Mercurial > projects > ddmd
annotate dmd/TypeFunction.d @ 135:af1bebfd96a4 dmd2037
dmd 2.038
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Mon, 13 Sep 2010 22:19:42 +0100 |
| parents | c494af1dba80 |
| children | 95b3ed3cddd5 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.TypeFunction; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.TypeNext; |
| 5 import dmd.TypeSArray; | |
| 6 import dmd.TypeArray; | |
| 123 | 7 import dmd.TemplateTupleParameter; |
| 0 | 8 import dmd.ArrayTypes; |
| 9 import dmd.LINK; | |
| 10 import dmd.StructDeclaration; | |
| 11 import dmd.TypeStruct; | |
| 12 import dmd.Global; | |
| 13 import dmd.STC; | |
| 14 import dmd.MOD; | |
| 73 | 15 import dmd.PROT; |
| 123 | 16 import dmd.TypeIdentifier; |
| 17 import dmd.TemplateParameter; | |
| 129 | 18 import dmd.TypeInfoFunctionDeclaration; |
| 123 | 19 import dmd.Tuple; |
| 0 | 20 import dmd.Type; |
| 21 import dmd.Loc; | |
| 22 import dmd.Scope; | |
| 23 import dmd.Identifier; | |
| 24 import dmd.OutBuffer; | |
| 25 import dmd.HdrGenState; | |
| 26 import dmd.CppMangleState; | |
| 27 import dmd.TypeInfoDeclaration; | |
| 28 import dmd.MATCH; | |
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29 import dmd.Parameter; |
| 0 | 30 import dmd.Expression; |
| 31 import dmd.RET; | |
| 32 import dmd.TY; | |
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33 import dmd.TRUST; |
| 0 | 34 import dmd.Util; |
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35 import dmd.FuncDeclaration; |
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36 import dmd.Dsymbol; |
| 135 | 37 import dmd.TypeTuple; |
| 123 | 38 import dmd.TemplateInstance : isTuple; |
| 0 | 39 |
| 40 import dmd.backend.TYPE; | |
| 41 import dmd.backend.PARAM; | |
| 42 import dmd.backend.Util; | |
| 43 import dmd.backend.TYM; | |
| 44 import dmd.backend.TF; | |
| 45 import dmd.backend.mTY; | |
| 46 | |
| 47 import core.stdc.stdlib; | |
| 48 import core.stdc.string; | |
| 49 | |
| 129 | 50 import std.stdio; |
| 51 | |
| 0 | 52 class TypeFunction : TypeNext |
| 53 { | |
| 54 // .next is the return type | |
| 55 | |
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56 Parameters parameters; // function parameters |
| 0 | 57 int varargs; // 1: T t, ...) style for variable number of arguments |
| 58 // 2: T t ...) style for variable number of arguments | |
| 59 bool isnothrow; // true: nothrow | |
| 60 bool ispure; // true: pure | |
| 61 bool isproperty; // can be called without parentheses | |
| 62 bool isref; // true: returns a reference | |
| 63 LINK linkage; // calling convention | |
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64 TRUST trust; // level of trust |
| 135 | 65 Expressions fargs; // function arguments |
| 0 | 66 |
| 67 int inuse; | |
| 68 | |
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69 this(Parameters parameters, Type treturn, int varargs, LINK linkage) |
| 0 | 70 { |
| 71 super(TY.Tfunction, treturn); | |
| 72 | |
| 73 //if (!treturn) *(char*)0=0; | |
| 74 // assert(treturn); | |
| 75 assert(0 <= varargs && varargs <= 2); | |
| 76 this.parameters = parameters; | |
| 77 this.varargs = varargs; | |
| 78 this.linkage = linkage; | |
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79 this.trust = TRUSTdefault; |
| 0 | 80 } |
| 81 | |
| 72 | 82 override Type syntaxCopy() |
| 0 | 83 { |
| 84 Type treturn = next ? next.syntaxCopy() : null; | |
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85 auto params = Parameter.arraySyntaxCopy(parameters); |
| 0 | 86 TypeFunction t = new TypeFunction(params, treturn, varargs, linkage); |
| 87 t.mod = mod; | |
| 88 t.isnothrow = isnothrow; | |
| 89 t.ispure = ispure; | |
| 90 t.isproperty = isproperty; | |
| 91 t.isref = isref; | |
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92 t.trust = trust; |
| 135 | 93 t.fargs = fargs; |
| 0 | 94 |
| 95 return t; | |
| 96 } | |
| 97 | |
| 98 version (DumbClone) { | |
| 99 } else { | |
| 100 final TypeFunction cloneTo(TypeFunction t) | |
| 101 { | |
| 102 super.cloneTo(t); | |
| 103 | |
| 104 // these 3 should be set by ctor | |
| 105 assert(t.parameters is null); | |
| 106 assert(t.varargs == varargs); | |
| 107 assert(t.linkage == linkage); | |
| 108 | |
| 109 t.isnothrow = isnothrow; | |
| 110 t.ispure = ispure; | |
| 111 t.isproperty = isproperty; | |
| 112 t.isref = isref; | |
| 113 t.inuse = inuse; | |
| 114 | |
| 115 if (parameters) | |
| 116 { | |
| 117 t.parameters = parameters.copy(); | |
| 129 | 118 foreach (arg; parameters) |
| 0 | 119 { |
| 120 Argument cpy = arg.clone(); | |
| 129 | 121 t.parameters[i] = cpy; |
| 0 | 122 } |
| 123 } | |
| 124 | |
| 125 return t; | |
| 126 } | |
| 127 | |
| 128 TypeFunction clone() | |
| 129 { | |
| 129 | 130 assert(this.classinfo is TypeFunction.classinfo); |
| 0 | 131 return cloneTo(new TypeFunction(null, next, varargs, linkage)); |
| 132 } | |
| 133 } | |
| 72 | 134 override Type semantic(Loc loc, Scope sc) |
| 0 | 135 { |
| 136 if (deco) // if semantic() already run | |
| 137 { | |
| 138 //printf("already done\n"); | |
| 139 return this; | |
| 140 } | |
| 141 //printf("TypeFunction.semantic() this = %p\n", this); | |
| 135 | 142 //printf("TypeFunction::semantic() %s, sc->stc = %llx, fargs = %p\n", toChars(), sc->stc, fargs); |
| 0 | 143 |
| 144 /* Copy in order to not mess up original. | |
| 145 * This can produce redundant copies if inferring return type, | |
| 146 * as semantic() will get called again on this. | |
| 147 */ | |
| 148 | |
| 129 | 149 TypeFunction tf = cloneThis(this); |
| 0 | 150 |
| 151 if (sc.stc & STC.STCpure) | |
| 152 tf.ispure = true; | |
| 153 if (sc.stc & STC.STCnothrow) | |
| 154 tf.isnothrow = true; | |
| 155 if (sc.stc & STC.STCref) | |
| 156 tf.isref = true; | |
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157 if (sc.stc & STCsafe) |
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158 tf.trust = TRUST.TRUSTsafe; |
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159 if (sc.stc & STCtrusted) |
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160 tf.trust = TRUST.TRUSTtrusted; |
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161 if (sc.stc & STCproperty) |
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162 tf.isproperty = true; |
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163 |
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164 tf.linkage = sc.linkage; |
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165 |
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166 /* If the parent is @safe, then this function defaults to safe |
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167 * too. |
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168 */ |
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169 if (tf.trust == TRUST.TRUSTdefault) |
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170 for (Dsymbol p = sc.func; p; p = p.toParent2()) |
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171 { FuncDeclaration fd = p.isFuncDeclaration(); |
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172 if (fd) |
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173 { |
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174 if (fd.isSafe()) |
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175 tf.trust = TRUST.TRUSTsafe; // default to @safe |
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176 break; |
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177 } |
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178 } |
| 0 | 179 |
| 135 | 180 bool wildreturn = false; |
| 0 | 181 if (tf.next) |
| 182 { | |
| 183 tf.next = tf.next.semantic(loc,sc); | |
| 96 | 184 version(SARRAYVALUE) {} else |
| 185 { | |
| 0 | 186 if (tf.next.toBasetype().ty == TY.Tsarray) |
| 129 | 187 { |
| 188 error(loc, "functions cannot return static array %s", tf.next.toChars()); | |
| 0 | 189 tf.next = Type.terror; |
| 190 } | |
| 96 | 191 } |
| 0 | 192 if (tf.next.toBasetype().ty == TY.Tfunction) |
| 129 | 193 { |
| 194 error(loc, "functions cannot return a function"); | |
| 0 | 195 tf.next = Type.terror; |
| 196 } | |
| 197 if (tf.next.toBasetype().ty == TY.Ttuple) | |
| 129 | 198 { |
| 199 error(loc, "functions cannot return a tuple"); | |
| 0 | 200 tf.next = Type.terror; |
| 201 } | |
| 202 if (tf.next.isauto() && !(sc.flags & SCOPE.SCOPEctor)) | |
| 129 | 203 error(loc, "functions cannot return scope %s", tf.next.toChars()); |
| 135 | 204 if (tf.next.toBasetype().ty == TY.Tvoid) |
| 205 tf.isref = false; // rewrite "ref void" as just "void" | |
| 206 if (tf.next.isWild()) | |
| 207 wildreturn = true; | |
| 208 } | |
| 0 | 209 |
| 135 | 210 bool wildparams = false; |
| 211 bool wildsubparams = false; | |
| 0 | 212 if (tf.parameters) |
| 73 | 213 { |
| 214 /* Create a scope for evaluating the default arguments for the parameters | |
| 215 */ | |
| 216 Scope argsc = sc.push(); | |
| 217 argsc.stc = STCundefined; // don't inherit storage class | |
| 218 argsc.protection = PROT.PROTpublic; | |
| 219 | |
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220 size_t dim = Parameter.dim(tf.parameters); |
| 0 | 221 |
| 222 for (size_t i = 0; i < dim; i++) | |
| 135 | 223 { auto fparam = Parameter.getNth(tf.parameters, i); |
| 0 | 224 |
| 225 tf.inuse++; | |
| 135 | 226 fparam.type = fparam.type.semantic(loc, argsc); |
| 0 | 227 if (tf.inuse == 1) tf.inuse--; |
| 228 | |
| 135 | 229 fparam.type = fparam.type.addStorageClass(fparam.storageClass); |
| 0 | 230 |
| 135 | 231 if (fparam.storageClass & (STC.STCauto | STC.STCalias | STC.STCstatic)) |
| 0 | 232 { |
| 135 | 233 if (!fparam.type) |
| 0 | 234 continue; |
| 235 } | |
| 236 | |
| 135 | 237 Type t = fparam.type.toBasetype(); |
| 0 | 238 |
| 135 | 239 if (fparam.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) |
| 0 | 240 { |
| 96 | 241 //if (t.ty == TY.Tsarray) |
| 242 //error(loc, "cannot have out or ref parameter of type %s", t.toChars()); | |
| 135 | 243 if (fparam.storageClass & STC.STCout && fparam.type.mod & (STCconst | STCimmutable)) |
| 96 | 244 error(loc, "cannot have const or immutabl out parameter of type %s", t.toChars()); |
| 0 | 245 } |
| 135 | 246 if (!(fparam.storageClass & STC.STClazy) && t.ty == TY.Tvoid) |
| 247 error(loc, "cannot have parameter of type %s", fparam.type.toChars()); | |
| 0 | 248 |
| 135 | 249 if (t.isWild()) |
| 250 { | |
| 251 wildparams = true; | |
| 252 if (tf.next && !wildreturn) | |
| 253 error(loc, "inout on parameter means inout must be on return type as well (if from D1 code, replace with 'ref')"); | |
| 254 } | |
| 255 else if (!wildsubparams && t.hasWild()) | |
| 256 wildsubparams = true; | |
| 0 | 257 |
| 135 | 258 if (fparam.defaultArg) |
| 259 { | |
| 260 fparam.defaultArg = fparam.defaultArg.semantic(argsc); | |
| 261 fparam.defaultArg = resolveProperties(argsc, fparam.defaultArg); | |
| 262 fparam.defaultArg = fparam.defaultArg.implicitCastTo(argsc, fparam.type); | |
| 263 } | |
| 264 | |
| 265 /* If fparam turns out to be a tuple, the number of parameters may | |
| 0 | 266 * change. |
| 267 */ | |
| 268 if (t.ty == TY.Ttuple) | |
| 135 | 269 { |
| 270 // Propagate storage class from tuple parameters to their element-parameters. | |
| 271 auto tt = cast(TypeTuple)t; | |
| 272 if (tt.arguments) | |
| 273 { | |
| 274 auto tdim = tt.arguments.dim; | |
| 275 foreach (narg; tt.arguments) | |
| 276 { | |
| 277 narg.storageClass = fparam.storageClass; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 /* Reset number of parameters, and back up one to do this fparam again, | |
| 282 * now that it is the first element of a tuple | |
| 283 */ | |
| 284 dim = Parameter.dim(tf.parameters); | |
| 0 | 285 i--; |
| 135 | 286 continue; |
| 0 | 287 } |
| 135 | 288 |
| 289 /* Resolve "auto ref" storage class to be either ref or value, | |
| 290 * based on the argument matching the parameter | |
| 291 */ | |
| 292 if (fparam.storageClass & STC.STCauto) | |
| 293 { | |
| 294 if (fargs && i < fargs.dim) | |
| 295 { | |
| 296 auto farg = fargs[i]; | |
| 297 if (farg.isLvalue()) | |
| 298 {} // ref parameter | |
| 299 else | |
| 300 fparam.storageClass &= ~STC.STCref; // value parameter | |
| 301 } | |
| 302 else | |
| 303 error(loc, "auto can only be used for template function parameters"); | |
| 304 } | |
| 0 | 305 } |
| 73 | 306 argsc.pop(); |
| 0 | 307 } |
| 135 | 308 |
| 309 if (wildreturn && !wildparams) | |
| 310 error(loc, "inout on return means inout must be on a parameter as well for %s", toChars()); | |
| 311 if (wildsubparams && wildparams) | |
| 312 error(loc, "inout must be all or none on top level for %s", toChars()); | |
| 313 | |
| 0 | 314 if (tf.next) |
| 315 tf.deco = tf.merge().deco; | |
| 316 | |
| 317 if (tf.inuse) | |
| 318 { error(loc, "recursive type"); | |
| 319 tf.inuse = 0; | |
| 320 return terror; | |
| 321 } | |
| 322 | |
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323 if (tf.isproperty && (tf.varargs || Parameter.dim(tf.parameters) > 1)) |
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324 error(loc, "properties can only have zero or one parameter"); |
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325 |
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326 if (tf.varargs == 1 && tf.linkage != LINK.LINKd && Parameter.dim(tf.parameters) == 0) |
| 0 | 327 error(loc, "variadic functions with non-D linkage must have at least one parameter"); |
| 328 | |
| 329 /* Don't return merge(), because arg identifiers and default args | |
| 330 * can be different | |
| 331 * even though the types match | |
| 332 */ | |
| 333 return tf; | |
| 334 } | |
| 335 | |
| 72 | 336 override void toDecoBuffer(OutBuffer buf, int flag) |
| 0 | 337 { |
| 338 ubyte mc; | |
| 339 | |
| 340 //printf("TypeFunction.toDecoBuffer() this = %p %s\n", this, toChars()); | |
| 341 //static int nest; if (++nest == 50) *(char*)0=0; | |
| 342 if (inuse) | |
| 343 { | |
| 344 inuse = 2; // flag error to caller | |
| 345 return; | |
| 346 } | |
| 347 inuse++; | |
| 135 | 348 MODtoDecoBuffer(buf, mod); |
| 0 | 349 switch (linkage) |
| 350 { | |
| 351 case LINK.LINKd: mc = 'F'; break; | |
| 352 case LINK.LINKc: mc = 'U'; break; | |
| 353 case LINK.LINKwindows: mc = 'W'; break; | |
| 354 case LINK.LINKpascal: mc = 'V'; break; | |
| 355 case LINK.LINKcpp: mc = 'R'; break; | |
| 356 } | |
| 357 buf.writeByte(mc); | |
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358 if (ispure || isnothrow || isproperty || isref || trust) |
| 0 | 359 { |
| 360 if (ispure) | |
| 361 buf.writestring("Na"); | |
| 362 if (isnothrow) | |
| 363 buf.writestring("Nb"); | |
| 364 if (isref) | |
| 365 buf.writestring("Nc"); | |
| 366 if (isproperty) | |
| 367 buf.writestring("Nd"); | |
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368 switch (trust) |
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369 { |
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370 case TRUST.TRUSTtrusted: |
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371 buf.writestring("Ne"); |
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372 break; |
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373 case TRUST.TRUSTsafe: |
| 135 | 374 buf.writestring("Nf"); |
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375 break; |
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376 default: |
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377 } |
| 0 | 378 } |
| 379 // Write argument types | |
|
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380 Parameter.argsToDecoBuffer(buf, parameters); |
| 0 | 381 //if (buf.data[buf.offset - 1] == '@') halt(); |
| 382 buf.writeByte('Z' - varargs); // mark end of arg list | |
| 79 | 383 assert(next); |
| 0 | 384 next.toDecoBuffer(buf); |
| 385 inuse--; | |
| 386 } | |
| 387 | |
| 72 | 388 override void toCBuffer(OutBuffer buf, Identifier ident, HdrGenState* hgs) |
| 0 | 389 { |
| 390 //printf("TypeFunction.toCBuffer() this = %p\n", this); | |
| 391 string p = null; | |
| 392 | |
| 393 if (inuse) | |
| 394 { | |
| 395 inuse = 2; // flag error to caller | |
| 396 return; | |
| 397 } | |
| 398 inuse++; | |
| 399 | |
| 400 /* Use 'storage class' style for attributes | |
| 401 */ | |
| 135 | 402 if (mod) |
| 403 { | |
| 404 MODtoBuffer(buf, mod); | |
| 405 buf.writeByte(' '); | |
| 406 } | |
| 0 | 407 |
| 408 if (ispure) | |
| 409 buf.writestring("pure "); | |
| 410 if (isnothrow) | |
| 411 buf.writestring("nothrow "); | |
| 412 if (isproperty) | |
| 413 buf.writestring("@property "); | |
| 414 if (isref) | |
| 415 buf.writestring("ref "); | |
| 416 | |
|
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417 switch (trust) |
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418 { |
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419 case TRUST.TRUSTtrusted: |
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420 buf.writestring("@trusted "); |
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421 break; |
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422 |
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423 case TRUST.TRUSTsafe: |
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424 buf.writestring("@safe "); |
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425 break; |
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426 } |
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427 |
| 0 | 428 if (next && (!ident || ident.toHChars2() == ident.toChars())) |
| 429 next.toCBuffer2(buf, hgs, MODundefined); | |
| 430 if (hgs.ddoc != 1) | |
| 431 { | |
| 432 switch (linkage) | |
| 433 { | |
| 434 case LINKd: p = null; break; | |
| 73 | 435 case LINKc: p = " C"; break; |
| 436 case LINKwindows: p = " Windows"; break; | |
| 437 case LINKpascal: p = " Pascal"; break; | |
| 438 case LINKcpp: p = " C++"; break; | |
| 0 | 439 default: |
| 440 assert(0); | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 if (!hgs.hdrgen && p) | |
| 445 buf.writestring(p); | |
| 446 if (ident) | |
| 447 { | |
| 448 buf.writeByte(' '); | |
| 449 buf.writestring(ident.toHChars2()); | |
| 450 } | |
|
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451 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 452 inuse--; |
| 453 } | |
| 454 | |
| 72 | 455 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod) |
| 0 | 456 { |
| 457 //printf("TypeFunction::toCBuffer2() this = %p, ref = %d\n", this, isref); | |
| 458 string p; | |
| 459 | |
| 460 if (inuse) | |
| 461 { | |
| 462 inuse = 2; // flag error to caller | |
| 463 return; | |
| 464 } | |
| 465 | |
| 466 inuse++; | |
| 467 if (next) | |
| 468 next.toCBuffer2(buf, hgs, MODundefined); | |
| 469 | |
| 470 if (hgs.ddoc != 1) | |
| 471 { | |
| 472 switch (linkage) | |
| 473 { | |
| 474 case LINKd: p = null; break; | |
| 475 case LINKc: p = "C "; break; | |
| 476 case LINKwindows: p = "Windows "; break; | |
| 477 case LINKpascal: p = "Pascal "; break; | |
| 478 case LINKcpp: p = "C++ "; break; | |
| 479 default: assert(0); | |
| 480 } | |
| 481 } | |
| 482 | |
| 483 if (!hgs.hdrgen && p) | |
| 484 buf.writestring(p); | |
| 485 buf.writestring(" function"); | |
|
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486 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 487 |
| 488 /* Use postfix style for attributes | |
| 489 */ | |
| 490 if (mod != this.mod) | |
| 491 { | |
| 492 modToBuffer(buf); | |
| 493 } | |
| 494 | |
| 495 if (ispure) | |
| 496 buf.writestring(" pure"); | |
| 497 if (isnothrow) | |
| 498 buf.writestring(" nothrow"); | |
| 499 if (isproperty) | |
| 500 buf.writestring(" @property"); | |
| 501 if (isref) | |
| 502 buf.writestring(" ref"); | |
| 503 | |
|
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504 switch (trust) |
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505 { |
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506 case TRUSTtrusted: |
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507 buf.writestring(" @trusted"); |
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508 break; |
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509 |
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510 case TRUSTsafe: |
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511 buf.writestring(" @safe"); |
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512 break; |
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513 } |
| 0 | 514 inuse--; |
| 515 } | |
| 516 | |
| 72 | 517 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes) |
| 0 | 518 { |
| 123 | 519 //printf("TypeFunction.deduceType()\n"); |
| 520 //printf("\tthis = %d, ", ty); print(); | |
| 521 //printf("\ttparam = %d, ", tparam.ty); tparam.print(); | |
| 522 | |
| 523 // Extra check that function characteristics must match | |
| 524 if (tparam && tparam.ty == Tfunction) | |
| 525 { | |
| 526 TypeFunction tp = cast(TypeFunction)tparam; | |
| 527 if (varargs != tp.varargs || | |
| 528 linkage != tp.linkage) | |
| 529 return MATCHnomatch; | |
| 530 | |
|
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531 size_t nfargs = Parameter.dim(this.parameters); |
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532 size_t nfparams = Parameter.dim(tp.parameters); |
| 123 | 533 |
| 534 /* See if tuple match | |
| 535 */ | |
| 536 if (nfparams > 0 && nfargs >= nfparams - 1) | |
| 537 { | |
| 538 /* See if 'A' of the template parameter matches 'A' | |
| 539 * of the type of the last function parameter. | |
| 540 */ | |
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541 auto fparam = Parameter.getNth(tp.parameters, nfparams - 1); |
| 123 | 542 assert(fparam); |
| 543 assert(fparam.type); | |
| 544 if (fparam.type.ty != Tident) | |
| 545 goto L1; | |
| 546 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 547 if (tid.idents.dim) | |
| 548 goto L1; | |
| 549 | |
| 550 /* Look through parameters to find tuple matching tid.ident | |
| 551 */ | |
| 552 size_t tupi = 0; | |
| 553 for (; 1; tupi++) | |
| 554 { | |
| 555 if (tupi == parameters.dim) | |
| 556 goto L1; | |
| 557 TemplateParameter t = parameters[tupi]; | |
| 558 TemplateTupleParameter tup = t.isTemplateTupleParameter(); | |
| 559 if (tup && tup.ident.equals(tid.ident)) | |
| 560 break; | |
| 561 } | |
| 562 | |
| 563 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
| 564 * now form the tuple argument. | |
| 565 */ | |
| 566 int tuple_dim = nfargs - (nfparams - 1); | |
| 567 | |
| 568 /* See if existing tuple, and whether it matches or not | |
| 569 */ | |
| 570 Object o = dedtypes[tupi]; | |
| 571 if (o) | |
| 572 { | |
| 573 // Existing deduced argument must be a tuple, and must match | |
| 574 Tuple t = isTuple(o); | |
| 575 if (!t || t.objects.dim != tuple_dim) | |
| 576 return MATCHnomatch; | |
| 577 for (size_t i = 0; i < tuple_dim; i++) | |
| 578 { | |
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579 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 580 if (!arg.type.equals(t.objects[i])) |
| 581 return MATCHnomatch; | |
| 582 } | |
| 583 } | |
| 584 else | |
| 585 { // Create new tuple | |
| 586 Tuple t = new Tuple(); | |
| 587 t.objects.setDim(tuple_dim); | |
| 588 for (size_t i = 0; i < tuple_dim; i++) | |
| 589 { | |
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590 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 591 t.objects[i] = arg.type; |
| 592 } | |
| 593 dedtypes[tupi] = t; | |
| 594 } | |
| 595 nfparams--; // don't consider the last parameter for type deduction | |
| 596 goto L2; | |
| 597 } | |
| 598 | |
| 599 L1: | |
| 600 if (nfargs != nfparams) | |
| 601 return MATCHnomatch; | |
| 602 L2: | |
| 603 for (size_t i = 0; i < nfparams; i++) | |
| 604 { | |
|
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605 auto a = Parameter.getNth(this.parameters, i); |
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606 auto ap = Parameter.getNth(tp.parameters, i); |
| 123 | 607 if (a.storageClass != ap.storageClass || |
| 608 !a.type.deduceType(sc, ap.type, parameters, dedtypes)) | |
| 609 return MATCHnomatch; | |
| 610 } | |
| 611 } | |
| 612 return Type.deduceType(sc, tparam, parameters, dedtypes); | |
| 0 | 613 } |
| 614 | |
| 72 | 615 override TypeInfoDeclaration getTypeInfoDeclaration() |
| 0 | 616 { |
| 129 | 617 return new TypeInfoFunctionDeclaration(this); |
| 0 | 618 } |
| 619 | |
| 72 | 620 override Type reliesOnTident() |
| 0 | 621 { |
| 135 | 622 size_t dim = Parameter.dim(parameters); |
| 623 for (size_t i = 0; i < dim; i++) | |
| 624 { | |
| 625 auto fparam = Parameter.getNth(parameters, i); | |
| 626 Type t = fparam.type.reliesOnTident(); | |
| 627 if (t) | |
| 628 return t; | |
| 629 } | |
| 630 return next ? next.reliesOnTident() : null; | |
| 0 | 631 } |
| 632 | |
| 633 version (CPP_MANGLE) { | |
| 634 void toCppMangle(OutBuffer buf, CppMangleState* cms) | |
| 635 { | |
| 636 assert(false); | |
| 637 } | |
| 638 } | |
| 639 | |
| 640 /*************************** | |
| 641 * Examine function signature for parameter p and see if | |
| 642 * p can 'escape' the scope of the function. | |
| 643 */ | |
|
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644 bool parameterEscapes(Parameter p) |
| 0 | 645 { |
| 646 /* Scope parameters do not escape. | |
| 647 * Allow 'lazy' to imply 'scope' - | |
| 648 * lazy parameters can be passed along | |
| 649 * as lazy parameters to the next function, but that isn't | |
| 650 * escaping. | |
| 651 */ | |
| 652 if (p.storageClass & (STC.STCscope | STC.STClazy)) | |
| 653 return false; | |
| 654 | |
| 655 if (ispure) | |
| 656 { /* With pure functions, we need only be concerned if p escapes | |
| 657 * via any return statement. | |
| 658 */ | |
| 659 Type tret = nextOf().toBasetype(); | |
| 660 if (!isref && !tret.hasPointers()) | |
| 661 { /* The result has no references, so p could not be escaping | |
| 662 * that way. | |
| 663 */ | |
| 664 return false; | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 /* Assume it escapes in the absence of better information. | |
| 669 */ | |
| 670 return true; | |
| 671 } | |
| 672 | |
| 673 /******************************** | |
| 674 * 'args' are being matched to function 'this' | |
| 675 * Determine match level. | |
| 676 * Returns: | |
| 677 * MATCHxxxx | |
| 678 */ | |
| 679 MATCH callMatch(Expression ethis, Expressions args) | |
| 680 { | |
| 681 //printf("TypeFunction.callMatch() %s\n", toChars()); | |
| 682 MATCH match = MATCH.MATCHexact; // assume exact match | |
| 135 | 683 bool exactwildmatch = false; |
| 684 bool wildmatch = false; | |
| 0 | 685 |
| 686 if (ethis) | |
| 687 { | |
| 688 Type t = ethis.type; | |
| 689 if (t.toBasetype().ty == TY.Tpointer) | |
| 690 t = t.toBasetype().nextOf(); // change struct* to struct | |
| 691 | |
| 692 if (t.mod != mod) | |
| 693 { | |
| 135 | 694 if (MODimplicitConv(t.mod, mod)) |
| 0 | 695 match = MATCH.MATCHconst; |
| 696 else | |
| 697 return MATCH.MATCHnomatch; | |
| 698 } | |
| 699 } | |
| 700 | |
|
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701 size_t nparams = Parameter.dim(parameters); |
| 0 | 702 size_t nargs = args ? args.dim : 0; |
| 703 if (nparams == nargs) { | |
| 704 ; | |
| 705 } else if (nargs > nparams) | |
| 706 { | |
| 707 if (varargs == 0) | |
| 708 goto Nomatch; // too many args; no match | |
| 709 match = MATCH.MATCHconvert; // match ... with a "conversion" match level | |
| 710 } | |
| 711 | |
| 712 for (size_t u = 0; u < nparams; u++) | |
| 713 { | |
| 714 MATCH m; | |
| 715 Expression arg; | |
| 716 | |
| 717 // BUG: what about out and ref? | |
| 718 | |
|
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719 auto p = Parameter.getNth(parameters, u); |
| 0 | 720 assert(p); |
| 721 if (u >= nargs) | |
| 722 { | |
| 723 if (p.defaultArg) | |
| 724 continue; | |
| 725 if (varargs == 2 && u + 1 == nparams) | |
| 726 goto L1; | |
| 727 goto Nomatch; // not enough arguments | |
| 728 } | |
| 729 | |
|
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730 arg = cast(Expression)args[u]; |
| 0 | 731 assert(arg); |
| 96 | 732 // writef("arg: %s, type: %s\n", arg.toChars(), arg.type.toChars()); |
| 733 | |
| 0 | 734 |
| 735 // Non-lvalues do not match ref or out parameters | |
| 96 | 736 if (p.storageClass & (STC.STCref | STC.STCout)) |
| 737 { | |
| 738 if (!arg.isLvalue()) | |
| 739 goto Nomatch; | |
| 740 } | |
| 741 | |
| 742 if (p.storageClass & STCref) | |
| 743 { | |
| 135 | 744 /* Don't allow static arrays to be passed to mutable references |
| 96 | 745 * to static arrays if the argument cannot be modified. |
| 746 */ | |
| 747 Type targb = arg.type.toBasetype(); | |
| 748 Type tparb = p.type.toBasetype(); | |
| 749 //writef("%s\n", targb.toChars()); | |
| 750 //writef("%s\n", tparb.toChars()); | |
| 751 if (targb.nextOf() && tparb.ty == Tsarray && | |
| 135 | 752 !MODimplicitConv(targb.nextOf().mod, tparb.nextOf().mod)) |
| 96 | 753 goto Nomatch; |
| 754 } | |
| 0 | 755 |
| 756 if (p.storageClass & STC.STClazy && p.type.ty == TY.Tvoid && arg.type.ty != TY.Tvoid) | |
| 757 m = MATCH.MATCHconvert; | |
| 758 else | |
| 135 | 759 { |
| 0 | 760 m = arg.implicitConvTo(p.type); |
| 135 | 761 if (p.type.isWild()) |
| 762 { | |
| 763 if (m == MATCHnomatch) | |
| 764 { | |
| 765 m = arg.implicitConvTo(p.type.constOf()); | |
| 766 if (m == MATCHnomatch) | |
| 767 m = arg.implicitConvTo(p.type.sharedConstOf()); | |
| 768 if (m != MATCHnomatch) | |
| 769 wildmatch = true; // mod matched to wild | |
| 770 } | |
| 771 else | |
| 772 exactwildmatch = true; // wild matched to wild | |
| 773 | |
| 774 /* If both are allowed, then there could be more than one | |
| 775 * binding of mod to wild, leaving a gaping type hole. | |
| 776 */ | |
| 777 if (wildmatch && exactwildmatch) | |
| 778 m = MATCHnomatch; | |
| 779 } | |
| 780 } | |
| 781 | |
| 0 | 782 //printf("\tm = %d\n", m); |
| 783 if (m == MATCH.MATCHnomatch) // if no match | |
| 784 { | |
| 785 L1: | |
| 786 if (varargs == 2 && u + 1 == nparams) // if last varargs param | |
| 787 { | |
| 788 Type tb = p.type.toBasetype(); | |
| 789 TypeSArray tsa; | |
| 790 long sz; | |
| 791 | |
| 792 switch (tb.ty) | |
| 793 { | |
| 794 case TY.Tsarray: | |
| 795 tsa = cast(TypeSArray)tb; | |
| 796 sz = tsa.dim.toInteger(); | |
| 797 if (sz != nargs - u) | |
| 798 goto Nomatch; | |
| 799 case TY.Tarray: | |
| 800 { | |
| 801 TypeArray ta = cast(TypeArray)tb; | |
| 802 for (; u < nargs; u++) | |
| 803 { | |
|
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804 arg = cast(Expression)args[u]; |
| 0 | 805 assert(arg); |
| 806 static if (true) { | |
| 807 /* If lazy array of delegates, | |
| 808 * convert arg(s) to delegate(s) | |
| 809 */ | |
| 810 Type tret = p.isLazyArray(); | |
| 811 if (tret) | |
| 812 { | |
| 813 if (ta.next.equals(arg.type)) | |
| 814 { | |
| 815 m = MATCH.MATCHexact; | |
| 816 } | |
| 817 else | |
| 818 { | |
| 819 m = arg.implicitConvTo(tret); | |
| 820 if (m == MATCH.MATCHnomatch) | |
| 821 { | |
| 822 if (tret.toBasetype().ty == TY.Tvoid) | |
| 823 m = MATCH.MATCHconvert; | |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 else | |
| 828 m = arg.implicitConvTo(ta.next); | |
| 829 } else { | |
| 830 m = arg.implicitConvTo(ta.next); | |
| 831 } | |
| 832 if (m == MATCH.MATCHnomatch) | |
| 833 goto Nomatch; | |
| 834 | |
| 835 if (m < match) | |
| 836 match = m; | |
| 837 } | |
| 838 goto Ldone; | |
| 839 } | |
| 840 | |
| 841 case TY.Tclass: | |
| 842 // Should see if there's a constructor match? | |
| 843 // Or just leave it ambiguous? | |
| 844 goto Ldone; | |
| 845 | |
| 846 default: | |
| 847 goto Nomatch; | |
| 848 } | |
| 849 } | |
| 850 | |
| 851 goto Nomatch; | |
| 852 } | |
| 853 | |
| 854 if (m < match) | |
| 855 match = m; // pick worst match | |
| 856 } | |
| 857 | |
| 858 Ldone: | |
| 859 //printf("match = %d\n", match); | |
| 860 return match; | |
| 861 | |
| 862 Nomatch: | |
| 863 //printf("no match\n"); | |
| 864 return MATCH.MATCHnomatch; | |
| 865 } | |
| 866 | |
| 96 | 867 override type* toCtype() |
| 0 | 868 { |
| 869 if (ctype) { | |
| 870 return ctype; | |
| 871 } | |
| 872 | |
| 873 type* t; | |
| 874 if (true) | |
| 875 { | |
| 876 param_t* paramtypes; | |
| 877 tym_t tyf; | |
| 878 type* tp; | |
| 879 | |
| 880 paramtypes = null; | |
|
130
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dmdfe 2.037 first main iteration
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
changeset
|
881 size_t nparams = Parameter.dim(parameters); |
| 0 | 882 for (size_t i = 0; i < nparams; i++) |
| 883 { | |
|
130
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dmdfe 2.037 first main iteration
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
129
diff
changeset
|
884 auto arg = Parameter.getNth(parameters, i); |
| 0 | 885 tp = arg.type.toCtype(); |
| 886 if (arg.storageClass & (STC.STCout | STC.STCref)) | |
| 887 { | |
| 888 // C doesn't have reference types, so it's really a pointer | |
| 889 // to the parameter type | |
| 890 tp = type_allocn(TYM.TYref, tp); | |
| 891 } | |
| 892 param_append_type(¶mtypes,tp); | |
| 893 } | |
| 894 tyf = totym(); | |
| 895 t = type_alloc(tyf); | |
| 896 t.Tflags |= TF.TFprototype; | |
| 897 if (varargs != 1) | |
| 898 t.Tflags |= TF.TFfixed; | |
| 899 ctype = t; | |
| 900 t.Tnext = next.toCtype(); | |
| 901 t.Tnext.Tcount++; | |
| 902 t.Tparamtypes = paramtypes; | |
| 903 } | |
| 904 ctype = t; | |
| 905 return t; | |
| 906 } | |
| 907 | |
| 908 /*************************** | |
| 909 * Determine return style of function - whether in registers or | |
| 910 * through a hidden pointer to the caller's stack. | |
| 911 */ | |
| 96 | 912 RET retStyle() |
| 0 | 913 { |
| 914 //printf("TypeFunction.retStyle() %s\n", toChars()); | |
| 95 | 915 version (DMDV2) |
| 916 { | |
| 0 | 917 if (isref) |
| 918 return RET.RETregs; // returns a pointer | |
| 919 } | |
| 920 | |
| 921 Type tn = next.toBasetype(); | |
| 95 | 922 Type tns = tn; |
| 923 ulong sz = tn.size(); | |
| 0 | 924 |
| 95 | 925 version(SARRAYVALUE) |
| 926 { | |
| 927 if (tn.ty == Tsarray) | |
| 928 { | |
| 929 do | |
| 930 { | |
| 931 tns = tns.nextOf().toBasetype(); | |
| 932 } while (tns.ty == Tsarray); | |
| 933 if (tns.ty != Tstruct) | |
| 934 { | |
| 935 if (global.params.isLinux && linkage != LINKd) | |
| 936 {} | |
| 937 else | |
| 938 { | |
| 939 switch (sz) | |
| 940 { case 1: | |
| 941 case 2: | |
| 942 case 4: | |
| 943 case 8: | |
| 96 | 944 return RET.RETregs; // return small structs in regs |
| 945 // (not 3 byte structs!) | |
| 95 | 946 default: |
| 947 break; | |
| 948 } | |
| 949 } | |
| 96 | 950 return RET.RETstack; |
| 95 | 951 } |
| 952 } | |
| 953 } | |
| 954 if (tns.ty == TY.Tstruct) | |
| 0 | 955 { |
| 956 StructDeclaration sd = (cast(TypeStruct)tn).sym; | |
| 957 if (global.params.isLinux && linkage != LINK.LINKd) { | |
| 958 ; | |
| 959 } | |
| 95 | 960 ///version (DMDV2) { // TODO: |
| 961 else if (sd.dtor || sd.cpctor) | |
| 962 { | |
| 0 | 963 } |
| 964 ///} | |
| 965 else | |
| 966 { | |
| 95 | 967 switch (sz) |
| 0 | 968 { |
| 969 case 1: | |
| 970 case 2: | |
| 971 case 4: | |
| 972 case 8: | |
| 973 return RET.RETregs; // return small structs in regs | |
| 974 // (not 3 byte structs!) | |
| 975 default: | |
| 976 break; | |
| 977 } | |
| 978 } | |
| 979 return RET.RETstack; | |
| 980 } | |
| 981 else if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && | |
| 982 linkage == LINK.LINKc && | |
| 983 tn.iscomplex()) | |
| 984 { | |
| 985 if (tn.ty == TY.Tcomplex32) | |
| 986 return RET.RETregs; // in EDX:EAX, not ST1:ST0 | |
| 987 else | |
| 988 return RET.RETstack; | |
| 989 } | |
| 990 else | |
| 991 return RET.RETregs; | |
| 992 } | |
| 993 | |
| 72 | 994 override TYM totym() |
| 0 | 995 { |
| 996 TYM tyf; | |
| 997 | |
| 998 //printf("TypeFunction.totym(), linkage = %d\n", linkage); | |
| 999 switch (linkage) | |
| 1000 { | |
| 1001 case LINK.LINKwindows: | |
| 1002 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnsfunc; | |
| 1003 break; | |
| 1004 | |
| 1005 case LINK.LINKpascal: | |
| 1006 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnpfunc; | |
| 1007 break; | |
| 1008 | |
| 1009 case LINK.LINKc: | |
| 1010 tyf = TYM.TYnfunc; | |
|
22
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Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1011 version (POSIX) {///TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_SOLARIS |
| 0 | 1012 if (retStyle() == RET.RETstack) |
| 1013 tyf = TYM.TYhfunc; | |
| 1014 } | |
| 1015 break; | |
| 1016 | |
| 1017 case LINK.LINKd: | |
| 1018 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYjfunc; | |
| 1019 break; | |
| 1020 | |
| 1021 case LINK.LINKcpp: | |
| 1022 tyf = TYM.TYnfunc; | |
| 1023 break; | |
| 1024 | |
| 1025 default: | |
| 1026 writef("linkage = %d\n", linkage); | |
| 1027 assert(0); | |
| 1028 } | |
| 1029 version (DMDV2) { | |
| 1030 if (isnothrow) | |
| 1031 tyf |= mTY.mTYnothrow; | |
| 1032 } | |
| 1033 return tyf; | |
| 1034 } | |
|
22
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Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
1035 } |