Mercurial > projects > ddmd
annotate dmd/TypeFunction.d @ 132:c494af1dba80
Fixes for dmd 2.037
| author | Eldar Insafutdinov <e.insafutdinov@gmail.com> |
|---|---|
| date | Fri, 10 Sep 2010 19:14:09 +0100 |
| parents | 206db751bd4c |
| children | af1bebfd96a4 |
| 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 default: |
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326 } |
| 0 | 327 } |
| 328 // Write argument types | |
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329 Parameter.argsToDecoBuffer(buf, parameters); |
| 0 | 330 //if (buf.data[buf.offset - 1] == '@') halt(); |
| 331 buf.writeByte('Z' - varargs); // mark end of arg list | |
| 79 | 332 assert(next); |
| 0 | 333 next.toDecoBuffer(buf); |
| 334 inuse--; | |
| 335 } | |
| 336 | |
| 72 | 337 override void toCBuffer(OutBuffer buf, Identifier ident, HdrGenState* hgs) |
| 0 | 338 { |
| 339 //printf("TypeFunction.toCBuffer() this = %p\n", this); | |
| 340 string p = null; | |
| 341 | |
| 342 if (inuse) | |
| 343 { | |
| 344 inuse = 2; // flag error to caller | |
| 345 return; | |
| 346 } | |
| 347 inuse++; | |
| 348 | |
| 349 /* Use 'storage class' style for attributes | |
| 350 */ | |
| 351 if (mod & MODconst) | |
| 352 buf.writestring("const "); | |
| 353 if (mod & MODinvariant) | |
| 354 buf.writestring("immutable "); | |
| 355 if (mod & MODshared) | |
| 356 buf.writestring("shared "); | |
| 357 | |
| 358 if (ispure) | |
| 359 buf.writestring("pure "); | |
| 360 if (isnothrow) | |
| 361 buf.writestring("nothrow "); | |
| 362 if (isproperty) | |
| 363 buf.writestring("@property "); | |
| 364 if (isref) | |
| 365 buf.writestring("ref "); | |
| 366 | |
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367 switch (trust) |
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368 { |
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369 case TRUST.TRUSTtrusted: |
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370 buf.writestring("@trusted "); |
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371 break; |
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372 |
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373 case TRUST.TRUSTsafe: |
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374 buf.writestring("@safe "); |
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375 break; |
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376 } |
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377 |
| 0 | 378 if (next && (!ident || ident.toHChars2() == ident.toChars())) |
| 379 next.toCBuffer2(buf, hgs, MODundefined); | |
| 380 if (hgs.ddoc != 1) | |
| 381 { | |
| 382 switch (linkage) | |
| 383 { | |
| 384 case LINKd: p = null; break; | |
| 73 | 385 case LINKc: p = " C"; break; |
| 386 case LINKwindows: p = " Windows"; break; | |
| 387 case LINKpascal: p = " Pascal"; break; | |
| 388 case LINKcpp: p = " C++"; break; | |
| 0 | 389 default: |
| 390 assert(0); | |
| 391 } | |
| 392 } | |
| 393 | |
| 394 if (!hgs.hdrgen && p) | |
| 395 buf.writestring(p); | |
| 396 if (ident) | |
| 397 { | |
| 398 buf.writeByte(' '); | |
| 399 buf.writestring(ident.toHChars2()); | |
| 400 } | |
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401 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 402 inuse--; |
| 403 } | |
| 404 | |
| 72 | 405 override void toCBuffer2(OutBuffer buf, HdrGenState* hgs, MOD mod) |
| 0 | 406 { |
| 407 //printf("TypeFunction::toCBuffer2() this = %p, ref = %d\n", this, isref); | |
| 408 string p; | |
| 409 | |
| 410 if (inuse) | |
| 411 { | |
| 412 inuse = 2; // flag error to caller | |
| 413 return; | |
| 414 } | |
| 415 | |
| 416 inuse++; | |
| 417 if (next) | |
| 418 next.toCBuffer2(buf, hgs, MODundefined); | |
| 419 | |
| 420 if (hgs.ddoc != 1) | |
| 421 { | |
| 422 switch (linkage) | |
| 423 { | |
| 424 case LINKd: p = null; break; | |
| 425 case LINKc: p = "C "; break; | |
| 426 case LINKwindows: p = "Windows "; break; | |
| 427 case LINKpascal: p = "Pascal "; break; | |
| 428 case LINKcpp: p = "C++ "; break; | |
| 429 default: assert(0); | |
| 430 } | |
| 431 } | |
| 432 | |
| 433 if (!hgs.hdrgen && p) | |
| 434 buf.writestring(p); | |
| 435 buf.writestring(" function"); | |
|
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436 Parameter.argsToCBuffer(buf, hgs, parameters, varargs); |
| 0 | 437 |
| 438 /* Use postfix style for attributes | |
| 439 */ | |
| 440 if (mod != this.mod) | |
| 441 { | |
| 442 modToBuffer(buf); | |
| 443 } | |
| 444 | |
| 445 if (ispure) | |
| 446 buf.writestring(" pure"); | |
| 447 if (isnothrow) | |
| 448 buf.writestring(" nothrow"); | |
| 449 if (isproperty) | |
| 450 buf.writestring(" @property"); | |
| 451 if (isref) | |
| 452 buf.writestring(" ref"); | |
| 453 | |
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454 switch (trust) |
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455 { |
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456 case TRUSTtrusted: |
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457 buf.writestring(" @trusted"); |
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458 break; |
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459 |
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460 case TRUSTsafe: |
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461 buf.writestring(" @safe"); |
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462 break; |
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463 } |
| 0 | 464 inuse--; |
| 465 } | |
| 466 | |
| 72 | 467 override MATCH deduceType(Scope sc, Type tparam, TemplateParameters parameters, Objects dedtypes) |
| 0 | 468 { |
| 123 | 469 //printf("TypeFunction.deduceType()\n"); |
| 470 //printf("\tthis = %d, ", ty); print(); | |
| 471 //printf("\ttparam = %d, ", tparam.ty); tparam.print(); | |
| 472 | |
| 473 // Extra check that function characteristics must match | |
| 474 if (tparam && tparam.ty == Tfunction) | |
| 475 { | |
| 476 TypeFunction tp = cast(TypeFunction)tparam; | |
| 477 if (varargs != tp.varargs || | |
| 478 linkage != tp.linkage) | |
| 479 return MATCHnomatch; | |
| 480 | |
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481 size_t nfargs = Parameter.dim(this.parameters); |
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482 size_t nfparams = Parameter.dim(tp.parameters); |
| 123 | 483 |
| 484 /* See if tuple match | |
| 485 */ | |
| 486 if (nfparams > 0 && nfargs >= nfparams - 1) | |
| 487 { | |
| 488 /* See if 'A' of the template parameter matches 'A' | |
| 489 * of the type of the last function parameter. | |
| 490 */ | |
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491 auto fparam = Parameter.getNth(tp.parameters, nfparams - 1); |
| 123 | 492 assert(fparam); |
| 493 assert(fparam.type); | |
| 494 if (fparam.type.ty != Tident) | |
| 495 goto L1; | |
| 496 TypeIdentifier tid = cast(TypeIdentifier)fparam.type; | |
| 497 if (tid.idents.dim) | |
| 498 goto L1; | |
| 499 | |
| 500 /* Look through parameters to find tuple matching tid.ident | |
| 501 */ | |
| 502 size_t tupi = 0; | |
| 503 for (; 1; tupi++) | |
| 504 { | |
| 505 if (tupi == parameters.dim) | |
| 506 goto L1; | |
| 507 TemplateParameter t = parameters[tupi]; | |
| 508 TemplateTupleParameter tup = t.isTemplateTupleParameter(); | |
| 509 if (tup && tup.ident.equals(tid.ident)) | |
| 510 break; | |
| 511 } | |
| 512 | |
| 513 /* The types of the function arguments [nfparams - 1 .. nfargs] | |
| 514 * now form the tuple argument. | |
| 515 */ | |
| 516 int tuple_dim = nfargs - (nfparams - 1); | |
| 517 | |
| 518 /* See if existing tuple, and whether it matches or not | |
| 519 */ | |
| 520 Object o = dedtypes[tupi]; | |
| 521 if (o) | |
| 522 { | |
| 523 // Existing deduced argument must be a tuple, and must match | |
| 524 Tuple t = isTuple(o); | |
| 525 if (!t || t.objects.dim != tuple_dim) | |
| 526 return MATCHnomatch; | |
| 527 for (size_t i = 0; i < tuple_dim; i++) | |
| 528 { | |
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529 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 530 if (!arg.type.equals(t.objects[i])) |
| 531 return MATCHnomatch; | |
| 532 } | |
| 533 } | |
| 534 else | |
| 535 { // Create new tuple | |
| 536 Tuple t = new Tuple(); | |
| 537 t.objects.setDim(tuple_dim); | |
| 538 for (size_t i = 0; i < tuple_dim; i++) | |
| 539 { | |
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540 auto arg = Parameter.getNth(this.parameters, nfparams - 1 + i); |
| 123 | 541 t.objects[i] = arg.type; |
| 542 } | |
| 543 dedtypes[tupi] = t; | |
| 544 } | |
| 545 nfparams--; // don't consider the last parameter for type deduction | |
| 546 goto L2; | |
| 547 } | |
| 548 | |
| 549 L1: | |
| 550 if (nfargs != nfparams) | |
| 551 return MATCHnomatch; | |
| 552 L2: | |
| 553 for (size_t i = 0; i < nfparams; i++) | |
| 554 { | |
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555 auto a = Parameter.getNth(this.parameters, i); |
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556 auto ap = Parameter.getNth(tp.parameters, i); |
| 123 | 557 if (a.storageClass != ap.storageClass || |
| 558 !a.type.deduceType(sc, ap.type, parameters, dedtypes)) | |
| 559 return MATCHnomatch; | |
| 560 } | |
| 561 } | |
| 562 return Type.deduceType(sc, tparam, parameters, dedtypes); | |
| 0 | 563 } |
| 564 | |
| 72 | 565 override TypeInfoDeclaration getTypeInfoDeclaration() |
| 0 | 566 { |
| 129 | 567 return new TypeInfoFunctionDeclaration(this); |
| 0 | 568 } |
| 569 | |
| 72 | 570 override Type reliesOnTident() |
| 0 | 571 { |
| 572 if (parameters) | |
| 573 { | |
|
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574 foreach (arg; parameters) |
| 0 | 575 { |
| 576 Type t = arg.type.reliesOnTident(); | |
| 577 if (t) | |
| 578 return t; | |
| 579 } | |
| 580 } | |
| 581 return next.reliesOnTident(); | |
| 582 } | |
| 583 | |
| 584 version (CPP_MANGLE) { | |
| 585 void toCppMangle(OutBuffer buf, CppMangleState* cms) | |
| 586 { | |
| 587 assert(false); | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 /*************************** | |
| 592 * Examine function signature for parameter p and see if | |
| 593 * p can 'escape' the scope of the function. | |
| 594 */ | |
|
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595 bool parameterEscapes(Parameter p) |
| 0 | 596 { |
| 597 /* Scope parameters do not escape. | |
| 598 * Allow 'lazy' to imply 'scope' - | |
| 599 * lazy parameters can be passed along | |
| 600 * as lazy parameters to the next function, but that isn't | |
| 601 * escaping. | |
| 602 */ | |
| 603 if (p.storageClass & (STC.STCscope | STC.STClazy)) | |
| 604 return false; | |
| 605 | |
| 606 if (ispure) | |
| 607 { /* With pure functions, we need only be concerned if p escapes | |
| 608 * via any return statement. | |
| 609 */ | |
| 610 Type tret = nextOf().toBasetype(); | |
| 611 if (!isref && !tret.hasPointers()) | |
| 612 { /* The result has no references, so p could not be escaping | |
| 613 * that way. | |
| 614 */ | |
| 615 return false; | |
| 616 } | |
| 617 } | |
| 618 | |
| 619 /* Assume it escapes in the absence of better information. | |
| 620 */ | |
| 621 return true; | |
| 622 } | |
| 623 | |
| 624 /******************************** | |
| 625 * 'args' are being matched to function 'this' | |
| 626 * Determine match level. | |
| 627 * Returns: | |
| 628 * MATCHxxxx | |
| 629 */ | |
| 630 MATCH callMatch(Expression ethis, Expressions args) | |
| 631 { | |
| 632 //printf("TypeFunction.callMatch() %s\n", toChars()); | |
| 633 MATCH match = MATCH.MATCHexact; // assume exact match | |
| 634 | |
| 635 if (ethis) | |
| 636 { | |
| 637 Type t = ethis.type; | |
| 638 if (t.toBasetype().ty == TY.Tpointer) | |
| 639 t = t.toBasetype().nextOf(); // change struct* to struct | |
| 640 | |
| 641 if (t.mod != mod) | |
| 642 { | |
| 643 if (mod == MOD.MODconst) | |
| 644 match = MATCH.MATCHconst; | |
| 645 else | |
| 646 return MATCH.MATCHnomatch; | |
| 647 } | |
| 648 } | |
| 649 | |
|
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650 size_t nparams = Parameter.dim(parameters); |
| 0 | 651 size_t nargs = args ? args.dim : 0; |
| 652 if (nparams == nargs) { | |
| 653 ; | |
| 654 } else if (nargs > nparams) | |
| 655 { | |
| 656 if (varargs == 0) | |
| 657 goto Nomatch; // too many args; no match | |
| 658 match = MATCH.MATCHconvert; // match ... with a "conversion" match level | |
| 659 } | |
| 660 | |
| 661 for (size_t u = 0; u < nparams; u++) | |
| 662 { | |
| 663 MATCH m; | |
| 664 Expression arg; | |
| 665 | |
| 666 // BUG: what about out and ref? | |
| 667 | |
|
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|
668 auto p = Parameter.getNth(parameters, u); |
| 0 | 669 assert(p); |
| 670 if (u >= nargs) | |
| 671 { | |
| 672 if (p.defaultArg) | |
| 673 continue; | |
| 674 if (varargs == 2 && u + 1 == nparams) | |
| 675 goto L1; | |
| 676 goto Nomatch; // not enough arguments | |
| 677 } | |
| 678 | |
|
113
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More cleanup for arrays
Eldar Insafutdinov <e.insafutdinov@gmail.com>
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96
diff
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|
679 arg = cast(Expression)args[u]; |
| 0 | 680 assert(arg); |
| 96 | 681 // writef("arg: %s, type: %s\n", arg.toChars(), arg.type.toChars()); |
| 682 | |
| 0 | 683 |
| 684 // Non-lvalues do not match ref or out parameters | |
| 96 | 685 if (p.storageClass & (STC.STCref | STC.STCout)) |
| 686 { | |
| 687 if (!arg.isLvalue()) | |
| 688 goto Nomatch; | |
| 689 } | |
| 690 | |
| 691 if (p.storageClass & STCref) | |
| 692 { | |
| 693 /* Don't allow static arrays to be passed to mutable refereces | |
| 694 * to static arrays if the argument cannot be modified. | |
| 695 */ | |
| 696 Type targb = arg.type.toBasetype(); | |
| 697 Type tparb = p.type.toBasetype(); | |
| 698 //writef("%s\n", targb.toChars()); | |
| 699 //writef("%s\n", tparb.toChars()); | |
| 700 if (targb.nextOf() && tparb.ty == Tsarray && | |
| 701 targb.nextOf().mod != tparb.nextOf().mod && | |
| 702 !tparb.nextOf().isConst()) | |
| 703 goto Nomatch; | |
| 704 } | |
| 0 | 705 |
| 706 if (p.storageClass & STC.STClazy && p.type.ty == TY.Tvoid && arg.type.ty != TY.Tvoid) | |
| 707 m = MATCH.MATCHconvert; | |
| 708 else | |
| 709 m = arg.implicitConvTo(p.type); | |
| 710 //printf("\tm = %d\n", m); | |
| 711 if (m == MATCH.MATCHnomatch) // if no match | |
| 712 { | |
| 713 L1: | |
| 714 if (varargs == 2 && u + 1 == nparams) // if last varargs param | |
| 715 { | |
| 716 Type tb = p.type.toBasetype(); | |
| 717 TypeSArray tsa; | |
| 718 long sz; | |
| 719 | |
| 720 switch (tb.ty) | |
| 721 { | |
| 722 case TY.Tsarray: | |
| 723 tsa = cast(TypeSArray)tb; | |
| 724 sz = tsa.dim.toInteger(); | |
| 725 if (sz != nargs - u) | |
| 726 goto Nomatch; | |
| 727 case TY.Tarray: | |
| 728 { | |
| 729 TypeArray ta = cast(TypeArray)tb; | |
| 730 for (; u < nargs; u++) | |
| 731 { | |
|
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732 arg = cast(Expression)args[u]; |
| 0 | 733 assert(arg); |
| 734 static if (true) { | |
| 735 /* If lazy array of delegates, | |
| 736 * convert arg(s) to delegate(s) | |
| 737 */ | |
| 738 Type tret = p.isLazyArray(); | |
| 739 if (tret) | |
| 740 { | |
| 741 if (ta.next.equals(arg.type)) | |
| 742 { | |
| 743 m = MATCH.MATCHexact; | |
| 744 } | |
| 745 else | |
| 746 { | |
| 747 m = arg.implicitConvTo(tret); | |
| 748 if (m == MATCH.MATCHnomatch) | |
| 749 { | |
| 750 if (tret.toBasetype().ty == TY.Tvoid) | |
| 751 m = MATCH.MATCHconvert; | |
| 752 } | |
| 753 } | |
| 754 } | |
| 755 else | |
| 756 m = arg.implicitConvTo(ta.next); | |
| 757 } else { | |
| 758 m = arg.implicitConvTo(ta.next); | |
| 759 } | |
| 760 if (m == MATCH.MATCHnomatch) | |
| 761 goto Nomatch; | |
| 762 | |
| 763 if (m < match) | |
| 764 match = m; | |
| 765 } | |
| 766 goto Ldone; | |
| 767 } | |
| 768 | |
| 769 case TY.Tclass: | |
| 770 // Should see if there's a constructor match? | |
| 771 // Or just leave it ambiguous? | |
| 772 goto Ldone; | |
| 773 | |
| 774 default: | |
| 775 goto Nomatch; | |
| 776 } | |
| 777 } | |
| 778 | |
| 779 goto Nomatch; | |
| 780 } | |
| 781 | |
| 782 if (m < match) | |
| 783 match = m; // pick worst match | |
| 784 } | |
| 785 | |
| 786 Ldone: | |
| 787 //printf("match = %d\n", match); | |
| 788 return match; | |
| 789 | |
| 790 Nomatch: | |
| 791 //printf("no match\n"); | |
| 792 return MATCH.MATCHnomatch; | |
| 793 } | |
| 794 | |
| 96 | 795 override type* toCtype() |
| 0 | 796 { |
| 797 if (ctype) { | |
| 798 return ctype; | |
| 799 } | |
| 800 | |
| 801 type* t; | |
| 802 if (true) | |
| 803 { | |
| 804 param_t* paramtypes; | |
| 805 tym_t tyf; | |
| 806 type* tp; | |
| 807 | |
| 808 paramtypes = null; | |
|
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809 size_t nparams = Parameter.dim(parameters); |
| 0 | 810 for (size_t i = 0; i < nparams; i++) |
| 811 { | |
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812 auto arg = Parameter.getNth(parameters, i); |
| 0 | 813 tp = arg.type.toCtype(); |
| 814 if (arg.storageClass & (STC.STCout | STC.STCref)) | |
| 815 { | |
| 816 // C doesn't have reference types, so it's really a pointer | |
| 817 // to the parameter type | |
| 818 tp = type_allocn(TYM.TYref, tp); | |
| 819 } | |
| 820 param_append_type(¶mtypes,tp); | |
| 821 } | |
| 822 tyf = totym(); | |
| 823 t = type_alloc(tyf); | |
| 824 t.Tflags |= TF.TFprototype; | |
| 825 if (varargs != 1) | |
| 826 t.Tflags |= TF.TFfixed; | |
| 827 ctype = t; | |
| 828 t.Tnext = next.toCtype(); | |
| 829 t.Tnext.Tcount++; | |
| 830 t.Tparamtypes = paramtypes; | |
| 831 } | |
| 832 ctype = t; | |
| 833 return t; | |
| 834 } | |
| 835 | |
| 836 /*************************** | |
| 837 * Determine return style of function - whether in registers or | |
| 838 * through a hidden pointer to the caller's stack. | |
| 839 */ | |
| 96 | 840 RET retStyle() |
| 0 | 841 { |
| 842 //printf("TypeFunction.retStyle() %s\n", toChars()); | |
| 95 | 843 version (DMDV2) |
| 844 { | |
| 0 | 845 if (isref) |
| 846 return RET.RETregs; // returns a pointer | |
| 847 } | |
| 848 | |
| 849 Type tn = next.toBasetype(); | |
| 95 | 850 Type tns = tn; |
| 851 ulong sz = tn.size(); | |
| 0 | 852 |
| 95 | 853 version(SARRAYVALUE) |
| 854 { | |
| 855 if (tn.ty == Tsarray) | |
| 856 { | |
| 857 do | |
| 858 { | |
| 859 tns = tns.nextOf().toBasetype(); | |
| 860 } while (tns.ty == Tsarray); | |
| 861 if (tns.ty != Tstruct) | |
| 862 { | |
| 863 if (global.params.isLinux && linkage != LINKd) | |
| 864 {} | |
| 865 else | |
| 866 { | |
| 867 switch (sz) | |
| 868 { case 1: | |
| 869 case 2: | |
| 870 case 4: | |
| 871 case 8: | |
| 96 | 872 return RET.RETregs; // return small structs in regs |
| 873 // (not 3 byte structs!) | |
| 95 | 874 default: |
| 875 break; | |
| 876 } | |
| 877 } | |
| 96 | 878 return RET.RETstack; |
| 95 | 879 } |
| 880 } | |
| 881 } | |
| 882 if (tns.ty == TY.Tstruct) | |
| 0 | 883 { |
| 884 StructDeclaration sd = (cast(TypeStruct)tn).sym; | |
| 885 if (global.params.isLinux && linkage != LINK.LINKd) { | |
| 886 ; | |
| 887 } | |
| 95 | 888 ///version (DMDV2) { // TODO: |
| 889 else if (sd.dtor || sd.cpctor) | |
| 890 { | |
| 0 | 891 } |
| 892 ///} | |
| 893 else | |
| 894 { | |
| 95 | 895 switch (sz) |
| 0 | 896 { |
| 897 case 1: | |
| 898 case 2: | |
| 899 case 4: | |
| 900 case 8: | |
| 901 return RET.RETregs; // return small structs in regs | |
| 902 // (not 3 byte structs!) | |
| 903 default: | |
| 904 break; | |
| 905 } | |
| 906 } | |
| 907 return RET.RETstack; | |
| 908 } | |
| 909 else if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && | |
| 910 linkage == LINK.LINKc && | |
| 911 tn.iscomplex()) | |
| 912 { | |
| 913 if (tn.ty == TY.Tcomplex32) | |
| 914 return RET.RETregs; // in EDX:EAX, not ST1:ST0 | |
| 915 else | |
| 916 return RET.RETstack; | |
| 917 } | |
| 918 else | |
| 919 return RET.RETregs; | |
| 920 } | |
| 921 | |
| 72 | 922 override TYM totym() |
| 0 | 923 { |
| 924 TYM tyf; | |
| 925 | |
| 926 //printf("TypeFunction.totym(), linkage = %d\n", linkage); | |
| 927 switch (linkage) | |
| 928 { | |
| 929 case LINK.LINKwindows: | |
| 930 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnsfunc; | |
| 931 break; | |
| 932 | |
| 933 case LINK.LINKpascal: | |
| 934 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYnpfunc; | |
| 935 break; | |
| 936 | |
| 937 case LINK.LINKc: | |
| 938 tyf = TYM.TYnfunc; | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
939 version (POSIX) {///TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_SOLARIS |
| 0 | 940 if (retStyle() == RET.RETstack) |
| 941 tyf = TYM.TYhfunc; | |
| 942 } | |
| 943 break; | |
| 944 | |
| 945 case LINK.LINKd: | |
| 946 tyf = (varargs == 1) ? TYM.TYnfunc : TYM.TYjfunc; | |
| 947 break; | |
| 948 | |
| 949 case LINK.LINKcpp: | |
| 950 tyf = TYM.TYnfunc; | |
| 951 break; | |
| 952 | |
| 953 default: | |
| 954 writef("linkage = %d\n", linkage); | |
| 955 assert(0); | |
| 956 } | |
| 957 version (DMDV2) { | |
| 958 if (isnothrow) | |
| 959 tyf |= mTY.mTYnothrow; | |
| 960 } | |
| 961 return tyf; | |
| 962 } | |
|
22
fd4acc376c45
Implemented object file output and linking on linux.
Robert Clipsham <robert@octarineparrot.com>
parents:
0
diff
changeset
|
963 } |