Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 89:37b95c347975
Fixed an obscure bug with i variable being reused
| author | korDen |
|---|---|
| date | Mon, 30 Aug 2010 23:25:50 +0400 |
| parents | 23280d154c5b |
| children | ae5b11064a9a |
| 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 Scope sc2; | |
| 100 | |
| 101 //printf("+StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 102 | |
| 103 //static int count; if (++count == 20) *(char*)0=0; | |
| 104 | |
| 105 assert(type); | |
| 106 if (!members) // if forward reference | |
| 107 return; | |
| 108 | |
| 109 if (symtab) | |
| 110 { if (!scope_) | |
| 111 return; // semantic() already completed | |
| 112 } | |
| 113 else | |
| 114 symtab = new DsymbolTable(); | |
| 115 | |
| 116 Scope scx = null; | |
| 117 if (scope_) | |
| 118 { sc = scope_; | |
| 119 scx = scope_; // save so we don't make redundant copies | |
| 120 scope_ = null; | |
| 121 } | |
| 122 | |
| 123 parent = sc.parent; | |
| 124 type = type.semantic(loc, sc); | |
| 125 version (STRUCTTHISREF) { | |
| 126 handle = type; | |
| 127 } else { | |
| 128 handle = type.pointerTo(); | |
| 129 } | |
| 130 structalign = sc.structalign; | |
| 131 protection = sc.protection; | |
| 132 storage_class |= sc.stc; | |
| 133 if (sc.stc & STC.STCdeprecated) | |
| 134 isdeprecated = 1; | |
| 135 assert(!isAnonymous()); | |
| 136 if (sc.stc & STC.STCabstract) | |
| 137 error("structs, unions cannot be abstract"); | |
| 138 version (DMDV2) { | |
| 139 if (storage_class & STC.STCimmutable) | |
| 140 type = type.invariantOf(); | |
| 141 else if (storage_class & STC.STCconst) | |
| 142 type = type.constOf(); | |
| 143 else if (storage_class & STC.STCshared) | |
| 144 type = type.sharedOf(); | |
| 145 } | |
| 146 | |
| 147 if (sizeok == 0) // if not already done the addMember step | |
| 148 { | |
| 149 int hasfunctions = 0; | |
|
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more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
150 foreach(Dsymbol s; members) |
| 0 | 151 { |
| 152 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 153 s.addMember(sc, this, true); |
| 0 | 154 if (s.isFuncDeclaration()) |
| 155 hasfunctions = 1; | |
| 156 } | |
| 157 | |
| 158 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 159 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 160 { Dsymbol s = toParent2(); | |
| 161 if (s) | |
| 162 { | |
| 163 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 164 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 165 | |
| 166 TemplateInstance ti; | |
| 167 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 168 { isnested = true; | |
| 169 Type t; | |
| 170 if (ad) | |
| 171 t = ad.handle; | |
| 172 else if (fd) | |
| 173 { | |
| 174 AggregateDeclaration add = fd.isMember2(); | |
| 175 if (add) | |
| 176 t = add.handle; | |
| 177 else | |
| 178 t = Type.tvoidptr; | |
| 179 } | |
| 180 else | |
| 181 assert(0); | |
| 182 if (t.ty == TY.Tstruct) | |
| 183 t = Type.tvoidptr; // t should not be a ref type | |
| 184 assert(!vthis); | |
| 185 vthis = new ThisDeclaration(loc, t); | |
| 186 //vthis.storage_class |= STC.STCref; | |
|
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Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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changeset
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187 members.push(vthis); |
| 0 | 188 } |
| 189 } | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 sizeok = 0; | |
| 194 sc2 = sc.push(this); | |
| 195 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 196 sc2.parent = this; | |
| 197 if (isUnionDeclaration()) | |
| 198 sc2.inunion = 1; | |
| 199 sc2.protection = PROT.PROTpublic; | |
| 200 sc2.explicitProtection = 0; | |
| 201 | |
| 202 int members_dim = members.dim; | |
|
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more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
203 foreach(Dsymbol s; members) |
| 0 | 204 { |
| 205 s.semantic(sc2); | |
| 206 if (isUnionDeclaration()) | |
| 207 sc2.offset = 0; | |
| 208 static if (false) { | |
| 209 if (sizeok == 2) | |
| 210 { //printf("forward reference\n"); | |
| 211 break; | |
| 212 } | |
| 213 } | |
| 214 Type t; | |
| 215 if (s.isDeclaration() && | |
| 216 (t = s.isDeclaration().type) !is null && | |
| 217 t.toBasetype().ty == TY.Tstruct) | |
| 218 { StructDeclaration sd = cast(StructDeclaration)t.toDsymbol(sc); | |
| 219 if (sd.isnested) | |
| 220 error("inner struct %s cannot be a field", sd.toChars()); | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 /* The TypeInfo_Struct is expecting an opEquals and opCmp with | |
| 225 * a parameter that is a pointer to the struct. But if there | |
| 226 * isn't one, but is an opEquals or opCmp with a value, write | |
| 227 * another that is a shell around the value: | |
| 228 * int opCmp(struct *p) { return opCmp(*p); } | |
| 229 */ | |
| 230 | |
| 231 TypeFunction tfeqptr; | |
| 232 { | |
| 233 Arguments arguments = new Arguments; | |
| 234 Argument arg = new Argument(STC.STCin, handle, Id.p, null); | |
| 235 | |
| 236 arguments.push(cast(void*)arg); | |
| 237 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 238 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 239 } | |
| 240 | |
| 241 TypeFunction tfeq; | |
| 242 { | |
| 243 Arguments arguments = new Arguments; | |
| 244 Argument arg = new Argument(STC.STCin, type, null, null); | |
| 245 | |
| 246 arguments.push(cast(void*)arg); | |
| 247 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 248 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 249 } | |
| 250 | |
| 251 Identifier id = Id.eq; | |
| 252 for (int j = 0; j < 2; j++) | |
| 253 { | |
| 254 Dsymbol s = search_function(this, id); | |
| 255 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 256 if (fdx) | |
| 257 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 258 if (!fd) | |
| 259 { fd = fdx.overloadExactMatch(tfeq); | |
| 260 if (fd) | |
| 261 { // Create the thunk, fdptr | |
| 262 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 263 Expression e = new IdentifierExp(loc, Id.p); | |
| 264 e = new PtrExp(loc, e); | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
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265 auto args = new Expressions(); |
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be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
79
diff
changeset
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266 args.push(e); |
| 0 | 267 e = new IdentifierExp(loc, id); |
| 268 e = new CallExp(loc, e, args); | |
| 269 fdptr.fbody = new ReturnStatement(loc, e); | |
| 270 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 271 assert(ss); | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
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diff
changeset
|
272 ss.members.push(fdptr); |
| 13 | 273 fdptr.addMember(sc, ss, true); |
| 0 | 274 fdptr.semantic(sc2); |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 id = Id.cmp; | |
| 280 } | |
| 281 version (DMDV2) { | |
| 282 dtor = buildDtor(sc2); | |
| 283 postblit = buildPostBlit(sc2); | |
| 284 cpctor = buildCpCtor(sc2); | |
| 285 buildOpAssign(sc2); | |
| 286 } | |
| 287 | |
| 288 sc2.pop(); | |
| 289 | |
| 290 if (sizeok == 2) | |
| 291 { // semantic() failed because of forward references. | |
| 292 // Unwind what we did, and defer it for later | |
| 293 fields.setDim(0); | |
| 294 structsize = 0; | |
| 295 alignsize = 0; | |
| 296 structalign = 0; | |
| 297 | |
|
87
b17640f0e4e8
Fixed a bug with a Scope.this(Scope enclosing) being called instead of Scope.clone() method (as a copy ctor replacement)
korDen
parents:
79
diff
changeset
|
298 scope_ = scx ? scx : sc.clone(); |
| 0 | 299 scope_.setNoFree(); |
| 300 scope_.module_.addDeferredSemantic(this); | |
| 301 //printf("\tdeferring %s\n", toChars()); | |
| 302 return; | |
| 303 } | |
| 304 | |
| 305 // 0 sized struct's are set to 1 byte | |
| 306 if (structsize == 0) | |
| 307 { | |
| 308 structsize = 1; | |
| 309 alignsize = 1; | |
| 310 } | |
| 311 | |
| 312 // Round struct size up to next alignsize boundary. | |
| 313 // This will ensure that arrays of structs will get their internals | |
| 314 // aligned properly. | |
| 315 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 316 | |
| 317 sizeok = 1; | |
| 318 Module.dprogress++; | |
| 319 | |
| 320 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 321 | |
| 322 // Determine if struct is all zeros or not | |
| 323 zeroInit = true; | |
|
85
8e69d041a99d
Previous commit didn't compile. Fixed.
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
84
diff
changeset
|
324 foreach (VarDeclaration vd; fields) |
| 0 | 325 { |
| 79 | 326 if (vd && !vd.isDataseg()) |
| 0 | 327 { |
| 79 | 328 if (vd.init) |
| 329 { | |
| 330 // Should examine init to see if it is really all 0's | |
| 0 | 331 zeroInit = false; |
| 332 break; | |
| 79 | 333 } |
| 334 else | |
| 335 { | |
| 336 if (!vd.type.isZeroInit(loc)) | |
| 337 { | |
| 338 zeroInit = false; | |
| 339 break; | |
| 340 } | |
| 341 } | |
| 0 | 342 } |
| 343 } | |
| 344 | |
| 345 /* Look for special member functions. | |
| 346 */ | |
| 347 version (DMDV2) { | |
| 348 ctor = search(Loc(0), Id.ctor, 0); | |
| 349 } | |
| 350 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 351 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 352 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 353 | |
| 354 if (sc.func) | |
| 355 { | |
| 356 semantic2(sc); | |
| 357 semantic3(sc); | |
| 358 } | |
| 359 } | |
| 360 | |
| 72 | 361 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 362 { |
| 363 assert(false); | |
| 364 } | |
| 365 | |
| 72 | 366 override string mangle() |
| 0 | 367 { |
| 368 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 369 return Dsymbol.mangle(); | |
| 370 } | |
| 371 | |
| 72 | 372 override string kind() |
| 0 | 373 { |
| 374 assert(false); | |
| 375 } | |
| 376 | |
| 377 /******************************************* | |
| 378 * We need an opAssign for the struct if | |
| 379 * it has a destructor or a postblit. | |
| 380 * We need to generate one if a user-specified one does not exist. | |
| 381 */ | |
| 382 bool needOpAssign() | |
| 383 { | |
| 384 static if (false) { | |
| 385 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 386 } | |
| 387 if (hasIdentityAssign) | |
| 388 goto Ldontneed; | |
| 389 | |
| 390 if (dtor || postblit) | |
| 391 goto Lneed; | |
| 392 | |
| 393 /* If any of the fields need an opAssign, then we | |
| 394 * need it too. | |
| 395 */ | |
|
85
8e69d041a99d
Previous commit didn't compile. Fixed.
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
84
diff
changeset
|
396 foreach (VarDeclaration v; fields) |
| 0 | 397 { |
| 398 assert(v && v.storage_class & STC.STCfield); | |
| 399 if (v.storage_class & STC.STCref) | |
| 400 continue; | |
| 401 Type tv = v.type.toBasetype(); | |
| 402 while (tv.ty == TY.Tsarray) | |
| 403 { TypeSArray ta = cast(TypeSArray)tv; | |
| 404 tv = tv.nextOf().toBasetype(); | |
| 405 } | |
| 406 if (tv.ty == TY.Tstruct) | |
| 407 { TypeStruct ts = cast(TypeStruct)tv; | |
| 408 StructDeclaration sd = ts.sym; | |
| 409 if (sd.needOpAssign()) | |
| 410 goto Lneed; | |
| 411 } | |
| 412 } | |
| 413 Ldontneed: | |
| 414 static if (false) { | |
| 415 printf("\tdontneed\n"); | |
| 416 } | |
| 417 return false; | |
| 418 | |
| 419 Lneed: | |
| 420 static if (false) { | |
| 421 printf("\tneed\n"); | |
| 422 } | |
| 423 return true; | |
| 424 } | |
| 425 | |
| 426 /****************************************** | |
| 427 * Build opAssign for struct. | |
| 428 * S* opAssign(S s) { ... } | |
| 429 */ | |
| 430 FuncDeclaration buildOpAssign(Scope sc) | |
| 431 { | |
| 432 if (!needOpAssign()) | |
| 433 return null; | |
| 434 | |
| 435 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 436 | |
| 437 FuncDeclaration fop = null; | |
| 438 | |
| 439 Argument param = new Argument(STC.STCnodtor, type, Id.p, null); | |
| 440 Arguments fparams = new Arguments; | |
| 441 fparams.push(cast(void*)param); | |
| 442 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); | |
| 443 version (STRUCTTHISREF) { | |
| 444 (cast(TypeFunction)ftype).isref = 1; | |
| 445 } | |
| 446 | |
| 447 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 448 | |
| 449 Expression e = null; | |
| 450 if (postblit) | |
| 451 { /* Swap: | |
| 452 * tmp = *this; *this = s; tmp.dtor(); | |
| 453 */ | |
| 454 //printf("\tswap copy\n"); | |
| 455 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 456 VarDeclaration tmp; | |
| 457 AssignExp ec = null; | |
| 458 if (dtor) | |
| 459 { | |
| 460 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 461 tmp.noauto = true; | |
| 462 e = new DeclarationExp(Loc(0), tmp); | |
| 463 | |
| 464 Expression e2; | |
| 465 version (STRUCTTHISREF) { | |
| 466 e2 = new ThisExp(Loc(0)); | |
| 467 } else { | |
| 468 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 469 } | |
| 470 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 471 ec.op = TOK.TOKblit; | |
| 472 e = Expression.combine(e, ec); | |
| 473 } | |
| 474 Expression e2; | |
| 475 version (STRUCTTHISREF) { | |
| 476 e2 = new ThisExp(Loc(0)); | |
| 477 } else { | |
| 478 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 479 } | |
| 480 | |
| 481 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); | |
| 482 ec.op = TOK.TOKblit; | |
| 483 e = Expression.combine(e, ec); | |
| 484 if (dtor) | |
| 485 { | |
| 486 /* Instead of running the destructor on s, run it | |
| 487 * on tmp. This avoids needing to copy tmp back in to s. | |
| 488 */ | |
| 489 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 490 ecc = new CallExp(Loc(0), ecc); | |
| 491 e = Expression.combine(e, ecc); | |
| 492 } | |
| 493 } | |
| 494 else | |
| 495 { /* Do memberwise copy | |
| 496 */ | |
| 497 //printf("\tmemberwise copy\n"); | |
|
85
8e69d041a99d
Previous commit didn't compile. Fixed.
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
84
diff
changeset
|
498 foreach (VarDeclaration v; fields) |
| 0 | 499 { |
| 500 assert(v && v.storage_class & STC.STCfield); | |
| 501 // this.v = s.v; | |
| 502 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)); | |
| 503 ec.op = TOK.TOKblit; | |
| 504 e = Expression.combine(e, ec); | |
| 505 } | |
| 506 } | |
| 507 Statement s1 = new ExpStatement(Loc(0), e); | |
| 508 | |
| 509 /* Add: | |
| 510 * return this; | |
| 511 */ | |
| 512 e = new ThisExp(Loc(0)); | |
| 513 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 514 | |
| 515 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 516 | |
|
74
7e0d548de9e6
Switch Arrays of Dsymbols to the new templated Vector type
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
72
diff
changeset
|
517 members.push(fop); |
| 13 | 518 fop.addMember(sc, this, true); |
| 0 | 519 |
| 520 sc = sc.push(); | |
| 521 sc.stc = STC.STCundefined; | |
| 522 sc.linkage = LINK.LINKd; | |
| 523 | |
| 524 fop.semantic(sc); | |
| 525 | |
| 526 sc.pop(); | |
| 527 | |
| 528 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 529 | |
| 530 return fop; | |
| 531 } | |
| 532 | |
| 533 /***************************************** | |
| 534 * Create inclusive postblit for struct by aggregating | |
| 535 * all the postblits in postblits[] with the postblits for | |
| 536 * all the members. | |
| 537 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 538 * and the ordering changes (runs forward instead of backwards). | |
| 539 */ | |
| 540 | |
| 541 version (DMDV2) { | |
| 542 FuncDeclaration buildPostBlit(Scope sc) | |
| 543 { | |
| 544 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 545 Expression e = null; | |
| 546 | |
|
85
8e69d041a99d
Previous commit didn't compile. Fixed.
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
84
diff
changeset
|
547 foreach (VarDeclaration v; fields) |
| 0 | 548 { |
| 79 | 549 assert(v && v.storage_class & STC.STCfield); |
| 550 if (v.storage_class & STC.STCref) | |
| 551 continue; | |
| 552 Type tv = v.type.toBasetype(); | |
| 553 size_t dim = 1; | |
| 554 while (tv.ty == TY.Tsarray) | |
| 555 { TypeSArray ta = cast(TypeSArray)tv; | |
| 556 dim *= (cast(TypeSArray)tv).dim.toInteger(); | |
| 557 tv = tv.nextOf().toBasetype(); | |
| 0 | 558 } |
| 79 | 559 if (tv.ty == TY.Tstruct) |
| 560 { TypeStruct ts = cast(TypeStruct)tv; | |
| 561 StructDeclaration sd = ts.sym; | |
| 562 if (sd.postblit) | |
| 563 { Expression ex; | |
| 564 | |
| 565 // this.v | |
| 566 ex = new ThisExp(Loc(0)); | |
| 567 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 568 | |
| 569 if (dim == 1) | |
| 570 { // this.v.postblit() | |
| 571 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 572 ex = new CallExp(Loc(0), ex); | |
| 573 } | |
| 574 else | |
| 575 { | |
| 576 // Typeinfo.postblit(cast(void*)&this.v); | |
| 577 Expression ea = new AddrExp(Loc(0), ex); | |
| 578 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 579 | |
| 580 Expression et = v.type.getTypeInfo(sc); | |
| 581 et = new DotIdExp(Loc(0), et, Id.postblit); | |
| 582 | |
| 583 ex = new CallExp(Loc(0), et, ea); | |
| 584 } | |
| 585 e = Expression.combine(e, ex); // combine in forward order | |
| 586 } | |
| 0 | 587 } |
| 588 } | |
| 589 | |
| 590 /* Build our own "postblit" which executes e | |
| 591 */ | |
| 592 if (e) | |
| 593 { //printf("Building __fieldPostBlit()\n"); | |
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594 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); |
| 0 | 595 dd.fbody = new ExpStatement(Loc(0), e); |
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596 postblits.shift(dd); |
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597 members.push(dd); |
| 0 | 598 dd.semantic(sc); |
| 599 } | |
| 600 | |
| 601 switch (postblits.dim) | |
| 602 { | |
| 603 case 0: | |
| 604 return null; | |
| 605 | |
| 606 case 1: | |
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607 return cast(FuncDeclaration)postblits[0]; |
| 0 | 608 |
| 609 default: | |
| 610 e = null; | |
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611 foreach(FuncDeclaration fd; postblits) |
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612 { |
| 0 | 613 Expression ex = new ThisExp(Loc(0)); |
| 614 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 615 ex = new CallExp(Loc(0), ex); | |
| 616 e = Expression.combine(e, ex); | |
| 617 } | |
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618 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 0 | 619 dd.fbody = new ExpStatement(Loc(0), e); |
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620 members.push(dd); |
| 0 | 621 dd.semantic(sc); |
| 622 return dd; | |
| 623 } | |
| 624 } | |
| 625 } | |
| 626 | |
| 627 /******************************************* | |
| 628 * Build copy constructor for struct. | |
| 629 * Copy constructors are compiler generated only, and are only | |
| 630 * callable from the compiler. They are not user accessible. | |
| 631 * A copy constructor is: | |
| 632 * void cpctpr(ref S s) | |
| 633 * { | |
| 634 * *this = s; | |
| 635 * this.postBlit(); | |
| 636 * } | |
| 637 * This is done so: | |
| 638 * - postBlit() never sees uninitialized data | |
| 639 * - memcpy can be much more efficient than memberwise copy | |
| 640 * - no fields are overlooked | |
| 641 */ | |
| 642 FuncDeclaration buildCpCtor(Scope sc) | |
| 643 { | |
| 644 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 645 FuncDeclaration fcp = null; | |
| 646 | |
| 647 /* Copy constructor is only necessary if there is a postblit function, | |
| 648 * otherwise the code generator will just do a bit copy. | |
| 649 */ | |
| 650 if (postblit) | |
| 651 { | |
| 652 //printf("generating cpctor\n"); | |
| 653 | |
| 654 Argument param = new Argument(STC.STCref, type, Id.p, null); | |
| 655 Arguments fparams = new Arguments; | |
| 656 fparams.push(cast(void*)param); | |
| 657 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 658 | |
| 659 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); | |
| 660 | |
| 661 // Build *this = p; | |
| 662 Expression e = new ThisExp(Loc(0)); | |
| 663 version (STRUCTTHISREF) { | |
| 664 } else { | |
| 665 e = new PtrExp(Loc(0), e); | |
| 666 } | |
| 667 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); | |
| 668 ea.op = TOK.TOKblit; | |
| 669 Statement s = new ExpStatement(Loc(0), ea); | |
| 670 | |
| 671 // Build postBlit(); | |
| 672 e = new VarExp(Loc(0), postblit, 0); | |
| 673 e = new CallExp(Loc(0), e); | |
| 674 | |
| 675 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); | |
| 676 fcp.fbody = s; | |
| 677 | |
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678 members.push(fcp); |
| 0 | 679 |
| 680 sc = sc.push(); | |
| 681 sc.stc = STC.STCundefined; | |
| 682 sc.linkage = LINK.LINKd; | |
| 683 | |
| 684 fcp.semantic(sc); | |
| 685 | |
| 686 sc.pop(); | |
| 687 } | |
| 688 | |
| 689 return fcp; | |
| 690 } | |
| 691 | |
| 72 | 692 override void toDocBuffer(OutBuffer buf) |
| 0 | 693 { |
| 694 assert(false); | |
| 695 } | |
| 696 | |
| 72 | 697 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 698 { |
| 699 assert(false); | |
| 700 } | |
| 701 | |
| 72 | 702 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 703 { |
| 704 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 705 | |
| 706 if (multiobj) | |
| 707 { | |
| 708 obj_append(this); | |
| 709 return; | |
| 710 } | |
| 711 | |
| 712 // Anonymous structs/unions only exist as part of others, | |
| 713 // do not output forward referenced structs's | |
| 714 if (!isAnonymous() && members) | |
| 715 { | |
| 716 if (global.params.symdebug) { | |
| 717 toDebug(); | |
| 718 } | |
| 719 | |
| 720 type.getTypeInfo(null); // generate TypeInfo | |
| 721 | |
| 722 if (true) | |
| 723 { | |
| 724 // Generate static initializer | |
| 725 toInitializer(); | |
| 726 | |
| 727 static if (false) { | |
| 728 sinit.Sclass = SC.SCcomdat; | |
| 729 } else { | |
| 730 if (inTemplateInstance()) | |
| 731 { | |
| 732 sinit.Sclass = SC.SCcomdat; | |
| 733 } | |
| 734 else | |
| 735 { | |
| 736 sinit.Sclass = SC.SCglobal; | |
| 737 } | |
| 738 } | |
| 739 sinit.Sfl = FL.FLdata; | |
| 740 | |
| 741 toDt(&sinit.Sdt); | |
| 742 | |
| 743 version (OMFOBJ) { | |
| 744 /* For OMF, common blocks aren't pulled in from the library. | |
| 745 */ | |
| 746 /* ELF comdef's generate multiple | |
| 747 * definition errors for them from the gnu linker. | |
| 748 * Need to figure out how to generate proper comdef's for ELF. | |
| 749 */ | |
| 750 // See if we can convert a comdat to a comdef, | |
| 751 // which saves on exe file space. | |
| 752 if (sinit.Sclass == SCcomdat && | |
| 753 sinit.Sdt && | |
| 754 sinit.Sdt.dt == DT.DT_azeros && | |
| 755 sinit.Sdt.DTnext == null && | |
| 756 !global.params.multiobj) | |
| 757 { | |
| 758 sinit.Sclass = SC.SCglobal; | |
| 759 sinit.Sdt.dt = DT.DT_common; | |
| 760 } | |
| 761 } | |
| 762 | |
| 763 version (ELFOBJ) { | |
| 764 sinit.Sseg = Segment.CDATA; | |
| 765 } | |
| 766 version (MACHOBJ) { | |
| 767 sinit.Sseg = Segment.DATA; | |
| 768 } | |
| 769 outdata(sinit); | |
| 770 } | |
| 771 | |
| 772 // Put out the members | |
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773 foreach(Dsymbol member; members) |
| 0 | 774 member.toObjFile(0); |
| 775 } | |
| 776 } | |
| 777 | |
| 778 void toDt(dt_t** pdt) | |
| 779 { | |
| 780 uint offset; | |
| 781 dt_t* dt; | |
| 782 | |
| 783 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 784 offset = 0; | |
| 785 | |
| 786 // Note equivalence of this loop to class's | |
| 79 | 787 for (uint i = 0; i < fields.dim; i++) |
| 0 | 788 { |
| 79 | 789 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 790 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 791 dt = null; | |
| 792 int sz; | |
| 793 | |
| 794 if (v.storage_class & STC.STCref) | |
| 795 { | |
| 796 sz = PTRSIZE; | |
| 797 if (v.offset >= offset) | |
| 798 dtnzeros(&dt, sz); | |
| 799 } | |
| 800 else | |
| 801 { | |
| 802 sz = cast(uint)v.type.size(); | |
| 803 Initializer init = v.init; | |
| 804 if (init) | |
| 805 { | |
| 806 //printf("\t\thas initializer %s\n", init.toChars()); | |
| 807 ExpInitializer ei = init.isExpInitializer(); | |
| 808 Type tb = v.type.toBasetype(); | |
| 809 if (ei && tb.ty == TY.Tsarray) | |
| 810 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 811 else | |
| 812 dt = init.toDt(); | |
| 813 } | |
| 814 else if (v.offset >= offset) | |
| 815 v.type.toDt(&dt); | |
| 816 } | |
| 817 if (dt) | |
| 818 { | |
| 819 if (v.offset < offset) | |
| 820 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 821 else | |
| 822 { | |
| 823 if (offset < v.offset) | |
| 824 dtnzeros(pdt, v.offset - offset); | |
| 825 dtcat(pdt, dt); | |
| 826 offset = v.offset + sz; | |
| 827 } | |
| 828 } | |
| 829 } | |
| 830 | |
| 831 if (offset < structsize) | |
| 832 dtnzeros(pdt, structsize - offset); | |
| 833 | |
| 834 dt_optimize(*pdt); | |
| 835 } | |
| 836 | |
| 837 void toDebug() // to symbolic debug info | |
| 838 { | |
| 839 assert(false); | |
| 840 } | |
| 841 | |
| 72 | 842 override StructDeclaration isStructDeclaration() { return this; } |
| 843 } |