Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 135:af1bebfd96a4 dmd2037
dmd 2.038
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 13 Sep 2010 22:19:42 +0100 |
| parents | 206db751bd4c |
| children | e3afd1303184 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateDeclaration; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.ScopeDsymbol; | |
| 6 import dmd.ArrayTypes; | |
| 7 import dmd.Dsymbol; | |
| 8 import dmd.STC; | |
| 9 import dmd.TemplateThisParameter; | |
| 10 import dmd.Global; | |
| 11 import dmd.Array; | |
| 12 import dmd.Identifier; | |
| 13 import dmd.TypeArray; | |
| 14 import dmd.Expression; | |
| 15 import dmd.Scope; | |
| 16 import dmd.TypeIdentifier; | |
| 17 import dmd.TypeDelegate; | |
| 18 import dmd.IntegerExp; | |
| 19 import dmd.TypeSArray; | |
| 20 import dmd.StringExp; | |
| 21 import dmd.TOK; | |
|
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22 import dmd.Parameter; |
| 0 | 23 import dmd.CtorDeclaration; |
| 24 import dmd.TypeFunction; | |
| 25 import dmd.TY; | |
| 26 import dmd.OutBuffer; | |
| 27 import dmd.Declaration; | |
| 28 import dmd.HdrGenState; | |
| 29 import dmd.TemplateInstance; | |
| 30 import dmd.WANT; | |
| 31 import dmd.FuncDeclaration; | |
| 32 import dmd.TemplateTupleParameter; | |
| 33 import dmd.MATCH; | |
| 34 import dmd.Type; | |
| 35 import dmd.Tuple; | |
| 36 import dmd.TupleDeclaration; | |
| 37 import dmd.Initializer; | |
| 79 | 38 import dmd.Json; |
| 0 | 39 import dmd.ExpInitializer; |
| 40 import dmd.TemplateValueParameter; | |
| 41 import dmd.AliasDeclaration; | |
| 42 import dmd.VarDeclaration; | |
| 43 import dmd.TemplateParameter; | |
| 44 import dmd.TemplateTypeParameter; | |
|
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45 import dmd.MOD; |
| 0 | 46 |
| 47 import dmd.expression.Util; | |
| 48 | |
| 49 import std.stdio; | |
| 50 | |
| 51 /************************************** | |
| 52 * Determine if TemplateDeclaration is variadic. | |
| 53 */ | |
| 54 | |
| 55 TemplateTupleParameter isVariadic(TemplateParameters parameters) | |
| 56 { | |
| 57 size_t dim = parameters.dim; | |
| 104 | 58 TemplateTupleParameter tp = null; |
| 0 | 59 |
| 104 | 60 if (dim) |
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61 tp = parameters[dim - 1].isTemplateTupleParameter(); |
| 0 | 62 |
| 104 | 63 return tp; |
| 0 | 64 } |
| 65 | |
| 66 void ObjectToCBuffer(OutBuffer buf, HdrGenState* hgs, Object oarg) | |
| 67 { | |
| 104 | 68 //printf("ObjectToCBuffer()\n"); |
| 69 Type t = isType(oarg); | |
| 70 Expression e = isExpression(oarg); | |
| 71 Dsymbol s = isDsymbol(oarg); | |
| 72 Tuple v = isTuple(oarg); | |
| 73 if (t) | |
| 74 { | |
| 0 | 75 //printf("\tt: %s ty = %d\n", t.toChars(), t.ty); |
| 76 t.toCBuffer(buf, null, hgs); | |
| 104 | 77 } |
| 78 else if (e) | |
| 0 | 79 e.toCBuffer(buf, hgs); |
| 104 | 80 else if (s) |
| 81 { | |
| 0 | 82 string p = s.ident ? s.ident.toChars() : s.toChars(); |
| 83 buf.writestring(p); | |
| 104 | 84 } |
| 85 else if (v) | |
| 86 { | |
| 0 | 87 Objects args = v.objects; |
| 88 for (size_t i = 0; i < args.dim; i++) | |
| 89 { | |
| 90 if (i) | |
| 91 buf.writeByte(','); | |
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92 Object o = args[i]; |
| 0 | 93 ObjectToCBuffer(buf, hgs, o); |
| 94 } | |
| 104 | 95 } |
| 96 else if (!oarg) | |
| 97 { | |
| 0 | 98 buf.writestring("null"); |
| 104 | 99 } |
| 100 else | |
| 101 { | |
| 0 | 102 debug writef("bad Object = %p\n", oarg); |
| 103 assert(0); | |
| 104 | 104 } |
| 0 | 105 } |
| 106 | |
| 107 class TemplateDeclaration : ScopeDsymbol | |
| 108 { | |
| 104 | 109 TemplateParameters parameters; // array of TemplateParameter's |
| 0 | 110 |
| 104 | 111 TemplateParameters origParameters; // originals for Ddoc |
| 112 Expression constraint; | |
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113 Vector!TemplateInstance instances; // array of TemplateInstance's |
| 0 | 114 |
| 104 | 115 TemplateDeclaration overnext; // next overloaded TemplateDeclaration |
| 116 TemplateDeclaration overroot; // first in overnext list | |
| 0 | 117 |
| 104 | 118 int semanticRun; // 1 semantic() run |
| 0 | 119 |
| 104 | 120 Dsymbol onemember; // if !=NULL then one member of this template |
| 0 | 121 |
| 104 | 122 int literal; // this template declaration is a literal |
| 0 | 123 |
| 104 | 124 this(Loc loc, Identifier id, TemplateParameters parameters, Expression constraint, Dsymbols decldefs) |
| 0 | 125 { |
| 126 super(id); | |
| 127 | |
| 128 version (LOG) { | |
| 129 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id.toChars()); | |
| 130 } | |
| 131 static if (false) { | |
| 132 if (parameters) | |
| 133 for (int i = 0; i < parameters.dim; i++) | |
| 134 { | |
| 135 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 136 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 137 TemplateTypeParameter ttp = tp.isTemplateTypeParameter(); | |
| 138 | |
| 139 if (ttp) | |
| 140 { | |
| 141 printf("\tparameter[%d] = %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 142 } | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 this.loc = loc; | |
| 147 this.parameters = parameters; | |
| 148 this.origParameters = parameters; | |
| 149 this.constraint = constraint; | |
| 150 this.members = decldefs; | |
| 151 | |
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152 instances = new Vector!TemplateInstance(); |
| 0 | 153 } |
| 154 | |
| 104 | 155 override Dsymbol syntaxCopy(Dsymbol) |
| 0 | 156 { |
| 51 | 157 //printf("TemplateDeclaration.syntaxCopy()\n"); |
| 158 TemplateDeclaration td; | |
| 159 TemplateParameters p; | |
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160 Dsymbols d; |
| 51 | 161 |
| 162 p = null; | |
| 163 if (parameters) | |
| 164 { | |
| 165 p = new TemplateParameters(); | |
| 166 p.setDim(parameters.dim); | |
| 167 for (int i = 0; i < p.dim; i++) | |
| 168 { | |
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169 auto tp = parameters[i]; |
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170 p[i] = tp.syntaxCopy(); |
| 51 | 171 } |
| 172 } | |
| 173 | |
| 174 Expression e = null; | |
| 175 if (constraint) | |
| 176 e = constraint.syntaxCopy(); | |
| 177 d = Dsymbol.arraySyntaxCopy(members); | |
| 178 td = new TemplateDeclaration(loc, ident, p, e, d); | |
| 179 return td; | |
| 0 | 180 } |
| 181 | |
| 104 | 182 override void semantic(Scope sc) |
| 0 | 183 { |
| 184 version (LOG) { | |
| 185 printf("TemplateDeclaration.semantic(this = %p, id = '%s')\n", this, ident.toChars()); | |
| 186 } | |
| 187 if (semanticRun) | |
| 188 return; // semantic() already run | |
| 189 semanticRun = 1; | |
| 190 | |
| 191 if (sc.func) | |
| 192 { | |
| 193 version (DMDV1) { | |
| 194 error("cannot declare template at function scope %s", sc.func.toChars()); | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 if (/*global.params.useArrayBounds &&*/ sc.module_) | |
| 199 { | |
| 200 // Generate this function as it may be used | |
| 201 // when template is instantiated in other modules | |
| 202 sc.module_.toModuleArray(); | |
| 203 } | |
| 204 | |
| 205 if (/*global.params.useAssert &&*/ sc.module_) | |
| 206 { | |
| 207 // Generate this function as it may be used | |
| 208 // when template is instantiated in other modules | |
| 209 sc.module_.toModuleAssert(); | |
| 210 } | |
| 211 | |
| 212 /* Remember Scope for later instantiations, but make | |
| 213 * a copy since attributes can change. | |
| 214 */ | |
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215 this.scope_ = sc.clone(); |
| 0 | 216 this.scope_.setNoFree(); |
| 217 | |
| 218 // Set up scope for parameters | |
| 219 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 220 paramsym.parent = sc.parent; | |
| 221 Scope paramscope = sc.push(paramsym); | |
| 222 paramscope.parameterSpecialization = 1; | |
| 223 paramscope.stc = STCundefined; | |
| 224 | |
| 225 if (!parent) | |
| 226 parent = sc.parent; | |
| 227 | |
| 228 if (global.params.doDocComments) | |
| 229 { | |
| 230 origParameters = new TemplateParameters(); | |
| 231 origParameters.setDim(parameters.dim); | |
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232 foreach (size_t i, TemplateParameter tp; parameters) |
| 0 | 233 { |
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234 origParameters[i] = tp.syntaxCopy(); |
| 0 | 235 } |
| 236 } | |
| 237 | |
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238 foreach (tp; parameters) |
| 0 | 239 { |
| 240 tp.declareParameter(paramscope); | |
| 241 } | |
| 242 | |
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243 foreach (size_t i, TemplateParameter tp; parameters) |
| 0 | 244 { |
| 245 tp.semantic(paramscope); | |
| 246 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 247 error("template tuple parameter must be last one"); | |
| 248 } | |
| 249 | |
| 250 paramscope.pop(); | |
| 251 | |
| 252 if (members) | |
| 253 { | |
| 254 Dsymbol s; | |
| 255 if (Dsymbol.oneMembers(members, &s)) | |
| 256 { | |
| 257 if (s && s.ident && s.ident.equals(ident)) | |
| 258 { | |
| 259 onemember = s; | |
| 260 s.parent = this; | |
| 261 } | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 /* BUG: should check: | |
| 266 * o no virtual functions or non-static data members of classes | |
| 267 */ | |
| 268 } | |
| 269 | |
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270 /********************************** |
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271 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
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272 * Return !=0 if successful; i.e. no conflict. |
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273 */ |
| 104 | 274 override bool overloadInsert(Dsymbol s) |
| 0 | 275 { |
| 50 | 276 TemplateDeclaration *pf; |
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277 TemplateDeclaration f; |
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278 |
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279 version (LOG) { |
| 50 | 280 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
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281 } |
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282 f = s.isTemplateDeclaration(); |
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283 if (!f) |
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284 return false; |
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285 |
| 50 | 286 TemplateDeclaration pthis = this; |
| 287 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
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288 { |
| 50 | 289 static if (false) { |
| 290 // Conflict if TemplateParameter's match | |
| 291 // Will get caught anyway later with TemplateInstance, but | |
| 292 // should check it now. | |
| 293 if (f.parameters.dim != f2.parameters.dim) | |
| 294 goto Lcontinue; | |
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295 |
| 50 | 296 for (int i = 0; i < f.parameters.dim; i++) |
| 297 { | |
| 298 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 299 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
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300 |
| 50 | 301 if (!p1.overloadMatch(p2)) |
| 302 goto Lcontinue; | |
| 303 } | |
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304 |
| 50 | 305 version (LOG) { |
| 306 printf("\tfalse: conflict\n"); | |
| 307 } | |
| 308 return false; | |
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309 |
| 50 | 310 Lcontinue: |
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311 ; |
| 50 | 312 } |
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313 } |
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314 |
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315 f.overroot = this; |
| 50 | 316 *pf = f; |
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317 version (LOG) { |
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318 printf("\ttrue: no conflict\n"); |
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319 } |
| 50 | 320 |
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321 return true; |
| 0 | 322 } |
| 323 | |
| 104 | 324 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 325 { |
| 104 | 326 static if (false) // Should handle template functions |
| 327 { | |
| 328 if (onemember && onemember.isFuncDeclaration()) | |
| 329 buf.writestring("foo "); | |
| 330 } | |
| 331 buf.writestring(kind()); | |
| 332 buf.writeByte(' '); | |
| 333 buf.writestring(ident.toChars()); | |
| 334 buf.writeByte('('); | |
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335 foreach (size_t i, TemplateParameter tp; parameters) |
| 104 | 336 { |
| 337 if (hgs.ddoc) | |
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338 tp = origParameters[i]; |
| 104 | 339 if (i) |
| 340 buf.writeByte(','); | |
| 341 tp.toCBuffer(buf, hgs); | |
| 342 } | |
| 343 buf.writeByte(')'); | |
| 344 version(DMDV2) | |
| 345 { | |
| 346 if (constraint) | |
| 347 { buf.writestring(" if ("); | |
| 348 constraint.toCBuffer(buf, hgs); | |
| 349 buf.writeByte(')'); | |
| 350 } | |
| 351 } | |
| 352 | |
| 353 if (hgs.hdrgen) | |
| 354 { | |
| 355 hgs.tpltMember++; | |
| 356 buf.writenl(); | |
| 357 buf.writebyte('{'); | |
| 358 buf.writenl(); | |
| 359 foreach (Dsymbol s; members) | |
| 360 s.toCBuffer(buf, hgs); | |
| 361 | |
| 362 buf.writebyte('}'); | |
| 363 buf.writenl(); | |
| 364 hgs.tpltMember--; | |
| 365 } | |
| 0 | 366 } |
| 367 | |
| 79 | 368 override void toJsonBuffer(OutBuffer buf) |
| 369 { | |
| 370 //writef("TemplateDeclaration.toJsonBuffer()\n"); | |
| 371 | |
| 372 buf.writestring("{\n"); | |
| 373 | |
| 374 JsonProperty(buf, Pname, toChars()); | |
| 375 JsonProperty(buf, Pkind, kind()); | |
| 376 if (comment) | |
| 377 JsonProperty(buf, Pcomment, comment); | |
| 378 | |
| 379 if (loc.linnum) | |
| 380 JsonProperty(buf, Pline, loc.linnum); | |
| 381 | |
| 382 JsonString(buf, Pmembers); | |
| 383 buf.writestring(" : [\n"); | |
| 384 size_t offset = buf.offset; | |
| 385 foreach (Dsymbol s; members) | |
| 386 { | |
| 387 if (offset != buf.offset) | |
| 96 | 388 { buf.writestring(",\n"); |
| 79 | 389 offset = buf.offset; |
| 390 } | |
| 391 s.toJsonBuffer(buf); | |
| 392 } | |
| 96 | 393 JsonRemoveComma(buf); |
| 79 | 394 buf.writestring("]\n"); |
| 395 | |
| 396 buf.writestring("}\n"); | |
| 397 } | |
| 398 | |
| 104 | 399 override string kind() |
| 0 | 400 { |
| 50 | 401 return (onemember && onemember.isAggregateDeclaration()) |
| 402 ? onemember.kind() | |
| 403 : "template"; | |
| 0 | 404 } |
| 405 | |
| 104 | 406 override string toChars() |
| 0 | 407 { |
| 49 | 408 OutBuffer buf = new OutBuffer(); |
| 409 HdrGenState hgs; | |
| 410 | |
| 411 /// memset(&hgs, 0, hgs.sizeof); | |
| 412 buf.writestring(ident.toChars()); | |
| 413 buf.writeByte('('); | |
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414 foreach (size_t i, TemplateParameter tp; parameters) |
| 49 | 415 { |
| 416 if (i) | |
| 417 buf.writeByte(','); | |
| 418 tp.toCBuffer(buf, &hgs); | |
| 419 } | |
| 420 buf.writeByte(')'); | |
| 421 version (DMDV2) { | |
| 422 if (constraint) | |
| 423 { | |
| 424 buf.writestring(" if ("); | |
| 425 constraint.toCBuffer(buf, &hgs); | |
| 426 buf.writeByte(')'); | |
| 427 } | |
| 428 } | |
| 429 buf.writeByte(0); | |
| 430 return buf.extractString(); | |
| 0 | 431 } |
| 432 | |
| 104 | 433 override void emitComment(Scope sc) |
| 0 | 434 { |
| 435 assert(false); | |
| 436 } | |
| 50 | 437 |
| 104 | 438 // void toDocBuffer(OutBuffer *buf); |
| 0 | 439 |
| 440 /*************************************** | |
| 441 * Given that ti is an instance of this TemplateDeclaration, | |
| 442 * deduce the types of the parameters to this, and store | |
| 443 * those deduced types in dedtypes[]. | |
| 444 * Input: | |
| 445 * flag 1: don't do semantic() because of dummy types | |
| 446 * 2: don't change types in matchArg() | |
| 447 * Output: | |
| 448 * dedtypes deduced arguments | |
| 449 * Return match level. | |
| 450 */ | |
| 104 | 451 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) |
| 0 | 452 { |
| 453 MATCH m; | |
| 454 int dedtypes_dim = dedtypes.dim; | |
| 455 | |
| 456 version (LOGM) { | |
| 50 | 457 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 458 } |
| 459 | |
| 460 static if (false) { | |
| 461 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 462 if (ti.tiargs.dim) | |
| 463 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 464 } | |
| 465 dedtypes.zero(); | |
| 466 | |
| 467 int parameters_dim = parameters.dim; | |
| 468 int variadic = isVariadic() !is null; | |
| 469 | |
| 470 // If more arguments than parameters, no match | |
| 471 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 472 { | |
| 473 version (LOGM) { | |
| 50 | 474 printf(" no match: more arguments than parameters\n"); |
| 0 | 475 } |
| 50 | 476 return MATCHnomatch; |
| 0 | 477 } |
| 478 | |
| 479 assert(dedtypes_dim == parameters_dim); | |
| 480 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 481 | |
| 482 // Set up scope for parameters | |
| 483 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 484 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 485 paramsym.parent = scope_.parent; | |
| 486 Scope paramscope = scope_.push(paramsym); | |
| 487 paramscope.stc = STCundefined; | |
| 488 | |
| 489 // Attempt type deduction | |
| 490 m = MATCHexact; | |
| 491 for (int i = 0; i < dedtypes_dim; i++) | |
| 492 { | |
| 493 MATCH m2; | |
|
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494 auto tp = parameters[i]; |
| 0 | 495 Declaration sparam; |
| 496 | |
| 497 //printf("\targument [%d]\n", i); | |
| 498 version (LOGM) { | |
| 499 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 500 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 501 if (ttp) | |
| 502 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 503 } | |
| 504 | |
| 505 version (DMDV1) { | |
| 506 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 507 } else { | |
| 508 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 509 } | |
| 510 //printf("\tm2 = %d\n", m2); | |
| 511 | |
| 512 if (m2 == MATCHnomatch) | |
| 513 { | |
| 514 static if (false) { | |
| 515 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 516 } | |
| 517 goto Lnomatch; | |
| 518 } | |
| 519 | |
| 520 if (m2 < m) | |
| 521 m = m2; | |
| 522 | |
| 523 if (!flag) | |
| 524 sparam.semantic(paramscope); | |
| 525 if (!paramscope.insert(sparam)) | |
| 526 goto Lnomatch; | |
| 527 } | |
| 528 | |
| 529 if (!flag) | |
| 530 { | |
| 531 /* Any parameter left without a type gets the type of | |
| 532 * its corresponding arg | |
| 533 */ | |
| 534 for (int i = 0; i < dedtypes_dim; i++) | |
| 535 { | |
|
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536 if (!dedtypes[i]) |
| 0 | 537 { |
| 538 assert(i < ti.tiargs.dim); | |
|
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539 dedtypes[i] = ti.tiargs[i]; |
| 0 | 540 } |
| 541 } | |
| 542 } | |
| 543 | |
| 544 version (DMDV2) { | |
| 545 if (m && constraint && !(flag & 1)) | |
| 546 { /* Check to see if constraint is satisfied. | |
| 547 */ | |
|
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548 makeParamNamesVisibleInConstraint(paramscope); |
| 0 | 549 Expression e = constraint.syntaxCopy(); |
| 550 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 551 e = e.semantic(paramscope); | |
| 552 e = e.optimize(WANTvalue | WANTinterpret); | |
| 553 if (e.isBool(true)) { | |
| 554 ; | |
| 555 } else if (e.isBool(false)) | |
| 556 goto Lnomatch; | |
| 557 else | |
| 558 { | |
| 559 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 560 } | |
| 561 } | |
| 562 } | |
| 563 | |
| 564 version (LOGM) { | |
| 565 // Print out the results | |
| 566 printf("--------------------------\n"); | |
| 567 printf("template %s\n", toChars()); | |
| 568 printf("instance %s\n", ti.toChars()); | |
| 569 if (m) | |
| 570 { | |
| 571 for (int i = 0; i < dedtypes_dim; i++) | |
| 572 { | |
| 573 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 574 Object oarg; | |
| 575 | |
| 576 printf(" [%d]", i); | |
| 577 | |
| 578 if (i < ti.tiargs.dim) | |
| 579 oarg = cast(Object)ti.tiargs.data[i]; | |
| 580 else | |
| 581 oarg = null; | |
| 582 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 583 } | |
| 584 } | |
| 585 else | |
| 586 goto Lnomatch; | |
| 587 } | |
| 588 | |
| 589 version (LOGM) { | |
| 590 printf(" match = %d\n", m); | |
| 591 } | |
| 592 goto Lret; | |
| 593 | |
| 594 Lnomatch: | |
| 595 version (LOGM) { | |
| 596 printf(" no match\n"); | |
| 597 } | |
| 598 m = MATCHnomatch; | |
| 599 | |
| 600 Lret: | |
| 601 paramscope.pop(); | |
| 602 version (LOGM) { | |
| 603 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 604 } | |
| 605 return m; | |
| 606 } | |
| 607 | |
| 51 | 608 /******************************************** |
| 609 * Determine partial specialization order of 'this' vs td2. | |
| 610 * Returns: | |
| 611 * match this is at least as specialized as td2 | |
| 612 * 0 td2 is more specialized than this | |
| 613 */ | |
| 104 | 614 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 0 | 615 { |
| 104 | 616 /* This works by taking the template parameters to this template |
| 51 | 617 * declaration and feeding them to td2 as if it were a template |
| 618 * instance. | |
| 619 * If it works, then this template is at least as specialized | |
| 620 * as td2. | |
| 621 */ | |
| 622 | |
| 623 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 624 scope Objects dedtypes = new Objects(); | |
| 625 | |
| 626 version (LOG_LEASTAS) { | |
| 627 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 628 } | |
| 629 | |
| 630 // Set type arguments to dummy template instance to be types | |
| 631 // generated from the parameters to this template declaration | |
| 632 ti.tiargs = new Objects(); | |
| 633 ti.tiargs.setDim(parameters.dim); | |
| 634 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 635 { | |
|
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636 auto tp = parameters[i]; |
| 51 | 637 |
|
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638 auto p = tp.dummyArg(); |
| 51 | 639 if (p) |
|
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|
640 ti.tiargs[i] = p; |
| 51 | 641 else |
| 642 ti.tiargs.setDim(i); | |
| 643 } | |
| 644 | |
| 645 // Temporary Array to hold deduced types | |
| 646 //dedtypes.setDim(parameters.dim); | |
| 647 dedtypes.setDim(td2.parameters.dim); | |
| 648 | |
| 649 // Attempt a type deduction | |
| 650 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 651 if (m) | |
| 652 { | |
| 653 /* A non-variadic template is more specialized than a | |
| 654 * variadic one. | |
| 655 */ | |
| 656 if (isVariadic() && !td2.isVariadic()) | |
| 657 goto L1; | |
| 658 | |
| 659 version (LOG_LEASTAS) { | |
| 660 printf(" matches %d, so is least as specialized\n", m); | |
| 661 } | |
| 662 return m; | |
| 663 } | |
| 664 L1: | |
| 665 version (LOG_LEASTAS) { | |
| 666 printf(" doesn't match, so is not as specialized\n"); | |
| 667 } | |
| 668 return MATCHnomatch; | |
| 0 | 669 } |
| 670 | |
| 671 /************************************************* | |
| 672 * Match function arguments against a specific template function. | |
| 673 * Input: | |
| 674 * loc instantiation location | |
| 675 * targsi Expression/Type initial list of template arguments | |
| 676 * ethis 'this' argument if !null | |
| 677 * fargs arguments to function | |
| 678 * Output: | |
| 679 * dedargs Expression/Type deduced template arguments | |
| 680 * Returns: | |
| 681 * match level | |
| 682 */ | |
| 104 | 683 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) |
| 0 | 684 { |
| 685 size_t nfparams; | |
| 686 size_t nfargs; | |
| 687 size_t nargsi; // array size of targsi | |
| 688 int fptupindex = -1; | |
| 689 int tuple_dim = 0; | |
| 690 MATCH match = MATCHexact; | |
| 691 FuncDeclaration fd = onemember.toAlias().isFuncDeclaration(); | |
|
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692 Parameters fparameters; // function parameter list |
| 0 | 693 int fvarargs; // function varargs |
| 694 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 695 | |
| 79 | 696 static if (false) |
| 697 { | |
| 0 | 698 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); |
| 699 for (i = 0; i < fargs.dim; i++) | |
| 700 { | |
| 701 Expression e = cast(Expression)fargs.data[i]; | |
| 702 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 703 } | |
| 704 printf("fd = %s\n", fd.toChars()); | |
| 705 printf("fd.type = %p\n", fd.type); | |
| 706 } | |
| 707 | |
| 708 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 709 | |
| 710 dedargs.setDim(parameters.dim); | |
| 711 dedargs.zero(); | |
| 712 | |
| 713 dedtypes.setDim(parameters.dim); | |
| 714 dedtypes.zero(); | |
| 715 | |
| 716 // Set up scope for parameters | |
| 717 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 718 paramsym.parent = scope_.parent; | |
| 719 Scope paramscope = scope_.push(paramsym); | |
| 720 | |
| 721 TemplateTupleParameter tp = isVariadic(); | |
|
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722 int tp_is_declared = 0; |
| 0 | 723 |
| 79 | 724 static if (false) |
| 725 { | |
| 0 | 726 for (i = 0; i < dedargs.dim; i++) |
| 727 { | |
| 728 printf("\tdedarg[%d] = ", i); | |
| 729 Object oarg = cast(Object)dedargs.data[i]; | |
| 730 if (oarg) printf("%s", oarg.toChars()); | |
| 731 printf("\n"); | |
| 732 } | |
| 733 } | |
| 734 | |
| 735 | |
| 736 nargsi = 0; | |
| 737 if (targsi) | |
| 79 | 738 { |
| 739 // Set initial template arguments | |
| 0 | 740 nargsi = targsi.dim; |
| 79 | 741 size_t n = parameters.dim; |
| 0 | 742 if (tp) |
| 743 n--; | |
| 744 if (nargsi > n) | |
| 745 { | |
| 746 if (!tp) | |
| 747 goto Lnomatch; | |
| 748 | |
| 749 /* The extra initial template arguments | |
| 750 * now form the tuple argument. | |
| 751 */ | |
|
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changeset
|
752 auto t = new Tuple(); |
| 0 | 753 assert(parameters.dim); |
|
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|
754 dedargs[parameters.dim - 1] = t; |
| 0 | 755 |
| 756 tuple_dim = nargsi - n; | |
| 757 t.objects.setDim(tuple_dim); | |
| 758 for (size_t i = 0; i < tuple_dim; i++) | |
| 759 { | |
|
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|
760 t.objects[i] = targsi[n + i]; |
| 0 | 761 } |
| 762 declareParameter(paramscope, tp, t); | |
|
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|
763 tp_is_declared = 1; |
| 0 | 764 } |
| 765 else | |
| 766 n = nargsi; | |
| 767 | |
|
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|
768 memcpy(dedargs.ptr, targsi.ptr, n * (*dedargs.ptr).sizeof); |
| 0 | 769 |
| 770 for (size_t i = 0; i < n; i++) | |
| 771 { | |
| 772 assert(i < parameters.dim); | |
|
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|
773 auto tp2 = parameters[i]; |
| 0 | 774 MATCH m; |
| 775 Declaration sparam = null; | |
| 776 | |
| 777 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 778 //printf("\tdeduceType m = %d\n", m); | |
| 779 if (m == MATCHnomatch) | |
| 780 goto Lnomatch; | |
| 781 if (m < match) | |
| 782 match = m; | |
| 783 | |
| 784 sparam.semantic(paramscope); | |
| 785 if (!paramscope.insert(sparam)) | |
| 786 goto Lnomatch; | |
| 787 } | |
| 788 } | |
| 79 | 789 static if (false) |
| 790 { | |
| 0 | 791 for (i = 0; i < dedargs.dim; i++) |
| 792 { | |
| 793 printf("\tdedarg[%d] = ", i); | |
| 794 Object oarg = cast(Object)dedargs.data[i]; | |
| 795 if (oarg) printf("%s", oarg.toChars()); | |
| 796 printf("\n"); | |
| 797 } | |
| 798 } | |
| 799 | |
| 135 | 800 fparameters = fd.getParameters(&fvarargs); |
|
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|
801 nfparams = Parameter.dim(fparameters); // number of function parameters |
| 0 | 802 nfargs = fargs ? fargs.dim : 0; // number of function arguments |
| 803 | |
| 804 /* Check for match of function arguments with variadic template | |
| 805 * parameter, such as: | |
| 806 * | |
| 807 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 808 * void main() { Foo(1,2,3); } | |
| 809 */ | |
| 810 if (tp) // if variadic | |
| 811 { | |
| 79 | 812 if (nfparams == 0 && nfargs != 0) // if no function parameters |
| 0 | 813 { |
|
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diff
changeset
|
814 if (tp_is_declared) |
|
60bb0fe4563e
dmdfe 2.037 first main iteration
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
815 goto L2; |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
816 auto t = new Tuple(); |
| 0 | 817 //printf("t = %p\n", t); |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
818 dedargs[parameters.dim - 1] = t; |
| 0 | 819 declareParameter(paramscope, tp, t); |
| 820 goto L2; | |
| 821 } | |
| 822 else if (nfargs < nfparams - 1) | |
| 823 goto L1; | |
| 824 else | |
| 825 { | |
| 826 /* Figure out which of the function parameters matches | |
| 827 * the tuple template parameter. Do this by matching | |
| 828 * type identifiers. | |
| 829 * Set the index of this function parameter to fptupindex. | |
| 830 */ | |
| 831 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 832 { | |
|
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|
833 auto fparam = fparameters[fptupindex]; |
| 0 | 834 if (fparam.type.ty != Tident) |
| 835 continue; | |
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|
836 auto tid = cast(TypeIdentifier)fparam.type; |
| 0 | 837 if (!tp.ident.equals(tid.ident) || tid.idents.dim) |
| 838 continue; | |
| 839 | |
| 840 if (fvarargs) // variadic function doesn't | |
| 841 goto Lnomatch; // go with variadic template | |
| 842 | |
|
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dmdfe 2.037 first main iteration
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diff
changeset
|
843 if (tp_is_declared) |
|
60bb0fe4563e
dmdfe 2.037 first main iteration
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
844 goto L2; |
|
60bb0fe4563e
dmdfe 2.037 first main iteration
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
845 |
| 0 | 846 /* The types of the function arguments |
| 847 * now form the tuple argument. | |
| 848 */ | |
|
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diff
changeset
|
849 auto t = new Tuple(); |
|
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Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
850 dedargs[parameters.dim - 1] = t; |
| 0 | 851 |
| 852 tuple_dim = nfargs - (nfparams - 1); | |
| 853 t.objects.setDim(tuple_dim); | |
| 854 for (size_t i = 0; i < tuple_dim; i++) | |
| 855 { | |
|
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more Expressions work
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87
diff
changeset
|
856 auto farg = fargs[fptupindex + i]; |
|
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Objects -> Vector!Object iteration 1
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diff
changeset
|
857 t.objects[i] = farg.type; |
| 0 | 858 } |
| 859 declareParameter(paramscope, tp, t); | |
| 860 goto L2; | |
| 861 } | |
| 862 fptupindex = -1; | |
| 863 } | |
| 864 } | |
| 865 | |
| 866 L1: | |
| 867 if (nfparams == nfargs) { | |
| 868 ; | |
| 869 } else if (nfargs > nfparams) { | |
| 870 if (fvarargs == 0) | |
| 871 goto Lnomatch; // too many args, no match | |
| 872 match = MATCHconvert; // match ... with a conversion | |
| 873 } | |
| 874 | |
| 875 L2: | |
| 876 version (DMDV2) { | |
| 877 // Match 'ethis' to any TemplateThisParameter's | |
| 878 if (ethis) | |
| 879 { | |
| 880 for (size_t i = 0; i < parameters.dim; i++) | |
| 881 { | |
|
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changeset
|
882 auto tp2 = parameters[i]; |
| 0 | 883 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); |
| 884 if (ttp) | |
| 885 { | |
| 886 MATCH m; | |
| 887 | |
| 888 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 889 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 890 if (!m) | |
| 891 goto Lnomatch; | |
| 892 if (m < match) | |
| 893 match = m; // pick worst match | |
| 894 } | |
| 895 } | |
| 896 } | |
| 897 } | |
| 898 | |
| 899 // Loop through the function parameters | |
| 900 for (size_t i = 0; i < nfparams; i++) | |
| 901 { | |
| 902 /* Skip over function parameters which wound up | |
| 903 * as part of a template tuple parameter. | |
| 904 */ | |
| 905 if (i == fptupindex) | |
| 906 { | |
| 907 if (fptupindex == nfparams - 1) | |
| 908 break; | |
| 909 i += tuple_dim - 1; | |
| 910 continue; | |
| 911 } | |
| 912 | |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
913 auto fparam = Parameter.getNth(fparameters, i); |
| 0 | 914 |
| 915 if (i >= nfargs) // if not enough arguments | |
| 916 { | |
| 917 if (fparam.defaultArg) | |
| 918 { | |
| 919 /* Default arguments do not participate in template argument | |
| 920 * deduction. | |
| 921 */ | |
| 922 goto Lmatch; | |
| 923 } | |
| 924 } | |
| 925 else | |
| 926 { | |
|
90
39648eb578f6
more Expressions work
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927 auto farg = fargs[i]; |
| 0 | 928 static if (false) { |
| 929 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 930 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 931 } | |
| 932 Type argtype = farg.type; | |
| 933 | |
| 934 version (DMDV2) { | |
| 935 /* Allow string literals which are type [] to match with [dim] | |
| 936 */ | |
| 937 if (farg.op == TOKstring) | |
| 938 { | |
| 939 StringExp se = cast(StringExp)farg; | |
| 940 if (!se.committed && argtype.ty == Tarray && | |
| 941 fparam.type.toBasetype().ty == Tsarray) | |
| 942 { | |
| 943 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 944 argtype = argtype.semantic(se.loc, null); | |
| 945 argtype = argtype.invariantOf(); | |
| 946 } | |
| 947 } | |
| 948 } | |
| 949 | |
| 950 MATCH m; | |
| 951 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 952 //printf("\tdeduceType m = %d\n", m); | |
| 953 | |
| 954 /* If no match, see if there's a conversion to a delegate | |
| 955 */ | |
| 956 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 957 { | |
| 958 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 959 TypeFunction tf = cast(TypeFunction)td.next; | |
| 960 | |
|
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961 if (!tf.varargs && Parameter.dim(tf.parameters) == 0) |
| 0 | 962 { |
| 963 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 964 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 965 m = MATCHconvert; | |
| 966 } | |
| 967 //printf("\tm2 = %d\n", m); | |
| 968 } | |
| 969 | |
| 970 if (m) | |
| 971 { | |
| 972 if (m < match) | |
| 973 match = m; // pick worst match | |
| 974 continue; | |
| 975 } | |
| 976 } | |
| 977 | |
| 978 /* The following code for variadic arguments closely | |
| 979 * matches TypeFunction.callMatch() | |
| 980 */ | |
| 981 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 982 goto Lnomatch; | |
| 983 | |
| 984 /* Check for match with function parameter T... | |
| 985 */ | |
| 986 Type tb = fparam.type.toBasetype(); | |
| 987 switch (tb.ty) | |
| 988 { | |
| 989 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 990 case Tsarray: | |
| 991 { | |
| 992 TypeSArray tsa = cast(TypeSArray)tb; | |
| 993 ulong sz = tsa.dim.toInteger(); | |
| 994 if (sz != nfargs - i) | |
| 995 goto Lnomatch; | |
| 996 } | |
| 997 case Tarray: | |
| 998 { | |
| 999 TypeArray ta = cast(TypeArray)tb; | |
| 1000 for (; i < nfargs; i++) | |
| 1001 { | |
|
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1002 auto arg = fargs[i]; |
| 0 | 1003 assert(arg); |
| 1004 MATCH m; | |
| 1005 /* If lazy array of delegates, | |
| 1006 * convert arg(s) to delegate(s) | |
| 1007 */ | |
| 1008 Type tret = fparam.isLazyArray(); | |
| 1009 if (tret) | |
| 1010 { | |
| 1011 if (ta.next.equals(arg.type)) | |
| 1012 { | |
| 1013 m = MATCHexact; | |
| 1014 } | |
| 1015 else | |
| 1016 { | |
| 1017 m = arg.implicitConvTo(tret); | |
| 1018 if (m == MATCHnomatch) | |
| 1019 { | |
| 1020 if (tret.toBasetype().ty == Tvoid) | |
| 1021 m = MATCHconvert; | |
| 1022 } | |
| 1023 } | |
| 1024 } | |
| 1025 else | |
| 1026 { | |
| 1027 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 1028 //m = arg.implicitConvTo(ta.next); | |
| 1029 } | |
| 1030 if (m == MATCHnomatch) | |
| 1031 goto Lnomatch; | |
| 1032 if (m < match) | |
| 1033 match = m; | |
| 1034 } | |
| 1035 goto Lmatch; | |
| 1036 } | |
| 1037 case Tclass: | |
| 1038 case Tident: | |
| 1039 goto Lmatch; | |
| 1040 | |
| 1041 default: | |
| 1042 goto Lnomatch; | |
| 1043 } | |
| 1044 } | |
| 1045 | |
| 1046 Lmatch: | |
| 1047 | |
| 1048 /* Fill in any missing arguments with their defaults. | |
| 1049 */ | |
| 1050 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 1051 { | |
|
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1052 auto tp2 = parameters[i]; |
| 0 | 1053 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); |
| 1054 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 1055 * But for function templates, we really need them to match | |
| 1056 */ | |
|
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1057 Object oarg = dedargs[i]; |
|
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1058 Object oded = dedtypes[i]; |
| 0 | 1059 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); |
| 1060 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 1061 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 1062 if (!oarg) | |
| 1063 { | |
| 1064 if (oded) | |
| 1065 { | |
| 1066 if (tp2.specialization()) | |
| 1067 { | |
| 1068 /* The specialization can work as long as afterwards | |
| 1069 * the oded == oarg | |
| 1070 */ | |
| 1071 Declaration sparam; | |
|
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|
1072 dedargs[i] = oded; |
| 0 | 1073 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); |
| 1074 //printf("m2 = %d\n", m2); | |
| 1075 if (!m2) | |
| 1076 goto Lnomatch; | |
| 1077 if (m2 < match) | |
| 1078 match = m2; // pick worst match | |
|
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|
1079 if (dedtypes[i] !is oded) |
| 0 | 1080 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); |
| 1081 } | |
| 1082 } | |
| 1083 else | |
| 1084 { | |
| 1085 oded = tp2.defaultArg(loc, paramscope); | |
| 1086 if (!oded) | |
| 1087 goto Lnomatch; | |
| 1088 } | |
| 1089 declareParameter(paramscope, tp2, oded); | |
|
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|
1090 dedargs[i] = oded; |
| 0 | 1091 } |
| 1092 } | |
| 1093 | |
| 1094 version (DMDV2) { | |
| 1095 if (constraint) | |
| 1096 { /* Check to see if constraint is satisfied. | |
| 1097 */ | |
|
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1098 makeParamNamesVisibleInConstraint(paramscope); |
| 0 | 1099 Expression e = constraint.syntaxCopy(); |
| 1100 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1101 e = e.semantic(paramscope); | |
| 1102 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1103 if (e.isBool(true)) { | |
| 1104 ; | |
| 1105 } else if (e.isBool(false)) | |
| 1106 goto Lnomatch; | |
| 1107 else | |
| 1108 { | |
| 1109 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1110 } | |
| 1111 } | |
| 1112 } | |
| 1113 | |
| 1114 static if (false) { | |
| 1115 for (i = 0; i < dedargs.dim; i++) | |
| 1116 { | |
| 1117 Type t = cast(Type)dedargs.data[i]; | |
| 1118 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1119 } | |
| 1120 } | |
| 1121 | |
| 1122 paramscope.pop(); | |
| 1123 //printf("\tmatch %d\n", match); | |
| 1124 return match; | |
| 1125 | |
| 1126 Lnomatch: | |
| 1127 paramscope.pop(); | |
| 1128 //printf("\tnomatch\n"); | |
| 1129 return MATCHnomatch; | |
| 1130 } | |
| 104 | 1131 |
| 0 | 1132 /************************************************* |
| 1133 * Given function arguments, figure out which template function | |
| 1134 * to expand, and return that function. | |
| 1135 * If no match, give error message and return null. | |
| 1136 * Input: | |
| 1137 * sc instantiation scope | |
| 1138 * loc instantiation location | |
| 1139 * targsi initial list of template arguments | |
| 1140 * ethis if !null, the 'this' pointer argument | |
| 1141 * fargs arguments to function | |
| 1142 * flags 1: do not issue error message on no match, just return null | |
| 1143 */ | |
| 1144 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1145 { | |
| 1146 MATCH m_best = MATCHnomatch; | |
| 1147 TemplateDeclaration td_ambig = null; | |
| 1148 TemplateDeclaration td_best = null; | |
| 1149 Objects tdargs = new Objects(); | |
| 1150 TemplateInstance ti; | |
| 1151 FuncDeclaration fd; | |
| 1152 | |
| 1153 static if (false) { | |
| 1154 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 104 | 1155 printf(" targsi:\n"); |
| 0 | 1156 if (targsi) |
| 1157 { | |
| 1158 for (int i = 0; i < targsi.dim; i++) | |
| 1159 { | |
| 1160 Object arg = cast(Object)targsi.data[i]; | |
| 1161 printf("\t%s\n", arg.toChars()); | |
| 1162 } | |
| 1163 } | |
| 104 | 1164 printf(" fargs:\n"); |
| 0 | 1165 for (int i = 0; i < fargs.dim; i++) |
| 1166 { | |
| 1167 Expression arg = cast(Expression)fargs.data[i]; | |
| 1168 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1169 //printf("\tty = %d\n", arg.type.ty); | |
| 1170 } | |
| 1171 } | |
| 1172 | |
| 1173 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1174 { | |
| 1175 if (!td.semanticRun) | |
| 1176 { | |
| 1177 error("forward reference to template %s", td.toChars()); | |
| 1178 goto Lerror; | |
| 1179 } | |
| 1180 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1181 { | |
| 1182 error("is not a function template"); | |
| 1183 goto Lerror; | |
| 1184 } | |
| 1185 | |
| 1186 MATCH m; | |
| 1187 scope Objects dedargs = new Objects(); | |
| 1188 | |
| 1189 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1190 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1191 if (!m) // if no match | |
| 1192 continue; | |
| 1193 | |
| 1194 if (m < m_best) | |
| 1195 goto Ltd_best; | |
| 1196 if (m > m_best) | |
| 1197 goto Ltd; | |
| 1198 | |
| 1199 { | |
| 1200 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1201 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1202 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1203 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1204 | |
| 1205 if (c1 > c2) | |
| 1206 goto Ltd; | |
| 1207 else if (c1 < c2) | |
| 1208 goto Ltd_best; | |
| 1209 else | |
| 1210 goto Lambig; | |
| 1211 } | |
| 1212 | |
| 1213 Lambig: // td_best and td are ambiguous | |
| 1214 td_ambig = td; | |
| 1215 continue; | |
| 1216 | |
| 1217 Ltd_best: // td_best is the best match so far | |
| 1218 td_ambig = null; | |
| 1219 continue; | |
| 1220 | |
| 1221 Ltd: // td is the new best match | |
| 1222 td_ambig = null; | |
| 1223 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1224 td_best = td; | |
| 1225 m_best = m; | |
| 1226 tdargs.setDim(dedargs.dim); | |
|
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1227 memcpy(tdargs.ptr, dedargs.ptr, tdargs.dim * (void*).sizeof); |
| 0 | 1228 continue; |
| 1229 } | |
| 1230 if (!td_best) | |
| 1231 { | |
| 1232 if (!(flags & 1)) | |
| 1233 error(loc, "does not match any function template declaration"); | |
| 1234 goto Lerror; | |
| 1235 } | |
| 1236 if (td_ambig) | |
| 1237 { | |
| 1238 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1239 td_best.toChars(), td_ambig.toChars()); | |
| 1240 } | |
| 1241 | |
| 1242 /* The best match is td_best with arguments tdargs. | |
| 1243 * Now instantiate the template. | |
| 1244 */ | |
| 1245 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1246 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 135 | 1247 ti.semantic(sc, fargs); |
| 0 | 1248 fd = ti.toAlias().isFuncDeclaration(); |
| 1249 if (!fd) | |
| 1250 goto Lerror; | |
| 1251 return fd; | |
| 1252 | |
| 1253 Lerror: | |
| 1254 /// version (DMDV2) { | |
| 1255 if (!(flags & 1)) | |
| 1256 /// } | |
| 1257 { | |
| 1258 HdrGenState hgs; | |
| 1259 | |
| 1260 scope OutBuffer bufa = new OutBuffer(); | |
| 1261 Objects args = targsi; | |
| 1262 if (args) | |
| 1263 { | |
| 1264 for (int i = 0; i < args.dim; i++) | |
| 1265 { | |
| 1266 if (i) | |
| 1267 bufa.writeByte(','); | |
|
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1268 Object oarg = args[i]; |
| 0 | 1269 ObjectToCBuffer(bufa, &hgs, oarg); |
| 1270 } | |
| 1271 } | |
| 1272 | |
| 1273 scope OutBuffer buf = new OutBuffer(); | |
| 1274 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1275 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1276 } | |
| 1277 return null; | |
| 1278 } | |
| 1279 | |
| 1280 /************************************************** | |
| 1281 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1282 */ | |
| 104 | 1283 void declareParameter(Scope sc, TemplateParameter tp, Object o) |
| 0 | 1284 { |
| 1285 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1286 | |
| 1287 Type targ = isType(o); | |
| 1288 Expression ea = isExpression(o); | |
| 1289 Dsymbol sa = isDsymbol(o); | |
| 1290 Tuple va = isTuple(o); | |
| 1291 | |
| 1292 Dsymbol s; | |
| 1293 | |
| 1294 // See if tp.ident already exists with a matching definition | |
| 1295 Dsymbol scopesym; | |
| 1296 s = sc.search(loc, tp.ident, &scopesym); | |
| 1297 if (s && scopesym == sc.scopesym) | |
| 1298 { | |
| 1299 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1300 if (va && td) | |
| 1301 { | |
| 1302 Tuple tup = new Tuple(); | |
| 1303 assert(false); // < not implemented | |
| 1304 ///tup.objects = *td.objects; | |
| 1305 if (match(va, tup, this, sc)) | |
| 1306 { | |
| 1307 return; | |
| 1308 } | |
| 1309 } | |
| 1310 } | |
| 1311 | |
| 1312 if (targ) | |
| 1313 { | |
| 1314 //printf("type %s\n", targ.toChars()); | |
| 1315 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1316 } | |
| 1317 else if (sa) | |
| 1318 { | |
| 1319 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1320 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1321 } | |
| 1322 else if (ea) | |
| 1323 { | |
| 1324 // tdtypes.data[i] always matches ea here | |
| 1325 Initializer init = new ExpInitializer(loc, ea); | |
| 1326 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1327 | |
| 1328 Type t = tvp ? tvp.valType : null; | |
| 1329 | |
| 1330 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1331 v.storage_class = STCmanifest; | |
| 1332 s = v; | |
| 1333 } | |
| 1334 else if (va) | |
| 1335 { | |
| 1336 //printf("\ttuple\n"); | |
| 1337 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1338 } | |
| 1339 else | |
| 1340 { | |
| 1341 debug writefln(o.toString()); | |
| 1342 assert(0); | |
| 1343 } | |
| 1344 | |
| 1345 if (!sc.insert(s)) | |
| 1346 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1347 | |
| 1348 s.semantic(sc); | |
| 1349 } | |
| 1350 | |
| 104 | 1351 override TemplateDeclaration isTemplateDeclaration() { return this; } |
| 0 | 1352 |
| 104 | 1353 TemplateTupleParameter isVariadic() |
| 0 | 1354 { |
| 1355 return .isVariadic(parameters); | |
| 1356 } | |
| 1357 | |
| 63 | 1358 /*********************************** |
| 1359 * We can overload templates. | |
| 1360 */ | |
| 104 | 1361 override bool isOverloadable() |
| 0 | 1362 { |
| 104 | 1363 return true; |
| 0 | 1364 } |
|
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1365 |
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1366 /**************************** |
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1367 * Declare all the function parameters as variables |
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1368 * and add them to the scope |
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1369 */ |
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1370 void makeParamNamesVisibleInConstraint(Scope paramscope) |
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1371 { |
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1372 /* We do this ONLY if there is only one function in the template. |
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1373 */ |
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1374 FuncDeclaration fd = onemember && onemember.toAlias() ? |
|
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1375 onemember.toAlias().isFuncDeclaration() : null; |
|
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1376 if (fd) |
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1377 { |
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1378 paramscope.parent = fd; |
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1379 int fvarargs; // function varargs |
| 135 | 1380 Parameters fparameters = fd.getParameters(&fvarargs); |
|
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1381 size_t nfparams = Parameter.dim(fparameters); // Num function parameters |
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1382 for (int i = 0; i < nfparams; i++) |
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1383 { |
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1384 Parameter fparam = Parameter.getNth(fparameters, i).syntaxCopy(); |
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1385 if (!fparam.ident) |
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1386 continue; // don't add it, if it has no name |
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1387 Type vtype = fparam.type.syntaxCopy(); |
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1388 // isPure will segfault if called on a ctor, because fd->type is null. |
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1389 if (fd.type && fd.isPure()) |
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1390 vtype = vtype.addMod(MODconst); |
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1391 VarDeclaration v = new VarDeclaration(loc, vtype, fparam.ident, null); |
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1392 v.storage_class |= STCparameter; |
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1393 // Not sure if this condition is correct/necessary. |
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1394 // It's from func.c |
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1395 if (//fd->type && fd->type->ty == Tfunction && |
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1396 fvarargs == 2 && i + 1 == nfparams) |
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1397 v.storage_class |= STCvariadic; |
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1398 |
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1399 v.storage_class |= fparam.storageClass & (STCin | STCout | STCref | STClazy | STCfinal | STC_TYPECTOR | STCnodtor); |
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1400 v.semantic(paramscope); |
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1401 if (!paramscope.insert(v)) |
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1402 error("parameter %s.%s is already defined", toChars(), v.toChars()); |
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1403 else |
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1404 v.parent = this; |
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1405 } |
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1406 } |
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1407 } |
| 72 | 1408 } |