Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 179:cd48cb899aee
Updated to dmd2.040
| author | korDen |
|---|---|
| date | Sun, 17 Oct 2010 20:56:07 +0400 |
| parents | e3afd1303184 |
| children | b0d41ff5e0df |
| 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 | |
| 176 | 73 |
| 0 | 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 { | |
| 178 | 85 register(); |
| 0 | 86 super(loc, id); |
| 87 | |
| 88 // For forward references | |
| 89 type = new TypeStruct(this); | |
| 176 | 90 |
| 0 | 91 postblits = new FuncDeclarations(); /// |
| 92 } | |
| 176 | 93 |
| 72 | 94 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 95 { |
| 49 | 96 StructDeclaration sd; |
| 97 | |
| 98 if (s) | |
| 99 sd = cast(StructDeclaration)s; | |
| 100 else | |
| 101 sd = new StructDeclaration(loc, ident); | |
| 102 ScopeDsymbol.syntaxCopy(sd); | |
| 103 return sd; | |
| 0 | 104 } |
| 176 | 105 |
| 72 | 106 override void semantic(Scope sc) |
| 0 | 107 { |
| 108 Scope sc2; | |
| 109 | |
| 138 | 110 //writef("+StructDeclaration.semantic(this=%p, '%s', sizeok = %d)\n", this, toChars(), sizeok); |
| 0 | 111 |
| 138 | 112 //static int count; if (++count == 20) halt(); |
| 0 | 113 |
| 114 assert(type); | |
| 115 if (!members) // if forward reference | |
| 116 return; | |
| 117 | |
| 138 | 118 if (sizeok == 1 || symtab) |
| 119 { | |
| 120 if (!scope_) | |
| 121 { | |
| 122 // writef("already completed\n"); | |
| 123 scope_ = null; | |
| 0 | 124 return; // semantic() already completed |
| 138 | 125 } |
| 0 | 126 } |
| 127 else | |
| 128 symtab = new DsymbolTable(); | |
| 129 | |
| 130 Scope scx = null; | |
| 131 if (scope_) | |
| 132 { sc = scope_; | |
| 133 scx = scope_; // save so we don't make redundant copies | |
| 134 scope_ = null; | |
| 135 } | |
| 179 | 136 |
| 137 uint dprogress_save = global.dprogress; | |
| 0 | 138 |
| 139 parent = sc.parent; | |
| 140 type = type.semantic(loc, sc); | |
| 141 version (STRUCTTHISREF) { | |
| 142 handle = type; | |
| 143 } else { | |
| 144 handle = type.pointerTo(); | |
| 145 } | |
| 146 structalign = sc.structalign; | |
| 147 protection = sc.protection; | |
| 148 storage_class |= sc.stc; | |
| 149 if (sc.stc & STC.STCdeprecated) | |
| 150 isdeprecated = 1; | |
| 151 assert(!isAnonymous()); | |
| 152 if (sc.stc & STC.STCabstract) | |
| 153 error("structs, unions cannot be abstract"); | |
| 154 version (DMDV2) { | |
| 155 if (storage_class & STC.STCimmutable) | |
| 156 type = type.invariantOf(); | |
| 157 else if (storage_class & STC.STCconst) | |
| 158 type = type.constOf(); | |
| 159 else if (storage_class & STC.STCshared) | |
| 160 type = type.sharedOf(); | |
| 161 } | |
| 162 | |
| 163 if (sizeok == 0) // if not already done the addMember step | |
| 164 { | |
| 165 int hasfunctions = 0; | |
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166 foreach(Dsymbol s; members) |
| 0 | 167 { |
| 168 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 169 s.addMember(sc, this, true); |
| 0 | 170 if (s.isFuncDeclaration()) |
| 171 hasfunctions = 1; | |
| 172 } | |
| 173 | |
| 174 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 175 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 176 { Dsymbol s = toParent2(); | |
| 177 if (s) | |
| 178 { | |
| 179 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 180 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 181 | |
| 182 TemplateInstance ti; | |
| 183 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 184 { isnested = true; | |
| 185 Type t; | |
| 186 if (ad) | |
| 187 t = ad.handle; | |
| 188 else if (fd) | |
| 176 | 189 { |
| 0 | 190 AggregateDeclaration add = fd.isMember2(); |
| 191 if (add) | |
| 192 t = add.handle; | |
| 193 else | |
| 176 | 194 t = global.tvoidptr; |
| 0 | 195 } |
| 196 else | |
| 197 assert(0); | |
| 198 if (t.ty == TY.Tstruct) | |
| 176 | 199 t = global.tvoidptr; // t should not be a ref type |
| 0 | 200 assert(!vthis); |
| 201 vthis = new ThisDeclaration(loc, t); | |
| 202 //vthis.storage_class |= STC.STCref; | |
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203 members.push(vthis); |
| 0 | 204 } |
| 205 } | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 sizeok = 0; | |
| 210 sc2 = sc.push(this); | |
| 211 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 212 sc2.parent = this; | |
| 213 if (isUnionDeclaration()) | |
| 214 sc2.inunion = 1; | |
| 215 sc2.protection = PROT.PROTpublic; | |
| 216 sc2.explicitProtection = 0; | |
| 217 | |
| 135 | 218 |
| 219 /* Set scope so if there are forward references, we still might be able to | |
| 220 * resolve individual members like enums. | |
| 221 */ | |
| 222 foreach (s; members) | |
| 223 { | |
| 224 /* There are problems doing this in the general case because | |
| 225 * Scope keeps track of things like 'offset' | |
| 226 */ | |
| 227 if (s.isEnumDeclaration() || (s.isAggregateDeclaration() && s.ident)) | |
| 228 { | |
| 229 //printf("setScope %s %s\n", s->kind(), s->toChars()); | |
| 230 s.setScope(sc2); | |
| 231 } | |
| 232 } | |
| 233 | |
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234 foreach(Dsymbol s; members) |
| 0 | 235 { |
| 129 | 236 s.semantic(sc2); |
| 237 if (isUnionDeclaration()) | |
| 238 sc2.offset = 0; | |
| 0 | 239 static if (false) { |
| 129 | 240 if (sizeok == 2) |
| 241 { //printf("forward reference\n"); | |
| 242 break; | |
| 243 } | |
| 0 | 244 } |
| 129 | 245 if (auto d = s.isDeclaration()) |
| 176 | 246 { |
| 129 | 247 if (auto t = d.type) { |
| 248 if (t.toBasetype().ty == TY.Tstruct) { | |
| 249 auto ad = t.toDsymbol(sc).isThis(); | |
| 250 /* | |
| 251 StructDeclaration sd = cast(StructDeclaration)foo; | |
| 252 if (foo && !sd) { | |
| 253 writeln(t.classin); | |
| 254 writeln(foo.classinfo.name); | |
| 255 assert(false); | |
| 256 } | |
| 257 */ | |
| 258 if (ad && ad.isnested) | |
| 259 error("inner struct %s cannot be a field", ad.toChars()); | |
| 260 } | |
| 261 } | |
| 262 } | |
| 0 | 263 } |
| 264 | |
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265 version(DMDV1) { |
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266 /* This doesn't work for DMDV2 because (ref S) and (S) parameter |
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267 * lists will overload the same. |
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268 */ |
| 0 | 269 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
| 270 * a parameter that is a pointer to the struct. But if there | |
| 271 * isn't one, but is an opEquals or opCmp with a value, write | |
| 272 * another that is a shell around the value: | |
| 273 * int opCmp(struct *p) { return opCmp(*p); } | |
| 274 */ | |
| 275 | |
| 276 TypeFunction tfeqptr; | |
| 277 { | |
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278 auto arguments = new Parameters; |
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279 auto arg = new Parameter(STC.STCin, handle, Id.p, null); |
| 0 | 280 |
| 129 | 281 arguments.push(arg); |
| 282 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 283 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 0 | 284 } |
| 285 | |
| 286 TypeFunction tfeq; | |
| 287 { | |
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288 auto arguments = new Parameters; |
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289 auto arg = new Parameter(STC.STCin, type, null, null); |
| 0 | 290 |
| 129 | 291 arguments.push(arg); |
| 292 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 293 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 0 | 294 } |
| 295 | |
| 296 Identifier id = Id.eq; | |
| 297 for (int j = 0; j < 2; j++) | |
| 298 { | |
| 299 Dsymbol s = search_function(this, id); | |
| 300 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 301 if (fdx) | |
| 302 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 303 if (!fd) | |
| 304 { fd = fdx.overloadExactMatch(tfeq); | |
| 305 if (fd) | |
| 306 { // Create the thunk, fdptr | |
| 307 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 308 Expression e = new IdentifierExp(loc, Id.p); | |
| 309 e = new PtrExp(loc, e); | |
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310 auto args = new Expressions(); |
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311 args.push(e); |
| 0 | 312 e = new IdentifierExp(loc, id); |
| 313 e = new CallExp(loc, e, args); | |
| 314 fdptr.fbody = new ReturnStatement(loc, e); | |
| 315 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 316 assert(ss); | |
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317 ss.members.push(fdptr); |
| 13 | 318 fdptr.addMember(sc, ss, true); |
| 0 | 319 fdptr.semantic(sc2); |
| 320 } | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 id = Id.cmp; | |
| 325 } | |
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326 } |
| 0 | 327 version (DMDV2) { |
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328 /* Try to find the opEquals function. Build it if necessary. |
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329 */ |
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330 TypeFunction tfeqptr; |
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331 { // bool opEquals(const T*) const; |
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332 auto parameters = new Parameters; |
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333 version(STRUCTTHISREF) { |
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334 // bool opEquals(ref const T) const; |
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335 auto param = new Parameter(STC.STCref, type.constOf(), null, null); |
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336 } else { |
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337 // bool opEquals(const T*) const; |
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338 auto param = new Parameter(STC.STCin, type.pointerTo(), null, null); |
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339 } |
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340 |
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341 parameters.push(param); |
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342 tfeqptr = new TypeFunction(parameters, Type.tbool, 0, LINK.LINKd); |
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343 tfeqptr.mod = MOD.MODconst; |
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344 tfeqptr = cast(TypeFunction)(tfeqptr.semantic(Loc(0), sc2)); |
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345 |
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346 Dsymbol s = search_function(this, Id.eq); |
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347 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; |
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348 if (fdx) |
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349 { |
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350 eq = fdx.overloadExactMatch(tfeqptr); |
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351 if (!eq) |
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352 fdx.error("type signature should be %s not %s", tfeqptr.toChars(), fdx.type.toChars()); |
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353 } |
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354 |
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355 if (!eq) |
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356 eq = buildOpEquals(sc2); |
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357 } |
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358 |
| 0 | 359 dtor = buildDtor(sc2); |
| 360 postblit = buildPostBlit(sc2); | |
| 361 cpctor = buildCpCtor(sc2); | |
| 362 buildOpAssign(sc2); | |
| 363 } | |
| 364 | |
| 365 sc2.pop(); | |
| 366 | |
| 367 if (sizeok == 2) | |
| 179 | 368 { |
| 369 // semantic() failed because of forward references. | |
| 370 // Unwind what we did, and defer it for later | |
| 371 fields.setDim(0); | |
| 372 structsize = 0; | |
| 373 alignsize = 0; | |
| 374 structalign = 0; | |
| 0 | 375 |
| 179 | 376 scope_ = scx ? scx : sc.clone(); |
| 377 scope_.setNoFree(); | |
| 378 scope_.module_.addDeferredSemantic(this); | |
| 379 | |
| 380 global.dprogress = dprogress_save; | |
| 381 //printf("\tdeferring %s\n", toChars()); | |
| 382 return; | |
| 0 | 383 } |
| 384 | |
| 385 // 0 sized struct's are set to 1 byte | |
| 386 if (structsize == 0) | |
| 387 { | |
| 179 | 388 structsize = 1; |
| 389 alignsize = 1; | |
| 0 | 390 } |
| 391 | |
| 392 // Round struct size up to next alignsize boundary. | |
| 393 // This will ensure that arrays of structs will get their internals | |
| 394 // aligned properly. | |
| 395 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 396 | |
| 397 sizeok = 1; | |
| 169 | 398 global.dprogress++; |
| 0 | 399 |
| 400 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 401 | |
| 402 // Determine if struct is all zeros or not | |
| 403 zeroInit = true; | |
|
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404 foreach (VarDeclaration vd; fields) |
| 0 | 405 { |
| 79 | 406 if (vd && !vd.isDataseg()) |
| 0 | 407 { |
| 79 | 408 if (vd.init) |
| 409 { | |
| 410 // Should examine init to see if it is really all 0's | |
| 0 | 411 zeroInit = false; |
| 412 break; | |
| 79 | 413 } |
| 414 else | |
| 415 { | |
| 416 if (!vd.type.isZeroInit(loc)) | |
| 417 { | |
| 418 zeroInit = false; | |
| 419 break; | |
| 420 } | |
| 421 } | |
| 0 | 422 } |
| 423 } | |
| 424 | |
| 425 /* Look for special member functions. | |
| 426 */ | |
| 427 version (DMDV2) { | |
| 428 ctor = search(Loc(0), Id.ctor, 0); | |
| 429 } | |
| 430 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 431 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 432 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 433 | |
| 434 if (sc.func) | |
| 435 { | |
| 436 semantic2(sc); | |
| 437 semantic3(sc); | |
| 438 } | |
| 439 } | |
| 176 | 440 |
|
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441 override Dsymbol search(Loc loc, Identifier ident, int flags) |
| 135 | 442 { |
| 443 //printf("%s.StructDeclaration::search('%s')\n", toChars(), ident->toChars()); | |
| 444 | |
| 445 if (scope_) | |
| 446 semantic(scope_); | |
| 447 | |
| 448 if (!members || !symtab) | |
| 449 { | |
| 450 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 451 return null; | |
| 452 } | |
| 453 | |
| 454 return ScopeDsymbol.search(loc, ident, flags); | |
| 455 } | |
| 456 | |
| 72 | 457 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 458 { |
| 459 assert(false); | |
| 460 } | |
| 176 | 461 |
| 72 | 462 override string mangle() |
| 0 | 463 { |
| 464 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 465 return Dsymbol.mangle(); | |
| 466 } | |
| 176 | 467 |
| 72 | 468 override string kind() |
| 0 | 469 { |
| 470 assert(false); | |
| 471 } | |
|
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472 |
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473 version(DMDV1) |
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474 { |
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475 Expression cloneMembers() |
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476 { |
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477 assert(false); |
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478 } |
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479 } |
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480 |
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481 version(DMDV2) |
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482 { |
| 0 | 483 /******************************************* |
| 484 * We need an opAssign for the struct if | |
| 485 * it has a destructor or a postblit. | |
| 486 * We need to generate one if a user-specified one does not exist. | |
| 487 */ | |
| 488 bool needOpAssign() | |
| 489 { | |
| 490 static if (false) { | |
| 491 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 492 } | |
| 493 if (hasIdentityAssign) | |
| 494 goto Ldontneed; | |
| 495 | |
| 496 if (dtor || postblit) | |
| 497 goto Lneed; | |
| 498 | |
| 499 /* If any of the fields need an opAssign, then we | |
| 500 * need it too. | |
| 501 */ | |
|
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502 foreach (VarDeclaration v; fields) |
| 0 | 503 { |
| 504 assert(v && v.storage_class & STC.STCfield); | |
| 505 if (v.storage_class & STC.STCref) | |
| 506 continue; | |
| 507 Type tv = v.type.toBasetype(); | |
| 508 while (tv.ty == TY.Tsarray) | |
| 509 { TypeSArray ta = cast(TypeSArray)tv; | |
| 510 tv = tv.nextOf().toBasetype(); | |
| 511 } | |
| 512 if (tv.ty == TY.Tstruct) | |
| 513 { TypeStruct ts = cast(TypeStruct)tv; | |
| 514 StructDeclaration sd = ts.sym; | |
| 515 if (sd.needOpAssign()) | |
| 516 goto Lneed; | |
| 517 } | |
| 518 } | |
| 519 Ldontneed: | |
| 520 static if (false) { | |
| 521 printf("\tdontneed\n"); | |
| 522 } | |
| 523 return false; | |
| 524 | |
| 525 Lneed: | |
| 526 static if (false) { | |
| 527 printf("\tneed\n"); | |
| 528 } | |
| 529 return true; | |
| 530 } | |
| 176 | 531 |
|
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532 /******************************************* |
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533 * We need an opEquals for the struct if |
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534 * any fields has an opEquals. |
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535 * Generate one if a user-specified one does not exist. |
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536 */ |
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537 bool needOpEquals() |
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538 { |
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539 enum X = 0; |
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540 static if (X) printf("StructDeclaration::needOpEquals() %s\n", toChars()); |
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541 |
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542 /* If any of the fields has an opEquals, then we |
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543 * need it too. |
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544 */ |
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545 foreach (s; fields) |
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546 { |
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547 VarDeclaration v = s.isVarDeclaration(); |
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548 assert(v && v.storage_class & STC.STCfield); |
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549 if (v.storage_class & STC.STCref) |
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550 continue; |
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551 Type tv = v.type.toBasetype(); |
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552 while (tv.ty == Tsarray) |
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553 { auto ta = cast(TypeSArray)tv; |
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554 tv = tv.nextOf().toBasetype(); |
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555 } |
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556 if (tv.ty == Tstruct) |
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557 { auto ts = cast(TypeStruct)tv; |
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558 StructDeclaration sd = ts.sym; |
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559 if (sd.eq) |
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560 goto Lneed; |
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561 } |
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562 } |
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563 Ldontneed: |
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564 static if (X) printf("\tdontneed\n"); |
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565 return false; |
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566 |
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567 Lneed: |
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568 static if (X) printf("\tneed\n"); |
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569 return true; |
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570 } |
| 176 | 571 |
| 0 | 572 /****************************************** |
| 573 * Build opAssign for struct. | |
| 574 * S* opAssign(S s) { ... } | |
| 575 */ | |
| 576 FuncDeclaration buildOpAssign(Scope sc) | |
| 577 { | |
| 578 if (!needOpAssign()) | |
| 579 return null; | |
| 580 | |
| 581 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 582 | |
| 583 FuncDeclaration fop = null; | |
| 584 | |
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585 auto param = new Parameter(STC.STCnodtor, type, Id.p, null); |
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586 auto fparams = new Parameters; |
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587 fparams.push(param); |
| 0 | 588 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); |
| 589 version (STRUCTTHISREF) { | |
| 590 (cast(TypeFunction)ftype).isref = 1; | |
| 591 } | |
| 592 | |
| 593 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 594 | |
| 595 Expression e = null; | |
| 596 if (postblit) | |
| 597 { /* Swap: | |
| 598 * tmp = *this; *this = s; tmp.dtor(); | |
| 599 */ | |
| 600 //printf("\tswap copy\n"); | |
| 601 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 602 VarDeclaration tmp; | |
| 603 AssignExp ec = null; | |
| 604 if (dtor) | |
| 605 { | |
| 606 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 607 tmp.noauto = true; | |
| 179 | 608 tmp.storage_class |= STCctfe; |
| 0 | 609 e = new DeclarationExp(Loc(0), tmp); |
| 610 | |
| 611 Expression e2; | |
| 612 version (STRUCTTHISREF) { | |
| 613 e2 = new ThisExp(Loc(0)); | |
| 614 } else { | |
| 615 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 616 } | |
| 617 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 618 ec.op = TOK.TOKblit; | |
| 619 e = Expression.combine(e, ec); | |
| 620 } | |
| 621 Expression e2; | |
| 622 version (STRUCTTHISREF) { | |
| 623 e2 = new ThisExp(Loc(0)); | |
| 624 } else { | |
| 625 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 626 } | |
| 176 | 627 |
| 0 | 628 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); |
| 629 ec.op = TOK.TOKblit; | |
| 630 e = Expression.combine(e, ec); | |
| 631 if (dtor) | |
| 632 { | |
| 633 /* Instead of running the destructor on s, run it | |
| 634 * on tmp. This avoids needing to copy tmp back in to s. | |
| 635 */ | |
| 636 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 637 ecc = new CallExp(Loc(0), ecc); | |
| 638 e = Expression.combine(e, ecc); | |
| 639 } | |
| 640 } | |
| 641 else | |
| 642 { /* Do memberwise copy | |
| 643 */ | |
| 644 //printf("\tmemberwise copy\n"); | |
|
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645 foreach (VarDeclaration v; fields) |
| 0 | 646 { |
| 647 assert(v && v.storage_class & STC.STCfield); | |
| 648 // this.v = s.v; | |
| 649 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)); | |
| 650 ec.op = TOK.TOKblit; | |
| 651 e = Expression.combine(e, ec); | |
| 652 } | |
| 653 } | |
| 654 Statement s1 = new ExpStatement(Loc(0), e); | |
| 655 | |
| 656 /* Add: | |
| 657 * return this; | |
| 658 */ | |
| 659 e = new ThisExp(Loc(0)); | |
| 660 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 661 | |
| 662 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 663 | |
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664 members.push(fop); |
| 13 | 665 fop.addMember(sc, this, true); |
| 0 | 666 |
| 667 sc = sc.push(); | |
| 668 sc.stc = STC.STCundefined; | |
| 669 sc.linkage = LINK.LINKd; | |
| 670 | |
| 671 fop.semantic(sc); | |
| 672 | |
| 673 sc.pop(); | |
| 674 | |
| 675 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 676 | |
| 677 return fop; | |
| 678 } | |
| 176 | 679 |
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680 /****************************************** |
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681 * Build opEquals for struct. |
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682 * const bool opEquals(const ref S s) { ... } |
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683 */ |
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684 FuncDeclaration buildOpEquals(Scope sc) |
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685 { |
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686 if (!needOpEquals()) |
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687 return null; |
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688 //printf("StructDeclaration::buildOpEquals() %s\n", toChars()); |
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689 Loc loc = this.loc; |
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690 |
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691 auto parameters = new Parameters; |
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692 version (STRUCTTHISREF) { |
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693 // bool opEquals(ref const T) const; |
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694 auto param = new Parameter(STC.STCref, type.constOf(), Id.p, null); |
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695 } else { |
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696 // bool opEquals(const T*) const; |
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697 auto param = new Parameter(STC.STCin, type.pointerTo(), Id.p, null); |
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698 } |
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699 |
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700 parameters.push(param); |
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701 auto ftype = new TypeFunction(parameters, Type.tbool, 0, LINKd); |
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702 ftype.mod = MOD.MODconst; |
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703 ftype = cast(TypeFunction)ftype.semantic(loc, sc); |
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704 |
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705 auto fop = new FuncDeclaration(loc, Loc(0), Id.eq, STC.STCundefined, ftype); |
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706 |
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707 Expression e = null; |
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708 /* Do memberwise compare |
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709 */ |
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710 //printf("\tmemberwise compare\n"); |
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711 foreach (s; fields) |
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712 { |
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713 VarDeclaration v = s.isVarDeclaration(); |
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714 assert(v && v.storage_class & STC.STCfield); |
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715 if (v.storage_class & STC.STCref) |
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716 assert(0); // what should we do with this? |
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717 // this.v == s.v; |
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718 auto ec = new EqualExp(TOKequal, loc, |
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719 new DotVarExp(loc, new ThisExp(loc), v, 0), |
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720 new DotVarExp(loc, new IdentifierExp(loc, Id.p), v, 0)); |
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721 if (e) |
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722 e = new AndAndExp(loc, e, ec); |
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723 else |
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724 e = ec; |
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725 } |
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726 if (!e) |
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727 e = new IntegerExp(loc, 1, Type.tbool); |
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728 fop.fbody = new ReturnStatement(loc, e); |
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729 |
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730 members.push(fop); |
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731 fop.addMember(sc, this, 1); |
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732 |
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733 sc = sc.push(); |
| 139 | 734 sc.stc = STCundefined; |
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735 sc.linkage = LINK.LINKd; |
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736 |
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737 fop.semantic(sc); |
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738 |
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739 sc.pop(); |
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740 |
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741 //printf("-StructDeclaration::buildOpEquals() %s\n", toChars()); |
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742 |
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743 return fop; |
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744 } |
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745 |
| 0 | 746 /***************************************** |
| 747 * Create inclusive postblit for struct by aggregating | |
| 748 * all the postblits in postblits[] with the postblits for | |
| 749 * all the members. | |
| 750 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 751 * and the ordering changes (runs forward instead of backwards). | |
| 752 */ | |
| 753 | |
| 754 version (DMDV2) { | |
| 755 FuncDeclaration buildPostBlit(Scope sc) | |
| 756 { | |
| 757 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 758 Expression e = null; | |
| 179 | 759 StorageClass stc = STCundefined; |
| 0 | 760 |
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761 foreach (VarDeclaration v; fields) |
| 0 | 762 { |
| 79 | 763 assert(v && v.storage_class & STC.STCfield); |
| 764 if (v.storage_class & STC.STCref) | |
| 765 continue; | |
| 766 Type tv = v.type.toBasetype(); | |
| 767 size_t dim = 1; | |
| 768 while (tv.ty == TY.Tsarray) | |
| 179 | 769 { |
| 770 TypeSArray ta = cast(TypeSArray)tv; | |
| 79 | 771 dim *= (cast(TypeSArray)tv).dim.toInteger(); |
| 772 tv = tv.nextOf().toBasetype(); | |
| 0 | 773 } |
| 79 | 774 if (tv.ty == TY.Tstruct) |
| 179 | 775 { |
| 776 TypeStruct ts = cast(TypeStruct)tv; | |
| 79 | 777 StructDeclaration sd = ts.sym; |
| 778 if (sd.postblit) | |
| 179 | 779 { |
| 780 Expression ex; | |
| 781 | |
| 782 stc |= sd.postblit.storage_class & STCdisable; | |
| 176 | 783 |
| 179 | 784 // this.v |
| 785 ex = new ThisExp(Loc(0)); | |
| 786 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 176 | 787 |
| 179 | 788 if (dim == 1) |
| 789 { // this.v.postblit() | |
| 790 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 791 ex = new CallExp(Loc(0), ex); | |
| 792 } | |
| 793 else | |
| 794 { | |
| 795 // Typeinfo.postblit(cast(void*)&this.v); | |
| 796 Expression ea = new AddrExp(Loc(0), ex); | |
| 797 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 176 | 798 |
| 179 | 799 Expression et = v.type.getTypeInfo(sc); |
| 800 et = new DotIdExp(Loc(0), et, Id._postblit); | |
| 176 | 801 |
| 179 | 802 ex = new CallExp(Loc(0), et, ea); |
| 803 } | |
| 804 e = Expression.combine(e, ex); // combine in forward order | |
| 79 | 805 } |
| 0 | 806 } |
| 807 } | |
| 808 | |
| 809 /* Build our own "postblit" which executes e | |
| 810 */ | |
| 811 if (e) | |
| 179 | 812 { |
| 813 //printf("Building __fieldPostBlit()\n"); | |
| 814 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); | |
| 815 dd.storage_class |= stc; | |
| 816 dd.fbody = new ExpStatement(Loc(0), e); | |
| 817 postblits.shift(dd); | |
| 818 members.push(dd); | |
| 819 dd.semantic(sc); | |
| 0 | 820 } |
| 821 | |
| 822 switch (postblits.dim) | |
| 823 { | |
| 824 case 0: | |
| 825 return null; | |
| 826 | |
| 827 case 1: | |
|
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828 return cast(FuncDeclaration)postblits[0]; |
| 0 | 829 |
| 830 default: | |
| 831 e = null; | |
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832 foreach(FuncDeclaration fd; postblits) |
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833 { |
| 179 | 834 Expression ex = new ThisExp(Loc(0)); |
| 835 stc |= fd.storage_class & STCdisable; | |
| 836 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 837 ex = new CallExp(Loc(0), ex); | |
| 838 e = Expression.combine(e, ex); | |
| 0 | 839 } |
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840 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 179 | 841 dd.storage_class |= stc; |
| 0 | 842 dd.fbody = new ExpStatement(Loc(0), e); |
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843 members.push(dd); |
| 0 | 844 dd.semantic(sc); |
| 845 return dd; | |
| 846 } | |
| 847 } | |
| 848 } | |
| 849 | |
| 850 /******************************************* | |
| 851 * Build copy constructor for struct. | |
| 852 * Copy constructors are compiler generated only, and are only | |
| 853 * callable from the compiler. They are not user accessible. | |
| 854 * A copy constructor is: | |
| 855 * void cpctpr(ref S s) | |
| 856 * { | |
| 857 * *this = s; | |
| 858 * this.postBlit(); | |
| 859 * } | |
| 860 * This is done so: | |
| 861 * - postBlit() never sees uninitialized data | |
| 862 * - memcpy can be much more efficient than memberwise copy | |
| 863 * - no fields are overlooked | |
| 864 */ | |
| 865 FuncDeclaration buildCpCtor(Scope sc) | |
| 866 { | |
| 867 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 868 FuncDeclaration fcp = null; | |
| 869 | |
| 870 /* Copy constructor is only necessary if there is a postblit function, | |
| 871 * otherwise the code generator will just do a bit copy. | |
| 872 */ | |
| 873 if (postblit) | |
| 874 { | |
| 129 | 875 //printf("generating cpctor\n"); |
| 0 | 876 |
|
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877 auto param = new Parameter(STC.STCref, type, Id.p, null); |
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878 auto fparams = new Parameters; |
| 129 | 879 fparams.push(param); |
| 880 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 0 | 881 |
| 129 | 882 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); |
| 179 | 883 fcp.storage_class |= postblit.storage_class & STCdisable; |
| 0 | 884 |
| 129 | 885 // Build *this = p; |
| 886 Expression e = new ThisExp(Loc(0)); | |
| 0 | 887 version (STRUCTTHISREF) { |
| 888 } else { | |
| 129 | 889 e = new PtrExp(Loc(0), e); |
| 0 | 890 } |
| 129 | 891 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); |
| 892 ea.op = TOK.TOKblit; | |
| 893 Statement s = new ExpStatement(Loc(0), ea); | |
| 0 | 894 |
| 129 | 895 // Build postBlit(); |
| 896 e = new VarExp(Loc(0), postblit, 0); | |
| 897 e = new CallExp(Loc(0), e); | |
| 0 | 898 |
| 129 | 899 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); |
| 900 fcp.fbody = s; | |
| 0 | 901 |
| 129 | 902 members.push(fcp); |
| 0 | 903 |
| 129 | 904 sc = sc.push(); |
| 905 sc.stc = STC.STCundefined; | |
| 906 sc.linkage = LINK.LINKd; | |
| 0 | 907 |
| 129 | 908 fcp.semantic(sc); |
| 0 | 909 |
| 129 | 910 sc.pop(); |
| 0 | 911 } |
| 912 | |
| 913 return fcp; | |
| 914 } | |
|
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915 } |
| 72 | 916 override void toDocBuffer(OutBuffer buf) |
| 0 | 917 { |
| 918 assert(false); | |
| 919 } | |
| 176 | 920 |
| 72 | 921 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 922 { |
| 923 assert(false); | |
| 924 } | |
| 925 | |
| 72 | 926 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 927 { |
| 928 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 929 | |
| 930 if (multiobj) | |
| 176 | 931 { |
| 0 | 932 obj_append(this); |
| 933 return; | |
| 934 } | |
| 935 | |
| 936 // Anonymous structs/unions only exist as part of others, | |
| 937 // do not output forward referenced structs's | |
| 938 if (!isAnonymous() && members) | |
| 939 { | |
| 940 if (global.params.symdebug) { | |
| 941 toDebug(); | |
| 942 } | |
| 943 | |
| 944 type.getTypeInfo(null); // generate TypeInfo | |
| 945 | |
| 946 if (true) | |
| 947 { | |
| 948 // Generate static initializer | |
| 949 toInitializer(); | |
| 950 | |
| 951 static if (false) { | |
| 952 sinit.Sclass = SC.SCcomdat; | |
| 953 } else { | |
| 954 if (inTemplateInstance()) | |
| 955 { | |
| 956 sinit.Sclass = SC.SCcomdat; | |
| 957 } | |
| 958 else | |
| 959 { | |
| 960 sinit.Sclass = SC.SCglobal; | |
| 961 } | |
| 962 } | |
| 963 sinit.Sfl = FL.FLdata; | |
| 964 | |
| 965 toDt(&sinit.Sdt); | |
| 966 | |
| 95 | 967 version (OMFOBJ) |
| 968 { | |
| 0 | 969 /* For OMF, common blocks aren't pulled in from the library. |
| 970 */ | |
| 971 /* ELF comdef's generate multiple | |
| 972 * definition errors for them from the gnu linker. | |
| 973 * Need to figure out how to generate proper comdef's for ELF. | |
| 974 */ | |
| 975 // See if we can convert a comdat to a comdef, | |
| 976 // which saves on exe file space. | |
| 95 | 977 if (0 && // causes multiple def problems with COMMON in one file and COMDAT in library |
| 978 sinit.Sclass == SCcomdat && | |
| 0 | 979 sinit.Sdt && |
| 980 sinit.Sdt.dt == DT.DT_azeros && | |
| 981 sinit.Sdt.DTnext == null && | |
| 982 !global.params.multiobj) | |
| 983 { | |
| 984 sinit.Sclass = SC.SCglobal; | |
| 985 sinit.Sdt.dt = DT.DT_common; | |
| 986 } | |
| 987 } | |
| 988 | |
| 989 version (ELFOBJ) { | |
| 990 sinit.Sseg = Segment.CDATA; | |
| 991 } | |
| 992 version (MACHOBJ) { | |
| 993 sinit.Sseg = Segment.DATA; | |
| 994 } | |
| 995 outdata(sinit); | |
| 996 } | |
| 997 | |
| 998 // Put out the members | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
999 foreach(Dsymbol member; members) |
| 0 | 1000 member.toObjFile(0); |
| 1001 } | |
| 1002 } | |
| 176 | 1003 |
| 0 | 1004 void toDt(dt_t** pdt) |
| 1005 { | |
| 1006 uint offset; | |
| 1007 dt_t* dt; | |
| 1008 | |
| 1009 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 1010 offset = 0; | |
| 1011 | |
| 1012 // Note equivalence of this loop to class's | |
| 79 | 1013 for (uint i = 0; i < fields.dim; i++) |
| 0 | 1014 { |
| 79 | 1015 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 1016 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 1017 dt = null; | |
| 1018 int sz; | |
| 1019 | |
| 1020 if (v.storage_class & STC.STCref) | |
| 1021 { | |
| 1022 sz = PTRSIZE; | |
| 1023 if (v.offset >= offset) | |
| 1024 dtnzeros(&dt, sz); | |
| 1025 } | |
| 1026 else | |
| 1027 { | |
| 1028 sz = cast(uint)v.type.size(); | |
| 1029 Initializer init = v.init; | |
| 1030 if (init) | |
| 176 | 1031 { |
| 0 | 1032 //printf("\t\thas initializer %s\n", init.toChars()); |
| 1033 ExpInitializer ei = init.isExpInitializer(); | |
| 1034 Type tb = v.type.toBasetype(); | |
| 1035 if (ei && tb.ty == TY.Tsarray) | |
| 1036 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 1037 else | |
| 1038 dt = init.toDt(); | |
| 1039 } | |
| 1040 else if (v.offset >= offset) | |
| 1041 v.type.toDt(&dt); | |
| 1042 } | |
| 1043 if (dt) | |
| 1044 { | |
| 1045 if (v.offset < offset) | |
| 1046 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 1047 else | |
| 1048 { | |
| 1049 if (offset < v.offset) | |
| 1050 dtnzeros(pdt, v.offset - offset); | |
| 1051 dtcat(pdt, dt); | |
| 1052 offset = v.offset + sz; | |
| 1053 } | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 if (offset < structsize) | |
| 1058 dtnzeros(pdt, structsize - offset); | |
| 1059 | |
| 1060 dt_optimize(*pdt); | |
| 1061 } | |
| 176 | 1062 |
| 0 | 1063 void toDebug() // to symbolic debug info |
| 1064 { | |
| 1065 assert(false); | |
| 1066 } | |
| 1067 | |
| 72 | 1068 override StructDeclaration isStructDeclaration() { return this; } |
| 1069 } |