Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 51:b7d29f613539
StaticAssertStatement.syntaxCopy
IfStatement.syntaxCopy
CompoundDeclarationStatement.syntaxCopy
VoidInitializer.syntaxCopy
TypeAArray.syntaxCopy
TypeTypeof.syntaxCopy
TypeAArray.resolve
TypeSArray.deduceType
TypeAArray.deduceType
TypeAArray.implicitConvTo
TemplateDeclaration.leastAsSpecialized
TemplateTypeParameter.dummyArg
TypeIdentifier.deduceType
TemplateTypeParameter.syntaxCopy
Lexer.hexStringConstant
Lexer.delimitedStringConstant
GotoDefaultStatement.ctor
CaseRangeStatement.ctor
Type.castMod
StorageClassDeclaration.syntaxCopy
TemplateDeclaration.syntaxCopy
| author | korDen |
|---|---|
| date | Sat, 21 Aug 2010 11:17:42 +0400 |
| parents | adf6f7f216ea |
| children | cab4c37afb89 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateDeclaration; |
| 2 | |
| 3 import dmd.Loc; | |
| 4 import dmd.ScopeDsymbol; | |
| 5 import dmd.ArrayTypes; | |
| 6 import dmd.Dsymbol; | |
| 7 import dmd.STC; | |
| 8 import dmd.TemplateThisParameter; | |
| 9 import dmd.Global; | |
| 10 import dmd.Array; | |
| 11 import dmd.Identifier; | |
| 12 import dmd.TypeArray; | |
| 13 import dmd.Expression; | |
| 14 import dmd.Scope; | |
| 15 import dmd.TypeIdentifier; | |
| 16 import dmd.TypeDelegate; | |
| 17 import dmd.IntegerExp; | |
| 18 import dmd.TypeSArray; | |
| 19 import dmd.StringExp; | |
| 20 import dmd.TOK; | |
| 21 import dmd.Argument; | |
| 22 import dmd.CtorDeclaration; | |
| 23 import dmd.TypeFunction; | |
| 24 import dmd.TY; | |
| 25 import dmd.OutBuffer; | |
| 26 import dmd.Declaration; | |
| 27 import dmd.HdrGenState; | |
| 28 import dmd.TemplateInstance; | |
| 29 import dmd.WANT; | |
| 30 import dmd.FuncDeclaration; | |
| 31 import dmd.TemplateTupleParameter; | |
| 32 import dmd.MATCH; | |
| 33 import dmd.Type; | |
| 34 import dmd.Tuple; | |
| 35 import dmd.TupleDeclaration; | |
| 36 import dmd.Initializer; | |
| 37 import dmd.ExpInitializer; | |
| 38 import dmd.TemplateValueParameter; | |
| 39 import dmd.AliasDeclaration; | |
| 40 import dmd.VarDeclaration; | |
| 41 import dmd.TemplateParameter; | |
| 42 import dmd.TemplateTypeParameter; | |
| 43 | |
| 44 import dmd.expression.Util; | |
| 45 | |
| 46 import std.stdio; | |
| 47 | |
| 48 /************************************** | |
| 49 * Determine if TemplateDeclaration is variadic. | |
| 50 */ | |
| 51 | |
| 52 TemplateTupleParameter isVariadic(TemplateParameters parameters) | |
| 53 { | |
| 54 size_t dim = parameters.dim; | |
| 55 TemplateTupleParameter tp = null; | |
| 56 | |
| 57 if (dim) | |
| 58 tp = (cast(TemplateParameter)parameters.data[dim - 1]).isTemplateTupleParameter(); | |
| 59 | |
| 60 return tp; | |
| 61 } | |
| 62 | |
| 63 void ObjectToCBuffer(OutBuffer buf, HdrGenState* hgs, Object oarg) | |
| 64 { | |
| 65 //printf("ObjectToCBuffer()\n"); | |
| 66 Type t = isType(oarg); | |
| 67 Expression e = isExpression(oarg); | |
| 68 Dsymbol s = isDsymbol(oarg); | |
| 69 Tuple v = isTuple(oarg); | |
| 70 if (t) | |
| 71 { | |
| 72 //printf("\tt: %s ty = %d\n", t.toChars(), t.ty); | |
| 73 t.toCBuffer(buf, null, hgs); | |
| 74 } | |
| 75 else if (e) | |
| 76 e.toCBuffer(buf, hgs); | |
| 77 else if (s) | |
| 78 { | |
| 79 string p = s.ident ? s.ident.toChars() : s.toChars(); | |
| 80 buf.writestring(p); | |
| 81 } | |
| 82 else if (v) | |
| 83 { | |
| 84 Objects args = v.objects; | |
| 85 for (size_t i = 0; i < args.dim; i++) | |
| 86 { | |
| 87 if (i) | |
| 88 buf.writeByte(','); | |
| 89 Object o = cast(Object)args.data[i]; | |
| 90 ObjectToCBuffer(buf, hgs, o); | |
| 91 } | |
| 92 } | |
| 93 else if (!oarg) | |
| 94 { | |
| 95 buf.writestring("null"); | |
| 96 } | |
| 97 else | |
| 98 { | |
| 99 debug writef("bad Object = %p\n", oarg); | |
| 100 assert(0); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 class TemplateDeclaration : ScopeDsymbol | |
| 105 { | |
| 106 TemplateParameters parameters; // array of TemplateParameter's | |
| 107 | |
| 108 TemplateParameters origParameters; // originals for Ddoc | |
| 109 Expression constraint; | |
| 110 Array instances; // array of TemplateInstance's | |
| 111 | |
| 112 TemplateDeclaration overnext; // next overloaded TemplateDeclaration | |
| 113 TemplateDeclaration overroot; // first in overnext list | |
| 114 | |
| 115 int semanticRun; // 1 semantic() run | |
| 116 | |
| 117 Dsymbol onemember; // if !=NULL then one member of this template | |
| 118 | |
| 119 int literal; // this template declaration is a literal | |
| 120 | |
| 121 this(Loc loc, Identifier id, TemplateParameters parameters, Expression constraint, Array decldefs) | |
| 122 { | |
| 123 super(id); | |
| 124 | |
| 125 version (LOG) { | |
| 126 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id.toChars()); | |
| 127 } | |
| 128 static if (false) { | |
| 129 if (parameters) | |
| 130 for (int i = 0; i < parameters.dim; i++) | |
| 131 { | |
| 132 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 133 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 134 TemplateTypeParameter ttp = tp.isTemplateTypeParameter(); | |
| 135 | |
| 136 if (ttp) | |
| 137 { | |
| 138 printf("\tparameter[%d] = %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 139 } | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 this.loc = loc; | |
| 144 this.parameters = parameters; | |
| 145 this.origParameters = parameters; | |
| 146 this.constraint = constraint; | |
| 147 this.members = decldefs; | |
| 148 | |
| 149 instances = new Array(); | |
| 150 } | |
| 151 | |
| 152 Dsymbol syntaxCopy(Dsymbol) | |
| 153 { | |
| 51 | 154 //printf("TemplateDeclaration.syntaxCopy()\n"); |
| 155 TemplateDeclaration td; | |
| 156 TemplateParameters p; | |
| 157 Array d; | |
| 158 | |
| 159 p = null; | |
| 160 if (parameters) | |
| 161 { | |
| 162 p = new TemplateParameters(); | |
| 163 p.setDim(parameters.dim); | |
| 164 for (int i = 0; i < p.dim; i++) | |
| 165 { | |
| 166 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 167 p.data[i] = cast(void*)tp.syntaxCopy(); | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 Expression e = null; | |
| 172 if (constraint) | |
| 173 e = constraint.syntaxCopy(); | |
| 174 d = Dsymbol.arraySyntaxCopy(members); | |
| 175 td = new TemplateDeclaration(loc, ident, p, e, d); | |
| 176 return td; | |
| 0 | 177 } |
| 178 | |
| 179 void semantic(Scope sc) | |
| 180 { | |
| 181 version (LOG) { | |
| 182 printf("TemplateDeclaration.semantic(this = %p, id = '%s')\n", this, ident.toChars()); | |
| 183 } | |
| 184 if (semanticRun) | |
| 185 return; // semantic() already run | |
| 186 semanticRun = 1; | |
| 187 | |
| 188 if (sc.func) | |
| 189 { | |
| 190 version (DMDV1) { | |
| 191 error("cannot declare template at function scope %s", sc.func.toChars()); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 if (/*global.params.useArrayBounds &&*/ sc.module_) | |
| 196 { | |
| 197 // Generate this function as it may be used | |
| 198 // when template is instantiated in other modules | |
| 199 sc.module_.toModuleArray(); | |
| 200 } | |
| 201 | |
| 202 if (/*global.params.useAssert &&*/ sc.module_) | |
| 203 { | |
| 204 // Generate this function as it may be used | |
| 205 // when template is instantiated in other modules | |
| 206 sc.module_.toModuleAssert(); | |
| 207 } | |
| 208 | |
| 209 /* Remember Scope for later instantiations, but make | |
| 210 * a copy since attributes can change. | |
| 211 */ | |
| 212 this.scope_ = new Scope(sc); /// A light copy | |
| 213 this.scope_.setNoFree(); | |
| 214 | |
| 215 // Set up scope for parameters | |
| 216 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 217 paramsym.parent = sc.parent; | |
| 218 Scope paramscope = sc.push(paramsym); | |
| 219 paramscope.parameterSpecialization = 1; | |
| 220 paramscope.stc = STCundefined; | |
| 221 | |
| 222 if (!parent) | |
| 223 parent = sc.parent; | |
| 224 | |
| 225 if (global.params.doDocComments) | |
| 226 { | |
| 227 origParameters = new TemplateParameters(); | |
| 228 origParameters.setDim(parameters.dim); | |
| 229 for (int i = 0; i < parameters.dim; i++) | |
| 230 { | |
| 231 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 232 origParameters.data[i] = cast(void*)tp.syntaxCopy(); | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 for (int i = 0; i < parameters.dim; i++) | |
| 237 { | |
| 238 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 239 tp.declareParameter(paramscope); | |
| 240 } | |
| 241 | |
| 242 for (int i = 0; i < parameters.dim; i++) | |
| 243 { | |
| 244 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 245 | |
| 246 tp.semantic(paramscope); | |
| 247 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 248 error("template tuple parameter must be last one"); | |
| 249 } | |
| 250 | |
| 251 paramscope.pop(); | |
| 252 | |
| 253 if (members) | |
| 254 { | |
| 255 Dsymbol s; | |
| 256 if (Dsymbol.oneMembers(members, &s)) | |
| 257 { | |
| 258 if (s && s.ident && s.ident.equals(ident)) | |
| 259 { | |
| 260 onemember = s; | |
| 261 s.parent = this; | |
| 262 } | |
| 263 } | |
| 264 } | |
| 265 | |
| 266 /* BUG: should check: | |
| 267 * o no virtual functions or non-static data members of classes | |
| 268 */ | |
| 269 } | |
| 270 | |
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271 /********************************** |
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272 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
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273 * Return !=0 if successful; i.e. no conflict. |
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274 */ |
| 0 | 275 bool overloadInsert(Dsymbol s) |
| 276 { | |
| 50 | 277 TemplateDeclaration *pf; |
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278 TemplateDeclaration f; |
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279 |
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280 version (LOG) { |
| 50 | 281 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
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282 } |
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283 f = s.isTemplateDeclaration(); |
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284 if (!f) |
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285 return false; |
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286 |
| 50 | 287 TemplateDeclaration pthis = this; |
| 288 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
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289 { |
| 50 | 290 static if (false) { |
| 291 // Conflict if TemplateParameter's match | |
| 292 // Will get caught anyway later with TemplateInstance, but | |
| 293 // should check it now. | |
| 294 if (f.parameters.dim != f2.parameters.dim) | |
| 295 goto Lcontinue; | |
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296 |
| 50 | 297 for (int i = 0; i < f.parameters.dim; i++) |
| 298 { | |
| 299 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 300 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
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301 |
| 50 | 302 if (!p1.overloadMatch(p2)) |
| 303 goto Lcontinue; | |
| 304 } | |
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305 |
| 50 | 306 version (LOG) { |
| 307 printf("\tfalse: conflict\n"); | |
| 308 } | |
| 309 return false; | |
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310 |
| 50 | 311 Lcontinue: |
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312 ; |
| 50 | 313 } |
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314 } |
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315 |
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316 f.overroot = this; |
| 50 | 317 *pf = f; |
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318 version (LOG) { |
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319 printf("\ttrue: no conflict\n"); |
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320 } |
| 50 | 321 |
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322 return true; |
| 0 | 323 } |
| 324 | |
| 325 void toCBuffer(OutBuffer buf, HdrGenState* hgs) | |
| 326 { | |
| 327 assert(false); | |
| 328 } | |
| 329 | |
| 330 string kind() | |
| 331 { | |
| 50 | 332 return (onemember && onemember.isAggregateDeclaration()) |
| 333 ? onemember.kind() | |
| 334 : "template"; | |
| 0 | 335 } |
| 336 | |
| 337 string toChars() | |
| 338 { | |
| 49 | 339 OutBuffer buf = new OutBuffer(); |
| 340 HdrGenState hgs; | |
| 341 | |
| 342 /// memset(&hgs, 0, hgs.sizeof); | |
| 343 buf.writestring(ident.toChars()); | |
| 344 buf.writeByte('('); | |
| 345 for (int i = 0; i < parameters.dim; i++) | |
| 346 { | |
| 347 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 348 if (i) | |
| 349 buf.writeByte(','); | |
| 350 tp.toCBuffer(buf, &hgs); | |
| 351 } | |
| 352 buf.writeByte(')'); | |
| 353 version (DMDV2) { | |
| 354 if (constraint) | |
| 355 { | |
| 356 buf.writestring(" if ("); | |
| 357 constraint.toCBuffer(buf, &hgs); | |
| 358 buf.writeByte(')'); | |
| 359 } | |
| 360 } | |
| 361 buf.writeByte(0); | |
| 362 return buf.extractString(); | |
| 0 | 363 } |
| 364 | |
| 365 void emitComment(Scope sc) | |
| 366 { | |
| 367 assert(false); | |
| 368 } | |
| 50 | 369 |
| 0 | 370 // void toDocBuffer(OutBuffer *buf); |
| 371 | |
| 372 /*************************************** | |
| 373 * Given that ti is an instance of this TemplateDeclaration, | |
| 374 * deduce the types of the parameters to this, and store | |
| 375 * those deduced types in dedtypes[]. | |
| 376 * Input: | |
| 377 * flag 1: don't do semantic() because of dummy types | |
| 378 * 2: don't change types in matchArg() | |
| 379 * Output: | |
| 380 * dedtypes deduced arguments | |
| 381 * Return match level. | |
| 382 */ | |
| 383 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) | |
| 384 { | |
| 385 MATCH m; | |
| 386 int dedtypes_dim = dedtypes.dim; | |
| 387 | |
| 388 version (LOGM) { | |
| 50 | 389 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 390 } |
| 391 | |
| 392 static if (false) { | |
| 393 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 394 if (ti.tiargs.dim) | |
| 395 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 396 } | |
| 397 dedtypes.zero(); | |
| 398 | |
| 399 int parameters_dim = parameters.dim; | |
| 400 int variadic = isVariadic() !is null; | |
| 401 | |
| 402 // If more arguments than parameters, no match | |
| 403 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 404 { | |
| 405 version (LOGM) { | |
| 50 | 406 printf(" no match: more arguments than parameters\n"); |
| 0 | 407 } |
| 50 | 408 return MATCHnomatch; |
| 0 | 409 } |
| 410 | |
| 411 assert(dedtypes_dim == parameters_dim); | |
| 412 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 413 | |
| 414 // Set up scope for parameters | |
| 415 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 416 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 417 paramsym.parent = scope_.parent; | |
| 418 Scope paramscope = scope_.push(paramsym); | |
| 419 paramscope.stc = STCundefined; | |
| 420 | |
| 421 // Attempt type deduction | |
| 422 m = MATCHexact; | |
| 423 for (int i = 0; i < dedtypes_dim; i++) | |
| 424 { | |
| 425 MATCH m2; | |
| 426 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 427 Declaration sparam; | |
| 428 | |
| 429 //printf("\targument [%d]\n", i); | |
| 430 version (LOGM) { | |
| 431 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 432 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 433 if (ttp) | |
| 434 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 435 } | |
| 436 | |
| 437 version (DMDV1) { | |
| 438 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 439 } else { | |
| 440 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 441 } | |
| 442 //printf("\tm2 = %d\n", m2); | |
| 443 | |
| 444 if (m2 == MATCHnomatch) | |
| 445 { | |
| 446 static if (false) { | |
| 447 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 448 } | |
| 449 goto Lnomatch; | |
| 450 } | |
| 451 | |
| 452 if (m2 < m) | |
| 453 m = m2; | |
| 454 | |
| 455 if (!flag) | |
| 456 sparam.semantic(paramscope); | |
| 457 if (!paramscope.insert(sparam)) | |
| 458 goto Lnomatch; | |
| 459 } | |
| 460 | |
| 461 if (!flag) | |
| 462 { | |
| 463 /* Any parameter left without a type gets the type of | |
| 464 * its corresponding arg | |
| 465 */ | |
| 466 for (int i = 0; i < dedtypes_dim; i++) | |
| 467 { | |
| 468 if (!dedtypes.data[i]) | |
| 469 { | |
| 470 assert(i < ti.tiargs.dim); | |
| 471 dedtypes.data[i] = ti.tiargs.data[i]; | |
| 472 } | |
| 473 } | |
| 474 } | |
| 475 | |
| 476 version (DMDV2) { | |
| 477 if (m && constraint && !(flag & 1)) | |
| 478 { /* Check to see if constraint is satisfied. | |
| 479 */ | |
| 480 Expression e = constraint.syntaxCopy(); | |
| 481 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 482 e = e.semantic(paramscope); | |
| 483 e = e.optimize(WANTvalue | WANTinterpret); | |
| 484 if (e.isBool(true)) { | |
| 485 ; | |
| 486 } else if (e.isBool(false)) | |
| 487 goto Lnomatch; | |
| 488 else | |
| 489 { | |
| 490 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 version (LOGM) { | |
| 496 // Print out the results | |
| 497 printf("--------------------------\n"); | |
| 498 printf("template %s\n", toChars()); | |
| 499 printf("instance %s\n", ti.toChars()); | |
| 500 if (m) | |
| 501 { | |
| 502 for (int i = 0; i < dedtypes_dim; i++) | |
| 503 { | |
| 504 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 505 Object oarg; | |
| 506 | |
| 507 printf(" [%d]", i); | |
| 508 | |
| 509 if (i < ti.tiargs.dim) | |
| 510 oarg = cast(Object)ti.tiargs.data[i]; | |
| 511 else | |
| 512 oarg = null; | |
| 513 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 514 } | |
| 515 } | |
| 516 else | |
| 517 goto Lnomatch; | |
| 518 } | |
| 519 | |
| 520 version (LOGM) { | |
| 521 printf(" match = %d\n", m); | |
| 522 } | |
| 523 goto Lret; | |
| 524 | |
| 525 Lnomatch: | |
| 526 version (LOGM) { | |
| 527 printf(" no match\n"); | |
| 528 } | |
| 529 m = MATCHnomatch; | |
| 530 | |
| 531 Lret: | |
| 532 paramscope.pop(); | |
| 533 version (LOGM) { | |
| 534 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 535 } | |
| 536 return m; | |
| 537 } | |
| 538 | |
| 51 | 539 /******************************************** |
| 540 * Determine partial specialization order of 'this' vs td2. | |
| 541 * Returns: | |
| 542 * match this is at least as specialized as td2 | |
| 543 * 0 td2 is more specialized than this | |
| 544 */ | |
| 0 | 545 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 546 { | |
| 51 | 547 /* This works by taking the template parameters to this template |
| 548 * declaration and feeding them to td2 as if it were a template | |
| 549 * instance. | |
| 550 * If it works, then this template is at least as specialized | |
| 551 * as td2. | |
| 552 */ | |
| 553 | |
| 554 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 555 scope Objects dedtypes = new Objects(); | |
| 556 | |
| 557 version (LOG_LEASTAS) { | |
| 558 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 559 } | |
| 560 | |
| 561 // Set type arguments to dummy template instance to be types | |
| 562 // generated from the parameters to this template declaration | |
| 563 ti.tiargs = new Objects(); | |
| 564 ti.tiargs.setDim(parameters.dim); | |
| 565 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 566 { | |
| 567 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 568 | |
| 569 void* p = tp.dummyArg(); | |
| 570 if (p) | |
| 571 ti.tiargs.data[i] = p; | |
| 572 else | |
| 573 ti.tiargs.setDim(i); | |
| 574 } | |
| 575 | |
| 576 // Temporary Array to hold deduced types | |
| 577 //dedtypes.setDim(parameters.dim); | |
| 578 dedtypes.setDim(td2.parameters.dim); | |
| 579 | |
| 580 // Attempt a type deduction | |
| 581 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 582 if (m) | |
| 583 { | |
| 584 /* A non-variadic template is more specialized than a | |
| 585 * variadic one. | |
| 586 */ | |
| 587 if (isVariadic() && !td2.isVariadic()) | |
| 588 goto L1; | |
| 589 | |
| 590 version (LOG_LEASTAS) { | |
| 591 printf(" matches %d, so is least as specialized\n", m); | |
| 592 } | |
| 593 return m; | |
| 594 } | |
| 595 L1: | |
| 596 version (LOG_LEASTAS) { | |
| 597 printf(" doesn't match, so is not as specialized\n"); | |
| 598 } | |
| 599 return MATCHnomatch; | |
| 0 | 600 } |
| 601 | |
| 602 /************************************************* | |
| 603 * Match function arguments against a specific template function. | |
| 604 * Input: | |
| 605 * loc instantiation location | |
| 606 * targsi Expression/Type initial list of template arguments | |
| 607 * ethis 'this' argument if !null | |
| 608 * fargs arguments to function | |
| 609 * Output: | |
| 610 * dedargs Expression/Type deduced template arguments | |
| 611 * Returns: | |
| 612 * match level | |
| 613 */ | |
| 614 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) | |
| 615 { | |
| 616 size_t nfparams; | |
| 617 size_t nfargs; | |
| 618 size_t nargsi; // array size of targsi | |
| 619 int fptupindex = -1; | |
| 620 int tuple_dim = 0; | |
| 621 MATCH match = MATCHexact; | |
| 622 FuncDeclaration fd = onemember.toAlias().isFuncDeclaration(); | |
| 623 Arguments fparameters; // function parameter list | |
| 624 int fvarargs; // function varargs | |
| 625 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 626 | |
| 627 static if (false) { | |
| 628 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); | |
| 629 for (i = 0; i < fargs.dim; i++) | |
| 630 { | |
| 631 Expression e = cast(Expression)fargs.data[i]; | |
| 632 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 633 } | |
| 634 printf("fd = %s\n", fd.toChars()); | |
| 635 printf("fd.type = %p\n", fd.type); | |
| 636 } | |
| 637 | |
| 638 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 639 | |
| 640 dedargs.setDim(parameters.dim); | |
| 641 dedargs.zero(); | |
| 642 | |
| 643 dedtypes.setDim(parameters.dim); | |
| 644 dedtypes.zero(); | |
| 645 | |
| 646 // Set up scope for parameters | |
| 647 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 648 paramsym.parent = scope_.parent; | |
| 649 Scope paramscope = scope_.push(paramsym); | |
| 650 | |
| 651 TemplateTupleParameter tp = isVariadic(); | |
| 652 | |
| 653 static if (false) { | |
| 654 for (i = 0; i < dedargs.dim; i++) | |
| 655 { | |
| 656 printf("\tdedarg[%d] = ", i); | |
| 657 Object oarg = cast(Object)dedargs.data[i]; | |
| 658 if (oarg) printf("%s", oarg.toChars()); | |
| 659 printf("\n"); | |
| 660 } | |
| 661 } | |
| 662 | |
| 663 | |
| 664 nargsi = 0; | |
| 665 if (targsi) | |
| 666 { // Set initial template arguments | |
| 667 size_t n; | |
| 668 | |
| 669 nargsi = targsi.dim; | |
| 670 n = parameters.dim; | |
| 671 if (tp) | |
| 672 n--; | |
| 673 if (nargsi > n) | |
| 674 { | |
| 675 if (!tp) | |
| 676 goto Lnomatch; | |
| 677 | |
| 678 /* The extra initial template arguments | |
| 679 * now form the tuple argument. | |
| 680 */ | |
| 681 Tuple t = new Tuple(); | |
| 682 assert(parameters.dim); | |
| 683 dedargs.data[parameters.dim - 1] = cast(void*)t; | |
| 684 | |
| 685 tuple_dim = nargsi - n; | |
| 686 t.objects.setDim(tuple_dim); | |
| 687 for (size_t i = 0; i < tuple_dim; i++) | |
| 688 { | |
| 689 t.objects.data[i] = cast(void*)targsi.data[n + i]; | |
| 690 } | |
| 691 declareParameter(paramscope, tp, t); | |
| 692 } | |
| 693 else | |
| 694 n = nargsi; | |
| 695 | |
| 696 memcpy(dedargs.data, targsi.data, n * (*dedargs.data).sizeof); | |
| 697 | |
| 698 for (size_t i = 0; i < n; i++) | |
| 699 { | |
| 700 assert(i < parameters.dim); | |
| 701 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 702 MATCH m; | |
| 703 Declaration sparam = null; | |
| 704 | |
| 705 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 706 //printf("\tdeduceType m = %d\n", m); | |
| 707 if (m == MATCHnomatch) | |
| 708 goto Lnomatch; | |
| 709 if (m < match) | |
| 710 match = m; | |
| 711 | |
| 712 sparam.semantic(paramscope); | |
| 713 if (!paramscope.insert(sparam)) | |
| 714 goto Lnomatch; | |
| 715 } | |
| 716 } | |
| 717 static if (false) { | |
| 718 for (i = 0; i < dedargs.dim; i++) | |
| 719 { | |
| 720 printf("\tdedarg[%d] = ", i); | |
| 721 Object oarg = cast(Object)dedargs.data[i]; | |
| 722 if (oarg) printf("%s", oarg.toChars()); | |
| 723 printf("\n"); | |
| 724 } | |
| 725 } | |
| 726 | |
| 727 if (fd.type) | |
| 728 { | |
| 729 assert(fd.type.ty == Tfunction); | |
| 730 TypeFunction fdtype = cast(TypeFunction)fd.type; | |
| 731 fparameters = fdtype.parameters; | |
| 732 fvarargs = fdtype.varargs; | |
| 733 } | |
| 734 else | |
| 735 { | |
| 736 CtorDeclaration fctor = fd.isCtorDeclaration(); | |
| 737 assert(fctor); | |
| 738 fparameters = fctor.arguments; | |
| 739 fvarargs = fctor.varargs; | |
| 740 } | |
| 741 | |
| 742 nfparams = Argument.dim(fparameters); // number of function parameters | |
| 743 nfargs = fargs ? fargs.dim : 0; // number of function arguments | |
| 744 | |
| 745 /* Check for match of function arguments with variadic template | |
| 746 * parameter, such as: | |
| 747 * | |
| 748 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 749 * void main() { Foo(1,2,3); } | |
| 750 */ | |
| 751 if (tp) // if variadic | |
| 752 { | |
| 753 if (nfparams == 0) // if no function parameters | |
| 754 { | |
| 755 Tuple t = new Tuple(); | |
| 756 //printf("t = %p\n", t); | |
| 757 dedargs.data[parameters.dim - 1] = cast(void*)t; | |
| 758 declareParameter(paramscope, tp, t); | |
| 759 goto L2; | |
| 760 } | |
| 761 else if (nfargs < nfparams - 1) | |
| 762 goto L1; | |
| 763 else | |
| 764 { | |
| 765 /* Figure out which of the function parameters matches | |
| 766 * the tuple template parameter. Do this by matching | |
| 767 * type identifiers. | |
| 768 * Set the index of this function parameter to fptupindex. | |
| 769 */ | |
| 770 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 771 { | |
| 772 Argument fparam = cast(Argument)fparameters.data[fptupindex]; | |
| 773 if (fparam.type.ty != Tident) | |
| 774 continue; | |
| 775 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 776 if (!tp.ident.equals(tid.ident) || tid.idents.dim) | |
| 777 continue; | |
| 778 | |
| 779 if (fvarargs) // variadic function doesn't | |
| 780 goto Lnomatch; // go with variadic template | |
| 781 | |
| 782 /* The types of the function arguments | |
| 783 * now form the tuple argument. | |
| 784 */ | |
| 785 Tuple t = new Tuple(); | |
| 786 dedargs.data[parameters.dim - 1] = cast(void*)t; | |
| 787 | |
| 788 tuple_dim = nfargs - (nfparams - 1); | |
| 789 t.objects.setDim(tuple_dim); | |
| 790 for (size_t i = 0; i < tuple_dim; i++) | |
| 791 { | |
| 792 Expression farg = cast(Expression)fargs.data[fptupindex + i]; | |
| 793 t.objects.data[i] = cast(void*)farg.type; | |
| 794 } | |
| 795 declareParameter(paramscope, tp, t); | |
| 796 goto L2; | |
| 797 } | |
| 798 fptupindex = -1; | |
| 799 } | |
| 800 } | |
| 801 | |
| 802 L1: | |
| 803 if (nfparams == nfargs) { | |
| 804 ; | |
| 805 } else if (nfargs > nfparams) { | |
| 806 if (fvarargs == 0) | |
| 807 goto Lnomatch; // too many args, no match | |
| 808 match = MATCHconvert; // match ... with a conversion | |
| 809 } | |
| 810 | |
| 811 L2: | |
| 812 version (DMDV2) { | |
| 813 // Match 'ethis' to any TemplateThisParameter's | |
| 814 if (ethis) | |
| 815 { | |
| 816 for (size_t i = 0; i < parameters.dim; i++) | |
| 817 { | |
| 818 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 819 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); | |
| 820 if (ttp) | |
| 821 { | |
| 822 MATCH m; | |
| 823 | |
| 824 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 825 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 826 if (!m) | |
| 827 goto Lnomatch; | |
| 828 if (m < match) | |
| 829 match = m; // pick worst match | |
| 830 } | |
| 831 } | |
| 832 } | |
| 833 } | |
| 834 | |
| 835 // Loop through the function parameters | |
| 836 for (size_t i = 0; i < nfparams; i++) | |
| 837 { | |
| 838 /* Skip over function parameters which wound up | |
| 839 * as part of a template tuple parameter. | |
| 840 */ | |
| 841 if (i == fptupindex) | |
| 842 { | |
| 843 if (fptupindex == nfparams - 1) | |
| 844 break; | |
| 845 i += tuple_dim - 1; | |
| 846 continue; | |
| 847 } | |
| 848 | |
| 849 Argument fparam = Argument.getNth(fparameters, i); | |
| 850 | |
| 851 if (i >= nfargs) // if not enough arguments | |
| 852 { | |
| 853 if (fparam.defaultArg) | |
| 854 { | |
| 855 /* Default arguments do not participate in template argument | |
| 856 * deduction. | |
| 857 */ | |
| 858 goto Lmatch; | |
| 859 } | |
| 860 } | |
| 861 else | |
| 862 { | |
| 863 Expression farg = cast(Expression)fargs.data[i]; | |
| 864 static if (false) { | |
| 865 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 866 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 867 } | |
| 868 Type argtype = farg.type; | |
| 869 | |
| 870 version (DMDV2) { | |
| 871 /* Allow string literals which are type [] to match with [dim] | |
| 872 */ | |
| 873 if (farg.op == TOKstring) | |
| 874 { | |
| 875 StringExp se = cast(StringExp)farg; | |
| 876 if (!se.committed && argtype.ty == Tarray && | |
| 877 fparam.type.toBasetype().ty == Tsarray) | |
| 878 { | |
| 879 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 880 argtype = argtype.semantic(se.loc, null); | |
| 881 argtype = argtype.invariantOf(); | |
| 882 } | |
| 883 } | |
| 884 } | |
| 885 | |
| 886 MATCH m; | |
| 887 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 888 //printf("\tdeduceType m = %d\n", m); | |
| 889 | |
| 890 /* If no match, see if there's a conversion to a delegate | |
| 891 */ | |
| 892 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 893 { | |
| 894 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 895 TypeFunction tf = cast(TypeFunction)td.next; | |
| 896 | |
| 897 if (!tf.varargs && Argument.dim(tf.parameters) == 0) | |
| 898 { | |
| 899 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 900 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 901 m = MATCHconvert; | |
| 902 } | |
| 903 //printf("\tm2 = %d\n", m); | |
| 904 } | |
| 905 | |
| 906 if (m) | |
| 907 { | |
| 908 if (m < match) | |
| 909 match = m; // pick worst match | |
| 910 continue; | |
| 911 } | |
| 912 } | |
| 913 | |
| 914 /* The following code for variadic arguments closely | |
| 915 * matches TypeFunction.callMatch() | |
| 916 */ | |
| 917 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 918 goto Lnomatch; | |
| 919 | |
| 920 /* Check for match with function parameter T... | |
| 921 */ | |
| 922 Type tb = fparam.type.toBasetype(); | |
| 923 switch (tb.ty) | |
| 924 { | |
| 925 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 926 case Tsarray: | |
| 927 { | |
| 928 TypeSArray tsa = cast(TypeSArray)tb; | |
| 929 ulong sz = tsa.dim.toInteger(); | |
| 930 if (sz != nfargs - i) | |
| 931 goto Lnomatch; | |
| 932 } | |
| 933 case Tarray: | |
| 934 { | |
| 935 TypeArray ta = cast(TypeArray)tb; | |
| 936 for (; i < nfargs; i++) | |
| 937 { | |
| 938 Expression arg = cast(Expression)fargs.data[i]; | |
| 939 assert(arg); | |
| 940 MATCH m; | |
| 941 /* If lazy array of delegates, | |
| 942 * convert arg(s) to delegate(s) | |
| 943 */ | |
| 944 Type tret = fparam.isLazyArray(); | |
| 945 if (tret) | |
| 946 { | |
| 947 if (ta.next.equals(arg.type)) | |
| 948 { | |
| 949 m = MATCHexact; | |
| 950 } | |
| 951 else | |
| 952 { | |
| 953 m = arg.implicitConvTo(tret); | |
| 954 if (m == MATCHnomatch) | |
| 955 { | |
| 956 if (tret.toBasetype().ty == Tvoid) | |
| 957 m = MATCHconvert; | |
| 958 } | |
| 959 } | |
| 960 } | |
| 961 else | |
| 962 { | |
| 963 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 964 //m = arg.implicitConvTo(ta.next); | |
| 965 } | |
| 966 if (m == MATCHnomatch) | |
| 967 goto Lnomatch; | |
| 968 if (m < match) | |
| 969 match = m; | |
| 970 } | |
| 971 goto Lmatch; | |
| 972 } | |
| 973 case Tclass: | |
| 974 case Tident: | |
| 975 goto Lmatch; | |
| 976 | |
| 977 default: | |
| 978 goto Lnomatch; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 Lmatch: | |
| 983 | |
| 984 /* Fill in any missing arguments with their defaults. | |
| 985 */ | |
| 986 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 987 { | |
| 988 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 989 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); | |
| 990 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 991 * But for function templates, we really need them to match | |
| 992 */ | |
| 993 Object oarg = cast(Object)dedargs.data[i]; | |
| 994 Object oded = cast(Object)dedtypes.data[i]; | |
| 995 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); | |
| 996 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 997 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 998 if (!oarg) | |
| 999 { | |
| 1000 if (oded) | |
| 1001 { | |
| 1002 if (tp2.specialization()) | |
| 1003 { | |
| 1004 /* The specialization can work as long as afterwards | |
| 1005 * the oded == oarg | |
| 1006 */ | |
| 1007 Declaration sparam; | |
| 1008 dedargs.data[i] = cast(void*)oded; | |
| 1009 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); | |
| 1010 //printf("m2 = %d\n", m2); | |
| 1011 if (!m2) | |
| 1012 goto Lnomatch; | |
| 1013 if (m2 < match) | |
| 1014 match = m2; // pick worst match | |
| 1015 if (dedtypes.data[i] !is cast(void*)oded) | |
| 1016 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); | |
| 1017 } | |
| 1018 } | |
| 1019 else | |
| 1020 { | |
| 1021 oded = tp2.defaultArg(loc, paramscope); | |
| 1022 if (!oded) | |
| 1023 goto Lnomatch; | |
| 1024 } | |
| 1025 declareParameter(paramscope, tp2, oded); | |
| 1026 dedargs.data[i] = cast(void*)oded; | |
| 1027 } | |
| 1028 } | |
| 1029 | |
| 1030 version (DMDV2) { | |
| 1031 if (constraint) | |
| 1032 { /* Check to see if constraint is satisfied. | |
| 1033 */ | |
| 1034 Expression e = constraint.syntaxCopy(); | |
| 1035 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1036 e = e.semantic(paramscope); | |
| 1037 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1038 if (e.isBool(true)) { | |
| 1039 ; | |
| 1040 } else if (e.isBool(false)) | |
| 1041 goto Lnomatch; | |
| 1042 else | |
| 1043 { | |
| 1044 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1045 } | |
| 1046 } | |
| 1047 } | |
| 1048 | |
| 1049 static if (false) { | |
| 1050 for (i = 0; i < dedargs.dim; i++) | |
| 1051 { | |
| 1052 Type t = cast(Type)dedargs.data[i]; | |
| 1053 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 paramscope.pop(); | |
| 1058 //printf("\tmatch %d\n", match); | |
| 1059 return match; | |
| 1060 | |
| 1061 Lnomatch: | |
| 1062 paramscope.pop(); | |
| 1063 //printf("\tnomatch\n"); | |
| 1064 return MATCHnomatch; | |
| 1065 } | |
| 1066 | |
| 1067 /************************************************* | |
| 1068 * Given function arguments, figure out which template function | |
| 1069 * to expand, and return that function. | |
| 1070 * If no match, give error message and return null. | |
| 1071 * Input: | |
| 1072 * sc instantiation scope | |
| 1073 * loc instantiation location | |
| 1074 * targsi initial list of template arguments | |
| 1075 * ethis if !null, the 'this' pointer argument | |
| 1076 * fargs arguments to function | |
| 1077 * flags 1: do not issue error message on no match, just return null | |
| 1078 */ | |
| 1079 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1080 { | |
| 1081 MATCH m_best = MATCHnomatch; | |
| 1082 TemplateDeclaration td_ambig = null; | |
| 1083 TemplateDeclaration td_best = null; | |
| 1084 Objects tdargs = new Objects(); | |
| 1085 TemplateInstance ti; | |
| 1086 FuncDeclaration fd; | |
| 1087 | |
| 1088 static if (false) { | |
| 1089 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 1090 printf(" targsi:\n"); | |
| 1091 if (targsi) | |
| 1092 { | |
| 1093 for (int i = 0; i < targsi.dim; i++) | |
| 1094 { | |
| 1095 Object arg = cast(Object)targsi.data[i]; | |
| 1096 printf("\t%s\n", arg.toChars()); | |
| 1097 } | |
| 1098 } | |
| 1099 printf(" fargs:\n"); | |
| 1100 for (int i = 0; i < fargs.dim; i++) | |
| 1101 { | |
| 1102 Expression arg = cast(Expression)fargs.data[i]; | |
| 1103 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1104 //printf("\tty = %d\n", arg.type.ty); | |
| 1105 } | |
| 1106 } | |
| 1107 | |
| 1108 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1109 { | |
| 1110 if (!td.semanticRun) | |
| 1111 { | |
| 1112 error("forward reference to template %s", td.toChars()); | |
| 1113 goto Lerror; | |
| 1114 } | |
| 1115 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1116 { | |
| 1117 error("is not a function template"); | |
| 1118 goto Lerror; | |
| 1119 } | |
| 1120 | |
| 1121 MATCH m; | |
| 1122 scope Objects dedargs = new Objects(); | |
| 1123 | |
| 1124 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1125 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1126 if (!m) // if no match | |
| 1127 continue; | |
| 1128 | |
| 1129 if (m < m_best) | |
| 1130 goto Ltd_best; | |
| 1131 if (m > m_best) | |
| 1132 goto Ltd; | |
| 1133 | |
| 1134 { | |
| 1135 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1136 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1137 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1138 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1139 | |
| 1140 if (c1 > c2) | |
| 1141 goto Ltd; | |
| 1142 else if (c1 < c2) | |
| 1143 goto Ltd_best; | |
| 1144 else | |
| 1145 goto Lambig; | |
| 1146 } | |
| 1147 | |
| 1148 Lambig: // td_best and td are ambiguous | |
| 1149 td_ambig = td; | |
| 1150 continue; | |
| 1151 | |
| 1152 Ltd_best: // td_best is the best match so far | |
| 1153 td_ambig = null; | |
| 1154 continue; | |
| 1155 | |
| 1156 Ltd: // td is the new best match | |
| 1157 td_ambig = null; | |
| 1158 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1159 td_best = td; | |
| 1160 m_best = m; | |
| 1161 tdargs.setDim(dedargs.dim); | |
| 1162 memcpy(tdargs.data, dedargs.data, tdargs.dim * (void*).sizeof); | |
| 1163 continue; | |
| 1164 } | |
| 1165 if (!td_best) | |
| 1166 { | |
| 1167 if (!(flags & 1)) | |
| 1168 error(loc, "does not match any function template declaration"); | |
| 1169 goto Lerror; | |
| 1170 } | |
| 1171 if (td_ambig) | |
| 1172 { | |
| 1173 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1174 td_best.toChars(), td_ambig.toChars()); | |
| 1175 } | |
| 1176 | |
| 1177 /* The best match is td_best with arguments tdargs. | |
| 1178 * Now instantiate the template. | |
| 1179 */ | |
| 1180 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1181 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1182 ti.semantic(sc); | |
| 1183 fd = ti.toAlias().isFuncDeclaration(); | |
| 1184 if (!fd) | |
| 1185 goto Lerror; | |
| 1186 return fd; | |
| 1187 | |
| 1188 Lerror: | |
| 1189 /// version (DMDV2) { | |
| 1190 if (!(flags & 1)) | |
| 1191 /// } | |
| 1192 { | |
| 1193 HdrGenState hgs; | |
| 1194 | |
| 1195 scope OutBuffer bufa = new OutBuffer(); | |
| 1196 Objects args = targsi; | |
| 1197 if (args) | |
| 1198 { | |
| 1199 for (int i = 0; i < args.dim; i++) | |
| 1200 { | |
| 1201 if (i) | |
| 1202 bufa.writeByte(','); | |
| 1203 Object oarg = cast(Object)args.data[i]; | |
| 1204 ObjectToCBuffer(bufa, &hgs, oarg); | |
| 1205 } | |
| 1206 } | |
| 1207 | |
| 1208 scope OutBuffer buf = new OutBuffer(); | |
| 1209 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1210 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1211 } | |
| 1212 return null; | |
| 1213 } | |
| 1214 | |
| 1215 /************************************************** | |
| 1216 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1217 */ | |
| 1218 void declareParameter(Scope sc, TemplateParameter tp, Object o) | |
| 1219 { | |
| 1220 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1221 | |
| 1222 Type targ = isType(o); | |
| 1223 Expression ea = isExpression(o); | |
| 1224 Dsymbol sa = isDsymbol(o); | |
| 1225 Tuple va = isTuple(o); | |
| 1226 | |
| 1227 Dsymbol s; | |
| 1228 | |
| 1229 // See if tp.ident already exists with a matching definition | |
| 1230 Dsymbol scopesym; | |
| 1231 s = sc.search(loc, tp.ident, &scopesym); | |
| 1232 if (s && scopesym == sc.scopesym) | |
| 1233 { | |
| 1234 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1235 if (va && td) | |
| 1236 { | |
| 1237 Tuple tup = new Tuple(); | |
| 1238 assert(false); // < not implemented | |
| 1239 ///tup.objects = *td.objects; | |
| 1240 if (match(va, tup, this, sc)) | |
| 1241 { | |
| 1242 return; | |
| 1243 } | |
| 1244 } | |
| 1245 } | |
| 1246 | |
| 1247 if (targ) | |
| 1248 { | |
| 1249 //printf("type %s\n", targ.toChars()); | |
| 1250 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1251 } | |
| 1252 else if (sa) | |
| 1253 { | |
| 1254 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1255 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1256 } | |
| 1257 else if (ea) | |
| 1258 { | |
| 1259 // tdtypes.data[i] always matches ea here | |
| 1260 Initializer init = new ExpInitializer(loc, ea); | |
| 1261 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1262 | |
| 1263 Type t = tvp ? tvp.valType : null; | |
| 1264 | |
| 1265 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1266 v.storage_class = STCmanifest; | |
| 1267 s = v; | |
| 1268 } | |
| 1269 else if (va) | |
| 1270 { | |
| 1271 //printf("\ttuple\n"); | |
| 1272 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1273 } | |
| 1274 else | |
| 1275 { | |
| 1276 debug writefln(o.toString()); | |
| 1277 assert(0); | |
| 1278 } | |
| 1279 | |
| 1280 if (!sc.insert(s)) | |
| 1281 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1282 | |
| 1283 s.semantic(sc); | |
| 1284 } | |
| 1285 | |
| 1286 TemplateDeclaration isTemplateDeclaration() { return this; } | |
| 1287 | |
| 1288 TemplateTupleParameter isVariadic() | |
| 1289 { | |
| 1290 return .isVariadic(parameters); | |
| 1291 } | |
| 1292 | |
| 1293 bool isOverloadable() | |
| 1294 { | |
| 1295 assert(false); | |
| 1296 } | |
| 1297 } |