Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 130:60bb0fe4563e
dmdfe 2.037 first main iteration
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Thu, 09 Sep 2010 22:51:44 +0100 |
| parents | 010eb8f0e18d |
| children | 206db751bd4c |
| 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; | |
| 56 | |
| 57 import dmd.backend.dt_t; | |
| 58 import dmd.backend.Util; | |
| 59 import dmd.backend.SC; | |
| 60 import dmd.backend.DT; | |
| 61 import dmd.backend.FL; | |
| 62 import dmd.backend.glue; | |
| 63 | |
| 129 | 64 import std.stdio; |
| 65 | |
| 0 | 66 class StructDeclaration : AggregateDeclaration |
| 67 { | |
| 68 bool zeroInit; // true if initialize with 0 fill | |
| 69 | |
| 70 version (DMDV2) { | |
| 71 int hasIdentityAssign; // !=0 if has identity opAssign | |
| 72 FuncDeclaration cpctor; // generated copy-constructor, if any | |
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73 FuncDeclaration eq; // bool opEquals(ref const T), if any |
| 0 | 74 |
| 75 FuncDeclarations postblits; // Array of postblit functions | |
| 76 FuncDeclaration postblit; // aggregate postblit | |
| 77 } | |
| 78 | |
| 79 this(Loc loc, Identifier id) | |
| 80 { | |
| 81 super(loc, id); | |
| 82 | |
| 83 // For forward references | |
| 84 type = new TypeStruct(this); | |
| 85 | |
| 86 postblits = new FuncDeclarations(); /// | |
| 87 } | |
| 88 | |
| 72 | 89 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 90 { |
| 49 | 91 StructDeclaration sd; |
| 92 | |
| 93 if (s) | |
| 94 sd = cast(StructDeclaration)s; | |
| 95 else | |
| 96 sd = new StructDeclaration(loc, ident); | |
| 97 ScopeDsymbol.syntaxCopy(sd); | |
| 98 return sd; | |
| 0 | 99 } |
| 100 | |
| 72 | 101 override void semantic(Scope sc) |
| 0 | 102 { |
| 103 Scope sc2; | |
| 104 | |
| 105 //printf("+StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 106 | |
| 107 //static int count; if (++count == 20) *(char*)0=0; | |
| 108 | |
| 109 assert(type); | |
| 110 if (!members) // if forward reference | |
| 111 return; | |
| 112 | |
| 113 if (symtab) | |
| 114 { if (!scope_) | |
| 115 return; // semantic() already completed | |
| 116 } | |
| 117 else | |
| 118 symtab = new DsymbolTable(); | |
| 119 | |
| 120 Scope scx = null; | |
| 121 if (scope_) | |
| 122 { sc = scope_; | |
| 123 scx = scope_; // save so we don't make redundant copies | |
| 124 scope_ = null; | |
| 125 } | |
| 126 | |
| 127 parent = sc.parent; | |
| 128 type = type.semantic(loc, sc); | |
| 129 version (STRUCTTHISREF) { | |
| 130 handle = type; | |
| 131 } else { | |
| 132 handle = type.pointerTo(); | |
| 133 } | |
| 134 structalign = sc.structalign; | |
| 135 protection = sc.protection; | |
| 136 storage_class |= sc.stc; | |
| 137 if (sc.stc & STC.STCdeprecated) | |
| 138 isdeprecated = 1; | |
| 139 assert(!isAnonymous()); | |
| 140 if (sc.stc & STC.STCabstract) | |
| 141 error("structs, unions cannot be abstract"); | |
| 142 version (DMDV2) { | |
| 143 if (storage_class & STC.STCimmutable) | |
| 144 type = type.invariantOf(); | |
| 145 else if (storage_class & STC.STCconst) | |
| 146 type = type.constOf(); | |
| 147 else if (storage_class & STC.STCshared) | |
| 148 type = type.sharedOf(); | |
| 149 } | |
| 150 | |
| 151 if (sizeok == 0) // if not already done the addMember step | |
| 152 { | |
| 153 int hasfunctions = 0; | |
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154 foreach(Dsymbol s; members) |
| 0 | 155 { |
| 156 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 157 s.addMember(sc, this, true); |
| 0 | 158 if (s.isFuncDeclaration()) |
| 159 hasfunctions = 1; | |
| 160 } | |
| 161 | |
| 162 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 163 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 164 { Dsymbol s = toParent2(); | |
| 165 if (s) | |
| 166 { | |
| 167 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 168 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 169 | |
| 170 TemplateInstance ti; | |
| 171 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 172 { isnested = true; | |
| 173 Type t; | |
| 174 if (ad) | |
| 175 t = ad.handle; | |
| 176 else if (fd) | |
| 177 { | |
| 178 AggregateDeclaration add = fd.isMember2(); | |
| 179 if (add) | |
| 180 t = add.handle; | |
| 181 else | |
| 182 t = Type.tvoidptr; | |
| 183 } | |
| 184 else | |
| 185 assert(0); | |
| 186 if (t.ty == TY.Tstruct) | |
| 187 t = Type.tvoidptr; // t should not be a ref type | |
| 188 assert(!vthis); | |
| 189 vthis = new ThisDeclaration(loc, t); | |
| 190 //vthis.storage_class |= STC.STCref; | |
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191 members.push(vthis); |
| 0 | 192 } |
| 193 } | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 sizeok = 0; | |
| 198 sc2 = sc.push(this); | |
| 199 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 200 sc2.parent = this; | |
| 201 if (isUnionDeclaration()) | |
| 202 sc2.inunion = 1; | |
| 203 sc2.protection = PROT.PROTpublic; | |
| 204 sc2.explicitProtection = 0; | |
| 205 | |
| 206 int members_dim = members.dim; | |
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207 foreach(Dsymbol s; members) |
| 0 | 208 { |
| 129 | 209 s.semantic(sc2); |
| 210 if (isUnionDeclaration()) | |
| 211 sc2.offset = 0; | |
| 0 | 212 static if (false) { |
| 129 | 213 if (sizeok == 2) |
| 214 { //printf("forward reference\n"); | |
| 215 break; | |
| 216 } | |
| 0 | 217 } |
| 129 | 218 if (auto d = s.isDeclaration()) |
| 219 { | |
| 220 if (auto t = d.type) { | |
| 221 if (t.toBasetype().ty == TY.Tstruct) { | |
| 222 auto ad = t.toDsymbol(sc).isThis(); | |
| 223 /* | |
| 224 StructDeclaration sd = cast(StructDeclaration)foo; | |
| 225 if (foo && !sd) { | |
| 226 writeln(t.classin); | |
| 227 writeln(foo.classinfo.name); | |
| 228 assert(false); | |
| 229 } | |
| 230 */ | |
| 231 if (ad && ad.isnested) | |
| 232 error("inner struct %s cannot be a field", ad.toChars()); | |
| 233 } | |
| 234 } | |
| 235 } | |
| 0 | 236 } |
| 237 | |
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238 version(DMDV1) { |
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239 /* This doesn't work for DMDV2 because (ref S) and (S) parameter |
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240 * lists will overload the same. |
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241 */ |
| 0 | 242 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
| 243 * a parameter that is a pointer to the struct. But if there | |
| 244 * isn't one, but is an opEquals or opCmp with a value, write | |
| 245 * another that is a shell around the value: | |
| 246 * int opCmp(struct *p) { return opCmp(*p); } | |
| 247 */ | |
| 248 | |
| 249 TypeFunction tfeqptr; | |
| 250 { | |
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251 auto arguments = new Parameters; |
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252 auto arg = new Parameter(STC.STCin, handle, Id.p, null); |
| 0 | 253 |
| 129 | 254 arguments.push(arg); |
| 255 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 256 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 0 | 257 } |
| 258 | |
| 259 TypeFunction tfeq; | |
| 260 { | |
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261 auto arguments = new Parameters; |
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262 auto arg = new Parameter(STC.STCin, type, null, null); |
| 0 | 263 |
| 129 | 264 arguments.push(arg); |
| 265 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 266 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 0 | 267 } |
| 268 | |
| 269 Identifier id = Id.eq; | |
| 270 for (int j = 0; j < 2; j++) | |
| 271 { | |
| 272 Dsymbol s = search_function(this, id); | |
| 273 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 274 if (fdx) | |
| 275 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 276 if (!fd) | |
| 277 { fd = fdx.overloadExactMatch(tfeq); | |
| 278 if (fd) | |
| 279 { // Create the thunk, fdptr | |
| 280 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 281 Expression e = new IdentifierExp(loc, Id.p); | |
| 282 e = new PtrExp(loc, e); | |
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283 auto args = new Expressions(); |
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284 args.push(e); |
| 0 | 285 e = new IdentifierExp(loc, id); |
| 286 e = new CallExp(loc, e, args); | |
| 287 fdptr.fbody = new ReturnStatement(loc, e); | |
| 288 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 289 assert(ss); | |
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290 ss.members.push(fdptr); |
| 13 | 291 fdptr.addMember(sc, ss, true); |
| 0 | 292 fdptr.semantic(sc2); |
| 293 } | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 id = Id.cmp; | |
| 298 } | |
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299 } |
| 0 | 300 version (DMDV2) { |
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301 /* Try to find the opEquals function. Build it if necessary. |
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302 */ |
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303 TypeFunction *tfeqptr; |
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304 { // bool opEquals(const T*) const; |
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305 auto parameters = new Parameters; |
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306 version(STRUCTTHISREF) { |
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307 // bool opEquals(ref const T) const; |
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308 auto param = new Parameter(STC.STCref, type.constOf(), null, null); |
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309 } else { |
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310 // bool opEquals(const T*) const; |
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311 auto param = new Parameter(STC.STCin, type.pointerTo(), null, null); |
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312 } |
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313 |
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314 parameters.push(param); |
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315 tfeqptr = new TypeFunction(parameters, Type.tbool, 0, LINK.LINKd); |
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316 tfeqptr.mod = MOD.MODconst; |
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317 tfeqptr = cast(TypeFunction)(tfeqptr.semantic(0, sc2)); |
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318 |
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319 Dsymbol s = search_function(this, Id.eq); |
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320 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; |
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321 if (fdx) |
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322 { |
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323 eq = fdx.overloadExactMatch(tfeqptr); |
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324 if (!eq) |
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325 fdx.error("type signature should be %s not %s", tfeqptr.toChars(), fdx.type.toChars()); |
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326 } |
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327 |
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328 if (!eq) |
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329 eq = buildOpEquals(sc2); |
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330 } |
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331 |
| 0 | 332 dtor = buildDtor(sc2); |
| 333 postblit = buildPostBlit(sc2); | |
| 334 cpctor = buildCpCtor(sc2); | |
| 335 buildOpAssign(sc2); | |
| 336 } | |
| 337 | |
| 338 sc2.pop(); | |
| 339 | |
| 340 if (sizeok == 2) | |
| 341 { // semantic() failed because of forward references. | |
| 342 // Unwind what we did, and defer it for later | |
| 343 fields.setDim(0); | |
| 344 structsize = 0; | |
| 345 alignsize = 0; | |
| 346 structalign = 0; | |
| 347 | |
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348 scope_ = scx ? scx : sc.clone(); |
| 0 | 349 scope_.setNoFree(); |
| 350 scope_.module_.addDeferredSemantic(this); | |
| 351 //printf("\tdeferring %s\n", toChars()); | |
| 352 return; | |
| 353 } | |
| 354 | |
| 355 // 0 sized struct's are set to 1 byte | |
| 356 if (structsize == 0) | |
| 357 { | |
| 358 structsize = 1; | |
| 359 alignsize = 1; | |
| 360 } | |
| 361 | |
| 362 // Round struct size up to next alignsize boundary. | |
| 363 // This will ensure that arrays of structs will get their internals | |
| 364 // aligned properly. | |
| 365 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 366 | |
| 367 sizeok = 1; | |
| 368 Module.dprogress++; | |
| 369 | |
| 370 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 371 | |
| 372 // Determine if struct is all zeros or not | |
| 373 zeroInit = true; | |
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374 foreach (VarDeclaration vd; fields) |
| 0 | 375 { |
| 79 | 376 if (vd && !vd.isDataseg()) |
| 0 | 377 { |
| 79 | 378 if (vd.init) |
| 379 { | |
| 380 // Should examine init to see if it is really all 0's | |
| 0 | 381 zeroInit = false; |
| 382 break; | |
| 79 | 383 } |
| 384 else | |
| 385 { | |
| 386 if (!vd.type.isZeroInit(loc)) | |
| 387 { | |
| 388 zeroInit = false; | |
| 389 break; | |
| 390 } | |
| 391 } | |
| 0 | 392 } |
| 393 } | |
| 394 | |
| 395 /* Look for special member functions. | |
| 396 */ | |
| 397 version (DMDV2) { | |
| 398 ctor = search(Loc(0), Id.ctor, 0); | |
| 399 } | |
| 400 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 401 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 402 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 403 | |
| 404 if (sc.func) | |
| 405 { | |
| 406 semantic2(sc); | |
| 407 semantic3(sc); | |
| 408 } | |
| 409 } | |
| 410 | |
| 72 | 411 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 412 { |
| 413 assert(false); | |
| 414 } | |
| 415 | |
| 72 | 416 override string mangle() |
| 0 | 417 { |
| 418 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 419 return Dsymbol.mangle(); | |
| 420 } | |
| 421 | |
| 72 | 422 override string kind() |
| 0 | 423 { |
| 424 assert(false); | |
| 425 } | |
|
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426 |
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427 version(DMDV1) |
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428 { |
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429 Expression cloneMembers() |
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430 { |
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431 assert(false); |
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432 } |
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433 } |
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434 |
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435 version(DMDV2) |
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436 { |
| 0 | 437 /******************************************* |
| 438 * We need an opAssign for the struct if | |
| 439 * it has a destructor or a postblit. | |
| 440 * We need to generate one if a user-specified one does not exist. | |
| 441 */ | |
| 442 bool needOpAssign() | |
| 443 { | |
| 444 static if (false) { | |
| 445 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 446 } | |
| 447 if (hasIdentityAssign) | |
| 448 goto Ldontneed; | |
| 449 | |
| 450 if (dtor || postblit) | |
| 451 goto Lneed; | |
| 452 | |
| 453 /* If any of the fields need an opAssign, then we | |
| 454 * need it too. | |
| 455 */ | |
|
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456 foreach (VarDeclaration v; fields) |
| 0 | 457 { |
| 458 assert(v && v.storage_class & STC.STCfield); | |
| 459 if (v.storage_class & STC.STCref) | |
| 460 continue; | |
| 461 Type tv = v.type.toBasetype(); | |
| 462 while (tv.ty == TY.Tsarray) | |
| 463 { TypeSArray ta = cast(TypeSArray)tv; | |
| 464 tv = tv.nextOf().toBasetype(); | |
| 465 } | |
| 466 if (tv.ty == TY.Tstruct) | |
| 467 { TypeStruct ts = cast(TypeStruct)tv; | |
| 468 StructDeclaration sd = ts.sym; | |
| 469 if (sd.needOpAssign()) | |
| 470 goto Lneed; | |
| 471 } | |
| 472 } | |
| 473 Ldontneed: | |
| 474 static if (false) { | |
| 475 printf("\tdontneed\n"); | |
| 476 } | |
| 477 return false; | |
| 478 | |
| 479 Lneed: | |
| 480 static if (false) { | |
| 481 printf("\tneed\n"); | |
| 482 } | |
| 483 return true; | |
| 484 } | |
| 485 | |
|
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486 /******************************************* |
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487 * We need an opEquals for the struct if |
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488 * any fields has an opEquals. |
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489 * Generate one if a user-specified one does not exist. |
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490 */ |
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491 bool needOpEquals() |
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492 { |
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493 enum X = 0; |
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494 static if (X) printf("StructDeclaration::needOpEquals() %s\n", toChars()); |
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495 |
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496 /* If any of the fields has an opEquals, then we |
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497 * need it too. |
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498 */ |
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499 foreach (s; fields) |
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500 { |
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501 VarDeclaration v = s.isVarDeclaration(); |
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502 assert(v && v.storage_class & STC.STCfield); |
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503 if (v.storage_class & STC.STCref) |
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504 continue; |
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505 Type tv = v.type.toBasetype(); |
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506 while (tv.ty == Tsarray) |
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507 { auto ta = cast(TypeSArray)tv; |
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508 tv = tv.nextOf().toBasetype(); |
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509 } |
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510 if (tv.ty == Tstruct) |
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511 { auto ts = cast(TypeStruct)tv; |
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512 StructDeclaration sd = ts.sym; |
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513 if (sd.eq) |
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514 goto Lneed; |
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515 } |
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516 } |
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517 Ldontneed: |
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518 static if (X) printf("\tdontneed\n"); |
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519 return false; |
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520 |
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521 Lneed: |
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522 static if (X) printf("\tneed\n"); |
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523 return true; |
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524 } |
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525 |
| 0 | 526 /****************************************** |
| 527 * Build opAssign for struct. | |
| 528 * S* opAssign(S s) { ... } | |
| 529 */ | |
| 530 FuncDeclaration buildOpAssign(Scope sc) | |
| 531 { | |
| 532 if (!needOpAssign()) | |
| 533 return null; | |
| 534 | |
| 535 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 536 | |
| 537 FuncDeclaration fop = null; | |
| 538 | |
|
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539 auto param = new Parameter(STC.STCnodtor, type, Id.p, null); |
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540 auto fparams = new Parameters; |
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541 fparams.push(param); |
| 0 | 542 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); |
| 543 version (STRUCTTHISREF) { | |
| 544 (cast(TypeFunction)ftype).isref = 1; | |
| 545 } | |
| 546 | |
| 547 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 548 | |
| 549 Expression e = null; | |
| 550 if (postblit) | |
| 551 { /* Swap: | |
| 552 * tmp = *this; *this = s; tmp.dtor(); | |
| 553 */ | |
| 554 //printf("\tswap copy\n"); | |
| 555 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 556 VarDeclaration tmp; | |
| 557 AssignExp ec = null; | |
| 558 if (dtor) | |
| 559 { | |
| 560 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 561 tmp.noauto = true; | |
| 562 e = new DeclarationExp(Loc(0), tmp); | |
| 563 | |
| 564 Expression e2; | |
| 565 version (STRUCTTHISREF) { | |
| 566 e2 = new ThisExp(Loc(0)); | |
| 567 } else { | |
| 568 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 569 } | |
| 570 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 571 ec.op = TOK.TOKblit; | |
| 572 e = Expression.combine(e, ec); | |
| 573 } | |
| 574 Expression e2; | |
| 575 version (STRUCTTHISREF) { | |
| 576 e2 = new ThisExp(Loc(0)); | |
| 577 } else { | |
| 578 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 579 } | |
| 580 | |
| 581 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); | |
| 582 ec.op = TOK.TOKblit; | |
| 583 e = Expression.combine(e, ec); | |
| 584 if (dtor) | |
| 585 { | |
| 586 /* Instead of running the destructor on s, run it | |
| 587 * on tmp. This avoids needing to copy tmp back in to s. | |
| 588 */ | |
| 589 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 590 ecc = new CallExp(Loc(0), ecc); | |
| 591 e = Expression.combine(e, ecc); | |
| 592 } | |
| 593 } | |
| 594 else | |
| 595 { /* Do memberwise copy | |
| 596 */ | |
| 597 //printf("\tmemberwise copy\n"); | |
|
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598 foreach (VarDeclaration v; fields) |
| 0 | 599 { |
| 600 assert(v && v.storage_class & STC.STCfield); | |
| 601 // this.v = s.v; | |
| 602 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)); | |
| 603 ec.op = TOK.TOKblit; | |
| 604 e = Expression.combine(e, ec); | |
| 605 } | |
| 606 } | |
| 607 Statement s1 = new ExpStatement(Loc(0), e); | |
| 608 | |
| 609 /* Add: | |
| 610 * return this; | |
| 611 */ | |
| 612 e = new ThisExp(Loc(0)); | |
| 613 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 614 | |
| 615 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 616 | |
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617 members.push(fop); |
| 13 | 618 fop.addMember(sc, this, true); |
| 0 | 619 |
| 620 sc = sc.push(); | |
| 621 sc.stc = STC.STCundefined; | |
| 622 sc.linkage = LINK.LINKd; | |
| 623 | |
| 624 fop.semantic(sc); | |
| 625 | |
| 626 sc.pop(); | |
| 627 | |
| 628 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 629 | |
| 630 return fop; | |
| 631 } | |
| 632 | |
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633 /****************************************** |
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634 * Build opEquals for struct. |
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635 * const bool opEquals(const ref S s) { ... } |
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636 */ |
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637 FuncDeclaration buildOpEquals(Scope sc) |
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638 { |
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639 if (!needOpEquals()) |
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640 return null; |
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641 //printf("StructDeclaration::buildOpEquals() %s\n", toChars()); |
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642 Loc loc = this.loc; |
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643 |
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644 auto parameters = new Parameters; |
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645 version (STRUCTTHISREF) { |
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646 // bool opEquals(ref const T) const; |
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647 auto param = new Parameter(STC.STCref, type.constOf(), Id.p, NULL); |
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648 } else { |
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649 // bool opEquals(const T*) const; |
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650 auto param = new Parameter(STC.STCin, type.pointerTo(), Id.p, NULL); |
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651 } |
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652 |
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653 parameters.push(param); |
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654 auto ftype = new TypeFunction(parameters, Type.tbool, 0, LINKd); |
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655 ftype.mod = MOD.MODconst; |
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656 ftype = cast(TypeFunction)ftype.semantic(loc, sc); |
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657 |
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658 auto fop = new FuncDeclaration(loc, 0, Id.eq, STD.STCundefined, ftype); |
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659 |
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660 Expression *e = NULL; |
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661 /* Do memberwise compare |
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662 */ |
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663 //printf("\tmemberwise compare\n"); |
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664 foreach (s; fields) |
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665 { |
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666 VarDeclaration v = s.isVarDeclaration(); |
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667 assert(v && v.storage_class & STD.STCfield); |
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668 if (v.storage_class & STC.STCref) |
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669 assert(0); // what should we do with this? |
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670 // this.v == s.v; |
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671 auto ec = new EqualExp(TOKequal, loc, |
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672 new DotVarExp(loc, new ThisExp(loc), v, 0), |
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673 new DotVarExp(loc, new IdentifierExp(loc, Id.p), v, 0)); |
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674 if (e) |
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675 e = new AndAndExp(loc, e, ec); |
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676 else |
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677 e = ec; |
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678 } |
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679 if (!e) |
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680 e = new IntegerExp(loc, 1, Type.tbool); |
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681 fop.fbody = new ReturnStatement(loc, e); |
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682 |
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683 members.push(fop); |
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684 fop.addMember(sc, this, 1); |
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685 |
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686 sc = sc.push(); |
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687 sc.stc = 0; |
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688 sc.linkage = LINK.LINKd; |
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689 |
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690 fop.semantic(sc); |
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691 |
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692 sc.pop(); |
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693 |
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694 //printf("-StructDeclaration::buildOpEquals() %s\n", toChars()); |
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695 |
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696 return fop; |
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697 } |
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698 |
| 0 | 699 /***************************************** |
| 700 * Create inclusive postblit for struct by aggregating | |
| 701 * all the postblits in postblits[] with the postblits for | |
| 702 * all the members. | |
| 703 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 704 * and the ordering changes (runs forward instead of backwards). | |
| 705 */ | |
| 706 | |
| 707 version (DMDV2) { | |
| 708 FuncDeclaration buildPostBlit(Scope sc) | |
| 709 { | |
| 710 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 711 Expression e = null; | |
| 712 | |
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713 foreach (VarDeclaration v; fields) |
| 0 | 714 { |
| 79 | 715 assert(v && v.storage_class & STC.STCfield); |
| 716 if (v.storage_class & STC.STCref) | |
| 717 continue; | |
| 718 Type tv = v.type.toBasetype(); | |
| 719 size_t dim = 1; | |
| 720 while (tv.ty == TY.Tsarray) | |
| 721 { TypeSArray ta = cast(TypeSArray)tv; | |
| 722 dim *= (cast(TypeSArray)tv).dim.toInteger(); | |
| 723 tv = tv.nextOf().toBasetype(); | |
| 0 | 724 } |
| 79 | 725 if (tv.ty == TY.Tstruct) |
| 726 { TypeStruct ts = cast(TypeStruct)tv; | |
| 727 StructDeclaration sd = ts.sym; | |
| 728 if (sd.postblit) | |
| 729 { Expression ex; | |
| 730 | |
| 731 // this.v | |
| 732 ex = new ThisExp(Loc(0)); | |
| 733 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 734 | |
| 735 if (dim == 1) | |
| 736 { // this.v.postblit() | |
| 737 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 738 ex = new CallExp(Loc(0), ex); | |
| 739 } | |
| 740 else | |
| 741 { | |
| 742 // Typeinfo.postblit(cast(void*)&this.v); | |
| 743 Expression ea = new AddrExp(Loc(0), ex); | |
| 744 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 745 | |
| 746 Expression et = v.type.getTypeInfo(sc); | |
| 103 | 747 et = new DotIdExp(Loc(0), et, Id._postblit); |
| 79 | 748 |
| 749 ex = new CallExp(Loc(0), et, ea); | |
| 750 } | |
| 751 e = Expression.combine(e, ex); // combine in forward order | |
| 752 } | |
| 0 | 753 } |
| 754 } | |
| 755 | |
| 756 /* Build our own "postblit" which executes e | |
| 757 */ | |
| 758 if (e) | |
| 759 { //printf("Building __fieldPostBlit()\n"); | |
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760 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); |
| 0 | 761 dd.fbody = new ExpStatement(Loc(0), e); |
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762 postblits.shift(dd); |
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763 members.push(dd); |
| 0 | 764 dd.semantic(sc); |
| 765 } | |
| 766 | |
| 767 switch (postblits.dim) | |
| 768 { | |
| 769 case 0: | |
| 770 return null; | |
| 771 | |
| 772 case 1: | |
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773 return cast(FuncDeclaration)postblits[0]; |
| 0 | 774 |
| 775 default: | |
| 776 e = null; | |
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777 foreach(FuncDeclaration fd; postblits) |
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778 { |
| 0 | 779 Expression ex = new ThisExp(Loc(0)); |
| 780 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 781 ex = new CallExp(Loc(0), ex); | |
| 782 e = Expression.combine(e, ex); | |
| 783 } | |
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784 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 0 | 785 dd.fbody = new ExpStatement(Loc(0), e); |
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786 members.push(dd); |
| 0 | 787 dd.semantic(sc); |
| 788 return dd; | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 | |
| 793 /******************************************* | |
| 794 * Build copy constructor for struct. | |
| 795 * Copy constructors are compiler generated only, and are only | |
| 796 * callable from the compiler. They are not user accessible. | |
| 797 * A copy constructor is: | |
| 798 * void cpctpr(ref S s) | |
| 799 * { | |
| 800 * *this = s; | |
| 801 * this.postBlit(); | |
| 802 * } | |
| 803 * This is done so: | |
| 804 * - postBlit() never sees uninitialized data | |
| 805 * - memcpy can be much more efficient than memberwise copy | |
| 806 * - no fields are overlooked | |
| 807 */ | |
| 808 FuncDeclaration buildCpCtor(Scope sc) | |
| 809 { | |
| 810 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 811 FuncDeclaration fcp = null; | |
| 812 | |
| 813 /* Copy constructor is only necessary if there is a postblit function, | |
| 814 * otherwise the code generator will just do a bit copy. | |
| 815 */ | |
| 816 if (postblit) | |
| 817 { | |
| 129 | 818 //printf("generating cpctor\n"); |
| 0 | 819 |
|
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820 auto param = new Parameter(STC.STCref, type, Id.p, null); |
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821 auto fparams = new Parameters; |
| 129 | 822 fparams.push(param); |
| 823 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 0 | 824 |
| 129 | 825 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); |
| 0 | 826 |
| 129 | 827 // Build *this = p; |
| 828 Expression e = new ThisExp(Loc(0)); | |
| 0 | 829 version (STRUCTTHISREF) { |
| 830 } else { | |
| 129 | 831 e = new PtrExp(Loc(0), e); |
| 0 | 832 } |
| 129 | 833 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); |
| 834 ea.op = TOK.TOKblit; | |
| 835 Statement s = new ExpStatement(Loc(0), ea); | |
| 0 | 836 |
| 129 | 837 // Build postBlit(); |
| 838 e = new VarExp(Loc(0), postblit, 0); | |
| 839 e = new CallExp(Loc(0), e); | |
| 0 | 840 |
| 129 | 841 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); |
| 842 fcp.fbody = s; | |
| 0 | 843 |
| 129 | 844 members.push(fcp); |
| 0 | 845 |
| 129 | 846 sc = sc.push(); |
| 847 sc.stc = STC.STCundefined; | |
| 848 sc.linkage = LINK.LINKd; | |
| 0 | 849 |
| 129 | 850 fcp.semantic(sc); |
| 0 | 851 |
| 129 | 852 sc.pop(); |
| 0 | 853 } |
| 854 | |
| 855 return fcp; | |
| 856 } | |
|
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857 } |
| 72 | 858 override void toDocBuffer(OutBuffer buf) |
| 0 | 859 { |
| 860 assert(false); | |
| 861 } | |
| 862 | |
| 72 | 863 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 864 { |
| 865 assert(false); | |
| 866 } | |
| 867 | |
| 72 | 868 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 869 { |
| 870 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 871 | |
| 872 if (multiobj) | |
| 873 { | |
| 874 obj_append(this); | |
| 875 return; | |
| 876 } | |
| 877 | |
| 878 // Anonymous structs/unions only exist as part of others, | |
| 879 // do not output forward referenced structs's | |
| 880 if (!isAnonymous() && members) | |
| 881 { | |
| 882 if (global.params.symdebug) { | |
| 883 toDebug(); | |
| 884 } | |
| 885 | |
| 886 type.getTypeInfo(null); // generate TypeInfo | |
| 887 | |
| 888 if (true) | |
| 889 { | |
| 890 // Generate static initializer | |
| 891 toInitializer(); | |
| 892 | |
| 893 static if (false) { | |
| 894 sinit.Sclass = SC.SCcomdat; | |
| 895 } else { | |
| 896 if (inTemplateInstance()) | |
| 897 { | |
| 898 sinit.Sclass = SC.SCcomdat; | |
| 899 } | |
| 900 else | |
| 901 { | |
| 902 sinit.Sclass = SC.SCglobal; | |
| 903 } | |
| 904 } | |
| 905 sinit.Sfl = FL.FLdata; | |
| 906 | |
| 907 toDt(&sinit.Sdt); | |
| 908 | |
| 95 | 909 version (OMFOBJ) |
| 910 { | |
| 0 | 911 /* For OMF, common blocks aren't pulled in from the library. |
| 912 */ | |
| 913 /* ELF comdef's generate multiple | |
| 914 * definition errors for them from the gnu linker. | |
| 915 * Need to figure out how to generate proper comdef's for ELF. | |
| 916 */ | |
| 917 // See if we can convert a comdat to a comdef, | |
| 918 // which saves on exe file space. | |
| 95 | 919 if (0 && // causes multiple def problems with COMMON in one file and COMDAT in library |
| 920 sinit.Sclass == SCcomdat && | |
| 0 | 921 sinit.Sdt && |
| 922 sinit.Sdt.dt == DT.DT_azeros && | |
| 923 sinit.Sdt.DTnext == null && | |
| 924 !global.params.multiobj) | |
| 925 { | |
| 926 sinit.Sclass = SC.SCglobal; | |
| 927 sinit.Sdt.dt = DT.DT_common; | |
| 928 } | |
| 929 } | |
| 930 | |
| 931 version (ELFOBJ) { | |
| 932 sinit.Sseg = Segment.CDATA; | |
| 933 } | |
| 934 version (MACHOBJ) { | |
| 935 sinit.Sseg = Segment.DATA; | |
| 936 } | |
| 937 outdata(sinit); | |
| 938 } | |
| 939 | |
| 940 // Put out the members | |
|
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941 foreach(Dsymbol member; members) |
| 0 | 942 member.toObjFile(0); |
| 943 } | |
| 944 } | |
| 945 | |
| 946 void toDt(dt_t** pdt) | |
| 947 { | |
| 948 uint offset; | |
| 949 dt_t* dt; | |
| 950 | |
| 951 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 952 offset = 0; | |
| 953 | |
| 954 // Note equivalence of this loop to class's | |
| 79 | 955 for (uint i = 0; i < fields.dim; i++) |
| 0 | 956 { |
| 79 | 957 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 958 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 959 dt = null; | |
| 960 int sz; | |
| 961 | |
| 962 if (v.storage_class & STC.STCref) | |
| 963 { | |
| 964 sz = PTRSIZE; | |
| 965 if (v.offset >= offset) | |
| 966 dtnzeros(&dt, sz); | |
| 967 } | |
| 968 else | |
| 969 { | |
| 970 sz = cast(uint)v.type.size(); | |
| 971 Initializer init = v.init; | |
| 972 if (init) | |
| 973 { | |
| 974 //printf("\t\thas initializer %s\n", init.toChars()); | |
| 975 ExpInitializer ei = init.isExpInitializer(); | |
| 976 Type tb = v.type.toBasetype(); | |
| 977 if (ei && tb.ty == TY.Tsarray) | |
| 978 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 979 else | |
| 980 dt = init.toDt(); | |
| 981 } | |
| 982 else if (v.offset >= offset) | |
| 983 v.type.toDt(&dt); | |
| 984 } | |
| 985 if (dt) | |
| 986 { | |
| 987 if (v.offset < offset) | |
| 988 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 989 else | |
| 990 { | |
| 991 if (offset < v.offset) | |
| 992 dtnzeros(pdt, v.offset - offset); | |
| 993 dtcat(pdt, dt); | |
| 994 offset = v.offset + sz; | |
| 995 } | |
| 996 } | |
| 997 } | |
| 998 | |
| 999 if (offset < structsize) | |
| 1000 dtnzeros(pdt, structsize - offset); | |
| 1001 | |
| 1002 dt_optimize(*pdt); | |
| 1003 } | |
| 1004 | |
| 1005 void toDebug() // to symbolic debug info | |
| 1006 { | |
| 1007 assert(false); | |
| 1008 } | |
| 1009 | |
| 72 | 1010 override StructDeclaration isStructDeclaration() { return this; } |
| 1011 } |