]", i); | |
623 | |
624 if (i < ti->tiargs->dim) | |
625 oarg = (Object *)ti->tiargs->data[i]; | |
626 else | |
627 oarg = NULL; | |
628 tp->print(oarg, (Object *)dedtypes->data[i]); | |
629 } | |
630 } | |
631 else | |
632 goto Lnomatch; | |
633 #endif | |
634 | |
635 #if LOGM | |
636 printf(" match = %d\n", m); | |
637 #endif | |
638 goto Lret; | |
639 | |
640 Lnomatch: | |
641 #if LOGM | |
642 printf(" no match\n"); | |
643 #endif | |
644 m = MATCHnomatch; | |
645 | |
646 Lret: | |
647 paramscope->pop(); | |
648 #if LOGM | |
649 printf("-TemplateDeclaration::matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
650 #endif | |
651 return m; | |
652 } | |
653 | |
654 /******************************************** | |
655 * Determine partial specialization order of 'this' vs td2. | |
656 * Returns: | |
657 * match this is at least as specialized as td2 | |
658 * 0 td2 is more specialized than this | |
659 */ | |
660 | |
661 MATCH TemplateDeclaration::leastAsSpecialized(TemplateDeclaration *td2) | |
662 { | |
663 /* This works by taking the template parameters to this template | |
664 * declaration and feeding them to td2 as if it were a template | |
665 * instance. | |
666 * If it works, then this template is at least as specialized | |
667 * as td2. | |
668 */ | |
669 | |
670 TemplateInstance ti(0, ident); // create dummy template instance | |
671 Objects dedtypes; | |
672 | |
673 #define LOG_LEASTAS 0 | |
674 | |
675 #if LOG_LEASTAS | |
676 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2->toChars()); | |
677 #endif | |
678 | |
679 // Set type arguments to dummy template instance to be types | |
680 // generated from the parameters to this template declaration | |
681 ti.tiargs = new Objects(); | |
682 ti.tiargs->setDim(parameters->dim); | |
683 for (int i = 0; i < ti.tiargs->dim; i++) | |
684 { | |
685 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
686 | |
687 void *p = tp->dummyArg(); | |
688 if (p) | |
689 ti.tiargs->data[i] = p; | |
690 else | |
691 ti.tiargs->setDim(i); | |
692 } | |
693 | |
694 // Temporary Array to hold deduced types | |
695 //dedtypes.setDim(parameters->dim); | |
696 dedtypes.setDim(td2->parameters->dim); | |
697 | |
698 // Attempt a type deduction | |
699 MATCH m = td2->matchWithInstance(&ti, &dedtypes, 1); | |
700 if (m) | |
701 { | |
702 /* A non-variadic template is more specialized than a | |
703 * variadic one. | |
704 */ | |
705 if (isVariadic() && !td2->isVariadic()) | |
706 goto L1; | |
707 | |
708 #if LOG_LEASTAS | |
709 printf(" matches %d, so is least as specialized\n", m); | |
710 #endif | |
711 return m; | |
712 } | |
713 L1: | |
714 #if LOG_LEASTAS | |
715 printf(" doesn't match, so is not as specialized\n"); | |
716 #endif | |
717 return MATCHnomatch; | |
718 } | |
719 | |
720 | |
721 /************************************************* | |
722 * Match function arguments against a specific template function. | |
723 * Input: | |
724 * loc instantiation location | |
725 * targsi Expression/Type initial list of template arguments | |
726 * ethis 'this' argument if !NULL | |
727 * fargs arguments to function | |
728 * Output: | |
729 * dedargs Expression/Type deduced template arguments | |
730 * Returns: | |
731 * match level | |
732 */ | |
733 | |
734 MATCH TemplateDeclaration::deduceFunctionTemplateMatch(Loc loc, Objects *targsi, | |
735 Expression *ethis, Expressions *fargs, | |
736 Objects *dedargs) | |
737 { | |
738 size_t i; | |
739 size_t nfparams; | |
740 size_t nfargs; | |
741 size_t nargsi; // array size of targsi | |
742 int fptupindex = -1; | |
743 int tuple_dim = 0; | |
744 MATCH match = MATCHexact; | |
745 FuncDeclaration *fd = onemember->toAlias()->isFuncDeclaration(); | |
746 TypeFunction *fdtype; // type of fd | |
747 TemplateTupleParameter *tp; | |
748 Objects dedtypes; // for T:T*, the dedargs is the T*, dedtypes is the T | |
749 | |
750 #if 0 | |
751 printf("\nTemplateDeclaration::deduceFunctionTemplateMatch() %s\n", toChars()); | |
752 for (i = 0; i < fargs->dim; i++) | |
753 { Expression *e = (Expression *)fargs->data[i]; | |
754 printf("\tfarg[%d] is %s, type is %s\n", i, e->toChars(), e->type->toChars()); | |
755 } | |
756 #endif | |
757 | |
758 assert((size_t)scope > 0x10000); | |
759 | |
760 dedargs->setDim(parameters->dim); | |
761 dedargs->zero(); | |
762 | |
763 dedtypes.setDim(parameters->dim); | |
764 dedtypes.zero(); | |
765 | |
766 // Set up scope for parameters | |
767 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
768 paramsym->parent = scope->parent; | |
769 Scope *paramscope = scope->push(paramsym); | |
770 | |
771 tp = isVariadic(); | |
772 | |
773 nargsi = 0; | |
774 if (targsi) | |
775 { // Set initial template arguments | |
776 | |
777 nargsi = targsi->dim; | |
778 if (nargsi > parameters->dim) | |
779 { if (!tp) | |
780 goto Lnomatch; | |
781 dedargs->setDim(nargsi); | |
782 dedargs->zero(); | |
783 } | |
784 | |
785 memcpy(dedargs->data, targsi->data, nargsi * sizeof(*dedargs->data)); | |
786 | |
787 for (i = 0; i < nargsi; i++) | |
788 { assert(i < parameters->dim); | |
789 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
790 MATCH m; | |
791 Declaration *sparam; | |
792 | |
793 m = tp->matchArg(paramscope, dedargs, i, parameters, &dedtypes, &sparam); | |
794 //printf("\tdeduceType m = %d\n", m); | |
795 if (m == MATCHnomatch) | |
796 goto Lnomatch; | |
797 if (m < match) | |
798 match = m; | |
799 | |
800 sparam->semantic(paramscope); | |
801 if (!paramscope->insert(sparam)) | |
802 goto Lnomatch; | |
803 } | |
804 } | |
805 | |
806 assert(fd->type->ty == Tfunction); | |
807 fdtype = (TypeFunction *)fd->type; | |
808 | |
809 nfparams = Argument::dim(fdtype->parameters); // number of function parameters | |
810 nfargs = fargs->dim; // number of function arguments | |
811 | |
812 /* Check for match of function arguments with variadic template | |
813 * parameter, such as: | |
814 * | |
815 * template Foo(T, A...) { void Foo(T t, A a); } | |
816 * void main() { Foo(1,2,3); } | |
817 */ | |
818 if (tp) // if variadic | |
819 { | |
820 if (nfparams == 0) // if no function parameters | |
821 { | |
822 Tuple *t = new Tuple(); | |
823 //printf("t = %p\n", t); | |
824 dedargs->data[parameters->dim - 1] = (void *)t; | |
825 goto L2; | |
826 } | |
827 else if (nfargs < nfparams - 1) | |
828 goto L1; | |
829 else | |
830 { | |
831 /* Figure out which of the function parameters matches | |
832 * the tuple template parameter. Do this by matching | |
833 * type identifiers. | |
834 * Set the index of this function parameter to fptupindex. | |
835 */ | |
836 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
837 { | |
838 Argument *fparam = (Argument *)fdtype->parameters->data[fptupindex]; | |
839 if (fparam->type->ty != Tident) | |
840 continue; | |
841 TypeIdentifier *tid = (TypeIdentifier *)fparam->type; | |
842 if (!tp->ident->equals(tid->ident) || tid->idents.dim) | |
843 continue; | |
844 | |
845 if (fdtype->varargs) // variadic function doesn't | |
846 goto Lnomatch; // go with variadic template | |
847 | |
848 /* The types of the function arguments | |
849 * now form the tuple argument. | |
850 */ | |
851 Tuple *t = new Tuple(); | |
852 dedargs->data[parameters->dim - 1] = (void *)t; | |
853 | |
854 tuple_dim = nfargs - (nfparams - 1); | |
855 t->objects.setDim(tuple_dim); | |
856 for (i = 0; i < tuple_dim; i++) | |
857 { Expression *farg = (Expression *)fargs->data[fptupindex + i]; | |
858 t->objects.data[i] = (void *)farg->type; | |
859 } | |
860 goto L2; | |
861 } | |
862 fptupindex = -1; | |
863 } | |
864 } | |
865 | |
866 L1: | |
867 if (nfparams == nfargs) | |
868 ; | |
869 else if (nfargs > nfparams) | |
870 { | |
871 if (fdtype->varargs == 0) | |
872 goto Lnomatch; // too many args, no match | |
873 match = MATCHconvert; // match ... with a conversion | |
874 } | |
875 | |
876 L2: | |
877 // Match 'ethis' to any TemplateThisParameter's | |
878 if (ethis) | |
879 { | |
880 for (size_t i = 0; i < parameters->dim; i++) | |
881 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
882 TemplateThisParameter *ttp = tp->isTemplateThisParameter(); | |
883 if (ttp) | |
884 { MATCH m; | |
885 | |
886 Type *t = new TypeIdentifier(0, ttp->ident); | |
887 m = ethis->type->deduceType(scope, t, parameters, &dedtypes); | |
888 if (!m) | |
889 goto Lnomatch; | |
890 if (m < match) | |
891 match = m; // pick worst match | |
892 } | |
893 } | |
894 } | |
895 | |
896 // Loop through the function parameters | |
897 for (i = 0; i < nfparams; i++) | |
898 { | |
899 /* Skip over function parameters which wound up | |
900 * as part of a template tuple parameter. | |
901 */ | |
902 if (i == fptupindex) | |
903 { if (fptupindex == nfparams - 1) | |
904 break; | |
905 i += tuple_dim - 1; | |
906 continue; | |
907 } | |
908 | |
909 Argument *fparam = Argument::getNth(fdtype->parameters, i); | |
910 | |
911 if (i >= nfargs) // if not enough arguments | |
912 { | |
913 if (fparam->defaultArg) | |
914 { /* Default arguments do not participate in template argument | |
915 * deduction. | |
916 */ | |
917 goto Lmatch; | |
918 } | |
919 } | |
920 else | |
921 { Expression *farg = (Expression *)fargs->data[i]; | |
922 #if 0 | |
923 printf("\tfarg->type = %s\n", farg->type->toChars()); | |
924 printf("\tfparam->type = %s\n", fparam->type->toChars()); | |
925 #endif | |
926 MATCH m; | |
927 //m = farg->type->toHeadMutable()->deduceType(scope, fparam->type, parameters, &dedtypes); | |
928 m = farg->type->deduceType(scope, fparam->type, parameters, &dedtypes); | |
929 //printf("\tdeduceType m = %d\n", m); | |
930 | |
931 /* If no match, see if there's a conversion to a delegate | |
932 */ | |
933 if (!m && fparam->type->toBasetype()->ty == Tdelegate) | |
934 { | |
935 TypeDelegate *td = (TypeDelegate *)fparam->type->toBasetype(); | |
936 TypeFunction *tf = (TypeFunction *)td->next; | |
937 | |
938 if (!tf->varargs && Argument::dim(tf->parameters) == 0) | |
939 { | |
940 m = farg->type->deduceType(scope, tf->next, parameters, &dedtypes); | |
941 if (!m && tf->next->toBasetype()->ty == Tvoid) | |
942 m = MATCHconvert; | |
943 } | |
944 //printf("\tm2 = %d\n", m); | |
945 } | |
946 | |
947 if (m) | |
948 { if (m < match) | |
949 match = m; // pick worst match | |
950 continue; | |
951 } | |
952 } | |
953 | |
954 /* The following code for variadic arguments closely | |
955 * matches TypeFunction::callMatch() | |
956 */ | |
957 if (!(fdtype->varargs == 2 && i + 1 == nfparams)) | |
958 goto Lnomatch; | |
959 | |
960 /* Check for match with function parameter T... | |
961 */ | |
962 Type *tb = fparam->type->toBasetype(); | |
963 switch (tb->ty) | |
964 { | |
965 // Perhaps we can do better with this, see TypeFunction::callMatch() | |
966 case Tsarray: | |
967 { TypeSArray *tsa = (TypeSArray *)tb; | |
968 integer_t sz = tsa->dim->toInteger(); | |
969 if (sz != nfargs - i) | |
970 goto Lnomatch; | |
971 } | |
972 case Tarray: | |
973 { TypeArray *ta = (TypeArray *)tb; | |
974 for (; i < nfargs; i++) | |
975 { | |
976 Expression *arg = (Expression *)fargs->data[i]; | |
977 assert(arg); | |
978 MATCH m; | |
979 /* If lazy array of delegates, | |
980 * convert arg(s) to delegate(s) | |
981 */ | |
982 Type *tret = fparam->isLazyArray(); | |
983 if (tret) | |
984 { | |
985 if (ta->next->equals(arg->type)) | |
986 { m = MATCHexact; | |
987 } | |
988 else | |
989 { | |
990 m = arg->implicitConvTo(tret); | |
991 if (m == MATCHnomatch) | |
992 { | |
993 if (tret->toBasetype()->ty == Tvoid) | |
994 m = MATCHconvert; | |
995 } | |
996 } | |
997 } | |
998 else | |
999 { | |
1000 m = arg->type->deduceType(scope, ta->next, parameters, &dedtypes); | |
1001 //m = arg->implicitConvTo(ta->next); | |
1002 } | |
1003 if (m == MATCHnomatch) | |
1004 goto Lnomatch; | |
1005 if (m < match) | |
1006 match = m; | |
1007 } | |
1008 goto Lmatch; | |
1009 } | |
1010 case Tclass: | |
1011 case Tident: | |
1012 goto Lmatch; | |
1013 | |
1014 default: | |
1015 goto Lnomatch; | |
1016 } | |
1017 } | |
1018 | |
1019 Lmatch: | |
1020 | |
1021 /* Fill in any missing arguments with their defaults. | |
1022 */ | |
1023 for (i = nargsi; i < dedargs->dim; i++) | |
1024 { | |
1025 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1026 //printf("tp[%d] = %s\n", i, tp->ident->toChars()); | |
1027 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
1028 * But for function templates, we really need them to match | |
1029 */ | |
1030 Object *oarg = (Object *)dedargs->data[i]; | |
1031 Object *oded = (Object *)dedtypes.data[i]; | |
1032 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); | |
1033 if (!oarg) | |
1034 { | |
1035 if (oded) | |
1036 { | |
1037 if (tp->specialization()) | |
1038 { /* The specialization can work as long as afterwards | |
1039 * the oded == oarg | |
1040 */ | |
1041 Declaration *sparam; | |
1042 dedargs->data[i] = (void *)oded; | |
1043 MATCH m2 = tp->matchArg(paramscope, dedargs, i, parameters, &dedtypes, &sparam, 0); | |
1044 //printf("m2 = %d\n", m2); | |
1045 if (!m2) | |
1046 goto Lnomatch; | |
1047 if (m2 < match) | |
1048 match = m2; // pick worst match | |
1049 if (dedtypes.data[i] != oded) | |
1050 error("specialization not allowed for deduced parameter %s", tp->ident->toChars()); | |
1051 } | |
1052 } | |
1053 else | |
1054 { oded = tp->defaultArg(loc, paramscope); | |
1055 if (!oded) | |
1056 goto Lnomatch; | |
1057 } | |
1058 declareParameter(paramscope, tp, oded); | |
1059 dedargs->data[i] = (void *)oded; | |
1060 } | |
1061 } | |
1062 | |
1063 if (constraint) | |
1064 { /* Check to see if constraint is satisfied. | |
1065 */ | |
1066 Expression *e = constraint->syntaxCopy(); | |
1067 paramscope->flags |= SCOPEstaticif; | |
1068 e = e->semantic(paramscope); | |
1069 e = e->optimize(WANTvalue | WANTinterpret); | |
1070 if (e->isBool(TRUE)) | |
1071 ; | |
1072 else if (e->isBool(FALSE)) | |
1073 goto Lnomatch; | |
1074 else | |
1075 { | |
1076 e->error("constraint %s is not constant or does not evaluate to a bool", e->toChars()); | |
1077 } | |
1078 } | |
1079 | |
1080 | |
1081 #if 0 | |
1082 for (i = 0; i < dedargs->dim; i++) | |
1083 { Type *t = (Type *)dedargs->data[i]; | |
1084 printf("\tdedargs[%d] = %d, %s\n", i, t->dyncast(), t->toChars()); | |
1085 } | |
1086 #endif | |
1087 | |
1088 paramscope->pop(); | |
1089 //printf("\tmatch %d\n", match); | |
1090 return match; | |
1091 | |
1092 Lnomatch: | |
1093 paramscope->pop(); | |
1094 //printf("\tnomatch\n"); | |
1095 return MATCHnomatch; | |
1096 } | |
1097 | |
1098 /************************************************** | |
1099 * Declare template parameter tp with value o, and install it in the scope sc. | |
1100 */ | |
1101 | |
1102 void TemplateDeclaration::declareParameter(Scope *sc, TemplateParameter *tp, Object *o) | |
1103 { | |
1104 //printf("TemplateDeclaration::declareParameter('%s', o = %p)\n", tp->ident->toChars(), o); | |
1105 | |
1106 Type *targ = isType(o); | |
1107 Expression *ea = isExpression(o); | |
1108 Dsymbol *sa = isDsymbol(o); | |
1109 Tuple *va = isTuple(o); | |
1110 | |
1111 Dsymbol *s; | |
1112 | |
1113 if (targ) | |
1114 { | |
1115 //printf("type %s\n", targ->toChars()); | |
1116 s = new AliasDeclaration(0, tp->ident, targ); | |
1117 } | |
1118 else if (sa) | |
1119 { | |
1120 //printf("Alias %s %s;\n", sa->ident->toChars(), tp->ident->toChars()); | |
1121 s = new AliasDeclaration(0, tp->ident, sa); | |
1122 } | |
1123 else if (ea) | |
1124 { | |
1125 // tdtypes.data[i] always matches ea here | |
1126 Initializer *init = new ExpInitializer(loc, ea); | |
1127 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
1128 | |
1129 Type *t = tvp ? tvp->valType : NULL; | |
1130 | |
1131 VarDeclaration *v = new VarDeclaration(loc, t, tp->ident, init); | |
1132 v->storage_class = STCmanifest; | |
1133 s = v; | |
1134 } | |
1135 else if (va) | |
1136 { | |
1137 //printf("\ttuple\n"); | |
1138 s = new TupleDeclaration(loc, tp->ident, &va->objects); | |
1139 } | |
1140 else | |
1141 { | |
1142 #ifdef DEBUG | |
1143 o->print(); | |
1144 #endif | |
1145 assert(0); | |
1146 } | |
1147 if (!sc->insert(s)) | |
1148 error("declaration %s is already defined", tp->ident->toChars()); | |
1149 s->semantic(sc); | |
1150 } | |
1151 | |
1152 /************************************** | |
1153 * Determine if TemplateDeclaration is variadic. | |
1154 */ | |
1155 | |
1156 TemplateTupleParameter *isVariadic(TemplateParameters *parameters) | |
1157 { size_t dim = parameters->dim; | |
1158 TemplateTupleParameter *tp = NULL; | |
1159 | |
1160 if (dim) | |
1161 tp = ((TemplateParameter *)parameters->data[dim - 1])->isTemplateTupleParameter(); | |
1162 return tp; | |
1163 } | |
1164 | |
1165 TemplateTupleParameter *TemplateDeclaration::isVariadic() | |
1166 { | |
1167 return ::isVariadic(parameters); | |
1168 } | |
1169 | |
1170 /*********************************** | |
1171 * We can overload templates. | |
1172 */ | |
1173 | |
1174 int TemplateDeclaration::isOverloadable() | |
1175 { | |
1176 return 1; | |
1177 } | |
1178 | |
1179 /************************************************* | |
1180 * Given function arguments, figure out which template function | |
1181 * to expand, and return that function. | |
1182 * If no match, give error message and return NULL. | |
1183 * Input: | |
1184 * sc instantiation scope | |
1185 * loc instantiation location | |
1186 * targsi initial list of template arguments | |
1187 * ethis if !NULL, the 'this' pointer argument | |
1188 * fargs arguments to function | |
1189 * flags 1: do not issue error message on no match, just return NULL | |
1190 */ | |
1191 | |
1192 FuncDeclaration *TemplateDeclaration::deduceFunctionTemplate(Scope *sc, Loc loc, | |
1193 Objects *targsi, Expression *ethis, Expressions *fargs, int flags) | |
1194 { | |
1195 MATCH m_best = MATCHnomatch; | |
1196 TemplateDeclaration *td_ambig = NULL; | |
1197 TemplateDeclaration *td_best = NULL; | |
1198 Objects *tdargs = new Objects(); | |
1199 TemplateInstance *ti; | |
1200 FuncDeclaration *fd; | |
1201 | |
1202 #if 0 | |
1203 printf("TemplateDeclaration::deduceFunctionTemplate() %s\n", toChars()); | |
1204 printf(" targsi:\n"); | |
1205 if (targsi) | |
1206 { for (int i = 0; i < targsi->dim; i++) | |
1207 { Object *arg = (Object *)targsi->data[i]; | |
1208 printf("\t%s\n", arg->toChars()); | |
1209 } | |
1210 } | |
1211 printf(" fargs:\n"); | |
1212 for (int i = 0; i < fargs->dim; i++) | |
1213 { Expression *arg = (Expression *)fargs->data[i]; | |
1214 printf("\t%s %s\n", arg->type->toChars(), arg->toChars()); | |
1215 //printf("\tty = %d\n", arg->type->ty); | |
1216 } | |
1217 #endif | |
1218 | |
1219 for (TemplateDeclaration *td = this; td; td = td->overnext) | |
1220 { | |
1221 if (!td->scope) | |
1222 { | |
1223 error("forward reference to template %s", td->toChars()); | |
1224 goto Lerror; | |
1225 } | |
1226 if (!td->onemember || !td->onemember->toAlias()->isFuncDeclaration()) | |
1227 { | |
1228 error("is not a function template"); | |
1229 goto Lerror; | |
1230 } | |
1231 | |
1232 MATCH m; | |
1233 Objects dedargs; | |
1234 | |
1235 m = td->deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, &dedargs); | |
1236 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
1237 if (!m) // if no match | |
1238 continue; | |
1239 | |
1240 if (m < m_best) | |
1241 goto Ltd_best; | |
1242 if (m > m_best) | |
1243 goto Ltd; | |
1244 | |
1245 { | |
1246 // Disambiguate by picking the most specialized TemplateDeclaration | |
1247 MATCH c1 = td->leastAsSpecialized(td_best); | |
1248 MATCH c2 = td_best->leastAsSpecialized(td); | |
1249 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
1250 | |
1251 if (c1 > c2) | |
1252 goto Ltd; | |
1253 else if (c1 < c2) | |
1254 goto Ltd_best; | |
1255 else | |
1256 goto Lambig; | |
1257 } | |
1258 | |
1259 Lambig: // td_best and td are ambiguous | |
1260 td_ambig = td; | |
1261 continue; | |
1262 | |
1263 Ltd_best: // td_best is the best match so far | |
1264 td_ambig = NULL; | |
1265 continue; | |
1266 | |
1267 Ltd: // td is the new best match | |
1268 td_ambig = NULL; | |
1269 assert((size_t)td->scope > 0x10000); | |
1270 td_best = td; | |
1271 m_best = m; | |
1272 tdargs->setDim(dedargs.dim); | |
1273 memcpy(tdargs->data, dedargs.data, tdargs->dim * sizeof(void *)); | |
1274 continue; | |
1275 } | |
1276 if (!td_best) | |
1277 { | |
1278 if (!(flags & 1)) | |
1279 error(loc, "does not match any function template declaration"); | |
1280 goto Lerror; | |
1281 } | |
1282 if (td_ambig) | |
1283 { | |
1284 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
1285 td_best->toChars(), td_ambig->toChars()); | |
1286 } | |
1287 | |
1288 /* The best match is td_best with arguments tdargs. | |
1289 * Now instantiate the template. | |
1290 */ | |
1291 assert((size_t)td_best->scope > 0x10000); | |
1292 ti = new TemplateInstance(loc, td_best, tdargs); | |
1293 ti->semantic(sc); | |
1294 fd = ti->toAlias()->isFuncDeclaration(); | |
1295 if (!fd) | |
1296 goto Lerror; | |
1297 return fd; | |
1298 | |
1299 Lerror: | |
1300 if (!(flags & 1)) | |
1301 { | |
1302 HdrGenState hgs; | |
1303 | |
1304 OutBuffer bufa; | |
1305 Objects *args = targsi; | |
1306 if (args) | |
1307 { for (int i = 0; i < args->dim; i++) | |
1308 { | |
1309 if (i) | |
1310 bufa.writeByte(','); | |
1311 Object *oarg = (Object *)args->data[i]; | |
1312 ObjectToCBuffer(&bufa, &hgs, oarg); | |
1313 } | |
1314 } | |
1315 | |
1316 OutBuffer buf; | |
1317 argExpTypesToCBuffer(&buf, fargs, &hgs); | |
1318 | |
1319 error(loc, "cannot deduce template function from argument types !(%s)(%s)", | |
1320 bufa.toChars(), buf.toChars()); | |
1321 } | |
1322 return NULL; | |
1323 } | |
1324 | |
1325 void TemplateDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
1326 { | |
1327 #if 0 // Should handle template functions | |
1328 if (onemember && onemember->isFuncDeclaration()) | |
1329 buf->writestring("foo "); | |
1330 #endif | |
1331 buf->writestring(kind()); | |
1332 buf->writeByte(' '); | |
1333 buf->writestring(ident->toChars()); | |
1334 buf->writeByte('('); | |
1335 for (int i = 0; i < parameters->dim; i++) | |
1336 { | |
1337 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1338 if (hgs->ddoc) | |
1339 tp = (TemplateParameter *)origParameters->data[i]; | |
1340 if (i) | |
1341 buf->writeByte(','); | |
1342 tp->toCBuffer(buf, hgs); | |
1343 } | |
1344 buf->writeByte(')'); | |
1345 | |
1346 if (constraint) | |
1347 { buf->writestring(" if ("); | |
1348 constraint->toCBuffer(buf, hgs); | |
1349 buf->writeByte(')'); | |
1350 } | |
1351 | |
1352 if (hgs->hdrgen) | |
1353 { | |
1354 hgs->tpltMember++; | |
1355 buf->writenl(); | |
1356 buf->writebyte('{'); | |
1357 buf->writenl(); | |
1358 for (int i = 0; i < members->dim; i++) | |
1359 { | |
1360 Dsymbol *s = (Dsymbol *)members->data[i]; | |
1361 s->toCBuffer(buf, hgs); | |
1362 } | |
1363 buf->writebyte('}'); | |
1364 buf->writenl(); | |
1365 hgs->tpltMember--; | |
1366 } | |
1367 } | |
1368 | |
1369 | |
1370 char *TemplateDeclaration::toChars() | |
1371 { OutBuffer buf; | |
1372 HdrGenState hgs; | |
1373 | |
1374 memset(&hgs, 0, sizeof(hgs)); | |
1375 buf.writestring(ident->toChars()); | |
1376 buf.writeByte('('); | |
1377 for (int i = 0; i < parameters->dim; i++) | |
1378 { | |
1379 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1380 if (i) | |
1381 buf.writeByte(','); | |
1382 tp->toCBuffer(&buf, &hgs); | |
1383 } | |
1384 buf.writeByte(')'); | |
1385 | |
1386 if (constraint) | |
1387 { buf.writestring(" if ("); | |
1388 constraint->toCBuffer(&buf, &hgs); | |
1389 buf.writeByte(')'); | |
1390 } | |
1391 | |
1392 buf.writeByte(0); | |
1393 return (char *)buf.extractData(); | |
1394 } | |
1395 | |
1396 /* ======================== Type ============================================ */ | |
1397 | |
1398 /**** | |
1399 * Given an identifier, figure out which TemplateParameter it is. | |
1400 * Return -1 if not found. | |
1401 */ | |
1402 | |
1403 int templateIdentifierLookup(Identifier *id, TemplateParameters *parameters) | |
1404 { | |
1405 for (size_t i = 0; i < parameters->dim; i++) | |
1406 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1407 | |
1408 if (tp->ident->equals(id)) | |
1409 return i; | |
1410 } | |
1411 return -1; | |
1412 } | |
1413 | |
1414 int templateParameterLookup(Type *tparam, TemplateParameters *parameters) | |
1415 { | |
1416 assert(tparam->ty == Tident); | |
1417 TypeIdentifier *tident = (TypeIdentifier *)tparam; | |
1418 //printf("\ttident = '%s'\n", tident->toChars()); | |
1419 if (tident->idents.dim == 0) | |
1420 { | |
1421 return templateIdentifierLookup(tident->ident, parameters); | |
1422 } | |
1423 return -1; | |
1424 } | |
1425 | |
1426 /* These form the heart of template argument deduction. | |
1427 * Given 'this' being the type argument to the template instance, | |
1428 * it is matched against the template declaration parameter specialization | |
1429 * 'tparam' to determine the type to be used for the parameter. | |
1430 * Example: | |
1431 * template Foo(T:T*) // template declaration | |
1432 * Foo!(int*) // template instantiation | |
1433 * Input: | |
1434 * this = int* | |
1435 * tparam = T | |
1436 * parameters = [ T:T* ] // Array of TemplateParameter's | |
1437 * Output: | |
1438 * dedtypes = [ int ] // Array of Expression/Type's | |
1439 */ | |
1440 | |
1441 MATCH Type::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, | |
1442 Objects *dedtypes) | |
1443 { | |
1444 #if 0 | |
1445 printf("Type::deduceType()\n"); | |
1446 printf("\tthis = %d, ", ty); print(); | |
1447 printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1448 #endif | |
1449 if (!tparam) | |
1450 goto Lnomatch; | |
1451 | |
1452 if (this == tparam) | |
1453 goto Lexact; | |
1454 | |
1455 if (tparam->ty == Tident) | |
1456 { | |
1457 // Determine which parameter tparam is | |
1458 int i = templateParameterLookup(tparam, parameters); | |
1459 if (i == -1) | |
1460 { | |
1461 if (!sc) | |
1462 goto Lnomatch; | |
1463 | |
1464 /* Need a loc to go with the semantic routine. | |
1465 */ | |
1466 Loc loc; | |
1467 if (parameters->dim) | |
1468 { | |
1469 TemplateParameter *tp = (TemplateParameter *)parameters->data[0]; | |
1470 loc = tp->loc; | |
1471 } | |
1472 | |
1473 /* BUG: what if tparam is a template instance, that | |
1474 * has as an argument another Tident? | |
1475 */ | |
1476 tparam = tparam->semantic(loc, sc); | |
1477 assert(tparam->ty != Tident); | |
1478 return deduceType(sc, tparam, parameters, dedtypes); | |
1479 } | |
1480 | |
1481 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1482 | |
1483 // Found the corresponding parameter tp | |
1484 if (!tp->isTemplateTypeParameter()) | |
1485 goto Lnomatch; | |
1486 Type *tt = this; | |
1487 Type *at = (Type *)dedtypes->data[i]; | |
1488 | |
1489 // 3*3 == 9 cases | |
1490 if (tparam->isMutable()) | |
1491 { // foo(U:U) T => T | |
1492 // foo(U:U) const(T) => const(T) | |
1493 // foo(U:U) invariant(T) => invariant(T) | |
1494 if (!at) | |
1495 { dedtypes->data[i] = (void *)this; | |
1496 goto Lexact; | |
1497 } | |
1498 } | |
1499 else if (mod == tparam->mod) | |
1500 { // foo(U:const(U)) const(T) => T | |
1501 // foo(U:invariant(U)) invariant(T) => T | |
1502 tt = mutableOf(); | |
1503 if (!at) | |
1504 { dedtypes->data[i] = (void *)tt; | |
1505 goto Lexact; | |
1506 } | |
1507 } | |
1508 else if (tparam->isConst()) | |
1509 { // foo(U:const(U)) T => T | |
1510 // foo(U:const(U)) invariant(T) => T | |
1511 tt = mutableOf(); | |
1512 if (!at) | |
1513 { dedtypes->data[i] = (void *)tt; | |
1514 goto Lconst; | |
1515 } | |
1516 } | |
1517 else | |
1518 { // foo(U:invariant(U)) T => nomatch | |
1519 // foo(U:invariant(U)) const(T) => nomatch | |
1520 if (!at) | |
1521 goto Lnomatch; | |
1522 } | |
1523 | |
1524 if (tt->equals(at)) | |
1525 goto Lexact; | |
1526 else if (tt->ty == Tclass && at->ty == Tclass) | |
1527 { | |
1528 return tt->implicitConvTo(at); | |
1529 } | |
1530 else if (tt->ty == Tsarray && at->ty == Tarray && | |
1531 tt->nextOf()->implicitConvTo(at->nextOf()) >= MATCHconst) | |
1532 { | |
1533 goto Lexact; | |
1534 } | |
1535 else | |
1536 goto Lnomatch; | |
1537 } | |
1538 | |
1539 if (ty != tparam->ty) | |
1540 return implicitConvTo(tparam); | |
1541 // goto Lnomatch; | |
1542 | |
1543 if (nextOf()) | |
1544 return nextOf()->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
1545 | |
1546 Lexact: | |
1547 return MATCHexact; | |
1548 | |
1549 Lnomatch: | |
1550 return MATCHnomatch; | |
1551 | |
1552 Lconst: | |
1553 return MATCHconst; | |
1554 } | |
1555 | |
1556 MATCH TypeSArray::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, | |
1557 Objects *dedtypes) | |
1558 { | |
1559 #if 0 | |
1560 printf("TypeSArray::deduceType()\n"); | |
1561 printf("\tthis = %d, ", ty); print(); | |
1562 printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1563 #endif | |
1564 | |
1565 // Extra check that array dimensions must match | |
1566 if (tparam) | |
1567 { | |
1568 if (tparam->ty == Tsarray) | |
1569 { | |
1570 TypeSArray *tp = (TypeSArray *)tparam; | |
1571 | |
1572 if (tp->dim->op == TOKvar && | |
1573 ((VarExp *)tp->dim)->var->storage_class & STCtemplateparameter) | |
1574 { int i = templateIdentifierLookup(((VarExp *)tp->dim)->var->ident, parameters); | |
1575 // This code matches code in TypeInstance::deduceType() | |
1576 if (i == -1) | |
1577 goto Lnomatch; | |
1578 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1579 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
1580 if (!tvp) | |
1581 goto Lnomatch; | |
1582 Expression *e = (Expression *)dedtypes->data[i]; | |
1583 if (e) | |
1584 { | |
1585 if (!dim->equals(e)) | |
1586 goto Lnomatch; | |
1587 } | |
1588 else | |
1589 { Type *vt = tvp->valType->semantic(0, sc); | |
1590 MATCH m = (MATCH)dim->implicitConvTo(vt); | |
1591 if (!m) | |
1592 goto Lnomatch; | |
1593 dedtypes->data[i] = dim; | |
1594 } | |
1595 } | |
1596 else if (dim->toInteger() != tp->dim->toInteger()) | |
1597 return MATCHnomatch; | |
1598 } | |
1599 else if (tparam->ty == Taarray) | |
1600 { | |
1601 TypeAArray *tp = (TypeAArray *)tparam; | |
1602 if (tp->index->ty == Tident) | |
1603 { TypeIdentifier *tident = (TypeIdentifier *)tp->index; | |
1604 | |
1605 if (tident->idents.dim == 0) | |
1606 { Identifier *id = tident->ident; | |
1607 | |
1608 for (size_t i = 0; i < parameters->dim; i++) | |
1609 { | |
1610 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
1611 | |
1612 if (tp->ident->equals(id)) | |
1613 { // Found the corresponding template parameter | |
1614 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
1615 if (!tvp || !tvp->valType->isintegral()) | |
1616 goto Lnomatch; | |
1617 | |
1618 if (dedtypes->data[i]) | |
1619 { | |
1620 if (!dim->equals((Object *)dedtypes->data[i])) | |
1621 goto Lnomatch; | |
1622 } | |
1623 else | |
1624 { dedtypes->data[i] = (void *)dim; | |
1625 } | |
1626 return next->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
1627 } | |
1628 } | |
1629 } | |
1630 } | |
1631 } | |
1632 else if (tparam->ty == Tarray) | |
1633 { MATCH m; | |
1634 | |
1635 m = next->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
1636 if (m == MATCHexact) | |
1637 m = MATCHconvert; | |
1638 return m; | |
1639 } | |
1640 } | |
1641 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1642 | |
1643 Lnomatch: | |
1644 return MATCHnomatch; | |
1645 } | |
1646 | |
1647 MATCH TypeAArray::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1648 { | |
1649 #if 0 | |
1650 printf("TypeAArray::deduceType()\n"); | |
1651 printf("\tthis = %d, ", ty); print(); | |
1652 printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1653 #endif | |
1654 | |
1655 // Extra check that index type must match | |
1656 if (tparam && tparam->ty == Taarray) | |
1657 { | |
1658 TypeAArray *tp = (TypeAArray *)tparam; | |
1659 if (!index->deduceType(sc, tp->index, parameters, dedtypes)) | |
1660 { | |
1661 return MATCHnomatch; | |
1662 } | |
1663 } | |
1664 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1665 } | |
1666 | |
1667 MATCH TypeFunction::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1668 { | |
1669 //printf("TypeFunction::deduceType()\n"); | |
1670 //printf("\tthis = %d, ", ty); print(); | |
1671 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1672 | |
1673 // Extra check that function characteristics must match | |
1674 if (tparam && tparam->ty == Tfunction) | |
1675 { | |
1676 TypeFunction *tp = (TypeFunction *)tparam; | |
1677 if (varargs != tp->varargs || | |
1678 linkage != tp->linkage) | |
1679 return MATCHnomatch; | |
1680 | |
1681 size_t nfargs = Argument::dim(this->parameters); | |
1682 size_t nfparams = Argument::dim(tp->parameters); | |
1683 | |
1684 /* See if tuple match | |
1685 */ | |
1686 if (nfparams > 0 && nfargs >= nfparams - 1) | |
1687 { | |
1688 /* See if 'A' of the template parameter matches 'A' | |
1689 * of the type of the last function parameter. | |
1690 */ | |
1691 Argument *fparam = (Argument *)tp->parameters->data[nfparams - 1]; | |
1692 if (fparam->type->ty != Tident) | |
1693 goto L1; | |
1694 TypeIdentifier *tid = (TypeIdentifier *)fparam->type; | |
1695 if (tid->idents.dim) | |
1696 goto L1; | |
1697 | |
1698 /* Look through parameters to find tuple matching tid->ident | |
1699 */ | |
1700 size_t tupi = 0; | |
1701 for (; 1; tupi++) | |
1702 { if (tupi == parameters->dim) | |
1703 goto L1; | |
1704 TemplateParameter *t = (TemplateParameter *)parameters->data[tupi]; | |
1705 TemplateTupleParameter *tup = t->isTemplateTupleParameter(); | |
1706 if (tup && tup->ident->equals(tid->ident)) | |
1707 break; | |
1708 } | |
1709 | |
1710 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
1711 * now form the tuple argument. | |
1712 */ | |
1713 int tuple_dim = nfargs - (nfparams - 1); | |
1714 | |
1715 /* See if existing tuple, and whether it matches or not | |
1716 */ | |
1717 Object *o = (Object *)dedtypes->data[tupi]; | |
1718 if (o) | |
1719 { // Existing deduced argument must be a tuple, and must match | |
1720 Tuple *t = isTuple(o); | |
1721 if (!t || t->objects.dim != tuple_dim) | |
1722 return MATCHnomatch; | |
1723 for (size_t i = 0; i < tuple_dim; i++) | |
1724 { Argument *arg = Argument::getNth(this->parameters, nfparams - 1 + i); | |
1725 if (!arg->type->equals((Object *)t->objects.data[i])) | |
1726 return MATCHnomatch; | |
1727 } | |
1728 } | |
1729 else | |
1730 { // Create new tuple | |
1731 Tuple *t = new Tuple(); | |
1732 t->objects.setDim(tuple_dim); | |
1733 for (size_t i = 0; i < tuple_dim; i++) | |
1734 { Argument *arg = Argument::getNth(this->parameters, nfparams - 1 + i); | |
1735 t->objects.data[i] = (void *)arg->type; | |
1736 } | |
1737 dedtypes->data[tupi] = (void *)t; | |
1738 } | |
1739 nfparams--; // don't consider the last parameter for type deduction | |
1740 goto L2; | |
1741 } | |
1742 | |
1743 L1: | |
1744 if (nfargs != nfparams) | |
1745 return MATCHnomatch; | |
1746 L2: | |
1747 for (size_t i = 0; i < nfparams; i++) | |
1748 { | |
1749 Argument *a = Argument::getNth(this->parameters, i); | |
1750 Argument *ap = Argument::getNth(tp->parameters, i); | |
1751 if (a->storageClass != ap->storageClass || | |
1752 !a->type->deduceType(sc, ap->type, parameters, dedtypes)) | |
1753 return MATCHnomatch; | |
1754 } | |
1755 } | |
1756 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1757 } | |
1758 | |
1759 MATCH TypeIdentifier::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1760 { | |
1761 // Extra check | |
1762 if (tparam && tparam->ty == Tident) | |
1763 { | |
1764 TypeIdentifier *tp = (TypeIdentifier *)tparam; | |
1765 | |
1766 for (int i = 0; i < idents.dim; i++) | |
1767 { | |
1768 Identifier *id1 = (Identifier *)idents.data[i]; | |
1769 Identifier *id2 = (Identifier *)tp->idents.data[i]; | |
1770 | |
1771 if (!id1->equals(id2)) | |
1772 return MATCHnomatch; | |
1773 } | |
1774 } | |
1775 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1776 } | |
1777 | |
1778 MATCH TypeInstance::deduceType(Scope *sc, | |
1779 Type *tparam, TemplateParameters *parameters, | |
1780 Objects *dedtypes) | |
1781 { | |
1782 //printf("TypeInstance::deduceType(tparam = %s) %s\n", tparam->toChars(), toChars()); | |
1783 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1784 | |
1785 // Extra check | |
1786 if (tparam && tparam->ty == Tinstance) | |
1787 { | |
1788 TypeInstance *tp = (TypeInstance *)tparam; | |
1789 | |
1790 //printf("tempinst->tempdecl = %p\n", tempinst->tempdecl); | |
1791 //printf("tp->tempinst->tempdecl = %p\n", tp->tempinst->tempdecl); | |
1792 if (!tp->tempinst->tempdecl) | |
1793 { //printf("tp->tempinst->name = '%s'\n", tp->tempinst->name->toChars()); | |
1794 if (!tp->tempinst->name->equals(tempinst->name)) | |
1795 { | |
1796 /* Handle case of: | |
1797 * template Foo(T : sa!(T), alias sa) | |
1798 */ | |
1799 int i = templateIdentifierLookup(tp->tempinst->name, parameters); | |
1800 if (i == -1) | |
1801 { /* Didn't find it as a parameter identifier. Try looking | |
1802 * it up and seeing if is an alias. See Bugzilla 1454 | |
1803 */ | |
1804 Dsymbol *s = tempinst->tempdecl->scope->search(0, tp->tempinst->name, NULL); | |
1805 if (s) | |
1806 { | |
1807 s = s->toAlias(); | |
1808 TemplateDeclaration *td = s->isTemplateDeclaration(); | |
1809 if (td && td == tempinst->tempdecl) | |
1810 goto L2; | |
1811 } | |
1812 goto Lnomatch; | |
1813 } | |
1814 TemplateParameter *tpx = (TemplateParameter *)parameters->data[i]; | |
1815 // This logic duplicates tpx->matchArg() | |
1816 TemplateAliasParameter *ta = tpx->isTemplateAliasParameter(); | |
1817 if (!ta) | |
1818 goto Lnomatch; | |
1819 Object *sa = tempinst->tempdecl; | |
1820 if (!sa) | |
1821 goto Lnomatch; | |
1822 if (ta->specAlias && sa != ta->specAlias) | |
1823 goto Lnomatch; | |
1824 if (dedtypes->data[i]) | |
1825 { // Must match already deduced symbol | |
1826 Object *s = (Object *)dedtypes->data[i]; | |
1827 | |
1828 if (s != sa) | |
1829 goto Lnomatch; | |
1830 } | |
1831 dedtypes->data[i] = sa; | |
1832 } | |
1833 } | |
1834 else if (tempinst->tempdecl != tp->tempinst->tempdecl) | |
1835 goto Lnomatch; | |
1836 | |
1837 L2: | |
1838 if (tempinst->tiargs->dim != tp->tempinst->tiargs->dim) | |
1839 goto Lnomatch; | |
1840 | |
1841 for (int i = 0; i < tempinst->tiargs->dim; i++) | |
1842 { | |
1843 //printf("\ttest: tempinst->tiargs[%d]\n", i); | |
1844 int j; | |
1845 Object *o1 = (Object *)tempinst->tiargs->data[i]; | |
1846 Object *o2 = (Object *)tp->tempinst->tiargs->data[i]; | |
1847 | |
1848 Type *t1 = isType(o1); | |
1849 Type *t2 = isType(o2); | |
1850 | |
1851 Expression *e1 = isExpression(o1); | |
1852 Expression *e2 = isExpression(o2); | |
1853 | |
1854 #if 0 | |
1855 if (t1) printf("t1 = %s\n", t1->toChars()); | |
1856 if (t2) printf("t2 = %s\n", t2->toChars()); | |
1857 if (e1) printf("e1 = %s\n", e1->toChars()); | |
1858 if (e2) printf("e2 = %s\n", e2->toChars()); | |
1859 #endif | |
1860 | |
1861 if (t1 && t2) | |
1862 { | |
1863 if (!t1->deduceType(sc, t2, parameters, dedtypes)) | |
1864 goto Lnomatch; | |
1865 } | |
1866 else if (e1 && e2) | |
1867 { | |
1868 if (!e1->equals(e2)) | |
1869 { if (e2->op == TOKvar) | |
1870 { | |
1871 /* | |
1872 * (T:Number!(e2), int e2) | |
1873 */ | |
1874 j = templateIdentifierLookup(((VarExp *)e2)->var->ident, parameters); | |
1875 goto L1; | |
1876 } | |
1877 goto Lnomatch; | |
1878 } | |
1879 } | |
1880 else if (e1 && t2 && t2->ty == Tident) | |
1881 { | |
1882 j = templateParameterLookup(t2, parameters); | |
1883 L1: | |
1884 if (j == -1) | |
1885 goto Lnomatch; | |
1886 TemplateParameter *tp = (TemplateParameter *)parameters->data[j]; | |
1887 // BUG: use tp->matchArg() instead of the following | |
1888 TemplateValueParameter *tv = tp->isTemplateValueParameter(); | |
1889 if (!tv) | |
1890 goto Lnomatch; | |
1891 Expression *e = (Expression *)dedtypes->data[j]; | |
1892 if (e) | |
1893 { | |
1894 if (!e1->equals(e)) | |
1895 goto Lnomatch; | |
1896 } | |
1897 else | |
1898 { Type *vt = tv->valType->semantic(0, sc); | |
1899 MATCH m = (MATCH)e1->implicitConvTo(vt); | |
1900 if (!m) | |
1901 goto Lnomatch; | |
1902 dedtypes->data[j] = e1; | |
1903 } | |
1904 } | |
1905 // BUG: Need to handle alias and tuple parameters | |
1906 else | |
1907 goto Lnomatch; | |
1908 } | |
1909 } | |
1910 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1911 | |
1912 Lnomatch: | |
1913 return MATCHnomatch; | |
1914 } | |
1915 | |
1916 MATCH TypeStruct::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1917 { | |
1918 //printf("TypeStruct::deduceType()\n"); | |
1919 //printf("\tthis->parent = %s, ", sym->parent->toChars()); print(); | |
1920 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
1921 | |
1922 /* If this struct is a template struct, and we're matching | |
1923 * it against a template instance, convert the struct type | |
1924 * to a template instance, too, and try again. | |
1925 */ | |
1926 TemplateInstance *ti = sym->parent->isTemplateInstance(); | |
1927 | |
1928 if (tparam && tparam->ty == Tinstance) | |
1929 { | |
1930 if (ti && ti->toAlias() == sym) | |
1931 { | |
1932 TypeInstance *t = new TypeInstance(0, ti); | |
1933 return t->deduceType(sc, tparam, parameters, dedtypes); | |
1934 } | |
1935 | |
1936 /* Match things like: | |
1937 * S!(T).foo | |
1938 */ | |
1939 TypeInstance *tpi = (TypeInstance *)tparam; | |
1940 if (tpi->idents.dim) | |
1941 { Identifier *id = (Identifier *)tpi->idents.data[tpi->idents.dim - 1]; | |
1942 if (id->dyncast() == DYNCAST_IDENTIFIER && sym->ident->equals(id)) | |
1943 { | |
1944 Type *tparent = sym->parent->getType(); | |
1945 if (tparent) | |
1946 { | |
1947 /* Slice off the .foo in S!(T).foo | |
1948 */ | |
1949 tpi->idents.dim--; | |
1950 MATCH m = tparent->deduceType(sc, tpi, parameters, dedtypes); | |
1951 tpi->idents.dim++; | |
1952 return m; | |
1953 } | |
1954 } | |
1955 } | |
1956 } | |
1957 | |
1958 // Extra check | |
1959 if (tparam && tparam->ty == Tstruct) | |
1960 { | |
1961 TypeStruct *tp = (TypeStruct *)tparam; | |
1962 | |
1963 if (sym != tp->sym) | |
1964 return MATCHnomatch; | |
1965 } | |
1966 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1967 } | |
1968 | |
1969 MATCH TypeEnum::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1970 { | |
1971 // Extra check | |
1972 if (tparam && tparam->ty == Tenum) | |
1973 { | |
1974 TypeEnum *tp = (TypeEnum *)tparam; | |
1975 | |
1976 if (sym != tp->sym) | |
1977 return MATCHnomatch; | |
1978 } | |
1979 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1980 } | |
1981 | |
1982 MATCH TypeTypedef::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1983 { | |
1984 // Extra check | |
1985 if (tparam && tparam->ty == Ttypedef) | |
1986 { | |
1987 TypeTypedef *tp = (TypeTypedef *)tparam; | |
1988 | |
1989 if (sym != tp->sym) | |
1990 return MATCHnomatch; | |
1991 } | |
1992 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
1993 } | |
1994 | |
1995 MATCH TypeClass::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
1996 { | |
1997 //printf("TypeClass::deduceType(this = %s)\n", toChars()); | |
1998 | |
1999 /* If this class is a template class, and we're matching | |
2000 * it against a template instance, convert the class type | |
2001 * to a template instance, too, and try again. | |
2002 */ | |
2003 TemplateInstance *ti = sym->parent->isTemplateInstance(); | |
2004 | |
2005 if (tparam && tparam->ty == Tinstance) | |
2006 { | |
2007 if (ti && ti->toAlias() == sym) | |
2008 { | |
2009 TypeInstance *t = new TypeInstance(0, ti); | |
2010 return t->deduceType(sc, tparam, parameters, dedtypes); | |
2011 } | |
2012 | |
2013 /* Match things like: | |
2014 * S!(T).foo | |
2015 */ | |
2016 TypeInstance *tpi = (TypeInstance *)tparam; | |
2017 if (tpi->idents.dim) | |
2018 { Identifier *id = (Identifier *)tpi->idents.data[tpi->idents.dim - 1]; | |
2019 if (id->dyncast() == DYNCAST_IDENTIFIER && sym->ident->equals(id)) | |
2020 { | |
2021 Type *tparent = sym->parent->getType(); | |
2022 if (tparent) | |
2023 { | |
2024 /* Slice off the .foo in S!(T).foo | |
2025 */ | |
2026 tpi->idents.dim--; | |
2027 MATCH m = tparent->deduceType(sc, tpi, parameters, dedtypes); | |
2028 tpi->idents.dim++; | |
2029 return m; | |
2030 } | |
2031 } | |
2032 } | |
2033 } | |
2034 | |
2035 // Extra check | |
2036 if (tparam && tparam->ty == Tclass) | |
2037 { | |
2038 TypeClass *tp = (TypeClass *)tparam; | |
2039 | |
2040 //printf("\t%d\n", (MATCH) implicitConvTo(tp)); | |
2041 return implicitConvTo(tp); | |
2042 } | |
2043 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
2044 } | |
2045 | |
2046 /* ======================== TemplateParameter =============================== */ | |
2047 | |
2048 TemplateParameter::TemplateParameter(Loc loc, Identifier *ident) | |
2049 { | |
2050 this->loc = loc; | |
2051 this->ident = ident; | |
2052 this->sparam = NULL; | |
2053 } | |
2054 | |
2055 TemplateTypeParameter *TemplateParameter::isTemplateTypeParameter() | |
2056 { | |
2057 return NULL; | |
2058 } | |
2059 | |
2060 TemplateValueParameter *TemplateParameter::isTemplateValueParameter() | |
2061 { | |
2062 return NULL; | |
2063 } | |
2064 | |
2065 TemplateAliasParameter *TemplateParameter::isTemplateAliasParameter() | |
2066 { | |
2067 return NULL; | |
2068 } | |
2069 | |
2070 TemplateTupleParameter *TemplateParameter::isTemplateTupleParameter() | |
2071 { | |
2072 return NULL; | |
2073 } | |
2074 | |
2075 #if DMDV2 | |
2076 TemplateThisParameter *TemplateParameter::isTemplateThisParameter() | |
2077 { | |
2078 return NULL; | |
2079 } | |
2080 #endif | |
2081 | |
2082 /* ======================== TemplateTypeParameter =========================== */ | |
2083 | |
2084 // type-parameter | |
2085 | |
2086 TemplateTypeParameter::TemplateTypeParameter(Loc loc, Identifier *ident, Type *specType, | |
2087 Type *defaultType) | |
2088 : TemplateParameter(loc, ident) | |
2089 { | |
2090 this->ident = ident; | |
2091 this->specType = specType; | |
2092 this->defaultType = defaultType; | |
2093 } | |
2094 | |
2095 TemplateTypeParameter *TemplateTypeParameter::isTemplateTypeParameter() | |
2096 { | |
2097 return this; | |
2098 } | |
2099 | |
2100 TemplateParameter *TemplateTypeParameter::syntaxCopy() | |
2101 { | |
2102 TemplateTypeParameter *tp = new TemplateTypeParameter(loc, ident, specType, defaultType); | |
2103 if (tp->specType) | |
2104 tp->specType = specType->syntaxCopy(); | |
2105 if (defaultType) | |
2106 tp->defaultType = defaultType->syntaxCopy(); | |
2107 return tp; | |
2108 } | |
2109 | |
2110 void TemplateTypeParameter::declareParameter(Scope *sc) | |
2111 { | |
2112 //printf("TemplateTypeParameter::declareParameter('%s')\n", ident->toChars()); | |
2113 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
2114 sparam = new AliasDeclaration(loc, ident, ti); | |
2115 if (!sc->insert(sparam)) | |
2116 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
2117 } | |
2118 | |
2119 void TemplateTypeParameter::semantic(Scope *sc) | |
2120 { | |
2121 //printf("TemplateTypeParameter::semantic('%s')\n", ident->toChars()); | |
2122 if (specType) | |
2123 { | |
2124 specType = specType->semantic(loc, sc); | |
2125 } | |
2126 #if 0 // Don't do semantic() until instantiation | |
2127 if (defaultType) | |
2128 { | |
2129 defaultType = defaultType->semantic(loc, sc); | |
2130 } | |
2131 #endif | |
2132 } | |
2133 | |
2134 /**************************************** | |
2135 * Determine if two TemplateParameters are the same | |
2136 * as far as TemplateDeclaration overloading goes. | |
2137 * Returns: | |
2138 * 1 match | |
2139 * 0 no match | |
2140 */ | |
2141 | |
2142 int TemplateTypeParameter::overloadMatch(TemplateParameter *tp) | |
2143 { | |
2144 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
2145 | |
2146 if (ttp) | |
2147 { | |
2148 if (specType != ttp->specType) | |
2149 goto Lnomatch; | |
2150 | |
2151 if (specType && !specType->equals(ttp->specType)) | |
2152 goto Lnomatch; | |
2153 | |
2154 return 1; // match | |
2155 } | |
2156 | |
2157 Lnomatch: | |
2158 return 0; | |
2159 } | |
2160 | |
2161 /******************************************* | |
2162 * Match to a particular TemplateParameter. | |
2163 * Input: | |
2164 * i i'th argument | |
2165 * tiargs[] actual arguments to template instance | |
2166 * parameters[] template parameters | |
2167 * dedtypes[] deduced arguments to template instance | |
2168 * *psparam set to symbol declared and initialized to dedtypes[i] | |
2169 * flags 1: don't do 'toHeadMutable()' | |
2170 */ | |
2171 | |
2172 MATCH TemplateTypeParameter::matchArg(Scope *sc, Objects *tiargs, | |
2173 int i, TemplateParameters *parameters, Objects *dedtypes, | |
2174 Declaration **psparam, int flags) | |
2175 { | |
2176 //printf("TemplateTypeParameter::matchArg()\n"); | |
2177 Type *t; | |
2178 Object *oarg; | |
2179 MATCH m = MATCHexact; | |
2180 Type *ta; | |
2181 | |
2182 if (i < tiargs->dim) | |
2183 oarg = (Object *)tiargs->data[i]; | |
2184 else | |
2185 { // Get default argument instead | |
2186 oarg = defaultArg(loc, sc); | |
2187 if (!oarg) | |
2188 { assert(i < dedtypes->dim); | |
2189 // It might have already been deduced | |
2190 oarg = (Object *)dedtypes->data[i]; | |
2191 if (!oarg) | |
2192 { | |
2193 goto Lnomatch; | |
2194 } | |
2195 flags |= 1; // already deduced, so don't to toHeadMutable() | |
2196 } | |
2197 } | |
2198 | |
2199 ta = isType(oarg); | |
2200 if (!ta) | |
2201 { | |
2202 //printf("%s %p %p %p\n", oarg->toChars(), isExpression(oarg), isDsymbol(oarg), isTuple(oarg)); | |
2203 goto Lnomatch; | |
2204 } | |
2205 //printf("ta is %s\n", ta->toChars()); | |
2206 | |
2207 t = (Type *)dedtypes->data[i]; | |
2208 | |
2209 if (specType) | |
2210 { | |
2211 //printf("\tcalling deduceType(): ta is %s, specType is %s\n", ta->toChars(), specType->toChars()); | |
2212 MATCH m2 = ta->deduceType(sc, specType, parameters, dedtypes); | |
2213 if (m2 == MATCHnomatch) | |
2214 { //printf("\tfailed deduceType\n"); | |
2215 goto Lnomatch; | |
2216 } | |
2217 | |
2218 if (m2 < m) | |
2219 m = m2; | |
2220 t = (Type *)dedtypes->data[i]; | |
2221 } | |
2222 else | |
2223 { | |
2224 // So that matches with specializations are better | |
2225 m = MATCHconvert; | |
2226 | |
2227 /* This is so that: | |
2228 * template Foo(T), Foo!(const int), => ta == int | |
2229 */ | |
2230 // if (!(flags & 1)) | |
2231 // ta = ta->toHeadMutable(); | |
2232 | |
2233 if (t) | |
2234 { // Must match already deduced type | |
2235 | |
2236 m = MATCHexact; | |
2237 if (!t->equals(ta)) | |
2238 { //printf("t = %s ta = %s\n", t->toChars(), ta->toChars()); | |
2239 goto Lnomatch; | |
2240 } | |
2241 } | |
2242 } | |
2243 | |
2244 if (!t) | |
2245 { | |
2246 dedtypes->data[i] = ta; | |
2247 t = ta; | |
2248 } | |
2249 *psparam = new AliasDeclaration(loc, ident, t); | |
2250 //printf("\tm = %d\n", m); | |
2251 return m; | |
2252 | |
2253 Lnomatch: | |
2254 *psparam = NULL; | |
2255 //printf("\tm = %d\n", MATCHnomatch); | |
2256 return MATCHnomatch; | |
2257 } | |
2258 | |
2259 | |
2260 void TemplateTypeParameter::print(Object *oarg, Object *oded) | |
2261 { | |
2262 printf(" %s\n", ident->toChars()); | |
2263 | |
2264 Type *t = isType(oarg); | |
2265 Type *ta = isType(oded); | |
2266 | |
2267 assert(ta); | |
2268 | |
2269 if (specType) | |
2270 printf("\tSpecialization: %s\n", specType->toChars()); | |
2271 if (defaultType) | |
2272 printf("\tDefault: %s\n", defaultType->toChars()); | |
2273 printf("\tArgument: %s\n", t ? t->toChars() : "NULL"); | |
2274 printf("\tDeduced Type: %s\n", ta->toChars()); | |
2275 } | |
2276 | |
2277 | |
2278 void TemplateTypeParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2279 { | |
2280 buf->writestring(ident->toChars()); | |
2281 if (specType) | |
2282 { | |
2283 buf->writestring(" : "); | |
2284 specType->toCBuffer(buf, NULL, hgs); | |
2285 } | |
2286 if (defaultType) | |
2287 { | |
2288 buf->writestring(" = "); | |
2289 defaultType->toCBuffer(buf, NULL, hgs); | |
2290 } | |
2291 } | |
2292 | |
2293 | |
2294 void *TemplateTypeParameter::dummyArg() | |
2295 { Type *t; | |
2296 | |
2297 if (specType) | |
2298 t = specType; | |
2299 else | |
2300 { // Use this for alias-parameter's too (?) | |
2301 t = new TypeIdentifier(loc, ident); | |
2302 } | |
2303 return (void *)t; | |
2304 } | |
2305 | |
2306 | |
2307 Object *TemplateTypeParameter::specialization() | |
2308 { | |
2309 return specType; | |
2310 } | |
2311 | |
2312 | |
2313 Object *TemplateTypeParameter::defaultArg(Loc loc, Scope *sc) | |
2314 { | |
2315 Type *t; | |
2316 | |
2317 t = defaultType; | |
2318 if (t) | |
2319 { | |
2320 t = t->syntaxCopy(); | |
2321 t = t->semantic(loc, sc); | |
2322 } | |
2323 return t; | |
2324 } | |
2325 | |
2326 /* ======================== TemplateThisParameter =========================== */ | |
2327 | |
2328 #if DMDV2 | |
2329 // this-parameter | |
2330 | |
2331 TemplateThisParameter::TemplateThisParameter(Loc loc, Identifier *ident, | |
2332 Type *specType, | |
2333 Type *defaultType) | |
2334 : TemplateTypeParameter(loc, ident, specType, defaultType) | |
2335 { | |
2336 } | |
2337 | |
2338 TemplateThisParameter *TemplateThisParameter::isTemplateThisParameter() | |
2339 { | |
2340 return this; | |
2341 } | |
2342 | |
2343 TemplateParameter *TemplateThisParameter::syntaxCopy() | |
2344 { | |
2345 TemplateThisParameter *tp = new TemplateThisParameter(loc, ident, specType, defaultType); | |
2346 if (tp->specType) | |
2347 tp->specType = specType->syntaxCopy(); | |
2348 if (defaultType) | |
2349 tp->defaultType = defaultType->syntaxCopy(); | |
2350 return tp; | |
2351 } | |
2352 | |
2353 void TemplateThisParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2354 { | |
2355 buf->writestring("this "); | |
2356 TemplateTypeParameter::toCBuffer(buf, hgs); | |
2357 } | |
2358 #endif | |
2359 | |
2360 /* ======================== TemplateAliasParameter ========================== */ | |
2361 | |
2362 // alias-parameter | |
2363 | |
2364 Dsymbol *TemplateAliasParameter::sdummy = NULL; | |
2365 | |
2366 TemplateAliasParameter::TemplateAliasParameter(Loc loc, Identifier *ident, | |
2367 Type *specType, Object *specAlias, Object *defaultAlias) | |
2368 : TemplateParameter(loc, ident) | |
2369 { | |
2370 this->ident = ident; | |
2371 this->specType = specType; | |
2372 this->specAlias = specAlias; | |
2373 this->defaultAlias = defaultAlias; | |
2374 } | |
2375 | |
2376 TemplateAliasParameter *TemplateAliasParameter::isTemplateAliasParameter() | |
2377 { | |
2378 return this; | |
2379 } | |
2380 | |
2381 TemplateParameter *TemplateAliasParameter::syntaxCopy() | |
2382 { | |
2383 TemplateAliasParameter *tp = new TemplateAliasParameter(loc, ident, specType, specAlias, defaultAlias); | |
2384 if (tp->specType) | |
2385 tp->specType = specType->syntaxCopy(); | |
2386 tp->specAlias = objectSyntaxCopy(specAlias); | |
2387 tp->defaultAlias = objectSyntaxCopy(defaultAlias); | |
2388 return tp; | |
2389 } | |
2390 | |
2391 void TemplateAliasParameter::declareParameter(Scope *sc) | |
2392 { | |
2393 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
2394 sparam = new AliasDeclaration(loc, ident, ti); | |
2395 if (!sc->insert(sparam)) | |
2396 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
2397 } | |
2398 | |
2399 Object *aliasParameterSemantic(Loc loc, Scope *sc, Object *o) | |
2400 { | |
2401 if (o) | |
2402 { | |
2403 Expression *ea = isExpression(o); | |
2404 Type *ta = isType(o); | |
2405 if (ta) | |
2406 { Dsymbol *s = ta->toDsymbol(sc); | |
2407 if (s) | |
2408 o = s; | |
2409 else | |
2410 o = ta->semantic(loc, sc); | |
2411 } | |
2412 else if (ea) | |
2413 { | |
2414 ea = ea->semantic(sc); | |
2415 o = ea->optimize(WANTvalue | WANTinterpret); | |
2416 } | |
2417 } | |
2418 return o; | |
2419 } | |
2420 | |
2421 void TemplateAliasParameter::semantic(Scope *sc) | |
2422 { | |
2423 if (specType) | |
2424 { | |
2425 specType = specType->semantic(loc, sc); | |
2426 } | |
2427 specAlias = aliasParameterSemantic(loc, sc, specAlias); | |
2428 #if 0 // Don't do semantic() until instantiation | |
2429 if (defaultAlias) | |
2430 defaultAlias = defaultAlias->semantic(loc, sc); | |
2431 #endif | |
2432 } | |
2433 | |
2434 int TemplateAliasParameter::overloadMatch(TemplateParameter *tp) | |
2435 { | |
2436 TemplateAliasParameter *tap = tp->isTemplateAliasParameter(); | |
2437 | |
2438 if (tap) | |
2439 { | |
2440 if (specAlias != tap->specAlias) | |
2441 goto Lnomatch; | |
2442 | |
2443 return 1; // match | |
2444 } | |
2445 | |
2446 Lnomatch: | |
2447 return 0; | |
2448 } | |
2449 | |
2450 MATCH TemplateAliasParameter::matchArg(Scope *sc, | |
2451 Objects *tiargs, int i, TemplateParameters *parameters, | |
2452 Objects *dedtypes, | |
2453 Declaration **psparam, int flags) | |
2454 { | |
2455 Object *sa; | |
2456 Object *oarg; | |
2457 Expression *ea; | |
2458 Dsymbol *s; | |
2459 | |
2460 //printf("TemplateAliasParameter::matchArg()\n"); | |
2461 | |
2462 if (i < tiargs->dim) | |
2463 oarg = (Object *)tiargs->data[i]; | |
2464 else | |
2465 { // Get default argument instead | |
2466 oarg = defaultArg(loc, sc); | |
2467 if (!oarg) | |
2468 { assert(i < dedtypes->dim); | |
2469 // It might have already been deduced | |
2470 oarg = (Object *)dedtypes->data[i]; | |
2471 if (!oarg) | |
2472 goto Lnomatch; | |
2473 } | |
2474 } | |
2475 | |
2476 sa = getDsymbol(oarg); | |
2477 if (sa) | |
2478 { | |
2479 /* specType means the alias must be a declaration with a type | |
2480 * that matches specType. | |
2481 */ | |
2482 if (specType) | |
2483 { Declaration *d = ((Dsymbol *)sa)->isDeclaration(); | |
2484 if (!d) | |
2485 goto Lnomatch; | |
2486 if (!d->type->equals(specType)) | |
2487 goto Lnomatch; | |
2488 } | |
2489 } | |
2490 else | |
2491 { | |
2492 sa = oarg; | |
2493 ea = isExpression(oarg); | |
2494 if (ea) | |
2495 { if (specType) | |
2496 { | |
2497 if (!ea->type->equals(specType)) | |
2498 goto Lnomatch; | |
2499 } | |
2500 } | |
2501 else | |
2502 goto Lnomatch; | |
2503 } | |
2504 | |
2505 if (specAlias) | |
2506 { | |
2507 if (sa == sdummy) | |
2508 goto Lnomatch; | |
2509 if (sa != specAlias) | |
2510 goto Lnomatch; | |
2511 } | |
2512 else if (dedtypes->data[i]) | |
2513 { // Must match already deduced symbol | |
2514 Object *s = (Object *)dedtypes->data[i]; | |
2515 | |
2516 if (!sa || s != sa) | |
2517 goto Lnomatch; | |
2518 } | |
2519 dedtypes->data[i] = sa; | |
2520 | |
2521 s = isDsymbol(sa); | |
2522 if (s) | |
2523 *psparam = new AliasDeclaration(loc, ident, s); | |
2524 else | |
2525 { | |
2526 assert(ea); | |
2527 | |
2528 // Declare manifest constant | |
2529 Initializer *init = new ExpInitializer(loc, ea); | |
2530 VarDeclaration *v = new VarDeclaration(loc, NULL, ident, init); | |
2531 v->storage_class = STCmanifest; | |
2532 v->semantic(sc); | |
2533 *psparam = v; | |
2534 } | |
2535 return MATCHexact; | |
2536 | |
2537 Lnomatch: | |
2538 *psparam = NULL; | |
2539 return MATCHnomatch; | |
2540 } | |
2541 | |
2542 | |
2543 void TemplateAliasParameter::print(Object *oarg, Object *oded) | |
2544 { | |
2545 printf(" %s\n", ident->toChars()); | |
2546 | |
2547 Dsymbol *sa = isDsymbol(oded); | |
2548 assert(sa); | |
2549 | |
2550 printf("\tArgument alias: %s\n", sa->toChars()); | |
2551 } | |
2552 | |
2553 void TemplateAliasParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2554 { | |
2555 buf->writestring("alias "); | |
2556 if (specType) | |
2557 { HdrGenState hgs; | |
2558 specType->toCBuffer(buf, ident, &hgs); | |
2559 } | |
2560 else | |
2561 buf->writestring(ident->toChars()); | |
2562 if (specAlias) | |
2563 { | |
2564 buf->writestring(" : "); | |
2565 ObjectToCBuffer(buf, hgs, specAlias); | |
2566 } | |
2567 if (defaultAlias) | |
2568 { | |
2569 buf->writestring(" = "); | |
2570 ObjectToCBuffer(buf, hgs, defaultAlias); | |
2571 } | |
2572 } | |
2573 | |
2574 | |
2575 void *TemplateAliasParameter::dummyArg() | |
2576 { Object *s; | |
2577 | |
2578 s = specAlias; | |
2579 if (!s) | |
2580 { | |
2581 if (!sdummy) | |
2582 sdummy = new Dsymbol(); | |
2583 s = sdummy; | |
2584 } | |
2585 return (void*)s; | |
2586 } | |
2587 | |
2588 | |
2589 Object *TemplateAliasParameter::specialization() | |
2590 { | |
2591 return specAlias; | |
2592 } | |
2593 | |
2594 | |
2595 Object *TemplateAliasParameter::defaultArg(Loc loc, Scope *sc) | |
2596 { | |
2597 Object *o = aliasParameterSemantic(loc, sc, defaultAlias); | |
2598 return o; | |
2599 } | |
2600 | |
2601 /* ======================== TemplateValueParameter ========================== */ | |
2602 | |
2603 // value-parameter | |
2604 | |
2605 Expression *TemplateValueParameter::edummy = NULL; | |
2606 | |
2607 TemplateValueParameter::TemplateValueParameter(Loc loc, Identifier *ident, Type *valType, | |
2608 Expression *specValue, Expression *defaultValue) | |
2609 : TemplateParameter(loc, ident) | |
2610 { | |
2611 this->ident = ident; | |
2612 this->valType = valType; | |
2613 this->specValue = specValue; | |
2614 this->defaultValue = defaultValue; | |
2615 } | |
2616 | |
2617 TemplateValueParameter *TemplateValueParameter::isTemplateValueParameter() | |
2618 { | |
2619 return this; | |
2620 } | |
2621 | |
2622 TemplateParameter *TemplateValueParameter::syntaxCopy() | |
2623 { | |
2624 TemplateValueParameter *tp = | |
2625 new TemplateValueParameter(loc, ident, valType, specValue, defaultValue); | |
2626 tp->valType = valType->syntaxCopy(); | |
2627 if (specValue) | |
2628 tp->specValue = specValue->syntaxCopy(); | |
2629 if (defaultValue) | |
2630 tp->defaultValue = defaultValue->syntaxCopy(); | |
2631 return tp; | |
2632 } | |
2633 | |
2634 void TemplateValueParameter::declareParameter(Scope *sc) | |
2635 { | |
2636 VarDeclaration *v = new VarDeclaration(loc, valType, ident, NULL); | |
2637 v->storage_class = STCtemplateparameter; | |
2638 if (!sc->insert(v)) | |
2639 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
2640 sparam = v; | |
2641 } | |
2642 | |
2643 void TemplateValueParameter::semantic(Scope *sc) | |
2644 { | |
2645 sparam->semantic(sc); | |
2646 valType = valType->semantic(loc, sc); | |
2647 if (!(valType->isintegral() || valType->isfloating() || valType->isString()) && | |
2648 valType->ty != Tident) | |
2649 error(loc, "arithmetic/string type expected for value-parameter, not %s", valType->toChars()); | |
2650 | |
2651 if (specValue) | |
2652 { Expression *e = specValue; | |
2653 | |
2654 e = e->semantic(sc); | |
2655 e = e->implicitCastTo(sc, valType); | |
2656 e = e->optimize(WANTvalue | WANTinterpret); | |
2657 if (e->op == TOKint64 || e->op == TOKfloat64 || | |
2658 e->op == TOKcomplex80 || e->op == TOKnull || e->op == TOKstring) | |
2659 specValue = e; | |
2660 //e->toInteger(); | |
2661 } | |
2662 | |
2663 #if 0 // defer semantic analysis to arg match | |
2664 if (defaultValue) | |
2665 { Expression *e = defaultValue; | |
2666 | |
2667 e = e->semantic(sc); | |
2668 e = e->implicitCastTo(sc, valType); | |
2669 e = e->optimize(WANTvalue | WANTinterpret); | |
2670 if (e->op == TOKint64) | |
2671 defaultValue = e; | |
2672 //e->toInteger(); | |
2673 } | |
2674 #endif | |
2675 } | |
2676 | |
2677 int TemplateValueParameter::overloadMatch(TemplateParameter *tp) | |
2678 { | |
2679 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
2680 | |
2681 if (tvp) | |
2682 { | |
2683 if (valType != tvp->valType) | |
2684 goto Lnomatch; | |
2685 | |
2686 if (valType && !valType->equals(tvp->valType)) | |
2687 goto Lnomatch; | |
2688 | |
2689 if (specValue != tvp->specValue) | |
2690 goto Lnomatch; | |
2691 | |
2692 return 1; // match | |
2693 } | |
2694 | |
2695 Lnomatch: | |
2696 return 0; | |
2697 } | |
2698 | |
2699 | |
2700 MATCH TemplateValueParameter::matchArg(Scope *sc, | |
2701 Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, | |
2702 Declaration **psparam, int flags) | |
2703 { | |
2704 //printf("TemplateValueParameter::matchArg()\n"); | |
2705 | |
2706 Initializer *init; | |
2707 Declaration *sparam; | |
2708 MATCH m = MATCHexact; | |
2709 Expression *ei; | |
2710 Object *oarg; | |
2711 | |
2712 if (i < tiargs->dim) | |
2713 oarg = (Object *)tiargs->data[i]; | |
2714 else | |
2715 { // Get default argument instead | |
2716 oarg = defaultArg(loc, sc); | |
2717 if (!oarg) | |
2718 { assert(i < dedtypes->dim); | |
2719 // It might have already been deduced | |
2720 oarg = (Object *)dedtypes->data[i]; | |
2721 if (!oarg) | |
2722 goto Lnomatch; | |
2723 } | |
2724 } | |
2725 | |
2726 ei = isExpression(oarg); | |
2727 Type *vt; | |
2728 | |
2729 if (!ei && oarg) | |
2730 goto Lnomatch; | |
2731 | |
2732 if (ei && ei->op == TOKvar) | |
2733 { // Resolve const variables that we had skipped earlier | |
2734 ei = ei->optimize(WANTvalue | WANTinterpret); | |
2735 } | |
2736 | |
2737 if (specValue) | |
2738 { | |
2739 if (!ei || ei == edummy) | |
2740 goto Lnomatch; | |
2741 | |
2742 Expression *e = specValue; | |
2743 | |
2744 e = e->semantic(sc); | |
2745 e = e->implicitCastTo(sc, valType); | |
2746 e = e->optimize(WANTvalue | WANTinterpret); | |
2747 //e->type = e->type->toHeadMutable(); | |
2748 | |
2749 ei = ei->syntaxCopy(); | |
2750 ei = ei->semantic(sc); | |
2751 ei = ei->optimize(WANTvalue | WANTinterpret); | |
2752 //ei->type = ei->type->toHeadMutable(); | |
2753 //printf("\tei: %s, %s\n", ei->toChars(), ei->type->toChars()); | |
2754 //printf("\te : %s, %s\n", e->toChars(), e->type->toChars()); | |
2755 if (!ei->equals(e)) | |
2756 goto Lnomatch; | |
2757 } | |
2758 else if (dedtypes->data[i]) | |
2759 { // Must match already deduced value | |
2760 Expression *e = (Expression *)dedtypes->data[i]; | |
2761 | |
2762 if (!ei || !ei->equals(e)) | |
2763 goto Lnomatch; | |
2764 } | |
2765 Lmatch: | |
2766 //printf("\tvalType: %s, ty = %d\n", valType->toChars(), valType->ty); | |
2767 vt = valType->semantic(0, sc); | |
2768 //printf("ei: %s, ei->type: %s\n", ei->toChars(), ei->type->toChars()); | |
2769 //printf("vt = %s\n", vt->toChars()); | |
2770 if (ei->type) | |
2771 { | |
2772 //ei->type = ei->type->toHeadMutable(); | |
2773 m = (MATCH)ei->implicitConvTo(vt); | |
2774 //printf("m: %d\n", m); | |
2775 if (!m) | |
2776 goto Lnomatch; | |
2777 } | |
2778 dedtypes->data[i] = ei; | |
2779 | |
2780 init = new ExpInitializer(loc, ei); | |
2781 sparam = new VarDeclaration(loc, vt, ident, init); | |
2782 sparam->storage_class = STCmanifest; | |
2783 *psparam = sparam; | |
2784 return m; | |
2785 | |
2786 Lnomatch: | |
2787 //printf("\tno match\n"); | |
2788 *psparam = NULL; | |
2789 return MATCHnomatch; | |
2790 } | |
2791 | |
2792 | |
2793 void TemplateValueParameter::print(Object *oarg, Object *oded) | |
2794 { | |
2795 printf(" %s\n", ident->toChars()); | |
2796 | |
2797 Expression *ea = isExpression(oded); | |
2798 | |
2799 if (specValue) | |
2800 printf("\tSpecialization: %s\n", specValue->toChars()); | |
2801 printf("\tArgument Value: %s\n", ea ? ea->toChars() : "NULL"); | |
2802 } | |
2803 | |
2804 | |
2805 void TemplateValueParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2806 { | |
2807 valType->toCBuffer(buf, ident, hgs); | |
2808 if (specValue) | |
2809 { | |
2810 buf->writestring(" : "); | |
2811 specValue->toCBuffer(buf, hgs); | |
2812 } | |
2813 if (defaultValue) | |
2814 { | |
2815 buf->writestring(" = "); | |
2816 defaultValue->toCBuffer(buf, hgs); | |
2817 } | |
2818 } | |
2819 | |
2820 | |
2821 void *TemplateValueParameter::dummyArg() | |
2822 { Expression *e; | |
2823 | |
2824 e = specValue; | |
2825 if (!e) | |
2826 { | |
2827 // Create a dummy value | |
2828 if (!edummy) | |
2829 edummy = valType->defaultInit(); | |
2830 e = edummy; | |
2831 } | |
2832 return (void *)e; | |
2833 } | |
2834 | |
2835 | |
2836 Object *TemplateValueParameter::specialization() | |
2837 { | |
2838 return specValue; | |
2839 } | |
2840 | |
2841 | |
2842 Object *TemplateValueParameter::defaultArg(Loc loc, Scope *sc) | |
2843 { | |
2844 Expression *e = defaultValue; | |
2845 if (e) | |
2846 { | |
2847 e = e->syntaxCopy(); | |
2848 e = e->semantic(sc); | |
2849 #if DMDV2 | |
2850 if (e->op == TOKdefault) | |
2851 { DefaultInitExp *de = (DefaultInitExp *)e; | |
2852 e = de->resolve(loc, sc); | |
2853 } | |
2854 #endif | |
2855 } | |
2856 return e; | |
2857 } | |
2858 | |
2859 /* ======================== TemplateTupleParameter ========================== */ | |
2860 | |
2861 // variadic-parameter | |
2862 | |
2863 TemplateTupleParameter::TemplateTupleParameter(Loc loc, Identifier *ident) | |
2864 : TemplateParameter(loc, ident) | |
2865 { | |
2866 this->ident = ident; | |
2867 } | |
2868 | |
2869 TemplateTupleParameter *TemplateTupleParameter::isTemplateTupleParameter() | |
2870 { | |
2871 return this; | |
2872 } | |
2873 | |
2874 TemplateParameter *TemplateTupleParameter::syntaxCopy() | |
2875 { | |
2876 TemplateTupleParameter *tp = new TemplateTupleParameter(loc, ident); | |
2877 return tp; | |
2878 } | |
2879 | |
2880 void TemplateTupleParameter::declareParameter(Scope *sc) | |
2881 { | |
2882 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
2883 sparam = new AliasDeclaration(loc, ident, ti); | |
2884 if (!sc->insert(sparam)) | |
2885 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
2886 } | |
2887 | |
2888 void TemplateTupleParameter::semantic(Scope *sc) | |
2889 { | |
2890 } | |
2891 | |
2892 int TemplateTupleParameter::overloadMatch(TemplateParameter *tp) | |
2893 { | |
2894 TemplateTupleParameter *tvp = tp->isTemplateTupleParameter(); | |
2895 | |
2896 if (tvp) | |
2897 { | |
2898 return 1; // match | |
2899 } | |
2900 | |
2901 Lnomatch: | |
2902 return 0; | |
2903 } | |
2904 | |
2905 MATCH TemplateTupleParameter::matchArg(Scope *sc, | |
2906 Objects *tiargs, int i, TemplateParameters *parameters, | |
2907 Objects *dedtypes, | |
2908 Declaration **psparam, int flags) | |
2909 { | |
2910 //printf("TemplateTupleParameter::matchArg()\n"); | |
2911 | |
2912 /* The rest of the actual arguments (tiargs[]) form the match | |
2913 * for the variadic parameter. | |
2914 */ | |
2915 assert(i + 1 == dedtypes->dim); // must be the last one | |
2916 Tuple *ovar; | |
2917 if (i + 1 == tiargs->dim && isTuple((Object *)tiargs->data[i])) | |
2918 ovar = isTuple((Object *)tiargs->data[i]); | |
2919 else | |
2920 { | |
2921 ovar = new Tuple(); | |
2922 //printf("ovar = %p\n", ovar); | |
2923 if (i < tiargs->dim) | |
2924 { | |
2925 //printf("i = %d, tiargs->dim = %d\n", i, tiargs->dim); | |
2926 ovar->objects.setDim(tiargs->dim - i); | |
2927 for (size_t j = 0; j < ovar->objects.dim; j++) | |
2928 ovar->objects.data[j] = tiargs->data[i + j]; | |
2929 } | |
2930 } | |
2931 *psparam = new TupleDeclaration(loc, ident, &ovar->objects); | |
2932 dedtypes->data[i] = (void *)ovar; | |
2933 return MATCHexact; | |
2934 } | |
2935 | |
2936 | |
2937 void TemplateTupleParameter::print(Object *oarg, Object *oded) | |
2938 { | |
2939 printf(" %s... [", ident->toChars()); | |
2940 Tuple *v = isTuple(oded); | |
2941 assert(v); | |
2942 | |
2943 //printf("|%d| ", v->objects.dim); | |
2944 for (int i = 0; i < v->objects.dim; i++) | |
2945 { | |
2946 if (i) | |
2947 printf(", "); | |
2948 | |
2949 Object *o = (Object *)v->objects.data[i]; | |
2950 | |
2951 Dsymbol *sa = isDsymbol(o); | |
2952 if (sa) | |
2953 printf("alias: %s", sa->toChars()); | |
2954 | |
2955 Type *ta = isType(o); | |
2956 if (ta) | |
2957 printf("type: %s", ta->toChars()); | |
2958 | |
2959 Expression *ea = isExpression(o); | |
2960 if (ea) | |
2961 printf("exp: %s", ea->toChars()); | |
2962 | |
2963 assert(!isTuple(o)); // no nested Tuple arguments | |
2964 } | |
2965 | |
2966 printf("]\n"); | |
2967 } | |
2968 | |
2969 void TemplateTupleParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2970 { | |
2971 buf->writestring(ident->toChars()); | |
2972 buf->writestring("..."); | |
2973 } | |
2974 | |
2975 | |
2976 void *TemplateTupleParameter::dummyArg() | |
2977 { | |
2978 return NULL; | |
2979 } | |
2980 | |
2981 | |
2982 Object *TemplateTupleParameter::specialization() | |
2983 { | |
2984 return NULL; | |
2985 } | |
2986 | |
2987 | |
2988 Object *TemplateTupleParameter::defaultArg(Loc loc, Scope *sc) | |
2989 { | |
2990 return NULL; | |
2991 } | |
2992 | |
2993 /* ======================== TemplateInstance ================================ */ | |
2994 | |
2995 TemplateInstance::TemplateInstance(Loc loc, Identifier *ident) | |
2996 : ScopeDsymbol(NULL) | |
2997 { | |
2998 #if LOG | |
2999 printf("TemplateInstance(this = %p, ident = '%s')\n", this, ident ? ident->toChars() : "null"); | |
3000 #endif | |
3001 this->loc = loc; | |
3002 this->name = ident; | |
3003 this->tiargs = NULL; | |
3004 this->tempdecl = NULL; | |
3005 this->inst = NULL; | |
3006 this->argsym = NULL; | |
3007 this->aliasdecl = NULL; | |
3008 this->semanticdone = 0; | |
3009 this->semantictiargsdone = 0; | |
3010 this->withsym = NULL; | |
3011 this->nest = 0; | |
3012 this->havetempdecl = 0; | |
3013 this->isnested = NULL; | |
3014 this->errors = 0; | |
3015 this->tinst = NULL; | |
3016 } | |
3017 | |
3018 /***************** | |
3019 * This constructor is only called when we figured out which function | |
3020 * template to instantiate. | |
3021 */ | |
3022 | |
3023 TemplateInstance::TemplateInstance(Loc loc, TemplateDeclaration *td, Objects *tiargs) | |
3024 : ScopeDsymbol(NULL) | |
3025 { | |
3026 #if LOG | |
3027 printf("TemplateInstance(this = %p, tempdecl = '%s')\n", this, td->toChars()); | |
3028 #endif | |
3029 this->loc = loc; | |
3030 this->name = td->ident; | |
3031 this->tiargs = tiargs; | |
3032 this->tempdecl = td; | |
3033 this->inst = NULL; | |
3034 this->argsym = NULL; | |
3035 this->aliasdecl = NULL; | |
3036 this->semanticdone = 0; | |
3037 this->semantictiargsdone = 1; | |
3038 this->withsym = NULL; | |
3039 this->nest = 0; | |
3040 this->havetempdecl = 1; | |
3041 this->isnested = NULL; | |
3042 this->errors = 0; | |
3043 this->tinst = NULL; | |
3044 | |
3045 assert((size_t)tempdecl->scope > 0x10000); | |
3046 } | |
3047 | |
3048 | |
3049 Objects *TemplateInstance::arraySyntaxCopy(Objects *objs) | |
3050 { | |
3051 Objects *a = NULL; | |
3052 if (objs) | |
3053 { a = new Objects(); | |
3054 a->setDim(objs->dim); | |
3055 for (size_t i = 0; i < objs->dim; i++) | |
3056 { | |
3057 a->data[i] = objectSyntaxCopy((Object *)objs->data[i]); | |
3058 } | |
3059 } | |
3060 return a; | |
3061 } | |
3062 | |
3063 Dsymbol *TemplateInstance::syntaxCopy(Dsymbol *s) | |
3064 { | |
3065 TemplateInstance *ti; | |
3066 | |
3067 if (s) | |
3068 ti = (TemplateInstance *)s; | |
3069 else | |
3070 ti = new TemplateInstance(loc, name); | |
3071 | |
3072 ti->tiargs = arraySyntaxCopy(tiargs); | |
3073 | |
3074 ScopeDsymbol::syntaxCopy(ti); | |
3075 return ti; | |
3076 } | |
3077 | |
3078 | |
3079 void TemplateInstance::semantic(Scope *sc) | |
3080 { | |
3081 if (global.errors) | |
3082 { | |
3083 if (!global.gag) | |
3084 { | |
3085 /* Trying to soldier on rarely generates useful messages | |
3086 * at this point. | |
3087 */ | |
3088 fatal(); | |
3089 } | |
3090 return; | |
3091 } | |
3092 #if LOG | |
3093 printf("\n+TemplateInstance::semantic('%s', this=%p)\n", toChars(), this); | |
3094 #endif | |
3095 if (inst) // if semantic() was already run | |
3096 { | |
3097 #if LOG | |
3098 printf("-TemplateInstance::semantic('%s', this=%p) already run\n", inst->toChars(), inst); | |
3099 #endif | |
3100 return; | |
3101 } | |
3102 | |
3103 if (semanticdone != 0) | |
3104 { | |
3105 error(loc, "recursive template expansion"); | |
3106 // inst = this; | |
3107 return; | |
3108 } | |
3109 semanticdone = 1; | |
3110 | |
3111 // get the enclosing template instance from the scope tinst | |
3112 tinst = sc->tinst; | |
3113 | |
3114 #if LOG | |
3115 printf("\tdo semantic\n"); | |
3116 #endif | |
3117 if (havetempdecl) | |
3118 { | |
3119 assert((size_t)tempdecl->scope > 0x10000); | |
3120 // Deduce tdtypes | |
3121 tdtypes.setDim(tempdecl->parameters->dim); | |
3122 if (!tempdecl->matchWithInstance(this, &tdtypes, 2)) | |
3123 { | |
3124 error("incompatible arguments for template instantiation"); | |
3125 inst = this; | |
3126 return; | |
3127 } | |
3128 } | |
3129 else | |
3130 { | |
3131 /* Run semantic on each argument, place results in tiargs[] | |
3132 * (if we havetempdecl, then tiargs is already evaluated) | |
3133 */ | |
3134 semanticTiargs(sc); | |
3135 | |
3136 tempdecl = findTemplateDeclaration(sc); | |
3137 if (tempdecl) | |
3138 tempdecl = findBestMatch(sc); | |
3139 if (!tempdecl || global.errors) | |
3140 { inst = this; | |
3141 //printf("error return %p, %d\n", tempdecl, global.errors); | |
3142 return; // error recovery | |
3143 } | |
3144 } | |
3145 | |
3146 isNested(tiargs); | |
3147 | |
3148 /* See if there is an existing TemplateInstantiation that already | |
3149 * implements the typeargs. If so, just refer to that one instead. | |
3150 */ | |
3151 | |
3152 for (size_t i = 0; i < tempdecl->instances.dim; i++) | |
3153 { | |
3154 TemplateInstance *ti = (TemplateInstance *)tempdecl->instances.data[i]; | |
3155 #if LOG | |
3156 printf("\t%s: checking for match with instance %d (%p): '%s'\n", toChars(), i, ti, ti->toChars()); | |
3157 #endif | |
3158 assert(tdtypes.dim == ti->tdtypes.dim); | |
3159 | |
3160 // Nesting must match | |
3161 if (isnested != ti->isnested) | |
3162 continue; | |
3163 #if 0 | |
3164 if (isnested && sc->parent != ti->parent) | |
3165 continue; | |
3166 #endif | |
3167 for (size_t j = 0; j < tdtypes.dim; j++) | |
3168 { Object *o1 = (Object *)tdtypes.data[j]; | |
3169 Object *o2 = (Object *)ti->tdtypes.data[j]; | |
3170 if (!match(o1, o2, tempdecl, sc)) | |
3171 goto L1; | |
3172 } | |
3173 | |
3174 // It's a match | |
3175 inst = ti; | |
3176 parent = ti->parent; | |
3177 #if LOG | |
3178 printf("\tit's a match with instance %p\n", inst); | |
3179 #endif | |
3180 return; | |
3181 | |
3182 L1: | |
3183 ; | |
3184 } | |
3185 | |
3186 /* So, we need to implement 'this' instance. | |
3187 */ | |
3188 #if LOG | |
3189 printf("\timplement template instance '%s'\n", toChars()); | |
3190 #endif | |
3191 unsigned errorsave = global.errors; | |
3192 inst = this; | |
3193 int tempdecl_instance_idx = tempdecl->instances.dim; | |
3194 tempdecl->instances.push(this); | |
3195 parent = tempdecl->parent; | |
3196 //printf("parent = '%s'\n", parent->kind()); | |
3197 | |
3198 ident = genIdent(); // need an identifier for name mangling purposes. | |
3199 | |
3200 #if 1 | |
3201 if (isnested) | |
3202 parent = isnested; | |
3203 #endif | |
3204 //printf("parent = '%s'\n", parent->kind()); | |
3205 | |
3206 // Add 'this' to the enclosing scope's members[] so the semantic routines | |
3207 // will get called on the instance members | |
3208 #if 1 | |
3209 int dosemantic3 = 0; | |
3210 { Array *a; | |
3211 | |
3212 Scope *scx = sc; | |
3213 #if 0 | |
3214 for (scx = sc; scx; scx = scx->enclosing) | |
3215 if (scx->scopesym) | |
3216 break; | |
3217 #endif | |
3218 | |
3219 //if (scx && scx->scopesym) printf("3: scx is %s %s\n", scx->scopesym->kind(), scx->scopesym->toChars()); | |
3220 if (scx && scx->scopesym && scx->scopesym->members && !scx->scopesym->isTemplateMixin()) | |
3221 { | |
3222 //printf("\t1: adding to %s %s\n", scx->scopesym->kind(), scx->scopesym->toChars()); | |
3223 a = scx->scopesym->members; | |
3224 } | |
3225 else | |
3226 { Module *m = sc->module->importedFrom; | |
3227 //printf("\t2: adding to module %s instead of module %s\n", m->toChars(), sc->module->toChars()); | |
3228 a = m->members; | |
3229 if (m->semanticdone >= 3) | |
3230 dosemantic3 = 1; | |
3231 } | |
3232 for (int i = 0; 1; i++) | |
3233 { | |
3234 if (i == a->dim) | |
3235 { | |
3236 a->push(this); | |
3237 break; | |
3238 } | |
3239 if (this == (Dsymbol *)a->data[i]) // if already in Array | |
3240 break; | |
3241 } | |
3242 } | |
3243 #endif | |
3244 | |
3245 // Copy the syntax trees from the TemplateDeclaration | |
3246 members = Dsymbol::arraySyntaxCopy(tempdecl->members); | |
3247 | |
3248 // Create our own scope for the template parameters | |
3249 Scope *scope = tempdecl->scope; | |
3250 if (!scope) | |
3251 { | |
3252 error("forward reference to template declaration %s\n", tempdecl->toChars()); | |
3253 return; | |
3254 } | |
3255 | |
3256 #if LOG | |
3257 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
3258 #endif | |
3259 argsym = new ScopeDsymbol(); | |
3260 argsym->parent = scope->parent; | |
3261 scope = scope->push(argsym); | |
3262 | |
3263 // Declare each template parameter as an alias for the argument type | |
3264 declareParameters(scope); | |
3265 | |
3266 // Add members of template instance to template instance symbol table | |
3267 // parent = scope->scopesym; | |
3268 symtab = new DsymbolTable(); | |
3269 int memnum = 0; | |
3270 for (int i = 0; i < members->dim; i++) | |
3271 { | |
3272 Dsymbol *s = (Dsymbol *)members->data[i]; | |
3273 #if LOG | |
3274 printf("\t[%d] adding member '%s' %p kind %s to '%s', memnum = %d\n", i, s->toChars(), s, s->kind(), this->toChars(), memnum); | |
3275 #endif | |
3276 memnum |= s->addMember(scope, this, memnum); | |
3277 } | |
3278 #if LOG | |
3279 printf("adding members done\n"); | |
3280 #endif | |
3281 | |
3282 /* See if there is only one member of template instance, and that | |
3283 * member has the same name as the template instance. | |
3284 * If so, this template instance becomes an alias for that member. | |
3285 */ | |
3286 //printf("members->dim = %d\n", members->dim); | |
3287 if (members->dim) | |
3288 { | |
3289 Dsymbol *s; | |
3290 if (Dsymbol::oneMembers(members, &s) && s) | |
3291 { | |
3292 //printf("s->kind = '%s'\n", s->kind()); | |
3293 //s->print(); | |
3294 //printf("'%s', '%s'\n", s->ident->toChars(), tempdecl->ident->toChars()); | |
3295 if (s->ident && s->ident->equals(tempdecl->ident)) | |
3296 { | |
3297 //printf("setting aliasdecl\n"); | |
3298 aliasdecl = new AliasDeclaration(loc, s->ident, s); | |
3299 } | |
3300 } | |
3301 } | |
3302 | |
3303 // Do semantic() analysis on template instance members | |
3304 #if LOG | |
3305 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
3306 #endif | |
3307 Scope *sc2; | |
3308 sc2 = scope->push(this); | |
3309 //printf("isnested = %d, sc->parent = %s\n", isnested, sc->parent->toChars()); | |
3310 sc2->parent = /*isnested ? sc->parent :*/ this; | |
3311 sc2->tinst = this; | |
3312 | |
3313 #if !IN_LLVM | |
3314 #if _WIN32 | |
3315 __try | |
3316 { | |
3317 #endif | |
3318 #endif | |
3319 for (int i = 0; i < members->dim; i++) | |
3320 { | |
3321 Dsymbol *s = (Dsymbol *)members->data[i]; | |
3322 //printf("\t[%d] semantic on '%s' %p kind %s in '%s'\n", i, s->toChars(), s, s->kind(), this->toChars()); | |
3323 //printf("test: isnested = %d, sc2->parent = %s\n", isnested, sc2->parent->toChars()); | |
3324 // if (isnested) | |
3325 // s->parent = sc->parent; | |
3326 //printf("test3: isnested = %d, s->parent = %s\n", isnested, s->parent->toChars()); | |
3327 s->semantic(sc2); | |
3328 //printf("test4: isnested = %d, s->parent = %s\n", isnested, s->parent->toChars()); | |
3329 sc2->module->runDeferredSemantic(); | |
3330 } | |
3331 #if !IN_LLVM | |
3332 #if _WIN32 | |
3333 } | |
3334 __except (__ehfilter(GetExceptionInformation())) | |
3335 { | |
3336 global.gag = 0; // ensure error message gets printed | |
3337 error("recursive expansion"); | |
3338 fatal(); | |
3339 } | |
3340 #endif | |
3341 #endif | |
3342 | |
3343 /* If any of the instantiation members didn't get semantic() run | |
3344 * on them due to forward references, we cannot run semantic2() | |
3345 * or semantic3() yet. | |
3346 */ | |
3347 for (size_t i = 0; i < Module::deferred.dim; i++) | |
3348 { Dsymbol *sd = (Dsymbol *)Module::deferred.data[i]; | |
3349 | |
3350 if (sd->parent == this) | |
3351 goto Laftersemantic; | |
3352 } | |
3353 | |
3354 /* The problem is when to parse the initializer for a variable. | |
3355 * Perhaps VarDeclaration::semantic() should do it like it does | |
3356 * for initializers inside a function. | |
3357 */ | |
3358 // if (sc->parent->isFuncDeclaration()) | |
3359 | |
3360 /* BUG 782: this has problems if the classes this depends on | |
3361 * are forward referenced. Find a way to defer semantic() | |
3362 * on this template. | |
3363 */ | |
3364 semantic2(sc2); | |
3365 | |
3366 if (sc->func || dosemantic3) | |
3367 { | |
3368 semantic3(sc2); | |
3369 } | |
3370 | |
3371 Laftersemantic: | |
3372 sc2->pop(); | |
3373 | |
3374 scope->pop(); | |
3375 | |
3376 // Give additional context info if error occurred during instantiation | |
3377 if (global.errors != errorsave) | |
3378 { | |
3379 error("error instantiating"); | |
3380 if(tinst) | |
3381 tinst->printInstantiationTrace(); | |
3382 errors = 1; | |
3383 if (global.gag) | |
3384 tempdecl->instances.remove(tempdecl_instance_idx); | |
3385 } | |
3386 | |
3387 #if LOG | |
3388 printf("-TemplateInstance::semantic('%s', this=%p)\n", toChars(), this); | |
3389 #endif | |
3390 } | |
3391 | |
3392 | |
3393 void TemplateInstance::semanticTiargs(Scope *sc) | |
3394 { | |
3395 //printf("+TemplateInstance::semanticTiargs() %s\n", toChars()); | |
3396 if (semantictiargsdone) | |
3397 return; | |
3398 semantictiargsdone = 1; | |
3399 semanticTiargs(loc, sc, tiargs, 0); | |
3400 } | |
3401 | |
3402 /********************************** | |
3403 * Input: | |
3404 * flags 1: replace const variables with their initializers | |
3405 */ | |
3406 | |
3407 void TemplateInstance::semanticTiargs(Loc loc, Scope *sc, Objects *tiargs, int flags) | |
3408 { | |
3409 // Run semantic on each argument, place results in tiargs[] | |
3410 //printf("+TemplateInstance::semanticTiargs()\n"); | |
3411 if (!tiargs) | |
3412 return; | |
3413 for (size_t j = 0; j < tiargs->dim; j++) | |
3414 { | |
3415 Object *o = (Object *)tiargs->data[j]; | |
3416 Type *ta = isType(o); | |
3417 Expression *ea = isExpression(o); | |
3418 Dsymbol *sa = isDsymbol(o); | |
3419 | |
3420 //printf("1: tiargs->data[%d] = %p, %p, %p, ea=%p, ta=%p\n", j, o, isDsymbol(o), isTuple(o), ea, ta); | |
3421 if (ta) | |
3422 { | |
3423 //printf("type %s\n", ta->toChars()); | |
3424 // It might really be an Expression or an Alias | |
3425 ta->resolve(loc, sc, &ea, &ta, &sa); | |
3426 if (ea) | |
3427 { | |
3428 ea = ea->semantic(sc); | |
3429 /* This test is to skip substituting a const var with | |
3430 * its initializer. The problem is the initializer won't | |
3431 * match with an 'alias' parameter. Instead, do the | |
3432 * const substitution in TemplateValueParameter::matchArg(). | |
3433 */ | |
3434 if (ea->op != TOKvar || flags & 1) | |
3435 ea = ea->optimize(WANTvalue | WANTinterpret); | |
3436 tiargs->data[j] = ea; | |
3437 } | |
3438 else if (sa) | |
3439 { tiargs->data[j] = sa; | |
3440 TupleDeclaration *d = sa->toAlias()->isTupleDeclaration(); | |
3441 if (d) | |
3442 { | |
3443 size_t dim = d->objects->dim; | |
3444 tiargs->remove(j); | |
3445 tiargs->insert(j, d->objects); | |
3446 j--; | |
3447 } | |
3448 } | |
3449 else if (ta) | |
3450 { | |
3451 if (ta->ty == Ttuple) | |
3452 { // Expand tuple | |
3453 TypeTuple *tt = (TypeTuple *)ta; | |
3454 size_t dim = tt->arguments->dim; | |
3455 tiargs->remove(j); | |
3456 if (dim) | |
3457 { tiargs->reserve(dim); | |
3458 for (size_t i = 0; i < dim; i++) | |
3459 { Argument *arg = (Argument *)tt->arguments->data[i]; | |
3460 tiargs->insert(j + i, arg->type); | |
3461 } | |
3462 } | |
3463 j--; | |
3464 } | |
3465 else | |
3466 tiargs->data[j] = ta; | |
3467 } | |
3468 else | |
3469 { | |
3470 assert(global.errors); | |
3471 tiargs->data[j] = Type::terror; | |
3472 } | |
3473 } | |
3474 else if (ea) | |
3475 { | |
3476 if (!ea) | |
3477 { assert(global.errors); | |
3478 ea = new IntegerExp(0); | |
3479 } | |
3480 assert(ea); | |
3481 ea = ea->semantic(sc); | |
3482 if (ea->op != TOKvar || flags & 1) | |
3483 ea = ea->optimize(WANTvalue | WANTinterpret); | |
3484 tiargs->data[j] = ea; | |
3485 if (ea->op == TOKtype) | |
3486 tiargs->data[j] = ea->type; | |
3487 } | |
3488 else if (sa) | |
3489 { | |
3490 } | |
3491 else | |
3492 { | |
3493 assert(0); | |
3494 } | |
3495 //printf("1: tiargs->data[%d] = %p\n", j, tiargs->data[j]); | |
3496 } | |
3497 #if 0 | |
3498 printf("-TemplateInstance::semanticTiargs('%s', this=%p)\n", toChars(), this); | |
3499 for (size_t j = 0; j < tiargs->dim; j++) | |
3500 { | |
3501 Object *o = (Object *)tiargs->data[j]; | |
3502 Type *ta = isType(o); | |
3503 Expression *ea = isExpression(o); | |
3504 Dsymbol *sa = isDsymbol(o); | |
3505 Tuple *va = isTuple(o); | |
3506 | |
3507 printf("\ttiargs[%d] = ta %p, ea %p, sa %p, va %p\n", j, ta, ea, sa, va); | |
3508 } | |
3509 #endif | |
3510 } | |
3511 | |
3512 /********************************************** | |
3513 * Find template declaration corresponding to template instance. | |
3514 */ | |
3515 | |
3516 TemplateDeclaration *TemplateInstance::findTemplateDeclaration(Scope *sc) | |
3517 { | |
3518 //printf("TemplateInstance::findTemplateDeclaration() %s\n", toChars()); | |
3519 if (!tempdecl) | |
3520 { | |
3521 /* Given: | |
3522 * foo!( ... ) | |
3523 * figure out which TemplateDeclaration foo refers to. | |
3524 */ | |
3525 Dsymbol *s; | |
3526 Dsymbol *scopesym; | |
3527 Identifier *id; | |
3528 int i; | |
3529 | |
3530 id = name; | |
3531 s = sc->search(loc, id, &scopesym); | |
3532 if (!s) | |
3533 { error("identifier '%s' is not defined", id->toChars()); | |
3534 return NULL; | |
3535 } | |
3536 #if LOG | |
3537 printf("It's an instance of '%s' kind '%s'\n", s->toChars(), s->kind()); | |
3538 if (s->parent) | |
3539 printf("s->parent = '%s'\n", s->parent->toChars()); | |
3540 #endif | |
3541 withsym = scopesym->isWithScopeSymbol(); | |
3542 | |
3543 /* We might have found an alias within a template when | |
3544 * we really want the template. | |
3545 */ | |
3546 TemplateInstance *ti; | |
3547 if (s->parent && | |
3548 (ti = s->parent->isTemplateInstance()) != NULL) | |
3549 { | |
3550 if ( | |
3551 (ti->name == id || | |
3552 ti->toAlias()->ident == id) | |
3553 && | |
3554 ti->tempdecl) | |
3555 { | |
3556 /* This is so that one can refer to the enclosing | |
3557 * template, even if it has the same name as a member | |
3558 * of the template, if it has a !(arguments) | |
3559 */ | |
3560 tempdecl = ti->tempdecl; | |
3561 if (tempdecl->overroot) // if not start of overloaded list of TemplateDeclaration's | |
3562 tempdecl = tempdecl->overroot; // then get the start | |
3563 s = tempdecl; | |
3564 } | |
3565 } | |
3566 | |
3567 s = s->toAlias(); | |
3568 | |
3569 /* It should be a TemplateDeclaration, not some other symbol | |
3570 */ | |
3571 tempdecl = s->isTemplateDeclaration(); | |
3572 if (!tempdecl) | |
3573 { | |
3574 if (!s->parent && global.errors) | |
3575 return NULL; | |
3576 if (!s->parent && s->getType()) | |
3577 { Dsymbol *s2 = s->getType()->toDsymbol(sc); | |
3578 if (!s2) | |
3579 { | |
3580 error("%s is not a template declaration, it is a %s", id->toChars(), s->kind()); | |
3581 return NULL; | |
3582 } | |
3583 s = s2; | |
3584 } | |
3585 #ifdef DEBUG | |
3586 //if (!s->parent) printf("s = %s %s\n", s->kind(), s->toChars()); | |
3587 #endif | |
3588 //assert(s->parent); | |
3589 TemplateInstance *ti = s->parent ? s->parent->isTemplateInstance() : NULL; | |
3590 if (ti && | |
3591 (ti->name == id || | |
3592 ti->toAlias()->ident == id) | |
3593 && | |
3594 ti->tempdecl) | |
3595 { | |
3596 /* This is so that one can refer to the enclosing | |
3597 * template, even if it has the same name as a member | |
3598 * of the template, if it has a !(arguments) | |
3599 */ | |
3600 tempdecl = ti->tempdecl; | |
3601 if (tempdecl->overroot) // if not start of overloaded list of TemplateDeclaration's | |
3602 tempdecl = tempdecl->overroot; // then get the start | |
3603 } | |
3604 else | |
3605 { | |
3606 error("%s is not a template declaration, it is a %s", id->toChars(), s->kind()); | |
3607 return NULL; | |
3608 } | |
3609 } | |
3610 } | |
3611 else | |
3612 assert(tempdecl->isTemplateDeclaration()); | |
3613 return tempdecl; | |
3614 } | |
3615 | |
3616 TemplateDeclaration *TemplateInstance::findBestMatch(Scope *sc) | |
3617 { | |
3618 /* Since there can be multiple TemplateDeclaration's with the same | |
3619 * name, look for the best match. | |
3620 */ | |
3621 TemplateDeclaration *td_ambig = NULL; | |
3622 TemplateDeclaration *td_best = NULL; | |
3623 MATCH m_best = MATCHnomatch; | |
3624 Objects dedtypes; | |
3625 | |
3626 #if LOG | |
3627 printf("TemplateInstance::findBestMatch()\n"); | |
3628 #endif | |
3629 for (TemplateDeclaration *td = tempdecl; td; td = td->overnext) | |
3630 { | |
3631 MATCH m; | |
3632 | |
3633 //if (tiargs->dim) printf("2: tiargs->dim = %d, data[0] = %p\n", tiargs->dim, tiargs->data[0]); | |
3634 | |
3635 // If more arguments than parameters, | |
3636 // then this is no match. | |
3637 if (td->parameters->dim < tiargs->dim) | |
3638 { | |
3639 if (!td->isVariadic()) | |
3640 continue; | |
3641 } | |
3642 | |
3643 dedtypes.setDim(td->parameters->dim); | |
3644 dedtypes.zero(); | |
3645 if (!td->scope) | |
3646 { | |
3647 error("forward reference to template declaration %s", td->toChars()); | |
3648 return NULL; | |
3649 } | |
3650 m = td->matchWithInstance(this, &dedtypes, 0); | |
3651 //printf("matchWithInstance = %d\n", m); | |
3652 if (!m) // no match at all | |
3653 continue; | |
3654 | |
3655 if (m < m_best) | |
3656 goto Ltd_best; | |
3657 if (m > m_best) | |
3658 goto Ltd; | |
3659 | |
3660 { | |
3661 // Disambiguate by picking the most specialized TemplateDeclaration | |
3662 MATCH c1 = td->leastAsSpecialized(td_best); | |
3663 MATCH c2 = td_best->leastAsSpecialized(td); | |
3664 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
3665 | |
3666 if (c1 > c2) | |
3667 goto Ltd; | |
3668 else if (c1 < c2) | |
3669 goto Ltd_best; | |
3670 else | |
3671 goto Lambig; | |
3672 } | |
3673 | |
3674 Lambig: // td_best and td are ambiguous | |
3675 td_ambig = td; | |
3676 continue; | |
3677 | |
3678 Ltd_best: // td_best is the best match so far | |
3679 td_ambig = NULL; | |
3680 continue; | |
3681 | |
3682 Ltd: // td is the new best match | |
3683 td_ambig = NULL; | |
3684 td_best = td; | |
3685 m_best = m; | |
3686 tdtypes.setDim(dedtypes.dim); | |
3687 memcpy(tdtypes.data, dedtypes.data, tdtypes.dim * sizeof(void *)); | |
3688 continue; | |
3689 } | |
3690 | |
3691 if (!td_best) | |
3692 { | |
3693 if (tempdecl && !tempdecl->overnext) | |
3694 // Only one template, so we can give better error message | |
3695 error("%s does not match template declaration %s", toChars(), tempdecl->toChars()); | |
3696 else | |
3697 error("%s does not match any template declaration", toChars()); | |
3698 return NULL; | |
3699 } | |
3700 if (td_ambig) | |
3701 { | |
3702 error("%s matches more than one template declaration, %s and %s", | |
3703 toChars(), td_best->toChars(), td_ambig->toChars()); | |
3704 } | |
3705 | |
3706 /* The best match is td_best | |
3707 */ | |
3708 tempdecl = td_best; | |
3709 | |
3710 #if 0 | |
3711 /* Cast any value arguments to be same type as value parameter | |
3712 */ | |
3713 for (size_t i = 0; i < tiargs->dim; i++) | |
3714 { Object *o = (Object *)tiargs->data[i]; | |
3715 Expression *ea = isExpression(o); // value argument | |
3716 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
3717 assert(tp); | |
3718 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
3719 if (tvp) | |
3720 { | |
3721 assert(ea); | |
3722 ea = ea->castTo(tvp->valType); | |
3723 ea = ea->optimize(WANTvalue | WANTinterpret); | |
3724 tiargs->data[i] = (Object *)ea; | |
3725 } | |
3726 } | |
3727 #endif | |
3728 | |
3729 #if LOG | |
3730 printf("\tIt's a match with template declaration '%s'\n", tempdecl->toChars()); | |
3731 #endif | |
3732 return tempdecl; | |
3733 } | |
3734 | |
3735 | |
3736 /***************************************** | |
3737 * Determines if a TemplateInstance will need a nested | |
3738 * generation of the TemplateDeclaration. | |
3739 */ | |
3740 | |
3741 int TemplateInstance::isNested(Objects *args) | |
3742 { int nested = 0; | |
3743 //printf("TemplateInstance::isNested('%s')\n", tempdecl->ident->toChars()); | |
3744 | |
3745 /* A nested instance happens when an argument references a local | |
3746 * symbol that is on the stack. | |
3747 */ | |
3748 for (size_t i = 0; i < args->dim; i++) | |
3749 { Object *o = (Object *)args->data[i]; | |
3750 Expression *ea = isExpression(o); | |
3751 Dsymbol *sa = isDsymbol(o); | |
3752 Tuple *va = isTuple(o); | |
3753 if (ea) | |
3754 { | |
3755 if (ea->op == TOKvar) | |
3756 { | |
3757 sa = ((VarExp *)ea)->var; | |
3758 goto Lsa; | |
3759 } | |
3760 if (ea->op == TOKfunction) | |
3761 { | |
3762 sa = ((FuncExp *)ea)->fd; | |
3763 goto Lsa; | |
3764 } | |
3765 } | |
3766 else if (sa) | |
3767 { | |
3768 Lsa: | |
3769 Declaration *d = sa->isDeclaration(); | |
3770 if (d && !d->isDataseg() && | |
3771 #if DMDV2 | |
3772 !(d->storage_class & STCmanifest) && | |
3773 #endif | |
3774 (!d->isFuncDeclaration() || d->isFuncDeclaration()->isNested()) && | |
3775 !isTemplateMixin()) | |
3776 { | |
3777 // if module level template | |
3778 if (tempdecl->toParent()->isModule()) | |
3779 { Dsymbol *dparent = d->toParent(); | |
3780 if (!isnested) | |
3781 isnested = dparent; | |
3782 else if (isnested != dparent) | |
3783 { | |
3784 /* Select the more deeply nested of the two. | |
3785 * Error if one is not nested inside the other. | |
3786 */ | |
3787 for (Dsymbol *p = isnested; p; p = p->parent) | |
3788 { | |
3789 if (p == dparent) | |
3790 goto L1; // isnested is most nested | |
3791 } | |
3792 for (Dsymbol *p = dparent; 1; p = p->parent) | |
3793 { | |
3794 if (p == isnested) | |
3795 { isnested = dparent; | |
3796 goto L1; // dparent is most nested | |
3797 } | |
3798 } | |
3799 error("is nested in both %s and %s", isnested->toChars(), dparent->toChars()); | |
3800 } | |
3801 L1: | |
3802 //printf("\tnested inside %s\n", isnested->toChars()); | |
3803 nested |= 1; | |
3804 } | |
3805 else | |
3806 error("cannot use local '%s' as parameter to non-global template %s", d->toChars(), tempdecl->toChars()); | |
3807 } | |
3808 } | |
3809 else if (va) | |
3810 { | |
3811 nested |= isNested(&va->objects); | |
3812 } | |
3813 } | |
3814 return nested; | |
3815 } | |
3816 | |
3817 /**************************************** | |
3818 * This instance needs an identifier for name mangling purposes. | |
3819 * Create one by taking the template declaration name and adding | |
3820 * the type signature for it. | |
3821 */ | |
3822 | |
3823 Identifier *TemplateInstance::genIdent() | |
3824 { OutBuffer buf; | |
3825 char *id; | |
3826 Objects *args; | |
3827 | |
3828 //printf("TemplateInstance::genIdent('%s')\n", tempdecl->ident->toChars()); | |
3829 id = tempdecl->ident->toChars(); | |
3830 buf.printf("__T%"PRIuSIZE"%s", strlen(id), id); | |
3831 args = tiargs; | |
3832 for (int i = 0; i < args->dim; i++) | |
3833 { Object *o = (Object *)args->data[i]; | |
3834 Type *ta = isType(o); | |
3835 Expression *ea = isExpression(o); | |
3836 Dsymbol *sa = isDsymbol(o); | |
3837 Tuple *va = isTuple(o); | |
3838 //printf("\to %p ta %p ea %p sa %p va %p\n", o, ta, ea, sa, va); | |
3839 if (ta) | |
3840 { | |
3841 buf.writeByte('T'); | |
3842 if (ta->deco) | |
3843 buf.writestring(ta->deco); | |
3844 else | |
3845 { | |
3846 #ifdef DEBUG | |
3847 printf("ta = %d, %s\n", ta->ty, ta->toChars()); | |
3848 #endif | |
3849 assert(global.errors); | |
3850 } | |
3851 } | |
3852 else if (ea) | |
3853 { | |
3854 Lea: | |
3855 sinteger_t v; | |
3856 real_t r; | |
3857 | |
3858 ea = ea->optimize(WANTvalue | WANTinterpret); | |
3859 if (ea->op == TOKvar) | |
3860 { | |
3861 sa = ((VarExp *)ea)->var; | |
3862 ea = NULL; | |
3863 goto Lsa; | |
3864 } | |
3865 if (ea->op == TOKfunction) | |
3866 { | |
3867 sa = ((FuncExp *)ea)->fd; | |
3868 ea = NULL; | |
3869 goto Lsa; | |
3870 } | |
3871 buf.writeByte('V'); | |
3872 if (ea->op == TOKtuple) | |
3873 { ea->error("tuple is not a valid template value argument"); | |
3874 continue; | |
3875 } | |
3876 #if 1 | |
3877 /* Use deco that matches what it would be for a function parameter | |
3878 */ | |
3879 //buf.writestring(ea->type->toHeadMutable()->deco); | |
3880 buf.writestring(ea->type->deco); | |
3881 #else | |
3882 // Use type of parameter, not type of argument | |
3883 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
3884 assert(tp); | |
3885 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
3886 assert(tvp); | |
3887 buf.writestring(tvp->valType->deco); | |
3888 #endif | |
3889 ea->toMangleBuffer(&buf); | |
3890 } | |
3891 else if (sa) | |
3892 { | |
3893 Lsa: | |
3894 buf.writeByte('S'); | |
3895 Declaration *d = sa->isDeclaration(); | |
3896 if (d && !d->type->deco) | |
3897 { error("forward reference of %s", d->toChars()); | |
3898 continue; | |
3899 } | |
3900 #if 0 | |
3901 VarDeclaration *v = sa->isVarDeclaration(); | |
3902 if (v && v->storage_class & STCmanifest) | |
3903 { ExpInitializer *ei = v->init->isExpInitializer(); | |
3904 if (ei) | |
3905 { | |
3906 ea = ei->exp; | |
3907 goto Lea; | |
3908 } | |
3909 } | |
3910 #endif | |
3911 const char *p = sa->mangle(); | |
3912 buf.printf("%zu%s", strlen(p), p); | |
3913 } | |
3914 else if (va) | |
3915 { | |
3916 assert(i + 1 == args->dim); // must be last one | |
3917 args = &va->objects; | |
3918 i = -1; | |
3919 } | |
3920 else | |
3921 assert(0); | |
3922 } | |
3923 buf.writeByte('Z'); | |
3924 id = buf.toChars(); | |
3925 buf.data = NULL; | |
3926 //printf("\tgenIdent = %s\n", id); | |
3927 return new Identifier(id, TOKidentifier); | |
3928 } | |
3929 | |
3930 | |
3931 /**************************************************** | |
3932 * Declare parameters of template instance, initialize them with the | |
3933 * template instance arguments. | |
3934 */ | |
3935 | |
3936 void TemplateInstance::declareParameters(Scope *scope) | |
3937 { | |
3938 //printf("TemplateInstance::declareParameters()\n"); | |
3939 for (int i = 0; i < tdtypes.dim; i++) | |
3940 { | |
3941 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
3942 //Object *o = (Object *)tiargs->data[i]; | |
3943 Object *o = (Object *)tdtypes.data[i]; // initializer for tp | |
3944 | |
3945 //printf("\ttdtypes[%d] = %p\n", i, o); | |
3946 tempdecl->declareParameter(scope, tp, o); | |
3947 } | |
3948 } | |
3949 | |
3950 | |
3951 void TemplateInstance::semantic2(Scope *sc) | |
3952 { int i; | |
3953 | |
3954 if (semanticdone >= 2) | |
3955 return; | |
3956 semanticdone = 2; | |
3957 #if LOG | |
3958 printf("+TemplateInstance::semantic2('%s')\n", toChars()); | |
3959 #endif | |
3960 if (!errors && members) | |
3961 { | |
3962 sc = tempdecl->scope; | |
3963 assert(sc); | |
3964 sc = sc->push(argsym); | |
3965 sc = sc->push(this); | |
3966 sc->tinst = this; | |
3967 for (i = 0; i < members->dim; i++) | |
3968 { | |
3969 Dsymbol *s = (Dsymbol *)members->data[i]; | |
3970 #if LOG | |
3971 printf("\tmember '%s', kind = '%s'\n", s->toChars(), s->kind()); | |
3972 #endif | |
3973 s->semantic2(sc); | |
3974 } | |
3975 sc = sc->pop(); | |
3976 sc->pop(); | |
3977 } | |
3978 #if LOG | |
3979 printf("-TemplateInstance::semantic2('%s')\n", toChars()); | |
3980 #endif | |
3981 } | |
3982 | |
3983 void TemplateInstance::semantic3(Scope *sc) | |
3984 { | |
3985 #if LOG | |
3986 printf("TemplateInstance::semantic3('%s'), semanticdone = %d\n", toChars(), semanticdone); | |
3987 #endif | |
3988 //if (toChars()[0] == 'D') *(char*)0=0; | |
3989 if (semanticdone >= 3) | |
3990 return; | |
3991 semanticdone = 3; | |
3992 if (!errors && members) | |
3993 { | |
3994 sc = tempdecl->scope; | |
3995 sc = sc->push(argsym); | |
3996 sc = sc->push(this); | |
3997 sc->tinst = this; | |
3998 for (int i = 0; i < members->dim; i++) | |
3999 { | |
4000 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4001 s->semantic3(sc); | |
4002 } | |
4003 sc = sc->pop(); | |
4004 sc->pop(); | |
4005 } | |
4006 } | |
4007 | |
4008 void TemplateInstance::toObjFile(int multiobj) | |
4009 { | |
4010 #if LOG | |
4011 printf("TemplateInstance::toObjFile('%s', this = %p)\n", toChars(), this); | |
4012 #endif | |
4013 if (!errors && members) | |
4014 { | |
4015 if (multiobj) | |
4016 // Append to list of object files to be written later | |
4017 //obj_append(this); | |
4018 assert(0 && "multiobj"); | |
4019 else | |
4020 { | |
4021 for (int i = 0; i < members->dim; i++) | |
4022 { | |
4023 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4024 s->toObjFile(multiobj); | |
4025 } | |
4026 } | |
4027 } | |
4028 } | |
4029 | |
4030 void TemplateInstance::inlineScan() | |
4031 { | |
4032 #if LOG | |
4033 printf("TemplateInstance::inlineScan('%s')\n", toChars()); | |
4034 #endif | |
4035 if (!errors && members) | |
4036 { | |
4037 for (int i = 0; i < members->dim; i++) | |
4038 { | |
4039 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4040 s->inlineScan(); | |
4041 } | |
4042 } | |
4043 } | |
4044 | |
4045 void TemplateInstance::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4046 { | |
4047 int i; | |
4048 | |
4049 Identifier *id = name; | |
4050 buf->writestring(id->toChars()); | |
4051 buf->writestring("!("); | |
4052 if (nest) | |
4053 buf->writestring("..."); | |
4054 else | |
4055 { | |
4056 nest++; | |
4057 Objects *args = tiargs; | |
4058 for (i = 0; i < args->dim; i++) | |
4059 { | |
4060 if (i) | |
4061 buf->writeByte(','); | |
4062 Object *oarg = (Object *)args->data[i]; | |
4063 ObjectToCBuffer(buf, hgs, oarg); | |
4064 } | |
4065 nest--; | |
4066 } | |
4067 buf->writeByte(')'); | |
4068 } | |
4069 | |
4070 | |
4071 Dsymbol *TemplateInstance::toAlias() | |
4072 { | |
4073 #if LOG | |
4074 printf("TemplateInstance::toAlias()\n"); | |
4075 #endif | |
4076 if (!inst) | |
4077 { error("cannot resolve forward reference"); | |
4078 return this; | |
4079 } | |
4080 | |
4081 if (inst != this) | |
4082 return inst->toAlias(); | |
4083 | |
4084 if (aliasdecl) | |
4085 return aliasdecl->toAlias(); | |
4086 | |
4087 return inst; | |
4088 } | |
4089 | |
4090 AliasDeclaration *TemplateInstance::isAliasDeclaration() | |
4091 { | |
4092 return aliasdecl; | |
4093 } | |
4094 | |
4095 const char *TemplateInstance::kind() | |
4096 { | |
4097 return "template instance"; | |
4098 } | |
4099 | |
4100 int TemplateInstance::oneMember(Dsymbol **ps) | |
4101 { | |
4102 *ps = NULL; | |
4103 return TRUE; | |
4104 } | |
4105 | |
4106 char *TemplateInstance::toChars() | |
4107 { | |
4108 OutBuffer buf; | |
4109 HdrGenState hgs; | |
4110 char *s; | |
4111 | |
4112 toCBuffer(&buf, &hgs); | |
4113 s = buf.toChars(); | |
4114 buf.data = NULL; | |
4115 return s; | |
4116 } | |
4117 | |
4118 void TemplateInstance::printInstantiationTrace() | |
4119 { | |
4120 if(global.gag) | |
4121 return; | |
4122 | |
4123 const int max_shown = 6; | |
4124 | |
4125 // determine instantiation depth | |
4126 int n_instantiations = 1; | |
4127 TemplateInstance* cur = this; | |
4128 while(cur = cur->tinst) | |
4129 ++n_instantiations; | |
4130 | |
4131 // show full trace only if it's short or verbose is on | |
4132 if(n_instantiations <= max_shown || global.params.verbose) | |
4133 { | |
4134 cur = this; | |
4135 while(cur) | |
4136 { | |
4137 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); | |
4138 cur = cur->tinst; | |
4139 } | |
4140 } | |
4141 else | |
4142 { | |
4143 cur = this; | |
4144 size_t i = 0; | |
4145 for(; i < max_shown/2; ++i, cur = cur->tinst) | |
4146 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); | |
4147 fprintf(stdmsg," ... (%d instantiations, -v to show) ...\n", n_instantiations - max_shown); | |
4148 for(; i < n_instantiations - max_shown + max_shown/2; ++i, cur = cur->tinst) | |
4149 {} | |
4150 for(; i < n_instantiations; ++i, cur = cur->tinst) | |
4151 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); | |
4152 } | |
4153 } | |
4154 | |
4155 /* ======================== TemplateMixin ================================ */ | |
4156 | |
4157 TemplateMixin::TemplateMixin(Loc loc, Identifier *ident, Type *tqual, | |
4158 Array *idents, Objects *tiargs) | |
4159 : TemplateInstance(loc, (Identifier *)idents->data[idents->dim - 1]) | |
4160 { | |
4161 //printf("TemplateMixin(ident = '%s')\n", ident ? ident->toChars() : ""); | |
4162 this->ident = ident; | |
4163 this->tqual = tqual; | |
4164 this->idents = idents; | |
4165 this->tiargs = tiargs ? tiargs : new Objects(); | |
4166 this->scope = NULL; | |
4167 } | |
4168 | |
4169 Dsymbol *TemplateMixin::syntaxCopy(Dsymbol *s) | |
4170 { TemplateMixin *tm; | |
4171 | |
4172 Array *ids = new Array(); | |
4173 ids->setDim(idents->dim); | |
4174 for (int i = 0; i < idents->dim; i++) | |
4175 { // Matches TypeQualified::syntaxCopyHelper() | |
4176 Identifier *id = (Identifier *)idents->data[i]; | |
4177 if (id->dyncast() == DYNCAST_DSYMBOL) | |
4178 { | |
4179 TemplateInstance *ti = (TemplateInstance *)id; | |
4180 | |
4181 ti = (TemplateInstance *)ti->syntaxCopy(NULL); | |
4182 id = (Identifier *)ti; | |
4183 } | |
4184 ids->data[i] = id; | |
4185 } | |
4186 | |
4187 tm = new TemplateMixin(loc, ident, | |
4188 (Type *)(tqual ? tqual->syntaxCopy() : NULL), | |
4189 ids, tiargs); | |
4190 TemplateInstance::syntaxCopy(tm); | |
4191 return tm; | |
4192 } | |
4193 | |
4194 void TemplateMixin::semantic(Scope *sc) | |
4195 { | |
4196 #if LOG | |
4197 printf("+TemplateMixin::semantic('%s', this=%p)\n", toChars(), this); | |
4198 fflush(stdout); | |
4199 #endif | |
4200 if (semanticdone && | |
4201 // This for when a class/struct contains mixin members, and | |
4202 // is done over because of forward references | |
4203 (!parent || !toParent()->isAggregateDeclaration())) | |
4204 { | |
4205 #if LOG | |
4206 printf("\tsemantic done\n"); | |
4207 #endif | |
4208 return; | |
4209 } | |
4210 if (!semanticdone) | |
4211 semanticdone = 1; | |
4212 #if LOG | |
4213 printf("\tdo semantic\n"); | |
4214 #endif | |
4215 | |
4216 #if !IN_LLVM | |
4217 // dont know what this is | |
4218 util_progress(); | |
4219 #endif | |
4220 | |
4221 Scope *scx = NULL; | |
4222 if (scope) | |
4223 { sc = scope; | |
4224 scx = scope; // save so we don't make redundant copies | |
4225 scope = NULL; | |
4226 } | |
4227 | |
4228 // Follow qualifications to find the TemplateDeclaration | |
4229 if (!tempdecl) | |
4230 { Dsymbol *s; | |
4231 int i; | |
4232 Identifier *id; | |
4233 | |
4234 if (tqual) | |
4235 { s = tqual->toDsymbol(sc); | |
4236 i = 0; | |
4237 } | |
4238 else | |
4239 { | |
4240 i = 1; | |
4241 id = (Identifier *)idents->data[0]; | |
4242 switch (id->dyncast()) | |
4243 { | |
4244 case DYNCAST_IDENTIFIER: | |
4245 s = sc->search(loc, id, NULL); | |
4246 break; | |
4247 | |
4248 case DYNCAST_DSYMBOL: | |
4249 { | |
4250 TemplateInstance *ti = (TemplateInstance *)id; | |
4251 ti->semantic(sc); | |
4252 s = ti; | |
4253 break; | |
4254 } | |
4255 default: | |
4256 assert(0); | |
4257 } | |
4258 } | |
4259 | |
4260 for (; i < idents->dim; i++) | |
4261 { | |
4262 if (!s) | |
4263 break; | |
4264 id = (Identifier *)idents->data[i]; | |
4265 s = s->searchX(loc, sc, id); | |
4266 } | |
4267 if (!s) | |
4268 { | |
4269 error("is not defined"); | |
4270 inst = this; | |
4271 return; | |
4272 } | |
4273 tempdecl = s->toAlias()->isTemplateDeclaration(); | |
4274 if (!tempdecl) | |
4275 { | |
4276 error("%s isn't a template", s->toChars()); | |
4277 inst = this; | |
4278 return; | |
4279 } | |
4280 } | |
4281 | |
4282 // Look for forward reference | |
4283 assert(tempdecl); | |
4284 for (TemplateDeclaration *td = tempdecl; td; td = td->overnext) | |
4285 { | |
4286 if (!td->scope) | |
4287 { | |
4288 /* Cannot handle forward references if mixin is a struct member, | |
4289 * because addField must happen during struct's semantic, not | |
4290 * during the mixin semantic. | |
4291 * runDeferred will re-run mixin's semantic outside of the struct's | |
4292 * semantic. | |
4293 */ | |
4294 semanticdone = 0; | |
4295 AggregateDeclaration *ad = toParent()->isAggregateDeclaration(); | |
4296 if (ad) | |
4297 ad->sizeok = 2; | |
4298 else | |
4299 { | |
4300 // Forward reference | |
4301 //printf("forward reference - deferring\n"); | |
4302 scope = scx ? scx : new Scope(*sc); | |
4303 scope->setNoFree(); | |
4304 scope->module->addDeferredSemantic(this); | |
4305 } | |
4306 return; | |
4307 } | |
4308 } | |
4309 | |
4310 // Run semantic on each argument, place results in tiargs[] | |
4311 semanticTiargs(sc); | |
4312 | |
4313 tempdecl = findBestMatch(sc); | |
4314 if (!tempdecl) | |
4315 { inst = this; | |
4316 return; // error recovery | |
4317 } | |
4318 | |
4319 if (!ident) | |
4320 ident = genIdent(); | |
4321 | |
4322 inst = this; | |
4323 parent = sc->parent; | |
4324 | |
4325 /* Detect recursive mixin instantiations. | |
4326 */ | |
4327 for (Dsymbol *s = parent; s; s = s->parent) | |
4328 { | |
4329 //printf("\ts = '%s'\n", s->toChars()); | |
4330 TemplateMixin *tm = s->isTemplateMixin(); | |
4331 if (!tm || tempdecl != tm->tempdecl) | |
4332 continue; | |
4333 | |
4334 /* Different argument list lengths happen with variadic args | |
4335 */ | |
4336 if (tiargs->dim != tm->tiargs->dim) | |
4337 continue; | |
4338 | |
4339 for (int i = 0; i < tiargs->dim; i++) | |
4340 { Object *o = (Object *)tiargs->data[i]; | |
4341 Type *ta = isType(o); | |
4342 Expression *ea = isExpression(o); | |
4343 Dsymbol *sa = isDsymbol(o); | |
4344 Object *tmo = (Object *)tm->tiargs->data[i]; | |
4345 if (ta) | |
4346 { | |
4347 Type *tmta = isType(tmo); | |
4348 if (!tmta) | |
4349 goto Lcontinue; | |
4350 if (!ta->equals(tmta)) | |
4351 goto Lcontinue; | |
4352 } | |
4353 else if (ea) | |
4354 { Expression *tme = isExpression(tmo); | |
4355 if (!tme || !ea->equals(tme)) | |
4356 goto Lcontinue; | |
4357 } | |
4358 else if (sa) | |
4359 { | |
4360 Dsymbol *tmsa = isDsymbol(tmo); | |
4361 if (sa != tmsa) | |
4362 goto Lcontinue; | |
4363 } | |
4364 else | |
4365 assert(0); | |
4366 } | |
4367 error("recursive mixin instantiation"); | |
4368 return; | |
4369 | |
4370 Lcontinue: | |
4371 continue; | |
4372 } | |
4373 | |
4374 // Copy the syntax trees from the TemplateDeclaration | |
4375 members = Dsymbol::arraySyntaxCopy(tempdecl->members); | |
4376 if (!members) | |
4377 return; | |
4378 | |
4379 symtab = new DsymbolTable(); | |
4380 | |
4381 for (Scope *sce = sc; 1; sce = sce->enclosing) | |
4382 { | |
4383 ScopeDsymbol *sds = (ScopeDsymbol *)sce->scopesym; | |
4384 if (sds) | |
4385 { | |
4386 sds->importScope(this, PROTpublic); | |
4387 break; | |
4388 } | |
4389 } | |
4390 | |
4391 #if LOG | |
4392 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
4393 #endif | |
4394 Scope *scy = sc; | |
4395 scy = sc->push(this); | |
4396 scy->parent = this; | |
4397 | |
4398 argsym = new ScopeDsymbol(); | |
4399 argsym->parent = scy->parent; | |
4400 Scope *scope = scy->push(argsym); | |
4401 | |
4402 unsigned errorsave = global.errors; | |
4403 | |
4404 // Declare each template parameter as an alias for the argument type | |
4405 declareParameters(scope); | |
4406 | |
4407 // Add members to enclosing scope, as well as this scope | |
4408 for (unsigned i = 0; i < members->dim; i++) | |
4409 { Dsymbol *s; | |
4410 | |
4411 s = (Dsymbol *)members->data[i]; | |
4412 s->addMember(scope, this, i); | |
4413 //sc->insert(s); | |
4414 //printf("sc->parent = %p, sc->scopesym = %p\n", sc->parent, sc->scopesym); | |
4415 //printf("s->parent = %s\n", s->parent->toChars()); | |
4416 } | |
4417 | |
4418 // Do semantic() analysis on template instance members | |
4419 #if LOG | |
4420 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
4421 #endif | |
4422 Scope *sc2; | |
4423 sc2 = scope->push(this); | |
4424 sc2->offset = sc->offset; | |
4425 for (int i = 0; i < members->dim; i++) | |
4426 { | |
4427 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4428 s->semantic(sc2); | |
4429 } | |
4430 sc->offset = sc2->offset; | |
4431 | |
4432 /* The problem is when to parse the initializer for a variable. | |
4433 * Perhaps VarDeclaration::semantic() should do it like it does | |
4434 * for initializers inside a function. | |
4435 */ | |
4436 // if (sc->parent->isFuncDeclaration()) | |
4437 | |
4438 semantic2(sc2); | |
4439 | |
4440 if (sc->func) | |
4441 { | |
4442 semantic3(sc2); | |
4443 } | |
4444 | |
4445 // Give additional context info if error occurred during instantiation | |
4446 if (global.errors != errorsave) | |
4447 { | |
4448 error("error instantiating"); | |
4449 } | |
4450 | |
4451 sc2->pop(); | |
4452 | |
4453 scope->pop(); | |
4454 | |
4455 // if (!isAnonymous()) | |
4456 { | |
4457 scy->pop(); | |
4458 } | |
4459 #if LOG | |
4460 printf("-TemplateMixin::semantic('%s', this=%p)\n", toChars(), this); | |
4461 #endif | |
4462 } | |
4463 | |
4464 void TemplateMixin::semantic2(Scope *sc) | |
4465 { int i; | |
4466 | |
4467 if (semanticdone >= 2) | |
4468 return; | |
4469 semanticdone = 2; | |
4470 #if LOG | |
4471 printf("+TemplateMixin::semantic2('%s')\n", toChars()); | |
4472 #endif | |
4473 if (members) | |
4474 { | |
4475 assert(sc); | |
4476 sc = sc->push(argsym); | |
4477 sc = sc->push(this); | |
4478 for (i = 0; i < members->dim; i++) | |
4479 { | |
4480 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4481 #if LOG | |
4482 printf("\tmember '%s', kind = '%s'\n", s->toChars(), s->kind()); | |
4483 #endif | |
4484 s->semantic2(sc); | |
4485 } | |
4486 sc = sc->pop(); | |
4487 sc->pop(); | |
4488 } | |
4489 #if LOG | |
4490 printf("-TemplateMixin::semantic2('%s')\n", toChars()); | |
4491 #endif | |
4492 } | |
4493 | |
4494 void TemplateMixin::semantic3(Scope *sc) | |
4495 { int i; | |
4496 | |
4497 if (semanticdone >= 3) | |
4498 return; | |
4499 semanticdone = 3; | |
4500 #if LOG | |
4501 printf("TemplateMixin::semantic3('%s')\n", toChars()); | |
4502 #endif | |
4503 if (members) | |
4504 { | |
4505 sc = sc->push(argsym); | |
4506 sc = sc->push(this); | |
4507 for (i = 0; i < members->dim; i++) | |
4508 { | |
4509 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4510 s->semantic3(sc); | |
4511 } | |
4512 sc = sc->pop(); | |
4513 sc->pop(); | |
4514 } | |
4515 } | |
4516 | |
4517 void TemplateMixin::inlineScan() | |
4518 { | |
4519 TemplateInstance::inlineScan(); | |
4520 } | |
4521 | |
4522 const char *TemplateMixin::kind() | |
4523 { | |
4524 return "mixin"; | |
4525 } | |
4526 | |
4527 int TemplateMixin::oneMember(Dsymbol **ps) | |
4528 { | |
4529 return Dsymbol::oneMember(ps); | |
4530 } | |
4531 | |
4532 int TemplateMixin::hasPointers() | |
4533 { | |
4534 //printf("TemplateMixin::hasPointers() %s\n", toChars()); | |
4535 for (size_t i = 0; i < members->dim; i++) | |
4536 { | |
4537 Dsymbol *s = (Dsymbol *)members->data[i]; | |
4538 //printf(" s = %s %s\n", s->kind(), s->toChars()); | |
4539 if (s->hasPointers()) | |
4540 { | |
4541 return 1; | |
4542 } | |
4543 } | |
4544 return 0; | |
4545 } | |
4546 | |
4547 char *TemplateMixin::toChars() | |
4548 { | |
4549 OutBuffer buf; | |
4550 HdrGenState hgs; | |
4551 char *s; | |
4552 | |
4553 TemplateInstance::toCBuffer(&buf, &hgs); | |
4554 s = buf.toChars(); | |
4555 buf.data = NULL; | |
4556 return s; | |
4557 } | |
4558 | |
4559 void TemplateMixin::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4560 { | |
4561 buf->writestring("mixin "); | |
4562 | |
4563 for (int i = 0; i < idents->dim; i++) | |
4564 { Identifier *id = (Identifier *)idents->data[i]; | |
4565 | |
4566 if (i) | |
4567 buf->writeByte('.'); | |
4568 buf->writestring(id->toChars()); | |
4569 } | |
4570 buf->writestring("!("); | |
4571 if (tiargs) | |
4572 { | |
4573 for (int i = 0; i < tiargs->dim; i++) | |
4574 { if (i) | |
4575 buf->writebyte(','); | |
4576 Object *oarg = (Object *)tiargs->data[i]; | |
4577 Type *t = isType(oarg); | |
4578 Expression *e = isExpression(oarg); | |
4579 Dsymbol *s = isDsymbol(oarg); | |
4580 if (t) | |
4581 t->toCBuffer(buf, NULL, hgs); | |
4582 else if (e) | |
4583 e->toCBuffer(buf, hgs); | |
4584 else if (s) | |
4585 { | |
4586 char *p = s->ident ? s->ident->toChars() : s->toChars(); | |
4587 buf->writestring(p); | |
4588 } | |
4589 else if (!oarg) | |
4590 { | |
4591 buf->writestring("NULL"); | |
4592 } | |
4593 else | |
4594 { | |
4595 assert(0); | |
4596 } | |
4597 } | |
4598 } | |
4599 buf->writebyte(')'); | |
4600 if (ident) | |
4601 { | |
4602 buf->writebyte(' '); | |
4603 buf->writestring(ident->toChars()); | |
4604 } | |
4605 buf->writebyte(';'); | |
4606 buf->writenl(); | |
4607 } | |
4608 | |
4609 | |
4610 void TemplateMixin::toObjFile(int multiobj) | |
4611 { | |
4612 //printf("TemplateMixin::toObjFile('%s')\n", toChars()); | |
4613 TemplateInstance::toObjFile(multiobj); | |
4614 } | |
4615 |