Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 104:a1cf34da9ebe
+ TemplateDeclaration.toCBuffer
+ TypeExp.rvalue
+ TypeExp.toElem
| author | Trass3r |
|---|---|
| date | Tue, 31 Aug 2010 16:35:41 +0200 |
| parents | 3a0b150c9841 |
| children | 12c0c84d13fd |
| 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; | |
| 79 | 37 import dmd.Json; |
| 0 | 38 import dmd.ExpInitializer; |
| 39 import dmd.TemplateValueParameter; | |
| 40 import dmd.AliasDeclaration; | |
| 41 import dmd.VarDeclaration; | |
| 42 import dmd.TemplateParameter; | |
| 43 import dmd.TemplateTypeParameter; | |
| 44 | |
| 45 import dmd.expression.Util; | |
| 46 | |
| 47 import std.stdio; | |
| 48 | |
| 49 /************************************** | |
| 50 * Determine if TemplateDeclaration is variadic. | |
| 51 */ | |
| 52 | |
| 53 TemplateTupleParameter isVariadic(TemplateParameters parameters) | |
| 54 { | |
| 55 size_t dim = parameters.dim; | |
| 104 | 56 TemplateTupleParameter tp = null; |
| 0 | 57 |
| 104 | 58 if (dim) |
| 0 | 59 tp = (cast(TemplateParameter)parameters.data[dim - 1]).isTemplateTupleParameter(); |
| 60 | |
| 104 | 61 return tp; |
| 0 | 62 } |
| 63 | |
| 64 void ObjectToCBuffer(OutBuffer buf, HdrGenState* hgs, Object oarg) | |
| 65 { | |
| 104 | 66 //printf("ObjectToCBuffer()\n"); |
| 67 Type t = isType(oarg); | |
| 68 Expression e = isExpression(oarg); | |
| 69 Dsymbol s = isDsymbol(oarg); | |
| 70 Tuple v = isTuple(oarg); | |
| 71 if (t) | |
| 72 { | |
| 0 | 73 //printf("\tt: %s ty = %d\n", t.toChars(), t.ty); |
| 74 t.toCBuffer(buf, null, hgs); | |
| 104 | 75 } |
| 76 else if (e) | |
| 0 | 77 e.toCBuffer(buf, hgs); |
| 104 | 78 else if (s) |
| 79 { | |
| 0 | 80 string p = s.ident ? s.ident.toChars() : s.toChars(); |
| 81 buf.writestring(p); | |
| 104 | 82 } |
| 83 else if (v) | |
| 84 { | |
| 0 | 85 Objects args = v.objects; |
| 86 for (size_t i = 0; i < args.dim; i++) | |
| 87 { | |
| 88 if (i) | |
| 89 buf.writeByte(','); | |
| 90 Object o = cast(Object)args.data[i]; | |
| 91 ObjectToCBuffer(buf, hgs, o); | |
| 92 } | |
| 104 | 93 } |
| 94 else if (!oarg) | |
| 95 { | |
| 0 | 96 buf.writestring("null"); |
| 104 | 97 } |
| 98 else | |
| 99 { | |
| 0 | 100 debug writef("bad Object = %p\n", oarg); |
| 101 assert(0); | |
| 104 | 102 } |
| 0 | 103 } |
| 104 | |
| 105 class TemplateDeclaration : ScopeDsymbol | |
| 106 { | |
| 104 | 107 TemplateParameters parameters; // array of TemplateParameter's |
| 0 | 108 |
| 104 | 109 TemplateParameters origParameters; // originals for Ddoc |
| 110 Expression constraint; | |
| 111 Array instances; // array of TemplateInstance's | |
| 0 | 112 |
| 104 | 113 TemplateDeclaration overnext; // next overloaded TemplateDeclaration |
| 114 TemplateDeclaration overroot; // first in overnext list | |
| 0 | 115 |
| 104 | 116 int semanticRun; // 1 semantic() run |
| 0 | 117 |
| 104 | 118 Dsymbol onemember; // if !=NULL then one member of this template |
| 0 | 119 |
| 104 | 120 int literal; // this template declaration is a literal |
| 0 | 121 |
| 104 | 122 this(Loc loc, Identifier id, TemplateParameters parameters, Expression constraint, Dsymbols decldefs) |
| 0 | 123 { |
| 124 super(id); | |
| 125 | |
| 126 version (LOG) { | |
| 127 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id.toChars()); | |
| 128 } | |
| 129 static if (false) { | |
| 130 if (parameters) | |
| 131 for (int i = 0; i < parameters.dim; i++) | |
| 132 { | |
| 133 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 134 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 135 TemplateTypeParameter ttp = tp.isTemplateTypeParameter(); | |
| 136 | |
| 137 if (ttp) | |
| 138 { | |
| 139 printf("\tparameter[%d] = %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 140 } | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 this.loc = loc; | |
| 145 this.parameters = parameters; | |
| 146 this.origParameters = parameters; | |
| 147 this.constraint = constraint; | |
| 148 this.members = decldefs; | |
| 149 | |
| 150 instances = new Array(); | |
| 151 } | |
| 152 | |
| 104 | 153 override Dsymbol syntaxCopy(Dsymbol) |
| 0 | 154 { |
| 51 | 155 //printf("TemplateDeclaration.syntaxCopy()\n"); |
| 156 TemplateDeclaration td; | |
| 157 TemplateParameters p; | |
|
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158 Dsymbols d; |
| 51 | 159 |
| 160 p = null; | |
| 161 if (parameters) | |
| 162 { | |
| 163 p = new TemplateParameters(); | |
| 164 p.setDim(parameters.dim); | |
| 165 for (int i = 0; i < p.dim; i++) | |
| 166 { | |
| 167 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 168 p.data[i] = cast(void*)tp.syntaxCopy(); | |
| 169 } | |
| 170 } | |
| 171 | |
| 172 Expression e = null; | |
| 173 if (constraint) | |
| 174 e = constraint.syntaxCopy(); | |
| 175 d = Dsymbol.arraySyntaxCopy(members); | |
| 176 td = new TemplateDeclaration(loc, ident, p, e, d); | |
| 177 return td; | |
| 0 | 178 } |
| 179 | |
| 104 | 180 override void semantic(Scope sc) |
| 0 | 181 { |
| 182 version (LOG) { | |
| 183 printf("TemplateDeclaration.semantic(this = %p, id = '%s')\n", this, ident.toChars()); | |
| 184 } | |
| 185 if (semanticRun) | |
| 186 return; // semantic() already run | |
| 187 semanticRun = 1; | |
| 188 | |
| 189 if (sc.func) | |
| 190 { | |
| 191 version (DMDV1) { | |
| 192 error("cannot declare template at function scope %s", sc.func.toChars()); | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 if (/*global.params.useArrayBounds &&*/ sc.module_) | |
| 197 { | |
| 198 // Generate this function as it may be used | |
| 199 // when template is instantiated in other modules | |
| 200 sc.module_.toModuleArray(); | |
| 201 } | |
| 202 | |
| 203 if (/*global.params.useAssert &&*/ sc.module_) | |
| 204 { | |
| 205 // Generate this function as it may be used | |
| 206 // when template is instantiated in other modules | |
| 207 sc.module_.toModuleAssert(); | |
| 208 } | |
| 209 | |
| 210 /* Remember Scope for later instantiations, but make | |
| 211 * a copy since attributes can change. | |
| 212 */ | |
|
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213 this.scope_ = sc.clone(); |
| 0 | 214 this.scope_.setNoFree(); |
| 215 | |
| 216 // Set up scope for parameters | |
| 217 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 218 paramsym.parent = sc.parent; | |
| 219 Scope paramscope = sc.push(paramsym); | |
| 220 paramscope.parameterSpecialization = 1; | |
| 221 paramscope.stc = STCundefined; | |
| 222 | |
| 223 if (!parent) | |
| 224 parent = sc.parent; | |
| 225 | |
| 226 if (global.params.doDocComments) | |
| 227 { | |
| 228 origParameters = new TemplateParameters(); | |
| 229 origParameters.setDim(parameters.dim); | |
| 230 for (int i = 0; i < parameters.dim; i++) | |
| 231 { | |
| 232 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 233 origParameters.data[i] = cast(void*)tp.syntaxCopy(); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 for (int i = 0; i < parameters.dim; i++) | |
| 238 { | |
| 239 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 240 tp.declareParameter(paramscope); | |
| 241 } | |
| 242 | |
| 243 for (int i = 0; i < parameters.dim; i++) | |
| 244 { | |
| 245 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 246 | |
| 247 tp.semantic(paramscope); | |
| 248 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 249 error("template tuple parameter must be last one"); | |
| 250 } | |
| 251 | |
| 252 paramscope.pop(); | |
| 253 | |
| 254 if (members) | |
| 255 { | |
| 256 Dsymbol s; | |
| 257 if (Dsymbol.oneMembers(members, &s)) | |
| 258 { | |
| 259 if (s && s.ident && s.ident.equals(ident)) | |
| 260 { | |
| 261 onemember = s; | |
| 262 s.parent = this; | |
| 263 } | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 /* BUG: should check: | |
| 268 * o no virtual functions or non-static data members of classes | |
| 269 */ | |
| 270 } | |
| 271 | |
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272 /********************************** |
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273 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
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274 * Return !=0 if successful; i.e. no conflict. |
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275 */ |
| 104 | 276 override bool overloadInsert(Dsymbol s) |
| 0 | 277 { |
| 50 | 278 TemplateDeclaration *pf; |
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279 TemplateDeclaration f; |
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280 |
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281 version (LOG) { |
| 50 | 282 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
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283 } |
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284 f = s.isTemplateDeclaration(); |
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285 if (!f) |
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286 return false; |
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287 |
| 50 | 288 TemplateDeclaration pthis = this; |
| 289 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
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290 { |
| 50 | 291 static if (false) { |
| 292 // Conflict if TemplateParameter's match | |
| 293 // Will get caught anyway later with TemplateInstance, but | |
| 294 // should check it now. | |
| 295 if (f.parameters.dim != f2.parameters.dim) | |
| 296 goto Lcontinue; | |
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297 |
| 50 | 298 for (int i = 0; i < f.parameters.dim; i++) |
| 299 { | |
| 300 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 301 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
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302 |
| 50 | 303 if (!p1.overloadMatch(p2)) |
| 304 goto Lcontinue; | |
| 305 } | |
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306 |
| 50 | 307 version (LOG) { |
| 308 printf("\tfalse: conflict\n"); | |
| 309 } | |
| 310 return false; | |
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311 |
| 50 | 312 Lcontinue: |
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313 ; |
| 50 | 314 } |
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315 } |
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316 |
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317 f.overroot = this; |
| 50 | 318 *pf = f; |
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319 version (LOG) { |
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320 printf("\ttrue: no conflict\n"); |
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321 } |
| 50 | 322 |
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323 return true; |
| 0 | 324 } |
| 325 | |
| 104 | 326 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 327 { |
| 104 | 328 static if (false) // Should handle template functions |
| 329 { | |
| 330 if (onemember && onemember.isFuncDeclaration()) | |
| 331 buf.writestring("foo "); | |
| 332 } | |
| 333 buf.writestring(kind()); | |
| 334 buf.writeByte(' '); | |
| 335 buf.writestring(ident.toChars()); | |
| 336 buf.writeByte('('); | |
| 337 for (int i = 0; i < parameters.dim; i++) | |
| 338 { | |
| 339 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 340 if (hgs.ddoc) | |
| 341 tp = cast(TemplateParameter)origParameters.data[i]; | |
| 342 if (i) | |
| 343 buf.writeByte(','); | |
| 344 tp.toCBuffer(buf, hgs); | |
| 345 } | |
| 346 buf.writeByte(')'); | |
| 347 version(DMDV2) | |
| 348 { | |
| 349 if (constraint) | |
| 350 { buf.writestring(" if ("); | |
| 351 constraint.toCBuffer(buf, hgs); | |
| 352 buf.writeByte(')'); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 if (hgs.hdrgen) | |
| 357 { | |
| 358 hgs.tpltMember++; | |
| 359 buf.writenl(); | |
| 360 buf.writebyte('{'); | |
| 361 buf.writenl(); | |
| 362 foreach (Dsymbol s; members) | |
| 363 s.toCBuffer(buf, hgs); | |
| 364 | |
| 365 buf.writebyte('}'); | |
| 366 buf.writenl(); | |
| 367 hgs.tpltMember--; | |
| 368 } | |
| 0 | 369 } |
| 370 | |
| 79 | 371 override void toJsonBuffer(OutBuffer buf) |
| 372 { | |
| 373 //writef("TemplateDeclaration.toJsonBuffer()\n"); | |
| 374 | |
| 375 buf.writestring("{\n"); | |
| 376 | |
| 377 JsonProperty(buf, Pname, toChars()); | |
| 378 JsonProperty(buf, Pkind, kind()); | |
| 379 if (comment) | |
| 380 JsonProperty(buf, Pcomment, comment); | |
| 381 | |
| 382 if (loc.linnum) | |
| 383 JsonProperty(buf, Pline, loc.linnum); | |
| 384 | |
| 385 JsonString(buf, Pmembers); | |
| 386 buf.writestring(" : [\n"); | |
| 387 size_t offset = buf.offset; | |
| 388 foreach (Dsymbol s; members) | |
| 389 { | |
| 390 if (offset != buf.offset) | |
| 391 { buf.writestring(","); | |
| 392 offset = buf.offset; | |
| 393 } | |
| 394 s.toJsonBuffer(buf); | |
| 395 } | |
| 396 buf.writestring("]\n"); | |
| 397 | |
| 398 buf.writestring("}\n"); | |
| 399 } | |
| 400 | |
| 104 | 401 override string kind() |
| 0 | 402 { |
| 50 | 403 return (onemember && onemember.isAggregateDeclaration()) |
| 404 ? onemember.kind() | |
| 405 : "template"; | |
| 0 | 406 } |
| 407 | |
| 104 | 408 override string toChars() |
| 0 | 409 { |
| 49 | 410 OutBuffer buf = new OutBuffer(); |
| 411 HdrGenState hgs; | |
| 412 | |
| 413 /// memset(&hgs, 0, hgs.sizeof); | |
| 414 buf.writestring(ident.toChars()); | |
| 415 buf.writeByte('('); | |
| 416 for (int i = 0; i < parameters.dim; i++) | |
| 417 { | |
| 418 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 419 if (i) | |
| 420 buf.writeByte(','); | |
| 421 tp.toCBuffer(buf, &hgs); | |
| 422 } | |
| 423 buf.writeByte(')'); | |
| 424 version (DMDV2) { | |
| 425 if (constraint) | |
| 426 { | |
| 427 buf.writestring(" if ("); | |
| 428 constraint.toCBuffer(buf, &hgs); | |
| 429 buf.writeByte(')'); | |
| 430 } | |
| 431 } | |
| 432 buf.writeByte(0); | |
| 433 return buf.extractString(); | |
| 0 | 434 } |
| 435 | |
| 104 | 436 override void emitComment(Scope sc) |
| 0 | 437 { |
| 438 assert(false); | |
| 439 } | |
| 50 | 440 |
| 104 | 441 // void toDocBuffer(OutBuffer *buf); |
| 0 | 442 |
| 443 /*************************************** | |
| 444 * Given that ti is an instance of this TemplateDeclaration, | |
| 445 * deduce the types of the parameters to this, and store | |
| 446 * those deduced types in dedtypes[]. | |
| 447 * Input: | |
| 448 * flag 1: don't do semantic() because of dummy types | |
| 449 * 2: don't change types in matchArg() | |
| 450 * Output: | |
| 451 * dedtypes deduced arguments | |
| 452 * Return match level. | |
| 453 */ | |
| 104 | 454 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) |
| 0 | 455 { |
| 456 MATCH m; | |
| 457 int dedtypes_dim = dedtypes.dim; | |
| 458 | |
| 459 version (LOGM) { | |
| 50 | 460 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 461 } |
| 462 | |
| 463 static if (false) { | |
| 464 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 465 if (ti.tiargs.dim) | |
| 466 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 467 } | |
| 468 dedtypes.zero(); | |
| 469 | |
| 470 int parameters_dim = parameters.dim; | |
| 471 int variadic = isVariadic() !is null; | |
| 472 | |
| 473 // If more arguments than parameters, no match | |
| 474 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 475 { | |
| 476 version (LOGM) { | |
| 50 | 477 printf(" no match: more arguments than parameters\n"); |
| 0 | 478 } |
| 50 | 479 return MATCHnomatch; |
| 0 | 480 } |
| 481 | |
| 482 assert(dedtypes_dim == parameters_dim); | |
| 483 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 484 | |
| 485 // Set up scope for parameters | |
| 486 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 487 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 488 paramsym.parent = scope_.parent; | |
| 489 Scope paramscope = scope_.push(paramsym); | |
| 490 paramscope.stc = STCundefined; | |
| 491 | |
| 492 // Attempt type deduction | |
| 493 m = MATCHexact; | |
| 494 for (int i = 0; i < dedtypes_dim; i++) | |
| 495 { | |
| 496 MATCH m2; | |
| 497 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 498 Declaration sparam; | |
| 499 | |
| 500 //printf("\targument [%d]\n", i); | |
| 501 version (LOGM) { | |
| 502 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 503 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 504 if (ttp) | |
| 505 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 506 } | |
| 507 | |
| 508 version (DMDV1) { | |
| 509 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 510 } else { | |
| 511 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 512 } | |
| 513 //printf("\tm2 = %d\n", m2); | |
| 514 | |
| 515 if (m2 == MATCHnomatch) | |
| 516 { | |
| 517 static if (false) { | |
| 518 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 519 } | |
| 520 goto Lnomatch; | |
| 521 } | |
| 522 | |
| 523 if (m2 < m) | |
| 524 m = m2; | |
| 525 | |
| 526 if (!flag) | |
| 527 sparam.semantic(paramscope); | |
| 528 if (!paramscope.insert(sparam)) | |
| 529 goto Lnomatch; | |
| 530 } | |
| 531 | |
| 532 if (!flag) | |
| 533 { | |
| 534 /* Any parameter left without a type gets the type of | |
| 535 * its corresponding arg | |
| 536 */ | |
| 537 for (int i = 0; i < dedtypes_dim; i++) | |
| 538 { | |
| 539 if (!dedtypes.data[i]) | |
| 540 { | |
| 541 assert(i < ti.tiargs.dim); | |
| 542 dedtypes.data[i] = ti.tiargs.data[i]; | |
| 543 } | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 version (DMDV2) { | |
| 548 if (m && constraint && !(flag & 1)) | |
| 549 { /* Check to see if constraint is satisfied. | |
| 550 */ | |
| 551 Expression e = constraint.syntaxCopy(); | |
| 552 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 553 e = e.semantic(paramscope); | |
| 554 e = e.optimize(WANTvalue | WANTinterpret); | |
| 555 if (e.isBool(true)) { | |
| 556 ; | |
| 557 } else if (e.isBool(false)) | |
| 558 goto Lnomatch; | |
| 559 else | |
| 560 { | |
| 561 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 562 } | |
| 563 } | |
| 564 } | |
| 565 | |
| 566 version (LOGM) { | |
| 567 // Print out the results | |
| 568 printf("--------------------------\n"); | |
| 569 printf("template %s\n", toChars()); | |
| 570 printf("instance %s\n", ti.toChars()); | |
| 571 if (m) | |
| 572 { | |
| 573 for (int i = 0; i < dedtypes_dim; i++) | |
| 574 { | |
| 575 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 576 Object oarg; | |
| 577 | |
| 578 printf(" [%d]", i); | |
| 579 | |
| 580 if (i < ti.tiargs.dim) | |
| 581 oarg = cast(Object)ti.tiargs.data[i]; | |
| 582 else | |
| 583 oarg = null; | |
| 584 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 585 } | |
| 586 } | |
| 587 else | |
| 588 goto Lnomatch; | |
| 589 } | |
| 590 | |
| 591 version (LOGM) { | |
| 592 printf(" match = %d\n", m); | |
| 593 } | |
| 594 goto Lret; | |
| 595 | |
| 596 Lnomatch: | |
| 597 version (LOGM) { | |
| 598 printf(" no match\n"); | |
| 599 } | |
| 600 m = MATCHnomatch; | |
| 601 | |
| 602 Lret: | |
| 603 paramscope.pop(); | |
| 604 version (LOGM) { | |
| 605 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 606 } | |
| 607 return m; | |
| 608 } | |
| 609 | |
| 51 | 610 /******************************************** |
| 611 * Determine partial specialization order of 'this' vs td2. | |
| 612 * Returns: | |
| 613 * match this is at least as specialized as td2 | |
| 614 * 0 td2 is more specialized than this | |
| 615 */ | |
| 104 | 616 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 0 | 617 { |
| 104 | 618 /* This works by taking the template parameters to this template |
| 51 | 619 * declaration and feeding them to td2 as if it were a template |
| 620 * instance. | |
| 621 * If it works, then this template is at least as specialized | |
| 622 * as td2. | |
| 623 */ | |
| 624 | |
| 625 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 626 scope Objects dedtypes = new Objects(); | |
| 627 | |
| 628 version (LOG_LEASTAS) { | |
| 629 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 630 } | |
| 631 | |
| 632 // Set type arguments to dummy template instance to be types | |
| 633 // generated from the parameters to this template declaration | |
| 634 ti.tiargs = new Objects(); | |
| 635 ti.tiargs.setDim(parameters.dim); | |
| 636 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 637 { | |
| 638 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 639 | |
|
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|
640 auto p = tp.dummyArg(); |
| 51 | 641 if (p) |
|
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diff
changeset
|
642 ti.tiargs[i] = p; |
| 51 | 643 else |
| 644 ti.tiargs.setDim(i); | |
| 645 } | |
| 646 | |
| 647 // Temporary Array to hold deduced types | |
| 648 //dedtypes.setDim(parameters.dim); | |
| 649 dedtypes.setDim(td2.parameters.dim); | |
| 650 | |
| 651 // Attempt a type deduction | |
| 652 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 653 if (m) | |
| 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 version (LOG_LEASTAS) { | |
| 662 printf(" matches %d, so is least as specialized\n", m); | |
| 663 } | |
| 664 return m; | |
| 665 } | |
| 666 L1: | |
| 667 version (LOG_LEASTAS) { | |
| 668 printf(" doesn't match, so is not as specialized\n"); | |
| 669 } | |
| 670 return MATCHnomatch; | |
| 0 | 671 } |
| 672 | |
| 673 /************************************************* | |
| 674 * Match function arguments against a specific template function. | |
| 675 * Input: | |
| 676 * loc instantiation location | |
| 677 * targsi Expression/Type initial list of template arguments | |
| 678 * ethis 'this' argument if !null | |
| 679 * fargs arguments to function | |
| 680 * Output: | |
| 681 * dedargs Expression/Type deduced template arguments | |
| 682 * Returns: | |
| 683 * match level | |
| 684 */ | |
| 104 | 685 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) |
| 0 | 686 { |
| 687 size_t nfparams; | |
| 688 size_t nfargs; | |
| 689 size_t nargsi; // array size of targsi | |
| 690 int fptupindex = -1; | |
| 691 int tuple_dim = 0; | |
| 692 MATCH match = MATCHexact; | |
| 693 FuncDeclaration fd = onemember.toAlias().isFuncDeclaration(); | |
| 694 Arguments fparameters; // function parameter list | |
| 695 int fvarargs; // function varargs | |
| 696 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 697 | |
| 79 | 698 static if (false) |
| 699 { | |
| 0 | 700 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); |
| 701 for (i = 0; i < fargs.dim; i++) | |
| 702 { | |
| 703 Expression e = cast(Expression)fargs.data[i]; | |
| 704 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 705 } | |
| 706 printf("fd = %s\n", fd.toChars()); | |
| 707 printf("fd.type = %p\n", fd.type); | |
| 708 } | |
| 709 | |
| 710 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 711 | |
| 712 dedargs.setDim(parameters.dim); | |
| 713 dedargs.zero(); | |
| 714 | |
| 715 dedtypes.setDim(parameters.dim); | |
| 716 dedtypes.zero(); | |
| 717 | |
| 718 // Set up scope for parameters | |
| 719 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 720 paramsym.parent = scope_.parent; | |
| 721 Scope paramscope = scope_.push(paramsym); | |
| 722 | |
| 723 TemplateTupleParameter tp = isVariadic(); | |
| 724 | |
| 79 | 725 static if (false) |
| 726 { | |
| 0 | 727 for (i = 0; i < dedargs.dim; i++) |
| 728 { | |
| 729 printf("\tdedarg[%d] = ", i); | |
| 730 Object oarg = cast(Object)dedargs.data[i]; | |
| 731 if (oarg) printf("%s", oarg.toChars()); | |
| 732 printf("\n"); | |
| 733 } | |
| 734 } | |
| 735 | |
| 736 | |
| 737 nargsi = 0; | |
| 738 if (targsi) | |
| 79 | 739 { |
| 740 // Set initial template arguments | |
| 0 | 741 nargsi = targsi.dim; |
| 79 | 742 size_t n = parameters.dim; |
| 0 | 743 if (tp) |
| 744 n--; | |
| 745 if (nargsi > n) | |
| 746 { | |
| 747 if (!tp) | |
| 748 goto Lnomatch; | |
| 749 | |
| 750 /* The extra initial template arguments | |
| 751 * now form the tuple argument. | |
| 752 */ | |
|
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90
diff
changeset
|
753 auto t = new Tuple(); |
| 0 | 754 assert(parameters.dim); |
|
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parents:
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diff
changeset
|
755 dedargs[parameters.dim - 1] = t; |
| 0 | 756 |
| 757 tuple_dim = nargsi - n; | |
| 758 t.objects.setDim(tuple_dim); | |
| 759 for (size_t i = 0; i < tuple_dim; i++) | |
| 760 { | |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
761 t.objects[i] = targsi[n + i]; |
| 0 | 762 } |
| 763 declareParameter(paramscope, tp, t); | |
| 764 } | |
| 765 else | |
| 766 n = nargsi; | |
| 767 | |
| 768 memcpy(dedargs.data, targsi.data, n * (*dedargs.data).sizeof); | |
| 769 | |
| 770 for (size_t i = 0; i < n; i++) | |
| 771 { | |
| 772 assert(i < parameters.dim); | |
| 773 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 774 MATCH m; | |
| 775 Declaration sparam = null; | |
| 776 | |
| 777 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 778 //printf("\tdeduceType m = %d\n", m); | |
| 779 if (m == MATCHnomatch) | |
| 780 goto Lnomatch; | |
| 781 if (m < match) | |
| 782 match = m; | |
| 783 | |
| 784 sparam.semantic(paramscope); | |
| 785 if (!paramscope.insert(sparam)) | |
| 786 goto Lnomatch; | |
| 787 } | |
| 788 } | |
| 79 | 789 static if (false) |
| 790 { | |
| 0 | 791 for (i = 0; i < dedargs.dim; i++) |
| 792 { | |
| 793 printf("\tdedarg[%d] = ", i); | |
| 794 Object oarg = cast(Object)dedargs.data[i]; | |
| 795 if (oarg) printf("%s", oarg.toChars()); | |
| 796 printf("\n"); | |
| 797 } | |
| 798 } | |
| 799 | |
| 800 if (fd.type) | |
| 801 { | |
| 802 assert(fd.type.ty == Tfunction); | |
| 803 TypeFunction fdtype = cast(TypeFunction)fd.type; | |
| 804 fparameters = fdtype.parameters; | |
| 805 fvarargs = fdtype.varargs; | |
| 806 } | |
| 807 else | |
| 808 { | |
| 809 CtorDeclaration fctor = fd.isCtorDeclaration(); | |
| 810 assert(fctor); | |
| 811 fparameters = fctor.arguments; | |
| 812 fvarargs = fctor.varargs; | |
| 813 } | |
| 814 | |
| 815 nfparams = Argument.dim(fparameters); // number of function parameters | |
| 816 nfargs = fargs ? fargs.dim : 0; // number of function arguments | |
| 817 | |
| 818 /* Check for match of function arguments with variadic template | |
| 819 * parameter, such as: | |
| 820 * | |
| 821 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 822 * void main() { Foo(1,2,3); } | |
| 823 */ | |
| 824 if (tp) // if variadic | |
| 825 { | |
| 79 | 826 if (nfparams == 0 && nfargs != 0) // if no function parameters |
| 0 | 827 { |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
828 auto t = new Tuple(); |
| 0 | 829 //printf("t = %p\n", t); |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
830 dedargs[parameters.dim - 1] = t; |
| 0 | 831 declareParameter(paramscope, tp, t); |
| 832 goto L2; | |
| 833 } | |
| 834 else if (nfargs < nfparams - 1) | |
| 835 goto L1; | |
| 836 else | |
| 837 { | |
| 838 /* Figure out which of the function parameters matches | |
| 839 * the tuple template parameter. Do this by matching | |
| 840 * type identifiers. | |
| 841 * Set the index of this function parameter to fptupindex. | |
| 842 */ | |
| 843 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 844 { | |
| 845 Argument fparam = cast(Argument)fparameters.data[fptupindex]; | |
| 846 if (fparam.type.ty != Tident) | |
| 847 continue; | |
| 848 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 849 if (!tp.ident.equals(tid.ident) || tid.idents.dim) | |
| 850 continue; | |
| 851 | |
| 852 if (fvarargs) // variadic function doesn't | |
| 853 goto Lnomatch; // go with variadic template | |
| 854 | |
| 855 /* The types of the function arguments | |
| 856 * now form the tuple argument. | |
| 857 */ | |
|
94
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
858 auto t = new Tuple(); |
|
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
859 dedargs[parameters.dim - 1] = t; |
| 0 | 860 |
| 861 tuple_dim = nfargs - (nfparams - 1); | |
| 862 t.objects.setDim(tuple_dim); | |
| 863 for (size_t i = 0; i < tuple_dim; i++) | |
| 864 { | |
|
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more Expressions work
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parents:
87
diff
changeset
|
865 auto farg = fargs[fptupindex + i]; |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
866 t.objects[i] = farg.type; |
| 0 | 867 } |
| 868 declareParameter(paramscope, tp, t); | |
| 869 goto L2; | |
| 870 } | |
| 871 fptupindex = -1; | |
| 872 } | |
| 873 } | |
| 874 | |
| 875 L1: | |
| 876 if (nfparams == nfargs) { | |
| 877 ; | |
| 878 } else if (nfargs > nfparams) { | |
| 879 if (fvarargs == 0) | |
| 880 goto Lnomatch; // too many args, no match | |
| 881 match = MATCHconvert; // match ... with a conversion | |
| 882 } | |
| 883 | |
| 884 L2: | |
| 885 version (DMDV2) { | |
| 886 // Match 'ethis' to any TemplateThisParameter's | |
| 887 if (ethis) | |
| 888 { | |
| 889 for (size_t i = 0; i < parameters.dim; i++) | |
| 890 { | |
| 891 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 892 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); | |
| 893 if (ttp) | |
| 894 { | |
| 895 MATCH m; | |
| 896 | |
| 897 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 898 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 899 if (!m) | |
| 900 goto Lnomatch; | |
| 901 if (m < match) | |
| 902 match = m; // pick worst match | |
| 903 } | |
| 904 } | |
| 905 } | |
| 906 } | |
| 907 | |
| 908 // Loop through the function parameters | |
| 909 for (size_t i = 0; i < nfparams; i++) | |
| 910 { | |
| 911 /* Skip over function parameters which wound up | |
| 912 * as part of a template tuple parameter. | |
| 913 */ | |
| 914 if (i == fptupindex) | |
| 915 { | |
| 916 if (fptupindex == nfparams - 1) | |
| 917 break; | |
| 918 i += tuple_dim - 1; | |
| 919 continue; | |
| 920 } | |
| 921 | |
| 922 Argument fparam = Argument.getNth(fparameters, i); | |
| 923 | |
| 924 if (i >= nfargs) // if not enough arguments | |
| 925 { | |
| 926 if (fparam.defaultArg) | |
| 927 { | |
| 928 /* Default arguments do not participate in template argument | |
| 929 * deduction. | |
| 930 */ | |
| 931 goto Lmatch; | |
| 932 } | |
| 933 } | |
| 934 else | |
| 935 { | |
|
90
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more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
87
diff
changeset
|
936 auto farg = fargs[i]; |
| 0 | 937 static if (false) { |
| 938 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 939 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 940 } | |
| 941 Type argtype = farg.type; | |
| 942 | |
| 943 version (DMDV2) { | |
| 944 /* Allow string literals which are type [] to match with [dim] | |
| 945 */ | |
| 946 if (farg.op == TOKstring) | |
| 947 { | |
| 948 StringExp se = cast(StringExp)farg; | |
| 949 if (!se.committed && argtype.ty == Tarray && | |
| 950 fparam.type.toBasetype().ty == Tsarray) | |
| 951 { | |
| 952 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 953 argtype = argtype.semantic(se.loc, null); | |
| 954 argtype = argtype.invariantOf(); | |
| 955 } | |
| 956 } | |
| 957 } | |
| 958 | |
| 959 MATCH m; | |
| 960 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 961 //printf("\tdeduceType m = %d\n", m); | |
| 962 | |
| 963 /* If no match, see if there's a conversion to a delegate | |
| 964 */ | |
| 965 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 966 { | |
| 967 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 968 TypeFunction tf = cast(TypeFunction)td.next; | |
| 969 | |
| 970 if (!tf.varargs && Argument.dim(tf.parameters) == 0) | |
| 971 { | |
| 972 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 973 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 974 m = MATCHconvert; | |
| 975 } | |
| 976 //printf("\tm2 = %d\n", m); | |
| 977 } | |
| 978 | |
| 979 if (m) | |
| 980 { | |
| 981 if (m < match) | |
| 982 match = m; // pick worst match | |
| 983 continue; | |
| 984 } | |
| 985 } | |
| 986 | |
| 987 /* The following code for variadic arguments closely | |
| 988 * matches TypeFunction.callMatch() | |
| 989 */ | |
| 990 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 991 goto Lnomatch; | |
| 992 | |
| 993 /* Check for match with function parameter T... | |
| 994 */ | |
| 995 Type tb = fparam.type.toBasetype(); | |
| 996 switch (tb.ty) | |
| 997 { | |
| 998 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 999 case Tsarray: | |
| 1000 { | |
| 1001 TypeSArray tsa = cast(TypeSArray)tb; | |
| 1002 ulong sz = tsa.dim.toInteger(); | |
| 1003 if (sz != nfargs - i) | |
| 1004 goto Lnomatch; | |
| 1005 } | |
| 1006 case Tarray: | |
| 1007 { | |
| 1008 TypeArray ta = cast(TypeArray)tb; | |
| 1009 for (; i < nfargs; i++) | |
| 1010 { | |
|
90
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more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
87
diff
changeset
|
1011 auto arg = fargs[i]; |
| 0 | 1012 assert(arg); |
| 1013 MATCH m; | |
| 1014 /* If lazy array of delegates, | |
| 1015 * convert arg(s) to delegate(s) | |
| 1016 */ | |
| 1017 Type tret = fparam.isLazyArray(); | |
| 1018 if (tret) | |
| 1019 { | |
| 1020 if (ta.next.equals(arg.type)) | |
| 1021 { | |
| 1022 m = MATCHexact; | |
| 1023 } | |
| 1024 else | |
| 1025 { | |
| 1026 m = arg.implicitConvTo(tret); | |
| 1027 if (m == MATCHnomatch) | |
| 1028 { | |
| 1029 if (tret.toBasetype().ty == Tvoid) | |
| 1030 m = MATCHconvert; | |
| 1031 } | |
| 1032 } | |
| 1033 } | |
| 1034 else | |
| 1035 { | |
| 1036 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 1037 //m = arg.implicitConvTo(ta.next); | |
| 1038 } | |
| 1039 if (m == MATCHnomatch) | |
| 1040 goto Lnomatch; | |
| 1041 if (m < match) | |
| 1042 match = m; | |
| 1043 } | |
| 1044 goto Lmatch; | |
| 1045 } | |
| 1046 case Tclass: | |
| 1047 case Tident: | |
| 1048 goto Lmatch; | |
| 1049 | |
| 1050 default: | |
| 1051 goto Lnomatch; | |
| 1052 } | |
| 1053 } | |
| 1054 | |
| 1055 Lmatch: | |
| 1056 | |
| 1057 /* Fill in any missing arguments with their defaults. | |
| 1058 */ | |
| 1059 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 1060 { | |
| 1061 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 1062 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); | |
| 1063 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 1064 * But for function templates, we really need them to match | |
| 1065 */ | |
| 1066 Object oarg = cast(Object)dedargs.data[i]; | |
| 1067 Object oded = cast(Object)dedtypes.data[i]; | |
| 1068 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); | |
| 1069 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 1070 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 1071 if (!oarg) | |
| 1072 { | |
| 1073 if (oded) | |
| 1074 { | |
| 1075 if (tp2.specialization()) | |
| 1076 { | |
| 1077 /* The specialization can work as long as afterwards | |
| 1078 * the oded == oarg | |
| 1079 */ | |
| 1080 Declaration sparam; | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1081 dedargs[i] = oded; |
| 0 | 1082 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); |
| 1083 //printf("m2 = %d\n", m2); | |
| 1084 if (!m2) | |
| 1085 goto Lnomatch; | |
| 1086 if (m2 < match) | |
| 1087 match = m2; // pick worst match | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1088 if (dedtypes[i] !is oded) |
| 0 | 1089 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); |
| 1090 } | |
| 1091 } | |
| 1092 else | |
| 1093 { | |
| 1094 oded = tp2.defaultArg(loc, paramscope); | |
| 1095 if (!oded) | |
| 1096 goto Lnomatch; | |
| 1097 } | |
| 1098 declareParameter(paramscope, tp2, oded); | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1099 dedargs[i] = oded; |
| 0 | 1100 } |
| 1101 } | |
| 1102 | |
| 1103 version (DMDV2) { | |
| 1104 if (constraint) | |
| 1105 { /* Check to see if constraint is satisfied. | |
| 1106 */ | |
| 1107 Expression e = constraint.syntaxCopy(); | |
| 1108 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1109 e = e.semantic(paramscope); | |
| 1110 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1111 if (e.isBool(true)) { | |
| 1112 ; | |
| 1113 } else if (e.isBool(false)) | |
| 1114 goto Lnomatch; | |
| 1115 else | |
| 1116 { | |
| 1117 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1118 } | |
| 1119 } | |
| 1120 } | |
| 1121 | |
| 1122 static if (false) { | |
| 1123 for (i = 0; i < dedargs.dim; i++) | |
| 1124 { | |
| 1125 Type t = cast(Type)dedargs.data[i]; | |
| 1126 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1127 } | |
| 1128 } | |
| 1129 | |
| 1130 paramscope.pop(); | |
| 1131 //printf("\tmatch %d\n", match); | |
| 1132 return match; | |
| 1133 | |
| 1134 Lnomatch: | |
| 1135 paramscope.pop(); | |
| 1136 //printf("\tnomatch\n"); | |
| 1137 return MATCHnomatch; | |
| 1138 } | |
| 104 | 1139 |
| 0 | 1140 /************************************************* |
| 1141 * Given function arguments, figure out which template function | |
| 1142 * to expand, and return that function. | |
| 1143 * If no match, give error message and return null. | |
| 1144 * Input: | |
| 1145 * sc instantiation scope | |
| 1146 * loc instantiation location | |
| 1147 * targsi initial list of template arguments | |
| 1148 * ethis if !null, the 'this' pointer argument | |
| 1149 * fargs arguments to function | |
| 1150 * flags 1: do not issue error message on no match, just return null | |
| 1151 */ | |
| 1152 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1153 { | |
| 1154 MATCH m_best = MATCHnomatch; | |
| 1155 TemplateDeclaration td_ambig = null; | |
| 1156 TemplateDeclaration td_best = null; | |
| 1157 Objects tdargs = new Objects(); | |
| 1158 TemplateInstance ti; | |
| 1159 FuncDeclaration fd; | |
| 1160 | |
| 1161 static if (false) { | |
| 1162 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 104 | 1163 printf(" targsi:\n"); |
| 0 | 1164 if (targsi) |
| 1165 { | |
| 1166 for (int i = 0; i < targsi.dim; i++) | |
| 1167 { | |
| 1168 Object arg = cast(Object)targsi.data[i]; | |
| 1169 printf("\t%s\n", arg.toChars()); | |
| 1170 } | |
| 1171 } | |
| 104 | 1172 printf(" fargs:\n"); |
| 0 | 1173 for (int i = 0; i < fargs.dim; i++) |
| 1174 { | |
| 1175 Expression arg = cast(Expression)fargs.data[i]; | |
| 1176 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1177 //printf("\tty = %d\n", arg.type.ty); | |
| 1178 } | |
| 1179 } | |
| 1180 | |
| 1181 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1182 { | |
| 1183 if (!td.semanticRun) | |
| 1184 { | |
| 1185 error("forward reference to template %s", td.toChars()); | |
| 1186 goto Lerror; | |
| 1187 } | |
| 1188 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1189 { | |
| 1190 error("is not a function template"); | |
| 1191 goto Lerror; | |
| 1192 } | |
| 1193 | |
| 1194 MATCH m; | |
| 1195 scope Objects dedargs = new Objects(); | |
| 1196 | |
| 1197 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1198 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1199 if (!m) // if no match | |
| 1200 continue; | |
| 1201 | |
| 1202 if (m < m_best) | |
| 1203 goto Ltd_best; | |
| 1204 if (m > m_best) | |
| 1205 goto Ltd; | |
| 1206 | |
| 1207 { | |
| 1208 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1209 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1210 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1211 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1212 | |
| 1213 if (c1 > c2) | |
| 1214 goto Ltd; | |
| 1215 else if (c1 < c2) | |
| 1216 goto Ltd_best; | |
| 1217 else | |
| 1218 goto Lambig; | |
| 1219 } | |
| 1220 | |
| 1221 Lambig: // td_best and td are ambiguous | |
| 1222 td_ambig = td; | |
| 1223 continue; | |
| 1224 | |
| 1225 Ltd_best: // td_best is the best match so far | |
| 1226 td_ambig = null; | |
| 1227 continue; | |
| 1228 | |
| 1229 Ltd: // td is the new best match | |
| 1230 td_ambig = null; | |
| 1231 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1232 td_best = td; | |
| 1233 m_best = m; | |
| 1234 tdargs.setDim(dedargs.dim); | |
| 1235 memcpy(tdargs.data, dedargs.data, tdargs.dim * (void*).sizeof); | |
| 1236 continue; | |
| 1237 } | |
| 1238 if (!td_best) | |
| 1239 { | |
| 1240 if (!(flags & 1)) | |
| 1241 error(loc, "does not match any function template declaration"); | |
| 1242 goto Lerror; | |
| 1243 } | |
| 1244 if (td_ambig) | |
| 1245 { | |
| 1246 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1247 td_best.toChars(), td_ambig.toChars()); | |
| 1248 } | |
| 1249 | |
| 1250 /* The best match is td_best with arguments tdargs. | |
| 1251 * Now instantiate the template. | |
| 1252 */ | |
| 1253 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1254 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1255 ti.semantic(sc); | |
| 1256 fd = ti.toAlias().isFuncDeclaration(); | |
| 1257 if (!fd) | |
| 1258 goto Lerror; | |
| 1259 return fd; | |
| 1260 | |
| 1261 Lerror: | |
| 1262 /// version (DMDV2) { | |
| 1263 if (!(flags & 1)) | |
| 1264 /// } | |
| 1265 { | |
| 1266 HdrGenState hgs; | |
| 1267 | |
| 1268 scope OutBuffer bufa = new OutBuffer(); | |
| 1269 Objects args = targsi; | |
| 1270 if (args) | |
| 1271 { | |
| 1272 for (int i = 0; i < args.dim; i++) | |
| 1273 { | |
| 1274 if (i) | |
| 1275 bufa.writeByte(','); | |
| 1276 Object oarg = cast(Object)args.data[i]; | |
| 1277 ObjectToCBuffer(bufa, &hgs, oarg); | |
| 1278 } | |
| 1279 } | |
| 1280 | |
| 1281 scope OutBuffer buf = new OutBuffer(); | |
| 1282 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1283 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1284 } | |
| 1285 return null; | |
| 1286 } | |
| 1287 | |
| 1288 /************************************************** | |
| 1289 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1290 */ | |
| 104 | 1291 void declareParameter(Scope sc, TemplateParameter tp, Object o) |
| 0 | 1292 { |
| 1293 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1294 | |
| 1295 Type targ = isType(o); | |
| 1296 Expression ea = isExpression(o); | |
| 1297 Dsymbol sa = isDsymbol(o); | |
| 1298 Tuple va = isTuple(o); | |
| 1299 | |
| 1300 Dsymbol s; | |
| 1301 | |
| 1302 // See if tp.ident already exists with a matching definition | |
| 1303 Dsymbol scopesym; | |
| 1304 s = sc.search(loc, tp.ident, &scopesym); | |
| 1305 if (s && scopesym == sc.scopesym) | |
| 1306 { | |
| 1307 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1308 if (va && td) | |
| 1309 { | |
| 1310 Tuple tup = new Tuple(); | |
| 1311 assert(false); // < not implemented | |
| 1312 ///tup.objects = *td.objects; | |
| 1313 if (match(va, tup, this, sc)) | |
| 1314 { | |
| 1315 return; | |
| 1316 } | |
| 1317 } | |
| 1318 } | |
| 1319 | |
| 1320 if (targ) | |
| 1321 { | |
| 1322 //printf("type %s\n", targ.toChars()); | |
| 1323 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1324 } | |
| 1325 else if (sa) | |
| 1326 { | |
| 1327 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1328 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1329 } | |
| 1330 else if (ea) | |
| 1331 { | |
| 1332 // tdtypes.data[i] always matches ea here | |
| 1333 Initializer init = new ExpInitializer(loc, ea); | |
| 1334 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1335 | |
| 1336 Type t = tvp ? tvp.valType : null; | |
| 1337 | |
| 1338 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1339 v.storage_class = STCmanifest; | |
| 1340 s = v; | |
| 1341 } | |
| 1342 else if (va) | |
| 1343 { | |
| 1344 //printf("\ttuple\n"); | |
| 1345 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1346 } | |
| 1347 else | |
| 1348 { | |
| 1349 debug writefln(o.toString()); | |
| 1350 assert(0); | |
| 1351 } | |
| 1352 | |
| 1353 if (!sc.insert(s)) | |
| 1354 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1355 | |
| 1356 s.semantic(sc); | |
| 1357 } | |
| 1358 | |
| 104 | 1359 override TemplateDeclaration isTemplateDeclaration() { return this; } |
| 0 | 1360 |
| 104 | 1361 TemplateTupleParameter isVariadic() |
| 0 | 1362 { |
| 1363 return .isVariadic(parameters); | |
| 1364 } | |
| 1365 | |
| 63 | 1366 /*********************************** |
| 1367 * We can overload templates. | |
| 1368 */ | |
| 104 | 1369 override bool isOverloadable() |
| 0 | 1370 { |
| 104 | 1371 return true; |
| 0 | 1372 } |
| 72 | 1373 } |