Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 135:af1bebfd96a4 dmd2037
dmd 2.038
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 13 Sep 2010 22:19:42 +0100 |
| parents | 206db751bd4c |
| children | 90821c10b6a7 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.StructDeclaration; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.AggregateDeclaration; |
| 5 import dmd.FuncDeclaration; | |
| 6 import dmd.DeclarationExp; | |
| 7 import dmd.VoidInitializer; | |
| 8 import dmd.Initializer; | |
| 9 import dmd.ExpInitializer; | |
| 10 import dmd.TOK; | |
| 11 import dmd.Statement; | |
| 12 import dmd.VarExp; | |
| 13 import dmd.CompoundStatement; | |
| 14 import dmd.AssignExp; | |
| 15 import dmd.DotVarExp; | |
| 16 import dmd.AddrExp; | |
| 17 import dmd.CastExp; | |
| 18 import dmd.PostBlitDeclaration; | |
| 19 import dmd.Lexer; | |
| 20 import dmd.ExpStatement; | |
| 21 import dmd.DotIdExp; | |
| 22 import dmd.TypeSArray; | |
| 23 import dmd.ThisExp; | |
| 24 import dmd.ThisDeclaration; | |
| 25 import dmd.TypeFunction; | |
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26 import dmd.Parameter; |
| 0 | 27 import dmd.Id; |
| 28 import dmd.TY; | |
| 29 import dmd.LINK; | |
| 30 import dmd.Type; | |
| 31 import dmd.DsymbolTable; | |
| 32 import dmd.ArrayTypes; | |
| 33 import dmd.Loc; | |
| 34 import dmd.STC; | |
| 35 import dmd.Identifier; | |
| 36 import dmd.TemplateInstance; | |
| 37 import dmd.Dsymbol; | |
| 38 import dmd.Scope; | |
| 39 import dmd.OutBuffer; | |
| 40 import dmd.HdrGenState; | |
| 41 import dmd.PROT; | |
| 42 import dmd.TypeStruct; | |
| 43 import dmd.expression.Util; | |
| 44 import dmd.Expression; | |
| 45 import dmd.IdentifierExp; | |
| 46 import dmd.PtrExp; | |
| 47 import dmd.CallExp; | |
| 48 import dmd.ReturnStatement; | |
| 49 import dmd.ScopeDsymbol; | |
| 50 import dmd.Module; | |
| 51 import dmd.VarDeclaration; | |
| 52 import dmd.InvariantDeclaration; | |
| 53 import dmd.NewDeclaration; | |
| 54 import dmd.DeleteDeclaration; | |
| 55 import dmd.Global; | |
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56 import dmd.MOD; |
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57 import dmd.IntegerExp; |
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58 import dmd.EqualExp; |
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59 import dmd.AndAndExp; |
| 0 | 60 |
| 61 import dmd.backend.dt_t; | |
| 62 import dmd.backend.Util; | |
| 63 import dmd.backend.SC; | |
| 64 import dmd.backend.DT; | |
| 65 import dmd.backend.FL; | |
| 66 import dmd.backend.glue; | |
| 67 | |
| 129 | 68 import std.stdio; |
| 69 | |
| 0 | 70 class StructDeclaration : AggregateDeclaration |
| 71 { | |
| 72 bool zeroInit; // true if initialize with 0 fill | |
| 73 | |
| 74 version (DMDV2) { | |
| 75 int hasIdentityAssign; // !=0 if has identity opAssign | |
| 76 FuncDeclaration cpctor; // generated copy-constructor, if any | |
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77 FuncDeclaration eq; // bool opEquals(ref const T), if any |
| 0 | 78 |
| 79 FuncDeclarations postblits; // Array of postblit functions | |
| 80 FuncDeclaration postblit; // aggregate postblit | |
| 81 } | |
| 82 | |
| 83 this(Loc loc, Identifier id) | |
| 84 { | |
| 85 super(loc, id); | |
| 86 | |
| 87 // For forward references | |
| 88 type = new TypeStruct(this); | |
| 89 | |
| 90 postblits = new FuncDeclarations(); /// | |
| 91 } | |
| 92 | |
| 72 | 93 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 94 { |
| 49 | 95 StructDeclaration sd; |
| 96 | |
| 97 if (s) | |
| 98 sd = cast(StructDeclaration)s; | |
| 99 else | |
| 100 sd = new StructDeclaration(loc, ident); | |
| 101 ScopeDsymbol.syntaxCopy(sd); | |
| 102 return sd; | |
| 0 | 103 } |
| 104 | |
| 72 | 105 override void semantic(Scope sc) |
| 0 | 106 { |
| 107 Scope sc2; | |
| 108 | |
| 109 //printf("+StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 110 | |
| 111 //static int count; if (++count == 20) *(char*)0=0; | |
| 112 | |
| 113 assert(type); | |
| 114 if (!members) // if forward reference | |
| 115 return; | |
| 116 | |
| 117 if (symtab) | |
| 118 { if (!scope_) | |
| 119 return; // semantic() already completed | |
| 120 } | |
| 121 else | |
| 122 symtab = new DsymbolTable(); | |
| 123 | |
| 124 Scope scx = null; | |
| 125 if (scope_) | |
| 126 { sc = scope_; | |
| 127 scx = scope_; // save so we don't make redundant copies | |
| 128 scope_ = null; | |
| 129 } | |
| 130 | |
| 131 parent = sc.parent; | |
| 132 type = type.semantic(loc, sc); | |
| 133 version (STRUCTTHISREF) { | |
| 134 handle = type; | |
| 135 } else { | |
| 136 handle = type.pointerTo(); | |
| 137 } | |
| 138 structalign = sc.structalign; | |
| 139 protection = sc.protection; | |
| 140 storage_class |= sc.stc; | |
| 141 if (sc.stc & STC.STCdeprecated) | |
| 142 isdeprecated = 1; | |
| 143 assert(!isAnonymous()); | |
| 144 if (sc.stc & STC.STCabstract) | |
| 145 error("structs, unions cannot be abstract"); | |
| 146 version (DMDV2) { | |
| 147 if (storage_class & STC.STCimmutable) | |
| 148 type = type.invariantOf(); | |
| 149 else if (storage_class & STC.STCconst) | |
| 150 type = type.constOf(); | |
| 151 else if (storage_class & STC.STCshared) | |
| 152 type = type.sharedOf(); | |
| 153 } | |
| 154 | |
| 155 if (sizeok == 0) // if not already done the addMember step | |
| 156 { | |
| 157 int hasfunctions = 0; | |
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158 foreach(Dsymbol s; members) |
| 0 | 159 { |
| 160 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 161 s.addMember(sc, this, true); |
| 0 | 162 if (s.isFuncDeclaration()) |
| 163 hasfunctions = 1; | |
| 164 } | |
| 165 | |
| 166 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 167 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 168 { Dsymbol s = toParent2(); | |
| 169 if (s) | |
| 170 { | |
| 171 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 172 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 173 | |
| 174 TemplateInstance ti; | |
| 175 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 176 { isnested = true; | |
| 177 Type t; | |
| 178 if (ad) | |
| 179 t = ad.handle; | |
| 180 else if (fd) | |
| 181 { | |
| 182 AggregateDeclaration add = fd.isMember2(); | |
| 183 if (add) | |
| 184 t = add.handle; | |
| 185 else | |
| 186 t = Type.tvoidptr; | |
| 187 } | |
| 188 else | |
| 189 assert(0); | |
| 190 if (t.ty == TY.Tstruct) | |
| 191 t = Type.tvoidptr; // t should not be a ref type | |
| 192 assert(!vthis); | |
| 193 vthis = new ThisDeclaration(loc, t); | |
| 194 //vthis.storage_class |= STC.STCref; | |
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195 members.push(vthis); |
| 0 | 196 } |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 sizeok = 0; | |
| 202 sc2 = sc.push(this); | |
| 203 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 204 sc2.parent = this; | |
| 205 if (isUnionDeclaration()) | |
| 206 sc2.inunion = 1; | |
| 207 sc2.protection = PROT.PROTpublic; | |
| 208 sc2.explicitProtection = 0; | |
| 209 | |
| 135 | 210 |
| 211 /* Set scope so if there are forward references, we still might be able to | |
| 212 * resolve individual members like enums. | |
| 213 */ | |
| 214 foreach (s; members) | |
| 215 { | |
| 216 /* There are problems doing this in the general case because | |
| 217 * Scope keeps track of things like 'offset' | |
| 218 */ | |
| 219 if (s.isEnumDeclaration() || (s.isAggregateDeclaration() && s.ident)) | |
| 220 { | |
| 221 //printf("setScope %s %s\n", s->kind(), s->toChars()); | |
| 222 s.setScope(sc2); | |
| 223 } | |
| 224 } | |
| 225 | |
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226 foreach(Dsymbol s; members) |
| 0 | 227 { |
| 129 | 228 s.semantic(sc2); |
| 229 if (isUnionDeclaration()) | |
| 230 sc2.offset = 0; | |
| 0 | 231 static if (false) { |
| 129 | 232 if (sizeok == 2) |
| 233 { //printf("forward reference\n"); | |
| 234 break; | |
| 235 } | |
| 0 | 236 } |
| 129 | 237 if (auto d = s.isDeclaration()) |
| 238 { | |
| 239 if (auto t = d.type) { | |
| 240 if (t.toBasetype().ty == TY.Tstruct) { | |
| 241 auto ad = t.toDsymbol(sc).isThis(); | |
| 242 /* | |
| 243 StructDeclaration sd = cast(StructDeclaration)foo; | |
| 244 if (foo && !sd) { | |
| 245 writeln(t.classin); | |
| 246 writeln(foo.classinfo.name); | |
| 247 assert(false); | |
| 248 } | |
| 249 */ | |
| 250 if (ad && ad.isnested) | |
| 251 error("inner struct %s cannot be a field", ad.toChars()); | |
| 252 } | |
| 253 } | |
| 254 } | |
| 0 | 255 } |
| 256 | |
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257 version(DMDV1) { |
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258 /* This doesn't work for DMDV2 because (ref S) and (S) parameter |
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259 * lists will overload the same. |
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260 */ |
| 0 | 261 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
| 262 * a parameter that is a pointer to the struct. But if there | |
| 263 * isn't one, but is an opEquals or opCmp with a value, write | |
| 264 * another that is a shell around the value: | |
| 265 * int opCmp(struct *p) { return opCmp(*p); } | |
| 266 */ | |
| 267 | |
| 268 TypeFunction tfeqptr; | |
| 269 { | |
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270 auto arguments = new Parameters; |
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271 auto arg = new Parameter(STC.STCin, handle, Id.p, null); |
| 0 | 272 |
| 129 | 273 arguments.push(arg); |
| 274 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 275 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 0 | 276 } |
| 277 | |
| 278 TypeFunction tfeq; | |
| 279 { | |
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280 auto arguments = new Parameters; |
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281 auto arg = new Parameter(STC.STCin, type, null, null); |
| 0 | 282 |
| 129 | 283 arguments.push(arg); |
| 284 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 285 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 0 | 286 } |
| 287 | |
| 288 Identifier id = Id.eq; | |
| 289 for (int j = 0; j < 2; j++) | |
| 290 { | |
| 291 Dsymbol s = search_function(this, id); | |
| 292 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 293 if (fdx) | |
| 294 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 295 if (!fd) | |
| 296 { fd = fdx.overloadExactMatch(tfeq); | |
| 297 if (fd) | |
| 298 { // Create the thunk, fdptr | |
| 299 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 300 Expression e = new IdentifierExp(loc, Id.p); | |
| 301 e = new PtrExp(loc, e); | |
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302 auto args = new Expressions(); |
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303 args.push(e); |
| 0 | 304 e = new IdentifierExp(loc, id); |
| 305 e = new CallExp(loc, e, args); | |
| 306 fdptr.fbody = new ReturnStatement(loc, e); | |
| 307 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 308 assert(ss); | |
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309 ss.members.push(fdptr); |
| 13 | 310 fdptr.addMember(sc, ss, true); |
| 0 | 311 fdptr.semantic(sc2); |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 id = Id.cmp; | |
| 317 } | |
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318 } |
| 0 | 319 version (DMDV2) { |
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320 /* Try to find the opEquals function. Build it if necessary. |
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321 */ |
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322 TypeFunction tfeqptr; |
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323 { // bool opEquals(const T*) const; |
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324 auto parameters = new Parameters; |
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325 version(STRUCTTHISREF) { |
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326 // bool opEquals(ref const T) const; |
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327 auto param = new Parameter(STC.STCref, type.constOf(), null, null); |
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328 } else { |
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329 // bool opEquals(const T*) const; |
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330 auto param = new Parameter(STC.STCin, type.pointerTo(), null, null); |
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331 } |
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332 |
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333 parameters.push(param); |
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334 tfeqptr = new TypeFunction(parameters, Type.tbool, 0, LINK.LINKd); |
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335 tfeqptr.mod = MOD.MODconst; |
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336 tfeqptr = cast(TypeFunction)(tfeqptr.semantic(Loc(0), sc2)); |
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337 |
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338 Dsymbol s = search_function(this, Id.eq); |
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339 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; |
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340 if (fdx) |
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341 { |
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342 eq = fdx.overloadExactMatch(tfeqptr); |
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343 if (!eq) |
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344 fdx.error("type signature should be %s not %s", tfeqptr.toChars(), fdx.type.toChars()); |
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345 } |
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346 |
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347 if (!eq) |
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348 eq = buildOpEquals(sc2); |
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349 } |
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350 |
| 0 | 351 dtor = buildDtor(sc2); |
| 352 postblit = buildPostBlit(sc2); | |
| 353 cpctor = buildCpCtor(sc2); | |
| 354 buildOpAssign(sc2); | |
| 355 } | |
| 356 | |
| 357 sc2.pop(); | |
| 358 | |
| 359 if (sizeok == 2) | |
| 360 { // semantic() failed because of forward references. | |
| 361 // Unwind what we did, and defer it for later | |
| 362 fields.setDim(0); | |
| 363 structsize = 0; | |
| 364 alignsize = 0; | |
| 365 structalign = 0; | |
| 366 | |
|
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367 scope_ = scx ? scx : sc.clone(); |
| 0 | 368 scope_.setNoFree(); |
| 369 scope_.module_.addDeferredSemantic(this); | |
| 370 //printf("\tdeferring %s\n", toChars()); | |
| 371 return; | |
| 372 } | |
| 373 | |
| 374 // 0 sized struct's are set to 1 byte | |
| 375 if (structsize == 0) | |
| 376 { | |
| 377 structsize = 1; | |
| 378 alignsize = 1; | |
| 379 } | |
| 380 | |
| 381 // Round struct size up to next alignsize boundary. | |
| 382 // This will ensure that arrays of structs will get their internals | |
| 383 // aligned properly. | |
| 384 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 385 | |
| 386 sizeok = 1; | |
| 387 Module.dprogress++; | |
| 388 | |
| 389 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 390 | |
| 391 // Determine if struct is all zeros or not | |
| 392 zeroInit = true; | |
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393 foreach (VarDeclaration vd; fields) |
| 0 | 394 { |
| 79 | 395 if (vd && !vd.isDataseg()) |
| 0 | 396 { |
| 79 | 397 if (vd.init) |
| 398 { | |
| 399 // Should examine init to see if it is really all 0's | |
| 0 | 400 zeroInit = false; |
| 401 break; | |
| 79 | 402 } |
| 403 else | |
| 404 { | |
| 405 if (!vd.type.isZeroInit(loc)) | |
| 406 { | |
| 407 zeroInit = false; | |
| 408 break; | |
| 409 } | |
| 410 } | |
| 0 | 411 } |
| 412 } | |
| 413 | |
| 414 /* Look for special member functions. | |
| 415 */ | |
| 416 version (DMDV2) { | |
| 417 ctor = search(Loc(0), Id.ctor, 0); | |
| 418 } | |
| 419 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 420 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 421 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 422 | |
| 423 if (sc.func) | |
| 424 { | |
| 425 semantic2(sc); | |
| 426 semantic3(sc); | |
| 427 } | |
| 428 } | |
| 429 | |
| 135 | 430 Dsymbol search(Loc loc, Identifier ident, int flags) |
| 431 { | |
| 432 //printf("%s.StructDeclaration::search('%s')\n", toChars(), ident->toChars()); | |
| 433 | |
| 434 if (scope_) | |
| 435 semantic(scope_); | |
| 436 | |
| 437 if (!members || !symtab) | |
| 438 { | |
| 439 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 440 return null; | |
| 441 } | |
| 442 | |
| 443 return ScopeDsymbol.search(loc, ident, flags); | |
| 444 } | |
| 445 | |
| 72 | 446 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 447 { |
| 448 assert(false); | |
| 449 } | |
| 450 | |
| 72 | 451 override string mangle() |
| 0 | 452 { |
| 453 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 454 return Dsymbol.mangle(); | |
| 455 } | |
| 456 | |
| 72 | 457 override string kind() |
| 0 | 458 { |
| 459 assert(false); | |
| 460 } | |
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461 |
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462 version(DMDV1) |
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463 { |
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464 Expression cloneMembers() |
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465 { |
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466 assert(false); |
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467 } |
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468 } |
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469 |
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470 version(DMDV2) |
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471 { |
| 0 | 472 /******************************************* |
| 473 * We need an opAssign for the struct if | |
| 474 * it has a destructor or a postblit. | |
| 475 * We need to generate one if a user-specified one does not exist. | |
| 476 */ | |
| 477 bool needOpAssign() | |
| 478 { | |
| 479 static if (false) { | |
| 480 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 481 } | |
| 482 if (hasIdentityAssign) | |
| 483 goto Ldontneed; | |
| 484 | |
| 485 if (dtor || postblit) | |
| 486 goto Lneed; | |
| 487 | |
| 488 /* If any of the fields need an opAssign, then we | |
| 489 * need it too. | |
| 490 */ | |
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491 foreach (VarDeclaration v; fields) |
| 0 | 492 { |
| 493 assert(v && v.storage_class & STC.STCfield); | |
| 494 if (v.storage_class & STC.STCref) | |
| 495 continue; | |
| 496 Type tv = v.type.toBasetype(); | |
| 497 while (tv.ty == TY.Tsarray) | |
| 498 { TypeSArray ta = cast(TypeSArray)tv; | |
| 499 tv = tv.nextOf().toBasetype(); | |
| 500 } | |
| 501 if (tv.ty == TY.Tstruct) | |
| 502 { TypeStruct ts = cast(TypeStruct)tv; | |
| 503 StructDeclaration sd = ts.sym; | |
| 504 if (sd.needOpAssign()) | |
| 505 goto Lneed; | |
| 506 } | |
| 507 } | |
| 508 Ldontneed: | |
| 509 static if (false) { | |
| 510 printf("\tdontneed\n"); | |
| 511 } | |
| 512 return false; | |
| 513 | |
| 514 Lneed: | |
| 515 static if (false) { | |
| 516 printf("\tneed\n"); | |
| 517 } | |
| 518 return true; | |
| 519 } | |
| 520 | |
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521 /******************************************* |
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522 * We need an opEquals for the struct if |
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523 * any fields has an opEquals. |
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524 * Generate one if a user-specified one does not exist. |
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525 */ |
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526 bool needOpEquals() |
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527 { |
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528 enum X = 0; |
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529 static if (X) printf("StructDeclaration::needOpEquals() %s\n", toChars()); |
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530 |
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531 /* If any of the fields has an opEquals, then we |
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532 * need it too. |
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533 */ |
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534 foreach (s; fields) |
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535 { |
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536 VarDeclaration v = s.isVarDeclaration(); |
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537 assert(v && v.storage_class & STC.STCfield); |
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538 if (v.storage_class & STC.STCref) |
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539 continue; |
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540 Type tv = v.type.toBasetype(); |
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541 while (tv.ty == Tsarray) |
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542 { auto ta = cast(TypeSArray)tv; |
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543 tv = tv.nextOf().toBasetype(); |
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544 } |
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545 if (tv.ty == Tstruct) |
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546 { auto ts = cast(TypeStruct)tv; |
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547 StructDeclaration sd = ts.sym; |
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548 if (sd.eq) |
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549 goto Lneed; |
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550 } |
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551 } |
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552 Ldontneed: |
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553 static if (X) printf("\tdontneed\n"); |
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554 return false; |
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555 |
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556 Lneed: |
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557 static if (X) printf("\tneed\n"); |
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558 return true; |
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559 } |
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560 |
| 0 | 561 /****************************************** |
| 562 * Build opAssign for struct. | |
| 563 * S* opAssign(S s) { ... } | |
| 564 */ | |
| 565 FuncDeclaration buildOpAssign(Scope sc) | |
| 566 { | |
| 567 if (!needOpAssign()) | |
| 568 return null; | |
| 569 | |
| 570 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 571 | |
| 572 FuncDeclaration fop = null; | |
| 573 | |
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574 auto param = new Parameter(STC.STCnodtor, type, Id.p, null); |
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575 auto fparams = new Parameters; |
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576 fparams.push(param); |
| 0 | 577 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); |
| 578 version (STRUCTTHISREF) { | |
| 579 (cast(TypeFunction)ftype).isref = 1; | |
| 580 } | |
| 581 | |
| 582 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 583 | |
| 584 Expression e = null; | |
| 585 if (postblit) | |
| 586 { /* Swap: | |
| 587 * tmp = *this; *this = s; tmp.dtor(); | |
| 588 */ | |
| 589 //printf("\tswap copy\n"); | |
| 590 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 591 VarDeclaration tmp; | |
| 592 AssignExp ec = null; | |
| 593 if (dtor) | |
| 594 { | |
| 595 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 596 tmp.noauto = true; | |
| 597 e = new DeclarationExp(Loc(0), tmp); | |
| 598 | |
| 599 Expression e2; | |
| 600 version (STRUCTTHISREF) { | |
| 601 e2 = new ThisExp(Loc(0)); | |
| 602 } else { | |
| 603 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 604 } | |
| 605 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 606 ec.op = TOK.TOKblit; | |
| 607 e = Expression.combine(e, ec); | |
| 608 } | |
| 609 Expression e2; | |
| 610 version (STRUCTTHISREF) { | |
| 611 e2 = new ThisExp(Loc(0)); | |
| 612 } else { | |
| 613 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 614 } | |
| 615 | |
| 616 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); | |
| 617 ec.op = TOK.TOKblit; | |
| 618 e = Expression.combine(e, ec); | |
| 619 if (dtor) | |
| 620 { | |
| 621 /* Instead of running the destructor on s, run it | |
| 622 * on tmp. This avoids needing to copy tmp back in to s. | |
| 623 */ | |
| 624 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 625 ecc = new CallExp(Loc(0), ecc); | |
| 626 e = Expression.combine(e, ecc); | |
| 627 } | |
| 628 } | |
| 629 else | |
| 630 { /* Do memberwise copy | |
| 631 */ | |
| 632 //printf("\tmemberwise copy\n"); | |
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633 foreach (VarDeclaration v; fields) |
| 0 | 634 { |
| 635 assert(v && v.storage_class & STC.STCfield); | |
| 636 // this.v = s.v; | |
| 637 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)); | |
| 638 ec.op = TOK.TOKblit; | |
| 639 e = Expression.combine(e, ec); | |
| 640 } | |
| 641 } | |
| 642 Statement s1 = new ExpStatement(Loc(0), e); | |
| 643 | |
| 644 /* Add: | |
| 645 * return this; | |
| 646 */ | |
| 647 e = new ThisExp(Loc(0)); | |
| 648 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 649 | |
| 650 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 651 | |
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652 members.push(fop); |
| 13 | 653 fop.addMember(sc, this, true); |
| 0 | 654 |
| 655 sc = sc.push(); | |
| 656 sc.stc = STC.STCundefined; | |
| 657 sc.linkage = LINK.LINKd; | |
| 658 | |
| 659 fop.semantic(sc); | |
| 660 | |
| 661 sc.pop(); | |
| 662 | |
| 663 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 664 | |
| 665 return fop; | |
| 666 } | |
| 667 | |
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668 /****************************************** |
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669 * Build opEquals for struct. |
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670 * const bool opEquals(const ref S s) { ... } |
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671 */ |
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672 FuncDeclaration buildOpEquals(Scope sc) |
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673 { |
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674 if (!needOpEquals()) |
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675 return null; |
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676 //printf("StructDeclaration::buildOpEquals() %s\n", toChars()); |
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677 Loc loc = this.loc; |
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678 |
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679 auto parameters = new Parameters; |
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680 version (STRUCTTHISREF) { |
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681 // bool opEquals(ref const T) const; |
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682 auto param = new Parameter(STC.STCref, type.constOf(), Id.p, null); |
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683 } else { |
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684 // bool opEquals(const T*) const; |
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685 auto param = new Parameter(STC.STCin, type.pointerTo(), Id.p, null); |
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686 } |
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687 |
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688 parameters.push(param); |
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689 auto ftype = new TypeFunction(parameters, Type.tbool, 0, LINKd); |
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690 ftype.mod = MOD.MODconst; |
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691 ftype = cast(TypeFunction)ftype.semantic(loc, sc); |
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692 |
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693 auto fop = new FuncDeclaration(loc, Loc(0), Id.eq, STC.STCundefined, ftype); |
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694 |
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695 Expression e = null; |
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696 /* Do memberwise compare |
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697 */ |
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698 //printf("\tmemberwise compare\n"); |
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699 foreach (s; fields) |
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700 { |
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701 VarDeclaration v = s.isVarDeclaration(); |
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702 assert(v && v.storage_class & STC.STCfield); |
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703 if (v.storage_class & STC.STCref) |
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704 assert(0); // what should we do with this? |
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705 // this.v == s.v; |
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706 auto ec = new EqualExp(TOKequal, loc, |
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707 new DotVarExp(loc, new ThisExp(loc), v, 0), |
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708 new DotVarExp(loc, new IdentifierExp(loc, Id.p), v, 0)); |
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709 if (e) |
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710 e = new AndAndExp(loc, e, ec); |
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711 else |
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712 e = ec; |
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713 } |
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714 if (!e) |
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715 e = new IntegerExp(loc, 1, Type.tbool); |
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716 fop.fbody = new ReturnStatement(loc, e); |
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717 |
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718 members.push(fop); |
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719 fop.addMember(sc, this, 1); |
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720 |
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721 sc = sc.push(); |
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722 sc.stc = 0; |
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723 sc.linkage = LINK.LINKd; |
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724 |
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725 fop.semantic(sc); |
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726 |
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727 sc.pop(); |
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728 |
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729 //printf("-StructDeclaration::buildOpEquals() %s\n", toChars()); |
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730 |
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731 return fop; |
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732 } |
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733 |
| 0 | 734 /***************************************** |
| 735 * Create inclusive postblit for struct by aggregating | |
| 736 * all the postblits in postblits[] with the postblits for | |
| 737 * all the members. | |
| 738 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 739 * and the ordering changes (runs forward instead of backwards). | |
| 740 */ | |
| 741 | |
| 742 version (DMDV2) { | |
| 743 FuncDeclaration buildPostBlit(Scope sc) | |
| 744 { | |
| 745 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 746 Expression e = null; | |
| 747 | |
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748 foreach (VarDeclaration v; fields) |
| 0 | 749 { |
| 79 | 750 assert(v && v.storage_class & STC.STCfield); |
| 751 if (v.storage_class & STC.STCref) | |
| 752 continue; | |
| 753 Type tv = v.type.toBasetype(); | |
| 754 size_t dim = 1; | |
| 755 while (tv.ty == TY.Tsarray) | |
| 756 { TypeSArray ta = cast(TypeSArray)tv; | |
| 757 dim *= (cast(TypeSArray)tv).dim.toInteger(); | |
| 758 tv = tv.nextOf().toBasetype(); | |
| 0 | 759 } |
| 79 | 760 if (tv.ty == TY.Tstruct) |
| 761 { TypeStruct ts = cast(TypeStruct)tv; | |
| 762 StructDeclaration sd = ts.sym; | |
| 763 if (sd.postblit) | |
| 764 { Expression ex; | |
| 765 | |
| 766 // this.v | |
| 767 ex = new ThisExp(Loc(0)); | |
| 768 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 769 | |
| 770 if (dim == 1) | |
| 771 { // this.v.postblit() | |
| 772 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 773 ex = new CallExp(Loc(0), ex); | |
| 774 } | |
| 775 else | |
| 776 { | |
| 777 // Typeinfo.postblit(cast(void*)&this.v); | |
| 778 Expression ea = new AddrExp(Loc(0), ex); | |
| 779 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 780 | |
| 781 Expression et = v.type.getTypeInfo(sc); | |
| 103 | 782 et = new DotIdExp(Loc(0), et, Id._postblit); |
| 79 | 783 |
| 784 ex = new CallExp(Loc(0), et, ea); | |
| 785 } | |
| 786 e = Expression.combine(e, ex); // combine in forward order | |
| 787 } | |
| 0 | 788 } |
| 789 } | |
| 790 | |
| 791 /* Build our own "postblit" which executes e | |
| 792 */ | |
| 793 if (e) | |
| 794 { //printf("Building __fieldPostBlit()\n"); | |
|
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795 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); |
| 0 | 796 dd.fbody = new ExpStatement(Loc(0), e); |
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797 postblits.shift(dd); |
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798 members.push(dd); |
| 0 | 799 dd.semantic(sc); |
| 800 } | |
| 801 | |
| 802 switch (postblits.dim) | |
| 803 { | |
| 804 case 0: | |
| 805 return null; | |
| 806 | |
| 807 case 1: | |
|
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808 return cast(FuncDeclaration)postblits[0]; |
| 0 | 809 |
| 810 default: | |
| 811 e = null; | |
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812 foreach(FuncDeclaration fd; postblits) |
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813 { |
| 0 | 814 Expression ex = new ThisExp(Loc(0)); |
| 815 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 816 ex = new CallExp(Loc(0), ex); | |
| 817 e = Expression.combine(e, ex); | |
| 818 } | |
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819 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 0 | 820 dd.fbody = new ExpStatement(Loc(0), e); |
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821 members.push(dd); |
| 0 | 822 dd.semantic(sc); |
| 823 return dd; | |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 /******************************************* | |
| 829 * Build copy constructor for struct. | |
| 830 * Copy constructors are compiler generated only, and are only | |
| 831 * callable from the compiler. They are not user accessible. | |
| 832 * A copy constructor is: | |
| 833 * void cpctpr(ref S s) | |
| 834 * { | |
| 835 * *this = s; | |
| 836 * this.postBlit(); | |
| 837 * } | |
| 838 * This is done so: | |
| 839 * - postBlit() never sees uninitialized data | |
| 840 * - memcpy can be much more efficient than memberwise copy | |
| 841 * - no fields are overlooked | |
| 842 */ | |
| 843 FuncDeclaration buildCpCtor(Scope sc) | |
| 844 { | |
| 845 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 846 FuncDeclaration fcp = null; | |
| 847 | |
| 848 /* Copy constructor is only necessary if there is a postblit function, | |
| 849 * otherwise the code generator will just do a bit copy. | |
| 850 */ | |
| 851 if (postblit) | |
| 852 { | |
| 129 | 853 //printf("generating cpctor\n"); |
| 0 | 854 |
|
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855 auto param = new Parameter(STC.STCref, type, Id.p, null); |
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856 auto fparams = new Parameters; |
| 129 | 857 fparams.push(param); |
| 858 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 0 | 859 |
| 129 | 860 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); |
| 0 | 861 |
| 129 | 862 // Build *this = p; |
| 863 Expression e = new ThisExp(Loc(0)); | |
| 0 | 864 version (STRUCTTHISREF) { |
| 865 } else { | |
| 129 | 866 e = new PtrExp(Loc(0), e); |
| 0 | 867 } |
| 129 | 868 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); |
| 869 ea.op = TOK.TOKblit; | |
| 870 Statement s = new ExpStatement(Loc(0), ea); | |
| 0 | 871 |
| 129 | 872 // Build postBlit(); |
| 873 e = new VarExp(Loc(0), postblit, 0); | |
| 874 e = new CallExp(Loc(0), e); | |
| 0 | 875 |
| 129 | 876 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); |
| 877 fcp.fbody = s; | |
| 0 | 878 |
| 129 | 879 members.push(fcp); |
| 0 | 880 |
| 129 | 881 sc = sc.push(); |
| 882 sc.stc = STC.STCundefined; | |
| 883 sc.linkage = LINK.LINKd; | |
| 0 | 884 |
| 129 | 885 fcp.semantic(sc); |
| 0 | 886 |
| 129 | 887 sc.pop(); |
| 0 | 888 } |
| 889 | |
| 890 return fcp; | |
| 891 } | |
|
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892 } |
| 72 | 893 override void toDocBuffer(OutBuffer buf) |
| 0 | 894 { |
| 895 assert(false); | |
| 896 } | |
| 897 | |
| 72 | 898 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 899 { |
| 900 assert(false); | |
| 901 } | |
| 902 | |
| 72 | 903 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 904 { |
| 905 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 906 | |
| 907 if (multiobj) | |
| 908 { | |
| 909 obj_append(this); | |
| 910 return; | |
| 911 } | |
| 912 | |
| 913 // Anonymous structs/unions only exist as part of others, | |
| 914 // do not output forward referenced structs's | |
| 915 if (!isAnonymous() && members) | |
| 916 { | |
| 917 if (global.params.symdebug) { | |
| 918 toDebug(); | |
| 919 } | |
| 920 | |
| 921 type.getTypeInfo(null); // generate TypeInfo | |
| 922 | |
| 923 if (true) | |
| 924 { | |
| 925 // Generate static initializer | |
| 926 toInitializer(); | |
| 927 | |
| 928 static if (false) { | |
| 929 sinit.Sclass = SC.SCcomdat; | |
| 930 } else { | |
| 931 if (inTemplateInstance()) | |
| 932 { | |
| 933 sinit.Sclass = SC.SCcomdat; | |
| 934 } | |
| 935 else | |
| 936 { | |
| 937 sinit.Sclass = SC.SCglobal; | |
| 938 } | |
| 939 } | |
| 940 sinit.Sfl = FL.FLdata; | |
| 941 | |
| 942 toDt(&sinit.Sdt); | |
| 943 | |
| 95 | 944 version (OMFOBJ) |
| 945 { | |
| 0 | 946 /* For OMF, common blocks aren't pulled in from the library. |
| 947 */ | |
| 948 /* ELF comdef's generate multiple | |
| 949 * definition errors for them from the gnu linker. | |
| 950 * Need to figure out how to generate proper comdef's for ELF. | |
| 951 */ | |
| 952 // See if we can convert a comdat to a comdef, | |
| 953 // which saves on exe file space. | |
| 95 | 954 if (0 && // causes multiple def problems with COMMON in one file and COMDAT in library |
| 955 sinit.Sclass == SCcomdat && | |
| 0 | 956 sinit.Sdt && |
| 957 sinit.Sdt.dt == DT.DT_azeros && | |
| 958 sinit.Sdt.DTnext == null && | |
| 959 !global.params.multiobj) | |
| 960 { | |
| 961 sinit.Sclass = SC.SCglobal; | |
| 962 sinit.Sdt.dt = DT.DT_common; | |
| 963 } | |
| 964 } | |
| 965 | |
| 966 version (ELFOBJ) { | |
| 967 sinit.Sseg = Segment.CDATA; | |
| 968 } | |
| 969 version (MACHOBJ) { | |
| 970 sinit.Sseg = Segment.DATA; | |
| 971 } | |
| 972 outdata(sinit); | |
| 973 } | |
| 974 | |
| 975 // Put out the members | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
976 foreach(Dsymbol member; members) |
| 0 | 977 member.toObjFile(0); |
| 978 } | |
| 979 } | |
| 980 | |
| 981 void toDt(dt_t** pdt) | |
| 982 { | |
| 983 uint offset; | |
| 984 dt_t* dt; | |
| 985 | |
| 986 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 987 offset = 0; | |
| 988 | |
| 989 // Note equivalence of this loop to class's | |
| 79 | 990 for (uint i = 0; i < fields.dim; i++) |
| 0 | 991 { |
| 79 | 992 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 993 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 994 dt = null; | |
| 995 int sz; | |
| 996 | |
| 997 if (v.storage_class & STC.STCref) | |
| 998 { | |
| 999 sz = PTRSIZE; | |
| 1000 if (v.offset >= offset) | |
| 1001 dtnzeros(&dt, sz); | |
| 1002 } | |
| 1003 else | |
| 1004 { | |
| 1005 sz = cast(uint)v.type.size(); | |
| 1006 Initializer init = v.init; | |
| 1007 if (init) | |
| 1008 { | |
| 1009 //printf("\t\thas initializer %s\n", init.toChars()); | |
| 1010 ExpInitializer ei = init.isExpInitializer(); | |
| 1011 Type tb = v.type.toBasetype(); | |
| 1012 if (ei && tb.ty == TY.Tsarray) | |
| 1013 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 1014 else | |
| 1015 dt = init.toDt(); | |
| 1016 } | |
| 1017 else if (v.offset >= offset) | |
| 1018 v.type.toDt(&dt); | |
| 1019 } | |
| 1020 if (dt) | |
| 1021 { | |
| 1022 if (v.offset < offset) | |
| 1023 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 1024 else | |
| 1025 { | |
| 1026 if (offset < v.offset) | |
| 1027 dtnzeros(pdt, v.offset - offset); | |
| 1028 dtcat(pdt, dt); | |
| 1029 offset = v.offset + sz; | |
| 1030 } | |
| 1031 } | |
| 1032 } | |
| 1033 | |
| 1034 if (offset < structsize) | |
| 1035 dtnzeros(pdt, structsize - offset); | |
| 1036 | |
| 1037 dt_optimize(*pdt); | |
| 1038 } | |
| 1039 | |
| 1040 void toDebug() // to symbolic debug info | |
| 1041 { | |
| 1042 assert(false); | |
| 1043 } | |
| 1044 | |
| 72 | 1045 override StructDeclaration isStructDeclaration() { return this; } |
| 1046 } |