Mercurial > projects > ddmd
annotate dmd/ForeachStatement.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 | 52188e7e3fb5 |
| 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 | |
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74 import dmd.DDMDExtensions; |
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75 |
| 0 | 76 class ForeachStatement : Statement |
| 77 { | |
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78 mixin insertMemberExtension!(typeof(this)); |
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79 |
| 0 | 80 TOK op; // TOKforeach or TOKforeach_reverse |
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81 Parameters arguments; // array of Argument*'s |
| 0 | 82 Expression aggr; |
| 83 Statement body_; | |
| 84 | |
| 85 VarDeclaration key; | |
| 86 VarDeclaration value; | |
| 87 | |
| 88 FuncDeclaration func; // function we're lexically in | |
| 89 | |
| 90 Array cases; // put breaks, continues, gotos and returns here | |
| 91 Array gotos; // forward referenced goto's go here | |
| 92 | |
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93 this(Loc loc, TOK op, Parameters arguments, Expression aggr, Statement body_) |
| 0 | 94 { |
| 178 | 95 register(); |
| 0 | 96 super(loc); |
| 97 | |
| 98 this.op = op; | |
| 99 this.arguments = arguments; | |
| 100 this.aggr = aggr; | |
| 101 this.body_ = body_; | |
| 102 | |
| 103 gotos = new Array(); | |
| 104 cases = new Array(); | |
| 105 } | |
| 106 | |
| 72 | 107 override Statement syntaxCopy() |
| 0 | 108 { |
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109 auto args = Parameter.arraySyntaxCopy(arguments); |
| 53 | 110 Expression exp = aggr.syntaxCopy(); |
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111 auto s = new ForeachStatement(loc, op, args, exp, |
| 53 | 112 body_ ? body_.syntaxCopy() : null); |
| 113 return s; | |
| 0 | 114 } |
| 115 | |
| 72 | 116 override Statement semantic(Scope sc) |
| 0 | 117 { |
| 118 //printf("ForeachStatement.semantic() %p\n", this); | |
| 119 ScopeDsymbol sym; | |
| 120 Statement s = this; | |
| 121 size_t dim = arguments.dim; | |
| 122 TypeAArray taa = null; | |
| 135 | 123 Dsymbol sapply = null; |
| 0 | 124 |
| 125 Type tn = null; | |
| 126 Type tnv = null; | |
| 127 | |
| 128 func = sc.func; | |
| 129 if (func.fes) | |
| 130 func = func.fes.func; | |
| 131 | |
| 132 aggr = aggr.semantic(sc); | |
| 133 aggr = resolveProperties(sc, aggr); | |
| 134 aggr = aggr.optimize(WANT.WANTvalue); | |
| 135 if (!aggr.type) | |
| 136 { | |
| 137 error("invalid foreach aggregate %s", aggr.toChars()); | |
| 138 return this; | |
| 139 } | |
| 140 | |
| 141 inferApplyArgTypes(op, arguments, aggr); | |
| 142 | |
| 143 /* Check for inference errors | |
| 144 */ | |
| 145 if (dim != arguments.dim) | |
| 146 { | |
| 147 //printf("dim = %d, arguments.dim = %d\n", dim, arguments.dim); | |
| 148 error("cannot uniquely infer foreach argument types"); | |
| 149 return this; | |
| 150 } | |
| 151 | |
| 152 Type tab = aggr.type.toBasetype(); | |
| 153 | |
| 154 if (tab.ty == TY.Ttuple) // don't generate new scope for tuple loops | |
| 155 { | |
| 156 if (dim < 1 || dim > 2) | |
| 157 { | |
| 158 error("only one (value) or two (key,value) arguments for tuple foreach"); | |
| 159 return s; | |
| 160 } | |
| 161 | |
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162 auto tuple = cast(TypeTuple)tab; |
| 0 | 163 Statements statements = new Statements(); |
| 164 //printf("aggr: op = %d, %s\n", aggr.op, aggr.toChars()); | |
| 165 size_t n; | |
| 166 TupleExp te = null; | |
| 167 if (aggr.op == TOK.TOKtuple) // expression tuple | |
| 168 { | |
| 169 te = cast(TupleExp)aggr; | |
| 170 n = te.exps.dim; | |
| 171 } | |
| 172 else if (aggr.op == TOK.TOKtype) // type tuple | |
| 173 { | |
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174 n = Parameter.dim(tuple.arguments); |
| 0 | 175 } |
| 176 else | |
| 177 assert(0); | |
| 178 | |
| 179 for (size_t j = 0; j < n; j++) | |
| 180 { | |
| 181 size_t k = (op == TOK.TOKforeach) ? j : n - 1 - j; | |
| 182 Expression e; | |
| 183 Type t; | |
| 184 if (te) | |
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185 e = te.exps[k]; |
| 0 | 186 else |
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187 t = Parameter.getNth(tuple.arguments, k).type; |
| 0 | 188 |
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189 auto arg = arguments[0]; |
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190 auto st = new Statements(); |
| 0 | 191 |
| 192 if (dim == 2) | |
| 193 { | |
| 194 // Declare key | |
| 195 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 196 error("no storage class for key %s", arg.ident.toChars()); | |
| 197 TY keyty = arg.type.ty; | |
| 198 if (keyty != TY.Tint32 && keyty != TY.Tuns32) | |
| 199 { | |
| 200 if (global.params.isX86_64) | |
| 201 { | |
| 202 if (keyty != TY.Tint64 && keyty != TY.Tuns64) | |
| 203 error("foreach: key type must be int or uint, long or ulong, not %s", arg.type.toChars()); | |
| 204 } | |
| 205 else | |
| 206 error("foreach: key type must be int or uint, not %s", arg.type.toChars()); | |
| 207 } | |
| 208 Initializer ie = new ExpInitializer(Loc(0), new IntegerExp(k)); | |
| 209 VarDeclaration var = new VarDeclaration(loc, arg.type, arg.ident, ie); | |
| 210 var.storage_class |= STC.STCmanifest; | |
| 211 DeclarationExp de = new DeclarationExp(loc, var); | |
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212 st.push(new ExpStatement(loc, de)); |
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213 arg = arguments[1]; // value |
| 0 | 214 } |
| 215 // Declare value | |
| 216 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 217 error("no storage class for value %s", arg.ident.toChars()); | |
| 218 Dsymbol var; | |
| 219 if (te) | |
| 220 { | |
| 221 Type tb = e.type.toBasetype(); | |
| 222 if ((tb.ty == TY.Tfunction || tb.ty == TY.Tsarray) && e.op == TOK.TOKvar) | |
| 223 { | |
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224 auto ve = cast(VarExp)e; |
| 0 | 225 var = new AliasDeclaration(loc, arg.ident, ve.var); |
| 226 } | |
| 227 else | |
| 228 { | |
| 229 arg.type = e.type; | |
| 230 Initializer ie = new ExpInitializer(Loc(0), e); | |
| 231 VarDeclaration v = new VarDeclaration(loc, arg.type, arg.ident, ie); | |
| 232 if (e.isConst()) | |
| 233 v.storage_class |= STC.STCconst; | |
| 234 | |
| 235 var = v; | |
| 236 } | |
| 237 } | |
| 238 else | |
| 239 { | |
| 240 var = new AliasDeclaration(loc, arg.ident, t); | |
| 241 } | |
| 242 | |
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243 auto de = new DeclarationExp(loc, var); |
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244 st.push(new ExpStatement(loc, de)); |
| 0 | 245 |
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246 st.push(body_.syntaxCopy()); |
| 0 | 247 s = new CompoundStatement(loc, st); |
| 248 s = new ScopeStatement(loc, s); | |
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249 statements.push(s); |
| 0 | 250 } |
| 251 | |
| 252 s = new UnrolledLoopStatement(loc, statements); | |
| 253 s = s.semantic(sc); | |
| 254 return s; | |
| 255 } | |
| 256 | |
| 257 sym = new ScopeDsymbol(); | |
| 258 sym.parent = sc.scopesym; | |
| 259 sc = sc.push(sym); | |
| 260 | |
| 261 sc.noctor++; | |
| 262 | |
| 96 | 263 Lagain: |
| 135 | 264 Identifier idapply = (op == TOK.TOKforeach_reverse) |
| 265 ? Id.applyReverse : Id.apply; | |
| 266 sapply = null; | |
| 0 | 267 switch (tab.ty) |
| 268 { | |
| 269 case TY.Tarray: | |
| 270 case TY.Tsarray: | |
| 271 if (!checkForArgTypes()) | |
| 272 return this; | |
| 273 | |
| 274 if (dim < 1 || dim > 2) | |
| 275 { | |
| 276 error("only one or two arguments for array foreach"); | |
| 277 break; | |
| 278 } | |
| 279 | |
| 280 /* Look for special case of parsing char types out of char type | |
| 281 * array. | |
| 282 */ | |
| 283 tn = tab.nextOf().toBasetype(); | |
| 284 if (tn.ty == TY.Tchar || tn.ty == TY.Twchar || tn.ty == TY.Tdchar) | |
| 285 { | |
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286 Parameter arg; |
| 0 | 287 |
| 288 int i = (dim == 1) ? 0 : 1; // index of value | |
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289 arg = arguments[i]; |
| 0 | 290 arg.type = arg.type.semantic(loc, sc); |
| 291 tnv = arg.type.toBasetype(); | |
| 292 if (tnv.ty != tn.ty && (tnv.ty == TY.Tchar || tnv.ty == TY.Twchar || tnv.ty == TY.Tdchar)) | |
| 293 { | |
| 294 if (arg.storageClass & STC.STCref) | |
| 295 error("foreach: value of UTF conversion cannot be ref"); | |
| 296 if (dim == 2) | |
| 297 { | |
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298 arg = arguments[0]; |
| 0 | 299 if (arg.storageClass & STC.STCref) |
| 300 error("foreach: key cannot be ref"); | |
| 301 } | |
| 302 goto Lapply; | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 for (size_t i = 0; i < dim; i++) | |
| 307 { | |
| 308 // Declare args | |
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309 auto arg = arguments[i]; |
| 0 | 310 Type argtype = arg.type.semantic(loc, sc); |
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311 auto var = new VarDeclaration(loc, argtype, arg.ident, null); |
| 0 | 312 var.storage_class |= STC.STCforeach; |
| 313 var.storage_class |= arg.storageClass & (STC.STCin | STC.STCout | STC.STCref | STC.STC_TYPECTOR); | |
| 314 if (var.storage_class & (STC.STCref | STC.STCout)) | |
| 315 var.storage_class |= STC.STCnodtor; | |
| 316 | |
| 317 if (dim == 2 && i == 0) | |
| 318 { | |
| 319 key = var; | |
| 320 //var.storage_class |= STCfinal; | |
| 321 } | |
| 322 else | |
| 323 { | |
| 324 value = var; | |
| 325 /* Reference to immutable data should be marked as const | |
| 326 */ | |
| 327 if (var.storage_class & STC.STCref && !tn.isMutable()) | |
| 328 { | |
| 329 var.storage_class |= STC.STCconst; | |
| 330 } | |
| 331 } | |
| 96 | 332 static if (false) |
| 333 { | |
| 0 | 334 DeclarationExp de = new DeclarationExp(loc, var); |
| 335 de.semantic(sc); | |
| 336 } | |
| 337 } | |
| 338 | |
| 96 | 339 static if (true) |
| 340 { | |
| 0 | 341 { |
| 342 /* Convert to a ForStatement | |
| 343 * foreach (key, value; a) body => | |
| 344 * for (T[] tmp = a[], size_t key; key < tmp.length; ++key) | |
| 345 * { T value = tmp[k]; body } | |
| 346 * | |
| 347 * foreach_reverse (key, value; a) body => | |
| 348 * for (T[] tmp = a[], size_t key = tmp.length; key--; ) | |
| 349 * { T value = tmp[k]; body } | |
| 350 */ | |
| 351 Identifier id = Lexer.uniqueId("__aggr"); | |
| 352 ExpInitializer ie = new ExpInitializer(loc, new SliceExp(loc, aggr, null, null)); | |
| 179 | 353 VarDeclaration tmp = new VarDeclaration(loc, tab.nextOf().arrayOf(), id, ie); |
| 0 | 354 |
| 355 Expression tmp_length = new DotIdExp(loc, new VarExp(loc, tmp), Id.length); | |
| 356 | |
| 357 if (!key) | |
| 358 { | |
| 359 Identifier id2 = Lexer.uniqueId("__key"); | |
| 360 key = new VarDeclaration(loc, Type.tsize_t, id2, null); | |
| 361 } | |
| 362 | |
| 363 if (op == TOK.TOKforeach_reverse) | |
| 364 key.init = new ExpInitializer(loc, tmp_length); | |
| 365 else | |
| 366 key.init = new ExpInitializer(loc, new IntegerExp(0)); | |
| 367 | |
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368 auto cs = new Statements(); |
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369 cs.push(new DeclarationStatement(loc, new DeclarationExp(loc, tmp))); |
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370 cs.push(new DeclarationStatement(loc, new DeclarationExp(loc, key))); |
| 0 | 371 Statement forinit = new CompoundDeclarationStatement(loc, cs); |
| 372 | |
| 373 Expression cond; | |
| 374 if (op == TOK.TOKforeach_reverse) | |
| 375 // key-- | |
| 376 cond = new PostExp(TOK.TOKminusminus, loc, new VarExp(loc, key)); | |
| 377 else | |
| 378 // key < tmp.length | |
| 379 cond = new CmpExp(TOK.TOKlt, loc, new VarExp(loc, key), tmp_length); | |
| 380 | |
| 381 Expression increment = null; | |
| 382 if (op == TOK.TOKforeach) | |
| 383 // key += 1 | |
| 384 increment = new AddAssignExp(loc, new VarExp(loc, key), new IntegerExp(1)); | |
| 385 | |
| 386 // T value = tmp[key]; | |
| 387 value.init = new ExpInitializer(loc, new IndexExp(loc, new VarExp(loc, tmp), new VarExp(loc, key))); | |
| 388 Statement ds = new DeclarationStatement(loc, new DeclarationExp(loc, value)); | |
| 389 | |
| 390 body_ = new CompoundStatement(loc, ds, body_); | |
| 391 | |
| 392 ForStatement fs = new ForStatement(loc, forinit, cond, increment, body_); | |
| 393 s = fs.semantic(sc); | |
| 394 break; | |
| 395 } | |
| 396 } else { | |
| 397 if (tab.nextOf().implicitConvTo(value.type) < MATCH.MATCHconst) | |
| 398 { | |
| 399 if (aggr.op == TOK.TOKstring) | |
| 400 aggr = aggr.implicitCastTo(sc, value.type.arrayOf()); | |
| 401 else | |
| 402 error("foreach: %s is not an array of %s", | |
| 403 tab.toChars(), value.type.toChars()); | |
| 404 } | |
| 405 | |
| 406 if (key) | |
| 407 { | |
| 408 if (key.type.ty != Tint32 && key.type.ty != Tuns32) | |
| 409 { | |
| 410 if (global.params.isX86_64) | |
| 411 { | |
| 412 if (key.type.ty != Tint64 && key.type.ty != Tuns64) | |
| 413 error("foreach: key type must be int or uint, long or ulong, not %s", key.type.toChars()); | |
| 414 } | |
| 415 else | |
| 416 error("foreach: key type must be int or uint, not %s", key.type.toChars()); | |
| 417 } | |
| 418 | |
| 419 if (key.storage_class & (STCout | STCref)) | |
| 420 error("foreach: key cannot be out or ref"); | |
| 421 } | |
| 422 | |
| 423 sc.sbreak = this; | |
| 424 sc.scontinue = this; | |
| 425 body_ = body_.semantic(sc); | |
| 426 break; | |
| 427 } | |
| 428 | |
| 429 case TY.Taarray: | |
| 430 if (!checkForArgTypes()) | |
| 431 return this; | |
| 432 | |
| 433 taa = cast(TypeAArray)tab; | |
| 434 if (dim < 1 || dim > 2) | |
| 435 { | |
| 436 error("only one or two arguments for associative array foreach"); | |
| 437 break; | |
| 438 } | |
| 96 | 439 version(SARRAYVALUE) |
| 440 { | |
| 441 /* This only works if Key or Value is a static array. | |
| 442 */ | |
| 443 tab = taa.getImpl().type; | |
| 444 goto Lagain; | |
| 445 } | |
| 446 else | |
| 447 { | |
| 0 | 448 if (op == TOK.TOKforeach_reverse) |
| 449 { | |
| 450 error("no reverse iteration on associative arrays"); | |
| 451 } | |
| 452 goto Lapply; | |
| 96 | 453 } |
| 0 | 454 case TY.Tclass: |
| 455 case TY.Tstruct: | |
| 456 version (DMDV2) { | |
| 135 | 457 /* Prefer using opApply, if it exists |
| 458 */ | |
| 459 if (dim != 1) // only one argument allowed with ranges | |
| 460 goto Lapply; | |
| 461 | |
| 462 sapply = search_function(cast(AggregateDeclaration)tab.toDsymbol(sc), idapply); | |
| 463 if (sapply) | |
| 464 goto Lapply; | |
| 465 | |
| 0 | 466 { /* Look for range iteration, i.e. the properties |
| 467 * .empty, .next, .retreat, .head and .rear | |
| 468 * foreach (e; aggr) { ... } | |
| 469 * translates to: | |
| 470 * for (auto __r = aggr[]; !__r.empty; __r.next) | |
| 471 * { auto e = __r.head; | |
| 472 * ... | |
| 473 * } | |
| 474 */ | |
| 475 AggregateDeclaration ad = (tab.ty == TY.Tclass) | |
| 476 ? cast(AggregateDeclaration)(cast(TypeClass)tab).sym | |
| 477 : cast(AggregateDeclaration)(cast(TypeStruct)tab).sym; | |
| 478 | |
| 479 Identifier idhead; | |
| 480 Identifier idnext; | |
| 481 if (op == TOK.TOKforeach) | |
| 482 { | |
| 483 idhead = Id.Fhead; | |
| 484 idnext = Id.Fnext; | |
| 485 } | |
| 486 else | |
| 487 { | |
| 488 idhead = Id.Ftoe; | |
| 489 idnext = Id.Fretreat; | |
| 490 } | |
| 491 | |
| 492 Dsymbol shead = search_function(ad, idhead); | |
| 493 if (!shead) | |
| 494 goto Lapply; | |
| 495 | |
| 496 /* Generate a temporary __r and initialize it with the aggregate. | |
| 497 */ | |
| 498 Identifier id = Identifier.generateId("__r"); | |
| 499 Expression rinit = new SliceExp(loc, aggr, null, null); | |
| 500 rinit = rinit.trySemantic(sc); | |
| 501 if (!rinit) // if application of [] failed | |
| 502 rinit = aggr; | |
| 503 | |
| 504 VarDeclaration r = new VarDeclaration(loc, null, id, new ExpInitializer(loc, rinit)); | |
| 505 | |
| 506 // r.semantic(sc); | |
| 507 //printf("r: %s, init: %s\n", r.toChars(), r.init.toChars()); | |
| 508 Statement init = new DeclarationStatement(loc, r); | |
| 509 //printf("init: %s\n", init.toChars()); | |
| 510 | |
| 511 // !__r.empty | |
| 512 Expression e = new VarExp(loc, r); | |
| 513 e = new DotIdExp(loc, e, Id.Fempty); | |
| 514 Expression condition = new NotExp(loc, e); | |
| 515 | |
| 516 // __r.next | |
| 517 e = new VarExp(loc, r); | |
| 518 Expression increment = new DotIdExp(loc, e, idnext); | |
| 519 | |
| 520 /* Declaration statement for e: | |
| 521 * auto e = __r.idhead; | |
| 522 */ | |
| 523 e = new VarExp(loc, r); | |
| 524 Expression einit = new DotIdExp(loc, e, idhead); | |
| 525 // einit = einit.semantic(sc); | |
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526 auto arg = arguments[0]; |
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527 auto ve = new VarDeclaration(loc, arg.type, arg.ident, new ExpInitializer(loc, einit)); |
| 0 | 528 ve.storage_class |= STC.STCforeach; |
| 529 ve.storage_class |= arg.storageClass & (STC.STCin | STC.STCout | STC.STCref | STC.STC_TYPECTOR); | |
| 530 | |
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531 auto de = new DeclarationExp(loc, ve); |
| 0 | 532 |
| 533 Statement body2 = new CompoundStatement(loc, new DeclarationStatement(loc, de), this.body_); | |
| 534 s = new ForStatement(loc, init, condition, increment, body2); | |
| 535 | |
| 536 static if (false) { | |
| 537 printf("init: %s\n", init.toChars()); | |
| 538 printf("condition: %s\n", condition.toChars()); | |
| 539 printf("increment: %s\n", increment.toChars()); | |
| 540 printf("body: %s\n", body2.toChars()); | |
| 541 } | |
| 542 s = s.semantic(sc); | |
| 543 break; | |
| 544 } | |
| 545 } | |
| 546 case TY.Tdelegate: | |
| 547 Lapply: | |
| 548 { | |
| 549 Expression ec; | |
| 550 Expression e; | |
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551 Parameter a; |
| 0 | 552 |
| 553 if (!checkForArgTypes()) | |
| 554 { | |
| 555 body_ = body_.semantic(sc); | |
| 556 return this; | |
| 557 } | |
| 558 | |
| 135 | 559 Type tret = func.type.nextOf(); |
| 0 | 560 |
| 561 // Need a variable to hold value from any return statements in body. | |
| 562 if (!sc.func.vresult && tret && tret != Type.tvoid) | |
| 563 { | |
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564 auto v = new VarDeclaration(loc, tret, Id.result, null); |
| 0 | 565 v.noauto = true; |
| 566 v.semantic(sc); | |
| 567 if (!sc.insert(v)) | |
| 568 assert(0); | |
| 569 | |
| 570 v.parent = sc.func; | |
| 571 sc.func.vresult = v; | |
| 572 } | |
| 573 | |
| 574 /* Turn body into the function literal: | |
| 575 * int delegate(ref T arg) { body } | |
| 576 */ | |
| 135 | 577 auto args = new Parameters(); |
| 0 | 578 for (size_t i = 0; i < dim; i++) |
| 579 { | |
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580 auto arg = arguments[i]; |
| 135 | 581 Identifier id; |
| 0 | 582 |
| 583 arg.type = arg.type.semantic(loc, sc); | |
| 584 if (arg.storageClass & STC.STCref) | |
| 585 id = arg.ident; | |
| 586 else | |
| 587 { // Make a copy of the ref argument so it isn't | |
| 588 // a reference. | |
| 589 id = Lexer.uniqueId("__applyArg", i); | |
| 590 | |
| 135 | 591 Initializer ie = new ExpInitializer(Loc(0), new IdentifierExp(Loc(0), id)); |
| 592 auto v = new VarDeclaration(Loc(0), arg.type, arg.ident, ie); | |
| 0 | 593 s = new DeclarationStatement(Loc(0), v); |
| 594 body_ = new CompoundStatement(loc, s, body_); | |
| 595 } | |
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596 a = new Parameter(STC.STCref, arg.type, id, null); |
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597 args.push(a); |
| 0 | 598 } |
| 135 | 599 Type t = new TypeFunction(args, Type.tint32, 0, LINK.LINKd); |
| 600 FuncLiteralDeclaration fld = new FuncLiteralDeclaration(loc, Loc(0), t, TOK.TOKdelegate, this); | |
| 0 | 601 fld.fbody = body_; |
| 135 | 602 Expression flde = new FuncExp(loc, fld); |
| 0 | 603 flde = flde.semantic(sc); |
| 604 fld.tookAddressOf = 0; | |
| 605 | |
| 606 // Resolve any forward referenced goto's | |
| 135 | 607 for (size_t i = 0; i < gotos.dim; i++) |
| 0 | 608 { |
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609 auto cs = cast(CompoundStatement)gotos.data[i]; |
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610 auto gs = cast(GotoStatement)cs.statements[0]; |
| 0 | 611 |
| 612 if (!gs.label.statement) | |
| 613 { | |
| 614 // 'Promote' it to this scope, and replace with a return | |
| 615 cases.push(cast(void*)gs); | |
| 616 s = new ReturnStatement(Loc(0), new IntegerExp(cases.dim + 1)); | |
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617 cs.statements[0] = s; |
| 0 | 618 } |
| 619 } | |
| 620 | |
| 621 if (tab.ty == TY.Taarray) | |
| 622 { | |
| 623 // Check types | |
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624 auto arg = arguments[0]; |
| 0 | 625 if (dim == 2) |
| 626 { | |
| 627 if (arg.storageClass & STC.STCref) | |
| 628 error("foreach: index cannot be ref"); | |
| 629 if (!arg.type.equals(taa.index)) | |
| 630 error("foreach: index must be type %s, not %s", taa.index.toChars(), arg.type.toChars()); | |
| 631 | |
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632 arg = arguments[1]; |
| 0 | 633 } |
| 634 if (!arg.type.equals(taa.nextOf())) | |
| 635 error("foreach: value must be type %s, not %s", taa.nextOf().toChars(), arg.type.toChars()); | |
| 636 | |
| 637 /* Call: | |
| 638 * _aaApply(aggr, keysize, flde) | |
| 639 */ | |
| 135 | 640 FuncDeclaration fdapply; |
| 0 | 641 if (dim == 2) |
| 642 fdapply = FuncDeclaration.genCfunc(Type.tindex, "_aaApply2"); | |
| 643 else | |
| 644 fdapply = FuncDeclaration.genCfunc(Type.tindex, "_aaApply"); | |
| 645 | |
| 646 ec = new VarExp(Loc(0), fdapply); | |
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647 auto exps = new Expressions(); |
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648 exps.push(aggr); |
| 0 | 649 size_t keysize = cast(uint)taa.index.size(); |
| 650 keysize = (keysize + (PTRSIZE-1)) & ~(PTRSIZE-1); | |
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651 exps.push(new IntegerExp(Loc(0), keysize, Type.tsize_t)); |
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652 exps.push(flde); |
| 0 | 653 e = new CallExp(loc, ec, exps); |
| 654 e.type = Type.tindex; // don't run semantic() on e | |
| 655 } | |
| 656 else if (tab.ty == TY.Tarray || tab.ty == TY.Tsarray) | |
| 657 { | |
| 658 /* Call: | |
| 659 * _aApply(aggr, flde) | |
| 660 */ | |
| 175 | 661 enum char fntab[9][3] = |
| 0 | 662 [ "cc","cw","cd", |
| 663 "wc","cc","wd", | |
| 664 "dc","dw","dd" | |
| 665 ]; | |
| 666 char fdname[7+1+2+ dim.sizeof*3 + 1]; | |
| 667 int flag; | |
| 668 | |
| 669 switch (tn.ty) | |
| 670 { | |
| 671 case TY.Tchar: flag = 0; break; | |
| 672 case TY.Twchar: flag = 3; break; | |
| 673 case TY.Tdchar: flag = 6; break; | |
| 674 } | |
| 675 switch (tnv.ty) | |
| 676 { | |
| 677 case TY.Tchar: flag += 0; break; | |
| 678 case TY.Twchar: flag += 1; break; | |
| 679 case TY.Tdchar: flag += 2; break; | |
| 680 } | |
| 681 string r = (op == TOK.TOKforeach_reverse) ? "R" : ""; | |
| 73 | 682 int j = sprintf(fdname.ptr, "_aApply%.*s%.*s%zd".ptr, r, 2, fntab[flag].ptr, dim); |
| 0 | 683 assert(j < fdname.sizeof); |
| 135 | 684 FuncDeclaration fdapply = FuncDeclaration.genCfunc(Type.tindex, fdname[0..j].idup); |
| 0 | 685 |
| 686 ec = new VarExp(Loc(0), fdapply); | |
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687 auto exps = new Expressions(); |
| 0 | 688 if (tab.ty == TY.Tsarray) |
| 689 aggr = aggr.castTo(sc, tn.arrayOf()); | |
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690 exps.push(aggr); |
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691 exps.push(flde); |
| 0 | 692 e = new CallExp(loc, ec, exps); |
| 693 e.type = Type.tindex; // don't run semantic() on e | |
| 694 } | |
| 695 else if (tab.ty == TY.Tdelegate) | |
| 696 { | |
| 697 /* Call: | |
| 698 * aggr(flde) | |
| 699 */ | |
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700 auto exps = new Expressions(); |
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701 exps.push(flde); |
| 0 | 702 e = new CallExp(loc, aggr, exps); |
| 703 e = e.semantic(sc); | |
| 704 if (e.type != Type.tint32) | |
| 705 error("opApply() function for %s must return an int", tab.toChars()); | |
| 706 } | |
| 707 else | |
| 708 { | |
| 709 assert(tab.ty == TY.Tstruct || tab.ty == TY.Tclass); | |
| 135 | 710 auto exps = new Expressions(); |
| 711 if (!sapply) | |
| 712 sapply = search_function(cast(AggregateDeclaration)tab.toDsymbol(sc), idapply); | |
| 0 | 713 static if (false) { |
| 714 TemplateDeclaration td; | |
| 715 if (sapply && (td = sapply.isTemplateDeclaration()) !is null) | |
| 716 { | |
| 717 /* Call: | |
| 718 * aggr.apply!(fld)() | |
| 719 */ | |
| 720 Objects tiargs = new Objects(); | |
| 721 tiargs.push(cast(void*)fld); | |
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722 ec = new DotTemplateInstanceExp(loc, aggr, idapply, tiargs); |
| 0 | 723 } |
| 724 else | |
| 725 { | |
| 726 /* Call: | |
| 727 * aggr.apply(flde) | |
| 728 */ | |
| 729 ec = new DotIdExp(loc, aggr, idapply); | |
| 730 exps.push(cast(void*)flde); | |
| 731 } | |
| 732 } else { | |
| 733 ec = new DotIdExp(loc, aggr, idapply); | |
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734 exps.push(flde); |
| 0 | 735 } |
| 736 e = new CallExp(loc, ec, exps); | |
| 737 e = e.semantic(sc); | |
| 738 if (e.type != Type.tint32) { | |
| 739 error("opApply() function for %s must return an int", tab.toChars()); | |
| 740 } | |
| 741 } | |
| 742 | |
| 743 if (!cases.dim) | |
| 744 { | |
| 745 // Easy case, a clean exit from the loop | |
| 746 s = new ExpStatement(loc, e); | |
| 747 } | |
| 748 else | |
| 749 { // Construct a switch statement around the return value | |
| 750 // of the apply function. | |
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751 auto a2 = new Statements(); |
| 0 | 752 |
| 753 // default: break; takes care of cases 0 and 1 | |
| 754 s = new BreakStatement(Loc(0), null); | |
| 755 s = new DefaultStatement(Loc(0), s); | |
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756 a2.push(s); |
| 0 | 757 |
| 758 // cases 2... | |
| 759 for (int i = 0; i < cases.dim; i++) | |
| 760 { | |
| 761 s = cast(Statement)cases.data[i]; | |
| 762 s = new CaseStatement(Loc(0), new IntegerExp(i + 2), s); | |
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763 a2.push(s); |
| 0 | 764 } |
| 765 | |
| 766 s = new CompoundStatement(loc, a2); | |
| 767 s = new SwitchStatement(loc, e, s, false); | |
| 768 s = s.semantic(sc); | |
| 769 } | |
| 770 break; | |
| 771 } | |
| 772 | |
| 773 default: | |
| 774 error("foreach: %s is not an aggregate type", aggr.type.toChars()); | |
| 775 s = null; // error recovery | |
| 776 break; | |
| 777 } | |
| 778 | |
| 779 sc.noctor--; | |
| 780 sc.pop(); | |
| 781 return s; | |
| 782 } | |
| 783 | |
| 784 bool checkForArgTypes() | |
| 785 { | |
| 786 bool result = true; | |
| 787 | |
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788 foreach (arg; arguments) |
| 0 | 789 { |
| 790 if (!arg.type) | |
| 791 { | |
| 792 error("cannot infer type for %s", arg.ident.toChars()); | |
| 793 arg.type = Type.terror; | |
| 794 result = false; | |
| 795 } | |
| 796 } | |
| 797 return result; | |
| 798 } | |
| 799 | |
| 72 | 800 override bool hasBreak() |
| 0 | 801 { |
| 66 | 802 return true; |
| 0 | 803 } |
| 804 | |
| 72 | 805 override bool hasContinue() |
| 0 | 806 { |
| 66 | 807 return true; |
| 0 | 808 } |
| 809 | |
| 72 | 810 override bool usesEH() |
| 0 | 811 { |
| 66 | 812 return body_.usesEH(); |
| 0 | 813 } |
| 814 | |
| 72 | 815 override BE blockExit() |
| 0 | 816 { |
| 66 | 817 BE result = BEfallthru; |
| 818 | |
| 819 if (aggr.canThrow()) | |
| 820 result |= BEthrow; | |
| 821 | |
| 822 if (body_) | |
| 823 { | |
| 824 result |= body_.blockExit() & ~(BEbreak | BEcontinue); | |
| 825 } | |
| 826 return result; | |
| 0 | 827 } |
| 828 | |
| 72 | 829 override bool comeFrom() |
| 0 | 830 { |
| 66 | 831 if (body_) |
| 832 return body_.comeFrom(); | |
| 833 | |
| 834 return false; | |
| 0 | 835 } |
| 836 | |
| 72 | 837 override Expression interpret(InterState istate) |
| 0 | 838 { |
| 839 assert(false); | |
| 840 } | |
| 841 | |
| 72 | 842 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 843 { |
| 66 | 844 buf.writestring(Token.toChars(op)); |
| 845 buf.writestring(" ("); | |
| 846 for (int i = 0; i < arguments.dim; i++) | |
| 847 { | |
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848 auto a = arguments[i]; |
| 66 | 849 if (i) |
| 850 buf.writestring(", "); | |
| 851 if (a.storageClass & STCref) | |
| 852 buf.writestring((global.params.Dversion == 1) ? "inout " : "ref "); | |
| 853 if (a.type) | |
| 854 a.type.toCBuffer(buf, a.ident, hgs); | |
| 855 else | |
| 856 buf.writestring(a.ident.toChars()); | |
| 857 } | |
| 858 buf.writestring("; "); | |
| 859 aggr.toCBuffer(buf, hgs); | |
| 860 buf.writebyte(')'); | |
| 861 buf.writenl(); | |
| 862 buf.writebyte('{'); | |
| 863 buf.writenl(); | |
| 864 if (body_) | |
| 865 body_.toCBuffer(buf, hgs); | |
| 866 buf.writebyte('}'); | |
| 867 buf.writenl(); | |
| 0 | 868 } |
| 869 | |
| 72 | 870 override Statement inlineScan(InlineScanState* iss) |
| 0 | 871 { |
| 872 aggr = aggr.inlineScan(iss); | |
| 873 if (body_) | |
| 874 body_ = body_.inlineScan(iss); | |
| 875 return this; | |
| 876 } | |
| 877 | |
| 72 | 878 override void toIR(IRState* irs) |
| 0 | 879 { |
| 880 assert(false); | |
| 881 } | |
| 72 | 882 } |