Mercurial > projects > ddmd
annotate dmd/TemplateInstance.d @ 130:60bb0fe4563e
dmdfe 2.037 first main iteration
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Thu, 09 Sep 2010 22:51:44 +0100 |
| parents | e6e542f37b94 |
| children | 206db751bd4c |
| 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.templates.Util; |
| 0 | 41 |
| 42 import dmd.backend.glue; | |
| 43 | |
| 44 Tuple isTuple(Object o) | |
| 45 { | |
| 46 //return dynamic_cast<Tuple *>(o); | |
| 47 ///if (!o || o.dyncast() != DYNCAST_TUPLE) | |
| 48 /// return null; | |
| 49 return cast(Tuple)o; | |
| 50 } | |
| 51 | |
| 52 /****************************** | |
| 53 * If o1 matches o2, return 1. | |
| 54 * Else, return 0. | |
| 55 */ | |
| 56 | |
| 57 bool match(Object o1, Object o2, TemplateDeclaration tempdecl, Scope sc) | |
| 58 { | |
| 59 Type t1 = isType(o1); | |
| 60 Type t2 = isType(o2); | |
| 61 Expression e1 = isExpression(o1); | |
| 62 Expression e2 = isExpression(o2); | |
| 63 Dsymbol s1 = isDsymbol(o1); | |
| 64 Dsymbol s2 = isDsymbol(o2); | |
| 65 Tuple v1 = isTuple(o1); | |
| 66 Tuple v2 = isTuple(o2); | |
| 67 | |
| 68 //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); | |
| 69 | |
| 70 /* A proper implementation of the various equals() overrides | |
| 71 * should make it possible to just do o1.equals(o2), but | |
| 72 * we'll do that another day. | |
| 73 */ | |
| 74 | |
| 75 if (t1) | |
| 76 { | |
| 77 /* if t1 is an instance of ti, then give error | |
| 78 * about recursive expansions. | |
| 79 */ | |
| 80 Dsymbol s = t1.toDsymbol(sc); | |
| 81 if (s && s.parent) | |
| 82 { | |
| 83 TemplateInstance ti1 = s.parent.isTemplateInstance(); | |
| 84 if (ti1 && ti1.tempdecl == tempdecl) | |
| 85 { | |
| 86 for (Scope sc1 = sc; sc1; sc1 = sc1.enclosing) | |
| 87 { | |
| 88 if (sc1.scopesym == ti1) | |
| 89 { | |
| 90 error("recursive template expansion for template argument %s", t1.toChars()); | |
| 91 return true; // fake a match | |
| 92 } | |
| 93 } | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 //printf("t1 = %s\n", t1.toChars()); | |
| 98 //printf("t2 = %s\n", t2.toChars()); | |
| 99 if (!t2 || !t1.equals(t2)) | |
| 100 goto Lnomatch; | |
| 101 } | |
| 102 else if (e1) | |
| 103 { | |
| 104 static if (false) { | |
| 105 if (e1 && e2) | |
| 106 { | |
| 107 printf("match %d\n", e1.equals(e2)); | |
| 108 e1.print(); | |
| 109 e2.print(); | |
| 110 e1.type.print(); | |
| 111 e2.type.print(); | |
| 112 } | |
| 113 } | |
| 114 if (!e2) | |
| 115 goto Lnomatch; | |
| 116 if (!e1.equals(e2)) | |
| 117 goto Lnomatch; | |
| 118 } | |
| 119 else if (s1) | |
| 120 { | |
| 121 //printf("%p %s, %p %s\n", s1, s1.toChars(), s2, s2.toChars()); | |
| 122 if (!s2 || !s1.equals(s2) || s1.parent != s2.parent) | |
| 123 { | |
| 124 goto Lnomatch; | |
| 125 } | |
| 126 version (DMDV2) { | |
| 127 VarDeclaration vv1 = s1.isVarDeclaration(); | |
| 128 VarDeclaration vv2 = s2.isVarDeclaration(); | |
| 129 if (vv1 && vv2 && vv1.storage_class & vv2.storage_class & STCmanifest) | |
| 130 { | |
| 131 ExpInitializer ei1 = vv1.init.isExpInitializer(); | |
| 132 ExpInitializer ei2 = vv2.init.isExpInitializer(); | |
| 133 if (ei1 && ei2 && !ei1.exp.equals(ei2.exp)) | |
| 134 goto Lnomatch; | |
| 135 } | |
| 136 } | |
| 137 } | |
| 138 else if (v1) | |
| 139 { | |
| 140 if (!v2) | |
| 141 goto Lnomatch; | |
| 142 | |
| 143 if (v1.objects.dim != v2.objects.dim) | |
| 144 goto Lnomatch; | |
| 145 | |
| 146 for (size_t i = 0; i < v1.objects.dim; i++) | |
| 147 { | |
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148 if (!match(v1.objects[i], v2.objects[i], tempdecl, sc)) |
| 0 | 149 goto Lnomatch; |
| 150 } | |
| 151 } | |
| 152 //printf("match\n"); | |
| 153 return true; // match | |
| 154 | |
| 155 Lnomatch: | |
| 156 //printf("nomatch\n"); | |
| 157 return false; // nomatch; | |
| 158 } | |
| 159 | |
| 160 class TemplateInstance : ScopeDsymbol | |
| 161 { | |
| 162 /* Given: | |
| 163 * foo!(args) => | |
| 164 * name = foo | |
| 165 * tiargs = args | |
| 166 */ | |
| 167 Identifier name; | |
| 168 //Array idents; | |
| 169 Objects tiargs; // Array of Types/Expressions of template | |
| 170 // instance arguments [int*, char, 10*10] | |
| 171 | |
| 172 Objects tdtypes; // Array of Types/Expressions corresponding | |
| 173 // to TemplateDeclaration.parameters | |
| 174 // [int, char, 100] | |
| 175 | |
| 176 TemplateDeclaration tempdecl; // referenced by foo.bar.abc | |
| 177 TemplateInstance inst; // refer to existing instance | |
| 178 TemplateInstance tinst; // enclosing template instance | |
| 179 ScopeDsymbol argsym; // argument symbol table | |
| 180 AliasDeclaration aliasdecl; // !=null if instance is an alias for its | |
| 181 // sole member | |
| 182 WithScopeSymbol withsym; // if a member of a with statement | |
| 183 int semanticRun; // has semantic() been done? | |
| 184 int semantictiargsdone; // has semanticTiargs() been done? | |
| 185 int nest; // for recursion detection | |
| 186 int havetempdecl; // 1 if used second constructor | |
| 187 Dsymbol isnested; // if referencing local symbols, this is the context | |
| 188 int errors; // 1 if compiled with errors | |
| 189 version (IN_GCC) { | |
| 190 /* On some targets, it is necessary to know whether a symbol | |
| 191 will be emitted in the output or not before the symbol | |
| 192 is used. This can be different from getModule(). */ | |
| 193 Module objFileModule; | |
| 194 } | |
| 195 | |
| 196 this(Loc loc, Identifier ident) | |
| 197 { | |
| 198 super(null); | |
| 199 | |
| 200 version (LOG) { | |
| 201 printf("TemplateInstance(this = %p, ident = '%s')\n", this, ident ? ident.toChars() : "null"); | |
| 202 } | |
| 203 this.loc = loc; | |
| 204 this.name = ident; | |
| 205 | |
| 206 tdtypes = new Objects(); | |
| 207 } | |
| 208 | |
| 209 /***************** | |
| 210 * This constructor is only called when we figured out which function | |
| 211 * template to instantiate. | |
| 212 */ | |
| 213 this(Loc loc, TemplateDeclaration td, Objects tiargs) | |
| 214 { | |
| 215 super(null); | |
| 216 | |
| 217 version (LOG) { | |
| 218 printf("TemplateInstance(this = %p, tempdecl = '%s')\n", this, td.toChars()); | |
| 219 } | |
| 220 this.loc = loc; | |
| 221 this.name = td.ident; | |
| 222 this.tiargs = tiargs; | |
| 223 this.tempdecl = td; | |
| 224 this.semantictiargsdone = 1; | |
| 225 this.havetempdecl = 1; | |
| 226 | |
| 227 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 228 | |
| 229 tdtypes = new Objects(); | |
| 230 } | |
| 231 | |
| 232 static Objects arraySyntaxCopy(Objects objs) | |
| 233 { | |
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234 Objects a = null; |
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235 if (objs) |
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236 { a = new Objects(); |
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237 a.setDim(objs.dim); |
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238 for (size_t i = 0; i < objs.dim; i++) |
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239 { |
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240 a[i] = objectSyntaxCopy(objs[i]); |
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241 } |
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242 } |
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243 return a; |
| 0 | 244 } |
| 245 | |
| 72 | 246 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 247 { |
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248 TemplateInstance ti; |
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249 |
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250 if (s) |
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251 ti = cast(TemplateInstance)s; |
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252 else |
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253 ti = new TemplateInstance(loc, name); |
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254 |
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255 ti.tiargs = arraySyntaxCopy(tiargs); |
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256 |
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257 ScopeDsymbol.syntaxCopy(ti); |
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258 return ti; |
| 0 | 259 } |
| 260 | |
| 72 | 261 override void semantic(Scope sc) |
| 0 | 262 { |
| 263 if (global.errors) | |
| 264 { | |
| 265 if (!global.gag) | |
| 266 { | |
| 267 /* Trying to soldier on rarely generates useful messages | |
| 268 * at this point. | |
| 269 */ | |
| 270 fatal(); | |
| 271 } | |
| 272 return; | |
| 273 } | |
| 274 | |
| 275 version (LOG) { | |
| 276 printf("\n+TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 277 } | |
| 278 | |
| 279 if (inst) // if semantic() was already run | |
| 280 { | |
| 281 version (LOG) { | |
| 282 printf("-TemplateInstance.semantic('%s', this=%p) already run\n", inst.toChars(), inst); | |
| 283 } | |
| 284 return; | |
| 285 } | |
| 286 | |
| 287 // get the enclosing template instance from the scope tinst | |
| 288 tinst = sc.tinst; | |
| 289 | |
| 290 if (semanticRun != 0) | |
| 291 { | |
| 292 error(loc, "recursive template expansion"); | |
| 293 // inst = this; | |
| 294 return; | |
| 295 } | |
| 296 | |
| 297 semanticRun = 1; | |
| 298 | |
| 299 version (LOG) { | |
| 300 printf("\tdo semantic\n"); | |
| 301 } | |
| 302 if (havetempdecl) | |
| 303 { | |
| 304 assert(cast(size_t)cast(void*)tempdecl.scope_ > 0x10000); | |
| 305 | |
| 306 // Deduce tdtypes | |
| 307 tdtypes.setDim(tempdecl.parameters.dim); | |
| 308 if (!tempdecl.matchWithInstance(this, tdtypes, 2)) | |
| 309 { | |
| 310 error("incompatible arguments for template instantiation"); | |
| 311 inst = this; | |
| 312 return; | |
| 313 } | |
| 314 } | |
| 315 else | |
| 316 { | |
| 317 /* Run semantic on each argument, place results in tiargs[] | |
| 318 * (if we havetempdecl, then tiargs is already evaluated) | |
| 319 */ | |
| 320 semanticTiargs(sc); | |
| 321 | |
| 322 tempdecl = findTemplateDeclaration(sc); | |
| 323 if (tempdecl) | |
| 324 tempdecl = findBestMatch(sc); | |
| 325 | |
| 326 if (!tempdecl || global.errors) | |
| 327 { | |
| 328 inst = this; | |
| 329 //printf("error return %p, %d\n", tempdecl, global.errors); | |
| 330 return; // error recovery | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 hasNestedArgs(tiargs); | |
| 335 | |
| 336 /* See if there is an existing TemplateInstantiation that already | |
| 337 * implements the typeargs. If so, just refer to that one instead. | |
| 338 */ | |
| 339 | |
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340 foreach (ti; tempdecl.instances) |
| 0 | 341 { |
| 342 version (LOG) { | |
| 343 printf("\t%s: checking for match with instance %d (%p): '%s'\n", toChars(), i, ti, ti.toChars()); | |
| 344 } | |
| 345 assert(tdtypes.dim == ti.tdtypes.dim); | |
| 346 | |
| 347 // Nesting must match | |
| 348 if (isnested !is ti.isnested) | |
| 349 { | |
| 350 //printf("test2 isnested %s ti.isnested %s\n", isnested ? isnested.toChars() : "", ti.isnested ? ti.isnested.toChars() : ""); | |
| 351 continue; | |
| 352 } | |
| 353 static if (false) { | |
| 354 if (isnested && sc.parent != ti.parent) | |
| 355 continue; | |
| 356 } | |
| 357 for (size_t j = 0; j < tdtypes.dim; j++) | |
| 358 { | |
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359 Object o1 = tdtypes[j]; |
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360 Object o2 = ti.tdtypes[j]; |
| 0 | 361 if (!match(o1, o2, tempdecl, sc)) |
| 362 { | |
| 363 goto L1; | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 // It's a match | |
| 368 inst = ti; | |
| 369 parent = ti.parent; | |
| 370 version (LOG) { | |
| 371 printf("\tit's a match with instance %p\n", inst); | |
| 372 } | |
| 373 return; | |
| 374 | |
| 375 L1: | |
| 376 ; | |
| 377 } | |
| 378 | |
| 379 /* So, we need to implement 'this' instance. | |
| 380 */ | |
| 381 version (LOG) { | |
| 382 printf("\timplement template instance '%s'\n", toChars()); | |
| 383 } | |
| 384 uint errorsave = global.errors; | |
| 385 inst = this; | |
| 386 int tempdecl_instance_idx = tempdecl.instances.dim; | |
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387 tempdecl.instances.push(this); |
| 0 | 388 parent = tempdecl.parent; |
| 389 //printf("parent = '%s'\n", parent.kind()); | |
| 390 | |
| 391 ident = genIdent(); // need an identifier for name mangling purposes. | |
| 392 | |
| 393 static if (true) { | |
| 394 if (isnested) | |
| 395 parent = isnested; | |
| 396 } | |
| 397 //printf("parent = '%s'\n", parent.kind()); | |
| 398 | |
| 399 // Add 'this' to the enclosing scope's members[] so the semantic routines | |
| 400 // will get called on the instance members | |
| 401 static if (true) { | |
| 402 int dosemantic3 = 0; | |
| 403 { | |
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404 Dsymbols a; |
| 0 | 405 |
| 406 Scope scx = sc; | |
| 407 static if (false) { | |
| 408 for (scx = sc; scx; scx = scx.enclosing) | |
| 409 if (scx.scopesym) | |
| 410 break; | |
| 411 } | |
| 412 | |
| 413 //if (scx && scx.scopesym) printf("3: scx is %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 414 if (scx && scx.scopesym && | |
| 415 scx.scopesym.members && !scx.scopesym.isTemplateMixin() | |
| 416 | |
| 417 /// static if (false) { // removed because it bloated compile times | |
| 418 /// /* The problem is if A imports B, and B imports A, and both A | |
| 419 /// * and B instantiate the same template, does the compilation of A | |
| 420 /// * or the compilation of B do the actual instantiation? | |
| 421 /// * | |
| 422 /// * see bugzilla 2500. | |
| 423 /// */ | |
| 424 /// && !scx.module.selfImports() | |
| 425 /// } | |
| 426 ) | |
| 427 { | |
| 428 //printf("\t1: adding to %s %s\n", scx.scopesym.kind(), scx.scopesym.toChars()); | |
| 429 a = scx.scopesym.members; | |
| 430 } | |
| 431 else | |
| 432 { Module m = sc.module_.importedFrom; | |
| 433 //printf("\t2: adding to module %s instead of module %s\n", m.toChars(), sc.module.toChars()); | |
| 434 a = m.members; | |
| 435 if (m.semanticRun >= 3) | |
| 436 dosemantic3 = 1; | |
| 437 } | |
| 438 | |
| 439 for (int i = 0; 1; i++) | |
| 440 { | |
| 441 if (i == a.dim) | |
| 442 { | |
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443 a.push(this); |
| 0 | 444 break; |
| 445 } | |
| 446 | |
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447 if (this is a[i]) // if already in Array |
| 0 | 448 break; |
| 449 } | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 // Copy the syntax trees from the TemplateDeclaration | |
| 454 members = Dsymbol.arraySyntaxCopy(tempdecl.members); | |
| 455 | |
| 456 // Create our own scope for the template parameters | |
| 457 Scope scope_ = tempdecl.scope_; | |
| 458 if (!tempdecl.semanticRun) | |
| 459 { | |
| 460 error("template instantiation %s forward references template declaration %s\n", toChars(), tempdecl.toChars()); | |
| 461 return; | |
| 462 } | |
| 463 | |
| 464 version (LOG) { | |
| 465 printf("\tcreate scope for template parameters '%s'\n", toChars()); | |
| 466 } | |
| 467 argsym = new ScopeDsymbol(); | |
| 468 argsym.parent = scope_.parent; | |
| 469 scope_ = scope_.push(argsym); | |
| 470 // scope.stc = 0; | |
| 471 | |
| 472 // Declare each template parameter as an alias for the argument type | |
| 473 Scope paramscope = scope_.push(); | |
| 474 paramscope.stc = STCundefined; | |
| 475 declareParameters(paramscope); | |
| 476 paramscope.pop(); | |
| 477 | |
| 478 // Add members of template instance to template instance symbol table | |
| 479 // parent = scope.scopesym; | |
| 480 symtab = new DsymbolTable(); | |
| 13 | 481 bool memnum = false; |
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482 foreach(Dsymbol s; members) |
| 0 | 483 { |
| 484 version (LOG) { | |
| 485 printf("\t[%d] adding member '%s' %p kind %s to '%s', memnum = %d\n", i, s.toChars(), s, s.kind(), this.toChars(), memnum); | |
| 486 } | |
| 487 memnum |= s.addMember(scope_, this, memnum); | |
| 488 } | |
| 489 | |
| 490 version (LOG) { | |
| 491 printf("adding members done\n"); | |
| 492 } | |
| 493 | |
| 494 /* See if there is only one member of template instance, and that | |
| 495 * member has the same name as the template instance. | |
| 496 * If so, this template instance becomes an alias for that member. | |
| 497 */ | |
| 498 //printf("members.dim = %d\n", members.dim); | |
| 499 if (members.dim) | |
| 500 { | |
| 501 Dsymbol s; | |
| 502 if (Dsymbol.oneMembers(members, &s) && s) | |
| 503 { | |
| 504 //printf("s.kind = '%s'\n", s.kind()); | |
| 505 //s.print(); | |
| 506 //printf("'%s', '%s'\n", s.ident.toChars(), tempdecl.ident.toChars()); | |
| 507 if (s.ident && s.ident.equals(tempdecl.ident)) | |
| 508 { | |
| 509 //printf("setting aliasdecl\n"); | |
| 510 aliasdecl = new AliasDeclaration(loc, s.ident, s); | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 // Do semantic() analysis on template instance members | |
| 516 version (LOG) { | |
| 517 printf("\tdo semantic() on template instance members '%s'\n", toChars()); | |
| 518 } | |
| 519 Scope sc2; | |
| 520 sc2 = scope_.push(this); | |
| 521 //printf("isnested = %d, sc.parent = %s\n", isnested, sc.parent.toChars()); | |
| 522 sc2.parent = /*isnested ? sc.parent :*/ this; | |
| 523 sc2.tinst = this; | |
| 524 | |
| 525 try | |
| 526 { | |
| 79 | 527 // static int nest; |
| 0 | 528 //printf("%d\n", nest); |
| 529 if (++nest > 500) | |
| 530 { | |
| 531 global.gag = 0; // ensure error message gets printed | |
| 532 error("recursive expansion"); | |
| 533 fatal(); | |
| 534 } | |
|
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535 foreach(Dsymbol s; members) |
| 0 | 536 { |
| 537 //printf("\t[%d] semantic on '%s' %p kind %s in '%s'\n", i, s.toChars(), s, s.kind(), this.toChars()); | |
| 538 //printf("test: isnested = %d, sc2.parent = %s\n", isnested, sc2.parent.toChars()); | |
| 539 // if (isnested) | |
| 540 // s.parent = sc.parent; | |
| 541 //printf("test3: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 542 s.semantic(sc2); | |
| 543 //printf("test4: isnested = %d, s.parent = %s\n", isnested, s.parent.toChars()); | |
| 544 sc2.module_.runDeferredSemantic(); | |
| 545 } | |
| 546 --nest; | |
| 547 } | |
|
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548 catch (Exception e) |
| 0 | 549 { |
| 550 global.gag = 0; // ensure error message gets printed | |
| 551 error("recursive expansion"); | |
| 552 fatal(); | |
| 553 } | |
| 554 | |
| 555 /* If any of the instantiation members didn't get semantic() run | |
| 556 * on them due to forward references, we cannot run semantic2() | |
| 557 * or semantic3() yet. | |
| 558 */ | |
| 559 for (size_t i = 0; i < Module.deferred.dim; i++) | |
| 560 { | |
| 561 Dsymbol sd = cast(Dsymbol)Module.deferred.data[i]; | |
| 562 | |
| 563 if (sd.parent is this) | |
| 564 goto Laftersemantic; | |
| 565 } | |
| 566 | |
| 567 /* The problem is when to parse the initializer for a variable. | |
| 568 * Perhaps VarDeclaration.semantic() should do it like it does | |
| 569 * for initializers inside a function. | |
| 570 */ | |
| 571 // if (sc.parent.isFuncDeclaration()) | |
| 572 | |
| 573 /* BUG 782: this has problems if the classes this depends on | |
| 574 * are forward referenced. Find a way to defer semantic() | |
| 575 * on this template. | |
| 576 */ | |
| 577 semantic2(sc2); | |
| 578 | |
| 579 if (sc.func || dosemantic3) | |
| 580 { | |
| 79 | 581 try |
| 582 { | |
| 583 // static int nest; // TODO: | |
| 584 if (++nest > 300) | |
| 585 { | |
| 586 global.gag = 0; // ensure error message gets printed | |
| 587 error("recursive expansion"); | |
| 588 fatal(); | |
| 589 } | |
| 590 semantic3(sc2); | |
| 591 --nest; | |
| 592 } | |
| 593 catch (Exception e) | |
| 594 { | |
| 595 global.gag = 0; // ensure error message gets printed | |
| 596 error("recursive expansion"); | |
| 597 fatal(); | |
| 598 } | |
| 0 | 599 } |
| 600 | |
| 601 Laftersemantic: | |
| 602 sc2.pop(); | |
| 603 | |
| 604 scope_.pop(); | |
| 605 | |
| 606 // Give additional context info if error occurred during instantiation | |
| 607 if (global.errors != errorsave) | |
| 608 { | |
| 609 error("error instantiating"); | |
| 610 if (tinst && !global.gag) | |
| 611 { | |
| 612 tinst.printInstantiationTrace(); | |
| 613 fatal(); | |
| 614 } | |
| 615 errors = 1; | |
| 616 if (global.gag) | |
| 617 tempdecl.instances.remove(tempdecl_instance_idx); | |
| 618 } | |
| 619 | |
| 620 version (LOG) { | |
| 621 printf("-TemplateInstance.semantic('%s', this=%p)\n", toChars(), this); | |
| 622 } | |
| 623 } | |
| 624 | |
| 72 | 625 override void semantic2(Scope sc) |
| 0 | 626 { |
| 627 if (semanticRun >= 2) | |
| 628 return; | |
| 629 | |
| 630 semanticRun = 2; | |
| 631 version (LOG) { | |
|
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632 printf("+TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 633 } |
| 634 | |
| 635 if (!errors && members) | |
| 636 { | |
| 637 sc = tempdecl.scope_; | |
| 638 assert(sc); | |
| 639 sc = sc.push(argsym); | |
| 640 sc = sc.push(this); | |
| 641 sc.tinst = this; | |
| 642 | |
|
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643 foreach(Dsymbol s; members) |
| 0 | 644 { |
| 645 version (LOG) { | |
| 646 printf("\tmember '%s', kind = '%s'\n", s.toChars(), s.kind()); | |
| 647 } | |
| 648 s.semantic2(sc); | |
| 649 } | |
| 650 | |
| 651 sc = sc.pop(); | |
| 652 sc.pop(); | |
| 653 } | |
| 654 | |
| 655 version (LOG) { | |
|
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656 printf("-TemplateInstance.semantic2('%s')\n", toChars()); |
| 0 | 657 } |
| 658 } | |
| 659 | |
| 72 | 660 override void semantic3(Scope sc) |
| 0 | 661 { |
| 662 version (LOG) { | |
| 663 printf("TemplateInstance.semantic3('%s'), semanticRun = %d\n", toChars(), semanticRun); | |
| 664 } | |
| 665 //if (toChars()[0] == 'D') *(char*)0=0; | |
| 666 if (semanticRun >= 3) | |
| 667 return; | |
| 668 semanticRun = 3; | |
| 669 if (!errors && members) | |
| 670 { | |
| 671 sc = tempdecl.scope_; | |
| 672 sc = sc.push(argsym); | |
| 673 sc = sc.push(this); | |
| 674 sc.tinst = this; | |
|
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675 foreach(Dsymbol s; members) |
| 0 | 676 s.semantic3(sc); |
| 677 sc = sc.pop(); | |
| 678 sc.pop(); | |
| 679 } | |
| 680 } | |
| 681 | |
| 72 | 682 override void inlineScan() |
| 0 | 683 { |
| 684 version (LOG) { | |
| 685 printf("TemplateInstance.inlineScan('%s')\n", toChars()); | |
| 686 } | |
| 687 if (!errors && members) | |
| 688 { | |
|
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689 foreach(Dsymbol s; members) |
| 0 | 690 s.inlineScan(); |
| 691 } | |
| 692 } | |
| 693 | |
| 72 | 694 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 695 { |
| 696 int i; | |
| 697 | |
| 698 Identifier id = name; | |
| 699 buf.writestring(id.toChars()); | |
| 700 buf.writestring("!("); | |
| 701 if (nest) | |
| 702 buf.writestring("..."); | |
| 703 else | |
| 704 { | |
| 705 nest++; | |
| 706 Objects args = tiargs; | |
| 707 for (i = 0; i < args.dim; i++) | |
| 708 { | |
| 709 if (i) | |
| 710 buf.writeByte(','); | |
|
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711 Object oarg = args[i]; |
| 0 | 712 ObjectToCBuffer(buf, hgs, oarg); |
| 713 } | |
| 714 nest--; | |
| 715 } | |
| 716 buf.writeByte(')'); | |
| 717 } | |
| 718 | |
| 72 | 719 override Dsymbol toAlias() // resolve real symbol |
| 0 | 720 { |
| 79 | 721 version (LOG) |
| 722 { | |
| 723 writef("TemplateInstance.toAlias()\n"); | |
| 0 | 724 } |
| 725 if (!inst) | |
| 726 { | |
| 727 error("cannot resolve forward reference"); | |
| 79 | 728 errors = 1; |
| 0 | 729 return this; |
| 730 } | |
| 731 | |
| 732 if (inst !is this) | |
| 733 return inst.toAlias(); | |
| 734 | |
| 735 if (aliasdecl) | |
| 736 { | |
| 737 return aliasdecl.toAlias(); | |
| 738 } | |
| 739 | |
| 740 return inst; | |
| 741 } | |
| 742 | |
| 72 | 743 override string kind() |
| 0 | 744 { |
|
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745 return "template instance"; |
| 0 | 746 } |
| 747 | |
| 72 | 748 override bool oneMember(Dsymbol* ps) |
| 0 | 749 { |
|
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750 *ps = null; |
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751 return true; |
| 0 | 752 } |
|
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753 |
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754 /***************************************************** |
|
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755 * Determine if template instance is really a template function, |
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756 * and that template function needs to infer types from the function |
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757 * arguments. |
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758 */ |
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759 |
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760 bool needsTypeInference(Scope sc) |
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761 { |
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762 //printf("TemplateInstance::needsTypeInference() %s\n", toChars()); |
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763 if (!tempdecl) |
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764 tempdecl = findTemplateDeclaration(sc); |
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765 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) |
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766 { |
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767 /* If any of the overloaded template declarations need inference, |
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768 * then return TRUE |
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769 */ |
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|
770 FuncDeclaration fd; |
|
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771 if (!td.onemember || |
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772 (fd = td.onemember.toAlias().isFuncDeclaration()) == null || |
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773 fd.type.ty != TY.Tfunction) |
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774 { |
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775 /* Not a template function, therefore type inference is not possible. |
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776 */ |
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|
777 //printf("false\n"); |
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778 return false; |
|
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779 } |
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|
780 |
|
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781 /* Determine if the instance arguments, tiargs, are all that is necessary |
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782 * to instantiate the template. |
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|
783 */ |
|
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784 TemplateTupleParameter tp = td.isVariadic(); |
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785 //printf("tp = %p, td->parameters->dim = %d, tiargs->dim = %d\n", tp, td->parameters->dim, tiargs->dim); |
|
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786 TypeFunction fdtype = cast(TypeFunction)fd.type; |
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787 if (Parameter.dim(fdtype.parameters) && |
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788 (tp || tiargs.dim < td.parameters.dim)) |
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789 return true; |
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790 } |
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791 //printf("false\n"); |
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792 return false; |
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793 } |
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794 |
| 72 | 795 override string toChars() |
| 0 | 796 { |
| 797 scope OutBuffer buf = new OutBuffer(); | |
| 798 HdrGenState hgs; | |
| 799 | |
| 800 toCBuffer(buf, &hgs); | |
| 801 return buf.extractString(); | |
| 802 } | |
| 803 | |
| 72 | 804 override string mangle() |
| 0 | 805 { |
|
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806 OutBuffer buf = new OutBuffer(); |
|
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807 string id; |
|
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808 |
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809 static if (0) { |
|
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810 printf("TemplateInstance.mangle() %s", toChars()); |
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|
811 if (parent) |
|
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812 printf(" parent = %s %s", parent.kind(), parent.toChars()); |
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813 printf("\n"); |
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|
814 } |
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|
815 id = ident ? ident.toChars() : toChars(); |
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816 if (!tempdecl) |
|
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|
817 error("is not defined"); |
|
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818 else if (tempdecl.parent) |
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819 { |
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820 string p = tempdecl.parent.mangle(); |
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821 if (p[0] == '_' && p[1] == 'D') |
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822 p = p[2..$]; |
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823 buf.writestring(p); |
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824 } |
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825 buf.printf("%d%s", id.length, id); |
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826 id = buf.toChars(); |
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827 buf.data = null; |
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828 //printf("TemplateInstance.mangle() %s = %s\n", toChars(), id); |
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829 return id; |
| 0 | 830 } |
| 831 | |
| 832 void printInstantiationTrace() | |
| 833 { | |
|
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834 if (global.gag) |
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|
835 return; |
| 0 | 836 } |
| 837 | |
| 72 | 838 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 839 { |
| 840 version (LOG) { | |
| 841 printf("TemplateInstance.toObjFile('%s', this = %p)\n", toChars(), this); | |
| 842 } | |
| 843 if (!errors && members) | |
| 844 { | |
| 845 if (multiobj) | |
| 846 // Append to list of object files to be written later | |
| 847 obj_append(this); | |
| 848 else | |
| 849 { | |
|
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850 foreach(Dsymbol s; members) |
| 0 | 851 s.toObjFile(multiobj); |
| 852 } | |
| 853 } | |
| 854 } | |
| 855 | |
| 856 // Internal | |
| 857 /********************************** | |
| 858 * Input: | |
| 859 * flags 1: replace const variables with their initializers | |
| 860 */ | |
| 861 static void semanticTiargs(Loc loc, Scope sc, Objects tiargs, int flags) | |
| 862 { | |
| 863 // Run semantic on each argument, place results in tiargs[] | |
| 864 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 865 if (!tiargs) | |
| 866 return; | |
| 867 for (size_t j = 0; j < tiargs.dim; j++) | |
| 868 { | |
|
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869 Object o = tiargs[j]; |
| 0 | 870 Type ta = isType(o); |
| 871 Expression ea = isExpression(o); | |
| 872 Dsymbol sa = isDsymbol(o); | |
| 873 | |
| 874 //printf("1: tiargs.data[%d] = %p, %p, %p, ea=%p, ta=%p\n", j, o, isDsymbol(o), isTuple(o), ea, ta); | |
| 875 if (ta) | |
| 876 { | |
| 877 //printf("type %s\n", ta.toChars()); | |
| 878 // It might really be an Expression or an Alias | |
| 879 ta.resolve(loc, sc, &ea, &ta, &sa); | |
| 880 if (ea) | |
| 881 { | |
| 882 ea = ea.semantic(sc); | |
| 883 /* This test is to skip substituting a const var with | |
| 884 * its initializer. The problem is the initializer won't | |
| 885 * match with an 'alias' parameter. Instead, do the | |
| 886 * const substitution in TemplateValueParameter.matchArg(). | |
| 887 */ | |
| 888 if (ea.op != TOKvar || flags & 1) | |
| 889 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 890 | |
|
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891 tiargs[j] = ea; |
| 0 | 892 } |
| 893 else if (sa) | |
| 894 { | |
|
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895 tiargs[j] = sa; |
| 0 | 896 TupleDeclaration d = sa.toAlias().isTupleDeclaration(); |
| 897 if (d) | |
| 898 { | |
| 899 size_t dim = d.objects.dim; | |
| 900 tiargs.remove(j); | |
| 901 tiargs.insert(j, d.objects); | |
| 902 j--; | |
| 903 } | |
| 904 } | |
| 905 else if (ta) | |
| 906 { | |
| 907 Ltype: | |
| 908 if (ta.ty == Ttuple) | |
| 909 { | |
| 910 // Expand tuple | |
|
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911 auto tt = cast(TypeTuple)ta; |
| 0 | 912 size_t dim = tt.arguments.dim; |
| 913 tiargs.remove(j); | |
| 914 if (dim) | |
| 915 { | |
| 916 tiargs.reserve(dim); | |
| 917 for (size_t i = 0; i < dim; i++) | |
| 918 { | |
|
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919 auto arg = tt.arguments[i]; |
|
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920 tiargs.insert(j + i, arg.type); |
| 0 | 921 } |
| 922 } | |
| 923 j--; | |
| 924 } | |
| 925 else | |
|
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926 tiargs[j] = ta; |
| 0 | 927 } |
| 928 else | |
| 929 { | |
| 930 assert(global.errors); | |
|
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931 tiargs[j] = Type.terror; |
| 0 | 932 } |
| 933 } | |
| 934 else if (ea) | |
| 935 { | |
| 936 if (!ea) | |
| 937 { | |
| 938 assert(global.errors); | |
| 939 ea = new IntegerExp(0); | |
| 940 } | |
| 941 assert(ea); | |
| 942 ea = ea.semantic(sc); | |
| 943 if (ea.op != TOKvar || flags & 1) | |
| 944 ea = ea.optimize(WANTvalue | WANTinterpret); | |
|
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945 tiargs[j] = ea; |
| 0 | 946 if (ea.op == TOKtype) |
| 947 { | |
| 948 ta = ea.type; | |
| 949 goto Ltype; | |
| 950 } | |
| 951 if (ea.op == TOKtuple) | |
| 952 { | |
| 953 // Expand tuple | |
|
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|
954 auto te = cast(TupleExp)ea; |
| 0 | 955 size_t dim = te.exps.dim; |
| 956 tiargs.remove(j); | |
| 957 if (dim) | |
| 958 { | |
| 959 tiargs.reserve(dim); | |
| 960 for (size_t i = 0; i < dim; i++) | |
|
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|
961 tiargs.insert(j + i, te.exps[i]); |
| 0 | 962 } |
| 963 j--; | |
| 964 } | |
| 965 } | |
| 966 else if (sa) | |
| 967 { | |
| 968 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 969 if (td && !td.semanticRun && td.literal) | |
| 970 td.semantic(sc); | |
| 971 } | |
| 972 else | |
| 973 { | |
| 974 assert(0); | |
| 975 } | |
| 976 //printf("1: tiargs.data[%d] = %p\n", j, tiargs.data[j]); | |
| 977 } | |
| 978 | |
| 979 static if (false) { | |
| 980 printf("-TemplateInstance.semanticTiargs('%s', this=%p)\n", toChars(), this); | |
| 981 for (size_t j = 0; j < tiargs.dim; j++) | |
| 982 { | |
| 983 Object o = cast(Object)tiargs.data[j]; | |
| 984 Type ta = isType(o); | |
| 985 Expression ea = isExpression(o); | |
| 986 Dsymbol sa = isDsymbol(o); | |
| 987 Tuple va = isTuple(o); | |
| 988 | |
| 989 printf("\ttiargs[%d] = ta %p, ea %p, sa %p, va %p\n", j, ta, ea, sa, va); | |
| 990 } | |
| 991 } | |
| 992 } | |
| 993 | |
| 994 void semanticTiargs(Scope sc) | |
| 995 { | |
| 996 //printf("+TemplateInstance.semanticTiargs() %s\n", toChars()); | |
| 997 if (semantictiargsdone) | |
| 998 return; | |
| 999 | |
| 1000 semantictiargsdone = 1; | |
| 1001 semanticTiargs(loc, sc, tiargs, 0); | |
| 1002 } | |
| 1003 | |
| 1004 /********************************************** | |
| 1005 * Find template declaration corresponding to template instance. | |
| 1006 */ | |
| 1007 TemplateDeclaration findTemplateDeclaration(Scope sc) | |
| 1008 { | |
| 1009 //printf("TemplateInstance.findTemplateDeclaration() %s\n", toChars()); | |
| 1010 if (!tempdecl) | |
| 1011 { | |
| 1012 /* Given: | |
| 1013 * foo!( ... ) | |
| 1014 * figure out which TemplateDeclaration foo refers to. | |
| 1015 */ | |
| 1016 Dsymbol s; | |
| 1017 Dsymbol scopesym; | |
| 1018 int i; | |
| 1019 | |
| 1020 Identifier id = name; | |
| 1021 s = sc.search(loc, id, &scopesym); | |
| 1022 if (!s) | |
| 1023 { | |
| 1024 error("identifier '%s' is not defined", id.toChars()); | |
| 1025 return null; | |
| 1026 } | |
| 1027 version (LOG) { | |
| 1028 printf("It's an instance of '%s' kind '%s'\n", s.toChars(), s.kind()); | |
| 1029 if (s.parent) | |
| 1030 printf("s.parent = '%s'\n", s.parent.toChars()); | |
| 1031 } | |
| 1032 withsym = scopesym.isWithScopeSymbol(); | |
| 1033 | |
| 1034 /* We might have found an alias within a template when | |
| 1035 * we really want the template. | |
| 1036 */ | |
| 1037 TemplateInstance ti; | |
| 1038 if (s.parent && | |
| 1039 (ti = s.parent.isTemplateInstance()) !is null) | |
| 1040 { | |
| 1041 if ( | |
| 1042 (ti.name == id || | |
| 1043 ti.toAlias().ident == id) | |
| 1044 && | |
| 1045 ti.tempdecl | |
| 1046 ) | |
| 1047 { | |
| 1048 /* This is so that one can refer to the enclosing | |
| 1049 * template, even if it has the same name as a member | |
| 1050 * of the template, if it has a !(arguments) | |
| 1051 */ | |
| 1052 tempdecl = ti.tempdecl; | |
| 1053 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1054 tempdecl = tempdecl.overroot; // then get the start | |
| 1055 | |
| 1056 s = tempdecl; | |
| 1057 } | |
| 1058 } | |
| 1059 | |
| 1060 s = s.toAlias(); | |
| 1061 | |
| 1062 /* It should be a TemplateDeclaration, not some other symbol | |
| 1063 */ | |
| 1064 tempdecl = s.isTemplateDeclaration(); | |
| 1065 if (!tempdecl) | |
| 1066 { | |
| 1067 if (!s.parent && global.errors) | |
| 1068 return null; | |
| 1069 if (!s.parent && s.getType()) | |
| 1070 { | |
| 1071 Dsymbol s2 = s.getType().toDsymbol(sc); | |
| 1072 if (!s2) | |
| 1073 { | |
| 1074 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1075 return null; | |
| 1076 } | |
| 1077 s = s2; | |
| 1078 } | |
| 1079 debug { | |
| 1080 //if (!s.parent) printf("s = %s %s\n", s.kind(), s.toChars()); | |
| 1081 } | |
| 1082 //assert(s.parent); | |
| 1083 TemplateInstance ti2 = s.parent ? s.parent.isTemplateInstance() : null; | |
| 1084 if (ti2 && | |
| 1085 (ti2.name == id || | |
| 1086 ti2.toAlias().ident == id) | |
| 1087 && | |
| 1088 ti2.tempdecl | |
| 1089 ) | |
| 1090 { | |
| 1091 /* This is so that one can refer to the enclosing | |
| 1092 * template, even if it has the same name as a member | |
| 1093 * of the template, if it has a !(arguments) | |
| 1094 */ | |
| 1095 tempdecl = ti2.tempdecl; | |
| 1096 if (tempdecl.overroot) // if not start of overloaded list of TemplateDeclaration's | |
| 1097 tempdecl = tempdecl.overroot; // then get the start | |
| 1098 } | |
| 1099 else | |
| 1100 { | |
| 1101 error("%s is not a template declaration, it is a %s", id.toChars(), s.kind()); | |
| 1102 return null; | |
| 1103 } | |
| 1104 } | |
| 1105 } | |
| 1106 else | |
| 1107 assert(tempdecl.isTemplateDeclaration()); | |
| 1108 | |
| 1109 return tempdecl; | |
| 1110 } | |
| 1111 | |
| 1112 TemplateDeclaration findBestMatch(Scope sc) | |
| 1113 { | |
| 1114 /* Since there can be multiple TemplateDeclaration's with the same | |
| 1115 * name, look for the best match. | |
| 1116 */ | |
| 1117 TemplateDeclaration td_ambig = null; | |
| 1118 TemplateDeclaration td_best = null; | |
| 1119 MATCH m_best = MATCHnomatch; | |
| 1120 scope Objects dedtypes = new Objects(); | |
| 1121 | |
| 1122 version (LOG) { | |
| 1123 printf("TemplateInstance.findBestMatch()\n"); | |
| 1124 } | |
| 1125 // First look for forward references | |
| 1126 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1127 { | |
| 1128 if (!td.semanticRun) | |
| 1129 { | |
| 1130 if (td.scope_) | |
| 1131 { | |
| 1132 // Try to fix forward reference | |
| 1133 td.semantic(td.scope_); | |
| 1134 } | |
| 1135 if (!td.semanticRun) | |
| 1136 { | |
| 1137 error("%s forward references template declaration %s\n", toChars(), td.toChars()); | |
| 1138 return null; | |
| 1139 } | |
| 1140 } | |
| 1141 } | |
| 1142 | |
| 1143 for (TemplateDeclaration td = tempdecl; td; td = td.overnext) | |
| 1144 { | |
| 1145 MATCH m; | |
| 1146 | |
| 1147 //if (tiargs.dim) printf("2: tiargs.dim = %d, data[0] = %p\n", tiargs.dim, tiargs.data[0]); | |
| 1148 | |
| 1149 // If more arguments than parameters, | |
| 1150 // then this is no match. | |
| 1151 if (td.parameters.dim < tiargs.dim) | |
| 1152 { | |
| 1153 if (!td.isVariadic()) | |
| 1154 continue; | |
| 1155 } | |
| 1156 | |
| 1157 dedtypes.setDim(td.parameters.dim); | |
| 1158 dedtypes.zero(); | |
| 1159 assert(td.semanticRun); | |
| 1160 m = td.matchWithInstance(this, dedtypes, 0); | |
| 1161 //printf("matchWithInstance = %d\n", m); | |
| 1162 if (!m) // no match at all | |
| 1163 continue; | |
| 1164 | |
| 1165 if (m < m_best) | |
| 1166 goto Ltd_best; | |
| 1167 if (m > m_best) | |
| 1168 goto Ltd; | |
| 1169 | |
| 1170 { | |
| 1171 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1172 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1173 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1174 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1175 | |
| 1176 if (c1 > c2) | |
| 1177 goto Ltd; | |
| 1178 else if (c1 < c2) | |
| 1179 goto Ltd_best; | |
| 1180 else | |
| 1181 goto Lambig; | |
| 1182 } | |
| 1183 | |
| 1184 Lambig: // td_best and td are ambiguous | |
| 1185 td_ambig = td; | |
| 1186 continue; | |
| 1187 | |
| 1188 Ltd_best: // td_best is the best match so far | |
| 1189 td_ambig = null; | |
| 1190 continue; | |
| 1191 | |
| 1192 Ltd: // td is the new best match | |
| 1193 td_ambig = null; | |
| 1194 td_best = td; | |
| 1195 m_best = m; | |
| 1196 tdtypes.setDim(dedtypes.dim); | |
|
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|
1197 memcpy(tdtypes.ptr, dedtypes.ptr, tdtypes.dim * (void*).sizeof); |
| 0 | 1198 continue; |
| 1199 } | |
| 1200 | |
| 1201 if (!td_best) | |
| 1202 { | |
| 1203 if (tempdecl && !tempdecl.overnext) | |
| 1204 // Only one template, so we can give better error message | |
| 1205 error("%s does not match template declaration %s", toChars(), tempdecl.toChars()); | |
| 1206 else | |
| 1207 error("%s does not match any template declaration", toChars()); | |
| 1208 return null; | |
| 1209 } | |
| 1210 | |
| 1211 if (td_ambig) | |
| 1212 { | |
| 1213 error("%s matches more than one template declaration, %s and %s", | |
| 1214 toChars(), td_best.toChars(), td_ambig.toChars()); | |
| 1215 } | |
| 1216 | |
| 1217 /* The best match is td_best | |
| 1218 */ | |
| 1219 tempdecl = td_best; | |
| 1220 | |
| 1221 static if (false) { | |
| 1222 /* Cast any value arguments to be same type as value parameter | |
| 1223 */ | |
| 1224 for (size_t i = 0; i < tiargs.dim; i++) | |
| 1225 { | |
| 1226 Object o = cast(Object)tiargs.data[i]; | |
| 1227 Expression ea = isExpression(o); // value argument | |
| 1228 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1229 assert(tp); | |
| 1230 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1231 if (tvp) | |
| 1232 { | |
| 1233 assert(ea); | |
| 1234 ea = ea.castTo(tvp.valType); | |
| 1235 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1236 tiargs.data[i] = cast(Object)ea; | |
| 1237 } | |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 version (LOG) { | |
| 1242 printf("\tIt's a match with template declaration '%s'\n", tempdecl.toChars()); | |
| 1243 } | |
| 1244 return tempdecl; | |
| 1245 } | |
| 1246 | |
| 1247 /**************************************************** | |
| 1248 * Declare parameters of template instance, initialize them with the | |
| 1249 * template instance arguments. | |
| 1250 */ | |
| 1251 void declareParameters(Scope sc) | |
| 1252 { | |
|
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|
1253 //printf("TemplateInstance.declareParameters()\n"); |
| 0 | 1254 for (int i = 0; i < tdtypes.dim; i++) |
| 1255 { | |
|
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|
1256 auto tp = tempdecl.parameters[i]; |
| 0 | 1257 //Object o = cast(Object)tiargs.data[i]; |
|
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|
1258 Object o = tdtypes[i]; // initializer for tp |
| 0 | 1259 |
| 1260 //printf("\ttdtypes[%d] = %p\n", i, o); | |
| 1261 tempdecl.declareParameter(sc, tp, o); | |
| 1262 } | |
| 1263 } | |
| 1264 | |
| 1265 /***************************************** | |
| 1266 * Determines if a TemplateInstance will need a nested | |
| 1267 * generation of the TemplateDeclaration. | |
| 1268 */ | |
| 1269 bool hasNestedArgs(Objects args) | |
| 1270 { | |
| 1271 bool nested = false; | |
|
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|
1272 //printf("TemplateInstance.hasNestedArgs('%s')\n", tempdecl.ident.toChars()); |
| 0 | 1273 |
| 1274 /* A nested instance happens when an argument references a local | |
| 1275 * symbol that is on the stack. | |
| 1276 */ | |
| 1277 for (size_t i = 0; i < args.dim; i++) | |
| 1278 { | |
|
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|
1279 Object o = args[i]; |
| 0 | 1280 Expression ea = isExpression(o); |
| 1281 Dsymbol sa = isDsymbol(o); | |
| 1282 Tuple va = isTuple(o); | |
| 1283 if (ea) | |
| 1284 { | |
| 1285 if (ea.op == TOKvar) | |
| 1286 { | |
| 1287 sa = (cast(VarExp)ea).var; | |
| 1288 goto Lsa; | |
| 1289 } | |
| 1290 if (ea.op == TOKfunction) | |
| 1291 { | |
| 1292 sa = (cast(FuncExp)ea).fd; | |
| 1293 goto Lsa; | |
| 1294 } | |
| 1295 } | |
| 1296 else if (sa) | |
| 1297 { | |
| 1298 Lsa: | |
| 1299 TemplateDeclaration td = sa.isTemplateDeclaration(); | |
| 96 | 1300 Declaration d = sa.isDeclaration(); |
| 1301 if ((td && td.literal) || | |
| 1302 (d && !d.isDataseg() && | |
| 1303 | |
| 1304 /// version (DMDV2) { // TODO: | |
| 0 | 1305 !(d.storage_class & STCmanifest) && |
| 1306 /// } | |
| 1307 (!d.isFuncDeclaration() || d.isFuncDeclaration().isNested()) && | |
| 96 | 1308 !isTemplateMixin() |
| 1309 )) | |
| 0 | 1310 { |
| 1311 // if module level template | |
| 1312 if (tempdecl.toParent().isModule()) | |
| 1313 { | |
| 1314 Dsymbol dparent = sa.toParent(); | |
| 1315 if (!isnested) | |
| 1316 isnested = dparent; | |
| 1317 else if (isnested != dparent) | |
| 1318 { | |
| 1319 /* Select the more deeply nested of the two. | |
| 1320 * Error if one is not nested inside the other. | |
| 1321 */ | |
| 1322 for (Dsymbol p = isnested; p; p = p.parent) | |
| 1323 { | |
| 1324 if (p == dparent) | |
| 1325 goto L1; // isnested is most nested | |
| 1326 } | |
| 1327 for (Dsymbol p = dparent; p; p = p.parent) | |
| 1328 { | |
| 1329 if (p == isnested) | |
| 1330 { | |
| 1331 isnested = dparent; | |
| 1332 goto L1; // dparent is most nested | |
| 1333 } | |
| 1334 } | |
| 1335 error("%s is nested in both %s and %s", | |
| 1336 toChars(), isnested.toChars(), dparent.toChars()); | |
| 1337 } | |
| 1338 L1: | |
| 1339 //printf("\tnested inside %s\n", isnested.toChars()); | |
| 1340 nested |= 1; | |
| 1341 } | |
| 1342 else | |
| 1343 error("cannot use local '%s' as parameter to non-global template %s", d.toChars(), tempdecl.toChars()); | |
| 1344 } | |
| 1345 } | |
| 1346 else if (va) | |
| 1347 { | |
| 1348 nested |= hasNestedArgs(va.objects); | |
| 1349 } | |
| 1350 } | |
| 1351 return nested; | |
| 1352 } | |
| 1353 | |
| 1354 /**************************************** | |
| 1355 * This instance needs an identifier for name mangling purposes. | |
| 1356 * Create one by taking the template declaration name and adding | |
| 1357 * the type signature for it. | |
| 1358 */ | |
| 1359 Identifier genIdent() | |
| 1360 { | |
| 1361 scope OutBuffer buf = new OutBuffer(); | |
| 1362 | |
|
20
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Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1363 //printf("TemplateInstance.genIdent('%s')\n", tempdecl.ident.toChars()); |
| 96 | 1364 string id = tempdecl.ident.toChars(); |
| 0 | 1365 buf.printf("__T%d%s", id.length, id); ///! |
| 96 | 1366 Objects args = tiargs; |
| 0 | 1367 for (int i = 0; i < args.dim; i++) |
| 1368 { | |
|
113
3482c73a991b
More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
110
diff
changeset
|
1369 Object o = args[i]; |
| 0 | 1370 Type ta = isType(o); |
| 1371 Expression ea = isExpression(o); | |
| 1372 Dsymbol sa = isDsymbol(o); | |
| 1373 Tuple va = isTuple(o); | |
| 1374 //printf("\to [%d] %p ta %p ea %p sa %p va %p\n", i, o, ta, ea, sa, va); | |
| 1375 if (ta) | |
| 1376 { | |
| 1377 buf.writeByte('T'); | |
| 1378 if (ta.deco) | |
| 1379 buf.writestring(ta.deco); | |
| 1380 else | |
| 1381 { | |
| 1382 debug writef("ta = %d, %s\n", ta.ty, ta.toChars()); | |
| 1383 assert(global.errors); | |
| 1384 } | |
| 1385 } | |
| 1386 else if (ea) | |
| 1387 { | |
| 1388 Lea: | |
| 1389 long v; | |
| 1390 real r; | |
| 1391 | |
| 1392 ea = ea.optimize(WANTvalue | WANTinterpret); | |
| 1393 if (ea.op == TOKvar) | |
| 1394 { | |
| 1395 sa = (cast(VarExp)ea).var; | |
| 1396 ea = null; | |
| 1397 goto Lsa; | |
| 1398 } | |
| 1399 if (ea.op == TOKfunction) | |
| 1400 { | |
| 1401 sa = (cast(FuncExp)ea).fd; | |
| 1402 ea = null; | |
| 1403 goto Lsa; | |
| 1404 } | |
| 1405 buf.writeByte('V'); | |
| 1406 if (ea.op == TOKtuple) | |
| 1407 { | |
| 1408 ea.error("tuple is not a valid template value argument"); | |
| 1409 continue; | |
| 1410 } | |
| 1411 static if (true) { | |
| 1412 /* Use deco that matches what it would be for a function parameter | |
| 1413 */ | |
| 1414 buf.writestring(ea.type.deco); | |
| 1415 } else { | |
| 1416 // Use type of parameter, not type of argument | |
| 1417 TemplateParameter tp = cast(TemplateParameter)tempdecl.parameters.data[i]; | |
| 1418 assert(tp); | |
| 1419 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1420 assert(tvp); | |
| 1421 buf.writestring(tvp.valType.deco); | |
| 1422 } | |
| 1423 ea.toMangleBuffer(buf); | |
| 1424 } | |
| 1425 else if (sa) | |
| 1426 { | |
| 1427 Lsa: | |
| 1428 buf.writeByte('S'); | |
| 1429 Declaration d = sa.isDeclaration(); | |
| 1430 if (d && (!d.type || !d.type.deco)) | |
| 1431 { | |
| 1432 error("forward reference of %s", d.toChars()); | |
| 1433 continue; | |
| 1434 } | |
| 1435 static if (false) { | |
| 1436 VarDeclaration v = sa.isVarDeclaration(); | |
| 1437 if (v && v.storage_class & STCmanifest) | |
| 1438 { | |
| 1439 ExpInitializer ei = v.init.isExpInitializer(); | |
| 1440 if (ei) | |
| 1441 { | |
| 1442 ea = ei.exp; | |
| 1443 goto Lea; | |
| 1444 } | |
| 1445 } | |
| 1446 } | |
| 1447 string p = sa.mangle(); | |
| 62 | 1448 ///buf.printf("%zu%s", p.length, p); |
| 1449 buf.printf("%su%s", p.length, p); | |
| 0 | 1450 } |
| 1451 else if (va) | |
| 1452 { | |
| 1453 assert(i + 1 == args.dim); // must be last one | |
| 1454 args = va.objects; | |
| 1455 i = -1; | |
| 1456 } | |
| 1457 else | |
| 1458 assert(0); | |
| 1459 } | |
| 1460 buf.writeByte('Z'); | |
| 1461 id = buf.toChars(); | |
| 1462 buf.data = null; | |
| 1463 //printf("\tgenIdent = %s\n", id); | |
| 1464 return new Identifier(id, TOKidentifier); | |
| 1465 } | |
| 1466 | |
| 72 | 1467 override TemplateInstance isTemplateInstance() { return this; } |
| 0 | 1468 |
| 72 | 1469 override AliasDeclaration isAliasDeclaration() |
| 0 | 1470 { |
| 1471 assert(false); | |
| 1472 } | |
|
20
1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1473 } |