Mercurial > projects > ddmd
annotate dmd/TemplateInstance.d @ 131:206db751bd4c
dmdfe 2.037 compiles now
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Fri, 10 Sep 2010 00:27:37 +0100 |
| parents | 60bb0fe4563e |
| children | af1bebfd96a4 |
| 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; |
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43 import dmd.templates.Util; |
| 0 | 44 |
| 45 import dmd.backend.glue; | |
| 46 | |
| 47 Tuple isTuple(Object o) | |
| 48 { | |
| 49 //return dynamic_cast<Tuple *>(o); | |
| 50 ///if (!o || o.dyncast() != DYNCAST_TUPLE) | |
| 51 /// return null; | |
| 52 return cast(Tuple)o; | |
| 53 } | |
| 54 | |
| 55 /****************************** | |
| 56 * If o1 matches o2, return 1. | |
| 57 * Else, return 0. | |
| 58 */ | |
| 59 | |
| 60 bool match(Object o1, Object o2, TemplateDeclaration tempdecl, Scope sc) | |
| 61 { | |
| 62 Type t1 = isType(o1); | |
| 63 Type t2 = isType(o2); | |
| 64 Expression e1 = isExpression(o1); | |
| 65 Expression e2 = isExpression(o2); | |
| 66 Dsymbol s1 = isDsymbol(o1); | |
| 67 Dsymbol s2 = isDsymbol(o2); | |
| 68 Tuple v1 = isTuple(o1); | |
| 69 Tuple v2 = isTuple(o2); | |
| 70 | |
| 71 //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); | |
| 72 | |
| 73 /* A proper implementation of the various equals() overrides | |
| 74 * should make it possible to just do o1.equals(o2), but | |
| 75 * we'll do that another day. | |
| 76 */ | |
| 77 | |
| 78 if (t1) | |
| 79 { | |
| 80 /* if t1 is an instance of ti, then give error | |
| 81 * about recursive expansions. | |
| 82 */ | |
| 83 Dsymbol s = t1.toDsymbol(sc); | |
| 84 if (s && s.parent) | |
| 85 { | |
| 86 TemplateInstance ti1 = s.parent.isTemplateInstance(); | |
| 87 if (ti1 && ti1.tempdecl == tempdecl) | |
| 88 { | |
| 89 for (Scope sc1 = sc; sc1; sc1 = sc1.enclosing) | |
| 90 { | |
| 91 if (sc1.scopesym == ti1) | |
| 92 { | |
| 93 error("recursive template expansion for template argument %s", t1.toChars()); | |
| 94 return true; // fake a match | |
| 95 } | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 //printf("t1 = %s\n", t1.toChars()); | |
| 101 //printf("t2 = %s\n", t2.toChars()); | |
| 102 if (!t2 || !t1.equals(t2)) | |
| 103 goto Lnomatch; | |
| 104 } | |
| 105 else if (e1) | |
| 106 { | |
| 107 static if (false) { | |
| 108 if (e1 && e2) | |
| 109 { | |
| 110 printf("match %d\n", e1.equals(e2)); | |
| 111 e1.print(); | |
| 112 e2.print(); | |
| 113 e1.type.print(); | |
| 114 e2.type.print(); | |
| 115 } | |
| 116 } | |
| 117 if (!e2) | |
| 118 goto Lnomatch; | |
| 119 if (!e1.equals(e2)) | |
| 120 goto Lnomatch; | |
| 121 } | |
| 122 else if (s1) | |
| 123 { | |
| 124 //printf("%p %s, %p %s\n", s1, s1.toChars(), s2, s2.toChars()); | |
| 125 if (!s2 || !s1.equals(s2) || s1.parent != s2.parent) | |
| 126 { | |
| 127 goto Lnomatch; | |
| 128 } | |
| 129 version (DMDV2) { | |
| 130 VarDeclaration vv1 = s1.isVarDeclaration(); | |
| 131 VarDeclaration vv2 = s2.isVarDeclaration(); | |
| 132 if (vv1 && vv2 && vv1.storage_class & vv2.storage_class & STCmanifest) | |
| 133 { | |
| 134 ExpInitializer ei1 = vv1.init.isExpInitializer(); | |
| 135 ExpInitializer ei2 = vv2.init.isExpInitializer(); | |
| 136 if (ei1 && ei2 && !ei1.exp.equals(ei2.exp)) | |
| 137 goto Lnomatch; | |
| 138 } | |
| 139 } | |
| 140 } | |
| 141 else if (v1) | |
| 142 { | |
| 143 if (!v2) | |
| 144 goto Lnomatch; | |
| 145 | |
| 146 if (v1.objects.dim != v2.objects.dim) | |
| 147 goto Lnomatch; | |
| 148 | |
| 149 for (size_t i = 0; i < v1.objects.dim; i++) | |
| 150 { | |
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151 if (!match(v1.objects[i], v2.objects[i], tempdecl, sc)) |
| 0 | 152 goto Lnomatch; |
| 153 } | |
| 154 } | |
| 155 //printf("match\n"); | |
| 156 return true; // match | |
| 157 | |
| 158 Lnomatch: | |
| 159 //printf("nomatch\n"); | |
| 160 return false; // nomatch; | |
| 161 } | |
| 162 | |
| 163 class TemplateInstance : ScopeDsymbol | |
| 164 { | |
| 165 /* Given: | |
| 166 * foo!(args) => | |
| 167 * name = foo | |
| 168 * tiargs = args | |
| 169 */ | |
| 170 Identifier name; | |
| 171 //Array idents; | |
| 172 Objects tiargs; // Array of Types/Expressions of template | |
| 173 // instance arguments [int*, char, 10*10] | |
| 174 | |
| 175 Objects tdtypes; // Array of Types/Expressions corresponding | |
| 176 // to TemplateDeclaration.parameters | |
| 177 // [int, char, 100] | |
| 178 | |
| 179 TemplateDeclaration tempdecl; // referenced by foo.bar.abc | |
| 180 TemplateInstance inst; // refer to existing instance | |
| 181 TemplateInstance tinst; // enclosing template instance | |
| 182 ScopeDsymbol argsym; // argument symbol table | |
| 183 AliasDeclaration aliasdecl; // !=null if instance is an alias for its | |
| 184 // sole member | |
| 185 WithScopeSymbol withsym; // if a member of a with statement | |
| 186 int semanticRun; // has semantic() been done? | |
| 187 int semantictiargsdone; // has semanticTiargs() been done? | |
| 188 int nest; // for recursion detection | |
| 189 int havetempdecl; // 1 if used second constructor | |
| 190 Dsymbol isnested; // if referencing local symbols, this is the context | |
| 191 int errors; // 1 if compiled with errors | |
| 192 version (IN_GCC) { | |
| 193 /* On some targets, it is necessary to know whether a symbol | |
| 194 will be emitted in the output or not before the symbol | |
| 195 is used. This can be different from getModule(). */ | |
| 196 Module objFileModule; | |
| 197 } | |
| 198 | |
| 199 this(Loc loc, Identifier ident) | |
| 200 { | |
| 201 super(null); | |
| 202 | |
| 203 version (LOG) { | |
| 204 printf("TemplateInstance(this = %p, ident = '%s')\n", this, ident ? ident.toChars() : "null"); | |
| 205 } | |
| 206 this.loc = loc; | |
| 207 this.name = ident; | |
| 208 | |
| 209 tdtypes = new Objects(); | |
| 210 } | |
| 211 | |
| 212 /***************** | |
| 213 * This constructor is only called when we figured out which function | |
| 214 * template to instantiate. | |
| 215 */ | |
| 216 this(Loc loc, TemplateDeclaration td, Objects tiargs) | |
| 217 { | |
| 218 super(null); | |
| 219 | |
| 220 version (LOG) { | |
| 221 printf("TemplateInstance(this = %p, tempdecl = '%s')\n", this, td.toChars()); | |
| 222 } | |
| 223 this.loc = loc; | |
| 224 this.name = td.ident; | |
| 225 this.tiargs = tiargs; | |
| 226 this.tempdecl = td; | |
| 227 this.semantictiargsdone = 1; | |
| 228 this.havetempdecl = 1; | |
| 229 | |
| 230 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 231 | |
| 232 tdtypes = new Objects(); | |
| 233 } | |
| 234 | |
| 235 static Objects arraySyntaxCopy(Objects objs) | |
| 236 { | |
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237 Objects a = null; |
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238 if (objs) |
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239 { a = new Objects(); |
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240 a.setDim(objs.dim); |
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241 for (size_t i = 0; i < objs.dim; i++) |
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242 { |
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243 a[i] = objectSyntaxCopy(objs[i]); |
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244 } |
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245 } |
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246 return a; |
| 0 | 247 } |
| 248 | |
| 72 | 249 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 250 { |
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251 TemplateInstance ti; |
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252 |
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253 if (s) |
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254 ti = cast(TemplateInstance)s; |
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255 else |
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256 ti = new TemplateInstance(loc, name); |
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257 |
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258 ti.tiargs = arraySyntaxCopy(tiargs); |
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259 |
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260 ScopeDsymbol.syntaxCopy(ti); |
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261 return ti; |
| 0 | 262 } |
| 263 | |
| 72 | 264 override void semantic(Scope sc) |
| 0 | 265 { |
| 266 if (global.errors) | |
| 267 { | |
| 268 if (!global.gag) | |
| 269 { | |
| 270 /* Trying to soldier on rarely generates useful messages | |
| 271 * at this point. | |
| 272 */ | |
| 273 fatal(); | |
| 274 } | |
| 275 return; | |
| 276 } | |
| 277 | |
| 278 version (LOG) { | |
| 279 printf("\n+TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 280 } | |
| 281 | |
| 282 if (inst) // if semantic() was already run | |
| 283 { | |
| 284 version (LOG) { | |
| 285 printf("-TemplateInstance.semantic('%s', this=%p) already run\n", inst.toChars(), inst); | |
| 286 } | |
| 287 return; | |
| 288 } | |
| 289 | |
| 290 // get the enclosing template instance from the scope tinst | |
| 291 tinst = sc.tinst; | |
| 292 | |
| 293 if (semanticRun != 0) | |
| 294 { | |
| 295 error(loc, "recursive template expansion"); | |
| 296 // inst = this; | |
| 297 return; | |
| 298 } | |
| 299 | |
| 300 semanticRun = 1; | |
| 301 | |
| 302 version (LOG) { | |
| 303 printf("\tdo semantic\n"); | |
| 304 } | |
| 305 if (havetempdecl) | |
| 306 { | |
| 307 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 308 | |
| 309 // Deduce tdtypes | |
| 310 tdtypes.setDim(tempdecl.parameters.dim); | |
| 311 if (!tempdecl.matchWithInstance(this, tdtypes, 2)) | |
| 312 { | |
| 313 error("incompatible arguments for template instantiation"); | |
| 314 inst = this; | |
| 315 return; | |
| 316 } | |
| 317 } | |
| 318 else | |
| 319 { | |
| 320 /* Run semantic on each argument, place results in tiargs[] | |
| 321 * (if we havetempdecl, then tiargs is already evaluated) | |
| 322 */ | |
| 323 semanticTiargs(sc); | |
| 324 | |
| 325 tempdecl = findTemplateDeclaration(sc); | |
| 326 if (tempdecl) | |
| 327 tempdecl = findBestMatch(sc); | |
| 328 | |
| 329 if (!tempdecl || global.errors) | |
| 330 { | |
| 331 inst = this; | |
| 332 //printf("error return %p, %d\n", tempdecl, global.errors); | |
| 333 return; // error recovery | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 hasNestedArgs(tiargs); | |
| 338 | |
| 339 /* See if there is an existing TemplateInstantiation that already | |
| 340 * implements the typeargs. If so, just refer to that one instead. | |
| 341 */ | |
| 342 | |
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343 foreach (ti; tempdecl.instances) |
| 0 | 344 { |
| 345 version (LOG) { | |
| 346 printf("\t%s: checking for match with instance %d (%p): '%s'\n", toChars(), i, ti, ti.toChars()); | |
| 347 } | |
| 348 assert(tdtypes.dim == ti.tdtypes.dim); | |
| 349 | |
| 350 // Nesting must match | |
| 351 if (isnested !is ti.isnested) | |
| 352 { | |
| 353 //printf("test2 isnested %s ti.isnested %s\n", isnested ? isnested.toChars() : "", ti.isnested ? ti.isnested.toChars() : ""); | |
| 354 continue; | |
| 355 } | |
| 356 static if (false) { | |
| 357 if (isnested && sc.parent != ti.parent) | |
| 358 continue; | |
| 359 } | |
| 360 for (size_t j = 0; j < tdtypes.dim; j++) | |
| 361 { | |
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362 Object o1 = tdtypes[j]; |
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363 Object o2 = ti.tdtypes[j]; |
| 0 | 364 if (!match(o1, o2, tempdecl, sc)) |
| 365 { | |
| 366 goto L1; | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 // It's a match | |
| 371 inst = ti; | |
| 372 parent = ti.parent; | |
| 373 version (LOG) { | |
| 374 printf("\tit's a match with instance %p\n", inst); | |
| 375 } | |
| 376 return; | |
| 377 | |
| 378 L1: | |
| 379 ; | |
| 380 } | |
| 381 | |
| 382 /* So, we need to implement 'this' instance. | |
| 383 */ | |
| 384 version (LOG) { | |
| 385 printf("\timplement template instance '%s'\n", toChars()); | |
| 386 } | |
| 387 uint errorsave = global.errors; | |
| 388 inst = this; | |
| 389 int tempdecl_instance_idx = tempdecl.instances.dim; | |
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390 tempdecl.instances.push(this); |
| 0 | 391 parent = tempdecl.parent; |
| 392 //printf("parent = '%s'\n", parent.kind()); | |
| 393 | |
| 394 ident = genIdent(); // need an identifier for name mangling purposes. | |
| 395 | |
| 396 static if (true) { | |
| 397 if (isnested) | |
| 398 parent = isnested; | |
| 399 } | |
| 400 //printf("parent = '%s'\n", parent.kind()); | |
| 401 | |
| 402 // Add 'this' to the enclosing scope's members[] so the semantic routines | |
| 403 // will get called on the instance members | |
| 404 static if (true) { | |
| 405 int dosemantic3 = 0; | |
| 406 { | |
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407 Dsymbols a; |
| 0 | 408 |
| 409 Scope scx = sc; | |
| 410 static if (false) { | |
| 411 for (scx = sc; scx; scx = scx.enclosing) | |
| 412 if (scx.scopesym) | |
| 413 break; | |
| 414 } | |
| 415 | |
| 416 //if (scx && scx.scopesym) printf("3: scx is %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 417 if (scx && scx.scopesym && | |
| 418 scx.scopesym.members && !scx.scopesym.isTemplateMixin() | |
| 419 | |
| 420 /// static if (false) { // removed because it bloated compile times | |
| 421 /// /* The problem is if A imports B, and B imports A, and both A | |
| 422 /// * and B instantiate the same template, does the compilation of A | |
| 423 /// * or the compilation of B do the actual instantiation? | |
| 424 /// * | |
| 425 /// * see bugzilla 2500. | |
| 426 /// */ | |
| 427 /// && !scx.module.selfImports() | |
| 428 /// } | |
| 429 ) | |
| 430 { | |
| 431 //printf("\t1: adding to %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 432 a = scx.scopesym.members; | |
| 433 } | |
| 434 else | |
| 435 { Module m = sc.module_.importedFrom; | |
| 436 //printf("\t2: adding to module %s instead of module %s\n", m.toChars(), sc.module.toChars()); | |
| 437 a = m.members; | |
| 438 if (m.semanticRun >= 3) | |
| 439 dosemantic3 = 1; | |
| 440 } | |
| 441 | |
| 442 for (int i = 0; 1; i++) | |
| 443 { | |
| 444 if (i == a.dim) | |
| 445 { | |
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446 a.push(this); |
| 0 | 447 break; |
| 448 } | |
| 449 | |
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450 if (this is a[i]) // if already in Array |
| 0 | 451 break; |
| 452 } | |
| 453 } | |
| 454 } | |
| 455 | |
| 456 // Copy the syntax trees from the TemplateDeclaration | |
| 457 members = Dsymbol.arraySyntaxCopy(tempdecl.members); | |
| 458 | |
| 459 // Create our own scope for the template parameters | |
| 460 Scope scope_ = tempdecl.scope_; | |
| 461 if (!tempdecl.semanticRun) | |
| 462 { | |
| 463 error("template instantiation %s forward references template declaration %s\n", toChars(), tempdecl.toChars()); | |
| 464 return; | |
| 465 } | |
| 466 | |
| 467 version (LOG) { | |
| 468 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
| 469 } | |
| 470 argsym = new ScopeDsymbol(); | |
| 471 argsym.parent = scope_.parent; | |
| 472 scope_ = scope_.push(argsym); | |
| 473 // scope.stc = 0; | |
| 474 | |
| 475 // Declare each template parameter as an alias for the argument type | |
| 476 Scope paramscope = scope_.push(); | |
| 477 paramscope.stc = STCundefined; | |
| 478 declareParameters(paramscope); | |
| 479 paramscope.pop(); | |
| 480 | |
| 481 // Add members of template instance to template instance symbol table | |
| 482 // parent = scope.scopesym; | |
| 483 symtab = new DsymbolTable(); | |
| 13 | 484 bool memnum = false; |
|
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485 foreach(Dsymbol s; members) |
| 0 | 486 { |
| 487 version (LOG) { | |
| 488 printf("\t[%d] adding member '%s' %p kind %s to '%s', memnum = %d\n", i, s.toChars(), s, s.kind(), this.toChars(), memnum); | |
| 489 } | |
| 490 memnum |= s.addMember(scope_, this, memnum); | |
| 491 } | |
| 492 | |
| 493 version (LOG) { | |
| 494 printf("adding members done\n"); | |
| 495 } | |
| 496 | |
| 497 /* See if there is only one member of template instance, and that | |
| 498 * member has the same name as the template instance. | |
| 499 * If so, this template instance becomes an alias for that member. | |
| 500 */ | |
| 501 //printf("members.dim = %d\n", members.dim); | |
| 502 if (members.dim) | |
| 503 { | |
| 504 Dsymbol s; | |
| 505 if (Dsymbol.oneMembers(members, &s) && s) | |
| 506 { | |
| 507 //printf("s.kind = '%s'\n", s.kind()); | |
| 508 //s.print(); | |
| 509 //printf("'%s', '%s'\n", s.ident.toChars(), tempdecl.ident.toChars()); | |
| 510 if (s.ident && s.ident.equals(tempdecl.ident)) | |
| 511 { | |
| 512 //printf("setting aliasdecl\n"); | |
| 513 aliasdecl = new AliasDeclaration(loc, s.ident, s); | |
| 514 } | |
| 515 } | |
| 516 } | |
| 517 | |
| 518 // Do semantic() analysis on template instance members | |
| 519 version (LOG) { | |
| 520 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
| 521 } | |
| 522 Scope sc2; | |
| 523 sc2 = scope_.push(this); | |
| 524 //printf("isnested = %d, sc.parent = %s\n", isnested, sc.parent.toChars()); | |
| 525 sc2.parent = /*isnested ? sc.parent :*/ this; | |
| 526 sc2.tinst = this; | |
| 527 | |
| 528 try | |
| 529 { | |
| 79 | 530 // static int nest; |
| 0 | 531 //printf("%d\n", nest); |
| 532 if (++nest > 500) | |
| 533 { | |
| 534 global.gag = 0; // ensure error message gets printed | |
| 535 error("recursive expansion"); | |
| 536 fatal(); | |
| 537 } | |
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538 foreach(Dsymbol s; members) |
| 0 | 539 { |
| 540 //printf("\t[%d] semantic on '%s' %p kind %s in '%s'\n", i, s.toChars(), s, s.kind(), this.toChars()); | |
| 541 //printf("test: isnested = %d, sc2.parent = %s\n", isnested, sc2.parent.toChars()); | |
| 542 // if (isnested) | |
| 543 // s.parent = sc.parent; | |
| 544 //printf("test3: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 545 s.semantic(sc2); | |
| 546 //printf("test4: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 547 sc2.module_.runDeferredSemantic(); | |
| 548 } | |
| 549 --nest; | |
| 550 } | |
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551 catch (Exception e) |
| 0 | 552 { |
| 553 global.gag = 0; // ensure error message gets printed | |
| 554 error("recursive expansion"); | |
| 555 fatal(); | |
| 556 } | |
| 557 | |
| 558 /* If any of the instantiation members didn't get semantic() run | |
| 559 * on them due to forward references, we cannot run semantic2() | |
| 560 * or semantic3() yet. | |
| 561 */ | |
| 562 for (size_t i = 0; i < Module.deferred.dim; i++) | |
| 563 { | |
| 564 Dsymbol sd = cast(Dsymbol)Module.deferred.data[i]; | |
| 565 | |
| 566 if (sd.parent is this) | |
| 567 goto Laftersemantic; | |
| 568 } | |
| 569 | |
| 570 /* The problem is when to parse the initializer for a variable. | |
| 571 * Perhaps VarDeclaration.semantic() should do it like it does | |
| 572 * for initializers inside a function. | |
| 573 */ | |
| 574 // if (sc.parent.isFuncDeclaration()) | |
| 575 | |
| 576 /* BUG 782: this has problems if the classes this depends on | |
| 577 * are forward referenced. Find a way to defer semantic() | |
| 578 * on this template. | |
| 579 */ | |
| 580 semantic2(sc2); | |
| 581 | |
| 582 if (sc.func || dosemantic3) | |
| 583 { | |
| 79 | 584 try |
| 585 { | |
| 586 // static int nest; // TODO: | |
| 587 if (++nest > 300) | |
| 588 { | |
| 589 global.gag = 0; // ensure error message gets printed | |
| 590 error("recursive expansion"); | |
| 591 fatal(); | |
| 592 } | |
| 593 semantic3(sc2); | |
| 594 --nest; | |
| 595 } | |
| 596 catch (Exception e) | |
| 597 { | |
| 598 global.gag = 0; // ensure error message gets printed | |
| 599 error("recursive expansion"); | |
| 600 fatal(); | |
| 601 } | |
| 0 | 602 } |
| 603 | |
| 604 Laftersemantic: | |
| 605 sc2.pop(); | |
| 606 | |
| 607 scope_.pop(); | |
| 608 | |
| 609 // Give additional context info if error occurred during instantiation | |
| 610 if (global.errors != errorsave) | |
| 611 { | |
| 612 error("error instantiating"); | |
| 613 if (tinst && !global.gag) | |
| 614 { | |
| 615 tinst.printInstantiationTrace(); | |
| 616 fatal(); | |
| 617 } | |
| 618 errors = 1; | |
| 619 if (global.gag) | |
| 620 tempdecl.instances.remove(tempdecl_instance_idx); | |
| 621 } | |
| 622 | |
| 623 version (LOG) { | |
| 624 printf("-TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 625 } | |
| 626 } | |
| 627 | |
| 72 | 628 override void semantic2(Scope sc) |
| 0 | 629 { |
| 630 if (semanticRun >= 2) | |
| 631 return; | |
| 632 | |
| 633 semanticRun = 2; | |
| 634 version (LOG) { | |
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635 printf("+TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 636 } |
| 637 | |
| 638 if (!errors && members) | |
| 639 { | |
| 640 sc = tempdecl.scope_; | |
| 641 assert(sc); | |
| 642 sc = sc.push(argsym); | |
| 643 sc = sc.push(this); | |
| 644 sc.tinst = this; | |
| 645 | |
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646 foreach(Dsymbol s; members) |
| 0 | 647 { |
| 648 version (LOG) { | |
| 649 printf("\tmember '%s', kind = '%s'\n", s.toChars(), s.kind()); | |
| 650 } | |
| 651 s.semantic2(sc); | |
| 652 } | |
| 653 | |
| 654 sc = sc.pop(); | |
| 655 sc.pop(); | |
| 656 } | |
| 657 | |
| 658 version (LOG) { | |
|
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659 printf("-TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 660 } |
| 661 } | |
| 662 | |
| 72 | 663 override void semantic3(Scope sc) |
| 0 | 664 { |
| 665 version (LOG) { | |
| 666 printf("TemplateInstance.semantic3('%s'), semanticRun = %d\n", toChars(), semanticRun); | |
| 667 } | |
| 668 //if (toChars()[0] == 'D') *(char*)0=0; | |
| 669 if (semanticRun >= 3) | |
| 670 return; | |
| 671 semanticRun = 3; | |
| 672 if (!errors && members) | |
| 673 { | |
| 674 sc = tempdecl.scope_; | |
| 675 sc = sc.push(argsym); | |
| 676 sc = sc.push(this); | |
| 677 sc.tinst = this; | |
|
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678 foreach(Dsymbol s; members) |
| 0 | 679 s.semantic3(sc); |
| 680 sc = sc.pop(); | |
| 681 sc.pop(); | |
| 682 } | |
| 683 } | |
| 684 | |
| 72 | 685 override void inlineScan() |
| 0 | 686 { |
| 687 version (LOG) { | |
| 688 printf("TemplateInstance.inlineScan('%s')\n", toChars()); | |
| 689 } | |
| 690 if (!errors && members) | |
| 691 { | |
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692 foreach(Dsymbol s; members) |
| 0 | 693 s.inlineScan(); |
| 694 } | |
| 695 } | |
| 696 | |
| 72 | 697 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 698 { |
| 699 int i; | |
| 700 | |
| 701 Identifier id = name; | |
| 702 buf.writestring(id.toChars()); | |
| 703 buf.writestring("!("); | |
| 704 if (nest) | |
| 705 buf.writestring("..."); | |
| 706 else | |
| 707 { | |
| 708 nest++; | |
| 709 Objects args = tiargs; | |
| 710 for (i = 0; i < args.dim; i++) | |
| 711 { | |
| 712 if (i) | |
| 713 buf.writeByte(','); | |
|
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714 Object oarg = args[i]; |
| 0 | 715 ObjectToCBuffer(buf, hgs, oarg); |
| 716 } | |
| 717 nest--; | |
| 718 } | |
| 719 buf.writeByte(')'); | |
| 720 } | |
| 721 | |
| 72 | 722 override Dsymbol toAlias() // resolve real symbol |
| 0 | 723 { |
| 79 | 724 version (LOG) |
| 725 { | |
| 726 writef("TemplateInstance.toAlias()\n"); | |
| 0 | 727 } |
| 728 if (!inst) | |
| 729 { | |
| 730 error("cannot resolve forward reference"); | |
| 79 | 731 errors = 1; |
| 0 | 732 return this; |
| 733 } | |
| 734 | |
| 735 if (inst !is this) | |
| 736 return inst.toAlias(); | |
| 737 | |
| 738 if (aliasdecl) | |
| 739 { | |
| 740 return aliasdecl.toAlias(); | |
| 741 } | |
| 742 | |
| 743 return inst; | |
| 744 } | |
| 745 | |
| 72 | 746 override string kind() |
| 0 | 747 { |
|
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748 return "template instance"; |
| 0 | 749 } |
| 750 | |
| 72 | 751 override bool oneMember(Dsymbol* ps) |
| 0 | 752 { |
|
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753 *ps = null; |
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754 return true; |
| 0 | 755 } |
|
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756 |
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757 /***************************************************** |
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758 * Determine if template instance is really a template function, |
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759 * and that template function needs to infer types from the function |
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760 * arguments. |
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761 */ |
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762 |
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763 bool needsTypeInference(Scope sc) |
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764 { |
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765 //printf("TemplateInstance::needsTypeInference() %s\n", toChars()); |
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766 if (!tempdecl) |
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767 tempdecl = findTemplateDeclaration(sc); |
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768 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) |
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769 { |
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770 /* If any of the overloaded template declarations need inference, |
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771 * then return TRUE |
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772 */ |
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773 FuncDeclaration fd; |
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774 if (!td.onemember || |
|
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775 (fd = td.onemember.toAlias().isFuncDeclaration()) is null || |
|
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776 fd.type.ty != TY.Tfunction) |
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777 { |
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778 /* Not a template function, therefore type inference is not possible. |
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779 */ |
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780 //printf("false\n"); |
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781 return false; |
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782 } |
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783 |
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784 /* Determine if the instance arguments, tiargs, are all that is necessary |
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785 * to instantiate the template. |
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786 */ |
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787 TemplateTupleParameter tp = td.isVariadic(); |
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788 //printf("tp = %p, td->parameters->dim = %d, tiargs->dim = %d\n", tp, td->parameters->dim, tiargs->dim); |
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789 TypeFunction fdtype = cast(TypeFunction)fd.type; |
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790 if (Parameter.dim(fdtype.parameters) && |
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791 (tp || tiargs.dim < td.parameters.dim)) |
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792 return true; |
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793 } |
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794 //printf("false\n"); |
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795 return false; |
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796 } |
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797 |
| 72 | 798 override string toChars() |
| 0 | 799 { |
| 800 scope OutBuffer buf = new OutBuffer(); | |
| 801 HdrGenState hgs; | |
| 802 | |
| 803 toCBuffer(buf, &hgs); | |
| 804 return buf.extractString(); | |
| 805 } | |
| 806 | |
| 72 | 807 override string mangle() |
| 0 | 808 { |
|
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809 OutBuffer buf = new OutBuffer(); |
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810 string id; |
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811 |
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812 static if (0) { |
|
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813 printf("TemplateInstance.mangle() %s", toChars()); |
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814 if (parent) |
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815 printf(" parent = %s %s", parent.kind(), parent.toChars()); |
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816 printf("\n"); |
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817 } |
|
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818 id = ident ? ident.toChars() : toChars(); |
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819 if (!tempdecl) |
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820 error("is not defined"); |
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821 else if (tempdecl.parent) |
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822 { |
|
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823 string p = tempdecl.parent.mangle(); |
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824 if (p[0] == '_' && p[1] == 'D') |
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825 p = p[2..$]; |
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826 buf.writestring(p); |
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827 } |
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|
828 buf.printf("%d%s", id.length, id); |
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829 id = buf.toChars(); |
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|
830 buf.data = null; |
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831 //printf("TemplateInstance.mangle() %s = %s\n", toChars(), id); |
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832 return id; |
| 0 | 833 } |
| 834 | |
| 835 void printInstantiationTrace() | |
| 836 { | |
|
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837 if (global.gag) |
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838 return; |
| 0 | 839 } |
| 840 | |
| 72 | 841 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 842 { |
| 843 version (LOG) { | |
| 844 printf("TemplateInstance.toObjFile('%s', this = %p)\n", toChars(), this); | |
| 845 } | |
| 846 if (!errors && members) | |
| 847 { | |
| 848 if (multiobj) | |
| 849 // Append to list of object files to be written later | |
| 850 obj_append(this); | |
| 851 else | |
| 852 { | |
|
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853 foreach(Dsymbol s; members) |
| 0 | 854 s.toObjFile(multiobj); |
| 855 } | |
| 856 } | |
| 857 } | |
| 858 | |
| 859 // Internal | |
| 860 /********************************** | |
| 861 * Input: | |
| 862 * flags 1: replace const variables with their initializers | |
| 863 */ | |
| 864 static void semanticTiargs(Loc loc, Scope sc, Objects tiargs, int flags) | |
| 865 { | |
| 866 // Run semantic on each argument, place results in tiargs[] | |
| 867 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 868 if (!tiargs) | |
| 869 return; | |
| 870 for (size_t j = 0; j < tiargs.dim; j++) | |
| 871 { | |
|
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|
872 Object o = tiargs[j]; |
| 0 | 873 Type ta = isType(o); |
| 874 Expression ea = isExpression(o); | |
| 875 Dsymbol sa = isDsymbol(o); | |
| 876 | |
| 877 //printf("1: tiargs.data[%d] = %p, %p, %p, ea=%p, ta=%p\n", j, o, isDsymbol(o), isTuple(o), ea, ta); | |
| 878 if (ta) | |
| 879 { | |
| 880 //printf("type %s\n", ta.toChars()); | |
| 881 // It might really be an Expression or an Alias | |
| 882 ta.resolve(loc, sc, &ea, &ta, &sa); | |
| 883 if (ea) | |
| 884 { | |
| 885 ea = ea.semantic(sc); | |
| 886 /* This test is to skip substituting a const var with | |
| 887 * its initializer. The problem is the initializer won't | |
| 888 * match with an 'alias' parameter. Instead, do the | |
| 889 * const substitution in TemplateValueParameter.matchArg(). | |
| 890 */ | |
| 891 if (ea.op != TOKvar || flags & 1) | |
| 892 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 893 | |
|
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|
894 tiargs[j] = ea; |
| 0 | 895 } |
| 896 else if (sa) | |
| 897 { | |
|
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898 tiargs[j] = sa; |
| 0 | 899 TupleDeclaration d = sa.toAlias().isTupleDeclaration(); |
| 900 if (d) | |
| 901 { | |
| 902 size_t dim = d.objects.dim; | |
| 903 tiargs.remove(j); | |
| 904 tiargs.insert(j, d.objects); | |
| 905 j--; | |
| 906 } | |
| 907 } | |
| 908 else if (ta) | |
| 909 { | |
| 910 Ltype: | |
| 911 if (ta.ty == Ttuple) | |
| 912 { | |
| 913 // Expand tuple | |
|
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914 auto tt = cast(TypeTuple)ta; |
| 0 | 915 size_t dim = tt.arguments.dim; |
| 916 tiargs.remove(j); | |
| 917 if (dim) | |
| 918 { | |
| 919 tiargs.reserve(dim); | |
| 920 for (size_t i = 0; i < dim; i++) | |
| 921 { | |
|
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922 auto arg = tt.arguments[i]; |
|
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923 tiargs.insert(j + i, arg.type); |
| 0 | 924 } |
| 925 } | |
| 926 j--; | |
| 927 } | |
| 928 else | |
|
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929 tiargs[j] = ta; |
| 0 | 930 } |
| 931 else | |
| 932 { | |
| 933 assert(global.errors); | |
|
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934 tiargs[j] = Type.terror; |
| 0 | 935 } |
| 936 } | |
| 937 else if (ea) | |
| 938 { | |
| 939 if (!ea) | |
| 940 { | |
| 941 assert(global.errors); | |
| 942 ea = new IntegerExp(0); | |
| 943 } | |
| 944 assert(ea); | |
| 945 ea = ea.semantic(sc); | |
| 946 if (ea.op != TOKvar || flags & 1) | |
| 947 ea = ea.optimize(WANTvalue | WANTinterpret); | |
|
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|
948 tiargs[j] = ea; |
| 0 | 949 if (ea.op == TOKtype) |
| 950 { | |
| 951 ta = ea.type; | |
| 952 goto Ltype; | |
| 953 } | |
| 954 if (ea.op == TOKtuple) | |
| 955 { | |
| 956 // Expand tuple | |
|
90
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|
957 auto te = cast(TupleExp)ea; |
| 0 | 958 size_t dim = te.exps.dim; |
| 959 tiargs.remove(j); | |
| 960 if (dim) | |
| 961 { | |
| 962 tiargs.reserve(dim); | |
| 963 for (size_t i = 0; i < dim; i++) | |
|
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|
964 tiargs.insert(j + i, te.exps[i]); |
| 0 | 965 } |
| 966 j--; | |
| 967 } | |
| 968 } | |
| 969 else if (sa) | |
| 970 { | |
| 971 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 972 if (td && !td.semanticRun && td.literal) | |
| 973 td.semantic(sc); | |
| 974 } | |
| 975 else | |
| 976 { | |
| 977 assert(0); | |
| 978 } | |
| 979 //printf("1: tiargs.data[%d] = %p\n", j, tiargs.data[j]); | |
| 980 } | |
| 981 | |
| 982 static if (false) { | |
| 983 printf("-TemplateInstance.semanticTiargs('%s', this=%p)\n", toChars(), this); | |
| 984 for (size_t j = 0; j < tiargs.dim; j++) | |
| 985 { | |
| 986 Object o = cast(Object)tiargs.data[j]; | |
| 987 Type ta = isType(o); | |
| 988 Expression ea = isExpression(o); | |
| 989 Dsymbol sa = isDsymbol(o); | |
| 990 Tuple va = isTuple(o); | |
| 991 | |
| 992 printf("\ttiargs[%d] = ta %p, ea %p, sa %p, va %p\n", j, ta, ea, sa, va); | |
| 993 } | |
| 994 } | |
| 995 } | |
| 996 | |
| 997 void semanticTiargs(Scope sc) | |
| 998 { | |
| 999 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 1000 if (semantictiargsdone) | |
| 1001 return; | |
| 1002 | |
| 1003 semantictiargsdone = 1; | |
| 1004 semanticTiargs(loc, sc, tiargs, 0); | |
| 1005 } | |
| 1006 | |
| 1007 /********************************************** | |
| 1008 * Find template declaration corresponding to template instance. | |
| 1009 */ | |
| 1010 TemplateDeclaration findTemplateDeclaration(Scope sc) | |
| 1011 { | |
| 1012 //printf("TemplateInstance.findTemplateDeclaration() %s\n", toChars()); | |
| 1013 if (!tempdecl) | |
| 1014 { | |
| 1015 /* Given: | |
| 1016 * foo!( ... ) | |
| 1017 * figure out which TemplateDeclaration foo refers to. | |
| 1018 */ | |
| 1019 Dsymbol s; | |
| 1020 Dsymbol scopesym; | |
| 1021 int i; | |
| 1022 | |
| 1023 Identifier id = name; | |
| 1024 s = sc.search(loc, id, &scopesym); | |
| 1025 if (!s) | |
| 1026 { | |
| 1027 error("identifier '%s' is not defined", id.toChars()); | |
| 1028 return null; | |
| 1029 } | |
| 1030 version (LOG) { | |
| 1031 printf("It's an instance of '%s' kind '%s'\n", s.toChars(), s.kind()); | |
| 1032 if (s.parent) | |
| 1033 printf("s.parent = '%s'\n", s.parent.toChars()); | |
| 1034 } | |
| 1035 withsym = scopesym.isWithScopeSymbol(); | |
| 1036 | |
| 1037 /* We might have found an alias within a template when | |
| 1038 * we really want the template. | |
| 1039 */ | |
| 1040 TemplateInstance ti; | |
| 1041 if (s.parent && | |
| 1042 (ti = s.parent.isTemplateInstance()) !is null) | |
| 1043 { | |
| 1044 if ( | |
| 1045 (ti.name == id || | |
| 1046 ti.toAlias().ident == id) | |
| 1047 && | |
| 1048 ti.tempdecl | |
| 1049 ) | |
| 1050 { | |
| 1051 /* This is so that one can refer to the enclosing | |
| 1052 * template, even if it has the same name as a member | |
| 1053 * of the template, if it has a !(arguments) | |
| 1054 */ | |
| 1055 tempdecl = ti.tempdecl; | |
| 1056 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1057 tempdecl = tempdecl.overroot; // then get the start | |
| 1058 | |
| 1059 s = tempdecl; | |
| 1060 } | |
| 1061 } | |
| 1062 | |
| 1063 s = s.toAlias(); | |
| 1064 | |
| 1065 /* It should be a TemplateDeclaration, not some other symbol | |
| 1066 */ | |
| 1067 tempdecl = s.isTemplateDeclaration(); | |
| 1068 if (!tempdecl) | |
| 1069 { | |
| 1070 if (!s.parent && global.errors) | |
| 1071 return null; | |
| 1072 if (!s.parent && s.getType()) | |
| 1073 { | |
| 1074 Dsymbol s2 = s.getType().toDsymbol(sc); | |
| 1075 if (!s2) | |
| 1076 { | |
| 1077 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1078 return null; | |
| 1079 } | |
| 1080 s = s2; | |
| 1081 } | |
| 1082 debug { | |
| 1083 //if (!s.parent) printf("s = %s %s\n", s.kind(), s.toChars()); | |
| 1084 } | |
| 1085 //assert(s.parent); | |
| 1086 TemplateInstance ti2 = s.parent ? s.parent.isTemplateInstance() : null; | |
| 1087 if (ti2 && | |
| 1088 (ti2.name == id || | |
| 1089 ti2.toAlias().ident == id) | |
| 1090 && | |
| 1091 ti2.tempdecl | |
| 1092 ) | |
| 1093 { | |
| 1094 /* This is so that one can refer to the enclosing | |
| 1095 * template, even if it has the same name as a member | |
| 1096 * of the template, if it has a !(arguments) | |
| 1097 */ | |
| 1098 tempdecl = ti2.tempdecl; | |
| 1099 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1100 tempdecl = tempdecl.overroot; // then get the start | |
| 1101 } | |
| 1102 else | |
| 1103 { | |
| 1104 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1105 return null; | |
| 1106 } | |
| 1107 } | |
| 1108 } | |
| 1109 else | |
| 1110 assert(tempdecl.isTemplateDeclaration()); | |
| 1111 | |
| 1112 return tempdecl; | |
| 1113 } | |
| 1114 | |
| 1115 TemplateDeclaration findBestMatch(Scope sc) | |
| 1116 { | |
| 1117 /* Since there can be multiple TemplateDeclaration's with the same | |
| 1118 * name, look for the best match. | |
| 1119 */ | |
| 1120 TemplateDeclaration td_ambig = null; | |
| 1121 TemplateDeclaration td_best = null; | |
| 1122 MATCH m_best = MATCHnomatch; | |
| 1123 scope Objects dedtypes = new Objects(); | |
| 1124 | |
| 1125 version (LOG) { | |
| 1126 printf("TemplateInstance.findBestMatch()\n"); | |
| 1127 } | |
| 1128 // First look for forward references | |
| 1129 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1130 { | |
| 1131 if (!td.semanticRun) | |
| 1132 { | |
| 1133 if (td.scope_) | |
| 1134 { | |
| 1135 // Try to fix forward reference | |
| 1136 td.semantic(td.scope_); | |
| 1137 } | |
| 1138 if (!td.semanticRun) | |
| 1139 { | |
| 1140 error("%s forward references template declaration %s\n", toChars(), td.toChars()); | |
| 1141 return null; | |
| 1142 } | |
| 1143 } | |
| 1144 } | |
| 1145 | |
| 1146 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1147 { | |
| 1148 MATCH m; | |
| 1149 | |
| 1150 //if (tiargs.dim) printf("2: tiargs.dim = %d, data[0] = %p\n", tiargs.dim, tiargs.data[0]); | |
| 1151 | |
| 1152 // If more arguments than parameters, | |
| 1153 // then this is no match. | |
| 1154 if (td.parameters.dim < tiargs.dim) | |
| 1155 { | |
| 1156 if (!td.isVariadic()) | |
| 1157 continue; | |
| 1158 } | |
| 1159 | |
| 1160 dedtypes.setDim(td.parameters.dim); | |
| 1161 dedtypes.zero(); | |
| 1162 assert(td.semanticRun); | |
| 1163 m = td.matchWithInstance(this, dedtypes, 0); | |
| 1164 //printf("matchWithInstance = %d\n", m); | |
| 1165 if (!m) // no match at all | |
| 1166 continue; | |
| 1167 | |
| 1168 if (m < m_best) | |
| 1169 goto Ltd_best; | |
| 1170 if (m > m_best) | |
| 1171 goto Ltd; | |
| 1172 | |
| 1173 { | |
| 1174 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1175 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1176 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1177 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1178 | |
| 1179 if (c1 > c2) | |
| 1180 goto Ltd; | |
| 1181 else if (c1 < c2) | |
| 1182 goto Ltd_best; | |
| 1183 else | |
| 1184 goto Lambig; | |
| 1185 } | |
| 1186 | |
| 1187 Lambig: // td_best and td are ambiguous | |
| 1188 td_ambig = td; | |
| 1189 continue; | |
| 1190 | |
| 1191 Ltd_best: // td_best is the best match so far | |
| 1192 td_ambig = null; | |
| 1193 continue; | |
| 1194 | |
| 1195 Ltd: // td is the new best match | |
| 1196 td_ambig = null; | |
| 1197 td_best = td; | |
| 1198 m_best = m; | |
| 1199 tdtypes.setDim(dedtypes.dim); | |
|
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diff
changeset
|
1200 memcpy(tdtypes.ptr, dedtypes.ptr, tdtypes.dim * (void*).sizeof); |
| 0 | 1201 continue; |
| 1202 } | |
| 1203 | |
| 1204 if (!td_best) | |
| 1205 { | |
| 1206 if (tempdecl && !tempdecl.overnext) | |
| 1207 // Only one template, so we can give better error message | |
| 1208 error("%s does not match template declaration %s", toChars(), tempdecl.toChars()); | |
| 1209 else | |
| 1210 error("%s does not match any template declaration", toChars()); | |
| 1211 return null; | |
| 1212 } | |
| 1213 | |
| 1214 if (td_ambig) | |
| 1215 { | |
| 1216 error("%s matches more than one template declaration, %s and %s", | |
| 1217 toChars(), td_best.toChars(), td_ambig.toChars()); | |
| 1218 } | |
| 1219 | |
| 1220 /* The best match is td_best | |
| 1221 */ | |
| 1222 tempdecl = td_best; | |
| 1223 | |
| 1224 static if (false) { | |
| 1225 /* Cast any value arguments to be same type as value parameter | |
| 1226 */ | |
| 1227 for (size_t i = 0; i < tiargs.dim; i++) | |
| 1228 { | |
| 1229 Object o = cast(Object)tiargs.data[i]; | |
| 1230 Expression ea = isExpression(o); // value argument | |
| 1231 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1232 assert(tp); | |
| 1233 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1234 if (tvp) | |
| 1235 { | |
| 1236 assert(ea); | |
| 1237 ea = ea.castTo(tvp.valType); | |
| 1238 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1239 tiargs.data[i] = cast(Object)ea; | |
| 1240 } | |
| 1241 } | |
| 1242 } | |
| 1243 | |
| 1244 version (LOG) { | |
| 1245 printf("\tIt's a match with template declaration '%s'\n", tempdecl.toChars()); | |
| 1246 } | |
| 1247 return tempdecl; | |
| 1248 } | |
| 1249 | |
| 1250 /**************************************************** | |
| 1251 * Declare parameters of template instance, initialize them with the | |
| 1252 * template instance arguments. | |
| 1253 */ | |
| 1254 void declareParameters(Scope sc) | |
| 1255 { | |
|
20
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diff
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|
1256 //printf("TemplateInstance.declareParameters()\n"); |
| 0 | 1257 for (int i = 0; i < tdtypes.dim; i++) |
| 1258 { | |
|
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TemplateParameters -> Vector
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diff
changeset
|
1259 auto tp = tempdecl.parameters[i]; |
| 0 | 1260 //Object o = cast(Object)tiargs.data[i]; |
|
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|
1261 Object o = tdtypes[i]; // initializer for tp |
| 0 | 1262 |
| 1263 //printf("\ttdtypes[%d] = %p\n", i, o); | |
| 1264 tempdecl.declareParameter(sc, tp, o); | |
| 1265 } | |
| 1266 } | |
| 1267 | |
| 1268 /***************************************** | |
| 1269 * Determines if a TemplateInstance will need a nested | |
| 1270 * generation of the TemplateDeclaration. | |
| 1271 */ | |
| 1272 bool hasNestedArgs(Objects args) | |
| 1273 { | |
| 1274 bool nested = false; | |
|
20
1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1275 //printf("TemplateInstance.hasNestedArgs('%s')\n", tempdecl.ident.toChars()); |
| 0 | 1276 |
| 1277 /* A nested instance happens when an argument references a local | |
| 1278 * symbol that is on the stack. | |
| 1279 */ | |
| 1280 for (size_t i = 0; i < args.dim; i++) | |
| 1281 { | |
|
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More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
1282 Object o = args[i]; |
| 0 | 1283 Expression ea = isExpression(o); |
| 1284 Dsymbol sa = isDsymbol(o); | |
| 1285 Tuple va = isTuple(o); | |
| 1286 if (ea) | |
| 1287 { | |
| 1288 if (ea.op == TOKvar) | |
| 1289 { | |
| 1290 sa = (cast(VarExp)ea).var; | |
| 1291 goto Lsa; | |
| 1292 } | |
| 1293 if (ea.op == TOKfunction) | |
| 1294 { | |
| 1295 sa = (cast(FuncExp)ea).fd; | |
| 1296 goto Lsa; | |
| 1297 } | |
| 1298 } | |
| 1299 else if (sa) | |
| 1300 { | |
| 1301 Lsa: | |
| 1302 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 96 | 1303 Declaration d = sa.isDeclaration(); |
| 1304 if ((td && td.literal) || | |
| 1305 (d && !d.isDataseg() && | |
| 1306 | |
| 1307 /// version (DMDV2) { // TODO: | |
| 0 | 1308 !(d.storage_class & STCmanifest) && |
| 1309 /// } | |
| 1310 (!d.isFuncDeclaration() || d.isFuncDeclaration().isNested()) && | |
| 96 | 1311 !isTemplateMixin() |
| 1312 )) | |
| 0 | 1313 { |
| 1314 // if module level template | |
| 1315 if (tempdecl.toParent().isModule()) | |
| 1316 { | |
| 1317 Dsymbol dparent = sa.toParent(); | |
| 1318 if (!isnested) | |
| 1319 isnested = dparent; | |
| 1320 else if (isnested != dparent) | |
| 1321 { | |
| 1322 /* Select the more deeply nested of the two. | |
| 1323 * Error if one is not nested inside the other. | |
| 1324 */ | |
| 1325 for (Dsymbol p = isnested; p; p = p.parent) | |
| 1326 { | |
| 1327 if (p == dparent) | |
| 1328 goto L1; // isnested is most nested | |
| 1329 } | |
| 1330 for (Dsymbol p = dparent; p; p = p.parent) | |
| 1331 { | |
| 1332 if (p == isnested) | |
| 1333 { | |
| 1334 isnested = dparent; | |
| 1335 goto L1; // dparent is most nested | |
| 1336 } | |
| 1337 } | |
| 1338 error("%s is nested in both %s and %s", | |
| 1339 toChars(), isnested.toChars(), dparent.toChars()); | |
| 1340 } | |
| 1341 L1: | |
| 1342 //printf("\tnested inside %s\n", isnested.toChars()); | |
| 1343 nested |= 1; | |
| 1344 } | |
| 1345 else | |
| 1346 error("cannot use local '%s' as parameter to non-global template %s", d.toChars(), tempdecl.toChars()); | |
| 1347 } | |
| 1348 } | |
| 1349 else if (va) | |
| 1350 { | |
| 1351 nested |= hasNestedArgs(va.objects); | |
| 1352 } | |
| 1353 } | |
| 1354 return nested; | |
| 1355 } | |
| 1356 | |
| 1357 /**************************************** | |
| 1358 * This instance needs an identifier for name mangling purposes. | |
| 1359 * Create one by taking the template declaration name and adding | |
| 1360 * the type signature for it. | |
| 1361 */ | |
| 1362 Identifier genIdent() | |
| 1363 { | |
| 1364 scope OutBuffer buf = new OutBuffer(); | |
| 1365 | |
|
20
1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1366 //printf("TemplateInstance.genIdent('%s')\n", tempdecl.ident.toChars()); |
| 96 | 1367 string id = tempdecl.ident.toChars(); |
| 0 | 1368 buf.printf("__T%d%s", id.length, id); ///! |
| 96 | 1369 Objects args = tiargs; |
| 0 | 1370 for (int i = 0; i < args.dim; i++) |
| 1371 { | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
110
diff
changeset
|
1372 Object o = args[i]; |
| 0 | 1373 Type ta = isType(o); |
| 1374 Expression ea = isExpression(o); | |
| 1375 Dsymbol sa = isDsymbol(o); | |
| 1376 Tuple va = isTuple(o); | |
| 1377 //printf("\to [%d] %p ta %p ea %p sa %p va %p\n", i, o, ta, ea, sa, va); | |
| 1378 if (ta) | |
| 1379 { | |
| 1380 buf.writeByte('T'); | |
| 1381 if (ta.deco) | |
| 1382 buf.writestring(ta.deco); | |
| 1383 else | |
| 1384 { | |
| 1385 debug writef("ta = %d, %s\n", ta.ty, ta.toChars()); | |
| 1386 assert(global.errors); | |
| 1387 } | |
| 1388 } | |
| 1389 else if (ea) | |
| 1390 { | |
| 1391 Lea: | |
| 1392 long v; | |
| 1393 real r; | |
| 1394 | |
| 1395 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1396 if (ea.op == TOKvar) | |
| 1397 { | |
| 1398 sa = (cast(VarExp)ea).var; | |
| 1399 ea = null; | |
| 1400 goto Lsa; | |
| 1401 } | |
| 1402 if (ea.op == TOKfunction) | |
| 1403 { | |
| 1404 sa = (cast(FuncExp)ea).fd; | |
| 1405 ea = null; | |
| 1406 goto Lsa; | |
| 1407 } | |
| 1408 buf.writeByte('V'); | |
| 1409 if (ea.op == TOKtuple) | |
| 1410 { | |
| 1411 ea.error("tuple is not a valid template value argument"); | |
| 1412 continue; | |
| 1413 } | |
| 1414 static if (true) { | |
| 1415 /* Use deco that matches what it would be for a function parameter | |
| 1416 */ | |
| 1417 buf.writestring(ea.type.deco); | |
| 1418 } else { | |
| 1419 // Use type of parameter, not type of argument | |
| 1420 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1421 assert(tp); | |
| 1422 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1423 assert(tvp); | |
| 1424 buf.writestring(tvp.valType.deco); | |
| 1425 } | |
| 1426 ea.toMangleBuffer(buf); | |
| 1427 } | |
| 1428 else if (sa) | |
| 1429 { | |
| 1430 Lsa: | |
| 1431 buf.writeByte('S'); | |
| 1432 Declaration d = sa.isDeclaration(); | |
| 1433 if (d && (!d.type || !d.type.deco)) | |
| 1434 { | |
| 1435 error("forward reference of %s", d.toChars()); | |
| 1436 continue; | |
| 1437 } | |
| 1438 static if (false) { | |
| 1439 VarDeclaration v = sa.isVarDeclaration(); | |
| 1440 if (v && v.storage_class & STCmanifest) | |
| 1441 { | |
| 1442 ExpInitializer ei = v.init.isExpInitializer(); | |
| 1443 if (ei) | |
| 1444 { | |
| 1445 ea = ei.exp; | |
| 1446 goto Lea; | |
| 1447 } | |
| 1448 } | |
| 1449 } | |
| 1450 string p = sa.mangle(); | |
| 62 | 1451 ///buf.printf("%zu%s", p.length, p); |
| 1452 buf.printf("%su%s", p.length, p); | |
| 0 | 1453 } |
| 1454 else if (va) | |
| 1455 { | |
| 1456 assert(i + 1 == args.dim); // must be last one | |
| 1457 args = va.objects; | |
| 1458 i = -1; | |
| 1459 } | |
| 1460 else | |
| 1461 assert(0); | |
| 1462 } | |
| 1463 buf.writeByte('Z'); | |
| 1464 id = buf.toChars(); | |
| 1465 buf.data = null; | |
| 1466 //printf("\tgenIdent = %s\n", id); | |
| 1467 return new Identifier(id, TOKidentifier); | |
| 1468 } | |
| 1469 | |
| 72 | 1470 override TemplateInstance isTemplateInstance() { return this; } |
| 0 | 1471 |
| 72 | 1472 override AliasDeclaration isAliasDeclaration() |
| 0 | 1473 { |
| 1474 assert(false); | |
| 1475 } | |
|
20
1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1476 } |