Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 138:90821c10b6a7
2.039
| author | Trass3r |
|---|---|
| date | Tue, 14 Sep 2010 00:00:24 +0200 |
| parents | af1bebfd96a4 |
| children | bc45b1c53019 |
| 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 | |
| 138 | 109 //writef("+StructDeclaration.semantic(this=%p, '%s', sizeok = %d)\n", this, toChars(), sizeok); |
| 0 | 110 |
| 138 | 111 //static int count; if (++count == 20) halt(); |
| 0 | 112 |
| 113 assert(type); | |
| 114 if (!members) // if forward reference | |
| 115 return; | |
| 116 | |
| 138 | 117 if (sizeok == 1 || symtab) |
| 118 { | |
| 119 if (!scope_) | |
| 120 { | |
| 121 // writef("already completed\n"); | |
| 122 scope_ = null; | |
| 0 | 123 return; // semantic() already completed |
| 138 | 124 } |
| 0 | 125 } |
| 126 else | |
| 127 symtab = new DsymbolTable(); | |
| 128 | |
| 129 Scope scx = null; | |
| 130 if (scope_) | |
| 131 { sc = scope_; | |
| 132 scx = scope_; // save so we don't make redundant copies | |
| 133 scope_ = null; | |
| 134 } | |
| 135 | |
| 136 parent = sc.parent; | |
| 137 type = type.semantic(loc, sc); | |
| 138 version (STRUCTTHISREF) { | |
| 139 handle = type; | |
| 140 } else { | |
| 141 handle = type.pointerTo(); | |
| 142 } | |
| 143 structalign = sc.structalign; | |
| 144 protection = sc.protection; | |
| 145 storage_class |= sc.stc; | |
| 146 if (sc.stc & STC.STCdeprecated) | |
| 147 isdeprecated = 1; | |
| 148 assert(!isAnonymous()); | |
| 149 if (sc.stc & STC.STCabstract) | |
| 150 error("structs, unions cannot be abstract"); | |
| 151 version (DMDV2) { | |
| 152 if (storage_class & STC.STCimmutable) | |
| 153 type = type.invariantOf(); | |
| 154 else if (storage_class & STC.STCconst) | |
| 155 type = type.constOf(); | |
| 156 else if (storage_class & STC.STCshared) | |
| 157 type = type.sharedOf(); | |
| 158 } | |
| 159 | |
| 160 if (sizeok == 0) // if not already done the addMember step | |
| 161 { | |
| 162 int hasfunctions = 0; | |
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163 foreach(Dsymbol s; members) |
| 0 | 164 { |
| 165 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 166 s.addMember(sc, this, true); |
| 0 | 167 if (s.isFuncDeclaration()) |
| 168 hasfunctions = 1; | |
| 169 } | |
| 170 | |
| 171 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 172 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 173 { Dsymbol s = toParent2(); | |
| 174 if (s) | |
| 175 { | |
| 176 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 177 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 178 | |
| 179 TemplateInstance ti; | |
| 180 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 181 { isnested = true; | |
| 182 Type t; | |
| 183 if (ad) | |
| 184 t = ad.handle; | |
| 185 else if (fd) | |
| 186 { | |
| 187 AggregateDeclaration add = fd.isMember2(); | |
| 188 if (add) | |
| 189 t = add.handle; | |
| 190 else | |
| 191 t = Type.tvoidptr; | |
| 192 } | |
| 193 else | |
| 194 assert(0); | |
| 195 if (t.ty == TY.Tstruct) | |
| 196 t = Type.tvoidptr; // t should not be a ref type | |
| 197 assert(!vthis); | |
| 198 vthis = new ThisDeclaration(loc, t); | |
| 199 //vthis.storage_class |= STC.STCref; | |
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200 members.push(vthis); |
| 0 | 201 } |
| 202 } | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 sizeok = 0; | |
| 207 sc2 = sc.push(this); | |
| 208 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 209 sc2.parent = this; | |
| 210 if (isUnionDeclaration()) | |
| 211 sc2.inunion = 1; | |
| 212 sc2.protection = PROT.PROTpublic; | |
| 213 sc2.explicitProtection = 0; | |
| 214 | |
| 135 | 215 |
| 216 /* Set scope so if there are forward references, we still might be able to | |
| 217 * resolve individual members like enums. | |
| 218 */ | |
| 219 foreach (s; members) | |
| 220 { | |
| 221 /* There are problems doing this in the general case because | |
| 222 * Scope keeps track of things like 'offset' | |
| 223 */ | |
| 224 if (s.isEnumDeclaration() || (s.isAggregateDeclaration() && s.ident)) | |
| 225 { | |
| 226 //printf("setScope %s %s\n", s->kind(), s->toChars()); | |
| 227 s.setScope(sc2); | |
| 228 } | |
| 229 } | |
| 230 | |
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231 foreach(Dsymbol s; members) |
| 0 | 232 { |
| 129 | 233 s.semantic(sc2); |
| 234 if (isUnionDeclaration()) | |
| 235 sc2.offset = 0; | |
| 0 | 236 static if (false) { |
| 129 | 237 if (sizeok == 2) |
| 238 { //printf("forward reference\n"); | |
| 239 break; | |
| 240 } | |
| 0 | 241 } |
| 129 | 242 if (auto d = s.isDeclaration()) |
| 243 { | |
| 244 if (auto t = d.type) { | |
| 245 if (t.toBasetype().ty == TY.Tstruct) { | |
| 246 auto ad = t.toDsymbol(sc).isThis(); | |
| 247 /* | |
| 248 StructDeclaration sd = cast(StructDeclaration)foo; | |
| 249 if (foo && !sd) { | |
| 250 writeln(t.classin); | |
| 251 writeln(foo.classinfo.name); | |
| 252 assert(false); | |
| 253 } | |
| 254 */ | |
| 255 if (ad && ad.isnested) | |
| 256 error("inner struct %s cannot be a field", ad.toChars()); | |
| 257 } | |
| 258 } | |
| 259 } | |
| 0 | 260 } |
| 261 | |
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262 version(DMDV1) { |
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263 /* This doesn't work for DMDV2 because (ref S) and (S) parameter |
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264 * lists will overload the same. |
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265 */ |
| 0 | 266 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
| 267 * a parameter that is a pointer to the struct. But if there | |
| 268 * isn't one, but is an opEquals or opCmp with a value, write | |
| 269 * another that is a shell around the value: | |
| 270 * int opCmp(struct *p) { return opCmp(*p); } | |
| 271 */ | |
| 272 | |
| 273 TypeFunction tfeqptr; | |
| 274 { | |
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275 auto arguments = new Parameters; |
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276 auto arg = new Parameter(STC.STCin, handle, Id.p, null); |
| 0 | 277 |
| 129 | 278 arguments.push(arg); |
| 279 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 280 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 0 | 281 } |
| 282 | |
| 283 TypeFunction tfeq; | |
| 284 { | |
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285 auto arguments = new Parameters; |
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286 auto arg = new Parameter(STC.STCin, type, null, null); |
| 0 | 287 |
| 129 | 288 arguments.push(arg); |
| 289 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 290 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 0 | 291 } |
| 292 | |
| 293 Identifier id = Id.eq; | |
| 294 for (int j = 0; j < 2; j++) | |
| 295 { | |
| 296 Dsymbol s = search_function(this, id); | |
| 297 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 298 if (fdx) | |
| 299 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 300 if (!fd) | |
| 301 { fd = fdx.overloadExactMatch(tfeq); | |
| 302 if (fd) | |
| 303 { // Create the thunk, fdptr | |
| 304 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 305 Expression e = new IdentifierExp(loc, Id.p); | |
| 306 e = new PtrExp(loc, e); | |
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307 auto args = new Expressions(); |
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308 args.push(e); |
| 0 | 309 e = new IdentifierExp(loc, id); |
| 310 e = new CallExp(loc, e, args); | |
| 311 fdptr.fbody = new ReturnStatement(loc, e); | |
| 312 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 313 assert(ss); | |
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314 ss.members.push(fdptr); |
| 13 | 315 fdptr.addMember(sc, ss, true); |
| 0 | 316 fdptr.semantic(sc2); |
| 317 } | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 id = Id.cmp; | |
| 322 } | |
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323 } |
| 0 | 324 version (DMDV2) { |
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325 /* Try to find the opEquals function. Build it if necessary. |
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326 */ |
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327 TypeFunction tfeqptr; |
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328 { // bool opEquals(const T*) const; |
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329 auto parameters = new Parameters; |
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330 version(STRUCTTHISREF) { |
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331 // bool opEquals(ref const T) const; |
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332 auto param = new Parameter(STC.STCref, type.constOf(), null, null); |
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333 } else { |
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334 // bool opEquals(const T*) const; |
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335 auto param = new Parameter(STC.STCin, type.pointerTo(), null, null); |
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336 } |
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337 |
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338 parameters.push(param); |
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339 tfeqptr = new TypeFunction(parameters, Type.tbool, 0, LINK.LINKd); |
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340 tfeqptr.mod = MOD.MODconst; |
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341 tfeqptr = cast(TypeFunction)(tfeqptr.semantic(Loc(0), sc2)); |
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342 |
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343 Dsymbol s = search_function(this, Id.eq); |
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344 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; |
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345 if (fdx) |
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346 { |
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347 eq = fdx.overloadExactMatch(tfeqptr); |
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348 if (!eq) |
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349 fdx.error("type signature should be %s not %s", tfeqptr.toChars(), fdx.type.toChars()); |
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350 } |
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351 |
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352 if (!eq) |
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353 eq = buildOpEquals(sc2); |
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354 } |
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355 |
| 0 | 356 dtor = buildDtor(sc2); |
| 357 postblit = buildPostBlit(sc2); | |
| 358 cpctor = buildCpCtor(sc2); | |
| 359 buildOpAssign(sc2); | |
| 360 } | |
| 361 | |
| 362 sc2.pop(); | |
| 363 | |
| 364 if (sizeok == 2) | |
| 365 { // semantic() failed because of forward references. | |
| 366 // Unwind what we did, and defer it for later | |
| 367 fields.setDim(0); | |
| 368 structsize = 0; | |
| 369 alignsize = 0; | |
| 370 structalign = 0; | |
| 371 | |
|
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372 scope_ = scx ? scx : sc.clone(); |
| 0 | 373 scope_.setNoFree(); |
| 374 scope_.module_.addDeferredSemantic(this); | |
| 138 | 375 writef("\tdeferring %s\n", toChars()); |
| 0 | 376 return; |
| 377 } | |
| 378 | |
| 379 // 0 sized struct's are set to 1 byte | |
| 380 if (structsize == 0) | |
| 381 { | |
| 382 structsize = 1; | |
| 383 alignsize = 1; | |
| 384 } | |
| 385 | |
| 386 // Round struct size up to next alignsize boundary. | |
| 387 // This will ensure that arrays of structs will get their internals | |
| 388 // aligned properly. | |
| 389 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 390 | |
| 391 sizeok = 1; | |
| 392 Module.dprogress++; | |
| 393 | |
| 394 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 395 | |
| 396 // Determine if struct is all zeros or not | |
| 397 zeroInit = true; | |
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398 foreach (VarDeclaration vd; fields) |
| 0 | 399 { |
| 79 | 400 if (vd && !vd.isDataseg()) |
| 0 | 401 { |
| 79 | 402 if (vd.init) |
| 403 { | |
| 404 // Should examine init to see if it is really all 0's | |
| 0 | 405 zeroInit = false; |
| 406 break; | |
| 79 | 407 } |
| 408 else | |
| 409 { | |
| 410 if (!vd.type.isZeroInit(loc)) | |
| 411 { | |
| 412 zeroInit = false; | |
| 413 break; | |
| 414 } | |
| 415 } | |
| 0 | 416 } |
| 417 } | |
| 418 | |
| 419 /* Look for special member functions. | |
| 420 */ | |
| 421 version (DMDV2) { | |
| 422 ctor = search(Loc(0), Id.ctor, 0); | |
| 423 } | |
| 424 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 425 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 426 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 427 | |
| 428 if (sc.func) | |
| 429 { | |
| 430 semantic2(sc); | |
| 431 semantic3(sc); | |
| 432 } | |
| 433 } | |
| 434 | |
| 135 | 435 Dsymbol search(Loc loc, Identifier ident, int flags) |
| 436 { | |
| 437 //printf("%s.StructDeclaration::search('%s')\n", toChars(), ident->toChars()); | |
| 438 | |
| 439 if (scope_) | |
| 440 semantic(scope_); | |
| 441 | |
| 442 if (!members || !symtab) | |
| 443 { | |
| 444 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 445 return null; | |
| 446 } | |
| 447 | |
| 448 return ScopeDsymbol.search(loc, ident, flags); | |
| 449 } | |
| 450 | |
| 72 | 451 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 452 { |
| 453 assert(false); | |
| 454 } | |
| 455 | |
| 72 | 456 override string mangle() |
| 0 | 457 { |
| 458 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 459 return Dsymbol.mangle(); | |
| 460 } | |
| 461 | |
| 72 | 462 override string kind() |
| 0 | 463 { |
| 464 assert(false); | |
| 465 } | |
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466 |
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467 version(DMDV1) |
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468 { |
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469 Expression cloneMembers() |
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470 { |
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471 assert(false); |
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472 } |
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473 } |
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474 |
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475 version(DMDV2) |
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476 { |
| 0 | 477 /******************************************* |
| 478 * We need an opAssign for the struct if | |
| 479 * it has a destructor or a postblit. | |
| 480 * We need to generate one if a user-specified one does not exist. | |
| 481 */ | |
| 482 bool needOpAssign() | |
| 483 { | |
| 484 static if (false) { | |
| 485 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 486 } | |
| 487 if (hasIdentityAssign) | |
| 488 goto Ldontneed; | |
| 489 | |
| 490 if (dtor || postblit) | |
| 491 goto Lneed; | |
| 492 | |
| 493 /* If any of the fields need an opAssign, then we | |
| 494 * need it too. | |
| 495 */ | |
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496 foreach (VarDeclaration v; fields) |
| 0 | 497 { |
| 498 assert(v && v.storage_class & STC.STCfield); | |
| 499 if (v.storage_class & STC.STCref) | |
| 500 continue; | |
| 501 Type tv = v.type.toBasetype(); | |
| 502 while (tv.ty == TY.Tsarray) | |
| 503 { TypeSArray ta = cast(TypeSArray)tv; | |
| 504 tv = tv.nextOf().toBasetype(); | |
| 505 } | |
| 506 if (tv.ty == TY.Tstruct) | |
| 507 { TypeStruct ts = cast(TypeStruct)tv; | |
| 508 StructDeclaration sd = ts.sym; | |
| 509 if (sd.needOpAssign()) | |
| 510 goto Lneed; | |
| 511 } | |
| 512 } | |
| 513 Ldontneed: | |
| 514 static if (false) { | |
| 515 printf("\tdontneed\n"); | |
| 516 } | |
| 517 return false; | |
| 518 | |
| 519 Lneed: | |
| 520 static if (false) { | |
| 521 printf("\tneed\n"); | |
| 522 } | |
| 523 return true; | |
| 524 } | |
| 525 | |
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526 /******************************************* |
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527 * We need an opEquals for the struct if |
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528 * any fields has an opEquals. |
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529 * Generate one if a user-specified one does not exist. |
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530 */ |
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531 bool needOpEquals() |
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532 { |
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533 enum X = 0; |
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534 static if (X) printf("StructDeclaration::needOpEquals() %s\n", toChars()); |
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535 |
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536 /* If any of the fields has an opEquals, then we |
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537 * need it too. |
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538 */ |
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539 foreach (s; fields) |
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540 { |
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541 VarDeclaration v = s.isVarDeclaration(); |
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542 assert(v && v.storage_class & STC.STCfield); |
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543 if (v.storage_class & STC.STCref) |
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544 continue; |
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545 Type tv = v.type.toBasetype(); |
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546 while (tv.ty == Tsarray) |
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547 { auto ta = cast(TypeSArray)tv; |
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548 tv = tv.nextOf().toBasetype(); |
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549 } |
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550 if (tv.ty == Tstruct) |
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551 { auto ts = cast(TypeStruct)tv; |
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552 StructDeclaration sd = ts.sym; |
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553 if (sd.eq) |
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554 goto Lneed; |
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555 } |
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556 } |
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557 Ldontneed: |
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558 static if (X) printf("\tdontneed\n"); |
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559 return false; |
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560 |
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561 Lneed: |
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562 static if (X) printf("\tneed\n"); |
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563 return true; |
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564 } |
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565 |
| 0 | 566 /****************************************** |
| 567 * Build opAssign for struct. | |
| 568 * S* opAssign(S s) { ... } | |
| 569 */ | |
| 570 FuncDeclaration buildOpAssign(Scope sc) | |
| 571 { | |
| 572 if (!needOpAssign()) | |
| 573 return null; | |
| 574 | |
| 575 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 576 | |
| 577 FuncDeclaration fop = null; | |
| 578 | |
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579 auto param = new Parameter(STC.STCnodtor, type, Id.p, null); |
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580 auto fparams = new Parameters; |
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581 fparams.push(param); |
| 0 | 582 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); |
| 583 version (STRUCTTHISREF) { | |
| 584 (cast(TypeFunction)ftype).isref = 1; | |
| 585 } | |
| 586 | |
| 587 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 588 | |
| 589 Expression e = null; | |
| 590 if (postblit) | |
| 591 { /* Swap: | |
| 592 * tmp = *this; *this = s; tmp.dtor(); | |
| 593 */ | |
| 594 //printf("\tswap copy\n"); | |
| 595 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 596 VarDeclaration tmp; | |
| 597 AssignExp ec = null; | |
| 598 if (dtor) | |
| 599 { | |
| 600 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 601 tmp.noauto = true; | |
| 602 e = new DeclarationExp(Loc(0), tmp); | |
| 603 | |
| 604 Expression e2; | |
| 605 version (STRUCTTHISREF) { | |
| 606 e2 = new ThisExp(Loc(0)); | |
| 607 } else { | |
| 608 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 609 } | |
| 610 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 611 ec.op = TOK.TOKblit; | |
| 612 e = Expression.combine(e, ec); | |
| 613 } | |
| 614 Expression e2; | |
| 615 version (STRUCTTHISREF) { | |
| 616 e2 = new ThisExp(Loc(0)); | |
| 617 } else { | |
| 618 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 619 } | |
| 620 | |
| 621 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); | |
| 622 ec.op = TOK.TOKblit; | |
| 623 e = Expression.combine(e, ec); | |
| 624 if (dtor) | |
| 625 { | |
| 626 /* Instead of running the destructor on s, run it | |
| 627 * on tmp. This avoids needing to copy tmp back in to s. | |
| 628 */ | |
| 629 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 630 ecc = new CallExp(Loc(0), ecc); | |
| 631 e = Expression.combine(e, ecc); | |
| 632 } | |
| 633 } | |
| 634 else | |
| 635 { /* Do memberwise copy | |
| 636 */ | |
| 637 //printf("\tmemberwise copy\n"); | |
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638 foreach (VarDeclaration v; fields) |
| 0 | 639 { |
| 640 assert(v && v.storage_class & STC.STCfield); | |
| 641 // this.v = s.v; | |
| 642 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)); | |
| 643 ec.op = TOK.TOKblit; | |
| 644 e = Expression.combine(e, ec); | |
| 645 } | |
| 646 } | |
| 647 Statement s1 = new ExpStatement(Loc(0), e); | |
| 648 | |
| 649 /* Add: | |
| 650 * return this; | |
| 651 */ | |
| 652 e = new ThisExp(Loc(0)); | |
| 653 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 654 | |
| 655 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 656 | |
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657 members.push(fop); |
| 13 | 658 fop.addMember(sc, this, true); |
| 0 | 659 |
| 660 sc = sc.push(); | |
| 661 sc.stc = STC.STCundefined; | |
| 662 sc.linkage = LINK.LINKd; | |
| 663 | |
| 664 fop.semantic(sc); | |
| 665 | |
| 666 sc.pop(); | |
| 667 | |
| 668 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 669 | |
| 670 return fop; | |
| 671 } | |
| 672 | |
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673 /****************************************** |
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674 * Build opEquals for struct. |
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675 * const bool opEquals(const ref S s) { ... } |
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676 */ |
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677 FuncDeclaration buildOpEquals(Scope sc) |
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678 { |
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679 if (!needOpEquals()) |
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680 return null; |
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681 //printf("StructDeclaration::buildOpEquals() %s\n", toChars()); |
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682 Loc loc = this.loc; |
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683 |
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684 auto parameters = new Parameters; |
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685 version (STRUCTTHISREF) { |
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686 // bool opEquals(ref const T) const; |
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687 auto param = new Parameter(STC.STCref, type.constOf(), Id.p, null); |
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688 } else { |
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689 // bool opEquals(const T*) const; |
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690 auto param = new Parameter(STC.STCin, type.pointerTo(), Id.p, null); |
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691 } |
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692 |
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693 parameters.push(param); |
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694 auto ftype = new TypeFunction(parameters, Type.tbool, 0, LINKd); |
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695 ftype.mod = MOD.MODconst; |
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696 ftype = cast(TypeFunction)ftype.semantic(loc, sc); |
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697 |
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698 auto fop = new FuncDeclaration(loc, Loc(0), Id.eq, STC.STCundefined, ftype); |
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699 |
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700 Expression e = null; |
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701 /* Do memberwise compare |
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702 */ |
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703 //printf("\tmemberwise compare\n"); |
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704 foreach (s; fields) |
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705 { |
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706 VarDeclaration v = s.isVarDeclaration(); |
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707 assert(v && v.storage_class & STC.STCfield); |
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708 if (v.storage_class & STC.STCref) |
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709 assert(0); // what should we do with this? |
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710 // this.v == s.v; |
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711 auto ec = new EqualExp(TOKequal, loc, |
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712 new DotVarExp(loc, new ThisExp(loc), v, 0), |
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713 new DotVarExp(loc, new IdentifierExp(loc, Id.p), v, 0)); |
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714 if (e) |
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715 e = new AndAndExp(loc, e, ec); |
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716 else |
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717 e = ec; |
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718 } |
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719 if (!e) |
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720 e = new IntegerExp(loc, 1, Type.tbool); |
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721 fop.fbody = new ReturnStatement(loc, e); |
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722 |
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723 members.push(fop); |
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724 fop.addMember(sc, this, 1); |
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725 |
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726 sc = sc.push(); |
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727 sc.stc = 0; |
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728 sc.linkage = LINK.LINKd; |
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729 |
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730 fop.semantic(sc); |
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731 |
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732 sc.pop(); |
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733 |
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734 //printf("-StructDeclaration::buildOpEquals() %s\n", toChars()); |
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735 |
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736 return fop; |
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737 } |
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738 |
| 0 | 739 /***************************************** |
| 740 * Create inclusive postblit for struct by aggregating | |
| 741 * all the postblits in postblits[] with the postblits for | |
| 742 * all the members. | |
| 743 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 744 * and the ordering changes (runs forward instead of backwards). | |
| 745 */ | |
| 746 | |
| 747 version (DMDV2) { | |
| 748 FuncDeclaration buildPostBlit(Scope sc) | |
| 749 { | |
| 750 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 751 Expression e = null; | |
| 752 | |
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753 foreach (VarDeclaration v; fields) |
| 0 | 754 { |
| 79 | 755 assert(v && v.storage_class & STC.STCfield); |
| 756 if (v.storage_class & STC.STCref) | |
| 757 continue; | |
| 758 Type tv = v.type.toBasetype(); | |
| 759 size_t dim = 1; | |
| 760 while (tv.ty == TY.Tsarray) | |
| 761 { TypeSArray ta = cast(TypeSArray)tv; | |
| 762 dim *= (cast(TypeSArray)tv).dim.toInteger(); | |
| 763 tv = tv.nextOf().toBasetype(); | |
| 0 | 764 } |
| 79 | 765 if (tv.ty == TY.Tstruct) |
| 766 { TypeStruct ts = cast(TypeStruct)tv; | |
| 767 StructDeclaration sd = ts.sym; | |
| 768 if (sd.postblit) | |
| 769 { Expression ex; | |
| 770 | |
| 771 // this.v | |
| 772 ex = new ThisExp(Loc(0)); | |
| 773 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 774 | |
| 775 if (dim == 1) | |
| 776 { // this.v.postblit() | |
| 777 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 778 ex = new CallExp(Loc(0), ex); | |
| 779 } | |
| 780 else | |
| 781 { | |
| 782 // Typeinfo.postblit(cast(void*)&this.v); | |
| 783 Expression ea = new AddrExp(Loc(0), ex); | |
| 784 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 785 | |
| 786 Expression et = v.type.getTypeInfo(sc); | |
| 103 | 787 et = new DotIdExp(Loc(0), et, Id._postblit); |
| 79 | 788 |
| 789 ex = new CallExp(Loc(0), et, ea); | |
| 790 } | |
| 791 e = Expression.combine(e, ex); // combine in forward order | |
| 792 } | |
| 0 | 793 } |
| 794 } | |
| 795 | |
| 796 /* Build our own "postblit" which executes e | |
| 797 */ | |
| 798 if (e) | |
| 799 { //printf("Building __fieldPostBlit()\n"); | |
|
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800 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); |
| 0 | 801 dd.fbody = new ExpStatement(Loc(0), e); |
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802 postblits.shift(dd); |
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803 members.push(dd); |
| 0 | 804 dd.semantic(sc); |
| 805 } | |
| 806 | |
| 807 switch (postblits.dim) | |
| 808 { | |
| 809 case 0: | |
| 810 return null; | |
| 811 | |
| 812 case 1: | |
|
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813 return cast(FuncDeclaration)postblits[0]; |
| 0 | 814 |
| 815 default: | |
| 816 e = null; | |
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817 foreach(FuncDeclaration fd; postblits) |
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818 { |
| 0 | 819 Expression ex = new ThisExp(Loc(0)); |
| 820 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 821 ex = new CallExp(Loc(0), ex); | |
| 822 e = Expression.combine(e, ex); | |
| 823 } | |
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824 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 0 | 825 dd.fbody = new ExpStatement(Loc(0), e); |
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826 members.push(dd); |
| 0 | 827 dd.semantic(sc); |
| 828 return dd; | |
| 829 } | |
| 830 } | |
| 831 } | |
| 832 | |
| 833 /******************************************* | |
| 834 * Build copy constructor for struct. | |
| 835 * Copy constructors are compiler generated only, and are only | |
| 836 * callable from the compiler. They are not user accessible. | |
| 837 * A copy constructor is: | |
| 838 * void cpctpr(ref S s) | |
| 839 * { | |
| 840 * *this = s; | |
| 841 * this.postBlit(); | |
| 842 * } | |
| 843 * This is done so: | |
| 844 * - postBlit() never sees uninitialized data | |
| 845 * - memcpy can be much more efficient than memberwise copy | |
| 846 * - no fields are overlooked | |
| 847 */ | |
| 848 FuncDeclaration buildCpCtor(Scope sc) | |
| 849 { | |
| 850 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 851 FuncDeclaration fcp = null; | |
| 852 | |
| 853 /* Copy constructor is only necessary if there is a postblit function, | |
| 854 * otherwise the code generator will just do a bit copy. | |
| 855 */ | |
| 856 if (postblit) | |
| 857 { | |
| 129 | 858 //printf("generating cpctor\n"); |
| 0 | 859 |
|
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860 auto param = new Parameter(STC.STCref, type, Id.p, null); |
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861 auto fparams = new Parameters; |
| 129 | 862 fparams.push(param); |
| 863 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 0 | 864 |
| 129 | 865 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); |
| 0 | 866 |
| 129 | 867 // Build *this = p; |
| 868 Expression e = new ThisExp(Loc(0)); | |
| 0 | 869 version (STRUCTTHISREF) { |
| 870 } else { | |
| 129 | 871 e = new PtrExp(Loc(0), e); |
| 0 | 872 } |
| 129 | 873 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); |
| 874 ea.op = TOK.TOKblit; | |
| 875 Statement s = new ExpStatement(Loc(0), ea); | |
| 0 | 876 |
| 129 | 877 // Build postBlit(); |
| 878 e = new VarExp(Loc(0), postblit, 0); | |
| 879 e = new CallExp(Loc(0), e); | |
| 0 | 880 |
| 129 | 881 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); |
| 882 fcp.fbody = s; | |
| 0 | 883 |
| 129 | 884 members.push(fcp); |
| 0 | 885 |
| 129 | 886 sc = sc.push(); |
| 887 sc.stc = STC.STCundefined; | |
| 888 sc.linkage = LINK.LINKd; | |
| 0 | 889 |
| 129 | 890 fcp.semantic(sc); |
| 0 | 891 |
| 129 | 892 sc.pop(); |
| 0 | 893 } |
| 894 | |
| 895 return fcp; | |
| 896 } | |
|
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897 } |
| 72 | 898 override void toDocBuffer(OutBuffer buf) |
| 0 | 899 { |
| 900 assert(false); | |
| 901 } | |
| 902 | |
| 72 | 903 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 904 { |
| 905 assert(false); | |
| 906 } | |
| 907 | |
| 72 | 908 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 909 { |
| 910 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 911 | |
| 912 if (multiobj) | |
| 913 { | |
| 914 obj_append(this); | |
| 915 return; | |
| 916 } | |
| 917 | |
| 918 // Anonymous structs/unions only exist as part of others, | |
| 919 // do not output forward referenced structs's | |
| 920 if (!isAnonymous() && members) | |
| 921 { | |
| 922 if (global.params.symdebug) { | |
| 923 toDebug(); | |
| 924 } | |
| 925 | |
| 926 type.getTypeInfo(null); // generate TypeInfo | |
| 927 | |
| 928 if (true) | |
| 929 { | |
| 930 // Generate static initializer | |
| 931 toInitializer(); | |
| 932 | |
| 933 static if (false) { | |
| 934 sinit.Sclass = SC.SCcomdat; | |
| 935 } else { | |
| 936 if (inTemplateInstance()) | |
| 937 { | |
| 938 sinit.Sclass = SC.SCcomdat; | |
| 939 } | |
| 940 else | |
| 941 { | |
| 942 sinit.Sclass = SC.SCglobal; | |
| 943 } | |
| 944 } | |
| 945 sinit.Sfl = FL.FLdata; | |
| 946 | |
| 947 toDt(&sinit.Sdt); | |
| 948 | |
| 95 | 949 version (OMFOBJ) |
| 950 { | |
| 0 | 951 /* For OMF, common blocks aren't pulled in from the library. |
| 952 */ | |
| 953 /* ELF comdef's generate multiple | |
| 954 * definition errors for them from the gnu linker. | |
| 955 * Need to figure out how to generate proper comdef's for ELF. | |
| 956 */ | |
| 957 // See if we can convert a comdat to a comdef, | |
| 958 // which saves on exe file space. | |
| 95 | 959 if (0 && // causes multiple def problems with COMMON in one file and COMDAT in library |
| 960 sinit.Sclass == SCcomdat && | |
| 0 | 961 sinit.Sdt && |
| 962 sinit.Sdt.dt == DT.DT_azeros && | |
| 963 sinit.Sdt.DTnext == null && | |
| 964 !global.params.multiobj) | |
| 965 { | |
| 966 sinit.Sclass = SC.SCglobal; | |
| 967 sinit.Sdt.dt = DT.DT_common; | |
| 968 } | |
| 969 } | |
| 970 | |
| 971 version (ELFOBJ) { | |
| 972 sinit.Sseg = Segment.CDATA; | |
| 973 } | |
| 974 version (MACHOBJ) { | |
| 975 sinit.Sseg = Segment.DATA; | |
| 976 } | |
| 977 outdata(sinit); | |
| 978 } | |
| 979 | |
| 980 // Put out the members | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
981 foreach(Dsymbol member; members) |
| 0 | 982 member.toObjFile(0); |
| 983 } | |
| 984 } | |
| 985 | |
| 986 void toDt(dt_t** pdt) | |
| 987 { | |
| 988 uint offset; | |
| 989 dt_t* dt; | |
| 990 | |
| 991 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 992 offset = 0; | |
| 993 | |
| 994 // Note equivalence of this loop to class's | |
| 79 | 995 for (uint i = 0; i < fields.dim; i++) |
| 0 | 996 { |
| 79 | 997 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 998 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 999 dt = null; | |
| 1000 int sz; | |
| 1001 | |
| 1002 if (v.storage_class & STC.STCref) | |
| 1003 { | |
| 1004 sz = PTRSIZE; | |
| 1005 if (v.offset >= offset) | |
| 1006 dtnzeros(&dt, sz); | |
| 1007 } | |
| 1008 else | |
| 1009 { | |
| 1010 sz = cast(uint)v.type.size(); | |
| 1011 Initializer init = v.init; | |
| 1012 if (init) | |
| 1013 { | |
| 1014 //printf("\t\thas initializer %s\n", init.toChars()); | |
| 1015 ExpInitializer ei = init.isExpInitializer(); | |
| 1016 Type tb = v.type.toBasetype(); | |
| 1017 if (ei && tb.ty == TY.Tsarray) | |
| 1018 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 1019 else | |
| 1020 dt = init.toDt(); | |
| 1021 } | |
| 1022 else if (v.offset >= offset) | |
| 1023 v.type.toDt(&dt); | |
| 1024 } | |
| 1025 if (dt) | |
| 1026 { | |
| 1027 if (v.offset < offset) | |
| 1028 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 1029 else | |
| 1030 { | |
| 1031 if (offset < v.offset) | |
| 1032 dtnzeros(pdt, v.offset - offset); | |
| 1033 dtcat(pdt, dt); | |
| 1034 offset = v.offset + sz; | |
| 1035 } | |
| 1036 } | |
| 1037 } | |
| 1038 | |
| 1039 if (offset < structsize) | |
| 1040 dtnzeros(pdt, structsize - offset); | |
| 1041 | |
| 1042 dt_optimize(*pdt); | |
| 1043 } | |
| 1044 | |
| 1045 void toDebug() // to symbolic debug info | |
| 1046 { | |
| 1047 assert(false); | |
| 1048 } | |
| 1049 | |
| 72 | 1050 override StructDeclaration isStructDeclaration() { return this; } |
| 1051 } |