Mercurial > projects > ddmd
annotate dmd/ForeachStatement.d @ 135:af1bebfd96a4 dmd2037
dmd 2.038
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 13 Sep 2010 22:19:42 +0100 |
| parents | 60bb0fe4563e |
| children | 94b6033c07f3 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.ForeachStatement; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Statement; |
| 5 import dmd.TOK; | |
| 66 | 6 import dmd.Token; |
| 0 | 7 import dmd.Loc; |
| 8 import dmd.LINK; | |
| 9 import dmd.ArrayTypes; | |
| 10 import dmd.Expression; | |
| 11 import dmd.VarDeclaration; | |
| 12 import dmd.FuncDeclaration; | |
| 13 import dmd.Array; | |
| 14 import dmd.Scope; | |
| 15 import dmd.InterState; | |
| 16 import dmd.InlineScanState; | |
| 17 import dmd.OutBuffer; | |
| 18 import dmd.HdrGenState; | |
| 19 import dmd.IRState; | |
| 20 import dmd.BE; | |
| 21 import dmd.ScopeDsymbol; | |
| 22 import dmd.TypeAArray; | |
| 23 import dmd.Type; | |
| 24 import dmd.CallExp; | |
| 25 import dmd.WANT; | |
| 26 import dmd.TY; | |
| 27 import dmd.TypeTuple; | |
| 28 import dmd.TupleExp; | |
| 29 import dmd.Global; | |
| 30 import dmd.Initializer; | |
| 31 import dmd.ExpInitializer; | |
| 32 import dmd.IntegerExp; | |
| 33 import dmd.ExpStatement; | |
| 34 import dmd.DeclarationExp; | |
| 35 import dmd.Dsymbol; | |
| 36 import dmd.BreakStatement; | |
| 37 import dmd.DefaultStatement; | |
| 38 import dmd.CaseStatement; | |
| 39 import dmd.SwitchStatement; | |
| 40 import dmd.VarExp; | |
| 41 import dmd.AliasDeclaration; | |
| 42 import dmd.CompoundStatement; | |
| 43 import dmd.ScopeStatement; | |
| 44 import dmd.UnrolledLoopStatement; | |
| 45 import dmd.Identifier; | |
| 46 import dmd.Lexer; | |
| 47 import dmd.DeclarationStatement; | |
| 48 import dmd.CompoundDeclarationStatement; | |
| 49 import dmd.AggregateDeclaration; | |
| 50 import dmd.TypeClass; | |
| 51 import dmd.NotExp; | |
| 52 import dmd.TypeStruct; | |
| 53 import dmd.FuncLiteralDeclaration; | |
| 54 import dmd.IdentifierExp; | |
| 55 import dmd.TypeFunction; | |
| 56 import dmd.GotoStatement; | |
| 57 import dmd.FuncExp; | |
| 58 import dmd.ReturnStatement; | |
| 59 import dmd.IndexExp; | |
| 60 import dmd.ForStatement; | |
| 61 import dmd.SliceExp; | |
| 62 import dmd.DotIdExp; | |
| 63 import dmd.PostExp; | |
| 64 import dmd.AddAssignExp; | |
| 65 import dmd.CmpExp; | |
| 66 import dmd.Id; | |
|
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67 import dmd.Parameter; |
| 0 | 68 import dmd.STC; |
| 69 | |
| 70 import dmd.expression.Util; | |
| 71 | |
| 72 import core.stdc.stdio; | |
| 73 | |
| 74 class ForeachStatement : Statement | |
| 75 { | |
| 76 TOK op; // TOKforeach or TOKforeach_reverse | |
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77 Parameters arguments; // array of Argument*'s |
| 0 | 78 Expression aggr; |
| 79 Statement body_; | |
| 80 | |
| 81 VarDeclaration key; | |
| 82 VarDeclaration value; | |
| 83 | |
| 84 FuncDeclaration func; // function we're lexically in | |
| 85 | |
| 86 Array cases; // put breaks, continues, gotos and returns here | |
| 87 Array gotos; // forward referenced goto's go here | |
| 88 | |
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89 this(Loc loc, TOK op, Parameters arguments, Expression aggr, Statement body_) |
| 0 | 90 { |
| 91 super(loc); | |
| 92 | |
| 93 this.op = op; | |
| 94 this.arguments = arguments; | |
| 95 this.aggr = aggr; | |
| 96 this.body_ = body_; | |
| 97 | |
| 98 gotos = new Array(); | |
| 99 cases = new Array(); | |
| 100 } | |
| 101 | |
| 72 | 102 override Statement syntaxCopy() |
| 0 | 103 { |
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104 auto args = Parameter.arraySyntaxCopy(arguments); |
| 53 | 105 Expression exp = aggr.syntaxCopy(); |
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106 auto s = new ForeachStatement(loc, op, args, exp, |
| 53 | 107 body_ ? body_.syntaxCopy() : null); |
| 108 return s; | |
| 0 | 109 } |
| 110 | |
| 72 | 111 override Statement semantic(Scope sc) |
| 0 | 112 { |
| 113 //printf("ForeachStatement.semantic() %p\n", this); | |
| 114 ScopeDsymbol sym; | |
| 115 Statement s = this; | |
| 116 size_t dim = arguments.dim; | |
| 117 TypeAArray taa = null; | |
| 135 | 118 Dsymbol sapply = null; |
| 0 | 119 |
| 120 Type tn = null; | |
| 121 Type tnv = null; | |
| 122 | |
| 123 func = sc.func; | |
| 124 if (func.fes) | |
| 125 func = func.fes.func; | |
| 126 | |
| 127 aggr = aggr.semantic(sc); | |
| 128 aggr = resolveProperties(sc, aggr); | |
| 129 aggr = aggr.optimize(WANT.WANTvalue); | |
| 130 if (!aggr.type) | |
| 131 { | |
| 132 error("invalid foreach aggregate %s", aggr.toChars()); | |
| 133 return this; | |
| 134 } | |
| 135 | |
| 136 inferApplyArgTypes(op, arguments, aggr); | |
| 137 | |
| 138 /* Check for inference errors | |
| 139 */ | |
| 140 if (dim != arguments.dim) | |
| 141 { | |
| 142 //printf("dim = %d, arguments.dim = %d\n", dim, arguments.dim); | |
| 143 error("cannot uniquely infer foreach argument types"); | |
| 144 return this; | |
| 145 } | |
| 146 | |
| 147 Type tab = aggr.type.toBasetype(); | |
| 148 | |
| 149 if (tab.ty == TY.Ttuple) // don't generate new scope for tuple loops | |
| 150 { | |
| 151 if (dim < 1 || dim > 2) | |
| 152 { | |
| 153 error("only one (value) or two (key,value) arguments for tuple foreach"); | |
| 154 return s; | |
| 155 } | |
| 156 | |
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157 auto tuple = cast(TypeTuple)tab; |
| 0 | 158 Statements statements = new Statements(); |
| 159 //printf("aggr: op = %d, %s\n", aggr.op, aggr.toChars()); | |
| 160 size_t n; | |
| 161 TupleExp te = null; | |
| 162 if (aggr.op == TOK.TOKtuple) // expression tuple | |
| 163 { | |
| 164 te = cast(TupleExp)aggr; | |
| 165 n = te.exps.dim; | |
| 166 } | |
| 167 else if (aggr.op == TOK.TOKtype) // type tuple | |
| 168 { | |
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169 n = Parameter.dim(tuple.arguments); |
| 0 | 170 } |
| 171 else | |
| 172 assert(0); | |
| 173 | |
| 174 for (size_t j = 0; j < n; j++) | |
| 175 { | |
| 176 size_t k = (op == TOK.TOKforeach) ? j : n - 1 - j; | |
| 177 Expression e; | |
| 178 Type t; | |
| 179 if (te) | |
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180 e = te.exps[k]; |
| 0 | 181 else |
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182 t = Parameter.getNth(tuple.arguments, k).type; |
| 0 | 183 |
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184 auto arg = arguments[0]; |
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185 auto st = new Statements(); |
| 0 | 186 |
| 187 if (dim == 2) | |
| 188 { | |
| 189 // Declare key | |
| 190 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 191 error("no storage class for key %s", arg.ident.toChars()); | |
| 192 TY keyty = arg.type.ty; | |
| 193 if (keyty != TY.Tint32 && keyty != TY.Tuns32) | |
| 194 { | |
| 195 if (global.params.isX86_64) | |
| 196 { | |
| 197 if (keyty != TY.Tint64 && keyty != TY.Tuns64) | |
| 198 error("foreach: key type must be int or uint, long or ulong, not %s", arg.type.toChars()); | |
| 199 } | |
| 200 else | |
| 201 error("foreach: key type must be int or uint, not %s", arg.type.toChars()); | |
| 202 } | |
| 203 Initializer ie = new ExpInitializer(Loc(0), new IntegerExp(k)); | |
| 204 VarDeclaration var = new VarDeclaration(loc, arg.type, arg.ident, ie); | |
| 205 var.storage_class |= STC.STCmanifest; | |
| 206 DeclarationExp de = new DeclarationExp(loc, var); | |
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207 st.push(new ExpStatement(loc, de)); |
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208 arg = arguments[1]; // value |
| 0 | 209 } |
| 210 // Declare value | |
| 211 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 212 error("no storage class for value %s", arg.ident.toChars()); | |
| 213 Dsymbol var; | |
| 214 if (te) | |
| 215 { | |
| 216 Type tb = e.type.toBasetype(); | |
| 217 if ((tb.ty == TY.Tfunction || tb.ty == TY.Tsarray) && e.op == TOK.TOKvar) | |
| 218 { | |
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219 auto ve = cast(VarExp)e; |
| 0 | 220 var = new AliasDeclaration(loc, arg.ident, ve.var); |
| 221 } | |
| 222 else | |
| 223 { | |
| 224 arg.type = e.type; | |
| 225 Initializer ie = new ExpInitializer(Loc(0), e); | |
| 226 VarDeclaration v = new VarDeclaration(loc, arg.type, arg.ident, ie); | |
| 227 if (e.isConst()) | |
| 228 v.storage_class |= STC.STCconst; | |
| 229 | |
| 230 var = v; | |
| 231 } | |
| 232 } | |
| 233 else | |
| 234 { | |
| 235 var = new AliasDeclaration(loc, arg.ident, t); | |
| 236 } | |
| 237 | |
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238 auto de = new DeclarationExp(loc, var); |
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239 st.push(new ExpStatement(loc, de)); |
| 0 | 240 |
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241 st.push(body_.syntaxCopy()); |
| 0 | 242 s = new CompoundStatement(loc, st); |
| 243 s = new ScopeStatement(loc, s); | |
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244 statements.push(s); |
| 0 | 245 } |
| 246 | |
| 247 s = new UnrolledLoopStatement(loc, statements); | |
| 248 s = s.semantic(sc); | |
| 249 return s; | |
| 250 } | |
| 251 | |
| 252 sym = new ScopeDsymbol(); | |
| 253 sym.parent = sc.scopesym; | |
| 254 sc = sc.push(sym); | |
| 255 | |
| 256 sc.noctor++; | |
| 257 | |
| 96 | 258 Lagain: |
| 135 | 259 Identifier idapply = (op == TOK.TOKforeach_reverse) |
| 260 ? Id.applyReverse : Id.apply; | |
| 261 sapply = null; | |
| 0 | 262 switch (tab.ty) |
| 263 { | |
| 264 case TY.Tarray: | |
| 265 case TY.Tsarray: | |
| 266 if (!checkForArgTypes()) | |
| 267 return this; | |
| 268 | |
| 269 if (dim < 1 || dim > 2) | |
| 270 { | |
| 271 error("only one or two arguments for array foreach"); | |
| 272 break; | |
| 273 } | |
| 274 | |
| 275 /* Look for special case of parsing char types out of char type | |
| 276 * array. | |
| 277 */ | |
| 278 tn = tab.nextOf().toBasetype(); | |
| 279 if (tn.ty == TY.Tchar || tn.ty == TY.Twchar || tn.ty == TY.Tdchar) | |
| 280 { | |
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281 Parameter arg; |
| 0 | 282 |
| 283 int i = (dim == 1) ? 0 : 1; // index of value | |
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284 arg = arguments[i]; |
| 0 | 285 arg.type = arg.type.semantic(loc, sc); |
| 286 tnv = arg.type.toBasetype(); | |
| 287 if (tnv.ty != tn.ty && (tnv.ty == TY.Tchar || tnv.ty == TY.Twchar || tnv.ty == TY.Tdchar)) | |
| 288 { | |
| 289 if (arg.storageClass & STC.STCref) | |
| 290 error("foreach: value of UTF conversion cannot be ref"); | |
| 291 if (dim == 2) | |
| 292 { | |
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293 arg = arguments[0]; |
| 0 | 294 if (arg.storageClass & STC.STCref) |
| 295 error("foreach: key cannot be ref"); | |
| 296 } | |
| 297 goto Lapply; | |
| 298 } | |
| 299 } | |
| 300 | |
| 301 for (size_t i = 0; i < dim; i++) | |
| 302 { | |
| 303 // Declare args | |
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304 auto arg = arguments[i]; |
| 0 | 305 Type argtype = arg.type.semantic(loc, sc); |
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306 auto var = new VarDeclaration(loc, argtype, arg.ident, null); |
| 0 | 307 var.storage_class |= STC.STCforeach; |
| 308 var.storage_class |= arg.storageClass & (STC.STCin | STC.STCout | STC.STCref | STC.STC_TYPECTOR); | |
| 309 if (var.storage_class & (STC.STCref | STC.STCout)) | |
| 310 var.storage_class |= STC.STCnodtor; | |
| 311 | |
| 312 if (dim == 2 && i == 0) | |
| 313 { | |
| 314 key = var; | |
| 315 //var.storage_class |= STCfinal; | |
| 316 } | |
| 317 else | |
| 318 { | |
| 319 value = var; | |
| 320 /* Reference to immutable data should be marked as const | |
| 321 */ | |
| 322 if (var.storage_class & STC.STCref && !tn.isMutable()) | |
| 323 { | |
| 324 var.storage_class |= STC.STCconst; | |
| 325 } | |
| 326 } | |
| 96 | 327 static if (false) |
| 328 { | |
| 0 | 329 DeclarationExp de = new DeclarationExp(loc, var); |
| 330 de.semantic(sc); | |
| 331 } | |
| 332 } | |
| 333 | |
| 96 | 334 static if (true) |
| 335 { | |
| 0 | 336 { |
| 337 /* Convert to a ForStatement | |
| 338 * foreach (key, value; a) body => | |
| 339 * for (T[] tmp = a[], size_t key; key < tmp.length; ++key) | |
| 340 * { T value = tmp[k]; body } | |
| 341 * | |
| 342 * foreach_reverse (key, value; a) body => | |
| 343 * for (T[] tmp = a[], size_t key = tmp.length; key--; ) | |
| 344 * { T value = tmp[k]; body } | |
| 345 */ | |
| 346 Identifier id = Lexer.uniqueId("__aggr"); | |
| 347 ExpInitializer ie = new ExpInitializer(loc, new SliceExp(loc, aggr, null, null)); | |
| 348 VarDeclaration tmp = new VarDeclaration(loc, aggr.type.nextOf().arrayOf(), id, ie); | |
| 349 | |
| 350 Expression tmp_length = new DotIdExp(loc, new VarExp(loc, tmp), Id.length); | |
| 351 | |
| 352 if (!key) | |
| 353 { | |
| 354 Identifier id2 = Lexer.uniqueId("__key"); | |
| 355 key = new VarDeclaration(loc, Type.tsize_t, id2, null); | |
| 356 } | |
| 357 | |
| 358 if (op == TOK.TOKforeach_reverse) | |
| 359 key.init = new ExpInitializer(loc, tmp_length); | |
| 360 else | |
| 361 key.init = new ExpInitializer(loc, new IntegerExp(0)); | |
| 362 | |
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363 auto cs = new Statements(); |
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364 cs.push(new DeclarationStatement(loc, new DeclarationExp(loc, tmp))); |
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365 cs.push(new DeclarationStatement(loc, new DeclarationExp(loc, key))); |
| 0 | 366 Statement forinit = new CompoundDeclarationStatement(loc, cs); |
| 367 | |
| 368 Expression cond; | |
| 369 if (op == TOK.TOKforeach_reverse) | |
| 370 // key-- | |
| 371 cond = new PostExp(TOK.TOKminusminus, loc, new VarExp(loc, key)); | |
| 372 else | |
| 373 // key < tmp.length | |
| 374 cond = new CmpExp(TOK.TOKlt, loc, new VarExp(loc, key), tmp_length); | |
| 375 | |
| 376 Expression increment = null; | |
| 377 if (op == TOK.TOKforeach) | |
| 378 // key += 1 | |
| 379 increment = new AddAssignExp(loc, new VarExp(loc, key), new IntegerExp(1)); | |
| 380 | |
| 381 // T value = tmp[key]; | |
| 382 value.init = new ExpInitializer(loc, new IndexExp(loc, new VarExp(loc, tmp), new VarExp(loc, key))); | |
| 383 Statement ds = new DeclarationStatement(loc, new DeclarationExp(loc, value)); | |
| 384 | |
| 385 body_ = new CompoundStatement(loc, ds, body_); | |
| 386 | |
| 387 ForStatement fs = new ForStatement(loc, forinit, cond, increment, body_); | |
| 388 s = fs.semantic(sc); | |
| 389 break; | |
| 390 } | |
| 391 } else { | |
| 392 if (tab.nextOf().implicitConvTo(value.type) < MATCH.MATCHconst) | |
| 393 { | |
| 394 if (aggr.op == TOK.TOKstring) | |
| 395 aggr = aggr.implicitCastTo(sc, value.type.arrayOf()); | |
| 396 else | |
| 397 error("foreach: %s is not an array of %s", | |
| 398 tab.toChars(), value.type.toChars()); | |
| 399 } | |
| 400 | |
| 401 if (key) | |
| 402 { | |
| 403 if (key.type.ty != Tint32 && key.type.ty != Tuns32) | |
| 404 { | |
| 405 if (global.params.isX86_64) | |
| 406 { | |
| 407 if (key.type.ty != Tint64 && key.type.ty != Tuns64) | |
| 408 error("foreach: key type must be int or uint, long or ulong, not %s", key.type.toChars()); | |
| 409 } | |
| 410 else | |
| 411 error("foreach: key type must be int or uint, not %s", key.type.toChars()); | |
| 412 } | |
| 413 | |
| 414 if (key.storage_class & (STCout | STCref)) | |
| 415 error("foreach: key cannot be out or ref"); | |
| 416 } | |
| 417 | |
| 418 sc.sbreak = this; | |
| 419 sc.scontinue = this; | |
| 420 body_ = body_.semantic(sc); | |
| 421 break; | |
| 422 } | |
| 423 | |
| 424 case TY.Taarray: | |
| 425 if (!checkForArgTypes()) | |
| 426 return this; | |
| 427 | |
| 428 taa = cast(TypeAArray)tab; | |
| 429 if (dim < 1 || dim > 2) | |
| 430 { | |
| 431 error("only one or two arguments for associative array foreach"); | |
| 432 break; | |
| 433 } | |
| 96 | 434 version(SARRAYVALUE) |
| 435 { | |
| 436 /* This only works if Key or Value is a static array. | |
| 437 */ | |
| 438 tab = taa.getImpl().type; | |
| 439 goto Lagain; | |
| 440 } | |
| 441 else | |
| 442 { | |
| 0 | 443 if (op == TOK.TOKforeach_reverse) |
| 444 { | |
| 445 error("no reverse iteration on associative arrays"); | |
| 446 } | |
| 447 goto Lapply; | |
| 96 | 448 } |
| 0 | 449 case TY.Tclass: |
| 450 case TY.Tstruct: | |
| 451 version (DMDV2) { | |
| 135 | 452 /* Prefer using opApply, if it exists |
| 453 */ | |
| 454 if (dim != 1) // only one argument allowed with ranges | |
| 455 goto Lapply; | |
| 456 | |
| 457 sapply = search_function(cast(AggregateDeclaration)tab.toDsymbol(sc), idapply); | |
| 458 if (sapply) | |
| 459 goto Lapply; | |
| 460 | |
| 0 | 461 { /* Look for range iteration, i.e. the properties |
| 462 * .empty, .next, .retreat, .head and .rear | |
| 463 * foreach (e; aggr) { ... } | |
| 464 * translates to: | |
| 465 * for (auto __r = aggr[]; !__r.empty; __r.next) | |
| 466 * { auto e = __r.head; | |
| 467 * ... | |
| 468 * } | |
| 469 */ | |
| 470 AggregateDeclaration ad = (tab.ty == TY.Tclass) | |
| 471 ? cast(AggregateDeclaration)(cast(TypeClass)tab).sym | |
| 472 : cast(AggregateDeclaration)(cast(TypeStruct)tab).sym; | |
| 473 | |
| 474 Identifier idhead; | |
| 475 Identifier idnext; | |
| 476 if (op == TOK.TOKforeach) | |
| 477 { | |
| 478 idhead = Id.Fhead; | |
| 479 idnext = Id.Fnext; | |
| 480 } | |
| 481 else | |
| 482 { | |
| 483 idhead = Id.Ftoe; | |
| 484 idnext = Id.Fretreat; | |
| 485 } | |
| 486 | |
| 487 Dsymbol shead = search_function(ad, idhead); | |
| 488 if (!shead) | |
| 489 goto Lapply; | |
| 490 | |
| 491 /* Generate a temporary __r and initialize it with the aggregate. | |
| 492 */ | |
| 493 Identifier id = Identifier.generateId("__r"); | |
| 494 Expression rinit = new SliceExp(loc, aggr, null, null); | |
| 495 rinit = rinit.trySemantic(sc); | |
| 496 if (!rinit) // if application of [] failed | |
| 497 rinit = aggr; | |
| 498 | |
| 499 VarDeclaration r = new VarDeclaration(loc, null, id, new ExpInitializer(loc, rinit)); | |
| 500 | |
| 501 // r.semantic(sc); | |
| 502 //printf("r: %s, init: %s\n", r.toChars(), r.init.toChars()); | |
| 503 Statement init = new DeclarationStatement(loc, r); | |
| 504 //printf("init: %s\n", init.toChars()); | |
| 505 | |
| 506 // !__r.empty | |
| 507 Expression e = new VarExp(loc, r); | |
| 508 e = new DotIdExp(loc, e, Id.Fempty); | |
| 509 Expression condition = new NotExp(loc, e); | |
| 510 | |
| 511 // __r.next | |
| 512 e = new VarExp(loc, r); | |
| 513 Expression increment = new DotIdExp(loc, e, idnext); | |
| 514 | |
| 515 /* Declaration statement for e: | |
| 516 * auto e = __r.idhead; | |
| 517 */ | |
| 518 e = new VarExp(loc, r); | |
| 519 Expression einit = new DotIdExp(loc, e, idhead); | |
| 520 // einit = einit.semantic(sc); | |
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521 auto arg = arguments[0]; |
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522 auto ve = new VarDeclaration(loc, arg.type, arg.ident, new ExpInitializer(loc, einit)); |
| 0 | 523 ve.storage_class |= STC.STCforeach; |
| 524 ve.storage_class |= arg.storageClass & (STC.STCin | STC.STCout | STC.STCref | STC.STC_TYPECTOR); | |
| 525 | |
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526 auto de = new DeclarationExp(loc, ve); |
| 0 | 527 |
| 528 Statement body2 = new CompoundStatement(loc, new DeclarationStatement(loc, de), this.body_); | |
| 529 s = new ForStatement(loc, init, condition, increment, body2); | |
| 530 | |
| 531 static if (false) { | |
| 532 printf("init: %s\n", init.toChars()); | |
| 533 printf("condition: %s\n", condition.toChars()); | |
| 534 printf("increment: %s\n", increment.toChars()); | |
| 535 printf("body: %s\n", body2.toChars()); | |
| 536 } | |
| 537 s = s.semantic(sc); | |
| 538 break; | |
| 539 } | |
| 540 } | |
| 541 case TY.Tdelegate: | |
| 542 Lapply: | |
| 543 { | |
| 544 Expression ec; | |
| 545 Expression e; | |
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546 Parameter a; |
| 0 | 547 |
| 548 if (!checkForArgTypes()) | |
| 549 { | |
| 550 body_ = body_.semantic(sc); | |
| 551 return this; | |
| 552 } | |
| 553 | |
| 135 | 554 Type tret = func.type.nextOf(); |
| 0 | 555 |
| 556 // Need a variable to hold value from any return statements in body. | |
| 557 if (!sc.func.vresult && tret && tret != Type.tvoid) | |
| 558 { | |
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559 auto v = new VarDeclaration(loc, tret, Id.result, null); |
| 0 | 560 v.noauto = true; |
| 561 v.semantic(sc); | |
| 562 if (!sc.insert(v)) | |
| 563 assert(0); | |
| 564 | |
| 565 v.parent = sc.func; | |
| 566 sc.func.vresult = v; | |
| 567 } | |
| 568 | |
| 569 /* Turn body into the function literal: | |
| 570 * int delegate(ref T arg) { body } | |
| 571 */ | |
| 135 | 572 auto args = new Parameters(); |
| 0 | 573 for (size_t i = 0; i < dim; i++) |
| 574 { | |
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575 auto arg = arguments[i]; |
| 135 | 576 Identifier id; |
| 0 | 577 |
| 578 arg.type = arg.type.semantic(loc, sc); | |
| 579 if (arg.storageClass & STC.STCref) | |
| 580 id = arg.ident; | |
| 581 else | |
| 582 { // Make a copy of the ref argument so it isn't | |
| 583 // a reference. | |
| 584 id = Lexer.uniqueId("__applyArg", i); | |
| 585 | |
| 135 | 586 Initializer ie = new ExpInitializer(Loc(0), new IdentifierExp(Loc(0), id)); |
| 587 auto v = new VarDeclaration(Loc(0), arg.type, arg.ident, ie); | |
| 0 | 588 s = new DeclarationStatement(Loc(0), v); |
| 589 body_ = new CompoundStatement(loc, s, body_); | |
| 590 } | |
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591 a = new Parameter(STC.STCref, arg.type, id, null); |
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592 args.push(a); |
| 0 | 593 } |
| 135 | 594 Type t = new TypeFunction(args, Type.tint32, 0, LINK.LINKd); |
| 595 FuncLiteralDeclaration fld = new FuncLiteralDeclaration(loc, Loc(0), t, TOK.TOKdelegate, this); | |
| 0 | 596 fld.fbody = body_; |
| 135 | 597 Expression flde = new FuncExp(loc, fld); |
| 0 | 598 flde = flde.semantic(sc); |
| 599 fld.tookAddressOf = 0; | |
| 600 | |
| 601 // Resolve any forward referenced goto's | |
| 135 | 602 for (size_t i = 0; i < gotos.dim; i++) |
| 0 | 603 { |
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604 auto cs = cast(CompoundStatement)gotos.data[i]; |
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605 auto gs = cast(GotoStatement)cs.statements[0]; |
| 0 | 606 |
| 607 if (!gs.label.statement) | |
| 608 { | |
| 609 // 'Promote' it to this scope, and replace with a return | |
| 610 cases.push(cast(void*)gs); | |
| 611 s = new ReturnStatement(Loc(0), new IntegerExp(cases.dim + 1)); | |
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612 cs.statements[0] = s; |
| 0 | 613 } |
| 614 } | |
| 615 | |
| 616 if (tab.ty == TY.Taarray) | |
| 617 { | |
| 618 // Check types | |
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619 auto arg = arguments[0]; |
| 0 | 620 if (dim == 2) |
| 621 { | |
| 622 if (arg.storageClass & STC.STCref) | |
| 623 error("foreach: index cannot be ref"); | |
| 624 if (!arg.type.equals(taa.index)) | |
| 625 error("foreach: index must be type %s, not %s", taa.index.toChars(), arg.type.toChars()); | |
| 626 | |
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627 arg = arguments[1]; |
| 0 | 628 } |
| 629 if (!arg.type.equals(taa.nextOf())) | |
| 630 error("foreach: value must be type %s, not %s", taa.nextOf().toChars(), arg.type.toChars()); | |
| 631 | |
| 632 /* Call: | |
| 633 * _aaApply(aggr, keysize, flde) | |
| 634 */ | |
| 135 | 635 FuncDeclaration fdapply; |
| 0 | 636 if (dim == 2) |
| 637 fdapply = FuncDeclaration.genCfunc(Type.tindex, "_aaApply2"); | |
| 638 else | |
| 639 fdapply = FuncDeclaration.genCfunc(Type.tindex, "_aaApply"); | |
| 640 | |
| 641 ec = new VarExp(Loc(0), fdapply); | |
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642 auto exps = new Expressions(); |
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643 exps.push(aggr); |
| 0 | 644 size_t keysize = cast(uint)taa.index.size(); |
| 645 keysize = (keysize + (PTRSIZE-1)) & ~(PTRSIZE-1); | |
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646 exps.push(new IntegerExp(Loc(0), keysize, Type.tsize_t)); |
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647 exps.push(flde); |
| 0 | 648 e = new CallExp(loc, ec, exps); |
| 649 e.type = Type.tindex; // don't run semantic() on e | |
| 650 } | |
| 651 else if (tab.ty == TY.Tarray || tab.ty == TY.Tsarray) | |
| 652 { | |
| 653 /* Call: | |
| 654 * _aApply(aggr, flde) | |
| 655 */ | |
| 656 static char fntab[9][3] = | |
| 657 [ "cc","cw","cd", | |
| 658 "wc","cc","wd", | |
| 659 "dc","dw","dd" | |
| 660 ]; | |
| 661 char fdname[7+1+2+ dim.sizeof*3 + 1]; | |
| 662 int flag; | |
| 663 | |
| 664 switch (tn.ty) | |
| 665 { | |
| 666 case TY.Tchar: flag = 0; break; | |
| 667 case TY.Twchar: flag = 3; break; | |
| 668 case TY.Tdchar: flag = 6; break; | |
| 669 } | |
| 670 switch (tnv.ty) | |
| 671 { | |
| 672 case TY.Tchar: flag += 0; break; | |
| 673 case TY.Twchar: flag += 1; break; | |
| 674 case TY.Tdchar: flag += 2; break; | |
| 675 } | |
| 676 string r = (op == TOK.TOKforeach_reverse) ? "R" : ""; | |
| 73 | 677 int j = sprintf(fdname.ptr, "_aApply%.*s%.*s%zd".ptr, r, 2, fntab[flag].ptr, dim); |
| 0 | 678 assert(j < fdname.sizeof); |
| 135 | 679 FuncDeclaration fdapply = FuncDeclaration.genCfunc(Type.tindex, fdname[0..j].idup); |
| 0 | 680 |
| 681 ec = new VarExp(Loc(0), fdapply); | |
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682 auto exps = new Expressions(); |
| 0 | 683 if (tab.ty == TY.Tsarray) |
| 684 aggr = aggr.castTo(sc, tn.arrayOf()); | |
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685 exps.push(aggr); |
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686 exps.push(flde); |
| 0 | 687 e = new CallExp(loc, ec, exps); |
| 688 e.type = Type.tindex; // don't run semantic() on e | |
| 689 } | |
| 690 else if (tab.ty == TY.Tdelegate) | |
| 691 { | |
| 692 /* Call: | |
| 693 * aggr(flde) | |
| 694 */ | |
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695 auto exps = new Expressions(); |
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696 exps.push(flde); |
| 0 | 697 e = new CallExp(loc, aggr, exps); |
| 698 e = e.semantic(sc); | |
| 699 if (e.type != Type.tint32) | |
| 700 error("opApply() function for %s must return an int", tab.toChars()); | |
| 701 } | |
| 702 else | |
| 703 { | |
| 704 assert(tab.ty == TY.Tstruct || tab.ty == TY.Tclass); | |
| 135 | 705 auto exps = new Expressions(); |
| 706 if (!sapply) | |
| 707 sapply = search_function(cast(AggregateDeclaration)tab.toDsymbol(sc), idapply); | |
| 0 | 708 static if (false) { |
| 709 TemplateDeclaration td; | |
| 710 if (sapply && (td = sapply.isTemplateDeclaration()) !is null) | |
| 711 { | |
| 712 /* Call: | |
| 713 * aggr.apply!(fld)() | |
| 714 */ | |
| 715 Objects tiargs = new Objects(); | |
| 716 tiargs.push(cast(void*)fld); | |
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717 ec = new DotTemplateInstanceExp(loc, aggr, idapply, tiargs); |
| 0 | 718 } |
| 719 else | |
| 720 { | |
| 721 /* Call: | |
| 722 * aggr.apply(flde) | |
| 723 */ | |
| 724 ec = new DotIdExp(loc, aggr, idapply); | |
| 725 exps.push(cast(void*)flde); | |
| 726 } | |
| 727 } else { | |
| 728 ec = new DotIdExp(loc, aggr, idapply); | |
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729 exps.push(flde); |
| 0 | 730 } |
| 731 e = new CallExp(loc, ec, exps); | |
| 732 e = e.semantic(sc); | |
| 733 if (e.type != Type.tint32) { | |
| 734 error("opApply() function for %s must return an int", tab.toChars()); | |
| 735 } | |
| 736 } | |
| 737 | |
| 738 if (!cases.dim) | |
| 739 { | |
| 740 // Easy case, a clean exit from the loop | |
| 741 s = new ExpStatement(loc, e); | |
| 742 } | |
| 743 else | |
| 744 { // Construct a switch statement around the return value | |
| 745 // of the apply function. | |
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746 auto a2 = new Statements(); |
| 0 | 747 |
| 748 // default: break; takes care of cases 0 and 1 | |
| 749 s = new BreakStatement(Loc(0), null); | |
| 750 s = new DefaultStatement(Loc(0), s); | |
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751 a2.push(s); |
| 0 | 752 |
| 753 // cases 2... | |
| 754 for (int i = 0; i < cases.dim; i++) | |
| 755 { | |
| 756 s = cast(Statement)cases.data[i]; | |
| 757 s = new CaseStatement(Loc(0), new IntegerExp(i + 2), s); | |
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758 a2.push(s); |
| 0 | 759 } |
| 760 | |
| 761 s = new CompoundStatement(loc, a2); | |
| 762 s = new SwitchStatement(loc, e, s, false); | |
| 763 s = s.semantic(sc); | |
| 764 } | |
| 765 break; | |
| 766 } | |
| 767 | |
| 768 default: | |
| 769 error("foreach: %s is not an aggregate type", aggr.type.toChars()); | |
| 770 s = null; // error recovery | |
| 771 break; | |
| 772 } | |
| 773 | |
| 774 sc.noctor--; | |
| 775 sc.pop(); | |
| 776 return s; | |
| 777 } | |
| 778 | |
| 779 bool checkForArgTypes() | |
| 780 { | |
| 781 bool result = true; | |
| 782 | |
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783 foreach (arg; arguments) |
| 0 | 784 { |
| 785 if (!arg.type) | |
| 786 { | |
| 787 error("cannot infer type for %s", arg.ident.toChars()); | |
| 788 arg.type = Type.terror; | |
| 789 result = false; | |
| 790 } | |
| 791 } | |
| 792 return result; | |
| 793 } | |
| 794 | |
| 72 | 795 override bool hasBreak() |
| 0 | 796 { |
| 66 | 797 return true; |
| 0 | 798 } |
| 799 | |
| 72 | 800 override bool hasContinue() |
| 0 | 801 { |
| 66 | 802 return true; |
| 0 | 803 } |
| 804 | |
| 72 | 805 override bool usesEH() |
| 0 | 806 { |
| 66 | 807 return body_.usesEH(); |
| 0 | 808 } |
| 809 | |
| 72 | 810 override BE blockExit() |
| 0 | 811 { |
| 66 | 812 BE result = BEfallthru; |
| 813 | |
| 814 if (aggr.canThrow()) | |
| 815 result |= BEthrow; | |
| 816 | |
| 817 if (body_) | |
| 818 { | |
| 819 result |= body_.blockExit() & ~(BEbreak | BEcontinue); | |
| 820 } | |
| 821 return result; | |
| 0 | 822 } |
| 823 | |
| 72 | 824 override bool comeFrom() |
| 0 | 825 { |
| 66 | 826 if (body_) |
| 827 return body_.comeFrom(); | |
| 828 | |
| 829 return false; | |
| 0 | 830 } |
| 831 | |
| 72 | 832 override Expression interpret(InterState istate) |
| 0 | 833 { |
| 834 assert(false); | |
| 835 } | |
| 836 | |
| 72 | 837 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 838 { |
| 66 | 839 buf.writestring(Token.toChars(op)); |
| 840 buf.writestring(" ("); | |
| 841 for (int i = 0; i < arguments.dim; i++) | |
| 842 { | |
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843 auto a = arguments[i]; |
| 66 | 844 if (i) |
| 845 buf.writestring(", "); | |
| 846 if (a.storageClass & STCref) | |
| 847 buf.writestring((global.params.Dversion == 1) ? "inout " : "ref "); | |
| 848 if (a.type) | |
| 849 a.type.toCBuffer(buf, a.ident, hgs); | |
| 850 else | |
| 851 buf.writestring(a.ident.toChars()); | |
| 852 } | |
| 853 buf.writestring("; "); | |
| 854 aggr.toCBuffer(buf, hgs); | |
| 855 buf.writebyte(')'); | |
| 856 buf.writenl(); | |
| 857 buf.writebyte('{'); | |
| 858 buf.writenl(); | |
| 859 if (body_) | |
| 860 body_.toCBuffer(buf, hgs); | |
| 861 buf.writebyte('}'); | |
| 862 buf.writenl(); | |
| 0 | 863 } |
| 864 | |
| 72 | 865 override Statement inlineScan(InlineScanState* iss) |
| 0 | 866 { |
| 867 aggr = aggr.inlineScan(iss); | |
| 868 if (body_) | |
| 869 body_ = body_.inlineScan(iss); | |
| 870 return this; | |
| 871 } | |
| 872 | |
| 72 | 873 override void toIR(IRState* irs) |
| 0 | 874 { |
| 875 assert(false); | |
| 876 } | |
| 72 | 877 } |