Mercurial > projects > ldc
annotate dmd/class.c @ 73:b706170e24a9 trunk
[svn r77] Fixed foreach on slice.
Fixed some nested function problems when accessing outer function parameters.
Major changes to handling of structs.
Initial support for unions.
Probably more...
| author | lindquist |
|---|---|
| date | Wed, 31 Oct 2007 03:11:32 +0100 |
| parents | 3cfcb944304e |
| children | 5acec6b2eef8 |
| rev | line source |
|---|---|
| 1 | 1 |
| 2 // Compiler implementation of the D programming language | |
|
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3 // Copyright (c) 1999-2007 by Digital Mars |
| 1 | 4 // All Rights Reserved |
| 5 // written by Walter Bright | |
| 6 // http://www.digitalmars.com | |
| 7 // License for redistribution is by either the Artistic License | |
| 8 // in artistic.txt, or the GNU General Public License in gnu.txt. | |
| 9 // See the included readme.txt for details. | |
| 10 | |
| 11 #include <stdio.h> | |
| 12 #include <stdlib.h> | |
| 13 #include <assert.h> | |
| 14 | |
| 15 #include "root.h" | |
| 16 #include "mem.h" | |
| 17 | |
| 18 #include "enum.h" | |
| 19 #include "init.h" | |
| 20 #include "attrib.h" | |
| 21 #include "declaration.h" | |
| 22 #include "aggregate.h" | |
| 23 #include "id.h" | |
| 24 #include "mtype.h" | |
| 25 #include "scope.h" | |
| 26 #include "module.h" | |
| 27 #include "expression.h" | |
| 28 #include "statement.h" | |
| 29 | |
| 30 /********************************* ClassDeclaration ****************************/ | |
| 31 | |
| 32 ClassDeclaration *ClassDeclaration::classinfo; | |
| 33 ClassDeclaration *ClassDeclaration::object; | |
| 34 | |
| 35 ClassDeclaration::ClassDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses) | |
| 36 : AggregateDeclaration(loc, id) | |
| 37 { | |
| 38 static char msg[] = "only object.d can define this reserved class name"; | |
| 39 | |
| 40 if (baseclasses) | |
| 41 this->baseclasses = *baseclasses; | |
| 42 baseClass = NULL; | |
| 43 | |
| 44 interfaces_dim = 0; | |
| 45 interfaces = NULL; | |
| 46 | |
| 47 vtblInterfaces = NULL; | |
| 48 | |
| 49 //printf("ClassDeclaration(%s), dim = %d\n", id->toChars(), this->baseclasses.dim); | |
| 50 | |
| 51 // For forward references | |
| 52 type = new TypeClass(this); | |
| 53 handle = type; | |
| 54 | |
| 55 ctor = NULL; | |
| 56 defaultCtor = NULL; | |
| 57 staticCtor = NULL; | |
| 58 staticDtor = NULL; | |
| 59 | |
| 60 vtblsym = NULL; | |
| 61 vclassinfo = NULL; | |
| 62 | |
| 63 if (id) | |
| 64 { // Look for special class names | |
| 65 | |
| 66 if (id == Id::__sizeof || id == Id::alignof || id == Id::mangleof) | |
| 67 error("illegal class name"); | |
| 68 | |
| 69 // BUG: What if this is the wrong TypeInfo, i.e. it is nested? | |
| 70 if (id->toChars()[0] == 'T') | |
| 71 { | |
| 72 if (id == Id::TypeInfo) | |
| 73 { if (Type::typeinfo) | |
| 74 Type::typeinfo->error("%s", msg); | |
| 75 Type::typeinfo = this; | |
| 76 } | |
| 77 | |
| 78 if (id == Id::TypeInfo_Class) | |
| 79 { if (Type::typeinfoclass) | |
| 80 Type::typeinfoclass->error("%s", msg); | |
| 81 Type::typeinfoclass = this; | |
| 82 } | |
| 83 | |
| 84 if (id == Id::TypeInfo_Interface) | |
| 85 { if (Type::typeinfointerface) | |
| 86 Type::typeinfointerface->error("%s", msg); | |
| 87 Type::typeinfointerface = this; | |
| 88 } | |
| 89 | |
| 90 if (id == Id::TypeInfo_Struct) | |
| 91 { if (Type::typeinfostruct) | |
| 92 Type::typeinfostruct->error("%s", msg); | |
| 93 Type::typeinfostruct = this; | |
| 94 } | |
| 95 | |
| 96 if (id == Id::TypeInfo_Typedef) | |
| 97 { if (Type::typeinfotypedef) | |
| 98 Type::typeinfotypedef->error("%s", msg); | |
| 99 Type::typeinfotypedef = this; | |
| 100 } | |
| 101 | |
| 102 if (id == Id::TypeInfo_Pointer) | |
| 103 { if (Type::typeinfopointer) | |
| 104 Type::typeinfopointer->error("%s", msg); | |
| 105 Type::typeinfopointer = this; | |
| 106 } | |
| 107 | |
| 108 if (id == Id::TypeInfo_Array) | |
| 109 { if (Type::typeinfoarray) | |
| 110 Type::typeinfoarray->error("%s", msg); | |
| 111 Type::typeinfoarray = this; | |
| 112 } | |
| 113 | |
| 114 if (id == Id::TypeInfo_StaticArray) | |
| 115 { //if (Type::typeinfostaticarray) | |
| 116 //Type::typeinfostaticarray->error("%s", msg); | |
| 117 Type::typeinfostaticarray = this; | |
| 118 } | |
| 119 | |
| 120 if (id == Id::TypeInfo_AssociativeArray) | |
| 121 { if (Type::typeinfoassociativearray) | |
| 122 Type::typeinfoassociativearray->error("%s", msg); | |
| 123 Type::typeinfoassociativearray = this; | |
| 124 } | |
| 125 | |
| 126 if (id == Id::TypeInfo_Enum) | |
| 127 { if (Type::typeinfoenum) | |
| 128 Type::typeinfoenum->error("%s", msg); | |
| 129 Type::typeinfoenum = this; | |
| 130 } | |
| 131 | |
| 132 if (id == Id::TypeInfo_Function) | |
| 133 { if (Type::typeinfofunction) | |
| 134 Type::typeinfofunction->error("%s", msg); | |
| 135 Type::typeinfofunction = this; | |
| 136 } | |
| 137 | |
| 138 if (id == Id::TypeInfo_Delegate) | |
| 139 { if (Type::typeinfodelegate) | |
| 140 Type::typeinfodelegate->error("%s", msg); | |
| 141 Type::typeinfodelegate = this; | |
| 142 } | |
| 143 | |
| 144 if (id == Id::TypeInfo_Tuple) | |
| 145 { if (Type::typeinfotypelist) | |
| 146 Type::typeinfotypelist->error("%s", msg); | |
| 147 Type::typeinfotypelist = this; | |
| 148 } | |
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149 |
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150 #if V2 |
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151 if (id == Id::TypeInfo_Const) |
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152 { if (Type::typeinfoconst) |
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153 Type::typeinfoconst->error("%s", msg); |
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154 Type::typeinfoconst = this; |
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155 } |
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156 |
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157 if (id == Id::TypeInfo_Invariant) |
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158 { if (Type::typeinfoinvariant) |
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159 Type::typeinfoinvariant->error("%s", msg); |
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160 Type::typeinfoinvariant = this; |
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161 } |
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162 #endif |
| 1 | 163 } |
| 164 | |
| 165 if (id == Id::Object) | |
| 166 { if (object) | |
| 167 object->error("%s", msg); | |
| 168 object = this; | |
| 169 } | |
| 170 | |
| 171 if (id == Id::ClassInfo) | |
| 172 { if (classinfo) | |
| 173 classinfo->error("%s", msg); | |
| 174 classinfo = this; | |
| 175 } | |
| 176 | |
| 177 if (id == Id::ModuleInfo) | |
| 178 { if (Module::moduleinfo) | |
| 179 Module::moduleinfo->error("%s", msg); | |
| 180 Module::moduleinfo = this; | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 com = 0; | |
| 185 isauto = 0; | |
| 186 isabstract = 0; | |
| 187 isnested = 0; | |
| 188 vthis = NULL; | |
| 189 } | |
| 190 | |
| 191 Dsymbol *ClassDeclaration::syntaxCopy(Dsymbol *s) | |
| 192 { | |
| 193 ClassDeclaration *cd; | |
| 194 | |
| 195 //printf("ClassDeclaration::syntaxCopy('%s')\n", toChars()); | |
| 196 if (s) | |
| 197 cd = (ClassDeclaration *)s; | |
| 198 else | |
| 199 cd = new ClassDeclaration(loc, ident, NULL); | |
| 200 | |
| 201 cd->storage_class |= storage_class; | |
| 202 | |
| 203 cd->baseclasses.setDim(this->baseclasses.dim); | |
| 204 for (int i = 0; i < cd->baseclasses.dim; i++) | |
| 205 { | |
| 206 BaseClass *b = (BaseClass *)this->baseclasses.data[i]; | |
| 207 BaseClass *b2 = new BaseClass(b->type->syntaxCopy(), b->protection); | |
| 208 cd->baseclasses.data[i] = b2; | |
| 209 } | |
| 210 | |
| 211 ScopeDsymbol::syntaxCopy(cd); | |
| 212 return cd; | |
| 213 } | |
| 214 | |
| 215 void ClassDeclaration::semantic(Scope *sc) | |
| 216 { int i; | |
| 217 unsigned offset; | |
| 218 | |
| 219 //printf("ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this); | |
| 220 //printf("\tparent = %p, '%s'\n", sc->parent, sc->parent ? sc->parent->toChars() : ""); | |
| 221 //printf("sc->stc = %x\n", sc->stc); | |
| 222 | |
| 223 //{ static int n; if (++n == 20) *(char*)0=0; } | |
| 224 | |
| 225 if (!ident) // if anonymous class | |
| 226 { char *id = "__anonclass"; | |
| 227 | |
| 228 ident = Identifier::generateId(id); | |
| 229 } | |
| 230 | |
| 231 if (!scope) | |
| 232 { | |
| 233 if (!parent && sc->parent && !sc->parent->isModule()) | |
| 234 parent = sc->parent; | |
| 235 | |
| 236 type = type->semantic(loc, sc); | |
| 237 handle = handle->semantic(loc, sc); | |
| 238 } | |
| 239 if (!members) // if forward reference | |
| 240 { //printf("\tclass '%s' is forward referenced\n", toChars()); | |
| 241 return; | |
| 242 } | |
| 243 if (symtab) | |
| 244 { if (!scope) | |
| 245 { //printf("\tsemantic for '%s' is already completed\n", toChars()); | |
| 246 return; // semantic() already completed | |
| 247 } | |
| 248 } | |
| 249 else | |
| 250 symtab = new DsymbolTable(); | |
| 251 | |
| 252 Scope *scx = NULL; | |
| 253 if (scope) | |
| 254 { sc = scope; | |
| 255 scx = scope; // save so we don't make redundant copies | |
| 256 scope = NULL; | |
| 257 } | |
| 258 #ifdef IN_GCC | |
| 259 methods.setDim(0); | |
| 260 #endif | |
| 261 | |
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262 if (sc->stc & STCdeprecated) |
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263 { //printf("test1: %s is deprecated\n", toChars()); |
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264 isdeprecated = 1; |
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265 } |
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266 |
| 1 | 267 // Expand any tuples in baseclasses[] |
| 268 for (i = 0; i < baseclasses.dim; ) | |
| 269 { BaseClass *b = (BaseClass *)baseclasses.data[i]; | |
| 270 b->type = b->type->semantic(loc, sc); | |
| 271 Type *tb = b->type->toBasetype(); | |
| 272 | |
| 273 if (tb->ty == Ttuple) | |
| 274 { TypeTuple *tup = (TypeTuple *)tb; | |
| 275 enum PROT protection = b->protection; | |
| 276 baseclasses.remove(i); | |
| 277 size_t dim = Argument::dim(tup->arguments); | |
| 278 for (size_t j = 0; j < dim; j++) | |
| 279 { Argument *arg = Argument::getNth(tup->arguments, j); | |
| 280 b = new BaseClass(arg->type, protection); | |
| 281 baseclasses.insert(i + j, b); | |
| 282 } | |
| 283 } | |
| 284 else | |
| 285 i++; | |
| 286 } | |
| 287 | |
| 288 // See if there's a base class as first in baseclasses[] | |
| 289 if (baseclasses.dim) | |
| 290 { TypeClass *tc; | |
| 291 BaseClass *b; | |
| 292 Type *tb; | |
| 293 | |
| 294 b = (BaseClass *)baseclasses.data[0]; | |
| 295 //b->type = b->type->semantic(loc, sc); | |
| 296 tb = b->type->toBasetype(); | |
| 297 if (tb->ty != Tclass) | |
| 298 { error("base type must be class or interface, not %s", b->type->toChars()); | |
| 299 baseclasses.remove(0); | |
| 300 } | |
| 301 else | |
| 302 { | |
| 303 tc = (TypeClass *)(tb); | |
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304 if (tc->sym->isDeprecated()) |
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305 { |
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306 if (!isDeprecated()) |
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307 { |
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308 // Deriving from deprecated class makes this one deprecated too |
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309 isdeprecated = 1; |
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310 |
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311 tc->checkDeprecated(loc, sc); |
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312 } |
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313 } |
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314 |
| 1 | 315 if (tc->sym->isInterfaceDeclaration()) |
| 316 ; | |
| 317 else | |
| 318 { | |
| 319 for (ClassDeclaration *cdb = tc->sym; cdb; cdb = cdb->baseClass) | |
| 320 { | |
| 321 if (cdb == this) | |
| 322 { | |
| 323 error("circular inheritance"); | |
| 324 baseclasses.remove(0); | |
| 325 goto L7; | |
| 326 } | |
| 327 } | |
| 328 if (!tc->sym->symtab || tc->sym->scope || tc->sym->sizeok == 0) | |
| 329 { | |
| 330 //error("forward reference of base class %s", baseClass->toChars()); | |
| 331 // Forward reference of base class, try again later | |
| 332 //printf("\ttry later, forward reference of base class %s\n", tc->sym->toChars()); | |
| 333 scope = scx ? scx : new Scope(*sc); | |
| 334 scope->setNoFree(); | |
| 335 scope->module->addDeferredSemantic(this); | |
| 336 return; | |
| 337 } | |
| 338 else | |
| 339 { baseClass = tc->sym; | |
| 340 b->base = baseClass; | |
| 341 } | |
| 342 L7: ; | |
| 343 } | |
| 344 } | |
| 345 } | |
| 346 | |
| 347 // Treat the remaining entries in baseclasses as interfaces | |
| 348 // Check for errors, handle forward references | |
| 349 for (i = (baseClass ? 1 : 0); i < baseclasses.dim; ) | |
| 350 { TypeClass *tc; | |
| 351 BaseClass *b; | |
| 352 Type *tb; | |
| 353 | |
| 354 b = (BaseClass *)baseclasses.data[i]; | |
| 355 b->type = b->type->semantic(loc, sc); | |
| 356 tb = b->type->toBasetype(); | |
| 357 if (tb->ty == Tclass) | |
| 358 tc = (TypeClass *)tb; | |
| 359 else | |
| 360 tc = NULL; | |
| 361 if (!tc || !tc->sym->isInterfaceDeclaration()) | |
| 362 { | |
| 363 error("base type must be interface, not %s", b->type->toChars()); | |
| 364 baseclasses.remove(i); | |
| 365 continue; | |
| 366 } | |
| 367 else | |
| 368 { | |
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369 if (tc->sym->isDeprecated()) |
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370 { |
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371 if (!isDeprecated()) |
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372 { |
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373 // Deriving from deprecated class makes this one deprecated too |
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374 isdeprecated = 1; |
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375 |
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376 tc->checkDeprecated(loc, sc); |
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377 } |
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378 } |
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379 |
| 1 | 380 // Check for duplicate interfaces |
| 381 for (size_t j = (baseClass ? 1 : 0); j < i; j++) | |
| 382 { | |
| 383 BaseClass *b2 = (BaseClass *)baseclasses.data[j]; | |
| 384 if (b2->base == tc->sym) | |
| 385 error("inherits from duplicate interface %s", b2->base->toChars()); | |
| 386 } | |
| 387 | |
| 388 b->base = tc->sym; | |
| 389 if (!b->base->symtab || b->base->scope) | |
| 390 { | |
| 391 //error("forward reference of base class %s", baseClass->toChars()); | |
| 392 // Forward reference of base, try again later | |
| 393 //printf("\ttry later, forward reference of base %s\n", baseClass->toChars()); | |
| 394 scope = scx ? scx : new Scope(*sc); | |
| 395 scope->setNoFree(); | |
| 396 scope->module->addDeferredSemantic(this); | |
| 397 return; | |
| 398 } | |
| 399 } | |
| 400 i++; | |
| 401 } | |
| 402 | |
| 403 | |
| 404 // If no base class, and this is not an Object, use Object as base class | |
| 405 if (!baseClass && ident != Id::Object) | |
| 406 { | |
| 407 // BUG: what if Object is redefined in an inner scope? | |
| 408 Type *tbase = new TypeIdentifier(0, Id::Object); | |
| 409 BaseClass *b; | |
| 410 TypeClass *tc; | |
| 411 Type *bt; | |
| 412 | |
| 413 if (!object) | |
| 414 { | |
| 415 error("missing or corrupt object.d"); | |
| 416 fatal(); | |
| 417 } | |
| 418 bt = tbase->semantic(loc, sc)->toBasetype(); | |
| 419 b = new BaseClass(bt, PROTpublic); | |
| 420 baseclasses.shift(b); | |
| 421 assert(b->type->ty == Tclass); | |
| 422 tc = (TypeClass *)(b->type); | |
| 423 baseClass = tc->sym; | |
| 424 assert(!baseClass->isInterfaceDeclaration()); | |
| 425 b->base = baseClass; | |
| 426 } | |
| 427 | |
| 428 interfaces_dim = baseclasses.dim; | |
| 429 interfaces = (BaseClass **)baseclasses.data; | |
| 430 | |
| 431 | |
| 432 if (baseClass) | |
| 433 { | |
| 434 if (baseClass->storage_class & STCfinal) | |
| 435 error("cannot inherit from final class %s", baseClass->toChars()); | |
| 436 | |
| 437 interfaces_dim--; | |
| 438 interfaces++; | |
| 439 | |
| 440 // Copy vtbl[] from base class | |
| 441 vtbl.setDim(baseClass->vtbl.dim); | |
| 442 memcpy(vtbl.data, baseClass->vtbl.data, sizeof(void *) * vtbl.dim); | |
| 443 | |
| 444 // Inherit properties from base class | |
| 445 com = baseClass->isCOMclass(); | |
| 446 isauto = baseClass->isauto; | |
| 447 vthis = baseClass->vthis; | |
| 448 } | |
| 449 else | |
| 450 { | |
| 451 // No base class, so this is the root of the class hierarchy | |
| 452 vtbl.setDim(0); | |
| 453 vtbl.push(this); // leave room for classinfo as first member | |
| 454 } | |
| 455 | |
| 456 protection = sc->protection; | |
| 457 storage_class |= sc->stc; | |
| 458 | |
| 459 if (sizeok == 0) | |
| 460 { | |
| 461 interfaceSemantic(sc); | |
| 462 | |
| 463 for (i = 0; i < members->dim; i++) | |
| 464 { | |
| 465 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 466 s->addMember(sc, this, 1); | |
| 467 } | |
| 468 | |
| 469 /* If this is a nested class, add the hidden 'this' | |
| 470 * member which is a pointer to the enclosing scope. | |
| 471 */ | |
| 472 if (vthis) // if inheriting from nested class | |
| 473 { // Use the base class's 'this' member | |
| 474 isnested = 1; | |
| 475 if (storage_class & STCstatic) | |
| 476 error("static class cannot inherit from nested class %s", baseClass->toChars()); | |
| 477 if (toParent2() != baseClass->toParent2()) | |
| 478 error("super class %s is nested within %s, not %s", | |
| 479 baseClass->toChars(), | |
| 480 baseClass->toParent2()->toChars(), | |
| 481 toParent2()->toChars()); | |
| 482 } | |
| 483 else if (!(storage_class & STCstatic)) | |
| 484 { Dsymbol *s = toParent2(); | |
| 485 if (s) | |
| 486 { | |
| 487 ClassDeclaration *cd = s->isClassDeclaration(); | |
| 488 FuncDeclaration *fd = s->isFuncDeclaration(); | |
| 489 | |
| 490 | |
| 491 if (cd || fd) | |
| 492 { isnested = 1; | |
| 493 Type *t; | |
| 494 if (cd) | |
| 495 t = cd->type; | |
| 496 else if (fd) | |
| 497 { AggregateDeclaration *ad = fd->isMember2(); | |
| 498 if (ad) | |
| 499 t = ad->handle; | |
| 500 else | |
| 501 { | |
| 502 t = new TypePointer(Type::tvoid); | |
| 503 t = t->semantic(0, sc); | |
| 504 } | |
| 505 } | |
| 506 else | |
| 507 assert(0); | |
| 508 assert(!vthis); | |
| 509 vthis = new ThisDeclaration(t); | |
| 510 members->push(vthis); | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 if (storage_class & (STCauto | STCscope)) | |
| 517 isauto = 1; | |
| 518 if (storage_class & STCabstract) | |
| 519 isabstract = 1; | |
| 520 | |
| 521 sc = sc->push(this); | |
| 522 sc->stc &= ~(STCfinal | STCauto | STCscope | STCstatic | | |
| 523 STCabstract | STCdeprecated); | |
| 524 sc->parent = this; | |
| 525 sc->inunion = 0; | |
| 526 | |
| 527 if (isCOMclass()) | |
| 528 sc->linkage = LINKwindows; | |
| 529 sc->protection = PROTpublic; | |
| 530 sc->explicitProtection = 0; | |
| 531 sc->structalign = 8; | |
| 532 structalign = sc->structalign; | |
| 533 if (baseClass) | |
| 534 { sc->offset = baseClass->structsize; | |
| 535 alignsize = baseClass->alignsize; | |
| 536 // if (isnested) | |
| 537 // sc->offset += PTRSIZE; // room for uplevel context pointer | |
| 538 } | |
| 539 else | |
| 540 { sc->offset = 8; // allow room for vptr[] and monitor | |
| 541 alignsize = 4; | |
| 542 } | |
| 543 structsize = sc->offset; | |
| 544 Scope scsave = *sc; | |
| 545 int members_dim = members->dim; | |
| 546 sizeok = 0; | |
| 547 for (i = 0; i < members_dim; i++) | |
| 548 { | |
| 549 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 550 s->semantic(sc); | |
| 551 } | |
| 552 | |
| 553 if (sizeok == 2) | |
| 554 { // semantic() failed because of forward references. | |
| 555 // Unwind what we did, and defer it for later | |
| 556 fields.setDim(0); | |
| 557 structsize = 0; | |
| 558 alignsize = 0; | |
| 559 structalign = 0; | |
| 560 | |
| 561 sc = sc->pop(); | |
| 562 | |
| 563 scope = scx ? scx : new Scope(*sc); | |
| 564 scope->setNoFree(); | |
| 565 scope->module->addDeferredSemantic(this); | |
| 566 | |
| 567 //printf("\tsemantic('%s') failed\n", toChars()); | |
| 568 return; | |
| 569 } | |
| 570 | |
| 571 //printf("\tsemantic('%s') successful\n", toChars()); | |
| 572 | |
| 573 structsize = sc->offset; | |
| 574 //members->print(); | |
| 575 | |
| 576 /* Look for special member functions. | |
| 577 * They must be in this class, not in a base class. | |
| 578 */ | |
| 579 ctor = (CtorDeclaration *)search(0, Id::ctor, 0); | |
| 580 if (ctor && ctor->toParent() != this) | |
| 581 ctor = NULL; | |
| 582 | |
| 583 // dtor = (DtorDeclaration *)search(Id::dtor, 0); | |
| 584 // if (dtor && dtor->toParent() != this) | |
| 585 // dtor = NULL; | |
| 586 | |
| 587 // inv = (InvariantDeclaration *)search(Id::classInvariant, 0); | |
| 588 // if (inv && inv->toParent() != this) | |
| 589 // inv = NULL; | |
| 590 | |
| 591 // Can be in base class | |
| 592 aggNew = (NewDeclaration *)search(0, Id::classNew, 0); | |
| 593 aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); | |
| 594 | |
| 595 // If this class has no constructor, but base class does, create | |
| 596 // a constructor: | |
| 597 // this() { } | |
| 598 if (!ctor && baseClass && baseClass->ctor) | |
| 599 { | |
| 600 //printf("Creating default this(){} for class %s\n", toChars()); | |
| 601 ctor = new CtorDeclaration(0, 0, NULL, 0); | |
| 602 ctor->fbody = new CompoundStatement(0, new Statements()); | |
| 603 members->push(ctor); | |
| 604 ctor->addMember(sc, this, 1); | |
|
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605 *sc = scsave; // why? What about sc->nofree? |
| 1 | 606 sc->offset = structsize; |
| 607 ctor->semantic(sc); | |
| 608 defaultCtor = ctor; | |
| 609 } | |
| 610 | |
| 611 #if 0 | |
| 612 if (baseClass) | |
| 613 { if (!aggDelete) | |
| 614 aggDelete = baseClass->aggDelete; | |
| 615 if (!aggNew) | |
| 616 aggNew = baseClass->aggNew; | |
| 617 } | |
| 618 #endif | |
| 619 | |
| 620 // Allocate instance of each new interface | |
| 621 for (i = 0; i < vtblInterfaces->dim; i++) | |
| 622 { | |
| 623 BaseClass *b = (BaseClass *)vtblInterfaces->data[i]; | |
| 624 unsigned thissize = PTRSIZE; | |
| 625 | |
| 626 alignmember(structalign, thissize, &sc->offset); | |
| 627 assert(b->offset == 0); | |
| 628 b->offset = sc->offset; | |
| 629 | |
| 630 // Take care of single inheritance offsets | |
| 631 while (b->baseInterfaces_dim) | |
| 632 { | |
| 633 b = &b->baseInterfaces[0]; | |
| 634 b->offset = sc->offset; | |
| 635 } | |
| 636 | |
| 637 sc->offset += thissize; | |
| 638 if (alignsize < thissize) | |
| 639 alignsize = thissize; | |
| 640 } | |
| 641 structsize = sc->offset; | |
| 642 sizeok = 1; | |
| 643 Module::dprogress++; | |
| 644 | |
| 645 | |
| 646 sc->pop(); | |
| 647 | |
| 648 #if 0 // Do not call until toObjfile() because of forward references | |
| 649 // Fill in base class vtbl[]s | |
| 650 for (i = 0; i < vtblInterfaces->dim; i++) | |
| 651 { | |
| 652 BaseClass *b = (BaseClass *)vtblInterfaces->data[i]; | |
| 653 | |
| 654 //b->fillVtbl(this, &b->vtbl, 1); | |
| 655 } | |
| 656 #endif | |
| 657 //printf("-ClassDeclaration::semantic(%s), type = %p\n", toChars(), type); | |
| 658 } | |
| 659 | |
| 660 void ClassDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 661 { | |
| 662 if (!isAnonymous()) | |
| 663 { | |
| 664 buf->printf("%s ", kind()); | |
| 665 buf->writestring(toChars()); | |
| 666 if (baseclasses.dim) | |
| 667 buf->writestring(" : "); | |
| 668 } | |
| 669 for (int i = 0; i < baseclasses.dim; i++) | |
| 670 { | |
| 671 BaseClass *b = (BaseClass *)baseclasses.data[i]; | |
| 672 | |
| 673 if (i) | |
| 674 buf->writeByte(','); | |
| 675 //buf->writestring(b->base->ident->toChars()); | |
| 676 b->type->toCBuffer(buf, NULL, hgs); | |
| 677 } | |
| 678 buf->writenl(); | |
| 679 buf->writeByte('{'); | |
| 680 buf->writenl(); | |
| 681 for (int i = 0; i < members->dim; i++) | |
| 682 { | |
| 683 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 684 | |
| 685 buf->writestring(" "); | |
| 686 s->toCBuffer(buf, hgs); | |
| 687 } | |
| 688 buf->writestring("}"); | |
| 689 buf->writenl(); | |
| 690 } | |
| 691 | |
| 692 #if 0 | |
| 693 void ClassDeclaration::defineRef(Dsymbol *s) | |
| 694 { | |
| 695 ClassDeclaration *cd; | |
| 696 | |
| 697 AggregateDeclaration::defineRef(s); | |
| 698 cd = s->isClassDeclaration(); | |
| 699 baseType = cd->baseType; | |
| 700 cd->baseType = NULL; | |
| 701 } | |
| 702 #endif | |
| 703 | |
| 704 /********************************************* | |
| 705 * Determine if 'this' is a base class of cd. | |
| 706 * This is used to detect circular inheritance only. | |
| 707 */ | |
| 708 | |
| 709 int ClassDeclaration::isBaseOf2(ClassDeclaration *cd) | |
| 710 { | |
| 711 if (!cd) | |
| 712 return 0; | |
| 713 //printf("ClassDeclaration::isBaseOf2(this = '%s', cd = '%s')\n", toChars(), cd->toChars()); | |
| 714 for (int i = 0; i < cd->baseclasses.dim; i++) | |
| 715 { BaseClass *b = (BaseClass *)cd->baseclasses.data[i]; | |
| 716 | |
| 717 if (b->base == this || isBaseOf2(b->base)) | |
| 718 return 1; | |
| 719 } | |
| 720 return 0; | |
| 721 } | |
| 722 | |
| 723 /******************************************* | |
| 724 * Determine if 'this' is a base class of cd. | |
| 725 */ | |
| 726 | |
| 727 int ClassDeclaration::isBaseOf(ClassDeclaration *cd, int *poffset) | |
| 728 { | |
| 729 //printf("ClassDeclaration::isBaseOf(this = '%s', cd = '%s')\n", toChars(), cd->toChars()); | |
| 730 if (poffset) | |
| 731 *poffset = 0; | |
| 732 while (cd) | |
| 733 { | |
| 734 if (this == cd->baseClass) | |
| 735 return 1; | |
| 736 | |
| 737 /* cd->baseClass might not be set if cd is forward referenced. | |
| 738 */ | |
| 739 if (!cd->baseClass && cd->baseclasses.dim && !cd->isInterfaceDeclaration()) | |
| 740 { | |
| 741 cd->error("base class is forward referenced by %s", toChars()); | |
| 742 } | |
| 743 | |
| 744 cd = cd->baseClass; | |
| 745 } | |
| 746 return 0; | |
| 747 } | |
| 748 | |
| 749 Dsymbol *ClassDeclaration::search(Loc loc, Identifier *ident, int flags) | |
| 750 { | |
| 751 Dsymbol *s; | |
| 752 | |
| 753 //printf("%s.ClassDeclaration::search('%s')\n", toChars(), ident->toChars()); | |
| 754 if (scope) | |
| 755 semantic(scope); | |
| 756 | |
| 757 if (!members || !symtab || scope) | |
| 758 { error("is forward referenced when looking for '%s'", ident->toChars()); | |
| 759 //*(char*)0=0; | |
| 760 return NULL; | |
| 761 } | |
| 762 | |
| 763 s = ScopeDsymbol::search(loc, ident, flags); | |
| 764 if (!s) | |
| 765 { | |
| 766 // Search bases classes in depth-first, left to right order | |
| 767 | |
| 768 int i; | |
| 769 | |
| 770 for (i = 0; i < baseclasses.dim; i++) | |
| 771 { | |
| 772 BaseClass *b = (BaseClass *)baseclasses.data[i]; | |
| 773 | |
| 774 if (b->base) | |
| 775 { | |
| 776 if (!b->base->symtab) | |
| 777 error("base %s is forward referenced", b->base->ident->toChars()); | |
| 778 else | |
| 779 { | |
| 780 s = b->base->search(loc, ident, flags); | |
| 781 if (s == this) // happens if s is nested in this and derives from this | |
| 782 s = NULL; | |
| 783 else if (s) | |
| 784 break; | |
| 785 } | |
| 786 } | |
| 787 } | |
| 788 } | |
| 789 return s; | |
| 790 } | |
| 791 | |
|
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792 /********************************************************** |
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793 * fd is in the vtbl[] for this class. |
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794 * Return 1 if function is hidden (not findable through search). |
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795 */ |
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796 |
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797 #if V2 |
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798 int isf(void *param, FuncDeclaration *fd) |
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799 { |
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800 //printf("param = %p, fd = %p %s\n", param, fd, fd->toChars()); |
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801 return param == fd; |
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802 } |
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803 |
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804 int ClassDeclaration::isFuncHidden(FuncDeclaration *fd) |
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805 { |
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806 //printf("ClassDeclaration::isFuncHidden(%s)\n", fd->toChars()); |
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807 Dsymbol *s = search(0, fd->ident, 4|2); |
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808 if (!s) |
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809 { //printf("not found\n"); |
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810 /* Because, due to a hack, if there are multiple definitions |
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811 * of fd->ident, NULL is returned. |
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812 */ |
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813 return 0; |
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814 } |
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815 FuncDeclaration *fdstart = s->toAlias()->isFuncDeclaration(); |
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816 //printf("%s fdstart = %p\n", s->kind(), fdstart); |
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817 return !overloadApply(fdstart, &isf, fd); |
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818 } |
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819 #endif |
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820 |
| 1 | 821 /**************** |
| 822 * Find virtual function matching identifier and type. | |
| 823 * Used to build virtual function tables for interface implementations. | |
| 824 */ | |
| 825 | |
| 826 FuncDeclaration *ClassDeclaration::findFunc(Identifier *ident, TypeFunction *tf) | |
| 827 { | |
| 828 //printf("ClassDeclaration::findFunc(%s, %s) %s\n", ident->toChars(), tf->toChars(), toChars()); | |
| 829 | |
| 830 ClassDeclaration *cd = this; | |
| 831 Array *vtbl = &cd->vtbl; | |
| 832 while (1) | |
| 833 { | |
| 834 for (size_t i = 0; i < vtbl->dim; i++) | |
| 835 { | |
| 836 FuncDeclaration *fd = (FuncDeclaration *)vtbl->data[i]; | |
| 837 | |
| 838 //printf("\t[%d] = %s\n", i, fd->toChars()); | |
| 839 if (ident == fd->ident && | |
| 840 //tf->equals(fd->type) | |
| 841 fd->type->covariant(tf) == 1 | |
| 842 ) | |
| 843 { //printf("\t\tfound\n"); | |
| 844 return fd; | |
| 845 } | |
| 846 //else printf("\t\t%d\n", fd->type->covariant(tf)); | |
| 847 } | |
| 848 if (!cd) | |
| 849 break; | |
| 850 vtbl = &cd->vtblFinal; | |
| 851 cd = cd->baseClass; | |
| 852 } | |
| 853 | |
| 854 return NULL; | |
| 855 } | |
| 856 | |
| 857 void ClassDeclaration::interfaceSemantic(Scope *sc) | |
| 858 { int i; | |
| 859 | |
| 860 vtblInterfaces = new BaseClasses(); | |
| 861 vtblInterfaces->reserve(interfaces_dim); | |
| 862 | |
| 863 for (i = 0; i < interfaces_dim; i++) | |
| 864 { | |
| 865 BaseClass *b = interfaces[i]; | |
| 866 | |
| 867 // If this is an interface, and it derives from a COM interface, | |
| 868 // then this is a COM interface too. | |
|
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869 if (b->base->isCOMinterface()) |
| 1 | 870 com = 1; |
| 871 | |
| 872 vtblInterfaces->push(b); | |
| 873 b->copyBaseInterfaces(vtblInterfaces); | |
| 874 } | |
| 875 } | |
| 876 | |
| 877 /**************************************** | |
| 878 */ | |
| 879 | |
| 880 int ClassDeclaration::isCOMclass() | |
| 881 { | |
| 882 return com; | |
| 883 } | |
| 884 | |
|
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885 int ClassDeclaration::isCOMinterface() |
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886 { |
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887 return 0; |
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888 } |
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889 |
| 1 | 890 |
| 891 /**************************************** | |
| 892 */ | |
| 893 | |
| 894 int ClassDeclaration::isAbstract() | |
| 895 { | |
| 896 if (isabstract) | |
| 897 return TRUE; | |
| 898 for (int i = 1; i < vtbl.dim; i++) | |
| 899 { | |
| 900 FuncDeclaration *fd = ((Dsymbol *)vtbl.data[i])->isFuncDeclaration(); | |
| 901 | |
| 902 //printf("\tvtbl[%d] = %p\n", i, fd); | |
| 903 if (!fd || fd->isAbstract()) | |
| 904 { | |
| 905 isabstract |= 1; | |
| 906 return TRUE; | |
| 907 } | |
| 908 } | |
| 909 return FALSE; | |
| 910 } | |
| 911 | |
| 912 /**************************************** | |
| 913 * Returns !=0 if there's an extra member which is the 'this' | |
| 914 * pointer to the enclosing context (enclosing class or function) | |
| 915 */ | |
| 916 | |
| 917 int ClassDeclaration::isNested() | |
| 918 { | |
| 919 return isnested; | |
| 920 } | |
| 921 | |
| 922 /**************************************** | |
| 923 * Determine if slot 0 of the vtbl[] is reserved for something else. | |
| 924 * For class objects, yes, this is where the classinfo ptr goes. | |
| 925 * For COM interfaces, no. | |
| 926 * For non-COM interfaces, yes, this is where the Interface ptr goes. | |
| 927 */ | |
| 928 | |
| 929 int ClassDeclaration::vtblOffset() | |
| 930 { | |
| 931 return 1; | |
| 932 } | |
| 933 | |
| 934 /**************************************** | |
| 935 */ | |
| 936 | |
| 937 char *ClassDeclaration::kind() | |
| 938 { | |
| 939 return "class"; | |
| 940 } | |
| 941 | |
| 942 /**************************************** | |
| 943 */ | |
| 944 | |
| 945 void ClassDeclaration::addLocalClass(ClassDeclarations *aclasses) | |
| 946 { | |
| 947 aclasses->push(this); | |
| 948 } | |
| 949 | |
| 950 /********************************* InterfaceDeclaration ****************************/ | |
| 951 | |
| 952 InterfaceDeclaration::InterfaceDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses) | |
| 953 : ClassDeclaration(loc, id, baseclasses) | |
| 954 { | |
| 955 com = 0; | |
| 956 if (id == Id::IUnknown) // IUnknown is the root of all COM objects | |
| 957 com = 1; | |
| 958 } | |
| 959 | |
| 960 Dsymbol *InterfaceDeclaration::syntaxCopy(Dsymbol *s) | |
| 961 { | |
| 962 InterfaceDeclaration *id; | |
| 963 | |
| 964 if (s) | |
| 965 id = (InterfaceDeclaration *)s; | |
| 966 else | |
| 967 id = new InterfaceDeclaration(loc, ident, NULL); | |
| 968 | |
| 969 ClassDeclaration::syntaxCopy(id); | |
| 970 return id; | |
| 971 } | |
| 972 | |
| 973 void InterfaceDeclaration::semantic(Scope *sc) | |
| 974 { int i; | |
| 975 | |
| 976 //printf("InterfaceDeclaration::semantic(%s), type = %p\n", toChars(), type); | |
| 977 if (!scope) | |
| 978 { type = type->semantic(loc, sc); | |
| 979 handle = handle->semantic(loc, sc); | |
| 980 } | |
| 981 if (!members) // if forward reference | |
| 982 { //printf("\tinterface '%s' is forward referenced\n", toChars()); | |
| 983 return; | |
| 984 } | |
| 985 if (symtab) // if already done | |
| 986 { if (!scope) | |
| 987 return; | |
| 988 } | |
| 989 else | |
| 990 symtab = new DsymbolTable(); | |
| 991 | |
| 992 Scope *scx = NULL; | |
| 993 if (scope) | |
| 994 { sc = scope; | |
| 995 scx = scope; // save so we don't make redundant copies | |
| 996 scope = NULL; | |
| 997 } | |
| 998 | |
|
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999 if (sc->stc & STCdeprecated) |
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1000 { |
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1001 isdeprecated = 1; |
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1002 } |
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1003 |
| 1 | 1004 // Expand any tuples in baseclasses[] |
| 1005 for (i = 0; i < baseclasses.dim; ) | |
| 1006 { BaseClass *b = (BaseClass *)baseclasses.data[0]; | |
| 1007 b->type = b->type->semantic(loc, sc); | |
| 1008 Type *tb = b->type->toBasetype(); | |
| 1009 | |
| 1010 if (tb->ty == Ttuple) | |
| 1011 { TypeTuple *tup = (TypeTuple *)tb; | |
| 1012 enum PROT protection = b->protection; | |
| 1013 baseclasses.remove(i); | |
| 1014 size_t dim = Argument::dim(tup->arguments); | |
| 1015 for (size_t j = 0; j < dim; j++) | |
| 1016 { Argument *arg = Argument::getNth(tup->arguments, j); | |
| 1017 b = new BaseClass(arg->type, protection); | |
| 1018 baseclasses.insert(i + j, b); | |
| 1019 } | |
| 1020 } | |
| 1021 else | |
| 1022 i++; | |
| 1023 } | |
| 1024 | |
| 1025 // Check for errors, handle forward references | |
| 1026 for (i = 0; i < baseclasses.dim; ) | |
| 1027 { TypeClass *tc; | |
| 1028 BaseClass *b; | |
| 1029 Type *tb; | |
| 1030 | |
| 1031 b = (BaseClass *)baseclasses.data[i]; | |
| 1032 b->type = b->type->semantic(loc, sc); | |
| 1033 tb = b->type->toBasetype(); | |
| 1034 if (tb->ty == Tclass) | |
| 1035 tc = (TypeClass *)tb; | |
| 1036 else | |
| 1037 tc = NULL; | |
| 1038 if (!tc || !tc->sym->isInterfaceDeclaration()) | |
| 1039 { | |
| 1040 error("base type must be interface, not %s", b->type->toChars()); | |
| 1041 baseclasses.remove(i); | |
| 1042 continue; | |
| 1043 } | |
| 1044 else | |
| 1045 { | |
| 1046 // Check for duplicate interfaces | |
| 1047 for (size_t j = 0; j < i; j++) | |
| 1048 { | |
| 1049 BaseClass *b2 = (BaseClass *)baseclasses.data[j]; | |
| 1050 if (b2->base == tc->sym) | |
| 1051 error("inherits from duplicate interface %s", b2->base->toChars()); | |
| 1052 } | |
| 1053 | |
| 1054 b->base = tc->sym; | |
| 1055 if (b->base == this || isBaseOf2(b->base)) | |
| 1056 { | |
| 1057 error("circular inheritance of interface"); | |
| 1058 baseclasses.remove(i); | |
| 1059 continue; | |
| 1060 } | |
| 1061 if (!b->base->symtab || b->base->scope) | |
| 1062 { | |
| 1063 //error("forward reference of base class %s", baseClass->toChars()); | |
| 1064 // Forward reference of base, try again later | |
| 1065 //printf("\ttry later, forward reference of base %s\n", b->base->toChars()); | |
| 1066 scope = scx ? scx : new Scope(*sc); | |
| 1067 scope->setNoFree(); | |
| 1068 scope->module->addDeferredSemantic(this); | |
| 1069 return; | |
| 1070 } | |
| 1071 } | |
| 1072 i++; | |
| 1073 } | |
| 1074 | |
| 1075 interfaces_dim = baseclasses.dim; | |
| 1076 interfaces = (BaseClass **)baseclasses.data; | |
| 1077 | |
| 1078 interfaceSemantic(sc); | |
| 1079 | |
| 1080 if (vtblOffset()) | |
| 1081 vtbl.push(this); // leave room at vtbl[0] for classinfo | |
| 1082 | |
| 1083 // Cat together the vtbl[]'s from base interfaces | |
| 1084 for (i = 0; i < interfaces_dim; i++) | |
| 1085 { BaseClass *b = interfaces[i]; | |
| 1086 | |
| 1087 // Skip if b has already appeared | |
| 1088 for (int k = 0; k < i; k++) | |
| 1089 { | |
| 1090 if (b == interfaces[i]) | |
| 1091 goto Lcontinue; | |
| 1092 } | |
| 1093 | |
| 1094 // Copy vtbl[] from base class | |
| 1095 if (b->base->vtblOffset()) | |
| 1096 { int d = b->base->vtbl.dim; | |
| 1097 if (d > 1) | |
| 1098 { | |
| 1099 vtbl.reserve(d - 1); | |
| 1100 for (int j = 1; j < d; j++) | |
| 1101 vtbl.push(b->base->vtbl.data[j]); | |
| 1102 } | |
| 1103 } | |
| 1104 else | |
| 1105 { | |
| 1106 vtbl.append(&b->base->vtbl); | |
| 1107 } | |
| 1108 | |
| 1109 Lcontinue: | |
| 1110 ; | |
| 1111 } | |
| 1112 | |
| 1113 for (i = 0; i < members->dim; i++) | |
| 1114 { | |
| 1115 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 1116 s->addMember(sc, this, 1); | |
| 1117 } | |
| 1118 | |
| 1119 sc = sc->push(this); | |
| 1120 sc->parent = this; | |
|
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1121 if (isCOMinterface()) |
| 1 | 1122 sc->linkage = LINKwindows; |
| 1123 sc->structalign = 8; | |
| 1124 structalign = sc->structalign; | |
| 1125 sc->offset = 8; | |
| 1126 for (i = 0; i < members->dim; i++) | |
| 1127 { | |
| 1128 Dsymbol *s = (Dsymbol *)members->data[i]; | |
| 1129 s->semantic(sc); | |
| 1130 } | |
| 1131 //members->print(); | |
| 1132 sc->pop(); | |
| 1133 //printf("-InterfaceDeclaration::semantic(%s), type = %p\n", toChars(), type); | |
| 1134 } | |
| 1135 | |
| 1136 | |
| 1137 /******************************************* | |
| 1138 * Determine if 'this' is a base class of cd. | |
| 1139 * (Actually, if it is an interface supported by cd) | |
| 1140 * Output: | |
| 1141 * *poffset offset to start of class | |
| 1142 * OFFSET_RUNTIME must determine offset at runtime | |
| 1143 * Returns: | |
| 1144 * 0 not a base | |
| 1145 * 1 is a base | |
| 1146 */ | |
| 1147 | |
| 1148 int InterfaceDeclaration::isBaseOf(ClassDeclaration *cd, int *poffset) | |
| 1149 { | |
| 1150 unsigned j; | |
| 1151 | |
| 1152 //printf("%s.InterfaceDeclaration::isBaseOf(cd = '%s')\n", toChars(), cd->toChars()); | |
| 1153 assert(!baseClass); | |
| 1154 for (j = 0; j < cd->interfaces_dim; j++) | |
| 1155 { | |
| 1156 BaseClass *b = cd->interfaces[j]; | |
| 1157 | |
| 1158 //printf("\tbase %s\n", b->base->toChars()); | |
| 1159 if (this == b->base) | |
| 1160 { | |
| 1161 //printf("\tfound at offset %d\n", b->offset); | |
| 1162 if (poffset) | |
| 1163 { *poffset = b->offset; | |
| 1164 if (j && cd->isInterfaceDeclaration()) | |
| 1165 *poffset = OFFSET_RUNTIME; | |
| 1166 } | |
| 1167 return 1; | |
| 1168 } | |
| 1169 if (isBaseOf(b, poffset)) | |
| 1170 { if (j && poffset && cd->isInterfaceDeclaration()) | |
| 1171 *poffset = OFFSET_RUNTIME; | |
| 1172 return 1; | |
| 1173 } | |
| 1174 } | |
| 1175 | |
| 1176 if (cd->baseClass && isBaseOf(cd->baseClass, poffset)) | |
| 1177 return 1; | |
| 1178 | |
| 1179 if (poffset) | |
| 1180 *poffset = 0; | |
| 1181 return 0; | |
| 1182 } | |
| 1183 | |
| 1184 | |
| 1185 int InterfaceDeclaration::isBaseOf(BaseClass *bc, int *poffset) | |
| 1186 { | |
| 1187 //printf("%s.InterfaceDeclaration::isBaseOf(bc = '%s')\n", toChars(), bc->base->toChars()); | |
| 1188 for (unsigned j = 0; j < bc->baseInterfaces_dim; j++) | |
| 1189 { | |
| 1190 BaseClass *b = &bc->baseInterfaces[j]; | |
| 1191 | |
| 1192 if (this == b->base) | |
| 1193 { | |
| 1194 if (poffset) | |
| 1195 { *poffset = b->offset; | |
| 1196 } | |
| 1197 return 1; | |
| 1198 } | |
| 1199 if (isBaseOf(b, poffset)) | |
| 1200 { | |
| 1201 return 1; | |
| 1202 } | |
| 1203 } | |
| 1204 if (poffset) | |
| 1205 *poffset = 0; | |
| 1206 return 0; | |
| 1207 } | |
| 1208 | |
| 1209 /**************************************** | |
| 1210 * Determine if slot 0 of the vtbl[] is reserved for something else. | |
|
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1211 * For class objects, yes, this is where the ClassInfo ptr goes. |
| 1 | 1212 * For COM interfaces, no. |
| 1213 * For non-COM interfaces, yes, this is where the Interface ptr goes. | |
| 1214 */ | |
| 1215 | |
| 1216 int InterfaceDeclaration::vtblOffset() | |
| 1217 { | |
|
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1218 if (isCOMinterface()) |
| 1 | 1219 return 0; |
| 1220 return 1; | |
| 1221 } | |
| 1222 | |
|
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1223 int InterfaceDeclaration::isCOMinterface() |
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1224 { |
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1225 return com; |
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1226 } |
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1227 |
| 1 | 1228 /******************************************* |
| 1229 */ | |
| 1230 | |
| 1231 char *InterfaceDeclaration::kind() | |
| 1232 { | |
| 1233 return "interface"; | |
| 1234 } | |
| 1235 | |
| 1236 | |
| 1237 /******************************** BaseClass *****************************/ | |
| 1238 | |
| 1239 BaseClass::BaseClass() | |
| 1240 { | |
| 1241 memset(this, 0, sizeof(BaseClass)); | |
| 1242 } | |
| 1243 | |
| 1244 BaseClass::BaseClass(Type *type, enum PROT protection) | |
| 1245 { | |
| 1246 //printf("BaseClass(this = %p, '%s')\n", this, type->toChars()); | |
| 1247 this->type = type; | |
| 1248 this->protection = protection; | |
| 1249 base = NULL; | |
| 1250 offset = 0; | |
| 1251 | |
| 1252 baseInterfaces_dim = 0; | |
| 1253 baseInterfaces = NULL; | |
| 1254 } | |
| 1255 | |
| 1256 /**************************************** | |
| 1257 * Fill in vtbl[] for base class based on member functions of class cd. | |
| 1258 * Input: | |
| 1259 * vtbl if !=NULL, fill it in | |
| 1260 * newinstance !=0 means all entries must be filled in by members | |
| 1261 * of cd, not members of any base classes of cd. | |
| 1262 * Returns: | |
| 1263 * !=0 if any entries were filled in by members of cd (not exclusively | |
| 1264 * by base classes) | |
| 1265 */ | |
| 1266 | |
| 1267 int BaseClass::fillVtbl(ClassDeclaration *cd, Array *vtbl, int newinstance) | |
| 1268 { | |
| 1269 ClassDeclaration *id = base; | |
| 1270 int j; | |
| 1271 int result = 0; | |
| 1272 | |
| 1273 //printf("BaseClass::fillVtbl(this='%s', cd='%s')\n", base->toChars(), cd->toChars()); | |
| 1274 if (vtbl) | |
| 1275 vtbl->setDim(base->vtbl.dim); | |
| 1276 | |
| 1277 // first entry is ClassInfo reference | |
| 1278 for (j = base->vtblOffset(); j < base->vtbl.dim; j++) | |
| 1279 { | |
| 1280 FuncDeclaration *ifd = ((Dsymbol *)base->vtbl.data[j])->isFuncDeclaration(); | |
| 1281 FuncDeclaration *fd; | |
| 1282 TypeFunction *tf; | |
| 1283 | |
| 1284 //printf(" vtbl[%d] is '%s'\n", j, ifd ? ifd->toChars() : "null"); | |
| 1285 | |
| 1286 assert(ifd); | |
| 1287 // Find corresponding function in this class | |
| 1288 tf = (ifd->type->ty == Tfunction) ? (TypeFunction *)(ifd->type) : NULL; | |
| 1289 fd = cd->findFunc(ifd->ident, tf); | |
| 1290 if (fd && !fd->isAbstract()) | |
| 1291 { | |
| 1292 //printf(" found\n"); | |
| 1293 // Check that calling conventions match | |
| 1294 if (fd->linkage != ifd->linkage) | |
| 1295 fd->error("linkage doesn't match interface function"); | |
| 1296 | |
| 1297 // Check that it is current | |
| 1298 if (newinstance && | |
| 1299 fd->toParent() != cd && | |
| 1300 ifd->toParent() == base) | |
| 1301 cd->error("interface function %s.%s is not implemented", | |
| 1302 id->toChars(), ifd->ident->toChars()); | |
| 1303 | |
| 1304 if (fd->toParent() == cd) | |
| 1305 result = 1; | |
| 1306 } | |
| 1307 else | |
| 1308 { | |
| 1309 //printf(" not found\n"); | |
| 1310 // BUG: should mark this class as abstract? | |
| 1311 if (!cd->isAbstract()) | |
| 1312 cd->error("interface function %s.%s isn't implemented", | |
| 1313 id->toChars(), ifd->ident->toChars()); | |
| 1314 fd = NULL; | |
| 1315 } | |
| 1316 if (vtbl) | |
| 1317 vtbl->data[j] = fd; | |
| 1318 } | |
| 1319 | |
| 1320 return result; | |
| 1321 } | |
| 1322 | |
| 1323 void BaseClass::copyBaseInterfaces(BaseClasses *vtblInterfaces) | |
| 1324 { | |
| 1325 //printf("+copyBaseInterfaces(), %s\n", base->toChars()); | |
| 1326 // if (baseInterfaces_dim) | |
| 1327 // return; | |
| 1328 | |
| 1329 baseInterfaces_dim = base->interfaces_dim; | |
| 1330 baseInterfaces = (BaseClass *)mem.calloc(baseInterfaces_dim, sizeof(BaseClass)); | |
| 1331 | |
| 1332 //printf("%s.copyBaseInterfaces()\n", base->toChars()); | |
| 1333 for (int i = 0; i < baseInterfaces_dim; i++) | |
| 1334 { | |
| 1335 BaseClass *b = &baseInterfaces[i]; | |
| 1336 BaseClass *b2 = base->interfaces[i]; | |
| 1337 | |
| 1338 assert(b2->vtbl.dim == 0); // should not be filled yet | |
| 1339 memcpy(b, b2, sizeof(BaseClass)); | |
| 1340 | |
| 1341 if (i) // single inheritance is i==0 | |
| 1342 vtblInterfaces->push(b); // only need for M.I. | |
| 1343 b->copyBaseInterfaces(vtblInterfaces); | |
| 1344 } | |
| 1345 //printf("-copyBaseInterfaces\n"); | |
| 1346 } |