Mercurial > projects > ddmd
annotate dmd/TemplateDeclaration.d @ 94:3a0b150c9841
Objects -> Vector!Object iteration 1
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 30 Aug 2010 23:00:34 +0100 |
| parents | 39648eb578f6 |
| children | a1cf34da9ebe |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TemplateDeclaration; |
| 2 | |
| 3 import dmd.Loc; | |
| 4 import dmd.ScopeDsymbol; | |
| 5 import dmd.ArrayTypes; | |
| 6 import dmd.Dsymbol; | |
| 7 import dmd.STC; | |
| 8 import dmd.TemplateThisParameter; | |
| 9 import dmd.Global; | |
| 10 import dmd.Array; | |
| 11 import dmd.Identifier; | |
| 12 import dmd.TypeArray; | |
| 13 import dmd.Expression; | |
| 14 import dmd.Scope; | |
| 15 import dmd.TypeIdentifier; | |
| 16 import dmd.TypeDelegate; | |
| 17 import dmd.IntegerExp; | |
| 18 import dmd.TypeSArray; | |
| 19 import dmd.StringExp; | |
| 20 import dmd.TOK; | |
| 21 import dmd.Argument; | |
| 22 import dmd.CtorDeclaration; | |
| 23 import dmd.TypeFunction; | |
| 24 import dmd.TY; | |
| 25 import dmd.OutBuffer; | |
| 26 import dmd.Declaration; | |
| 27 import dmd.HdrGenState; | |
| 28 import dmd.TemplateInstance; | |
| 29 import dmd.WANT; | |
| 30 import dmd.FuncDeclaration; | |
| 31 import dmd.TemplateTupleParameter; | |
| 32 import dmd.MATCH; | |
| 33 import dmd.Type; | |
| 34 import dmd.Tuple; | |
| 35 import dmd.TupleDeclaration; | |
| 36 import dmd.Initializer; | |
| 79 | 37 import dmd.Json; |
| 0 | 38 import dmd.ExpInitializer; |
| 39 import dmd.TemplateValueParameter; | |
| 40 import dmd.AliasDeclaration; | |
| 41 import dmd.VarDeclaration; | |
| 42 import dmd.TemplateParameter; | |
| 43 import dmd.TemplateTypeParameter; | |
| 44 | |
| 45 import dmd.expression.Util; | |
| 46 | |
| 47 import std.stdio; | |
| 48 | |
| 49 /************************************** | |
| 50 * Determine if TemplateDeclaration is variadic. | |
| 51 */ | |
| 52 | |
| 53 TemplateTupleParameter isVariadic(TemplateParameters parameters) | |
| 54 { | |
| 55 size_t dim = parameters.dim; | |
| 56 TemplateTupleParameter tp = null; | |
| 57 | |
| 58 if (dim) | |
| 59 tp = (cast(TemplateParameter)parameters.data[dim - 1]).isTemplateTupleParameter(); | |
| 60 | |
| 61 return tp; | |
| 62 } | |
| 63 | |
| 64 void ObjectToCBuffer(OutBuffer buf, HdrGenState* hgs, Object oarg) | |
| 65 { | |
| 66 //printf("ObjectToCBuffer()\n"); | |
| 67 Type t = isType(oarg); | |
| 68 Expression e = isExpression(oarg); | |
| 69 Dsymbol s = isDsymbol(oarg); | |
| 70 Tuple v = isTuple(oarg); | |
| 71 if (t) | |
| 72 { | |
| 73 //printf("\tt: %s ty = %d\n", t.toChars(), t.ty); | |
| 74 t.toCBuffer(buf, null, hgs); | |
| 75 } | |
| 76 else if (e) | |
| 77 e.toCBuffer(buf, hgs); | |
| 78 else if (s) | |
| 79 { | |
| 80 string p = s.ident ? s.ident.toChars() : s.toChars(); | |
| 81 buf.writestring(p); | |
| 82 } | |
| 83 else if (v) | |
| 84 { | |
| 85 Objects args = v.objects; | |
| 86 for (size_t i = 0; i < args.dim; i++) | |
| 87 { | |
| 88 if (i) | |
| 89 buf.writeByte(','); | |
| 90 Object o = cast(Object)args.data[i]; | |
| 91 ObjectToCBuffer(buf, hgs, o); | |
| 92 } | |
| 93 } | |
| 94 else if (!oarg) | |
| 95 { | |
| 96 buf.writestring("null"); | |
| 97 } | |
| 98 else | |
| 99 { | |
| 100 debug writef("bad Object = %p\n", oarg); | |
| 101 assert(0); | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 class TemplateDeclaration : ScopeDsymbol | |
| 106 { | |
| 107 TemplateParameters parameters; // array of TemplateParameter's | |
| 108 | |
| 109 TemplateParameters origParameters; // originals for Ddoc | |
| 110 Expression constraint; | |
| 111 Array instances; // array of TemplateInstance's | |
| 112 | |
| 113 TemplateDeclaration overnext; // next overloaded TemplateDeclaration | |
| 114 TemplateDeclaration overroot; // first in overnext list | |
| 115 | |
| 116 int semanticRun; // 1 semantic() run | |
| 117 | |
| 118 Dsymbol onemember; // if !=NULL then one member of this template | |
| 119 | |
| 120 int literal; // this template declaration is a literal | |
| 121 | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
122 this(Loc loc, Identifier id, TemplateParameters parameters, Expression constraint, Dsymbols decldefs) |
| 0 | 123 { |
| 124 super(id); | |
| 125 | |
| 126 version (LOG) { | |
| 127 printf("TemplateDeclaration(this = %p, id = '%s')\n", this, id.toChars()); | |
| 128 } | |
| 129 static if (false) { | |
| 130 if (parameters) | |
| 131 for (int i = 0; i < parameters.dim; i++) | |
| 132 { | |
| 133 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 134 //printf("\tparameter[%d] = %p\n", i, tp); | |
| 135 TemplateTypeParameter ttp = tp.isTemplateTypeParameter(); | |
| 136 | |
| 137 if (ttp) | |
| 138 { | |
| 139 printf("\tparameter[%d] = %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 140 } | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 this.loc = loc; | |
| 145 this.parameters = parameters; | |
| 146 this.origParameters = parameters; | |
| 147 this.constraint = constraint; | |
| 148 this.members = decldefs; | |
| 149 | |
| 150 instances = new Array(); | |
| 151 } | |
| 152 | |
| 72 | 153 override Dsymbol syntaxCopy(Dsymbol) |
| 0 | 154 { |
| 51 | 155 //printf("TemplateDeclaration.syntaxCopy()\n"); |
| 156 TemplateDeclaration td; | |
| 157 TemplateParameters p; | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
158 Dsymbols d; |
| 51 | 159 |
| 160 p = null; | |
| 161 if (parameters) | |
| 162 { | |
| 163 p = new TemplateParameters(); | |
| 164 p.setDim(parameters.dim); | |
| 165 for (int i = 0; i < p.dim; i++) | |
| 166 { | |
| 167 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 168 p.data[i] = cast(void*)tp.syntaxCopy(); | |
| 169 } | |
| 170 } | |
| 171 | |
| 172 Expression e = null; | |
| 173 if (constraint) | |
| 174 e = constraint.syntaxCopy(); | |
| 175 d = Dsymbol.arraySyntaxCopy(members); | |
| 176 td = new TemplateDeclaration(loc, ident, p, e, d); | |
| 177 return td; | |
| 0 | 178 } |
| 179 | |
| 72 | 180 override void semantic(Scope sc) |
| 0 | 181 { |
| 182 version (LOG) { | |
| 183 printf("TemplateDeclaration.semantic(this = %p, id = '%s')\n", this, ident.toChars()); | |
| 184 } | |
| 185 if (semanticRun) | |
| 186 return; // semantic() already run | |
| 187 semanticRun = 1; | |
| 188 | |
| 189 if (sc.func) | |
| 190 { | |
| 191 version (DMDV1) { | |
| 192 error("cannot declare template at function scope %s", sc.func.toChars()); | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 if (/*global.params.useArrayBounds &&*/ sc.module_) | |
| 197 { | |
| 198 // Generate this function as it may be used | |
| 199 // when template is instantiated in other modules | |
| 200 sc.module_.toModuleArray(); | |
| 201 } | |
| 202 | |
| 203 if (/*global.params.useAssert &&*/ sc.module_) | |
| 204 { | |
| 205 // Generate this function as it may be used | |
| 206 // when template is instantiated in other modules | |
| 207 sc.module_.toModuleAssert(); | |
| 208 } | |
| 209 | |
| 210 /* Remember Scope for later instantiations, but make | |
| 211 * a copy since attributes can change. | |
| 212 */ | |
|
87
b17640f0e4e8
Fixed a bug with a Scope.this(Scope enclosing) being called instead of Scope.clone() method (as a copy ctor replacement)
korDen
parents:
79
diff
changeset
|
213 this.scope_ = sc.clone(); |
| 0 | 214 this.scope_.setNoFree(); |
| 215 | |
| 216 // Set up scope for parameters | |
| 217 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 218 paramsym.parent = sc.parent; | |
| 219 Scope paramscope = sc.push(paramsym); | |
| 220 paramscope.parameterSpecialization = 1; | |
| 221 paramscope.stc = STCundefined; | |
| 222 | |
| 223 if (!parent) | |
| 224 parent = sc.parent; | |
| 225 | |
| 226 if (global.params.doDocComments) | |
| 227 { | |
| 228 origParameters = new TemplateParameters(); | |
| 229 origParameters.setDim(parameters.dim); | |
| 230 for (int i = 0; i < parameters.dim; i++) | |
| 231 { | |
| 232 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 233 origParameters.data[i] = cast(void*)tp.syntaxCopy(); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 for (int i = 0; i < parameters.dim; i++) | |
| 238 { | |
| 239 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 240 tp.declareParameter(paramscope); | |
| 241 } | |
| 242 | |
| 243 for (int i = 0; i < parameters.dim; i++) | |
| 244 { | |
| 245 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 246 | |
| 247 tp.semantic(paramscope); | |
| 248 if (i + 1 != parameters.dim && tp.isTemplateTupleParameter()) | |
| 249 error("template tuple parameter must be last one"); | |
| 250 } | |
| 251 | |
| 252 paramscope.pop(); | |
| 253 | |
| 254 if (members) | |
| 255 { | |
| 256 Dsymbol s; | |
| 257 if (Dsymbol.oneMembers(members, &s)) | |
| 258 { | |
| 259 if (s && s.ident && s.ident.equals(ident)) | |
| 260 { | |
| 261 onemember = s; | |
| 262 s.parent = this; | |
| 263 } | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 /* BUG: should check: | |
| 268 * o no virtual functions or non-static data members of classes | |
| 269 */ | |
| 270 } | |
| 271 | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
272 /********************************** |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
273 * Overload existing TemplateDeclaration 'this' with the new one 's'. |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
274 * Return !=0 if successful; i.e. no conflict. |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
275 */ |
| 72 | 276 override bool overloadInsert(Dsymbol s) |
| 0 | 277 { |
| 50 | 278 TemplateDeclaration *pf; |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
279 TemplateDeclaration f; |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
280 |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
281 version (LOG) { |
| 50 | 282 printf("TemplateDeclaration.overloadInsert('%.*s')\n", s.toChars()); |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
283 } |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
284 f = s.isTemplateDeclaration(); |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
285 if (!f) |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
286 return false; |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
287 |
| 50 | 288 TemplateDeclaration pthis = this; |
| 289 for (pf = &pthis; *pf; pf = &(*pf).overnext) | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
290 { |
| 50 | 291 static if (false) { |
| 292 // Conflict if TemplateParameter's match | |
| 293 // Will get caught anyway later with TemplateInstance, but | |
| 294 // should check it now. | |
| 295 if (f.parameters.dim != f2.parameters.dim) | |
| 296 goto Lcontinue; | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
297 |
| 50 | 298 for (int i = 0; i < f.parameters.dim; i++) |
| 299 { | |
| 300 TemplateParameter p1 = cast(TemplateParameter)f.parameters.data[i]; | |
| 301 TemplateParameter p2 = cast(TemplateParameter)f2.parameters.data[i]; | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
302 |
| 50 | 303 if (!p1.overloadMatch(p2)) |
| 304 goto Lcontinue; | |
| 305 } | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
306 |
| 50 | 307 version (LOG) { |
| 308 printf("\tfalse: conflict\n"); | |
| 309 } | |
| 310 return false; | |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
311 |
| 50 | 312 Lcontinue: |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
313 ; |
| 50 | 314 } |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
315 } |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
316 |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
317 f.overroot = this; |
| 50 | 318 *pf = f; |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
319 version (LOG) { |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
320 printf("\ttrue: no conflict\n"); |
|
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
321 } |
| 50 | 322 |
|
8
d42cd5917df4
wysiwyg strings, alias this, templates, TypeSlice implementation
dkoroskin <>
parents:
0
diff
changeset
|
323 return true; |
| 0 | 324 } |
| 325 | |
| 72 | 326 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 327 { |
| 328 assert(false); | |
| 329 } | |
| 330 | |
| 79 | 331 override void toJsonBuffer(OutBuffer buf) |
| 332 { | |
| 333 //writef("TemplateDeclaration.toJsonBuffer()\n"); | |
| 334 | |
| 335 buf.writestring("{\n"); | |
| 336 | |
| 337 JsonProperty(buf, Pname, toChars()); | |
| 338 JsonProperty(buf, Pkind, kind()); | |
| 339 if (comment) | |
| 340 JsonProperty(buf, Pcomment, comment); | |
| 341 | |
| 342 if (loc.linnum) | |
| 343 JsonProperty(buf, Pline, loc.linnum); | |
| 344 | |
| 345 JsonString(buf, Pmembers); | |
| 346 buf.writestring(" : [\n"); | |
| 347 size_t offset = buf.offset; | |
| 348 foreach (Dsymbol s; members) | |
| 349 { | |
| 350 if (offset != buf.offset) | |
| 351 { buf.writestring(","); | |
| 352 offset = buf.offset; | |
| 353 } | |
| 354 s.toJsonBuffer(buf); | |
| 355 } | |
| 356 buf.writestring("]\n"); | |
| 357 | |
| 358 buf.writestring("}\n"); | |
| 359 } | |
| 360 | |
| 72 | 361 override string kind() |
| 0 | 362 { |
| 50 | 363 return (onemember && onemember.isAggregateDeclaration()) |
| 364 ? onemember.kind() | |
| 365 : "template"; | |
| 0 | 366 } |
| 367 | |
| 72 | 368 override string toChars() |
| 0 | 369 { |
| 49 | 370 OutBuffer buf = new OutBuffer(); |
| 371 HdrGenState hgs; | |
| 372 | |
| 373 /// memset(&hgs, 0, hgs.sizeof); | |
| 374 buf.writestring(ident.toChars()); | |
| 375 buf.writeByte('('); | |
| 376 for (int i = 0; i < parameters.dim; i++) | |
| 377 { | |
| 378 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 379 if (i) | |
| 380 buf.writeByte(','); | |
| 381 tp.toCBuffer(buf, &hgs); | |
| 382 } | |
| 383 buf.writeByte(')'); | |
| 384 version (DMDV2) { | |
| 385 if (constraint) | |
| 386 { | |
| 387 buf.writestring(" if ("); | |
| 388 constraint.toCBuffer(buf, &hgs); | |
| 389 buf.writeByte(')'); | |
| 390 } | |
| 391 } | |
| 392 buf.writeByte(0); | |
| 393 return buf.extractString(); | |
| 0 | 394 } |
| 395 | |
| 72 | 396 override void emitComment(Scope sc) |
| 0 | 397 { |
| 398 assert(false); | |
| 399 } | |
| 50 | 400 |
| 0 | 401 // void toDocBuffer(OutBuffer *buf); |
| 402 | |
| 403 /*************************************** | |
| 404 * Given that ti is an instance of this TemplateDeclaration, | |
| 405 * deduce the types of the parameters to this, and store | |
| 406 * those deduced types in dedtypes[]. | |
| 407 * Input: | |
| 408 * flag 1: don't do semantic() because of dummy types | |
| 409 * 2: don't change types in matchArg() | |
| 410 * Output: | |
| 411 * dedtypes deduced arguments | |
| 412 * Return match level. | |
| 413 */ | |
| 414 MATCH matchWithInstance(TemplateInstance ti, Objects dedtypes, int flag) | |
| 415 { | |
| 416 MATCH m; | |
| 417 int dedtypes_dim = dedtypes.dim; | |
| 418 | |
| 419 version (LOGM) { | |
| 50 | 420 printf("\n+TemplateDeclaration.matchWithInstance(this = %.*s, ti = %.*s, flag = %d)\n", toChars(), ti.toChars(), flag); |
| 0 | 421 } |
| 422 | |
| 423 static if (false) { | |
| 424 printf("dedtypes.dim = %d, parameters.dim = %d\n", dedtypes_dim, parameters.dim); | |
| 425 if (ti.tiargs.dim) | |
| 426 printf("ti.tiargs.dim = %d, [0] = %p\n", ti.tiargs.dim, ti.tiargs.data[0]); | |
| 427 } | |
| 428 dedtypes.zero(); | |
| 429 | |
| 430 int parameters_dim = parameters.dim; | |
| 431 int variadic = isVariadic() !is null; | |
| 432 | |
| 433 // If more arguments than parameters, no match | |
| 434 if (ti.tiargs.dim > parameters_dim && !variadic) | |
| 435 { | |
| 436 version (LOGM) { | |
| 50 | 437 printf(" no match: more arguments than parameters\n"); |
| 0 | 438 } |
| 50 | 439 return MATCHnomatch; |
| 0 | 440 } |
| 441 | |
| 442 assert(dedtypes_dim == parameters_dim); | |
| 443 assert(dedtypes_dim >= ti.tiargs.dim || variadic); | |
| 444 | |
| 445 // Set up scope for parameters | |
| 446 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 447 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 448 paramsym.parent = scope_.parent; | |
| 449 Scope paramscope = scope_.push(paramsym); | |
| 450 paramscope.stc = STCundefined; | |
| 451 | |
| 452 // Attempt type deduction | |
| 453 m = MATCHexact; | |
| 454 for (int i = 0; i < dedtypes_dim; i++) | |
| 455 { | |
| 456 MATCH m2; | |
| 457 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 458 Declaration sparam; | |
| 459 | |
| 460 //printf("\targument [%d]\n", i); | |
| 461 version (LOGM) { | |
| 462 //printf("\targument [%d] is %s\n", i, oarg ? oarg.toChars() : "null"); | |
| 463 TemplateTypeParameter *ttp = tp.isTemplateTypeParameter(); | |
| 464 if (ttp) | |
| 465 printf("\tparameter[%d] is %s : %s\n", i, tp.ident.toChars(), ttp.specType ? ttp.specType.toChars() : ""); | |
| 466 } | |
| 467 | |
| 468 version (DMDV1) { | |
| 469 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam); | |
| 470 } else { | |
| 471 m2 = tp.matchArg(paramscope, ti.tiargs, i, parameters, dedtypes, &sparam, (flag & 2) ? 1 : 0); | |
| 472 } | |
| 473 //printf("\tm2 = %d\n", m2); | |
| 474 | |
| 475 if (m2 == MATCHnomatch) | |
| 476 { | |
| 477 static if (false) { | |
| 478 printf("\tmatchArg() for parameter %i failed\n", i); | |
| 479 } | |
| 480 goto Lnomatch; | |
| 481 } | |
| 482 | |
| 483 if (m2 < m) | |
| 484 m = m2; | |
| 485 | |
| 486 if (!flag) | |
| 487 sparam.semantic(paramscope); | |
| 488 if (!paramscope.insert(sparam)) | |
| 489 goto Lnomatch; | |
| 490 } | |
| 491 | |
| 492 if (!flag) | |
| 493 { | |
| 494 /* Any parameter left without a type gets the type of | |
| 495 * its corresponding arg | |
| 496 */ | |
| 497 for (int i = 0; i < dedtypes_dim; i++) | |
| 498 { | |
| 499 if (!dedtypes.data[i]) | |
| 500 { | |
| 501 assert(i < ti.tiargs.dim); | |
| 502 dedtypes.data[i] = ti.tiargs.data[i]; | |
| 503 } | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 version (DMDV2) { | |
| 508 if (m && constraint && !(flag & 1)) | |
| 509 { /* Check to see if constraint is satisfied. | |
| 510 */ | |
| 511 Expression e = constraint.syntaxCopy(); | |
| 512 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 513 e = e.semantic(paramscope); | |
| 514 e = e.optimize(WANTvalue | WANTinterpret); | |
| 515 if (e.isBool(true)) { | |
| 516 ; | |
| 517 } else if (e.isBool(false)) | |
| 518 goto Lnomatch; | |
| 519 else | |
| 520 { | |
| 521 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 522 } | |
| 523 } | |
| 524 } | |
| 525 | |
| 526 version (LOGM) { | |
| 527 // Print out the results | |
| 528 printf("--------------------------\n"); | |
| 529 printf("template %s\n", toChars()); | |
| 530 printf("instance %s\n", ti.toChars()); | |
| 531 if (m) | |
| 532 { | |
| 533 for (int i = 0; i < dedtypes_dim; i++) | |
| 534 { | |
| 535 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 536 Object oarg; | |
| 537 | |
| 538 printf(" [%d]", i); | |
| 539 | |
| 540 if (i < ti.tiargs.dim) | |
| 541 oarg = cast(Object)ti.tiargs.data[i]; | |
| 542 else | |
| 543 oarg = null; | |
| 544 tp.print(oarg, cast(Object)dedtypes.data[i]); | |
| 545 } | |
| 546 } | |
| 547 else | |
| 548 goto Lnomatch; | |
| 549 } | |
| 550 | |
| 551 version (LOGM) { | |
| 552 printf(" match = %d\n", m); | |
| 553 } | |
| 554 goto Lret; | |
| 555 | |
| 556 Lnomatch: | |
| 557 version (LOGM) { | |
| 558 printf(" no match\n"); | |
| 559 } | |
| 560 m = MATCHnomatch; | |
| 561 | |
| 562 Lret: | |
| 563 paramscope.pop(); | |
| 564 version (LOGM) { | |
| 565 printf("-TemplateDeclaration.matchWithInstance(this = %p, ti = %p) = %d\n", this, ti, m); | |
| 566 } | |
| 567 return m; | |
| 568 } | |
| 569 | |
| 51 | 570 /******************************************** |
| 571 * Determine partial specialization order of 'this' vs td2. | |
| 572 * Returns: | |
| 573 * match this is at least as specialized as td2 | |
| 574 * 0 td2 is more specialized than this | |
| 575 */ | |
| 0 | 576 MATCH leastAsSpecialized(TemplateDeclaration td2) |
| 577 { | |
| 51 | 578 /* This works by taking the template parameters to this template |
| 579 * declaration and feeding them to td2 as if it were a template | |
| 580 * instance. | |
| 581 * If it works, then this template is at least as specialized | |
| 582 * as td2. | |
| 583 */ | |
| 584 | |
| 585 scope TemplateInstance ti = new TemplateInstance(Loc(0), ident); // create dummy template instance | |
| 586 scope Objects dedtypes = new Objects(); | |
| 587 | |
| 588 version (LOG_LEASTAS) { | |
| 589 printf("%s.leastAsSpecialized(%s)\n", toChars(), td2.toChars()); | |
| 590 } | |
| 591 | |
| 592 // Set type arguments to dummy template instance to be types | |
| 593 // generated from the parameters to this template declaration | |
| 594 ti.tiargs = new Objects(); | |
| 595 ti.tiargs.setDim(parameters.dim); | |
| 596 for (int i = 0; i < ti.tiargs.dim; i++) | |
| 597 { | |
| 598 TemplateParameter tp = cast(TemplateParameter)parameters.data[i]; | |
| 599 | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
600 auto p = tp.dummyArg(); |
| 51 | 601 if (p) |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
602 ti.tiargs[i] = p; |
| 51 | 603 else |
| 604 ti.tiargs.setDim(i); | |
| 605 } | |
| 606 | |
| 607 // Temporary Array to hold deduced types | |
| 608 //dedtypes.setDim(parameters.dim); | |
| 609 dedtypes.setDim(td2.parameters.dim); | |
| 610 | |
| 611 // Attempt a type deduction | |
| 612 MATCH m = td2.matchWithInstance(ti, dedtypes, 1); | |
| 613 if (m) | |
| 614 { | |
| 615 /* A non-variadic template is more specialized than a | |
| 616 * variadic one. | |
| 617 */ | |
| 618 if (isVariadic() && !td2.isVariadic()) | |
| 619 goto L1; | |
| 620 | |
| 621 version (LOG_LEASTAS) { | |
| 622 printf(" matches %d, so is least as specialized\n", m); | |
| 623 } | |
| 624 return m; | |
| 625 } | |
| 626 L1: | |
| 627 version (LOG_LEASTAS) { | |
| 628 printf(" doesn't match, so is not as specialized\n"); | |
| 629 } | |
| 630 return MATCHnomatch; | |
| 0 | 631 } |
| 632 | |
| 633 /************************************************* | |
| 634 * Match function arguments against a specific template function. | |
| 635 * Input: | |
| 636 * loc instantiation location | |
| 637 * targsi Expression/Type initial list of template arguments | |
| 638 * ethis 'this' argument if !null | |
| 639 * fargs arguments to function | |
| 640 * Output: | |
| 641 * dedargs Expression/Type deduced template arguments | |
| 642 * Returns: | |
| 643 * match level | |
| 644 */ | |
| 645 MATCH deduceFunctionTemplateMatch(Loc loc, Objects targsi, Expression ethis, Expressions fargs, Objects dedargs) | |
| 646 { | |
| 647 size_t nfparams; | |
| 648 size_t nfargs; | |
| 649 size_t nargsi; // array size of targsi | |
| 650 int fptupindex = -1; | |
| 651 int tuple_dim = 0; | |
| 652 MATCH match = MATCHexact; | |
| 653 FuncDeclaration fd = onemember.toAlias().isFuncDeclaration(); | |
| 654 Arguments fparameters; // function parameter list | |
| 655 int fvarargs; // function varargs | |
| 656 scope Objects dedtypes = new Objects(); // for T:T*, the dedargs is the T*, dedtypes is the T | |
| 657 | |
| 79 | 658 static if (false) |
| 659 { | |
| 0 | 660 printf("\nTemplateDeclaration.deduceFunctionTemplateMatch() %s\n", toChars()); |
| 661 for (i = 0; i < fargs.dim; i++) | |
| 662 { | |
| 663 Expression e = cast(Expression)fargs.data[i]; | |
| 664 printf("\tfarg[%d] is %s, type is %s\n", i, e.toChars(), e.type.toChars()); | |
| 665 } | |
| 666 printf("fd = %s\n", fd.toChars()); | |
| 667 printf("fd.type = %p\n", fd.type); | |
| 668 } | |
| 669 | |
| 670 assert(cast(size_t)cast(void*)scope_ > 0x10000); | |
| 671 | |
| 672 dedargs.setDim(parameters.dim); | |
| 673 dedargs.zero(); | |
| 674 | |
| 675 dedtypes.setDim(parameters.dim); | |
| 676 dedtypes.zero(); | |
| 677 | |
| 678 // Set up scope for parameters | |
| 679 ScopeDsymbol paramsym = new ScopeDsymbol(); | |
| 680 paramsym.parent = scope_.parent; | |
| 681 Scope paramscope = scope_.push(paramsym); | |
| 682 | |
| 683 TemplateTupleParameter tp = isVariadic(); | |
| 684 | |
| 79 | 685 static if (false) |
| 686 { | |
| 0 | 687 for (i = 0; i < dedargs.dim; i++) |
| 688 { | |
| 689 printf("\tdedarg[%d] = ", i); | |
| 690 Object oarg = cast(Object)dedargs.data[i]; | |
| 691 if (oarg) printf("%s", oarg.toChars()); | |
| 692 printf("\n"); | |
| 693 } | |
| 694 } | |
| 695 | |
| 696 | |
| 697 nargsi = 0; | |
| 698 if (targsi) | |
| 79 | 699 { |
| 700 // Set initial template arguments | |
| 0 | 701 nargsi = targsi.dim; |
| 79 | 702 size_t n = parameters.dim; |
| 0 | 703 if (tp) |
| 704 n--; | |
| 705 if (nargsi > n) | |
| 706 { | |
| 707 if (!tp) | |
| 708 goto Lnomatch; | |
| 709 | |
| 710 /* The extra initial template arguments | |
| 711 * now form the tuple argument. | |
| 712 */ | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
713 auto t = new Tuple(); |
| 0 | 714 assert(parameters.dim); |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
715 dedargs[parameters.dim - 1] = t; |
| 0 | 716 |
| 717 tuple_dim = nargsi - n; | |
| 718 t.objects.setDim(tuple_dim); | |
| 719 for (size_t i = 0; i < tuple_dim; i++) | |
| 720 { | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
721 t.objects[i] = targsi[n + i]; |
| 0 | 722 } |
| 723 declareParameter(paramscope, tp, t); | |
| 724 } | |
| 725 else | |
| 726 n = nargsi; | |
| 727 | |
| 728 memcpy(dedargs.data, targsi.data, n * (*dedargs.data).sizeof); | |
| 729 | |
| 730 for (size_t i = 0; i < n; i++) | |
| 731 { | |
| 732 assert(i < parameters.dim); | |
| 733 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 734 MATCH m; | |
| 735 Declaration sparam = null; | |
| 736 | |
| 737 m = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam); | |
| 738 //printf("\tdeduceType m = %d\n", m); | |
| 739 if (m == MATCHnomatch) | |
| 740 goto Lnomatch; | |
| 741 if (m < match) | |
| 742 match = m; | |
| 743 | |
| 744 sparam.semantic(paramscope); | |
| 745 if (!paramscope.insert(sparam)) | |
| 746 goto Lnomatch; | |
| 747 } | |
| 748 } | |
| 79 | 749 static if (false) |
| 750 { | |
| 0 | 751 for (i = 0; i < dedargs.dim; i++) |
| 752 { | |
| 753 printf("\tdedarg[%d] = ", i); | |
| 754 Object oarg = cast(Object)dedargs.data[i]; | |
| 755 if (oarg) printf("%s", oarg.toChars()); | |
| 756 printf("\n"); | |
| 757 } | |
| 758 } | |
| 759 | |
| 760 if (fd.type) | |
| 761 { | |
| 762 assert(fd.type.ty == Tfunction); | |
| 763 TypeFunction fdtype = cast(TypeFunction)fd.type; | |
| 764 fparameters = fdtype.parameters; | |
| 765 fvarargs = fdtype.varargs; | |
| 766 } | |
| 767 else | |
| 768 { | |
| 769 CtorDeclaration fctor = fd.isCtorDeclaration(); | |
| 770 assert(fctor); | |
| 771 fparameters = fctor.arguments; | |
| 772 fvarargs = fctor.varargs; | |
| 773 } | |
| 774 | |
| 775 nfparams = Argument.dim(fparameters); // number of function parameters | |
| 776 nfargs = fargs ? fargs.dim : 0; // number of function arguments | |
| 777 | |
| 778 /* Check for match of function arguments with variadic template | |
| 779 * parameter, such as: | |
| 780 * | |
| 781 * template Foo(T, A...) { void Foo(T t, A a); } | |
| 782 * void main() { Foo(1,2,3); } | |
| 783 */ | |
| 784 if (tp) // if variadic | |
| 785 { | |
| 79 | 786 if (nfparams == 0 && nfargs != 0) // if no function parameters |
| 0 | 787 { |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
788 auto t = new Tuple(); |
| 0 | 789 //printf("t = %p\n", t); |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
790 dedargs[parameters.dim - 1] = t; |
| 0 | 791 declareParameter(paramscope, tp, t); |
| 792 goto L2; | |
| 793 } | |
| 794 else if (nfargs < nfparams - 1) | |
| 795 goto L1; | |
| 796 else | |
| 797 { | |
| 798 /* Figure out which of the function parameters matches | |
| 799 * the tuple template parameter. Do this by matching | |
| 800 * type identifiers. | |
| 801 * Set the index of this function parameter to fptupindex. | |
| 802 */ | |
| 803 for (fptupindex = 0; fptupindex < nfparams; fptupindex++) | |
| 804 { | |
| 805 Argument fparam = cast(Argument)fparameters.data[fptupindex]; | |
| 806 if (fparam.type.ty != Tident) | |
| 807 continue; | |
| 808 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 809 if (!tp.ident.equals(tid.ident) || tid.idents.dim) | |
| 810 continue; | |
| 811 | |
| 812 if (fvarargs) // variadic function doesn't | |
| 813 goto Lnomatch; // go with variadic template | |
| 814 | |
| 815 /* The types of the function arguments | |
| 816 * now form the tuple argument. | |
| 817 */ | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
818 auto t = new Tuple(); |
|
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
819 dedargs[parameters.dim - 1] = t; |
| 0 | 820 |
| 821 tuple_dim = nfargs - (nfparams - 1); | |
| 822 t.objects.setDim(tuple_dim); | |
| 823 for (size_t i = 0; i < tuple_dim; i++) | |
| 824 { | |
|
90
39648eb578f6
more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
87
diff
changeset
|
825 auto farg = fargs[fptupindex + i]; |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
826 t.objects[i] = farg.type; |
| 0 | 827 } |
| 828 declareParameter(paramscope, tp, t); | |
| 829 goto L2; | |
| 830 } | |
| 831 fptupindex = -1; | |
| 832 } | |
| 833 } | |
| 834 | |
| 835 L1: | |
| 836 if (nfparams == nfargs) { | |
| 837 ; | |
| 838 } else if (nfargs > nfparams) { | |
| 839 if (fvarargs == 0) | |
| 840 goto Lnomatch; // too many args, no match | |
| 841 match = MATCHconvert; // match ... with a conversion | |
| 842 } | |
| 843 | |
| 844 L2: | |
| 845 version (DMDV2) { | |
| 846 // Match 'ethis' to any TemplateThisParameter's | |
| 847 if (ethis) | |
| 848 { | |
| 849 for (size_t i = 0; i < parameters.dim; i++) | |
| 850 { | |
| 851 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 852 TemplateThisParameter ttp = tp2.isTemplateThisParameter(); | |
| 853 if (ttp) | |
| 854 { | |
| 855 MATCH m; | |
| 856 | |
| 857 Type t = new TypeIdentifier(Loc(0), ttp.ident); | |
| 858 m = ethis.type.deduceType(paramscope, t, parameters, dedtypes); | |
| 859 if (!m) | |
| 860 goto Lnomatch; | |
| 861 if (m < match) | |
| 862 match = m; // pick worst match | |
| 863 } | |
| 864 } | |
| 865 } | |
| 866 } | |
| 867 | |
| 868 // Loop through the function parameters | |
| 869 for (size_t i = 0; i < nfparams; i++) | |
| 870 { | |
| 871 /* Skip over function parameters which wound up | |
| 872 * as part of a template tuple parameter. | |
| 873 */ | |
| 874 if (i == fptupindex) | |
| 875 { | |
| 876 if (fptupindex == nfparams - 1) | |
| 877 break; | |
| 878 i += tuple_dim - 1; | |
| 879 continue; | |
| 880 } | |
| 881 | |
| 882 Argument fparam = Argument.getNth(fparameters, i); | |
| 883 | |
| 884 if (i >= nfargs) // if not enough arguments | |
| 885 { | |
| 886 if (fparam.defaultArg) | |
| 887 { | |
| 888 /* Default arguments do not participate in template argument | |
| 889 * deduction. | |
| 890 */ | |
| 891 goto Lmatch; | |
| 892 } | |
| 893 } | |
| 894 else | |
| 895 { | |
|
90
39648eb578f6
more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
87
diff
changeset
|
896 auto farg = fargs[i]; |
| 0 | 897 static if (false) { |
| 898 printf("\tfarg.type = %s\n", farg.type.toChars()); | |
| 899 printf("\tfparam.type = %s\n", fparam.type.toChars()); | |
| 900 } | |
| 901 Type argtype = farg.type; | |
| 902 | |
| 903 version (DMDV2) { | |
| 904 /* Allow string literals which are type [] to match with [dim] | |
| 905 */ | |
| 906 if (farg.op == TOKstring) | |
| 907 { | |
| 908 StringExp se = cast(StringExp)farg; | |
| 909 if (!se.committed && argtype.ty == Tarray && | |
| 910 fparam.type.toBasetype().ty == Tsarray) | |
| 911 { | |
| 912 argtype = new TypeSArray(argtype.nextOf(), new IntegerExp(se.loc, se.len, Type.tindex)); | |
| 913 argtype = argtype.semantic(se.loc, null); | |
| 914 argtype = argtype.invariantOf(); | |
| 915 } | |
| 916 } | |
| 917 } | |
| 918 | |
| 919 MATCH m; | |
| 920 m = argtype.deduceType(paramscope, fparam.type, parameters, dedtypes); | |
| 921 //printf("\tdeduceType m = %d\n", m); | |
| 922 | |
| 923 /* If no match, see if there's a conversion to a delegate | |
| 924 */ | |
| 925 if (!m && fparam.type.toBasetype().ty == Tdelegate) | |
| 926 { | |
| 927 TypeDelegate td = cast(TypeDelegate)fparam.type.toBasetype(); | |
| 928 TypeFunction tf = cast(TypeFunction)td.next; | |
| 929 | |
| 930 if (!tf.varargs && Argument.dim(tf.parameters) == 0) | |
| 931 { | |
| 932 m = farg.type.deduceType(paramscope, tf.next, parameters, dedtypes); | |
| 933 if (!m && tf.next.toBasetype().ty == Tvoid) | |
| 934 m = MATCHconvert; | |
| 935 } | |
| 936 //printf("\tm2 = %d\n", m); | |
| 937 } | |
| 938 | |
| 939 if (m) | |
| 940 { | |
| 941 if (m < match) | |
| 942 match = m; // pick worst match | |
| 943 continue; | |
| 944 } | |
| 945 } | |
| 946 | |
| 947 /* The following code for variadic arguments closely | |
| 948 * matches TypeFunction.callMatch() | |
| 949 */ | |
| 950 if (!(fvarargs == 2 && i + 1 == nfparams)) | |
| 951 goto Lnomatch; | |
| 952 | |
| 953 /* Check for match with function parameter T... | |
| 954 */ | |
| 955 Type tb = fparam.type.toBasetype(); | |
| 956 switch (tb.ty) | |
| 957 { | |
| 958 // Perhaps we can do better with this, see TypeFunction.callMatch() | |
| 959 case Tsarray: | |
| 960 { | |
| 961 TypeSArray tsa = cast(TypeSArray)tb; | |
| 962 ulong sz = tsa.dim.toInteger(); | |
| 963 if (sz != nfargs - i) | |
| 964 goto Lnomatch; | |
| 965 } | |
| 966 case Tarray: | |
| 967 { | |
| 968 TypeArray ta = cast(TypeArray)tb; | |
| 969 for (; i < nfargs; i++) | |
| 970 { | |
|
90
39648eb578f6
more Expressions work
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
87
diff
changeset
|
971 auto arg = fargs[i]; |
| 0 | 972 assert(arg); |
| 973 MATCH m; | |
| 974 /* If lazy array of delegates, | |
| 975 * convert arg(s) to delegate(s) | |
| 976 */ | |
| 977 Type tret = fparam.isLazyArray(); | |
| 978 if (tret) | |
| 979 { | |
| 980 if (ta.next.equals(arg.type)) | |
| 981 { | |
| 982 m = MATCHexact; | |
| 983 } | |
| 984 else | |
| 985 { | |
| 986 m = arg.implicitConvTo(tret); | |
| 987 if (m == MATCHnomatch) | |
| 988 { | |
| 989 if (tret.toBasetype().ty == Tvoid) | |
| 990 m = MATCHconvert; | |
| 991 } | |
| 992 } | |
| 993 } | |
| 994 else | |
| 995 { | |
| 996 m = arg.type.deduceType(paramscope, ta.next, parameters, dedtypes); | |
| 997 //m = arg.implicitConvTo(ta.next); | |
| 998 } | |
| 999 if (m == MATCHnomatch) | |
| 1000 goto Lnomatch; | |
| 1001 if (m < match) | |
| 1002 match = m; | |
| 1003 } | |
| 1004 goto Lmatch; | |
| 1005 } | |
| 1006 case Tclass: | |
| 1007 case Tident: | |
| 1008 goto Lmatch; | |
| 1009 | |
| 1010 default: | |
| 1011 goto Lnomatch; | |
| 1012 } | |
| 1013 } | |
| 1014 | |
| 1015 Lmatch: | |
| 1016 | |
| 1017 /* Fill in any missing arguments with their defaults. | |
| 1018 */ | |
| 1019 for (size_t i = nargsi; i < dedargs.dim; i++) | |
| 1020 { | |
| 1021 TemplateParameter tp2 = cast(TemplateParameter)parameters.data[i]; | |
| 1022 //printf("tp2[%d] = %s\n", i, tp2.ident.toChars()); | |
| 1023 /* For T:T*, the dedargs is the T*, dedtypes is the T | |
| 1024 * But for function templates, we really need them to match | |
| 1025 */ | |
| 1026 Object oarg = cast(Object)dedargs.data[i]; | |
| 1027 Object oded = cast(Object)dedtypes.data[i]; | |
| 1028 //printf("1dedargs[%d] = %p, dedtypes[%d] = %p\n", i, oarg, i, oded); | |
| 1029 //if (oarg) printf("oarg: %s\n", oarg.toChars()); | |
| 1030 //if (oded) printf("oded: %s\n", oded.toChars()); | |
| 1031 if (!oarg) | |
| 1032 { | |
| 1033 if (oded) | |
| 1034 { | |
| 1035 if (tp2.specialization()) | |
| 1036 { | |
| 1037 /* The specialization can work as long as afterwards | |
| 1038 * the oded == oarg | |
| 1039 */ | |
| 1040 Declaration sparam; | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1041 dedargs[i] = oded; |
| 0 | 1042 MATCH m2 = tp2.matchArg(paramscope, dedargs, i, parameters, dedtypes, &sparam, 0); |
| 1043 //printf("m2 = %d\n", m2); | |
| 1044 if (!m2) | |
| 1045 goto Lnomatch; | |
| 1046 if (m2 < match) | |
| 1047 match = m2; // pick worst match | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1048 if (dedtypes[i] !is oded) |
| 0 | 1049 error("specialization not allowed for deduced parameter %s", tp2.ident.toChars()); |
| 1050 } | |
| 1051 } | |
| 1052 else | |
| 1053 { | |
| 1054 oded = tp2.defaultArg(loc, paramscope); | |
| 1055 if (!oded) | |
| 1056 goto Lnomatch; | |
| 1057 } | |
| 1058 declareParameter(paramscope, tp2, oded); | |
|
94
3a0b150c9841
Objects -> Vector!Object iteration 1
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
90
diff
changeset
|
1059 dedargs[i] = oded; |
| 0 | 1060 } |
| 1061 } | |
| 1062 | |
| 1063 version (DMDV2) { | |
| 1064 if (constraint) | |
| 1065 { /* Check to see if constraint is satisfied. | |
| 1066 */ | |
| 1067 Expression e = constraint.syntaxCopy(); | |
| 1068 paramscope.flags |= SCOPE.SCOPEstaticif; | |
| 1069 e = e.semantic(paramscope); | |
| 1070 e = e.optimize(WANTvalue | WANTinterpret); | |
| 1071 if (e.isBool(true)) { | |
| 1072 ; | |
| 1073 } else if (e.isBool(false)) | |
| 1074 goto Lnomatch; | |
| 1075 else | |
| 1076 { | |
| 1077 e.error("constraint %s is not constant or does not evaluate to a bool", e.toChars()); | |
| 1078 } | |
| 1079 } | |
| 1080 } | |
| 1081 | |
| 1082 static if (false) { | |
| 1083 for (i = 0; i < dedargs.dim; i++) | |
| 1084 { | |
| 1085 Type t = cast(Type)dedargs.data[i]; | |
| 1086 printf("\tdedargs[%d] = %d, %s\n", i, t.dyncast(), t.toChars()); | |
| 1087 } | |
| 1088 } | |
| 1089 | |
| 1090 paramscope.pop(); | |
| 1091 //printf("\tmatch %d\n", match); | |
| 1092 return match; | |
| 1093 | |
| 1094 Lnomatch: | |
| 1095 paramscope.pop(); | |
| 1096 //printf("\tnomatch\n"); | |
| 1097 return MATCHnomatch; | |
| 1098 } | |
| 1099 | |
| 1100 /************************************************* | |
| 1101 * Given function arguments, figure out which template function | |
| 1102 * to expand, and return that function. | |
| 1103 * If no match, give error message and return null. | |
| 1104 * Input: | |
| 1105 * sc instantiation scope | |
| 1106 * loc instantiation location | |
| 1107 * targsi initial list of template arguments | |
| 1108 * ethis if !null, the 'this' pointer argument | |
| 1109 * fargs arguments to function | |
| 1110 * flags 1: do not issue error message on no match, just return null | |
| 1111 */ | |
| 1112 FuncDeclaration deduceFunctionTemplate(Scope sc, Loc loc, Objects targsi, Expression ethis, Expressions fargs, int flags = 0) | |
| 1113 { | |
| 1114 MATCH m_best = MATCHnomatch; | |
| 1115 TemplateDeclaration td_ambig = null; | |
| 1116 TemplateDeclaration td_best = null; | |
| 1117 Objects tdargs = new Objects(); | |
| 1118 TemplateInstance ti; | |
| 1119 FuncDeclaration fd; | |
| 1120 | |
| 1121 static if (false) { | |
| 1122 printf("TemplateDeclaration.deduceFunctionTemplate() %s\n", toChars()); | |
| 1123 printf(" targsi:\n"); | |
| 1124 if (targsi) | |
| 1125 { | |
| 1126 for (int i = 0; i < targsi.dim; i++) | |
| 1127 { | |
| 1128 Object arg = cast(Object)targsi.data[i]; | |
| 1129 printf("\t%s\n", arg.toChars()); | |
| 1130 } | |
| 1131 } | |
| 1132 printf(" fargs:\n"); | |
| 1133 for (int i = 0; i < fargs.dim; i++) | |
| 1134 { | |
| 1135 Expression arg = cast(Expression)fargs.data[i]; | |
| 1136 printf("\t%s %s\n", arg.type.toChars(), arg.toChars()); | |
| 1137 //printf("\tty = %d\n", arg.type.ty); | |
| 1138 } | |
| 1139 } | |
| 1140 | |
| 1141 for (TemplateDeclaration td = this; td; td = td.overnext) | |
| 1142 { | |
| 1143 if (!td.semanticRun) | |
| 1144 { | |
| 1145 error("forward reference to template %s", td.toChars()); | |
| 1146 goto Lerror; | |
| 1147 } | |
| 1148 if (!td.onemember || !td.onemember.toAlias().isFuncDeclaration()) | |
| 1149 { | |
| 1150 error("is not a function template"); | |
| 1151 goto Lerror; | |
| 1152 } | |
| 1153 | |
| 1154 MATCH m; | |
| 1155 scope Objects dedargs = new Objects(); | |
| 1156 | |
| 1157 m = td.deduceFunctionTemplateMatch(loc, targsi, ethis, fargs, dedargs); | |
| 1158 //printf("deduceFunctionTemplateMatch = %d\n", m); | |
| 1159 if (!m) // if no match | |
| 1160 continue; | |
| 1161 | |
| 1162 if (m < m_best) | |
| 1163 goto Ltd_best; | |
| 1164 if (m > m_best) | |
| 1165 goto Ltd; | |
| 1166 | |
| 1167 { | |
| 1168 // Disambiguate by picking the most specialized TemplateDeclaration | |
| 1169 MATCH c1 = td.leastAsSpecialized(td_best); | |
| 1170 MATCH c2 = td_best.leastAsSpecialized(td); | |
| 1171 //printf("c1 = %d, c2 = %d\n", c1, c2); | |
| 1172 | |
| 1173 if (c1 > c2) | |
| 1174 goto Ltd; | |
| 1175 else if (c1 < c2) | |
| 1176 goto Ltd_best; | |
| 1177 else | |
| 1178 goto Lambig; | |
| 1179 } | |
| 1180 | |
| 1181 Lambig: // td_best and td are ambiguous | |
| 1182 td_ambig = td; | |
| 1183 continue; | |
| 1184 | |
| 1185 Ltd_best: // td_best is the best match so far | |
| 1186 td_ambig = null; | |
| 1187 continue; | |
| 1188 | |
| 1189 Ltd: // td is the new best match | |
| 1190 td_ambig = null; | |
| 1191 assert(cast(size_t)cast(void*)td.scope_ > 0x10000); | |
| 1192 td_best = td; | |
| 1193 m_best = m; | |
| 1194 tdargs.setDim(dedargs.dim); | |
| 1195 memcpy(tdargs.data, dedargs.data, tdargs.dim * (void*).sizeof); | |
| 1196 continue; | |
| 1197 } | |
| 1198 if (!td_best) | |
| 1199 { | |
| 1200 if (!(flags & 1)) | |
| 1201 error(loc, "does not match any function template declaration"); | |
| 1202 goto Lerror; | |
| 1203 } | |
| 1204 if (td_ambig) | |
| 1205 { | |
| 1206 error(loc, "matches more than one function template declaration:\n %s\nand:\n %s", | |
| 1207 td_best.toChars(), td_ambig.toChars()); | |
| 1208 } | |
| 1209 | |
| 1210 /* The best match is td_best with arguments tdargs. | |
| 1211 * Now instantiate the template. | |
| 1212 */ | |
| 1213 assert(cast(size_t)cast(void*)td_best.scope_ > 0x10000); | |
| 1214 ti = new TemplateInstance(loc, td_best, tdargs); | |
| 1215 ti.semantic(sc); | |
| 1216 fd = ti.toAlias().isFuncDeclaration(); | |
| 1217 if (!fd) | |
| 1218 goto Lerror; | |
| 1219 return fd; | |
| 1220 | |
| 1221 Lerror: | |
| 1222 /// version (DMDV2) { | |
| 1223 if (!(flags & 1)) | |
| 1224 /// } | |
| 1225 { | |
| 1226 HdrGenState hgs; | |
| 1227 | |
| 1228 scope OutBuffer bufa = new OutBuffer(); | |
| 1229 Objects args = targsi; | |
| 1230 if (args) | |
| 1231 { | |
| 1232 for (int i = 0; i < args.dim; i++) | |
| 1233 { | |
| 1234 if (i) | |
| 1235 bufa.writeByte(','); | |
| 1236 Object oarg = cast(Object)args.data[i]; | |
| 1237 ObjectToCBuffer(bufa, &hgs, oarg); | |
| 1238 } | |
| 1239 } | |
| 1240 | |
| 1241 scope OutBuffer buf = new OutBuffer(); | |
| 1242 argExpTypesToCBuffer(buf, fargs, &hgs); | |
| 1243 error(loc, "cannot deduce template function from argument types !(%s)(%s)", bufa.toChars(), buf.toChars()); | |
| 1244 } | |
| 1245 return null; | |
| 1246 } | |
| 1247 | |
| 1248 /************************************************** | |
| 1249 * Declare template parameter tp with value o, and install it in the scope sc. | |
| 1250 */ | |
| 1251 void declareParameter(Scope sc, TemplateParameter tp, Object o) | |
| 1252 { | |
| 1253 //printf("TemplateDeclaration.declareParameter('%s', o = %p)\n", tp.ident.toChars(), o); | |
| 1254 | |
| 1255 Type targ = isType(o); | |
| 1256 Expression ea = isExpression(o); | |
| 1257 Dsymbol sa = isDsymbol(o); | |
| 1258 Tuple va = isTuple(o); | |
| 1259 | |
| 1260 Dsymbol s; | |
| 1261 | |
| 1262 // See if tp.ident already exists with a matching definition | |
| 1263 Dsymbol scopesym; | |
| 1264 s = sc.search(loc, tp.ident, &scopesym); | |
| 1265 if (s && scopesym == sc.scopesym) | |
| 1266 { | |
| 1267 TupleDeclaration td = s.isTupleDeclaration(); | |
| 1268 if (va && td) | |
| 1269 { | |
| 1270 Tuple tup = new Tuple(); | |
| 1271 assert(false); // < not implemented | |
| 1272 ///tup.objects = *td.objects; | |
| 1273 if (match(va, tup, this, sc)) | |
| 1274 { | |
| 1275 return; | |
| 1276 } | |
| 1277 } | |
| 1278 } | |
| 1279 | |
| 1280 if (targ) | |
| 1281 { | |
| 1282 //printf("type %s\n", targ.toChars()); | |
| 1283 s = new AliasDeclaration(Loc(0), tp.ident, targ); | |
| 1284 } | |
| 1285 else if (sa) | |
| 1286 { | |
| 1287 //printf("Alias %s %s;\n", sa.ident.toChars(), tp.ident.toChars()); | |
| 1288 s = new AliasDeclaration(Loc(0), tp.ident, sa); | |
| 1289 } | |
| 1290 else if (ea) | |
| 1291 { | |
| 1292 // tdtypes.data[i] always matches ea here | |
| 1293 Initializer init = new ExpInitializer(loc, ea); | |
| 1294 TemplateValueParameter tvp = tp.isTemplateValueParameter(); | |
| 1295 | |
| 1296 Type t = tvp ? tvp.valType : null; | |
| 1297 | |
| 1298 VarDeclaration v = new VarDeclaration(loc, t, tp.ident, init); | |
| 1299 v.storage_class = STCmanifest; | |
| 1300 s = v; | |
| 1301 } | |
| 1302 else if (va) | |
| 1303 { | |
| 1304 //printf("\ttuple\n"); | |
| 1305 s = new TupleDeclaration(loc, tp.ident, va.objects); | |
| 1306 } | |
| 1307 else | |
| 1308 { | |
| 1309 debug writefln(o.toString()); | |
| 1310 assert(0); | |
| 1311 } | |
| 1312 | |
| 1313 if (!sc.insert(s)) | |
| 1314 error("declaration %s is already defined", tp.ident.toChars()); | |
| 1315 | |
| 1316 s.semantic(sc); | |
| 1317 } | |
| 1318 | |
| 72 | 1319 override TemplateDeclaration isTemplateDeclaration() { return this; } |
| 0 | 1320 |
| 1321 TemplateTupleParameter isVariadic() | |
| 1322 { | |
| 1323 return .isVariadic(parameters); | |
| 1324 } | |
| 1325 | |
| 63 | 1326 /*********************************** |
| 1327 * We can overload templates. | |
| 1328 */ | |
| 72 | 1329 override bool isOverloadable() |
| 0 | 1330 { |
| 63 | 1331 return 1; |
| 0 | 1332 } |
| 72 | 1333 } |