Mercurial > projects > ddmd
annotate dmd/TemplateInstance.d @ 135:af1bebfd96a4 dmd2037
dmd 2.038
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 13 Sep 2010 22:19:42 +0100 |
| parents | 206db751bd4c |
| children | e7769d53e750 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateInstance; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.ScopeDsymbol; |
| 5 import dmd.IntegerExp; | |
| 6 import dmd.Identifier; | |
| 7 import dmd.ArrayTypes; | |
| 8 import dmd.TupleDeclaration; | |
| 9 import dmd.TemplateParameter; | |
| 10 import dmd.AliasDeclaration; | |
| 11 import dmd.TemplateDeclaration; | |
| 12 import dmd.TupleExp; | |
| 13 import dmd.WithScopeSymbol; | |
| 14 import dmd.Dsymbol; | |
| 15 import dmd.Module; | |
| 16 import dmd.ArrayTypes; | |
| 17 import dmd.Loc; | |
| 18 import dmd.Global; | |
| 19 import dmd.Util; | |
| 20 import dmd.Type; | |
| 21 import dmd.Expression; | |
| 22 import dmd.Tuple; | |
| 23 import dmd.STC; | |
| 24 import dmd.TOK; | |
| 25 import dmd.TY; | |
| 26 import dmd.TypeTuple; | |
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27 import dmd.Parameter; |
| 0 | 28 import dmd.WANT; |
| 29 import dmd.ExpInitializer; | |
| 30 import dmd.Array; | |
| 31 import dmd.DsymbolTable; | |
| 32 import dmd.Scope; | |
| 33 import dmd.OutBuffer; | |
| 34 import dmd.HdrGenState; | |
| 35 import dmd.VarDeclaration; | |
| 36 import dmd.VarExp; | |
| 37 import dmd.FuncExp; | |
| 38 import dmd.Declaration; | |
| 39 import dmd.MATCH; | |
|
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40 import dmd.TypeFunction; |
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41 import dmd.TemplateTupleParameter; |
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42 import dmd.FuncDeclaration; |
| 135 | 43 import dmd.OverloadSet; |
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44 import dmd.templates.Util; |
| 0 | 45 |
| 46 import dmd.backend.glue; | |
| 47 | |
| 48 Tuple isTuple(Object o) | |
| 49 { | |
| 50 //return dynamic_cast<Tuple *>(o); | |
| 51 ///if (!o || o.dyncast() != DYNCAST_TUPLE) | |
| 52 /// return null; | |
| 53 return cast(Tuple)o; | |
| 54 } | |
| 55 | |
| 56 /****************************** | |
| 57 * If o1 matches o2, return 1. | |
| 58 * Else, return 0. | |
| 59 */ | |
| 60 | |
| 61 bool match(Object o1, Object o2, TemplateDeclaration tempdecl, Scope sc) | |
| 62 { | |
| 63 Type t1 = isType(o1); | |
| 64 Type t2 = isType(o2); | |
| 65 Expression e1 = isExpression(o1); | |
| 66 Expression e2 = isExpression(o2); | |
| 67 Dsymbol s1 = isDsymbol(o1); | |
| 68 Dsymbol s2 = isDsymbol(o2); | |
| 69 Tuple v1 = isTuple(o1); | |
| 70 Tuple v2 = isTuple(o2); | |
| 71 | |
| 72 //printf("\t match t1 %p t2 %p, e1 %p e2 %p, s1 %p s2 %p, v1 %p v2 %p\n", t1,t2,e1,e2,s1,s2,v1,v2); | |
| 73 | |
| 74 /* A proper implementation of the various equals() overrides | |
| 75 * should make it possible to just do o1.equals(o2), but | |
| 76 * we'll do that another day. | |
| 77 */ | |
| 78 | |
| 79 if (t1) | |
| 80 { | |
| 81 /* if t1 is an instance of ti, then give error | |
| 82 * about recursive expansions. | |
| 83 */ | |
| 84 Dsymbol s = t1.toDsymbol(sc); | |
| 85 if (s && s.parent) | |
| 86 { | |
| 87 TemplateInstance ti1 = s.parent.isTemplateInstance(); | |
| 88 if (ti1 && ti1.tempdecl == tempdecl) | |
| 89 { | |
| 90 for (Scope sc1 = sc; sc1; sc1 = sc1.enclosing) | |
| 91 { | |
| 92 if (sc1.scopesym == ti1) | |
| 93 { | |
| 94 error("recursive template expansion for template argument %s", t1.toChars()); | |
| 95 return true; // fake a match | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 //printf("t1 = %s\n", t1.toChars()); | |
| 102 //printf("t2 = %s\n", t2.toChars()); | |
| 103 if (!t2 || !t1.equals(t2)) | |
| 104 goto Lnomatch; | |
| 105 } | |
| 106 else if (e1) | |
| 107 { | |
| 108 static if (false) { | |
| 109 if (e1 && e2) | |
| 110 { | |
| 111 printf("match %d\n", e1.equals(e2)); | |
| 112 e1.print(); | |
| 113 e2.print(); | |
| 114 e1.type.print(); | |
| 115 e2.type.print(); | |
| 116 } | |
| 117 } | |
| 118 if (!e2) | |
| 119 goto Lnomatch; | |
| 120 if (!e1.equals(e2)) | |
| 121 goto Lnomatch; | |
| 122 } | |
| 123 else if (s1) | |
| 124 { | |
| 125 //printf("%p %s, %p %s\n", s1, s1.toChars(), s2, s2.toChars()); | |
| 126 if (!s2 || !s1.equals(s2) || s1.parent != s2.parent) | |
| 127 { | |
| 128 goto Lnomatch; | |
| 129 } | |
| 130 version (DMDV2) { | |
| 131 VarDeclaration vv1 = s1.isVarDeclaration(); | |
| 132 VarDeclaration vv2 = s2.isVarDeclaration(); | |
| 133 if (vv1 && vv2 && vv1.storage_class & vv2.storage_class & STCmanifest) | |
| 134 { | |
| 135 ExpInitializer ei1 = vv1.init.isExpInitializer(); | |
| 136 ExpInitializer ei2 = vv2.init.isExpInitializer(); | |
| 137 if (ei1 && ei2 && !ei1.exp.equals(ei2.exp)) | |
| 138 goto Lnomatch; | |
| 139 } | |
| 140 } | |
| 141 } | |
| 142 else if (v1) | |
| 143 { | |
| 144 if (!v2) | |
| 145 goto Lnomatch; | |
| 146 | |
| 147 if (v1.objects.dim != v2.objects.dim) | |
| 148 goto Lnomatch; | |
| 149 | |
| 150 for (size_t i = 0; i < v1.objects.dim; i++) | |
| 151 { | |
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152 if (!match(v1.objects[i], v2.objects[i], tempdecl, sc)) |
| 0 | 153 goto Lnomatch; |
| 154 } | |
| 155 } | |
| 156 //printf("match\n"); | |
| 157 return true; // match | |
| 158 | |
| 159 Lnomatch: | |
| 160 //printf("nomatch\n"); | |
| 161 return false; // nomatch; | |
| 162 } | |
| 163 | |
| 164 class TemplateInstance : ScopeDsymbol | |
| 165 { | |
| 166 /* Given: | |
| 167 * foo!(args) => | |
| 168 * name = foo | |
| 169 * tiargs = args | |
| 170 */ | |
| 171 Identifier name; | |
| 172 //Array idents; | |
| 173 Objects tiargs; // Array of Types/Expressions of template | |
| 174 // instance arguments [int*, char, 10*10] | |
| 175 | |
| 176 Objects tdtypes; // Array of Types/Expressions corresponding | |
| 177 // to TemplateDeclaration.parameters | |
| 178 // [int, char, 100] | |
| 179 | |
| 180 TemplateDeclaration tempdecl; // referenced by foo.bar.abc | |
| 181 TemplateInstance inst; // refer to existing instance | |
| 182 TemplateInstance tinst; // enclosing template instance | |
| 183 ScopeDsymbol argsym; // argument symbol table | |
| 184 AliasDeclaration aliasdecl; // !=null if instance is an alias for its | |
| 185 // sole member | |
| 186 WithScopeSymbol withsym; // if a member of a with statement | |
| 187 int semanticRun; // has semantic() been done? | |
| 188 int semantictiargsdone; // has semanticTiargs() been done? | |
| 189 int nest; // for recursion detection | |
| 190 int havetempdecl; // 1 if used second constructor | |
| 191 Dsymbol isnested; // if referencing local symbols, this is the context | |
| 192 int errors; // 1 if compiled with errors | |
| 193 version (IN_GCC) { | |
| 194 /* On some targets, it is necessary to know whether a symbol | |
| 195 will be emitted in the output or not before the symbol | |
| 196 is used. This can be different from getModule(). */ | |
| 197 Module objFileModule; | |
| 198 } | |
| 199 | |
| 200 this(Loc loc, Identifier ident) | |
| 201 { | |
| 202 super(null); | |
| 203 | |
| 204 version (LOG) { | |
| 205 printf("TemplateInstance(this = %p, ident = '%s')\n", this, ident ? ident.toChars() : "null"); | |
| 206 } | |
| 207 this.loc = loc; | |
| 208 this.name = ident; | |
| 209 | |
| 210 tdtypes = new Objects(); | |
| 211 } | |
| 212 | |
| 213 /***************** | |
| 214 * This constructor is only called when we figured out which function | |
| 215 * template to instantiate. | |
| 216 */ | |
| 217 this(Loc loc, TemplateDeclaration td, Objects tiargs) | |
| 218 { | |
| 219 super(null); | |
| 220 | |
| 221 version (LOG) { | |
| 222 printf("TemplateInstance(this = %p, tempdecl = '%s')\n", this, td.toChars()); | |
| 223 } | |
| 224 this.loc = loc; | |
| 225 this.name = td.ident; | |
| 226 this.tiargs = tiargs; | |
| 227 this.tempdecl = td; | |
| 228 this.semantictiargsdone = 1; | |
| 229 this.havetempdecl = 1; | |
| 230 | |
| 231 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 232 | |
| 233 tdtypes = new Objects(); | |
| 234 } | |
| 235 | |
| 236 static Objects arraySyntaxCopy(Objects objs) | |
| 237 { | |
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238 Objects a = null; |
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239 if (objs) |
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240 { a = new Objects(); |
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241 a.setDim(objs.dim); |
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242 for (size_t i = 0; i < objs.dim; i++) |
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243 { |
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244 a[i] = objectSyntaxCopy(objs[i]); |
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245 } |
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246 } |
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247 return a; |
| 0 | 248 } |
| 249 | |
| 72 | 250 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 251 { |
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252 TemplateInstance ti; |
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253 |
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254 if (s) |
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255 ti = cast(TemplateInstance)s; |
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256 else |
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257 ti = new TemplateInstance(loc, name); |
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258 |
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259 ti.tiargs = arraySyntaxCopy(tiargs); |
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260 |
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261 ScopeDsymbol.syntaxCopy(ti); |
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262 return ti; |
| 0 | 263 } |
| 264 | |
| 72 | 265 override void semantic(Scope sc) |
| 0 | 266 { |
| 135 | 267 semantic(sc, null); |
| 268 } | |
| 269 | |
| 270 void semantic(Scope sc, Expressions fargs) | |
| 271 { | |
| 0 | 272 if (global.errors) |
| 273 { | |
| 274 if (!global.gag) | |
| 275 { | |
| 276 /* Trying to soldier on rarely generates useful messages | |
| 277 * at this point. | |
| 278 */ | |
| 279 fatal(); | |
| 280 } | |
| 281 return; | |
| 282 } | |
| 283 | |
| 284 version (LOG) { | |
| 285 printf("\n+TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 286 } | |
| 287 | |
| 288 if (inst) // if semantic() was already run | |
| 289 { | |
| 290 version (LOG) { | |
| 291 printf("-TemplateInstance.semantic('%s', this=%p) already run\n", inst.toChars(), inst); | |
| 292 } | |
| 293 return; | |
| 294 } | |
| 295 | |
| 296 // get the enclosing template instance from the scope tinst | |
| 297 tinst = sc.tinst; | |
| 298 | |
| 299 if (semanticRun != 0) | |
| 300 { | |
| 301 error(loc, "recursive template expansion"); | |
| 302 // inst = this; | |
| 303 return; | |
| 304 } | |
| 305 | |
| 306 semanticRun = 1; | |
| 307 | |
| 308 version (LOG) { | |
| 309 printf("\tdo semantic\n"); | |
| 310 } | |
| 311 if (havetempdecl) | |
| 312 { | |
| 313 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 314 | |
| 315 // Deduce tdtypes | |
| 316 tdtypes.setDim(tempdecl.parameters.dim); | |
| 317 if (!tempdecl.matchWithInstance(this, tdtypes, 2)) | |
| 318 { | |
| 319 error("incompatible arguments for template instantiation"); | |
| 320 inst = this; | |
| 321 return; | |
| 322 } | |
| 323 } | |
| 324 else | |
| 325 { | |
| 326 /* Run semantic on each argument, place results in tiargs[] | |
| 327 * (if we havetempdecl, then tiargs is already evaluated) | |
| 328 */ | |
| 329 semanticTiargs(sc); | |
| 330 | |
| 331 tempdecl = findTemplateDeclaration(sc); | |
| 332 if (tempdecl) | |
| 333 tempdecl = findBestMatch(sc); | |
| 334 | |
| 335 if (!tempdecl || global.errors) | |
| 336 { | |
| 337 inst = this; | |
| 338 //printf("error return %p, %d\n", tempdecl, global.errors); | |
| 339 return; // error recovery | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 hasNestedArgs(tiargs); | |
| 344 | |
| 345 /* See if there is an existing TemplateInstantiation that already | |
| 346 * implements the typeargs. If so, just refer to that one instead. | |
| 347 */ | |
| 348 | |
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349 foreach (ti; tempdecl.instances) |
| 0 | 350 { |
| 351 version (LOG) { | |
| 352 printf("\t%s: checking for match with instance %d (%p): '%s'\n", toChars(), i, ti, ti.toChars()); | |
| 353 } | |
| 354 assert(tdtypes.dim == ti.tdtypes.dim); | |
| 355 | |
| 356 // Nesting must match | |
| 357 if (isnested !is ti.isnested) | |
| 358 { | |
| 359 //printf("test2 isnested %s ti.isnested %s\n", isnested ? isnested.toChars() : "", ti.isnested ? ti.isnested.toChars() : ""); | |
| 360 continue; | |
| 361 } | |
| 362 static if (false) { | |
| 363 if (isnested && sc.parent != ti.parent) | |
| 364 continue; | |
| 365 } | |
| 366 for (size_t j = 0; j < tdtypes.dim; j++) | |
| 367 { | |
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368 Object o1 = tdtypes[j]; |
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369 Object o2 = ti.tdtypes[j]; |
| 0 | 370 if (!match(o1, o2, tempdecl, sc)) |
| 371 { | |
| 372 goto L1; | |
| 135 | 373 } |
| 374 } | |
| 375 | |
| 376 /* Template functions may have different instantiations based on | |
| 377 * "auto ref" parameters. | |
| 378 */ | |
| 379 if (fargs) | |
| 380 { | |
| 381 FuncDeclaration fd = ti.toAlias().isFuncDeclaration(); | |
| 382 if (fd) | |
| 383 { | |
| 384 auto fparameters = fd.getParameters(null); | |
| 385 size_t nfparams = Parameter.dim(fparameters); // Num function parameters | |
| 386 for (int i = 0; i < nfparams && i < fargs.dim; i++) | |
| 387 { auto fparam = Parameter.getNth(fparameters, i); | |
| 388 auto farg = fargs[i]; | |
| 389 if (fparam.storageClass & STCauto) // if "auto ref" | |
| 390 { | |
| 391 if (farg.isLvalue()) | |
| 392 { if (!(fparam.storageClass & STC.STCref)) | |
| 393 goto L1; // auto ref's don't match | |
| 394 } | |
| 395 else | |
| 396 { if (fparam.storageClass & STC.STCref) | |
| 397 goto L1; // auto ref's don't match | |
| 398 } | |
| 399 } | |
| 400 } | |
| 0 | 401 } |
| 402 } | |
| 403 | |
| 404 // It's a match | |
| 405 inst = ti; | |
| 406 parent = ti.parent; | |
| 407 version (LOG) { | |
| 408 printf("\tit's a match with instance %p\n", inst); | |
| 409 } | |
| 410 return; | |
| 411 | |
| 412 L1: | |
| 413 ; | |
| 414 } | |
| 415 | |
| 416 /* So, we need to implement 'this' instance. | |
| 417 */ | |
| 418 version (LOG) { | |
| 419 printf("\timplement template instance '%s'\n", toChars()); | |
| 420 } | |
| 421 uint errorsave = global.errors; | |
| 422 inst = this; | |
| 423 int tempdecl_instance_idx = tempdecl.instances.dim; | |
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424 tempdecl.instances.push(this); |
| 0 | 425 parent = tempdecl.parent; |
| 426 //printf("parent = '%s'\n", parent.kind()); | |
| 427 | |
| 428 ident = genIdent(); // need an identifier for name mangling purposes. | |
| 429 | |
| 430 static if (true) { | |
| 431 if (isnested) | |
| 432 parent = isnested; | |
| 433 } | |
| 434 //printf("parent = '%s'\n", parent.kind()); | |
| 435 | |
| 436 // Add 'this' to the enclosing scope's members[] so the semantic routines | |
| 437 // will get called on the instance members | |
| 438 static if (true) { | |
| 439 int dosemantic3 = 0; | |
| 440 { | |
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441 Dsymbols a; |
| 0 | 442 |
| 443 Scope scx = sc; | |
| 444 static if (false) { | |
| 445 for (scx = sc; scx; scx = scx.enclosing) | |
| 446 if (scx.scopesym) | |
| 447 break; | |
| 448 } | |
| 449 | |
| 450 //if (scx && scx.scopesym) printf("3: scx is %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 451 if (scx && scx.scopesym && | |
| 452 scx.scopesym.members && !scx.scopesym.isTemplateMixin() | |
| 453 | |
| 454 /// static if (false) { // removed because it bloated compile times | |
| 455 /// /* The problem is if A imports B, and B imports A, and both A | |
| 456 /// * and B instantiate the same template, does the compilation of A | |
| 457 /// * or the compilation of B do the actual instantiation? | |
| 458 /// * | |
| 459 /// * see bugzilla 2500. | |
| 460 /// */ | |
| 461 /// && !scx.module.selfImports() | |
| 462 /// } | |
| 463 ) | |
| 464 { | |
| 465 //printf("\t1: adding to %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 466 a = scx.scopesym.members; | |
| 467 } | |
| 468 else | |
| 469 { Module m = sc.module_.importedFrom; | |
| 470 //printf("\t2: adding to module %s instead of module %s\n", m.toChars(), sc.module.toChars()); | |
| 471 a = m.members; | |
| 472 if (m.semanticRun >= 3) | |
| 473 dosemantic3 = 1; | |
| 474 } | |
| 475 | |
| 476 for (int i = 0; 1; i++) | |
| 477 { | |
| 478 if (i == a.dim) | |
| 479 { | |
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480 a.push(this); |
| 0 | 481 break; |
| 482 } | |
| 483 | |
|
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484 if (this is a[i]) // if already in Array |
| 0 | 485 break; |
| 486 } | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 // Copy the syntax trees from the TemplateDeclaration | |
| 491 members = Dsymbol.arraySyntaxCopy(tempdecl.members); | |
| 492 | |
| 493 // Create our own scope for the template parameters | |
| 494 Scope scope_ = tempdecl.scope_; | |
| 495 if (!tempdecl.semanticRun) | |
| 496 { | |
| 497 error("template instantiation %s forward references template declaration %s\n", toChars(), tempdecl.toChars()); | |
| 498 return; | |
| 499 } | |
| 500 | |
| 501 version (LOG) { | |
| 502 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
| 503 } | |
| 504 argsym = new ScopeDsymbol(); | |
| 505 argsym.parent = scope_.parent; | |
| 506 scope_ = scope_.push(argsym); | |
| 507 // scope.stc = 0; | |
| 508 | |
| 509 // Declare each template parameter as an alias for the argument type | |
| 510 Scope paramscope = scope_.push(); | |
| 511 paramscope.stc = STCundefined; | |
| 512 declareParameters(paramscope); | |
| 513 paramscope.pop(); | |
| 514 | |
| 515 // Add members of template instance to template instance symbol table | |
| 516 // parent = scope.scopesym; | |
| 517 symtab = new DsymbolTable(); | |
| 13 | 518 bool memnum = false; |
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519 foreach(Dsymbol s; members) |
| 0 | 520 { |
| 521 version (LOG) { | |
| 522 printf("\t[%d] adding member '%s' %p kind %s to '%s', memnum = %d\n", i, s.toChars(), s, s.kind(), this.toChars(), memnum); | |
| 523 } | |
| 524 memnum |= s.addMember(scope_, this, memnum); | |
| 525 } | |
| 526 | |
| 527 version (LOG) { | |
| 528 printf("adding members done\n"); | |
| 529 } | |
| 530 | |
| 531 /* See if there is only one member of template instance, and that | |
| 532 * member has the same name as the template instance. | |
| 533 * If so, this template instance becomes an alias for that member. | |
| 534 */ | |
| 535 //printf("members.dim = %d\n", members.dim); | |
| 536 if (members.dim) | |
| 537 { | |
| 538 Dsymbol s; | |
| 539 if (Dsymbol.oneMembers(members, &s) && s) | |
| 540 { | |
| 541 //printf("s.kind = '%s'\n", s.kind()); | |
| 542 //s.print(); | |
| 543 //printf("'%s', '%s'\n", s.ident.toChars(), tempdecl.ident.toChars()); | |
| 544 if (s.ident && s.ident.equals(tempdecl.ident)) | |
| 545 { | |
| 546 //printf("setting aliasdecl\n"); | |
| 547 aliasdecl = new AliasDeclaration(loc, s.ident, s); | |
| 548 } | |
| 549 } | |
| 550 } | |
| 135 | 551 |
| 552 /* If function template declaration | |
| 553 */ | |
| 554 if (fargs && aliasdecl) | |
| 555 { | |
| 556 FuncDeclaration fd = aliasdecl.toAlias().isFuncDeclaration(); | |
| 557 if (fd) | |
| 558 { | |
| 559 /* Transmit fargs to type so that TypeFunction::semantic() can | |
| 560 * resolve any "auto ref" storage classes. | |
| 561 */ | |
| 562 auto tf = cast(TypeFunction)fd.type; | |
| 563 if (tf && tf.ty == TY.Tfunction) | |
| 564 tf.fargs = fargs; | |
| 565 } | |
| 566 } | |
| 0 | 567 |
| 568 // Do semantic() analysis on template instance members | |
| 569 version (LOG) { | |
| 570 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
| 571 } | |
| 572 Scope sc2; | |
| 573 sc2 = scope_.push(this); | |
| 574 //printf("isnested = %d, sc.parent = %s\n", isnested, sc.parent.toChars()); | |
| 575 sc2.parent = /*isnested ? sc.parent :*/ this; | |
| 576 sc2.tinst = this; | |
| 577 | |
| 578 try | |
| 579 { | |
| 79 | 580 // static int nest; |
| 0 | 581 //printf("%d\n", nest); |
| 582 if (++nest > 500) | |
| 583 { | |
| 584 global.gag = 0; // ensure error message gets printed | |
| 585 error("recursive expansion"); | |
| 586 fatal(); | |
| 587 } | |
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588 foreach(Dsymbol s; members) |
| 0 | 589 { |
| 590 //printf("\t[%d] semantic on '%s' %p kind %s in '%s'\n", i, s.toChars(), s, s.kind(), this.toChars()); | |
| 591 //printf("test: isnested = %d, sc2.parent = %s\n", isnested, sc2.parent.toChars()); | |
| 592 // if (isnested) | |
| 593 // s.parent = sc.parent; | |
| 594 //printf("test3: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 595 s.semantic(sc2); | |
| 596 //printf("test4: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 597 sc2.module_.runDeferredSemantic(); | |
| 598 } | |
| 599 --nest; | |
| 600 } | |
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601 catch (Exception e) |
| 0 | 602 { |
| 603 global.gag = 0; // ensure error message gets printed | |
| 604 error("recursive expansion"); | |
| 605 fatal(); | |
| 606 } | |
| 607 | |
| 608 /* If any of the instantiation members didn't get semantic() run | |
| 609 * on them due to forward references, we cannot run semantic2() | |
| 610 * or semantic3() yet. | |
| 611 */ | |
| 612 for (size_t i = 0; i < Module.deferred.dim; i++) | |
| 613 { | |
| 614 Dsymbol sd = cast(Dsymbol)Module.deferred.data[i]; | |
| 615 | |
| 616 if (sd.parent is this) | |
| 617 goto Laftersemantic; | |
| 618 } | |
| 619 | |
| 620 /* The problem is when to parse the initializer for a variable. | |
| 621 * Perhaps VarDeclaration.semantic() should do it like it does | |
| 622 * for initializers inside a function. | |
| 623 */ | |
| 624 // if (sc.parent.isFuncDeclaration()) | |
| 625 | |
| 626 /* BUG 782: this has problems if the classes this depends on | |
| 627 * are forward referenced. Find a way to defer semantic() | |
| 628 * on this template. | |
| 629 */ | |
| 630 semantic2(sc2); | |
| 631 | |
| 632 if (sc.func || dosemantic3) | |
| 633 { | |
| 79 | 634 try |
| 635 { | |
| 636 // static int nest; // TODO: | |
| 637 if (++nest > 300) | |
| 638 { | |
| 639 global.gag = 0; // ensure error message gets printed | |
| 640 error("recursive expansion"); | |
| 641 fatal(); | |
| 642 } | |
| 643 semantic3(sc2); | |
| 644 --nest; | |
| 645 } | |
| 646 catch (Exception e) | |
| 647 { | |
| 648 global.gag = 0; // ensure error message gets printed | |
| 649 error("recursive expansion"); | |
| 650 fatal(); | |
| 651 } | |
| 0 | 652 } |
| 653 | |
| 654 Laftersemantic: | |
| 655 sc2.pop(); | |
| 656 | |
| 657 scope_.pop(); | |
| 658 | |
| 659 // Give additional context info if error occurred during instantiation | |
| 660 if (global.errors != errorsave) | |
| 661 { | |
| 662 error("error instantiating"); | |
| 135 | 663 if (tinst) |
| 0 | 664 { |
| 665 tinst.printInstantiationTrace(); | |
| 666 } | |
| 667 errors = 1; | |
| 668 if (global.gag) | |
| 669 tempdecl.instances.remove(tempdecl_instance_idx); | |
| 670 } | |
| 671 | |
| 672 version (LOG) { | |
| 673 printf("-TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 674 } | |
| 675 } | |
| 676 | |
| 72 | 677 override void semantic2(Scope sc) |
| 0 | 678 { |
| 679 if (semanticRun >= 2) | |
| 680 return; | |
| 681 | |
| 682 semanticRun = 2; | |
| 683 version (LOG) { | |
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684 printf("+TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 685 } |
| 686 | |
| 687 if (!errors && members) | |
| 688 { | |
| 689 sc = tempdecl.scope_; | |
| 690 assert(sc); | |
| 691 sc = sc.push(argsym); | |
| 692 sc = sc.push(this); | |
| 693 sc.tinst = this; | |
| 694 | |
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695 foreach(Dsymbol s; members) |
| 0 | 696 { |
| 697 version (LOG) { | |
| 698 printf("\tmember '%s', kind = '%s'\n", s.toChars(), s.kind()); | |
| 699 } | |
| 700 s.semantic2(sc); | |
| 701 } | |
| 702 | |
| 703 sc = sc.pop(); | |
| 704 sc.pop(); | |
| 705 } | |
| 706 | |
| 707 version (LOG) { | |
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708 printf("-TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 709 } |
| 710 } | |
| 711 | |
| 72 | 712 override void semantic3(Scope sc) |
| 0 | 713 { |
| 714 version (LOG) { | |
| 715 printf("TemplateInstance.semantic3('%s'), semanticRun = %d\n", toChars(), semanticRun); | |
| 716 } | |
| 717 //if (toChars()[0] == 'D') *(char*)0=0; | |
| 718 if (semanticRun >= 3) | |
| 719 return; | |
| 720 semanticRun = 3; | |
| 721 if (!errors && members) | |
| 722 { | |
| 723 sc = tempdecl.scope_; | |
| 724 sc = sc.push(argsym); | |
| 725 sc = sc.push(this); | |
| 726 sc.tinst = this; | |
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727 foreach(Dsymbol s; members) |
| 0 | 728 s.semantic3(sc); |
| 729 sc = sc.pop(); | |
| 730 sc.pop(); | |
| 731 } | |
| 732 } | |
| 733 | |
| 72 | 734 override void inlineScan() |
| 0 | 735 { |
| 736 version (LOG) { | |
| 737 printf("TemplateInstance.inlineScan('%s')\n", toChars()); | |
| 738 } | |
| 739 if (!errors && members) | |
| 740 { | |
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741 foreach(Dsymbol s; members) |
| 0 | 742 s.inlineScan(); |
| 743 } | |
| 744 } | |
| 745 | |
| 72 | 746 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 747 { |
| 748 int i; | |
| 749 | |
| 750 Identifier id = name; | |
| 751 buf.writestring(id.toChars()); | |
| 752 buf.writestring("!("); | |
| 753 if (nest) | |
| 754 buf.writestring("..."); | |
| 755 else | |
| 756 { | |
| 757 nest++; | |
| 758 Objects args = tiargs; | |
| 759 for (i = 0; i < args.dim; i++) | |
| 760 { | |
| 761 if (i) | |
| 762 buf.writeByte(','); | |
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763 Object oarg = args[i]; |
| 0 | 764 ObjectToCBuffer(buf, hgs, oarg); |
| 765 } | |
| 766 nest--; | |
| 767 } | |
| 768 buf.writeByte(')'); | |
| 769 } | |
| 770 | |
| 72 | 771 override Dsymbol toAlias() // resolve real symbol |
| 0 | 772 { |
| 79 | 773 version (LOG) |
| 774 { | |
| 775 writef("TemplateInstance.toAlias()\n"); | |
| 0 | 776 } |
| 777 if (!inst) | |
| 778 { | |
| 779 error("cannot resolve forward reference"); | |
| 79 | 780 errors = 1; |
| 0 | 781 return this; |
| 782 } | |
| 783 | |
| 784 if (inst !is this) | |
| 785 return inst.toAlias(); | |
| 786 | |
| 787 if (aliasdecl) | |
| 788 { | |
| 789 return aliasdecl.toAlias(); | |
| 790 } | |
| 791 | |
| 792 return inst; | |
| 793 } | |
| 794 | |
| 72 | 795 override string kind() |
| 0 | 796 { |
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797 return "template instance"; |
| 0 | 798 } |
| 799 | |
| 72 | 800 override bool oneMember(Dsymbol* ps) |
| 0 | 801 { |
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802 *ps = null; |
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803 return true; |
| 0 | 804 } |
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805 |
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806 /***************************************************** |
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807 * Determine if template instance is really a template function, |
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808 * and that template function needs to infer types from the function |
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809 * arguments. |
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810 */ |
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811 |
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812 bool needsTypeInference(Scope sc) |
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813 { |
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814 //printf("TemplateInstance::needsTypeInference() %s\n", toChars()); |
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815 if (!tempdecl) |
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816 tempdecl = findTemplateDeclaration(sc); |
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817 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) |
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818 { |
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819 /* If any of the overloaded template declarations need inference, |
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820 * then return TRUE |
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821 */ |
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822 FuncDeclaration fd; |
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823 if (!td.onemember || |
|
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824 (fd = td.onemember.toAlias().isFuncDeclaration()) is null || |
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825 fd.type.ty != TY.Tfunction) |
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826 { |
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827 /* Not a template function, therefore type inference is not possible. |
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828 */ |
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829 //printf("false\n"); |
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830 return false; |
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831 } |
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832 |
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833 /* Determine if the instance arguments, tiargs, are all that is necessary |
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834 * to instantiate the template. |
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835 */ |
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836 TemplateTupleParameter tp = td.isVariadic(); |
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837 //printf("tp = %p, td->parameters->dim = %d, tiargs->dim = %d\n", tp, td->parameters->dim, tiargs->dim); |
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838 TypeFunction fdtype = cast(TypeFunction)fd.type; |
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839 if (Parameter.dim(fdtype.parameters) && |
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840 (tp || tiargs.dim < td.parameters.dim)) |
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841 return true; |
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842 } |
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843 //printf("false\n"); |
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844 return false; |
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845 } |
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846 |
| 72 | 847 override string toChars() |
| 0 | 848 { |
| 849 scope OutBuffer buf = new OutBuffer(); | |
| 850 HdrGenState hgs; | |
| 851 | |
| 852 toCBuffer(buf, &hgs); | |
| 853 return buf.extractString(); | |
| 854 } | |
| 855 | |
| 72 | 856 override string mangle() |
| 0 | 857 { |
|
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858 OutBuffer buf = new OutBuffer(); |
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859 string id; |
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860 |
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861 static if (0) { |
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862 printf("TemplateInstance.mangle() %s", toChars()); |
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863 if (parent) |
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864 printf(" parent = %s %s", parent.kind(), parent.toChars()); |
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865 printf("\n"); |
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866 } |
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867 id = ident ? ident.toChars() : toChars(); |
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868 if (!tempdecl) |
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869 error("is not defined"); |
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870 else if (tempdecl.parent) |
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871 { |
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872 string p = tempdecl.parent.mangle(); |
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873 if (p[0] == '_' && p[1] == 'D') |
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874 p = p[2..$]; |
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875 buf.writestring(p); |
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876 } |
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877 buf.printf("%d%s", id.length, id); |
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878 id = buf.toChars(); |
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879 buf.data = null; |
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880 //printf("TemplateInstance.mangle() %s = %s\n", toChars(), id); |
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881 return id; |
| 0 | 882 } |
| 883 | |
| 135 | 884 /************************************** |
| 885 * Given an error instantiating the TemplateInstance, | |
| 886 * give the nested TemplateInstance instantiations that got | |
| 887 * us here. Those are a list threaded into the nested scopes. | |
| 888 */ | |
| 0 | 889 void printInstantiationTrace() |
| 890 { | |
|
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891 if (global.gag) |
| 135 | 892 return; |
| 893 /+ | |
| 894 const int max_shown = 6; | |
| 895 const string format = "%s: instantiated from here: %s\n"; | |
| 896 | |
| 897 // determine instantiation depth and number of recursive instantiations | |
| 898 int n_instantiations = 1; | |
| 899 int n_totalrecursions = 0; | |
| 900 for (TemplateInstance cur = this; cur; cur = cur.tinst) | |
| 901 { | |
| 902 ++n_instantiations; | |
| 903 // If two instantiations use the same declaration, they are recursive. | |
| 904 // (this works even if they are instantiated from different places in the | |
| 905 // same template). | |
| 906 // In principle, we could also check for multiple-template recursion, but it's | |
| 907 // probably not worthwhile. | |
| 908 if (cur.tinst && cur.tempdecl && cur.tinst.tempdecl | |
| 909 && cur.tempdecl.loc.equals(cur.tinst.tempdecl.loc)) | |
| 910 ++n_totalrecursions; | |
| 911 } | |
| 912 | |
| 913 // show full trace only if it's short or verbose is on | |
| 914 if (n_instantiations <= max_shown || global.params.verbose) | |
| 915 { | |
| 916 for (TemplateInstance cur = this; cur; cur = cur.tinst) | |
| 917 { | |
| 918 fprintf(stdmsg, format, cur.loc.toChars(), cur.toChars()); | |
| 919 } | |
| 920 } | |
| 921 else if (n_instantiations - n_totalrecursions <= max_shown) | |
| 922 { | |
| 923 // By collapsing recursive instantiations into a single line, | |
| 924 // we can stay under the limit. | |
| 925 int recursionDepth=0; | |
| 926 for (TemplateInstance cur = this; cur; cur = cur.tinst) | |
| 927 { | |
| 928 if (cur.tinst && cur.tempdecl && cur.tinst.tempdecl | |
| 929 && cur.tempdecl.loc.equals(cur.tinst.tempdecl.loc)) | |
| 930 { | |
| 931 ++recursionDepth; | |
| 932 } | |
| 933 else | |
| 934 { | |
| 935 if (recursionDepth) | |
| 936 fprintf(stdmsg, "%s: %d recursive instantiations from here: %s\n", cur.loc.toChars(), recursionDepth+2, cur.toChars()); | |
| 937 else | |
| 938 fprintf(stdmsg,format, cur.loc.toChars(), cur.toChars()); | |
| 939 recursionDepth = 0; | |
| 940 } | |
| 941 } | |
| 942 } | |
| 943 else | |
| 944 { | |
| 945 // Even after collapsing the recursions, the depth is too deep. | |
| 946 // Just display the first few and last few instantiations. | |
| 947 size_t i = 0; | |
| 948 for (TemplateInstance cur = this; cur; cur = cur.tinst) | |
| 949 { | |
| 950 if (i == max_shown / 2) | |
| 951 fprintf(stdmsg," ... (%d instantiations, -v to show) ...\n", n_instantiations - max_shown); | |
| 952 | |
| 953 if (i < max_shown / 2 || | |
| 954 i >= n_instantiations - max_shown + max_shown / 2) | |
| 955 fprintf(stdmsg, format, cur.loc.toChars(), cur.toChars()); | |
| 956 ++i; | |
| 957 } | |
| 958 } | |
| 959 +/ | |
| 0 | 960 } |
| 961 | |
| 72 | 962 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 963 { |
| 964 version (LOG) { | |
| 965 printf("TemplateInstance.toObjFile('%s', this = %p)\n", toChars(), this); | |
| 966 } | |
| 967 if (!errors && members) | |
| 968 { | |
| 969 if (multiobj) | |
| 970 // Append to list of object files to be written later | |
| 971 obj_append(this); | |
| 972 else | |
| 973 { | |
|
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974 foreach(Dsymbol s; members) |
| 0 | 975 s.toObjFile(multiobj); |
| 976 } | |
| 977 } | |
| 978 } | |
| 979 | |
| 980 // Internal | |
| 981 /********************************** | |
| 982 * Input: | |
| 983 * flags 1: replace const variables with their initializers | |
| 984 */ | |
| 985 static void semanticTiargs(Loc loc, Scope sc, Objects tiargs, int flags) | |
| 986 { | |
| 987 // Run semantic on each argument, place results in tiargs[] | |
| 988 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 989 if (!tiargs) | |
| 990 return; | |
| 991 for (size_t j = 0; j < tiargs.dim; j++) | |
| 992 { | |
|
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993 Object o = tiargs[j]; |
| 0 | 994 Type ta = isType(o); |
| 995 Expression ea = isExpression(o); | |
| 996 Dsymbol sa = isDsymbol(o); | |
| 997 | |
| 998 //printf("1: tiargs.data[%d] = %p, %p, %p, ea=%p, ta=%p\n", j, o, isDsymbol(o), isTuple(o), ea, ta); | |
| 999 if (ta) | |
| 1000 { | |
| 1001 //printf("type %s\n", ta.toChars()); | |
| 1002 // It might really be an Expression or an Alias | |
| 1003 ta.resolve(loc, sc, &ea, &ta, &sa); | |
| 1004 if (ea) | |
| 1005 { | |
| 1006 ea = ea.semantic(sc); | |
| 1007 /* This test is to skip substituting a const var with | |
| 1008 * its initializer. The problem is the initializer won't | |
| 1009 * match with an 'alias' parameter. Instead, do the | |
| 1010 * const substitution in TemplateValueParameter.matchArg(). | |
| 1011 */ | |
| 1012 if (ea.op != TOKvar || flags & 1) | |
| 1013 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1014 | |
|
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1015 tiargs[j] = ea; |
| 0 | 1016 } |
| 1017 else if (sa) | |
| 1018 { | |
|
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1019 tiargs[j] = sa; |
| 0 | 1020 TupleDeclaration d = sa.toAlias().isTupleDeclaration(); |
| 1021 if (d) | |
| 1022 { | |
| 1023 size_t dim = d.objects.dim; | |
| 1024 tiargs.remove(j); | |
| 1025 tiargs.insert(j, d.objects); | |
| 1026 j--; | |
| 1027 } | |
| 1028 } | |
| 1029 else if (ta) | |
| 1030 { | |
| 1031 Ltype: | |
| 1032 if (ta.ty == Ttuple) | |
| 1033 { | |
| 1034 // Expand tuple | |
|
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1035 auto tt = cast(TypeTuple)ta; |
| 0 | 1036 size_t dim = tt.arguments.dim; |
| 1037 tiargs.remove(j); | |
| 1038 if (dim) | |
| 1039 { | |
| 1040 tiargs.reserve(dim); | |
| 1041 for (size_t i = 0; i < dim; i++) | |
| 1042 { | |
|
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1043 auto arg = tt.arguments[i]; |
|
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1044 tiargs.insert(j + i, arg.type); |
| 0 | 1045 } |
| 1046 } | |
| 1047 j--; | |
| 1048 } | |
| 1049 else | |
|
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1050 tiargs[j] = ta; |
| 0 | 1051 } |
| 1052 else | |
| 1053 { | |
| 1054 assert(global.errors); | |
|
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|
1055 tiargs[j] = Type.terror; |
| 0 | 1056 } |
| 1057 } | |
| 1058 else if (ea) | |
| 1059 { | |
| 1060 if (!ea) | |
| 1061 { | |
| 1062 assert(global.errors); | |
| 1063 ea = new IntegerExp(0); | |
| 1064 } | |
| 1065 assert(ea); | |
| 1066 ea = ea.semantic(sc); | |
| 1067 if (ea.op != TOKvar || flags & 1) | |
| 1068 ea = ea.optimize(WANTvalue | WANTinterpret); | |
|
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|
1069 tiargs[j] = ea; |
| 0 | 1070 if (ea.op == TOKtype) |
| 1071 { | |
| 1072 ta = ea.type; | |
| 1073 goto Ltype; | |
| 1074 } | |
| 1075 if (ea.op == TOKtuple) | |
| 1076 { | |
| 1077 // Expand tuple | |
|
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|
1078 auto te = cast(TupleExp)ea; |
| 0 | 1079 size_t dim = te.exps.dim; |
| 1080 tiargs.remove(j); | |
| 1081 if (dim) | |
| 1082 { | |
| 1083 tiargs.reserve(dim); | |
| 1084 for (size_t i = 0; i < dim; i++) | |
|
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|
1085 tiargs.insert(j + i, te.exps[i]); |
| 0 | 1086 } |
| 1087 j--; | |
| 1088 } | |
| 1089 } | |
| 1090 else if (sa) | |
| 1091 { | |
| 1092 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 1093 if (td && !td.semanticRun && td.literal) | |
| 1094 td.semantic(sc); | |
| 1095 } | |
| 1096 else | |
| 1097 { | |
| 1098 assert(0); | |
| 1099 } | |
| 1100 //printf("1: tiargs.data[%d] = %p\n", j, tiargs.data[j]); | |
| 1101 } | |
| 1102 | |
| 1103 static if (false) { | |
| 1104 printf("-TemplateInstance.semanticTiargs('%s', this=%p)\n", toChars(), this); | |
| 1105 for (size_t j = 0; j < tiargs.dim; j++) | |
| 1106 { | |
| 1107 Object o = cast(Object)tiargs.data[j]; | |
| 1108 Type ta = isType(o); | |
| 1109 Expression ea = isExpression(o); | |
| 1110 Dsymbol sa = isDsymbol(o); | |
| 1111 Tuple va = isTuple(o); | |
| 1112 | |
| 1113 printf("\ttiargs[%d] = ta %p, ea %p, sa %p, va %p\n", j, ta, ea, sa, va); | |
| 1114 } | |
| 1115 } | |
| 1116 } | |
| 1117 | |
| 1118 void semanticTiargs(Scope sc) | |
| 1119 { | |
| 1120 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 1121 if (semantictiargsdone) | |
| 1122 return; | |
| 1123 | |
| 1124 semantictiargsdone = 1; | |
| 1125 semanticTiargs(loc, sc, tiargs, 0); | |
| 1126 } | |
| 1127 | |
| 1128 /********************************************** | |
| 1129 * Find template declaration corresponding to template instance. | |
| 1130 */ | |
| 1131 TemplateDeclaration findTemplateDeclaration(Scope sc) | |
| 1132 { | |
| 1133 //printf("TemplateInstance.findTemplateDeclaration() %s\n", toChars()); | |
| 1134 if (!tempdecl) | |
| 1135 { | |
| 1136 /* Given: | |
| 1137 * foo!( ... ) | |
| 1138 * figure out which TemplateDeclaration foo refers to. | |
| 1139 */ | |
| 1140 Dsymbol s; | |
| 1141 Dsymbol scopesym; | |
| 1142 int i; | |
| 1143 | |
| 1144 Identifier id = name; | |
| 1145 s = sc.search(loc, id, &scopesym); | |
| 1146 if (!s) | |
| 1147 { | |
| 135 | 1148 error("template '%s' is not defined", id.toChars()); |
| 0 | 1149 return null; |
| 1150 } | |
| 135 | 1151 |
| 1152 /* If an OverloadSet, look for a unique member that is a template declaration | |
| 1153 */ | |
| 1154 OverloadSet os = s.isOverloadSet(); | |
| 1155 if (os) | |
| 1156 { | |
| 1157 s = null; | |
| 1158 foreach (s2; os.a) | |
| 1159 { | |
| 1160 if (s2.isTemplateDeclaration()) | |
| 1161 { | |
| 1162 if (s) | |
| 1163 error("ambiguous template declaration %s and %s", s.toPrettyChars(), s2.toPrettyChars()); | |
| 1164 s = s2; | |
| 1165 } | |
| 1166 } | |
| 1167 if (!s) | |
| 1168 { | |
| 1169 error("template '%s' is not defined", id.toChars()); | |
| 1170 return null; | |
| 1171 } | |
| 1172 } | |
| 1173 | |
| 0 | 1174 version (LOG) { |
| 1175 printf("It's an instance of '%s' kind '%s'\n", s.toChars(), s.kind()); | |
| 1176 if (s.parent) | |
| 1177 printf("s.parent = '%s'\n", s.parent.toChars()); | |
| 1178 } | |
| 1179 withsym = scopesym.isWithScopeSymbol(); | |
| 1180 | |
| 1181 /* We might have found an alias within a template when | |
| 1182 * we really want the template. | |
| 1183 */ | |
| 1184 TemplateInstance ti; | |
| 1185 if (s.parent && | |
| 1186 (ti = s.parent.isTemplateInstance()) !is null) | |
| 1187 { | |
| 1188 if ( | |
| 1189 (ti.name == id || | |
| 1190 ti.toAlias().ident == id) | |
| 1191 && | |
| 1192 ti.tempdecl | |
| 1193 ) | |
| 1194 { | |
| 1195 /* This is so that one can refer to the enclosing | |
| 1196 * template, even if it has the same name as a member | |
| 1197 * of the template, if it has a !(arguments) | |
| 1198 */ | |
| 1199 tempdecl = ti.tempdecl; | |
| 1200 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1201 tempdecl = tempdecl.overroot; // then get the start | |
| 1202 | |
| 1203 s = tempdecl; | |
| 1204 } | |
| 1205 } | |
| 1206 | |
| 1207 s = s.toAlias(); | |
| 1208 | |
| 1209 /* It should be a TemplateDeclaration, not some other symbol | |
| 1210 */ | |
| 1211 tempdecl = s.isTemplateDeclaration(); | |
| 1212 if (!tempdecl) | |
| 1213 { | |
| 1214 if (!s.parent && global.errors) | |
| 1215 return null; | |
| 1216 if (!s.parent && s.getType()) | |
| 1217 { | |
| 1218 Dsymbol s2 = s.getType().toDsymbol(sc); | |
| 1219 if (!s2) | |
| 1220 { | |
| 1221 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1222 return null; | |
| 1223 } | |
| 1224 s = s2; | |
| 1225 } | |
| 1226 debug { | |
| 1227 //if (!s.parent) printf("s = %s %s\n", s.kind(), s.toChars()); | |
| 1228 } | |
| 1229 //assert(s.parent); | |
| 1230 TemplateInstance ti2 = s.parent ? s.parent.isTemplateInstance() : null; | |
| 1231 if (ti2 && | |
| 1232 (ti2.name == id || | |
| 1233 ti2.toAlias().ident == id) | |
| 1234 && | |
| 1235 ti2.tempdecl | |
| 1236 ) | |
| 1237 { | |
| 1238 /* This is so that one can refer to the enclosing | |
| 1239 * template, even if it has the same name as a member | |
| 1240 * of the template, if it has a !(arguments) | |
| 1241 */ | |
| 1242 tempdecl = ti2.tempdecl; | |
| 1243 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1244 tempdecl = tempdecl.overroot; // then get the start | |
| 1245 } | |
| 1246 else | |
| 1247 { | |
| 1248 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1249 return null; | |
| 1250 } | |
| 1251 } | |
| 1252 } | |
| 1253 else | |
| 1254 assert(tempdecl.isTemplateDeclaration()); | |
| 1255 | |
| 1256 return tempdecl; | |
| 1257 } | |
| 1258 | |
| 1259 TemplateDeclaration findBestMatch(Scope sc) | |
| 1260 { | |
| 1261 /* Since there can be multiple TemplateDeclaration's with the same | |
| 1262 * name, look for the best match. | |
| 1263 */ | |
| 1264 TemplateDeclaration td_ambig = null; | |
| 1265 TemplateDeclaration td_best = null; | |
| 1266 MATCH m_best = MATCHnomatch; | |
| 1267 scope Objects dedtypes = new Objects(); | |
| 1268 | |
| 1269 version (LOG) { | |
| 1270 printf("TemplateInstance.findBestMatch()\n"); | |
| 1271 } | |
| 1272 // First look for forward references | |
| 1273 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1274 { | |
| 1275 if (!td.semanticRun) | |
| 1276 { | |
| 1277 if (td.scope_) | |
| 1278 { | |
| 1279 // Try to fix forward reference | |
| 1280 td.semantic(td.scope_); | |
| 1281 } | |
| 1282 if (!td.semanticRun) | |
| 1283 { | |
| 1284 error("%s forward references template declaration %s\n", toChars(), td.toChars()); | |
| 1285 return null; | |
| 1286 } | |
| 1287 } | |
| 1288 } | |
| 1289 | |
| 1290 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1291 { | |
| 1292 MATCH m; | |
| 1293 | |
| 1294 //if (tiargs.dim) printf("2: tiargs.dim = %d, data[0] = %p\n", tiargs.dim, tiargs.data[0]); | |
| 1295 | |
| 1296 // If more arguments than parameters, | |
| 1297 // then this is no match. | |
| 1298 if (td.parameters.dim < tiargs.dim) | |
| 1299 { | |
| 1300 if (!td.isVariadic()) | |
| 1301 continue; | |
| 1302 } | |
| 1303 | |
| 1304 dedtypes.setDim(td.parameters.dim); | |
| 1305 dedtypes.zero(); | |
| 1306 assert(td.semanticRun); | |
| 1307 m = td.matchWithInstance(this, dedtypes, 0); | |
| 1308 //printf("matchWithInstance = %d\n", m); | |
| 1309 if (!m) // no match at all | |
| 1310 continue; | |
| 1311 | |
| 1312 if (m < m_best) | |
| 1313 goto Ltd_best; | |
| 1314 if (m > m_best) | |
| 1315 goto Ltd; | |
| 1316 | |
| 1317 { | |
| 1318 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1319 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1320 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1321 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1322 | |
| 1323 if (c1 > c2) | |
| 1324 goto Ltd; | |
| 1325 else if (c1 < c2) | |
| 1326 goto Ltd_best; | |
| 1327 else | |
| 1328 goto Lambig; | |
| 1329 } | |
| 1330 | |
| 1331 Lambig: // td_best and td are ambiguous | |
| 1332 td_ambig = td; | |
| 1333 continue; | |
| 1334 | |
| 1335 Ltd_best: // td_best is the best match so far | |
| 1336 td_ambig = null; | |
| 1337 continue; | |
| 1338 | |
| 1339 Ltd: // td is the new best match | |
| 1340 td_ambig = null; | |
| 1341 td_best = td; | |
| 1342 m_best = m; | |
| 1343 tdtypes.setDim(dedtypes.dim); | |
|
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1344 memcpy(tdtypes.ptr, dedtypes.ptr, tdtypes.dim * (void*).sizeof); |
| 0 | 1345 continue; |
| 1346 } | |
| 1347 | |
| 1348 if (!td_best) | |
| 1349 { | |
| 1350 if (tempdecl && !tempdecl.overnext) | |
| 1351 // Only one template, so we can give better error message | |
| 1352 error("%s does not match template declaration %s", toChars(), tempdecl.toChars()); | |
| 1353 else | |
| 1354 error("%s does not match any template declaration", toChars()); | |
| 1355 return null; | |
| 1356 } | |
| 1357 | |
| 1358 if (td_ambig) | |
| 1359 { | |
| 1360 error("%s matches more than one template declaration, %s and %s", | |
| 1361 toChars(), td_best.toChars(), td_ambig.toChars()); | |
| 1362 } | |
| 1363 | |
| 1364 /* The best match is td_best | |
| 1365 */ | |
| 1366 tempdecl = td_best; | |
| 1367 | |
| 1368 static if (false) { | |
| 1369 /* Cast any value arguments to be same type as value parameter | |
| 1370 */ | |
| 1371 for (size_t i = 0; i < tiargs.dim; i++) | |
| 1372 { | |
| 1373 Object o = cast(Object)tiargs.data[i]; | |
| 1374 Expression ea = isExpression(o); // value argument | |
| 1375 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1376 assert(tp); | |
| 1377 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1378 if (tvp) | |
| 1379 { | |
| 1380 assert(ea); | |
| 1381 ea = ea.castTo(tvp.valType); | |
| 1382 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1383 tiargs.data[i] = cast(Object)ea; | |
| 1384 } | |
| 1385 } | |
| 1386 } | |
| 1387 | |
| 1388 version (LOG) { | |
| 1389 printf("\tIt's a match with template declaration '%s'\n", tempdecl.toChars()); | |
| 1390 } | |
| 1391 return tempdecl; | |
| 1392 } | |
| 1393 | |
| 1394 /**************************************************** | |
| 1395 * Declare parameters of template instance, initialize them with the | |
| 1396 * template instance arguments. | |
| 1397 */ | |
| 1398 void declareParameters(Scope sc) | |
| 1399 { | |
|
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1400 //printf("TemplateInstance.declareParameters()\n"); |
| 0 | 1401 for (int i = 0; i < tdtypes.dim; i++) |
| 1402 { | |
|
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1403 auto tp = tempdecl.parameters[i]; |
| 0 | 1404 //Object o = cast(Object)tiargs.data[i]; |
|
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1405 Object o = tdtypes[i]; // initializer for tp |
| 0 | 1406 |
| 1407 //printf("\ttdtypes[%d] = %p\n", i, o); | |
| 1408 tempdecl.declareParameter(sc, tp, o); | |
| 1409 } | |
| 1410 } | |
| 1411 | |
| 1412 /***************************************** | |
| 1413 * Determines if a TemplateInstance will need a nested | |
| 1414 * generation of the TemplateDeclaration. | |
| 1415 */ | |
| 1416 bool hasNestedArgs(Objects args) | |
| 1417 { | |
| 1418 bool nested = false; | |
|
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1419 //printf("TemplateInstance.hasNestedArgs('%s')\n", tempdecl.ident.toChars()); |
| 0 | 1420 |
| 1421 /* A nested instance happens when an argument references a local | |
| 1422 * symbol that is on the stack. | |
| 1423 */ | |
| 1424 for (size_t i = 0; i < args.dim; i++) | |
| 1425 { | |
|
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1426 Object o = args[i]; |
| 0 | 1427 Expression ea = isExpression(o); |
| 1428 Dsymbol sa = isDsymbol(o); | |
| 1429 Tuple va = isTuple(o); | |
| 1430 if (ea) | |
| 1431 { | |
| 1432 if (ea.op == TOKvar) | |
| 1433 { | |
| 1434 sa = (cast(VarExp)ea).var; | |
| 1435 goto Lsa; | |
| 1436 } | |
| 1437 if (ea.op == TOKfunction) | |
| 1438 { | |
| 1439 sa = (cast(FuncExp)ea).fd; | |
| 1440 goto Lsa; | |
| 1441 } | |
| 1442 } | |
| 1443 else if (sa) | |
| 1444 { | |
| 1445 Lsa: | |
| 1446 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 96 | 1447 Declaration d = sa.isDeclaration(); |
| 1448 if ((td && td.literal) || | |
| 1449 (d && !d.isDataseg() && | |
| 1450 | |
| 1451 /// version (DMDV2) { // TODO: | |
| 0 | 1452 !(d.storage_class & STCmanifest) && |
| 1453 /// } | |
| 1454 (!d.isFuncDeclaration() || d.isFuncDeclaration().isNested()) && | |
| 96 | 1455 !isTemplateMixin() |
| 1456 )) | |
| 0 | 1457 { |
| 1458 // if module level template | |
| 1459 if (tempdecl.toParent().isModule()) | |
| 1460 { | |
| 1461 Dsymbol dparent = sa.toParent(); | |
| 1462 if (!isnested) | |
| 1463 isnested = dparent; | |
| 1464 else if (isnested != dparent) | |
| 1465 { | |
| 1466 /* Select the more deeply nested of the two. | |
| 1467 * Error if one is not nested inside the other. | |
| 1468 */ | |
| 1469 for (Dsymbol p = isnested; p; p = p.parent) | |
| 1470 { | |
| 1471 if (p == dparent) | |
| 1472 goto L1; // isnested is most nested | |
| 1473 } | |
| 1474 for (Dsymbol p = dparent; p; p = p.parent) | |
| 1475 { | |
| 1476 if (p == isnested) | |
| 1477 { | |
| 1478 isnested = dparent; | |
| 1479 goto L1; // dparent is most nested | |
| 1480 } | |
| 1481 } | |
| 1482 error("%s is nested in both %s and %s", | |
| 1483 toChars(), isnested.toChars(), dparent.toChars()); | |
| 1484 } | |
| 1485 L1: | |
| 1486 //printf("\tnested inside %s\n", isnested.toChars()); | |
| 1487 nested |= 1; | |
| 1488 } | |
| 1489 else | |
| 1490 error("cannot use local '%s' as parameter to non-global template %s", d.toChars(), tempdecl.toChars()); | |
| 1491 } | |
| 1492 } | |
| 1493 else if (va) | |
| 1494 { | |
| 1495 nested |= hasNestedArgs(va.objects); | |
| 1496 } | |
| 1497 } | |
| 1498 return nested; | |
| 1499 } | |
| 1500 | |
| 1501 /**************************************** | |
| 1502 * This instance needs an identifier for name mangling purposes. | |
| 1503 * Create one by taking the template declaration name and adding | |
| 1504 * the type signature for it. | |
| 1505 */ | |
| 1506 Identifier genIdent() | |
| 1507 { | |
| 1508 scope OutBuffer buf = new OutBuffer(); | |
| 1509 | |
|
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|
1510 //printf("TemplateInstance.genIdent('%s')\n", tempdecl.ident.toChars()); |
| 96 | 1511 string id = tempdecl.ident.toChars(); |
| 0 | 1512 buf.printf("__T%d%s", id.length, id); ///! |
| 96 | 1513 Objects args = tiargs; |
| 0 | 1514 for (int i = 0; i < args.dim; i++) |
| 1515 { | |
|
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1516 Object o = args[i]; |
| 0 | 1517 Type ta = isType(o); |
| 1518 Expression ea = isExpression(o); | |
| 1519 Dsymbol sa = isDsymbol(o); | |
| 1520 Tuple va = isTuple(o); | |
| 1521 //printf("\to [%d] %p ta %p ea %p sa %p va %p\n", i, o, ta, ea, sa, va); | |
| 1522 if (ta) | |
| 1523 { | |
| 1524 buf.writeByte('T'); | |
| 1525 if (ta.deco) | |
| 1526 buf.writestring(ta.deco); | |
| 1527 else | |
| 1528 { | |
| 1529 debug writef("ta = %d, %s\n", ta.ty, ta.toChars()); | |
| 1530 assert(global.errors); | |
| 1531 } | |
| 1532 } | |
| 1533 else if (ea) | |
| 1534 { | |
| 1535 Lea: | |
| 1536 long v; | |
| 1537 real r; | |
| 1538 | |
| 1539 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1540 if (ea.op == TOKvar) | |
| 1541 { | |
| 1542 sa = (cast(VarExp)ea).var; | |
| 1543 ea = null; | |
| 1544 goto Lsa; | |
| 1545 } | |
| 1546 if (ea.op == TOKfunction) | |
| 1547 { | |
| 1548 sa = (cast(FuncExp)ea).fd; | |
| 1549 ea = null; | |
| 1550 goto Lsa; | |
| 1551 } | |
| 1552 buf.writeByte('V'); | |
| 1553 if (ea.op == TOKtuple) | |
| 1554 { | |
| 1555 ea.error("tuple is not a valid template value argument"); | |
| 1556 continue; | |
| 1557 } | |
| 1558 static if (true) { | |
| 1559 /* Use deco that matches what it would be for a function parameter | |
| 1560 */ | |
| 1561 buf.writestring(ea.type.deco); | |
| 1562 } else { | |
| 1563 // Use type of parameter, not type of argument | |
| 1564 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1565 assert(tp); | |
| 1566 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1567 assert(tvp); | |
| 1568 buf.writestring(tvp.valType.deco); | |
| 1569 } | |
| 1570 ea.toMangleBuffer(buf); | |
| 1571 } | |
| 1572 else if (sa) | |
| 1573 { | |
| 1574 Lsa: | |
| 1575 buf.writeByte('S'); | |
| 1576 Declaration d = sa.isDeclaration(); | |
| 1577 if (d && (!d.type || !d.type.deco)) | |
| 1578 { | |
| 1579 error("forward reference of %s", d.toChars()); | |
| 1580 continue; | |
| 1581 } | |
| 1582 static if (false) { | |
| 1583 VarDeclaration v = sa.isVarDeclaration(); | |
| 1584 if (v && v.storage_class & STCmanifest) | |
| 1585 { | |
| 1586 ExpInitializer ei = v.init.isExpInitializer(); | |
| 1587 if (ei) | |
| 1588 { | |
| 1589 ea = ei.exp; | |
| 1590 goto Lea; | |
| 1591 } | |
| 1592 } | |
| 1593 } | |
| 1594 string p = sa.mangle(); | |
| 62 | 1595 ///buf.printf("%zu%s", p.length, p); |
| 1596 buf.printf("%su%s", p.length, p); | |
| 0 | 1597 } |
| 1598 else if (va) | |
| 1599 { | |
| 1600 assert(i + 1 == args.dim); // must be last one | |
| 1601 args = va.objects; | |
| 1602 i = -1; | |
| 1603 } | |
| 1604 else | |
| 1605 assert(0); | |
| 1606 } | |
| 1607 buf.writeByte('Z'); | |
| 1608 id = buf.toChars(); | |
| 1609 buf.data = null; | |
| 1610 //printf("\tgenIdent = %s\n", id); | |
| 1611 return new Identifier(id, TOKidentifier); | |
| 1612 } | |
| 1613 | |
| 72 | 1614 override TemplateInstance isTemplateInstance() { return this; } |
| 0 | 1615 |
| 72 | 1616 override AliasDeclaration isAliasDeclaration() |
| 0 | 1617 { |
| 1618 assert(false); | |
| 1619 } | |
|
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|
1620 } |