Mercurial > projects > ddmd
annotate dmd/TypeFunction.d @ 130:60bb0fe4563e
dmdfe 2.037 first main iteration
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Thu, 09 Sep 2010 22:51:44 +0100 |
| parents | 010eb8f0e18d |
| children | 206db751bd4c |
| 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; |
| 123 | 35 import dmd.TemplateInstance : isTuple; |
| 0 | 36 |
| 37 import dmd.backend.TYPE; | |
| 38 import dmd.backend.PARAM; | |
| 39 import dmd.backend.Util; | |
| 40 import dmd.backend.TYM; | |
| 41 import dmd.backend.TF; | |
| 42 import dmd.backend.mTY; | |
| 43 | |
| 44 import core.stdc.stdlib; | |
| 45 import core.stdc.string; | |
| 46 | |
| 129 | 47 import std.stdio; |
| 48 | |
| 0 | 49 class TypeFunction : TypeNext |
| 50 { | |
| 51 // .next is the return type | |
| 52 | |
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53 Parameters parameters; // function parameters |
| 0 | 54 int varargs; // 1: T t, ...) style for variable number of arguments |
| 55 // 2: T t ...) style for variable number of arguments | |
| 56 bool isnothrow; // true: nothrow | |
| 57 bool ispure; // true: pure | |
| 58 bool isproperty; // can be called without parentheses | |
| 59 bool isref; // true: returns a reference | |
| 60 LINK linkage; // calling convention | |
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61 TRUST trust; // level of trust |
| 0 | 62 |
| 63 int inuse; | |
| 64 | |
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65 this(Parameters parameters, Type treturn, int varargs, LINK linkage) |
| 0 | 66 { |
| 67 super(TY.Tfunction, treturn); | |
| 68 | |
| 69 //if (!treturn) *(char*)0=0; | |
| 70 // assert(treturn); | |
| 71 assert(0 <= varargs && varargs <= 2); | |
| 72 this.parameters = parameters; | |
| 73 this.varargs = varargs; | |
| 74 this.linkage = linkage; | |
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75 this.trust = TRUSTdefault; |
| 0 | 76 } |
| 77 | |
| 72 | 78 override Type syntaxCopy() |
| 0 | 79 { |
| 80 Type treturn = next ? next.syntaxCopy() : null; | |
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81 auto params = Parameter.arraySyntaxCopy(parameters); |
| 0 | 82 TypeFunction t = new TypeFunction(params, treturn, varargs, linkage); |
| 83 t.mod = mod; | |
| 84 t.isnothrow = isnothrow; | |
| 85 t.ispure = ispure; | |
| 86 t.isproperty = isproperty; | |
| 87 t.isref = isref; | |
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88 t.trust = trust; |
| 0 | 89 |
| 90 return t; | |
| 91 } | |
| 92 | |
| 93 version (DumbClone) { | |
| 94 } else { | |
| 95 final TypeFunction cloneTo(TypeFunction t) | |
| 96 { | |
| 97 super.cloneTo(t); | |
| 98 | |
| 99 // these 3 should be set by ctor | |
| 100 assert(t.parameters is null); | |
| 101 assert(t.varargs == varargs); | |
| 102 assert(t.linkage == linkage); | |
| 103 | |
| 104 t.isnothrow = isnothrow; | |
| 105 t.ispure = ispure; | |
| 106 t.isproperty = isproperty; | |
| 107 t.isref = isref; | |
| 108 t.inuse = inuse; | |
| 109 | |
| 110 if (parameters) | |
| 111 { | |
| 112 t.parameters = parameters.copy(); | |
| 129 | 113 foreach (arg; parameters) |
| 0 | 114 { |
| 115 Argument cpy = arg.clone(); | |
| 129 | 116 t.parameters[i] = cpy; |
| 0 | 117 } |
| 118 } | |
| 119 | |
| 120 return t; | |
| 121 } | |
| 122 | |
| 123 TypeFunction clone() | |
| 124 { | |
| 129 | 125 assert(this.classinfo is TypeFunction.classinfo); |
| 0 | 126 return cloneTo(new TypeFunction(null, next, varargs, linkage)); |
| 127 } | |
| 128 } | |
| 72 | 129 override Type semantic(Loc loc, Scope sc) |
| 0 | 130 { |
| 131 if (deco) // if semantic() already run | |
| 132 { | |
| 133 //printf("already done\n"); | |
| 134 return this; | |
| 135 } | |
| 136 //printf("TypeFunction.semantic() this = %p\n", this); | |
| 137 //printf("TypeFunction.semantic() %s, sc.stc = %x\n", toChars(), sc.stc); | |
| 138 | |
| 139 /* Copy in order to not mess up original. | |
| 140 * This can produce redundant copies if inferring return type, | |
| 141 * as semantic() will get called again on this. | |
| 142 */ | |
| 143 | |
| 129 | 144 TypeFunction tf = cloneThis(this); |
| 0 | 145 |
| 146 if (sc.stc & STC.STCpure) | |
| 147 tf.ispure = true; | |
| 148 if (sc.stc & STC.STCnothrow) | |
| 149 tf.isnothrow = true; | |
| 150 if (sc.stc & STC.STCref) | |
| 151 tf.isref = true; | |
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152 if (sc.stc & STCsafe) |
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153 tf.trust = TRUST.TRUSTsafe; |
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154 if (sc.stc & STCtrusted) |
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155 tf.trust = TRUST.TRUSTtrusted; |
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156 if (sc.stc & STCproperty) |
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157 tf.isproperty = true; |
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158 |
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159 tf.linkage = sc.linkage; |
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160 |
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161 /* If the parent is @safe, then this function defaults to safe |
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162 * too. |
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163 */ |
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164 if (tf.trust == TRUST.TRUSTdefault) |
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165 for (Dsymbol p = sc.func; p; p = p.toParent2()) |
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166 { FuncDeclaration fd = p.isFuncDeclaration(); |
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167 if (fd) |
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168 { |
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169 if (fd.isSafe()) |
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170 tf.trust = TRUST.TRUSTsafe; // default to @safe |
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171 break; |
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172 } |
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173 } |
| 0 | 174 |
| 175 if (tf.next) | |
| 176 { | |
| 177 tf.next = tf.next.semantic(loc,sc); | |
| 96 | 178 version(SARRAYVALUE) {} else |
| 179 { | |
| 0 | 180 if (tf.next.toBasetype().ty == TY.Tsarray) |
| 129 | 181 { |
| 182 error(loc, "functions cannot return static array %s", tf.next.toChars()); | |
| 0 | 183 tf.next = Type.terror; |
| 184 } | |
| 96 | 185 } |
| 0 | 186 if (tf.next.toBasetype().ty == TY.Tfunction) |
| 129 | 187 { |
| 188 error(loc, "functions cannot return a function"); | |
| 0 | 189 tf.next = Type.terror; |
| 190 } | |
| 191 if (tf.next.toBasetype().ty == TY.Ttuple) | |
| 129 | 192 { |
| 193 error(loc, "functions cannot return a tuple"); | |
| 0 | 194 tf.next = Type.terror; |
| 195 } | |
| 196 if (tf.next.isauto() && !(sc.flags & SCOPE.SCOPEctor)) | |
| 129 | 197 error(loc, "functions cannot return scope %s", tf.next.toChars()); |
| 0 | 198 } |
| 199 | |
| 200 if (tf.parameters) | |
| 73 | 201 { |
| 202 /* Create a scope for evaluating the default arguments for the parameters | |
| 203 */ | |
| 204 Scope argsc = sc.push(); | |
| 205 argsc.stc = STCundefined; // don't inherit storage class | |
| 206 argsc.protection = PROT.PROTpublic; | |
| 207 | |
| 208 size_t dim = Argument.dim(tf.parameters); | |
| 0 | 209 |
| 210 for (size_t i = 0; i < dim; i++) | |
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211 { auto arg = Parameter.getNth(tf.parameters, i); |
| 0 | 212 |
| 213 tf.inuse++; | |
| 73 | 214 arg.type = arg.type.semantic(loc, argsc); |
| 0 | 215 if (tf.inuse == 1) tf.inuse--; |
| 216 | |
| 217 arg.type = arg.type.addStorageClass(arg.storageClass); | |
| 218 | |
| 219 if (arg.storageClass & (STC.STCauto | STC.STCalias | STC.STCstatic)) | |
| 220 { | |
| 221 if (!arg.type) | |
| 222 continue; | |
| 223 } | |
| 224 | |
| 225 Type t = arg.type.toBasetype(); | |
| 226 | |
| 227 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 228 { | |
| 96 | 229 //if (t.ty == TY.Tsarray) |
| 230 //error(loc, "cannot have out or ref parameter of type %s", t.toChars()); | |
| 231 if (arg.storageClass & STC.STCout && arg.type.mod & (STCconst | STCimmutable)) | |
| 232 error(loc, "cannot have const or immutabl out parameter of type %s", t.toChars()); | |
| 0 | 233 } |
| 234 if (!(arg.storageClass & STC.STClazy) && t.ty == TY.Tvoid) | |
| 235 error(loc, "cannot have parameter of type %s", arg.type.toChars()); | |
| 236 | |
| 237 if (arg.defaultArg) | |
| 238 { | |
| 73 | 239 arg.defaultArg = arg.defaultArg.semantic(argsc); |
| 240 arg.defaultArg = resolveProperties(argsc, arg.defaultArg); | |
| 241 arg.defaultArg = arg.defaultArg.implicitCastTo(argsc, arg.type); | |
| 0 | 242 } |
| 243 | |
| 244 /* If arg turns out to be a tuple, the number of parameters may | |
| 245 * change. | |
| 246 */ | |
| 247 if (t.ty == TY.Ttuple) | |
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248 { dim = Parameter.dim(tf.parameters); |
| 0 | 249 i--; |
| 250 } | |
| 251 } | |
| 73 | 252 argsc.pop(); |
| 0 | 253 } |
| 254 if (tf.next) | |
| 255 tf.deco = tf.merge().deco; | |
| 256 | |
| 257 if (tf.inuse) | |
| 258 { error(loc, "recursive type"); | |
| 259 tf.inuse = 0; | |
| 260 return terror; | |
| 261 } | |
| 262 | |
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263 if (tf.isproperty && (tf.varargs || Parameter.dim(tf.parameters) > 1)) |
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264 error(loc, "properties can only have zero or one parameter"); |
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265 |
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266 if (tf.varargs == 1 && tf.linkage != LINK.LINKd && Parameter.dim(tf.parameters) == 0) |
| 0 | 267 error(loc, "variadic functions with non-D linkage must have at least one parameter"); |
| 268 | |
| 269 /* Don't return merge(), because arg identifiers and default args | |
| 270 * can be different | |
| 271 * even though the types match | |
| 272 */ | |
| 273 return tf; | |
| 274 } | |
| 275 | |
| 72 | 276 override void toDecoBuffer(OutBuffer buf, int flag) |
| 0 | 277 { |
| 278 ubyte mc; | |
| 279 | |
| 280 //printf("TypeFunction.toDecoBuffer() this = %p %s\n", this, toChars()); | |
| 281 //static int nest; if (++nest == 50) *(char*)0=0; | |
| 282 if (inuse) | |
| 283 { | |
| 284 inuse = 2; // flag error to caller | |
| 285 return; | |
| 286 } | |
| 287 inuse++; | |
| 288 static if (true) { | |
| 289 if (mod & MOD.MODshared) | |
| 290 buf.writeByte('O'); | |
| 291 if (mod & MOD.MODconst) | |
| 292 buf.writeByte('x'); | |
| 293 else if (mod & MOD.MODinvariant) | |
| 294 buf.writeByte('y'); | |
| 295 } | |
| 296 switch (linkage) | |
| 297 { | |
| 298 case LINK.LINKd: mc = 'F'; break; | |
| 299 case LINK.LINKc: mc = 'U'; break; | |
| 300 case LINK.LINKwindows: mc = 'W'; break; | |
| 301 case LINK.LINKpascal: mc = 'V'; break; | |
| 302 case LINK.LINKcpp: mc = 'R'; break; | |
| 303 } | |
| 304 buf.writeByte(mc); | |
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305 if (ispure || isnothrow || isproperty || isref || trust) |
| 0 | 306 { |
| 307 if (ispure) | |
| 308 buf.writestring("Na"); | |
| 309 if (isnothrow) | |
| 310 buf.writestring("Nb"); | |
| 311 if (isref) | |
| 312 buf.writestring("Nc"); | |
| 313 if (isproperty) | |
| 314 buf.writestring("Nd"); | |
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315 switch (trust) |
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316 { |
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317 case TRUST.TRUSTtrusted: |
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318 buf.writestring("Ne"); |
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319 break; |
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320 case TRUST.TRUSTsafe: |
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321 buf.writestring("Nd"); |
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322 break; |
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323 } |
| 0 | 324 } |
| 325 // Write argument types | |
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326 Parameter.argsToDecoBuffer(buf, parameters); |
| 0 | 327 //if (buf.data[buf.offset - 1] == '@') halt(); |
| 328 buf.writeByte('Z' - varargs); // mark end of arg list | |
| 79 | 329 assert(next); |
| 0 | 330 next.toDecoBuffer(buf); |
| 331 inuse--; | |
| 332 } | |
| 333 | |
| 72 | 334 override void toCBuffer(OutBuffer buf, Identifier ident, HdrGenState* hgs) |
| 0 | 335 { |
| 336 //printf("TypeFunction.toCBuffer() this = %p\n", this); | |
| 337 string p = null; | |
| 338 | |
| 339 if (inuse) | |
| 340 { | |
| 341 inuse = 2; // flag error to caller | |
| 342 return; | |
| 343 } | |
| 344 inuse++; | |
| 345 | |
| 346 /* Use 'storage class' style for attributes | |
| 347 */ | |
| 348 if (mod & MODconst) | |
| 349 buf.writestring("const "); | |
| 350 if (mod & MODinvariant) | |
| 351 buf.writestring("immutable "); | |
| 352 if (mod & MODshared) | |
| 353 buf.writestring("shared "); | |
| 354 | |
| 355 if (ispure) | |
| 356 buf.writestring("pure "); | |
| 357 if (isnothrow) | |
| 358 buf.writestring("nothrow "); | |
| 359 if (isproperty) | |
| 360 buf.writestring("@property "); | |
| 361 if (isref) | |
| 362 buf.writestring("ref "); | |
| 363 | |
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364 switch (trust) |
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365 { |
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366 case TRUST.TRUSTtrusted: |
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367 buf.writestring("@trusted "); |
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368 break; |
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369 |
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370 case TRUST.TRUSTsafe: |
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371 buf.writestring("@safe "); |
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372 break; |
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373 } |
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374 |
| 0 | 375 if (next && (!ident || ident.toHChars2() == ident.toChars())) |
| 376 next.toCBuffer2(buf, hgs, MODundefined); | |
| 377 if (hgs.ddoc != 1) | |
| 378 { | |
| 379 switch (linkage) | |
| 380 { | |
| 381 case LINKd: p = null; break; | |
| 73 | 382 case LINKc: p = " C"; break; |
| 383 case LINKwindows: p = " Windows"; break; | |
| 384 case LINKpascal: p = " Pascal"; break; | |
| 385 case LINKcpp: p = " C++"; break; | |
| 0 | 386 default: |
| 387 assert(0); | |
| 388 } | |
| 389 } | |
| 390 | |
| 391 if (!hgs.hdrgen && p) | |
| 392 buf.writestring(p); | |
| 393 if (ident) | |
| 394 { | |
| 395 buf.writeByte(' '); | |
| 396 buf.writestring(ident.toHChars2()); | |
| 397 } | |
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398 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 399 inuse--; |
| 400 } | |
| 401 | |
| 72 | 402 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod) |
| 0 | 403 { |
| 404 //printf("TypeFunction::toCBuffer2() this = %p, ref = %d\n", this, isref); | |
| 405 string p; | |
| 406 | |
| 407 if (inuse) | |
| 408 { | |
| 409 inuse = 2; // flag error to caller | |
| 410 return; | |
| 411 } | |
| 412 | |
| 413 inuse++; | |
| 414 if (next) | |
| 415 next.toCBuffer2(buf, hgs, MODundefined); | |
| 416 | |
| 417 if (hgs.ddoc != 1) | |
| 418 { | |
| 419 switch (linkage) | |
| 420 { | |
| 421 case LINKd: p = null; break; | |
| 422 case LINKc: p = "C "; break; | |
| 423 case LINKwindows: p = "Windows "; break; | |
| 424 case LINKpascal: p = "Pascal "; break; | |
| 425 case LINKcpp: p = "C++ "; break; | |
| 426 default: assert(0); | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 if (!hgs.hdrgen && p) | |
| 431 buf.writestring(p); | |
| 432 buf.writestring(" function"); | |
|
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433 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 434 |
| 435 /* Use postfix style for attributes | |
| 436 */ | |
| 437 if (mod != this.mod) | |
| 438 { | |
| 439 modToBuffer(buf); | |
| 440 } | |
| 441 | |
| 442 if (ispure) | |
| 443 buf.writestring(" pure"); | |
| 444 if (isnothrow) | |
| 445 buf.writestring(" nothrow"); | |
| 446 if (isproperty) | |
| 447 buf.writestring(" @property"); | |
| 448 if (isref) | |
| 449 buf.writestring(" ref"); | |
| 450 | |
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451 switch (trust) |
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452 { |
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453 case TRUSTtrusted: |
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454 buf.writestring(" @trusted"); |
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455 break; |
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456 |
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457 case TRUSTsafe: |
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458 buf.writestring(" @safe"); |
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459 break; |
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460 } |
| 0 | 461 inuse--; |
| 462 } | |
| 463 | |
| 72 | 464 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes) |
| 0 | 465 { |
| 123 | 466 //printf("TypeFunction.deduceType()\n"); |
| 467 //printf("\tthis = %d, ", ty); print(); | |
| 468 //printf("\ttparam = %d, ", tparam.ty); tparam.print(); | |
| 469 | |
| 470 // Extra check that function characteristics must match | |
| 471 if (tparam && tparam.ty == Tfunction) | |
| 472 { | |
| 473 TypeFunction tp = cast(TypeFunction)tparam; | |
| 474 if (varargs != tp.varargs || | |
| 475 linkage != tp.linkage) | |
| 476 return MATCHnomatch; | |
| 477 | |
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478 size_t nfargs = Parameter.dim(this.parameters); |
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479 size_t nfparams = Parameter.dim(tp.parameters); |
| 123 | 480 |
| 481 /* See if tuple match | |
| 482 */ | |
| 483 if (nfparams > 0 && nfargs >= nfparams - 1) | |
| 484 { | |
| 485 /* See if 'A' of the template parameter matches 'A' | |
| 486 * of the type of the last function parameter. | |
| 487 */ | |
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488 auto fparam = Parameter.getNth(tp.parameters, nfparams - 1); |
| 123 | 489 assert(fparam); |
| 490 assert(fparam.type); | |
| 491 if (fparam.type.ty != Tident) | |
| 492 goto L1; | |
| 493 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 494 if (tid.idents.dim) | |
| 495 goto L1; | |
| 496 | |
| 497 /* Look through parameters to find tuple matching tid.ident | |
| 498 */ | |
| 499 size_t tupi = 0; | |
| 500 for (; 1; tupi++) | |
| 501 { | |
| 502 if (tupi == parameters.dim) | |
| 503 goto L1; | |
| 504 TemplateParameter t = parameters[tupi]; | |
| 505 TemplateTupleParameter tup = t.isTemplateTupleParameter(); | |
| 506 if (tup && tup.ident.equals(tid.ident)) | |
| 507 break; | |
| 508 } | |
| 509 | |
| 510 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
| 511 * now form the tuple argument. | |
| 512 */ | |
| 513 int tuple_dim = nfargs - (nfparams - 1); | |
| 514 | |
| 515 /* See if existing tuple, and whether it matches or not | |
| 516 */ | |
| 517 Object o = dedtypes[tupi]; | |
| 518 if (o) | |
| 519 { | |
| 520 // Existing deduced argument must be a tuple, and must match | |
| 521 Tuple t = isTuple(o); | |
| 522 if (!t || t.objects.dim != tuple_dim) | |
| 523 return MATCHnomatch; | |
| 524 for (size_t i = 0; i < tuple_dim; i++) | |
| 525 { | |
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526 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 527 if (!arg.type.equals(t.objects[i])) |
| 528 return MATCHnomatch; | |
| 529 } | |
| 530 } | |
| 531 else | |
| 532 { // Create new tuple | |
| 533 Tuple t = new Tuple(); | |
| 534 t.objects.setDim(tuple_dim); | |
| 535 for (size_t i = 0; i < tuple_dim; i++) | |
| 536 { | |
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537 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 538 t.objects[i] = arg.type; |
| 539 } | |
| 540 dedtypes[tupi] = t; | |
| 541 } | |
| 542 nfparams--; // don't consider the last parameter for type deduction | |
| 543 goto L2; | |
| 544 } | |
| 545 | |
| 546 L1: | |
| 547 if (nfargs != nfparams) | |
| 548 return MATCHnomatch; | |
| 549 L2: | |
| 550 for (size_t i = 0; i < nfparams; i++) | |
| 551 { | |
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552 auto a = Parameter.getNth(this.parameters, i); |
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553 auto ap = Parameter.getNth(tp.parameters, i); |
| 123 | 554 if (a.storageClass != ap.storageClass || |
| 555 !a.type.deduceType(sc, ap.type, parameters, dedtypes)) | |
| 556 return MATCHnomatch; | |
| 557 } | |
| 558 } | |
| 559 return Type.deduceType(sc, tparam, parameters, dedtypes); | |
| 0 | 560 } |
| 561 | |
| 72 | 562 override TypeInfoDeclaration getTypeInfoDeclaration() |
| 0 | 563 { |
| 129 | 564 return new TypeInfoFunctionDeclaration(this); |
| 0 | 565 } |
| 566 | |
| 72 | 567 override Type reliesOnTident() |
| 0 | 568 { |
| 569 if (parameters) | |
| 570 { | |
|
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571 foreach (arg; parameters) |
| 0 | 572 { |
| 573 Type t = arg.type.reliesOnTident(); | |
| 574 if (t) | |
| 575 return t; | |
| 576 } | |
| 577 } | |
| 578 return next.reliesOnTident(); | |
| 579 } | |
| 580 | |
| 581 version (CPP_MANGLE) { | |
| 582 void toCppMangle(OutBuffer buf, CppMangleState* cms) | |
| 583 { | |
| 584 assert(false); | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 /*************************** | |
| 589 * Examine function signature for parameter p and see if | |
| 590 * p can 'escape' the scope of the function. | |
| 591 */ | |
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592 bool parameterEscapes(Parameter p) |
| 0 | 593 { |
| 594 /* Scope parameters do not escape. | |
| 595 * Allow 'lazy' to imply 'scope' - | |
| 596 * lazy parameters can be passed along | |
| 597 * as lazy parameters to the next function, but that isn't | |
| 598 * escaping. | |
| 599 */ | |
| 600 if (p.storageClass & (STC.STCscope | STC.STClazy)) | |
| 601 return false; | |
| 602 | |
| 603 if (ispure) | |
| 604 { /* With pure functions, we need only be concerned if p escapes | |
| 605 * via any return statement. | |
| 606 */ | |
| 607 Type tret = nextOf().toBasetype(); | |
| 608 if (!isref && !tret.hasPointers()) | |
| 609 { /* The result has no references, so p could not be escaping | |
| 610 * that way. | |
| 611 */ | |
| 612 return false; | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 /* Assume it escapes in the absence of better information. | |
| 617 */ | |
| 618 return true; | |
| 619 } | |
| 620 | |
| 621 /******************************** | |
| 622 * 'args' are being matched to function 'this' | |
| 623 * Determine match level. | |
| 624 * Returns: | |
| 625 * MATCHxxxx | |
| 626 */ | |
| 627 MATCH callMatch(Expression ethis, Expressions args) | |
| 628 { | |
| 629 //printf("TypeFunction.callMatch() %s\n", toChars()); | |
| 630 MATCH match = MATCH.MATCHexact; // assume exact match | |
| 631 | |
| 632 if (ethis) | |
| 633 { | |
| 634 Type t = ethis.type; | |
| 635 if (t.toBasetype().ty == TY.Tpointer) | |
| 636 t = t.toBasetype().nextOf(); // change struct* to struct | |
| 637 | |
| 638 if (t.mod != mod) | |
| 639 { | |
| 640 if (mod == MOD.MODconst) | |
| 641 match = MATCH.MATCHconst; | |
| 642 else | |
| 643 return MATCH.MATCHnomatch; | |
| 644 } | |
| 645 } | |
| 646 | |
|
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647 size_t nparams = Parameter.dim(parameters); |
| 0 | 648 size_t nargs = args ? args.dim : 0; |
| 649 if (nparams == nargs) { | |
| 650 ; | |
| 651 } else if (nargs > nparams) | |
| 652 { | |
| 653 if (varargs == 0) | |
| 654 goto Nomatch; // too many args; no match | |
| 655 match = MATCH.MATCHconvert; // match ... with a "conversion" match level | |
| 656 } | |
| 657 | |
| 658 for (size_t u = 0; u < nparams; u++) | |
| 659 { | |
| 660 MATCH m; | |
| 661 Expression arg; | |
| 662 | |
| 663 // BUG: what about out and ref? | |
| 664 | |
|
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665 auto p = Parameter.getNth(parameters, u); |
| 0 | 666 assert(p); |
| 667 if (u >= nargs) | |
| 668 { | |
| 669 if (p.defaultArg) | |
| 670 continue; | |
| 671 if (varargs == 2 && u + 1 == nparams) | |
| 672 goto L1; | |
| 673 goto Nomatch; // not enough arguments | |
| 674 } | |
| 675 | |
|
113
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More cleanup for arrays
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diff
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|
676 arg = cast(Expression)args[u]; |
| 0 | 677 assert(arg); |
| 96 | 678 // writef("arg: %s, type: %s\n", arg.toChars(), arg.type.toChars()); |
| 679 | |
| 0 | 680 |
| 681 // Non-lvalues do not match ref or out parameters | |
| 96 | 682 if (p.storageClass & (STC.STCref | STC.STCout)) |
| 683 { | |
| 684 if (!arg.isLvalue()) | |
| 685 goto Nomatch; | |
| 686 } | |
| 687 | |
| 688 if (p.storageClass & STCref) | |
| 689 { | |
| 690 /* Don't allow static arrays to be passed to mutable refereces | |
| 691 * to static arrays if the argument cannot be modified. | |
| 692 */ | |
| 693 Type targb = arg.type.toBasetype(); | |
| 694 Type tparb = p.type.toBasetype(); | |
| 695 //writef("%s\n", targb.toChars()); | |
| 696 //writef("%s\n", tparb.toChars()); | |
| 697 if (targb.nextOf() && tparb.ty == Tsarray && | |
| 698 targb.nextOf().mod != tparb.nextOf().mod && | |
| 699 !tparb.nextOf().isConst()) | |
| 700 goto Nomatch; | |
| 701 } | |
| 0 | 702 |
| 703 if (p.storageClass & STC.STClazy && p.type.ty == TY.Tvoid && arg.type.ty != TY.Tvoid) | |
| 704 m = MATCH.MATCHconvert; | |
| 705 else | |
| 706 m = arg.implicitConvTo(p.type); | |
| 707 //printf("\tm = %d\n", m); | |
| 708 if (m == MATCH.MATCHnomatch) // if no match | |
| 709 { | |
| 710 L1: | |
| 711 if (varargs == 2 && u + 1 == nparams) // if last varargs param | |
| 712 { | |
| 713 Type tb = p.type.toBasetype(); | |
| 714 TypeSArray tsa; | |
| 715 long sz; | |
| 716 | |
| 717 switch (tb.ty) | |
| 718 { | |
| 719 case TY.Tsarray: | |
| 720 tsa = cast(TypeSArray)tb; | |
| 721 sz = tsa.dim.toInteger(); | |
| 722 if (sz != nargs - u) | |
| 723 goto Nomatch; | |
| 724 case TY.Tarray: | |
| 725 { | |
| 726 TypeArray ta = cast(TypeArray)tb; | |
| 727 for (; u < nargs; u++) | |
| 728 { | |
|
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729 arg = cast(Expression)args[u]; |
| 0 | 730 assert(arg); |
| 731 static if (true) { | |
| 732 /* If lazy array of delegates, | |
| 733 * convert arg(s) to delegate(s) | |
| 734 */ | |
| 735 Type tret = p.isLazyArray(); | |
| 736 if (tret) | |
| 737 { | |
| 738 if (ta.next.equals(arg.type)) | |
| 739 { | |
| 740 m = MATCH.MATCHexact; | |
| 741 } | |
| 742 else | |
| 743 { | |
| 744 m = arg.implicitConvTo(tret); | |
| 745 if (m == MATCH.MATCHnomatch) | |
| 746 { | |
| 747 if (tret.toBasetype().ty == TY.Tvoid) | |
| 748 m = MATCH.MATCHconvert; | |
| 749 } | |
| 750 } | |
| 751 } | |
| 752 else | |
| 753 m = arg.implicitConvTo(ta.next); | |
| 754 } else { | |
| 755 m = arg.implicitConvTo(ta.next); | |
| 756 } | |
| 757 if (m == MATCH.MATCHnomatch) | |
| 758 goto Nomatch; | |
| 759 | |
| 760 if (m < match) | |
| 761 match = m; | |
| 762 } | |
| 763 goto Ldone; | |
| 764 } | |
| 765 | |
| 766 case TY.Tclass: | |
| 767 // Should see if there's a constructor match? | |
| 768 // Or just leave it ambiguous? | |
| 769 goto Ldone; | |
| 770 | |
| 771 default: | |
| 772 goto Nomatch; | |
| 773 } | |
| 774 } | |
| 775 | |
| 776 goto Nomatch; | |
| 777 } | |
| 778 | |
| 779 if (m < match) | |
| 780 match = m; // pick worst match | |
| 781 } | |
| 782 | |
| 783 Ldone: | |
| 784 //printf("match = %d\n", match); | |
| 785 return match; | |
| 786 | |
| 787 Nomatch: | |
| 788 //printf("no match\n"); | |
| 789 return MATCH.MATCHnomatch; | |
| 790 } | |
| 791 | |
| 96 | 792 override type* toCtype() |
| 0 | 793 { |
| 794 if (ctype) { | |
| 795 return ctype; | |
| 796 } | |
| 797 | |
| 798 type* t; | |
| 799 if (true) | |
| 800 { | |
| 801 param_t* paramtypes; | |
| 802 tym_t tyf; | |
| 803 type* tp; | |
| 804 | |
| 805 paramtypes = null; | |
|
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806 size_t nparams = Parameter.dim(parameters); |
| 0 | 807 for (size_t i = 0; i < nparams; i++) |
| 808 { | |
|
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809 auto arg = Parameter.getNth(parameters, i); |
| 0 | 810 tp = arg.type.toCtype(); |
| 811 if (arg.storageClass & (STC.STCout | STC.STCref)) | |
| 812 { | |
| 813 // C doesn't have reference types, so it's really a pointer | |
| 814 // to the parameter type | |
| 815 tp = type_allocn(TYM.TYref, tp); | |
| 816 } | |
| 817 param_append_type(¶mtypes,tp); | |
| 818 } | |
| 819 tyf = totym(); | |
| 820 t = type_alloc(tyf); | |
| 821 t.Tflags |= TF.TFprototype; | |
| 822 if (varargs != 1) | |
| 823 t.Tflags |= TF.TFfixed; | |
| 824 ctype = t; | |
| 825 t.Tnext = next.toCtype(); | |
| 826 t.Tnext.Tcount++; | |
| 827 t.Tparamtypes = paramtypes; | |
| 828 } | |
| 829 ctype = t; | |
| 830 return t; | |
| 831 } | |
| 832 | |
| 833 /*************************** | |
| 834 * Determine return style of function - whether in registers or | |
| 835 * through a hidden pointer to the caller's stack. | |
| 836 */ | |
| 96 | 837 RET retStyle() |
| 0 | 838 { |
| 839 //printf("TypeFunction.retStyle() %s\n", toChars()); | |
| 95 | 840 version (DMDV2) |
| 841 { | |
| 0 | 842 if (isref) |
| 843 return RET.RETregs; // returns a pointer | |
| 844 } | |
| 845 | |
| 846 Type tn = next.toBasetype(); | |
| 95 | 847 Type tns = tn; |
| 848 ulong sz = tn.size(); | |
| 0 | 849 |
| 95 | 850 version(SARRAYVALUE) |
| 851 { | |
| 852 if (tn.ty == Tsarray) | |
| 853 { | |
| 854 do | |
| 855 { | |
| 856 tns = tns.nextOf().toBasetype(); | |
| 857 } while (tns.ty == Tsarray); | |
| 858 if (tns.ty != Tstruct) | |
| 859 { | |
| 860 if (global.params.isLinux && linkage != LINKd) | |
| 861 {} | |
| 862 else | |
| 863 { | |
| 864 switch (sz) | |
| 865 { case 1: | |
| 866 case 2: | |
| 867 case 4: | |
| 868 case 8: | |
| 96 | 869 return RET.RETregs; // return small structs in regs |
| 870 // (not 3 byte structs!) | |
| 95 | 871 default: |
| 872 break; | |
| 873 } | |
| 874 } | |
| 96 | 875 return RET.RETstack; |
| 95 | 876 } |
| 877 } | |
| 878 } | |
| 879 if (tns.ty == TY.Tstruct) | |
| 0 | 880 { |
| 881 StructDeclaration sd = (cast(TypeStruct)tn).sym; | |
| 882 if (global.params.isLinux && linkage != LINK.LINKd) { | |
| 883 ; | |
| 884 } | |
| 95 | 885 ///version (DMDV2) { // TODO: |
| 886 else if (sd.dtor || sd.cpctor) | |
| 887 { | |
| 0 | 888 } |
| 889 ///} | |
| 890 else | |
| 891 { | |
| 95 | 892 switch (sz) |
| 0 | 893 { |
| 894 case 1: | |
| 895 case 2: | |
| 896 case 4: | |
| 897 case 8: | |
| 898 return RET.RETregs; // return small structs in regs | |
| 899 // (not 3 byte structs!) | |
| 900 default: | |
| 901 break; | |
| 902 } | |
| 903 } | |
| 904 return RET.RETstack; | |
| 905 } | |
| 906 else if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && | |
| 907 linkage == LINK.LINKc && | |
| 908 tn.iscomplex()) | |
| 909 { | |
| 910 if (tn.ty == TY.Tcomplex32) | |
| 911 return RET.RETregs; // in EDX:EAX, not ST1:ST0 | |
| 912 else | |
| 913 return RET.RETstack; | |
| 914 } | |
| 915 else | |
| 916 return RET.RETregs; | |
| 917 } | |
| 918 | |
| 72 | 919 override TYM totym() |
| 0 | 920 { |
| 921 TYM tyf; | |
| 922 | |
| 923 //printf("TypeFunction.totym(), linkage = %d\n", linkage); | |
| 924 switch (linkage) | |
| 925 { | |
| 926 case LINK.LINKwindows: | |
| 927 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnsfunc; | |
| 928 break; | |
| 929 | |
| 930 case LINK.LINKpascal: | |
| 931 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnpfunc; | |
| 932 break; | |
| 933 | |
| 934 case LINK.LINKc: | |
| 935 tyf = TYM.TYnfunc; | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
936 version (POSIX) {///TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_SOLARIS |
| 0 | 937 if (retStyle() == RET.RETstack) |
| 938 tyf = TYM.TYhfunc; | |
| 939 } | |
| 940 break; | |
| 941 | |
| 942 case LINK.LINKd: | |
| 943 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYjfunc; | |
| 944 break; | |
| 945 | |
| 946 case LINK.LINKcpp: | |
| 947 tyf = TYM.TYnfunc; | |
| 948 break; | |
| 949 | |
| 950 default: | |
| 951 writef("linkage = %d\n", linkage); | |
| 952 assert(0); | |
| 953 } | |
| 954 version (DMDV2) { | |
| 955 if (isnothrow) | |
| 956 tyf |= mTY.mTYnothrow; | |
| 957 } | |
| 958 return tyf; | |
| 959 } | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
960 } |