Mercurial > projects > ldc
comparison dmd2/statement.c @ 758:f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 11 Nov 2008 01:38:48 +0100 |
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children | f08e0ff8d28c |
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1 | |
2 // Compiler implementation of the D programming language | |
3 // Copyright (c) 1999-2008 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 <stdlib.h> | |
13 #include <assert.h> | |
14 | |
15 #include "mem.h" | |
16 | |
17 #include "statement.h" | |
18 #include "expression.h" | |
19 #include "cond.h" | |
20 #include "init.h" | |
21 #include "staticassert.h" | |
22 #include "mtype.h" | |
23 #include "scope.h" | |
24 #include "declaration.h" | |
25 #include "aggregate.h" | |
26 #include "id.h" | |
27 #include "hdrgen.h" | |
28 #include "parse.h" | |
29 #include "template.h" | |
30 | |
31 /******************************** Statement ***************************/ | |
32 | |
33 Statement::Statement(Loc loc) | |
34 : loc(loc) | |
35 { | |
36 #ifdef _DH | |
37 // If this is an in{} contract scope statement (skip for determining | |
38 // inlineStatus of a function body for header content) | |
39 incontract = 0; | |
40 #endif | |
41 } | |
42 | |
43 Statement *Statement::syntaxCopy() | |
44 { | |
45 assert(0); | |
46 return NULL; | |
47 } | |
48 | |
49 void Statement::print() | |
50 { | |
51 fprintf(stdmsg, "%s\n", toChars()); | |
52 fflush(stdmsg); | |
53 } | |
54 | |
55 char *Statement::toChars() | |
56 { OutBuffer *buf; | |
57 HdrGenState hgs; | |
58 | |
59 buf = new OutBuffer(); | |
60 toCBuffer(buf, &hgs); | |
61 return buf->toChars(); | |
62 } | |
63 | |
64 void Statement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
65 { | |
66 buf->printf("Statement::toCBuffer()"); | |
67 buf->writenl(); | |
68 } | |
69 | |
70 Statement *Statement::semantic(Scope *sc) | |
71 { | |
72 return this; | |
73 } | |
74 | |
75 // Same as semantic(), but do create a new scope | |
76 | |
77 Statement *Statement::semanticScope(Scope *sc, Statement *sbreak, Statement *scontinue) | |
78 { Scope *scd; | |
79 Statement *s; | |
80 | |
81 scd = sc->push(); | |
82 if (sbreak) | |
83 scd->sbreak = sbreak; | |
84 if (scontinue) | |
85 scd->scontinue = scontinue; | |
86 s = semantic(scd); | |
87 scd->pop(); | |
88 return s; | |
89 } | |
90 | |
91 void Statement::error(const char *format, ...) | |
92 { | |
93 va_list ap; | |
94 va_start(ap, format); | |
95 ::verror(loc, format, ap); | |
96 va_end( ap ); | |
97 } | |
98 | |
99 int Statement::hasBreak() | |
100 { | |
101 //printf("Statement::hasBreak()\n"); | |
102 return FALSE; | |
103 } | |
104 | |
105 int Statement::hasContinue() | |
106 { | |
107 return FALSE; | |
108 } | |
109 | |
110 // TRUE if statement uses exception handling | |
111 | |
112 int Statement::usesEH() | |
113 { | |
114 return FALSE; | |
115 } | |
116 | |
117 /* Only valid after semantic analysis | |
118 */ | |
119 int Statement::blockExit() | |
120 { | |
121 printf("Statement::blockExit(%p)\n", this); | |
122 printf("%s\n", toChars()); | |
123 assert(0); | |
124 return BEany; | |
125 } | |
126 | |
127 // TRUE if statement may fall off the end without a throw or return | |
128 | |
129 int Statement::fallOffEnd() | |
130 { | |
131 return TRUE; | |
132 } | |
133 | |
134 // TRUE if statement 'comes from' somewhere else, like a goto | |
135 | |
136 int Statement::comeFrom() | |
137 { | |
138 //printf("Statement::comeFrom()\n"); | |
139 return FALSE; | |
140 } | |
141 | |
142 /**************************************** | |
143 * If this statement has code that needs to run in a finally clause | |
144 * at the end of the current scope, return that code in the form of | |
145 * a Statement. | |
146 * Output: | |
147 * *sentry code executed upon entry to the scope | |
148 * *sexception code executed upon exit from the scope via exception | |
149 * *sfinally code executed in finally block | |
150 */ | |
151 | |
152 void Statement::scopeCode(Scope *sc, Statement **sentry, Statement **sexception, Statement **sfinally) | |
153 { | |
154 //printf("Statement::scopeCode()\n"); | |
155 //print(); | |
156 *sentry = NULL; | |
157 *sexception = NULL; | |
158 *sfinally = NULL; | |
159 } | |
160 | |
161 /********************************* | |
162 * Flatten out the scope by presenting the statement | |
163 * as an array of statements. | |
164 * Returns NULL if no flattening necessary. | |
165 */ | |
166 | |
167 Statements *Statement::flatten(Scope *sc) | |
168 { | |
169 return NULL; | |
170 } | |
171 | |
172 | |
173 /******************************** ExpStatement ***************************/ | |
174 | |
175 ExpStatement::ExpStatement(Loc loc, Expression *exp) | |
176 : Statement(loc) | |
177 { | |
178 this->exp = exp; | |
179 } | |
180 | |
181 Statement *ExpStatement::syntaxCopy() | |
182 { | |
183 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
184 ExpStatement *es = new ExpStatement(loc, e); | |
185 return es; | |
186 } | |
187 | |
188 void ExpStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
189 { | |
190 if (exp) | |
191 exp->toCBuffer(buf, hgs); | |
192 buf->writeByte(';'); | |
193 if (!hgs->FLinit.init) | |
194 buf->writenl(); | |
195 } | |
196 | |
197 Statement *ExpStatement::semantic(Scope *sc) | |
198 { | |
199 if (exp) | |
200 { | |
201 //printf("ExpStatement::semantic() %s\n", exp->toChars()); | |
202 exp = exp->semantic(sc); | |
203 exp = resolveProperties(sc, exp); | |
204 exp->checkSideEffect(0); | |
205 exp = exp->optimize(0); | |
206 if (exp->op == TOKdeclaration && !isDeclarationStatement()) | |
207 { Statement *s = new DeclarationStatement(loc, exp); | |
208 return s; | |
209 } | |
210 //exp = exp->optimize(isDeclarationStatement() ? WANTvalue : 0); | |
211 } | |
212 return this; | |
213 } | |
214 | |
215 int ExpStatement::blockExit() | |
216 { int result = BEfallthru; | |
217 | |
218 if (exp) | |
219 { | |
220 if (exp->op == TOKhalt) | |
221 return BEhalt; | |
222 if (exp->op == TOKassert) | |
223 { AssertExp *a = (AssertExp *)exp; | |
224 | |
225 if (a->e1->isBool(FALSE)) // if it's an assert(0) | |
226 return BEhalt; | |
227 } | |
228 if (exp->canThrow()) | |
229 result |= BEthrow; | |
230 } | |
231 return result; | |
232 } | |
233 | |
234 int ExpStatement::fallOffEnd() | |
235 { | |
236 if (exp) | |
237 { | |
238 if (exp->op == TOKassert) | |
239 { AssertExp *a = (AssertExp *)exp; | |
240 | |
241 if (a->e1->isBool(FALSE)) // if it's an assert(0) | |
242 return FALSE; | |
243 } | |
244 else if (exp->op == TOKhalt) | |
245 return FALSE; | |
246 } | |
247 return TRUE; | |
248 } | |
249 | |
250 /******************************** CompileStatement ***************************/ | |
251 | |
252 CompileStatement::CompileStatement(Loc loc, Expression *exp) | |
253 : Statement(loc) | |
254 { | |
255 this->exp = exp; | |
256 } | |
257 | |
258 Statement *CompileStatement::syntaxCopy() | |
259 { | |
260 Expression *e = exp->syntaxCopy(); | |
261 CompileStatement *es = new CompileStatement(loc, e); | |
262 return es; | |
263 } | |
264 | |
265 void CompileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
266 { | |
267 buf->writestring("mixin("); | |
268 exp->toCBuffer(buf, hgs); | |
269 buf->writestring(");"); | |
270 if (!hgs->FLinit.init) | |
271 buf->writenl(); | |
272 } | |
273 | |
274 Statements *CompileStatement::flatten(Scope *sc) | |
275 { | |
276 //printf("CompileStatement::flatten() %s\n", exp->toChars()); | |
277 exp = exp->semantic(sc); | |
278 exp = resolveProperties(sc, exp); | |
279 exp = exp->optimize(WANTvalue | WANTinterpret); | |
280 if (exp->op != TOKstring) | |
281 { error("argument to mixin must be a string, not (%s)", exp->toChars()); | |
282 return NULL; | |
283 } | |
284 StringExp *se = (StringExp *)exp; | |
285 se = se->toUTF8(sc); | |
286 Parser p(sc->module, (unsigned char *)se->string, se->len, 0); | |
287 p.loc = loc; | |
288 p.nextToken(); | |
289 | |
290 Statements *a = new Statements(); | |
291 while (p.token.value != TOKeof) | |
292 { | |
293 Statement *s = p.parseStatement(PSsemi | PScurlyscope); | |
294 a->push(s); | |
295 } | |
296 return a; | |
297 } | |
298 | |
299 Statement *CompileStatement::semantic(Scope *sc) | |
300 { | |
301 //printf("CompileStatement::semantic() %s\n", exp->toChars()); | |
302 Statements *a = flatten(sc); | |
303 if (!a) | |
304 return NULL; | |
305 Statement *s = new CompoundStatement(loc, a); | |
306 return s->semantic(sc); | |
307 } | |
308 | |
309 | |
310 /******************************** DeclarationStatement ***************************/ | |
311 | |
312 DeclarationStatement::DeclarationStatement(Loc loc, Dsymbol *declaration) | |
313 : ExpStatement(loc, new DeclarationExp(loc, declaration)) | |
314 { | |
315 } | |
316 | |
317 DeclarationStatement::DeclarationStatement(Loc loc, Expression *exp) | |
318 : ExpStatement(loc, exp) | |
319 { | |
320 } | |
321 | |
322 Statement *DeclarationStatement::syntaxCopy() | |
323 { | |
324 DeclarationStatement *ds = new DeclarationStatement(loc, exp->syntaxCopy()); | |
325 return ds; | |
326 } | |
327 | |
328 void DeclarationStatement::scopeCode(Scope *sc, Statement **sentry, Statement **sexception, Statement **sfinally) | |
329 { | |
330 //printf("DeclarationStatement::scopeCode()\n"); | |
331 //print(); | |
332 | |
333 *sentry = NULL; | |
334 *sexception = NULL; | |
335 *sfinally = NULL; | |
336 | |
337 if (exp) | |
338 { | |
339 if (exp->op == TOKdeclaration) | |
340 { | |
341 DeclarationExp *de = (DeclarationExp *)(exp); | |
342 VarDeclaration *v = de->declaration->isVarDeclaration(); | |
343 if (v) | |
344 { Expression *e; | |
345 | |
346 e = v->callAutoDtor(sc); | |
347 if (e) | |
348 { | |
349 //printf("dtor is: "); e->print(); | |
350 *sfinally = new ExpStatement(loc, e); | |
351 } | |
352 } | |
353 } | |
354 } | |
355 } | |
356 | |
357 void DeclarationStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
358 { | |
359 exp->toCBuffer(buf, hgs); | |
360 } | |
361 | |
362 | |
363 /******************************** CompoundStatement ***************************/ | |
364 | |
365 CompoundStatement::CompoundStatement(Loc loc, Statements *s) | |
366 : Statement(loc) | |
367 { | |
368 statements = s; | |
369 } | |
370 | |
371 CompoundStatement::CompoundStatement(Loc loc, Statement *s1, Statement *s2) | |
372 : Statement(loc) | |
373 { | |
374 statements = new Statements(); | |
375 statements->reserve(2); | |
376 statements->push(s1); | |
377 statements->push(s2); | |
378 } | |
379 | |
380 Statement *CompoundStatement::syntaxCopy() | |
381 { | |
382 Statements *a = new Statements(); | |
383 a->setDim(statements->dim); | |
384 for (size_t i = 0; i < statements->dim; i++) | |
385 { Statement *s = (Statement *)statements->data[i]; | |
386 if (s) | |
387 s = s->syntaxCopy(); | |
388 a->data[i] = s; | |
389 } | |
390 CompoundStatement *cs = new CompoundStatement(loc, a); | |
391 return cs; | |
392 } | |
393 | |
394 | |
395 Statement *CompoundStatement::semantic(Scope *sc) | |
396 { Statement *s; | |
397 | |
398 //printf("CompoundStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
399 | |
400 for (size_t i = 0; i < statements->dim; ) | |
401 { | |
402 s = (Statement *) statements->data[i]; | |
403 if (s) | |
404 { Statements *a = s->flatten(sc); | |
405 | |
406 if (a) | |
407 { | |
408 statements->remove(i); | |
409 statements->insert(i, a); | |
410 continue; | |
411 } | |
412 s = s->semantic(sc); | |
413 statements->data[i] = s; | |
414 if (s) | |
415 { | |
416 Statement *sentry; | |
417 Statement *sexception; | |
418 Statement *sfinally; | |
419 | |
420 s->scopeCode(sc, &sentry, &sexception, &sfinally); | |
421 if (sentry) | |
422 { | |
423 sentry = sentry->semantic(sc); | |
424 statements->data[i] = sentry; | |
425 } | |
426 if (sexception) | |
427 { | |
428 if (i + 1 == statements->dim && !sfinally) | |
429 { | |
430 #if 1 | |
431 sexception = sexception->semantic(sc); | |
432 #else | |
433 statements->push(sexception); | |
434 if (sfinally) | |
435 // Assume sexception does not throw | |
436 statements->push(sfinally); | |
437 #endif | |
438 } | |
439 else | |
440 { | |
441 /* Rewrite: | |
442 * s; s1; s2; | |
443 * As: | |
444 * s; | |
445 * try { s1; s2; } | |
446 * catch (Object __o) | |
447 * { sexception; throw __o; } | |
448 */ | |
449 Statement *body; | |
450 Statements *a = new Statements(); | |
451 | |
452 for (int j = i + 1; j < statements->dim; j++) | |
453 { | |
454 a->push(statements->data[j]); | |
455 } | |
456 body = new CompoundStatement(0, a); | |
457 body = new ScopeStatement(0, body); | |
458 | |
459 Identifier *id = Lexer::uniqueId("__o"); | |
460 | |
461 Statement *handler = new ThrowStatement(0, new IdentifierExp(0, id)); | |
462 handler = new CompoundStatement(0, sexception, handler); | |
463 | |
464 Array *catches = new Array(); | |
465 Catch *ctch = new Catch(0, NULL, id, handler); | |
466 catches->push(ctch); | |
467 s = new TryCatchStatement(0, body, catches); | |
468 | |
469 if (sfinally) | |
470 s = new TryFinallyStatement(0, s, sfinally); | |
471 s = s->semantic(sc); | |
472 statements->setDim(i + 1); | |
473 statements->push(s); | |
474 break; | |
475 } | |
476 } | |
477 else if (sfinally) | |
478 { | |
479 if (0 && i + 1 == statements->dim) | |
480 { | |
481 statements->push(sfinally); | |
482 } | |
483 else | |
484 { | |
485 /* Rewrite: | |
486 * s; s1; s2; | |
487 * As: | |
488 * s; try { s1; s2; } finally { sfinally; } | |
489 */ | |
490 Statement *body; | |
491 Statements *a = new Statements(); | |
492 | |
493 for (int j = i + 1; j < statements->dim; j++) | |
494 { | |
495 a->push(statements->data[j]); | |
496 } | |
497 body = new CompoundStatement(0, a); | |
498 s = new TryFinallyStatement(0, body, sfinally); | |
499 s = s->semantic(sc); | |
500 statements->setDim(i + 1); | |
501 statements->push(s); | |
502 break; | |
503 } | |
504 } | |
505 } | |
506 } | |
507 i++; | |
508 } | |
509 if (statements->dim == 1 && !isAsmBlockStatement()) | |
510 { | |
511 return (Statement *)statements->data[0]; | |
512 } | |
513 return this; | |
514 } | |
515 | |
516 Statements *CompoundStatement::flatten(Scope *sc) | |
517 { | |
518 return statements; | |
519 } | |
520 | |
521 ReturnStatement *CompoundStatement::isReturnStatement() | |
522 { | |
523 ReturnStatement *rs = NULL; | |
524 | |
525 for (int i = 0; i < statements->dim; i++) | |
526 { Statement *s = (Statement *) statements->data[i]; | |
527 if (s) | |
528 { | |
529 rs = s->isReturnStatement(); | |
530 if (rs) | |
531 break; | |
532 } | |
533 } | |
534 return rs; | |
535 } | |
536 | |
537 void CompoundStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
538 { | |
539 for (int i = 0; i < statements->dim; i++) | |
540 { Statement *s = (Statement *) statements->data[i]; | |
541 if (s) | |
542 s->toCBuffer(buf, hgs); | |
543 } | |
544 } | |
545 | |
546 int CompoundStatement::usesEH() | |
547 { | |
548 for (int i = 0; i < statements->dim; i++) | |
549 { Statement *s = (Statement *) statements->data[i]; | |
550 if (s && s->usesEH()) | |
551 return TRUE; | |
552 } | |
553 return FALSE; | |
554 } | |
555 | |
556 int CompoundStatement::blockExit() | |
557 { | |
558 //printf("CompoundStatement::blockExit(%p) %d\n", this, statements->dim); | |
559 int result = BEfallthru; | |
560 for (size_t i = 0; i < statements->dim; i++) | |
561 { Statement *s = (Statement *) statements->data[i]; | |
562 if (s) | |
563 { | |
564 //printf("result = x%x\n", result); | |
565 //printf("%s\n", s->toChars()); | |
566 if (!(result & BEfallthru) && !s->comeFrom()) | |
567 { | |
568 if (global.params.warnings) | |
569 { fprintf(stdmsg, "warning - "); | |
570 s->error("statement is not reachable"); | |
571 } | |
572 } | |
573 | |
574 result &= ~BEfallthru; | |
575 result |= s->blockExit(); | |
576 } | |
577 } | |
578 return result; | |
579 } | |
580 | |
581 int CompoundStatement::fallOffEnd() | |
582 { int falloff = TRUE; | |
583 | |
584 //printf("CompoundStatement::fallOffEnd() %s\n", toChars()); | |
585 for (int i = 0; i < statements->dim; i++) | |
586 { Statement *s = (Statement *)statements->data[i]; | |
587 | |
588 if (!s) | |
589 continue; | |
590 | |
591 #if 0 | |
592 if (!falloff && global.params.warnings && !s->comeFrom()) | |
593 { | |
594 warning("%s: statement is not reachable", s->loc.toChars()); | |
595 } | |
596 #endif | |
597 falloff = s->fallOffEnd(); | |
598 } | |
599 return falloff; | |
600 } | |
601 | |
602 int CompoundStatement::comeFrom() | |
603 { int comefrom = FALSE; | |
604 | |
605 //printf("CompoundStatement::comeFrom()\n"); | |
606 for (int i = 0; i < statements->dim; i++) | |
607 { Statement *s = (Statement *)statements->data[i]; | |
608 | |
609 if (!s) | |
610 continue; | |
611 | |
612 comefrom |= s->comeFrom(); | |
613 } | |
614 return comefrom; | |
615 } | |
616 | |
617 | |
618 /**************************** UnrolledLoopStatement ***************************/ | |
619 | |
620 UnrolledLoopStatement::UnrolledLoopStatement(Loc loc, Statements *s) | |
621 : Statement(loc) | |
622 { | |
623 statements = s; | |
624 enclosinghandler = NULL; | |
625 } | |
626 | |
627 Statement *UnrolledLoopStatement::syntaxCopy() | |
628 { | |
629 Statements *a = new Statements(); | |
630 a->setDim(statements->dim); | |
631 for (size_t i = 0; i < statements->dim; i++) | |
632 { Statement *s = (Statement *)statements->data[i]; | |
633 if (s) | |
634 s = s->syntaxCopy(); | |
635 a->data[i] = s; | |
636 } | |
637 UnrolledLoopStatement *cs = new UnrolledLoopStatement(loc, a); | |
638 return cs; | |
639 } | |
640 | |
641 | |
642 Statement *UnrolledLoopStatement::semantic(Scope *sc) | |
643 { | |
644 //printf("UnrolledLoopStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
645 | |
646 enclosinghandler = sc->tfOfTry; | |
647 | |
648 sc->noctor++; | |
649 Scope *scd = sc->push(); | |
650 scd->sbreak = this; | |
651 scd->scontinue = this; | |
652 | |
653 for (size_t i = 0; i < statements->dim; i++) | |
654 { | |
655 Statement *s = (Statement *) statements->data[i]; | |
656 if (s) | |
657 { | |
658 s = s->semantic(scd); | |
659 statements->data[i] = s; | |
660 } | |
661 } | |
662 | |
663 scd->pop(); | |
664 sc->noctor--; | |
665 return this; | |
666 } | |
667 | |
668 void UnrolledLoopStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
669 { | |
670 buf->writestring("unrolled {"); | |
671 buf->writenl(); | |
672 | |
673 for (size_t i = 0; i < statements->dim; i++) | |
674 { Statement *s; | |
675 | |
676 s = (Statement *) statements->data[i]; | |
677 if (s) | |
678 s->toCBuffer(buf, hgs); | |
679 } | |
680 | |
681 buf->writeByte('}'); | |
682 buf->writenl(); | |
683 } | |
684 | |
685 int UnrolledLoopStatement::hasBreak() | |
686 { | |
687 return TRUE; | |
688 } | |
689 | |
690 int UnrolledLoopStatement::hasContinue() | |
691 { | |
692 return TRUE; | |
693 } | |
694 | |
695 int UnrolledLoopStatement::usesEH() | |
696 { | |
697 for (size_t i = 0; i < statements->dim; i++) | |
698 { Statement *s = (Statement *) statements->data[i]; | |
699 if (s && s->usesEH()) | |
700 return TRUE; | |
701 } | |
702 return FALSE; | |
703 } | |
704 | |
705 int UnrolledLoopStatement::blockExit() | |
706 { | |
707 int result = BEfallthru; | |
708 for (size_t i = 0; i < statements->dim; i++) | |
709 { Statement *s = (Statement *) statements->data[i]; | |
710 if (s) | |
711 { | |
712 int r = s->blockExit(); | |
713 result |= r & ~(BEbreak | BEcontinue); | |
714 } | |
715 } | |
716 return result; | |
717 } | |
718 | |
719 int UnrolledLoopStatement::fallOffEnd() | |
720 { | |
721 //printf("UnrolledLoopStatement::fallOffEnd()\n"); | |
722 for (size_t i = 0; i < statements->dim; i++) | |
723 { Statement *s = (Statement *)statements->data[i]; | |
724 | |
725 if (s) | |
726 s->fallOffEnd(); | |
727 } | |
728 return TRUE; | |
729 } | |
730 | |
731 int UnrolledLoopStatement::comeFrom() | |
732 { int comefrom = FALSE; | |
733 | |
734 //printf("UnrolledLoopStatement::comeFrom()\n"); | |
735 for (size_t i = 0; i < statements->dim; i++) | |
736 { Statement *s = (Statement *)statements->data[i]; | |
737 | |
738 if (!s) | |
739 continue; | |
740 | |
741 comefrom |= s->comeFrom(); | |
742 } | |
743 return comefrom; | |
744 } | |
745 | |
746 | |
747 /******************************** ScopeStatement ***************************/ | |
748 | |
749 ScopeStatement::ScopeStatement(Loc loc, Statement *s) | |
750 : Statement(loc) | |
751 { | |
752 this->statement = s; | |
753 } | |
754 | |
755 Statement *ScopeStatement::syntaxCopy() | |
756 { | |
757 Statement *s; | |
758 | |
759 s = statement ? statement->syntaxCopy() : NULL; | |
760 s = new ScopeStatement(loc, s); | |
761 return s; | |
762 } | |
763 | |
764 | |
765 Statement *ScopeStatement::semantic(Scope *sc) | |
766 { ScopeDsymbol *sym; | |
767 | |
768 //printf("ScopeStatement::semantic(sc = %p)\n", sc); | |
769 if (statement) | |
770 { Statements *a; | |
771 | |
772 sym = new ScopeDsymbol(); | |
773 sym->parent = sc->scopesym; | |
774 sc = sc->push(sym); | |
775 | |
776 a = statement->flatten(sc); | |
777 if (a) | |
778 { | |
779 statement = new CompoundStatement(loc, a); | |
780 } | |
781 | |
782 statement = statement->semantic(sc); | |
783 if (statement) | |
784 { | |
785 Statement *sentry; | |
786 Statement *sexception; | |
787 Statement *sfinally; | |
788 | |
789 statement->scopeCode(sc, &sentry, &sexception, &sfinally); | |
790 if (sfinally) | |
791 { | |
792 //printf("adding sfinally\n"); | |
793 statement = new CompoundStatement(loc, statement, sfinally); | |
794 } | |
795 } | |
796 | |
797 sc->pop(); | |
798 } | |
799 return this; | |
800 } | |
801 | |
802 int ScopeStatement::hasBreak() | |
803 { | |
804 //printf("ScopeStatement::hasBreak() %s\n", toChars()); | |
805 return statement ? statement->hasBreak() : FALSE; | |
806 } | |
807 | |
808 int ScopeStatement::hasContinue() | |
809 { | |
810 return statement ? statement->hasContinue() : FALSE; | |
811 } | |
812 | |
813 int ScopeStatement::usesEH() | |
814 { | |
815 return statement ? statement->usesEH() : FALSE; | |
816 } | |
817 | |
818 int ScopeStatement::blockExit() | |
819 { | |
820 //printf("ScopeStatement::blockExit(%p)\n", statement); | |
821 return statement ? statement->blockExit() : BEfallthru; | |
822 } | |
823 | |
824 int ScopeStatement::fallOffEnd() | |
825 { | |
826 return statement ? statement->fallOffEnd() : TRUE; | |
827 } | |
828 | |
829 int ScopeStatement::comeFrom() | |
830 { | |
831 //printf("ScopeStatement::comeFrom()\n"); | |
832 return statement ? statement->comeFrom() : FALSE; | |
833 } | |
834 | |
835 void ScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
836 { | |
837 buf->writeByte('{'); | |
838 buf->writenl(); | |
839 | |
840 if (statement) | |
841 statement->toCBuffer(buf, hgs); | |
842 | |
843 buf->writeByte('}'); | |
844 buf->writenl(); | |
845 } | |
846 | |
847 /******************************** WhileStatement ***************************/ | |
848 | |
849 WhileStatement::WhileStatement(Loc loc, Expression *c, Statement *b) | |
850 : Statement(loc) | |
851 { | |
852 condition = c; | |
853 body = b; | |
854 enclosinghandler = NULL; | |
855 } | |
856 | |
857 Statement *WhileStatement::syntaxCopy() | |
858 { | |
859 WhileStatement *s = new WhileStatement(loc, condition->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
860 return s; | |
861 } | |
862 | |
863 | |
864 Statement *WhileStatement::semantic(Scope *sc) | |
865 { | |
866 #if 0 | |
867 if (condition->op == TOKmatch) | |
868 { | |
869 /* Rewrite while (condition) body as: | |
870 * if (condition) | |
871 * do | |
872 * body | |
873 * while ((_match = _match.opNext), _match); | |
874 */ | |
875 | |
876 Expression *ew = new IdentifierExp(0, Id::_match); | |
877 ew = new DotIdExp(0, ew, Id::next); | |
878 ew = new AssignExp(0, new IdentifierExp(0, Id::_match), ew); | |
879 ////ew = new EqualExp(TOKnotequal, 0, ew, new NullExp(0)); | |
880 Expression *ev = new IdentifierExp(0, Id::_match); | |
881 //ev = new CastExp(0, ev, Type::tvoidptr); | |
882 ew = new CommaExp(0, ew, ev); | |
883 Statement *sw = new DoStatement(loc, body, ew); | |
884 Statement *si = new IfStatement(loc, condition, sw, NULL); | |
885 return si->semantic(sc); | |
886 } | |
887 #endif | |
888 | |
889 enclosinghandler = sc->tfOfTry; | |
890 | |
891 condition = condition->semantic(sc); | |
892 condition = resolveProperties(sc, condition); | |
893 condition = condition->optimize(WANTvalue); | |
894 condition = condition->checkToBoolean(); | |
895 | |
896 sc->noctor++; | |
897 | |
898 Scope *scd = sc->push(); | |
899 scd->sbreak = this; | |
900 scd->scontinue = this; | |
901 if (body) | |
902 body = body->semantic(scd); | |
903 scd->pop(); | |
904 | |
905 sc->noctor--; | |
906 | |
907 return this; | |
908 } | |
909 | |
910 int WhileStatement::hasBreak() | |
911 { | |
912 return TRUE; | |
913 } | |
914 | |
915 int WhileStatement::hasContinue() | |
916 { | |
917 return TRUE; | |
918 } | |
919 | |
920 int WhileStatement::usesEH() | |
921 { | |
922 return body ? body->usesEH() : 0; | |
923 } | |
924 | |
925 int WhileStatement::blockExit() | |
926 { | |
927 //printf("WhileStatement::blockExit(%p)\n", this); | |
928 | |
929 int result = BEnone; | |
930 if (condition->canThrow()) | |
931 result |= BEthrow; | |
932 if (condition->isBool(TRUE)) | |
933 { | |
934 if (body) | |
935 { result |= body->blockExit(); | |
936 if (result & BEbreak) | |
937 result |= BEfallthru; | |
938 } | |
939 } | |
940 else if (condition->isBool(FALSE)) | |
941 { | |
942 result |= BEfallthru; | |
943 } | |
944 else | |
945 { | |
946 if (body) | |
947 result |= body->blockExit(); | |
948 result |= BEfallthru; | |
949 } | |
950 result &= ~(BEbreak | BEcontinue); | |
951 return result; | |
952 } | |
953 | |
954 int WhileStatement::fallOffEnd() | |
955 { | |
956 if (body) | |
957 body->fallOffEnd(); | |
958 return TRUE; | |
959 } | |
960 | |
961 int WhileStatement::comeFrom() | |
962 { | |
963 if (body) | |
964 return body->comeFrom(); | |
965 return FALSE; | |
966 } | |
967 | |
968 void WhileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
969 { | |
970 buf->writestring("while ("); | |
971 condition->toCBuffer(buf, hgs); | |
972 buf->writebyte(')'); | |
973 buf->writenl(); | |
974 if (body) | |
975 body->toCBuffer(buf, hgs); | |
976 } | |
977 | |
978 /******************************** DoStatement ***************************/ | |
979 | |
980 DoStatement::DoStatement(Loc loc, Statement *b, Expression *c) | |
981 : Statement(loc) | |
982 { | |
983 body = b; | |
984 condition = c; | |
985 enclosinghandler = NULL; | |
986 } | |
987 | |
988 Statement *DoStatement::syntaxCopy() | |
989 { | |
990 DoStatement *s = new DoStatement(loc, body ? body->syntaxCopy() : NULL, condition->syntaxCopy()); | |
991 return s; | |
992 } | |
993 | |
994 | |
995 Statement *DoStatement::semantic(Scope *sc) | |
996 { | |
997 enclosinghandler = sc->tfOfTry; | |
998 | |
999 sc->noctor++; | |
1000 if (body) | |
1001 body = body->semanticScope(sc, this, this); | |
1002 sc->noctor--; | |
1003 condition = condition->semantic(sc); | |
1004 condition = resolveProperties(sc, condition); | |
1005 condition = condition->optimize(WANTvalue); | |
1006 | |
1007 condition = condition->checkToBoolean(); | |
1008 | |
1009 return this; | |
1010 } | |
1011 | |
1012 int DoStatement::hasBreak() | |
1013 { | |
1014 return TRUE; | |
1015 } | |
1016 | |
1017 int DoStatement::hasContinue() | |
1018 { | |
1019 return TRUE; | |
1020 } | |
1021 | |
1022 int DoStatement::usesEH() | |
1023 { | |
1024 return body ? body->usesEH() : 0; | |
1025 } | |
1026 | |
1027 int DoStatement::blockExit() | |
1028 { int result; | |
1029 | |
1030 if (body) | |
1031 { result = body->blockExit(); | |
1032 if (result == BEbreak) | |
1033 return BEfallthru; | |
1034 if (result & BEcontinue) | |
1035 result |= BEfallthru; | |
1036 } | |
1037 else | |
1038 result = BEfallthru; | |
1039 if (result & BEfallthru) | |
1040 { if (condition->canThrow()) | |
1041 result |= BEthrow; | |
1042 if (!(result & BEbreak) && condition->isBool(TRUE)) | |
1043 result &= ~BEfallthru; | |
1044 } | |
1045 result &= ~(BEbreak | BEcontinue); | |
1046 return result; | |
1047 } | |
1048 | |
1049 int DoStatement::fallOffEnd() | |
1050 { | |
1051 if (body) | |
1052 body->fallOffEnd(); | |
1053 return TRUE; | |
1054 } | |
1055 | |
1056 int DoStatement::comeFrom() | |
1057 { | |
1058 if (body) | |
1059 return body->comeFrom(); | |
1060 return FALSE; | |
1061 } | |
1062 | |
1063 void DoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
1064 { | |
1065 buf->writestring("do"); | |
1066 buf->writenl(); | |
1067 if (body) | |
1068 body->toCBuffer(buf, hgs); | |
1069 buf->writestring("while ("); | |
1070 condition->toCBuffer(buf, hgs); | |
1071 buf->writebyte(')'); | |
1072 } | |
1073 | |
1074 /******************************** ForStatement ***************************/ | |
1075 | |
1076 ForStatement::ForStatement(Loc loc, Statement *init, Expression *condition, Expression *increment, Statement *body) | |
1077 : Statement(loc) | |
1078 { | |
1079 this->init = init; | |
1080 this->condition = condition; | |
1081 this->increment = increment; | |
1082 this->body = body; | |
1083 this->enclosinghandler = NULL; | |
1084 } | |
1085 | |
1086 Statement *ForStatement::syntaxCopy() | |
1087 { | |
1088 Statement *i = NULL; | |
1089 if (init) | |
1090 i = init->syntaxCopy(); | |
1091 Expression *c = NULL; | |
1092 if (condition) | |
1093 c = condition->syntaxCopy(); | |
1094 Expression *inc = NULL; | |
1095 if (increment) | |
1096 inc = increment->syntaxCopy(); | |
1097 ForStatement *s = new ForStatement(loc, i, c, inc, body->syntaxCopy()); | |
1098 return s; | |
1099 } | |
1100 | |
1101 Statement *ForStatement::semantic(Scope *sc) | |
1102 { | |
1103 enclosinghandler = sc->tfOfTry; | |
1104 | |
1105 ScopeDsymbol *sym = new ScopeDsymbol(); | |
1106 sym->parent = sc->scopesym; | |
1107 sc = sc->push(sym); | |
1108 if (init) | |
1109 init = init->semantic(sc); | |
1110 sc->noctor++; | |
1111 if (condition) | |
1112 { | |
1113 condition = condition->semantic(sc); | |
1114 condition = resolveProperties(sc, condition); | |
1115 condition = condition->optimize(WANTvalue); | |
1116 condition = condition->checkToBoolean(); | |
1117 } | |
1118 if (increment) | |
1119 increment = increment->semantic(sc); | |
1120 | |
1121 sc->sbreak = this; | |
1122 sc->scontinue = this; | |
1123 body = body->semantic(sc); | |
1124 sc->noctor--; | |
1125 | |
1126 sc->pop(); | |
1127 return this; | |
1128 } | |
1129 | |
1130 void ForStatement::scopeCode(Scope *sc, Statement **sentry, Statement **sexception, Statement **sfinally) | |
1131 { | |
1132 //printf("ForStatement::scopeCode()\n"); | |
1133 //print(); | |
1134 if (init) | |
1135 init->scopeCode(sc, sentry, sexception, sfinally); | |
1136 else | |
1137 Statement::scopeCode(sc, sentry, sexception, sfinally); | |
1138 } | |
1139 | |
1140 int ForStatement::hasBreak() | |
1141 { | |
1142 //printf("ForStatement::hasBreak()\n"); | |
1143 return TRUE; | |
1144 } | |
1145 | |
1146 int ForStatement::hasContinue() | |
1147 { | |
1148 return TRUE; | |
1149 } | |
1150 | |
1151 int ForStatement::usesEH() | |
1152 { | |
1153 return (init && init->usesEH()) || body->usesEH(); | |
1154 } | |
1155 | |
1156 int ForStatement::blockExit() | |
1157 { int result = BEfallthru; | |
1158 | |
1159 if (init) | |
1160 { result = init->blockExit(); | |
1161 if (!(result & BEfallthru)) | |
1162 return result; | |
1163 } | |
1164 if (condition) | |
1165 { if (condition->canThrow()) | |
1166 result |= BEthrow; | |
1167 } | |
1168 else | |
1169 result &= ~BEfallthru; // the body must do the exiting | |
1170 if (body) | |
1171 { int r = body->blockExit(); | |
1172 if (r & BEbreak) | |
1173 result |= BEfallthru; | |
1174 result |= r & ~(BEbreak | BEcontinue); | |
1175 } | |
1176 if (increment && increment->canThrow()) | |
1177 result |= BEthrow; | |
1178 return result; | |
1179 } | |
1180 | |
1181 int ForStatement::fallOffEnd() | |
1182 { | |
1183 if (body) | |
1184 body->fallOffEnd(); | |
1185 return TRUE; | |
1186 } | |
1187 | |
1188 int ForStatement::comeFrom() | |
1189 { | |
1190 //printf("ForStatement::comeFrom()\n"); | |
1191 if (body) | |
1192 { int result = body->comeFrom(); | |
1193 //printf("result = %d\n", result); | |
1194 return result; | |
1195 } | |
1196 return FALSE; | |
1197 } | |
1198 | |
1199 void ForStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
1200 { | |
1201 buf->writestring("for ("); | |
1202 if (init) | |
1203 { | |
1204 hgs->FLinit.init++; | |
1205 hgs->FLinit.decl = 0; | |
1206 init->toCBuffer(buf, hgs); | |
1207 if (hgs->FLinit.decl > 0) | |
1208 buf->writebyte(';'); | |
1209 hgs->FLinit.decl = 0; | |
1210 hgs->FLinit.init--; | |
1211 } | |
1212 else | |
1213 buf->writebyte(';'); | |
1214 if (condition) | |
1215 { buf->writebyte(' '); | |
1216 condition->toCBuffer(buf, hgs); | |
1217 } | |
1218 buf->writebyte(';'); | |
1219 if (increment) | |
1220 { buf->writebyte(' '); | |
1221 increment->toCBuffer(buf, hgs); | |
1222 } | |
1223 buf->writebyte(')'); | |
1224 buf->writenl(); | |
1225 buf->writebyte('{'); | |
1226 buf->writenl(); | |
1227 body->toCBuffer(buf, hgs); | |
1228 buf->writebyte('}'); | |
1229 buf->writenl(); | |
1230 } | |
1231 | |
1232 /******************************** ForeachStatement ***************************/ | |
1233 | |
1234 ForeachStatement::ForeachStatement(Loc loc, enum TOK op, Arguments *arguments, | |
1235 Expression *aggr, Statement *body) | |
1236 : Statement(loc) | |
1237 { | |
1238 this->op = op; | |
1239 this->arguments = arguments; | |
1240 this->aggr = aggr; | |
1241 this->body = body; | |
1242 this->enclosinghandler = NULL; | |
1243 | |
1244 this->key = NULL; | |
1245 this->value = NULL; | |
1246 | |
1247 this->func = NULL; | |
1248 } | |
1249 | |
1250 Statement *ForeachStatement::syntaxCopy() | |
1251 { | |
1252 Arguments *args = Argument::arraySyntaxCopy(arguments); | |
1253 Expression *exp = aggr->syntaxCopy(); | |
1254 ForeachStatement *s = new ForeachStatement(loc, op, args, exp, | |
1255 body ? body->syntaxCopy() : NULL); | |
1256 return s; | |
1257 } | |
1258 | |
1259 Statement *ForeachStatement::semantic(Scope *sc) | |
1260 { | |
1261 //printf("ForeachStatement::semantic() %p\n", this); | |
1262 ScopeDsymbol *sym; | |
1263 Statement *s = this; | |
1264 int dim = arguments->dim; | |
1265 int i; | |
1266 TypeAArray *taa = NULL; | |
1267 | |
1268 Type *tn = NULL; | |
1269 Type *tnv = NULL; | |
1270 | |
1271 enclosinghandler = sc->tfOfTry; | |
1272 | |
1273 func = sc->func; | |
1274 if (func->fes) | |
1275 func = func->fes->func; | |
1276 | |
1277 aggr = aggr->semantic(sc); | |
1278 aggr = resolveProperties(sc, aggr); | |
1279 aggr = aggr->optimize(WANTvalue); | |
1280 if (!aggr->type) | |
1281 { | |
1282 error("invalid foreach aggregate %s", aggr->toChars()); | |
1283 return this; | |
1284 } | |
1285 | |
1286 inferApplyArgTypes(op, arguments, aggr); | |
1287 | |
1288 /* Check for inference errors | |
1289 */ | |
1290 if (dim != arguments->dim) | |
1291 { | |
1292 //printf("dim = %d, arguments->dim = %d\n", dim, arguments->dim); | |
1293 error("cannot uniquely infer foreach argument types"); | |
1294 return this; | |
1295 } | |
1296 | |
1297 Type *tab = aggr->type->toBasetype(); | |
1298 | |
1299 if (tab->ty == Ttuple) // don't generate new scope for tuple loops | |
1300 { | |
1301 if (dim < 1 || dim > 2) | |
1302 { | |
1303 error("only one (value) or two (key,value) arguments for tuple foreach"); | |
1304 return s; | |
1305 } | |
1306 | |
1307 TypeTuple *tuple = (TypeTuple *)tab; | |
1308 Statements *statements = new Statements(); | |
1309 //printf("aggr: op = %d, %s\n", aggr->op, aggr->toChars()); | |
1310 size_t n; | |
1311 TupleExp *te = NULL; | |
1312 if (aggr->op == TOKtuple) // expression tuple | |
1313 { te = (TupleExp *)aggr; | |
1314 n = te->exps->dim; | |
1315 } | |
1316 else if (aggr->op == TOKtype) // type tuple | |
1317 { | |
1318 n = Argument::dim(tuple->arguments); | |
1319 } | |
1320 else | |
1321 assert(0); | |
1322 for (size_t j = 0; j < n; j++) | |
1323 { size_t k = (op == TOKforeach) ? j : n - 1 - j; | |
1324 Expression *e; | |
1325 Type *t; | |
1326 if (te) | |
1327 e = (Expression *)te->exps->data[k]; | |
1328 else | |
1329 t = Argument::getNth(tuple->arguments, k)->type; | |
1330 Argument *arg = (Argument *)arguments->data[0]; | |
1331 Statements *st = new Statements(); | |
1332 | |
1333 if (dim == 2) | |
1334 { // Declare key | |
1335 if (arg->storageClass & (STCout | STCref | STClazy)) | |
1336 error("no storage class for key %s", arg->ident->toChars()); | |
1337 TY keyty = arg->type->ty; | |
1338 if (global.params.is64bit) | |
1339 { | |
1340 if (keyty != Tint32 && keyty != Tuns32 && keyty != Tint64 && keyty != Tuns64) | |
1341 { | |
1342 error("foreach: key type must be int, uint, long or ulong, not %s", key->type->toChars()); | |
1343 } | |
1344 } | |
1345 else if (keyty != Tint32 && keyty != Tuns32) | |
1346 { | |
1347 error("foreach: key type must be int or uint, not %s", key->type->toChars()); | |
1348 } | |
1349 Initializer *ie = new ExpInitializer(0, new IntegerExp(k)); | |
1350 VarDeclaration *var = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
1351 var->storage_class |= STCmanifest; | |
1352 DeclarationExp *de = new DeclarationExp(loc, var); | |
1353 st->push(new ExpStatement(loc, de)); | |
1354 arg = (Argument *)arguments->data[1]; // value | |
1355 } | |
1356 // Declare value | |
1357 if (arg->storageClass & (STCout | STCref | STClazy)) | |
1358 error("no storage class for value %s", arg->ident->toChars()); | |
1359 Dsymbol *var; | |
1360 if (te) | |
1361 { Type *tb = e->type->toBasetype(); | |
1362 if ((tb->ty == Tfunction || tb->ty == Tsarray) && e->op == TOKvar) | |
1363 { VarExp *ve = (VarExp *)e; | |
1364 var = new AliasDeclaration(loc, arg->ident, ve->var); | |
1365 } | |
1366 else | |
1367 { | |
1368 arg->type = e->type; | |
1369 Initializer *ie = new ExpInitializer(0, e); | |
1370 VarDeclaration *v = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
1371 if (e->isConst()) | |
1372 v->storage_class |= STCconst; | |
1373 var = v; | |
1374 } | |
1375 } | |
1376 else | |
1377 { | |
1378 var = new AliasDeclaration(loc, arg->ident, t); | |
1379 } | |
1380 DeclarationExp *de = new DeclarationExp(loc, var); | |
1381 st->push(new ExpStatement(loc, de)); | |
1382 | |
1383 st->push(body->syntaxCopy()); | |
1384 s = new CompoundStatement(loc, st); | |
1385 s = new ScopeStatement(loc, s); | |
1386 statements->push(s); | |
1387 } | |
1388 | |
1389 s = new UnrolledLoopStatement(loc, statements); | |
1390 s = s->semantic(sc); | |
1391 return s; | |
1392 } | |
1393 | |
1394 for (i = 0; i < dim; i++) | |
1395 { Argument *arg = (Argument *)arguments->data[i]; | |
1396 if (!arg->type) | |
1397 { | |
1398 error("cannot infer type for %s", arg->ident->toChars()); | |
1399 return this; | |
1400 } | |
1401 } | |
1402 | |
1403 sym = new ScopeDsymbol(); | |
1404 sym->parent = sc->scopesym; | |
1405 sc = sc->push(sym); | |
1406 | |
1407 sc->noctor++; | |
1408 | |
1409 switch (tab->ty) | |
1410 { | |
1411 case Tarray: | |
1412 case Tsarray: | |
1413 if (dim < 1 || dim > 2) | |
1414 { | |
1415 error("only one or two arguments for array foreach"); | |
1416 break; | |
1417 } | |
1418 | |
1419 /* Look for special case of parsing char types out of char type | |
1420 * array. | |
1421 */ | |
1422 tn = tab->nextOf()->toBasetype(); | |
1423 if (tn->ty == Tchar || tn->ty == Twchar || tn->ty == Tdchar) | |
1424 { Argument *arg; | |
1425 | |
1426 i = (dim == 1) ? 0 : 1; // index of value | |
1427 arg = (Argument *)arguments->data[i]; | |
1428 arg->type = arg->type->semantic(loc, sc); | |
1429 tnv = arg->type->toBasetype(); | |
1430 if (tnv->ty != tn->ty && | |
1431 (tnv->ty == Tchar || tnv->ty == Twchar || tnv->ty == Tdchar)) | |
1432 { | |
1433 if (arg->storageClass & STCref) | |
1434 error("foreach: value of UTF conversion cannot be ref"); | |
1435 if (dim == 2) | |
1436 { arg = (Argument *)arguments->data[0]; | |
1437 if (arg->storageClass & STCref) | |
1438 error("foreach: key cannot be ref"); | |
1439 } | |
1440 goto Lapply; | |
1441 } | |
1442 } | |
1443 | |
1444 for (i = 0; i < dim; i++) | |
1445 { // Declare args | |
1446 Argument *arg = (Argument *)arguments->data[i]; | |
1447 VarDeclaration *var; | |
1448 | |
1449 var = new VarDeclaration(loc, arg->type, arg->ident, NULL); | |
1450 var->storage_class |= STCforeach; | |
1451 var->storage_class |= arg->storageClass & (STCin | STCout | STCref | STCconst | STCinvariant); | |
1452 if (dim == 2 && i == 0) | |
1453 { key = var; | |
1454 //var->storage_class |= STCfinal; | |
1455 } | |
1456 else | |
1457 { | |
1458 value = var; | |
1459 /* Reference to immutable data should be marked as const | |
1460 */ | |
1461 if (var->storage_class & STCref && !tn->isMutable()) | |
1462 { | |
1463 var->storage_class |= STCconst; | |
1464 } | |
1465 } | |
1466 #if 1 | |
1467 DeclarationExp *de = new DeclarationExp(loc, var); | |
1468 de->semantic(sc); | |
1469 #else | |
1470 var->semantic(sc); | |
1471 if (!sc->insert(var)) | |
1472 error("%s already defined", var->ident->toChars()); | |
1473 #endif | |
1474 } | |
1475 | |
1476 sc->sbreak = this; | |
1477 sc->scontinue = this; | |
1478 body = body->semantic(sc); | |
1479 | |
1480 if (tab->nextOf()->implicitConvTo(value->type) < MATCHconst) | |
1481 { | |
1482 if (aggr->op == TOKstring) | |
1483 aggr = aggr->implicitCastTo(sc, value->type->arrayOf()); | |
1484 else | |
1485 error("foreach: %s is not an array of %s", | |
1486 tab->toChars(), value->type->toChars()); | |
1487 } | |
1488 | |
1489 if (key) | |
1490 { | |
1491 if (global.params.is64bit) | |
1492 { | |
1493 if (key->type->ty != Tint32 && key->type->ty != Tuns32 && key->type->ty != Tint64 && key->type->ty != Tuns64) | |
1494 { | |
1495 error("foreach: key type must be int, uint, long or ulong, not %s", key->type->toChars()); | |
1496 } | |
1497 } | |
1498 else if (key->type->ty != Tint32 && key->type->ty != Tuns32) | |
1499 { | |
1500 error("foreach: key type must be int or uint, not %s", key->type->toChars()); | |
1501 } | |
1502 } | |
1503 | |
1504 if (key && key->storage_class & (STCout | STCref)) | |
1505 error("foreach: key cannot be out or ref"); | |
1506 break; | |
1507 | |
1508 case Taarray: | |
1509 taa = (TypeAArray *)tab; | |
1510 if (dim < 1 || dim > 2) | |
1511 { | |
1512 error("only one or two arguments for associative array foreach"); | |
1513 break; | |
1514 } | |
1515 if (op == TOKforeach_reverse) | |
1516 { | |
1517 error("no reverse iteration on associative arrays"); | |
1518 } | |
1519 goto Lapply; | |
1520 | |
1521 case Tclass: | |
1522 case Tstruct: | |
1523 case Tdelegate: | |
1524 Lapply: | |
1525 { FuncDeclaration *fdapply; | |
1526 Arguments *args; | |
1527 Expression *ec; | |
1528 Expression *e; | |
1529 FuncLiteralDeclaration *fld; | |
1530 Argument *a; | |
1531 Type *t; | |
1532 Expression *flde; | |
1533 Identifier *id; | |
1534 Type *tret; | |
1535 TypeDelegate* dgty; | |
1536 TypeDelegate* dgty2; | |
1537 TypeDelegate* fldeTy; | |
1538 | |
1539 tret = func->type->nextOf(); | |
1540 | |
1541 // Need a variable to hold value from any return statements in body. | |
1542 if (!sc->func->vresult && tret && tret != Type::tvoid) | |
1543 { VarDeclaration *v; | |
1544 | |
1545 v = new VarDeclaration(loc, tret, Id::result, NULL); | |
1546 v->noauto = 1; | |
1547 v->semantic(sc); | |
1548 if (!sc->insert(v)) | |
1549 assert(0); | |
1550 v->parent = sc->func; | |
1551 sc->func->vresult = v; | |
1552 } | |
1553 | |
1554 /* Turn body into the function literal: | |
1555 * int delegate(ref T arg) { body } | |
1556 */ | |
1557 args = new Arguments(); | |
1558 for (i = 0; i < dim; i++) | |
1559 { Argument *arg = (Argument *)arguments->data[i]; | |
1560 | |
1561 arg->type = arg->type->semantic(loc, sc); | |
1562 if (arg->storageClass & STCref) | |
1563 id = arg->ident; | |
1564 else | |
1565 { // Make a copy of the ref argument so it isn't | |
1566 // a reference. | |
1567 VarDeclaration *v; | |
1568 Initializer *ie; | |
1569 | |
1570 id = Lexer::uniqueId("__applyArg", i); | |
1571 | |
1572 ie = new ExpInitializer(0, new IdentifierExp(0, id)); | |
1573 v = new VarDeclaration(0, arg->type, arg->ident, ie); | |
1574 s = new DeclarationStatement(0, v); | |
1575 body = new CompoundStatement(loc, s, body); | |
1576 } | |
1577 a = new Argument(STCref, arg->type, id, NULL); | |
1578 args->push(a); | |
1579 } | |
1580 t = new TypeFunction(args, Type::tint32, 0, LINKd); | |
1581 fld = new FuncLiteralDeclaration(loc, 0, t, TOKdelegate, this); | |
1582 fld->fbody = body; | |
1583 flde = new FuncExp(loc, fld); | |
1584 flde = flde->semantic(sc); | |
1585 fld->tookAddressOf = 0; | |
1586 | |
1587 // Resolve any forward referenced goto's | |
1588 for (int i = 0; i < gotos.dim; i++) | |
1589 { CompoundStatement *cs = (CompoundStatement *)gotos.data[i]; | |
1590 GotoStatement *gs = (GotoStatement *)cs->statements->data[0]; | |
1591 | |
1592 if (!gs->label->statement) | |
1593 { // 'Promote' it to this scope, and replace with a return | |
1594 cases.push(gs); | |
1595 s = new ReturnStatement(0, new IntegerExp(cases.dim + 1)); | |
1596 cs->statements->data[0] = (void *)s; | |
1597 } | |
1598 } | |
1599 | |
1600 if (tab->ty == Taarray) | |
1601 { | |
1602 // Check types | |
1603 Argument *arg = (Argument *)arguments->data[0]; | |
1604 if (dim == 2) | |
1605 { | |
1606 if (arg->storageClass & STCref) | |
1607 error("foreach: index cannot be ref"); | |
1608 if (!arg->type->equals(taa->index)) | |
1609 error("foreach: index must be type %s, not %s", taa->index->toChars(), arg->type->toChars()); | |
1610 arg = (Argument *)arguments->data[1]; | |
1611 } | |
1612 if (!arg->type->equals(taa->nextOf())) | |
1613 error("foreach: value must be type %s, not %s", taa->nextOf()->toChars(), arg->type->toChars()); | |
1614 | |
1615 /* Call: | |
1616 * _aaApply(aggr, keysize, flde) | |
1617 */ | |
1618 //LDC: Build arguments. | |
1619 static FuncDeclaration *aaApply2_fd = NULL; | |
1620 static TypeDelegate* aaApply2_dg; | |
1621 if(!aaApply2_fd) { | |
1622 Arguments* args = new Arguments; | |
1623 args->push(new Argument(STCin, Type::tvoid->pointerTo(), NULL, NULL)); | |
1624 args->push(new Argument(STCin, Type::tsize_t, NULL, NULL)); | |
1625 Arguments* dgargs = new Arguments; | |
1626 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1627 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1628 aaApply2_dg = new TypeDelegate(new TypeFunction(dgargs, Type::tindex, 0, LINKd)); | |
1629 args->push(new Argument(STCin, aaApply2_dg, NULL, NULL)); | |
1630 aaApply2_fd = FuncDeclaration::genCfunc(args, Type::tindex, "_aaApply2"); | |
1631 } | |
1632 static FuncDeclaration *aaApply_fd = NULL; | |
1633 static TypeDelegate* aaApply_dg; | |
1634 if(!aaApply_fd) { | |
1635 Arguments* args = new Arguments; | |
1636 args->push(new Argument(STCin, Type::tvoid->pointerTo(), NULL, NULL)); | |
1637 args->push(new Argument(STCin, Type::tsize_t, NULL, NULL)); | |
1638 Arguments* dgargs = new Arguments; | |
1639 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1640 aaApply_dg = new TypeDelegate(new TypeFunction(dgargs, Type::tindex, 0, LINKd)); | |
1641 args->push(new Argument(STCin, aaApply_dg, NULL, NULL)); | |
1642 aaApply_fd = FuncDeclaration::genCfunc(args, Type::tindex, "_aaApply"); | |
1643 } | |
1644 if (dim == 2) { | |
1645 fdapply = aaApply2_fd; | |
1646 fldeTy = aaApply2_dg; | |
1647 } else { | |
1648 fdapply = aaApply_fd; | |
1649 fldeTy = aaApply_dg; | |
1650 } | |
1651 ec = new VarExp(0, fdapply); | |
1652 Expressions *exps = new Expressions(); | |
1653 exps->push(aggr); | |
1654 size_t keysize = taa->index->size(); | |
1655 keysize = (keysize + 3) & ~3; | |
1656 exps->push(new IntegerExp(0, keysize, Type::tsize_t)); | |
1657 | |
1658 // LDC paint delegate argument to the type runtime expects | |
1659 if (!fldeTy->equals(flde->type)) | |
1660 { | |
1661 flde = new CastExp(loc, flde, flde->type); | |
1662 flde->type = fldeTy; | |
1663 } | |
1664 exps->push(flde); | |
1665 | |
1666 e = new CallExp(loc, ec, exps); | |
1667 e->type = Type::tindex; // don't run semantic() on e | |
1668 } | |
1669 else if (tab->ty == Tarray || tab->ty == Tsarray) | |
1670 { | |
1671 /* Call: | |
1672 * _aApply(aggr, flde) | |
1673 */ | |
1674 static char fntab[9][3] = | |
1675 { "cc","cw","cd", | |
1676 "wc","cc","wd", | |
1677 "dc","dw","dd" | |
1678 }; | |
1679 char fdname[7+1+2+ sizeof(dim)*3 + 1]; | |
1680 int flag; | |
1681 | |
1682 switch (tn->ty) | |
1683 { | |
1684 case Tchar: flag = 0; break; | |
1685 case Twchar: flag = 3; break; | |
1686 case Tdchar: flag = 6; break; | |
1687 default: assert(0); | |
1688 } | |
1689 switch (tnv->ty) | |
1690 { | |
1691 case Tchar: flag += 0; break; | |
1692 case Twchar: flag += 1; break; | |
1693 case Tdchar: flag += 2; break; | |
1694 default: assert(0); | |
1695 } | |
1696 const char *r = (op == TOKforeach_reverse) ? "R" : ""; | |
1697 int j = sprintf(fdname, "_aApply%s%.*s%d", r, 2, fntab[flag], dim); | |
1698 assert(j < sizeof(fdname)); | |
1699 //LDC: Build arguments. | |
1700 Arguments* args = new Arguments; | |
1701 args->push(new Argument(STCin, tn->arrayOf(), NULL, NULL)); | |
1702 if (dim == 2) { | |
1703 Arguments* dgargs = new Arguments; | |
1704 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1705 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1706 dgty = new TypeDelegate(new TypeFunction(dgargs, Type::tindex, 0, LINKd)); | |
1707 args->push(new Argument(STCin, dgty, NULL, NULL)); | |
1708 fdapply = FuncDeclaration::genCfunc(args, Type::tindex, fdname); | |
1709 } else { | |
1710 Arguments* dgargs = new Arguments; | |
1711 dgargs->push(new Argument(STCin, Type::tvoidptr, NULL, NULL)); | |
1712 dgty = new TypeDelegate(new TypeFunction(dgargs, Type::tindex, 0, LINKd)); | |
1713 args->push(new Argument(STCin, dgty, NULL, NULL)); | |
1714 fdapply = FuncDeclaration::genCfunc(args, Type::tindex, fdname); | |
1715 } | |
1716 | |
1717 ec = new VarExp(0, fdapply); | |
1718 Expressions *exps = new Expressions(); | |
1719 if (tab->ty == Tsarray) | |
1720 aggr = aggr->castTo(sc, tn->arrayOf()); | |
1721 exps->push(aggr); | |
1722 | |
1723 // LDC paint delegate argument to the type runtime expects | |
1724 if (!dgty->equals(flde->type)) | |
1725 { | |
1726 flde = new CastExp(loc, flde, flde->type); | |
1727 flde->type = dgty; | |
1728 } | |
1729 exps->push(flde); | |
1730 | |
1731 e = new CallExp(loc, ec, exps); | |
1732 e->type = Type::tindex; // don't run semantic() on e | |
1733 } | |
1734 else if (tab->ty == Tdelegate) | |
1735 { | |
1736 /* Call: | |
1737 * aggr(flde) | |
1738 */ | |
1739 Expressions *exps = new Expressions(); | |
1740 exps->push(flde); | |
1741 e = new CallExp(loc, aggr, exps); | |
1742 e = e->semantic(sc); | |
1743 if (e->type != Type::tint32) | |
1744 error("opApply() function for %s must return an int", tab->toChars()); | |
1745 } | |
1746 else | |
1747 { | |
1748 assert(tab->ty == Tstruct || tab->ty == Tclass); | |
1749 Identifier *idapply = (op == TOKforeach_reverse) | |
1750 ? Id::applyReverse : Id::apply; | |
1751 Dsymbol *sapply = search_function((AggregateDeclaration *)tab->toDsymbol(sc), idapply); | |
1752 Expressions *exps = new Expressions(); | |
1753 #if 0 | |
1754 TemplateDeclaration *td; | |
1755 if (sapply && | |
1756 (td = sapply->isTemplateDeclaration()) != NULL) | |
1757 { /* Call: | |
1758 * aggr.apply!(fld)() | |
1759 */ | |
1760 TemplateInstance *ti = new TemplateInstance(loc, idapply); | |
1761 Objects *tiargs = new Objects(); | |
1762 tiargs->push(fld); | |
1763 ti->tiargs = tiargs; | |
1764 ec = new DotTemplateInstanceExp(loc, aggr, ti); | |
1765 } | |
1766 else | |
1767 #endif | |
1768 { | |
1769 /* Call: | |
1770 * aggr.apply(flde) | |
1771 */ | |
1772 ec = new DotIdExp(loc, aggr, idapply); | |
1773 exps->push(flde); | |
1774 } | |
1775 e = new CallExp(loc, ec, exps); | |
1776 e = e->semantic(sc); | |
1777 if (e->type != Type::tint32) | |
1778 error("opApply() function for %s must return an int", tab->toChars()); | |
1779 } | |
1780 | |
1781 if (!cases.dim) | |
1782 // Easy case, a clean exit from the loop | |
1783 s = new ExpStatement(loc, e); | |
1784 else | |
1785 { // Construct a switch statement around the return value | |
1786 // of the apply function. | |
1787 Statements *a = new Statements(); | |
1788 | |
1789 // default: break; takes care of cases 0 and 1 | |
1790 s = new BreakStatement(0, NULL); | |
1791 s = new DefaultStatement(0, s); | |
1792 a->push(s); | |
1793 | |
1794 // cases 2... | |
1795 for (int i = 0; i < cases.dim; i++) | |
1796 { | |
1797 s = (Statement *)cases.data[i]; | |
1798 s = new CaseStatement(0, new IntegerExp(i + 2), s); | |
1799 a->push(s); | |
1800 } | |
1801 | |
1802 s = new CompoundStatement(loc, a); | |
1803 s = new SwitchStatement(loc, e, s); | |
1804 s = s->semantic(sc); | |
1805 } | |
1806 break; | |
1807 } | |
1808 | |
1809 default: | |
1810 error("foreach: %s is not an aggregate type", aggr->type->toChars()); | |
1811 break; | |
1812 } | |
1813 sc->noctor--; | |
1814 sc->pop(); | |
1815 return s; | |
1816 } | |
1817 | |
1818 int ForeachStatement::hasBreak() | |
1819 { | |
1820 return TRUE; | |
1821 } | |
1822 | |
1823 int ForeachStatement::hasContinue() | |
1824 { | |
1825 return TRUE; | |
1826 } | |
1827 | |
1828 int ForeachStatement::usesEH() | |
1829 { | |
1830 return body->usesEH(); | |
1831 } | |
1832 | |
1833 int ForeachStatement::blockExit() | |
1834 { int result = BEfallthru; | |
1835 | |
1836 if (aggr->canThrow()) | |
1837 result |= BEthrow; | |
1838 | |
1839 if (body) | |
1840 { | |
1841 result |= body->blockExit() & ~(BEbreak | BEcontinue); | |
1842 } | |
1843 return result; | |
1844 } | |
1845 | |
1846 int ForeachStatement::fallOffEnd() | |
1847 { | |
1848 if (body) | |
1849 body->fallOffEnd(); | |
1850 return TRUE; | |
1851 } | |
1852 | |
1853 int ForeachStatement::comeFrom() | |
1854 { | |
1855 if (body) | |
1856 return body->comeFrom(); | |
1857 return FALSE; | |
1858 } | |
1859 | |
1860 void ForeachStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
1861 { | |
1862 buf->writestring(Token::toChars(op)); | |
1863 buf->writestring(" ("); | |
1864 for (int i = 0; i < arguments->dim; i++) | |
1865 { | |
1866 Argument *a = (Argument *)arguments->data[i]; | |
1867 if (i) | |
1868 buf->writestring(", "); | |
1869 if (a->storageClass & STCref) | |
1870 buf->writestring((global.params.Dversion == 1) | |
1871 ? (char*)"inout " : (char*)"ref "); | |
1872 if (a->type) | |
1873 a->type->toCBuffer(buf, a->ident, hgs); | |
1874 else | |
1875 buf->writestring(a->ident->toChars()); | |
1876 } | |
1877 buf->writestring("; "); | |
1878 aggr->toCBuffer(buf, hgs); | |
1879 buf->writebyte(')'); | |
1880 buf->writenl(); | |
1881 buf->writebyte('{'); | |
1882 buf->writenl(); | |
1883 if (body) | |
1884 body->toCBuffer(buf, hgs); | |
1885 buf->writebyte('}'); | |
1886 buf->writenl(); | |
1887 } | |
1888 | |
1889 /**************************** ForeachRangeStatement ***************************/ | |
1890 | |
1891 ForeachRangeStatement::ForeachRangeStatement(Loc loc, enum TOK op, Argument *arg, | |
1892 Expression *lwr, Expression *upr, Statement *body) | |
1893 : Statement(loc) | |
1894 { | |
1895 this->op = op; | |
1896 this->arg = arg; | |
1897 this->lwr = lwr; | |
1898 this->upr = upr; | |
1899 this->body = body; | |
1900 | |
1901 this->enclosinghandler = NULL; | |
1902 | |
1903 this->key = NULL; | |
1904 } | |
1905 | |
1906 Statement *ForeachRangeStatement::syntaxCopy() | |
1907 { | |
1908 ForeachRangeStatement *s = new ForeachRangeStatement(loc, op, | |
1909 arg->syntaxCopy(), | |
1910 lwr->syntaxCopy(), | |
1911 upr->syntaxCopy(), | |
1912 body ? body->syntaxCopy() : NULL); | |
1913 return s; | |
1914 } | |
1915 | |
1916 Statement *ForeachRangeStatement::semantic(Scope *sc) | |
1917 { | |
1918 //printf("ForeachRangeStatement::semantic() %p\n", this); | |
1919 ScopeDsymbol *sym; | |
1920 Statement *s = this; | |
1921 | |
1922 enclosinghandler = sc->tfOfTry; | |
1923 | |
1924 lwr = lwr->semantic(sc); | |
1925 lwr = resolveProperties(sc, lwr); | |
1926 lwr = lwr->optimize(WANTvalue); | |
1927 if (!lwr->type) | |
1928 { | |
1929 error("invalid range lower bound %s", lwr->toChars()); | |
1930 return this; | |
1931 } | |
1932 | |
1933 upr = upr->semantic(sc); | |
1934 upr = resolveProperties(sc, upr); | |
1935 upr = upr->optimize(WANTvalue); | |
1936 if (!upr->type) | |
1937 { | |
1938 error("invalid range upper bound %s", upr->toChars()); | |
1939 return this; | |
1940 } | |
1941 | |
1942 if (arg->type) | |
1943 { | |
1944 lwr = lwr->implicitCastTo(sc, arg->type); | |
1945 upr = upr->implicitCastTo(sc, arg->type); | |
1946 } | |
1947 else | |
1948 { | |
1949 /* Must infer types from lwr and upr | |
1950 */ | |
1951 AddExp ea(loc, lwr, upr); | |
1952 ea.typeCombine(sc); | |
1953 arg->type = ea.type->mutableOf(); | |
1954 lwr = ea.e1; | |
1955 upr = ea.e2; | |
1956 } | |
1957 if (!arg->type->isscalar()) | |
1958 error("%s is not a scalar type", arg->type->toChars()); | |
1959 | |
1960 sym = new ScopeDsymbol(); | |
1961 sym->parent = sc->scopesym; | |
1962 sc = sc->push(sym); | |
1963 | |
1964 sc->noctor++; | |
1965 | |
1966 key = new VarDeclaration(loc, arg->type, arg->ident, NULL); | |
1967 DeclarationExp *de = new DeclarationExp(loc, key); | |
1968 de->semantic(sc); | |
1969 | |
1970 if (key->storage_class) | |
1971 error("foreach range: key cannot have storage class"); | |
1972 | |
1973 sc->sbreak = this; | |
1974 sc->scontinue = this; | |
1975 body = body->semantic(sc); | |
1976 | |
1977 sc->noctor--; | |
1978 sc->pop(); | |
1979 return s; | |
1980 } | |
1981 | |
1982 int ForeachRangeStatement::hasBreak() | |
1983 { | |
1984 return TRUE; | |
1985 } | |
1986 | |
1987 int ForeachRangeStatement::hasContinue() | |
1988 { | |
1989 return TRUE; | |
1990 } | |
1991 | |
1992 int ForeachRangeStatement::usesEH() | |
1993 { | |
1994 return body->usesEH(); | |
1995 } | |
1996 | |
1997 int ForeachRangeStatement::blockExit() | |
1998 { int result = BEfallthru; | |
1999 | |
2000 if (lwr && lwr->canThrow()) | |
2001 result |= BEthrow; | |
2002 else if (upr && upr->canThrow()) | |
2003 result |= BEthrow; | |
2004 | |
2005 if (body) | |
2006 { | |
2007 result |= body->blockExit() & ~(BEbreak | BEcontinue); | |
2008 } | |
2009 return result; | |
2010 } | |
2011 | |
2012 int ForeachRangeStatement::fallOffEnd() | |
2013 { | |
2014 if (body) | |
2015 body->fallOffEnd(); | |
2016 return TRUE; | |
2017 } | |
2018 | |
2019 int ForeachRangeStatement::comeFrom() | |
2020 { | |
2021 if (body) | |
2022 return body->comeFrom(); | |
2023 return FALSE; | |
2024 } | |
2025 | |
2026 void ForeachRangeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2027 { | |
2028 buf->writestring(Token::toChars(op)); | |
2029 buf->writestring(" ("); | |
2030 | |
2031 if (arg->type) | |
2032 arg->type->toCBuffer(buf, arg->ident, hgs); | |
2033 else | |
2034 buf->writestring(arg->ident->toChars()); | |
2035 | |
2036 buf->writestring("; "); | |
2037 lwr->toCBuffer(buf, hgs); | |
2038 buf->writestring(" .. "); | |
2039 upr->toCBuffer(buf, hgs); | |
2040 buf->writebyte(')'); | |
2041 buf->writenl(); | |
2042 buf->writebyte('{'); | |
2043 buf->writenl(); | |
2044 if (body) | |
2045 body->toCBuffer(buf, hgs); | |
2046 buf->writebyte('}'); | |
2047 buf->writenl(); | |
2048 } | |
2049 | |
2050 /******************************** IfStatement ***************************/ | |
2051 | |
2052 IfStatement::IfStatement(Loc loc, Argument *arg, Expression *condition, Statement *ifbody, Statement *elsebody) | |
2053 : Statement(loc) | |
2054 { | |
2055 this->arg = arg; | |
2056 this->condition = condition; | |
2057 this->ifbody = ifbody; | |
2058 this->elsebody = elsebody; | |
2059 this->match = NULL; | |
2060 } | |
2061 | |
2062 Statement *IfStatement::syntaxCopy() | |
2063 { | |
2064 Statement *i = NULL; | |
2065 if (ifbody) | |
2066 i = ifbody->syntaxCopy(); | |
2067 | |
2068 Statement *e = NULL; | |
2069 if (elsebody) | |
2070 e = elsebody->syntaxCopy(); | |
2071 | |
2072 Argument *a = arg ? arg->syntaxCopy() : NULL; | |
2073 IfStatement *s = new IfStatement(loc, a, condition->syntaxCopy(), i, e); | |
2074 return s; | |
2075 } | |
2076 | |
2077 Statement *IfStatement::semantic(Scope *sc) | |
2078 { | |
2079 condition = condition->semantic(sc); | |
2080 condition = resolveProperties(sc, condition); | |
2081 condition = condition->checkToBoolean(); | |
2082 | |
2083 // If we can short-circuit evaluate the if statement, don't do the | |
2084 // semantic analysis of the skipped code. | |
2085 // This feature allows a limited form of conditional compilation. | |
2086 condition = condition->optimize(WANTflags); | |
2087 | |
2088 // Evaluate at runtime | |
2089 unsigned cs0 = sc->callSuper; | |
2090 unsigned cs1; | |
2091 | |
2092 Scope *scd; | |
2093 if (arg) | |
2094 { /* Declare arg, which we will set to be the | |
2095 * result of condition. | |
2096 */ | |
2097 ScopeDsymbol *sym = new ScopeDsymbol(); | |
2098 sym->parent = sc->scopesym; | |
2099 scd = sc->push(sym); | |
2100 | |
2101 Type *t = arg->type ? arg->type : condition->type; | |
2102 match = new VarDeclaration(loc, t, arg->ident, NULL); | |
2103 match->noauto = 1; | |
2104 match->semantic(scd); | |
2105 if (!scd->insert(match)) | |
2106 assert(0); | |
2107 match->parent = sc->func; | |
2108 | |
2109 /* Generate: | |
2110 * (arg = condition) | |
2111 */ | |
2112 VarExp *v = new VarExp(0, match); | |
2113 condition = new AssignExp(loc, v, condition); | |
2114 condition = condition->semantic(scd); | |
2115 } | |
2116 else | |
2117 scd = sc->push(); | |
2118 ifbody = ifbody->semantic(scd); | |
2119 scd->pop(); | |
2120 | |
2121 cs1 = sc->callSuper; | |
2122 sc->callSuper = cs0; | |
2123 if (elsebody) | |
2124 elsebody = elsebody->semanticScope(sc, NULL, NULL); | |
2125 sc->mergeCallSuper(loc, cs1); | |
2126 | |
2127 return this; | |
2128 } | |
2129 | |
2130 int IfStatement::usesEH() | |
2131 { | |
2132 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
2133 } | |
2134 | |
2135 int IfStatement::blockExit() | |
2136 { | |
2137 //printf("IfStatement::blockExit(%p)\n", this); | |
2138 | |
2139 int result = BEnone; | |
2140 if (condition->canThrow()) | |
2141 result |= BEthrow; | |
2142 if (condition->isBool(TRUE)) | |
2143 { | |
2144 if (ifbody) | |
2145 result |= ifbody->blockExit(); | |
2146 else | |
2147 result |= BEfallthru; | |
2148 } | |
2149 else if (condition->isBool(FALSE)) | |
2150 { | |
2151 if (elsebody) | |
2152 result |= elsebody->blockExit(); | |
2153 else | |
2154 result |= BEfallthru; | |
2155 } | |
2156 else | |
2157 { | |
2158 if (ifbody) | |
2159 result |= ifbody->blockExit(); | |
2160 else | |
2161 result |= BEfallthru; | |
2162 if (elsebody) | |
2163 result |= elsebody->blockExit(); | |
2164 else | |
2165 result |= BEfallthru; | |
2166 } | |
2167 //printf("IfStatement::blockExit(%p) = x%x\n", this, result); | |
2168 return result; | |
2169 } | |
2170 | |
2171 int IfStatement::fallOffEnd() | |
2172 { | |
2173 if (!ifbody || ifbody->fallOffEnd() || | |
2174 !elsebody || elsebody->fallOffEnd()) | |
2175 return TRUE; | |
2176 return FALSE; | |
2177 } | |
2178 | |
2179 | |
2180 void IfStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2181 { | |
2182 buf->writestring("if ("); | |
2183 if (arg) | |
2184 { | |
2185 if (arg->type) | |
2186 arg->type->toCBuffer(buf, arg->ident, hgs); | |
2187 else | |
2188 { buf->writestring("auto "); | |
2189 buf->writestring(arg->ident->toChars()); | |
2190 } | |
2191 buf->writestring(" = "); | |
2192 } | |
2193 condition->toCBuffer(buf, hgs); | |
2194 buf->writebyte(')'); | |
2195 buf->writenl(); | |
2196 ifbody->toCBuffer(buf, hgs); | |
2197 if (elsebody) | |
2198 { buf->writestring("else"); | |
2199 buf->writenl(); | |
2200 elsebody->toCBuffer(buf, hgs); | |
2201 } | |
2202 } | |
2203 | |
2204 /******************************** ConditionalStatement ***************************/ | |
2205 | |
2206 ConditionalStatement::ConditionalStatement(Loc loc, Condition *condition, Statement *ifbody, Statement *elsebody) | |
2207 : Statement(loc) | |
2208 { | |
2209 this->condition = condition; | |
2210 this->ifbody = ifbody; | |
2211 this->elsebody = elsebody; | |
2212 } | |
2213 | |
2214 Statement *ConditionalStatement::syntaxCopy() | |
2215 { | |
2216 Statement *e = NULL; | |
2217 if (elsebody) | |
2218 e = elsebody->syntaxCopy(); | |
2219 ConditionalStatement *s = new ConditionalStatement(loc, | |
2220 condition->syntaxCopy(), ifbody->syntaxCopy(), e); | |
2221 return s; | |
2222 } | |
2223 | |
2224 Statement *ConditionalStatement::semantic(Scope *sc) | |
2225 { | |
2226 //printf("ConditionalStatement::semantic()\n"); | |
2227 | |
2228 // If we can short-circuit evaluate the if statement, don't do the | |
2229 // semantic analysis of the skipped code. | |
2230 // This feature allows a limited form of conditional compilation. | |
2231 if (condition->include(sc, NULL)) | |
2232 { | |
2233 ifbody = ifbody->semantic(sc); | |
2234 return ifbody; | |
2235 } | |
2236 else | |
2237 { | |
2238 if (elsebody) | |
2239 elsebody = elsebody->semantic(sc); | |
2240 return elsebody; | |
2241 } | |
2242 } | |
2243 | |
2244 Statements *ConditionalStatement::flatten(Scope *sc) | |
2245 { | |
2246 Statement *s; | |
2247 | |
2248 if (condition->include(sc, NULL)) | |
2249 s = ifbody; | |
2250 else | |
2251 s = elsebody; | |
2252 | |
2253 Statements *a = new Statements(); | |
2254 a->push(s); | |
2255 return a; | |
2256 } | |
2257 | |
2258 int ConditionalStatement::usesEH() | |
2259 { | |
2260 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
2261 } | |
2262 | |
2263 int ConditionalStatement::blockExit() | |
2264 { | |
2265 int result = ifbody->blockExit(); | |
2266 if (elsebody) | |
2267 result |= elsebody->blockExit(); | |
2268 return result; | |
2269 } | |
2270 | |
2271 void ConditionalStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2272 { | |
2273 condition->toCBuffer(buf, hgs); | |
2274 buf->writenl(); | |
2275 buf->writeByte('{'); | |
2276 buf->writenl(); | |
2277 if (ifbody) | |
2278 ifbody->toCBuffer(buf, hgs); | |
2279 buf->writeByte('}'); | |
2280 buf->writenl(); | |
2281 if (elsebody) | |
2282 { | |
2283 buf->writestring("else"); | |
2284 buf->writenl(); | |
2285 buf->writeByte('{'); | |
2286 buf->writenl(); | |
2287 elsebody->toCBuffer(buf, hgs); | |
2288 buf->writeByte('}'); | |
2289 buf->writenl(); | |
2290 } | |
2291 buf->writenl(); | |
2292 } | |
2293 | |
2294 | |
2295 /******************************** PragmaStatement ***************************/ | |
2296 | |
2297 PragmaStatement::PragmaStatement(Loc loc, Identifier *ident, Expressions *args, Statement *body) | |
2298 : Statement(loc) | |
2299 { | |
2300 this->ident = ident; | |
2301 this->args = args; | |
2302 this->body = body; | |
2303 } | |
2304 | |
2305 Statement *PragmaStatement::syntaxCopy() | |
2306 { | |
2307 Statement *b = NULL; | |
2308 if (body) | |
2309 b = body->syntaxCopy(); | |
2310 PragmaStatement *s = new PragmaStatement(loc, | |
2311 ident, Expression::arraySyntaxCopy(args), b); | |
2312 return s; | |
2313 } | |
2314 | |
2315 Statement *PragmaStatement::semantic(Scope *sc) | |
2316 { // Should be merged with PragmaDeclaration | |
2317 //printf("PragmaStatement::semantic() %s\n", toChars()); | |
2318 //printf("body = %p\n", body); | |
2319 if (ident == Id::msg) | |
2320 { | |
2321 if (args) | |
2322 { | |
2323 for (size_t i = 0; i < args->dim; i++) | |
2324 { | |
2325 Expression *e = (Expression *)args->data[i]; | |
2326 | |
2327 e = e->semantic(sc); | |
2328 e = e->optimize(WANTvalue | WANTinterpret); | |
2329 if (e->op == TOKstring) | |
2330 { | |
2331 StringExp *se = (StringExp *)e; | |
2332 fprintf(stdmsg, "%.*s", (int)se->len, se->string); | |
2333 } | |
2334 else | |
2335 error("string expected for message, not '%s'", e->toChars()); | |
2336 } | |
2337 fprintf(stdmsg, "\n"); | |
2338 } | |
2339 } | |
2340 else if (ident == Id::lib) | |
2341 { | |
2342 if (!args || args->dim != 1) | |
2343 error("string expected for library name"); | |
2344 else | |
2345 { | |
2346 Expression *e = (Expression *)args->data[0]; | |
2347 | |
2348 e = e->semantic(sc); | |
2349 e = e->optimize(WANTvalue | WANTinterpret); | |
2350 args->data[0] = (void *)e; | |
2351 if (e->op != TOKstring) | |
2352 error("string expected for library name, not '%s'", e->toChars()); | |
2353 else if (global.params.verbose) | |
2354 { | |
2355 StringExp *se = (StringExp *)e; | |
2356 char *name = (char *)mem.malloc(se->len + 1); | |
2357 memcpy(name, se->string, se->len); | |
2358 name[se->len] = 0; | |
2359 printf("library %s\n", name); | |
2360 mem.free(name); | |
2361 } | |
2362 } | |
2363 } | |
2364 else if (ident == Id::startaddress) | |
2365 { | |
2366 if (!args || args->dim != 1) | |
2367 error("function name expected for start address"); | |
2368 else | |
2369 { | |
2370 Expression *e = (Expression *)args->data[0]; | |
2371 e = e->semantic(sc); | |
2372 e = e->optimize(WANTvalue | WANTinterpret); | |
2373 args->data[0] = (void *)e; | |
2374 Dsymbol *sa = getDsymbol(e); | |
2375 if (!sa || !sa->isFuncDeclaration()) | |
2376 error("function name expected for start address, not '%s'", e->toChars()); | |
2377 if (body) | |
2378 { | |
2379 body = body->semantic(sc); | |
2380 } | |
2381 return this; | |
2382 } | |
2383 } | |
2384 else | |
2385 error("unrecognized pragma(%s)", ident->toChars()); | |
2386 | |
2387 if (body) | |
2388 { | |
2389 body = body->semantic(sc); | |
2390 } | |
2391 return body; | |
2392 } | |
2393 | |
2394 int PragmaStatement::usesEH() | |
2395 { | |
2396 return body && body->usesEH(); | |
2397 } | |
2398 | |
2399 int PragmaStatement::blockExit() | |
2400 { | |
2401 int result = BEfallthru; | |
2402 #if 0 // currently, no code is generated for Pragma's, so it's just fallthru | |
2403 if (arrayExpressionCanThrow(args)) | |
2404 result |= BEthrow; | |
2405 if (body) | |
2406 result |= body->blockExit(); | |
2407 #endif | |
2408 return result; | |
2409 } | |
2410 | |
2411 int PragmaStatement::fallOffEnd() | |
2412 { | |
2413 if (body) | |
2414 return body->fallOffEnd(); | |
2415 return TRUE; | |
2416 } | |
2417 | |
2418 void PragmaStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2419 { | |
2420 buf->writestring("pragma ("); | |
2421 buf->writestring(ident->toChars()); | |
2422 if (args && args->dim) | |
2423 { | |
2424 buf->writestring(", "); | |
2425 argsToCBuffer(buf, args, hgs); | |
2426 } | |
2427 buf->writeByte(')'); | |
2428 if (body) | |
2429 { | |
2430 buf->writenl(); | |
2431 buf->writeByte('{'); | |
2432 buf->writenl(); | |
2433 | |
2434 body->toCBuffer(buf, hgs); | |
2435 | |
2436 buf->writeByte('}'); | |
2437 buf->writenl(); | |
2438 } | |
2439 else | |
2440 { | |
2441 buf->writeByte(';'); | |
2442 buf->writenl(); | |
2443 } | |
2444 } | |
2445 | |
2446 | |
2447 /******************************** StaticAssertStatement ***************************/ | |
2448 | |
2449 StaticAssertStatement::StaticAssertStatement(StaticAssert *sa) | |
2450 : Statement(sa->loc) | |
2451 { | |
2452 this->sa = sa; | |
2453 } | |
2454 | |
2455 Statement *StaticAssertStatement::syntaxCopy() | |
2456 { | |
2457 StaticAssertStatement *s = new StaticAssertStatement((StaticAssert *)sa->syntaxCopy(NULL)); | |
2458 return s; | |
2459 } | |
2460 | |
2461 Statement *StaticAssertStatement::semantic(Scope *sc) | |
2462 { | |
2463 sa->semantic2(sc); | |
2464 return NULL; | |
2465 } | |
2466 | |
2467 void StaticAssertStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2468 { | |
2469 sa->toCBuffer(buf, hgs); | |
2470 } | |
2471 | |
2472 | |
2473 /******************************** SwitchStatement ***************************/ | |
2474 | |
2475 SwitchStatement::SwitchStatement(Loc loc, Expression *c, Statement *b) | |
2476 : Statement(loc) | |
2477 { | |
2478 condition = c; | |
2479 body = b; | |
2480 sdefault = NULL; | |
2481 tf = NULL; | |
2482 cases = NULL; | |
2483 hasNoDefault = 0; | |
2484 hasVars = 0; | |
2485 // LDC | |
2486 enclosinghandler = NULL; | |
2487 } | |
2488 | |
2489 Statement *SwitchStatement::syntaxCopy() | |
2490 { | |
2491 SwitchStatement *s = new SwitchStatement(loc, | |
2492 condition->syntaxCopy(), body->syntaxCopy()); | |
2493 return s; | |
2494 } | |
2495 | |
2496 Statement *SwitchStatement::semantic(Scope *sc) | |
2497 { | |
2498 //printf("SwitchStatement::semantic(%p)\n", this); | |
2499 tf = sc->tf; | |
2500 assert(!cases); // ensure semantic() is only run once | |
2501 | |
2502 enclosinghandler = sc->tfOfTry; | |
2503 | |
2504 condition = condition->semantic(sc); | |
2505 condition = resolveProperties(sc, condition); | |
2506 if (condition->type->isString()) | |
2507 { | |
2508 // If it's not an array, cast it to one | |
2509 if (condition->type->ty != Tarray) | |
2510 { | |
2511 condition = condition->implicitCastTo(sc, condition->type->nextOf()->arrayOf()); | |
2512 } | |
2513 condition->type = condition->type->constOf(); | |
2514 } | |
2515 else | |
2516 { condition = condition->integralPromotions(sc); | |
2517 condition->checkIntegral(); | |
2518 } | |
2519 condition = condition->optimize(WANTvalue); | |
2520 | |
2521 sc = sc->push(); | |
2522 sc->sbreak = this; | |
2523 sc->sw = this; | |
2524 | |
2525 cases = new Array(); | |
2526 sc->noctor++; // BUG: should use Scope::mergeCallSuper() for each case instead | |
2527 body = body->semantic(sc); | |
2528 sc->noctor--; | |
2529 | |
2530 // Resolve any goto case's with exp | |
2531 for (int i = 0; i < gotoCases.dim; i++) | |
2532 { | |
2533 GotoCaseStatement *gcs = (GotoCaseStatement *)gotoCases.data[i]; | |
2534 | |
2535 if (!gcs->exp) | |
2536 { | |
2537 gcs->error("no case statement following goto case;"); | |
2538 break; | |
2539 } | |
2540 | |
2541 for (Scope *scx = sc; scx; scx = scx->enclosing) | |
2542 { | |
2543 if (!scx->sw) | |
2544 continue; | |
2545 for (int j = 0; j < scx->sw->cases->dim; j++) | |
2546 { | |
2547 CaseStatement *cs = (CaseStatement *)scx->sw->cases->data[j]; | |
2548 | |
2549 if (cs->exp->equals(gcs->exp)) | |
2550 { | |
2551 gcs->cs = cs; | |
2552 goto Lfoundcase; | |
2553 } | |
2554 } | |
2555 } | |
2556 gcs->error("case %s not found", gcs->exp->toChars()); | |
2557 | |
2558 Lfoundcase: | |
2559 ; | |
2560 } | |
2561 | |
2562 if (!sc->sw->sdefault) | |
2563 { hasNoDefault = 1; | |
2564 | |
2565 if (global.params.warnings) | |
2566 { warning("%s: switch statement has no default", loc.toChars()); | |
2567 } | |
2568 | |
2569 // Generate runtime error if the default is hit | |
2570 Statements *a = new Statements(); | |
2571 CompoundStatement *cs; | |
2572 Statement *s; | |
2573 | |
2574 if (global.params.useSwitchError) | |
2575 s = new SwitchErrorStatement(loc); | |
2576 else | |
2577 { Expression *e = new HaltExp(loc); | |
2578 s = new ExpStatement(loc, e); | |
2579 } | |
2580 | |
2581 a->reserve(4); | |
2582 a->push(body); | |
2583 a->push(new BreakStatement(loc, NULL)); | |
2584 sc->sw->sdefault = new DefaultStatement(loc, s); | |
2585 a->push(sc->sw->sdefault); | |
2586 cs = new CompoundStatement(loc, a); | |
2587 body = cs; | |
2588 } | |
2589 | |
2590 sc->pop(); | |
2591 return this; | |
2592 } | |
2593 | |
2594 int SwitchStatement::hasBreak() | |
2595 { | |
2596 return TRUE; | |
2597 } | |
2598 | |
2599 int SwitchStatement::usesEH() | |
2600 { | |
2601 return body ? body->usesEH() : 0; | |
2602 } | |
2603 | |
2604 int SwitchStatement::blockExit() | |
2605 { int result = BEnone; | |
2606 if (condition->canThrow()) | |
2607 result |= BEthrow; | |
2608 | |
2609 if (body) | |
2610 { result |= body->blockExit(); | |
2611 if (result & BEbreak) | |
2612 { result |= BEfallthru; | |
2613 result &= ~BEbreak; | |
2614 } | |
2615 } | |
2616 else | |
2617 result |= BEfallthru; | |
2618 | |
2619 return result; | |
2620 } | |
2621 | |
2622 int SwitchStatement::fallOffEnd() | |
2623 { | |
2624 if (body) | |
2625 body->fallOffEnd(); | |
2626 return TRUE; // need to do this better | |
2627 } | |
2628 | |
2629 void SwitchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2630 { | |
2631 buf->writestring("switch ("); | |
2632 condition->toCBuffer(buf, hgs); | |
2633 buf->writebyte(')'); | |
2634 buf->writenl(); | |
2635 if (body) | |
2636 { | |
2637 if (!body->isScopeStatement()) | |
2638 { buf->writebyte('{'); | |
2639 buf->writenl(); | |
2640 body->toCBuffer(buf, hgs); | |
2641 buf->writebyte('}'); | |
2642 buf->writenl(); | |
2643 } | |
2644 else | |
2645 { | |
2646 body->toCBuffer(buf, hgs); | |
2647 } | |
2648 } | |
2649 } | |
2650 | |
2651 /******************************** CaseStatement ***************************/ | |
2652 | |
2653 CaseStatement::CaseStatement(Loc loc, Expression *exp, Statement *s) | |
2654 : Statement(loc) | |
2655 { | |
2656 this->exp = exp; | |
2657 this->statement = s; | |
2658 index = 0; | |
2659 cblock = NULL; | |
2660 bodyBB = NULL; | |
2661 llvmIdx = NULL; | |
2662 } | |
2663 | |
2664 Statement *CaseStatement::syntaxCopy() | |
2665 { | |
2666 CaseStatement *s = new CaseStatement(loc, exp->syntaxCopy(), statement->syntaxCopy()); | |
2667 return s; | |
2668 } | |
2669 | |
2670 Statement *CaseStatement::semantic(Scope *sc) | |
2671 { SwitchStatement *sw = sc->sw; | |
2672 | |
2673 //printf("CaseStatement::semantic() %s\n", toChars()); | |
2674 exp = exp->semantic(sc); | |
2675 if (sw) | |
2676 { | |
2677 exp = exp->implicitCastTo(sc, sw->condition->type); | |
2678 exp = exp->optimize(WANTvalue | WANTinterpret); | |
2679 | |
2680 /* This is where variables are allowed as case expressions. | |
2681 */ | |
2682 if (exp->op == TOKvar) | |
2683 { VarExp *ve = (VarExp *)exp; | |
2684 VarDeclaration *v = ve->var->isVarDeclaration(); | |
2685 Type *t = exp->type->toBasetype(); | |
2686 if (v && (t->isintegral() || t->ty == Tclass)) | |
2687 { /* Flag that we need to do special code generation | |
2688 * for this, i.e. generate a sequence of if-then-else | |
2689 */ | |
2690 sw->hasVars = 1; | |
2691 goto L1; | |
2692 } | |
2693 } | |
2694 | |
2695 if (exp->op != TOKstring && exp->op != TOKint64) | |
2696 { | |
2697 error("case must be a string or an integral constant, not %s", exp->toChars()); | |
2698 exp = new IntegerExp(0); | |
2699 } | |
2700 | |
2701 L1: | |
2702 for (int i = 0; i < sw->cases->dim; i++) | |
2703 { | |
2704 CaseStatement *cs = (CaseStatement *)sw->cases->data[i]; | |
2705 | |
2706 //printf("comparing '%s' with '%s'\n", exp->toChars(), cs->exp->toChars()); | |
2707 if (cs->exp->equals(exp)) | |
2708 { error("duplicate case %s in switch statement", exp->toChars()); | |
2709 break; | |
2710 } | |
2711 } | |
2712 | |
2713 sw->cases->push(this); | |
2714 | |
2715 // Resolve any goto case's with no exp to this case statement | |
2716 for (int i = 0; i < sw->gotoCases.dim; i++) | |
2717 { | |
2718 GotoCaseStatement *gcs = (GotoCaseStatement *)sw->gotoCases.data[i]; | |
2719 | |
2720 if (!gcs->exp) | |
2721 { | |
2722 gcs->cs = this; | |
2723 sw->gotoCases.remove(i); // remove from array | |
2724 } | |
2725 } | |
2726 | |
2727 if (sc->sw->tf != sc->tf) | |
2728 error("switch and case are in different finally blocks"); | |
2729 } | |
2730 else | |
2731 error("case not in switch statement"); | |
2732 statement = statement->semantic(sc); | |
2733 return this; | |
2734 } | |
2735 | |
2736 int CaseStatement::compare(Object *obj) | |
2737 { | |
2738 // Sort cases so we can do an efficient lookup | |
2739 CaseStatement *cs2 = (CaseStatement *)(obj); | |
2740 | |
2741 return exp->compare(cs2->exp); | |
2742 } | |
2743 | |
2744 int CaseStatement::usesEH() | |
2745 { | |
2746 return statement->usesEH(); | |
2747 } | |
2748 | |
2749 int CaseStatement::blockExit() | |
2750 { | |
2751 return statement->blockExit(); | |
2752 } | |
2753 | |
2754 int CaseStatement::fallOffEnd() | |
2755 { | |
2756 return statement->fallOffEnd(); | |
2757 } | |
2758 | |
2759 int CaseStatement::comeFrom() | |
2760 { | |
2761 return TRUE; | |
2762 } | |
2763 | |
2764 void CaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2765 { | |
2766 buf->writestring("case "); | |
2767 exp->toCBuffer(buf, hgs); | |
2768 buf->writebyte(':'); | |
2769 buf->writenl(); | |
2770 statement->toCBuffer(buf, hgs); | |
2771 } | |
2772 | |
2773 /******************************** DefaultStatement ***************************/ | |
2774 | |
2775 DefaultStatement::DefaultStatement(Loc loc, Statement *s) | |
2776 : Statement(loc) | |
2777 { | |
2778 this->statement = s; | |
2779 #if IN_GCC | |
2780 + cblock = NULL; | |
2781 #endif | |
2782 bodyBB = NULL; | |
2783 } | |
2784 | |
2785 Statement *DefaultStatement::syntaxCopy() | |
2786 { | |
2787 DefaultStatement *s = new DefaultStatement(loc, statement->syntaxCopy()); | |
2788 return s; | |
2789 } | |
2790 | |
2791 Statement *DefaultStatement::semantic(Scope *sc) | |
2792 { | |
2793 //printf("DefaultStatement::semantic()\n"); | |
2794 if (sc->sw) | |
2795 { | |
2796 if (sc->sw->sdefault) | |
2797 { | |
2798 error("switch statement already has a default"); | |
2799 } | |
2800 sc->sw->sdefault = this; | |
2801 | |
2802 if (sc->sw->tf != sc->tf) | |
2803 error("switch and default are in different finally blocks"); | |
2804 } | |
2805 else | |
2806 error("default not in switch statement"); | |
2807 statement = statement->semantic(sc); | |
2808 return this; | |
2809 } | |
2810 | |
2811 int DefaultStatement::usesEH() | |
2812 { | |
2813 return statement->usesEH(); | |
2814 } | |
2815 | |
2816 int DefaultStatement::blockExit() | |
2817 { | |
2818 return statement->blockExit(); | |
2819 } | |
2820 | |
2821 int DefaultStatement::fallOffEnd() | |
2822 { | |
2823 return statement->fallOffEnd(); | |
2824 } | |
2825 | |
2826 int DefaultStatement::comeFrom() | |
2827 { | |
2828 return TRUE; | |
2829 } | |
2830 | |
2831 void DefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2832 { | |
2833 buf->writestring("default:\n"); | |
2834 statement->toCBuffer(buf, hgs); | |
2835 } | |
2836 | |
2837 /******************************** GotoDefaultStatement ***************************/ | |
2838 | |
2839 GotoDefaultStatement::GotoDefaultStatement(Loc loc) | |
2840 : Statement(loc) | |
2841 { | |
2842 sw = NULL; | |
2843 enclosinghandler = NULL; | |
2844 } | |
2845 | |
2846 Statement *GotoDefaultStatement::syntaxCopy() | |
2847 { | |
2848 GotoDefaultStatement *s = new GotoDefaultStatement(loc); | |
2849 return s; | |
2850 } | |
2851 | |
2852 Statement *GotoDefaultStatement::semantic(Scope *sc) | |
2853 { | |
2854 enclosinghandler = sc->tfOfTry; | |
2855 sw = sc->sw; | |
2856 if (!sw) | |
2857 error("goto default not in switch statement"); | |
2858 return this; | |
2859 } | |
2860 | |
2861 int GotoDefaultStatement::blockExit() | |
2862 { | |
2863 return BEgoto; | |
2864 } | |
2865 | |
2866 int GotoDefaultStatement::fallOffEnd() | |
2867 { | |
2868 return FALSE; | |
2869 } | |
2870 | |
2871 void GotoDefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2872 { | |
2873 buf->writestring("goto default;\n"); | |
2874 } | |
2875 | |
2876 /******************************** GotoCaseStatement ***************************/ | |
2877 | |
2878 GotoCaseStatement::GotoCaseStatement(Loc loc, Expression *exp) | |
2879 : Statement(loc) | |
2880 { | |
2881 cs = NULL; | |
2882 this->exp = exp; | |
2883 enclosinghandler = NULL; | |
2884 sw = NULL; | |
2885 } | |
2886 | |
2887 Statement *GotoCaseStatement::syntaxCopy() | |
2888 { | |
2889 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
2890 GotoCaseStatement *s = new GotoCaseStatement(loc, e); | |
2891 return s; | |
2892 } | |
2893 | |
2894 Statement *GotoCaseStatement::semantic(Scope *sc) | |
2895 { | |
2896 enclosinghandler = sc->tfOfTry; | |
2897 if (exp) | |
2898 exp = exp->semantic(sc); | |
2899 | |
2900 if (!sc->sw) | |
2901 error("goto case not in switch statement"); | |
2902 else | |
2903 { | |
2904 sw = sc->sw; | |
2905 sc->sw->gotoCases.push(this); | |
2906 if (exp) | |
2907 { | |
2908 exp = exp->implicitCastTo(sc, sc->sw->condition->type); | |
2909 exp = exp->optimize(WANTvalue); | |
2910 } | |
2911 } | |
2912 return this; | |
2913 } | |
2914 | |
2915 int GotoCaseStatement::blockExit() | |
2916 { | |
2917 return BEgoto; | |
2918 } | |
2919 | |
2920 int GotoCaseStatement::fallOffEnd() | |
2921 { | |
2922 return FALSE; | |
2923 } | |
2924 | |
2925 void GotoCaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2926 { | |
2927 buf->writestring("goto case"); | |
2928 if (exp) | |
2929 { buf->writebyte(' '); | |
2930 exp->toCBuffer(buf, hgs); | |
2931 } | |
2932 buf->writebyte(';'); | |
2933 buf->writenl(); | |
2934 } | |
2935 | |
2936 /******************************** SwitchErrorStatement ***************************/ | |
2937 | |
2938 SwitchErrorStatement::SwitchErrorStatement(Loc loc) | |
2939 : Statement(loc) | |
2940 { | |
2941 } | |
2942 | |
2943 int SwitchErrorStatement::blockExit() | |
2944 { | |
2945 return BEthrow; | |
2946 } | |
2947 | |
2948 int SwitchErrorStatement::fallOffEnd() | |
2949 { | |
2950 return FALSE; | |
2951 } | |
2952 | |
2953 void SwitchErrorStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
2954 { | |
2955 buf->writestring("SwitchErrorStatement::toCBuffer()"); | |
2956 buf->writenl(); | |
2957 } | |
2958 | |
2959 /******************************** ReturnStatement ***************************/ | |
2960 | |
2961 ReturnStatement::ReturnStatement(Loc loc, Expression *exp) | |
2962 : Statement(loc) | |
2963 { | |
2964 this->exp = exp; | |
2965 this->enclosinghandler = NULL; | |
2966 } | |
2967 | |
2968 Statement *ReturnStatement::syntaxCopy() | |
2969 { | |
2970 Expression *e = NULL; | |
2971 if (exp) | |
2972 e = exp->syntaxCopy(); | |
2973 ReturnStatement *s = new ReturnStatement(loc, e); | |
2974 return s; | |
2975 } | |
2976 | |
2977 Statement *ReturnStatement::semantic(Scope *sc) | |
2978 { | |
2979 //printf("ReturnStatement::semantic() %s\n", toChars()); | |
2980 this->enclosinghandler = sc->tfOfTry; | |
2981 | |
2982 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
2983 Scope *scx = sc; | |
2984 int implicit0 = 0; | |
2985 | |
2986 if (sc->fes) | |
2987 { | |
2988 // Find scope of function foreach is in | |
2989 for (; 1; scx = scx->enclosing) | |
2990 { | |
2991 assert(scx); | |
2992 if (scx->func != fd) | |
2993 { fd = scx->func; // fd is now function enclosing foreach | |
2994 break; | |
2995 } | |
2996 } | |
2997 } | |
2998 | |
2999 Type *tret = fd->type->nextOf(); | |
3000 if (fd->tintro) | |
3001 /* We'll be implicitly casting the return expression to tintro | |
3002 */ | |
3003 tret = fd->tintro->nextOf(); | |
3004 Type *tbret = NULL; | |
3005 | |
3006 if (tret) | |
3007 tbret = tret->toBasetype(); | |
3008 | |
3009 // main() returns 0, even if it returns void | |
3010 if (!exp && (!tbret || tbret->ty == Tvoid) && fd->isMain()) | |
3011 { implicit0 = 1; | |
3012 exp = new IntegerExp(0); | |
3013 } | |
3014 | |
3015 if (sc->incontract || scx->incontract) | |
3016 error("return statements cannot be in contracts"); | |
3017 if (sc->tf || scx->tf) | |
3018 error("return statements cannot be in finally, scope(exit) or scope(success) bodies"); | |
3019 | |
3020 if (fd->isCtorDeclaration()) | |
3021 { | |
3022 // Constructors implicitly do: | |
3023 // return this; | |
3024 if (exp && exp->op != TOKthis) | |
3025 error("cannot return expression from constructor"); | |
3026 exp = new ThisExp(0); | |
3027 } | |
3028 | |
3029 if (!exp) | |
3030 fd->nrvo_can = 0; | |
3031 | |
3032 if (exp) | |
3033 { | |
3034 fd->hasReturnExp |= 1; | |
3035 | |
3036 exp = exp->semantic(sc); | |
3037 exp = resolveProperties(sc, exp); | |
3038 exp = exp->optimize(WANTvalue); | |
3039 | |
3040 if (fd->nrvo_can && exp->op == TOKvar) | |
3041 { VarExp *ve = (VarExp *)exp; | |
3042 VarDeclaration *v = ve->var->isVarDeclaration(); | |
3043 | |
3044 if (((TypeFunction *)fd->type)->isref) | |
3045 // Function returns a reference | |
3046 fd->nrvo_can = 0; | |
3047 else if (!v || v->isOut() || v->isRef()) | |
3048 fd->nrvo_can = 0; | |
3049 else if (tbret->ty == Tstruct && ((TypeStruct *)tbret)->sym->dtor) | |
3050 // Struct being returned has destructors | |
3051 fd->nrvo_can = 0; | |
3052 else if (fd->nrvo_var == NULL) | |
3053 { if (!v->isDataseg() && !v->isParameter() && v->toParent2() == fd) | |
3054 { //printf("Setting nrvo to %s\n", v->toChars()); | |
3055 fd->nrvo_var = v; | |
3056 } | |
3057 else | |
3058 fd->nrvo_can = 0; | |
3059 } | |
3060 else if (fd->nrvo_var != v) | |
3061 fd->nrvo_can = 0; | |
3062 } | |
3063 else | |
3064 fd->nrvo_can = 0; | |
3065 | |
3066 if (fd->returnLabel && tbret->ty != Tvoid) | |
3067 { | |
3068 } | |
3069 else if (fd->inferRetType) | |
3070 { | |
3071 if (fd->type->nextOf()) | |
3072 { | |
3073 if (!exp->type->equals(fd->type->nextOf())) | |
3074 error("mismatched function return type inference of %s and %s", | |
3075 exp->type->toChars(), fd->type->nextOf()->toChars()); | |
3076 } | |
3077 else | |
3078 { | |
3079 ((TypeFunction *)fd->type)->next = exp->type; | |
3080 fd->type = fd->type->semantic(loc, sc); | |
3081 if (!fd->tintro) | |
3082 { tret = fd->type->nextOf(); | |
3083 tbret = tret->toBasetype(); | |
3084 } | |
3085 } | |
3086 } | |
3087 else if (tbret->ty != Tvoid) | |
3088 { | |
3089 exp = exp->implicitCastTo(sc, tret); | |
3090 } | |
3091 } | |
3092 else if (fd->inferRetType) | |
3093 { | |
3094 if (fd->type->nextOf()) | |
3095 { | |
3096 if (fd->type->nextOf()->ty != Tvoid) | |
3097 error("mismatched function return type inference of void and %s", | |
3098 fd->type->nextOf()->toChars()); | |
3099 } | |
3100 else | |
3101 { | |
3102 ((TypeFunction *)fd->type)->next = Type::tvoid; | |
3103 fd->type = fd->type->semantic(loc, sc); | |
3104 if (!fd->tintro) | |
3105 { tret = Type::tvoid; | |
3106 tbret = tret; | |
3107 } | |
3108 } | |
3109 } | |
3110 else if (tbret->ty != Tvoid) // if non-void return | |
3111 error("return expression expected"); | |
3112 | |
3113 if (sc->fes) | |
3114 { | |
3115 Statement *s; | |
3116 | |
3117 if (exp && !implicit0) | |
3118 { | |
3119 exp = exp->implicitCastTo(sc, tret); | |
3120 } | |
3121 if (!exp || exp->op == TOKint64 || exp->op == TOKfloat64 || | |
3122 exp->op == TOKimaginary80 || exp->op == TOKcomplex80 || | |
3123 exp->op == TOKthis || exp->op == TOKsuper || exp->op == TOKnull || | |
3124 exp->op == TOKstring) | |
3125 { | |
3126 sc->fes->cases.push(this); | |
3127 // Construct: return cases.dim+1; | |
3128 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
3129 } | |
3130 else if (fd->type->nextOf()->toBasetype() == Type::tvoid) | |
3131 { | |
3132 s = new ReturnStatement(0, NULL); | |
3133 sc->fes->cases.push(s); | |
3134 | |
3135 // Construct: { exp; return cases.dim + 1; } | |
3136 Statement *s1 = new ExpStatement(loc, exp); | |
3137 Statement *s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
3138 s = new CompoundStatement(loc, s1, s2); | |
3139 } | |
3140 else | |
3141 { | |
3142 // Construct: return vresult; | |
3143 if (!fd->vresult) | |
3144 { // Declare vresult | |
3145 VarDeclaration *v = new VarDeclaration(loc, tret, Id::result, NULL); | |
3146 v->noauto = 1; | |
3147 v->semantic(scx); | |
3148 if (!scx->insert(v)) | |
3149 assert(0); | |
3150 v->parent = fd; | |
3151 fd->vresult = v; | |
3152 } | |
3153 | |
3154 s = new ReturnStatement(0, new VarExp(0, fd->vresult)); | |
3155 sc->fes->cases.push(s); | |
3156 | |
3157 // Construct: { vresult = exp; return cases.dim + 1; } | |
3158 exp = new AssignExp(loc, new VarExp(0, fd->vresult), exp); | |
3159 exp = exp->semantic(sc); | |
3160 Statement *s1 = new ExpStatement(loc, exp); | |
3161 Statement *s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
3162 s = new CompoundStatement(loc, s1, s2); | |
3163 } | |
3164 return s; | |
3165 } | |
3166 | |
3167 if (exp) | |
3168 { | |
3169 if (fd->returnLabel && tbret->ty != Tvoid) | |
3170 { | |
3171 assert(fd->vresult); | |
3172 VarExp *v = new VarExp(0, fd->vresult); | |
3173 | |
3174 exp = new AssignExp(loc, v, exp); | |
3175 exp = exp->semantic(sc); | |
3176 } | |
3177 | |
3178 if (((TypeFunction *)fd->type)->isref) | |
3179 { // Function returns a reference | |
3180 if (tbret->isMutable()) | |
3181 exp = exp->modifiableLvalue(sc, exp); | |
3182 else | |
3183 exp = exp->toLvalue(sc, exp); | |
3184 | |
3185 if (exp->op == TOKvar) | |
3186 { VarExp *ve = (VarExp *)exp; | |
3187 VarDeclaration *v = ve->var->isVarDeclaration(); | |
3188 if (v && !v->isDataseg() && !(v->storage_class & (STCref | STCout))) | |
3189 error("escaping reference to local variable %s", v->toChars()); | |
3190 } | |
3191 } | |
3192 | |
3193 //exp->dump(0); | |
3194 //exp->print(); | |
3195 exp->checkEscape(); | |
3196 } | |
3197 | |
3198 /* BUG: need to issue an error on: | |
3199 * this | |
3200 * { if (x) return; | |
3201 * super(); | |
3202 * } | |
3203 */ | |
3204 | |
3205 if (sc->callSuper & CSXany_ctor && | |
3206 !(sc->callSuper & (CSXthis_ctor | CSXsuper_ctor))) | |
3207 error("return without calling constructor"); | |
3208 | |
3209 sc->callSuper |= CSXreturn; | |
3210 | |
3211 // See if all returns are instead to be replaced with a goto returnLabel; | |
3212 if (fd->returnLabel) | |
3213 { | |
3214 GotoStatement *gs = new GotoStatement(loc, Id::returnLabel); | |
3215 | |
3216 gs->label = fd->returnLabel; | |
3217 if (exp) | |
3218 { /* Replace: return exp; | |
3219 * with: exp; goto returnLabel; | |
3220 */ | |
3221 Statement *s = new ExpStatement(0, exp); | |
3222 return new CompoundStatement(loc, s, gs); | |
3223 } | |
3224 return gs; | |
3225 } | |
3226 | |
3227 if (exp && tbret->ty == Tvoid && !fd->isMain()) | |
3228 { | |
3229 /* Replace: | |
3230 * return exp; | |
3231 * with: | |
3232 * exp; return; | |
3233 */ | |
3234 Statement *s = new ExpStatement(loc, exp); | |
3235 loc = 0; | |
3236 exp = NULL; | |
3237 return new CompoundStatement(loc, s, this); | |
3238 } | |
3239 | |
3240 return this; | |
3241 } | |
3242 | |
3243 int ReturnStatement::blockExit() | |
3244 { int result = BEreturn; | |
3245 | |
3246 if (exp && exp->canThrow()) | |
3247 result |= BEthrow; | |
3248 return result; | |
3249 } | |
3250 | |
3251 int ReturnStatement::fallOffEnd() | |
3252 { | |
3253 return FALSE; | |
3254 } | |
3255 | |
3256 void ReturnStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3257 { | |
3258 buf->printf("return "); | |
3259 if (exp) | |
3260 exp->toCBuffer(buf, hgs); | |
3261 buf->writeByte(';'); | |
3262 buf->writenl(); | |
3263 } | |
3264 | |
3265 /******************************** BreakStatement ***************************/ | |
3266 | |
3267 BreakStatement::BreakStatement(Loc loc, Identifier *ident) | |
3268 : Statement(loc) | |
3269 { | |
3270 this->ident = ident; | |
3271 this->enclosinghandler = NULL; | |
3272 } | |
3273 | |
3274 Statement *BreakStatement::syntaxCopy() | |
3275 { | |
3276 BreakStatement *s = new BreakStatement(loc, ident); | |
3277 return s; | |
3278 } | |
3279 | |
3280 Statement *BreakStatement::semantic(Scope *sc) | |
3281 { | |
3282 //printf("BreakStatement::semantic()\n"); | |
3283 enclosinghandler = sc->tfOfTry; | |
3284 // If: | |
3285 // break Identifier; | |
3286 if (ident) | |
3287 { | |
3288 Scope *scx; | |
3289 FuncDeclaration *thisfunc = sc->func; | |
3290 | |
3291 for (scx = sc; scx; scx = scx->enclosing) | |
3292 { | |
3293 LabelStatement *ls; | |
3294 | |
3295 if (scx->func != thisfunc) // if in enclosing function | |
3296 { | |
3297 if (sc->fes) // if this is the body of a foreach | |
3298 { | |
3299 /* Post this statement to the fes, and replace | |
3300 * it with a return value that caller will put into | |
3301 * a switch. Caller will figure out where the break | |
3302 * label actually is. | |
3303 * Case numbers start with 2, not 0, as 0 is continue | |
3304 * and 1 is break. | |
3305 */ | |
3306 Statement *s; | |
3307 sc->fes->cases.push(this); | |
3308 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
3309 return s; | |
3310 } | |
3311 break; // can't break to it | |
3312 } | |
3313 | |
3314 ls = scx->slabel; | |
3315 if (ls && ls->ident == ident) | |
3316 { | |
3317 Statement *s = ls->statement; | |
3318 | |
3319 if (!s->hasBreak()) | |
3320 error("label '%s' has no break", ident->toChars()); | |
3321 if (ls->tf != sc->tf) | |
3322 error("cannot break out of finally block"); | |
3323 | |
3324 this->target = ls; | |
3325 return this; | |
3326 } | |
3327 } | |
3328 error("enclosing label '%s' for break not found", ident->toChars()); | |
3329 } | |
3330 else if (!sc->sbreak) | |
3331 { | |
3332 if (sc->fes) | |
3333 { Statement *s; | |
3334 | |
3335 // Replace break; with return 1; | |
3336 s = new ReturnStatement(0, new IntegerExp(1)); | |
3337 return s; | |
3338 } | |
3339 error("break is not inside a loop or switch"); | |
3340 } | |
3341 return this; | |
3342 } | |
3343 | |
3344 int BreakStatement::blockExit() | |
3345 { | |
3346 //printf("BreakStatement::blockExit(%p) = x%x\n", this, ident ? BEgoto : BEbreak); | |
3347 return ident ? BEgoto : BEbreak; | |
3348 } | |
3349 | |
3350 int BreakStatement::fallOffEnd() | |
3351 { | |
3352 return FALSE; | |
3353 } | |
3354 | |
3355 void BreakStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3356 { | |
3357 buf->writestring("break"); | |
3358 if (ident) | |
3359 { buf->writebyte(' '); | |
3360 buf->writestring(ident->toChars()); | |
3361 } | |
3362 buf->writebyte(';'); | |
3363 buf->writenl(); | |
3364 } | |
3365 | |
3366 /******************************** ContinueStatement ***************************/ | |
3367 | |
3368 ContinueStatement::ContinueStatement(Loc loc, Identifier *ident) | |
3369 : Statement(loc) | |
3370 { | |
3371 this->ident = ident; | |
3372 this->enclosinghandler = NULL; | |
3373 } | |
3374 | |
3375 Statement *ContinueStatement::syntaxCopy() | |
3376 { | |
3377 ContinueStatement *s = new ContinueStatement(loc, ident); | |
3378 return s; | |
3379 } | |
3380 | |
3381 Statement *ContinueStatement::semantic(Scope *sc) | |
3382 { | |
3383 enclosinghandler = sc->tfOfTry; | |
3384 //printf("ContinueStatement::semantic() %p\n", this); | |
3385 if (ident) | |
3386 { | |
3387 Scope *scx; | |
3388 FuncDeclaration *thisfunc = sc->func; | |
3389 | |
3390 for (scx = sc; scx; scx = scx->enclosing) | |
3391 { | |
3392 LabelStatement *ls; | |
3393 | |
3394 if (scx->func != thisfunc) // if in enclosing function | |
3395 { | |
3396 if (sc->fes) // if this is the body of a foreach | |
3397 { | |
3398 for (; scx; scx = scx->enclosing) | |
3399 { | |
3400 ls = scx->slabel; | |
3401 if (ls && ls->ident == ident && ls->statement == sc->fes) | |
3402 { | |
3403 // Replace continue ident; with return 0; | |
3404 return new ReturnStatement(0, new IntegerExp(0)); | |
3405 } | |
3406 } | |
3407 | |
3408 /* Post this statement to the fes, and replace | |
3409 * it with a return value that caller will put into | |
3410 * a switch. Caller will figure out where the break | |
3411 * label actually is. | |
3412 * Case numbers start with 2, not 0, as 0 is continue | |
3413 * and 1 is break. | |
3414 */ | |
3415 Statement *s; | |
3416 sc->fes->cases.push(this); | |
3417 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
3418 return s; | |
3419 } | |
3420 break; // can't continue to it | |
3421 } | |
3422 | |
3423 ls = scx->slabel; | |
3424 if (ls && ls->ident == ident) | |
3425 { | |
3426 Statement *s = ls->statement; | |
3427 | |
3428 if (!s->hasContinue()) | |
3429 error("label '%s' has no continue", ident->toChars()); | |
3430 if (ls->tf != sc->tf) | |
3431 error("cannot continue out of finally block"); | |
3432 | |
3433 this->target = ls; | |
3434 return this; | |
3435 } | |
3436 } | |
3437 error("enclosing label '%s' for continue not found", ident->toChars()); | |
3438 } | |
3439 else if (!sc->scontinue) | |
3440 { | |
3441 if (sc->fes) | |
3442 { Statement *s; | |
3443 | |
3444 // Replace continue; with return 0; | |
3445 s = new ReturnStatement(0, new IntegerExp(0)); | |
3446 return s; | |
3447 } | |
3448 error("continue is not inside a loop"); | |
3449 } | |
3450 return this; | |
3451 } | |
3452 | |
3453 int ContinueStatement::blockExit() | |
3454 { | |
3455 return ident ? BEgoto : BEcontinue; | |
3456 } | |
3457 | |
3458 int ContinueStatement::fallOffEnd() | |
3459 { | |
3460 return FALSE; | |
3461 } | |
3462 | |
3463 void ContinueStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3464 { | |
3465 buf->writestring("continue"); | |
3466 if (ident) | |
3467 { buf->writebyte(' '); | |
3468 buf->writestring(ident->toChars()); | |
3469 } | |
3470 buf->writebyte(';'); | |
3471 buf->writenl(); | |
3472 } | |
3473 | |
3474 /******************************** SynchronizedStatement ***************************/ | |
3475 | |
3476 SynchronizedStatement::SynchronizedStatement(Loc loc, Expression *exp, Statement *body) | |
3477 : Statement(loc) | |
3478 { | |
3479 this->exp = exp; | |
3480 this->body = body; | |
3481 this->esync = NULL; | |
3482 this->enclosinghandler = NULL; | |
3483 // LDC | |
3484 this->llsync = NULL; | |
3485 } | |
3486 | |
3487 SynchronizedStatement::SynchronizedStatement(Loc loc, elem *esync, Statement *body) | |
3488 : Statement(loc) | |
3489 { | |
3490 this->exp = NULL; | |
3491 this->body = body; | |
3492 this->esync = esync; | |
3493 this->enclosinghandler = NULL; | |
3494 // LDC | |
3495 this->llsync = NULL; | |
3496 } | |
3497 | |
3498 Statement *SynchronizedStatement::syntaxCopy() | |
3499 { | |
3500 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
3501 SynchronizedStatement *s = new SynchronizedStatement(loc, e, body ? body->syntaxCopy() : NULL); | |
3502 return s; | |
3503 } | |
3504 | |
3505 Statement *SynchronizedStatement::semantic(Scope *sc) | |
3506 { | |
3507 if (exp) | |
3508 { ClassDeclaration *cd; | |
3509 | |
3510 exp = exp->semantic(sc); | |
3511 exp = resolveProperties(sc, exp); | |
3512 cd = exp->type->isClassHandle(); | |
3513 if (!cd) | |
3514 error("can only synchronize on class objects, not '%s'", exp->type->toChars()); | |
3515 else if (cd->isInterfaceDeclaration()) | |
3516 { Type *t = new TypeIdentifier(0, Id::Object); | |
3517 | |
3518 t = t->semantic(0, sc); | |
3519 exp = new CastExp(loc, exp, t); | |
3520 exp = exp->semantic(sc); | |
3521 } | |
3522 } | |
3523 if (body) | |
3524 { | |
3525 enclosinghandler = sc->tfOfTry; | |
3526 sc->tfOfTry = new EnclosingSynchro(this); | |
3527 body = body->semantic(sc); | |
3528 sc->tfOfTry = enclosinghandler; | |
3529 } | |
3530 return this; | |
3531 } | |
3532 | |
3533 int SynchronizedStatement::hasBreak() | |
3534 { | |
3535 return FALSE; //TRUE; | |
3536 } | |
3537 | |
3538 int SynchronizedStatement::hasContinue() | |
3539 { | |
3540 return FALSE; //TRUE; | |
3541 } | |
3542 | |
3543 int SynchronizedStatement::usesEH() | |
3544 { | |
3545 return TRUE; | |
3546 } | |
3547 | |
3548 int SynchronizedStatement::blockExit() | |
3549 { | |
3550 return body ? body->blockExit() : BEfallthru; | |
3551 } | |
3552 | |
3553 int SynchronizedStatement::fallOffEnd() | |
3554 { | |
3555 return body ? body->fallOffEnd() : TRUE; | |
3556 } | |
3557 | |
3558 void SynchronizedStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3559 { | |
3560 buf->writestring("synchronized"); | |
3561 if (exp) | |
3562 { buf->writebyte('('); | |
3563 exp->toCBuffer(buf, hgs); | |
3564 buf->writebyte(')'); | |
3565 } | |
3566 if (body) | |
3567 { | |
3568 buf->writebyte(' '); | |
3569 body->toCBuffer(buf, hgs); | |
3570 } | |
3571 } | |
3572 | |
3573 /******************************** WithStatement ***************************/ | |
3574 | |
3575 WithStatement::WithStatement(Loc loc, Expression *exp, Statement *body) | |
3576 : Statement(loc) | |
3577 { | |
3578 this->exp = exp; | |
3579 this->body = body; | |
3580 wthis = NULL; | |
3581 } | |
3582 | |
3583 Statement *WithStatement::syntaxCopy() | |
3584 { | |
3585 WithStatement *s = new WithStatement(loc, exp->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
3586 return s; | |
3587 } | |
3588 | |
3589 Statement *WithStatement::semantic(Scope *sc) | |
3590 { ScopeDsymbol *sym; | |
3591 Initializer *init; | |
3592 | |
3593 //printf("WithStatement::semantic()\n"); | |
3594 exp = exp->semantic(sc); | |
3595 exp = resolveProperties(sc, exp); | |
3596 if (exp->op == TOKimport) | |
3597 { ScopeExp *es = (ScopeExp *)exp; | |
3598 | |
3599 sym = es->sds; | |
3600 } | |
3601 else if (exp->op == TOKtype) | |
3602 { TypeExp *es = (TypeExp *)exp; | |
3603 | |
3604 sym = es->type->toDsymbol(sc)->isScopeDsymbol(); | |
3605 if (!sym) | |
3606 { error("%s has no members", es->toChars()); | |
3607 body = body->semantic(sc); | |
3608 return this; | |
3609 } | |
3610 } | |
3611 else | |
3612 { Type *t = exp->type; | |
3613 | |
3614 assert(t); | |
3615 t = t->toBasetype(); | |
3616 if (t->isClassHandle()) | |
3617 { | |
3618 init = new ExpInitializer(loc, exp); | |
3619 wthis = new VarDeclaration(loc, exp->type, Id::withSym, init); | |
3620 wthis->semantic(sc); | |
3621 | |
3622 sym = new WithScopeSymbol(this); | |
3623 sym->parent = sc->scopesym; | |
3624 } | |
3625 else if (t->ty == Tstruct) | |
3626 { | |
3627 Expression *e = exp->addressOf(sc); | |
3628 init = new ExpInitializer(loc, e); | |
3629 wthis = new VarDeclaration(loc, e->type, Id::withSym, init); | |
3630 wthis->semantic(sc); | |
3631 sym = new WithScopeSymbol(this); | |
3632 sym->parent = sc->scopesym; | |
3633 } | |
3634 else | |
3635 { error("with expressions must be class objects, not '%s'", exp->type->toChars()); | |
3636 return NULL; | |
3637 } | |
3638 } | |
3639 sc = sc->push(sym); | |
3640 | |
3641 if (body) | |
3642 body = body->semantic(sc); | |
3643 | |
3644 sc->pop(); | |
3645 | |
3646 return this; | |
3647 } | |
3648 | |
3649 void WithStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3650 { | |
3651 buf->writestring("with ("); | |
3652 exp->toCBuffer(buf, hgs); | |
3653 buf->writestring(")\n"); | |
3654 if (body) | |
3655 body->toCBuffer(buf, hgs); | |
3656 } | |
3657 | |
3658 int WithStatement::usesEH() | |
3659 { | |
3660 return body ? body->usesEH() : 0; | |
3661 } | |
3662 | |
3663 int WithStatement::blockExit() | |
3664 { | |
3665 int result = BEnone; | |
3666 if (exp->canThrow()) | |
3667 result = BEthrow; | |
3668 if (body) | |
3669 result |= body->blockExit(); | |
3670 else | |
3671 result |= BEfallthru; | |
3672 return result; | |
3673 } | |
3674 | |
3675 int WithStatement::fallOffEnd() | |
3676 { | |
3677 return body ? body->fallOffEnd() : TRUE; | |
3678 } | |
3679 | |
3680 /******************************** TryCatchStatement ***************************/ | |
3681 | |
3682 TryCatchStatement::TryCatchStatement(Loc loc, Statement *body, Array *catches) | |
3683 : Statement(loc) | |
3684 { | |
3685 this->body = body; | |
3686 this->catches = catches; | |
3687 } | |
3688 | |
3689 Statement *TryCatchStatement::syntaxCopy() | |
3690 { | |
3691 Array *a = new Array(); | |
3692 a->setDim(catches->dim); | |
3693 for (int i = 0; i < a->dim; i++) | |
3694 { Catch *c; | |
3695 | |
3696 c = (Catch *)catches->data[i]; | |
3697 c = c->syntaxCopy(); | |
3698 a->data[i] = c; | |
3699 } | |
3700 TryCatchStatement *s = new TryCatchStatement(loc, body->syntaxCopy(), a); | |
3701 return s; | |
3702 } | |
3703 | |
3704 Statement *TryCatchStatement::semantic(Scope *sc) | |
3705 { | |
3706 body = body->semanticScope(sc, NULL /*this*/, NULL); | |
3707 | |
3708 /* Even if body is NULL, still do semantic analysis on catches | |
3709 */ | |
3710 for (size_t i = 0; i < catches->dim; i++) | |
3711 { Catch *c = (Catch *)catches->data[i]; | |
3712 c->semantic(sc); | |
3713 | |
3714 // Determine if current catch 'hides' any previous catches | |
3715 for (size_t j = 0; j < i; j++) | |
3716 { Catch *cj = (Catch *)catches->data[j]; | |
3717 char *si = c->loc.toChars(); | |
3718 char *sj = cj->loc.toChars(); | |
3719 | |
3720 if (c->type->toBasetype()->implicitConvTo(cj->type->toBasetype())) | |
3721 error("catch at %s hides catch at %s", sj, si); | |
3722 } | |
3723 } | |
3724 | |
3725 if (!body) | |
3726 return NULL; | |
3727 | |
3728 return this; | |
3729 } | |
3730 | |
3731 int TryCatchStatement::hasBreak() | |
3732 { | |
3733 return FALSE; //TRUE; | |
3734 } | |
3735 | |
3736 int TryCatchStatement::usesEH() | |
3737 { | |
3738 return TRUE; | |
3739 } | |
3740 | |
3741 int TryCatchStatement::blockExit() | |
3742 { int result; | |
3743 | |
3744 assert(body); | |
3745 result = body->blockExit(); | |
3746 | |
3747 for (size_t i = 0; i < catches->dim; i++) | |
3748 { | |
3749 Catch *c = (Catch *)catches->data[i]; | |
3750 result |= c->blockExit(); | |
3751 } | |
3752 return result; | |
3753 } | |
3754 | |
3755 int TryCatchStatement::fallOffEnd() | |
3756 { | |
3757 int result = FALSE; | |
3758 | |
3759 if (body) | |
3760 result = body->fallOffEnd(); | |
3761 for (int i = 0; i < catches->dim; i++) | |
3762 { Catch *c; | |
3763 | |
3764 c = (Catch *)catches->data[i]; | |
3765 if (c->handler) | |
3766 result |= c->handler->fallOffEnd(); | |
3767 } | |
3768 return result; | |
3769 } | |
3770 | |
3771 void TryCatchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3772 { | |
3773 buf->writestring("try"); | |
3774 buf->writenl(); | |
3775 if (body) | |
3776 body->toCBuffer(buf, hgs); | |
3777 for (size_t i = 0; i < catches->dim; i++) | |
3778 { | |
3779 Catch *c = (Catch *)catches->data[i]; | |
3780 c->toCBuffer(buf, hgs); | |
3781 } | |
3782 } | |
3783 | |
3784 /******************************** Catch ***************************/ | |
3785 | |
3786 Catch::Catch(Loc loc, Type *t, Identifier *id, Statement *handler) | |
3787 { | |
3788 //printf("Catch(%s, loc = %s)\n", id->toChars(), loc.toChars()); | |
3789 this->loc = loc; | |
3790 this->type = t; | |
3791 this->ident = id; | |
3792 this->handler = handler; | |
3793 var = NULL; | |
3794 } | |
3795 | |
3796 Catch *Catch::syntaxCopy() | |
3797 { | |
3798 Catch *c = new Catch(loc, | |
3799 (type ? type->syntaxCopy() : NULL), | |
3800 ident, | |
3801 (handler ? handler->syntaxCopy() : NULL)); | |
3802 return c; | |
3803 } | |
3804 | |
3805 void Catch::semantic(Scope *sc) | |
3806 { ScopeDsymbol *sym; | |
3807 | |
3808 //printf("Catch::semantic(%s)\n", ident->toChars()); | |
3809 | |
3810 #ifndef IN_GCC | |
3811 if (sc->tf) | |
3812 { | |
3813 /* This is because the _d_local_unwind() gets the stack munged | |
3814 * up on this. The workaround is to place any try-catches into | |
3815 * a separate function, and call that. | |
3816 * To fix, have the compiler automatically convert the finally | |
3817 * body into a nested function. | |
3818 */ | |
3819 error(loc, "cannot put catch statement inside finally block"); | |
3820 } | |
3821 #endif | |
3822 | |
3823 sym = new ScopeDsymbol(); | |
3824 sym->parent = sc->scopesym; | |
3825 sc = sc->push(sym); | |
3826 | |
3827 if (!type) | |
3828 type = new TypeIdentifier(0, Id::Object); | |
3829 type = type->semantic(loc, sc); | |
3830 if (!type->toBasetype()->isClassHandle()) | |
3831 error("can only catch class objects, not '%s'", type->toChars()); | |
3832 else if (ident) | |
3833 { | |
3834 var = new VarDeclaration(loc, type, ident, NULL); | |
3835 var->parent = sc->parent; | |
3836 sc->insert(var); | |
3837 } | |
3838 handler = handler->semantic(sc); | |
3839 | |
3840 sc->pop(); | |
3841 } | |
3842 | |
3843 int Catch::blockExit() | |
3844 { | |
3845 return handler ? handler->blockExit() : BEfallthru; | |
3846 } | |
3847 | |
3848 void Catch::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3849 { | |
3850 buf->writestring("catch"); | |
3851 if (type) | |
3852 { buf->writebyte('('); | |
3853 type->toCBuffer(buf, ident, hgs); | |
3854 buf->writebyte(')'); | |
3855 } | |
3856 buf->writenl(); | |
3857 buf->writebyte('{'); | |
3858 buf->writenl(); | |
3859 if (handler) | |
3860 handler->toCBuffer(buf, hgs); | |
3861 buf->writebyte('}'); | |
3862 buf->writenl(); | |
3863 } | |
3864 | |
3865 /****************************** TryFinallyStatement ***************************/ | |
3866 | |
3867 TryFinallyStatement::TryFinallyStatement(Loc loc, Statement *body, Statement *finalbody) | |
3868 : Statement(loc) | |
3869 { | |
3870 this->body = body; | |
3871 this->finalbody = finalbody; | |
3872 this->enclosinghandler = NULL; | |
3873 } | |
3874 | |
3875 Statement *TryFinallyStatement::syntaxCopy() | |
3876 { | |
3877 TryFinallyStatement *s = new TryFinallyStatement(loc, | |
3878 body->syntaxCopy(), finalbody->syntaxCopy()); | |
3879 return s; | |
3880 } | |
3881 | |
3882 Statement *TryFinallyStatement::semantic(Scope *sc) | |
3883 { | |
3884 //printf("TryFinallyStatement::semantic()\n"); | |
3885 | |
3886 enclosinghandler = sc->tfOfTry; | |
3887 sc->tfOfTry = new EnclosingTryFinally(this); | |
3888 body = body->semantic(sc); | |
3889 sc->tfOfTry = enclosinghandler; | |
3890 | |
3891 sc = sc->push(); | |
3892 sc->tf = this; | |
3893 sc->sbreak = NULL; | |
3894 sc->scontinue = NULL; // no break or continue out of finally block | |
3895 finalbody = finalbody->semantic(sc); | |
3896 sc->pop(); | |
3897 if (!body) | |
3898 return finalbody; | |
3899 if (!finalbody) | |
3900 return body; | |
3901 if (body->blockExit() == BEfallthru) | |
3902 { Statement *s = new CompoundStatement(loc, body, finalbody); | |
3903 return s; | |
3904 } | |
3905 return this; | |
3906 } | |
3907 | |
3908 void TryFinallyStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3909 { | |
3910 buf->printf("try\n{\n"); | |
3911 body->toCBuffer(buf, hgs); | |
3912 buf->printf("}\nfinally\n{\n"); | |
3913 finalbody->toCBuffer(buf, hgs); | |
3914 buf->writeByte('}'); | |
3915 buf->writenl(); | |
3916 } | |
3917 | |
3918 int TryFinallyStatement::hasBreak() | |
3919 { | |
3920 return FALSE; //TRUE; | |
3921 } | |
3922 | |
3923 int TryFinallyStatement::hasContinue() | |
3924 { | |
3925 return FALSE; //TRUE; | |
3926 } | |
3927 | |
3928 int TryFinallyStatement::usesEH() | |
3929 { | |
3930 return TRUE; | |
3931 } | |
3932 | |
3933 int TryFinallyStatement::blockExit() | |
3934 { | |
3935 int result = body->blockExit(); | |
3936 return result; | |
3937 } | |
3938 | |
3939 int TryFinallyStatement::fallOffEnd() | |
3940 { int result; | |
3941 | |
3942 result = body->fallOffEnd(); | |
3943 // if (finalbody) | |
3944 // result = finalbody->fallOffEnd(); | |
3945 return result; | |
3946 } | |
3947 | |
3948 /****************************** OnScopeStatement ***************************/ | |
3949 | |
3950 OnScopeStatement::OnScopeStatement(Loc loc, TOK tok, Statement *statement) | |
3951 : Statement(loc) | |
3952 { | |
3953 this->tok = tok; | |
3954 this->statement = statement; | |
3955 } | |
3956 | |
3957 Statement *OnScopeStatement::syntaxCopy() | |
3958 { | |
3959 OnScopeStatement *s = new OnScopeStatement(loc, | |
3960 tok, statement->syntaxCopy()); | |
3961 return s; | |
3962 } | |
3963 | |
3964 Statement *OnScopeStatement::semantic(Scope *sc) | |
3965 { | |
3966 /* semantic is called on results of scopeCode() */ | |
3967 return this; | |
3968 } | |
3969 | |
3970 int OnScopeStatement::blockExit() | |
3971 { // At this point, this statement is just an empty placeholder | |
3972 return BEfallthru; | |
3973 } | |
3974 | |
3975 void OnScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
3976 { | |
3977 buf->writestring(Token::toChars(tok)); | |
3978 buf->writebyte(' '); | |
3979 statement->toCBuffer(buf, hgs); | |
3980 } | |
3981 | |
3982 int OnScopeStatement::usesEH() | |
3983 { | |
3984 return 1; | |
3985 } | |
3986 | |
3987 void OnScopeStatement::scopeCode(Scope *sc, Statement **sentry, Statement **sexception, Statement **sfinally) | |
3988 { | |
3989 //printf("OnScopeStatement::scopeCode()\n"); | |
3990 //print(); | |
3991 *sentry = NULL; | |
3992 *sexception = NULL; | |
3993 *sfinally = NULL; | |
3994 switch (tok) | |
3995 { | |
3996 case TOKon_scope_exit: | |
3997 *sfinally = statement; | |
3998 break; | |
3999 | |
4000 case TOKon_scope_failure: | |
4001 *sexception = statement; | |
4002 break; | |
4003 | |
4004 case TOKon_scope_success: | |
4005 { | |
4006 /* Create: | |
4007 * sentry: int x = 0; | |
4008 * sexception: x = 1; | |
4009 * sfinally: if (!x) statement; | |
4010 */ | |
4011 Identifier *id = Lexer::uniqueId("__os"); | |
4012 | |
4013 ExpInitializer *ie = new ExpInitializer(loc, new IntegerExp(0)); | |
4014 VarDeclaration *v = new VarDeclaration(loc, Type::tint32, id, ie); | |
4015 *sentry = new DeclarationStatement(loc, v); | |
4016 | |
4017 Expression *e = new IntegerExp(1); | |
4018 e = new AssignExp(0, new VarExp(0, v), e); | |
4019 *sexception = new ExpStatement(0, e); | |
4020 | |
4021 e = new VarExp(0, v); | |
4022 e = new NotExp(0, e); | |
4023 *sfinally = new IfStatement(0, NULL, e, statement, NULL); | |
4024 | |
4025 break; | |
4026 } | |
4027 | |
4028 default: | |
4029 assert(0); | |
4030 } | |
4031 } | |
4032 | |
4033 /******************************** ThrowStatement ***************************/ | |
4034 | |
4035 ThrowStatement::ThrowStatement(Loc loc, Expression *exp) | |
4036 : Statement(loc) | |
4037 { | |
4038 this->exp = exp; | |
4039 } | |
4040 | |
4041 Statement *ThrowStatement::syntaxCopy() | |
4042 { | |
4043 ThrowStatement *s = new ThrowStatement(loc, exp->syntaxCopy()); | |
4044 return s; | |
4045 } | |
4046 | |
4047 Statement *ThrowStatement::semantic(Scope *sc) | |
4048 { | |
4049 //printf("ThrowStatement::semantic()\n"); | |
4050 | |
4051 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
4052 fd->hasReturnExp |= 2; | |
4053 | |
4054 if (sc->incontract) | |
4055 error("Throw statements cannot be in contracts"); | |
4056 exp = exp->semantic(sc); | |
4057 exp = resolveProperties(sc, exp); | |
4058 if (!exp->type->toBasetype()->isClassHandle()) | |
4059 error("can only throw class objects, not type %s", exp->type->toChars()); | |
4060 return this; | |
4061 } | |
4062 | |
4063 int ThrowStatement::blockExit() | |
4064 { | |
4065 return BEthrow; // obviously | |
4066 } | |
4067 | |
4068 int ThrowStatement::fallOffEnd() | |
4069 { | |
4070 return FALSE; | |
4071 } | |
4072 | |
4073 void ThrowStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4074 { | |
4075 buf->printf("throw "); | |
4076 exp->toCBuffer(buf, hgs); | |
4077 buf->writeByte(';'); | |
4078 buf->writenl(); | |
4079 } | |
4080 | |
4081 /******************************** VolatileStatement **************************/ | |
4082 | |
4083 VolatileStatement::VolatileStatement(Loc loc, Statement *statement) | |
4084 : Statement(loc) | |
4085 { | |
4086 this->statement = statement; | |
4087 this->enclosinghandler = NULL; | |
4088 } | |
4089 | |
4090 Statement *VolatileStatement::syntaxCopy() | |
4091 { | |
4092 VolatileStatement *s = new VolatileStatement(loc, | |
4093 statement ? statement->syntaxCopy() : NULL); | |
4094 return s; | |
4095 } | |
4096 | |
4097 Statement *VolatileStatement::semantic(Scope *sc) | |
4098 { | |
4099 if (statement) | |
4100 { | |
4101 enclosinghandler = sc->tfOfTry; | |
4102 sc->tfOfTry = new EnclosingVolatile(this); | |
4103 statement = statement->semantic(sc); | |
4104 sc->tfOfTry = enclosinghandler; | |
4105 } | |
4106 return this; | |
4107 } | |
4108 | |
4109 Statements *VolatileStatement::flatten(Scope *sc) | |
4110 { | |
4111 Statements *a; | |
4112 | |
4113 a = statement ? statement->flatten(sc) : NULL; | |
4114 if (a) | |
4115 { for (int i = 0; i < a->dim; i++) | |
4116 { Statement *s = (Statement *)a->data[i]; | |
4117 | |
4118 s = new VolatileStatement(loc, s); | |
4119 a->data[i] = s; | |
4120 } | |
4121 } | |
4122 | |
4123 return a; | |
4124 } | |
4125 | |
4126 int VolatileStatement::blockExit() | |
4127 { | |
4128 return statement ? statement->blockExit() : BEfallthru; | |
4129 } | |
4130 | |
4131 int VolatileStatement::fallOffEnd() | |
4132 { | |
4133 return statement ? statement->fallOffEnd() : TRUE; | |
4134 } | |
4135 | |
4136 void VolatileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4137 { | |
4138 buf->writestring("volatile"); | |
4139 if (statement) | |
4140 { if (statement->isScopeStatement()) | |
4141 buf->writenl(); | |
4142 else | |
4143 buf->writebyte(' '); | |
4144 statement->toCBuffer(buf, hgs); | |
4145 } | |
4146 } | |
4147 | |
4148 | |
4149 /******************************** GotoStatement ***************************/ | |
4150 | |
4151 GotoStatement::GotoStatement(Loc loc, Identifier *ident) | |
4152 : Statement(loc) | |
4153 { | |
4154 this->ident = ident; | |
4155 this->label = NULL; | |
4156 this->tf = NULL; | |
4157 this->enclosinghandler = NULL; | |
4158 } | |
4159 | |
4160 Statement *GotoStatement::syntaxCopy() | |
4161 { | |
4162 GotoStatement *s = new GotoStatement(loc, ident); | |
4163 return s; | |
4164 } | |
4165 | |
4166 Statement *GotoStatement::semantic(Scope *sc) | |
4167 { FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
4168 | |
4169 //printf("GotoStatement::semantic()\n"); | |
4170 tf = sc->tf; | |
4171 enclosinghandler = sc->tfOfTry; | |
4172 label = fd->searchLabel(ident); | |
4173 if (!label->statement && sc->fes) | |
4174 { | |
4175 /* Either the goto label is forward referenced or it | |
4176 * is in the function that the enclosing foreach is in. | |
4177 * Can't know yet, so wrap the goto in a compound statement | |
4178 * so we can patch it later, and add it to a 'look at this later' | |
4179 * list. | |
4180 */ | |
4181 Statements *a = new Statements(); | |
4182 Statement *s; | |
4183 | |
4184 a->push(this); | |
4185 s = new CompoundStatement(loc, a); | |
4186 sc->fes->gotos.push(s); // 'look at this later' list | |
4187 return s; | |
4188 } | |
4189 if (label->statement && label->statement->tf != sc->tf) | |
4190 error("cannot goto in or out of finally block"); | |
4191 return this; | |
4192 } | |
4193 | |
4194 int GotoStatement::blockExit() | |
4195 { | |
4196 //printf("GotoStatement::blockExit(%p)\n", this); | |
4197 return BEgoto; | |
4198 } | |
4199 | |
4200 int GotoStatement::fallOffEnd() | |
4201 { | |
4202 return FALSE; | |
4203 } | |
4204 | |
4205 void GotoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4206 { | |
4207 buf->writestring("goto "); | |
4208 buf->writestring(ident->toChars()); | |
4209 buf->writebyte(';'); | |
4210 buf->writenl(); | |
4211 } | |
4212 | |
4213 /******************************** LabelStatement ***************************/ | |
4214 | |
4215 LabelStatement::LabelStatement(Loc loc, Identifier *ident, Statement *statement) | |
4216 : Statement(loc) | |
4217 { | |
4218 this->ident = ident; | |
4219 this->statement = statement; | |
4220 this->tf = NULL; | |
4221 this->enclosinghandler = NULL; | |
4222 this->lblock = NULL; | |
4223 this->isReturnLabel = 0; | |
4224 this->asmLabel = false; | |
4225 } | |
4226 | |
4227 Statement *LabelStatement::syntaxCopy() | |
4228 { | |
4229 LabelStatement *s = new LabelStatement(loc, ident, statement->syntaxCopy()); | |
4230 return s; | |
4231 } | |
4232 | |
4233 Statement *LabelStatement::semantic(Scope *sc) | |
4234 { LabelDsymbol *ls; | |
4235 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
4236 | |
4237 //printf("LabelStatement::semantic()\n"); | |
4238 ls = fd->searchLabel(ident); | |
4239 if (ls->statement) | |
4240 error("Label '%s' already defined", ls->toChars()); | |
4241 else | |
4242 ls->statement = this; | |
4243 tf = sc->tf; | |
4244 enclosinghandler = sc->tfOfTry; | |
4245 sc = sc->push(); | |
4246 sc->scopesym = sc->enclosing->scopesym; | |
4247 sc->callSuper |= CSXlabel; | |
4248 sc->slabel = this; | |
4249 if (statement) | |
4250 statement = statement->semantic(sc); | |
4251 sc->pop(); | |
4252 | |
4253 // LDC put in labmap | |
4254 fd->labmap[ident->toChars()] = this; | |
4255 | |
4256 return this; | |
4257 } | |
4258 | |
4259 Statements *LabelStatement::flatten(Scope *sc) | |
4260 { | |
4261 Statements *a = NULL; | |
4262 | |
4263 if (statement) | |
4264 { | |
4265 a = statement->flatten(sc); | |
4266 if (a) | |
4267 { | |
4268 if (!a->dim) | |
4269 { | |
4270 a->push(new ExpStatement(loc, NULL)); | |
4271 } | |
4272 Statement *s = (Statement *)a->data[0]; | |
4273 | |
4274 s = new LabelStatement(loc, ident, s); | |
4275 a->data[0] = s; | |
4276 } | |
4277 } | |
4278 | |
4279 return a; | |
4280 } | |
4281 | |
4282 | |
4283 int LabelStatement::usesEH() | |
4284 { | |
4285 return statement ? statement->usesEH() : FALSE; | |
4286 } | |
4287 | |
4288 int LabelStatement::blockExit() | |
4289 { | |
4290 //printf("LabelStatement::blockExit(%p)\n", this); | |
4291 return statement ? statement->blockExit() : BEfallthru; | |
4292 } | |
4293 | |
4294 int LabelStatement::fallOffEnd() | |
4295 { | |
4296 return statement ? statement->fallOffEnd() : TRUE; | |
4297 } | |
4298 | |
4299 int LabelStatement::comeFrom() | |
4300 { | |
4301 //printf("LabelStatement::comeFrom()\n"); | |
4302 return TRUE; | |
4303 } | |
4304 | |
4305 void LabelStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
4306 { | |
4307 buf->writestring(ident->toChars()); | |
4308 buf->writebyte(':'); | |
4309 buf->writenl(); | |
4310 if (statement) | |
4311 statement->toCBuffer(buf, hgs); | |
4312 } | |
4313 | |
4314 | |
4315 /******************************** LabelDsymbol ***************************/ | |
4316 | |
4317 LabelDsymbol::LabelDsymbol(Identifier *ident) | |
4318 : Dsymbol(ident) | |
4319 { | |
4320 statement = NULL; | |
4321 } | |
4322 | |
4323 LabelDsymbol *LabelDsymbol::isLabel() // is this a LabelDsymbol()? | |
4324 { | |
4325 return this; | |
4326 } | |
4327 | |
4328 |