Mercurial > projects > ddmd
annotate dmd/EnumDeclaration.d @ 77:ad4792a1cfd6
more D-ification container accessing
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Sun, 29 Aug 2010 14:36:55 +0100 |
| parents | 2e2a5c3f943a |
| children | 43073c7c7769 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.EnumDeclaration; |
| 2 | |
| 3 import dmd.ScopeDsymbol; | |
| 4 import dmd.AddExp; | |
| 5 import dmd.Type; | |
| 6 import dmd.CmpExp; | |
| 7 import dmd.IntegerExp; | |
| 8 import dmd.EqualExp; | |
| 9 import dmd.TOK; | |
| 10 import dmd.Id; | |
| 11 import dmd.TY; | |
| 12 import dmd.DsymbolTable; | |
| 13 import dmd.STC; | |
| 14 import dmd.Expression; | |
| 15 import dmd.Identifier; | |
| 16 import dmd.Dsymbol; | |
| 17 import dmd.Scope; | |
| 18 import dmd.OutBuffer; | |
| 19 import dmd.HdrGenState; | |
| 20 import dmd.Global; | |
| 21 import dmd.Loc; | |
|
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22 import dmd.Module; |
| 0 | 23 import dmd.TypeEnum; |
| 24 import dmd.EnumMember; | |
| 25 import dmd.DYNCAST; | |
| 26 import dmd.WANT; | |
| 27 import dmd.Id; | |
| 28 import dmd.Lexer; | |
| 29 | |
| 30 import dmd.backend.SC; | |
| 31 import dmd.backend.FL; | |
| 32 import dmd.backend.Util; | |
| 33 import dmd.backend.Symbol; | |
| 34 import dmd.backend.Classsym; | |
| 35 import dmd.backend.SFL; | |
| 36 import dmd.backend.LIST; | |
| 37 import dmd.codegen.Util; | |
| 38 | |
| 39 import std.stdio : writef; | |
| 40 | |
| 41 class EnumDeclaration : ScopeDsymbol | |
| 42 { /* enum ident : memtype { ... } | |
| 43 */ | |
| 44 Type type; // the TypeEnum | |
| 45 Type memtype; // type of the members | |
| 46 | |
| 47 version (DMDV1) { | |
| 48 ulong maxval; | |
| 49 ulong minval; | |
| 50 ulong defaultval; // default initializer | |
| 51 } else { | |
| 52 Expression maxval; | |
| 53 Expression minval; | |
| 54 Expression defaultval; // default initializer | |
| 55 } | |
| 56 bool isdeprecated; | |
| 57 | |
| 58 this(Loc loc, Identifier id, Type memtype) | |
| 59 { | |
| 60 super(id); | |
| 61 this.loc = loc; | |
| 62 type = new TypeEnum(this); | |
| 63 this.memtype = memtype; | |
| 64 } | |
| 65 | |
| 72 | 66 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 67 { |
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68 Type t = null; |
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69 if (memtype) |
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70 t = memtype.syntaxCopy(); |
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71 |
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72 EnumDeclaration ed; |
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73 if (s) |
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74 { ed = cast(EnumDeclaration)s; |
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75 ed.memtype = t; |
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76 } |
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77 else |
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78 ed = new EnumDeclaration(loc, ident, t); |
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79 ScopeDsymbol.syntaxCopy(ed); |
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80 return ed; |
| 0 | 81 } |
| 82 | |
| 72 | 83 override void semantic(Scope sc) |
| 0 | 84 { |
| 85 Type t; | |
| 86 Scope sce; | |
| 87 | |
| 88 //writef("EnumDeclaration.semantic(sd = %p, '%s') %s\n", sc.scopesym, sc.scopesym.toChars(), toChars()); | |
| 89 //writef("EnumDeclaration.semantic() %s\n", toChars()); | |
| 90 if (!members) // enum ident; | |
| 91 return; | |
| 92 | |
| 93 if (!memtype && !isAnonymous()) | |
| 94 { | |
| 95 // Set memtype if we can to reduce fwd reference errors | |
| 96 memtype = Type.tint32; // case 1) enum ident { ... } | |
| 97 } | |
| 98 | |
| 99 if (symtab) // if already done | |
| 100 { | |
| 101 if (!scope_) | |
| 102 return; // semantic() already completed | |
| 103 } | |
| 104 else | |
| 105 symtab = new DsymbolTable(); | |
| 106 | |
| 107 Scope scx = null; | |
| 108 if (scope_) | |
| 109 { sc = scope_; | |
| 110 scx = scope_; // save so we don't make redundant copies | |
| 111 scope_ = null; | |
| 112 } | |
| 113 | |
| 114 if (sc.stc & STC.STCdeprecated) | |
| 115 isdeprecated = true; | |
| 116 | |
| 117 parent = sc.parent; | |
| 118 | |
| 119 /* The separate, and distinct, cases are: | |
| 120 * 1. enum { ... } | |
| 121 * 2. enum : memtype { ... } | |
| 122 * 3. enum ident { ... } | |
| 123 * 4. enum ident : memtype { ... } | |
| 124 */ | |
| 125 | |
| 126 if (memtype) | |
| 127 { | |
| 128 memtype = memtype.semantic(loc, sc); | |
| 129 | |
| 130 /* Check to see if memtype is forward referenced | |
| 131 */ | |
| 132 if (memtype.ty == TY.Tenum) | |
| 133 { EnumDeclaration sym = cast(EnumDeclaration)memtype.toDsymbol(sc); | |
| 134 if (!sym.memtype || !sym.members || !sym.symtab || sym.scope_) | |
| 135 { | |
| 136 // memtype is forward referenced, so try again later | |
| 137 scope_ = scx ? scx : new Scope(sc); | |
| 138 scope_.setNoFree(); | |
| 139 scope_.module_.addDeferredSemantic(this); | |
| 140 writef("\tdeferring %s\n", toChars()); | |
| 141 return; | |
| 142 } | |
| 143 } | |
| 144 static if (false) { | |
| 145 // Decided to abandon this restriction for D 2.0 | |
| 146 if (!memtype.isintegral()) | |
| 147 { error("base type must be of integral type, not %s", memtype.toChars()); | |
| 148 memtype = Type.tint32; | |
| 149 } | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 type = type.semantic(loc, sc); | |
| 154 if (isAnonymous()) | |
| 155 sce = sc; | |
| 156 else | |
| 157 { sce = sc.push(this); | |
| 158 sce.parent = this; | |
| 159 } | |
| 160 if (members.dim == 0) | |
| 161 error("enum %s must have at least one member", toChars()); | |
| 162 int first = 1; | |
| 163 Expression elast = null; | |
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164 foreach (Dsymbol s; members) |
| 0 | 165 { |
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166 EnumMember em = s.isEnumMember(); |
| 0 | 167 Expression e; |
| 168 | |
| 169 if (!em) | |
| 170 /* The e.semantic(sce) can insert other symbols, such as | |
| 171 * template instances and function literals. | |
| 172 */ | |
| 173 continue; | |
| 174 | |
| 175 //printf(" Enum member '%s'\n",em.toChars()); | |
| 176 if (em.type) | |
| 177 em.type = em.type.semantic(em.loc, sce); | |
| 178 e = em.value; | |
| 179 if (e) | |
| 180 { | |
| 181 assert(e.dyncast() == DYNCAST.DYNCAST_EXPRESSION); | |
| 182 e = e.semantic(sce); | |
| 183 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 184 if (memtype) | |
| 185 { | |
| 186 e = e.implicitCastTo(sce, memtype); | |
| 187 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 188 if (!isAnonymous()) | |
| 189 e = e.castTo(sce, type); | |
| 190 t = memtype; | |
| 191 } | |
| 192 else if (em.type) | |
| 193 { | |
| 194 e = e.implicitCastTo(sce, em.type); | |
| 195 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 196 assert(isAnonymous()); | |
| 197 t = e.type; | |
| 198 } | |
| 199 else | |
| 200 t = e.type; | |
| 201 } | |
| 202 else if (first) | |
| 203 { | |
| 204 if (memtype) | |
| 205 t = memtype; | |
| 206 else if (em.type) | |
| 207 t = em.type; | |
| 208 else | |
| 209 t = Type.tint32; | |
| 210 e = new IntegerExp(em.loc, 0, Type.tint32); | |
| 211 e = e.implicitCastTo(sce, t); | |
| 212 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 213 if (!isAnonymous()) | |
| 214 e = e.castTo(sce, type); | |
| 215 } | |
| 216 else | |
| 217 { | |
| 218 // Set value to (elast + 1). | |
| 219 // But first check that (elast != t.max) | |
| 220 assert(elast); | |
| 221 e = new EqualExp(TOK.TOKequal, em.loc, elast, t.getProperty(Loc(0), Id.max)); | |
| 222 e = e.semantic(sce); | |
| 223 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 224 if (e.toInteger()) | |
| 225 error("overflow of enum value %s", elast.toChars()); | |
| 226 | |
| 227 // Now set e to (elast + 1) | |
| 228 e = new AddExp(em.loc, elast, new IntegerExp(em.loc, 1, Type.tint32)); | |
| 229 e = e.semantic(sce); | |
| 230 e = e.castTo(sce, elast.type); | |
| 231 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 232 } | |
| 233 elast = e; | |
| 234 em.value = e; | |
| 235 | |
| 236 // Add to symbol table only after evaluating 'value' | |
| 237 if (isAnonymous()) | |
| 238 { | |
| 239 /* Anonymous enum members get added to enclosing scope. | |
| 240 */ | |
| 241 for (Scope scxx = sce; scxx; scxx = scxx.enclosing) | |
| 242 { | |
| 243 if (scxx.scopesym) | |
| 244 { | |
| 245 if (!scxx.scopesym.symtab) | |
| 246 scxx.scopesym.symtab = new DsymbolTable(); | |
| 13 | 247 em.addMember(sce, scxx.scopesym, true); |
| 0 | 248 break; |
| 249 } | |
| 250 } | |
| 251 } | |
| 252 else | |
| 13 | 253 em.addMember(sc, this, true); |
| 0 | 254 |
| 255 /* Compute .min, .max and .default values. | |
| 256 * If enum doesn't have a name, we can never identify the enum type, | |
| 257 * so there is no purpose for a .min, .max or .default | |
| 258 */ | |
| 259 if (!isAnonymous()) | |
| 260 { | |
| 261 if (first) | |
| 262 { defaultval = e; | |
| 263 minval = e; | |
| 264 maxval = e; | |
| 265 } | |
| 266 else | |
| 267 { Expression ec; | |
| 268 | |
| 269 /* In order to work successfully with UDTs, | |
| 270 * build expressions to do the comparisons, | |
| 271 * and let the semantic analyzer and constant | |
| 272 * folder give us the result. | |
| 273 */ | |
| 274 | |
| 275 // Compute if(e < minval) | |
| 276 ec = new CmpExp(TOK.TOKlt, em.loc, e, minval); | |
| 277 ec = ec.semantic(sce); | |
| 278 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 279 if (ec.toInteger()) | |
| 280 minval = e; | |
| 281 | |
| 282 ec = new CmpExp(TOK.TOKgt, em.loc, e, maxval); | |
| 283 ec = ec.semantic(sce); | |
| 284 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 285 if (ec.toInteger()) | |
| 286 maxval = e; | |
| 287 } | |
| 288 } | |
| 289 first = 0; | |
| 290 } | |
| 291 //printf("defaultval = %lld\n", defaultval); | |
| 292 | |
| 293 //if (defaultval) printf("defaultval: %s %s\n", defaultval.toChars(), defaultval.type.toChars()); | |
| 294 if (sc != sce) | |
| 295 sce.pop(); | |
| 296 //members.print(); | |
| 297 } | |
| 298 | |
| 72 | 299 override bool oneMember(Dsymbol* ps) |
| 0 | 300 { |
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301 if (isAnonymous()) |
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302 return Dsymbol.oneMembers(members, ps); |
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303 return Dsymbol.oneMember(ps); |
| 0 | 304 } |
| 305 | |
| 72 | 306 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 307 { |
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308 int i; |
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309 |
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310 buf.writestring("enum "); |
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311 if (ident) |
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312 { buf.writestring(ident.toChars()); |
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313 buf.writeByte(' '); |
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314 } |
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315 if (memtype) |
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316 { |
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317 buf.writestring(": "); |
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318 memtype.toCBuffer(buf, null, hgs); |
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319 } |
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320 if (!members) |
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321 { |
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322 buf.writeByte(';'); |
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323 buf.writenl(); |
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324 return; |
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325 } |
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326 buf.writenl(); |
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327 buf.writeByte('{'); |
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328 buf.writenl(); |
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329 foreach(Dsymbol s; members) |
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330 { |
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331 EnumMember em = s.isEnumMember(); |
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332 if (!em) |
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333 continue; |
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334 //buf.writestring(" "); |
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335 em.toCBuffer(buf, hgs); |
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336 buf.writeByte(','); |
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337 buf.writenl(); |
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338 } |
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339 buf.writeByte('}'); |
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340 buf.writenl(); |
| 0 | 341 } |
| 342 | |
| 72 | 343 override Type getType() |
| 0 | 344 { |
| 345 return type; | |
| 346 } | |
| 347 | |
| 72 | 348 override string kind() |
| 0 | 349 { |
| 350 return "enum"; | |
| 351 } | |
| 352 | |
| 353 version (DMDV2) { | |
| 72 | 354 override Dsymbol search(Loc, Identifier ident, int flags) |
| 0 | 355 { |
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356 //printf("%s.EnumDeclaration.search('%s')\n", toChars(), ident.toChars()); |
| 0 | 357 if (scope_) |
| 358 // Try one last time to resolve this enum | |
| 359 semantic(scope_); | |
| 360 | |
| 361 if (!members || !symtab || scope_) | |
| 362 { | |
| 363 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 364 //*(char*)0=0; | |
| 365 return null; | |
| 366 } | |
| 367 | |
| 368 return ScopeDsymbol.search(loc, ident, flags); | |
| 369 } | |
| 370 } | |
| 72 | 371 override bool isDeprecated() // is Dsymbol deprecated? |
| 0 | 372 { |
| 373 return isdeprecated; | |
| 374 } | |
| 375 | |
| 72 | 376 override void emitComment(Scope sc) |
| 0 | 377 { |
| 378 assert(false); | |
| 379 } | |
| 380 | |
| 72 | 381 override void toDocBuffer(OutBuffer buf) |
| 0 | 382 { |
| 383 assert(false); | |
| 384 } | |
| 385 | |
| 72 | 386 override EnumDeclaration isEnumDeclaration() { return this; } |
| 0 | 387 |
| 72 | 388 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 389 { |
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390 //printf("EnumDeclaration.toObjFile('%s')\n", toChars()); |
| 0 | 391 version (DMDV2) { |
| 392 if (isAnonymous()) | |
| 393 return; | |
| 394 } | |
| 395 | |
| 396 if (global.params.symdebug) | |
| 397 toDebug(); | |
| 398 | |
| 399 type.getTypeInfo(null); // generate TypeInfo | |
| 400 | |
| 401 TypeEnum tc = cast(TypeEnum)type; | |
| 402 if (!tc.sym.defaultval || type.isZeroInit(Loc(0))) { | |
| 403 ; | |
| 404 } else { | |
| 405 SC scclass = SCglobal; | |
| 406 if (inTemplateInstance()) | |
| 407 scclass = SCcomdat; | |
| 408 | |
| 409 // Generate static initializer | |
| 410 toInitializer(); | |
| 411 sinit.Sclass = scclass; | |
| 412 sinit.Sfl = FLdata; | |
| 413 version (ELFOBJ) { // Burton | |
| 414 sinit.Sseg = Segment.CDATA; | |
| 415 } | |
| 416 version (MACHOBJ) { | |
| 417 sinit.Sseg = Segment.DATA; | |
| 418 } | |
| 419 version (DMDV1) { | |
| 420 dtnbytes(&sinit.Sdt, tc.size(0), cast(char*)&tc.sym.defaultval); | |
|
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1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
421 //sinit.Sdt = tc.sym.init.toDt(); |
| 0 | 422 } |
| 423 version (DMDV2) { | |
| 424 tc.sym.defaultval.toDt(&sinit.Sdt); | |
| 425 } | |
| 426 outdata(sinit); | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 void toDebug() | |
| 431 { | |
| 432 assert(false); | |
| 433 } | |
| 434 | |
| 72 | 435 override int cvMember(ubyte* p) |
| 0 | 436 { |
| 437 assert(false); | |
| 438 } | |
| 439 | |
| 440 Symbol* sinit; | |
| 441 | |
| 442 Symbol* toInitializer() | |
| 443 { | |
| 444 Symbol* s; | |
| 445 Classsym* stag; | |
| 446 | |
| 447 if (!sinit) | |
| 448 { | |
| 449 stag = fake_classsym(Id.ClassInfo); | |
| 450 Identifier ident_save = ident; | |
| 451 if (!ident) | |
| 452 ident = Lexer.uniqueId("__enum"); | |
| 453 s = toSymbolX("__init", SCextern, stag.Stype, "Z"); | |
| 454 ident = ident_save; | |
| 455 s.Sfl = FLextern; | |
| 456 s.Sflags |= SFLnodebug; | |
| 457 slist_add(s); | |
| 458 sinit = s; | |
| 459 } | |
| 460 | |
| 461 return sinit; | |
| 462 } | |
|
20
1628b221808d
Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
463 }; |