Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 126:1765f3ef917d
ClassDeclarations, Arguments -> Vector
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Fri, 03 Sep 2010 23:25:55 +0100 |
| parents | 347de076ad34 |
| children | e6e542f37b94 |
| 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) |
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60 tp = parameters[dim - 1].isTemplateTupleParameter(); |
| 0 | 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 { | |
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168 auto tp = parameters[i]; |
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169 p[i] = tp.syntaxCopy(); |
| 51 | 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); | |
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231 foreach (size_t i, TemplateParameter tp; parameters) |
| 0 | 232 { |
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233 origParameters[i] = tp.syntaxCopy(); |
| 0 | 234 } |
| 235 } | |
| 236 | |
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237 foreach (tp; parameters) |
| 0 | 238 { |
| 239 tp.declareParameter(paramscope); | |
| 240 } | |
| 241 | |
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242 foreach (size_t i, TemplateParameter tp; parameters) |
| 0 | 243 { |
| 244 tp.semantic(paramscope); | |
| 245 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 246 error("template tuple parameter must be last one"); | |
| 247 } | |
| 248 | |
| 249 paramscope.pop(); | |
| 250 | |
| 251 if (members) | |
| 252 { | |
| 253 Dsymbol s; | |
| 254 if (Dsymbol.oneMembers(members, &s)) | |
| 255 { | |
| 256 if (s && s.ident && s.ident.equals(ident)) | |
| 257 { | |
| 258 onemember = s; | |
| 259 s.parent = this; | |
| 260 } | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 /* BUG: should check: | |
| 265 * o no virtual functions or non-static data members of classes | |
| 266 */ | |
| 267 } | |
| 268 | |
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269 /********************************** |
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270 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
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271 * Return !=0 if successful; i.e. no conflict. |
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272 */ |
| 104 | 273 override bool overloadInsert(Dsymbol s) |
| 0 | 274 { |
| 50 | 275 TemplateDeclaration *pf; |
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276 TemplateDeclaration f; |
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277 |
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278 version (LOG) { |
| 50 | 279 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
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280 } |
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281 f = s.isTemplateDeclaration(); |
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282 if (!f) |
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283 return false; |
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284 |
| 50 | 285 TemplateDeclaration pthis = this; |
| 286 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
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287 { |
| 50 | 288 static if (false) { |
| 289 // Conflict if TemplateParameter's match | |
| 290 // Will get caught anyway later with TemplateInstance, but | |
| 291 // should check it now. | |
| 292 if (f.parameters.dim != f2.parameters.dim) | |
| 293 goto Lcontinue; | |
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294 |
| 50 | 295 for (int i = 0; i < f.parameters.dim; i++) |
| 296 { | |
| 297 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 298 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
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299 |
| 50 | 300 if (!p1.overloadMatch(p2)) |
| 301 goto Lcontinue; | |
| 302 } | |
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303 |
| 50 | 304 version (LOG) { |
| 305 printf("\tfalse: conflict\n"); | |
| 306 } | |
| 307 return false; | |
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308 |
| 50 | 309 Lcontinue: |
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310 ; |
| 50 | 311 } |
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312 } |
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313 |
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314 f.overroot = this; |
| 50 | 315 *pf = f; |
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316 version (LOG) { |
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317 printf("\ttrue: no conflict\n"); |
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318 } |
| 50 | 319 |
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320 return true; |
| 0 | 321 } |
| 322 | |
| 104 | 323 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 324 { |
| 104 | 325 static if (false) // Should handle template functions |
| 326 { | |
| 327 if (onemember && onemember.isFuncDeclaration()) | |
| 328 buf.writestring("foo "); | |
| 329 } | |
| 330 buf.writestring(kind()); | |
| 331 buf.writeByte(' '); | |
| 332 buf.writestring(ident.toChars()); | |
| 333 buf.writeByte('('); | |
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334 foreach (size_t i, TemplateParameter tp; parameters) |
| 104 | 335 { |
| 336 if (hgs.ddoc) | |
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337 tp = origParameters[i]; |
| 104 | 338 if (i) |
| 339 buf.writeByte(','); | |
| 340 tp.toCBuffer(buf, hgs); | |
| 341 } | |
| 342 buf.writeByte(')'); | |
| 343 version(DMDV2) | |
| 344 { | |
| 345 if (constraint) | |
| 346 { buf.writestring(" if ("); | |
| 347 constraint.toCBuffer(buf, hgs); | |
| 348 buf.writeByte(')'); | |
| 349 } | |
| 350 } | |
| 351 | |
| 352 if (hgs.hdrgen) | |
| 353 { | |
| 354 hgs.tpltMember++; | |
| 355 buf.writenl(); | |
| 356 buf.writebyte('{'); | |
| 357 buf.writenl(); | |
| 358 foreach (Dsymbol s; members) | |
| 359 s.toCBuffer(buf, hgs); | |
| 360 | |
| 361 buf.writebyte('}'); | |
| 362 buf.writenl(); | |
| 363 hgs.tpltMember--; | |
| 364 } | |
| 0 | 365 } |
| 366 | |
| 79 | 367 override void toJsonBuffer(OutBuffer buf) |
| 368 { | |
| 369 //writef("TemplateDeclaration.toJsonBuffer()\n"); | |
| 370 | |
| 371 buf.writestring("{\n"); | |
| 372 | |
| 373 JsonProperty(buf, Pname, toChars()); | |
| 374 JsonProperty(buf, Pkind, kind()); | |
| 375 if (comment) | |
| 376 JsonProperty(buf, Pcomment, comment); | |
| 377 | |
| 378 if (loc.linnum) | |
| 379 JsonProperty(buf, Pline, loc.linnum); | |
| 380 | |
| 381 JsonString(buf, Pmembers); | |
| 382 buf.writestring(" : [\n"); | |
| 383 size_t offset = buf.offset; | |
| 384 foreach (Dsymbol s; members) | |
| 385 { | |
| 386 if (offset != buf.offset) | |
| 96 | 387 { buf.writestring(",\n"); |
| 79 | 388 offset = buf.offset; |
| 389 } | |
| 390 s.toJsonBuffer(buf); | |
| 391 } | |
| 96 | 392 JsonRemoveComma(buf); |
| 79 | 393 buf.writestring("]\n"); |
| 394 | |
| 395 buf.writestring("}\n"); | |
| 396 } | |
| 397 | |
| 104 | 398 override string kind() |
| 0 | 399 { |
| 50 | 400 return (onemember && onemember.isAggregateDeclaration()) |
| 401 ? onemember.kind() | |
| 402 : "template"; | |
| 0 | 403 } |
| 404 | |
| 104 | 405 override string toChars() |
| 0 | 406 { |
| 49 | 407 OutBuffer buf = new OutBuffer(); |
| 408 HdrGenState hgs; | |
| 409 | |
| 410 /// memset(&hgs, 0, hgs.sizeof); | |
| 411 buf.writestring(ident.toChars()); | |
| 412 buf.writeByte('('); | |
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413 foreach (size_t i, TemplateParameter tp; parameters) |
| 49 | 414 { |
| 415 if (i) | |
| 416 buf.writeByte(','); | |
| 417 tp.toCBuffer(buf, &hgs); | |
| 418 } | |
| 419 buf.writeByte(')'); | |
| 420 version (DMDV2) { | |
| 421 if (constraint) | |
| 422 { | |
| 423 buf.writestring(" if ("); | |
| 424 constraint.toCBuffer(buf, &hgs); | |
| 425 buf.writeByte(')'); | |
| 426 } | |
| 427 } | |
| 428 buf.writeByte(0); | |
| 429 return buf.extractString(); | |
| 0 | 430 } |
| 431 | |
| 104 | 432 override void emitComment(Scope sc) |
| 0 | 433 { |
| 434 assert(false); | |
| 435 } | |
| 50 | 436 |
| 104 | 437 // void toDocBuffer(OutBuffer *buf); |
| 0 | 438 |
| 439 /*************************************** | |
| 440 * Given that ti is an instance of this TemplateDeclaration, | |
| 441 * deduce the types of the parameters to this, and store | |
| 442 * those deduced types in dedtypes[]. | |
| 443 * Input: | |
| 444 * flag 1: don't do semantic() because of dummy types | |
| 445 * 2: don't change types in matchArg() | |
| 446 * Output: | |
| 447 * dedtypes deduced arguments | |
| 448 * Return match level. | |
| 449 */ | |
| 104 | 450 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) |
| 0 | 451 { |
| 452 MATCH m; | |
| 453 int dedtypes_dim = dedtypes.dim; | |
| 454 | |
| 455 version (LOGM) { | |
| 50 | 456 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 457 } |
| 458 | |
| 459 static if (false) { | |
| 460 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 461 if (ti.tiargs.dim) | |
| 462 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 463 } | |
| 464 dedtypes.zero(); | |
| 465 | |
| 466 int parameters_dim = parameters.dim; | |
| 467 int variadic = isVariadic() !is null; | |
| 468 | |
| 469 // If more arguments than parameters, no match | |
| 470 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 471 { | |
| 472 version (LOGM) { | |
| 50 | 473 printf(" no match: more arguments than parameters\n"); |
| 0 | 474 } |
| 50 | 475 return MATCHnomatch; |
| 0 | 476 } |
| 477 | |
| 478 assert(dedtypes_dim == parameters_dim); | |
| 479 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 480 | |
| 481 // Set up scope for parameters | |
| 482 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 483 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 484 paramsym.parent = scope_.parent; | |
| 485 Scope paramscope = scope_.push(paramsym); | |
| 486 paramscope.stc = STCundefined; | |
| 487 | |
| 488 // Attempt type deduction | |
| 489 m = MATCHexact; | |
| 490 for (int i = 0; i < dedtypes_dim; i++) | |
| 491 { | |
| 492 MATCH m2; | |
|
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|
493 auto tp = parameters[i]; |
| 0 | 494 Declaration sparam; |
| 495 | |
| 496 //printf("\targument [%d]\n", i); | |
| 497 version (LOGM) { | |
| 498 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 499 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 500 if (ttp) | |
| 501 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 502 } | |
| 503 | |
| 504 version (DMDV1) { | |
| 505 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 506 } else { | |
| 507 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 508 } | |
| 509 //printf("\tm2 = %d\n", m2); | |
| 510 | |
| 511 if (m2 == MATCHnomatch) | |
| 512 { | |
| 513 static if (false) { | |
| 514 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 515 } | |
| 516 goto Lnomatch; | |
| 517 } | |
| 518 | |
| 519 if (m2 < m) | |
| 520 m = m2; | |
| 521 | |
| 522 if (!flag) | |
| 523 sparam.semantic(paramscope); | |
| 524 if (!paramscope.insert(sparam)) | |
| 525 goto Lnomatch; | |
| 526 } | |
| 527 | |
| 528 if (!flag) | |
| 529 { | |
| 530 /* Any parameter left without a type gets the type of | |
| 531 * its corresponding arg | |
| 532 */ | |
| 533 for (int i = 0; i < dedtypes_dim; i++) | |
| 534 { | |
|
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535 if (!dedtypes[i]) |
| 0 | 536 { |
| 537 assert(i < ti.tiargs.dim); | |
|
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538 dedtypes[i] = ti.tiargs[i]; |
| 0 | 539 } |
| 540 } | |
| 541 } | |
| 542 | |
| 543 version (DMDV2) { | |
| 544 if (m && constraint && !(flag & 1)) | |
| 545 { /* Check to see if constraint is satisfied. | |
| 546 */ | |
| 547 Expression e = constraint.syntaxCopy(); | |
| 548 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 549 e = e.semantic(paramscope); | |
| 550 e = e.optimize(WANTvalue | WANTinterpret); | |
| 551 if (e.isBool(true)) { | |
| 552 ; | |
| 553 } else if (e.isBool(false)) | |
| 554 goto Lnomatch; | |
| 555 else | |
| 556 { | |
| 557 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 558 } | |
| 559 } | |
| 560 } | |
| 561 | |
| 562 version (LOGM) { | |
| 563 // Print out the results | |
| 564 printf("--------------------------\n"); | |
| 565 printf("template %s\n", toChars()); | |
| 566 printf("instance %s\n", ti.toChars()); | |
| 567 if (m) | |
| 568 { | |
| 569 for (int i = 0; i < dedtypes_dim; i++) | |
| 570 { | |
| 571 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 572 Object oarg; | |
| 573 | |
| 574 printf(" [%d]", i); | |
| 575 | |
| 576 if (i < ti.tiargs.dim) | |
| 577 oarg = cast(Object)ti.tiargs.data[i]; | |
| 578 else | |
| 579 oarg = null; | |
| 580 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 581 } | |
| 582 } | |
| 583 else | |
| 584 goto Lnomatch; | |
| 585 } | |
| 586 | |
| 587 version (LOGM) { | |
| 588 printf(" match = %d\n", m); | |
| 589 } | |
| 590 goto Lret; | |
| 591 | |
| 592 Lnomatch: | |
| 593 version (LOGM) { | |
| 594 printf(" no match\n"); | |
| 595 } | |
| 596 m = MATCHnomatch; | |
| 597 | |
| 598 Lret: | |
| 599 paramscope.pop(); | |
| 600 version (LOGM) { | |
| 601 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 602 } | |
| 603 return m; | |
| 604 } | |
| 605 | |
| 51 | 606 /******************************************** |
| 607 * Determine partial specialization order of 'this' vs td2. | |
| 608 * Returns: | |
| 609 * match this is at least as specialized as td2 | |
| 610 * 0 td2 is more specialized than this | |
| 611 */ | |
| 104 | 612 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 0 | 613 { |
| 104 | 614 /* This works by taking the template parameters to this template |
| 51 | 615 * declaration and feeding them to td2 as if it were a template |
| 616 * instance. | |
| 617 * If it works, then this template is at least as specialized | |
| 618 * as td2. | |
| 619 */ | |
| 620 | |
| 621 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 622 scope Objects dedtypes = new Objects(); | |
| 623 | |
| 624 version (LOG_LEASTAS) { | |
| 625 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 626 } | |
| 627 | |
| 628 // Set type arguments to dummy template instance to be types | |
| 629 // generated from the parameters to this template declaration | |
| 630 ti.tiargs = new Objects(); | |
| 631 ti.tiargs.setDim(parameters.dim); | |
| 632 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 633 { | |
|
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634 auto tp = parameters[i]; |
| 51 | 635 |
|
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636 auto p = tp.dummyArg(); |
| 51 | 637 if (p) |
|
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|
638 ti.tiargs[i] = p; |
| 51 | 639 else |
| 640 ti.tiargs.setDim(i); | |
| 641 } | |
| 642 | |
| 643 // Temporary Array to hold deduced types | |
| 644 //dedtypes.setDim(parameters.dim); | |
| 645 dedtypes.setDim(td2.parameters.dim); | |
| 646 | |
| 647 // Attempt a type deduction | |
| 648 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 649 if (m) | |
| 650 { | |
| 651 /* A non-variadic template is more specialized than a | |
| 652 * variadic one. | |
| 653 */ | |
| 654 if (isVariadic() && !td2.isVariadic()) | |
| 655 goto L1; | |
| 656 | |
| 657 version (LOG_LEASTAS) { | |
| 658 printf(" matches %d, so is least as specialized\n", m); | |
| 659 } | |
| 660 return m; | |
| 661 } | |
| 662 L1: | |
| 663 version (LOG_LEASTAS) { | |
| 664 printf(" doesn't match, so is not as specialized\n"); | |
| 665 } | |
| 666 return MATCHnomatch; | |
| 0 | 667 } |
| 668 | |
| 669 /************************************************* | |
| 670 * Match function arguments against a specific template function. | |
| 671 * Input: | |
| 672 * loc instantiation location | |
| 673 * targsi Expression/Type initial list of template arguments | |
| 674 * ethis 'this' argument if !null | |
| 675 * fargs arguments to function | |
| 676 * Output: | |
| 677 * dedargs Expression/Type deduced template arguments | |
| 678 * Returns: | |
| 679 * match level | |
| 680 */ | |
| 104 | 681 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) |
| 0 | 682 { |
| 683 size_t nfparams; | |
| 684 size_t nfargs; | |
| 685 size_t nargsi; // array size of targsi | |
| 686 int fptupindex = -1; | |
| 687 int tuple_dim = 0; | |
| 688 MATCH match = MATCHexact; | |
| 689 FuncDeclaration fd = onemember.toAlias().isFuncDeclaration(); | |
| 690 Arguments fparameters; // function parameter list | |
| 691 int fvarargs; // function varargs | |
| 692 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 693 | |
| 79 | 694 static if (false) |
| 695 { | |
| 0 | 696 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); |
| 697 for (i = 0; i < fargs.dim; i++) | |
| 698 { | |
| 699 Expression e = cast(Expression)fargs.data[i]; | |
| 700 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 701 } | |
| 702 printf("fd = %s\n", fd.toChars()); | |
| 703 printf("fd.type = %p\n", fd.type); | |
| 704 } | |
| 705 | |
| 706 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 707 | |
| 708 dedargs.setDim(parameters.dim); | |
| 709 dedargs.zero(); | |
| 710 | |
| 711 dedtypes.setDim(parameters.dim); | |
| 712 dedtypes.zero(); | |
| 713 | |
| 714 // Set up scope for parameters | |
| 715 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 716 paramsym.parent = scope_.parent; | |
| 717 Scope paramscope = scope_.push(paramsym); | |
| 718 | |
| 719 TemplateTupleParameter tp = isVariadic(); | |
| 720 | |
| 79 | 721 static if (false) |
| 722 { | |
| 0 | 723 for (i = 0; i < dedargs.dim; i++) |
| 724 { | |
| 725 printf("\tdedarg[%d] = ", i); | |
| 726 Object oarg = cast(Object)dedargs.data[i]; | |
| 727 if (oarg) printf("%s", oarg.toChars()); | |
| 728 printf("\n"); | |
| 729 } | |
| 730 } | |
| 731 | |
| 732 | |
| 733 nargsi = 0; | |
| 734 if (targsi) | |
| 79 | 735 { |
| 736 // Set initial template arguments | |
| 0 | 737 nargsi = targsi.dim; |
| 79 | 738 size_t n = parameters.dim; |
| 0 | 739 if (tp) |
| 740 n--; | |
| 741 if (nargsi > n) | |
| 742 { | |
| 743 if (!tp) | |
| 744 goto Lnomatch; | |
| 745 | |
| 746 /* The extra initial template arguments | |
| 747 * now form the tuple argument. | |
| 748 */ | |
|
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|
749 auto t = new Tuple(); |
| 0 | 750 assert(parameters.dim); |
|
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changeset
|
751 dedargs[parameters.dim - 1] = t; |
| 0 | 752 |
| 753 tuple_dim = nargsi - n; | |
| 754 t.objects.setDim(tuple_dim); | |
| 755 for (size_t i = 0; i < tuple_dim; i++) | |
| 756 { | |
|
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diff
changeset
|
757 t.objects[i] = targsi[n + i]; |
| 0 | 758 } |
| 759 declareParameter(paramscope, tp, t); | |
| 760 } | |
| 761 else | |
| 762 n = nargsi; | |
| 763 | |
|
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|
764 memcpy(dedargs.ptr, targsi.ptr, n * (*dedargs.ptr).sizeof); |
| 0 | 765 |
| 766 for (size_t i = 0; i < n; i++) | |
| 767 { | |
| 768 assert(i < parameters.dim); | |
|
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|
769 auto tp2 = parameters[i]; |
| 0 | 770 MATCH m; |
| 771 Declaration sparam = null; | |
| 772 | |
| 773 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 774 //printf("\tdeduceType m = %d\n", m); | |
| 775 if (m == MATCHnomatch) | |
| 776 goto Lnomatch; | |
| 777 if (m < match) | |
| 778 match = m; | |
| 779 | |
| 780 sparam.semantic(paramscope); | |
| 781 if (!paramscope.insert(sparam)) | |
| 782 goto Lnomatch; | |
| 783 } | |
| 784 } | |
| 79 | 785 static if (false) |
| 786 { | |
| 0 | 787 for (i = 0; i < dedargs.dim; i++) |
| 788 { | |
| 789 printf("\tdedarg[%d] = ", i); | |
| 790 Object oarg = cast(Object)dedargs.data[i]; | |
| 791 if (oarg) printf("%s", oarg.toChars()); | |
| 792 printf("\n"); | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 if (fd.type) | |
| 797 { | |
| 798 assert(fd.type.ty == Tfunction); | |
| 799 TypeFunction fdtype = cast(TypeFunction)fd.type; | |
| 800 fparameters = fdtype.parameters; | |
| 801 fvarargs = fdtype.varargs; | |
| 802 } | |
| 803 else | |
| 804 { | |
| 805 CtorDeclaration fctor = fd.isCtorDeclaration(); | |
| 806 assert(fctor); | |
| 807 fparameters = fctor.arguments; | |
| 808 fvarargs = fctor.varargs; | |
| 809 } | |
| 810 | |
| 811 nfparams = Argument.dim(fparameters); // number of function parameters | |
| 812 nfargs = fargs ? fargs.dim : 0; // number of function arguments | |
| 813 | |
| 814 /* Check for match of function arguments with variadic template | |
| 815 * parameter, such as: | |
| 816 * | |
| 817 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 818 * void main() { Foo(1,2,3); } | |
| 819 */ | |
| 820 if (tp) // if variadic | |
| 821 { | |
| 79 | 822 if (nfparams == 0 && nfargs != 0) // if no function parameters |
| 0 | 823 { |
|
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diff
changeset
|
824 auto t = new Tuple(); |
| 0 | 825 //printf("t = %p\n", t); |
|
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90
diff
changeset
|
826 dedargs[parameters.dim - 1] = t; |
| 0 | 827 declareParameter(paramscope, tp, t); |
| 828 goto L2; | |
| 829 } | |
| 830 else if (nfargs < nfparams - 1) | |
| 831 goto L1; | |
| 832 else | |
| 833 { | |
| 834 /* Figure out which of the function parameters matches | |
| 835 * the tuple template parameter. Do this by matching | |
| 836 * type identifiers. | |
| 837 * Set the index of this function parameter to fptupindex. | |
| 838 */ | |
| 839 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 840 { | |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
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|
841 auto fparam = fparameters[fptupindex]; |
| 0 | 842 if (fparam.type.ty != Tident) |
| 843 continue; | |
|
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|
844 auto tid = cast(TypeIdentifier)fparam.type; |
| 0 | 845 if (!tp.ident.equals(tid.ident) || tid.idents.dim) |
| 846 continue; | |
| 847 | |
| 848 if (fvarargs) // variadic function doesn't | |
| 849 goto Lnomatch; // go with variadic template | |
| 850 | |
| 851 /* The types of the function arguments | |
| 852 * now form the tuple argument. | |
| 853 */ | |
|
94
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Objects -> Vector!Object iteration 1
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parents:
90
diff
changeset
|
854 auto t = new Tuple(); |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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90
diff
changeset
|
855 dedargs[parameters.dim - 1] = t; |
| 0 | 856 |
| 857 tuple_dim = nfargs - (nfparams - 1); | |
| 858 t.objects.setDim(tuple_dim); | |
| 859 for (size_t i = 0; i < tuple_dim; i++) | |
| 860 { | |
|
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39648eb578f6
more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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87
diff
changeset
|
861 auto farg = fargs[fptupindex + i]; |
|
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Objects -> Vector!Object iteration 1
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parents:
90
diff
changeset
|
862 t.objects[i] = farg.type; |
| 0 | 863 } |
| 864 declareParameter(paramscope, tp, t); | |
| 865 goto L2; | |
| 866 } | |
| 867 fptupindex = -1; | |
| 868 } | |
| 869 } | |
| 870 | |
| 871 L1: | |
| 872 if (nfparams == nfargs) { | |
| 873 ; | |
| 874 } else if (nfargs > nfparams) { | |
| 875 if (fvarargs == 0) | |
| 876 goto Lnomatch; // too many args, no match | |
| 877 match = MATCHconvert; // match ... with a conversion | |
| 878 } | |
| 879 | |
| 880 L2: | |
| 881 version (DMDV2) { | |
| 882 // Match 'ethis' to any TemplateThisParameter's | |
| 883 if (ethis) | |
| 884 { | |
| 885 for (size_t i = 0; i < parameters.dim; i++) | |
| 886 { | |
|
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diff
changeset
|
887 auto tp2 = parameters[i]; |
| 0 | 888 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); |
| 889 if (ttp) | |
| 890 { | |
| 891 MATCH m; | |
| 892 | |
| 893 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 894 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 895 if (!m) | |
| 896 goto Lnomatch; | |
| 897 if (m < match) | |
| 898 match = m; // pick worst match | |
| 899 } | |
| 900 } | |
| 901 } | |
| 902 } | |
| 903 | |
| 904 // Loop through the function parameters | |
| 905 for (size_t i = 0; i < nfparams; i++) | |
| 906 { | |
| 907 /* Skip over function parameters which wound up | |
| 908 * as part of a template tuple parameter. | |
| 909 */ | |
| 910 if (i == fptupindex) | |
| 911 { | |
| 912 if (fptupindex == nfparams - 1) | |
| 913 break; | |
| 914 i += tuple_dim - 1; | |
| 915 continue; | |
| 916 } | |
| 917 | |
| 918 Argument fparam = Argument.getNth(fparameters, i); | |
| 919 | |
| 920 if (i >= nfargs) // if not enough arguments | |
| 921 { | |
| 922 if (fparam.defaultArg) | |
| 923 { | |
| 924 /* Default arguments do not participate in template argument | |
| 925 * deduction. | |
| 926 */ | |
| 927 goto Lmatch; | |
| 928 } | |
| 929 } | |
| 930 else | |
| 931 { | |
|
90
39648eb578f6
more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
932 auto farg = fargs[i]; |
| 0 | 933 static if (false) { |
| 934 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 935 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 936 } | |
| 937 Type argtype = farg.type; | |
| 938 | |
| 939 version (DMDV2) { | |
| 940 /* Allow string literals which are type [] to match with [dim] | |
| 941 */ | |
| 942 if (farg.op == TOKstring) | |
| 943 { | |
| 944 StringExp se = cast(StringExp)farg; | |
| 945 if (!se.committed && argtype.ty == Tarray && | |
| 946 fparam.type.toBasetype().ty == Tsarray) | |
| 947 { | |
| 948 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 949 argtype = argtype.semantic(se.loc, null); | |
| 950 argtype = argtype.invariantOf(); | |
| 951 } | |
| 952 } | |
| 953 } | |
| 954 | |
| 955 MATCH m; | |
| 956 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 957 //printf("\tdeduceType m = %d\n", m); | |
| 958 | |
| 959 /* If no match, see if there's a conversion to a delegate | |
| 960 */ | |
| 961 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 962 { | |
| 963 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 964 TypeFunction tf = cast(TypeFunction)td.next; | |
| 965 | |
| 966 if (!tf.varargs && Argument.dim(tf.parameters) == 0) | |
| 967 { | |
| 968 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 969 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 970 m = MATCHconvert; | |
| 971 } | |
| 972 //printf("\tm2 = %d\n", m); | |
| 973 } | |
| 974 | |
| 975 if (m) | |
| 976 { | |
| 977 if (m < match) | |
| 978 match = m; // pick worst match | |
| 979 continue; | |
| 980 } | |
| 981 } | |
| 982 | |
| 983 /* The following code for variadic arguments closely | |
| 984 * matches TypeFunction.callMatch() | |
| 985 */ | |
| 986 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 987 goto Lnomatch; | |
| 988 | |
| 989 /* Check for match with function parameter T... | |
| 990 */ | |
| 991 Type tb = fparam.type.toBasetype(); | |
| 992 switch (tb.ty) | |
| 993 { | |
| 994 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 995 case Tsarray: | |
| 996 { | |
| 997 TypeSArray tsa = cast(TypeSArray)tb; | |
| 998 ulong sz = tsa.dim.toInteger(); | |
| 999 if (sz != nfargs - i) | |
| 1000 goto Lnomatch; | |
| 1001 } | |
| 1002 case Tarray: | |
| 1003 { | |
| 1004 TypeArray ta = cast(TypeArray)tb; | |
| 1005 for (; i < nfargs; i++) | |
| 1006 { | |
|
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1007 auto arg = fargs[i]; |
| 0 | 1008 assert(arg); |
| 1009 MATCH m; | |
| 1010 /* If lazy array of delegates, | |
| 1011 * convert arg(s) to delegate(s) | |
| 1012 */ | |
| 1013 Type tret = fparam.isLazyArray(); | |
| 1014 if (tret) | |
| 1015 { | |
| 1016 if (ta.next.equals(arg.type)) | |
| 1017 { | |
| 1018 m = MATCHexact; | |
| 1019 } | |
| 1020 else | |
| 1021 { | |
| 1022 m = arg.implicitConvTo(tret); | |
| 1023 if (m == MATCHnomatch) | |
| 1024 { | |
| 1025 if (tret.toBasetype().ty == Tvoid) | |
| 1026 m = MATCHconvert; | |
| 1027 } | |
| 1028 } | |
| 1029 } | |
| 1030 else | |
| 1031 { | |
| 1032 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 1033 //m = arg.implicitConvTo(ta.next); | |
| 1034 } | |
| 1035 if (m == MATCHnomatch) | |
| 1036 goto Lnomatch; | |
| 1037 if (m < match) | |
| 1038 match = m; | |
| 1039 } | |
| 1040 goto Lmatch; | |
| 1041 } | |
| 1042 case Tclass: | |
| 1043 case Tident: | |
| 1044 goto Lmatch; | |
| 1045 | |
| 1046 default: | |
| 1047 goto Lnomatch; | |
| 1048 } | |
| 1049 } | |
| 1050 | |
| 1051 Lmatch: | |
| 1052 | |
| 1053 /* Fill in any missing arguments with their defaults. | |
| 1054 */ | |
| 1055 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 1056 { | |
|
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1057 auto tp2 = parameters[i]; |
| 0 | 1058 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); |
| 1059 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 1060 * But for function templates, we really need them to match | |
| 1061 */ | |
|
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1062 Object oarg = dedargs[i]; |
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1063 Object oded = dedtypes[i]; |
| 0 | 1064 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); |
| 1065 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 1066 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 1067 if (!oarg) | |
| 1068 { | |
| 1069 if (oded) | |
| 1070 { | |
| 1071 if (tp2.specialization()) | |
| 1072 { | |
| 1073 /* The specialization can work as long as afterwards | |
| 1074 * the oded == oarg | |
| 1075 */ | |
| 1076 Declaration sparam; | |
|
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|
1077 dedargs[i] = oded; |
| 0 | 1078 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); |
| 1079 //printf("m2 = %d\n", m2); | |
| 1080 if (!m2) | |
| 1081 goto Lnomatch; | |
| 1082 if (m2 < match) | |
| 1083 match = m2; // pick worst match | |
|
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|
1084 if (dedtypes[i] !is oded) |
| 0 | 1085 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); |
| 1086 } | |
| 1087 } | |
| 1088 else | |
| 1089 { | |
| 1090 oded = tp2.defaultArg(loc, paramscope); | |
| 1091 if (!oded) | |
| 1092 goto Lnomatch; | |
| 1093 } | |
| 1094 declareParameter(paramscope, tp2, oded); | |
|
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|
1095 dedargs[i] = oded; |
| 0 | 1096 } |
| 1097 } | |
| 1098 | |
| 1099 version (DMDV2) { | |
| 1100 if (constraint) | |
| 1101 { /* Check to see if constraint is satisfied. | |
| 1102 */ | |
| 1103 Expression e = constraint.syntaxCopy(); | |
| 1104 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1105 e = e.semantic(paramscope); | |
| 1106 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1107 if (e.isBool(true)) { | |
| 1108 ; | |
| 1109 } else if (e.isBool(false)) | |
| 1110 goto Lnomatch; | |
| 1111 else | |
| 1112 { | |
| 1113 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1114 } | |
| 1115 } | |
| 1116 } | |
| 1117 | |
| 1118 static if (false) { | |
| 1119 for (i = 0; i < dedargs.dim; i++) | |
| 1120 { | |
| 1121 Type t = cast(Type)dedargs.data[i]; | |
| 1122 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1123 } | |
| 1124 } | |
| 1125 | |
| 1126 paramscope.pop(); | |
| 1127 //printf("\tmatch %d\n", match); | |
| 1128 return match; | |
| 1129 | |
| 1130 Lnomatch: | |
| 1131 paramscope.pop(); | |
| 1132 //printf("\tnomatch\n"); | |
| 1133 return MATCHnomatch; | |
| 1134 } | |
| 104 | 1135 |
| 0 | 1136 /************************************************* |
| 1137 * Given function arguments, figure out which template function | |
| 1138 * to expand, and return that function. | |
| 1139 * If no match, give error message and return null. | |
| 1140 * Input: | |
| 1141 * sc instantiation scope | |
| 1142 * loc instantiation location | |
| 1143 * targsi initial list of template arguments | |
| 1144 * ethis if !null, the 'this' pointer argument | |
| 1145 * fargs arguments to function | |
| 1146 * flags 1: do not issue error message on no match, just return null | |
| 1147 */ | |
| 1148 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1149 { | |
| 1150 MATCH m_best = MATCHnomatch; | |
| 1151 TemplateDeclaration td_ambig = null; | |
| 1152 TemplateDeclaration td_best = null; | |
| 1153 Objects tdargs = new Objects(); | |
| 1154 TemplateInstance ti; | |
| 1155 FuncDeclaration fd; | |
| 1156 | |
| 1157 static if (false) { | |
| 1158 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 104 | 1159 printf(" targsi:\n"); |
| 0 | 1160 if (targsi) |
| 1161 { | |
| 1162 for (int i = 0; i < targsi.dim; i++) | |
| 1163 { | |
| 1164 Object arg = cast(Object)targsi.data[i]; | |
| 1165 printf("\t%s\n", arg.toChars()); | |
| 1166 } | |
| 1167 } | |
| 104 | 1168 printf(" fargs:\n"); |
| 0 | 1169 for (int i = 0; i < fargs.dim; i++) |
| 1170 { | |
| 1171 Expression arg = cast(Expression)fargs.data[i]; | |
| 1172 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1173 //printf("\tty = %d\n", arg.type.ty); | |
| 1174 } | |
| 1175 } | |
| 1176 | |
| 1177 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1178 { | |
| 1179 if (!td.semanticRun) | |
| 1180 { | |
| 1181 error("forward reference to template %s", td.toChars()); | |
| 1182 goto Lerror; | |
| 1183 } | |
| 1184 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1185 { | |
| 1186 error("is not a function template"); | |
| 1187 goto Lerror; | |
| 1188 } | |
| 1189 | |
| 1190 MATCH m; | |
| 1191 scope Objects dedargs = new Objects(); | |
| 1192 | |
| 1193 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1194 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1195 if (!m) // if no match | |
| 1196 continue; | |
| 1197 | |
| 1198 if (m < m_best) | |
| 1199 goto Ltd_best; | |
| 1200 if (m > m_best) | |
| 1201 goto Ltd; | |
| 1202 | |
| 1203 { | |
| 1204 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1205 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1206 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1207 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1208 | |
| 1209 if (c1 > c2) | |
| 1210 goto Ltd; | |
| 1211 else if (c1 < c2) | |
| 1212 goto Ltd_best; | |
| 1213 else | |
| 1214 goto Lambig; | |
| 1215 } | |
| 1216 | |
| 1217 Lambig: // td_best and td are ambiguous | |
| 1218 td_ambig = td; | |
| 1219 continue; | |
| 1220 | |
| 1221 Ltd_best: // td_best is the best match so far | |
| 1222 td_ambig = null; | |
| 1223 continue; | |
| 1224 | |
| 1225 Ltd: // td is the new best match | |
| 1226 td_ambig = null; | |
| 1227 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1228 td_best = td; | |
| 1229 m_best = m; | |
| 1230 tdargs.setDim(dedargs.dim); | |
|
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|
1231 memcpy(tdargs.ptr, dedargs.ptr, tdargs.dim * (void*).sizeof); |
| 0 | 1232 continue; |
| 1233 } | |
| 1234 if (!td_best) | |
| 1235 { | |
| 1236 if (!(flags & 1)) | |
| 1237 error(loc, "does not match any function template declaration"); | |
| 1238 goto Lerror; | |
| 1239 } | |
| 1240 if (td_ambig) | |
| 1241 { | |
| 1242 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1243 td_best.toChars(), td_ambig.toChars()); | |
| 1244 } | |
| 1245 | |
| 1246 /* The best match is td_best with arguments tdargs. | |
| 1247 * Now instantiate the template. | |
| 1248 */ | |
| 1249 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1250 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1251 ti.semantic(sc); | |
| 1252 fd = ti.toAlias().isFuncDeclaration(); | |
| 1253 if (!fd) | |
| 1254 goto Lerror; | |
| 1255 return fd; | |
| 1256 | |
| 1257 Lerror: | |
| 1258 /// version (DMDV2) { | |
| 1259 if (!(flags & 1)) | |
| 1260 /// } | |
| 1261 { | |
| 1262 HdrGenState hgs; | |
| 1263 | |
| 1264 scope OutBuffer bufa = new OutBuffer(); | |
| 1265 Objects args = targsi; | |
| 1266 if (args) | |
| 1267 { | |
| 1268 for (int i = 0; i < args.dim; i++) | |
| 1269 { | |
| 1270 if (i) | |
| 1271 bufa.writeByte(','); | |
|
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|
1272 Object oarg = args[i]; |
| 0 | 1273 ObjectToCBuffer(bufa, &hgs, oarg); |
| 1274 } | |
| 1275 } | |
| 1276 | |
| 1277 scope OutBuffer buf = new OutBuffer(); | |
| 1278 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1279 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1280 } | |
| 1281 return null; | |
| 1282 } | |
| 1283 | |
| 1284 /************************************************** | |
| 1285 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1286 */ | |
| 104 | 1287 void declareParameter(Scope sc, TemplateParameter tp, Object o) |
| 0 | 1288 { |
| 1289 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1290 | |
| 1291 Type targ = isType(o); | |
| 1292 Expression ea = isExpression(o); | |
| 1293 Dsymbol sa = isDsymbol(o); | |
| 1294 Tuple va = isTuple(o); | |
| 1295 | |
| 1296 Dsymbol s; | |
| 1297 | |
| 1298 // See if tp.ident already exists with a matching definition | |
| 1299 Dsymbol scopesym; | |
| 1300 s = sc.search(loc, tp.ident, &scopesym); | |
| 1301 if (s && scopesym == sc.scopesym) | |
| 1302 { | |
| 1303 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1304 if (va && td) | |
| 1305 { | |
| 1306 Tuple tup = new Tuple(); | |
| 1307 assert(false); // < not implemented | |
| 1308 ///tup.objects = *td.objects; | |
| 1309 if (match(va, tup, this, sc)) | |
| 1310 { | |
| 1311 return; | |
| 1312 } | |
| 1313 } | |
| 1314 } | |
| 1315 | |
| 1316 if (targ) | |
| 1317 { | |
| 1318 //printf("type %s\n", targ.toChars()); | |
| 1319 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1320 } | |
| 1321 else if (sa) | |
| 1322 { | |
| 1323 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1324 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1325 } | |
| 1326 else if (ea) | |
| 1327 { | |
| 1328 // tdtypes.data[i] always matches ea here | |
| 1329 Initializer init = new ExpInitializer(loc, ea); | |
| 1330 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1331 | |
| 1332 Type t = tvp ? tvp.valType : null; | |
| 1333 | |
| 1334 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1335 v.storage_class = STCmanifest; | |
| 1336 s = v; | |
| 1337 } | |
| 1338 else if (va) | |
| 1339 { | |
| 1340 //printf("\ttuple\n"); | |
| 1341 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1342 } | |
| 1343 else | |
| 1344 { | |
| 1345 debug writefln(o.toString()); | |
| 1346 assert(0); | |
| 1347 } | |
| 1348 | |
| 1349 if (!sc.insert(s)) | |
| 1350 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1351 | |
| 1352 s.semantic(sc); | |
| 1353 } | |
| 1354 | |
| 104 | 1355 override TemplateDeclaration isTemplateDeclaration() { return this; } |
| 0 | 1356 |
| 104 | 1357 TemplateTupleParameter isVariadic() |
| 0 | 1358 { |
| 1359 return .isVariadic(parameters); | |
| 1360 } | |
| 1361 | |
| 63 | 1362 /*********************************** |
| 1363 * We can overload templates. | |
| 1364 */ | |
| 104 | 1365 override bool isOverloadable() |
| 0 | 1366 { |
| 104 | 1367 return true; |
| 0 | 1368 } |
| 72 | 1369 } |