Mercurial > projects > ldc
annotate dmd/struct.c @ 73:b706170e24a9 trunk
[svn r77] Fixed foreach on slice.
Fixed some nested function problems when accessing outer function parameters.
Major changes to handling of structs.
Initial support for unions.
Probably more...
author | lindquist |
---|---|
date | Wed, 31 Oct 2007 03:11:32 +0100 |
parents | 28e99b04a132 |
children | 058d3925950e |
rev | line source |
---|---|
1 | 1 |
2 // Compiler implementation of the D programming language | |
3 // Copyright (c) 1999-2006 by Digital Mars | |
4 // All Rights Reserved | |
5 // written by Walter Bright | |
6 // http://www.digitalmars.com | |
7 // License for redistribution is by either the Artistic License | |
8 // in artistic.txt, or the GNU General Public License in gnu.txt. | |
9 // See the included readme.txt for details. | |
10 | |
11 #include <stdio.h> | |
12 #include <assert.h> | |
13 | |
14 #include "root.h" | |
15 #include "aggregate.h" | |
16 #include "scope.h" | |
17 #include "mtype.h" | |
18 #include "declaration.h" | |
19 #include "module.h" | |
20 #include "id.h" | |
21 #include "statement.h" | |
22 | |
23 /********************************* AggregateDeclaration ****************************/ | |
24 | |
25 AggregateDeclaration::AggregateDeclaration(Loc loc, Identifier *id) | |
26 : ScopeDsymbol(id) | |
27 { | |
28 this->loc = loc; | |
29 | |
30 storage_class = 0; | |
31 protection = PROTpublic; | |
32 type = NULL; | |
33 handle = NULL; | |
34 structsize = 0; // size of struct | |
35 alignsize = 0; // size of struct for alignment purposes | |
36 structalign = 0; // struct member alignment in effect | |
37 hasUnions = 0; | |
38 sizeok = 0; // size not determined yet | |
39 isdeprecated = 0; | |
40 inv = NULL; | |
41 aggNew = NULL; | |
42 aggDelete = NULL; | |
43 | |
44 stag = NULL; | |
45 sinit = NULL; | |
46 scope = NULL; | |
47 | |
48 llvmType = NULL; | |
49 llvmVtbl = NULL; | |
54
28e99b04a132
[svn r58] Fixed cond expression resulting in a non-basic type.
lindquist
parents:
1
diff
changeset
|
50 llvmConstVtbl = NULL; |
1 | 51 llvmInitZ = NULL; |
52 llvmInProgress = false; | |
73 | 53 llvmHasUnions = false; |
1 | 54 } |
55 | |
56 enum PROT AggregateDeclaration::prot() | |
57 { | |
58 return protection; | |
59 } | |
60 | |
61 void AggregateDeclaration::semantic2(Scope *sc) | |
62 { | |
63 //printf("AggregateDeclaration::semantic2(%s)\n", toChars()); | |
64 if (scope) | |
65 { error("has forward references"); | |
66 return; | |
67 } | |
68 if (members) | |
69 { | |
70 sc = sc->push(this); | |
71 for (size_t i = 0; i < members->dim; i++) | |
72 { | |
73 Dsymbol *s = (Dsymbol *)members->data[i]; | |
74 s->semantic2(sc); | |
75 } | |
76 sc->pop(); | |
77 } | |
78 } | |
79 | |
80 void AggregateDeclaration::semantic3(Scope *sc) | |
81 { int i; | |
82 | |
83 //printf("AggregateDeclaration::semantic3(%s)\n", toChars()); | |
84 if (members) | |
85 { | |
86 sc = sc->push(this); | |
87 for (i = 0; i < members->dim; i++) | |
88 { | |
89 Dsymbol *s = (Dsymbol *)members->data[i]; | |
90 s->semantic3(sc); | |
91 } | |
92 sc->pop(); | |
93 } | |
94 } | |
95 | |
96 void AggregateDeclaration::inlineScan() | |
97 { int i; | |
98 | |
99 //printf("AggregateDeclaration::inlineScan(%s)\n", toChars()); | |
100 if (members) | |
101 { | |
102 for (i = 0; i < members->dim; i++) | |
103 { | |
104 Dsymbol *s = (Dsymbol *)members->data[i]; | |
105 //printf("inline scan aggregate symbol '%s'\n", s->toChars()); | |
106 s->inlineScan(); | |
107 } | |
108 } | |
109 } | |
110 | |
111 unsigned AggregateDeclaration::size(Loc loc) | |
112 { | |
113 //printf("AggregateDeclaration::size() = %d\n", structsize); | |
114 if (!members) | |
115 error(loc, "unknown size"); | |
116 if (sizeok != 1) | |
117 { error(loc, "no size yet for forward reference"); | |
118 //*(char*)0=0; | |
119 } | |
120 return structsize; | |
121 } | |
122 | |
123 Type *AggregateDeclaration::getType() | |
124 { | |
125 return type; | |
126 } | |
127 | |
128 int AggregateDeclaration::isDeprecated() | |
129 { | |
130 return isdeprecated; | |
131 } | |
132 | |
133 /**************************** | |
134 * Do byte or word alignment as necessary. | |
135 * Align sizes of 0, as we may not know array sizes yet. | |
136 */ | |
137 | |
138 void AggregateDeclaration::alignmember(unsigned salign, unsigned size, unsigned *poffset) | |
139 { | |
140 //printf("salign = %d, size = %d, offset = %d\n",salign,size,offset); | |
141 if (salign > 1) | |
142 { int sa; | |
143 | |
144 switch (size) | |
145 { case 1: | |
146 break; | |
147 case 2: | |
148 case_2: | |
149 *poffset = (*poffset + 1) & ~1; // align to word | |
150 break; | |
151 case 3: | |
152 case 4: | |
153 if (salign == 2) | |
154 goto case_2; | |
155 *poffset = (*poffset + 3) & ~3; // align to dword | |
156 break; | |
157 default: | |
158 *poffset = (*poffset + salign - 1) & ~(salign - 1); | |
159 break; | |
160 } | |
161 } | |
162 //printf("result = %d\n",offset); | |
163 } | |
164 | |
165 | |
166 void AggregateDeclaration::addField(Scope *sc, VarDeclaration *v) | |
167 { | |
168 unsigned memsize; // size of member | |
169 unsigned memalignsize; // size of member for alignment purposes | |
170 unsigned xalign; // alignment boundaries | |
171 | |
172 //printf("AggregateDeclaration::addField('%s') %s\n", v->toChars(), toChars()); | |
173 | |
174 // Check for forward referenced types which will fail the size() call | |
175 Type *t = v->type->toBasetype(); | |
176 if (t->ty == Tstruct /*&& isStructDeclaration()*/) | |
177 { TypeStruct *ts = (TypeStruct *)t; | |
178 | |
179 if (ts->sym->sizeok != 1) | |
180 { | |
181 sizeok = 2; // cannot finish; flag as forward referenced | |
182 return; | |
183 } | |
184 } | |
185 if (t->ty == Tident) | |
186 { | |
187 sizeok = 2; // cannot finish; flag as forward referenced | |
188 return; | |
189 } | |
190 | |
191 memsize = v->type->size(loc); | |
192 memalignsize = v->type->alignsize(); | |
193 xalign = v->type->memalign(sc->structalign); | |
194 alignmember(xalign, memalignsize, &sc->offset); | |
195 v->offset = sc->offset; | |
196 sc->offset += memsize; | |
197 if (sc->offset > structsize) | |
198 structsize = sc->offset; | |
199 if (sc->structalign < memalignsize) | |
200 memalignsize = sc->structalign; | |
201 if (alignsize < memalignsize) | |
202 alignsize = memalignsize; | |
203 //printf("\talignsize = %d\n", alignsize); | |
204 | |
205 v->storage_class |= STCfield; | |
206 //printf(" addField '%s' to '%s' at offset %d, size = %d\n", v->toChars(), toChars(), v->offset, memsize); | |
207 fields.push(v); | |
208 } | |
209 | |
210 | |
211 /********************************* StructDeclaration ****************************/ | |
212 | |
213 StructDeclaration::StructDeclaration(Loc loc, Identifier *id) | |
214 : AggregateDeclaration(loc, id) | |
215 { | |
216 zeroInit = 0; // assume false until we do semantic processing | |
217 | |
218 // For forward references | |
219 type = new TypeStruct(this); | |
220 } | |
221 | |
222 Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s) | |
223 { | |
224 StructDeclaration *sd; | |
225 | |
226 if (s) | |
227 sd = (StructDeclaration *)s; | |
228 else | |
229 sd = new StructDeclaration(loc, ident); | |
230 ScopeDsymbol::syntaxCopy(sd); | |
231 return sd; | |
232 } | |
233 | |
234 void StructDeclaration::semantic(Scope *sc) | |
235 { int i; | |
236 Scope *sc2; | |
237 | |
238 //printf("+StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
239 | |
240 //static int count; if (++count == 20) *(char*)0=0; | |
241 | |
242 assert(type); | |
243 if (!members) // if forward reference | |
244 return; | |
245 | |
246 if (symtab) | |
247 { if (!scope) | |
248 return; // semantic() already completed | |
249 } | |
250 else | |
251 symtab = new DsymbolTable(); | |
252 | |
253 Scope *scx = NULL; | |
254 if (scope) | |
255 { sc = scope; | |
256 scx = scope; // save so we don't make redundant copies | |
257 scope = NULL; | |
258 } | |
259 | |
260 parent = sc->parent; | |
261 handle = type->pointerTo(); | |
262 structalign = sc->structalign; | |
263 protection = sc->protection; | |
264 assert(!isAnonymous()); | |
265 if (sc->stc & STCabstract) | |
266 error("structs, unions cannot be abstract"); | |
267 | |
268 if (sizeok == 0) // if not already done the addMember step | |
269 { | |
270 for (i = 0; i < members->dim; i++) | |
271 { | |
272 Dsymbol *s = (Dsymbol *)members->data[i]; | |
273 //printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars()); | |
274 s->addMember(sc, this, 1); | |
275 } | |
276 } | |
277 | |
278 sizeok = 0; | |
279 sc2 = sc->push(this); | |
280 sc2->stc = 0; | |
281 sc2->parent = this; | |
282 if (isUnionDeclaration()) | |
283 sc2->inunion = 1; | |
284 sc2->protection = PROTpublic; | |
285 sc2->explicitProtection = 0; | |
286 | |
287 int members_dim = members->dim; | |
288 for (i = 0; i < members_dim; i++) | |
289 { | |
290 Dsymbol *s = (Dsymbol *)members->data[i]; | |
291 s->semantic(sc2); | |
292 if (isUnionDeclaration()) | |
293 sc2->offset = 0; | |
294 #if 0 | |
295 if (sizeok == 2) | |
296 { //printf("forward reference\n"); | |
297 break; | |
298 } | |
299 #endif | |
300 } | |
301 | |
302 /* The TypeInfo_Struct is expecting an opEquals and opCmp with | |
303 * a parameter that is a pointer to the struct. But if there | |
304 * isn't one, but is an opEquals or opCmp with a value, write | |
305 * another that is a shell around the value: | |
306 * int opCmp(struct *p) { return opCmp(*p); } | |
307 */ | |
308 | |
309 TypeFunction *tfeqptr; | |
310 { | |
311 Arguments *arguments = new Arguments; | |
312 Argument *arg = new Argument(STCin, handle, Id::p, NULL); | |
313 | |
314 arguments->push(arg); | |
315 tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
316 tfeqptr = (TypeFunction *)tfeqptr->semantic(0, sc); | |
317 } | |
318 | |
319 TypeFunction *tfeq; | |
320 { | |
321 Arguments *arguments = new Arguments; | |
322 Argument *arg = new Argument(STCin, type, NULL, NULL); | |
323 | |
324 arguments->push(arg); | |
325 tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd); | |
326 tfeq = (TypeFunction *)tfeq->semantic(0, sc); | |
327 } | |
328 | |
329 Identifier *id = Id::eq; | |
330 for (int i = 0; i < 2; i++) | |
331 { | |
332 Dsymbol *s = search_function(this, id); | |
333 FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL; | |
334 if (fdx) | |
335 { FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr); | |
336 if (!fd) | |
337 { fd = fdx->overloadExactMatch(tfeq); | |
338 if (fd) | |
339 { // Create the thunk, fdptr | |
340 FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr); | |
341 Expression *e = new IdentifierExp(loc, Id::p); | |
342 e = new PtrExp(loc, e); | |
343 Expressions *args = new Expressions(); | |
344 args->push(e); | |
345 e = new IdentifierExp(loc, id); | |
346 e = new CallExp(loc, e, args); | |
347 fdptr->fbody = new ReturnStatement(loc, e); | |
348 ScopeDsymbol *s = fdx->parent->isScopeDsymbol(); | |
349 assert(s); | |
350 s->members->push(fdptr); | |
351 fdptr->addMember(sc, s, 1); | |
352 fdptr->semantic(sc2); | |
353 } | |
354 } | |
355 } | |
356 | |
357 id = Id::cmp; | |
358 } | |
359 | |
360 | |
361 sc2->pop(); | |
362 | |
363 if (sizeok == 2) | |
364 { // semantic() failed because of forward references. | |
365 // Unwind what we did, and defer it for later | |
366 fields.setDim(0); | |
367 structsize = 0; | |
368 alignsize = 0; | |
369 structalign = 0; | |
370 | |
371 scope = scx ? scx : new Scope(*sc); | |
372 scope->setNoFree(); | |
373 scope->module->addDeferredSemantic(this); | |
374 //printf("\tdeferring %s\n", toChars()); | |
375 return; | |
376 } | |
377 | |
378 // 0 sized struct's are set to 1 byte | |
379 if (structsize == 0) | |
380 { | |
381 structsize = 1; | |
382 alignsize = 1; | |
383 } | |
384 | |
385 // Round struct size up to next alignsize boundary. | |
386 // This will ensure that arrays of structs will get their internals | |
387 // aligned properly. | |
388 structsize = (structsize + alignsize - 1) & ~(alignsize - 1); | |
389 | |
390 sizeok = 1; | |
391 Module::dprogress++; | |
392 | |
393 //printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); | |
394 | |
395 // Determine if struct is all zeros or not | |
396 zeroInit = 1; | |
397 for (i = 0; i < fields.dim; i++) | |
398 { | |
399 Dsymbol *s = (Dsymbol *)fields.data[i]; | |
400 VarDeclaration *vd = s->isVarDeclaration(); | |
401 if (vd && !vd->isDataseg()) | |
402 { | |
403 if (vd->init) | |
404 { | |
405 // Should examine init to see if it is really all 0's | |
406 zeroInit = 0; | |
407 break; | |
408 } | |
409 else | |
410 { | |
411 if (!vd->type->isZeroInit()) | |
412 { | |
413 zeroInit = 0; | |
414 break; | |
415 } | |
416 } | |
417 } | |
418 } | |
419 | |
420 /* Look for special member functions. | |
421 */ | |
422 inv = (InvariantDeclaration *)search(0, Id::classInvariant, 0); | |
423 aggNew = (NewDeclaration *)search(0, Id::classNew, 0); | |
424 aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); | |
425 | |
426 if (sc->func) | |
427 { | |
428 semantic2(sc); | |
429 semantic3(sc); | |
430 } | |
431 } | |
432 | |
433 void StructDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
434 { int i; | |
435 | |
436 buf->printf("%s ", kind()); | |
437 if (!isAnonymous()) | |
438 buf->writestring(toChars()); | |
439 if (!members) | |
440 { | |
441 buf->writeByte(';'); | |
442 buf->writenl(); | |
443 return; | |
444 } | |
445 buf->writenl(); | |
446 buf->writeByte('{'); | |
447 buf->writenl(); | |
448 for (i = 0; i < members->dim; i++) | |
449 { | |
450 Dsymbol *s = (Dsymbol *)members->data[i]; | |
451 | |
452 buf->writestring(" "); | |
453 s->toCBuffer(buf, hgs); | |
454 } | |
455 buf->writeByte('}'); | |
456 buf->writenl(); | |
457 } | |
458 | |
459 | |
460 char *StructDeclaration::kind() | |
461 { | |
462 return "struct"; | |
463 } | |
464 | |
465 /********************************* UnionDeclaration ****************************/ | |
466 | |
467 UnionDeclaration::UnionDeclaration(Loc loc, Identifier *id) | |
468 : StructDeclaration(loc, id) | |
469 { | |
470 } | |
471 | |
472 Dsymbol *UnionDeclaration::syntaxCopy(Dsymbol *s) | |
473 { | |
474 UnionDeclaration *ud; | |
475 | |
476 if (s) | |
477 ud = (UnionDeclaration *)s; | |
478 else | |
479 ud = new UnionDeclaration(loc, ident); | |
480 StructDeclaration::syntaxCopy(ud); | |
481 return ud; | |
482 } | |
483 | |
484 | |
485 char *UnionDeclaration::kind() | |
486 { | |
487 return "union"; | |
488 } | |
489 | |
490 |