Mercurial > projects > ddmd
annotate dmd/StructDeclaration.d @ 187:b0d41ff5e0df
Added expandability scheme outlined in http://www.dsource.org/forums/viewtopic.php?t=5659&sid=6f2150ff5b0bffcd47512a6a7608d218
| author | Abscissa |
|---|---|
| date | Tue, 07 Jun 2011 23:37:34 -0400 |
| parents | cd48cb899aee |
| children |
| 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 | |
|
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70 import dmd.DDMDExtensions; |
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71 |
| 0 | 72 class StructDeclaration : AggregateDeclaration |
| 73 { | |
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74 mixin insertMemberExtension!(typeof(this)); |
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75 |
| 0 | 76 bool zeroInit; // true if initialize with 0 fill |
| 176 | 77 |
| 0 | 78 version (DMDV2) { |
| 79 int hasIdentityAssign; // !=0 if has identity opAssign | |
| 80 FuncDeclaration cpctor; // generated copy-constructor, if any | |
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81 FuncDeclaration eq; // bool opEquals(ref const T), if any |
| 0 | 82 |
| 83 FuncDeclarations postblits; // Array of postblit functions | |
| 84 FuncDeclaration postblit; // aggregate postblit | |
| 85 } | |
| 86 | |
| 87 this(Loc loc, Identifier id) | |
| 88 { | |
| 178 | 89 register(); |
| 0 | 90 super(loc, id); |
| 91 | |
| 92 // For forward references | |
| 93 type = new TypeStruct(this); | |
| 176 | 94 |
| 0 | 95 postblits = new FuncDeclarations(); /// |
| 96 } | |
| 176 | 97 |
| 72 | 98 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 99 { |
| 49 | 100 StructDeclaration sd; |
| 101 | |
| 102 if (s) | |
| 103 sd = cast(StructDeclaration)s; | |
| 104 else | |
| 105 sd = new StructDeclaration(loc, ident); | |
| 106 ScopeDsymbol.syntaxCopy(sd); | |
| 107 return sd; | |
| 0 | 108 } |
| 176 | 109 |
| 72 | 110 override void semantic(Scope sc) |
| 0 | 111 { |
| 112 Scope sc2; | |
| 113 | |
| 138 | 114 //writef("+StructDeclaration.semantic(this=%p, '%s', sizeok = %d)\n", this, toChars(), sizeok); |
| 0 | 115 |
| 138 | 116 //static int count; if (++count == 20) halt(); |
| 0 | 117 |
| 118 assert(type); | |
| 119 if (!members) // if forward reference | |
| 120 return; | |
| 121 | |
| 138 | 122 if (sizeok == 1 || symtab) |
| 123 { | |
| 124 if (!scope_) | |
| 125 { | |
| 126 // writef("already completed\n"); | |
| 127 scope_ = null; | |
| 0 | 128 return; // semantic() already completed |
| 138 | 129 } |
| 0 | 130 } |
| 131 else | |
| 132 symtab = new DsymbolTable(); | |
| 133 | |
| 134 Scope scx = null; | |
| 135 if (scope_) | |
| 136 { sc = scope_; | |
| 137 scx = scope_; // save so we don't make redundant copies | |
| 138 scope_ = null; | |
| 139 } | |
| 179 | 140 |
| 141 uint dprogress_save = global.dprogress; | |
| 0 | 142 |
| 143 parent = sc.parent; | |
| 144 type = type.semantic(loc, sc); | |
| 145 version (STRUCTTHISREF) { | |
| 146 handle = type; | |
| 147 } else { | |
| 148 handle = type.pointerTo(); | |
| 149 } | |
| 150 structalign = sc.structalign; | |
| 151 protection = sc.protection; | |
| 152 storage_class |= sc.stc; | |
| 153 if (sc.stc & STC.STCdeprecated) | |
| 154 isdeprecated = 1; | |
| 155 assert(!isAnonymous()); | |
| 156 if (sc.stc & STC.STCabstract) | |
| 157 error("structs, unions cannot be abstract"); | |
| 158 version (DMDV2) { | |
| 159 if (storage_class & STC.STCimmutable) | |
| 160 type = type.invariantOf(); | |
| 161 else if (storage_class & STC.STCconst) | |
| 162 type = type.constOf(); | |
| 163 else if (storage_class & STC.STCshared) | |
| 164 type = type.sharedOf(); | |
| 165 } | |
| 166 | |
| 167 if (sizeok == 0) // if not already done the addMember step | |
| 168 { | |
| 169 int hasfunctions = 0; | |
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170 foreach(Dsymbol s; members) |
| 0 | 171 { |
| 172 //printf("adding member '%s' to '%s'\n", s.toChars(), this.toChars()); | |
| 13 | 173 s.addMember(sc, this, true); |
| 0 | 174 if (s.isFuncDeclaration()) |
| 175 hasfunctions = 1; | |
| 176 } | |
| 177 | |
| 178 // If nested struct, add in hidden 'this' pointer to outer scope | |
| 179 if (hasfunctions && !(storage_class & STC.STCstatic)) | |
| 180 { Dsymbol s = toParent2(); | |
| 181 if (s) | |
| 182 { | |
| 183 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 184 FuncDeclaration fd = s.isFuncDeclaration(); | |
| 185 | |
| 186 TemplateInstance ti; | |
| 187 if (ad && (ti = ad.parent.isTemplateInstance()) !is null && ti.isnested || fd) | |
| 188 { isnested = true; | |
| 189 Type t; | |
| 190 if (ad) | |
| 191 t = ad.handle; | |
| 192 else if (fd) | |
| 176 | 193 { |
| 0 | 194 AggregateDeclaration add = fd.isMember2(); |
| 195 if (add) | |
| 196 t = add.handle; | |
| 197 else | |
| 176 | 198 t = global.tvoidptr; |
| 0 | 199 } |
| 200 else | |
| 201 assert(0); | |
| 202 if (t.ty == TY.Tstruct) | |
| 176 | 203 t = global.tvoidptr; // t should not be a ref type |
| 0 | 204 assert(!vthis); |
| 205 vthis = new ThisDeclaration(loc, t); | |
| 206 //vthis.storage_class |= STC.STCref; | |
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207 members.push(vthis); |
| 0 | 208 } |
| 209 } | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 sizeok = 0; | |
| 214 sc2 = sc.push(this); | |
| 215 sc2.stc &= storage_class & STC.STC_TYPECTOR; | |
| 216 sc2.parent = this; | |
| 217 if (isUnionDeclaration()) | |
| 218 sc2.inunion = 1; | |
| 219 sc2.protection = PROT.PROTpublic; | |
| 220 sc2.explicitProtection = 0; | |
| 221 | |
| 135 | 222 |
| 223 /* Set scope so if there are forward references, we still might be able to | |
| 224 * resolve individual members like enums. | |
| 225 */ | |
| 226 foreach (s; members) | |
| 227 { | |
| 228 /* There are problems doing this in the general case because | |
| 229 * Scope keeps track of things like 'offset' | |
| 230 */ | |
| 231 if (s.isEnumDeclaration() || (s.isAggregateDeclaration() && s.ident)) | |
| 232 { | |
| 233 //printf("setScope %s %s\n", s->kind(), s->toChars()); | |
| 234 s.setScope(sc2); | |
| 235 } | |
| 236 } | |
| 237 | |
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238 foreach(Dsymbol s; members) |
| 0 | 239 { |
| 129 | 240 s.semantic(sc2); |
| 241 if (isUnionDeclaration()) | |
| 242 sc2.offset = 0; | |
| 0 | 243 static if (false) { |
| 129 | 244 if (sizeok == 2) |
| 245 { //printf("forward reference\n"); | |
| 246 break; | |
| 247 } | |
| 0 | 248 } |
| 129 | 249 if (auto d = s.isDeclaration()) |
| 176 | 250 { |
| 129 | 251 if (auto t = d.type) { |
| 252 if (t.toBasetype().ty == TY.Tstruct) { | |
| 253 auto ad = t.toDsymbol(sc).isThis(); | |
| 254 /* | |
| 255 StructDeclaration sd = cast(StructDeclaration)foo; | |
| 256 if (foo && !sd) { | |
| 257 writeln(t.classin); | |
| 258 writeln(foo.classinfo.name); | |
| 259 assert(false); | |
| 260 } | |
| 261 */ | |
| 262 if (ad && ad.isnested) | |
| 263 error("inner struct %s cannot be a field", ad.toChars()); | |
| 264 } | |
| 265 } | |
| 266 } | |
| 0 | 267 } |
| 268 | |
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269 version(DMDV1) { |
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270 /* This doesn't work for DMDV2 because (ref S) and (S) parameter |
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271 * lists will overload the same. |
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272 */ |
| 0 | 273 /* The TypeInfo_Struct is expecting an opEquals and opCmp with |
| 274 * a parameter that is a pointer to the struct. But if there | |
| 275 * isn't one, but is an opEquals or opCmp with a value, write | |
| 276 * another that is a shell around the value: | |
| 277 * int opCmp(struct *p) { return opCmp(*p); } | |
| 278 */ | |
| 279 | |
| 280 TypeFunction tfeqptr; | |
| 281 { | |
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282 auto arguments = new Parameters; |
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283 auto arg = new Parameter(STC.STCin, handle, Id.p, null); |
| 0 | 284 |
| 129 | 285 arguments.push(arg); |
| 286 tfeqptr = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 287 tfeqptr = cast(TypeFunction)tfeqptr.semantic(Loc(0), sc); | |
| 0 | 288 } |
| 289 | |
| 290 TypeFunction tfeq; | |
| 291 { | |
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292 auto arguments = new Parameters; |
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293 auto arg = new Parameter(STC.STCin, type, null, null); |
| 0 | 294 |
| 129 | 295 arguments.push(arg); |
| 296 tfeq = new TypeFunction(arguments, Type.tint32, 0, LINK.LINKd); | |
| 297 tfeq = cast(TypeFunction)tfeq.semantic(Loc(0), sc); | |
| 0 | 298 } |
| 299 | |
| 300 Identifier id = Id.eq; | |
| 301 for (int j = 0; j < 2; j++) | |
| 302 { | |
| 303 Dsymbol s = search_function(this, id); | |
| 304 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; | |
| 305 if (fdx) | |
| 306 { FuncDeclaration fd = fdx.overloadExactMatch(tfeqptr); | |
| 307 if (!fd) | |
| 308 { fd = fdx.overloadExactMatch(tfeq); | |
| 309 if (fd) | |
| 310 { // Create the thunk, fdptr | |
| 311 FuncDeclaration fdptr = new FuncDeclaration(loc, loc, fdx.ident, STC.STCundefined, tfeqptr); | |
| 312 Expression e = new IdentifierExp(loc, Id.p); | |
| 313 e = new PtrExp(loc, e); | |
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314 auto args = new Expressions(); |
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315 args.push(e); |
| 0 | 316 e = new IdentifierExp(loc, id); |
| 317 e = new CallExp(loc, e, args); | |
| 318 fdptr.fbody = new ReturnStatement(loc, e); | |
| 319 ScopeDsymbol ss = fdx.parent.isScopeDsymbol(); | |
| 320 assert(ss); | |
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321 ss.members.push(fdptr); |
| 13 | 322 fdptr.addMember(sc, ss, true); |
| 0 | 323 fdptr.semantic(sc2); |
| 324 } | |
| 325 } | |
| 326 } | |
| 327 | |
| 328 id = Id.cmp; | |
| 329 } | |
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330 } |
| 0 | 331 version (DMDV2) { |
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332 /* Try to find the opEquals function. Build it if necessary. |
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333 */ |
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334 TypeFunction tfeqptr; |
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335 { // bool opEquals(const T*) const; |
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336 auto parameters = new Parameters; |
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337 version(STRUCTTHISREF) { |
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338 // bool opEquals(ref const T) const; |
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339 auto param = new Parameter(STC.STCref, type.constOf(), null, null); |
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340 } else { |
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341 // bool opEquals(const T*) const; |
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342 auto param = new Parameter(STC.STCin, type.pointerTo(), null, null); |
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343 } |
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344 |
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345 parameters.push(param); |
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346 tfeqptr = new TypeFunction(parameters, Type.tbool, 0, LINK.LINKd); |
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347 tfeqptr.mod = MOD.MODconst; |
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348 tfeqptr = cast(TypeFunction)(tfeqptr.semantic(Loc(0), sc2)); |
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349 |
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350 Dsymbol s = search_function(this, Id.eq); |
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351 FuncDeclaration fdx = s ? s.isFuncDeclaration() : null; |
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352 if (fdx) |
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353 { |
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354 eq = fdx.overloadExactMatch(tfeqptr); |
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355 if (!eq) |
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356 fdx.error("type signature should be %s not %s", tfeqptr.toChars(), fdx.type.toChars()); |
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357 } |
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358 |
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359 if (!eq) |
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360 eq = buildOpEquals(sc2); |
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361 } |
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362 |
| 0 | 363 dtor = buildDtor(sc2); |
| 364 postblit = buildPostBlit(sc2); | |
| 365 cpctor = buildCpCtor(sc2); | |
| 366 buildOpAssign(sc2); | |
| 367 } | |
| 368 | |
| 369 sc2.pop(); | |
| 370 | |
| 371 if (sizeok == 2) | |
| 179 | 372 { |
| 373 // semantic() failed because of forward references. | |
| 374 // Unwind what we did, and defer it for later | |
| 375 fields.setDim(0); | |
| 376 structsize = 0; | |
| 377 alignsize = 0; | |
| 378 structalign = 0; | |
| 0 | 379 |
| 179 | 380 scope_ = scx ? scx : sc.clone(); |
| 381 scope_.setNoFree(); | |
| 382 scope_.module_.addDeferredSemantic(this); | |
| 383 | |
| 384 global.dprogress = dprogress_save; | |
| 385 //printf("\tdeferring %s\n", toChars()); | |
| 386 return; | |
| 0 | 387 } |
| 388 | |
| 389 // 0 sized struct's are set to 1 byte | |
| 390 if (structsize == 0) | |
| 391 { | |
| 179 | 392 structsize = 1; |
| 393 alignsize = 1; | |
| 0 | 394 } |
| 395 | |
| 396 // Round struct size up to next alignsize boundary. | |
| 397 // This will ensure that arrays of structs will get their internals | |
| 398 // aligned properly. | |
| 399 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
| 400 | |
| 401 sizeok = 1; | |
| 169 | 402 global.dprogress++; |
| 0 | 403 |
| 404 //printf("-StructDeclaration.semantic(this=%p, '%s')\n", this, toChars()); | |
| 405 | |
| 406 // Determine if struct is all zeros or not | |
| 407 zeroInit = true; | |
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408 foreach (VarDeclaration vd; fields) |
| 0 | 409 { |
| 79 | 410 if (vd && !vd.isDataseg()) |
| 0 | 411 { |
| 79 | 412 if (vd.init) |
| 413 { | |
| 414 // Should examine init to see if it is really all 0's | |
| 0 | 415 zeroInit = false; |
| 416 break; | |
| 79 | 417 } |
| 418 else | |
| 419 { | |
| 420 if (!vd.type.isZeroInit(loc)) | |
| 421 { | |
| 422 zeroInit = false; | |
| 423 break; | |
| 424 } | |
| 425 } | |
| 0 | 426 } |
| 427 } | |
| 428 | |
| 429 /* Look for special member functions. | |
| 430 */ | |
| 431 version (DMDV2) { | |
| 432 ctor = search(Loc(0), Id.ctor, 0); | |
| 433 } | |
| 434 inv = cast(InvariantDeclaration)search(Loc(0), Id.classInvariant, 0); | |
| 435 aggNew = cast(NewDeclaration)search(Loc(0), Id.classNew, 0); | |
| 436 aggDelete = cast(DeleteDeclaration)search(Loc(0), Id.classDelete, 0); | |
| 437 | |
| 438 if (sc.func) | |
| 439 { | |
| 440 semantic2(sc); | |
| 441 semantic3(sc); | |
| 442 } | |
| 443 } | |
| 176 | 444 |
|
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445 override Dsymbol search(Loc loc, Identifier ident, int flags) |
| 135 | 446 { |
| 447 //printf("%s.StructDeclaration::search('%s')\n", toChars(), ident->toChars()); | |
| 448 | |
| 449 if (scope_) | |
| 450 semantic(scope_); | |
| 451 | |
| 452 if (!members || !symtab) | |
| 453 { | |
| 454 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 455 return null; | |
| 456 } | |
| 457 | |
| 458 return ScopeDsymbol.search(loc, ident, flags); | |
| 459 } | |
| 460 | |
| 72 | 461 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 462 { |
| 463 assert(false); | |
| 464 } | |
| 176 | 465 |
| 72 | 466 override string mangle() |
| 0 | 467 { |
| 468 //printf("StructDeclaration.mangle() '%s'\n", toChars()); | |
| 469 return Dsymbol.mangle(); | |
| 470 } | |
| 176 | 471 |
| 72 | 472 override string kind() |
| 0 | 473 { |
| 474 assert(false); | |
| 475 } | |
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476 |
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477 version(DMDV1) |
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478 { |
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479 Expression cloneMembers() |
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480 { |
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481 assert(false); |
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482 } |
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483 } |
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484 |
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485 version(DMDV2) |
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486 { |
| 0 | 487 /******************************************* |
| 488 * We need an opAssign for the struct if | |
| 489 * it has a destructor or a postblit. | |
| 490 * We need to generate one if a user-specified one does not exist. | |
| 491 */ | |
| 492 bool needOpAssign() | |
| 493 { | |
| 494 static if (false) { | |
| 495 printf("StructDeclaration.needOpAssign() %s\n", toChars()); | |
| 496 } | |
| 497 if (hasIdentityAssign) | |
| 498 goto Ldontneed; | |
| 499 | |
| 500 if (dtor || postblit) | |
| 501 goto Lneed; | |
| 502 | |
| 503 /* If any of the fields need an opAssign, then we | |
| 504 * need it too. | |
| 505 */ | |
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506 foreach (VarDeclaration v; fields) |
| 0 | 507 { |
| 508 assert(v && v.storage_class & STC.STCfield); | |
| 509 if (v.storage_class & STC.STCref) | |
| 510 continue; | |
| 511 Type tv = v.type.toBasetype(); | |
| 512 while (tv.ty == TY.Tsarray) | |
| 513 { TypeSArray ta = cast(TypeSArray)tv; | |
| 514 tv = tv.nextOf().toBasetype(); | |
| 515 } | |
| 516 if (tv.ty == TY.Tstruct) | |
| 517 { TypeStruct ts = cast(TypeStruct)tv; | |
| 518 StructDeclaration sd = ts.sym; | |
| 519 if (sd.needOpAssign()) | |
| 520 goto Lneed; | |
| 521 } | |
| 522 } | |
| 523 Ldontneed: | |
| 524 static if (false) { | |
| 525 printf("\tdontneed\n"); | |
| 526 } | |
| 527 return false; | |
| 528 | |
| 529 Lneed: | |
| 530 static if (false) { | |
| 531 printf("\tneed\n"); | |
| 532 } | |
| 533 return true; | |
| 534 } | |
| 176 | 535 |
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536 /******************************************* |
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537 * We need an opEquals for the struct if |
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538 * any fields has an opEquals. |
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539 * Generate one if a user-specified one does not exist. |
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540 */ |
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541 bool needOpEquals() |
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542 { |
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543 enum X = 0; |
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544 static if (X) printf("StructDeclaration::needOpEquals() %s\n", toChars()); |
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545 |
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546 /* If any of the fields has an opEquals, then we |
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547 * need it too. |
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548 */ |
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549 foreach (s; fields) |
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550 { |
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551 VarDeclaration v = s.isVarDeclaration(); |
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552 assert(v && v.storage_class & STC.STCfield); |
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553 if (v.storage_class & STC.STCref) |
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554 continue; |
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555 Type tv = v.type.toBasetype(); |
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556 while (tv.ty == Tsarray) |
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557 { auto ta = cast(TypeSArray)tv; |
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558 tv = tv.nextOf().toBasetype(); |
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559 } |
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560 if (tv.ty == Tstruct) |
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561 { auto ts = cast(TypeStruct)tv; |
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562 StructDeclaration sd = ts.sym; |
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563 if (sd.eq) |
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564 goto Lneed; |
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565 } |
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566 } |
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567 Ldontneed: |
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568 static if (X) printf("\tdontneed\n"); |
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569 return false; |
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570 |
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571 Lneed: |
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572 static if (X) printf("\tneed\n"); |
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573 return true; |
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574 } |
| 176 | 575 |
| 0 | 576 /****************************************** |
| 577 * Build opAssign for struct. | |
| 578 * S* opAssign(S s) { ... } | |
| 579 */ | |
| 580 FuncDeclaration buildOpAssign(Scope sc) | |
| 581 { | |
| 582 if (!needOpAssign()) | |
| 583 return null; | |
| 584 | |
| 585 //printf("StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 586 | |
| 587 FuncDeclaration fop = null; | |
| 588 | |
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589 auto param = new Parameter(STC.STCnodtor, type, Id.p, null); |
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590 auto fparams = new Parameters; |
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591 fparams.push(param); |
| 0 | 592 Type ftype = new TypeFunction(fparams, handle, false, LINK.LINKd); |
| 593 version (STRUCTTHISREF) { | |
| 594 (cast(TypeFunction)ftype).isref = 1; | |
| 595 } | |
| 596 | |
| 597 fop = new FuncDeclaration(Loc(0), Loc(0), Id.assign, STC.STCundefined, ftype); | |
| 598 | |
| 599 Expression e = null; | |
| 600 if (postblit) | |
| 601 { /* Swap: | |
| 602 * tmp = *this; *this = s; tmp.dtor(); | |
| 603 */ | |
| 604 //printf("\tswap copy\n"); | |
| 605 Identifier idtmp = Lexer.uniqueId("__tmp"); | |
| 606 VarDeclaration tmp; | |
| 607 AssignExp ec = null; | |
| 608 if (dtor) | |
| 609 { | |
| 610 tmp = new VarDeclaration(Loc(0), type, idtmp, new VoidInitializer(Loc(0))); | |
| 611 tmp.noauto = true; | |
| 179 | 612 tmp.storage_class |= STCctfe; |
| 0 | 613 e = new DeclarationExp(Loc(0), tmp); |
| 614 | |
| 615 Expression e2; | |
| 616 version (STRUCTTHISREF) { | |
| 617 e2 = new ThisExp(Loc(0)); | |
| 618 } else { | |
| 619 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 620 } | |
| 621 ec = new AssignExp(Loc(0), new VarExp(Loc(0), tmp), e2); | |
| 622 ec.op = TOK.TOKblit; | |
| 623 e = Expression.combine(e, ec); | |
| 624 } | |
| 625 Expression e2; | |
| 626 version (STRUCTTHISREF) { | |
| 627 e2 = new ThisExp(Loc(0)); | |
| 628 } else { | |
| 629 e2 = new PtrExp(Loc(0), new ThisExp(Loc(0))); | |
| 630 } | |
| 176 | 631 |
| 0 | 632 ec = new AssignExp(Loc(0), e2, new IdentifierExp(Loc(0), Id.p)); |
| 633 ec.op = TOK.TOKblit; | |
| 634 e = Expression.combine(e, ec); | |
| 635 if (dtor) | |
| 636 { | |
| 637 /* Instead of running the destructor on s, run it | |
| 638 * on tmp. This avoids needing to copy tmp back in to s. | |
| 639 */ | |
| 640 Expression ecc = new DotVarExp(Loc(0), new VarExp(Loc(0), tmp), dtor, 0); | |
| 641 ecc = new CallExp(Loc(0), ecc); | |
| 642 e = Expression.combine(e, ecc); | |
| 643 } | |
| 644 } | |
| 645 else | |
| 646 { /* Do memberwise copy | |
| 647 */ | |
| 648 //printf("\tmemberwise copy\n"); | |
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649 foreach (VarDeclaration v; fields) |
| 0 | 650 { |
| 651 assert(v && v.storage_class & STC.STCfield); | |
| 652 // this.v = s.v; | |
| 653 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)); | |
| 654 ec.op = TOK.TOKblit; | |
| 655 e = Expression.combine(e, ec); | |
| 656 } | |
| 657 } | |
| 658 Statement s1 = new ExpStatement(Loc(0), e); | |
| 659 | |
| 660 /* Add: | |
| 661 * return this; | |
| 662 */ | |
| 663 e = new ThisExp(Loc(0)); | |
| 664 Statement s2 = new ReturnStatement(Loc(0), e); | |
| 665 | |
| 666 fop.fbody = new CompoundStatement(Loc(0), s1, s2); | |
| 667 | |
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668 members.push(fop); |
| 13 | 669 fop.addMember(sc, this, true); |
| 0 | 670 |
| 671 sc = sc.push(); | |
| 672 sc.stc = STC.STCundefined; | |
| 673 sc.linkage = LINK.LINKd; | |
| 674 | |
| 675 fop.semantic(sc); | |
| 676 | |
| 677 sc.pop(); | |
| 678 | |
| 679 //printf("-StructDeclaration.buildOpAssign() %s\n", toChars()); | |
| 680 | |
| 681 return fop; | |
| 682 } | |
| 176 | 683 |
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684 /****************************************** |
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685 * Build opEquals for struct. |
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686 * const bool opEquals(const ref S s) { ... } |
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687 */ |
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688 FuncDeclaration buildOpEquals(Scope sc) |
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689 { |
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690 if (!needOpEquals()) |
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691 return null; |
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692 //printf("StructDeclaration::buildOpEquals() %s\n", toChars()); |
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693 Loc loc = this.loc; |
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694 |
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695 auto parameters = new Parameters; |
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696 version (STRUCTTHISREF) { |
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697 // bool opEquals(ref const T) const; |
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698 auto param = new Parameter(STC.STCref, type.constOf(), Id.p, null); |
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699 } else { |
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700 // bool opEquals(const T*) const; |
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701 auto param = new Parameter(STC.STCin, type.pointerTo(), Id.p, null); |
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702 } |
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703 |
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704 parameters.push(param); |
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705 auto ftype = new TypeFunction(parameters, Type.tbool, 0, LINKd); |
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706 ftype.mod = MOD.MODconst; |
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707 ftype = cast(TypeFunction)ftype.semantic(loc, sc); |
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708 |
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709 auto fop = new FuncDeclaration(loc, Loc(0), Id.eq, STC.STCundefined, ftype); |
|
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710 |
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711 Expression e = null; |
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712 /* Do memberwise compare |
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713 */ |
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714 //printf("\tmemberwise compare\n"); |
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715 foreach (s; fields) |
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716 { |
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717 VarDeclaration v = s.isVarDeclaration(); |
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718 assert(v && v.storage_class & STC.STCfield); |
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719 if (v.storage_class & STC.STCref) |
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720 assert(0); // what should we do with this? |
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721 // this.v == s.v; |
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722 auto ec = new EqualExp(TOKequal, loc, |
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723 new DotVarExp(loc, new ThisExp(loc), v, 0), |
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724 new DotVarExp(loc, new IdentifierExp(loc, Id.p), v, 0)); |
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725 if (e) |
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726 e = new AndAndExp(loc, e, ec); |
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727 else |
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728 e = ec; |
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729 } |
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730 if (!e) |
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731 e = new IntegerExp(loc, 1, Type.tbool); |
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732 fop.fbody = new ReturnStatement(loc, e); |
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733 |
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734 members.push(fop); |
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735 fop.addMember(sc, this, 1); |
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736 |
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737 sc = sc.push(); |
| 139 | 738 sc.stc = STCundefined; |
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739 sc.linkage = LINK.LINKd; |
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740 |
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741 fop.semantic(sc); |
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742 |
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743 sc.pop(); |
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744 |
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745 //printf("-StructDeclaration::buildOpEquals() %s\n", toChars()); |
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746 |
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747 return fop; |
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748 } |
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749 |
| 0 | 750 /***************************************** |
| 751 * Create inclusive postblit for struct by aggregating | |
| 752 * all the postblits in postblits[] with the postblits for | |
| 753 * all the members. | |
| 754 * Note the close similarity with AggregateDeclaration.buildDtor(), | |
| 755 * and the ordering changes (runs forward instead of backwards). | |
| 756 */ | |
| 757 | |
| 758 version (DMDV2) { | |
| 759 FuncDeclaration buildPostBlit(Scope sc) | |
| 760 { | |
| 761 //printf("StructDeclaration.buildPostBlit() %s\n", toChars()); | |
| 762 Expression e = null; | |
| 179 | 763 StorageClass stc = STCundefined; |
| 0 | 764 |
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765 foreach (VarDeclaration v; fields) |
| 0 | 766 { |
| 79 | 767 assert(v && v.storage_class & STC.STCfield); |
| 768 if (v.storage_class & STC.STCref) | |
| 769 continue; | |
| 770 Type tv = v.type.toBasetype(); | |
| 771 size_t dim = 1; | |
| 772 while (tv.ty == TY.Tsarray) | |
| 179 | 773 { |
| 774 TypeSArray ta = cast(TypeSArray)tv; | |
| 79 | 775 dim *= (cast(TypeSArray)tv).dim.toInteger(); |
| 776 tv = tv.nextOf().toBasetype(); | |
| 0 | 777 } |
| 79 | 778 if (tv.ty == TY.Tstruct) |
| 179 | 779 { |
| 780 TypeStruct ts = cast(TypeStruct)tv; | |
| 79 | 781 StructDeclaration sd = ts.sym; |
| 782 if (sd.postblit) | |
| 179 | 783 { |
| 784 Expression ex; | |
| 785 | |
| 786 stc |= sd.postblit.storage_class & STCdisable; | |
| 176 | 787 |
| 179 | 788 // this.v |
| 789 ex = new ThisExp(Loc(0)); | |
| 790 ex = new DotVarExp(Loc(0), ex, v, 0); | |
| 176 | 791 |
| 179 | 792 if (dim == 1) |
| 793 { // this.v.postblit() | |
| 794 ex = new DotVarExp(Loc(0), ex, sd.postblit, 0); | |
| 795 ex = new CallExp(Loc(0), ex); | |
| 796 } | |
| 797 else | |
| 798 { | |
| 799 // Typeinfo.postblit(cast(void*)&this.v); | |
| 800 Expression ea = new AddrExp(Loc(0), ex); | |
| 801 ea = new CastExp(Loc(0), ea, Type.tvoid.pointerTo()); | |
| 176 | 802 |
| 179 | 803 Expression et = v.type.getTypeInfo(sc); |
| 804 et = new DotIdExp(Loc(0), et, Id._postblit); | |
| 176 | 805 |
| 179 | 806 ex = new CallExp(Loc(0), et, ea); |
| 807 } | |
| 808 e = Expression.combine(e, ex); // combine in forward order | |
| 79 | 809 } |
| 0 | 810 } |
| 811 } | |
| 812 | |
| 813 /* Build our own "postblit" which executes e | |
| 814 */ | |
| 815 if (e) | |
| 179 | 816 { |
| 817 //printf("Building __fieldPostBlit()\n"); | |
| 818 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__fieldPostBlit")); | |
| 819 dd.storage_class |= stc; | |
| 820 dd.fbody = new ExpStatement(Loc(0), e); | |
| 821 postblits.shift(dd); | |
| 822 members.push(dd); | |
| 823 dd.semantic(sc); | |
| 0 | 824 } |
| 825 | |
| 826 switch (postblits.dim) | |
| 827 { | |
| 828 case 0: | |
| 829 return null; | |
| 830 | |
| 831 case 1: | |
|
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832 return cast(FuncDeclaration)postblits[0]; |
| 0 | 833 |
| 834 default: | |
| 835 e = null; | |
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836 foreach(FuncDeclaration fd; postblits) |
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837 { |
| 179 | 838 Expression ex = new ThisExp(Loc(0)); |
| 839 stc |= fd.storage_class & STCdisable; | |
| 840 ex = new DotVarExp(Loc(0), ex, fd, 0); | |
| 841 ex = new CallExp(Loc(0), ex); | |
| 842 e = Expression.combine(e, ex); | |
| 0 | 843 } |
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844 auto dd = new PostBlitDeclaration(Loc(0), Loc(0), Lexer.idPool("__aggrPostBlit")); |
| 179 | 845 dd.storage_class |= stc; |
| 0 | 846 dd.fbody = new ExpStatement(Loc(0), e); |
|
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847 members.push(dd); |
| 0 | 848 dd.semantic(sc); |
| 849 return dd; | |
| 850 } | |
| 851 } | |
| 852 } | |
| 853 | |
| 854 /******************************************* | |
| 855 * Build copy constructor for struct. | |
| 856 * Copy constructors are compiler generated only, and are only | |
| 857 * callable from the compiler. They are not user accessible. | |
| 858 * A copy constructor is: | |
| 859 * void cpctpr(ref S s) | |
| 860 * { | |
| 861 * *this = s; | |
| 862 * this.postBlit(); | |
| 863 * } | |
| 864 * This is done so: | |
| 865 * - postBlit() never sees uninitialized data | |
| 866 * - memcpy can be much more efficient than memberwise copy | |
| 867 * - no fields are overlooked | |
| 868 */ | |
| 869 FuncDeclaration buildCpCtor(Scope sc) | |
| 870 { | |
| 871 //printf("StructDeclaration.buildCpCtor() %s\n", toChars()); | |
| 872 FuncDeclaration fcp = null; | |
| 873 | |
| 874 /* Copy constructor is only necessary if there is a postblit function, | |
| 875 * otherwise the code generator will just do a bit copy. | |
| 876 */ | |
| 877 if (postblit) | |
| 878 { | |
| 129 | 879 //printf("generating cpctor\n"); |
| 0 | 880 |
|
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881 auto param = new Parameter(STC.STCref, type, Id.p, null); |
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882 auto fparams = new Parameters; |
| 129 | 883 fparams.push(param); |
| 884 Type ftype = new TypeFunction(fparams, Type.tvoid, false, LINK.LINKd); | |
| 0 | 885 |
| 129 | 886 fcp = new FuncDeclaration(Loc(0), Loc(0), Id.cpctor, STC.STCundefined, ftype); |
| 179 | 887 fcp.storage_class |= postblit.storage_class & STCdisable; |
| 0 | 888 |
| 129 | 889 // Build *this = p; |
| 890 Expression e = new ThisExp(Loc(0)); | |
| 0 | 891 version (STRUCTTHISREF) { |
| 892 } else { | |
| 129 | 893 e = new PtrExp(Loc(0), e); |
| 0 | 894 } |
| 129 | 895 AssignExp ea = new AssignExp(Loc(0), e, new IdentifierExp(Loc(0), Id.p)); |
| 896 ea.op = TOK.TOKblit; | |
| 897 Statement s = new ExpStatement(Loc(0), ea); | |
| 0 | 898 |
| 129 | 899 // Build postBlit(); |
| 900 e = new VarExp(Loc(0), postblit, 0); | |
| 901 e = new CallExp(Loc(0), e); | |
| 0 | 902 |
| 129 | 903 s = new CompoundStatement(Loc(0), s, new ExpStatement(Loc(0), e)); |
| 904 fcp.fbody = s; | |
| 0 | 905 |
| 129 | 906 members.push(fcp); |
| 0 | 907 |
| 129 | 908 sc = sc.push(); |
| 909 sc.stc = STC.STCundefined; | |
| 910 sc.linkage = LINK.LINKd; | |
| 0 | 911 |
| 129 | 912 fcp.semantic(sc); |
| 0 | 913 |
| 129 | 914 sc.pop(); |
| 0 | 915 } |
| 916 | |
| 917 return fcp; | |
| 918 } | |
|
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919 } |
| 72 | 920 override void toDocBuffer(OutBuffer buf) |
| 0 | 921 { |
| 922 assert(false); | |
| 923 } | |
| 176 | 924 |
| 72 | 925 override PROT getAccess(Dsymbol smember) // determine access to smember |
| 0 | 926 { |
| 927 assert(false); | |
| 928 } | |
| 929 | |
| 72 | 930 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 931 { |
| 932 //printf("StructDeclaration.toObjFile('%s')\n", toChars()); | |
| 933 | |
| 934 if (multiobj) | |
| 176 | 935 { |
| 0 | 936 obj_append(this); |
| 937 return; | |
| 938 } | |
| 939 | |
| 940 // Anonymous structs/unions only exist as part of others, | |
| 941 // do not output forward referenced structs's | |
| 942 if (!isAnonymous() && members) | |
| 943 { | |
| 944 if (global.params.symdebug) { | |
| 945 toDebug(); | |
| 946 } | |
| 947 | |
| 948 type.getTypeInfo(null); // generate TypeInfo | |
| 949 | |
| 950 if (true) | |
| 951 { | |
| 952 // Generate static initializer | |
| 953 toInitializer(); | |
| 954 | |
| 955 static if (false) { | |
| 956 sinit.Sclass = SC.SCcomdat; | |
| 957 } else { | |
| 958 if (inTemplateInstance()) | |
| 959 { | |
| 960 sinit.Sclass = SC.SCcomdat; | |
| 961 } | |
| 962 else | |
| 963 { | |
| 964 sinit.Sclass = SC.SCglobal; | |
| 965 } | |
| 966 } | |
| 967 sinit.Sfl = FL.FLdata; | |
| 968 | |
| 969 toDt(&sinit.Sdt); | |
| 970 | |
| 95 | 971 version (OMFOBJ) |
| 972 { | |
| 0 | 973 /* For OMF, common blocks aren't pulled in from the library. |
| 974 */ | |
| 975 /* ELF comdef's generate multiple | |
| 976 * definition errors for them from the gnu linker. | |
| 977 * Need to figure out how to generate proper comdef's for ELF. | |
| 978 */ | |
| 979 // See if we can convert a comdat to a comdef, | |
| 980 // which saves on exe file space. | |
| 95 | 981 if (0 && // causes multiple def problems with COMMON in one file and COMDAT in library |
| 982 sinit.Sclass == SCcomdat && | |
| 0 | 983 sinit.Sdt && |
| 984 sinit.Sdt.dt == DT.DT_azeros && | |
| 985 sinit.Sdt.DTnext == null && | |
| 986 !global.params.multiobj) | |
| 987 { | |
| 988 sinit.Sclass = SC.SCglobal; | |
| 989 sinit.Sdt.dt = DT.DT_common; | |
| 990 } | |
| 991 } | |
| 992 | |
| 993 version (ELFOBJ) { | |
| 994 sinit.Sseg = Segment.CDATA; | |
| 995 } | |
| 996 version (MACHOBJ) { | |
| 997 sinit.Sseg = Segment.DATA; | |
| 998 } | |
| 999 outdata(sinit); | |
| 1000 } | |
| 1001 | |
| 1002 // Put out the members | |
|
77
ad4792a1cfd6
more D-ification container accessing
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
74
diff
changeset
|
1003 foreach(Dsymbol member; members) |
| 0 | 1004 member.toObjFile(0); |
| 1005 } | |
| 1006 } | |
| 176 | 1007 |
| 0 | 1008 void toDt(dt_t** pdt) |
| 1009 { | |
| 1010 uint offset; | |
| 1011 dt_t* dt; | |
| 1012 | |
| 1013 //printf("StructDeclaration.toDt(), this='%s'\n", toChars()); | |
| 1014 offset = 0; | |
| 1015 | |
| 1016 // Note equivalence of this loop to class's | |
| 79 | 1017 for (uint i = 0; i < fields.dim; i++) |
| 0 | 1018 { |
| 79 | 1019 VarDeclaration v = cast(VarDeclaration)fields[i]; |
| 0 | 1020 //printf("\tfield '%s' voffset %d, offset = %d\n", v.toChars(), v.offset, offset); |
| 1021 dt = null; | |
| 1022 int sz; | |
| 1023 | |
| 1024 if (v.storage_class & STC.STCref) | |
| 1025 { | |
| 1026 sz = PTRSIZE; | |
| 1027 if (v.offset >= offset) | |
| 1028 dtnzeros(&dt, sz); | |
| 1029 } | |
| 1030 else | |
| 1031 { | |
| 1032 sz = cast(uint)v.type.size(); | |
| 1033 Initializer init = v.init; | |
| 1034 if (init) | |
| 176 | 1035 { |
| 0 | 1036 //printf("\t\thas initializer %s\n", init.toChars()); |
| 1037 ExpInitializer ei = init.isExpInitializer(); | |
| 1038 Type tb = v.type.toBasetype(); | |
| 1039 if (ei && tb.ty == TY.Tsarray) | |
| 1040 (cast(TypeSArray)tb).toDtElem(&dt, ei.exp); | |
| 1041 else | |
| 1042 dt = init.toDt(); | |
| 1043 } | |
| 1044 else if (v.offset >= offset) | |
| 1045 v.type.toDt(&dt); | |
| 1046 } | |
| 1047 if (dt) | |
| 1048 { | |
| 1049 if (v.offset < offset) | |
| 1050 error("overlapping initialization for struct %s.%s", toChars(), v.toChars()); | |
| 1051 else | |
| 1052 { | |
| 1053 if (offset < v.offset) | |
| 1054 dtnzeros(pdt, v.offset - offset); | |
| 1055 dtcat(pdt, dt); | |
| 1056 offset = v.offset + sz; | |
| 1057 } | |
| 1058 } | |
| 1059 } | |
| 1060 | |
| 1061 if (offset < structsize) | |
| 1062 dtnzeros(pdt, structsize - offset); | |
| 1063 | |
| 1064 dt_optimize(*pdt); | |
| 1065 } | |
| 176 | 1066 |
| 0 | 1067 void toDebug() // to symbolic debug info |
| 1068 { | |
| 1069 assert(false); | |
| 1070 } | |
| 1071 | |
| 72 | 1072 override StructDeclaration isStructDeclaration() { return this; } |
| 1073 } |