Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 77:ad4792a1cfd6
more D-ification container accessing
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Sun, 29 Aug 2010 14:36:55 +0100 |
| parents | 7e0d548de9e6 |
| children | 43073c7c7769 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.StructDeclaration; |
| 2 | |
| 3 import dmd.AggregateDeclaration; | |
| 4 import dmd.FuncDeclaration; | |
| 5 import dmd.DeclarationExp; | |
| 6 import dmd.VoidInitializer; | |
| 7 import dmd.Initializer; | |
| 8 import dmd.ExpInitializer; | |
| 9 import dmd.TOK; | |
| 10 import dmd.Statement; | |
| 11 import dmd.VarExp; | |
| 12 import dmd.CompoundStatement; | |
| 13 import dmd.AssignExp; | |
| 14 import dmd.DotVarExp; | |
| 15 import dmd.AddrExp; | |
| 16 import dmd.CastExp; | |
| 17 import dmd.PostBlitDeclaration; | |
| 18 import dmd.Lexer; | |
| 19 import dmd.ExpStatement; | |
| 20 import dmd.DotIdExp; | |
| 21 import dmd.TypeSArray; | |
| 22 import dmd.ThisExp; | |
| 23 import dmd.ThisDeclaration; | |
| 24 import dmd.TypeFunction; | |
| 25 import dmd.Argument; | |
| 26 import dmd.Id; | |
| 27 import dmd.TY; | |
| 28 import dmd.LINK; | |
| 29 import dmd.Type; | |
| 30 import dmd.DsymbolTable; | |
| 31 import dmd.ArrayTypes; | |
| 32 import dmd.Loc; | |
| 33 import dmd.STC; | |
| 34 import dmd.Identifier; | |
| 35 import dmd.TemplateInstance; | |
| 36 import dmd.Dsymbol; | |
| 37 import dmd.Scope; | |
| 38 import dmd.OutBuffer; | |
| 39 import dmd.HdrGenState; | |
| 40 import dmd.PROT; | |
| 41 import dmd.TypeStruct; | |
| 42 import dmd.expression.Util; | |
| 43 import dmd.Expression; | |
| 44 import dmd.IdentifierExp; | |
| 45 import dmd.PtrExp; | |
| 46 import dmd.CallExp; | |
| 47 import dmd.ReturnStatement; | |
| 48 import dmd.ScopeDsymbol; | |
| 49 import dmd.Module; | |
| 50 import dmd.VarDeclaration; | |
| 51 import dmd.InvariantDeclaration; | |
| 52 import dmd.NewDeclaration; | |
| 53 import dmd.DeleteDeclaration; | |
| 54 import dmd.Global; | |
| 55 | |
| 56 import dmd.backend.dt_t; | |
| 57 import dmd.backend.Util; | |
| 58 import dmd.backend.SC; | |
| 59 import dmd.backend.DT; | |
| 60 import dmd.backend.FL; | |
| 61 import dmd.backend.glue; | |
| 62 | |
| 63 class StructDeclaration : AggregateDeclaration | |
| 64 { | |
| 65 bool zeroInit; // true if initialize with 0 fill | |
| 66 | |
| 67 version (DMDV2) { | |
| 68 int hasIdentityAssign; // !=0 if has identity opAssign | |
| 69 FuncDeclaration cpctor; // generated copy-constructor, if any | |
| 70 | |
| 71 FuncDeclarations postblits; // Array of postblit functions | |
| 72 FuncDeclaration postblit; // aggregate postblit | |
| 73 } | |
| 74 | |
| 75 this(Loc loc, Identifier id) | |
| 76 { | |
| 77 super(loc, id); | |
| 78 | |
| 79 // For forward references | |
| 80 type = new TypeStruct(this); | |
| 81 | |
| 82 postblits = new FuncDeclarations(); /// | |
| 83 } | |
| 84 | |
| 72 | 85 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 86 { |
| 49 | 87 StructDeclaration sd; |
| 88 | |
| 89 if (s) | |
| 90 sd = cast(StructDeclaration)s; | |
| 91 else | |
| 92 sd = new StructDeclaration(loc, ident); | |
| 93 ScopeDsymbol.syntaxCopy(sd); | |
| 94 return sd; | |
| 0 | 95 } |
| 96 | |
| 72 | 97 override void semantic(Scope sc) |
| 0 | 98 { |
| 99 int i; | |
| 100 Scope sc2; | |
| 101 | |
| 102 //printf("+StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 103 | |
| 104 //static int count; if (++count == 20) *(char*)0=0; | |
| 105 | |
| 106 assert(type); | |
| 107 if (!members) // if forward reference | |
| 108 return; | |
| 109 | |
| 110 if (symtab) | |
| 111 { if (!scope_) | |
| 112 return; // semantic() already completed | |
| 113 } | |
| 114 else | |
| 115 symtab = new DsymbolTable(); | |
| 116 | |
| 117 Scope scx = null; | |
| 118 if (scope_) | |
| 119 { sc = scope_; | |
| 120 scx = scope_; // save so we don't make redundant copies | |
| 121 scope_ = null; | |
| 122 } | |
| 123 | |
| 124 parent = sc.parent; | |
| 125 type = type.semantic(loc, sc); | |
| 126 version (STRUCTTHISREF) { | |
| 127 handle = type; | |
| 128 } else { | |
| 129 handle = type.pointerTo(); | |
| 130 } | |
| 131 structalign = sc.structalign; | |
| 132 protection = sc.protection; | |
| 133 storage_class |= sc.stc; | |
| 134 if (sc.stc & STC.STCdeprecated) | |
| 135 isdeprecated = 1; | |
| 136 assert(!isAnonymous()); | |
| 137 if (sc.stc & STC.STCabstract) | |
| 138 error("structs, unions cannot be abstract"); | |
| 139 version (DMDV2) { | |
| 140 if (storage_class & STC.STCimmutable) | |
| 141 type = type.invariantOf(); | |
| 142 else if (storage_class & STC.STCconst) | |
| 143 type = type.constOf(); | |
| 144 else if (storage_class & STC.STCshared) | |
| 145 type = type.sharedOf(); | |
| 146 } | |
| 147 | |
| 148 if (sizeok == 0) // if not already done the addMember step | |
| 149 { | |
| 150 int hasfunctions = 0; | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
151 foreach(Dsymbol s; members) |
| 0 | 152 { |
| 153 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 154 s.addMember(sc, this, true); |
| 0 | 155 if (s.isFuncDeclaration()) |
| 156 hasfunctions = 1; | |
| 157 } | |
| 158 | |
| 159 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 160 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 161 { Dsymbol s = toParent2(); | |
| 162 if (s) | |
| 163 { | |
| 164 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 165 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 166 | |
| 167 TemplateInstance ti; | |
| 168 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 169 { isnested = true; | |
| 170 Type t; | |
| 171 if (ad) | |
| 172 t = ad.handle; | |
| 173 else if (fd) | |
| 174 { | |
| 175 AggregateDeclaration add = fd.isMember2(); | |
| 176 if (add) | |
| 177 t = add.handle; | |
| 178 else | |
| 179 t = Type.tvoidptr; | |
| 180 } | |
| 181 else | |
| 182 assert(0); | |
| 183 if (t.ty == TY.Tstruct) | |
| 184 t = Type.tvoidptr; // t should not be a ref type | |
| 185 assert(!vthis); | |
| 186 vthis = new ThisDeclaration(loc, t); | |
| 187 //vthis.storage_class |= STC.STCref; | |
|
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7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
188 members.push(vthis); |
| 0 | 189 } |
| 190 } | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 sizeok = 0; | |
| 195 sc2 = sc.push(this); | |
| 196 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 197 sc2.parent = this; | |
| 198 if (isUnionDeclaration()) | |
| 199 sc2.inunion = 1; | |
| 200 sc2.protection = PROT.PROTpublic; | |
| 201 sc2.explicitProtection = 0; | |
| 202 | |
| 203 int members_dim = members.dim; | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
204 foreach(Dsymbol s; members) |
| 0 | 205 { |
| 206 s.semantic(sc2); | |
| 207 if (isUnionDeclaration()) | |
| 208 sc2.offset = 0; | |
| 209 static if (false) { | |
| 210 if (sizeok == 2) | |
| 211 { //printf("forward reference\n"); | |
| 212 break; | |
| 213 } | |
| 214 } | |
| 215 Type t; | |
| 216 if (s.isDeclaration() && | |
| 217 (t = s.isDeclaration().type) !is null && | |
| 218 t.toBasetype().ty == TY.Tstruct) | |
| 219 { StructDeclaration sd = cast(StructDeclaration)t.toDsymbol(sc); | |
| 220 if (sd.isnested) | |
| 221 error("inner struct %s cannot be a field", sd.toChars()); | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 /* The TypeInfo_Struct is expecting an opEquals and opCmp with | |
| 226 * a parameter that is a pointer to the struct. But if there | |
| 227 * isn't one, but is an opEquals or opCmp with a value, write | |
| 228 * another that is a shell around the value: | |
| 229 * int opCmp(struct *p) { return opCmp(*p); } | |
| 230 */ | |
| 231 | |
| 232 TypeFunction tfeqptr; | |
| 233 { | |
| 234 Arguments arguments = new Arguments; | |
| 235 Argument arg = new Argument(STC.STCin, handle, Id.p, null); | |
| 236 | |
| 237 arguments.push(cast(void*)arg); | |
| 238 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 239 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 240 } | |
| 241 | |
| 242 TypeFunction tfeq; | |
| 243 { | |
| 244 Arguments arguments = new Arguments; | |
| 245 Argument arg = new Argument(STC.STCin, type, null, null); | |
| 246 | |
| 247 arguments.push(cast(void*)arg); | |
| 248 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 249 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 250 } | |
| 251 | |
| 252 Identifier id = Id.eq; | |
| 253 for (int j = 0; j < 2; j++) | |
| 254 { | |
| 255 Dsymbol s = search_function(this, id); | |
| 256 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 257 if (fdx) | |
| 258 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 259 if (!fd) | |
| 260 { fd = fdx.overloadExactMatch(tfeq); | |
| 261 if (fd) | |
| 262 { // Create the thunk, fdptr | |
| 263 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 264 Expression e = new IdentifierExp(loc, Id.p); | |
| 265 e = new PtrExp(loc, e); | |
| 266 Expressions args = new Expressions(); | |
| 267 args.push(cast(void*)e); | |
| 268 e = new IdentifierExp(loc, id); | |
| 269 e = new CallExp(loc, e, args); | |
| 270 fdptr.fbody = new ReturnStatement(loc, e); | |
| 271 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 272 assert(ss); | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
273 ss.members.push(fdptr); |
| 13 | 274 fdptr.addMember(sc, ss, true); |
| 0 | 275 fdptr.semantic(sc2); |
| 276 } | |
| 277 } | |
| 278 } | |
| 279 | |
| 280 id = Id.cmp; | |
| 281 } | |
| 282 version (DMDV2) { | |
| 283 dtor = buildDtor(sc2); | |
| 284 postblit = buildPostBlit(sc2); | |
| 285 cpctor = buildCpCtor(sc2); | |
| 286 buildOpAssign(sc2); | |
| 287 } | |
| 288 | |
| 289 sc2.pop(); | |
| 290 | |
| 291 if (sizeok == 2) | |
| 292 { // semantic() failed because of forward references. | |
| 293 // Unwind what we did, and defer it for later | |
| 294 fields.setDim(0); | |
| 295 structsize = 0; | |
| 296 alignsize = 0; | |
| 297 structalign = 0; | |
| 298 | |
| 299 scope_ = scx ? scx : new Scope(sc); | |
| 300 scope_.setNoFree(); | |
| 301 scope_.module_.addDeferredSemantic(this); | |
| 302 //printf("\tdeferring %s\n", toChars()); | |
| 303 return; | |
| 304 } | |
| 305 | |
| 306 // 0 sized struct's are set to 1 byte | |
| 307 if (structsize == 0) | |
| 308 { | |
| 309 structsize = 1; | |
| 310 alignsize = 1; | |
| 311 } | |
| 312 | |
| 313 // Round struct size up to next alignsize boundary. | |
| 314 // This will ensure that arrays of structs will get their internals | |
| 315 // aligned properly. | |
| 316 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 317 | |
| 318 sizeok = 1; | |
| 319 Module.dprogress++; | |
| 320 | |
| 321 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 322 | |
| 323 // Determine if struct is all zeros or not | |
| 324 zeroInit = true; | |
| 325 for (i = 0; i < fields.dim; i++) | |
| 326 { | |
| 327 Dsymbol s = cast(Dsymbol)fields.data[i]; | |
| 328 VarDeclaration vd = s.isVarDeclaration(); | |
| 329 if (vd && !vd.isDataseg()) | |
| 330 { | |
| 331 if (vd.init) | |
| 332 { | |
| 333 // Should examine init to see if it is really all 0's | |
| 334 zeroInit = false; | |
| 335 break; | |
| 336 } | |
| 337 else | |
| 338 { | |
| 339 if (!vd.type.isZeroInit(loc)) | |
| 340 { | |
| 341 zeroInit = false; | |
| 342 break; | |
| 343 } | |
| 344 } | |
| 345 } | |
| 346 } | |
| 347 | |
| 348 /* Look for special member functions. | |
| 349 */ | |
| 350 version (DMDV2) { | |
| 351 ctor = search(Loc(0), Id.ctor, 0); | |
| 352 } | |
| 353 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 354 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 355 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 356 | |
| 357 if (sc.func) | |
| 358 { | |
| 359 semantic2(sc); | |
| 360 semantic3(sc); | |
| 361 } | |
| 362 } | |
| 363 | |
| 72 | 364 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 365 { |
| 366 assert(false); | |
| 367 } | |
| 368 | |
| 72 | 369 override string mangle() |
| 0 | 370 { |
| 371 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 372 return Dsymbol.mangle(); | |
| 373 } | |
| 374 | |
| 72 | 375 override string kind() |
| 0 | 376 { |
| 377 assert(false); | |
| 378 } | |
| 379 | |
| 380 /******************************************* | |
| 381 * We need an opAssign for the struct if | |
| 382 * it has a destructor or a postblit. | |
| 383 * We need to generate one if a user-specified one does not exist. | |
| 384 */ | |
| 385 bool needOpAssign() | |
| 386 { | |
| 387 static if (false) { | |
| 388 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 389 } | |
| 390 if (hasIdentityAssign) | |
| 391 goto Ldontneed; | |
| 392 | |
| 393 if (dtor || postblit) | |
| 394 goto Lneed; | |
| 395 | |
| 396 /* If any of the fields need an opAssign, then we | |
| 397 * need it too. | |
| 398 */ | |
| 399 for (size_t i = 0; i < fields.dim; i++) | |
| 400 { | |
| 401 Dsymbol s = cast(Dsymbol)fields.data[i]; | |
| 402 VarDeclaration v = s.isVarDeclaration(); | |
| 403 assert(v && v.storage_class & STC.STCfield); | |
| 404 if (v.storage_class & STC.STCref) | |
| 405 continue; | |
| 406 Type tv = v.type.toBasetype(); | |
| 407 while (tv.ty == TY.Tsarray) | |
| 408 { TypeSArray ta = cast(TypeSArray)tv; | |
| 409 tv = tv.nextOf().toBasetype(); | |
| 410 } | |
| 411 if (tv.ty == TY.Tstruct) | |
| 412 { TypeStruct ts = cast(TypeStruct)tv; | |
| 413 StructDeclaration sd = ts.sym; | |
| 414 if (sd.needOpAssign()) | |
| 415 goto Lneed; | |
| 416 } | |
| 417 } | |
| 418 Ldontneed: | |
| 419 static if (false) { | |
| 420 printf("\tdontneed\n"); | |
| 421 } | |
| 422 return false; | |
| 423 | |
| 424 Lneed: | |
| 425 static if (false) { | |
| 426 printf("\tneed\n"); | |
| 427 } | |
| 428 return true; | |
| 429 } | |
| 430 | |
| 431 /****************************************** | |
| 432 * Build opAssign for struct. | |
| 433 * S* opAssign(S s) { ... } | |
| 434 */ | |
| 435 FuncDeclaration buildOpAssign(Scope sc) | |
| 436 { | |
| 437 if (!needOpAssign()) | |
| 438 return null; | |
| 439 | |
| 440 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 441 | |
| 442 FuncDeclaration fop = null; | |
| 443 | |
| 444 Argument param = new Argument(STC.STCnodtor, type, Id.p, null); | |
| 445 Arguments fparams = new Arguments; | |
| 446 fparams.push(cast(void*)param); | |
| 447 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); | |
| 448 version (STRUCTTHISREF) { | |
| 449 (cast(TypeFunction)ftype).isref = 1; | |
| 450 } | |
| 451 | |
| 452 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 453 | |
| 454 Expression e = null; | |
| 455 if (postblit) | |
| 456 { /* Swap: | |
| 457 * tmp = *this; *this = s; tmp.dtor(); | |
| 458 */ | |
| 459 //printf("\tswap copy\n"); | |
| 460 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 461 VarDeclaration tmp; | |
| 462 AssignExp ec = null; | |
| 463 if (dtor) | |
| 464 { | |
| 465 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 466 tmp.noauto = true; | |
| 467 e = new DeclarationExp(Loc(0), tmp); | |
| 468 | |
| 469 Expression e2; | |
| 470 version (STRUCTTHISREF) { | |
| 471 e2 = new ThisExp(Loc(0)); | |
| 472 } else { | |
| 473 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 474 } | |
| 475 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 476 ec.op = TOK.TOKblit; | |
| 477 e = Expression.combine(e, ec); | |
| 478 } | |
| 479 Expression e2; | |
| 480 version (STRUCTTHISREF) { | |
| 481 e2 = new ThisExp(Loc(0)); | |
| 482 } else { | |
| 483 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 484 } | |
| 485 | |
| 486 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); | |
| 487 ec.op = TOK.TOKblit; | |
| 488 e = Expression.combine(e, ec); | |
| 489 if (dtor) | |
| 490 { | |
| 491 /* Instead of running the destructor on s, run it | |
| 492 * on tmp. This avoids needing to copy tmp back in to s. | |
| 493 */ | |
| 494 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 495 ecc = new CallExp(Loc(0), ecc); | |
| 496 e = Expression.combine(e, ecc); | |
| 497 } | |
| 498 } | |
| 499 else | |
| 500 { /* Do memberwise copy | |
| 501 */ | |
| 502 //printf("\tmemberwise copy\n"); | |
| 503 for (size_t i = 0; i < fields.dim; i++) | |
| 504 { | |
| 505 Dsymbol s = cast(Dsymbol)fields.data[i]; | |
| 506 VarDeclaration v = s.isVarDeclaration(); | |
| 507 assert(v && v.storage_class & STC.STCfield); | |
| 508 // this.v = s.v; | |
| 509 AssignExp ec = new AssignExp(Loc(0), new DotVarExp(Loc(0), new ThisExp(Loc(0)), v, 0), new DotVarExp(Loc(0), new IdentifierExp(Loc(0), Id.p), v, 0)); | |
| 510 ec.op = TOK.TOKblit; | |
| 511 e = Expression.combine(e, ec); | |
| 512 } | |
| 513 } | |
| 514 Statement s1 = new ExpStatement(Loc(0), e); | |
| 515 | |
| 516 /* Add: | |
| 517 * return this; | |
| 518 */ | |
| 519 e = new ThisExp(Loc(0)); | |
| 520 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 521 | |
| 522 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 523 | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
524 members.push(fop); |
| 13 | 525 fop.addMember(sc, this, true); |
| 0 | 526 |
| 527 sc = sc.push(); | |
| 528 sc.stc = STC.STCundefined; | |
| 529 sc.linkage = LINK.LINKd; | |
| 530 | |
| 531 fop.semantic(sc); | |
| 532 | |
| 533 sc.pop(); | |
| 534 | |
| 535 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 536 | |
| 537 return fop; | |
| 538 } | |
| 539 | |
| 540 /***************************************** | |
| 541 * Create inclusive postblit for struct by aggregating | |
| 542 * all the postblits in postblits[] with the postblits for | |
| 543 * all the members. | |
| 544 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 545 * and the ordering changes (runs forward instead of backwards). | |
| 546 */ | |
| 547 | |
| 548 version (DMDV2) { | |
| 549 FuncDeclaration buildPostBlit(Scope sc) | |
| 550 { | |
| 551 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 552 Expression e = null; | |
| 553 | |
| 554 for (size_t i = 0; i < fields.dim; i++) | |
| 555 { | |
| 556 Dsymbol s = cast(Dsymbol)fields.data[i]; | |
| 557 VarDeclaration v = s.isVarDeclaration(); | |
| 558 assert(v && v.storage_class & STC.STCfield); | |
| 559 if (v.storage_class & STC.STCref) | |
| 560 continue; | |
| 561 Type tv = v.type.toBasetype(); | |
| 562 size_t dim = 1; | |
| 563 while (tv.ty == TY.Tsarray) | |
| 564 { TypeSArray ta = cast(TypeSArray)tv; | |
| 565 dim *= (cast(TypeSArray)tv).dim.toInteger(); | |
| 566 tv = tv.nextOf().toBasetype(); | |
| 567 } | |
| 568 if (tv.ty == TY.Tstruct) | |
| 569 { TypeStruct ts = cast(TypeStruct)tv; | |
| 570 StructDeclaration sd = ts.sym; | |
| 571 if (sd.postblit) | |
| 572 { Expression ex; | |
| 573 | |
| 574 // this.v | |
| 575 ex = new ThisExp(Loc(0)); | |
| 576 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 577 | |
| 578 if (dim == 1) | |
| 579 { // this.v.postblit() | |
| 580 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 581 ex = new CallExp(Loc(0), ex); | |
| 582 } | |
| 583 else | |
| 584 { | |
| 585 // Typeinfo.postblit(cast(void*)&this.v); | |
| 586 Expression ea = new AddrExp(Loc(0), ex); | |
| 587 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 588 | |
| 589 Expression et = v.type.getTypeInfo(sc); | |
| 590 et = new DotIdExp(Loc(0), et, Id.postblit); | |
| 591 | |
| 592 ex = new CallExp(Loc(0), et, ea); | |
| 593 } | |
| 594 e = Expression.combine(e, ex); // combine in forward order | |
| 595 } | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 /* Build our own "postblit" which executes e | |
| 600 */ | |
| 601 if (e) | |
| 602 { //printf("Building __fieldPostBlit()\n"); | |
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603 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); |
| 0 | 604 dd.fbody = new ExpStatement(Loc(0), e); |
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605 postblits.shift(dd); |
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606 members.push(dd); |
| 0 | 607 dd.semantic(sc); |
| 608 } | |
| 609 | |
| 610 switch (postblits.dim) | |
| 611 { | |
| 612 case 0: | |
| 613 return null; | |
| 614 | |
| 615 case 1: | |
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616 return cast(FuncDeclaration)postblits[0]; |
| 0 | 617 |
| 618 default: | |
| 619 e = null; | |
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620 foreach(FuncDeclaration fd; postblits) |
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621 { |
| 0 | 622 Expression ex = new ThisExp(Loc(0)); |
| 623 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 624 ex = new CallExp(Loc(0), ex); | |
| 625 e = Expression.combine(e, ex); | |
| 626 } | |
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627 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 0 | 628 dd.fbody = new ExpStatement(Loc(0), e); |
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629 members.push(dd); |
| 0 | 630 dd.semantic(sc); |
| 631 return dd; | |
| 632 } | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 /******************************************* | |
| 637 * Build copy constructor for struct. | |
| 638 * Copy constructors are compiler generated only, and are only | |
| 639 * callable from the compiler. They are not user accessible. | |
| 640 * A copy constructor is: | |
| 641 * void cpctpr(ref S s) | |
| 642 * { | |
| 643 * *this = s; | |
| 644 * this.postBlit(); | |
| 645 * } | |
| 646 * This is done so: | |
| 647 * - postBlit() never sees uninitialized data | |
| 648 * - memcpy can be much more efficient than memberwise copy | |
| 649 * - no fields are overlooked | |
| 650 */ | |
| 651 FuncDeclaration buildCpCtor(Scope sc) | |
| 652 { | |
| 653 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 654 FuncDeclaration fcp = null; | |
| 655 | |
| 656 /* Copy constructor is only necessary if there is a postblit function, | |
| 657 * otherwise the code generator will just do a bit copy. | |
| 658 */ | |
| 659 if (postblit) | |
| 660 { | |
| 661 //printf("generating cpctor\n"); | |
| 662 | |
| 663 Argument param = new Argument(STC.STCref, type, Id.p, null); | |
| 664 Arguments fparams = new Arguments; | |
| 665 fparams.push(cast(void*)param); | |
| 666 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 667 | |
| 668 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); | |
| 669 | |
| 670 // Build *this = p; | |
| 671 Expression e = new ThisExp(Loc(0)); | |
| 672 version (STRUCTTHISREF) { | |
| 673 } else { | |
| 674 e = new PtrExp(Loc(0), e); | |
| 675 } | |
| 676 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); | |
| 677 ea.op = TOK.TOKblit; | |
| 678 Statement s = new ExpStatement(Loc(0), ea); | |
| 679 | |
| 680 // Build postBlit(); | |
| 681 e = new VarExp(Loc(0), postblit, 0); | |
| 682 e = new CallExp(Loc(0), e); | |
| 683 | |
| 684 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); | |
| 685 fcp.fbody = s; | |
| 686 | |
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687 members.push(fcp); |
| 0 | 688 |
| 689 sc = sc.push(); | |
| 690 sc.stc = STC.STCundefined; | |
| 691 sc.linkage = LINK.LINKd; | |
| 692 | |
| 693 fcp.semantic(sc); | |
| 694 | |
| 695 sc.pop(); | |
| 696 } | |
| 697 | |
| 698 return fcp; | |
| 699 } | |
| 700 | |
| 72 | 701 override void toDocBuffer(OutBuffer buf) |
| 0 | 702 { |
| 703 assert(false); | |
| 704 } | |
| 705 | |
| 72 | 706 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 707 { |
| 708 assert(false); | |
| 709 } | |
| 710 | |
| 72 | 711 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 712 { |
| 713 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 714 | |
| 715 if (multiobj) | |
| 716 { | |
| 717 obj_append(this); | |
| 718 return; | |
| 719 } | |
| 720 | |
| 721 // Anonymous structs/unions only exist as part of others, | |
| 722 // do not output forward referenced structs's | |
| 723 if (!isAnonymous() && members) | |
| 724 { | |
| 725 if (global.params.symdebug) { | |
| 726 toDebug(); | |
| 727 } | |
| 728 | |
| 729 type.getTypeInfo(null); // generate TypeInfo | |
| 730 | |
| 731 if (true) | |
| 732 { | |
| 733 // Generate static initializer | |
| 734 toInitializer(); | |
| 735 | |
| 736 static if (false) { | |
| 737 sinit.Sclass = SC.SCcomdat; | |
| 738 } else { | |
| 739 if (inTemplateInstance()) | |
| 740 { | |
| 741 sinit.Sclass = SC.SCcomdat; | |
| 742 } | |
| 743 else | |
| 744 { | |
| 745 sinit.Sclass = SC.SCglobal; | |
| 746 } | |
| 747 } | |
| 748 sinit.Sfl = FL.FLdata; | |
| 749 | |
| 750 toDt(&sinit.Sdt); | |
| 751 | |
| 752 version (OMFOBJ) { | |
| 753 /* For OMF, common blocks aren't pulled in from the library. | |
| 754 */ | |
| 755 /* ELF comdef's generate multiple | |
| 756 * definition errors for them from the gnu linker. | |
| 757 * Need to figure out how to generate proper comdef's for ELF. | |
| 758 */ | |
| 759 // See if we can convert a comdat to a comdef, | |
| 760 // which saves on exe file space. | |
| 761 if (sinit.Sclass == SCcomdat && | |
| 762 sinit.Sdt && | |
| 763 sinit.Sdt.dt == DT.DT_azeros && | |
| 764 sinit.Sdt.DTnext == null && | |
| 765 !global.params.multiobj) | |
| 766 { | |
| 767 sinit.Sclass = SC.SCglobal; | |
| 768 sinit.Sdt.dt = DT.DT_common; | |
| 769 } | |
| 770 } | |
| 771 | |
| 772 version (ELFOBJ) { | |
| 773 sinit.Sseg = Segment.CDATA; | |
| 774 } | |
| 775 version (MACHOBJ) { | |
| 776 sinit.Sseg = Segment.DATA; | |
| 777 } | |
| 778 outdata(sinit); | |
| 779 } | |
| 780 | |
| 781 // Put out the members | |
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782 foreach(Dsymbol member; members) |
| 0 | 783 member.toObjFile(0); |
| 784 } | |
| 785 } | |
| 786 | |
| 787 void toDt(dt_t** pdt) | |
| 788 { | |
| 789 uint offset; | |
| 790 uint i; | |
| 791 dt_t* dt; | |
| 792 | |
| 793 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 794 offset = 0; | |
| 795 | |
| 796 // Note equivalence of this loop to class's | |
| 797 for (i = 0; i < fields.dim; i++) | |
| 798 { | |
| 799 VarDeclaration v = cast(VarDeclaration)fields.data[i]; | |
| 800 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); | |
| 801 dt = null; | |
| 802 int sz; | |
| 803 | |
| 804 if (v.storage_class & STC.STCref) | |
| 805 { | |
| 806 sz = PTRSIZE; | |
| 807 if (v.offset >= offset) | |
| 808 dtnzeros(&dt, sz); | |
| 809 } | |
| 810 else | |
| 811 { | |
| 812 sz = cast(uint)v.type.size(); | |
| 813 Initializer init = v.init; | |
| 814 if (init) | |
| 815 { | |
| 816 //printf("\t\thas initializer %s\n", init.toChars()); | |
| 817 ExpInitializer ei = init.isExpInitializer(); | |
| 818 Type tb = v.type.toBasetype(); | |
| 819 if (ei && tb.ty == TY.Tsarray) | |
| 820 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 821 else | |
| 822 dt = init.toDt(); | |
| 823 } | |
| 824 else if (v.offset >= offset) | |
| 825 v.type.toDt(&dt); | |
| 826 } | |
| 827 if (dt) | |
| 828 { | |
| 829 if (v.offset < offset) | |
| 830 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 831 else | |
| 832 { | |
| 833 if (offset < v.offset) | |
| 834 dtnzeros(pdt, v.offset - offset); | |
| 835 dtcat(pdt, dt); | |
| 836 offset = v.offset + sz; | |
| 837 } | |
| 838 } | |
| 839 } | |
| 840 | |
| 841 if (offset < structsize) | |
| 842 dtnzeros(pdt, structsize - offset); | |
| 843 | |
| 844 dt_optimize(*pdt); | |
| 845 } | |
| 846 | |
| 847 void toDebug() // to symbolic debug info | |
| 848 { | |
| 849 assert(false); | |
| 850 } | |
| 851 | |
| 72 | 852 override StructDeclaration isStructDeclaration() { return this; } |
| 853 } |