Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 114:e28b18c23469
added a module dmd.common for commonly used stuff
it currently holds code for consistency checking of predefined versions
also added a VisualD project file
| author | Trass3r |
|---|---|
| date | Wed, 01 Sep 2010 18:21:58 +0200 |
| parents | 3482c73a991b |
| children | 347de076ad34 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateDeclaration; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.ScopeDsymbol; | |
| 6 import dmd.ArrayTypes; | |
| 7 import dmd.Dsymbol; | |
| 8 import dmd.STC; | |
| 9 import dmd.TemplateThisParameter; | |
| 10 import dmd.Global; | |
| 11 import dmd.Array; | |
| 12 import dmd.Identifier; | |
| 13 import dmd.TypeArray; | |
| 14 import dmd.Expression; | |
| 15 import dmd.Scope; | |
| 16 import dmd.TypeIdentifier; | |
| 17 import dmd.TypeDelegate; | |
| 18 import dmd.IntegerExp; | |
| 19 import dmd.TypeSArray; | |
| 20 import dmd.StringExp; | |
| 21 import dmd.TOK; | |
| 22 import dmd.Argument; | |
| 23 import dmd.CtorDeclaration; | |
| 24 import dmd.TypeFunction; | |
| 25 import dmd.TY; | |
| 26 import dmd.OutBuffer; | |
| 27 import dmd.Declaration; | |
| 28 import dmd.HdrGenState; | |
| 29 import dmd.TemplateInstance; | |
| 30 import dmd.WANT; | |
| 31 import dmd.FuncDeclaration; | |
| 32 import dmd.TemplateTupleParameter; | |
| 33 import dmd.MATCH; | |
| 34 import dmd.Type; | |
| 35 import dmd.Tuple; | |
| 36 import dmd.TupleDeclaration; | |
| 37 import dmd.Initializer; | |
| 79 | 38 import dmd.Json; |
| 0 | 39 import dmd.ExpInitializer; |
| 40 import dmd.TemplateValueParameter; | |
| 41 import dmd.AliasDeclaration; | |
| 42 import dmd.VarDeclaration; | |
| 43 import dmd.TemplateParameter; | |
| 44 import dmd.TemplateTypeParameter; | |
| 45 | |
| 46 import dmd.expression.Util; | |
| 47 | |
| 48 import std.stdio; | |
| 49 | |
| 50 /************************************** | |
| 51 * Determine if TemplateDeclaration is variadic. | |
| 52 */ | |
| 53 | |
| 54 TemplateTupleParameter isVariadic(TemplateParameters parameters) | |
| 55 { | |
| 56 size_t dim = parameters.dim; | |
| 104 | 57 TemplateTupleParameter tp = null; |
| 0 | 58 |
| 104 | 59 if (dim) |
| 0 | 60 tp = (cast(TemplateParameter)parameters.data[dim - 1]).isTemplateTupleParameter(); |
| 61 | |
| 104 | 62 return tp; |
| 0 | 63 } |
| 64 | |
| 65 void ObjectToCBuffer(OutBuffer buf, HdrGenState* hgs, Object oarg) | |
| 66 { | |
| 104 | 67 //printf("ObjectToCBuffer()\n"); |
| 68 Type t = isType(oarg); | |
| 69 Expression e = isExpression(oarg); | |
| 70 Dsymbol s = isDsymbol(oarg); | |
| 71 Tuple v = isTuple(oarg); | |
| 72 if (t) | |
| 73 { | |
| 0 | 74 //printf("\tt: %s ty = %d\n", t.toChars(), t.ty); |
| 75 t.toCBuffer(buf, null, hgs); | |
| 104 | 76 } |
| 77 else if (e) | |
| 0 | 78 e.toCBuffer(buf, hgs); |
| 104 | 79 else if (s) |
| 80 { | |
| 0 | 81 string p = s.ident ? s.ident.toChars() : s.toChars(); |
| 82 buf.writestring(p); | |
| 104 | 83 } |
| 84 else if (v) | |
| 85 { | |
| 0 | 86 Objects args = v.objects; |
| 87 for (size_t i = 0; i < args.dim; i++) | |
| 88 { | |
| 89 if (i) | |
| 90 buf.writeByte(','); | |
|
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91 Object o = args[i]; |
| 0 | 92 ObjectToCBuffer(buf, hgs, o); |
| 93 } | |
| 104 | 94 } |
| 95 else if (!oarg) | |
| 96 { | |
| 0 | 97 buf.writestring("null"); |
| 104 | 98 } |
| 99 else | |
| 100 { | |
| 0 | 101 debug writef("bad Object = %p\n", oarg); |
| 102 assert(0); | |
| 104 | 103 } |
| 0 | 104 } |
| 105 | |
| 106 class TemplateDeclaration : ScopeDsymbol | |
| 107 { | |
| 104 | 108 TemplateParameters parameters; // array of TemplateParameter's |
| 0 | 109 |
| 104 | 110 TemplateParameters origParameters; // originals for Ddoc |
| 111 Expression constraint; | |
| 112 Array instances; // array of TemplateInstance's | |
| 0 | 113 |
| 104 | 114 TemplateDeclaration overnext; // next overloaded TemplateDeclaration |
| 115 TemplateDeclaration overroot; // first in overnext list | |
| 0 | 116 |
| 104 | 117 int semanticRun; // 1 semantic() run |
| 0 | 118 |
| 104 | 119 Dsymbol onemember; // if !=NULL then one member of this template |
| 0 | 120 |
| 104 | 121 int literal; // this template declaration is a literal |
| 0 | 122 |
| 104 | 123 this(Loc loc, Identifier id, TemplateParameters parameters, Expression constraint, Dsymbols decldefs) |
| 0 | 124 { |
| 125 super(id); | |
| 126 | |
| 127 version (LOG) { | |
| 128 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id.toChars()); | |
| 129 } | |
| 130 static if (false) { | |
| 131 if (parameters) | |
| 132 for (int i = 0; i < parameters.dim; i++) | |
| 133 { | |
| 134 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 135 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 136 TemplateTypeParameter ttp = tp.isTemplateTypeParameter(); | |
| 137 | |
| 138 if (ttp) | |
| 139 { | |
| 140 printf("\tparameter[%d] = %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 this.loc = loc; | |
| 146 this.parameters = parameters; | |
| 147 this.origParameters = parameters; | |
| 148 this.constraint = constraint; | |
| 149 this.members = decldefs; | |
| 150 | |
| 151 instances = new Array(); | |
| 152 } | |
| 153 | |
| 104 | 154 override Dsymbol syntaxCopy(Dsymbol) |
| 0 | 155 { |
| 51 | 156 //printf("TemplateDeclaration.syntaxCopy()\n"); |
| 157 TemplateDeclaration td; | |
| 158 TemplateParameters p; | |
|
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159 Dsymbols d; |
| 51 | 160 |
| 161 p = null; | |
| 162 if (parameters) | |
| 163 { | |
| 164 p = new TemplateParameters(); | |
| 165 p.setDim(parameters.dim); | |
| 166 for (int i = 0; i < p.dim; i++) | |
| 167 { | |
| 168 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 169 p.data[i] = cast(void*)tp.syntaxCopy(); | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 Expression e = null; | |
| 174 if (constraint) | |
| 175 e = constraint.syntaxCopy(); | |
| 176 d = Dsymbol.arraySyntaxCopy(members); | |
| 177 td = new TemplateDeclaration(loc, ident, p, e, d); | |
| 178 return td; | |
| 0 | 179 } |
| 180 | |
| 104 | 181 override void semantic(Scope sc) |
| 0 | 182 { |
| 183 version (LOG) { | |
| 184 printf("TemplateDeclaration.semantic(this = %p, id = '%s')\n", this, ident.toChars()); | |
| 185 } | |
| 186 if (semanticRun) | |
| 187 return; // semantic() already run | |
| 188 semanticRun = 1; | |
| 189 | |
| 190 if (sc.func) | |
| 191 { | |
| 192 version (DMDV1) { | |
| 193 error("cannot declare template at function scope %s", sc.func.toChars()); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 if (/*global.params.useArrayBounds &&*/ sc.module_) | |
| 198 { | |
| 199 // Generate this function as it may be used | |
| 200 // when template is instantiated in other modules | |
| 201 sc.module_.toModuleArray(); | |
| 202 } | |
| 203 | |
| 204 if (/*global.params.useAssert &&*/ sc.module_) | |
| 205 { | |
| 206 // Generate this function as it may be used | |
| 207 // when template is instantiated in other modules | |
| 208 sc.module_.toModuleAssert(); | |
| 209 } | |
| 210 | |
| 211 /* Remember Scope for later instantiations, but make | |
| 212 * a copy since attributes can change. | |
| 213 */ | |
|
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214 this.scope_ = sc.clone(); |
| 0 | 215 this.scope_.setNoFree(); |
| 216 | |
| 217 // Set up scope for parameters | |
| 218 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 219 paramsym.parent = sc.parent; | |
| 220 Scope paramscope = sc.push(paramsym); | |
| 221 paramscope.parameterSpecialization = 1; | |
| 222 paramscope.stc = STCundefined; | |
| 223 | |
| 224 if (!parent) | |
| 225 parent = sc.parent; | |
| 226 | |
| 227 if (global.params.doDocComments) | |
| 228 { | |
| 229 origParameters = new TemplateParameters(); | |
| 230 origParameters.setDim(parameters.dim); | |
| 231 for (int i = 0; i < parameters.dim; i++) | |
| 232 { | |
| 233 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 234 origParameters.data[i] = cast(void*)tp.syntaxCopy(); | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 for (int i = 0; i < parameters.dim; i++) | |
| 239 { | |
| 240 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 241 tp.declareParameter(paramscope); | |
| 242 } | |
| 243 | |
| 244 for (int i = 0; i < parameters.dim; i++) | |
| 245 { | |
| 246 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 247 | |
| 248 tp.semantic(paramscope); | |
| 249 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 250 error("template tuple parameter must be last one"); | |
| 251 } | |
| 252 | |
| 253 paramscope.pop(); | |
| 254 | |
| 255 if (members) | |
| 256 { | |
| 257 Dsymbol s; | |
| 258 if (Dsymbol.oneMembers(members, &s)) | |
| 259 { | |
| 260 if (s && s.ident && s.ident.equals(ident)) | |
| 261 { | |
| 262 onemember = s; | |
| 263 s.parent = this; | |
| 264 } | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 /* BUG: should check: | |
| 269 * o no virtual functions or non-static data members of classes | |
| 270 */ | |
| 271 } | |
| 272 | |
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273 /********************************** |
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274 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
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275 * Return !=0 if successful; i.e. no conflict. |
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276 */ |
| 104 | 277 override bool overloadInsert(Dsymbol s) |
| 0 | 278 { |
| 50 | 279 TemplateDeclaration *pf; |
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280 TemplateDeclaration f; |
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281 |
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282 version (LOG) { |
| 50 | 283 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
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284 } |
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285 f = s.isTemplateDeclaration(); |
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286 if (!f) |
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287 return false; |
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288 |
| 50 | 289 TemplateDeclaration pthis = this; |
| 290 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
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291 { |
| 50 | 292 static if (false) { |
| 293 // Conflict if TemplateParameter's match | |
| 294 // Will get caught anyway later with TemplateInstance, but | |
| 295 // should check it now. | |
| 296 if (f.parameters.dim != f2.parameters.dim) | |
| 297 goto Lcontinue; | |
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298 |
| 50 | 299 for (int i = 0; i < f.parameters.dim; i++) |
| 300 { | |
| 301 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 302 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
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303 |
| 50 | 304 if (!p1.overloadMatch(p2)) |
| 305 goto Lcontinue; | |
| 306 } | |
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307 |
| 50 | 308 version (LOG) { |
| 309 printf("\tfalse: conflict\n"); | |
| 310 } | |
| 311 return false; | |
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312 |
| 50 | 313 Lcontinue: |
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314 ; |
| 50 | 315 } |
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316 } |
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317 |
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318 f.overroot = this; |
| 50 | 319 *pf = f; |
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320 version (LOG) { |
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321 printf("\ttrue: no conflict\n"); |
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322 } |
| 50 | 323 |
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324 return true; |
| 0 | 325 } |
| 326 | |
| 104 | 327 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 328 { |
| 104 | 329 static if (false) // Should handle template functions |
| 330 { | |
| 331 if (onemember && onemember.isFuncDeclaration()) | |
| 332 buf.writestring("foo "); | |
| 333 } | |
| 334 buf.writestring(kind()); | |
| 335 buf.writeByte(' '); | |
| 336 buf.writestring(ident.toChars()); | |
| 337 buf.writeByte('('); | |
| 338 for (int i = 0; i < parameters.dim; i++) | |
| 339 { | |
| 340 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 341 if (hgs.ddoc) | |
| 342 tp = cast(TemplateParameter)origParameters.data[i]; | |
| 343 if (i) | |
| 344 buf.writeByte(','); | |
| 345 tp.toCBuffer(buf, hgs); | |
| 346 } | |
| 347 buf.writeByte(')'); | |
| 348 version(DMDV2) | |
| 349 { | |
| 350 if (constraint) | |
| 351 { buf.writestring(" if ("); | |
| 352 constraint.toCBuffer(buf, hgs); | |
| 353 buf.writeByte(')'); | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 if (hgs.hdrgen) | |
| 358 { | |
| 359 hgs.tpltMember++; | |
| 360 buf.writenl(); | |
| 361 buf.writebyte('{'); | |
| 362 buf.writenl(); | |
| 363 foreach (Dsymbol s; members) | |
| 364 s.toCBuffer(buf, hgs); | |
| 365 | |
| 366 buf.writebyte('}'); | |
| 367 buf.writenl(); | |
| 368 hgs.tpltMember--; | |
| 369 } | |
| 0 | 370 } |
| 371 | |
| 79 | 372 override void toJsonBuffer(OutBuffer buf) |
| 373 { | |
| 374 //writef("TemplateDeclaration.toJsonBuffer()\n"); | |
| 375 | |
| 376 buf.writestring("{\n"); | |
| 377 | |
| 378 JsonProperty(buf, Pname, toChars()); | |
| 379 JsonProperty(buf, Pkind, kind()); | |
| 380 if (comment) | |
| 381 JsonProperty(buf, Pcomment, comment); | |
| 382 | |
| 383 if (loc.linnum) | |
| 384 JsonProperty(buf, Pline, loc.linnum); | |
| 385 | |
| 386 JsonString(buf, Pmembers); | |
| 387 buf.writestring(" : [\n"); | |
| 388 size_t offset = buf.offset; | |
| 389 foreach (Dsymbol s; members) | |
| 390 { | |
| 391 if (offset != buf.offset) | |
| 96 | 392 { buf.writestring(",\n"); |
| 79 | 393 offset = buf.offset; |
| 394 } | |
| 395 s.toJsonBuffer(buf); | |
| 396 } | |
| 96 | 397 JsonRemoveComma(buf); |
| 79 | 398 buf.writestring("]\n"); |
| 399 | |
| 400 buf.writestring("}\n"); | |
| 401 } | |
| 402 | |
| 104 | 403 override string kind() |
| 0 | 404 { |
| 50 | 405 return (onemember && onemember.isAggregateDeclaration()) |
| 406 ? onemember.kind() | |
| 407 : "template"; | |
| 0 | 408 } |
| 409 | |
| 104 | 410 override string toChars() |
| 0 | 411 { |
| 49 | 412 OutBuffer buf = new OutBuffer(); |
| 413 HdrGenState hgs; | |
| 414 | |
| 415 /// memset(&hgs, 0, hgs.sizeof); | |
| 416 buf.writestring(ident.toChars()); | |
| 417 buf.writeByte('('); | |
| 418 for (int i = 0; i < parameters.dim; i++) | |
| 419 { | |
| 420 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 421 if (i) | |
| 422 buf.writeByte(','); | |
| 423 tp.toCBuffer(buf, &hgs); | |
| 424 } | |
| 425 buf.writeByte(')'); | |
| 426 version (DMDV2) { | |
| 427 if (constraint) | |
| 428 { | |
| 429 buf.writestring(" if ("); | |
| 430 constraint.toCBuffer(buf, &hgs); | |
| 431 buf.writeByte(')'); | |
| 432 } | |
| 433 } | |
| 434 buf.writeByte(0); | |
| 435 return buf.extractString(); | |
| 0 | 436 } |
| 437 | |
| 104 | 438 override void emitComment(Scope sc) |
| 0 | 439 { |
| 440 assert(false); | |
| 441 } | |
| 50 | 442 |
| 104 | 443 // void toDocBuffer(OutBuffer *buf); |
| 0 | 444 |
| 445 /*************************************** | |
| 446 * Given that ti is an instance of this TemplateDeclaration, | |
| 447 * deduce the types of the parameters to this, and store | |
| 448 * those deduced types in dedtypes[]. | |
| 449 * Input: | |
| 450 * flag 1: don't do semantic() because of dummy types | |
| 451 * 2: don't change types in matchArg() | |
| 452 * Output: | |
| 453 * dedtypes deduced arguments | |
| 454 * Return match level. | |
| 455 */ | |
| 104 | 456 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) |
| 0 | 457 { |
| 458 MATCH m; | |
| 459 int dedtypes_dim = dedtypes.dim; | |
| 460 | |
| 461 version (LOGM) { | |
| 50 | 462 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 463 } |
| 464 | |
| 465 static if (false) { | |
| 466 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 467 if (ti.tiargs.dim) | |
| 468 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 469 } | |
| 470 dedtypes.zero(); | |
| 471 | |
| 472 int parameters_dim = parameters.dim; | |
| 473 int variadic = isVariadic() !is null; | |
| 474 | |
| 475 // If more arguments than parameters, no match | |
| 476 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 477 { | |
| 478 version (LOGM) { | |
| 50 | 479 printf(" no match: more arguments than parameters\n"); |
| 0 | 480 } |
| 50 | 481 return MATCHnomatch; |
| 0 | 482 } |
| 483 | |
| 484 assert(dedtypes_dim == parameters_dim); | |
| 485 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 486 | |
| 487 // Set up scope for parameters | |
| 488 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 489 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 490 paramsym.parent = scope_.parent; | |
| 491 Scope paramscope = scope_.push(paramsym); | |
| 492 paramscope.stc = STCundefined; | |
| 493 | |
| 494 // Attempt type deduction | |
| 495 m = MATCHexact; | |
| 496 for (int i = 0; i < dedtypes_dim; i++) | |
| 497 { | |
| 498 MATCH m2; | |
| 499 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 500 Declaration sparam; | |
| 501 | |
| 502 //printf("\targument [%d]\n", i); | |
| 503 version (LOGM) { | |
| 504 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 505 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 506 if (ttp) | |
| 507 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 508 } | |
| 509 | |
| 510 version (DMDV1) { | |
| 511 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 512 } else { | |
| 513 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 514 } | |
| 515 //printf("\tm2 = %d\n", m2); | |
| 516 | |
| 517 if (m2 == MATCHnomatch) | |
| 518 { | |
| 519 static if (false) { | |
| 520 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 521 } | |
| 522 goto Lnomatch; | |
| 523 } | |
| 524 | |
| 525 if (m2 < m) | |
| 526 m = m2; | |
| 527 | |
| 528 if (!flag) | |
| 529 sparam.semantic(paramscope); | |
| 530 if (!paramscope.insert(sparam)) | |
| 531 goto Lnomatch; | |
| 532 } | |
| 533 | |
| 534 if (!flag) | |
| 535 { | |
| 536 /* Any parameter left without a type gets the type of | |
| 537 * its corresponding arg | |
| 538 */ | |
| 539 for (int i = 0; i < dedtypes_dim; i++) | |
| 540 { | |
|
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541 if (!dedtypes[i]) |
| 0 | 542 { |
| 543 assert(i < ti.tiargs.dim); | |
|
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544 dedtypes[i] = ti.tiargs[i]; |
| 0 | 545 } |
| 546 } | |
| 547 } | |
| 548 | |
| 549 version (DMDV2) { | |
| 550 if (m && constraint && !(flag & 1)) | |
| 551 { /* Check to see if constraint is satisfied. | |
| 552 */ | |
| 553 Expression e = constraint.syntaxCopy(); | |
| 554 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 555 e = e.semantic(paramscope); | |
| 556 e = e.optimize(WANTvalue | WANTinterpret); | |
| 557 if (e.isBool(true)) { | |
| 558 ; | |
| 559 } else if (e.isBool(false)) | |
| 560 goto Lnomatch; | |
| 561 else | |
| 562 { | |
| 563 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 564 } | |
| 565 } | |
| 566 } | |
| 567 | |
| 568 version (LOGM) { | |
| 569 // Print out the results | |
| 570 printf("--------------------------\n"); | |
| 571 printf("template %s\n", toChars()); | |
| 572 printf("instance %s\n", ti.toChars()); | |
| 573 if (m) | |
| 574 { | |
| 575 for (int i = 0; i < dedtypes_dim; i++) | |
| 576 { | |
| 577 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 578 Object oarg; | |
| 579 | |
| 580 printf(" [%d]", i); | |
| 581 | |
| 582 if (i < ti.tiargs.dim) | |
| 583 oarg = cast(Object)ti.tiargs.data[i]; | |
| 584 else | |
| 585 oarg = null; | |
| 586 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 587 } | |
| 588 } | |
| 589 else | |
| 590 goto Lnomatch; | |
| 591 } | |
| 592 | |
| 593 version (LOGM) { | |
| 594 printf(" match = %d\n", m); | |
| 595 } | |
| 596 goto Lret; | |
| 597 | |
| 598 Lnomatch: | |
| 599 version (LOGM) { | |
| 600 printf(" no match\n"); | |
| 601 } | |
| 602 m = MATCHnomatch; | |
| 603 | |
| 604 Lret: | |
| 605 paramscope.pop(); | |
| 606 version (LOGM) { | |
| 607 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 608 } | |
| 609 return m; | |
| 610 } | |
| 611 | |
| 51 | 612 /******************************************** |
| 613 * Determine partial specialization order of 'this' vs td2. | |
| 614 * Returns: | |
| 615 * match this is at least as specialized as td2 | |
| 616 * 0 td2 is more specialized than this | |
| 617 */ | |
| 104 | 618 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 0 | 619 { |
| 104 | 620 /* This works by taking the template parameters to this template |
| 51 | 621 * declaration and feeding them to td2 as if it were a template |
| 622 * instance. | |
| 623 * If it works, then this template is at least as specialized | |
| 624 * as td2. | |
| 625 */ | |
| 626 | |
| 627 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 628 scope Objects dedtypes = new Objects(); | |
| 629 | |
| 630 version (LOG_LEASTAS) { | |
| 631 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 632 } | |
| 633 | |
| 634 // Set type arguments to dummy template instance to be types | |
| 635 // generated from the parameters to this template declaration | |
| 636 ti.tiargs = new Objects(); | |
| 637 ti.tiargs.setDim(parameters.dim); | |
| 638 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 639 { | |
| 640 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 641 | |
|
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642 auto p = tp.dummyArg(); |
| 51 | 643 if (p) |
|
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|
644 ti.tiargs[i] = p; |
| 51 | 645 else |
| 646 ti.tiargs.setDim(i); | |
| 647 } | |
| 648 | |
| 649 // Temporary Array to hold deduced types | |
| 650 //dedtypes.setDim(parameters.dim); | |
| 651 dedtypes.setDim(td2.parameters.dim); | |
| 652 | |
| 653 // Attempt a type deduction | |
| 654 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 655 if (m) | |
| 656 { | |
| 657 /* A non-variadic template is more specialized than a | |
| 658 * variadic one. | |
| 659 */ | |
| 660 if (isVariadic() && !td2.isVariadic()) | |
| 661 goto L1; | |
| 662 | |
| 663 version (LOG_LEASTAS) { | |
| 664 printf(" matches %d, so is least as specialized\n", m); | |
| 665 } | |
| 666 return m; | |
| 667 } | |
| 668 L1: | |
| 669 version (LOG_LEASTAS) { | |
| 670 printf(" doesn't match, so is not as specialized\n"); | |
| 671 } | |
| 672 return MATCHnomatch; | |
| 0 | 673 } |
| 674 | |
| 675 /************************************************* | |
| 676 * Match function arguments against a specific template function. | |
| 677 * Input: | |
| 678 * loc instantiation location | |
| 679 * targsi Expression/Type initial list of template arguments | |
| 680 * ethis 'this' argument if !null | |
| 681 * fargs arguments to function | |
| 682 * Output: | |
| 683 * dedargs Expression/Type deduced template arguments | |
| 684 * Returns: | |
| 685 * match level | |
| 686 */ | |
| 104 | 687 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) |
| 0 | 688 { |
| 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 Arguments fparameters; // function parameter list | |
| 697 int fvarargs; // function varargs | |
| 698 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 699 | |
| 79 | 700 static if (false) |
| 701 { | |
| 0 | 702 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); |
| 703 for (i = 0; i < fargs.dim; i++) | |
| 704 { | |
| 705 Expression e = cast(Expression)fargs.data[i]; | |
| 706 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 707 } | |
| 708 printf("fd = %s\n", fd.toChars()); | |
| 709 printf("fd.type = %p\n", fd.type); | |
| 710 } | |
| 711 | |
| 712 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 713 | |
| 714 dedargs.setDim(parameters.dim); | |
| 715 dedargs.zero(); | |
| 716 | |
| 717 dedtypes.setDim(parameters.dim); | |
| 718 dedtypes.zero(); | |
| 719 | |
| 720 // Set up scope for parameters | |
| 721 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 722 paramsym.parent = scope_.parent; | |
| 723 Scope paramscope = scope_.push(paramsym); | |
| 724 | |
| 725 TemplateTupleParameter tp = isVariadic(); | |
| 726 | |
| 79 | 727 static if (false) |
| 728 { | |
| 0 | 729 for (i = 0; i < dedargs.dim; i++) |
| 730 { | |
| 731 printf("\tdedarg[%d] = ", i); | |
| 732 Object oarg = cast(Object)dedargs.data[i]; | |
| 733 if (oarg) printf("%s", oarg.toChars()); | |
| 734 printf("\n"); | |
| 735 } | |
| 736 } | |
| 737 | |
| 738 | |
| 739 nargsi = 0; | |
| 740 if (targsi) | |
| 79 | 741 { |
| 742 // Set initial template arguments | |
| 0 | 743 nargsi = targsi.dim; |
| 79 | 744 size_t n = parameters.dim; |
| 0 | 745 if (tp) |
| 746 n--; | |
| 747 if (nargsi > n) | |
| 748 { | |
| 749 if (!tp) | |
| 750 goto Lnomatch; | |
| 751 | |
| 752 /* The extra initial template arguments | |
| 753 * now form the tuple argument. | |
| 754 */ | |
|
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|
755 auto t = new Tuple(); |
| 0 | 756 assert(parameters.dim); |
|
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|
757 dedargs[parameters.dim - 1] = t; |
| 0 | 758 |
| 759 tuple_dim = nargsi - n; | |
| 760 t.objects.setDim(tuple_dim); | |
| 761 for (size_t i = 0; i < tuple_dim; i++) | |
| 762 { | |
|
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diff
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|
763 t.objects[i] = targsi[n + i]; |
| 0 | 764 } |
| 765 declareParameter(paramscope, tp, t); | |
| 766 } | |
| 767 else | |
| 768 n = nargsi; | |
| 769 | |
|
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|
770 memcpy(dedargs.ptr, targsi.ptr, n * (*dedargs.ptr).sizeof); |
| 0 | 771 |
| 772 for (size_t i = 0; i < n; i++) | |
| 773 { | |
| 774 assert(i < parameters.dim); | |
|
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775 auto tp2 = cast(TemplateParameter)parameters.data[i]; |
| 0 | 776 MATCH m; |
| 777 Declaration sparam = null; | |
| 778 | |
| 779 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 780 //printf("\tdeduceType m = %d\n", m); | |
| 781 if (m == MATCHnomatch) | |
| 782 goto Lnomatch; | |
| 783 if (m < match) | |
| 784 match = m; | |
| 785 | |
| 786 sparam.semantic(paramscope); | |
| 787 if (!paramscope.insert(sparam)) | |
| 788 goto Lnomatch; | |
| 789 } | |
| 790 } | |
| 79 | 791 static if (false) |
| 792 { | |
| 0 | 793 for (i = 0; i < dedargs.dim; i++) |
| 794 { | |
| 795 printf("\tdedarg[%d] = ", i); | |
| 796 Object oarg = cast(Object)dedargs.data[i]; | |
| 797 if (oarg) printf("%s", oarg.toChars()); | |
| 798 printf("\n"); | |
| 799 } | |
| 800 } | |
| 801 | |
| 802 if (fd.type) | |
| 803 { | |
| 804 assert(fd.type.ty == Tfunction); | |
| 805 TypeFunction fdtype = cast(TypeFunction)fd.type; | |
| 806 fparameters = fdtype.parameters; | |
| 807 fvarargs = fdtype.varargs; | |
| 808 } | |
| 809 else | |
| 810 { | |
| 811 CtorDeclaration fctor = fd.isCtorDeclaration(); | |
| 812 assert(fctor); | |
| 813 fparameters = fctor.arguments; | |
| 814 fvarargs = fctor.varargs; | |
| 815 } | |
| 816 | |
| 817 nfparams = Argument.dim(fparameters); // number of function parameters | |
| 818 nfargs = fargs ? fargs.dim : 0; // number of function arguments | |
| 819 | |
| 820 /* Check for match of function arguments with variadic template | |
| 821 * parameter, such as: | |
| 822 * | |
| 823 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 824 * void main() { Foo(1,2,3); } | |
| 825 */ | |
| 826 if (tp) // if variadic | |
| 827 { | |
| 79 | 828 if (nfparams == 0 && nfargs != 0) // if no function parameters |
| 0 | 829 { |
|
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|
830 auto t = new Tuple(); |
| 0 | 831 //printf("t = %p\n", t); |
|
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|
832 dedargs[parameters.dim - 1] = t; |
| 0 | 833 declareParameter(paramscope, tp, t); |
| 834 goto L2; | |
| 835 } | |
| 836 else if (nfargs < nfparams - 1) | |
| 837 goto L1; | |
| 838 else | |
| 839 { | |
| 840 /* Figure out which of the function parameters matches | |
| 841 * the tuple template parameter. Do this by matching | |
| 842 * type identifiers. | |
| 843 * Set the index of this function parameter to fptupindex. | |
| 844 */ | |
| 845 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 846 { | |
| 847 Argument fparam = cast(Argument)fparameters.data[fptupindex]; | |
| 848 if (fparam.type.ty != Tident) | |
| 849 continue; | |
| 850 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 851 if (!tp.ident.equals(tid.ident) || tid.idents.dim) | |
| 852 continue; | |
| 853 | |
| 854 if (fvarargs) // variadic function doesn't | |
| 855 goto Lnomatch; // go with variadic template | |
| 856 | |
| 857 /* The types of the function arguments | |
| 858 * now form the tuple argument. | |
| 859 */ | |
|
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90
diff
changeset
|
860 auto t = new Tuple(); |
|
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parents:
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diff
changeset
|
861 dedargs[parameters.dim - 1] = t; |
| 0 | 862 |
| 863 tuple_dim = nfargs - (nfparams - 1); | |
| 864 t.objects.setDim(tuple_dim); | |
| 865 for (size_t i = 0; i < tuple_dim; i++) | |
| 866 { | |
|
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|
867 auto farg = fargs[fptupindex + i]; |
|
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changeset
|
868 t.objects[i] = farg.type; |
| 0 | 869 } |
| 870 declareParameter(paramscope, tp, t); | |
| 871 goto L2; | |
| 872 } | |
| 873 fptupindex = -1; | |
| 874 } | |
| 875 } | |
| 876 | |
| 877 L1: | |
| 878 if (nfparams == nfargs) { | |
| 879 ; | |
| 880 } else if (nfargs > nfparams) { | |
| 881 if (fvarargs == 0) | |
| 882 goto Lnomatch; // too many args, no match | |
| 883 match = MATCHconvert; // match ... with a conversion | |
| 884 } | |
| 885 | |
| 886 L2: | |
| 887 version (DMDV2) { | |
| 888 // Match 'ethis' to any TemplateThisParameter's | |
| 889 if (ethis) | |
| 890 { | |
| 891 for (size_t i = 0; i < parameters.dim; i++) | |
| 892 { | |
| 893 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 894 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); | |
| 895 if (ttp) | |
| 896 { | |
| 897 MATCH m; | |
| 898 | |
| 899 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 900 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 901 if (!m) | |
| 902 goto Lnomatch; | |
| 903 if (m < match) | |
| 904 match = m; // pick worst match | |
| 905 } | |
| 906 } | |
| 907 } | |
| 908 } | |
| 909 | |
| 910 // Loop through the function parameters | |
| 911 for (size_t i = 0; i < nfparams; i++) | |
| 912 { | |
| 913 /* Skip over function parameters which wound up | |
| 914 * as part of a template tuple parameter. | |
| 915 */ | |
| 916 if (i == fptupindex) | |
| 917 { | |
| 918 if (fptupindex == nfparams - 1) | |
| 919 break; | |
| 920 i += tuple_dim - 1; | |
| 921 continue; | |
| 922 } | |
| 923 | |
| 924 Argument fparam = Argument.getNth(fparameters, i); | |
| 925 | |
| 926 if (i >= nfargs) // if not enough arguments | |
| 927 { | |
| 928 if (fparam.defaultArg) | |
| 929 { | |
| 930 /* Default arguments do not participate in template argument | |
| 931 * deduction. | |
| 932 */ | |
| 933 goto Lmatch; | |
| 934 } | |
| 935 } | |
| 936 else | |
| 937 { | |
|
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changeset
|
938 auto farg = fargs[i]; |
| 0 | 939 static if (false) { |
| 940 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 941 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 942 } | |
| 943 Type argtype = farg.type; | |
| 944 | |
| 945 version (DMDV2) { | |
| 946 /* Allow string literals which are type [] to match with [dim] | |
| 947 */ | |
| 948 if (farg.op == TOKstring) | |
| 949 { | |
| 950 StringExp se = cast(StringExp)farg; | |
| 951 if (!se.committed && argtype.ty == Tarray && | |
| 952 fparam.type.toBasetype().ty == Tsarray) | |
| 953 { | |
| 954 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 955 argtype = argtype.semantic(se.loc, null); | |
| 956 argtype = argtype.invariantOf(); | |
| 957 } | |
| 958 } | |
| 959 } | |
| 960 | |
| 961 MATCH m; | |
| 962 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 963 //printf("\tdeduceType m = %d\n", m); | |
| 964 | |
| 965 /* If no match, see if there's a conversion to a delegate | |
| 966 */ | |
| 967 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 968 { | |
| 969 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 970 TypeFunction tf = cast(TypeFunction)td.next; | |
| 971 | |
| 972 if (!tf.varargs && Argument.dim(tf.parameters) == 0) | |
| 973 { | |
| 974 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 975 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 976 m = MATCHconvert; | |
| 977 } | |
| 978 //printf("\tm2 = %d\n", m); | |
| 979 } | |
| 980 | |
| 981 if (m) | |
| 982 { | |
| 983 if (m < match) | |
| 984 match = m; // pick worst match | |
| 985 continue; | |
| 986 } | |
| 987 } | |
| 988 | |
| 989 /* The following code for variadic arguments closely | |
| 990 * matches TypeFunction.callMatch() | |
| 991 */ | |
| 992 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 993 goto Lnomatch; | |
| 994 | |
| 995 /* Check for match with function parameter T... | |
| 996 */ | |
| 997 Type tb = fparam.type.toBasetype(); | |
| 998 switch (tb.ty) | |
| 999 { | |
| 1000 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 1001 case Tsarray: | |
| 1002 { | |
| 1003 TypeSArray tsa = cast(TypeSArray)tb; | |
| 1004 ulong sz = tsa.dim.toInteger(); | |
| 1005 if (sz != nfargs - i) | |
| 1006 goto Lnomatch; | |
| 1007 } | |
| 1008 case Tarray: | |
| 1009 { | |
| 1010 TypeArray ta = cast(TypeArray)tb; | |
| 1011 for (; i < nfargs; i++) | |
| 1012 { | |
|
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|
1013 auto arg = fargs[i]; |
| 0 | 1014 assert(arg); |
| 1015 MATCH m; | |
| 1016 /* If lazy array of delegates, | |
| 1017 * convert arg(s) to delegate(s) | |
| 1018 */ | |
| 1019 Type tret = fparam.isLazyArray(); | |
| 1020 if (tret) | |
| 1021 { | |
| 1022 if (ta.next.equals(arg.type)) | |
| 1023 { | |
| 1024 m = MATCHexact; | |
| 1025 } | |
| 1026 else | |
| 1027 { | |
| 1028 m = arg.implicitConvTo(tret); | |
| 1029 if (m == MATCHnomatch) | |
| 1030 { | |
| 1031 if (tret.toBasetype().ty == Tvoid) | |
| 1032 m = MATCHconvert; | |
| 1033 } | |
| 1034 } | |
| 1035 } | |
| 1036 else | |
| 1037 { | |
| 1038 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 1039 //m = arg.implicitConvTo(ta.next); | |
| 1040 } | |
| 1041 if (m == MATCHnomatch) | |
| 1042 goto Lnomatch; | |
| 1043 if (m < match) | |
| 1044 match = m; | |
| 1045 } | |
| 1046 goto Lmatch; | |
| 1047 } | |
| 1048 case Tclass: | |
| 1049 case Tident: | |
| 1050 goto Lmatch; | |
| 1051 | |
| 1052 default: | |
| 1053 goto Lnomatch; | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 Lmatch: | |
| 1058 | |
| 1059 /* Fill in any missing arguments with their defaults. | |
| 1060 */ | |
| 1061 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 1062 { | |
|
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1063 auto tp2 = cast(TemplateParameter)parameters.data[i]; |
| 0 | 1064 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); |
| 1065 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 1066 * But for function templates, we really need them to match | |
| 1067 */ | |
|
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1068 Object oarg = dedargs[i]; |
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1069 Object oded = dedtypes[i]; |
| 0 | 1070 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); |
| 1071 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 1072 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 1073 if (!oarg) | |
| 1074 { | |
| 1075 if (oded) | |
| 1076 { | |
| 1077 if (tp2.specialization()) | |
| 1078 { | |
| 1079 /* The specialization can work as long as afterwards | |
| 1080 * the oded == oarg | |
| 1081 */ | |
| 1082 Declaration sparam; | |
|
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1083 dedargs[i] = oded; |
| 0 | 1084 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); |
| 1085 //printf("m2 = %d\n", m2); | |
| 1086 if (!m2) | |
| 1087 goto Lnomatch; | |
| 1088 if (m2 < match) | |
| 1089 match = m2; // pick worst match | |
|
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|
1090 if (dedtypes[i] !is oded) |
| 0 | 1091 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); |
| 1092 } | |
| 1093 } | |
| 1094 else | |
| 1095 { | |
| 1096 oded = tp2.defaultArg(loc, paramscope); | |
| 1097 if (!oded) | |
| 1098 goto Lnomatch; | |
| 1099 } | |
| 1100 declareParameter(paramscope, tp2, oded); | |
|
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|
1101 dedargs[i] = oded; |
| 0 | 1102 } |
| 1103 } | |
| 1104 | |
| 1105 version (DMDV2) { | |
| 1106 if (constraint) | |
| 1107 { /* Check to see if constraint is satisfied. | |
| 1108 */ | |
| 1109 Expression e = constraint.syntaxCopy(); | |
| 1110 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1111 e = e.semantic(paramscope); | |
| 1112 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1113 if (e.isBool(true)) { | |
| 1114 ; | |
| 1115 } else if (e.isBool(false)) | |
| 1116 goto Lnomatch; | |
| 1117 else | |
| 1118 { | |
| 1119 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1120 } | |
| 1121 } | |
| 1122 } | |
| 1123 | |
| 1124 static if (false) { | |
| 1125 for (i = 0; i < dedargs.dim; i++) | |
| 1126 { | |
| 1127 Type t = cast(Type)dedargs.data[i]; | |
| 1128 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1129 } | |
| 1130 } | |
| 1131 | |
| 1132 paramscope.pop(); | |
| 1133 //printf("\tmatch %d\n", match); | |
| 1134 return match; | |
| 1135 | |
| 1136 Lnomatch: | |
| 1137 paramscope.pop(); | |
| 1138 //printf("\tnomatch\n"); | |
| 1139 return MATCHnomatch; | |
| 1140 } | |
| 104 | 1141 |
| 0 | 1142 /************************************************* |
| 1143 * Given function arguments, figure out which template function | |
| 1144 * to expand, and return that function. | |
| 1145 * If no match, give error message and return null. | |
| 1146 * Input: | |
| 1147 * sc instantiation scope | |
| 1148 * loc instantiation location | |
| 1149 * targsi initial list of template arguments | |
| 1150 * ethis if !null, the 'this' pointer argument | |
| 1151 * fargs arguments to function | |
| 1152 * flags 1: do not issue error message on no match, just return null | |
| 1153 */ | |
| 1154 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1155 { | |
| 1156 MATCH m_best = MATCHnomatch; | |
| 1157 TemplateDeclaration td_ambig = null; | |
| 1158 TemplateDeclaration td_best = null; | |
| 1159 Objects tdargs = new Objects(); | |
| 1160 TemplateInstance ti; | |
| 1161 FuncDeclaration fd; | |
| 1162 | |
| 1163 static if (false) { | |
| 1164 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 104 | 1165 printf(" targsi:\n"); |
| 0 | 1166 if (targsi) |
| 1167 { | |
| 1168 for (int i = 0; i < targsi.dim; i++) | |
| 1169 { | |
| 1170 Object arg = cast(Object)targsi.data[i]; | |
| 1171 printf("\t%s\n", arg.toChars()); | |
| 1172 } | |
| 1173 } | |
| 104 | 1174 printf(" fargs:\n"); |
| 0 | 1175 for (int i = 0; i < fargs.dim; i++) |
| 1176 { | |
| 1177 Expression arg = cast(Expression)fargs.data[i]; | |
| 1178 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1179 //printf("\tty = %d\n", arg.type.ty); | |
| 1180 } | |
| 1181 } | |
| 1182 | |
| 1183 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1184 { | |
| 1185 if (!td.semanticRun) | |
| 1186 { | |
| 1187 error("forward reference to template %s", td.toChars()); | |
| 1188 goto Lerror; | |
| 1189 } | |
| 1190 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1191 { | |
| 1192 error("is not a function template"); | |
| 1193 goto Lerror; | |
| 1194 } | |
| 1195 | |
| 1196 MATCH m; | |
| 1197 scope Objects dedargs = new Objects(); | |
| 1198 | |
| 1199 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1200 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1201 if (!m) // if no match | |
| 1202 continue; | |
| 1203 | |
| 1204 if (m < m_best) | |
| 1205 goto Ltd_best; | |
| 1206 if (m > m_best) | |
| 1207 goto Ltd; | |
| 1208 | |
| 1209 { | |
| 1210 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1211 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1212 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1213 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1214 | |
| 1215 if (c1 > c2) | |
| 1216 goto Ltd; | |
| 1217 else if (c1 < c2) | |
| 1218 goto Ltd_best; | |
| 1219 else | |
| 1220 goto Lambig; | |
| 1221 } | |
| 1222 | |
| 1223 Lambig: // td_best and td are ambiguous | |
| 1224 td_ambig = td; | |
| 1225 continue; | |
| 1226 | |
| 1227 Ltd_best: // td_best is the best match so far | |
| 1228 td_ambig = null; | |
| 1229 continue; | |
| 1230 | |
| 1231 Ltd: // td is the new best match | |
| 1232 td_ambig = null; | |
| 1233 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1234 td_best = td; | |
| 1235 m_best = m; | |
| 1236 tdargs.setDim(dedargs.dim); | |
|
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|
1237 memcpy(tdargs.ptr, dedargs.ptr, tdargs.dim * (void*).sizeof); |
| 0 | 1238 continue; |
| 1239 } | |
| 1240 if (!td_best) | |
| 1241 { | |
| 1242 if (!(flags & 1)) | |
| 1243 error(loc, "does not match any function template declaration"); | |
| 1244 goto Lerror; | |
| 1245 } | |
| 1246 if (td_ambig) | |
| 1247 { | |
| 1248 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1249 td_best.toChars(), td_ambig.toChars()); | |
| 1250 } | |
| 1251 | |
| 1252 /* The best match is td_best with arguments tdargs. | |
| 1253 * Now instantiate the template. | |
| 1254 */ | |
| 1255 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1256 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1257 ti.semantic(sc); | |
| 1258 fd = ti.toAlias().isFuncDeclaration(); | |
| 1259 if (!fd) | |
| 1260 goto Lerror; | |
| 1261 return fd; | |
| 1262 | |
| 1263 Lerror: | |
| 1264 /// version (DMDV2) { | |
| 1265 if (!(flags & 1)) | |
| 1266 /// } | |
| 1267 { | |
| 1268 HdrGenState hgs; | |
| 1269 | |
| 1270 scope OutBuffer bufa = new OutBuffer(); | |
| 1271 Objects args = targsi; | |
| 1272 if (args) | |
| 1273 { | |
| 1274 for (int i = 0; i < args.dim; i++) | |
| 1275 { | |
| 1276 if (i) | |
| 1277 bufa.writeByte(','); | |
|
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|
1278 Object oarg = args[i]; |
| 0 | 1279 ObjectToCBuffer(bufa, &hgs, oarg); |
| 1280 } | |
| 1281 } | |
| 1282 | |
| 1283 scope OutBuffer buf = new OutBuffer(); | |
| 1284 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1285 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1286 } | |
| 1287 return null; | |
| 1288 } | |
| 1289 | |
| 1290 /************************************************** | |
| 1291 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1292 */ | |
| 104 | 1293 void declareParameter(Scope sc, TemplateParameter tp, Object o) |
| 0 | 1294 { |
| 1295 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1296 | |
| 1297 Type targ = isType(o); | |
| 1298 Expression ea = isExpression(o); | |
| 1299 Dsymbol sa = isDsymbol(o); | |
| 1300 Tuple va = isTuple(o); | |
| 1301 | |
| 1302 Dsymbol s; | |
| 1303 | |
| 1304 // See if tp.ident already exists with a matching definition | |
| 1305 Dsymbol scopesym; | |
| 1306 s = sc.search(loc, tp.ident, &scopesym); | |
| 1307 if (s && scopesym == sc.scopesym) | |
| 1308 { | |
| 1309 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1310 if (va && td) | |
| 1311 { | |
| 1312 Tuple tup = new Tuple(); | |
| 1313 assert(false); // < not implemented | |
| 1314 ///tup.objects = *td.objects; | |
| 1315 if (match(va, tup, this, sc)) | |
| 1316 { | |
| 1317 return; | |
| 1318 } | |
| 1319 } | |
| 1320 } | |
| 1321 | |
| 1322 if (targ) | |
| 1323 { | |
| 1324 //printf("type %s\n", targ.toChars()); | |
| 1325 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1326 } | |
| 1327 else if (sa) | |
| 1328 { | |
| 1329 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1330 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1331 } | |
| 1332 else if (ea) | |
| 1333 { | |
| 1334 // tdtypes.data[i] always matches ea here | |
| 1335 Initializer init = new ExpInitializer(loc, ea); | |
| 1336 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1337 | |
| 1338 Type t = tvp ? tvp.valType : null; | |
| 1339 | |
| 1340 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1341 v.storage_class = STCmanifest; | |
| 1342 s = v; | |
| 1343 } | |
| 1344 else if (va) | |
| 1345 { | |
| 1346 //printf("\ttuple\n"); | |
| 1347 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1348 } | |
| 1349 else | |
| 1350 { | |
| 1351 debug writefln(o.toString()); | |
| 1352 assert(0); | |
| 1353 } | |
| 1354 | |
| 1355 if (!sc.insert(s)) | |
| 1356 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1357 | |
| 1358 s.semantic(sc); | |
| 1359 } | |
| 1360 | |
| 104 | 1361 override TemplateDeclaration isTemplateDeclaration() { return this; } |
| 0 | 1362 |
| 104 | 1363 TemplateTupleParameter isVariadic() |
| 0 | 1364 { |
| 1365 return .isVariadic(parameters); | |
| 1366 } | |
| 1367 | |
| 63 | 1368 /*********************************** |
| 1369 * We can overload templates. | |
| 1370 */ | |
| 104 | 1371 override bool isOverloadable() |
| 0 | 1372 { |
| 104 | 1373 return true; |
| 0 | 1374 } |
| 72 | 1375 } |