Mercurial > projects > ddmd
annotate dmd/EnumDeclaration.d @ 89:37b95c347975
Fixed an obscure bug with i variable being reused
| author | korDen |
|---|---|
| date | Mon, 30 Aug 2010 23:25:50 +0400 |
| parents | b17640f0e4e8 |
| children | acd69f84627e |
| 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; | |
| 79 | 28 import dmd.Json; |
| 0 | 29 import dmd.Lexer; |
| 30 | |
| 31 import dmd.backend.SC; | |
| 32 import dmd.backend.FL; | |
| 33 import dmd.backend.Util; | |
| 34 import dmd.backend.Symbol; | |
| 35 import dmd.backend.Classsym; | |
| 36 import dmd.backend.SFL; | |
| 37 import dmd.backend.LIST; | |
| 38 import dmd.codegen.Util; | |
| 39 | |
| 40 import std.stdio : writef; | |
| 41 | |
| 42 class EnumDeclaration : ScopeDsymbol | |
| 43 { /* enum ident : memtype { ... } | |
| 44 */ | |
| 45 Type type; // the TypeEnum | |
| 46 Type memtype; // type of the members | |
| 47 | |
| 79 | 48 version (DMDV1) |
| 49 { | |
| 0 | 50 ulong maxval; |
| 51 ulong minval; | |
| 52 ulong defaultval; // default initializer | |
| 79 | 53 } |
| 54 else | |
| 55 { | |
| 0 | 56 Expression maxval; |
| 57 Expression minval; | |
| 58 Expression defaultval; // default initializer | |
| 59 } | |
| 60 bool isdeprecated; | |
| 61 | |
| 62 this(Loc loc, Identifier id, Type memtype) | |
| 63 { | |
| 64 super(id); | |
| 65 this.loc = loc; | |
| 66 type = new TypeEnum(this); | |
| 67 this.memtype = memtype; | |
| 68 } | |
| 69 | |
| 72 | 70 override Dsymbol syntaxCopy(Dsymbol s) |
| 0 | 71 { |
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72 Type t = null; |
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73 if (memtype) |
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74 t = memtype.syntaxCopy(); |
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75 |
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76 EnumDeclaration ed; |
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77 if (s) |
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78 { ed = cast(EnumDeclaration)s; |
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79 ed.memtype = t; |
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80 } |
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81 else |
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82 ed = new EnumDeclaration(loc, ident, t); |
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83 ScopeDsymbol.syntaxCopy(ed); |
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84 return ed; |
| 0 | 85 } |
| 86 | |
| 72 | 87 override void semantic(Scope sc) |
| 0 | 88 { |
| 89 Type t; | |
| 90 Scope sce; | |
| 91 | |
| 92 //writef("EnumDeclaration.semantic(sd = %p, '%s') %s\n", sc.scopesym, sc.scopesym.toChars(), toChars()); | |
| 93 //writef("EnumDeclaration.semantic() %s\n", toChars()); | |
| 94 if (!members) // enum ident; | |
| 95 return; | |
| 96 | |
| 97 if (!memtype && !isAnonymous()) | |
| 98 { | |
| 99 // Set memtype if we can to reduce fwd reference errors | |
| 100 memtype = Type.tint32; // case 1) enum ident { ... } | |
| 101 } | |
| 102 | |
| 103 if (symtab) // if already done | |
| 104 { | |
| 105 if (!scope_) | |
| 106 return; // semantic() already completed | |
| 107 } | |
| 108 else | |
| 109 symtab = new DsymbolTable(); | |
| 110 | |
| 111 Scope scx = null; | |
| 112 if (scope_) | |
| 113 { sc = scope_; | |
| 114 scx = scope_; // save so we don't make redundant copies | |
| 115 scope_ = null; | |
| 116 } | |
| 117 | |
| 118 if (sc.stc & STC.STCdeprecated) | |
| 119 isdeprecated = true; | |
| 120 | |
| 121 parent = sc.parent; | |
| 122 | |
| 123 /* The separate, and distinct, cases are: | |
| 124 * 1. enum { ... } | |
| 125 * 2. enum : memtype { ... } | |
| 126 * 3. enum ident { ... } | |
| 127 * 4. enum ident : memtype { ... } | |
| 128 */ | |
| 129 | |
| 130 if (memtype) | |
| 131 { | |
| 132 memtype = memtype.semantic(loc, sc); | |
| 133 | |
| 134 /* Check to see if memtype is forward referenced | |
| 135 */ | |
| 136 if (memtype.ty == TY.Tenum) | |
| 137 { EnumDeclaration sym = cast(EnumDeclaration)memtype.toDsymbol(sc); | |
| 138 if (!sym.memtype || !sym.members || !sym.symtab || sym.scope_) | |
| 139 { | |
| 140 // memtype is forward referenced, so try again later | |
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141 scope_ = scx ? scx : sc.clone(); |
| 0 | 142 scope_.setNoFree(); |
| 143 scope_.module_.addDeferredSemantic(this); | |
| 144 writef("\tdeferring %s\n", toChars()); | |
| 145 return; | |
| 146 } | |
| 147 } | |
| 148 static if (false) { | |
| 149 // Decided to abandon this restriction for D 2.0 | |
| 150 if (!memtype.isintegral()) | |
| 151 { error("base type must be of integral type, not %s", memtype.toChars()); | |
| 152 memtype = Type.tint32; | |
| 153 } | |
| 154 } | |
| 155 } | |
| 156 | |
| 157 type = type.semantic(loc, sc); | |
| 158 if (isAnonymous()) | |
| 159 sce = sc; | |
| 160 else | |
| 161 { sce = sc.push(this); | |
| 162 sce.parent = this; | |
| 163 } | |
| 164 if (members.dim == 0) | |
| 165 error("enum %s must have at least one member", toChars()); | |
| 166 int first = 1; | |
| 167 Expression elast = null; | |
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168 foreach (Dsymbol s; members) |
| 0 | 169 { |
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170 EnumMember em = s.isEnumMember(); |
| 0 | 171 Expression e; |
| 172 | |
| 173 if (!em) | |
| 174 /* The e.semantic(sce) can insert other symbols, such as | |
| 175 * template instances and function literals. | |
| 176 */ | |
| 177 continue; | |
| 178 | |
| 179 //printf(" Enum member '%s'\n",em.toChars()); | |
| 180 if (em.type) | |
| 181 em.type = em.type.semantic(em.loc, sce); | |
| 182 e = em.value; | |
| 183 if (e) | |
| 184 { | |
| 185 assert(e.dyncast() == DYNCAST.DYNCAST_EXPRESSION); | |
| 186 e = e.semantic(sce); | |
| 187 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 188 if (memtype) | |
| 189 { | |
| 190 e = e.implicitCastTo(sce, memtype); | |
| 191 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 192 if (!isAnonymous()) | |
| 193 e = e.castTo(sce, type); | |
| 194 t = memtype; | |
| 195 } | |
| 196 else if (em.type) | |
| 197 { | |
| 198 e = e.implicitCastTo(sce, em.type); | |
| 199 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 200 assert(isAnonymous()); | |
| 201 t = e.type; | |
| 202 } | |
| 203 else | |
| 204 t = e.type; | |
| 205 } | |
| 206 else if (first) | |
| 207 { | |
| 208 if (memtype) | |
| 209 t = memtype; | |
| 210 else if (em.type) | |
| 211 t = em.type; | |
| 212 else | |
| 213 t = Type.tint32; | |
| 214 e = new IntegerExp(em.loc, 0, Type.tint32); | |
| 215 e = e.implicitCastTo(sce, t); | |
| 216 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 217 if (!isAnonymous()) | |
| 218 e = e.castTo(sce, type); | |
| 219 } | |
| 220 else | |
| 221 { | |
| 222 // Set value to (elast + 1). | |
| 223 // But first check that (elast != t.max) | |
| 224 assert(elast); | |
| 225 e = new EqualExp(TOK.TOKequal, em.loc, elast, t.getProperty(Loc(0), Id.max)); | |
| 226 e = e.semantic(sce); | |
| 227 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 228 if (e.toInteger()) | |
| 229 error("overflow of enum value %s", elast.toChars()); | |
| 230 | |
| 231 // Now set e to (elast + 1) | |
| 232 e = new AddExp(em.loc, elast, new IntegerExp(em.loc, 1, Type.tint32)); | |
| 233 e = e.semantic(sce); | |
| 234 e = e.castTo(sce, elast.type); | |
| 235 e = e.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 236 } | |
| 237 elast = e; | |
| 238 em.value = e; | |
| 239 | |
| 240 // Add to symbol table only after evaluating 'value' | |
| 241 if (isAnonymous()) | |
| 242 { | |
| 243 /* Anonymous enum members get added to enclosing scope. | |
| 244 */ | |
| 245 for (Scope scxx = sce; scxx; scxx = scxx.enclosing) | |
| 246 { | |
| 247 if (scxx.scopesym) | |
| 248 { | |
| 249 if (!scxx.scopesym.symtab) | |
| 250 scxx.scopesym.symtab = new DsymbolTable(); | |
| 13 | 251 em.addMember(sce, scxx.scopesym, true); |
| 0 | 252 break; |
| 253 } | |
| 254 } | |
| 255 } | |
| 256 else | |
| 13 | 257 em.addMember(sc, this, true); |
| 0 | 258 |
| 259 /* Compute .min, .max and .default values. | |
| 260 * If enum doesn't have a name, we can never identify the enum type, | |
| 261 * so there is no purpose for a .min, .max or .default | |
| 262 */ | |
| 263 if (!isAnonymous()) | |
| 264 { | |
| 265 if (first) | |
| 266 { defaultval = e; | |
| 267 minval = e; | |
| 268 maxval = e; | |
| 269 } | |
| 270 else | |
| 271 { Expression ec; | |
| 272 | |
| 273 /* In order to work successfully with UDTs, | |
| 274 * build expressions to do the comparisons, | |
| 275 * and let the semantic analyzer and constant | |
| 276 * folder give us the result. | |
| 277 */ | |
| 278 | |
| 279 // Compute if(e < minval) | |
| 280 ec = new CmpExp(TOK.TOKlt, em.loc, e, minval); | |
| 281 ec = ec.semantic(sce); | |
| 282 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 283 if (ec.toInteger()) | |
| 284 minval = e; | |
| 285 | |
| 286 ec = new CmpExp(TOK.TOKgt, em.loc, e, maxval); | |
| 287 ec = ec.semantic(sce); | |
| 288 ec = ec.optimize(WANT.WANTvalue | WANT.WANTinterpret); | |
| 289 if (ec.toInteger()) | |
| 290 maxval = e; | |
| 291 } | |
| 292 } | |
| 293 first = 0; | |
| 294 } | |
| 295 //printf("defaultval = %lld\n", defaultval); | |
| 296 | |
| 297 //if (defaultval) printf("defaultval: %s %s\n", defaultval.toChars(), defaultval.type.toChars()); | |
| 298 if (sc != sce) | |
| 299 sce.pop(); | |
| 300 //members.print(); | |
| 301 } | |
| 302 | |
| 72 | 303 override bool oneMember(Dsymbol* ps) |
| 0 | 304 { |
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305 if (isAnonymous()) |
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306 return Dsymbol.oneMembers(members, ps); |
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307 return Dsymbol.oneMember(ps); |
| 0 | 308 } |
| 309 | |
| 72 | 310 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 311 { |
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312 buf.writestring("enum "); |
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313 if (ident) |
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314 { buf.writestring(ident.toChars()); |
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315 buf.writeByte(' '); |
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316 } |
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317 if (memtype) |
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318 { |
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319 buf.writestring(": "); |
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320 memtype.toCBuffer(buf, null, hgs); |
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321 } |
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322 if (!members) |
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323 { |
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324 buf.writeByte(';'); |
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325 buf.writenl(); |
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326 return; |
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327 } |
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328 buf.writenl(); |
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329 buf.writeByte('{'); |
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330 buf.writenl(); |
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331 foreach(Dsymbol s; members) |
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332 { |
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333 EnumMember em = s.isEnumMember(); |
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334 if (!em) |
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335 continue; |
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336 //buf.writestring(" "); |
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337 em.toCBuffer(buf, hgs); |
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338 buf.writeByte(','); |
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339 buf.writenl(); |
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340 } |
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341 buf.writeByte('}'); |
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342 buf.writenl(); |
| 0 | 343 } |
| 344 | |
| 72 | 345 override Type getType() |
| 0 | 346 { |
| 347 return type; | |
| 348 } | |
| 349 | |
| 72 | 350 override string kind() |
| 0 | 351 { |
| 352 return "enum"; | |
| 353 } | |
| 354 | |
| 355 version (DMDV2) { | |
| 72 | 356 override Dsymbol search(Loc, Identifier ident, int flags) |
| 0 | 357 { |
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358 //printf("%s.EnumDeclaration.search('%s')\n", toChars(), ident.toChars()); |
| 0 | 359 if (scope_) |
| 360 // Try one last time to resolve this enum | |
| 361 semantic(scope_); | |
| 362 | |
| 363 if (!members || !symtab || scope_) | |
| 364 { | |
| 365 error("is forward referenced when looking for '%s'", ident.toChars()); | |
| 366 //*(char*)0=0; | |
| 367 return null; | |
| 368 } | |
| 369 | |
| 370 return ScopeDsymbol.search(loc, ident, flags); | |
| 371 } | |
| 372 } | |
| 72 | 373 override bool isDeprecated() // is Dsymbol deprecated? |
| 0 | 374 { |
| 375 return isdeprecated; | |
| 376 } | |
| 377 | |
| 72 | 378 override void emitComment(Scope sc) |
| 0 | 379 { |
| 380 assert(false); | |
| 381 } | |
| 79 | 382 |
| 383 override void toJsonBuffer(OutBuffer buf) | |
| 384 { | |
| 385 //writef("EnumDeclaration.toJsonBuffer()\n"); | |
| 386 if (isAnonymous()) | |
| 387 { | |
| 388 if (members) | |
| 389 { | |
| 390 foreach (Dsymbol s; members) | |
| 391 { | |
| 392 s.toJsonBuffer(buf); | |
| 393 buf.writestring(",\n"); | |
| 394 } | |
| 395 JsonRemoveComma(buf); | |
| 396 } | |
| 397 return; | |
| 398 } | |
| 0 | 399 |
| 79 | 400 buf.writestring("{\n"); |
| 401 | |
| 402 JsonProperty(buf, Pname, toChars()); | |
| 403 JsonProperty(buf, Pkind, kind()); | |
| 404 if (comment) | |
| 405 JsonProperty(buf, Pcomment, comment); | |
| 406 | |
| 407 if (loc.linnum) | |
| 408 JsonProperty(buf, Pline, loc.linnum); | |
| 409 | |
| 410 if (memtype) | |
| 411 JsonProperty(buf, "base", memtype.toChars()); | |
| 412 | |
| 413 JsonString(buf, Pmembers); | |
| 414 buf.writestring(" : [\n"); | |
| 415 size_t offset = buf.offset; | |
| 416 foreach (Dsymbol s; members) | |
| 417 { | |
| 418 if (offset != buf.offset) | |
| 419 { | |
| 420 buf.writestring(","); | |
| 421 offset = buf.offset; | |
| 422 } | |
| 423 s.toJsonBuffer(buf); | |
| 424 } | |
| 425 buf.writestring("]\n"); | |
| 426 | |
| 427 buf.writestring("}\n"); | |
| 428 } | |
| 429 | |
| 72 | 430 override void toDocBuffer(OutBuffer buf) |
| 0 | 431 { |
| 432 assert(false); | |
| 433 } | |
| 434 | |
| 72 | 435 override EnumDeclaration isEnumDeclaration() { return this; } |
| 0 | 436 |
| 72 | 437 override void toObjFile(int multiobj) // compile to .obj file |
| 0 | 438 { |
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439 //printf("EnumDeclaration.toObjFile('%s')\n", toChars()); |
| 0 | 440 version (DMDV2) { |
| 441 if (isAnonymous()) | |
| 442 return; | |
| 443 } | |
| 444 | |
| 445 if (global.params.symdebug) | |
| 446 toDebug(); | |
| 447 | |
| 448 type.getTypeInfo(null); // generate TypeInfo | |
| 449 | |
| 450 TypeEnum tc = cast(TypeEnum)type; | |
| 451 if (!tc.sym.defaultval || type.isZeroInit(Loc(0))) { | |
| 452 ; | |
| 453 } else { | |
| 454 SC scclass = SCglobal; | |
| 455 if (inTemplateInstance()) | |
| 456 scclass = SCcomdat; | |
| 457 | |
| 458 // Generate static initializer | |
| 459 toInitializer(); | |
| 460 sinit.Sclass = scclass; | |
| 461 sinit.Sfl = FLdata; | |
| 462 version (ELFOBJ) { // Burton | |
| 463 sinit.Sseg = Segment.CDATA; | |
| 464 } | |
| 465 version (MACHOBJ) { | |
| 466 sinit.Sseg = Segment.DATA; | |
| 467 } | |
| 468 version (DMDV1) { | |
| 469 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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470 //sinit.Sdt = tc.sym.init.toDt(); |
| 0 | 471 } |
| 472 version (DMDV2) { | |
| 473 tc.sym.defaultval.toDt(&sinit.Sdt); | |
| 474 } | |
| 475 outdata(sinit); | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 void toDebug() | |
| 480 { | |
| 481 assert(false); | |
| 482 } | |
| 483 | |
| 72 | 484 override int cvMember(ubyte* p) |
| 0 | 485 { |
| 486 assert(false); | |
| 487 } | |
| 488 | |
| 489 Symbol* sinit; | |
| 490 | |
| 491 Symbol* toInitializer() | |
| 492 { | |
| 493 Symbol* s; | |
| 494 Classsym* stag; | |
| 495 | |
| 496 if (!sinit) | |
| 497 { | |
| 498 stag = fake_classsym(Id.ClassInfo); | |
| 499 Identifier ident_save = ident; | |
| 500 if (!ident) | |
| 501 ident = Lexer.uniqueId("__enum"); | |
| 502 s = toSymbolX("__init", SCextern, stag.Stype, "Z"); | |
| 503 ident = ident_save; | |
| 504 s.Sfl = FLextern; | |
| 505 s.Sflags |= SFLnodebug; | |
| 506 slist_add(s); | |
| 507 sinit = s; | |
| 508 } | |
| 509 | |
| 510 return sinit; | |
| 511 } | |
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Fleshed out more unimplemented methods.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
512 }; |