Mercurial > projects > ddmd
annotate dmd/InterfaceDeclaration.d @ 130:60bb0fe4563e
dmdfe 2.037 first main iteration
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Thu, 09 Sep 2010 22:51:44 +0100 |
| parents | 767a01c2a272 |
| children | d8565fbd755c |
| rev | line source |
|---|---|
| 0 | 1 module dmd.InterfaceDeclaration; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.ClassDeclaration; |
| 5 import dmd.Loc; | |
| 6 import dmd.DsymbolTable; | |
| 7 import dmd.STC; | |
| 8 import dmd.Type; | |
| 9 import dmd.TY; | |
| 10 import dmd.LINK; | |
|
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11 import dmd.Parameter; |
| 0 | 12 import dmd.Util; |
| 13 import dmd.TypeTuple; | |
| 14 import dmd.PROT; | |
| 15 import dmd.TypeClass; | |
| 16 import dmd.Identifier; | |
| 17 import dmd.ArrayTypes; | |
| 18 import dmd.Dsymbol; | |
| 19 import dmd.Scope; | |
| 20 import dmd.Global; | |
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21 import dmd.Module; |
| 0 | 22 import dmd.BaseClass; |
| 23 import dmd.Id; | |
| 24 | |
| 25 import dmd.backend.Symbol; | |
| 26 import dmd.backend.TYM; | |
| 27 import dmd.backend.dt_t; | |
| 28 import dmd.backend.Util; | |
| 29 import dmd.codegen.Util; | |
| 30 import dmd.backend.SC; | |
| 31 import dmd.backend.FL; | |
| 32 import dmd.backend.LIST; | |
| 33 import dmd.backend.SFL; | |
| 34 | |
| 35 class InterfaceDeclaration : ClassDeclaration | |
| 36 { | |
| 37 version (DMDV2) { | |
| 38 bool cpp; // true if this is a C++ interface | |
| 39 } | |
| 40 this(Loc loc, Identifier id, BaseClasses baseclasses) | |
| 41 { | |
| 42 super(loc, id, baseclasses); | |
| 43 | |
| 44 if (id is Id.IUnknown) // IUnknown is the root of all COM interfaces | |
| 45 { | |
| 46 com = true; | |
| 47 cpp = true; // IUnknown is also a C++ interface | |
| 48 } | |
| 49 } | |
| 50 | |
| 72 | 51 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 52 { |
| 123 | 53 InterfaceDeclaration id; |
| 54 | |
| 55 if (s) | |
| 56 id = cast(InterfaceDeclaration)s; | |
| 57 else | |
| 58 id = new InterfaceDeclaration(loc, ident, null); | |
| 59 | |
| 60 ClassDeclaration.syntaxCopy(id); | |
| 61 return id; | |
| 0 | 62 } |
| 63 | |
| 72 | 64 override void semantic(Scope sc) |
| 0 | 65 { |
| 66 //printf("InterfaceDeclaration.semantic(%s), type = %p\n", toChars(), type); | |
| 67 if (inuse) | |
| 68 return; | |
| 69 | |
| 70 if (!sc) | |
| 71 sc = scope_; | |
| 72 if (!parent && sc.parent && !sc.parent.isModule()) | |
| 73 parent = sc.parent; | |
| 74 | |
| 75 type = type.semantic(loc, sc); | |
| 76 handle = type; | |
| 77 | |
| 78 if (!members) // if forward reference | |
| 79 { | |
| 80 //printf("\tinterface '%s' is forward referenced\n", toChars()); | |
| 81 return; | |
| 82 } | |
| 83 if (symtab) // if already done | |
| 84 { | |
| 85 if (!scope_) | |
| 86 return; | |
| 87 } | |
| 88 else | |
| 89 symtab = new DsymbolTable(); | |
| 90 | |
| 91 Scope scx = null; | |
| 92 if (scope_) | |
| 93 { | |
| 94 sc = scope_; | |
| 95 scx = scope_; // save so we don't make redundant copies | |
| 96 scope_ = null; | |
| 97 } | |
| 98 | |
| 99 if (sc.stc & STC.STCdeprecated) | |
| 100 { | |
| 101 isdeprecated = true; | |
| 102 } | |
| 103 | |
| 104 // Expand any tuples in baseclasses[] | |
| 89 | 105 for (size_t i = 0; i < baseclasses.dim; ) |
| 0 | 106 { |
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107 auto b = baseclasses[0]; |
| 0 | 108 b.type = b.type.semantic(loc, sc); |
| 109 Type tb = b.type.toBasetype(); | |
| 110 | |
| 111 if (tb.ty == TY.Ttuple) | |
| 112 { TypeTuple tup = cast(TypeTuple)tb; | |
| 113 PROT protection = b.protection; | |
| 114 baseclasses.remove(i); | |
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115 size_t dim = Parameter.dim(tup.arguments); |
| 0 | 116 for (size_t j = 0; j < dim; j++) |
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117 { auto arg = Parameter.getNth(tup.arguments, j); |
| 0 | 118 b = new BaseClass(arg.type, protection); |
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119 baseclasses.insert(i + j, b); |
| 0 | 120 } |
| 121 } | |
| 122 else | |
| 123 i++; | |
| 124 } | |
| 125 | |
| 126 if (!baseclasses.dim && sc.linkage == LINK.LINKcpp) | |
| 127 cpp = 1; | |
| 128 | |
| 129 // Check for errors, handle forward references | |
| 89 | 130 for (size_t i = 0; i < baseclasses.dim; ) |
| 0 | 131 { |
| 132 TypeClass tc; | |
| 133 BaseClass b; | |
| 134 Type tb; | |
| 135 | |
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136 b = baseclasses[i]; |
| 0 | 137 b.type = b.type.semantic(loc, sc); |
| 138 tb = b.type.toBasetype(); | |
| 139 if (tb.ty == TY.Tclass) | |
| 140 tc = cast(TypeClass)tb; | |
| 141 else | |
| 142 tc = null; | |
| 143 if (!tc || !tc.sym.isInterfaceDeclaration()) | |
| 144 { | |
| 145 error("base type must be interface, not %s", b.type.toChars()); | |
| 146 baseclasses.remove(i); | |
| 147 continue; | |
| 148 } | |
| 149 else | |
| 150 { | |
| 151 // Check for duplicate interfaces | |
| 152 for (size_t j = 0; j < i; j++) | |
| 153 { | |
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154 auto b2 = baseclasses[j]; |
| 0 | 155 if (b2.base is tc.sym) |
| 156 error("inherits from duplicate interface %s", b2.base.toChars()); | |
| 157 } | |
| 158 | |
| 159 b.base = tc.sym; | |
| 160 if (b.base == this || isBaseOf2(b.base)) | |
| 161 { | |
| 162 error("circular inheritance of interface"); | |
| 163 baseclasses.remove(i); | |
| 164 continue; | |
| 165 } | |
| 166 if (!b.base.symtab) | |
| 167 { | |
| 168 // Try to resolve forward reference | |
| 169 if (sc.mustsemantic && b.base.scope_) | |
| 170 b.base.semantic(null); | |
| 171 } | |
| 172 if (!b.base.symtab || b.base.scope_ || b.base.inuse) | |
| 173 { | |
| 174 //error("forward reference of base class %s", baseClass.toChars()); | |
| 175 // Forward reference of base, try again later | |
| 176 //printf("\ttry later, forward reference of base %s\n", b.base.toChars()); | |
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177 scope_ = scx ? scx : sc.clone(); |
| 0 | 178 scope_.setNoFree(); |
| 179 scope_.module_.addDeferredSemantic(this); | |
| 180 return; | |
| 181 } | |
| 182 } | |
| 183 static if (false) { | |
| 184 // Inherit const/invariant from base class | |
| 185 storage_class |= b.base.storage_class & STC.STC_TYPECTOR; | |
| 186 } | |
| 187 i++; | |
| 188 } | |
| 189 | |
| 190 interfaces_dim = baseclasses.dim; | |
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191 interfaces = baseclasses.ptr; |
| 0 | 192 |
| 193 interfaceSemantic(sc); | |
| 194 | |
| 195 if (vtblOffset()) | |
| 196 vtbl.push(cast(void*)this); // leave room at vtbl[0] for classinfo | |
| 197 | |
| 198 // Cat together the vtbl[]'s from base interfaces | |
| 89 | 199 for (size_t i = 0; i < interfaces_dim; i++) |
| 0 | 200 { |
| 201 BaseClass b = interfaces[i]; | |
| 202 | |
| 203 // Skip if b has already appeared | |
| 204 for (int k = 0; k < i; k++) | |
| 205 { | |
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206 if (b == interfaces[k]) |
| 0 | 207 goto Lcontinue; |
| 208 } | |
| 209 | |
| 210 // Copy vtbl[] from base class | |
| 211 if (b.base.vtblOffset()) | |
| 212 { int d = b.base.vtbl.dim; | |
| 213 if (d > 1) | |
| 214 { | |
| 215 vtbl.reserve(d - 1); | |
| 216 for (int j = 1; j < d; j++) | |
| 217 vtbl.push(b.base.vtbl.data[j]); | |
| 218 } | |
| 219 } | |
| 220 else | |
| 221 { | |
| 222 vtbl.append(b.base.vtbl); | |
| 223 } | |
| 224 | |
| 225 Lcontinue: | |
| 226 ; | |
| 227 } | |
| 228 | |
| 229 protection = sc.protection; | |
| 230 storage_class |= sc.stc & STC.STC_TYPECTOR; | |
| 231 | |
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232 foreach(Dsymbol s; members) |
| 13 | 233 s.addMember(sc, this, true); |
| 0 | 234 |
| 235 sc = sc.push(this); | |
| 236 sc.stc &= ~(STC.STCfinal | STC.STCauto | STC.STCscope | STC.STCstatic | | |
| 237 STC.STCabstract | STC.STCdeprecated | STC.STC_TYPECTOR | STC.STCtls | STC.STCgshared); | |
| 238 sc.stc |= storage_class & STC.STC_TYPECTOR; | |
| 239 sc.parent = this; | |
| 240 if (isCOMinterface()) | |
| 241 sc.linkage = LINK.LINKwindows; | |
| 242 else if (isCPPinterface()) | |
| 243 sc.linkage = LINK.LINKcpp; | |
| 244 sc.structalign = 8; | |
| 245 structalign = sc.structalign; | |
| 246 sc.offset = PTRSIZE * 2; | |
| 247 inuse++; | |
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248 foreach(Dsymbol s; members) |
| 0 | 249 s.semantic(sc); |
| 250 inuse--; | |
| 251 //members.print(); | |
| 252 sc.pop(); | |
| 253 //printf("-InterfaceDeclaration.semantic(%s), type = %p\n", toChars(), type); | |
| 254 } | |
| 255 | |
| 72 | 256 override bool isBaseOf(ClassDeclaration cd, int* poffset) |
| 0 | 257 { |
| 258 uint j; | |
| 259 | |
| 260 //printf("%s.InterfaceDeclaration.isBaseOf(cd = '%s')\n", toChars(), cd.toChars()); | |
| 261 assert(!baseClass); | |
| 262 for (j = 0; j < cd.interfaces_dim; j++) | |
| 263 { | |
| 264 BaseClass b = cd.interfaces[j]; | |
| 265 | |
| 266 //printf("\tbase %s\n", b.base.toChars()); | |
| 267 if (this == b.base) | |
| 268 { | |
| 269 //printf("\tfound at offset %d\n", b.offset); | |
| 270 if (poffset) | |
| 271 { | |
| 272 *poffset = b.offset; | |
| 273 if (j && cd.isInterfaceDeclaration()) | |
| 274 *poffset = OFFSET_RUNTIME; | |
| 275 } | |
| 276 return true; | |
| 277 } | |
| 278 if (isBaseOf(b, poffset)) | |
| 279 { | |
| 280 if (j && poffset && cd.isInterfaceDeclaration()) | |
| 281 *poffset = OFFSET_RUNTIME; | |
| 282 return true; | |
| 283 } | |
| 284 } | |
| 285 | |
| 286 if (cd.baseClass && isBaseOf(cd.baseClass, poffset)) | |
| 287 return true; | |
| 288 | |
| 289 if (poffset) | |
| 290 *poffset = 0; | |
| 291 return false; | |
| 292 } | |
| 293 | |
| 294 bool isBaseOf(BaseClass bc, int* poffset) | |
| 295 { | |
| 64 | 296 //printf("%s.InterfaceDeclaration.isBaseOf(bc = '%s')\n", toChars(), bc.base.toChars()); |
| 297 for (uint j = 0; j < bc.baseInterfaces.length; j++) | |
| 298 { | |
| 299 BaseClass b = bc.baseInterfaces[j]; | |
| 300 | |
| 301 if (this == b.base) | |
| 302 { | |
| 303 if (poffset) | |
| 304 { | |
| 305 *poffset = b.offset; | |
| 306 if (j && bc.base.isInterfaceDeclaration()) | |
| 307 *poffset = OFFSET_RUNTIME; | |
| 308 } | |
| 309 return 1; | |
| 310 } | |
| 311 if (isBaseOf(b, poffset)) | |
| 312 { | |
| 313 if (j && poffset && bc.base.isInterfaceDeclaration()) | |
| 314 *poffset = OFFSET_RUNTIME; | |
| 315 return 1; | |
| 316 } | |
| 317 } | |
| 318 if (poffset) | |
| 319 *poffset = 0; | |
| 320 return 0; | |
| 0 | 321 } |
| 322 | |
| 72 | 323 override string kind() |
| 0 | 324 { |
| 325 assert(false); | |
| 326 } | |
| 327 | |
| 328 /**************************************** | |
| 329 * Determine if slot 0 of the vtbl[] is reserved for something else. | |
| 330 * For class objects, yes, this is where the ClassInfo ptr goes. | |
| 331 * For COM interfaces, no. | |
| 332 * For non-COM interfaces, yes, this is where the Interface ptr goes. | |
| 333 */ | |
| 72 | 334 override int vtblOffset() |
| 0 | 335 { |
| 336 if (isCOMinterface() || isCPPinterface()) | |
| 337 return 0; | |
| 338 return 1; | |
| 339 } | |
| 340 | |
| 341 version (DMDV2) { | |
| 72 | 342 override bool isCPPinterface() |
| 0 | 343 { |
| 344 return cpp; | |
| 345 } | |
| 346 } | |
| 72 | 347 override bool isCOMinterface() |
| 0 | 348 { |
| 349 return com; | |
| 350 } | |
| 351 | |
| 72 | 352 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 353 { |
| 354 uint offset; | |
| 355 Symbol* sinit; | |
| 356 SC scclass; | |
| 357 | |
| 358 //printf("InterfaceDeclaration.toObjFile('%s')\n", toChars()); | |
| 359 | |
| 360 if (!members) | |
| 361 return; | |
| 362 | |
| 363 if (global.params.symdebug) | |
| 364 toDebug(); | |
| 365 | |
| 366 scclass = SCglobal; | |
| 367 if (inTemplateInstance()) | |
| 368 scclass = SCcomdat; | |
| 369 | |
| 370 // Put out the members | |
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371 foreach(Dsymbol member; members) |
| 0 | 372 { |
| 373 if (!member.isFuncDeclaration()) | |
| 374 member.toObjFile(0); | |
| 375 } | |
| 376 | |
| 377 // Generate C symbols | |
| 378 toSymbol(); | |
| 379 | |
| 380 ////////////////////////////////////////////// | |
| 381 | |
| 382 // Put out the TypeInfo | |
| 383 type.getTypeInfo(null); | |
| 384 type.vtinfo.toObjFile(multiobj); | |
| 385 | |
| 386 ////////////////////////////////////////////// | |
| 387 | |
| 388 // Put out the ClassInfo | |
| 389 csym.Sclass = scclass; | |
| 390 csym.Sfl = FLdata; | |
| 391 | |
| 392 /* The layout is: | |
| 393 { | |
| 394 void **vptr; | |
| 395 monitor_t monitor; | |
| 396 byte[] initializer; // static initialization data | |
| 397 char[] name; // class name | |
| 398 void *[] vtbl; | |
| 399 Interface[] interfaces; | |
| 400 Object *base; // base class | |
| 401 void *destructor; | |
| 402 void *invariant; // class invariant | |
| 403 uint flags; | |
| 404 void *deallocator; | |
| 405 OffsetTypeInfo[] offTi; | |
| 406 void *defaultConstructor; | |
| 407 #if DMDV2 | |
| 408 const(MemberInfo[]) function(string) xgetMembers; // module getMembers() function | |
| 409 #endif | |
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410 //TypeInfo typeinfo; |
| 0 | 411 } |
| 412 */ | |
| 413 dt_t *dt = null; | |
| 414 | |
| 415 if (classinfo) | |
| 416 dtxoff(&dt, classinfo.toVtblSymbol(), 0, TYnptr); // vtbl for ClassInfo | |
| 417 else | |
| 418 dtdword(&dt, 0); // BUG: should be an assert() | |
| 419 dtdword(&dt, 0); // monitor | |
| 420 | |
| 421 // initializer[] | |
| 422 dtdword(&dt, 0); // size | |
| 423 dtdword(&dt, 0); // initializer | |
| 424 | |
| 425 // name[] | |
| 426 string name = toPrettyChars(); | |
| 427 size_t namelen = name.length; | |
| 428 dtdword(&dt, namelen); | |
| 429 dtabytes(&dt, TYnptr, 0, namelen + 1, toStringz(name)); | |
| 430 | |
| 431 // vtbl[] | |
| 432 dtdword(&dt, 0); | |
| 433 dtdword(&dt, 0); | |
| 434 | |
| 435 // vtblInterfaces.data[] | |
| 436 dtdword(&dt, vtblInterfaces.dim); | |
| 437 if (vtblInterfaces.dim) | |
| 438 { | |
| 439 if (classinfo) | |
| 440 assert(classinfo.structsize == CLASSINFO_SIZE); | |
| 441 offset = CLASSINFO_SIZE; | |
| 442 dtxoff(&dt, csym, offset, TYnptr); // (*) | |
| 443 } | |
| 444 else | |
| 445 dtdword(&dt, 0); | |
| 446 | |
| 447 // base | |
| 448 assert(!baseClass); | |
| 449 dtdword(&dt, 0); | |
| 450 | |
| 451 // dtor | |
| 452 dtdword(&dt, 0); | |
| 453 | |
| 454 // invariant | |
| 455 dtdword(&dt, 0); | |
| 456 | |
| 457 // flags | |
| 458 dtdword(&dt, 4 | isCOMinterface() | 32); | |
| 459 | |
| 460 // deallocator | |
| 461 dtdword(&dt, 0); | |
| 462 | |
| 463 // offTi[] | |
| 464 dtdword(&dt, 0); | |
| 465 dtdword(&dt, 0); // null for now, fix later | |
| 466 | |
| 467 // defaultConstructor | |
| 468 dtdword(&dt, 0); | |
| 469 | |
| 470 version (DMDV2) { | |
| 471 // xgetMembers | |
| 472 dtdword(&dt, 0); | |
| 473 } | |
| 474 | |
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475 //dtxoff(&dt, type.vtinfo.toSymbol(), 0, TYnptr); // typeinfo |
| 0 | 476 |
| 477 ////////////////////////////////////////////// | |
| 478 | |
| 479 // Put out vtblInterfaces.data[]. Must immediately follow csym, because | |
| 480 // of the fixup (*) | |
| 481 | |
| 482 offset += vtblInterfaces.dim * (4 * PTRSIZE); | |
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483 foreach (b; vtblInterfaces) |
| 0 | 484 { |
| 485 ClassDeclaration id = b.base; | |
| 486 | |
| 487 // ClassInfo | |
| 488 dtxoff(&dt, id.toSymbol(), 0, TYnptr); | |
| 489 | |
| 490 // vtbl[] | |
| 491 dtdword(&dt, 0); | |
| 492 dtdword(&dt, 0); | |
| 493 | |
| 494 // this offset | |
| 495 dtdword(&dt, b.offset); | |
| 496 } | |
| 497 | |
| 498 csym.Sdt = dt; | |
| 499 version (ELFOBJ) { | |
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500 csym.Sseg = Segment.CDATA; |
| 0 | 501 } |
| 502 version (MACHOBJ) { | |
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503 csym.Sseg = Segment.DATA; |
| 0 | 504 } |
| 505 outdata(csym); | |
| 506 if (isExport()) | |
| 507 obj_export(csym,0); | |
| 508 } | |
| 509 | |
| 510 /************************************* | |
| 511 * Create the "InterfaceInfo" symbol | |
| 512 */ | |
| 72 | 513 override Symbol* toSymbol() |
| 0 | 514 { |
| 515 if (!csym) | |
| 516 { | |
| 517 Symbol *s; | |
| 518 | |
| 519 if (!scc) | |
| 520 scc = fake_classsym(Id.ClassInfo); | |
| 521 | |
| 522 s = toSymbolX("__Interface", SCextern, scc.Stype, "Z"); | |
| 523 s.Sfl = FLextern; | |
| 524 s.Sflags |= SFLnodebug; | |
| 525 csym = s; | |
| 526 slist_add(s); | |
| 527 } | |
| 528 return csym; | |
| 529 } | |
| 530 | |
| 72 | 531 override InterfaceDeclaration isInterfaceDeclaration() { return this; } |
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532 } |