Mercurial > projects > ddmd
annotate dmd/AddrExp.d @ 109:ceda59b4d255
expression.c changes, now only ddoc should be left
| author | Trass3r |
|---|---|
| date | Tue, 31 Aug 2010 22:08:52 +0200 |
| parents | be2ab491772e |
| children | e28b18c23469 |
| rev | line source |
|---|---|
| 72 | 1 module dmd.AddrExp; |
| 2 | |
| 3 import dmd.Expression; | |
| 4 import dmd.UnaExp; | |
| 5 import dmd.MATCH; | |
| 6 import dmd.Type; | |
| 7 import dmd.Loc; | |
| 8 import dmd.Scope; | |
| 0 | 9 import dmd.IRState; |
| 10 import dmd.ErrorExp; | |
| 11 import dmd.DotVarExp; | |
| 12 import dmd.FuncDeclaration; | |
| 13 import dmd.DelegateExp; | |
| 14 import dmd.VarExp; | |
| 15 import dmd.VarDeclaration; | |
| 72 | 16 import dmd.ThisExp; |
| 0 | 17 import dmd.TOK; |
| 18 import dmd.WANT; | |
| 19 import dmd.CommaExp; | |
| 20 import dmd.STC; | |
| 21 import dmd.PtrExp; | |
| 22 import dmd.SymOffExp; | |
| 23 import dmd.IndexExp; | |
| 24 import dmd.OverExp; | |
| 25 import dmd.Dsymbol; | |
| 26 import dmd.ScopeDsymbol; | |
| 27 import dmd.TY; | |
| 72 | 28 import dmd.TypeSArray; |
| 29 | |
| 0 | 30 import dmd.backend.elem; |
| 31 import dmd.backend.Util; | |
| 72 | 32 import dmd.codegen.Util; |
| 33 | |
| 0 | 34 class AddrExp : UnaExp |
| 35 { | |
| 36 this(Loc loc, Expression e) | |
| 37 { | |
| 38 super(loc, TOK.TOKaddress, AddrExp.sizeof, e); | |
| 39 } | |
| 40 | |
| 72 | 41 override Expression semantic(Scope sc) |
| 0 | 42 { |
| 43 version (LOGSEMANTIC) { | |
| 44 printf("AddrExp.semantic('%s')\n", toChars()); | |
| 45 } | |
| 46 if (!type) | |
| 47 { | |
| 48 UnaExp.semantic(sc); | |
| 49 e1 = e1.toLvalue(sc, null); | |
| 50 if (!e1.type) | |
| 51 { | |
| 52 error("cannot take address of %s", e1.toChars()); | |
| 53 return new ErrorExp(); | |
| 54 } | |
| 55 if (!e1.type.deco) | |
| 56 { | |
| 57 /* No deco means semantic() was not run on the type. | |
| 58 * We have to run semantic() on the symbol to get the right type: | |
| 59 * auto x = &bar; | |
| 60 * pure: int bar() { return 1;} | |
| 61 * otherwise the 'pure' is missing from the type assigned to x. | |
| 62 */ | |
| 63 | |
| 64 error("forward reference to %s", e1.toChars()); | |
| 65 return new ErrorExp(); | |
| 66 } | |
| 67 | |
| 68 type = e1.type.pointerTo(); | |
| 69 | |
| 70 // See if this should really be a delegate | |
| 71 if (e1.op == TOKdotvar) | |
| 72 { | |
| 73 DotVarExp dve = cast(DotVarExp)e1; | |
| 74 FuncDeclaration f = dve.var.isFuncDeclaration(); | |
| 75 | |
| 76 if (f) | |
| 77 { | |
| 78 if (!dve.hasOverloads) | |
| 79 f.tookAddressOf++; | |
| 80 Expression e = new DelegateExp(loc, dve.e1, f, dve.hasOverloads); | |
| 81 e = e.semantic(sc); | |
| 82 return e; | |
| 83 } | |
| 84 } | |
| 85 else if (e1.op == TOKvar) | |
| 86 { | |
| 87 VarExp ve = cast(VarExp)e1; | |
| 88 | |
| 89 VarDeclaration v = ve.var.isVarDeclaration(); | |
| 90 if (v && !v.canTakeAddressOf()) | |
| 91 error("cannot take address of %s", e1.toChars()); | |
| 92 | |
| 93 FuncDeclaration f = ve.var.isFuncDeclaration(); | |
| 94 | |
| 95 if (f) | |
| 96 { | |
| 97 if (!ve.hasOverloads || | |
| 98 /* Because nested functions cannot be overloaded, | |
| 99 * mark here that we took its address because castTo() | |
| 100 * may not be called with an exact match. | |
| 101 */ | |
| 102 f.toParent2().isFuncDeclaration()) | |
| 103 f.tookAddressOf++; | |
| 104 | |
| 105 if (f.isNested()) | |
| 106 { | |
| 107 Expression e = new DelegateExp(loc, e1, f, ve.hasOverloads); | |
| 108 e = e.semantic(sc); | |
| 109 return e; | |
| 110 } | |
| 111 if (f.needThis() && hasThis(sc)) | |
| 112 { | |
| 113 /* Should probably supply 'this' after overload resolution, | |
| 114 * not before. | |
| 115 */ | |
| 116 Expression ethis = new ThisExp(loc); | |
| 117 Expression e = new DelegateExp(loc, ethis, f, ve.hasOverloads); | |
| 118 e = e.semantic(sc); | |
| 119 return e; | |
| 120 } | |
| 121 } | |
| 122 } | |
| 123 return optimize(WANTvalue); | |
| 124 } | |
| 125 return this; | |
| 126 } | |
| 127 | |
| 72 | 128 override elem* toElem(IRState* irs) |
| 0 | 129 { |
| 130 elem* e; | |
| 131 | |
| 132 //printf("AddrExp.toElem('%s')\n", toChars()); | |
| 133 | |
| 134 e = e1.toElem(irs); | |
| 135 e = addressElem(e, e1.type); | |
| 136 L2: | |
| 137 e.Ety = type.totym(); | |
| 138 el_setLoc(e,loc); | |
| 139 return e; | |
| 140 } | |
| 141 | |
| 72 | 142 override MATCH implicitConvTo(Type t) |
| 0 | 143 { |
| 144 static if (false) { | |
| 145 printf("AddrExp.implicitConvTo(this=%s, type=%s, t=%s)\n", | |
| 146 toChars(), type.toChars(), t.toChars()); | |
| 147 } | |
| 148 MATCH result; | |
| 149 | |
| 150 result = type.implicitConvTo(t); | |
| 151 //printf("\tresult = %d\n", result); | |
| 152 | |
| 153 if (result == MATCHnomatch) | |
| 154 { | |
| 155 // Look for pointers to functions where the functions are overloaded. | |
| 156 | |
| 157 t = t.toBasetype(); | |
| 158 | |
| 159 if (e1.op == TOKoverloadset && | |
| 160 (t.ty == Tpointer || t.ty == Tdelegate) && t.nextOf().ty == Tfunction) | |
| 161 { | |
| 162 OverExp eo = cast(OverExp)e1; | |
| 163 FuncDeclaration f = null; | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
77
diff
changeset
|
164 foreach (s; eo.vars.a) |
| 0 | 165 { |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
77
diff
changeset
|
166 auto f2 = s.isFuncDeclaration(); |
| 0 | 167 assert(f2); |
| 168 if (f2.overloadExactMatch(t.nextOf())) | |
| 169 { | |
| 170 if (f) | |
| 171 /* Error if match in more than one overload set, | |
| 172 * even if one is a 'better' match than the other. | |
| 173 */ | |
| 174 ScopeDsymbol.multiplyDefined(loc, f, f2); | |
| 175 else | |
| 176 f = f2; | |
| 177 result = MATCHexact; | |
| 178 } | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 if (type.ty == Tpointer && type.nextOf().ty == Tfunction && | |
| 183 t.ty == Tpointer && t.nextOf().ty == Tfunction && | |
| 184 e1.op == TOKvar) | |
| 185 { | |
| 186 /* I don't think this can ever happen - | |
| 187 * it should have been | |
| 188 * converted to a SymOffExp. | |
| 189 */ | |
| 190 assert(0); | |
| 191 VarExp ve = cast(VarExp)e1; | |
| 192 FuncDeclaration f = ve.var.isFuncDeclaration(); | |
| 193 if (f && f.overloadExactMatch(t.nextOf())) | |
| 194 result = MATCHexact; | |
| 195 } | |
| 196 } | |
| 197 | |
| 198 //printf("\tresult = %d\n", result); | |
| 199 return result; | |
| 200 } | |
| 201 | |
| 72 | 202 override Expression castTo(Scope sc, Type t) |
| 0 | 203 { |
| 204 Type tb; | |
| 205 | |
| 206 static if (false) { | |
| 207 printf("AddrExp.castTo(this=%s, type=%s, t=%s)\n", toChars(), type.toChars(), t.toChars()); | |
| 208 } | |
| 209 Expression e = this; | |
| 210 | |
| 211 tb = t.toBasetype(); | |
| 212 type = type.toBasetype(); | |
| 213 if (tb != type) | |
| 214 { | |
| 215 // Look for pointers to functions where the functions are overloaded. | |
| 216 | |
| 217 if (e1.op == TOKoverloadset && | |
| 218 (t.ty == Tpointer || t.ty == Tdelegate) && t.nextOf().ty == Tfunction) | |
| 219 { | |
| 220 OverExp eo = cast(OverExp)e1; | |
| 221 FuncDeclaration f = null; | |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
77
diff
changeset
|
222 foreach (s; eo.vars.a) |
| 0 | 223 { |
|
84
be2ab491772e
Expressions -> Vector!Expression
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
77
diff
changeset
|
224 auto f2 = s.isFuncDeclaration(); |
| 0 | 225 assert(f2); |
| 226 if (f2.overloadExactMatch(t.nextOf())) | |
| 227 { | |
| 228 if (f) | |
| 229 /* Error if match in more than one overload set, | |
| 230 * even if one is a 'better' match than the other. | |
| 231 */ | |
| 232 ScopeDsymbol.multiplyDefined(loc, f, f2); | |
| 233 else | |
| 234 f = f2; | |
| 235 } | |
| 236 } | |
| 237 if (f) | |
| 238 { | |
| 239 f.tookAddressOf++; | |
| 240 SymOffExp se = new SymOffExp(loc, f, 0, 0); | |
| 241 se.semantic(sc); | |
| 242 // Let SymOffExp.castTo() do the heavy lifting | |
| 243 return se.castTo(sc, t); | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 | |
| 248 if (type.ty == Tpointer && type.nextOf().ty == Tfunction && | |
| 249 tb.ty == Tpointer && tb.nextOf().ty == Tfunction && | |
| 250 e1.op == TOKvar) | |
| 251 { | |
| 252 VarExp ve = cast(VarExp)e1; | |
| 253 FuncDeclaration f = ve.var.isFuncDeclaration(); | |
| 254 if (f) | |
| 255 { | |
| 256 assert(0); // should be SymOffExp instead | |
| 257 f = f.overloadExactMatch(tb.nextOf()); | |
| 258 if (f) | |
| 259 { | |
| 260 e = new VarExp(loc, f); | |
| 261 e.type = f.type; | |
| 262 e = new AddrExp(loc, e); | |
| 263 e.type = t; | |
| 264 return e; | |
| 265 } | |
| 266 } | |
| 267 } | |
| 268 e = Expression.castTo(sc, t); | |
| 269 } | |
| 270 e.type = t; | |
| 271 return e; | |
| 272 } | |
| 273 | |
| 72 | 274 override Expression optimize(int result) |
| 0 | 275 { |
| 276 Expression e; | |
| 277 | |
| 278 //printf("AddrExp.optimize(result = %d) %s\n", result, toChars()); | |
| 279 | |
| 280 /* Rewrite &(a,b) as (a,&b) | |
| 281 */ | |
| 282 if (e1.op == TOKcomma) | |
| 283 { | |
| 284 CommaExp ce = cast(CommaExp)e1; | |
| 285 AddrExp ae = new AddrExp(loc, ce.e2); | |
| 286 ae.type = type; | |
| 287 e = new CommaExp(ce.loc, ce.e1, ae); | |
| 288 e.type = type; | |
| 289 return e.optimize(result); | |
| 290 } | |
| 291 | |
| 292 if (e1.op == TOKvar) | |
| 293 { | |
| 294 VarExp ve = cast(VarExp)e1; | |
| 295 if (ve.var.storage_class & STCmanifest) | |
| 296 e1 = e1.optimize(result); | |
| 297 } | |
| 298 else | |
| 299 e1 = e1.optimize(result); | |
| 300 | |
| 301 // Convert &*ex to ex | |
| 302 if (e1.op == TOKstar) | |
| 303 { | |
| 304 Expression ex; | |
| 305 | |
| 306 ex = (cast(PtrExp)e1).e1; | |
| 307 if (type.equals(ex.type)) | |
| 308 e = ex; | |
| 309 else | |
| 310 { | |
| 311 e = ex.copy(); | |
| 312 e.type = type; | |
| 313 } | |
| 314 return e; | |
| 315 } | |
| 316 if (e1.op == TOKvar) | |
| 317 { | |
| 318 VarExp ve = cast(VarExp)e1; | |
| 319 if (!ve.var.isOut() && !ve.var.isRef() && | |
| 320 !ve.var.isImportedSymbol()) | |
| 321 { | |
| 322 SymOffExp se = new SymOffExp(loc, ve.var, 0, ve.hasOverloads); | |
| 323 se.type = type; | |
| 324 return se; | |
| 325 } | |
| 326 } | |
| 327 if (e1.op == TOKindex) | |
| 328 { | |
| 329 // Convert &array[n] to &array+n | |
| 330 IndexExp ae = cast(IndexExp)e1; | |
| 331 | |
| 332 if (ae.e2.op == TOKint64 && ae.e1.op == TOKvar) | |
| 333 { | |
| 334 long index = ae.e2.toInteger(); | |
| 335 VarExp ve = cast(VarExp)ae.e1; | |
| 336 if (ve.type.ty == Tsarray | |
| 337 && !ve.var.isImportedSymbol()) | |
| 338 { | |
| 339 TypeSArray ts = cast(TypeSArray)ve.type; | |
| 340 long dim = ts.dim.toInteger(); | |
| 341 if (index < 0 || index >= dim) | |
| 342 error("array index %jd is out of bounds [0..%jd]", index, dim); | |
| 343 e = new SymOffExp(loc, ve.var, cast(uint)(index * ts.nextOf().size())); | |
| 344 e.type = type; | |
| 345 return e; | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 return this; | |
| 350 } | |
| 351 } | |
| 352 |