Mercurial > projects > ddmd
annotate dmd/Expression.d @ 191:52188e7e3fb5
Fixed deprecated features, now compiles with DMD2.058
Also changed Array allocation policy:
Now doesn't reallocate but malloc's, followed by a memcpy (no free).
(this fixes a crash while compiling druntime. Same bug in dmd)
| author | korDen@korDen-pc |
|---|---|
| date | Sun, 25 Mar 2012 03:11:12 +0400 |
| parents | b0d41ff5e0df |
| children |
| rev | line source |
|---|---|
| 0 | 1 module dmd.Expression; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.TOK; | |
|
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6 import dmd.Parameter; |
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7 import dmd.IdentifierExp; |
| 0 | 8 import dmd.Type; |
| 9 import dmd.WANT; | |
| 10 import dmd.Scope; | |
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11 import dmd.Array; |
| 0 | 12 import dmd.ArrayTypes; |
| 13 import dmd.OutBuffer; | |
| 14 import dmd.HdrGenState; | |
| 15 import dmd.MATCH; | |
| 16 import dmd.IntRange; | |
| 17 import dmd.Dsymbol; | |
| 18 import dmd.FuncDeclaration; | |
| 19 import dmd.InterState; | |
| 20 import dmd.InlineCostState; | |
| 21 import dmd.InlineDoState; | |
| 22 import dmd.InlineScanState; | |
| 23 import dmd.Identifier; | |
| 24 import dmd.IRState; | |
| 25 import dmd.DotIdExp; | |
| 26 import dmd.TypeExp; | |
| 27 import dmd.DYNCAST; | |
| 28 import dmd.TY; | |
| 29 import dmd.CallExp; | |
| 30 import dmd.VarExp; | |
| 31 import dmd.STC; | |
| 32 import dmd.TemplateInstance; | |
| 33 import dmd.CommaExp; | |
| 34 import dmd.NullExp; | |
| 35 import dmd.AddrExp; | |
| 55 | 36 import dmd.LINK; |
| 37 import dmd.FuncExp; | |
| 38 import dmd.ReturnStatement; | |
| 39 import dmd.Statement; | |
| 40 import dmd.FuncLiteralDeclaration; | |
| 41 import dmd.TypeFunction; | |
| 0 | 42 import dmd.ErrorExp; |
| 43 import dmd.TypeStruct; | |
| 44 import dmd.CastExp; | |
| 45 import dmd.Global; | |
|
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46 import dmd.GlobalExpressions; |
| 0 | 47 import dmd.Token; |
| 48 import dmd.TypeClass; | |
| 49 import dmd.PtrExp; | |
| 50 import dmd.TypeSArray; | |
| 51 import dmd.TypeReference; | |
| 52 import dmd.Util; | |
| 53 import dmd.Complex; | |
| 54 | |
| 55 import dmd.backend.elem; | |
| 141 | 56 import dmd.backend.Util; |
| 0 | 57 import dmd.backend.dt_t; |
| 58 | |
|
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59 import dmd.DDMDExtensions; |
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60 |
| 4 | 61 import core.memory; |
| 2 | 62 |
| 0 | 63 import std.stdio : writef; |
| 64 | |
| 65 import std.conv; | |
| 66 | |
| 67 /* Things like: | |
| 68 * int.size | |
| 69 * foo.size | |
| 70 * (foo).size | |
| 71 * cast(foo).size | |
| 72 */ | |
| 73 | |
| 74 Expression typeDotIdExp(Loc loc, Type type, Identifier ident) | |
| 75 { | |
| 76 return new DotIdExp(loc, new TypeExp(loc, type), ident); | |
| 77 } | |
| 78 | |
| 79 /***************************************** | |
| 80 * Determine if 'this' is available. | |
| 81 * If it is, return the FuncDeclaration that has it. | |
| 82 */ | |
| 83 | |
| 84 FuncDeclaration hasThis(Scope sc) | |
| 85 { | |
| 86 FuncDeclaration fd; | |
| 87 FuncDeclaration fdthis; | |
| 88 | |
| 89 //printf("hasThis()\n"); | |
| 90 fdthis = sc.parent.isFuncDeclaration(); | |
| 91 //printf("fdthis = %p, '%s'\n", fdthis, fdthis ? fdthis.toChars() : ""); | |
| 92 | |
| 93 // Go upwards until we find the enclosing member function | |
| 94 fd = fdthis; | |
| 95 while (1) | |
| 96 { | |
| 97 if (!fd) | |
| 98 { | |
| 99 goto Lno; | |
| 100 } | |
| 101 if (!fd.isNested()) | |
| 102 break; | |
| 103 | |
| 104 Dsymbol parent = fd.parent; | |
| 105 while (parent) | |
| 106 { | |
| 107 TemplateInstance ti = parent.isTemplateInstance(); | |
| 108 if (ti) | |
| 109 parent = ti.parent; | |
| 110 else | |
| 111 break; | |
| 112 } | |
| 113 | |
| 114 fd = fd.parent.isFuncDeclaration(); | |
| 115 } | |
| 116 | |
| 117 if (!fd.isThis()) | |
| 118 { | |
| 119 //printf("test '%s'\n", fd.toChars()); | |
| 120 goto Lno; | |
| 121 } | |
| 122 | |
| 123 assert(fd.vthis); | |
| 124 return fd; | |
| 125 | |
| 126 Lno: | |
| 127 return null; // don't have 'this' available | |
| 128 } | |
| 129 | |
| 130 /*************************************** | |
| 131 * Pull out any properties. | |
| 132 */ | |
| 133 Expression resolveProperties(Scope sc, Expression e) | |
| 134 { | |
| 135 //printf("resolveProperties(%s)\n", e.toChars()); | |
| 136 if (e.type) | |
| 137 { | |
| 138 Type t = e.type.toBasetype(); | |
| 139 | |
| 140 if (t.ty == TY.Tfunction || e.op == TOK.TOKoverloadset) | |
| 141 { | |
| 109 | 142 static if(false) |
| 143 { | |
| 144 if (t.ty == Tfunction && !(cast(TypeFunction)t).isproperty) | |
| 145 error(e.loc, "not a property %s\n", e.toChars()); | |
| 146 } | |
| 0 | 147 e = new CallExp(e.loc, e); |
| 148 e = e.semantic(sc); | |
| 149 } | |
| 150 | |
| 151 /* Look for e being a lazy parameter; rewrite as delegate call | |
| 152 */ | |
| 153 else if (e.op == TOK.TOKvar) | |
| 154 { VarExp ve = cast(VarExp)e; | |
| 155 | |
| 156 if (ve.var.storage_class & STC.STClazy) | |
| 157 { | |
| 158 e = new CallExp(e.loc, e); | |
| 159 e = e.semantic(sc); | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 else if (e.op == TOK.TOKdotexp) | |
| 164 { | |
| 165 e.error("expression has no value"); | |
| 166 } | |
| 167 } | |
| 168 else if (e.op == TOK.TOKdottd) | |
| 169 { | |
| 170 e = new CallExp(e.loc, e); | |
| 171 e = e.semantic(sc); | |
| 172 } | |
| 173 | |
| 174 return e; | |
| 175 } | |
| 176 | |
| 95 | 177 void indent(int indent) |
| 178 { | |
| 179 foreach (i; 0 .. indent) | |
| 180 writef(" "); | |
| 181 } | |
| 182 | |
| 183 string type_print(Type type) | |
| 184 { | |
| 185 return type ? type.toChars() : "null"; | |
| 186 } | |
| 187 | |
| 178 | 188 import dmd.TObject; |
| 189 | |
| 190 class Expression : TObject | |
| 0 | 191 { |
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192 mixin insertMemberExtension!(typeof(this)); |
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193 |
| 0 | 194 Loc loc; // file location |
| 195 TOK op; // handy to minimize use of dynamic_cast | |
| 196 Type type; // !=null means that semantic() has been run | |
| 197 int size; // # of bytes in Expression so we can copy() it | |
| 198 | |
| 199 this(Loc loc, TOK op, int size) | |
| 200 { | |
| 178 | 201 register(); |
| 0 | 202 this.loc = loc; |
| 203 //writef("Expression.Expression(op = %d %s) this = %p\n", op, to!(string)(op), this); | |
| 204 this.op = op; | |
| 205 this.size = size; | |
| 206 type = null; | |
| 207 } | |
| 208 | |
| 45 | 209 bool equals(Object o) |
| 0 | 210 { |
| 211 return this is o; | |
| 212 } | |
| 213 | |
| 214 /********************************* | |
| 215 * Does *not* do a deep copy. | |
| 216 */ | |
| 178 | 217 Expression copy() |
| 0 | 218 { |
| 178 | 219 return cloneThis(this); |
| 0 | 220 } |
| 221 | |
| 222 Expression syntaxCopy() | |
| 223 { | |
| 224 //printf("Expression::syntaxCopy()\n"); | |
| 225 //dump(0); | |
| 226 return copy(); | |
| 227 } | |
| 228 | |
| 229 Expression semantic(Scope sc) | |
| 230 { | |
| 231 version (LOGSEMANTIC) { | |
| 232 printf("Expression.semantic() %s\n", toChars()); | |
| 233 } | |
| 234 if (type) | |
| 235 type = type.semantic(loc, sc); | |
| 236 else | |
| 237 type = Type.tvoid; | |
| 238 return this; | |
| 239 } | |
| 240 | |
| 241 Expression trySemantic(Scope sc) | |
| 242 { | |
| 243 uint errors = global.errors; | |
| 244 global.gag++; | |
| 245 Expression e = semantic(sc); | |
| 246 global.gag--; | |
| 247 if (errors != global.errors) | |
| 248 { | |
| 249 global.errors = errors; | |
| 250 e = null; | |
| 251 } | |
| 252 return e; | |
| 253 } | |
| 254 | |
| 255 DYNCAST dyncast() { return DYNCAST.DYNCAST_EXPRESSION; } // kludge for template.isExpression() | |
| 256 | |
| 257 void print() | |
| 258 { | |
| 259 assert(false); | |
| 260 } | |
| 261 | |
| 262 string toChars() | |
| 263 { | |
| 264 scope OutBuffer buf = new OutBuffer(); | |
| 265 HdrGenState hgs; | |
| 266 | |
| 267 toCBuffer(buf, &hgs); | |
| 268 return buf.toChars(); | |
| 269 } | |
| 270 | |
| 95 | 271 void dump(int i) |
| 0 | 272 { |
| 95 | 273 indent(i); |
| 274 writef("%p %s type=%s\n", this, Token.toChars(op), type_print(type)); | |
| 0 | 275 } |
| 276 | |
| 277 void error(T...)(string format, T t) | |
| 278 { | |
| 279 .error(loc, format, t); | |
| 280 } | |
| 281 | |
| 282 void warning(T...)(string formar, T t) | |
| 283 { | |
| 284 .warning(loc, format, t); | |
| 285 } | |
| 286 | |
| 287 void rvalue() | |
| 288 { | |
| 289 if (type && type.toBasetype().ty == TY.Tvoid) | |
| 290 { | |
| 291 error("expression %s is void and has no value", toChars()); | |
| 292 static if (false) { | |
| 293 dump(0); | |
| 294 halt(); | |
| 295 } | |
| 296 type = Type.terror; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 static Expression combine(Expression e1, Expression e2) | |
| 301 { | |
| 302 if (e1) | |
| 303 { | |
| 304 if (e2) | |
| 305 { | |
| 306 e1 = new CommaExp(e1.loc, e1, e2); | |
| 307 e1.type = e2.type; | |
| 308 } | |
| 309 } | |
| 310 else | |
| 311 { | |
| 312 e1 = e2; | |
| 313 } | |
| 314 | |
| 315 return e1; | |
| 316 } | |
| 317 | |
| 318 static Expressions arraySyntaxCopy(Expressions exps) | |
| 319 { | |
| 320 Expressions a = null; | |
| 321 | |
| 322 if (exps) | |
| 323 { | |
| 324 a = new Expressions(); | |
| 325 a.setDim(exps.dim); | |
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326 for (size_t i = 0; i < a.dim; i++) |
| 0 | 327 { |
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328 auto e = exps[i]; |
| 0 | 329 |
| 179 | 330 if (e) |
| 331 e = e.syntaxCopy(); | |
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332 a[i] = e; |
| 0 | 333 } |
| 334 } | |
| 335 return a; | |
| 336 } | |
| 337 | |
| 338 ulong toInteger() | |
| 339 { | |
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340 //printf("Expression %s\n", Token.toChars(op)); |
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341 error("Integer constant expression expected instead of %s", toChars()); |
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342 return 0; |
| 0 | 343 } |
| 344 | |
| 345 ulong toUInteger() | |
| 346 { | |
| 347 //printf("Expression %s\n", Token.toChars(op)); | |
| 348 return cast(ulong)toInteger(); | |
| 349 } | |
| 350 | |
| 351 real toReal() | |
| 352 { | |
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353 error("Floating point constant expression expected instead of %s", toChars()); |
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354 return 0; |
| 0 | 355 } |
| 356 | |
| 357 real toImaginary() | |
| 358 { | |
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359 error("Floating point constant expression expected instead of %s", toChars()); |
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360 return 0; |
| 0 | 361 } |
| 362 | |
| 363 Complex!(real) toComplex() | |
| 364 { | |
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365 error("Floating point constant expression expected instead of %s", toChars()); |
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366 return Complex!real(0); |
| 0 | 367 } |
| 368 | |
| 369 void toCBuffer(OutBuffer buf, HdrGenState* hgs) | |
| 370 { | |
| 371 buf.writestring(Token.toChars(op)); | |
| 372 } | |
| 373 | |
| 374 void toMangleBuffer(OutBuffer buf) | |
| 375 { | |
| 55 | 376 error("expression %s is not a valid template value argument", toChars()); |
| 0 | 377 assert(false); |
| 55 | 378 version (DEBUG) { |
| 379 dump(0); | |
| 380 } | |
| 0 | 381 } |
| 382 | |
| 66 | 383 /*************************************** |
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384 * Return true if expression is an lvalue. |
| 66 | 385 */ |
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386 bool isLvalue() |
| 0 | 387 { |
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388 return false; |
| 0 | 389 } |
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390 |
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391 /******************************* |
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392 * Give error if we're not an lvalue. |
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393 * If we can, convert expression to be an lvalue. |
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394 */ |
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395 Expression toLvalue(Scope sc, Expression e) |
| 0 | 396 { |
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397 if (!e) |
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398 e = this; |
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399 else if (!loc.filename) |
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400 loc = e.loc; |
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401 error("%s is not an lvalue", e.toChars()); |
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402 return this; |
| 0 | 403 } |
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404 |
| 0 | 405 Expression modifiableLvalue(Scope sc, Expression e) |
| 406 { | |
| 407 //printf("Expression::modifiableLvalue() %s, type = %s\n", toChars(), type.toChars()); | |
| 408 | |
| 409 // See if this expression is a modifiable lvalue (i.e. not const) | |
| 410 version (DMDV2) { | |
| 411 if (type && (!type.isMutable() || !type.isAssignable())) | |
| 412 error("%s is not mutable", e.toChars()); | |
| 413 } | |
| 414 return toLvalue(sc, e); | |
| 415 } | |
| 416 | |
| 417 /************************************** | |
| 418 * Do an implicit cast. | |
| 419 * Issue error if it can't be done. | |
| 420 */ | |
| 421 Expression implicitCastTo(Scope sc, Type t) | |
| 422 { | |
| 423 //printf("Expression.implicitCastTo(%s of type %s) => %s\n", toChars(), type.toChars(), t.toChars()); | |
| 424 | |
| 425 MATCH match = implicitConvTo(t); | |
| 426 if (match) | |
| 427 { | |
| 428 TY tyfrom = type.toBasetype().ty; | |
| 429 TY tyto = t.toBasetype().ty; | |
| 430 | |
| 431 version (DMDV1) { | |
| 432 if (global.params.warnings && | |
| 433 Type.impcnvWarn[tyfrom][tyto] && | |
| 434 op != TOKint64) | |
| 435 { | |
| 436 Expression e = optimize(WANT.WANTflags | WANT.WANTvalue); | |
| 437 | |
| 438 if (e.op == TOK.TOKint64) | |
| 439 return e.implicitCastTo(sc, t); | |
| 440 if (tyfrom == Tint32 && (op == TOKadd || op == TOKmin || op == TOKand || op == TOKor || op == TOKxor)) | |
| 441 { | |
| 442 /* This is really only a semi-kludge fix, | |
| 443 * we really should look at the operands of op | |
| 444 * and see if they are narrower types. | |
| 445 * For example, b=b|b and b=b|7 and s=b+b should be allowed, | |
| 446 * but b=b|i should be an error. | |
| 447 */ | |
| 448 ; | |
| 449 } | |
| 450 else | |
| 451 { | |
| 452 warning("implicit conversion of expression (%s) of type %s to %s can cause loss of data", toChars(), type.toChars(), t.toChars()); | |
| 453 } | |
| 454 } | |
| 455 } | |
| 456 version (DMDV2) { | |
| 457 if (match == MATCH.MATCHconst && t == type.constOf()) | |
| 458 { | |
| 459 Expression e = copy(); | |
| 460 e.type = t; | |
| 461 return e; | |
| 462 } | |
| 463 } | |
| 464 return castTo(sc, t); | |
| 465 } | |
| 466 | |
| 467 Expression e = optimize(WANT.WANTflags | WANT.WANTvalue); | |
| 468 if (e != this) | |
| 469 return e.implicitCastTo(sc, t); | |
| 470 | |
| 471 static if (false) { | |
| 472 printf("ty = %d\n", type.ty); | |
| 473 print(); | |
| 474 type.print(); | |
| 475 printf("to:\n"); | |
| 476 t.print(); | |
| 477 printf("%p %p type: %s to: %s\n", type.deco, t.deco, type.deco, t.deco); | |
| 478 //printf("%p %p %p\n", type.nextOf().arrayOf(), type, t); | |
| 479 fflush(stdout); | |
| 480 } | |
| 481 if (!t.deco) { | |
| 482 /* Can happen with: | |
| 483 * enum E { One } | |
| 484 * class A | |
| 485 * { static void fork(EDG dg) { dg(E.One); } | |
| 486 * alias void delegate(E) EDG; | |
| 487 * } | |
| 488 * Should eventually make it work. | |
| 489 */ | |
| 490 error("forward reference to type %s", t.toChars()); | |
| 491 } else if (t.reliesOnTident()) { | |
| 492 error("forward reference to type %s", t.reliesOnTident().toChars()); | |
| 493 } | |
| 494 | |
| 495 error("cannot implicitly convert expression (%s) of type %s to %s", toChars(), type.toChars(), t.toChars()); | |
| 496 return castTo(sc, t); | |
| 497 } | |
| 498 | |
| 499 /******************************************* | |
| 500 * Return !=0 if we can implicitly convert this to type t. | |
| 501 * Don't do the actual cast. | |
| 502 */ | |
| 503 MATCH implicitConvTo(Type t) | |
| 504 { | |
| 505 static if (false) { | |
| 506 printf("Expression.implicitConvTo(this=%s, type=%s, t=%s)\n", | |
| 507 toChars(), type.toChars(), t.toChars()); | |
| 508 } | |
| 509 //static int nest; if (++nest == 10) halt(); | |
| 510 if (!type) | |
| 511 { | |
| 512 error("%s is not an expression", toChars()); | |
| 513 type = Type.terror; | |
| 514 } | |
| 515 Expression e = optimize(WANT.WANTvalue | WANT.WANTflags); | |
| 516 if (e.type == t) | |
| 517 return MATCH.MATCHexact; | |
| 518 if (e != this) | |
| 519 { | |
| 520 //printf("\toptimized to %s of type %s\n", e.toChars(), e.type.toChars()); | |
| 521 return e.implicitConvTo(t); | |
| 522 } | |
| 523 MATCH match = type.implicitConvTo(t); | |
| 524 if (match != MATCH.MATCHnomatch) | |
| 525 return match; | |
| 526 | |
| 527 /* See if we can do integral narrowing conversions | |
| 528 */ | |
| 529 if (type.isintegral() && t.isintegral() && | |
| 530 type.isTypeBasic() && t.isTypeBasic()) | |
| 531 { | |
| 532 IntRange ir = getIntRange(); | |
| 533 if (ir.imax <= t.sizemask()) | |
| 534 return MATCH.MATCHconvert; | |
| 535 } | |
| 536 | |
| 537 static if (false) { | |
| 538 Type tb = t.toBasetype(); | |
| 539 if (tb.ty == Tdelegate) | |
| 540 { | |
| 541 TypeDelegate td = cast(TypeDelegate)tb; | |
| 542 TypeFunction tf = cast(TypeFunction)td.nextOf(); | |
| 543 | |
| 544 if (!tf.varargs && !(tf.arguments && tf.arguments.dim)) | |
| 545 { | |
| 546 match = type.implicitConvTo(tf.nextOf()); | |
| 547 if (match) | |
| 548 return match; | |
| 549 if (tf.nextOf().toBasetype().ty == Tvoid) | |
| 550 return MATCH.MATCHconvert; | |
| 551 } | |
| 552 } | |
| 553 } | |
| 554 return MATCH.MATCHnomatch; | |
| 555 } | |
| 556 | |
| 557 IntRange getIntRange() | |
| 558 { | |
| 53 | 559 IntRange ir; |
| 560 ir.imin = 0; | |
| 73 | 561 if (type.isintegral()) |
| 562 ir.imax = type.sizemask(); | |
| 563 else | |
| 564 ir.imax = 0xFFFFFFFFFFFFFFFFUL; // assume the worst | |
| 565 | |
| 53 | 566 return ir; |
| 0 | 567 } |
| 568 | |
| 569 /************************************** | |
| 570 * Do an explicit cast. | |
| 571 */ | |
| 572 Expression castTo(Scope sc, Type t) | |
| 573 { | |
| 574 //printf("Expression.castTo(this=%s, t=%s)\n", toChars(), t.toChars()); | |
| 575 static if (false) { | |
| 576 writef("Expression.castTo(this=%s, type=%s, t=%s)\n", | |
| 577 toChars(), type.toChars(), t.toChars()); | |
| 578 } | |
| 579 if (type is t) | |
| 580 return this; | |
| 581 Expression e = this; | |
| 582 Type tb = t.toBasetype(); | |
| 583 Type typeb = type.toBasetype(); | |
| 584 if (tb != typeb) | |
| 585 { | |
| 586 // Do (type *) cast of (type [dim]) | |
| 587 if (tb.ty == TY.Tpointer && typeb.ty == TY.Tsarray | |
| 588 ) | |
| 589 { | |
| 590 //printf("Converting [dim] to *\n"); | |
| 591 | |
| 592 if (typeb.size(loc) == 0) | |
| 593 e = new NullExp(loc); | |
| 594 else | |
| 595 e = new AddrExp(loc, e); | |
| 596 } | |
| 597 else { | |
| 598 static if (false) { | |
| 599 if (tb.ty == Tdelegate && type.ty != Tdelegate) | |
| 600 { | |
| 601 TypeDelegate td = cast(TypeDelegate)tb; | |
| 602 TypeFunction tf = cast(TypeFunction)td.nextOf(); | |
| 603 return toDelegate(sc, tf.nextOf()); | |
| 604 } | |
| 605 } | |
| 606 if (typeb.ty == TY.Tstruct) | |
| 607 { | |
| 608 TypeStruct ts = cast(TypeStruct)typeb; | |
| 609 if (!(tb.ty == TY.Tstruct && ts.sym == (cast(TypeStruct)tb).sym) && | |
| 610 ts.sym.aliasthis) | |
| 611 { /* Forward the cast to our alias this member, rewrite to: | |
| 612 * cast(to)e1.aliasthis | |
| 613 */ | |
| 614 Expression e1 = new DotIdExp(loc, this, ts.sym.aliasthis.ident); | |
| 615 Expression e2 = new CastExp(loc, e1, tb); | |
| 616 e2 = e2.semantic(sc); | |
| 617 return e2; | |
| 618 } | |
| 619 } | |
| 620 else if (typeb.ty == TY.Tclass) | |
| 621 { | |
| 622 TypeClass ts = cast(TypeClass)typeb; | |
| 623 if (tb.ty != TY.Tclass && ts.sym.aliasthis) | |
| 624 { /* Forward the cast to our alias this member, rewrite to: | |
| 625 * cast(to)e1.aliasthis | |
| 626 */ | |
| 627 Expression e1 = new DotIdExp(loc, this, ts.sym.aliasthis.ident); | |
| 628 Expression e2 = new CastExp(loc, e1, tb); | |
| 629 e2 = e2.semantic(sc); | |
| 630 return e2; | |
| 631 } | |
| 632 } | |
| 633 e = new CastExp(loc, e, tb); | |
| 634 } | |
| 635 } | |
| 636 else | |
| 637 { | |
| 638 e = e.copy(); // because of COW for assignment to e.type | |
| 639 } | |
| 640 | |
| 641 assert(e != this); | |
| 642 e.type = t; | |
| 643 //printf("Returning: %s\n", e.toChars()); | |
| 644 return e; | |
| 645 } | |
| 646 | |
| 647 /************************************ | |
| 648 * Detect cases where pointers to the stack can 'escape' the | |
| 649 * lifetime of the stack frame. | |
| 650 */ | |
| 651 void checkEscape() | |
| 652 { | |
| 653 } | |
| 654 | |
| 135 | 655 void checkEscapeRef() |
| 656 { | |
| 657 } | |
| 658 | |
| 0 | 659 void checkScalar() |
| 660 { | |
| 661 if (!type.isscalar()) | |
| 662 error("'%s' is not a scalar, it is a %s", toChars(), type.toChars()); | |
| 663 | |
| 664 rvalue(); | |
| 665 } | |
| 666 | |
| 667 void checkNoBool() | |
| 668 { | |
| 669 if (type.toBasetype().ty == TY.Tbool) | |
| 670 error("operation not allowed on bool '%s'", toChars()); | |
| 671 } | |
| 672 | |
| 673 Expression checkIntegral() | |
| 674 { | |
| 675 if (!type.isintegral()) | |
| 676 { | |
| 677 error("'%s' is not of integral type, it is a %s", toChars(), type.toChars()); | |
| 678 return new ErrorExp(); | |
| 679 } | |
| 680 | |
| 681 rvalue(); | |
| 682 return this; | |
| 683 } | |
| 684 | |
| 685 Expression checkArithmetic() | |
| 686 { | |
| 687 if (!type.isintegral() && !type.isfloating()) | |
| 688 { | |
| 689 error("'%s' is not of arithmetic type, it is a %s", toChars(), type.toChars()); | |
| 690 return new ErrorExp(); | |
| 691 } | |
| 692 | |
| 693 rvalue(); | |
| 694 return this; | |
| 695 } | |
| 696 | |
| 697 void checkDeprecated(Scope sc, Dsymbol s) | |
| 698 { | |
| 699 s.checkDeprecated(loc, sc); | |
| 700 } | |
| 701 | |
| 702 void checkPurity(Scope sc, FuncDeclaration f) | |
| 703 { | |
| 704 static if (true) { | |
| 705 if (sc.func) | |
| 706 { | |
|
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707 /* Given: |
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708 * void f() |
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709 * { pure void g() |
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710 * { |
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711 * void h() |
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712 * { |
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713 * void i() { } |
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714 * } |
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715 * } |
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716 * } |
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717 * g() can call h() but not f() |
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718 * i() can call h() and g() but not f() |
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719 */ |
| 0 | 720 FuncDeclaration outerfunc = sc.func; |
| 721 while (outerfunc.toParent2() && outerfunc.toParent2().isFuncDeclaration()) | |
| 722 { | |
| 723 outerfunc = outerfunc.toParent2().isFuncDeclaration(); | |
| 724 } | |
|
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725 if (outerfunc.isPure() && !sc.intypeof && (!f.isNested() && !f.isPure())) |
| 0 | 726 error("pure function '%s' cannot call impure function '%s'\n", |
| 727 sc.func.toChars(), f.toChars()); | |
| 728 } | |
| 729 } else { | |
| 730 if (sc.func && sc.func.isPure() && !sc.intypeof && !f.isPure()) | |
| 731 error("pure function '%s' cannot call impure function '%s'\n", | |
| 732 sc.func.toChars(), .toChars()); | |
| 733 } | |
| 734 } | |
|
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735 |
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736 void checkSafety(Scope sc, FuncDeclaration f) |
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737 { |
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738 if (sc.func && sc.func.isSafe() && !sc.intypeof && |
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739 !f.isSafe() && !f.isTrusted()) |
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740 error("safe function '%s' cannot call system function '%s'\n", |
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741 sc.func.toChars(), f.toChars()); |
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742 } |
| 0 | 743 |
| 744 /***************************** | |
| 745 * Check that expression can be tested for true or false. | |
| 746 */ | |
| 747 Expression checkToBoolean() | |
| 748 { | |
| 749 // Default is 'yes' - do nothing | |
| 750 | |
| 751 debug { | |
| 752 if (!type) | |
| 753 dump(0); | |
| 754 } | |
| 755 | |
| 756 if (!type.checkBoolean()) | |
| 757 { | |
| 758 error("expression %s of type %s does not have a boolean value", toChars(), type.toChars()); | |
| 759 } | |
| 760 | |
| 761 return this; | |
| 762 } | |
| 763 | |
| 764 Expression checkToPointer() | |
| 765 { | |
| 109 | 766 //writef("Expression::checkToPointer()\n"); |
| 767 Expression e = this; | |
| 0 | 768 |
| 109 | 769 version(SARRAYVALUE) {} else |
| 770 { | |
| 0 | 771 // If C static array, convert to pointer |
| 109 | 772 Type tb = type.toBasetype(); |
| 0 | 773 if (tb.ty == Tsarray) |
| 774 { | |
| 775 TypeSArray ts = cast(TypeSArray)tb; | |
| 776 if (ts.size(loc) == 0) | |
| 777 e = new NullExp(loc); | |
| 778 else | |
| 779 e = new AddrExp(loc, this); | |
| 780 e.type = ts.next.pointerTo(); | |
| 781 } | |
| 109 | 782 } |
| 0 | 783 return e; |
| 784 } | |
| 785 | |
| 786 Expression addressOf(Scope sc) | |
| 787 { | |
| 788 //printf("Expression::addressOf()\n"); | |
| 789 Expression e = toLvalue(sc, null); | |
| 790 e = new AddrExp(loc, e); | |
| 791 e.type = type.pointerTo(); | |
| 792 return e; | |
| 793 } | |
| 794 | |
| 795 /****************************** | |
| 796 * If this is a reference, dereference it. | |
| 797 */ | |
| 798 Expression deref() | |
| 799 { | |
| 800 //printf("Expression::deref()\n"); | |
| 73 | 801 // type could be null if forward referencing an 'auto' variable |
| 802 if (type && type.ty == Treference) | |
| 803 { | |
| 0 | 804 Expression e = new PtrExp(loc, this); |
| 805 e.type = (cast(TypeReference)type).next; | |
| 806 return e; | |
| 807 } | |
| 808 return this; | |
| 809 } | |
| 810 | |
| 811 /*********************************** | |
| 812 * Do integral promotions (convertchk). | |
| 813 * Don't convert <array of> to <pointer to> | |
| 814 */ | |
| 815 Expression integralPromotions(Scope sc) | |
| 816 { | |
| 817 Expression e = this; | |
| 818 | |
| 819 //printf("integralPromotions %s %s\n", e.toChars(), e.type.toChars()); | |
| 820 switch (type.toBasetype().ty) | |
| 821 { | |
| 822 case TY.Tvoid: | |
| 823 error("void has no value"); | |
| 824 break; | |
| 825 | |
| 826 case TY.Tint8: | |
| 827 case TY.Tuns8: | |
| 828 case TY.Tint16: | |
| 829 case TY.Tuns16: | |
| 830 case TY.Tbit: | |
| 831 case TY.Tbool: | |
| 832 case TY.Tchar: | |
| 833 case TY.Twchar: | |
| 834 e = e.castTo(sc, Type.tint32); | |
| 835 break; | |
| 836 | |
| 837 case TY.Tdchar: | |
| 838 e = e.castTo(sc, Type.tuns32); | |
| 839 break; | |
| 840 default: | |
| 841 break; /// | |
| 842 } | |
| 843 return e; | |
| 844 } | |
| 845 | |
| 55 | 846 /******************************************** |
| 847 * Convert from expression to delegate that returns the expression, | |
| 848 * i.e. convert: | |
| 849 * expr | |
| 850 * to: | |
| 851 * t delegate() { return expr; } | |
| 852 */ | |
| 0 | 853 Expression toDelegate(Scope sc, Type t) |
| 854 { | |
| 55 | 855 //printf("Expression.toDelegate(t = %s) %s\n", t.toChars(), toChars()); |
| 856 TypeFunction tf = new TypeFunction(null, t, 0, LINKd); | |
| 857 FuncLiteralDeclaration fld = new FuncLiteralDeclaration(loc, loc, tf, TOKdelegate, null); | |
| 858 Expression e; | |
| 859 static if (true) { | |
| 860 sc = sc.push(); | |
| 861 sc.parent = fld; // set current function to be the delegate | |
| 862 e = this; | |
| 863 e.scanForNestedRef(sc); | |
| 864 sc = sc.pop(); | |
| 865 } else { | |
| 866 e = this.syntaxCopy(); | |
| 867 } | |
| 868 Statement s = new ReturnStatement(loc, e); | |
| 869 fld.fbody = s; | |
| 870 e = new FuncExp(loc, fld); | |
| 871 e = e.semantic(sc); | |
| 872 return e; | |
| 0 | 873 } |
| 874 | |
| 875 void scanForNestedRef(Scope sc) | |
| 876 { | |
| 55 | 877 //printf("Expression.scanForNestedRef(%s)\n", toChars()); |
| 0 | 878 } |
| 879 | |
| 880 Expression optimize(int result) | |
| 881 { | |
| 882 //printf("Expression.optimize(result = x%x) %s\n", result, toChars()); | |
| 883 return this; | |
| 884 } | |
| 885 | |
|
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886 Expression interpret(InterState istate) |
| 0 | 887 { |
|
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888 version(LOG) |
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889 { |
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890 writef("Expression::interpret() %s\n", toChars()); |
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891 writef("type = %s\n", type.toChars()); |
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892 dump(0); |
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893 } |
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894 error("Cannot interpret %s at compile time", toChars()); |
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895 return EXP_CANT_INTERPRET; |
| 0 | 896 } |
| 897 | |
| 898 int isConst() | |
| 899 { | |
| 900 //printf("Expression::isConst(): %s\n", toChars()); | |
| 901 return 0; | |
| 902 } | |
| 903 | |
| 904 /******************************** | |
| 905 * Does this expression statically evaluate to a boolean TRUE or FALSE? | |
| 906 */ | |
| 907 bool isBool(bool result) | |
| 908 { | |
| 909 return false; | |
| 910 } | |
| 911 | |
| 141 | 912 /******************************** |
| 913 * Does this expression result in either a 1 or a 0? | |
| 914 */ | |
|
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915 bool isBit() |
| 0 | 916 { |
| 141 | 917 return false; |
| 0 | 918 } |
| 919 | |
| 920 /******************************** | |
| 921 * Check for expressions that have no use. | |
| 922 * Input: | |
| 923 * flag 0 not going to use the result, so issue error message if no | |
| 924 * side effects | |
| 925 * 1 the result of the expression is used, but still check | |
| 926 * for useless subexpressions | |
| 927 * 2 do not issue error messages, just return !=0 if expression | |
| 928 * has side effects | |
| 929 */ | |
| 930 bool checkSideEffect(int flag) | |
| 931 { | |
| 932 if (flag == 0) | |
| 933 { | |
| 73 | 934 if (op == TOKerror) |
| 935 { | |
| 936 // Error should have already been printed | |
| 937 } | |
| 938 else if (op == TOKimport) | |
| 0 | 939 error("%s has no effect", toChars()); |
| 940 else | |
| 941 error("%s has no effect in expression (%s)", | |
| 942 | |
| 943 Token.toChars(op), toChars()); | |
| 944 } | |
| 945 | |
| 946 return false; | |
| 947 } | |
| 948 | |
| 949 bool canThrow() | |
| 950 { | |
| 951 version (DMDV2) { | |
| 952 return false; | |
| 953 } else { | |
| 954 return true; | |
| 955 } | |
| 956 } | |
| 957 | |
|
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958 /**************************************** |
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959 * Resolve __LINE__ and __FILE__ to loc. |
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960 */ |
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961 Expression resolveLoc(Loc loc, Scope sc) |
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962 { |
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963 return this; |
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964 } |
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965 |
| 0 | 966 int inlineCost(InlineCostState* ics) |
| 967 { | |
| 968 return 1; | |
| 969 } | |
| 970 | |
| 971 Expression doInline(InlineDoState ids) | |
| 972 { | |
| 973 //printf("Expression.doInline(%s): %s\n", Token.toChars(op), toChars()); | |
| 974 return copy(); | |
| 975 } | |
| 976 | |
| 977 Expression inlineScan(InlineScanState* iss) | |
| 978 { | |
| 979 return this; | |
| 980 } | |
| 981 | |
| 982 /*********************************** | |
| 983 * Determine if operands of binary op can be reversed | |
| 984 * to fit operator overload. | |
| 985 */ | |
| 986 | |
| 987 // For operator overloading | |
| 988 bool isCommutative() | |
| 989 { | |
| 990 return false; // default is no reverse | |
| 991 } | |
| 992 | |
| 993 /*********************************** | |
| 994 * Get Identifier for operator overload. | |
| 995 */ | |
| 996 Identifier opId() | |
| 997 { | |
| 998 assert(false); | |
| 999 } | |
| 1000 | |
| 1001 /*********************************** | |
| 1002 * Get Identifier for reverse operator overload, | |
| 1003 * null if not supported for this operator. | |
| 1004 */ | |
| 1005 Identifier opId_r() | |
| 1006 { | |
| 1007 return null; | |
| 1008 } | |
| 1009 | |
| 1010 // For array ops | |
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1011 /****************************************** |
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1012 * Construct the identifier for the array operation function, |
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1013 * and build the argument list to pass to it. |
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1014 */ |
| 0 | 1015 void buildArrayIdent(OutBuffer buf, Expressions arguments) |
| 1016 { | |
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1017 buf.writestring("Exp"); |
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1018 arguments.shift(this); |
| 0 | 1019 } |
| 1020 | |
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1021 Expression buildArrayLoop(Parameters fparams) |
| 0 | 1022 { |
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1023 Identifier id = Identifier.generateId("c", fparams.dim); |
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1024 auto param = new Parameter(STC.STCundefined, type, id, null); |
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ClassDeclarations, Arguments -> Vector
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1025 fparams.shift(param); |
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1026 Expression e = new IdentifierExp(Loc(0), id); |
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1027 return e; |
| 0 | 1028 } |
| 95 | 1029 |
| 1030 /*********************************************** | |
| 1031 * Test if operand is a valid array op operand. | |
| 1032 */ | |
| 1033 int isArrayOperand() | |
| 1034 { | |
| 1035 //writef("Expression::isArrayOperand() %s\n", toChars()); | |
| 1036 if (op == TOKslice) | |
| 1037 return 1; | |
| 1038 if (type.toBasetype().ty == TY.Tarray) | |
| 1039 { | |
| 1040 switch (op) | |
| 1041 { | |
| 1042 case TOKadd: | |
| 1043 case TOKmin: | |
| 1044 case TOKmul: | |
| 1045 case TOKdiv: | |
| 1046 case TOKmod: | |
| 1047 case TOKxor: | |
| 1048 case TOKand: | |
| 1049 case TOKor: | |
| 1050 case TOKneg: | |
| 1051 case TOKtilde: | |
| 1052 return 1; | |
| 1053 | |
| 1054 default: | |
| 1055 break; | |
| 1056 } | |
| 1057 } | |
| 1058 return 0; | |
| 1059 } | |
| 1060 | |
| 0 | 1061 // Back end |
| 1062 elem* toElem(IRState* irs) | |
| 1063 { | |
| 141 | 1064 print(); |
| 0 | 1065 assert(false); |
| 141 | 1066 return null; |
| 0 | 1067 } |
| 1068 | |
| 1069 dt_t** toDt(dt_t** pdt) | |
| 1070 { | |
| 141 | 1071 debug |
| 1072 { | |
| 1073 writef("Expression::toDt() %d\n", op); | |
| 1074 dump(0); | |
| 1075 } | |
| 1076 error("non-constant expression %s", toChars()); | |
| 1077 pdt = dtnzeros(pdt, 1); | |
| 1078 return pdt; | |
| 0 | 1079 } |
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1080 } |
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1081 |
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Expressions -> Vector!Expression
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1082 alias Vector!Expression Expressions; |