Mercurial > projects > ddmd
annotate dmd/TypeFunction.d @ 131:206db751bd4c
dmdfe 2.037 compiles now
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Fri, 10 Sep 2010 00:27:37 +0100 |
| parents | 60bb0fe4563e |
| children | c494af1dba80 |
| 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; |
| 123 | 37 import dmd.TemplateInstance : isTuple; |
| 0 | 38 |
| 39 import dmd.backend.TYPE; | |
| 40 import dmd.backend.PARAM; | |
| 41 import dmd.backend.Util; | |
| 42 import dmd.backend.TYM; | |
| 43 import dmd.backend.TF; | |
| 44 import dmd.backend.mTY; | |
| 45 | |
| 46 import core.stdc.stdlib; | |
| 47 import core.stdc.string; | |
| 48 | |
| 129 | 49 import std.stdio; |
| 50 | |
| 0 | 51 class TypeFunction : TypeNext |
| 52 { | |
| 53 // .next is the return type | |
| 54 | |
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55 Parameters parameters; // function parameters |
| 0 | 56 int varargs; // 1: T t, ...) style for variable number of arguments |
| 57 // 2: T t ...) style for variable number of arguments | |
| 58 bool isnothrow; // true: nothrow | |
| 59 bool ispure; // true: pure | |
| 60 bool isproperty; // can be called without parentheses | |
| 61 bool isref; // true: returns a reference | |
| 62 LINK linkage; // calling convention | |
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63 TRUST trust; // level of trust |
| 0 | 64 |
| 65 int inuse; | |
| 66 | |
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67 this(Parameters parameters, Type treturn, int varargs, LINK linkage) |
| 0 | 68 { |
| 69 super(TY.Tfunction, treturn); | |
| 70 | |
| 71 //if (!treturn) *(char*)0=0; | |
| 72 // assert(treturn); | |
| 73 assert(0 <= varargs && varargs <= 2); | |
| 74 this.parameters = parameters; | |
| 75 this.varargs = varargs; | |
| 76 this.linkage = linkage; | |
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77 this.trust = TRUSTdefault; |
| 0 | 78 } |
| 79 | |
| 72 | 80 override Type syntaxCopy() |
| 0 | 81 { |
| 82 Type treturn = next ? next.syntaxCopy() : null; | |
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83 auto params = Parameter.arraySyntaxCopy(parameters); |
| 0 | 84 TypeFunction t = new TypeFunction(params, treturn, varargs, linkage); |
| 85 t.mod = mod; | |
| 86 t.isnothrow = isnothrow; | |
| 87 t.ispure = ispure; | |
| 88 t.isproperty = isproperty; | |
| 89 t.isref = isref; | |
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90 t.trust = trust; |
| 0 | 91 |
| 92 return t; | |
| 93 } | |
| 94 | |
| 95 version (DumbClone) { | |
| 96 } else { | |
| 97 final TypeFunction cloneTo(TypeFunction t) | |
| 98 { | |
| 99 super.cloneTo(t); | |
| 100 | |
| 101 // these 3 should be set by ctor | |
| 102 assert(t.parameters is null); | |
| 103 assert(t.varargs == varargs); | |
| 104 assert(t.linkage == linkage); | |
| 105 | |
| 106 t.isnothrow = isnothrow; | |
| 107 t.ispure = ispure; | |
| 108 t.isproperty = isproperty; | |
| 109 t.isref = isref; | |
| 110 t.inuse = inuse; | |
| 111 | |
| 112 if (parameters) | |
| 113 { | |
| 114 t.parameters = parameters.copy(); | |
| 129 | 115 foreach (arg; parameters) |
| 0 | 116 { |
| 117 Argument cpy = arg.clone(); | |
| 129 | 118 t.parameters[i] = cpy; |
| 0 | 119 } |
| 120 } | |
| 121 | |
| 122 return t; | |
| 123 } | |
| 124 | |
| 125 TypeFunction clone() | |
| 126 { | |
| 129 | 127 assert(this.classinfo is TypeFunction.classinfo); |
| 0 | 128 return cloneTo(new TypeFunction(null, next, varargs, linkage)); |
| 129 } | |
| 130 } | |
| 72 | 131 override Type semantic(Loc loc, Scope sc) |
| 0 | 132 { |
| 133 if (deco) // if semantic() already run | |
| 134 { | |
| 135 //printf("already done\n"); | |
| 136 return this; | |
| 137 } | |
| 138 //printf("TypeFunction.semantic() this = %p\n", this); | |
| 139 //printf("TypeFunction.semantic() %s, sc.stc = %x\n", toChars(), sc.stc); | |
| 140 | |
| 141 /* Copy in order to not mess up original. | |
| 142 * This can produce redundant copies if inferring return type, | |
| 143 * as semantic() will get called again on this. | |
| 144 */ | |
| 145 | |
| 129 | 146 TypeFunction tf = cloneThis(this); |
| 0 | 147 |
| 148 if (sc.stc & STC.STCpure) | |
| 149 tf.ispure = true; | |
| 150 if (sc.stc & STC.STCnothrow) | |
| 151 tf.isnothrow = true; | |
| 152 if (sc.stc & STC.STCref) | |
| 153 tf.isref = true; | |
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154 if (sc.stc & STCsafe) |
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155 tf.trust = TRUST.TRUSTsafe; |
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156 if (sc.stc & STCtrusted) |
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157 tf.trust = TRUST.TRUSTtrusted; |
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158 if (sc.stc & STCproperty) |
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159 tf.isproperty = true; |
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160 |
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161 tf.linkage = sc.linkage; |
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162 |
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163 /* If the parent is @safe, then this function defaults to safe |
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164 * too. |
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165 */ |
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166 if (tf.trust == TRUST.TRUSTdefault) |
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167 for (Dsymbol p = sc.func; p; p = p.toParent2()) |
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168 { FuncDeclaration fd = p.isFuncDeclaration(); |
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169 if (fd) |
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170 { |
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171 if (fd.isSafe()) |
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172 tf.trust = TRUST.TRUSTsafe; // default to @safe |
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173 break; |
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174 } |
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175 } |
| 0 | 176 |
| 177 if (tf.next) | |
| 178 { | |
| 179 tf.next = tf.next.semantic(loc,sc); | |
| 96 | 180 version(SARRAYVALUE) {} else |
| 181 { | |
| 0 | 182 if (tf.next.toBasetype().ty == TY.Tsarray) |
| 129 | 183 { |
| 184 error(loc, "functions cannot return static array %s", tf.next.toChars()); | |
| 0 | 185 tf.next = Type.terror; |
| 186 } | |
| 96 | 187 } |
| 0 | 188 if (tf.next.toBasetype().ty == TY.Tfunction) |
| 129 | 189 { |
| 190 error(loc, "functions cannot return a function"); | |
| 0 | 191 tf.next = Type.terror; |
| 192 } | |
| 193 if (tf.next.toBasetype().ty == TY.Ttuple) | |
| 129 | 194 { |
| 195 error(loc, "functions cannot return a tuple"); | |
| 0 | 196 tf.next = Type.terror; |
| 197 } | |
| 198 if (tf.next.isauto() && !(sc.flags & SCOPE.SCOPEctor)) | |
| 129 | 199 error(loc, "functions cannot return scope %s", tf.next.toChars()); |
| 0 | 200 } |
| 201 | |
| 202 if (tf.parameters) | |
| 73 | 203 { |
| 204 /* Create a scope for evaluating the default arguments for the parameters | |
| 205 */ | |
| 206 Scope argsc = sc.push(); | |
| 207 argsc.stc = STCundefined; // don't inherit storage class | |
| 208 argsc.protection = PROT.PROTpublic; | |
| 209 | |
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210 size_t dim = Parameter.dim(tf.parameters); |
| 0 | 211 |
| 212 for (size_t i = 0; i < dim; i++) | |
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213 { auto arg = Parameter.getNth(tf.parameters, i); |
| 0 | 214 |
| 215 tf.inuse++; | |
| 73 | 216 arg.type = arg.type.semantic(loc, argsc); |
| 0 | 217 if (tf.inuse == 1) tf.inuse--; |
| 218 | |
| 219 arg.type = arg.type.addStorageClass(arg.storageClass); | |
| 220 | |
| 221 if (arg.storageClass & (STC.STCauto | STC.STCalias | STC.STCstatic)) | |
| 222 { | |
| 223 if (!arg.type) | |
| 224 continue; | |
| 225 } | |
| 226 | |
| 227 Type t = arg.type.toBasetype(); | |
| 228 | |
| 229 if (arg.storageClass & (STC.STCout | STC.STCref | STC.STClazy)) | |
| 230 { | |
| 96 | 231 //if (t.ty == TY.Tsarray) |
| 232 //error(loc, "cannot have out or ref parameter of type %s", t.toChars()); | |
| 233 if (arg.storageClass & STC.STCout && arg.type.mod & (STCconst | STCimmutable)) | |
| 234 error(loc, "cannot have const or immutabl out parameter of type %s", t.toChars()); | |
| 0 | 235 } |
| 236 if (!(arg.storageClass & STC.STClazy) && t.ty == TY.Tvoid) | |
| 237 error(loc, "cannot have parameter of type %s", arg.type.toChars()); | |
| 238 | |
| 239 if (arg.defaultArg) | |
| 240 { | |
| 73 | 241 arg.defaultArg = arg.defaultArg.semantic(argsc); |
| 242 arg.defaultArg = resolveProperties(argsc, arg.defaultArg); | |
| 243 arg.defaultArg = arg.defaultArg.implicitCastTo(argsc, arg.type); | |
| 0 | 244 } |
| 245 | |
| 246 /* If arg turns out to be a tuple, the number of parameters may | |
| 247 * change. | |
| 248 */ | |
| 249 if (t.ty == TY.Ttuple) | |
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250 { dim = Parameter.dim(tf.parameters); |
| 0 | 251 i--; |
| 252 } | |
| 253 } | |
| 73 | 254 argsc.pop(); |
| 0 | 255 } |
| 256 if (tf.next) | |
| 257 tf.deco = tf.merge().deco; | |
| 258 | |
| 259 if (tf.inuse) | |
| 260 { error(loc, "recursive type"); | |
| 261 tf.inuse = 0; | |
| 262 return terror; | |
| 263 } | |
| 264 | |
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265 if (tf.isproperty && (tf.varargs || Parameter.dim(tf.parameters) > 1)) |
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266 error(loc, "properties can only have zero or one parameter"); |
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267 |
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268 if (tf.varargs == 1 && tf.linkage != LINK.LINKd && Parameter.dim(tf.parameters) == 0) |
| 0 | 269 error(loc, "variadic functions with non-D linkage must have at least one parameter"); |
| 270 | |
| 271 /* Don't return merge(), because arg identifiers and default args | |
| 272 * can be different | |
| 273 * even though the types match | |
| 274 */ | |
| 275 return tf; | |
| 276 } | |
| 277 | |
| 72 | 278 override void toDecoBuffer(OutBuffer buf, int flag) |
| 0 | 279 { |
| 280 ubyte mc; | |
| 281 | |
| 282 //printf("TypeFunction.toDecoBuffer() this = %p %s\n", this, toChars()); | |
| 283 //static int nest; if (++nest == 50) *(char*)0=0; | |
| 284 if (inuse) | |
| 285 { | |
| 286 inuse = 2; // flag error to caller | |
| 287 return; | |
| 288 } | |
| 289 inuse++; | |
| 290 static if (true) { | |
| 291 if (mod & MOD.MODshared) | |
| 292 buf.writeByte('O'); | |
| 293 if (mod & MOD.MODconst) | |
| 294 buf.writeByte('x'); | |
| 295 else if (mod & MOD.MODinvariant) | |
| 296 buf.writeByte('y'); | |
| 297 } | |
| 298 switch (linkage) | |
| 299 { | |
| 300 case LINK.LINKd: mc = 'F'; break; | |
| 301 case LINK.LINKc: mc = 'U'; break; | |
| 302 case LINK.LINKwindows: mc = 'W'; break; | |
| 303 case LINK.LINKpascal: mc = 'V'; break; | |
| 304 case LINK.LINKcpp: mc = 'R'; break; | |
| 305 } | |
| 306 buf.writeByte(mc); | |
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307 if (ispure || isnothrow || isproperty || isref || trust) |
| 0 | 308 { |
| 309 if (ispure) | |
| 310 buf.writestring("Na"); | |
| 311 if (isnothrow) | |
| 312 buf.writestring("Nb"); | |
| 313 if (isref) | |
| 314 buf.writestring("Nc"); | |
| 315 if (isproperty) | |
| 316 buf.writestring("Nd"); | |
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317 switch (trust) |
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318 { |
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319 case TRUST.TRUSTtrusted: |
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320 buf.writestring("Ne"); |
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321 break; |
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322 case TRUST.TRUSTsafe: |
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323 buf.writestring("Nd"); |
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324 break; |
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325 } |
| 0 | 326 } |
| 327 // Write argument types | |
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328 Parameter.argsToDecoBuffer(buf, parameters); |
| 0 | 329 //if (buf.data[buf.offset - 1] == '@') halt(); |
| 330 buf.writeByte('Z' - varargs); // mark end of arg list | |
| 79 | 331 assert(next); |
| 0 | 332 next.toDecoBuffer(buf); |
| 333 inuse--; | |
| 334 } | |
| 335 | |
| 72 | 336 override void toCBuffer(OutBuffer buf, Identifier ident, HdrGenState* hgs) |
| 0 | 337 { |
| 338 //printf("TypeFunction.toCBuffer() this = %p\n", this); | |
| 339 string p = null; | |
| 340 | |
| 341 if (inuse) | |
| 342 { | |
| 343 inuse = 2; // flag error to caller | |
| 344 return; | |
| 345 } | |
| 346 inuse++; | |
| 347 | |
| 348 /* Use 'storage class' style for attributes | |
| 349 */ | |
| 350 if (mod & MODconst) | |
| 351 buf.writestring("const "); | |
| 352 if (mod & MODinvariant) | |
| 353 buf.writestring("immutable "); | |
| 354 if (mod & MODshared) | |
| 355 buf.writestring("shared "); | |
| 356 | |
| 357 if (ispure) | |
| 358 buf.writestring("pure "); | |
| 359 if (isnothrow) | |
| 360 buf.writestring("nothrow "); | |
| 361 if (isproperty) | |
| 362 buf.writestring("@property "); | |
| 363 if (isref) | |
| 364 buf.writestring("ref "); | |
| 365 | |
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366 switch (trust) |
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367 { |
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368 case TRUST.TRUSTtrusted: |
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369 buf.writestring("@trusted "); |
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370 break; |
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371 |
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372 case TRUST.TRUSTsafe: |
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373 buf.writestring("@safe "); |
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374 break; |
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375 } |
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376 |
| 0 | 377 if (next && (!ident || ident.toHChars2() == ident.toChars())) |
| 378 next.toCBuffer2(buf, hgs, MODundefined); | |
| 379 if (hgs.ddoc != 1) | |
| 380 { | |
| 381 switch (linkage) | |
| 382 { | |
| 383 case LINKd: p = null; break; | |
| 73 | 384 case LINKc: p = " C"; break; |
| 385 case LINKwindows: p = " Windows"; break; | |
| 386 case LINKpascal: p = " Pascal"; break; | |
| 387 case LINKcpp: p = " C++"; break; | |
| 0 | 388 default: |
| 389 assert(0); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 if (!hgs.hdrgen && p) | |
| 394 buf.writestring(p); | |
| 395 if (ident) | |
| 396 { | |
| 397 buf.writeByte(' '); | |
| 398 buf.writestring(ident.toHChars2()); | |
| 399 } | |
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400 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 401 inuse--; |
| 402 } | |
| 403 | |
| 72 | 404 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod) |
| 0 | 405 { |
| 406 //printf("TypeFunction::toCBuffer2() this = %p, ref = %d\n", this, isref); | |
| 407 string p; | |
| 408 | |
| 409 if (inuse) | |
| 410 { | |
| 411 inuse = 2; // flag error to caller | |
| 412 return; | |
| 413 } | |
| 414 | |
| 415 inuse++; | |
| 416 if (next) | |
| 417 next.toCBuffer2(buf, hgs, MODundefined); | |
| 418 | |
| 419 if (hgs.ddoc != 1) | |
| 420 { | |
| 421 switch (linkage) | |
| 422 { | |
| 423 case LINKd: p = null; break; | |
| 424 case LINKc: p = "C "; break; | |
| 425 case LINKwindows: p = "Windows "; break; | |
| 426 case LINKpascal: p = "Pascal "; break; | |
| 427 case LINKcpp: p = "C++ "; break; | |
| 428 default: assert(0); | |
| 429 } | |
| 430 } | |
| 431 | |
| 432 if (!hgs.hdrgen && p) | |
| 433 buf.writestring(p); | |
| 434 buf.writestring(" function"); | |
|
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435 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 436 |
| 437 /* Use postfix style for attributes | |
| 438 */ | |
| 439 if (mod != this.mod) | |
| 440 { | |
| 441 modToBuffer(buf); | |
| 442 } | |
| 443 | |
| 444 if (ispure) | |
| 445 buf.writestring(" pure"); | |
| 446 if (isnothrow) | |
| 447 buf.writestring(" nothrow"); | |
| 448 if (isproperty) | |
| 449 buf.writestring(" @property"); | |
| 450 if (isref) | |
| 451 buf.writestring(" ref"); | |
| 452 | |
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453 switch (trust) |
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454 { |
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455 case TRUSTtrusted: |
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456 buf.writestring(" @trusted"); |
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457 break; |
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458 |
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459 case TRUSTsafe: |
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460 buf.writestring(" @safe"); |
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461 break; |
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462 } |
| 0 | 463 inuse--; |
| 464 } | |
| 465 | |
| 72 | 466 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes) |
| 0 | 467 { |
| 123 | 468 //printf("TypeFunction.deduceType()\n"); |
| 469 //printf("\tthis = %d, ", ty); print(); | |
| 470 //printf("\ttparam = %d, ", tparam.ty); tparam.print(); | |
| 471 | |
| 472 // Extra check that function characteristics must match | |
| 473 if (tparam && tparam.ty == Tfunction) | |
| 474 { | |
| 475 TypeFunction tp = cast(TypeFunction)tparam; | |
| 476 if (varargs != tp.varargs || | |
| 477 linkage != tp.linkage) | |
| 478 return MATCHnomatch; | |
| 479 | |
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480 size_t nfargs = Parameter.dim(this.parameters); |
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481 size_t nfparams = Parameter.dim(tp.parameters); |
| 123 | 482 |
| 483 /* See if tuple match | |
| 484 */ | |
| 485 if (nfparams > 0 && nfargs >= nfparams - 1) | |
| 486 { | |
| 487 /* See if 'A' of the template parameter matches 'A' | |
| 488 * of the type of the last function parameter. | |
| 489 */ | |
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490 auto fparam = Parameter.getNth(tp.parameters, nfparams - 1); |
| 123 | 491 assert(fparam); |
| 492 assert(fparam.type); | |
| 493 if (fparam.type.ty != Tident) | |
| 494 goto L1; | |
| 495 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 496 if (tid.idents.dim) | |
| 497 goto L1; | |
| 498 | |
| 499 /* Look through parameters to find tuple matching tid.ident | |
| 500 */ | |
| 501 size_t tupi = 0; | |
| 502 for (; 1; tupi++) | |
| 503 { | |
| 504 if (tupi == parameters.dim) | |
| 505 goto L1; | |
| 506 TemplateParameter t = parameters[tupi]; | |
| 507 TemplateTupleParameter tup = t.isTemplateTupleParameter(); | |
| 508 if (tup && tup.ident.equals(tid.ident)) | |
| 509 break; | |
| 510 } | |
| 511 | |
| 512 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
| 513 * now form the tuple argument. | |
| 514 */ | |
| 515 int tuple_dim = nfargs - (nfparams - 1); | |
| 516 | |
| 517 /* See if existing tuple, and whether it matches or not | |
| 518 */ | |
| 519 Object o = dedtypes[tupi]; | |
| 520 if (o) | |
| 521 { | |
| 522 // Existing deduced argument must be a tuple, and must match | |
| 523 Tuple t = isTuple(o); | |
| 524 if (!t || t.objects.dim != tuple_dim) | |
| 525 return MATCHnomatch; | |
| 526 for (size_t i = 0; i < tuple_dim; i++) | |
| 527 { | |
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528 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 529 if (!arg.type.equals(t.objects[i])) |
| 530 return MATCHnomatch; | |
| 531 } | |
| 532 } | |
| 533 else | |
| 534 { // Create new tuple | |
| 535 Tuple t = new Tuple(); | |
| 536 t.objects.setDim(tuple_dim); | |
| 537 for (size_t i = 0; i < tuple_dim; i++) | |
| 538 { | |
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539 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 540 t.objects[i] = arg.type; |
| 541 } | |
| 542 dedtypes[tupi] = t; | |
| 543 } | |
| 544 nfparams--; // don't consider the last parameter for type deduction | |
| 545 goto L2; | |
| 546 } | |
| 547 | |
| 548 L1: | |
| 549 if (nfargs != nfparams) | |
| 550 return MATCHnomatch; | |
| 551 L2: | |
| 552 for (size_t i = 0; i < nfparams; i++) | |
| 553 { | |
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554 auto a = Parameter.getNth(this.parameters, i); |
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555 auto ap = Parameter.getNth(tp.parameters, i); |
| 123 | 556 if (a.storageClass != ap.storageClass || |
| 557 !a.type.deduceType(sc, ap.type, parameters, dedtypes)) | |
| 558 return MATCHnomatch; | |
| 559 } | |
| 560 } | |
| 561 return Type.deduceType(sc, tparam, parameters, dedtypes); | |
| 0 | 562 } |
| 563 | |
| 72 | 564 override TypeInfoDeclaration getTypeInfoDeclaration() |
| 0 | 565 { |
| 129 | 566 return new TypeInfoFunctionDeclaration(this); |
| 0 | 567 } |
| 568 | |
| 72 | 569 override Type reliesOnTident() |
| 0 | 570 { |
| 571 if (parameters) | |
| 572 { | |
|
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573 foreach (arg; parameters) |
| 0 | 574 { |
| 575 Type t = arg.type.reliesOnTident(); | |
| 576 if (t) | |
| 577 return t; | |
| 578 } | |
| 579 } | |
| 580 return next.reliesOnTident(); | |
| 581 } | |
| 582 | |
| 583 version (CPP_MANGLE) { | |
| 584 void toCppMangle(OutBuffer buf, CppMangleState* cms) | |
| 585 { | |
| 586 assert(false); | |
| 587 } | |
| 588 } | |
| 589 | |
| 590 /*************************** | |
| 591 * Examine function signature for parameter p and see if | |
| 592 * p can 'escape' the scope of the function. | |
| 593 */ | |
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594 bool parameterEscapes(Parameter p) |
| 0 | 595 { |
| 596 /* Scope parameters do not escape. | |
| 597 * Allow 'lazy' to imply 'scope' - | |
| 598 * lazy parameters can be passed along | |
| 599 * as lazy parameters to the next function, but that isn't | |
| 600 * escaping. | |
| 601 */ | |
| 602 if (p.storageClass & (STC.STCscope | STC.STClazy)) | |
| 603 return false; | |
| 604 | |
| 605 if (ispure) | |
| 606 { /* With pure functions, we need only be concerned if p escapes | |
| 607 * via any return statement. | |
| 608 */ | |
| 609 Type tret = nextOf().toBasetype(); | |
| 610 if (!isref && !tret.hasPointers()) | |
| 611 { /* The result has no references, so p could not be escaping | |
| 612 * that way. | |
| 613 */ | |
| 614 return false; | |
| 615 } | |
| 616 } | |
| 617 | |
| 618 /* Assume it escapes in the absence of better information. | |
| 619 */ | |
| 620 return true; | |
| 621 } | |
| 622 | |
| 623 /******************************** | |
| 624 * 'args' are being matched to function 'this' | |
| 625 * Determine match level. | |
| 626 * Returns: | |
| 627 * MATCHxxxx | |
| 628 */ | |
| 629 MATCH callMatch(Expression ethis, Expressions args) | |
| 630 { | |
| 631 //printf("TypeFunction.callMatch() %s\n", toChars()); | |
| 632 MATCH match = MATCH.MATCHexact; // assume exact match | |
| 633 | |
| 634 if (ethis) | |
| 635 { | |
| 636 Type t = ethis.type; | |
| 637 if (t.toBasetype().ty == TY.Tpointer) | |
| 638 t = t.toBasetype().nextOf(); // change struct* to struct | |
| 639 | |
| 640 if (t.mod != mod) | |
| 641 { | |
| 642 if (mod == MOD.MODconst) | |
| 643 match = MATCH.MATCHconst; | |
| 644 else | |
| 645 return MATCH.MATCHnomatch; | |
| 646 } | |
| 647 } | |
| 648 | |
|
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649 size_t nparams = Parameter.dim(parameters); |
| 0 | 650 size_t nargs = args ? args.dim : 0; |
| 651 if (nparams == nargs) { | |
| 652 ; | |
| 653 } else if (nargs > nparams) | |
| 654 { | |
| 655 if (varargs == 0) | |
| 656 goto Nomatch; // too many args; no match | |
| 657 match = MATCH.MATCHconvert; // match ... with a "conversion" match level | |
| 658 } | |
| 659 | |
| 660 for (size_t u = 0; u < nparams; u++) | |
| 661 { | |
| 662 MATCH m; | |
| 663 Expression arg; | |
| 664 | |
| 665 // BUG: what about out and ref? | |
| 666 | |
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|
667 auto p = Parameter.getNth(parameters, u); |
| 0 | 668 assert(p); |
| 669 if (u >= nargs) | |
| 670 { | |
| 671 if (p.defaultArg) | |
| 672 continue; | |
| 673 if (varargs == 2 && u + 1 == nparams) | |
| 674 goto L1; | |
| 675 goto Nomatch; // not enough arguments | |
| 676 } | |
| 677 | |
|
113
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More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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diff
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|
678 arg = cast(Expression)args[u]; |
| 0 | 679 assert(arg); |
| 96 | 680 // writef("arg: %s, type: %s\n", arg.toChars(), arg.type.toChars()); |
| 681 | |
| 0 | 682 |
| 683 // Non-lvalues do not match ref or out parameters | |
| 96 | 684 if (p.storageClass & (STC.STCref | STC.STCout)) |
| 685 { | |
| 686 if (!arg.isLvalue()) | |
| 687 goto Nomatch; | |
| 688 } | |
| 689 | |
| 690 if (p.storageClass & STCref) | |
| 691 { | |
| 692 /* Don't allow static arrays to be passed to mutable refereces | |
| 693 * to static arrays if the argument cannot be modified. | |
| 694 */ | |
| 695 Type targb = arg.type.toBasetype(); | |
| 696 Type tparb = p.type.toBasetype(); | |
| 697 //writef("%s\n", targb.toChars()); | |
| 698 //writef("%s\n", tparb.toChars()); | |
| 699 if (targb.nextOf() && tparb.ty == Tsarray && | |
| 700 targb.nextOf().mod != tparb.nextOf().mod && | |
| 701 !tparb.nextOf().isConst()) | |
| 702 goto Nomatch; | |
| 703 } | |
| 0 | 704 |
| 705 if (p.storageClass & STC.STClazy && p.type.ty == TY.Tvoid && arg.type.ty != TY.Tvoid) | |
| 706 m = MATCH.MATCHconvert; | |
| 707 else | |
| 708 m = arg.implicitConvTo(p.type); | |
| 709 //printf("\tm = %d\n", m); | |
| 710 if (m == MATCH.MATCHnomatch) // if no match | |
| 711 { | |
| 712 L1: | |
| 713 if (varargs == 2 && u + 1 == nparams) // if last varargs param | |
| 714 { | |
| 715 Type tb = p.type.toBasetype(); | |
| 716 TypeSArray tsa; | |
| 717 long sz; | |
| 718 | |
| 719 switch (tb.ty) | |
| 720 { | |
| 721 case TY.Tsarray: | |
| 722 tsa = cast(TypeSArray)tb; | |
| 723 sz = tsa.dim.toInteger(); | |
| 724 if (sz != nargs - u) | |
| 725 goto Nomatch; | |
| 726 case TY.Tarray: | |
| 727 { | |
| 728 TypeArray ta = cast(TypeArray)tb; | |
| 729 for (; u < nargs; u++) | |
| 730 { | |
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731 arg = cast(Expression)args[u]; |
| 0 | 732 assert(arg); |
| 733 static if (true) { | |
| 734 /* If lazy array of delegates, | |
| 735 * convert arg(s) to delegate(s) | |
| 736 */ | |
| 737 Type tret = p.isLazyArray(); | |
| 738 if (tret) | |
| 739 { | |
| 740 if (ta.next.equals(arg.type)) | |
| 741 { | |
| 742 m = MATCH.MATCHexact; | |
| 743 } | |
| 744 else | |
| 745 { | |
| 746 m = arg.implicitConvTo(tret); | |
| 747 if (m == MATCH.MATCHnomatch) | |
| 748 { | |
| 749 if (tret.toBasetype().ty == TY.Tvoid) | |
| 750 m = MATCH.MATCHconvert; | |
| 751 } | |
| 752 } | |
| 753 } | |
| 754 else | |
| 755 m = arg.implicitConvTo(ta.next); | |
| 756 } else { | |
| 757 m = arg.implicitConvTo(ta.next); | |
| 758 } | |
| 759 if (m == MATCH.MATCHnomatch) | |
| 760 goto Nomatch; | |
| 761 | |
| 762 if (m < match) | |
| 763 match = m; | |
| 764 } | |
| 765 goto Ldone; | |
| 766 } | |
| 767 | |
| 768 case TY.Tclass: | |
| 769 // Should see if there's a constructor match? | |
| 770 // Or just leave it ambiguous? | |
| 771 goto Ldone; | |
| 772 | |
| 773 default: | |
| 774 goto Nomatch; | |
| 775 } | |
| 776 } | |
| 777 | |
| 778 goto Nomatch; | |
| 779 } | |
| 780 | |
| 781 if (m < match) | |
| 782 match = m; // pick worst match | |
| 783 } | |
| 784 | |
| 785 Ldone: | |
| 786 //printf("match = %d\n", match); | |
| 787 return match; | |
| 788 | |
| 789 Nomatch: | |
| 790 //printf("no match\n"); | |
| 791 return MATCH.MATCHnomatch; | |
| 792 } | |
| 793 | |
| 96 | 794 override type* toCtype() |
| 0 | 795 { |
| 796 if (ctype) { | |
| 797 return ctype; | |
| 798 } | |
| 799 | |
| 800 type* t; | |
| 801 if (true) | |
| 802 { | |
| 803 param_t* paramtypes; | |
| 804 tym_t tyf; | |
| 805 type* tp; | |
| 806 | |
| 807 paramtypes = null; | |
|
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808 size_t nparams = Parameter.dim(parameters); |
| 0 | 809 for (size_t i = 0; i < nparams; i++) |
| 810 { | |
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811 auto arg = Parameter.getNth(parameters, i); |
| 0 | 812 tp = arg.type.toCtype(); |
| 813 if (arg.storageClass & (STC.STCout | STC.STCref)) | |
| 814 { | |
| 815 // C doesn't have reference types, so it's really a pointer | |
| 816 // to the parameter type | |
| 817 tp = type_allocn(TYM.TYref, tp); | |
| 818 } | |
| 819 param_append_type(¶mtypes,tp); | |
| 820 } | |
| 821 tyf = totym(); | |
| 822 t = type_alloc(tyf); | |
| 823 t.Tflags |= TF.TFprototype; | |
| 824 if (varargs != 1) | |
| 825 t.Tflags |= TF.TFfixed; | |
| 826 ctype = t; | |
| 827 t.Tnext = next.toCtype(); | |
| 828 t.Tnext.Tcount++; | |
| 829 t.Tparamtypes = paramtypes; | |
| 830 } | |
| 831 ctype = t; | |
| 832 return t; | |
| 833 } | |
| 834 | |
| 835 /*************************** | |
| 836 * Determine return style of function - whether in registers or | |
| 837 * through a hidden pointer to the caller's stack. | |
| 838 */ | |
| 96 | 839 RET retStyle() |
| 0 | 840 { |
| 841 //printf("TypeFunction.retStyle() %s\n", toChars()); | |
| 95 | 842 version (DMDV2) |
| 843 { | |
| 0 | 844 if (isref) |
| 845 return RET.RETregs; // returns a pointer | |
| 846 } | |
| 847 | |
| 848 Type tn = next.toBasetype(); | |
| 95 | 849 Type tns = tn; |
| 850 ulong sz = tn.size(); | |
| 0 | 851 |
| 95 | 852 version(SARRAYVALUE) |
| 853 { | |
| 854 if (tn.ty == Tsarray) | |
| 855 { | |
| 856 do | |
| 857 { | |
| 858 tns = tns.nextOf().toBasetype(); | |
| 859 } while (tns.ty == Tsarray); | |
| 860 if (tns.ty != Tstruct) | |
| 861 { | |
| 862 if (global.params.isLinux && linkage != LINKd) | |
| 863 {} | |
| 864 else | |
| 865 { | |
| 866 switch (sz) | |
| 867 { case 1: | |
| 868 case 2: | |
| 869 case 4: | |
| 870 case 8: | |
| 96 | 871 return RET.RETregs; // return small structs in regs |
| 872 // (not 3 byte structs!) | |
| 95 | 873 default: |
| 874 break; | |
| 875 } | |
| 876 } | |
| 96 | 877 return RET.RETstack; |
| 95 | 878 } |
| 879 } | |
| 880 } | |
| 881 if (tns.ty == TY.Tstruct) | |
| 0 | 882 { |
| 883 StructDeclaration sd = (cast(TypeStruct)tn).sym; | |
| 884 if (global.params.isLinux && linkage != LINK.LINKd) { | |
| 885 ; | |
| 886 } | |
| 95 | 887 ///version (DMDV2) { // TODO: |
| 888 else if (sd.dtor || sd.cpctor) | |
| 889 { | |
| 0 | 890 } |
| 891 ///} | |
| 892 else | |
| 893 { | |
| 95 | 894 switch (sz) |
| 0 | 895 { |
| 896 case 1: | |
| 897 case 2: | |
| 898 case 4: | |
| 899 case 8: | |
| 900 return RET.RETregs; // return small structs in regs | |
| 901 // (not 3 byte structs!) | |
| 902 default: | |
| 903 break; | |
| 904 } | |
| 905 } | |
| 906 return RET.RETstack; | |
| 907 } | |
| 908 else if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && | |
| 909 linkage == LINK.LINKc && | |
| 910 tn.iscomplex()) | |
| 911 { | |
| 912 if (tn.ty == TY.Tcomplex32) | |
| 913 return RET.RETregs; // in EDX:EAX, not ST1:ST0 | |
| 914 else | |
| 915 return RET.RETstack; | |
| 916 } | |
| 917 else | |
| 918 return RET.RETregs; | |
| 919 } | |
| 920 | |
| 72 | 921 override TYM totym() |
| 0 | 922 { |
| 923 TYM tyf; | |
| 924 | |
| 925 //printf("TypeFunction.totym(), linkage = %d\n", linkage); | |
| 926 switch (linkage) | |
| 927 { | |
| 928 case LINK.LINKwindows: | |
| 929 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnsfunc; | |
| 930 break; | |
| 931 | |
| 932 case LINK.LINKpascal: | |
| 933 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnpfunc; | |
| 934 break; | |
| 935 | |
| 936 case LINK.LINKc: | |
| 937 tyf = TYM.TYnfunc; | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
938 version (POSIX) {///TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_SOLARIS |
| 0 | 939 if (retStyle() == RET.RETstack) |
| 940 tyf = TYM.TYhfunc; | |
| 941 } | |
| 942 break; | |
| 943 | |
| 944 case LINK.LINKd: | |
| 945 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYjfunc; | |
| 946 break; | |
| 947 | |
| 948 case LINK.LINKcpp: | |
| 949 tyf = TYM.TYnfunc; | |
| 950 break; | |
| 951 | |
| 952 default: | |
| 953 writef("linkage = %d\n", linkage); | |
| 954 assert(0); | |
| 955 } | |
| 956 version (DMDV2) { | |
| 957 if (isnothrow) | |
| 958 tyf |= mTY.mTYnothrow; | |
| 959 } | |
| 960 return tyf; | |
| 961 } | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
962 } |