Mercurial > projects > ddmd
annotate dmd/EnumDeclaration.d @ 138:90821c10b6a7
2.039
| author | Trass3r |
|---|---|
| date | Tue, 14 Sep 2010 00:00:24 +0200 |
| parents | e28b18c23469 |
| children | e3afd1303184 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.EnumDeclaration; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.ScopeDsymbol; |
| 5 import dmd.AddExp; | |
| 6 import dmd.Type; | |
| 7 import dmd.CmpExp; | |
| 8 import dmd.IntegerExp; | |
| 9 import dmd.EqualExp; | |
| 10 import dmd.TOK; | |
| 11 import dmd.Id; | |
| 12 import dmd.TY; | |
| 13 import dmd.DsymbolTable; | |
| 14 import dmd.STC; | |
| 15 import dmd.Expression; | |
| 16 import dmd.Identifier; | |
| 17 import dmd.Dsymbol; | |
| 18 import dmd.Scope; | |
| 19 import dmd.OutBuffer; | |
| 20 import dmd.HdrGenState; | |
| 21 import dmd.Global; | |
| 22 import dmd.Loc; | |
|
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23 import dmd.Module; |
| 0 | 24 import dmd.TypeEnum; |
| 25 import dmd.EnumMember; | |
| 26 import dmd.DYNCAST; | |
| 27 import dmd.WANT; | |
| 28 import dmd.Id; | |
| 79 | 29 import dmd.Json; |
| 0 | 30 import dmd.Lexer; |
| 31 | |
| 32 import dmd.backend.SC; | |
| 33 import dmd.backend.FL; | |
| 34 import dmd.backend.Util; | |
| 35 import dmd.backend.Symbol; | |
| 36 import dmd.backend.Classsym; | |
| 37 import dmd.backend.SFL; | |
| 38 import dmd.backend.LIST; | |
| 39 import dmd.codegen.Util; | |
| 40 | |
| 41 import std.stdio : writef; | |
| 42 | |
| 43 class EnumDeclaration : ScopeDsymbol | |
| 44 { /* enum ident : memtype { ... } | |
| 45 */ | |
| 46 Type type; // the TypeEnum | |
| 47 Type memtype; // type of the members | |
| 48 | |
| 79 | 49 version (DMDV1) |
| 50 { | |
| 0 | 51 ulong maxval; |
| 52 ulong minval; | |
| 53 ulong defaultval; // default initializer | |
| 79 | 54 } |
| 55 else | |
| 56 { | |
| 0 | 57 Expression maxval; |
| 58 Expression minval; | |
| 59 Expression defaultval; // default initializer | |
| 60 } | |
| 138 | 61 bool isdeprecated = false; |
| 62 bool isdone = false; // 0: not done | |
| 63 // 1: semantic() successfully completed | |
| 64 | |
| 0 | 65 this(Loc loc, Identifier id, Type memtype) |
| 66 { | |
| 67 super(id); | |
| 68 this.loc = loc; | |
| 69 type = new TypeEnum(this); | |
| 70 this.memtype = memtype; | |
| 71 } | |
| 72 | |
| 72 | 73 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 74 { |
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75 Type t = null; |
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76 if (memtype) |
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77 t = memtype.syntaxCopy(); |
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78 |
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79 EnumDeclaration ed; |
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80 if (s) |
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81 { ed = cast(EnumDeclaration)s; |
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82 ed.memtype = t; |
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83 } |
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84 else |
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85 ed = new EnumDeclaration(loc, ident, t); |
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86 ScopeDsymbol.syntaxCopy(ed); |
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87 return ed; |
| 0 | 88 } |
| 89 | |
| 72 | 90 override void semantic(Scope sc) |
| 0 | 91 { |
| 92 Type t; | |
| 93 Scope sce; | |
| 94 | |
| 95 //writef("EnumDeclaration.semantic(sd = %p, '%s') %s\n", sc.scopesym, sc.scopesym.toChars(), toChars()); | |
| 96 //writef("EnumDeclaration.semantic() %s\n", toChars()); | |
| 97 if (!members) // enum ident; | |
| 98 return; | |
| 99 | |
| 100 if (!memtype && !isAnonymous()) | |
| 101 { | |
| 102 // Set memtype if we can to reduce fwd reference errors | |
| 103 memtype = Type.tint32; // case 1) enum ident { ... } | |
| 104 } | |
| 105 | |
| 106 if (symtab) // if already done | |
| 107 { | |
| 138 | 108 if (isdone || !scope_) |
| 0 | 109 return; // semantic() already completed |
| 110 } | |
| 111 else | |
| 112 symtab = new DsymbolTable(); | |
| 113 | |
| 114 Scope scx = null; | |
| 115 if (scope_) | |
| 116 { sc = scope_; | |
| 117 scx = scope_; // save so we don't make redundant copies | |
| 118 scope_ = null; | |
| 119 } | |
| 120 | |
| 121 if (sc.stc & STC.STCdeprecated) | |
| 122 isdeprecated = true; | |
| 123 | |
| 124 parent = sc.parent; | |
| 125 | |
| 126 /* The separate, and distinct, cases are: | |
| 127 * 1. enum { ... } | |
| 128 * 2. enum : memtype { ... } | |
| 129 * 3. enum ident { ... } | |
| 130 * 4. enum ident : memtype { ... } | |
| 131 */ | |
| 132 | |
| 133 if (memtype) | |
| 134 { | |
| 135 memtype = memtype.semantic(loc, sc); | |
| 136 | |
| 137 /* Check to see if memtype is forward referenced | |
| 138 */ | |
| 139 if (memtype.ty == TY.Tenum) | |
| 140 { EnumDeclaration sym = cast(EnumDeclaration)memtype.toDsymbol(sc); | |
| 141 if (!sym.memtype || !sym.members || !sym.symtab || sym.scope_) | |
| 142 { | |
| 143 // memtype is forward referenced, so try again later | |
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144 scope_ = scx ? scx : sc.clone(); |
| 0 | 145 scope_.setNoFree(); |
| 146 scope_.module_.addDeferredSemantic(this); | |
| 147 writef("\tdeferring %s\n", toChars()); | |
| 148 return; | |
| 149 } | |
| 150 } | |
| 138 | 151 static if (false) |
| 152 { | |
| 0 | 153 // Decided to abandon this restriction for D 2.0 |
| 154 if (!memtype.isintegral()) | |
| 155 { error("base type must be of integral type, not %s", memtype.toChars()); | |
| 156 memtype = Type.tint32; | |
| 157 } | |
| 158 } | |
| 159 } | |
| 160 | |
| 138 | 161 isdone = true; |
| 162 | |
| 0 | 163 type = type.semantic(loc, sc); |
| 164 if (isAnonymous()) | |
| 165 sce = sc; | |
| 166 else | |
| 167 { sce = sc.push(this); | |
| 168 sce.parent = this; | |
| 169 } | |
| 170 if (members.dim == 0) | |
| 171 error("enum %s must have at least one member", toChars()); | |
| 172 int first = 1; | |
| 173 Expression elast = null; | |
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174 foreach (Dsymbol s; members) |
| 0 | 175 { |
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176 EnumMember em = s.isEnumMember(); |
| 0 | 177 Expression e; |
| 178 | |
| 179 if (!em) | |
| 180 /* The e.semantic(sce) can insert other symbols, such as | |
| 181 * template instances and function literals. | |
| 182 */ | |
| 183 continue; | |
| 184 | |
| 185 //printf(" Enum member '%s'\n",em.toChars()); | |
| 186 if (em.type) | |
| 187 em.type = em.type.semantic(em.loc, sce); | |
| 188 e = em.value; | |
| 189 if (e) | |
| 190 { | |
| 191 assert(e.dyncast() == DYNCAST.DYNCAST_EXPRESSION); | |
| 192 e = e.semantic(sce); | |
| 193 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 194 if (memtype) | |
| 195 { | |
| 196 e = e.implicitCastTo(sce, memtype); | |
| 197 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 198 if (!isAnonymous()) | |
| 199 e = e.castTo(sce, type); | |
| 200 t = memtype; | |
| 201 } | |
| 202 else if (em.type) | |
| 203 { | |
| 204 e = e.implicitCastTo(sce, em.type); | |
| 205 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 206 assert(isAnonymous()); | |
| 207 t = e.type; | |
| 208 } | |
| 209 else | |
| 210 t = e.type; | |
| 211 } | |
| 212 else if (first) | |
| 213 { | |
| 214 if (memtype) | |
| 215 t = memtype; | |
| 216 else if (em.type) | |
| 217 t = em.type; | |
| 218 else | |
| 219 t = Type.tint32; | |
| 220 e = new IntegerExp(em.loc, 0, Type.tint32); | |
| 221 e = e.implicitCastTo(sce, t); | |
| 222 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 223 if (!isAnonymous()) | |
| 224 e = e.castTo(sce, type); | |
| 225 } | |
| 226 else | |
| 227 { | |
| 228 // Set value to (elast + 1). | |
| 229 // But first check that (elast != t.max) | |
| 230 assert(elast); | |
| 231 e = new EqualExp(TOK.TOKequal, em.loc, elast, t.getProperty(Loc(0), Id.max)); | |
| 232 e = e.semantic(sce); | |
| 233 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 234 if (e.toInteger()) | |
| 235 error("overflow of enum value %s", elast.toChars()); | |
| 236 | |
| 237 // Now set e to (elast + 1) | |
| 238 e = new AddExp(em.loc, elast, new IntegerExp(em.loc, 1, Type.tint32)); | |
| 239 e = e.semantic(sce); | |
| 240 e = e.castTo(sce, elast.type); | |
| 241 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 242 } | |
| 243 elast = e; | |
| 244 em.value = e; | |
| 245 | |
| 246 // Add to symbol table only after evaluating 'value' | |
| 247 if (isAnonymous()) | |
| 248 { | |
| 249 /* Anonymous enum members get added to enclosing scope. | |
| 250 */ | |
| 251 for (Scope scxx = sce; scxx; scxx = scxx.enclosing) | |
| 252 { | |
| 253 if (scxx.scopesym) | |
| 254 { | |
| 255 if (!scxx.scopesym.symtab) | |
| 256 scxx.scopesym.symtab = new DsymbolTable(); | |
| 13 | 257 em.addMember(sce, scxx.scopesym, true); |
| 0 | 258 break; |
| 259 } | |
| 260 } | |
| 261 } | |
| 262 else | |
| 13 | 263 em.addMember(sc, this, true); |
| 0 | 264 |
| 265 /* Compute .min, .max and .default values. | |
| 266 * If enum doesn't have a name, we can never identify the enum type, | |
| 267 * so there is no purpose for a .min, .max or .default | |
| 268 */ | |
| 269 if (!isAnonymous()) | |
| 270 { | |
| 271 if (first) | |
| 272 { defaultval = e; | |
| 273 minval = e; | |
| 274 maxval = e; | |
| 275 } | |
| 276 else | |
| 277 { Expression ec; | |
| 278 | |
| 279 /* In order to work successfully with UDTs, | |
| 280 * build expressions to do the comparisons, | |
| 281 * and let the semantic analyzer and constant | |
| 282 * folder give us the result. | |
| 283 */ | |
| 284 | |
| 285 // Compute if(e < minval) | |
| 286 ec = new CmpExp(TOK.TOKlt, em.loc, e, minval); | |
| 287 ec = ec.semantic(sce); | |
| 288 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 289 if (ec.toInteger()) | |
| 290 minval = e; | |
| 291 | |
| 292 ec = new CmpExp(TOK.TOKgt, em.loc, e, maxval); | |
| 293 ec = ec.semantic(sce); | |
| 294 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 295 if (ec.toInteger()) | |
| 296 maxval = e; | |
| 297 } | |
| 298 } | |
| 299 first = 0; | |
| 300 } | |
| 301 //printf("defaultval = %lld\n", defaultval); | |
| 302 | |
| 303 //if (defaultval) printf("defaultval: %s %s\n", defaultval.toChars(), defaultval.type.toChars()); | |
| 304 if (sc != sce) | |
| 305 sce.pop(); | |
| 306 //members.print(); | |
| 307 } | |
| 308 | |
| 72 | 309 override bool oneMember(Dsymbol* ps) |
| 0 | 310 { |
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311 if (isAnonymous()) |
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312 return Dsymbol.oneMembers(members, ps); |
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313 return Dsymbol.oneMember(ps); |
| 0 | 314 } |
| 315 | |
| 72 | 316 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 317 { |
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318 buf.writestring("enum "); |
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319 if (ident) |
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320 { buf.writestring(ident.toChars()); |
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321 buf.writeByte(' '); |
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322 } |
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323 if (memtype) |
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324 { |
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325 buf.writestring(": "); |
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326 memtype.toCBuffer(buf, null, hgs); |
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327 } |
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328 if (!members) |
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329 { |
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330 buf.writeByte(';'); |
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331 buf.writenl(); |
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332 return; |
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333 } |
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334 buf.writenl(); |
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335 buf.writeByte('{'); |
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336 buf.writenl(); |
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337 foreach(Dsymbol s; members) |
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338 { |
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339 EnumMember em = s.isEnumMember(); |
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340 if (!em) |
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341 continue; |
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342 //buf.writestring(" "); |
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343 em.toCBuffer(buf, hgs); |
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344 buf.writeByte(','); |
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345 buf.writenl(); |
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346 } |
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347 buf.writeByte('}'); |
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348 buf.writenl(); |
| 0 | 349 } |
| 350 | |
| 72 | 351 override Type getType() |
| 0 | 352 { |
| 353 return type; | |
| 354 } | |
| 355 | |
| 72 | 356 override string kind() |
| 0 | 357 { |
| 358 return "enum"; | |
| 359 } | |
| 360 | |
| 361 version (DMDV2) { | |
| 72 | 362 override Dsymbol search(Loc, Identifier ident, int flags) |
| 0 | 363 { |
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364 //printf("%s.EnumDeclaration.search('%s')\n", toChars(), ident.toChars()); |
| 0 | 365 if (scope_) |
| 366 // Try one last time to resolve this enum | |
| 367 semantic(scope_); | |
| 368 | |
| 369 if (!members || !symtab || scope_) | |
| 370 { | |
| 371 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 372 //*(char*)0=0; | |
| 373 return null; | |
| 374 } | |
| 375 | |
| 376 return ScopeDsymbol.search(loc, ident, flags); | |
| 377 } | |
| 378 } | |
| 72 | 379 override bool isDeprecated() // is Dsymbol deprecated? |
| 0 | 380 { |
| 381 return isdeprecated; | |
| 382 } | |
| 383 | |
| 72 | 384 override void emitComment(Scope sc) |
| 0 | 385 { |
| 386 assert(false); | |
| 387 } | |
| 79 | 388 |
| 389 override void toJsonBuffer(OutBuffer buf) | |
| 390 { | |
| 391 //writef("EnumDeclaration.toJsonBuffer()\n"); | |
| 392 if (isAnonymous()) | |
| 393 { | |
| 394 if (members) | |
| 395 { | |
| 396 foreach (Dsymbol s; members) | |
| 397 { | |
| 398 s.toJsonBuffer(buf); | |
| 399 buf.writestring(",\n"); | |
| 400 } | |
| 401 JsonRemoveComma(buf); | |
| 402 } | |
| 403 return; | |
| 404 } | |
| 0 | 405 |
| 79 | 406 buf.writestring("{\n"); |
| 407 | |
| 408 JsonProperty(buf, Pname, toChars()); | |
| 409 JsonProperty(buf, Pkind, kind()); | |
| 410 if (comment) | |
| 411 JsonProperty(buf, Pcomment, comment); | |
| 412 | |
| 413 if (loc.linnum) | |
| 414 JsonProperty(buf, Pline, loc.linnum); | |
| 415 | |
| 416 if (memtype) | |
| 417 JsonProperty(buf, "base", memtype.toChars()); | |
| 418 | |
| 419 JsonString(buf, Pmembers); | |
| 420 buf.writestring(" : [\n"); | |
| 421 size_t offset = buf.offset; | |
| 422 foreach (Dsymbol s; members) | |
| 423 { | |
| 424 if (offset != buf.offset) | |
| 425 { | |
| 96 | 426 buf.writestring(",\n"); |
| 79 | 427 offset = buf.offset; |
| 428 } | |
| 429 s.toJsonBuffer(buf); | |
| 430 } | |
| 96 | 431 JsonRemoveComma(buf); |
| 79 | 432 buf.writestring("]\n"); |
| 433 | |
| 434 buf.writestring("}\n"); | |
| 435 } | |
| 436 | |
| 72 | 437 override void toDocBuffer(OutBuffer buf) |
| 0 | 438 { |
| 439 assert(false); | |
| 440 } | |
| 441 | |
| 72 | 442 override EnumDeclaration isEnumDeclaration() { return this; } |
| 0 | 443 |
| 72 | 444 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 445 { |
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446 //printf("EnumDeclaration.toObjFile('%s')\n", toChars()); |
| 0 | 447 version (DMDV2) { |
| 448 if (isAnonymous()) | |
| 449 return; | |
| 450 } | |
| 451 | |
| 452 if (global.params.symdebug) | |
| 453 toDebug(); | |
| 454 | |
| 455 type.getTypeInfo(null); // generate TypeInfo | |
| 456 | |
| 457 TypeEnum tc = cast(TypeEnum)type; | |
| 458 if (!tc.sym.defaultval || type.isZeroInit(Loc(0))) { | |
| 459 ; | |
| 460 } else { | |
| 461 SC scclass = SCglobal; | |
| 462 if (inTemplateInstance()) | |
| 463 scclass = SCcomdat; | |
| 464 | |
| 465 // Generate static initializer | |
| 466 toInitializer(); | |
| 467 sinit.Sclass = scclass; | |
| 468 sinit.Sfl = FLdata; | |
| 469 version (ELFOBJ) { // Burton | |
| 470 sinit.Sseg = Segment.CDATA; | |
| 471 } | |
| 472 version (MACHOBJ) { | |
| 473 sinit.Sseg = Segment.DATA; | |
| 474 } | |
| 475 version (DMDV1) { | |
| 476 dtnbytes(&sinit.Sdt, tc.size(0), cast(char*)&tc.sym.defaultval); | |
|
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parents:
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diff
changeset
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477 //sinit.Sdt = tc.sym.init.toDt(); |
| 0 | 478 } |
| 479 version (DMDV2) { | |
| 480 tc.sym.defaultval.toDt(&sinit.Sdt); | |
| 481 } | |
| 482 outdata(sinit); | |
| 483 } | |
| 484 } | |
| 485 | |
| 486 void toDebug() | |
| 487 { | |
| 488 assert(false); | |
| 489 } | |
| 490 | |
| 72 | 491 override int cvMember(ubyte* p) |
| 0 | 492 { |
| 493 assert(false); | |
| 494 } | |
| 495 | |
| 496 Symbol* sinit; | |
| 497 | |
| 498 Symbol* toInitializer() | |
| 499 { | |
| 500 Symbol* s; | |
| 501 Classsym* stag; | |
| 502 | |
| 503 if (!sinit) | |
| 504 { | |
| 505 stag = fake_classsym(Id.ClassInfo); | |
| 506 Identifier ident_save = ident; | |
| 507 if (!ident) | |
| 508 ident = Lexer.uniqueId("__enum"); | |
| 509 s = toSymbolX("__init", SCextern, stag.Stype, "Z"); | |
| 510 ident = ident_save; | |
| 511 s.Sfl = FLextern; | |
| 512 s.Sflags |= SFLnodebug; | |
| 513 slist_add(s); | |
| 514 sinit = s; | |
| 515 } | |
| 516 | |
| 517 return sinit; | |
| 518 } | |
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Robert Clipsham <robert@octarineparrot.com>
parents:
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diff
changeset
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519 }; |