Mercurial > projects > ldc
annotate dmd/template.c @ 855:e78e1d559a76
Apply fix for #151.
| author | Christian Kamm <kamm incasoftware de> |
|---|---|
| date | Mon, 15 Dec 2008 21:09:33 +0100 |
| parents | eef8ac26c66c |
| children | 330f999ade44 |
| rev | line source |
|---|---|
| 336 | 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 } | |
| 190 else if (v1) | |
| 191 { | |
| 192 if (!v2) | |
| 193 goto Lnomatch; | |
| 194 if (v1->objects.dim != v2->objects.dim) | |
| 195 goto Lnomatch; | |
| 196 for (size_t i = 0; i < v1->objects.dim; i++) | |
| 197 { | |
| 198 if (!match((Object *)v1->objects.data[i], | |
| 199 (Object *)v2->objects.data[i], | |
| 200 tempdecl, sc)) | |
| 201 goto Lnomatch; | |
| 202 } | |
| 203 } | |
| 204 return 1; // match | |
| 205 Lnomatch: | |
| 206 return 0; // nomatch; | |
| 207 } | |
| 208 | |
| 209 /**************************************** | |
| 210 */ | |
| 211 | |
| 212 void ObjectToCBuffer(OutBuffer *buf, HdrGenState *hgs, Object *oarg) | |
| 213 { | |
| 214 //printf("ObjectToCBuffer()\n"); | |
| 215 Type *t = isType(oarg); | |
| 216 Expression *e = isExpression(oarg); | |
| 217 Dsymbol *s = isDsymbol(oarg); | |
| 218 Tuple *v = isTuple(oarg); | |
| 219 if (t) | |
| 220 { //printf("\tt: %s ty = %d\n", t->toChars(), t->ty); | |
| 221 t->toCBuffer(buf, NULL, hgs); | |
| 222 } | |
| 223 else if (e) | |
| 224 e->toCBuffer(buf, hgs); | |
| 225 else if (s) | |
| 226 { | |
| 227 char *p = s->ident ? s->ident->toChars() : s->toChars(); | |
| 228 buf->writestring(p); | |
| 229 } | |
| 230 else if (v) | |
| 231 { | |
| 232 Objects *args = &v->objects; | |
| 233 for (size_t i = 0; i < args->dim; i++) | |
| 234 { | |
| 235 if (i) | |
| 236 buf->writeByte(','); | |
| 237 Object *o = (Object *)args->data[i]; | |
| 238 ObjectToCBuffer(buf, hgs, o); | |
| 239 } | |
| 240 } | |
| 241 else if (!oarg) | |
| 242 { | |
| 243 buf->writestring("NULL"); | |
| 244 } | |
| 245 else | |
| 246 { | |
| 247 #ifdef DEBUG | |
| 248 printf("bad Object = %p\n", oarg); | |
| 249 #endif | |
| 250 assert(0); | |
| 251 } | |
| 252 } | |
| 253 | |
| 254 | |
| 255 | |
| 256 /* ======================== TemplateDeclaration ============================= */ | |
| 257 | |
| 258 TemplateDeclaration::TemplateDeclaration(Loc loc, Identifier *id, TemplateParameters *parameters, Array *decldefs) | |
| 259 : ScopeDsymbol(id) | |
| 260 { | |
| 261 #if LOG | |
| 262 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id->toChars()); | |
| 263 #endif | |
| 264 #if 0 | |
| 265 if (parameters) | |
| 266 for (int i = 0; i < parameters->dim; i++) | |
| 267 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 268 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 269 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
| 270 | |
| 271 if (ttp) | |
| 272 { | |
| 273 printf("\tparameter[%d] = %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : ""); | |
| 274 } | |
| 275 } | |
| 276 #endif | |
| 277 this->loc = loc; | |
| 278 this->parameters = parameters; | |
| 279 this->origParameters = parameters; | |
| 280 this->members = decldefs; | |
| 281 this->overnext = NULL; | |
| 282 this->overroot = NULL; | |
| 283 this->scope = NULL; | |
| 284 this->onemember = NULL; | |
| 285 } | |
| 286 | |
| 287 Dsymbol *TemplateDeclaration::syntaxCopy(Dsymbol *) | |
| 288 { | |
| 289 //printf("TemplateDeclaration::syntaxCopy()\n"); | |
| 290 TemplateDeclaration *td; | |
| 291 TemplateParameters *p; | |
| 292 Array *d; | |
| 293 | |
| 294 p = NULL; | |
| 295 if (parameters) | |
| 296 { | |
| 297 p = new TemplateParameters(); | |
| 298 p->setDim(parameters->dim); | |
| 299 for (int i = 0; i < p->dim; i++) | |
| 300 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 301 p->data[i] = (void *)tp->syntaxCopy(); | |
| 302 } | |
| 303 } | |
| 304 d = Dsymbol::arraySyntaxCopy(members); | |
| 305 td = new TemplateDeclaration(loc, ident, p, d); | |
|
527
cecfee2d01a8
Added support for overloaded intrinsics.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
336
diff
changeset
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306 |
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664
eef8ac26c66c
Some missed LLVMDC -> LDC.
Christian Kamm <kamm incasoftware de>
parents:
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307 // LDC |
|
527
cecfee2d01a8
Added support for overloaded intrinsics.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
336
diff
changeset
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308 td->intrinsicName = intrinsicName; |
|
cecfee2d01a8
Added support for overloaded intrinsics.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
336
diff
changeset
|
309 |
| 336 | 310 return td; |
| 311 } | |
| 312 | |
| 313 void TemplateDeclaration::semantic(Scope *sc) | |
| 314 { | |
| 315 #if LOG | |
| 316 printf("TemplateDeclaration::semantic(this = %p, id = '%s')\n", this, ident->toChars()); | |
| 317 #endif | |
| 318 if (scope) | |
| 319 return; // semantic() already run | |
| 320 | |
| 321 if (sc->func) | |
| 322 { | |
| 323 error("cannot declare template at function scope %s", sc->func->toChars()); | |
| 324 } | |
| 325 | |
| 326 if (/*global.params.useArrayBounds &&*/ sc->module) | |
| 327 { | |
| 328 // Generate this function as it may be used | |
| 329 // when template is instantiated in other modules | |
| 330 sc->module->toModuleArray(); | |
| 331 } | |
| 332 | |
| 333 if (/*global.params.useAssert &&*/ sc->module) | |
| 334 { | |
| 335 // Generate this function as it may be used | |
| 336 // when template is instantiated in other modules | |
| 337 sc->module->toModuleAssert(); | |
| 338 } | |
| 339 | |
| 340 /* Remember Scope for later instantiations, but make | |
| 341 * a copy since attributes can change. | |
| 342 */ | |
| 343 this->scope = new Scope(*sc); | |
| 344 this->scope->setNoFree(); | |
| 345 | |
| 346 // Set up scope for parameters | |
| 347 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
| 348 paramsym->parent = sc->parent; | |
| 349 Scope *paramscope = sc->push(paramsym); | |
| 350 paramscope->parameterSpecialization = 1; | |
| 351 | |
| 352 if (global.params.doDocComments) | |
| 353 { | |
| 354 origParameters = new TemplateParameters(); | |
| 355 origParameters->setDim(parameters->dim); | |
| 356 for (int i = 0; i < parameters->dim; i++) | |
| 357 { | |
| 358 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 359 origParameters->data[i] = (void *)tp->syntaxCopy(); | |
| 360 } | |
| 361 } | |
| 362 | |
| 363 for (int i = 0; i < parameters->dim; i++) | |
| 364 { | |
| 365 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 366 | |
| 367 tp->declareParameter(paramscope); | |
| 368 } | |
| 369 | |
| 370 for (int i = 0; i < parameters->dim; i++) | |
| 371 { | |
| 372 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 373 | |
| 374 tp->semantic(paramscope); | |
| 375 if (i + 1 != parameters->dim && tp->isTemplateTupleParameter()) | |
| 376 error("template tuple parameter must be last one"); | |
| 377 } | |
| 378 | |
| 379 paramscope->pop(); | |
| 380 | |
| 381 if (members) | |
| 382 { | |
| 383 Dsymbol *s; | |
| 384 if (Dsymbol::oneMembers(members, &s)) | |
| 385 { | |
| 386 if (s && s->ident && s->ident->equals(ident)) | |
| 387 { | |
| 388 onemember = s; | |
| 389 s->parent = this; | |
| 390 } | |
| 391 } | |
| 392 } | |
| 393 | |
| 394 /* BUG: should check: | |
| 395 * o no virtual functions or non-static data members of classes | |
| 396 */ | |
| 397 } | |
| 398 | |
| 399 const char *TemplateDeclaration::kind() | |
| 400 { | |
| 401 return (onemember && onemember->isAggregateDeclaration()) | |
| 402 ? onemember->kind() | |
| 403 : (char *)"template"; | |
| 404 } | |
| 405 | |
| 406 /********************************** | |
| 407 * Overload existing TemplateDeclaration 'this' with the new one 's'. | |
| 408 * Return !=0 if successful; i.e. no conflict. | |
| 409 */ | |
| 410 | |
| 411 int TemplateDeclaration::overloadInsert(Dsymbol *s) | |
| 412 { | |
| 413 TemplateDeclaration **pf; | |
| 414 TemplateDeclaration *f; | |
| 415 | |
| 416 #if LOG | |
| 417 printf("TemplateDeclaration::overloadInsert('%s')\n", s->toChars()); | |
| 418 #endif | |
| 419 f = s->isTemplateDeclaration(); | |
| 420 if (!f) | |
| 421 return FALSE; | |
| 422 TemplateDeclaration *pthis = this; | |
| 423 for (pf = &pthis; *pf; pf = &(*pf)->overnext) | |
| 424 { | |
| 425 #if 0 | |
| 426 // Conflict if TemplateParameter's match | |
| 427 // Will get caught anyway later with TemplateInstance, but | |
| 428 // should check it now. | |
| 429 TemplateDeclaration *f2 = *pf; | |
| 430 | |
| 431 if (f->parameters->dim != f2->parameters->dim) | |
| 432 goto Lcontinue; | |
| 433 | |
| 434 for (int i = 0; i < f->parameters->dim; i++) | |
| 435 { TemplateParameter *p1 = (TemplateParameter *)f->parameters->data[i]; | |
| 436 TemplateParameter *p2 = (TemplateParameter *)f2->parameters->data[i]; | |
| 437 | |
| 438 if (!p1->overloadMatch(p2)) | |
| 439 goto Lcontinue; | |
| 440 } | |
| 441 | |
| 442 #if LOG | |
| 443 printf("\tfalse: conflict\n"); | |
| 444 #endif | |
| 445 return FALSE; | |
| 446 | |
| 447 Lcontinue: | |
| 448 ; | |
| 449 #endif | |
| 450 } | |
| 451 | |
| 452 f->overroot = this; | |
| 453 *pf = f; | |
| 454 #if LOG | |
| 455 printf("\ttrue: no conflict\n"); | |
| 456 #endif | |
| 457 return TRUE; | |
| 458 } | |
| 459 | |
| 460 /*************************************** | |
| 461 * Given that ti is an instance of this TemplateDeclaration, | |
| 462 * deduce the types of the parameters to this, and store | |
| 463 * those deduced types in dedtypes[]. | |
| 464 * Input: | |
| 465 * flag 1: don't do semantic() because of dummy types | |
| 466 * 2: don't change types in matchArg() | |
| 467 * Output: | |
| 468 * dedtypes deduced arguments | |
| 469 * Return match level. | |
| 470 */ | |
| 471 | |
| 472 MATCH TemplateDeclaration::matchWithInstance(TemplateInstance *ti, | |
| 473 Objects *dedtypes, int flag) | |
| 474 { MATCH m; | |
| 475 int dedtypes_dim = dedtypes->dim; | |
| 476 | |
| 477 #define LOGM 0 | |
| 478 #if LOGM | |
| 479 printf("\n+TemplateDeclaration::matchWithInstance(this = %s, ti = %s, flag = %d)\n", toChars(), ti->toChars(), flag); | |
| 480 #endif | |
| 481 | |
| 482 #if 0 | |
| 483 printf("dedtypes->dim = %d, parameters->dim = %d\n", dedtypes_dim, parameters->dim); | |
| 484 if (ti->tiargs->dim) | |
| 485 printf("ti->tiargs->dim = %d, [0] = %p\n", | |
| 486 ti->tiargs->dim, | |
| 487 ti->tiargs->data[0]); | |
| 488 #endif | |
| 489 dedtypes->zero(); | |
| 490 | |
| 491 int parameters_dim = parameters->dim; | |
| 492 int variadic = isVariadic() != NULL; | |
| 493 | |
| 494 // If more arguments than parameters, no match | |
| 495 if (ti->tiargs->dim > parameters_dim && !variadic) | |
| 496 { | |
| 497 #if LOGM | |
| 498 printf(" no match: more arguments than parameters\n"); | |
| 499 #endif | |
| 500 return MATCHnomatch; | |
| 501 } | |
| 502 | |
| 503 assert(dedtypes_dim == parameters_dim); | |
| 504 assert(dedtypes_dim >= ti->tiargs->dim || variadic); | |
| 505 | |
| 506 // Set up scope for parameters | |
| 507 assert((size_t)scope > 0x10000); | |
| 508 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
| 509 paramsym->parent = scope->parent; | |
| 510 Scope *paramscope = scope->push(paramsym); | |
| 511 | |
| 512 // Attempt type deduction | |
| 513 m = MATCHexact; | |
| 514 for (int i = 0; i < dedtypes_dim; i++) | |
| 515 { MATCH m2; | |
| 516 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 517 Declaration *sparam; | |
| 518 | |
| 519 //printf("\targument [%d]\n", i); | |
| 520 #if LOGM | |
| 521 //printf("\targument [%d] is %s\n", i, oarg ? oarg->toChars() : "null"); | |
| 522 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
| 523 if (ttp) | |
| 524 printf("\tparameter[%d] is %s : %s\n", i, tp->ident->toChars(), ttp->specType ? ttp->specType->toChars() : ""); | |
| 525 #endif | |
| 526 | |
| 527 #if DMDV1 | |
| 528 m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam); | |
| 529 #else | |
| 530 m2 = tp->matchArg(paramscope, ti->tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 531 | |
| 532 #endif | |
| 533 //printf("\tm2 = %d\n", m2); | |
| 534 | |
| 535 if (m2 == MATCHnomatch) | |
| 536 { | |
| 537 #if 0 | |
| 538 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 539 #endif | |
| 540 goto Lnomatch; | |
| 541 } | |
| 542 | |
| 543 if (m2 < m) | |
| 544 m = m2; | |
| 545 | |
| 546 if (!flag) | |
| 547 sparam->semantic(paramscope); | |
| 548 if (!paramscope->insert(sparam)) | |
| 549 goto Lnomatch; | |
| 550 } | |
| 551 | |
| 552 if (!flag) | |
| 553 { | |
| 554 // Any parameter left without a type gets the type of its corresponding arg | |
| 555 for (int i = 0; i < dedtypes_dim; i++) | |
| 556 { | |
| 557 if (!dedtypes->data[i]) | |
| 558 { assert(i < ti->tiargs->dim); | |
| 559 dedtypes->data[i] = ti->tiargs->data[i]; | |
| 560 } | |
| 561 } | |
| 562 } | |
| 563 | |
| 564 #if LOGM | |
| 565 // Print out the results | |
| 566 printf("--------------------------\n"); | |
| 567 printf("template %s\n", toChars()); | |
| 568 printf("instance %s\n", ti->toChars()); | |
| 569 if (m) | |
| 570 { | |
| 571 for (int i = 0; i < dedtypes_dim; i++) | |
| 572 { | |
| 573 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 574 Object *oarg; | |
| 575 | |
| 576 printf(" [%d]", i); | |
| 577 | |
| 578 if (i < ti->tiargs->dim) | |
| 579 oarg = (Object *)ti->tiargs->data[i]; | |
| 580 else | |
| 581 oarg = NULL; | |
| 582 tp->print(oarg, (Object *)dedtypes->data[i]); | |
| 583 } | |
| 584 } | |
| 585 else | |
| 586 goto Lnomatch; | |
| 587 #endif | |
| 588 | |
| 589 #if LOGM | |
| 590 printf(" match = %d\n", m); | |
| 591 #endif | |
| 592 goto Lret; | |
| 593 | |
| 594 Lnomatch: | |
| 595 #if LOGM | |
| 596 printf(" no match\n"); | |
| 597 #endif | |
| 598 m = MATCHnomatch; | |
| 599 | |
| 600 Lret: | |
| 601 paramscope->pop(); | |
| 602 #if LOGM | |
| 603 printf("-TemplateDeclaration::matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 604 #endif | |
| 605 return m; | |
| 606 } | |
| 607 | |
| 608 /******************************************** | |
| 609 * Determine partial specialization order of 'this' vs td2. | |
| 610 * Returns: | |
| 611 * 1 this is at least as specialized as td2 | |
| 612 * 0 td2 is more specialized than this | |
| 613 */ | |
| 614 | |
| 615 int TemplateDeclaration::leastAsSpecialized(TemplateDeclaration *td2) | |
| 616 { | |
| 617 /* This works by taking the template parameters to this template | |
| 618 * declaration and feeding them to td2 as if it were a template | |
| 619 * instance. | |
| 620 * If it works, then this template is at least as specialized | |
| 621 * as td2. | |
| 622 */ | |
| 623 | |
| 624 TemplateInstance ti(0, ident); // create dummy template instance | |
| 625 Objects dedtypes; | |
| 626 | |
| 627 #define LOG_LEASTAS 0 | |
| 628 | |
| 629 #if LOG_LEASTAS | |
| 630 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2->toChars()); | |
| 631 #endif | |
| 632 | |
| 633 // Set type arguments to dummy template instance to be types | |
| 634 // generated from the parameters to this template declaration | |
| 635 ti.tiargs = new Objects(); | |
| 636 ti.tiargs->setDim(parameters->dim); | |
| 637 for (int i = 0; i < ti.tiargs->dim; i++) | |
| 638 { | |
| 639 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 640 | |
| 641 void *p = tp->dummyArg(); | |
| 642 if (p) | |
| 643 ti.tiargs->data[i] = p; | |
| 644 else | |
| 645 ti.tiargs->setDim(i); | |
| 646 } | |
| 647 | |
| 648 // Temporary Array to hold deduced types | |
| 649 //dedtypes.setDim(parameters->dim); | |
| 650 dedtypes.setDim(td2->parameters->dim); | |
| 651 | |
| 652 // Attempt a type deduction | |
| 653 if (td2->matchWithInstance(&ti, &dedtypes, 1)) | |
| 654 { | |
| 655 /* A non-variadic template is more specialized than a | |
| 656 * variadic one. | |
| 657 */ | |
| 658 if (isVariadic() && !td2->isVariadic()) | |
| 659 goto L1; | |
| 660 | |
| 661 #if LOG_LEASTAS | |
| 662 printf(" matches, so is least as specialized\n"); | |
| 663 #endif | |
| 664 return 1; | |
| 665 } | |
| 666 L1: | |
| 667 #if LOG_LEASTAS | |
| 668 printf(" doesn't match, so is not as specialized\n"); | |
| 669 #endif | |
| 670 return 0; | |
| 671 } | |
| 672 | |
| 673 | |
| 674 /************************************************* | |
| 675 * Match function arguments against a specific template function. | |
| 676 * Input: | |
| 677 * targsi Expression/Type initial list of template arguments | |
| 678 * fargs arguments to function | |
| 679 * Output: | |
| 680 * dedargs Expression/Type deduced template arguments | |
| 681 * Returns: | |
| 682 * match level | |
| 683 */ | |
| 684 | |
| 685 MATCH TemplateDeclaration::deduceFunctionTemplateMatch(Objects *targsi, Expressions *fargs, | |
| 686 Objects *dedargs) | |
| 687 { | |
| 688 size_t i; | |
| 689 size_t nfparams; | |
| 690 size_t nfargs; | |
| 691 size_t nargsi; // array size of targsi | |
| 692 int fptupindex = -1; | |
| 693 int tuple_dim = 0; | |
| 694 MATCH match = MATCHexact; | |
| 695 FuncDeclaration *fd = onemember->toAlias()->isFuncDeclaration(); | |
| 696 TypeFunction *fdtype; // type of fd | |
| 697 TemplateTupleParameter *tp; | |
| 698 Objects dedtypes; // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 699 | |
| 700 #if 0 | |
| 701 printf("\nTemplateDeclaration::deduceFunctionTemplateMatch() %s\n", toChars()); | |
| 702 for (i = 0; i < fargs->dim; i++) | |
| 703 { Expression *e = (Expression *)fargs->data[i]; | |
| 704 printf("\tfarg[%d] is %s, type is %s\n", i, e->toChars(), e->type->toChars()); | |
| 705 } | |
| 706 #endif | |
| 707 | |
| 708 assert((size_t)scope > 0x10000); | |
| 709 | |
| 710 dedargs->setDim(parameters->dim); | |
| 711 dedargs->zero(); | |
| 712 | |
| 713 dedtypes.setDim(parameters->dim); | |
| 714 dedtypes.zero(); | |
| 715 | |
| 716 // Set up scope for parameters | |
| 717 ScopeDsymbol *paramsym = new ScopeDsymbol(); | |
| 718 paramsym->parent = scope->parent; | |
| 719 Scope *paramscope = scope->push(paramsym); | |
| 720 | |
| 721 tp = isVariadic(); | |
| 722 | |
| 723 nargsi = 0; | |
| 724 if (targsi) | |
| 725 { // Set initial template arguments | |
| 726 | |
| 727 nargsi = targsi->dim; | |
| 728 if (nargsi > parameters->dim) | |
| 729 { if (!tp) | |
| 730 goto Lnomatch; | |
| 731 dedargs->setDim(nargsi); | |
| 732 dedargs->zero(); | |
| 733 } | |
| 734 | |
| 735 memcpy(dedargs->data, targsi->data, nargsi * sizeof(*dedargs->data)); | |
| 736 | |
| 737 for (i = 0; i < nargsi; i++) | |
| 738 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 739 MATCH m; | |
| 740 Declaration *sparam; | |
| 741 | |
| 742 m = tp->matchArg(paramscope, dedargs, i, parameters, &dedtypes, &sparam); | |
| 743 //printf("\tdeduceType m = %d\n", m); | |
| 744 if (m == MATCHnomatch) | |
| 745 goto Lnomatch; | |
| 746 if (m < match) | |
| 747 match = m; | |
| 748 | |
| 749 sparam->semantic(paramscope); | |
| 750 if (!paramscope->insert(sparam)) | |
| 751 goto Lnomatch; | |
| 752 } | |
| 753 } | |
| 754 | |
| 755 assert(fd->type->ty == Tfunction); | |
| 756 fdtype = (TypeFunction *)fd->type; | |
| 757 | |
| 758 nfparams = Argument::dim(fdtype->parameters); // number of function parameters | |
| 759 nfargs = fargs->dim; // number of function arguments | |
| 760 | |
| 761 /* Check for match of function arguments with variadic template | |
| 762 * parameter, such as: | |
| 763 * | |
| 764 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 765 * void main() { Foo(1,2,3); } | |
| 766 */ | |
| 767 tp = isVariadic(); | |
| 768 if (tp) // if variadic | |
| 769 { | |
| 770 if (nfparams == 0) // if no function parameters | |
| 771 { | |
| 772 Tuple *t = new Tuple(); | |
| 773 //printf("t = %p\n", t); | |
| 774 dedargs->data[parameters->dim - 1] = (void *)t; | |
| 775 goto L2; | |
| 776 } | |
| 777 else if (nfargs < nfparams - 1) | |
| 778 goto L1; | |
| 779 else | |
| 780 { | |
| 781 /* Figure out which of the function parameters matches | |
| 782 * the tuple template parameter. Do this by matching | |
| 783 * type identifiers. | |
| 784 * Set the index of this function parameter to fptupindex. | |
| 785 */ | |
| 786 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 787 { | |
| 788 Argument *fparam = (Argument *)fdtype->parameters->data[fptupindex]; | |
| 789 if (fparam->type->ty != Tident) | |
| 790 continue; | |
| 791 TypeIdentifier *tid = (TypeIdentifier *)fparam->type; | |
| 792 if (!tp->ident->equals(tid->ident) || tid->idents.dim) | |
| 793 continue; | |
| 794 | |
| 795 if (fdtype->varargs) // variadic function doesn't | |
| 796 goto Lnomatch; // go with variadic template | |
| 797 | |
| 798 /* The types of the function arguments | |
| 799 * now form the tuple argument. | |
| 800 */ | |
| 801 Tuple *t = new Tuple(); | |
| 802 dedargs->data[parameters->dim - 1] = (void *)t; | |
| 803 | |
| 804 tuple_dim = nfargs - (nfparams - 1); | |
| 805 t->objects.setDim(tuple_dim); | |
| 806 for (i = 0; i < tuple_dim; i++) | |
| 807 { Expression *farg = (Expression *)fargs->data[fptupindex + i]; | |
| 808 t->objects.data[i] = (void *)farg->type; | |
| 809 } | |
| 810 goto L2; | |
| 811 } | |
| 812 fptupindex = -1; | |
| 813 } | |
| 814 } | |
| 815 | |
| 816 L1: | |
| 817 if (nfparams == nfargs) | |
| 818 ; | |
| 819 else if (nfargs > nfparams) | |
| 820 { | |
| 821 if (fdtype->varargs == 0) | |
| 822 goto Lnomatch; // too many args, no match | |
| 823 match = MATCHconvert; // match ... with a conversion | |
| 824 } | |
| 825 | |
| 826 L2: | |
| 827 // Loop through the function parameters | |
| 828 for (i = 0; i < nfparams; i++) | |
| 829 { | |
| 830 /* Skip over function parameters which wound up | |
| 831 * as part of a template tuple parameter. | |
| 832 */ | |
| 833 if (i == fptupindex) | |
| 834 { if (fptupindex == nfparams - 1) | |
| 835 break; | |
| 836 i += tuple_dim - 1; | |
| 837 continue; | |
| 838 } | |
| 839 | |
| 840 Argument *fparam = Argument::getNth(fdtype->parameters, i); | |
| 841 | |
| 842 if (i >= nfargs) // if not enough arguments | |
| 843 { | |
| 844 if (fparam->defaultArg) | |
| 845 { /* Default arguments do not participate in template argument | |
| 846 * deduction. | |
| 847 */ | |
| 848 goto Lmatch; | |
| 849 } | |
| 850 } | |
| 851 else | |
| 852 { Expression *farg = (Expression *)fargs->data[i]; | |
| 853 #if 0 | |
| 854 printf("\tfarg->type = %s\n", farg->type->toChars()); | |
| 855 printf("\tfparam->type = %s\n", fparam->type->toChars()); | |
| 856 #endif | |
| 857 | |
| 858 MATCH m; | |
| 859 m = farg->type->deduceType(scope, fparam->type, parameters, &dedtypes); | |
| 860 //printf("\tdeduceType m = %d\n", m); | |
| 861 | |
| 862 /* If no match, see if there's a conversion to a delegate | |
| 863 */ | |
| 864 if (!m && fparam->type->toBasetype()->ty == Tdelegate) | |
| 865 { | |
| 866 TypeDelegate *td = (TypeDelegate *)fparam->type->toBasetype(); | |
| 867 TypeFunction *tf = (TypeFunction *)td->next; | |
| 868 | |
| 869 if (!tf->varargs && Argument::dim(tf->parameters) == 0) | |
| 870 { | |
| 871 m = farg->type->deduceType(scope, tf->next, parameters, &dedtypes); | |
| 872 if (!m && tf->next->toBasetype()->ty == Tvoid) | |
| 873 m = MATCHconvert; | |
| 874 } | |
| 875 //printf("\tm2 = %d\n", m); | |
| 876 } | |
| 877 | |
| 878 if (m) | |
| 879 { if (m < match) | |
| 880 match = m; // pick worst match | |
| 881 continue; | |
| 882 } | |
| 883 } | |
| 884 | |
| 885 /* The following code for variadic arguments closely | |
| 886 * matches TypeFunction::callMatch() | |
| 887 */ | |
| 888 if (!(fdtype->varargs == 2 && i + 1 == nfparams)) | |
| 889 goto Lnomatch; | |
| 890 | |
| 891 /* Check for match with function parameter T... | |
| 892 */ | |
| 893 Type *tb = fparam->type->toBasetype(); | |
| 894 switch (tb->ty) | |
| 895 { | |
| 896 // Perhaps we can do better with this, see TypeFunction::callMatch() | |
| 897 case Tsarray: | |
| 898 { TypeSArray *tsa = (TypeSArray *)tb; | |
| 899 integer_t sz = tsa->dim->toInteger(); | |
| 900 if (sz != nfargs - i) | |
| 901 goto Lnomatch; | |
| 902 } | |
| 903 case Tarray: | |
| 904 { TypeArray *ta = (TypeArray *)tb; | |
| 905 for (; i < nfargs; i++) | |
| 906 { | |
| 907 Expression *arg = (Expression *)fargs->data[i]; | |
| 908 assert(arg); | |
| 909 MATCH m; | |
| 910 /* If lazy array of delegates, | |
| 911 * convert arg(s) to delegate(s) | |
| 912 */ | |
| 913 Type *tret = fparam->isLazyArray(); | |
| 914 if (tret) | |
| 915 { | |
| 916 if (ta->next->equals(arg->type)) | |
| 917 { m = MATCHexact; | |
| 918 } | |
| 919 else | |
| 920 { | |
| 921 m = arg->implicitConvTo(tret); | |
| 922 if (m == MATCHnomatch) | |
| 923 { | |
| 924 if (tret->toBasetype()->ty == Tvoid) | |
| 925 m = MATCHconvert; | |
| 926 } | |
| 927 } | |
| 928 } | |
| 929 else | |
| 930 { | |
| 931 m = arg->type->deduceType(scope, ta->next, parameters, &dedtypes); | |
| 932 //m = arg->implicitConvTo(ta->next); | |
| 933 } | |
| 934 if (m == MATCHnomatch) | |
| 935 goto Lnomatch; | |
| 936 if (m < match) | |
| 937 match = m; | |
| 938 } | |
| 939 goto Lmatch; | |
| 940 } | |
| 941 case Tclass: | |
| 942 case Tident: | |
| 943 goto Lmatch; | |
| 944 | |
| 945 default: | |
| 946 goto Lnomatch; | |
| 947 } | |
| 948 } | |
| 949 | |
| 950 Lmatch: | |
| 951 | |
| 952 /* Fill in any missing arguments with their defaults. | |
| 953 */ | |
| 954 for (i = nargsi; i < dedargs->dim; i++) | |
| 955 { | |
| 956 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 957 //printf("tp[%d] = %s\n", i, tp->ident->toChars()); | |
| 958 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 959 * But for function templates, we really need them to match | |
| 960 */ | |
| 961 Object *oarg = (Object *)dedargs->data[i]; | |
| 962 Object *oded = (Object *)dedtypes.data[i]; | |
| 963 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); | |
| 964 if (!oarg) | |
| 965 { | |
| 966 if (oded) | |
| 967 { | |
| 968 if (tp->specialization()) | |
| 969 { /* The specialization can work as long as afterwards | |
| 970 * the oded == oarg | |
| 971 */ | |
| 972 Declaration *sparam; | |
| 973 dedargs->data[i] = (void *)oded; | |
| 974 MATCH m2 = tp->matchArg(paramscope, dedargs, i, parameters, &dedtypes, &sparam); | |
| 975 //printf("m2 = %d\n", m2); | |
| 976 if (!m2) | |
| 977 goto Lnomatch; | |
| 978 if (m2 < match) | |
| 979 match = m2; // pick worst match | |
| 980 if (dedtypes.data[i] != oded) | |
| 981 error("specialization not allowed for deduced parameter %s", tp->ident->toChars()); | |
| 982 } | |
| 983 } | |
| 984 else | |
| 985 { oded = tp->defaultArg(paramscope); | |
| 986 if (!oded) | |
| 987 goto Lnomatch; | |
| 988 } | |
| 989 declareParameter(paramscope, tp, oded); | |
| 990 dedargs->data[i] = (void *)oded; | |
| 991 } | |
| 992 } | |
| 993 | |
| 994 #if 0 | |
| 995 for (i = 0; i < dedargs->dim; i++) | |
| 996 { Type *t = (Type *)dedargs->data[i]; | |
| 997 printf("\tdedargs[%d] = %d, %s\n", i, t->dyncast(), t->toChars()); | |
| 998 } | |
| 999 #endif | |
| 1000 | |
| 1001 paramscope->pop(); | |
| 1002 //printf("\tmatch %d\n", match); | |
| 1003 return match; | |
| 1004 | |
| 1005 Lnomatch: | |
| 1006 paramscope->pop(); | |
| 1007 //printf("\tnomatch\n"); | |
| 1008 return MATCHnomatch; | |
| 1009 } | |
| 1010 | |
| 1011 /************************************************** | |
| 1012 * Declare template parameter tp with value o. | |
| 1013 */ | |
| 1014 | |
| 1015 void TemplateDeclaration::declareParameter(Scope *sc, TemplateParameter *tp, Object *o) | |
| 1016 { | |
| 1017 //printf("TemplateDeclaration::declareParameter('%s', o = %p)\n", tp->ident->toChars(), o); | |
| 1018 | |
| 1019 Type *targ = isType(o); | |
| 1020 Expression *ea = isExpression(o); | |
| 1021 Dsymbol *sa = isDsymbol(o); | |
| 1022 Tuple *va = isTuple(o); | |
| 1023 | |
| 1024 Dsymbol *s; | |
| 1025 | |
| 1026 if (targ) | |
| 1027 { | |
| 1028 //printf("type %s\n", targ->toChars()); | |
| 1029 s = new AliasDeclaration(0, tp->ident, targ); | |
| 1030 } | |
| 1031 else if (sa) | |
| 1032 { | |
| 1033 //printf("Alias %s %s;\n", sa->ident->toChars(), tp->ident->toChars()); | |
| 1034 s = new AliasDeclaration(0, tp->ident, sa); | |
| 1035 } | |
| 1036 else if (ea) | |
| 1037 { | |
| 1038 // tdtypes.data[i] always matches ea here | |
| 1039 Initializer *init = new ExpInitializer(loc, ea); | |
| 1040 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 1041 assert(tvp); | |
| 1042 | |
| 1043 VarDeclaration *v = new VarDeclaration(loc, tvp->valType, tp->ident, init); | |
| 1044 v->storage_class = STCconst; | |
| 1045 s = v; | |
| 1046 } | |
| 1047 else if (va) | |
| 1048 { | |
| 1049 //printf("\ttuple\n"); | |
| 1050 s = new TupleDeclaration(loc, tp->ident, &va->objects); | |
| 1051 } | |
| 1052 else | |
| 1053 { | |
| 1054 #ifdef DEBUG | |
| 1055 o->print(); | |
| 1056 #endif | |
| 1057 assert(0); | |
| 1058 } | |
| 1059 if (!sc->insert(s)) | |
| 1060 error("declaration %s is already defined", tp->ident->toChars()); | |
| 1061 s->semantic(sc); | |
| 1062 } | |
| 1063 | |
| 1064 /************************************** | |
| 1065 * Determine if TemplateDeclaration is variadic. | |
| 1066 */ | |
| 1067 | |
| 1068 TemplateTupleParameter *isVariadic(TemplateParameters *parameters) | |
| 1069 { size_t dim = parameters->dim; | |
| 1070 TemplateTupleParameter *tp = NULL; | |
| 1071 | |
| 1072 if (dim) | |
| 1073 tp = ((TemplateParameter *)parameters->data[dim - 1])->isTemplateTupleParameter(); | |
| 1074 return tp; | |
| 1075 } | |
| 1076 | |
| 1077 TemplateTupleParameter *TemplateDeclaration::isVariadic() | |
| 1078 { | |
| 1079 return ::isVariadic(parameters); | |
| 1080 } | |
| 1081 | |
| 1082 /*********************************** | |
| 1083 * We can overload templates. | |
| 1084 */ | |
| 1085 | |
| 1086 int TemplateDeclaration::isOverloadable() | |
| 1087 { | |
| 1088 return 1; | |
| 1089 } | |
| 1090 | |
| 1091 /************************************************* | |
| 1092 * Given function arguments, figure out which template function | |
| 1093 * to expand, and return that function. | |
| 1094 * If no match, give error message and return NULL. | |
| 1095 * Input: | |
| 1096 * sc instantiation scope | |
| 1097 * loc instantiation location | |
| 1098 * targsi initial list of template arguments | |
| 1099 * fargs arguments to function | |
| 1100 */ | |
| 1101 | |
| 1102 FuncDeclaration *TemplateDeclaration::deduceFunctionTemplate(Scope *sc, Loc loc, | |
| 1103 Objects *targsi, Expressions *fargs) | |
| 1104 { | |
| 1105 MATCH m_best = MATCHnomatch; | |
| 1106 TemplateDeclaration *td_ambig = NULL; | |
| 1107 TemplateDeclaration *td_best = NULL; | |
| 1108 Objects *tdargs = new Objects(); | |
| 1109 TemplateInstance *ti; | |
| 1110 FuncDeclaration *fd; | |
| 1111 | |
| 1112 #if 0 | |
| 1113 printf("TemplateDeclaration::deduceFunctionTemplate() %s\n", toChars()); | |
| 1114 printf(" targsi:\n"); | |
| 1115 if (targsi) | |
| 1116 { for (int i = 0; i < targsi->dim; i++) | |
| 1117 { Object *arg = (Object *)targsi->data[i]; | |
| 1118 printf("\t%s\n", arg->toChars()); | |
| 1119 } | |
| 1120 } | |
| 1121 printf(" fargs:\n"); | |
| 1122 for (int i = 0; i < fargs->dim; i++) | |
| 1123 { Expression *arg = (Expression *)fargs->data[i]; | |
| 1124 printf("\t%s %s\n", arg->type->toChars(), arg->toChars()); | |
| 1125 //printf("\tty = %d\n", arg->type->ty); | |
| 1126 } | |
| 1127 #endif | |
| 1128 | |
| 1129 for (TemplateDeclaration *td = this; td; td = td->overnext) | |
| 1130 { | |
| 1131 if (!td->scope) | |
| 1132 { | |
| 1133 error("forward reference to template %s", td->toChars()); | |
| 1134 goto Lerror; | |
| 1135 } | |
| 1136 if (!td->onemember || !td->onemember->toAlias()->isFuncDeclaration()) | |
| 1137 { | |
| 1138 error("is not a function template"); | |
| 1139 goto Lerror; | |
| 1140 } | |
| 1141 | |
| 1142 MATCH m; | |
| 1143 Objects dedargs; | |
| 1144 | |
| 1145 m = td->deduceFunctionTemplateMatch(targsi, fargs, &dedargs); | |
| 1146 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1147 if (!m) // if no match | |
| 1148 continue; | |
| 1149 | |
| 1150 if (m < m_best) | |
| 1151 goto Ltd_best; | |
| 1152 if (m > m_best) | |
| 1153 goto Ltd; | |
| 1154 | |
| 1155 { | |
| 1156 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1157 int c1 = td->leastAsSpecialized(td_best); | |
| 1158 int c2 = td_best->leastAsSpecialized(td); | |
| 1159 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1160 | |
| 1161 if (c1 > c2) | |
| 1162 goto Ltd; | |
| 1163 else if (c1 < c2) | |
| 1164 goto Ltd_best; | |
| 1165 else | |
| 1166 goto Lambig; | |
| 1167 } | |
| 1168 | |
| 1169 Lambig: // td_best and td are ambiguous | |
| 1170 td_ambig = td; | |
| 1171 continue; | |
| 1172 | |
| 1173 Ltd_best: // td_best is the best match so far | |
| 1174 td_ambig = NULL; | |
| 1175 continue; | |
| 1176 | |
| 1177 Ltd: // td is the new best match | |
| 1178 td_ambig = NULL; | |
| 1179 assert((size_t)td->scope > 0x10000); | |
| 1180 td_best = td; | |
| 1181 m_best = m; | |
| 1182 tdargs->setDim(dedargs.dim); | |
| 1183 memcpy(tdargs->data, dedargs.data, tdargs->dim * sizeof(void *)); | |
| 1184 continue; | |
| 1185 } | |
| 1186 if (!td_best) | |
| 1187 { | |
| 1188 error(loc, "does not match any template declaration"); | |
| 1189 goto Lerror; | |
| 1190 } | |
| 1191 if (td_ambig) | |
| 1192 { | |
| 1193 error(loc, "%s matches more than one function template declaration, %s and %s", | |
| 1194 toChars(), td_best->toChars(), td_ambig->toChars()); | |
| 1195 } | |
| 1196 | |
| 1197 /* The best match is td_best with arguments tdargs. | |
| 1198 * Now instantiate the template. | |
| 1199 */ | |
| 1200 assert((size_t)td_best->scope > 0x10000); | |
| 1201 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1202 ti->semantic(sc); | |
| 1203 fd = ti->toAlias()->isFuncDeclaration(); | |
| 1204 if (!fd) | |
| 1205 goto Lerror; | |
| 1206 return fd; | |
| 1207 | |
| 1208 Lerror: | |
| 1209 { | |
| 1210 OutBuffer buf; | |
| 1211 HdrGenState hgs; | |
| 1212 | |
| 1213 argExpTypesToCBuffer(&buf, fargs, &hgs); | |
| 1214 error(loc, "cannot deduce template function from argument types (%s)", | |
| 1215 buf.toChars()); | |
| 1216 return NULL; | |
| 1217 } | |
| 1218 } | |
| 1219 | |
| 1220 void TemplateDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1221 { | |
| 1222 #if 0 // Should handle template functions | |
| 1223 if (onemember && onemember->isFuncDeclaration()) | |
| 1224 buf->writestring("foo "); | |
| 1225 #endif | |
| 1226 buf->writestring(kind()); | |
| 1227 buf->writeByte(' '); | |
| 1228 buf->writestring(ident->toChars()); | |
| 1229 buf->writeByte('('); | |
| 1230 for (int i = 0; i < parameters->dim; i++) | |
| 1231 { | |
| 1232 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1233 if (hgs->ddoc) | |
| 1234 tp = (TemplateParameter *)origParameters->data[i]; | |
| 1235 if (i) | |
| 1236 buf->writeByte(','); | |
| 1237 tp->toCBuffer(buf, hgs); | |
| 1238 } | |
| 1239 buf->writeByte(')'); | |
| 1240 | |
| 1241 if (hgs->hdrgen) | |
| 1242 { | |
| 1243 hgs->tpltMember++; | |
| 1244 buf->writenl(); | |
| 1245 buf->writebyte('{'); | |
| 1246 buf->writenl(); | |
| 1247 for (int i = 0; i < members->dim; i++) | |
| 1248 { | |
| 1249 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 1250 s->toCBuffer(buf, hgs); | |
| 1251 } | |
| 1252 buf->writebyte('}'); | |
| 1253 buf->writenl(); | |
| 1254 hgs->tpltMember--; | |
| 1255 } | |
| 1256 } | |
| 1257 | |
| 1258 | |
| 1259 char *TemplateDeclaration::toChars() | |
| 1260 { OutBuffer buf; | |
| 1261 HdrGenState hgs; | |
| 1262 | |
| 1263 memset(&hgs, 0, sizeof(hgs)); | |
| 1264 buf.writestring(ident->toChars()); | |
| 1265 buf.writeByte('('); | |
| 1266 for (int i = 0; i < parameters->dim; i++) | |
| 1267 { | |
| 1268 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1269 if (i) | |
| 1270 buf.writeByte(','); | |
| 1271 tp->toCBuffer(&buf, &hgs); | |
| 1272 } | |
| 1273 buf.writeByte(')'); | |
| 1274 buf.writeByte(0); | |
| 1275 return (char *)buf.extractData(); | |
| 1276 } | |
| 1277 | |
| 1278 /* ======================== Type ============================================ */ | |
| 1279 | |
| 1280 /**** | |
| 1281 * Given an identifier, figure out which TemplateParameter it is. | |
| 1282 * Return -1 if not found. | |
| 1283 */ | |
| 1284 | |
| 1285 int templateIdentifierLookup(Identifier *id, TemplateParameters *parameters) | |
| 1286 { | |
| 1287 for (size_t i = 0; i < parameters->dim; i++) | |
| 1288 { TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1289 | |
| 1290 if (tp->ident->equals(id)) | |
| 1291 return i; | |
| 1292 } | |
| 1293 return -1; | |
| 1294 } | |
| 1295 | |
| 1296 int templateParameterLookup(Type *tparam, TemplateParameters *parameters) | |
| 1297 { | |
| 1298 assert(tparam->ty == Tident); | |
| 1299 TypeIdentifier *tident = (TypeIdentifier *)tparam; | |
| 1300 //printf("\ttident = '%s'\n", tident->toChars()); | |
| 1301 if (tident->idents.dim == 0) | |
| 1302 { | |
| 1303 return templateIdentifierLookup(tident->ident, parameters); | |
| 1304 } | |
| 1305 return -1; | |
| 1306 } | |
| 1307 | |
| 1308 /* These form the heart of template argument deduction. | |
| 1309 * Given 'this' being the type argument to the template instance, | |
| 1310 * it is matched against the template declaration parameter specialization | |
| 1311 * 'tparam' to determine the type to be used for the parameter. | |
| 1312 * Example: | |
| 1313 * template Foo(T:T*) // template declaration | |
| 1314 * Foo!(int*) // template instantiation | |
| 1315 * Input: | |
| 1316 * this = int* | |
| 1317 * tparam = T | |
| 1318 * parameters = [ T:T* ] // Array of TemplateParameter's | |
| 1319 * Output: | |
| 1320 * dedtypes = [ int ] // Array of Expression/Type's | |
| 1321 */ | |
| 1322 | |
| 1323 MATCH Type::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, | |
| 1324 Objects *dedtypes) | |
| 1325 { | |
| 1326 //printf("Type::deduceType()\n"); | |
| 1327 //printf("\tthis = %d, ", ty); print(); | |
| 1328 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1329 if (!tparam) | |
| 1330 goto Lnomatch; | |
| 1331 | |
| 1332 if (this == tparam) | |
| 1333 goto Lexact; | |
| 1334 | |
| 1335 if (tparam->ty == Tident) | |
| 1336 { | |
| 1337 // Determine which parameter tparam is | |
| 1338 int i = templateParameterLookup(tparam, parameters); | |
| 1339 if (i == -1) | |
| 1340 { | |
| 1341 if (!sc) | |
| 1342 goto Lnomatch; | |
| 1343 | |
| 1344 /* Need a loc to go with the semantic routine. | |
| 1345 */ | |
| 1346 Loc loc; | |
| 1347 if (parameters->dim) | |
| 1348 { | |
| 1349 TemplateParameter *tp = (TemplateParameter *)parameters->data[0]; | |
| 1350 loc = tp->loc; | |
| 1351 } | |
| 1352 | |
| 1353 /* BUG: what if tparam is a template instance, that | |
| 1354 * has as an argument another Tident? | |
| 1355 */ | |
| 1356 tparam = tparam->semantic(loc, sc); | |
| 1357 assert(tparam->ty != Tident); | |
| 1358 return deduceType(sc, tparam, parameters, dedtypes); | |
| 1359 } | |
| 1360 | |
| 1361 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1362 | |
| 1363 // Found the corresponding parameter tp | |
| 1364 if (!tp->isTemplateTypeParameter()) | |
| 1365 goto Lnomatch; | |
| 1366 Type *at = (Type *)dedtypes->data[i]; | |
| 1367 if (!at) | |
| 1368 { | |
| 1369 dedtypes->data[i] = (void *)this; | |
| 1370 goto Lexact; | |
| 1371 } | |
| 1372 if (equals(at)) | |
| 1373 goto Lexact; | |
| 1374 else if (ty == Tclass && at->ty == Tclass) | |
| 1375 { | |
| 1376 return (MATCH) implicitConvTo(at); | |
| 1377 } | |
| 1378 else if (ty == Tsarray && at->ty == Tarray && | |
| 1379 nextOf()->equals(at->nextOf())) | |
| 1380 { | |
| 1381 goto Lexact; | |
| 1382 } | |
| 1383 else | |
| 1384 goto Lnomatch; | |
| 1385 } | |
| 1386 | |
| 1387 if (ty != tparam->ty) | |
| 1388 return implicitConvTo(tparam); | |
| 1389 // goto Lnomatch; | |
| 1390 | |
| 1391 if (nextOf()) | |
| 1392 return nextOf()->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
| 1393 | |
| 1394 Lexact: | |
| 1395 return MATCHexact; | |
| 1396 | |
| 1397 Lnomatch: | |
| 1398 return MATCHnomatch; | |
| 1399 } | |
| 1400 | |
| 1401 MATCH TypeSArray::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, | |
| 1402 Objects *dedtypes) | |
| 1403 { | |
| 1404 #if 0 | |
| 1405 printf("TypeSArray::deduceType()\n"); | |
| 1406 printf("\tthis = %d, ", ty); print(); | |
| 1407 printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1408 #endif | |
| 1409 | |
| 1410 // Extra check that array dimensions must match | |
| 1411 if (tparam) | |
| 1412 { | |
| 1413 if (tparam->ty == Tsarray) | |
| 1414 { | |
| 1415 TypeSArray *tp = (TypeSArray *)tparam; | |
| 1416 | |
| 1417 if (tp->dim->op == TOKvar && | |
| 1418 ((VarExp *)tp->dim)->var->storage_class & STCtemplateparameter) | |
| 1419 { int i = templateIdentifierLookup(((VarExp *)tp->dim)->var->ident, parameters); | |
| 1420 // This code matches code in TypeInstance::deduceType() | |
| 1421 if (i == -1) | |
| 1422 goto Lnomatch; | |
| 1423 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1424 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 1425 if (!tvp) | |
| 1426 goto Lnomatch; | |
| 1427 Expression *e = (Expression *)dedtypes->data[i]; | |
| 1428 if (e) | |
| 1429 { | |
| 1430 if (!dim->equals(e)) | |
| 1431 goto Lnomatch; | |
| 1432 } | |
| 1433 else | |
| 1434 { Type *vt = tvp->valType->semantic(0, sc); | |
| 1435 MATCH m = (MATCH)dim->implicitConvTo(vt); | |
| 1436 if (!m) | |
| 1437 goto Lnomatch; | |
| 1438 dedtypes->data[i] = dim; | |
| 1439 } | |
| 1440 } | |
| 1441 else if (dim->toInteger() != tp->dim->toInteger()) | |
| 1442 return MATCHnomatch; | |
| 1443 } | |
| 1444 else if (tparam->ty == Taarray) | |
| 1445 { | |
| 1446 TypeAArray *tp = (TypeAArray *)tparam; | |
| 1447 if (tp->index->ty == Tident) | |
| 1448 { TypeIdentifier *tident = (TypeIdentifier *)tp->index; | |
| 1449 | |
| 1450 if (tident->idents.dim == 0) | |
| 1451 { Identifier *id = tident->ident; | |
| 1452 | |
| 1453 for (size_t i = 0; i < parameters->dim; i++) | |
| 1454 { | |
| 1455 TemplateParameter *tp = (TemplateParameter *)parameters->data[i]; | |
| 1456 | |
| 1457 if (tp->ident->equals(id)) | |
| 1458 { // Found the corresponding template parameter | |
| 1459 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 1460 if (!tvp || !tvp->valType->isintegral()) | |
| 1461 goto Lnomatch; | |
| 1462 | |
| 1463 if (dedtypes->data[i]) | |
| 1464 { | |
| 1465 if (!dim->equals((Object *)dedtypes->data[i])) | |
| 1466 goto Lnomatch; | |
| 1467 } | |
| 1468 else | |
| 1469 { dedtypes->data[i] = (void *)dim; | |
| 1470 } | |
| 1471 return next->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
| 1472 } | |
| 1473 } | |
| 1474 } | |
| 1475 } | |
| 1476 } | |
| 1477 else if (tparam->ty == Tarray) | |
| 1478 { MATCH m; | |
| 1479 | |
| 1480 m = next->deduceType(sc, tparam->nextOf(), parameters, dedtypes); | |
| 1481 if (m == MATCHexact) | |
| 1482 m = MATCHconvert; | |
| 1483 return m; | |
| 1484 } | |
| 1485 } | |
| 1486 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1487 | |
| 1488 Lnomatch: | |
| 1489 return MATCHnomatch; | |
| 1490 } | |
| 1491 | |
| 1492 MATCH TypeAArray::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1493 { | |
| 1494 #if 0 | |
| 1495 printf("TypeAArray::deduceType()\n"); | |
| 1496 printf("\tthis = %d, ", ty); print(); | |
| 1497 printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1498 #endif | |
| 1499 | |
| 1500 // Extra check that index type must match | |
| 1501 if (tparam && tparam->ty == Taarray) | |
| 1502 { | |
| 1503 TypeAArray *tp = (TypeAArray *)tparam; | |
| 1504 if (!index->deduceType(sc, tp->index, parameters, dedtypes)) | |
| 1505 { | |
| 1506 return MATCHnomatch; | |
| 1507 } | |
| 1508 } | |
| 1509 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1510 } | |
| 1511 | |
| 1512 MATCH TypeFunction::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1513 { | |
| 1514 //printf("TypeFunction::deduceType()\n"); | |
| 1515 //printf("\tthis = %d, ", ty); print(); | |
| 1516 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1517 | |
| 1518 // Extra check that function characteristics must match | |
| 1519 if (tparam && tparam->ty == Tfunction) | |
| 1520 { | |
| 1521 TypeFunction *tp = (TypeFunction *)tparam; | |
| 1522 if (varargs != tp->varargs || | |
| 1523 linkage != tp->linkage) | |
| 1524 return MATCHnomatch; | |
| 1525 | |
| 1526 size_t nfargs = Argument::dim(this->parameters); | |
| 1527 size_t nfparams = Argument::dim(tp->parameters); | |
| 1528 | |
| 1529 /* See if tuple match | |
| 1530 */ | |
| 1531 if (nfparams > 0 && nfargs >= nfparams - 1) | |
| 1532 { | |
| 1533 /* See if 'A' of the template parameter matches 'A' | |
| 1534 * of the type of the last function parameter. | |
| 1535 */ | |
| 1536 Argument *fparam = (Argument *)tp->parameters->data[nfparams - 1]; | |
| 1537 if (fparam->type->ty != Tident) | |
| 1538 goto L1; | |
| 1539 TypeIdentifier *tid = (TypeIdentifier *)fparam->type; | |
| 1540 if (tid->idents.dim) | |
| 1541 goto L1; | |
| 1542 | |
| 1543 /* Look through parameters to find tuple matching tid->ident | |
| 1544 */ | |
| 1545 size_t tupi = 0; | |
| 1546 for (; 1; tupi++) | |
| 1547 { if (tupi == parameters->dim) | |
| 1548 goto L1; | |
| 1549 TemplateParameter *t = (TemplateParameter *)parameters->data[tupi]; | |
| 1550 TemplateTupleParameter *tup = t->isTemplateTupleParameter(); | |
| 1551 if (tup && tup->ident->equals(tid->ident)) | |
| 1552 break; | |
| 1553 } | |
| 1554 | |
| 1555 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
| 1556 * now form the tuple argument. | |
| 1557 */ | |
| 1558 int tuple_dim = nfargs - (nfparams - 1); | |
| 1559 | |
| 1560 /* See if existing tuple, and whether it matches or not | |
| 1561 */ | |
| 1562 Object *o = (Object *)dedtypes->data[tupi]; | |
| 1563 if (o) | |
| 1564 { // Existing deduced argument must be a tuple, and must match | |
| 1565 Tuple *t = isTuple(o); | |
| 1566 if (!t || t->objects.dim != tuple_dim) | |
| 1567 return MATCHnomatch; | |
| 1568 for (size_t i = 0; i < tuple_dim; i++) | |
| 1569 { Argument *arg = Argument::getNth(this->parameters, nfparams - 1 + i); | |
| 1570 if (!arg->type->equals((Object *)t->objects.data[i])) | |
| 1571 return MATCHnomatch; | |
| 1572 } | |
| 1573 } | |
| 1574 else | |
| 1575 { // Create new tuple | |
| 1576 Tuple *t = new Tuple(); | |
| 1577 t->objects.setDim(tuple_dim); | |
| 1578 for (size_t i = 0; i < tuple_dim; i++) | |
| 1579 { Argument *arg = Argument::getNth(this->parameters, nfparams - 1 + i); | |
| 1580 t->objects.data[i] = (void *)arg->type; | |
| 1581 } | |
| 1582 dedtypes->data[tupi] = (void *)t; | |
| 1583 } | |
| 1584 nfparams--; // don't consider the last parameter for type deduction | |
| 1585 goto L2; | |
| 1586 } | |
| 1587 | |
| 1588 L1: | |
| 1589 if (nfargs != nfparams) | |
| 1590 return MATCHnomatch; | |
| 1591 L2: | |
| 1592 for (size_t i = 0; i < nfparams; i++) | |
| 1593 { | |
| 1594 Argument *a = Argument::getNth(this->parameters, i); | |
| 1595 Argument *ap = Argument::getNth(tp->parameters, i); | |
| 1596 if (a->storageClass != ap->storageClass || | |
| 1597 !a->type->deduceType(sc, ap->type, parameters, dedtypes)) | |
| 1598 return MATCHnomatch; | |
| 1599 } | |
| 1600 } | |
| 1601 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1602 } | |
| 1603 | |
| 1604 MATCH TypeIdentifier::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1605 { | |
| 1606 // Extra check | |
| 1607 if (tparam && tparam->ty == Tident) | |
| 1608 { | |
| 1609 TypeIdentifier *tp = (TypeIdentifier *)tparam; | |
| 1610 | |
| 1611 for (int i = 0; i < idents.dim; i++) | |
| 1612 { | |
| 1613 Identifier *id1 = (Identifier *)idents.data[i]; | |
| 1614 Identifier *id2 = (Identifier *)tp->idents.data[i]; | |
| 1615 | |
| 1616 if (!id1->equals(id2)) | |
| 1617 return MATCHnomatch; | |
| 1618 } | |
| 1619 } | |
| 1620 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1621 } | |
| 1622 | |
| 1623 MATCH TypeInstance::deduceType(Scope *sc, | |
| 1624 Type *tparam, TemplateParameters *parameters, | |
| 1625 Objects *dedtypes) | |
| 1626 { | |
| 1627 //printf("TypeInstance::deduceType(tparam = %s) %s\n", tparam->toChars(), toChars()); | |
| 1628 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1629 | |
| 1630 // Extra check | |
| 1631 if (tparam && tparam->ty == Tinstance) | |
| 1632 { | |
| 1633 TypeInstance *tp = (TypeInstance *)tparam; | |
| 1634 | |
| 1635 //printf("tempinst->tempdecl = %p\n", tempinst->tempdecl); | |
| 1636 //printf("tp->tempinst->tempdecl = %p\n", tp->tempinst->tempdecl); | |
| 1637 if (!tp->tempinst->tempdecl) | |
| 1638 { //printf("tp->tempinst->name = '%s'\n", tp->tempinst->name->toChars()); | |
| 1639 if (!tp->tempinst->name->equals(tempinst->name)) | |
| 1640 { | |
| 1641 /* Handle case of: | |
| 1642 * template Foo(T : sa!(T), alias sa) | |
| 1643 */ | |
| 1644 int i = templateIdentifierLookup(tp->tempinst->name, parameters); | |
| 1645 if (i == -1) | |
| 1646 { /* Didn't find it as a parameter identifier. Try looking | |
| 1647 * it up and seeing if is an alias. See Bugzilla 1454 | |
| 1648 */ | |
| 1649 Dsymbol *s = tempinst->tempdecl->scope->search(0, tp->tempinst->name, NULL); | |
| 1650 if (s) | |
| 1651 { | |
| 1652 s = s->toAlias(); | |
| 1653 TemplateDeclaration *td = s->isTemplateDeclaration(); | |
| 1654 if (td && td == tempinst->tempdecl) | |
| 1655 goto L2; | |
| 1656 } | |
| 1657 goto Lnomatch; | |
| 1658 } | |
| 1659 TemplateParameter *tpx = (TemplateParameter *)parameters->data[i]; | |
| 1660 // This logic duplicates tpx->matchArg() | |
| 1661 TemplateAliasParameter *ta = tpx->isTemplateAliasParameter(); | |
| 1662 if (!ta) | |
| 1663 goto Lnomatch; | |
| 1664 Dsymbol *sa = tempinst->tempdecl; | |
| 1665 if (!sa) | |
| 1666 goto Lnomatch; | |
| 1667 if (ta->specAlias && sa != ta->specAlias) | |
| 1668 goto Lnomatch; | |
| 1669 if (dedtypes->data[i]) | |
| 1670 { // Must match already deduced symbol | |
| 1671 Dsymbol *s = (Dsymbol *)dedtypes->data[i]; | |
| 1672 | |
| 1673 if (s != sa) | |
| 1674 goto Lnomatch; | |
| 1675 } | |
| 1676 dedtypes->data[i] = sa; | |
| 1677 } | |
| 1678 } | |
| 1679 else if (tempinst->tempdecl != tp->tempinst->tempdecl) | |
| 1680 goto Lnomatch; | |
| 1681 | |
| 1682 L2: | |
| 1683 if (tempinst->tiargs->dim != tp->tempinst->tiargs->dim) | |
| 1684 goto Lnomatch; | |
| 1685 | |
| 1686 for (int i = 0; i < tempinst->tiargs->dim; i++) | |
| 1687 { | |
| 1688 //printf("\ttest: tempinst->tiargs[%d]\n", i); | |
| 1689 int j; | |
| 1690 Object *o1 = (Object *)tempinst->tiargs->data[i]; | |
| 1691 Object *o2 = (Object *)tp->tempinst->tiargs->data[i]; | |
| 1692 | |
| 1693 Type *t1 = isType(o1); | |
| 1694 Type *t2 = isType(o2); | |
| 1695 | |
| 1696 Expression *e1 = isExpression(o1); | |
| 1697 Expression *e2 = isExpression(o2); | |
| 1698 | |
| 1699 #if 0 | |
| 1700 if (t1) printf("t1 = %s\n", t1->toChars()); | |
| 1701 if (t2) printf("t2 = %s\n", t2->toChars()); | |
| 1702 if (e1) printf("e1 = %s\n", e1->toChars()); | |
| 1703 if (e2) printf("e2 = %s\n", e2->toChars()); | |
| 1704 #endif | |
| 1705 | |
| 1706 if (t1 && t2) | |
| 1707 { | |
| 1708 if (!t1->deduceType(sc, t2, parameters, dedtypes)) | |
| 1709 goto Lnomatch; | |
| 1710 } | |
| 1711 else if (e1 && e2) | |
| 1712 { | |
| 1713 if (!e1->equals(e2)) | |
| 1714 { if (e2->op == TOKvar) | |
| 1715 { | |
| 1716 /* | |
| 1717 * (T:Number!(e2), int e2) | |
| 1718 */ | |
| 1719 j = templateIdentifierLookup(((VarExp *)e2)->var->ident, parameters); | |
| 1720 goto L1; | |
| 1721 } | |
| 1722 goto Lnomatch; | |
| 1723 } | |
| 1724 } | |
| 1725 else if (e1 && t2 && t2->ty == Tident) | |
| 1726 { | |
| 1727 j = templateParameterLookup(t2, parameters); | |
| 1728 L1: | |
| 1729 if (j == -1) | |
| 1730 goto Lnomatch; | |
| 1731 TemplateParameter *tp = (TemplateParameter *)parameters->data[j]; | |
| 1732 // BUG: use tp->matchArg() instead of the following | |
| 1733 TemplateValueParameter *tv = tp->isTemplateValueParameter(); | |
| 1734 if (!tv) | |
| 1735 goto Lnomatch; | |
| 1736 Expression *e = (Expression *)dedtypes->data[j]; | |
| 1737 if (e) | |
| 1738 { | |
| 1739 if (!e1->equals(e)) | |
| 1740 goto Lnomatch; | |
| 1741 } | |
| 1742 else | |
| 1743 { Type *vt = tv->valType->semantic(0, sc); | |
| 1744 MATCH m = (MATCH)e1->implicitConvTo(vt); | |
| 1745 if (!m) | |
| 1746 goto Lnomatch; | |
| 1747 dedtypes->data[j] = e1; | |
| 1748 } | |
| 1749 } | |
| 1750 // BUG: Need to handle alias and tuple parameters | |
| 1751 else | |
| 1752 goto Lnomatch; | |
| 1753 } | |
| 1754 } | |
| 1755 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1756 | |
| 1757 Lnomatch: | |
| 1758 return MATCHnomatch; | |
| 1759 } | |
| 1760 | |
| 1761 MATCH TypeStruct::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1762 { | |
| 1763 //printf("TypeStruct::deduceType()\n"); | |
| 1764 //printf("\tthis->parent = %s, ", sym->parent->toChars()); print(); | |
| 1765 //printf("\ttparam = %d, ", tparam->ty); tparam->print(); | |
| 1766 | |
| 1767 /* If this struct is a template struct, and we're matching | |
| 1768 * it against a template instance, convert the struct type | |
| 1769 * to a template instance, too, and try again. | |
| 1770 */ | |
| 1771 TemplateInstance *ti = sym->parent->isTemplateInstance(); | |
| 1772 | |
| 1773 if (tparam && tparam->ty == Tinstance) | |
| 1774 { | |
| 1775 if (ti && ti->toAlias() == sym) | |
| 1776 { | |
| 1777 TypeInstance *t = new TypeInstance(0, ti); | |
| 1778 return t->deduceType(sc, tparam, parameters, dedtypes); | |
| 1779 } | |
| 1780 | |
| 1781 /* Match things like: | |
| 1782 * S!(T).foo | |
| 1783 */ | |
| 1784 TypeInstance *tpi = (TypeInstance *)tparam; | |
| 1785 if (tpi->idents.dim) | |
| 1786 { Identifier *id = (Identifier *)tpi->idents.data[tpi->idents.dim - 1]; | |
| 1787 if (id->dyncast() == DYNCAST_IDENTIFIER && sym->ident->equals(id)) | |
| 1788 { | |
| 1789 Type *tparent = sym->parent->getType(); | |
| 1790 if (tparent) | |
| 1791 { | |
| 1792 /* Slice off the .foo in S!(T).foo | |
| 1793 */ | |
| 1794 tpi->idents.dim--; | |
| 1795 MATCH m = tparent->deduceType(sc, tpi, parameters, dedtypes); | |
| 1796 tpi->idents.dim++; | |
| 1797 return m; | |
| 1798 } | |
| 1799 } | |
| 1800 } | |
| 1801 } | |
| 1802 | |
| 1803 // Extra check | |
| 1804 if (tparam && tparam->ty == Tstruct) | |
| 1805 { | |
| 1806 TypeStruct *tp = (TypeStruct *)tparam; | |
| 1807 | |
| 1808 if (sym != tp->sym) | |
| 1809 return MATCHnomatch; | |
| 1810 } | |
| 1811 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1812 } | |
| 1813 | |
| 1814 MATCH TypeEnum::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1815 { | |
| 1816 // Extra check | |
| 1817 if (tparam && tparam->ty == Tenum) | |
| 1818 { | |
| 1819 TypeEnum *tp = (TypeEnum *)tparam; | |
| 1820 | |
| 1821 if (sym != tp->sym) | |
| 1822 return MATCHnomatch; | |
| 1823 } | |
| 1824 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1825 } | |
| 1826 | |
| 1827 MATCH TypeTypedef::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1828 { | |
| 1829 // Extra check | |
| 1830 if (tparam && tparam->ty == Ttypedef) | |
| 1831 { | |
| 1832 TypeTypedef *tp = (TypeTypedef *)tparam; | |
| 1833 | |
| 1834 if (sym != tp->sym) | |
| 1835 return MATCHnomatch; | |
| 1836 } | |
| 1837 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1838 } | |
| 1839 | |
| 1840 MATCH TypeClass::deduceType(Scope *sc, Type *tparam, TemplateParameters *parameters, Objects *dedtypes) | |
| 1841 { | |
| 1842 //printf("TypeClass::deduceType(this = %s)\n", toChars()); | |
| 1843 | |
| 1844 /* If this class is a template class, and we're matching | |
| 1845 * it against a template instance, convert the class type | |
| 1846 * to a template instance, too, and try again. | |
| 1847 */ | |
| 1848 TemplateInstance *ti = sym->parent->isTemplateInstance(); | |
| 1849 | |
| 1850 if (tparam && tparam->ty == Tinstance) | |
| 1851 { | |
| 1852 if (ti && ti->toAlias() == sym) | |
| 1853 { | |
| 1854 TypeInstance *t = new TypeInstance(0, ti); | |
| 1855 return t->deduceType(sc, tparam, parameters, dedtypes); | |
| 1856 } | |
| 1857 | |
| 1858 /* Match things like: | |
| 1859 * S!(T).foo | |
| 1860 */ | |
| 1861 TypeInstance *tpi = (TypeInstance *)tparam; | |
| 1862 if (tpi->idents.dim) | |
| 1863 { Identifier *id = (Identifier *)tpi->idents.data[tpi->idents.dim - 1]; | |
| 1864 if (id->dyncast() == DYNCAST_IDENTIFIER && sym->ident->equals(id)) | |
| 1865 { | |
| 1866 Type *tparent = sym->parent->getType(); | |
| 1867 if (tparent) | |
| 1868 { | |
| 1869 /* Slice off the .foo in S!(T).foo | |
| 1870 */ | |
| 1871 tpi->idents.dim--; | |
| 1872 MATCH m = tparent->deduceType(sc, tpi, parameters, dedtypes); | |
| 1873 tpi->idents.dim++; | |
| 1874 return m; | |
| 1875 } | |
| 1876 } | |
| 1877 } | |
| 1878 } | |
| 1879 | |
| 1880 // Extra check | |
| 1881 if (tparam && tparam->ty == Tclass) | |
| 1882 { | |
| 1883 TypeClass *tp = (TypeClass *)tparam; | |
| 1884 | |
| 1885 //printf("\t%d\n", (MATCH) implicitConvTo(tp)); | |
| 1886 return (MATCH) implicitConvTo(tp); | |
| 1887 } | |
| 1888 return Type::deduceType(sc, tparam, parameters, dedtypes); | |
| 1889 } | |
| 1890 | |
| 1891 /* ======================== TemplateParameter =============================== */ | |
| 1892 | |
| 1893 TemplateParameter::TemplateParameter(Loc loc, Identifier *ident) | |
| 1894 { | |
| 1895 this->loc = loc; | |
| 1896 this->ident = ident; | |
| 1897 this->sparam = NULL; | |
| 1898 } | |
| 1899 | |
| 1900 TemplateTypeParameter *TemplateParameter::isTemplateTypeParameter() | |
| 1901 { | |
| 1902 return NULL; | |
| 1903 } | |
| 1904 | |
| 1905 TemplateValueParameter *TemplateParameter::isTemplateValueParameter() | |
| 1906 { | |
| 1907 return NULL; | |
| 1908 } | |
| 1909 | |
| 1910 TemplateAliasParameter *TemplateParameter::isTemplateAliasParameter() | |
| 1911 { | |
| 1912 return NULL; | |
| 1913 } | |
| 1914 | |
| 1915 TemplateTupleParameter *TemplateParameter::isTemplateTupleParameter() | |
| 1916 { | |
| 1917 return NULL; | |
| 1918 } | |
| 1919 | |
| 1920 #if DMDV2 | |
| 1921 TemplateThisParameter *TemplateParameter::isTemplateThisParameter() | |
| 1922 { | |
| 1923 return NULL; | |
| 1924 } | |
| 1925 #endif | |
| 1926 | |
| 1927 /* ======================== TemplateTypeParameter =========================== */ | |
| 1928 | |
| 1929 // type-parameter | |
| 1930 | |
| 1931 TemplateTypeParameter::TemplateTypeParameter(Loc loc, Identifier *ident, Type *specType, | |
| 1932 Type *defaultType) | |
| 1933 : TemplateParameter(loc, ident) | |
| 1934 { | |
| 1935 this->ident = ident; | |
| 1936 this->specType = specType; | |
| 1937 this->defaultType = defaultType; | |
| 1938 } | |
| 1939 | |
| 1940 TemplateTypeParameter *TemplateTypeParameter::isTemplateTypeParameter() | |
| 1941 { | |
| 1942 return this; | |
| 1943 } | |
| 1944 | |
| 1945 TemplateParameter *TemplateTypeParameter::syntaxCopy() | |
| 1946 { | |
| 1947 TemplateTypeParameter *tp = new TemplateTypeParameter(loc, ident, specType, defaultType); | |
| 1948 if (tp->specType) | |
| 1949 tp->specType = specType->syntaxCopy(); | |
| 1950 if (defaultType) | |
| 1951 tp->defaultType = defaultType->syntaxCopy(); | |
| 1952 return tp; | |
| 1953 } | |
| 1954 | |
| 1955 void TemplateTypeParameter::declareParameter(Scope *sc) | |
| 1956 { | |
| 1957 //printf("TemplateTypeParameter::declareParameter('%s')\n", ident->toChars()); | |
| 1958 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
| 1959 sparam = new AliasDeclaration(loc, ident, ti); | |
| 1960 if (!sc->insert(sparam)) | |
| 1961 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
| 1962 } | |
| 1963 | |
| 1964 void TemplateTypeParameter::semantic(Scope *sc) | |
| 1965 { | |
| 1966 //printf("TemplateTypeParameter::semantic('%s')\n", ident->toChars()); | |
| 1967 if (specType) | |
| 1968 { | |
| 1969 specType = specType->semantic(loc, sc); | |
| 1970 } | |
| 1971 #if 0 // Don't do semantic() until instantiation | |
| 1972 if (defaultType) | |
| 1973 { | |
| 1974 defaultType = defaultType->semantic(loc, sc); | |
| 1975 } | |
| 1976 #endif | |
| 1977 } | |
| 1978 | |
| 1979 /**************************************** | |
| 1980 * Determine if two TemplateParameters are the same | |
| 1981 * as far as TemplateDeclaration overloading goes. | |
| 1982 * Returns: | |
| 1983 * 1 match | |
| 1984 * 0 no match | |
| 1985 */ | |
| 1986 | |
| 1987 int TemplateTypeParameter::overloadMatch(TemplateParameter *tp) | |
| 1988 { | |
| 1989 TemplateTypeParameter *ttp = tp->isTemplateTypeParameter(); | |
| 1990 | |
| 1991 if (ttp) | |
| 1992 { | |
| 1993 if (specType != ttp->specType) | |
| 1994 goto Lnomatch; | |
| 1995 | |
| 1996 if (specType && !specType->equals(ttp->specType)) | |
| 1997 goto Lnomatch; | |
| 1998 | |
| 1999 return 1; // match | |
| 2000 } | |
| 2001 | |
| 2002 Lnomatch: | |
| 2003 return 0; | |
| 2004 } | |
| 2005 | |
| 2006 /******************************************* | |
| 2007 * Match to a particular TemplateParameter. | |
| 2008 * Input: | |
| 2009 * i i'th argument | |
| 2010 * tiargs[] actual arguments to template instance | |
| 2011 * parameters[] template parameters | |
| 2012 * dedtypes[] deduced arguments to template instance | |
| 2013 * *psparam set to symbol declared and initialized to dedtypes[i] | |
| 2014 */ | |
| 2015 | |
| 2016 MATCH TemplateTypeParameter::matchArg(Scope *sc, Objects *tiargs, | |
| 2017 int i, TemplateParameters *parameters, Objects *dedtypes, | |
| 2018 Declaration **psparam) | |
| 2019 { | |
| 2020 //printf("TemplateTypeParameter::matchArg()\n"); | |
| 2021 Type *t; | |
| 2022 Object *oarg; | |
| 2023 MATCH m = MATCHexact; | |
| 2024 Type *ta; | |
| 2025 | |
| 2026 if (i < tiargs->dim) | |
| 2027 oarg = (Object *)tiargs->data[i]; | |
| 2028 else | |
| 2029 { // Get default argument instead | |
| 2030 oarg = defaultArg(sc); | |
| 2031 if (!oarg) | |
| 2032 { assert(i < dedtypes->dim); | |
| 2033 // It might have already been deduced | |
| 2034 oarg = (Object *)dedtypes->data[i]; | |
| 2035 if (!oarg) | |
| 2036 goto Lnomatch; | |
| 2037 } | |
| 2038 } | |
| 2039 | |
| 2040 ta = isType(oarg); | |
| 2041 if (!ta) | |
| 2042 goto Lnomatch; | |
| 2043 //printf("ta is %s\n", ta->toChars()); | |
| 2044 | |
| 2045 t = (Type *)dedtypes->data[i]; | |
| 2046 | |
| 2047 if (specType) | |
| 2048 { | |
| 2049 //printf("\tcalling deduceType(): ta is %s, specType is %s\n", ta->toChars(), specType->toChars()); | |
| 2050 MATCH m2 = ta->deduceType(sc, specType, parameters, dedtypes); | |
| 2051 if (m2 == MATCHnomatch) | |
| 2052 { //printf("\tfailed deduceType\n"); | |
| 2053 goto Lnomatch; | |
| 2054 } | |
| 2055 | |
| 2056 if (m2 < m) | |
| 2057 m = m2; | |
| 2058 t = (Type *)dedtypes->data[i]; | |
| 2059 } | |
| 2060 else | |
| 2061 { | |
| 2062 // So that matches with specializations are better | |
| 2063 m = MATCHconvert; | |
| 2064 if (t) | |
| 2065 { // Must match already deduced type | |
| 2066 | |
| 2067 m = MATCHexact; | |
| 2068 if (!t->equals(ta)) | |
| 2069 { //printf("t = %s ta = %s\n", t->toChars(), ta->toChars()); | |
| 2070 goto Lnomatch; | |
| 2071 } | |
| 2072 } | |
| 2073 } | |
| 2074 | |
| 2075 if (!t) | |
| 2076 { | |
| 2077 dedtypes->data[i] = ta; | |
| 2078 t = ta; | |
| 2079 } | |
| 2080 *psparam = new AliasDeclaration(loc, ident, t); | |
| 2081 //printf("\tm = %d\n", m); | |
| 2082 return m; | |
| 2083 | |
| 2084 Lnomatch: | |
| 2085 *psparam = NULL; | |
| 2086 //printf("\tm = %d\n", MATCHnomatch); | |
| 2087 return MATCHnomatch; | |
| 2088 } | |
| 2089 | |
| 2090 | |
| 2091 void TemplateTypeParameter::print(Object *oarg, Object *oded) | |
| 2092 { | |
| 2093 printf(" %s\n", ident->toChars()); | |
| 2094 | |
| 2095 Type *t = isType(oarg); | |
| 2096 Type *ta = isType(oded); | |
| 2097 | |
| 2098 assert(ta); | |
| 2099 | |
| 2100 if (specType) | |
| 2101 printf("\tSpecialization: %s\n", specType->toChars()); | |
| 2102 if (defaultType) | |
| 2103 printf("\tDefault: %s\n", defaultType->toChars()); | |
| 2104 printf("\tArgument: %s\n", t ? t->toChars() : "NULL"); | |
| 2105 printf("\tDeduced Type: %s\n", ta->toChars()); | |
| 2106 } | |
| 2107 | |
| 2108 | |
| 2109 void TemplateTypeParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2110 { | |
| 2111 buf->writestring(ident->toChars()); | |
| 2112 if (specType) | |
| 2113 { | |
| 2114 buf->writestring(" : "); | |
| 2115 specType->toCBuffer(buf, NULL, hgs); | |
| 2116 } | |
| 2117 if (defaultType) | |
| 2118 { | |
| 2119 buf->writestring(" = "); | |
| 2120 defaultType->toCBuffer(buf, NULL, hgs); | |
| 2121 } | |
| 2122 } | |
| 2123 | |
| 2124 | |
| 2125 void *TemplateTypeParameter::dummyArg() | |
| 2126 { Type *t; | |
| 2127 | |
| 2128 if (specType) | |
| 2129 t = specType; | |
| 2130 else | |
| 2131 { // Use this for alias-parameter's too (?) | |
| 2132 t = new TypeIdentifier(loc, ident); | |
| 2133 } | |
| 2134 return (void *)t; | |
| 2135 } | |
| 2136 | |
| 2137 | |
| 2138 Object *TemplateTypeParameter::specialization() | |
| 2139 { | |
| 2140 return specType; | |
| 2141 } | |
| 2142 | |
| 2143 | |
| 2144 Object *TemplateTypeParameter::defaultArg(Scope *sc) | |
| 2145 { | |
| 2146 Type *t; | |
| 2147 | |
| 2148 t = defaultType; | |
| 2149 if (t) | |
| 2150 { | |
| 2151 t = t->syntaxCopy(); | |
| 2152 t = t->semantic(loc, sc); | |
| 2153 } | |
| 2154 return t; | |
| 2155 } | |
| 2156 | |
| 2157 /* ======================== TemplateThisParameter =========================== */ | |
| 2158 | |
| 2159 #if DMDV2 | |
| 2160 // this-parameter | |
| 2161 | |
| 2162 TemplateThisParameter::TemplateThisParameter(Loc loc, Identifier *ident, | |
| 2163 Type *specType, | |
| 2164 Type *defaultType) | |
| 2165 : TemplateTypeParameter(loc, ident, specType, defaultType) | |
| 2166 { | |
| 2167 } | |
| 2168 | |
| 2169 TemplateThisParameter *TemplateThisParameter::isTemplateThisParameter() | |
| 2170 { | |
| 2171 return this; | |
| 2172 } | |
| 2173 | |
| 2174 TemplateParameter *TemplateThisParameter::syntaxCopy() | |
| 2175 { | |
| 2176 TemplateThisParameter *tp = new TemplateThisParameter(loc, ident, specType, defaultType); | |
| 2177 if (tp->specType) | |
| 2178 tp->specType = specType->syntaxCopy(); | |
| 2179 if (defaultType) | |
| 2180 tp->defaultType = defaultType->syntaxCopy(); | |
| 2181 return tp; | |
| 2182 } | |
| 2183 | |
| 2184 void TemplateThisParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2185 { | |
| 2186 buf->writestring("this "); | |
| 2187 TemplateTypeParameter::toCBuffer(buf, hgs); | |
| 2188 } | |
| 2189 #endif | |
| 2190 | |
| 2191 /* ======================== TemplateAliasParameter ========================== */ | |
| 2192 | |
| 2193 // alias-parameter | |
| 2194 | |
| 2195 Dsymbol *TemplateAliasParameter::sdummy = NULL; | |
| 2196 | |
| 2197 TemplateAliasParameter::TemplateAliasParameter(Loc loc, Identifier *ident, Type *specAliasT, Type *defaultAlias) | |
| 2198 : TemplateParameter(loc, ident) | |
| 2199 { | |
| 2200 this->ident = ident; | |
| 2201 this->specAliasT = specAliasT; | |
| 2202 this->defaultAlias = defaultAlias; | |
| 2203 | |
| 2204 this->specAlias = NULL; | |
| 2205 } | |
| 2206 | |
| 2207 TemplateAliasParameter *TemplateAliasParameter::isTemplateAliasParameter() | |
| 2208 { | |
| 2209 return this; | |
| 2210 } | |
| 2211 | |
| 2212 TemplateParameter *TemplateAliasParameter::syntaxCopy() | |
| 2213 { | |
| 2214 TemplateAliasParameter *tp = new TemplateAliasParameter(loc, ident, specAliasT, defaultAlias); | |
| 2215 if (tp->specAliasT) | |
| 2216 tp->specAliasT = specAliasT->syntaxCopy(); | |
| 2217 if (defaultAlias) | |
| 2218 tp->defaultAlias = defaultAlias->syntaxCopy(); | |
| 2219 return tp; | |
| 2220 } | |
| 2221 | |
| 2222 void TemplateAliasParameter::declareParameter(Scope *sc) | |
| 2223 { | |
| 2224 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
| 2225 sparam = new AliasDeclaration(loc, ident, ti); | |
| 2226 if (!sc->insert(sparam)) | |
| 2227 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
| 2228 } | |
| 2229 | |
| 2230 void TemplateAliasParameter::semantic(Scope *sc) | |
| 2231 { | |
| 2232 if (specAliasT) | |
| 2233 { | |
| 2234 specAlias = specAliasT->toDsymbol(sc); | |
| 2235 if (!specAlias) | |
| 2236 error(loc, "%s is not a symbol", specAliasT->toChars()); | |
| 2237 } | |
| 2238 #if 0 // Don't do semantic() until instantiation | |
| 2239 if (defaultAlias) | |
| 2240 defaultAlias = defaultAlias->semantic(loc, sc); | |
| 2241 #endif | |
| 2242 } | |
| 2243 | |
| 2244 int TemplateAliasParameter::overloadMatch(TemplateParameter *tp) | |
| 2245 { | |
| 2246 TemplateAliasParameter *tap = tp->isTemplateAliasParameter(); | |
| 2247 | |
| 2248 if (tap) | |
| 2249 { | |
| 2250 if (specAlias != tap->specAlias) | |
| 2251 goto Lnomatch; | |
| 2252 | |
| 2253 return 1; // match | |
| 2254 } | |
| 2255 | |
| 2256 Lnomatch: | |
| 2257 return 0; | |
| 2258 } | |
| 2259 | |
| 2260 MATCH TemplateAliasParameter::matchArg(Scope *sc, | |
| 2261 Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, | |
| 2262 Declaration **psparam) | |
| 2263 { | |
| 2264 Dsymbol *sa; | |
| 2265 Object *oarg; | |
| 2266 Expression *ea; | |
| 2267 | |
| 2268 //printf("TemplateAliasParameter::matchArg()\n"); | |
| 2269 | |
| 2270 if (i < tiargs->dim) | |
| 2271 oarg = (Object *)tiargs->data[i]; | |
| 2272 else | |
| 2273 { // Get default argument instead | |
| 2274 oarg = defaultArg(sc); | |
| 2275 if (!oarg) | |
| 2276 { assert(i < dedtypes->dim); | |
| 2277 // It might have already been deduced | |
| 2278 oarg = (Object *)dedtypes->data[i]; | |
| 2279 if (!oarg) | |
| 2280 goto Lnomatch; | |
| 2281 } | |
| 2282 } | |
| 2283 | |
| 2284 sa = getDsymbol(oarg); | |
| 2285 if (!sa) | |
| 2286 goto Lnomatch; | |
| 2287 | |
| 2288 if (specAlias) | |
| 2289 { | |
| 2290 if (!sa || sa == sdummy) | |
| 2291 goto Lnomatch; | |
| 2292 if (sa != specAlias) | |
| 2293 goto Lnomatch; | |
| 2294 } | |
| 2295 else if (dedtypes->data[i]) | |
| 2296 { // Must match already deduced symbol | |
| 2297 Dsymbol *s = (Dsymbol *)dedtypes->data[i]; | |
| 2298 | |
| 2299 if (!sa || s != sa) | |
| 2300 goto Lnomatch; | |
| 2301 } | |
| 2302 dedtypes->data[i] = sa; | |
| 2303 | |
| 2304 *psparam = new AliasDeclaration(loc, ident, sa); | |
| 2305 return MATCHexact; | |
| 2306 | |
| 2307 Lnomatch: | |
| 2308 *psparam = NULL; | |
| 2309 return MATCHnomatch; | |
| 2310 } | |
| 2311 | |
| 2312 | |
| 2313 void TemplateAliasParameter::print(Object *oarg, Object *oded) | |
| 2314 { | |
| 2315 printf(" %s\n", ident->toChars()); | |
| 2316 | |
| 2317 Dsymbol *sa = isDsymbol(oded); | |
| 2318 assert(sa); | |
| 2319 | |
| 2320 printf("\tArgument alias: %s\n", sa->toChars()); | |
| 2321 } | |
| 2322 | |
| 2323 void TemplateAliasParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2324 { | |
| 2325 buf->writestring("alias "); | |
| 2326 buf->writestring(ident->toChars()); | |
| 2327 if (specAliasT) | |
| 2328 { | |
| 2329 buf->writestring(" : "); | |
| 2330 specAliasT->toCBuffer(buf, NULL, hgs); | |
| 2331 } | |
| 2332 if (defaultAlias) | |
| 2333 { | |
| 2334 buf->writestring(" = "); | |
| 2335 defaultAlias->toCBuffer(buf, NULL, hgs); | |
| 2336 } | |
| 2337 } | |
| 2338 | |
| 2339 | |
| 2340 void *TemplateAliasParameter::dummyArg() | |
| 2341 { Dsymbol *s; | |
| 2342 | |
| 2343 s = specAlias; | |
| 2344 if (!s) | |
| 2345 { | |
| 2346 if (!sdummy) | |
| 2347 sdummy = new Dsymbol(); | |
| 2348 s = sdummy; | |
| 2349 } | |
| 2350 return (void*)s; | |
| 2351 } | |
| 2352 | |
| 2353 | |
| 2354 Object *TemplateAliasParameter::specialization() | |
| 2355 { | |
| 2356 return specAliasT; | |
| 2357 } | |
| 2358 | |
| 2359 | |
| 2360 Object *TemplateAliasParameter::defaultArg(Scope *sc) | |
| 2361 { | |
| 2362 Dsymbol *s = NULL; | |
| 2363 | |
| 2364 if (defaultAlias) | |
| 2365 { | |
| 2366 s = defaultAlias->toDsymbol(sc); | |
| 2367 if (!s) | |
| 2368 error("%s is not a symbol", defaultAlias->toChars()); | |
| 2369 } | |
| 2370 return s; | |
| 2371 } | |
| 2372 | |
| 2373 /* ======================== TemplateValueParameter ========================== */ | |
| 2374 | |
| 2375 // value-parameter | |
| 2376 | |
| 2377 Expression *TemplateValueParameter::edummy = NULL; | |
| 2378 | |
| 2379 TemplateValueParameter::TemplateValueParameter(Loc loc, Identifier *ident, Type *valType, | |
| 2380 Expression *specValue, Expression *defaultValue) | |
| 2381 : TemplateParameter(loc, ident) | |
| 2382 { | |
| 2383 this->ident = ident; | |
| 2384 this->valType = valType; | |
| 2385 this->specValue = specValue; | |
| 2386 this->defaultValue = defaultValue; | |
| 2387 } | |
| 2388 | |
| 2389 TemplateValueParameter *TemplateValueParameter::isTemplateValueParameter() | |
| 2390 { | |
| 2391 return this; | |
| 2392 } | |
| 2393 | |
| 2394 TemplateParameter *TemplateValueParameter::syntaxCopy() | |
| 2395 { | |
| 2396 TemplateValueParameter *tp = | |
| 2397 new TemplateValueParameter(loc, ident, valType, specValue, defaultValue); | |
| 2398 tp->valType = valType->syntaxCopy(); | |
| 2399 if (specValue) | |
| 2400 tp->specValue = specValue->syntaxCopy(); | |
| 2401 if (defaultValue) | |
| 2402 tp->defaultValue = defaultValue->syntaxCopy(); | |
| 2403 return tp; | |
| 2404 } | |
| 2405 | |
| 2406 void TemplateValueParameter::declareParameter(Scope *sc) | |
| 2407 { | |
| 2408 VarDeclaration *v = new VarDeclaration(loc, valType, ident, NULL); | |
| 2409 v->storage_class = STCtemplateparameter; | |
| 2410 if (!sc->insert(v)) | |
| 2411 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
| 2412 sparam = v; | |
| 2413 } | |
| 2414 | |
| 2415 void TemplateValueParameter::semantic(Scope *sc) | |
| 2416 { | |
| 2417 sparam->semantic(sc); | |
| 2418 valType = valType->semantic(loc, sc); | |
| 2419 if (!(valType->isintegral() || valType->isfloating() || valType->isString()) && | |
| 2420 valType->ty != Tident) | |
| 2421 error(loc, "arithmetic/string type expected for value-parameter, not %s", valType->toChars()); | |
| 2422 | |
| 2423 if (specValue) | |
| 2424 { Expression *e = specValue; | |
| 2425 | |
| 2426 e = e->semantic(sc); | |
| 2427 e = e->implicitCastTo(sc, valType); | |
| 2428 e = e->optimize(WANTvalue | WANTinterpret); | |
| 2429 if (e->op == TOKint64 || e->op == TOKfloat64 || | |
| 2430 e->op == TOKcomplex80 || e->op == TOKnull || e->op == TOKstring) | |
| 2431 specValue = e; | |
| 2432 //e->toInteger(); | |
| 2433 } | |
| 2434 | |
| 2435 #if 0 // defer semantic analysis to arg match | |
| 2436 if (defaultValue) | |
| 2437 { Expression *e = defaultValue; | |
| 2438 | |
| 2439 e = e->semantic(sc); | |
| 2440 e = e->implicitCastTo(sc, valType); | |
| 2441 e = e->optimize(WANTvalue | WANTinterpret); | |
| 2442 if (e->op == TOKint64) | |
| 2443 defaultValue = e; | |
| 2444 //e->toInteger(); | |
| 2445 } | |
| 2446 #endif | |
| 2447 } | |
| 2448 | |
| 2449 int TemplateValueParameter::overloadMatch(TemplateParameter *tp) | |
| 2450 { | |
| 2451 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 2452 | |
| 2453 if (tvp) | |
| 2454 { | |
| 2455 if (valType != tvp->valType) | |
| 2456 goto Lnomatch; | |
| 2457 | |
| 2458 if (valType && !valType->equals(tvp->valType)) | |
| 2459 goto Lnomatch; | |
| 2460 | |
| 2461 if (specValue != tvp->specValue) | |
| 2462 goto Lnomatch; | |
| 2463 | |
| 2464 return 1; // match | |
| 2465 } | |
| 2466 | |
| 2467 Lnomatch: | |
| 2468 return 0; | |
| 2469 } | |
| 2470 | |
| 2471 | |
| 2472 MATCH TemplateValueParameter::matchArg(Scope *sc, | |
| 2473 Objects *tiargs, int i, TemplateParameters *parameters, Objects *dedtypes, | |
| 2474 Declaration **psparam) | |
| 2475 { | |
| 2476 //printf("TemplateValueParameter::matchArg()\n"); | |
| 2477 | |
| 2478 Initializer *init; | |
| 2479 Declaration *sparam; | |
| 2480 MATCH m = MATCHexact; | |
| 2481 Expression *ei; | |
| 2482 Object *oarg; | |
| 2483 | |
| 2484 if (i < tiargs->dim) | |
| 2485 oarg = (Object *)tiargs->data[i]; | |
| 2486 else | |
| 2487 { // Get default argument instead | |
| 2488 oarg = defaultArg(sc); | |
| 2489 if (!oarg) | |
| 2490 { assert(i < dedtypes->dim); | |
| 2491 // It might have already been deduced | |
| 2492 oarg = (Object *)dedtypes->data[i]; | |
| 2493 if (!oarg) | |
| 2494 goto Lnomatch; | |
| 2495 } | |
| 2496 } | |
| 2497 | |
| 2498 ei = isExpression(oarg); | |
| 2499 Type *vt; | |
| 2500 | |
| 2501 if (!ei && oarg) | |
| 2502 goto Lnomatch; | |
| 2503 | |
| 2504 if (specValue) | |
| 2505 { | |
| 2506 if (!ei || ei == edummy) | |
| 2507 goto Lnomatch; | |
| 2508 | |
| 2509 Expression *e = specValue; | |
| 2510 | |
| 2511 e = e->semantic(sc); | |
| 2512 e = e->implicitCastTo(sc, valType); | |
| 2513 e = e->optimize(WANTvalue | WANTinterpret); | |
| 2514 | |
| 2515 ei = ei->syntaxCopy(); | |
| 2516 ei = ei->semantic(sc); | |
| 2517 ei = ei->optimize(WANTvalue | WANTinterpret); | |
| 2518 //printf("ei: %s, %s\n", ei->toChars(), ei->type->toChars()); | |
| 2519 //printf("e : %s, %s\n", e->toChars(), e->type->toChars()); | |
| 2520 if (!ei->equals(e)) | |
| 2521 goto Lnomatch; | |
| 2522 } | |
| 2523 else if (dedtypes->data[i]) | |
| 2524 { // Must match already deduced value | |
| 2525 Expression *e = (Expression *)dedtypes->data[i]; | |
| 2526 | |
| 2527 if (!ei || !ei->equals(e)) | |
| 2528 goto Lnomatch; | |
| 2529 } | |
| 2530 Lmatch: | |
| 2531 //printf("valType: %s, ty = %d\n", valType->toChars(), valType->ty); | |
| 2532 vt = valType->semantic(0, sc); | |
| 2533 //printf("ei: %s, %s\n", ei->toChars(), ei->type->toChars()); | |
| 2534 if (ei->type) | |
| 2535 { | |
| 2536 m = (MATCH)ei->implicitConvTo(vt); | |
| 2537 //printf("m: %d\n", m); | |
| 2538 if (!m) | |
| 2539 goto Lnomatch; | |
| 2540 } | |
| 2541 dedtypes->data[i] = ei; | |
| 2542 | |
| 2543 init = new ExpInitializer(loc, ei); | |
| 2544 sparam = new VarDeclaration(loc, vt, ident, init); | |
| 2545 sparam->storage_class = STCconst; | |
| 2546 *psparam = sparam; | |
| 2547 return m; | |
| 2548 | |
| 2549 Lnomatch: | |
| 2550 //printf("\tno match\n"); | |
| 2551 *psparam = NULL; | |
| 2552 return MATCHnomatch; | |
| 2553 } | |
| 2554 | |
| 2555 | |
| 2556 void TemplateValueParameter::print(Object *oarg, Object *oded) | |
| 2557 { | |
| 2558 printf(" %s\n", ident->toChars()); | |
| 2559 | |
| 2560 Expression *ea = isExpression(oded); | |
| 2561 | |
| 2562 if (specValue) | |
| 2563 printf("\tSpecialization: %s\n", specValue->toChars()); | |
| 2564 printf("\tArgument Value: %s\n", ea ? ea->toChars() : "NULL"); | |
| 2565 } | |
| 2566 | |
| 2567 | |
| 2568 void TemplateValueParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2569 { | |
| 2570 valType->toCBuffer(buf, ident, hgs); | |
| 2571 if (specValue) | |
| 2572 { | |
| 2573 buf->writestring(" : "); | |
| 2574 specValue->toCBuffer(buf, hgs); | |
| 2575 } | |
| 2576 if (defaultValue) | |
| 2577 { | |
| 2578 buf->writestring(" = "); | |
| 2579 defaultValue->toCBuffer(buf, hgs); | |
| 2580 } | |
| 2581 } | |
| 2582 | |
| 2583 | |
| 2584 void *TemplateValueParameter::dummyArg() | |
| 2585 { Expression *e; | |
| 2586 | |
| 2587 e = specValue; | |
| 2588 if (!e) | |
| 2589 { | |
| 2590 // Create a dummy value | |
| 2591 if (!edummy) | |
| 2592 edummy = valType->defaultInit(); | |
| 2593 e = edummy; | |
| 2594 } | |
| 2595 return (void *)e; | |
| 2596 } | |
| 2597 | |
| 2598 | |
| 2599 Object *TemplateValueParameter::specialization() | |
| 2600 { | |
| 2601 return specValue; | |
| 2602 } | |
| 2603 | |
| 2604 | |
| 2605 Object *TemplateValueParameter::defaultArg(Scope *sc) | |
| 2606 { | |
| 2607 Expression *e = defaultValue; | |
| 2608 if (e) | |
| 2609 { | |
| 2610 e = e->syntaxCopy(); | |
| 2611 e = e->semantic(sc); | |
| 2612 #if DMDV2 | |
| 2613 if (e->op == TOKdefault) | |
| 2614 { DefaultInitExp *de = (DefaultInitExp *)e; | |
| 2615 e = de->resolve(loc, sc); | |
| 2616 } | |
| 2617 #endif | |
| 2618 } | |
| 2619 return e; | |
| 2620 } | |
| 2621 | |
| 2622 /* ======================== TemplateTupleParameter ========================== */ | |
| 2623 | |
| 2624 // variadic-parameter | |
| 2625 | |
| 2626 TemplateTupleParameter::TemplateTupleParameter(Loc loc, Identifier *ident) | |
| 2627 : TemplateParameter(loc, ident) | |
| 2628 { | |
| 2629 this->ident = ident; | |
| 2630 } | |
| 2631 | |
| 2632 TemplateTupleParameter *TemplateTupleParameter::isTemplateTupleParameter() | |
| 2633 { | |
| 2634 return this; | |
| 2635 } | |
| 2636 | |
| 2637 TemplateParameter *TemplateTupleParameter::syntaxCopy() | |
| 2638 { | |
| 2639 TemplateTupleParameter *tp = new TemplateTupleParameter(loc, ident); | |
| 2640 return tp; | |
| 2641 } | |
| 2642 | |
| 2643 void TemplateTupleParameter::declareParameter(Scope *sc) | |
| 2644 { | |
| 2645 TypeIdentifier *ti = new TypeIdentifier(loc, ident); | |
| 2646 sparam = new AliasDeclaration(loc, ident, ti); | |
| 2647 if (!sc->insert(sparam)) | |
| 2648 error(loc, "parameter '%s' multiply defined", ident->toChars()); | |
| 2649 } | |
| 2650 | |
| 2651 void TemplateTupleParameter::semantic(Scope *sc) | |
| 2652 { | |
| 2653 } | |
| 2654 | |
| 2655 int TemplateTupleParameter::overloadMatch(TemplateParameter *tp) | |
| 2656 { | |
| 2657 TemplateTupleParameter *tvp = tp->isTemplateTupleParameter(); | |
| 2658 | |
| 2659 if (tvp) | |
| 2660 { | |
| 2661 return 1; // match | |
| 2662 } | |
| 2663 | |
| 2664 Lnomatch: | |
| 2665 return 0; | |
| 2666 } | |
| 2667 | |
| 2668 MATCH TemplateTupleParameter::matchArg(Scope *sc, | |
| 2669 Objects *tiargs, int i, TemplateParameters *parameters, | |
| 2670 Objects *dedtypes, | |
| 2671 Declaration **psparam) | |
| 2672 { | |
| 2673 //printf("TemplateTupleParameter::matchArg()\n"); | |
| 2674 | |
| 2675 /* The rest of the actual arguments (tiargs[]) form the match | |
| 2676 * for the variadic parameter. | |
| 2677 */ | |
| 2678 assert(i + 1 == dedtypes->dim); // must be the last one | |
| 2679 Tuple *ovar; | |
| 2680 if (i + 1 == tiargs->dim && isTuple((Object *)tiargs->data[i])) | |
| 2681 ovar = isTuple((Object *)tiargs->data[i]); | |
| 2682 else | |
| 2683 { | |
| 2684 ovar = new Tuple(); | |
| 2685 //printf("ovar = %p\n", ovar); | |
| 2686 if (i < tiargs->dim) | |
| 2687 { | |
| 2688 //printf("i = %d, tiargs->dim = %d\n", i, tiargs->dim); | |
| 2689 ovar->objects.setDim(tiargs->dim - i); | |
| 2690 for (size_t j = 0; j < ovar->objects.dim; j++) | |
| 2691 ovar->objects.data[j] = tiargs->data[i + j]; | |
| 2692 } | |
| 2693 } | |
| 2694 *psparam = new TupleDeclaration(loc, ident, &ovar->objects); | |
| 2695 dedtypes->data[i] = (void *)ovar; | |
| 2696 return MATCHexact; | |
| 2697 } | |
| 2698 | |
| 2699 | |
| 2700 void TemplateTupleParameter::print(Object *oarg, Object *oded) | |
| 2701 { | |
| 2702 printf(" %s... [", ident->toChars()); | |
| 2703 Tuple *v = isTuple(oded); | |
| 2704 assert(v); | |
| 2705 | |
| 2706 //printf("|%d| ", v->objects.dim); | |
| 2707 for (int i = 0; i < v->objects.dim; i++) | |
| 2708 { | |
| 2709 if (i) | |
| 2710 printf(", "); | |
| 2711 | |
| 2712 Object *o = (Object *)v->objects.data[i]; | |
| 2713 | |
| 2714 Dsymbol *sa = isDsymbol(o); | |
| 2715 if (sa) | |
| 2716 printf("alias: %s", sa->toChars()); | |
| 2717 | |
| 2718 Type *ta = isType(o); | |
| 2719 if (ta) | |
| 2720 printf("type: %s", ta->toChars()); | |
| 2721 | |
| 2722 Expression *ea = isExpression(o); | |
| 2723 if (ea) | |
| 2724 printf("exp: %s", ea->toChars()); | |
| 2725 | |
| 2726 assert(!isTuple(o)); // no nested Tuple arguments | |
| 2727 } | |
| 2728 | |
| 2729 printf("]\n"); | |
| 2730 } | |
| 2731 | |
| 2732 void TemplateTupleParameter::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2733 { | |
| 2734 buf->writestring(ident->toChars()); | |
| 2735 buf->writestring("..."); | |
| 2736 } | |
| 2737 | |
| 2738 | |
| 2739 void *TemplateTupleParameter::dummyArg() | |
| 2740 { | |
| 2741 return NULL; | |
| 2742 } | |
| 2743 | |
| 2744 | |
| 2745 Object *TemplateTupleParameter::specialization() | |
| 2746 { | |
| 2747 return NULL; | |
| 2748 } | |
| 2749 | |
| 2750 | |
| 2751 Object *TemplateTupleParameter::defaultArg(Scope *sc) | |
| 2752 { | |
| 2753 return NULL; | |
| 2754 } | |
| 2755 | |
| 2756 /* ======================== TemplateInstance ================================ */ | |
| 2757 | |
| 2758 TemplateInstance::TemplateInstance(Loc loc, Identifier *ident) | |
| 2759 : ScopeDsymbol(NULL) | |
| 2760 { | |
| 2761 #if LOG | |
| 2762 printf("TemplateInstance(this = %p, ident = '%s')\n", this, ident ? ident->toChars() : "null"); | |
| 2763 #endif | |
| 2764 this->loc = loc; | |
| 2765 this->name = ident; | |
| 2766 this->tiargs = NULL; | |
| 2767 this->tempdecl = NULL; | |
| 2768 this->inst = NULL; | |
| 2769 this->argsym = NULL; | |
| 2770 this->aliasdecl = NULL; | |
| 2771 this->semanticdone = 0; | |
| 2772 this->semantictiargsdone = 0; | |
| 2773 this->withsym = NULL; | |
| 2774 this->nest = 0; | |
| 2775 this->havetempdecl = 0; | |
| 2776 this->isnested = NULL; | |
| 2777 this->errors = 0; | |
|
561
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
2778 this->tinst = NULL; |
| 336 | 2779 } |
| 2780 | |
| 2781 | |
| 2782 TemplateInstance::TemplateInstance(Loc loc, TemplateDeclaration *td, Objects *tiargs) | |
| 2783 : ScopeDsymbol(NULL) | |
| 2784 { | |
| 2785 #if LOG | |
| 2786 printf("TemplateInstance(this = %p, tempdecl = '%s')\n", this, td->toChars()); | |
| 2787 #endif | |
| 2788 this->loc = loc; | |
| 2789 this->name = td->ident; | |
| 2790 this->tiargs = tiargs; | |
| 2791 this->tempdecl = td; | |
| 2792 this->inst = NULL; | |
| 2793 this->argsym = NULL; | |
| 2794 this->aliasdecl = NULL; | |
| 2795 this->semanticdone = 0; | |
| 2796 this->semantictiargsdone = 1; | |
| 2797 this->withsym = NULL; | |
| 2798 this->nest = 0; | |
| 2799 this->havetempdecl = 1; | |
| 2800 this->isnested = NULL; | |
| 2801 this->errors = 0; | |
|
561
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
2802 this->tinst = NULL; |
| 336 | 2803 |
| 2804 assert((size_t)tempdecl->scope > 0x10000); | |
| 2805 } | |
| 2806 | |
| 2807 | |
| 2808 Objects *TemplateInstance::arraySyntaxCopy(Objects *objs) | |
| 2809 { | |
| 2810 Objects *a = NULL; | |
| 2811 if (objs) | |
| 2812 { a = new Objects(); | |
| 2813 a->setDim(objs->dim); | |
| 2814 for (size_t i = 0; i < objs->dim; i++) | |
| 2815 { | |
| 2816 Type *ta = isType((Object *)objs->data[i]); | |
| 2817 if (ta) | |
| 2818 a->data[i] = ta->syntaxCopy(); | |
| 2819 else | |
| 2820 { | |
| 2821 Expression *ea = isExpression((Object *)objs->data[i]); | |
| 2822 assert(ea); | |
| 2823 a->data[i] = ea->syntaxCopy(); | |
| 2824 } | |
| 2825 } | |
| 2826 } | |
| 2827 return a; | |
| 2828 } | |
| 2829 | |
| 2830 Dsymbol *TemplateInstance::syntaxCopy(Dsymbol *s) | |
| 2831 { | |
| 2832 TemplateInstance *ti; | |
| 2833 int i; | |
| 2834 | |
| 2835 if (s) | |
| 2836 ti = (TemplateInstance *)s; | |
| 2837 else | |
| 2838 ti = new TemplateInstance(loc, name); | |
| 2839 | |
| 2840 ti->tiargs = arraySyntaxCopy(tiargs); | |
| 2841 | |
| 2842 ScopeDsymbol::syntaxCopy(ti); | |
| 2843 return ti; | |
| 2844 } | |
| 2845 | |
| 2846 | |
| 2847 void TemplateInstance::semantic(Scope *sc) | |
| 2848 { | |
| 2849 if (global.errors) | |
| 2850 { | |
| 2851 if (!global.gag) | |
| 2852 { | |
| 2853 /* Trying to soldier on rarely generates useful messages | |
| 2854 * at this point. | |
| 2855 */ | |
| 2856 fatal(); | |
| 2857 } | |
| 2858 return; | |
| 2859 } | |
| 2860 #if LOG | |
| 2861 printf("\n+TemplateInstance::semantic('%s', this=%p)\n", toChars(), this); | |
| 2862 #endif | |
| 2863 if (inst) // if semantic() was already run | |
| 2864 { | |
| 2865 #if LOG | |
| 2866 printf("-TemplateInstance::semantic('%s', this=%p) already run\n", inst->toChars(), inst); | |
| 2867 #endif | |
| 2868 return; | |
| 2869 } | |
| 2870 | |
| 2871 if (semanticdone != 0) | |
| 2872 { | |
| 2873 error(loc, "recursive template expansion"); | |
| 2874 // inst = this; | |
| 2875 return; | |
| 2876 } | |
| 2877 semanticdone = 1; | |
| 2878 | |
|
561
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
2879 // get the enclosing template instance from the scope tinst |
|
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
2880 tinst = sc->tinst; |
|
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
2881 |
| 336 | 2882 #if LOG |
| 2883 printf("\tdo semantic\n"); | |
| 2884 #endif | |
| 2885 if (havetempdecl) | |
| 2886 { | |
| 2887 assert((size_t)tempdecl->scope > 0x10000); | |
| 2888 // Deduce tdtypes | |
| 2889 tdtypes.setDim(tempdecl->parameters->dim); | |
| 2890 if (!tempdecl->matchWithInstance(this, &tdtypes, 0)) | |
| 2891 { | |
| 2892 error("incompatible arguments for template instantiation"); | |
| 2893 inst = this; | |
| 2894 return; | |
| 2895 } | |
| 2896 } | |
| 2897 else | |
| 2898 { | |
| 2899 // Run semantic on each argument, place results in tiargs[] | |
| 2900 semanticTiargs(sc); | |
| 2901 | |
| 2902 tempdecl = findTemplateDeclaration(sc); | |
| 2903 if (tempdecl) | |
| 2904 tempdecl = findBestMatch(sc); | |
| 2905 if (!tempdecl || global.errors) | |
| 2906 { inst = this; | |
| 2907 //printf("error return %p, %d\n", tempdecl, global.errors); | |
| 2908 return; // error recovery | |
| 2909 } | |
| 2910 } | |
| 2911 | |
| 2912 isNested(tiargs); | |
| 2913 | |
| 2914 /* See if there is an existing TemplateInstantiation that already | |
| 2915 * implements the typeargs. If so, just refer to that one instead. | |
| 2916 */ | |
| 2917 | |
| 2918 for (size_t i = 0; i < tempdecl->instances.dim; i++) | |
| 2919 { | |
| 2920 TemplateInstance *ti = (TemplateInstance *)tempdecl->instances.data[i]; | |
| 2921 #if LOG | |
| 2922 printf("\t%s: checking for match with instance %d (%p): '%s'\n", toChars(), i, ti, ti->toChars()); | |
| 2923 #endif | |
| 2924 assert(tdtypes.dim == ti->tdtypes.dim); | |
| 2925 | |
| 2926 // Nesting must match | |
| 2927 if (isnested != ti->isnested) | |
| 2928 continue; | |
| 2929 #if 0 | |
| 2930 if (isnested && sc->parent != ti->parent) | |
| 2931 continue; | |
| 2932 #endif | |
| 2933 for (size_t j = 0; j < tdtypes.dim; j++) | |
| 2934 { Object *o1 = (Object *)tdtypes.data[j]; | |
| 2935 Object *o2 = (Object *)ti->tdtypes.data[j]; | |
| 2936 if (!match(o1, o2, tempdecl, sc)) | |
| 2937 goto L1; | |
| 2938 } | |
| 2939 | |
| 2940 // It's a match | |
| 2941 inst = ti; | |
| 2942 parent = ti->parent; | |
| 2943 #if LOG | |
| 2944 printf("\tit's a match with instance %p\n", inst); | |
| 2945 #endif | |
| 2946 return; | |
| 2947 | |
| 2948 L1: | |
| 2949 ; | |
| 2950 } | |
| 2951 | |
| 2952 /* So, we need to implement 'this' instance. | |
| 2953 */ | |
| 2954 #if LOG | |
| 2955 printf("\timplement template instance '%s'\n", toChars()); | |
| 2956 #endif | |
| 2957 unsigned errorsave = global.errors; | |
| 2958 inst = this; | |
| 2959 int tempdecl_instance_idx = tempdecl->instances.dim; | |
| 2960 tempdecl->instances.push(this); | |
| 2961 parent = tempdecl->parent; | |
| 2962 //printf("parent = '%s'\n", parent->kind()); | |
| 2963 | |
| 2964 ident = genIdent(); // need an identifier for name mangling purposes. | |
| 2965 | |
| 2966 #if 1 | |
| 2967 if (isnested) | |
| 2968 parent = isnested; | |
| 2969 #endif | |
| 2970 //printf("parent = '%s'\n", parent->kind()); | |
| 2971 | |
| 2972 // Add 'this' to the enclosing scope's members[] so the semantic routines | |
| 2973 // will get called on the instance members | |
| 2974 #if 1 | |
| 2975 int dosemantic3 = 0; | |
| 2976 { Array *a; | |
| 2977 int i; | |
| 2978 | |
| 2979 if (sc->scopesym && sc->scopesym->members && !sc->scopesym->isTemplateMixin()) | |
| 2980 { | |
| 2981 //printf("\t1: adding to %s %s\n", sc->scopesym->kind(), sc->scopesym->toChars()); | |
| 2982 a = sc->scopesym->members; | |
| 2983 } | |
| 2984 else | |
| 2985 { Module *m = sc->module->importedFrom; | |
| 2986 //printf("\t2: adding to module %s instead of module %s\n", m->toChars(), sc->module->toChars()); | |
| 2987 a = m->members; | |
| 2988 if (m->semanticdone >= 3) | |
| 2989 dosemantic3 = 1; | |
| 2990 } | |
| 2991 for (int i = 0; 1; i++) | |
| 2992 { | |
| 2993 if (i == a->dim) | |
| 2994 { | |
| 2995 a->push(this); | |
| 2996 break; | |
| 2997 } | |
| 2998 if (this == (Dsymbol *)a->data[i]) // if already in Array | |
| 2999 break; | |
| 3000 } | |
| 3001 } | |
| 3002 #endif | |
| 3003 | |
| 3004 // Copy the syntax trees from the TemplateDeclaration | |
| 3005 members = Dsymbol::arraySyntaxCopy(tempdecl->members); | |
| 3006 | |
| 3007 // Create our own scope for the template parameters | |
| 3008 Scope *scope = tempdecl->scope; | |
| 3009 if (!scope) | |
| 3010 { | |
| 3011 error("forward reference to template declaration %s\n", tempdecl->toChars()); | |
| 3012 return; | |
| 3013 } | |
| 3014 | |
| 3015 #if LOG | |
| 3016 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
| 3017 #endif | |
| 3018 argsym = new ScopeDsymbol(); | |
| 3019 argsym->parent = scope->parent; | |
| 3020 scope = scope->push(argsym); | |
| 3021 | |
| 3022 // Declare each template parameter as an alias for the argument type | |
| 3023 declareParameters(scope); | |
| 3024 | |
| 3025 // Add members of template instance to template instance symbol table | |
| 3026 // parent = scope->scopesym; | |
| 3027 symtab = new DsymbolTable(); | |
| 3028 int memnum = 0; | |
| 3029 for (int i = 0; i < members->dim; i++) | |
| 3030 { | |
| 3031 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3032 #if LOG | |
| 3033 printf("\t[%d] adding member '%s' %p kind %s to '%s', memnum = %d\n", i, s->toChars(), s, s->kind(), this->toChars(), memnum); | |
| 3034 #endif | |
| 3035 memnum |= s->addMember(scope, this, memnum); | |
| 3036 } | |
| 3037 #if LOG | |
| 3038 printf("adding members done\n"); | |
| 3039 #endif | |
| 3040 | |
| 3041 /* See if there is only one member of template instance, and that | |
| 3042 * member has the same name as the template instance. | |
| 3043 * If so, this template instance becomes an alias for that member. | |
| 3044 */ | |
| 3045 //printf("members->dim = %d\n", members->dim); | |
| 3046 if (members->dim) | |
| 3047 { | |
| 3048 Dsymbol *s; | |
| 3049 if (Dsymbol::oneMembers(members, &s) && s) | |
| 3050 { | |
| 3051 //printf("s->kind = '%s'\n", s->kind()); | |
| 3052 //s->print(); | |
| 3053 //printf("'%s', '%s'\n", s->ident->toChars(), tempdecl->ident->toChars()); | |
| 3054 if (s->ident && s->ident->equals(tempdecl->ident)) | |
| 3055 { | |
| 3056 //printf("setting aliasdecl\n"); | |
| 3057 aliasdecl = new AliasDeclaration(loc, s->ident, s); | |
| 3058 } | |
| 3059 } | |
| 3060 } | |
| 3061 | |
| 3062 // Do semantic() analysis on template instance members | |
| 3063 #if LOG | |
| 3064 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
| 3065 #endif | |
| 3066 Scope *sc2; | |
| 3067 sc2 = scope->push(this); | |
| 3068 //printf("isnested = %d, sc->parent = %s\n", isnested, sc->parent->toChars()); | |
| 3069 sc2->parent = /*isnested ? sc->parent :*/ this; | |
|
561
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
3070 sc2->tinst = this; |
| 336 | 3071 |
| 3072 #if !IN_LLVM | |
| 3073 #if _WIN32 | |
| 3074 __try | |
| 3075 { | |
| 3076 #endif | |
| 3077 #endif | |
| 3078 for (int i = 0; i < members->dim; i++) | |
| 3079 { | |
| 3080 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3081 //printf("\t[%d] semantic on '%s' %p kind %s in '%s'\n", i, s->toChars(), s, s->kind(), this->toChars()); | |
| 3082 //printf("test: isnested = %d, sc2->parent = %s\n", isnested, sc2->parent->toChars()); | |
| 3083 // if (isnested) | |
| 3084 // s->parent = sc->parent; | |
| 3085 //printf("test3: isnested = %d, s->parent = %s\n", isnested, s->parent->toChars()); | |
| 3086 s->semantic(sc2); | |
| 3087 //printf("test4: isnested = %d, s->parent = %s\n", isnested, s->parent->toChars()); | |
| 3088 sc2->module->runDeferredSemantic(); | |
| 3089 } | |
| 3090 #if !IN_LLVM | |
| 3091 #if _WIN32 | |
| 3092 } | |
| 3093 __except (__ehfilter(GetExceptionInformation())) | |
| 3094 { | |
| 3095 global.gag = 0; // ensure error message gets printed | |
| 3096 error("recursive expansion"); | |
| 3097 fatal(); | |
| 3098 } | |
| 3099 #endif | |
| 3100 #endif | |
| 3101 | |
| 3102 /* If any of the instantiation members didn't get semantic() run | |
| 3103 * on them due to forward references, we cannot run semantic2() | |
| 3104 * or semantic3() yet. | |
| 3105 */ | |
| 3106 for (size_t i = 0; i < Module::deferred.dim; i++) | |
| 3107 { Dsymbol *sd = (Dsymbol *)Module::deferred.data[i]; | |
| 3108 | |
| 3109 if (sd->parent == this) | |
| 3110 goto Laftersemantic; | |
| 3111 } | |
| 3112 | |
| 3113 /* The problem is when to parse the initializer for a variable. | |
| 3114 * Perhaps VarDeclaration::semantic() should do it like it does | |
| 3115 * for initializers inside a function. | |
| 3116 */ | |
| 3117 // if (sc->parent->isFuncDeclaration()) | |
| 3118 | |
| 3119 /* BUG 782: this has problems if the classes this depends on | |
| 3120 * are forward referenced. Find a way to defer semantic() | |
| 3121 * on this template. | |
| 3122 */ | |
| 3123 semantic2(sc2); | |
| 3124 | |
| 3125 if (sc->func || dosemantic3) | |
| 3126 { | |
| 3127 semantic3(sc2); | |
| 3128 } | |
| 3129 | |
| 3130 Laftersemantic: | |
| 3131 sc2->pop(); | |
| 3132 | |
| 3133 scope->pop(); | |
| 3134 | |
| 3135 // Give additional context info if error occurred during instantiation | |
| 3136 if (global.errors != errorsave) | |
| 3137 { | |
| 3138 error("error instantiating"); | |
|
561
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
3139 if(tinst) |
|
d4e95db0e62b
Introducing template instantiation traces for static asserts and errors within templates.
Christian Kamm <kamm incasoftware de>
parents:
527
diff
changeset
|
3140 tinst->printInstantiationTrace(); |
| 336 | 3141 errors = 1; |
| 3142 if (global.gag) | |
| 3143 tempdecl->instances.remove(tempdecl_instance_idx); | |
| 3144 } | |
| 3145 | |
| 3146 #if LOG | |
| 3147 printf("-TemplateInstance::semantic('%s', this=%p)\n", toChars(), this); | |
| 3148 #endif | |
| 3149 } | |
| 3150 | |
| 3151 | |
| 3152 void TemplateInstance::semanticTiargs(Scope *sc) | |
| 3153 { | |
| 3154 //printf("+TemplateInstance::semanticTiargs() %s\n", toChars()); | |
| 3155 if (semantictiargsdone) | |
| 3156 return; | |
| 3157 semantictiargsdone = 1; | |
| 3158 semanticTiargs(loc, sc, tiargs); | |
| 3159 } | |
| 3160 | |
| 3161 void TemplateInstance::semanticTiargs(Loc loc, Scope *sc, Objects *tiargs) | |
| 3162 { | |
| 3163 // Run semantic on each argument, place results in tiargs[] | |
| 3164 //printf("+TemplateInstance::semanticTiargs() %s\n", toChars()); | |
| 3165 if (!tiargs) | |
| 3166 return; | |
| 3167 for (size_t j = 0; j < tiargs->dim; j++) | |
| 3168 { | |
| 3169 Object *o = (Object *)tiargs->data[j]; | |
| 3170 Type *ta = isType(o); | |
| 3171 Expression *ea = isExpression(o); | |
| 3172 Dsymbol *sa = isDsymbol(o); | |
| 3173 | |
| 3174 //printf("1: tiargs->data[%d] = %p, %p, %p, ea=%p, ta=%p\n", j, o, isDsymbol(o), isTuple(o), ea, ta); | |
| 3175 if (ta) | |
| 3176 { | |
| 3177 //printf("type %s\n", ta->toChars()); | |
| 3178 // It might really be an Expression or an Alias | |
| 3179 ta->resolve(loc, sc, &ea, &ta, &sa); | |
| 3180 if (ea) | |
| 3181 { | |
| 3182 ea = ea->semantic(sc); | |
| 3183 ea = ea->optimize(WANTvalue | WANTinterpret); | |
| 3184 tiargs->data[j] = ea; | |
| 3185 } | |
| 3186 else if (sa) | |
| 3187 { tiargs->data[j] = sa; | |
| 3188 TupleDeclaration *d = sa->toAlias()->isTupleDeclaration(); | |
| 3189 if (d) | |
| 3190 { | |
| 3191 size_t dim = d->objects->dim; | |
| 3192 tiargs->remove(j); | |
| 3193 tiargs->insert(j, d->objects); | |
| 3194 j--; | |
| 3195 } | |
| 3196 } | |
| 3197 else if (ta) | |
| 3198 { | |
| 3199 if (ta->ty == Ttuple) | |
| 3200 { // Expand tuple | |
| 3201 TypeTuple *tt = (TypeTuple *)ta; | |
| 3202 size_t dim = tt->arguments->dim; | |
| 3203 tiargs->remove(j); | |
| 3204 if (dim) | |
| 3205 { tiargs->reserve(dim); | |
| 3206 for (size_t i = 0; i < dim; i++) | |
| 3207 { Argument *arg = (Argument *)tt->arguments->data[i]; | |
| 3208 tiargs->insert(j + i, arg->type); | |
| 3209 } | |
| 3210 } | |
| 3211 j--; | |
| 3212 } | |
| 3213 else | |
| 3214 tiargs->data[j] = ta; | |
| 3215 } | |
| 3216 else | |
| 3217 { | |
| 3218 assert(global.errors); | |
| 3219 tiargs->data[j] = Type::terror; | |
| 3220 } | |
| 3221 } | |
| 3222 else if (ea) | |
| 3223 { | |
| 3224 if (!ea) | |
| 3225 { assert(global.errors); | |
| 3226 ea = new IntegerExp(0); | |
| 3227 } | |
| 3228 assert(ea); | |
| 3229 ea = ea->semantic(sc); | |
| 3230 ea = ea->optimize(WANTvalue | WANTinterpret); | |
| 3231 tiargs->data[j] = ea; | |
| 3232 if (ea->op == TOKtype) | |
| 3233 tiargs->data[j] = ea->type; | |
| 3234 } | |
| 3235 else if (sa) | |
| 3236 { | |
| 3237 } | |
| 3238 else | |
| 3239 { | |
| 3240 assert(0); | |
| 3241 } | |
| 3242 //printf("1: tiargs->data[%d] = %p\n", j, tiargs->data[j]); | |
| 3243 } | |
| 3244 #if 0 | |
| 3245 printf("-TemplateInstance::semanticTiargs('%s', this=%p)\n", toChars(), this); | |
| 3246 for (size_t j = 0; j < tiargs->dim; j++) | |
| 3247 { | |
| 3248 Object *o = (Object *)tiargs->data[j]; | |
| 3249 Type *ta = isType(o); | |
| 3250 Expression *ea = isExpression(o); | |
| 3251 Dsymbol *sa = isDsymbol(o); | |
| 3252 Tuple *va = isTuple(o); | |
| 3253 | |
| 3254 printf("\ttiargs[%d] = ta %p, ea %p, sa %p, va %p\n", j, ta, ea, sa, va); | |
| 3255 } | |
| 3256 #endif | |
| 3257 } | |
| 3258 | |
| 3259 /********************************************** | |
| 3260 * Find template declaration corresponding to template instance. | |
| 3261 */ | |
| 3262 | |
| 3263 TemplateDeclaration *TemplateInstance::findTemplateDeclaration(Scope *sc) | |
| 3264 { | |
| 3265 //printf("TemplateInstance::findTemplateDeclaration() %s\n", toChars()); | |
| 3266 if (!tempdecl) | |
| 3267 { | |
| 3268 /* Given: | |
| 3269 * foo!( ... ) | |
| 3270 * figure out which TemplateDeclaration foo refers to. | |
| 3271 */ | |
| 3272 Dsymbol *s; | |
| 3273 Dsymbol *scopesym; | |
| 3274 Identifier *id; | |
| 3275 int i; | |
| 3276 | |
| 3277 id = name; | |
| 3278 s = sc->search(loc, id, &scopesym); | |
| 3279 if (!s) | |
| 3280 { error("identifier '%s' is not defined", id->toChars()); | |
| 3281 return NULL; | |
| 3282 } | |
| 3283 #if LOG | |
| 3284 printf("It's an instance of '%s' kind '%s'\n", s->toChars(), s->kind()); | |
| 3285 if (s->parent) | |
| 3286 printf("s->parent = '%s'\n", s->parent->toChars()); | |
| 3287 #endif | |
| 3288 withsym = scopesym->isWithScopeSymbol(); | |
| 3289 | |
| 3290 /* We might have found an alias within a template when | |
| 3291 * we really want the template. | |
| 3292 */ | |
| 3293 TemplateInstance *ti; | |
| 3294 if (s->parent && | |
| 3295 (ti = s->parent->isTemplateInstance()) != NULL) | |
| 3296 { | |
| 3297 if ( | |
| 3298 (ti->name == id || | |
| 3299 ti->toAlias()->ident == id) | |
| 3300 && | |
| 3301 ti->tempdecl) | |
| 3302 { | |
| 3303 /* This is so that one can refer to the enclosing | |
| 3304 * template, even if it has the same name as a member | |
| 3305 * of the template, if it has a !(arguments) | |
| 3306 */ | |
| 3307 tempdecl = ti->tempdecl; | |
| 3308 if (tempdecl->overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 3309 tempdecl = tempdecl->overroot; // then get the start | |
| 3310 s = tempdecl; | |
| 3311 } | |
| 3312 } | |
| 3313 | |
| 3314 s = s->toAlias(); | |
| 3315 | |
| 3316 /* It should be a TemplateDeclaration, not some other symbol | |
| 3317 */ | |
| 3318 tempdecl = s->isTemplateDeclaration(); | |
| 3319 if (!tempdecl) | |
| 3320 { | |
| 3321 if (!s->parent && global.errors) | |
| 3322 return NULL; | |
| 3323 if (!s->parent && s->getType()) | |
| 3324 { Dsymbol *s2 = s->getType()->toDsymbol(sc); | |
| 3325 if (!s2) | |
| 3326 { | |
| 3327 error("%s is not a template declaration, it is a %s", id->toChars(), s->kind()); | |
| 3328 return NULL; | |
| 3329 } | |
| 3330 s = s2; | |
| 3331 } | |
| 3332 #ifdef DEBUG | |
| 3333 //if (!s->parent) printf("s = %s %s\n", s->kind(), s->toChars()); | |
| 3334 #endif | |
| 3335 //assert(s->parent); | |
| 3336 TemplateInstance *ti = s->parent ? s->parent->isTemplateInstance() : NULL; | |
| 3337 if (ti && | |
| 3338 (ti->name == id || | |
| 3339 ti->toAlias()->ident == id) | |
| 3340 && | |
| 3341 ti->tempdecl) | |
| 3342 { | |
| 3343 /* This is so that one can refer to the enclosing | |
| 3344 * template, even if it has the same name as a member | |
| 3345 * of the template, if it has a !(arguments) | |
| 3346 */ | |
| 3347 tempdecl = ti->tempdecl; | |
| 3348 if (tempdecl->overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 3349 tempdecl = tempdecl->overroot; // then get the start | |
| 3350 } | |
| 3351 else | |
| 3352 { | |
| 3353 error("%s is not a template declaration, it is a %s", id->toChars(), s->kind()); | |
| 3354 return NULL; | |
| 3355 } | |
| 3356 } | |
| 3357 } | |
| 3358 else | |
| 3359 assert(tempdecl->isTemplateDeclaration()); | |
| 3360 return tempdecl; | |
| 3361 } | |
| 3362 | |
| 3363 TemplateDeclaration *TemplateInstance::findBestMatch(Scope *sc) | |
| 3364 { | |
| 3365 /* Since there can be multiple TemplateDeclaration's with the same | |
| 3366 * name, look for the best match. | |
| 3367 */ | |
| 3368 TemplateDeclaration *td_ambig = NULL; | |
| 3369 TemplateDeclaration *td_best = NULL; | |
| 3370 MATCH m_best = MATCHnomatch; | |
| 3371 Objects dedtypes; | |
| 3372 | |
| 3373 #if LOG | |
| 3374 printf("TemplateInstance::findBestMatch()\n"); | |
| 3375 #endif | |
| 3376 for (TemplateDeclaration *td = tempdecl; td; td = td->overnext) | |
| 3377 { | |
| 3378 MATCH m; | |
| 3379 | |
| 3380 //if (tiargs->dim) printf("2: tiargs->dim = %d, data[0] = %p\n", tiargs->dim, tiargs->data[0]); | |
| 3381 | |
| 3382 // If more arguments than parameters, | |
| 3383 // then this is no match. | |
| 3384 if (td->parameters->dim < tiargs->dim) | |
| 3385 { | |
| 3386 if (!td->isVariadic()) | |
| 3387 continue; | |
| 3388 } | |
| 3389 | |
| 3390 dedtypes.setDim(td->parameters->dim); | |
| 3391 dedtypes.zero(); | |
| 3392 if (!td->scope) | |
| 3393 { | |
| 3394 error("forward reference to template declaration %s", td->toChars()); | |
| 3395 return NULL; | |
| 3396 } | |
| 3397 m = td->matchWithInstance(this, &dedtypes, 0); | |
| 3398 //printf("m = %d\n", m); | |
| 3399 if (!m) // no match at all | |
| 3400 continue; | |
| 3401 | |
| 3402 #if 1 | |
| 3403 if (m < m_best) | |
| 3404 goto Ltd_best; | |
| 3405 if (m > m_best) | |
| 3406 goto Ltd; | |
| 3407 #else | |
| 3408 if (!m_best) | |
| 3409 goto Ltd; | |
| 3410 #endif | |
| 3411 { | |
| 3412 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 3413 int c1 = td->leastAsSpecialized(td_best); | |
| 3414 int c2 = td_best->leastAsSpecialized(td); | |
| 3415 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 3416 | |
| 3417 if (c1 > c2) | |
| 3418 goto Ltd; | |
| 3419 else if (c1 < c2) | |
| 3420 goto Ltd_best; | |
| 3421 else | |
| 3422 goto Lambig; | |
| 3423 } | |
| 3424 | |
| 3425 Lambig: // td_best and td are ambiguous | |
| 3426 td_ambig = td; | |
| 3427 continue; | |
| 3428 | |
| 3429 Ltd_best: // td_best is the best match so far | |
| 3430 td_ambig = NULL; | |
| 3431 continue; | |
| 3432 | |
| 3433 Ltd: // td is the new best match | |
| 3434 td_ambig = NULL; | |
| 3435 td_best = td; | |
| 3436 m_best = m; | |
| 3437 tdtypes.setDim(dedtypes.dim); | |
| 3438 memcpy(tdtypes.data, dedtypes.data, tdtypes.dim * sizeof(void *)); | |
| 3439 continue; | |
| 3440 } | |
| 3441 | |
| 3442 if (!td_best) | |
| 3443 { | |
| 3444 error("%s does not match any template declaration", toChars()); | |
| 3445 return NULL; | |
| 3446 } | |
| 3447 if (td_ambig) | |
| 3448 { | |
| 3449 error("%s matches more than one template declaration, %s and %s", | |
| 3450 toChars(), td_best->toChars(), td_ambig->toChars()); | |
| 3451 } | |
| 3452 | |
| 3453 /* The best match is td_best | |
| 3454 */ | |
| 3455 tempdecl = td_best; | |
| 3456 | |
| 3457 #if 0 | |
| 3458 /* Cast any value arguments to be same type as value parameter | |
| 3459 */ | |
| 3460 for (size_t i = 0; i < tiargs->dim; i++) | |
| 3461 { Object *o = (Object *)tiargs->data[i]; | |
| 3462 Expression *ea = isExpression(o); // value argument | |
| 3463 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
| 3464 assert(tp); | |
| 3465 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 3466 if (tvp) | |
| 3467 { | |
| 3468 assert(ea); | |
| 3469 ea = ea->castTo(tvp->valType); | |
| 3470 ea = ea->optimize(WANTvalue | WANTinterpret); | |
| 3471 tiargs->data[i] = (Object *)ea; | |
| 3472 } | |
| 3473 } | |
| 3474 #endif | |
| 3475 | |
| 3476 #if LOG | |
| 3477 printf("\tIt's a match with template declaration '%s'\n", tempdecl->toChars()); | |
| 3478 #endif | |
| 3479 return tempdecl; | |
| 3480 } | |
| 3481 | |
| 3482 | |
| 3483 /***************************************** | |
| 3484 * Determines if a TemplateInstance will need a nested | |
| 3485 * generation of the TemplateDeclaration. | |
| 3486 */ | |
| 3487 | |
| 3488 int TemplateInstance::isNested(Objects *args) | |
| 3489 { int nested = 0; | |
| 3490 //printf("TemplateInstance::isNested('%s')\n", tempdecl->ident->toChars()); | |
| 3491 | |
| 3492 /* A nested instance happens when an argument references a local | |
| 3493 * symbol that is on the stack. | |
| 3494 */ | |
| 3495 for (size_t i = 0; i < args->dim; i++) | |
| 3496 { Object *o = (Object *)args->data[i]; | |
| 3497 Expression *ea = isExpression(o); | |
| 3498 Dsymbol *sa = isDsymbol(o); | |
| 3499 Tuple *va = isTuple(o); | |
| 3500 if (ea) | |
| 3501 { | |
| 3502 if (ea->op == TOKvar) | |
| 3503 { | |
| 3504 sa = ((VarExp *)ea)->var; | |
| 3505 goto Lsa; | |
| 3506 } | |
| 3507 if (ea->op == TOKfunction) | |
| 3508 { | |
| 3509 sa = ((FuncExp *)ea)->fd; | |
| 3510 goto Lsa; | |
| 3511 } | |
| 3512 } | |
| 3513 else if (sa) | |
| 3514 { | |
| 3515 Lsa: | |
| 3516 Declaration *d = sa->isDeclaration(); | |
| 3517 if (d && !d->isDataseg() && | |
| 3518 #if DMDV2 | |
| 3519 !(d->storage_class & STCmanifest) && | |
| 3520 #endif | |
| 3521 (!d->isFuncDeclaration() || d->isFuncDeclaration()->isNested()) && | |
| 3522 !isTemplateMixin()) | |
| 3523 { | |
| 3524 // if module level template | |
| 3525 if (tempdecl->toParent()->isModule()) | |
| 3526 { Dsymbol *dparent = d->toParent(); | |
| 3527 if (!isnested) | |
| 3528 isnested = dparent; | |
| 3529 else if (isnested != dparent) | |
| 3530 { | |
| 3531 /* Select the more deeply nested of the two. | |
| 3532 * Error if one is not nested inside the other. | |
| 3533 */ | |
| 3534 for (Dsymbol *p = isnested; p; p = p->parent) | |
| 3535 { | |
| 3536 if (p == dparent) | |
| 3537 goto L1; // isnested is most nested | |
| 3538 } | |
| 3539 for (Dsymbol *p = dparent; 1; p = p->parent) | |
| 3540 { | |
| 3541 if (p == isnested) | |
| 3542 { isnested = dparent; | |
| 3543 goto L1; // dparent is most nested | |
| 3544 } | |
| 3545 } | |
| 3546 error("is nested in both %s and %s", isnested->toChars(), dparent->toChars()); | |
| 3547 } | |
| 3548 L1: | |
| 3549 //printf("\tnested inside %s\n", isnested->toChars()); | |
| 3550 nested |= 1; | |
| 3551 } | |
| 3552 else | |
| 3553 error("cannot use local '%s' as template parameter", d->toChars()); | |
| 3554 } | |
| 3555 } | |
| 3556 else if (va) | |
| 3557 { | |
| 3558 nested |= isNested(&va->objects); | |
| 3559 } | |
| 3560 } | |
| 3561 return nested; | |
| 3562 } | |
| 3563 | |
| 3564 /**************************************** | |
| 3565 * This instance needs an identifier for name mangling purposes. | |
| 3566 * Create one by taking the template declaration name and adding | |
| 3567 * the type signature for it. | |
| 3568 */ | |
| 3569 | |
| 3570 Identifier *TemplateInstance::genIdent() | |
| 3571 { OutBuffer buf; | |
| 3572 char *id; | |
| 3573 Objects *args; | |
| 3574 | |
| 3575 //printf("TemplateInstance::genIdent('%s')\n", tempdecl->ident->toChars()); | |
| 3576 id = tempdecl->ident->toChars(); | |
| 3577 buf.printf("__T%"PRIuSIZE"%s", strlen(id), id); | |
| 3578 args = tiargs; | |
| 3579 for (int i = 0; i < args->dim; i++) | |
| 3580 { Object *o = (Object *)args->data[i]; | |
| 3581 Type *ta = isType(o); | |
| 3582 Expression *ea = isExpression(o); | |
| 3583 Dsymbol *sa = isDsymbol(o); | |
| 3584 Tuple *va = isTuple(o); | |
| 3585 //printf("\to %p ta %p ea %p sa %p va %p\n", o, ta, ea, sa, va); | |
| 3586 if (ta) | |
| 3587 { | |
| 3588 buf.writeByte('T'); | |
| 3589 if (ta->deco) | |
| 3590 buf.writestring(ta->deco); | |
| 3591 else | |
| 3592 { | |
| 3593 #ifdef DEBUG | |
| 3594 printf("ta = %d, %s\n", ta->ty, ta->toChars()); | |
| 3595 #endif | |
| 3596 assert(global.errors); | |
| 3597 } | |
| 3598 } | |
| 3599 else if (ea) | |
| 3600 { sinteger_t v; | |
| 3601 real_t r; | |
| 3602 | |
| 3603 if (ea->op == TOKvar) | |
| 3604 { | |
| 3605 sa = ((VarExp *)ea)->var; | |
| 3606 ea = NULL; | |
| 3607 goto Lsa; | |
| 3608 } | |
| 3609 if (ea->op == TOKfunction) | |
| 3610 { | |
| 3611 sa = ((FuncExp *)ea)->fd; | |
| 3612 ea = NULL; | |
| 3613 goto Lsa; | |
| 3614 } | |
| 3615 buf.writeByte('V'); | |
| 3616 if (ea->op == TOKtuple) | |
| 3617 { ea->error("tuple is not a valid template value argument"); | |
| 3618 continue; | |
| 3619 } | |
| 3620 #if 1 | |
| 3621 /* Use deco that matches what it would be for a function parameter | |
| 3622 */ | |
| 3623 buf.writestring(ea->type->deco); | |
| 3624 #else | |
| 3625 // Use type of parameter, not type of argument | |
| 3626 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
| 3627 assert(tp); | |
| 3628 TemplateValueParameter *tvp = tp->isTemplateValueParameter(); | |
| 3629 assert(tvp); | |
| 3630 buf.writestring(tvp->valType->deco); | |
| 3631 #endif | |
| 3632 ea->toMangleBuffer(&buf); | |
| 3633 } | |
| 3634 else if (sa) | |
| 3635 { | |
| 3636 Lsa: | |
| 3637 buf.writeByte('S'); | |
| 3638 Declaration *d = sa->isDeclaration(); | |
| 3639 if (d && !d->type->deco) | |
| 3640 error("forward reference of %s", d->toChars()); | |
| 3641 else | |
| 3642 { | |
| 3643 char *p = sa->mangle(); | |
| 3644 buf.printf("%"PRIuSIZE"%s", strlen(p), p); | |
| 3645 } | |
| 3646 } | |
| 3647 else if (va) | |
| 3648 { | |
| 3649 assert(i + 1 == args->dim); // must be last one | |
| 3650 args = &va->objects; | |
| 3651 i = -1; | |
| 3652 } | |
| 3653 else | |
| 3654 assert(0); | |
| 3655 } | |
| 3656 buf.writeByte('Z'); | |
| 3657 id = buf.toChars(); | |
| 3658 buf.data = NULL; | |
| 3659 return new Identifier(id, TOKidentifier); | |
| 3660 } | |
| 3661 | |
| 3662 | |
| 3663 /**************************************************** | |
| 3664 * Declare parameters of template instance, initialize them with the | |
| 3665 * template instance arguments. | |
| 3666 */ | |
| 3667 | |
| 3668 void TemplateInstance::declareParameters(Scope *scope) | |
| 3669 { | |
| 3670 //printf("TemplateInstance::declareParameters()\n"); | |
| 3671 for (int i = 0; i < tdtypes.dim; i++) | |
| 3672 { | |
| 3673 TemplateParameter *tp = (TemplateParameter *)tempdecl->parameters->data[i]; | |
| 3674 //Object *o = (Object *)tiargs->data[i]; | |
| 3675 Object *o = (Object *)tdtypes.data[i]; | |
| 3676 | |
| 3677 //printf("\ttdtypes[%d] = %p\n", i, o); | |
| 3678 tempdecl->declareParameter(scope, tp, o); | |
| 3679 } | |
| 3680 } | |
| 3681 | |
| 3682 | |
| 3683 void TemplateInstance::semantic2(Scope *sc) | |
| 3684 { int i; | |
| 3685 | |
| 3686 if (semanticdone >= 2) | |
| 3687 return; | |
| 3688 semanticdone = 2; | |
| 3689 #if LOG | |
| 3690 printf("+TemplateInstance::semantic2('%s')\n", toChars()); | |
| 3691 #endif | |
| 3692 if (!errors && members) | |
| 3693 { | |
| 3694 sc = tempdecl->scope; | |
| 3695 assert(sc); | |
| 3696 sc = sc->push(argsym); | |
| 3697 sc = sc->push(this); | |
|
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|
3698 sc->tinst = this; |
| 336 | 3699 for (i = 0; i < members->dim; i++) |
| 3700 { | |
| 3701 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3702 #if LOG | |
| 3703 printf("\tmember '%s', kind = '%s'\n", s->toChars(), s->kind()); | |
| 3704 #endif | |
| 3705 s->semantic2(sc); | |
| 3706 } | |
| 3707 sc = sc->pop(); | |
| 3708 sc->pop(); | |
| 3709 } | |
| 3710 #if LOG | |
| 3711 printf("-TemplateInstance::semantic2('%s')\n", toChars()); | |
| 3712 #endif | |
| 3713 } | |
| 3714 | |
| 3715 void TemplateInstance::semantic3(Scope *sc) | |
| 3716 { | |
| 3717 #if LOG | |
| 3718 printf("TemplateInstance::semantic3('%s'), semanticdone = %d\n", toChars(), semanticdone); | |
| 3719 #endif | |
| 3720 //if (toChars()[0] == 'D') *(char*)0=0; | |
| 3721 if (semanticdone >= 3) | |
| 3722 return; | |
| 3723 semanticdone = 3; | |
| 3724 if (!errors && members) | |
| 3725 { | |
| 3726 sc = tempdecl->scope; | |
| 3727 sc = sc->push(argsym); | |
| 3728 sc = sc->push(this); | |
|
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|
3729 sc->tinst = this; |
| 336 | 3730 for (int i = 0; i < members->dim; i++) |
| 3731 { | |
| 3732 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3733 s->semantic3(sc); | |
| 3734 } | |
| 3735 sc = sc->pop(); | |
| 3736 sc->pop(); | |
| 3737 } | |
| 3738 } | |
| 3739 | |
| 3740 void TemplateInstance::toObjFile(int multiobj) | |
| 3741 { | |
| 3742 #if LOG | |
| 3743 printf("TemplateInstance::toObjFile('%s', this = %p)\n", toChars(), this); | |
| 3744 #endif | |
| 3745 if (!errors && members) | |
| 3746 { | |
| 3747 if (multiobj) | |
| 3748 // Append to list of object files to be written later | |
| 3749 //obj_append(this); | |
| 3750 assert(0 && "multiobj"); | |
| 3751 else | |
| 3752 { | |
| 3753 for (int i = 0; i < members->dim; i++) | |
| 3754 { | |
| 3755 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3756 s->toObjFile(multiobj); | |
| 3757 } | |
| 3758 } | |
| 3759 } | |
| 3760 } | |
| 3761 | |
| 3762 void TemplateInstance::inlineScan() | |
| 3763 { | |
| 3764 #if LOG | |
| 3765 printf("TemplateInstance::inlineScan('%s')\n", toChars()); | |
| 3766 #endif | |
| 3767 if (!errors && members) | |
| 3768 { | |
| 3769 for (int i = 0; i < members->dim; i++) | |
| 3770 { | |
| 3771 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 3772 s->inlineScan(); | |
| 3773 } | |
| 3774 } | |
| 3775 } | |
| 3776 | |
| 3777 void TemplateInstance::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3778 { | |
| 3779 int i; | |
| 3780 | |
| 3781 Identifier *id = name; | |
| 3782 buf->writestring(id->toChars()); | |
| 3783 buf->writestring("!("); | |
| 3784 if (nest) | |
| 3785 buf->writestring("..."); | |
| 3786 else | |
| 3787 { | |
| 3788 nest++; | |
| 3789 Objects *args = tiargs; | |
| 3790 for (i = 0; i < args->dim; i++) | |
| 3791 { | |
| 3792 if (i) | |
| 3793 buf->writeByte(','); | |
| 3794 Object *oarg = (Object *)args->data[i]; | |
| 3795 ObjectToCBuffer(buf, hgs, oarg); | |
| 3796 } | |
| 3797 nest--; | |
| 3798 } | |
| 3799 buf->writeByte(')'); | |
| 3800 } | |
| 3801 | |
| 3802 | |
| 3803 Dsymbol *TemplateInstance::toAlias() | |
| 3804 { | |
| 3805 #if LOG | |
| 3806 printf("TemplateInstance::toAlias()\n"); | |
| 3807 #endif | |
| 3808 if (!inst) | |
| 3809 { error("cannot resolve forward reference"); | |
| 3810 return this; | |
| 3811 } | |
| 3812 | |
| 3813 if (inst != this) | |
| 3814 return inst->toAlias(); | |
| 3815 | |
| 3816 if (aliasdecl) | |
| 3817 return aliasdecl->toAlias(); | |
| 3818 | |
| 3819 return inst; | |
| 3820 } | |
| 3821 | |
| 3822 AliasDeclaration *TemplateInstance::isAliasDeclaration() | |
| 3823 { | |
| 3824 return aliasdecl; | |
| 3825 } | |
| 3826 | |
| 3827 const char *TemplateInstance::kind() | |
| 3828 { | |
| 3829 return "template instance"; | |
| 3830 } | |
| 3831 | |
| 3832 int TemplateInstance::oneMember(Dsymbol **ps) | |
| 3833 { | |
| 3834 *ps = NULL; | |
| 3835 return TRUE; | |
| 3836 } | |
| 3837 | |
| 3838 char *TemplateInstance::toChars() | |
| 3839 { | |
| 3840 OutBuffer buf; | |
| 3841 HdrGenState hgs; | |
| 3842 char *s; | |
| 3843 | |
| 3844 toCBuffer(&buf, &hgs); | |
| 3845 s = buf.toChars(); | |
| 3846 buf.data = NULL; | |
| 3847 return s; | |
| 3848 } | |
| 3849 | |
|
561
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|
3850 void TemplateInstance::printInstantiationTrace() |
|
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|
3851 { |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
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|
3852 if(global.gag) |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3853 return; |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
changeset
|
3854 |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
changeset
|
3855 const int max_shown = 6; |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3856 |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
changeset
|
3857 // determine instantiation depth |
|
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|
3858 int n_instantiations = 1; |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3859 TemplateInstance* cur = this; |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
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|
3860 while(cur = cur->tinst) |
|
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|
3861 ++n_instantiations; |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3862 |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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diff
changeset
|
3863 // show full trace only if it's short or verbose is on |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3864 if(n_instantiations <= max_shown || global.params.verbose) |
|
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|
3865 { |
|
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|
3866 cur = this; |
|
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|
3867 while(cur) |
|
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|
3868 { |
|
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|
3869 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); |
|
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|
3870 cur = cur->tinst; |
|
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|
3871 } |
|
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|
3872 } |
|
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|
3873 else |
|
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|
3874 { |
|
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diff
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|
3875 cur = this; |
|
d4e95db0e62b
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|
3876 size_t i = 0; |
|
d4e95db0e62b
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|
3877 for(; i < max_shown/2; ++i, cur = cur->tinst) |
|
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|
3878 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); |
|
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|
3879 fprintf(stdmsg," ... (%d instantiations, -v to show) ...\n", n_instantiations - max_shown); |
|
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|
3880 for(; i < n_instantiations - max_shown + max_shown/2; ++i, cur = cur->tinst) |
|
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|
3881 {} |
|
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diff
changeset
|
3882 for(; i < n_instantiations; ++i, cur = cur->tinst) |
|
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|
3883 fprintf(stdmsg," instantiatied in %s: %s\n", cur->loc.toChars(), cur->toChars()); |
|
d4e95db0e62b
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|
3884 } |
|
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Introducing template instantiation traces for static asserts and errors within templates.
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|
3885 } |
|
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|
3886 |
| 336 | 3887 /* ======================== TemplateMixin ================================ */ |
| 3888 | |
| 3889 TemplateMixin::TemplateMixin(Loc loc, Identifier *ident, Type *tqual, | |
| 3890 Array *idents, Objects *tiargs) | |
| 3891 : TemplateInstance(loc, (Identifier *)idents->data[idents->dim - 1]) | |
| 3892 { | |
| 3893 //printf("TemplateMixin(ident = '%s')\n", ident ? ident->toChars() : ""); | |
| 3894 this->ident = ident; | |
| 3895 this->tqual = tqual; | |
| 3896 this->idents = idents; | |
| 3897 this->tiargs = tiargs ? tiargs : new Objects(); | |
| 3898 this->scope = NULL; | |
| 3899 } | |
| 3900 | |
| 3901 Dsymbol *TemplateMixin::syntaxCopy(Dsymbol *s) | |
| 3902 { TemplateMixin *tm; | |
| 3903 | |
| 3904 Array *ids = new Array(); | |
| 3905 ids->setDim(idents->dim); | |
| 3906 for (int i = 0; i < idents->dim; i++) | |
| 3907 { // Matches TypeQualified::syntaxCopyHelper() | |
| 3908 Identifier *id = (Identifier *)idents->data[i]; | |
| 3909 if (id->dyncast() == DYNCAST_DSYMBOL) | |
| 3910 { | |
| 3911 TemplateInstance *ti = (TemplateInstance *)id; | |
| 3912 | |
| 3913 ti = (TemplateInstance *)ti->syntaxCopy(NULL); | |
| 3914 id = (Identifier *)ti; | |
| 3915 } | |
| 3916 ids->data[i] = id; | |
| 3917 } | |
| 3918 | |
| 3919 tm = new TemplateMixin(loc, ident, | |
| 3920 (Type *)(tqual ? tqual->syntaxCopy() : NULL), | |
| 3921 ids, tiargs); | |
| 3922 TemplateInstance::syntaxCopy(tm); | |
| 3923 return tm; | |
| 3924 } | |
| 3925 | |
| 3926 void TemplateMixin::semantic(Scope *sc) | |
| 3927 { | |
| 3928 #if LOG | |
| 3929 printf("+TemplateMixin::semantic('%s', this=%p)\n", toChars(), this); | |
| 3930 fflush(stdout); | |
| 3931 #endif | |
| 3932 if (semanticdone && | |
| 3933 // This for when a class/struct contains mixin members, and | |
| 3934 // is done over because of forward references | |
| 3935 (!parent || !toParent()->isAggregateDeclaration())) | |
| 3936 { | |
| 3937 #if LOG | |
| 3938 printf("\tsemantic done\n"); | |
| 3939 #endif | |
| 3940 return; | |
| 3941 } | |
| 3942 if (!semanticdone) | |
| 3943 semanticdone = 1; | |
| 3944 #if LOG | |
| 3945 printf("\tdo semantic\n"); | |
| 3946 #endif | |
| 3947 | |
| 3948 #if !IN_LLVM | |
| 3949 // dont know what this is | |
| 3950 util_progress(); | |
| 3951 #endif | |
| 3952 | |
| 3953 Scope *scx = NULL; | |
| 3954 if (scope) | |
| 3955 { sc = scope; | |
| 3956 scx = scope; // save so we don't make redundant copies | |
| 3957 scope = NULL; | |
| 3958 } | |
| 3959 | |
| 3960 // Follow qualifications to find the TemplateDeclaration | |
| 3961 if (!tempdecl) | |
| 3962 { Dsymbol *s; | |
| 3963 int i; | |
| 3964 Identifier *id; | |
| 3965 | |
| 3966 if (tqual) | |
| 3967 { s = tqual->toDsymbol(sc); | |
| 3968 i = 0; | |
| 3969 } | |
| 3970 else | |
| 3971 { | |
| 3972 i = 1; | |
| 3973 id = (Identifier *)idents->data[0]; | |
| 3974 switch (id->dyncast()) | |
| 3975 { | |
| 3976 case DYNCAST_IDENTIFIER: | |
| 3977 s = sc->search(loc, id, NULL); | |
| 3978 break; | |
| 3979 | |
| 3980 case DYNCAST_DSYMBOL: | |
| 3981 { | |
| 3982 TemplateInstance *ti = (TemplateInstance *)id; | |
| 3983 ti->semantic(sc); | |
| 3984 s = ti; | |
| 3985 break; | |
| 3986 } | |
| 3987 default: | |
| 3988 assert(0); | |
| 3989 } | |
| 3990 } | |
| 3991 | |
| 3992 for (; i < idents->dim; i++) | |
| 3993 { | |
| 3994 if (!s) | |
| 3995 break; | |
| 3996 id = (Identifier *)idents->data[i]; | |
| 3997 s = s->searchX(loc, sc, id); | |
| 3998 } | |
| 3999 if (!s) | |
| 4000 { | |
| 4001 error("is not defined"); | |
| 4002 inst = this; | |
| 4003 return; | |
| 4004 } | |
| 4005 tempdecl = s->toAlias()->isTemplateDeclaration(); | |
| 4006 if (!tempdecl) | |
| 4007 { | |
| 4008 error("%s isn't a template", s->toChars()); | |
| 4009 inst = this; | |
| 4010 return; | |
| 4011 } | |
| 4012 } | |
| 4013 | |
| 4014 // Look for forward reference | |
| 4015 assert(tempdecl); | |
| 4016 for (TemplateDeclaration *td = tempdecl; td; td = td->overnext) | |
| 4017 { | |
| 4018 if (!td->scope) | |
| 4019 { | |
| 4020 /* Cannot handle forward references if mixin is a struct member, | |
| 4021 * because addField must happen during struct's semantic, not | |
| 4022 * during the mixin semantic. | |
| 4023 * runDeferred will re-run mixin's semantic outside of the struct's | |
| 4024 * semantic. | |
| 4025 */ | |
| 4026 semanticdone = 0; | |
| 4027 AggregateDeclaration *ad = toParent()->isAggregateDeclaration(); | |
| 4028 if (ad) | |
| 4029 ad->sizeok = 2; | |
| 4030 else | |
| 4031 { | |
| 4032 // Forward reference | |
| 4033 //printf("forward reference - deferring\n"); | |
| 4034 scope = scx ? scx : new Scope(*sc); | |
| 4035 scope->setNoFree(); | |
| 4036 scope->module->addDeferredSemantic(this); | |
| 4037 } | |
| 4038 return; | |
| 4039 } | |
| 4040 } | |
| 4041 | |
| 4042 // Run semantic on each argument, place results in tiargs[] | |
| 4043 semanticTiargs(sc); | |
| 4044 | |
| 4045 tempdecl = findBestMatch(sc); | |
| 4046 if (!tempdecl) | |
| 4047 { inst = this; | |
| 4048 return; // error recovery | |
| 4049 } | |
| 4050 | |
| 4051 if (!ident) | |
| 4052 ident = genIdent(); | |
| 4053 | |
| 4054 inst = this; | |
| 4055 parent = sc->parent; | |
| 4056 | |
| 4057 /* Detect recursive mixin instantiations. | |
| 4058 */ | |
| 4059 for (Dsymbol *s = parent; s; s = s->parent) | |
| 4060 { | |
| 4061 //printf("\ts = '%s'\n", s->toChars()); | |
| 4062 TemplateMixin *tm = s->isTemplateMixin(); | |
| 4063 if (!tm || tempdecl != tm->tempdecl) | |
| 4064 continue; | |
| 4065 | |
| 4066 /* Different argument list lengths happen with variadic args | |
| 4067 */ | |
| 4068 if (tiargs->dim != tm->tiargs->dim) | |
| 4069 continue; | |
| 4070 | |
| 4071 for (int i = 0; i < tiargs->dim; i++) | |
| 4072 { Object *o = (Object *)tiargs->data[i]; | |
| 4073 Type *ta = isType(o); | |
| 4074 Expression *ea = isExpression(o); | |
| 4075 Dsymbol *sa = isDsymbol(o); | |
| 4076 Object *tmo = (Object *)tm->tiargs->data[i]; | |
| 4077 if (ta) | |
| 4078 { | |
| 4079 Type *tmta = isType(tmo); | |
| 4080 if (!tmta) | |
| 4081 goto Lcontinue; | |
| 4082 if (!ta->equals(tmta)) | |
| 4083 goto Lcontinue; | |
| 4084 } | |
| 4085 else if (ea) | |
| 4086 { Expression *tme = isExpression(tmo); | |
| 4087 if (!tme || !ea->equals(tme)) | |
| 4088 goto Lcontinue; | |
| 4089 } | |
| 4090 else if (sa) | |
| 4091 { | |
| 4092 Dsymbol *tmsa = isDsymbol(tmo); | |
| 4093 if (sa != tmsa) | |
| 4094 goto Lcontinue; | |
| 4095 } | |
| 4096 else | |
| 4097 assert(0); | |
| 4098 } | |
| 4099 error("recursive mixin instantiation"); | |
| 4100 return; | |
| 4101 | |
| 4102 Lcontinue: | |
| 4103 continue; | |
| 4104 } | |
| 4105 | |
| 4106 // Copy the syntax trees from the TemplateDeclaration | |
| 4107 members = Dsymbol::arraySyntaxCopy(tempdecl->members); | |
| 4108 if (!members) | |
| 4109 return; | |
| 4110 | |
| 4111 symtab = new DsymbolTable(); | |
| 4112 | |
| 4113 for (Scope *sce = sc; 1; sce = sce->enclosing) | |
| 4114 { | |
| 4115 ScopeDsymbol *sds = (ScopeDsymbol *)sce->scopesym; | |
| 4116 if (sds) | |
| 4117 { | |
| 4118 sds->importScope(this, PROTpublic); | |
| 4119 break; | |
| 4120 } | |
| 4121 } | |
| 4122 | |
| 4123 #if LOG | |
| 4124 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
| 4125 #endif | |
| 4126 Scope *scy = sc; | |
| 4127 scy = sc->push(this); | |
| 4128 scy->parent = this; | |
| 4129 | |
| 4130 argsym = new ScopeDsymbol(); | |
| 4131 argsym->parent = scy->parent; | |
| 4132 Scope *scope = scy->push(argsym); | |
| 4133 | |
| 4134 unsigned errorsave = global.errors; | |
| 4135 | |
| 4136 // Declare each template parameter as an alias for the argument type | |
| 4137 declareParameters(scope); | |
| 4138 | |
| 4139 // Add members to enclosing scope, as well as this scope | |
| 4140 for (unsigned i = 0; i < members->dim; i++) | |
| 4141 { Dsymbol *s; | |
| 4142 | |
| 4143 s = (Dsymbol *)members->data[i]; | |
| 4144 s->addMember(scope, this, i); | |
| 4145 //sc->insert(s); | |
| 4146 //printf("sc->parent = %p, sc->scopesym = %p\n", sc->parent, sc->scopesym); | |
| 4147 //printf("s->parent = %s\n", s->parent->toChars()); | |
| 4148 } | |
| 4149 | |
| 4150 // Do semantic() analysis on template instance members | |
| 4151 #if LOG | |
| 4152 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
| 4153 #endif | |
| 4154 Scope *sc2; | |
| 4155 sc2 = scope->push(this); | |
| 4156 sc2->offset = sc->offset; | |
| 4157 for (int i = 0; i < members->dim; i++) | |
| 4158 { | |
| 4159 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 4160 s->semantic(sc2); | |
| 4161 } | |
| 4162 sc->offset = sc2->offset; | |
| 4163 | |
| 4164 /* The problem is when to parse the initializer for a variable. | |
| 4165 * Perhaps VarDeclaration::semantic() should do it like it does | |
| 4166 * for initializers inside a function. | |
| 4167 */ | |
| 4168 // if (sc->parent->isFuncDeclaration()) | |
| 4169 | |
| 4170 semantic2(sc2); | |
| 4171 | |
| 4172 if (sc->func) | |
| 4173 { | |
| 4174 semantic3(sc2); | |
| 4175 } | |
| 4176 | |
| 4177 // Give additional context info if error occurred during instantiation | |
| 4178 if (global.errors != errorsave) | |
| 4179 { | |
| 4180 error("error instantiating"); | |
| 4181 } | |
| 4182 | |
| 4183 sc2->pop(); | |
| 4184 | |
| 4185 scope->pop(); | |
| 4186 | |
| 4187 // if (!isAnonymous()) | |
| 4188 { | |
| 4189 scy->pop(); | |
| 4190 } | |
| 4191 #if LOG | |
| 4192 printf("-TemplateMixin::semantic('%s', this=%p)\n", toChars(), this); | |
| 4193 #endif | |
| 4194 } | |
| 4195 | |
| 4196 void TemplateMixin::semantic2(Scope *sc) | |
| 4197 { int i; | |
| 4198 | |
| 4199 if (semanticdone >= 2) | |
| 4200 return; | |
| 4201 semanticdone = 2; | |
| 4202 #if LOG | |
| 4203 printf("+TemplateMixin::semantic2('%s')\n", toChars()); | |
| 4204 #endif | |
| 4205 if (members) | |
| 4206 { | |
| 4207 assert(sc); | |
| 4208 sc = sc->push(argsym); | |
| 4209 sc = sc->push(this); | |
| 4210 for (i = 0; i < members->dim; i++) | |
| 4211 { | |
| 4212 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 4213 #if LOG | |
| 4214 printf("\tmember '%s', kind = '%s'\n", s->toChars(), s->kind()); | |
| 4215 #endif | |
| 4216 s->semantic2(sc); | |
| 4217 } | |
| 4218 sc = sc->pop(); | |
| 4219 sc->pop(); | |
| 4220 } | |
| 4221 #if LOG | |
| 4222 printf("-TemplateMixin::semantic2('%s')\n", toChars()); | |
| 4223 #endif | |
| 4224 } | |
| 4225 | |
| 4226 void TemplateMixin::semantic3(Scope *sc) | |
| 4227 { int i; | |
| 4228 | |
| 4229 if (semanticdone >= 3) | |
| 4230 return; | |
| 4231 semanticdone = 3; | |
| 4232 #if LOG | |
| 4233 printf("TemplateMixin::semantic3('%s')\n", toChars()); | |
| 4234 #endif | |
| 4235 if (members) | |
| 4236 { | |
| 4237 sc = sc->push(argsym); | |
| 4238 sc = sc->push(this); | |
| 4239 for (i = 0; i < members->dim; i++) | |
| 4240 { | |
| 4241 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 4242 s->semantic3(sc); | |
| 4243 } | |
| 4244 sc = sc->pop(); | |
| 4245 sc->pop(); | |
| 4246 } | |
| 4247 } | |
| 4248 | |
| 4249 void TemplateMixin::inlineScan() | |
| 4250 { | |
| 4251 TemplateInstance::inlineScan(); | |
| 4252 } | |
| 4253 | |
| 4254 const char *TemplateMixin::kind() | |
| 4255 { | |
| 4256 return "mixin"; | |
| 4257 } | |
| 4258 | |
| 4259 int TemplateMixin::oneMember(Dsymbol **ps) | |
| 4260 { | |
| 4261 return Dsymbol::oneMember(ps); | |
| 4262 } | |
| 4263 | |
| 4264 int TemplateMixin::hasPointers() | |
| 4265 { | |
| 4266 //printf("TemplateMixin::hasPointers() %s\n", toChars()); | |
| 4267 for (size_t i = 0; i < members->dim; i++) | |
| 4268 { | |
| 4269 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 4270 //printf(" s = %s %s\n", s->kind(), s->toChars()); | |
| 4271 if (s->hasPointers()) | |
| 4272 { | |
| 4273 return 1; | |
| 4274 } | |
| 4275 } | |
| 4276 return 0; | |
| 4277 } | |
| 4278 | |
| 4279 char *TemplateMixin::toChars() | |
| 4280 { | |
| 4281 OutBuffer buf; | |
| 4282 HdrGenState hgs; | |
| 4283 char *s; | |
| 4284 | |
| 4285 TemplateInstance::toCBuffer(&buf, &hgs); | |
| 4286 s = buf.toChars(); | |
| 4287 buf.data = NULL; | |
| 4288 return s; | |
| 4289 } | |
| 4290 | |
| 4291 void TemplateMixin::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 4292 { | |
| 4293 buf->writestring("mixin "); | |
| 4294 | |
| 4295 for (int i = 0; i < idents->dim; i++) | |
| 4296 { Identifier *id = (Identifier *)idents->data[i]; | |
| 4297 | |
| 4298 if (i) | |
| 4299 buf->writeByte('.'); | |
| 4300 buf->writestring(id->toChars()); | |
| 4301 } | |
| 4302 buf->writestring("!("); | |
| 4303 if (tiargs) | |
| 4304 { | |
| 4305 for (int i = 0; i < tiargs->dim; i++) | |
| 4306 { if (i) | |
| 4307 buf->writebyte(','); | |
| 4308 Object *oarg = (Object *)tiargs->data[i]; | |
| 4309 Type *t = isType(oarg); | |
| 4310 Expression *e = isExpression(oarg); | |
| 4311 Dsymbol *s = isDsymbol(oarg); | |
| 4312 if (t) | |
| 4313 t->toCBuffer(buf, NULL, hgs); | |
| 4314 else if (e) | |
| 4315 e->toCBuffer(buf, hgs); | |
| 4316 else if (s) | |
| 4317 { | |
| 4318 char *p = s->ident ? s->ident->toChars() : s->toChars(); | |
| 4319 buf->writestring(p); | |
| 4320 } | |
| 4321 else if (!oarg) | |
| 4322 { | |
| 4323 buf->writestring("NULL"); | |
| 4324 } | |
| 4325 else | |
| 4326 { | |
| 4327 assert(0); | |
| 4328 } | |
| 4329 } | |
| 4330 } | |
| 4331 buf->writebyte(')'); | |
| 4332 if (ident) | |
| 4333 { | |
| 4334 buf->writebyte(' '); | |
| 4335 buf->writestring(ident->toChars()); | |
| 4336 } | |
| 4337 buf->writebyte(';'); | |
| 4338 buf->writenl(); | |
| 4339 } | |
| 4340 | |
| 4341 | |
| 4342 void TemplateMixin::toObjFile(int multiobj) | |
| 4343 { | |
| 4344 //printf("TemplateMixin::toObjFile('%s')\n", toChars()); | |
| 4345 TemplateInstance::toObjFile(multiobj); | |
| 4346 } | |
| 4347 |