Mercurial > projects > ddmd
annotate dmd/Expression.d @ 93:df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
and some additional ones I came across
| author | Trass3r |
|---|---|
| date | Mon, 30 Aug 2010 22:50:30 +0200 |
| parents | be2ab491772e |
| children | ae5b11064a9a |
| rev | line source |
|---|---|
| 0 | 1 module dmd.Expression; |
| 2 | |
| 3 import dmd.Loc; | |
| 4 import dmd.TOK; | |
|
12
832f71e6f96c
*Exp and *AssignExp arrayOp implementation added (might be a bit incomplete)
korDen
parents:
4
diff
changeset
|
5 import dmd.Argument; |
|
832f71e6f96c
*Exp and *AssignExp arrayOp implementation added (might be a bit incomplete)
korDen
parents:
4
diff
changeset
|
6 import dmd.IdentifierExp; |
| 0 | 7 import dmd.Type; |
| 8 import dmd.WANT; | |
| 9 import dmd.Scope; | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
73
diff
changeset
|
10 import dmd.Array; |
| 0 | 11 import dmd.ArrayTypes; |
| 12 import dmd.OutBuffer; | |
| 13 import dmd.HdrGenState; | |
| 14 import dmd.MATCH; | |
| 15 import dmd.IntRange; | |
| 16 import dmd.Dsymbol; | |
| 17 import dmd.FuncDeclaration; | |
| 18 import dmd.InterState; | |
| 19 import dmd.InlineCostState; | |
| 20 import dmd.InlineDoState; | |
| 21 import dmd.InlineScanState; | |
| 22 import dmd.Identifier; | |
| 23 import dmd.IRState; | |
| 24 import dmd.DotIdExp; | |
| 25 import dmd.TypeExp; | |
| 26 import dmd.DYNCAST; | |
| 27 import dmd.TY; | |
| 28 import dmd.CallExp; | |
| 29 import dmd.VarExp; | |
| 30 import dmd.STC; | |
| 31 import dmd.TemplateInstance; | |
| 32 import dmd.CommaExp; | |
| 33 import dmd.NullExp; | |
| 34 import dmd.AddrExp; | |
| 55 | 35 import dmd.LINK; |
| 36 import dmd.FuncExp; | |
| 37 import dmd.ReturnStatement; | |
| 38 import dmd.Statement; | |
| 39 import dmd.FuncLiteralDeclaration; | |
| 40 import dmd.TypeFunction; | |
| 0 | 41 import dmd.ErrorExp; |
| 42 import dmd.TypeStruct; | |
| 43 import dmd.CastExp; | |
| 44 import dmd.Global; | |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
45 import dmd.GlobalExpressions; |
| 0 | 46 import dmd.Token; |
| 47 import dmd.TypeClass; | |
| 48 import dmd.PtrExp; | |
| 49 import dmd.TypeSArray; | |
| 50 import dmd.TypeReference; | |
| 51 import dmd.Util; | |
| 52 import dmd.Complex; | |
| 53 | |
| 54 import dmd.backend.elem; | |
| 55 import dmd.backend.dt_t; | |
| 56 | |
| 4 | 57 import core.memory; |
| 2 | 58 |
| 0 | 59 import std.stdio : writef; |
| 60 | |
| 61 import std.conv; | |
| 62 | |
| 63 /* Things like: | |
| 64 * int.size | |
| 65 * foo.size | |
| 66 * (foo).size | |
| 67 * cast(foo).size | |
| 68 */ | |
| 69 | |
| 70 Expression typeDotIdExp(Loc loc, Type type, Identifier ident) | |
| 71 { | |
| 72 return new DotIdExp(loc, new TypeExp(loc, type), ident); | |
| 73 } | |
| 74 | |
| 75 /***************************************** | |
| 76 * Determine if 'this' is available. | |
| 77 * If it is, return the FuncDeclaration that has it. | |
| 78 */ | |
| 79 | |
| 80 FuncDeclaration hasThis(Scope sc) | |
| 81 { | |
| 82 FuncDeclaration fd; | |
| 83 FuncDeclaration fdthis; | |
| 84 | |
| 85 //printf("hasThis()\n"); | |
| 86 fdthis = sc.parent.isFuncDeclaration(); | |
| 87 //printf("fdthis = %p, '%s'\n", fdthis, fdthis ? fdthis.toChars() : ""); | |
| 88 | |
| 89 // Go upwards until we find the enclosing member function | |
| 90 fd = fdthis; | |
| 91 while (1) | |
| 92 { | |
| 93 if (!fd) | |
| 94 { | |
| 95 goto Lno; | |
| 96 } | |
| 97 if (!fd.isNested()) | |
| 98 break; | |
| 99 | |
| 100 Dsymbol parent = fd.parent; | |
| 101 while (parent) | |
| 102 { | |
| 103 TemplateInstance ti = parent.isTemplateInstance(); | |
| 104 if (ti) | |
| 105 parent = ti.parent; | |
| 106 else | |
| 107 break; | |
| 108 } | |
| 109 | |
| 110 fd = fd.parent.isFuncDeclaration(); | |
| 111 } | |
| 112 | |
| 113 if (!fd.isThis()) | |
| 114 { | |
| 115 //printf("test '%s'\n", fd.toChars()); | |
| 116 goto Lno; | |
| 117 } | |
| 118 | |
| 119 assert(fd.vthis); | |
| 120 return fd; | |
| 121 | |
| 122 Lno: | |
| 123 return null; // don't have 'this' available | |
| 124 } | |
| 125 | |
| 126 /*************************************** | |
| 127 * Pull out any properties. | |
| 128 */ | |
| 129 | |
| 130 Expression resolveProperties(Scope sc, Expression e) | |
| 131 { | |
| 132 //printf("resolveProperties(%s)\n", e.toChars()); | |
| 133 if (e.type) | |
| 134 { | |
| 135 Type t = e.type.toBasetype(); | |
| 136 | |
| 137 if (t.ty == TY.Tfunction || e.op == TOK.TOKoverloadset) | |
| 138 { | |
| 139 e = new CallExp(e.loc, e); | |
| 140 e = e.semantic(sc); | |
| 141 } | |
| 142 | |
| 143 /* Look for e being a lazy parameter; rewrite as delegate call | |
| 144 */ | |
| 145 else if (e.op == TOK.TOKvar) | |
| 146 { VarExp ve = cast(VarExp)e; | |
| 147 | |
| 148 if (ve.var.storage_class & STC.STClazy) | |
| 149 { | |
| 150 e = new CallExp(e.loc, e); | |
| 151 e = e.semantic(sc); | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 else if (e.op == TOK.TOKdotexp) | |
| 156 { | |
| 157 e.error("expression has no value"); | |
| 158 } | |
| 159 } | |
| 160 else if (e.op == TOK.TOKdottd) | |
| 161 { | |
| 162 e = new CallExp(e.loc, e); | |
| 163 e = e.semantic(sc); | |
| 164 } | |
| 165 | |
| 166 return e; | |
| 167 } | |
| 168 | |
| 169 class Expression | |
| 170 { | |
| 171 Loc loc; // file location | |
| 172 TOK op; // handy to minimize use of dynamic_cast | |
| 173 Type type; // !=null means that semantic() has been run | |
| 174 int size; // # of bytes in Expression so we can copy() it | |
| 175 | |
| 176 this(Loc loc, TOK op, int size) | |
| 177 { | |
| 178 this.loc = loc; | |
| 179 //writef("Expression.Expression(op = %d %s) this = %p\n", op, to!(string)(op), this); | |
| 180 this.op = op; | |
| 181 this.size = size; | |
| 182 type = null; | |
| 183 } | |
| 184 | |
| 45 | 185 bool equals(Object o) |
| 0 | 186 { |
| 187 return this is o; | |
| 188 } | |
| 189 | |
| 190 /********************************* | |
| 191 * Does *not* do a deep copy. | |
| 192 */ | |
| 193 Expression copy() /// bad bad bad | |
| 194 { | |
| 195 Expression e; | |
| 196 if (!size) | |
| 197 { | |
| 198 debug { | |
| 199 writef("No expression copy for: %s\n", toChars()); | |
| 200 writef("op = %d\n", op); | |
| 201 dump(0); | |
| 202 } | |
| 203 assert(0); | |
| 204 } | |
| 205 auto size = this.classinfo.init.length; | |
| 2 | 206 auto ptr = GC.malloc(size); |
| 0 | 207 memcpy(ptr, cast(void*)this, size); |
| 208 | |
| 209 return cast(Expression)ptr; | |
| 210 } | |
| 211 | |
| 212 Expression syntaxCopy() | |
| 213 { | |
| 214 //printf("Expression::syntaxCopy()\n"); | |
| 215 //dump(0); | |
| 216 return copy(); | |
| 217 } | |
| 218 | |
| 219 Expression semantic(Scope sc) | |
| 220 { | |
| 221 version (LOGSEMANTIC) { | |
| 222 printf("Expression.semantic() %s\n", toChars()); | |
| 223 } | |
| 224 if (type) | |
| 225 type = type.semantic(loc, sc); | |
| 226 else | |
| 227 type = Type.tvoid; | |
| 228 return this; | |
| 229 } | |
| 230 | |
| 231 Expression trySemantic(Scope sc) | |
| 232 { | |
| 233 uint errors = global.errors; | |
| 234 global.gag++; | |
| 235 Expression e = semantic(sc); | |
| 236 global.gag--; | |
| 237 if (errors != global.errors) | |
| 238 { | |
| 239 global.errors = errors; | |
| 240 e = null; | |
| 241 } | |
| 242 return e; | |
| 243 } | |
| 244 | |
| 245 DYNCAST dyncast() { return DYNCAST.DYNCAST_EXPRESSION; } // kludge for template.isExpression() | |
| 246 | |
| 247 void print() | |
| 248 { | |
| 249 assert(false); | |
| 250 } | |
| 251 | |
| 252 string toChars() | |
| 253 { | |
| 254 scope OutBuffer buf = new OutBuffer(); | |
| 255 HdrGenState hgs; | |
| 256 | |
| 257 toCBuffer(buf, &hgs); | |
| 258 return buf.toChars(); | |
| 259 } | |
| 260 | |
| 261 void dump(int indent) | |
| 262 { | |
| 263 assert(false); | |
| 264 } | |
| 265 | |
| 266 void error(T...)(string format, T t) | |
| 267 { | |
| 268 .error(loc, format, t); | |
| 269 } | |
| 270 | |
| 271 void warning(T...)(string formar, T t) | |
| 272 { | |
| 273 .warning(loc, format, t); | |
| 274 } | |
| 275 | |
| 276 void rvalue() | |
| 277 { | |
| 278 if (type && type.toBasetype().ty == TY.Tvoid) | |
| 279 { | |
| 280 error("expression %s is void and has no value", toChars()); | |
| 281 static if (false) { | |
| 282 dump(0); | |
| 283 halt(); | |
| 284 } | |
| 285 type = Type.terror; | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 static Expression combine(Expression e1, Expression e2) | |
| 290 { | |
| 291 if (e1) | |
| 292 { | |
| 293 if (e2) | |
| 294 { | |
| 295 e1 = new CommaExp(e1.loc, e1, e2); | |
| 296 e1.type = e2.type; | |
| 297 } | |
| 298 } | |
| 299 else | |
| 300 { | |
| 301 e1 = e2; | |
| 302 } | |
| 303 | |
| 304 return e1; | |
| 305 } | |
| 306 | |
| 307 static Expressions arraySyntaxCopy(Expressions exps) | |
| 308 { | |
| 309 Expressions a = null; | |
| 310 | |
| 311 if (exps) | |
| 312 { | |
| 313 a = new Expressions(); | |
| 314 a.setDim(exps.dim); | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
73
diff
changeset
|
315 for (size_t i = 0; i < a.dim; i++) |
| 0 | 316 { |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
73
diff
changeset
|
317 auto e = exps[i]; |
| 0 | 318 |
| 319 e = e.syntaxCopy(); | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
73
diff
changeset
|
320 a[i] = e; |
| 0 | 321 } |
| 322 } | |
| 323 return a; | |
| 324 } | |
| 325 | |
| 326 ulong toInteger() | |
| 327 { | |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
328 //printf("Expression %s\n", Token.toChars(op)); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
329 error("Integer constant expression expected instead of %s", toChars()); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
330 return 0; |
| 0 | 331 } |
| 332 | |
| 333 ulong toUInteger() | |
| 334 { | |
| 335 //printf("Expression %s\n", Token.toChars(op)); | |
| 336 return cast(ulong)toInteger(); | |
| 337 } | |
| 338 | |
| 339 real toReal() | |
| 340 { | |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
341 error("Floating point constant expression expected instead of %s", toChars()); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
342 return 0; |
| 0 | 343 } |
| 344 | |
| 345 real toImaginary() | |
| 346 { | |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
347 error("Floating point constant expression expected instead of %s", toChars()); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
348 return 0; |
| 0 | 349 } |
| 350 | |
| 351 Complex!(real) toComplex() | |
| 352 { | |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
353 error("Floating point constant expression expected instead of %s", toChars()); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
354 return Complex!real(0); |
| 0 | 355 } |
| 356 | |
| 357 void toCBuffer(OutBuffer buf, HdrGenState* hgs) | |
| 358 { | |
| 359 buf.writestring(Token.toChars(op)); | |
| 360 } | |
| 361 | |
| 362 void toMangleBuffer(OutBuffer buf) | |
| 363 { | |
| 55 | 364 error("expression %s is not a valid template value argument", toChars()); |
| 0 | 365 assert(false); |
| 55 | 366 version (DEBUG) { |
| 367 dump(0); | |
| 368 } | |
| 0 | 369 } |
| 370 | |
| 66 | 371 /*************************************** |
| 372 * Return !=0 if expression is an lvalue. | |
| 373 */ | |
| 0 | 374 int isLvalue() |
| 375 { | |
| 66 | 376 return 0; |
| 0 | 377 } |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
378 |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
379 /******************************* |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
380 * Give error if we're not an lvalue. |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
381 * If we can, convert expression to be an lvalue. |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
382 */ |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
383 Expression toLvalue(Scope sc, Expression e) |
| 0 | 384 { |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
385 if (!e) |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
386 e = this; |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
387 else if (!loc.filename) |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
388 loc = e.loc; |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
389 error("%s is not an lvalue", e.toChars()); |
|
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
390 return this; |
| 0 | 391 } |
|
93
df6d0f967680
implemented a whole bunch of methods to make phobos 2.035 compile
Trass3r
parents:
84
diff
changeset
|
392 |
| 0 | 393 Expression modifiableLvalue(Scope sc, Expression e) |
| 394 { | |
| 395 //printf("Expression::modifiableLvalue() %s, type = %s\n", toChars(), type.toChars()); | |
| 396 | |
| 397 // See if this expression is a modifiable lvalue (i.e. not const) | |
| 398 version (DMDV2) { | |
| 399 if (type && (!type.isMutable() || !type.isAssignable())) | |
| 400 error("%s is not mutable", e.toChars()); | |
| 401 } | |
| 402 return toLvalue(sc, e); | |
| 403 } | |
| 404 | |
| 405 /************************************** | |
| 406 * Do an implicit cast. | |
| 407 * Issue error if it can't be done. | |
| 408 */ | |
| 409 Expression implicitCastTo(Scope sc, Type t) | |
| 410 { | |
| 411 //printf("Expression.implicitCastTo(%s of type %s) => %s\n", toChars(), type.toChars(), t.toChars()); | |
| 412 | |
| 413 MATCH match = implicitConvTo(t); | |
| 414 if (match) | |
| 415 { | |
| 416 TY tyfrom = type.toBasetype().ty; | |
| 417 TY tyto = t.toBasetype().ty; | |
| 418 | |
| 419 version (DMDV1) { | |
| 420 if (global.params.warnings && | |
| 421 Type.impcnvWarn[tyfrom][tyto] && | |
| 422 op != TOKint64) | |
| 423 { | |
| 424 Expression e = optimize(WANT.WANTflags | WANT.WANTvalue); | |
| 425 | |
| 426 if (e.op == TOK.TOKint64) | |
| 427 return e.implicitCastTo(sc, t); | |
| 428 if (tyfrom == Tint32 && (op == TOKadd || op == TOKmin || op == TOKand || op == TOKor || op == TOKxor)) | |
| 429 { | |
| 430 /* This is really only a semi-kludge fix, | |
| 431 * we really should look at the operands of op | |
| 432 * and see if they are narrower types. | |
| 433 * For example, b=b|b and b=b|7 and s=b+b should be allowed, | |
| 434 * but b=b|i should be an error. | |
| 435 */ | |
| 436 ; | |
| 437 } | |
| 438 else | |
| 439 { | |
| 440 warning("implicit conversion of expression (%s) of type %s to %s can cause loss of data", toChars(), type.toChars(), t.toChars()); | |
| 441 } | |
| 442 } | |
| 443 } | |
| 444 version (DMDV2) { | |
| 445 if (match == MATCH.MATCHconst && t == type.constOf()) | |
| 446 { | |
| 447 Expression e = copy(); | |
| 448 e.type = t; | |
| 449 return e; | |
| 450 } | |
| 451 } | |
| 452 return castTo(sc, t); | |
| 453 } | |
| 454 | |
| 455 Expression e = optimize(WANT.WANTflags | WANT.WANTvalue); | |
| 456 if (e != this) | |
| 457 return e.implicitCastTo(sc, t); | |
| 458 | |
| 459 static if (false) { | |
| 460 printf("ty = %d\n", type.ty); | |
| 461 print(); | |
| 462 type.print(); | |
| 463 printf("to:\n"); | |
| 464 t.print(); | |
| 465 printf("%p %p type: %s to: %s\n", type.deco, t.deco, type.deco, t.deco); | |
| 466 //printf("%p %p %p\n", type.nextOf().arrayOf(), type, t); | |
| 467 fflush(stdout); | |
| 468 } | |
| 469 if (!t.deco) { | |
| 470 /* Can happen with: | |
| 471 * enum E { One } | |
| 472 * class A | |
| 473 * { static void fork(EDG dg) { dg(E.One); } | |
| 474 * alias void delegate(E) EDG; | |
| 475 * } | |
| 476 * Should eventually make it work. | |
| 477 */ | |
| 478 error("forward reference to type %s", t.toChars()); | |
| 479 } else if (t.reliesOnTident()) { | |
| 480 error("forward reference to type %s", t.reliesOnTident().toChars()); | |
| 481 } | |
| 482 | |
| 483 error("cannot implicitly convert expression (%s) of type %s to %s", toChars(), type.toChars(), t.toChars()); | |
| 484 return castTo(sc, t); | |
| 485 } | |
| 486 | |
| 487 /******************************************* | |
| 488 * Return !=0 if we can implicitly convert this to type t. | |
| 489 * Don't do the actual cast. | |
| 490 */ | |
| 491 MATCH implicitConvTo(Type t) | |
| 492 { | |
| 493 static if (false) { | |
| 494 printf("Expression.implicitConvTo(this=%s, type=%s, t=%s)\n", | |
| 495 toChars(), type.toChars(), t.toChars()); | |
| 496 } | |
| 497 //static int nest; if (++nest == 10) halt(); | |
| 498 if (!type) | |
| 499 { | |
| 500 error("%s is not an expression", toChars()); | |
| 501 type = Type.terror; | |
| 502 } | |
| 503 Expression e = optimize(WANT.WANTvalue | WANT.WANTflags); | |
| 504 if (e.type == t) | |
| 505 return MATCH.MATCHexact; | |
| 506 if (e != this) | |
| 507 { | |
| 508 //printf("\toptimized to %s of type %s\n", e.toChars(), e.type.toChars()); | |
| 509 return e.implicitConvTo(t); | |
| 510 } | |
| 511 MATCH match = type.implicitConvTo(t); | |
| 512 if (match != MATCH.MATCHnomatch) | |
| 513 return match; | |
| 514 | |
| 515 /* See if we can do integral narrowing conversions | |
| 516 */ | |
| 517 if (type.isintegral() && t.isintegral() && | |
| 518 type.isTypeBasic() && t.isTypeBasic()) | |
| 519 { | |
| 520 IntRange ir = getIntRange(); | |
| 521 if (ir.imax <= t.sizemask()) | |
| 522 return MATCH.MATCHconvert; | |
| 523 } | |
| 524 | |
| 525 static if (false) { | |
| 526 Type tb = t.toBasetype(); | |
| 527 if (tb.ty == Tdelegate) | |
| 528 { | |
| 529 TypeDelegate td = cast(TypeDelegate)tb; | |
| 530 TypeFunction tf = cast(TypeFunction)td.nextOf(); | |
| 531 | |
| 532 if (!tf.varargs && !(tf.arguments && tf.arguments.dim)) | |
| 533 { | |
| 534 match = type.implicitConvTo(tf.nextOf()); | |
| 535 if (match) | |
| 536 return match; | |
| 537 if (tf.nextOf().toBasetype().ty == Tvoid) | |
| 538 return MATCH.MATCHconvert; | |
| 539 } | |
| 540 } | |
| 541 } | |
| 542 return MATCH.MATCHnomatch; | |
| 543 } | |
| 544 | |
| 545 IntRange getIntRange() | |
| 546 { | |
| 53 | 547 IntRange ir; |
| 548 ir.imin = 0; | |
| 73 | 549 if (type.isintegral()) |
| 550 ir.imax = type.sizemask(); | |
| 551 else | |
| 552 ir.imax = 0xFFFFFFFFFFFFFFFFUL; // assume the worst | |
| 553 | |
| 53 | 554 return ir; |
| 0 | 555 } |
| 556 | |
| 557 /************************************** | |
| 558 * Do an explicit cast. | |
| 559 */ | |
| 560 Expression castTo(Scope sc, Type t) | |
| 561 { | |
| 562 //printf("Expression.castTo(this=%s, t=%s)\n", toChars(), t.toChars()); | |
| 563 static if (false) { | |
| 564 writef("Expression.castTo(this=%s, type=%s, t=%s)\n", | |
| 565 toChars(), type.toChars(), t.toChars()); | |
| 566 } | |
| 567 if (type is t) | |
| 568 return this; | |
| 569 Expression e = this; | |
| 570 Type tb = t.toBasetype(); | |
| 571 Type typeb = type.toBasetype(); | |
| 572 if (tb != typeb) | |
| 573 { | |
| 574 // Do (type *) cast of (type [dim]) | |
| 575 if (tb.ty == TY.Tpointer && typeb.ty == TY.Tsarray | |
| 576 ) | |
| 577 { | |
| 578 //printf("Converting [dim] to *\n"); | |
| 579 | |
| 580 if (typeb.size(loc) == 0) | |
| 581 e = new NullExp(loc); | |
| 582 else | |
| 583 e = new AddrExp(loc, e); | |
| 584 } | |
| 585 else { | |
| 586 static if (false) { | |
| 587 if (tb.ty == Tdelegate && type.ty != Tdelegate) | |
| 588 { | |
| 589 TypeDelegate td = cast(TypeDelegate)tb; | |
| 590 TypeFunction tf = cast(TypeFunction)td.nextOf(); | |
| 591 return toDelegate(sc, tf.nextOf()); | |
| 592 } | |
| 593 } | |
| 594 if (typeb.ty == TY.Tstruct) | |
| 595 { | |
| 596 TypeStruct ts = cast(TypeStruct)typeb; | |
| 597 if (!(tb.ty == TY.Tstruct && ts.sym == (cast(TypeStruct)tb).sym) && | |
| 598 ts.sym.aliasthis) | |
| 599 { /* Forward the cast to our alias this member, rewrite to: | |
| 600 * cast(to)e1.aliasthis | |
| 601 */ | |
| 602 Expression e1 = new DotIdExp(loc, this, ts.sym.aliasthis.ident); | |
| 603 Expression e2 = new CastExp(loc, e1, tb); | |
| 604 e2 = e2.semantic(sc); | |
| 605 return e2; | |
| 606 } | |
| 607 } | |
| 608 else if (typeb.ty == TY.Tclass) | |
| 609 { | |
| 610 TypeClass ts = cast(TypeClass)typeb; | |
| 611 if (tb.ty != TY.Tclass && ts.sym.aliasthis) | |
| 612 { /* Forward the cast to our alias this member, rewrite to: | |
| 613 * cast(to)e1.aliasthis | |
| 614 */ | |
| 615 Expression e1 = new DotIdExp(loc, this, ts.sym.aliasthis.ident); | |
| 616 Expression e2 = new CastExp(loc, e1, tb); | |
| 617 e2 = e2.semantic(sc); | |
| 618 return e2; | |
| 619 } | |
| 620 } | |
| 621 e = new CastExp(loc, e, tb); | |
| 622 } | |
| 623 } | |
| 624 else | |
| 625 { | |
| 626 e = e.copy(); // because of COW for assignment to e.type | |
| 627 } | |
| 628 | |
| 629 assert(e != this); | |
| 630 e.type = t; | |
| 631 //printf("Returning: %s\n", e.toChars()); | |
| 632 return e; | |
| 633 } | |
| 634 | |
| 635 /************************************ | |
| 636 * Detect cases where pointers to the stack can 'escape' the | |
| 637 * lifetime of the stack frame. | |
| 638 */ | |
| 639 void checkEscape() | |
| 640 { | |
| 641 } | |
| 642 | |
| 643 void checkScalar() | |
| 644 { | |
| 645 if (!type.isscalar()) | |
| 646 error("'%s' is not a scalar, it is a %s", toChars(), type.toChars()); | |
| 647 | |
| 648 rvalue(); | |
| 649 } | |
| 650 | |
| 651 void checkNoBool() | |
| 652 { | |
| 653 if (type.toBasetype().ty == TY.Tbool) | |
| 654 error("operation not allowed on bool '%s'", toChars()); | |
| 655 } | |
| 656 | |
| 657 Expression checkIntegral() | |
| 658 { | |
| 659 if (!type.isintegral()) | |
| 660 { | |
| 661 error("'%s' is not of integral type, it is a %s", toChars(), type.toChars()); | |
| 662 return new ErrorExp(); | |
| 663 } | |
| 664 | |
| 665 rvalue(); | |
| 666 return this; | |
| 667 } | |
| 668 | |
| 669 Expression checkArithmetic() | |
| 670 { | |
| 671 if (!type.isintegral() && !type.isfloating()) | |
| 672 { | |
| 673 error("'%s' is not of arithmetic type, it is a %s", toChars(), type.toChars()); | |
| 674 return new ErrorExp(); | |
| 675 } | |
| 676 | |
| 677 rvalue(); | |
| 678 return this; | |
| 679 } | |
| 680 | |
| 681 void checkDeprecated(Scope sc, Dsymbol s) | |
| 682 { | |
| 683 s.checkDeprecated(loc, sc); | |
| 684 } | |
| 685 | |
| 686 void checkPurity(Scope sc, FuncDeclaration f) | |
| 687 { | |
| 688 static if (true) { | |
| 689 if (sc.func) | |
| 690 { | |
| 691 FuncDeclaration outerfunc = sc.func; | |
| 692 while (outerfunc.toParent2() && outerfunc.toParent2().isFuncDeclaration()) | |
| 693 { | |
| 694 outerfunc = outerfunc.toParent2().isFuncDeclaration(); | |
| 695 } | |
| 696 if (outerfunc.isPure() && !sc.intypeof && (!f.isNested() && !f.isPure())) | |
| 697 error("pure function '%s' cannot call impure function '%s'\n", | |
| 698 sc.func.toChars(), f.toChars()); | |
| 699 } | |
| 700 } else { | |
| 701 if (sc.func && sc.func.isPure() && !sc.intypeof && !f.isPure()) | |
| 702 error("pure function '%s' cannot call impure function '%s'\n", | |
| 703 sc.func.toChars(), .toChars()); | |
| 704 } | |
| 705 } | |
| 706 | |
| 707 /***************************** | |
| 708 * Check that expression can be tested for true or false. | |
| 709 */ | |
| 710 Expression checkToBoolean() | |
| 711 { | |
| 712 // Default is 'yes' - do nothing | |
| 713 | |
| 714 debug { | |
| 715 if (!type) | |
| 716 dump(0); | |
| 717 } | |
| 718 | |
| 719 if (!type.checkBoolean()) | |
| 720 { | |
| 721 error("expression %s of type %s does not have a boolean value", toChars(), type.toChars()); | |
| 722 } | |
| 723 | |
| 724 return this; | |
| 725 } | |
| 726 | |
| 727 Expression checkToPointer() | |
| 728 { | |
| 729 Expression e; | |
| 730 Type tb; | |
| 731 | |
| 732 //printf("Expression::checkToPointer()\n"); | |
| 733 e = this; | |
| 734 | |
| 735 // If C static array, convert to pointer | |
| 736 tb = type.toBasetype(); | |
| 737 if (tb.ty == Tsarray) | |
| 738 { | |
| 739 TypeSArray ts = cast(TypeSArray)tb; | |
| 740 if (ts.size(loc) == 0) | |
| 741 e = new NullExp(loc); | |
| 742 else | |
| 743 e = new AddrExp(loc, this); | |
| 744 e.type = ts.next.pointerTo(); | |
| 745 } | |
| 746 return e; | |
| 747 } | |
| 748 | |
| 749 Expression addressOf(Scope sc) | |
| 750 { | |
| 751 //printf("Expression::addressOf()\n"); | |
| 752 Expression e = toLvalue(sc, null); | |
| 753 e = new AddrExp(loc, e); | |
| 754 e.type = type.pointerTo(); | |
| 755 return e; | |
| 756 } | |
| 757 | |
| 758 /****************************** | |
| 759 * If this is a reference, dereference it. | |
| 760 */ | |
| 761 Expression deref() | |
| 762 { | |
| 763 //printf("Expression::deref()\n"); | |
| 73 | 764 // type could be null if forward referencing an 'auto' variable |
| 765 if (type && type.ty == Treference) | |
| 766 { | |
| 0 | 767 Expression e = new PtrExp(loc, this); |
| 768 e.type = (cast(TypeReference)type).next; | |
| 769 return e; | |
| 770 } | |
| 771 return this; | |
| 772 } | |
| 773 | |
| 774 /*********************************** | |
| 775 * Do integral promotions (convertchk). | |
| 776 * Don't convert <array of> to <pointer to> | |
| 777 */ | |
| 778 Expression integralPromotions(Scope sc) | |
| 779 { | |
| 780 Expression e = this; | |
| 781 | |
| 782 //printf("integralPromotions %s %s\n", e.toChars(), e.type.toChars()); | |
| 783 switch (type.toBasetype().ty) | |
| 784 { | |
| 785 case TY.Tvoid: | |
| 786 error("void has no value"); | |
| 787 break; | |
| 788 | |
| 789 case TY.Tint8: | |
| 790 case TY.Tuns8: | |
| 791 case TY.Tint16: | |
| 792 case TY.Tuns16: | |
| 793 case TY.Tbit: | |
| 794 case TY.Tbool: | |
| 795 case TY.Tchar: | |
| 796 case TY.Twchar: | |
| 797 e = e.castTo(sc, Type.tint32); | |
| 798 break; | |
| 799 | |
| 800 case TY.Tdchar: | |
| 801 e = e.castTo(sc, Type.tuns32); | |
| 802 break; | |
| 803 default: | |
| 804 break; /// | |
| 805 } | |
| 806 return e; | |
| 807 } | |
| 808 | |
| 55 | 809 /******************************************** |
| 810 * Convert from expression to delegate that returns the expression, | |
| 811 * i.e. convert: | |
| 812 * expr | |
| 813 * to: | |
| 814 * t delegate() { return expr; } | |
| 815 */ | |
| 0 | 816 Expression toDelegate(Scope sc, Type t) |
| 817 { | |
| 55 | 818 //printf("Expression.toDelegate(t = %s) %s\n", t.toChars(), toChars()); |
| 819 TypeFunction tf = new TypeFunction(null, t, 0, LINKd); | |
| 820 FuncLiteralDeclaration fld = new FuncLiteralDeclaration(loc, loc, tf, TOKdelegate, null); | |
| 821 Expression e; | |
| 822 static if (true) { | |
| 823 sc = sc.push(); | |
| 824 sc.parent = fld; // set current function to be the delegate | |
| 825 e = this; | |
| 826 e.scanForNestedRef(sc); | |
| 827 sc = sc.pop(); | |
| 828 } else { | |
| 829 e = this.syntaxCopy(); | |
| 830 } | |
| 831 Statement s = new ReturnStatement(loc, e); | |
| 832 fld.fbody = s; | |
| 833 e = new FuncExp(loc, fld); | |
| 834 e = e.semantic(sc); | |
| 835 return e; | |
| 0 | 836 } |
| 837 | |
| 838 void scanForNestedRef(Scope sc) | |
| 839 { | |
| 55 | 840 //printf("Expression.scanForNestedRef(%s)\n", toChars()); |
| 0 | 841 } |
| 842 | |
| 843 Expression optimize(int result) | |
| 844 { | |
| 845 //printf("Expression.optimize(result = x%x) %s\n", result, toChars()); | |
| 846 return this; | |
| 847 } | |
| 848 | |
|
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849 Expression interpret(InterState istate) |
| 0 | 850 { |
|
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851 version(LOG) |
|
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|
852 { |
|
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diff
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|
853 writef("Expression::interpret() %s\n", toChars()); |
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diff
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|
854 writef("type = %s\n", type.toChars()); |
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855 dump(0); |
|
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856 } |
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857 error("Cannot interpret %s at compile time", toChars()); |
|
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|
858 return EXP_CANT_INTERPRET; |
| 0 | 859 } |
| 860 | |
| 861 int isConst() | |
| 862 { | |
| 863 //printf("Expression::isConst(): %s\n", toChars()); | |
| 864 return 0; | |
| 865 } | |
| 866 | |
| 867 /******************************** | |
| 868 * Does this expression statically evaluate to a boolean TRUE or FALSE? | |
| 869 */ | |
| 870 bool isBool(bool result) | |
| 871 { | |
| 872 return false; | |
| 873 } | |
| 874 | |
| 875 int isBit() | |
| 876 { | |
| 877 assert(false); | |
| 878 } | |
| 879 | |
| 880 /******************************** | |
| 881 * Check for expressions that have no use. | |
| 882 * Input: | |
| 883 * flag 0 not going to use the result, so issue error message if no | |
| 884 * side effects | |
| 885 * 1 the result of the expression is used, but still check | |
| 886 * for useless subexpressions | |
| 887 * 2 do not issue error messages, just return !=0 if expression | |
| 888 * has side effects | |
| 889 */ | |
| 890 bool checkSideEffect(int flag) | |
| 891 { | |
| 892 if (flag == 0) | |
| 893 { | |
| 73 | 894 if (op == TOKerror) |
| 895 { | |
| 896 // Error should have already been printed | |
| 897 } | |
| 898 else if (op == TOKimport) | |
| 0 | 899 error("%s has no effect", toChars()); |
| 900 else | |
| 901 error("%s has no effect in expression (%s)", | |
| 902 | |
| 903 Token.toChars(op), toChars()); | |
| 904 } | |
| 905 | |
| 906 return false; | |
| 907 } | |
| 908 | |
| 909 bool canThrow() | |
| 910 { | |
| 911 version (DMDV2) { | |
| 912 return false; | |
| 913 } else { | |
| 914 return true; | |
| 915 } | |
| 916 } | |
| 917 | |
| 918 int inlineCost(InlineCostState* ics) | |
| 919 { | |
| 920 return 1; | |
| 921 } | |
| 922 | |
| 923 Expression doInline(InlineDoState ids) | |
| 924 { | |
| 925 //printf("Expression.doInline(%s): %s\n", Token.toChars(op), toChars()); | |
| 926 return copy(); | |
| 927 } | |
| 928 | |
| 929 Expression inlineScan(InlineScanState* iss) | |
| 930 { | |
| 931 return this; | |
| 932 } | |
| 933 | |
| 934 /*********************************** | |
| 935 * Determine if operands of binary op can be reversed | |
| 936 * to fit operator overload. | |
| 937 */ | |
| 938 | |
| 939 // For operator overloading | |
| 940 bool isCommutative() | |
| 941 { | |
| 942 return false; // default is no reverse | |
| 943 } | |
| 944 | |
| 945 /*********************************** | |
| 946 * Get Identifier for operator overload. | |
| 947 */ | |
| 948 Identifier opId() | |
| 949 { | |
| 950 assert(false); | |
| 951 } | |
| 952 | |
| 953 /*********************************** | |
| 954 * Get Identifier for reverse operator overload, | |
| 955 * null if not supported for this operator. | |
| 956 */ | |
| 957 Identifier opId_r() | |
| 958 { | |
| 959 return null; | |
| 960 } | |
| 961 | |
| 962 // For array ops | |
|
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|
963 /****************************************** |
|
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diff
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|
964 * Construct the identifier for the array operation function, |
|
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|
965 * and build the argument list to pass to it. |
|
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|
966 */ |
| 0 | 967 void buildArrayIdent(OutBuffer buf, Expressions arguments) |
| 968 { | |
|
12
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korDen
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diff
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|
969 buf.writestring("Exp"); |
|
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Eldar Insafutdinov <e.insafutdinov@gmail.com>
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|
970 arguments.shift(this); |
| 0 | 971 } |
| 972 | |
| 973 Expression buildArrayLoop(Arguments fparams) | |
| 974 { | |
|
12
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korDen
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diff
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|
975 Identifier id = Identifier.generateId("c", fparams.dim); |
|
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korDen
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|
976 Argument param = new Argument(STC.STCundefined, type, id, null); |
|
832f71e6f96c
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|
977 fparams.shift(cast(void*)param); |
|
832f71e6f96c
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diff
changeset
|
978 Expression e = new IdentifierExp(Loc(0), id); |
|
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diff
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|
979 return e; |
| 0 | 980 } |
| 981 | |
| 982 // Back end | |
| 983 elem* toElem(IRState* irs) | |
| 984 { | |
| 985 assert(false); | |
| 986 } | |
| 987 | |
| 988 dt_t** toDt(dt_t** pdt) | |
| 989 { | |
| 990 assert(false); | |
| 991 } | |
|
16
5c9b78899f5d
Implemented methods for Tuples, fixed some linking issues.
Robert Clipsham <robert@octarineparrot.com>
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|
992 } |
|
84
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|
993 |
|
be2ab491772e
Expressions -> Vector!Expression
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parents:
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|
994 alias Vector!Expression Expressions; |