Mercurial > projects > ldc
annotate dmd/statement.c @ 262:88252a1af660 trunk
[svn r280] Fixed a bunch of issues with switch statements. Ended up a bit far reaching...
| author | lindquist |
|---|---|
| date | Sat, 14 Jun 2008 05:13:49 +0200 |
| parents | 092468448d25 |
| children | 665b81613475 |
| rev | line source |
|---|---|
| 159 | 1 |
| 2 // Compiler implementation of the D programming language | |
| 3 // Copyright (c) 1999-2007 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 | |
| 30 /******************************** Statement ***************************/ | |
| 31 | |
| 32 Statement::Statement(Loc loc) | |
| 33 : loc(loc) | |
| 34 { | |
| 35 #ifdef _DH | |
| 36 // If this is an in{} contract scope statement (skip for determining | |
| 37 // inlineStatus of a function body for header content) | |
| 38 incontract = 0; | |
| 39 #endif | |
| 40 } | |
| 41 | |
| 42 Statement *Statement::syntaxCopy() | |
| 43 { | |
| 44 assert(0); | |
| 45 return NULL; | |
| 46 } | |
| 47 | |
| 48 void Statement::print() | |
| 49 { | |
| 50 fprintf(stdmsg, "%s\n", toChars()); | |
| 51 fflush(stdmsg); | |
| 52 } | |
| 53 | |
| 54 char *Statement::toChars() | |
| 55 { OutBuffer *buf; | |
| 56 HdrGenState hgs; | |
| 57 | |
| 58 buf = new OutBuffer(); | |
| 59 toCBuffer(buf, &hgs); | |
| 60 return buf->toChars(); | |
| 61 } | |
| 62 | |
| 63 void Statement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 64 { | |
| 65 buf->printf("Statement::toCBuffer()"); | |
| 66 buf->writenl(); | |
| 67 } | |
| 68 | |
| 69 Statement *Statement::semantic(Scope *sc) | |
| 70 { | |
| 71 return this; | |
| 72 } | |
| 73 | |
| 74 // Same as semantic(), but do create a new scope | |
| 75 | |
| 76 Statement *Statement::semanticScope(Scope *sc, Statement *sbreak, Statement *scontinue) | |
| 77 { Scope *scd; | |
| 78 Statement *s; | |
| 79 | |
| 80 scd = sc->push(); | |
| 81 if (sbreak) | |
| 82 scd->sbreak = sbreak; | |
| 83 if (scontinue) | |
| 84 scd->scontinue = scontinue; | |
| 85 s = semantic(scd); | |
| 86 scd->pop(); | |
| 87 return s; | |
| 88 } | |
| 89 | |
| 90 void Statement::error(const char *format, ...) | |
| 91 { | |
| 92 va_list ap; | |
| 93 va_start(ap, format); | |
| 94 ::verror(loc, format, ap); | |
| 95 va_end( ap ); | |
| 96 } | |
| 97 | |
| 98 int Statement::hasBreak() | |
| 99 { | |
| 100 //printf("Statement::hasBreak()\n"); | |
| 101 return FALSE; | |
| 102 } | |
| 103 | |
| 104 int Statement::hasContinue() | |
| 105 { | |
| 106 return FALSE; | |
| 107 } | |
| 108 | |
| 109 // TRUE if statement uses exception handling | |
| 110 | |
| 111 int Statement::usesEH() | |
| 112 { | |
| 113 return FALSE; | |
| 114 } | |
| 115 | |
| 116 // TRUE if statement may fall off the end without a throw or return | |
| 117 | |
| 118 int Statement::fallOffEnd() | |
| 119 { | |
| 120 return TRUE; | |
| 121 } | |
| 122 | |
| 123 // TRUE if statement 'comes from' somewhere else, like a goto | |
| 124 | |
| 125 int Statement::comeFrom() | |
| 126 { | |
| 127 //printf("Statement::comeFrom()\n"); | |
| 128 return FALSE; | |
| 129 } | |
| 130 | |
| 131 /**************************************** | |
| 132 * If this statement has code that needs to run in a finally clause | |
| 133 * at the end of the current scope, return that code in the form of | |
| 134 * a Statement. | |
| 135 * Output: | |
| 136 * *sentry code executed upon entry to the scope | |
| 137 * *sexception code executed upon exit from the scope via exception | |
| 138 * *sfinally code executed in finally block | |
| 139 */ | |
| 140 | |
| 141 void Statement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 142 { | |
| 143 //printf("Statement::scopeCode()\n"); | |
| 144 //print(); | |
| 145 *sentry = NULL; | |
| 146 *sexception = NULL; | |
| 147 *sfinally = NULL; | |
| 148 } | |
| 149 | |
| 150 /********************************* | |
| 151 * Flatten out the scope by presenting the statement | |
| 152 * as an array of statements. | |
| 153 * Returns NULL if no flattening necessary. | |
| 154 */ | |
| 155 | |
| 156 Statements *Statement::flatten(Scope *sc) | |
| 157 { | |
| 158 return NULL; | |
| 159 } | |
| 160 | |
| 161 | |
| 162 /******************************** ExpStatement ***************************/ | |
| 163 | |
| 164 ExpStatement::ExpStatement(Loc loc, Expression *exp) | |
| 165 : Statement(loc) | |
| 166 { | |
| 167 this->exp = exp; | |
| 168 } | |
| 169 | |
| 170 Statement *ExpStatement::syntaxCopy() | |
| 171 { | |
| 172 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 173 ExpStatement *es = new ExpStatement(loc, e); | |
| 174 return es; | |
| 175 } | |
| 176 | |
| 177 void ExpStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 178 { | |
| 179 if (exp) | |
| 180 exp->toCBuffer(buf, hgs); | |
| 181 buf->writeByte(';'); | |
| 182 if (!hgs->FLinit.init) | |
| 183 buf->writenl(); | |
| 184 } | |
| 185 | |
| 186 Statement *ExpStatement::semantic(Scope *sc) | |
| 187 { | |
| 188 if (exp) | |
| 189 { | |
| 190 //printf("ExpStatement::semantic() %s\n", exp->toChars()); | |
| 191 exp = exp->semantic(sc); | |
| 192 exp = resolveProperties(sc, exp); | |
| 193 exp->checkSideEffect(0); | |
| 194 exp = exp->optimize(0); | |
| 195 //exp = exp->optimize(isDeclarationStatement() ? WANTvalue : 0); | |
| 196 } | |
| 197 return this; | |
| 198 } | |
| 199 | |
| 200 int ExpStatement::fallOffEnd() | |
| 201 { | |
| 202 if (exp) | |
| 203 { | |
| 204 if (exp->op == TOKassert) | |
| 205 { AssertExp *a = (AssertExp *)exp; | |
| 206 | |
| 207 if (a->e1->isBool(FALSE)) // if it's an assert(0) | |
| 208 return FALSE; | |
| 209 } | |
| 210 else if (exp->op == TOKhalt) | |
| 211 return FALSE; | |
| 212 } | |
| 213 return TRUE; | |
| 214 } | |
| 215 | |
| 216 /******************************** CompileStatement ***************************/ | |
| 217 | |
| 218 CompileStatement::CompileStatement(Loc loc, Expression *exp) | |
| 219 : Statement(loc) | |
| 220 { | |
| 221 this->exp = exp; | |
| 222 } | |
| 223 | |
| 224 Statement *CompileStatement::syntaxCopy() | |
| 225 { | |
| 226 Expression *e = exp->syntaxCopy(); | |
| 227 CompileStatement *es = new CompileStatement(loc, e); | |
| 228 return es; | |
| 229 } | |
| 230 | |
| 231 void CompileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 232 { | |
| 233 buf->writestring("mixin("); | |
| 234 exp->toCBuffer(buf, hgs); | |
| 235 buf->writestring(");"); | |
| 236 if (!hgs->FLinit.init) | |
| 237 buf->writenl(); | |
| 238 } | |
| 239 | |
| 240 Statement *CompileStatement::semantic(Scope *sc) | |
| 241 { | |
| 242 //printf("CompileStatement::semantic() %s\n", exp->toChars()); | |
| 243 exp = exp->semantic(sc); | |
| 244 exp = resolveProperties(sc, exp); | |
| 245 exp = exp->optimize(WANTvalue | WANTinterpret); | |
| 246 if (exp->op != TOKstring) | |
| 247 { error("argument to mixin must be a string, not (%s)", exp->toChars()); | |
| 248 return this; | |
| 249 } | |
| 250 StringExp *se = (StringExp *)exp; | |
| 251 se = se->toUTF8(sc); | |
| 252 Parser p(sc->module, (unsigned char *)se->string, se->len, 0); | |
| 253 p.loc = loc; | |
| 254 p.nextToken(); | |
| 255 | |
| 256 Statements *statements = new Statements(); | |
| 257 while (p.token.value != TOKeof) | |
| 258 { | |
| 259 Statement *s = p.parseStatement(PSsemi | PScurlyscope); | |
| 260 statements->push(s); | |
| 261 } | |
| 262 | |
| 263 Statement *s = new CompoundStatement(loc, statements); | |
| 264 return s->semantic(sc); | |
| 265 } | |
| 266 | |
| 267 | |
| 268 /******************************** DeclarationStatement ***************************/ | |
| 269 | |
| 270 DeclarationStatement::DeclarationStatement(Loc loc, Dsymbol *declaration) | |
| 271 : ExpStatement(loc, new DeclarationExp(loc, declaration)) | |
| 272 { | |
| 273 } | |
| 274 | |
| 275 DeclarationStatement::DeclarationStatement(Loc loc, Expression *exp) | |
| 276 : ExpStatement(loc, exp) | |
| 277 { | |
| 278 } | |
| 279 | |
| 280 Statement *DeclarationStatement::syntaxCopy() | |
| 281 { | |
| 282 DeclarationStatement *ds = new DeclarationStatement(loc, exp->syntaxCopy()); | |
| 283 return ds; | |
| 284 } | |
| 285 | |
| 286 void DeclarationStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 287 { | |
| 288 //printf("DeclarationStatement::scopeCode()\n"); | |
| 289 //print(); | |
| 290 | |
| 291 *sentry = NULL; | |
| 292 *sexception = NULL; | |
| 293 *sfinally = NULL; | |
| 294 | |
| 295 if (exp) | |
| 296 { | |
| 297 if (exp->op == TOKdeclaration) | |
| 298 { | |
| 299 DeclarationExp *de = (DeclarationExp *)(exp); | |
| 300 VarDeclaration *v = de->declaration->isVarDeclaration(); | |
| 301 if (v) | |
| 302 { Expression *e; | |
| 303 | |
| 304 e = v->callAutoDtor(); | |
| 305 if (e) | |
| 306 { | |
| 307 //printf("dtor is: "); e->print(); | |
| 308 *sfinally = new ExpStatement(loc, e); | |
| 309 } | |
| 310 } | |
| 311 } | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 void DeclarationStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 316 { | |
| 317 exp->toCBuffer(buf, hgs); | |
| 318 } | |
| 319 | |
| 320 | |
| 321 /******************************** CompoundStatement ***************************/ | |
| 322 | |
| 323 CompoundStatement::CompoundStatement(Loc loc, Statements *s) | |
| 324 : Statement(loc) | |
| 325 { | |
| 326 statements = s; | |
| 327 } | |
| 328 | |
| 329 CompoundStatement::CompoundStatement(Loc loc, Statement *s1, Statement *s2) | |
| 330 : Statement(loc) | |
| 331 { | |
| 332 statements = new Statements(); | |
| 333 statements->reserve(2); | |
| 334 statements->push(s1); | |
| 335 statements->push(s2); | |
| 336 } | |
| 337 | |
| 338 Statement *CompoundStatement::syntaxCopy() | |
| 339 { | |
| 340 Statements *a = new Statements(); | |
| 341 a->setDim(statements->dim); | |
| 342 for (size_t i = 0; i < statements->dim; i++) | |
| 343 { Statement *s = (Statement *)statements->data[i]; | |
| 344 if (s) | |
| 345 s = s->syntaxCopy(); | |
| 346 a->data[i] = s; | |
| 347 } | |
| 348 CompoundStatement *cs = new CompoundStatement(loc, a); | |
| 349 return cs; | |
| 350 } | |
| 351 | |
| 352 | |
| 353 Statement *CompoundStatement::semantic(Scope *sc) | |
| 354 { Statement *s; | |
| 355 | |
| 356 //printf("CompoundStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
| 357 | |
| 358 for (size_t i = 0; i < statements->dim; ) | |
| 359 { | |
| 360 s = (Statement *) statements->data[i]; | |
| 361 if (s) | |
| 362 { Statements *a = s->flatten(sc); | |
| 363 | |
| 364 if (a) | |
| 365 { | |
| 366 statements->remove(i); | |
| 367 statements->insert(i, a); | |
| 368 continue; | |
| 369 } | |
| 370 s = s->semantic(sc); | |
| 371 statements->data[i] = s; | |
| 372 if (s) | |
| 373 { | |
| 374 Statement *sentry; | |
| 375 Statement *sexception; | |
| 376 Statement *sfinally; | |
| 377 | |
| 378 s->scopeCode(&sentry, &sexception, &sfinally); | |
| 379 if (sentry) | |
| 380 { | |
| 381 sentry = sentry->semantic(sc); | |
| 382 statements->data[i] = sentry; | |
| 383 } | |
| 384 if (sexception) | |
| 385 { | |
| 386 if (i + 1 == statements->dim && !sfinally) | |
| 387 { | |
| 388 #if 1 | |
| 389 sexception = sexception->semantic(sc); | |
| 390 #else | |
| 391 statements->push(sexception); | |
| 392 if (sfinally) | |
| 393 // Assume sexception does not throw | |
| 394 statements->push(sfinally); | |
| 395 #endif | |
| 396 } | |
| 397 else | |
| 398 { | |
| 399 /* Rewrite: | |
| 400 * s; s1; s2; | |
| 401 * As: | |
| 402 * s; | |
| 403 * try { s1; s2; } | |
| 404 * catch (Object __o) | |
| 405 * { sexception; throw __o; } | |
| 406 */ | |
| 407 Statement *body; | |
| 408 Statements *a = new Statements(); | |
| 409 | |
| 410 for (int j = i + 1; j < statements->dim; j++) | |
| 411 { | |
| 412 a->push(statements->data[j]); | |
| 413 } | |
| 414 body = new CompoundStatement(0, a); | |
| 415 body = new ScopeStatement(0, body); | |
| 416 | |
| 417 static int num; | |
| 418 char name[3 + sizeof(num) * 3 + 1]; | |
| 419 sprintf(name, "__o%d", ++num); | |
| 420 Identifier *id = Lexer::idPool(name); | |
| 421 | |
| 422 Statement *handler = new ThrowStatement(0, new IdentifierExp(0, id)); | |
| 423 handler = new CompoundStatement(0, sexception, handler); | |
| 424 | |
| 425 Array *catches = new Array(); | |
| 426 Catch *ctch = new Catch(0, NULL, id, handler); | |
| 427 catches->push(ctch); | |
| 428 s = new TryCatchStatement(0, body, catches); | |
| 429 | |
| 430 if (sfinally) | |
| 431 s = new TryFinallyStatement(0, s, sfinally); | |
| 432 s = s->semantic(sc); | |
| 433 statements->setDim(i + 1); | |
| 434 statements->push(s); | |
| 435 break; | |
| 436 } | |
| 437 } | |
| 438 else if (sfinally) | |
| 439 { | |
| 440 if (0 && i + 1 == statements->dim) | |
| 441 { | |
| 442 statements->push(sfinally); | |
| 443 } | |
| 444 else | |
| 445 { | |
| 446 /* Rewrite: | |
| 447 * s; s1; s2; | |
| 448 * As: | |
| 449 * s; try { s1; s2; } finally { sfinally; } | |
| 450 */ | |
| 451 Statement *body; | |
| 452 Statements *a = new Statements(); | |
| 453 | |
| 454 for (int j = i + 1; j < statements->dim; j++) | |
| 455 { | |
| 456 a->push(statements->data[j]); | |
| 457 } | |
| 458 body = new CompoundStatement(0, a); | |
| 459 s = new TryFinallyStatement(0, body, sfinally); | |
| 460 s = s->semantic(sc); | |
| 461 statements->setDim(i + 1); | |
| 462 statements->push(s); | |
| 463 break; | |
| 464 } | |
| 465 } | |
| 466 } | |
| 467 } | |
| 468 i++; | |
| 469 } | |
|
232
092468448d25
[svn r248] Fixed: labels in inline asm block now work for the normal case.
lindquist
parents:
215
diff
changeset
|
470 if (statements->dim == 1 && !isAsmBlockStatement()) |
| 159 | 471 return s; |
| 472 return this; | |
| 473 } | |
| 474 | |
| 475 Statements *CompoundStatement::flatten(Scope *sc) | |
| 476 { | |
| 477 return statements; | |
| 478 } | |
| 479 | |
| 480 ReturnStatement *CompoundStatement::isReturnStatement() | |
| 481 { int i; | |
| 482 ReturnStatement *rs = NULL; | |
| 483 | |
| 484 for (i = 0; i < statements->dim; i++) | |
| 485 { Statement *s; | |
| 486 | |
| 487 s = (Statement *) statements->data[i]; | |
| 488 if (s) | |
| 489 { | |
| 490 rs = s->isReturnStatement(); | |
| 491 if (rs) | |
| 492 break; | |
| 493 } | |
| 494 } | |
| 495 return rs; | |
| 496 } | |
| 497 | |
| 498 void CompoundStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 499 { int i; | |
| 500 | |
| 501 for (i = 0; i < statements->dim; i++) | |
| 502 { Statement *s; | |
| 503 | |
| 504 s = (Statement *) statements->data[i]; | |
| 505 if (s) | |
| 506 s->toCBuffer(buf, hgs); | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 int CompoundStatement::usesEH() | |
| 511 { | |
| 512 for (int i = 0; i < statements->dim; i++) | |
| 513 { Statement *s; | |
| 514 | |
| 515 s = (Statement *) statements->data[i]; | |
| 516 if (s && s->usesEH()) | |
| 517 return TRUE; | |
| 518 } | |
| 519 return FALSE; | |
| 520 } | |
| 521 | |
| 522 int CompoundStatement::fallOffEnd() | |
| 523 { int falloff = TRUE; | |
| 524 | |
| 525 //printf("CompoundStatement::fallOffEnd() %s\n", toChars()); | |
| 526 for (int i = 0; i < statements->dim; i++) | |
| 527 { Statement *s = (Statement *)statements->data[i]; | |
| 528 | |
| 529 if (!s) | |
| 530 continue; | |
| 531 | |
| 532 if (!falloff && global.params.warnings && !s->comeFrom()) | |
| 533 { | |
|
215
a58d8f4b84df
[svn r231] Changed: warnings are no longer treated as an error.
lindquist
parents:
159
diff
changeset
|
534 warning("%s: statement is not reachable", s->loc.toChars()); |
| 159 | 535 } |
| 536 falloff = s->fallOffEnd(); | |
| 537 } | |
| 538 return falloff; | |
| 539 } | |
| 540 | |
| 541 int CompoundStatement::comeFrom() | |
| 542 { int comefrom = FALSE; | |
| 543 | |
| 544 //printf("CompoundStatement::comeFrom()\n"); | |
| 545 for (int i = 0; i < statements->dim; i++) | |
| 546 { Statement *s = (Statement *)statements->data[i]; | |
| 547 | |
| 548 if (!s) | |
| 549 continue; | |
| 550 | |
| 551 comefrom |= s->comeFrom(); | |
| 552 } | |
| 553 return comefrom; | |
| 554 } | |
| 555 | |
| 556 | |
| 557 /**************************** UnrolledLoopStatement ***************************/ | |
| 558 | |
| 559 UnrolledLoopStatement::UnrolledLoopStatement(Loc loc, Statements *s) | |
| 560 : Statement(loc) | |
| 561 { | |
| 562 statements = s; | |
| 563 enclosingtryfinally = NULL; | |
| 564 } | |
| 565 | |
| 566 Statement *UnrolledLoopStatement::syntaxCopy() | |
| 567 { | |
| 568 Statements *a = new Statements(); | |
| 569 a->setDim(statements->dim); | |
| 570 for (size_t i = 0; i < statements->dim; i++) | |
| 571 { Statement *s = (Statement *)statements->data[i]; | |
| 572 if (s) | |
| 573 s = s->syntaxCopy(); | |
| 574 a->data[i] = s; | |
| 575 } | |
| 576 UnrolledLoopStatement *cs = new UnrolledLoopStatement(loc, a); | |
| 577 return cs; | |
| 578 } | |
| 579 | |
| 580 | |
| 581 Statement *UnrolledLoopStatement::semantic(Scope *sc) | |
| 582 { | |
| 583 //printf("UnrolledLoopStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
| 584 | |
| 585 enclosingtryfinally = sc->tfOfTry; | |
| 586 | |
| 587 sc->noctor++; | |
| 588 Scope *scd = sc->push(); | |
| 589 scd->sbreak = this; | |
| 590 scd->scontinue = this; | |
| 591 | |
| 592 for (size_t i = 0; i < statements->dim; i++) | |
| 593 { | |
| 594 Statement *s = (Statement *) statements->data[i]; | |
| 595 if (s) | |
| 596 { | |
| 597 s = s->semantic(scd); | |
| 598 statements->data[i] = s; | |
| 599 } | |
| 600 } | |
| 601 | |
| 602 scd->pop(); | |
| 603 sc->noctor--; | |
| 604 return this; | |
| 605 } | |
| 606 | |
| 607 void UnrolledLoopStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 608 { | |
| 609 buf->writestring("unrolled {"); | |
| 610 buf->writenl(); | |
| 611 | |
| 612 for (size_t i = 0; i < statements->dim; i++) | |
| 613 { Statement *s; | |
| 614 | |
| 615 s = (Statement *) statements->data[i]; | |
| 616 if (s) | |
| 617 s->toCBuffer(buf, hgs); | |
| 618 } | |
| 619 | |
| 620 buf->writeByte('}'); | |
| 621 buf->writenl(); | |
| 622 } | |
| 623 | |
| 624 int UnrolledLoopStatement::hasBreak() | |
| 625 { | |
| 626 return TRUE; | |
| 627 } | |
| 628 | |
| 629 int UnrolledLoopStatement::hasContinue() | |
| 630 { | |
| 631 return TRUE; | |
| 632 } | |
| 633 | |
| 634 int UnrolledLoopStatement::usesEH() | |
| 635 { | |
| 636 for (size_t i = 0; i < statements->dim; i++) | |
| 637 { Statement *s; | |
| 638 | |
| 639 s = (Statement *) statements->data[i]; | |
| 640 if (s && s->usesEH()) | |
| 641 return TRUE; | |
| 642 } | |
| 643 return FALSE; | |
| 644 } | |
| 645 | |
| 646 int UnrolledLoopStatement::fallOffEnd() | |
| 647 { | |
| 648 //printf("UnrolledLoopStatement::fallOffEnd()\n"); | |
| 649 for (size_t i = 0; i < statements->dim; i++) | |
| 650 { Statement *s = (Statement *)statements->data[i]; | |
| 651 | |
| 652 if (s) | |
| 653 s->fallOffEnd(); | |
| 654 } | |
| 655 return TRUE; | |
| 656 } | |
| 657 | |
| 658 | |
| 659 int UnrolledLoopStatement::comeFrom() | |
| 660 { int comefrom = FALSE; | |
| 661 | |
| 662 //printf("UnrolledLoopStatement::comeFrom()\n"); | |
| 663 for (size_t i = 0; i < statements->dim; i++) | |
| 664 { Statement *s = (Statement *)statements->data[i]; | |
| 665 | |
| 666 if (!s) | |
| 667 continue; | |
| 668 | |
| 669 comefrom |= s->comeFrom(); | |
| 670 } | |
| 671 return comefrom; | |
| 672 } | |
| 673 | |
| 674 | |
| 675 /******************************** ScopeStatement ***************************/ | |
| 676 | |
| 677 ScopeStatement::ScopeStatement(Loc loc, Statement *s) | |
| 678 : Statement(loc) | |
| 679 { | |
| 680 this->statement = s; | |
| 681 } | |
| 682 | |
| 683 Statement *ScopeStatement::syntaxCopy() | |
| 684 { | |
| 685 Statement *s; | |
| 686 | |
| 687 s = statement ? statement->syntaxCopy() : NULL; | |
| 688 s = new ScopeStatement(loc, s); | |
| 689 return s; | |
| 690 } | |
| 691 | |
| 692 | |
| 693 Statement *ScopeStatement::semantic(Scope *sc) | |
| 694 { ScopeDsymbol *sym; | |
| 695 | |
| 696 //printf("ScopeStatement::semantic(sc = %p)\n", sc); | |
| 697 if (statement) | |
| 698 { Statements *a; | |
| 699 | |
| 700 sym = new ScopeDsymbol(); | |
| 701 sym->parent = sc->scopesym; | |
| 702 sc = sc->push(sym); | |
| 703 | |
| 704 a = statement->flatten(sc); | |
| 705 if (a) | |
| 706 { | |
| 707 statement = new CompoundStatement(loc, a); | |
| 708 } | |
| 709 | |
| 710 statement = statement->semantic(sc); | |
| 711 if (statement) | |
| 712 { | |
| 713 Statement *sentry; | |
| 714 Statement *sexception; | |
| 715 Statement *sfinally; | |
| 716 | |
| 717 statement->scopeCode(&sentry, &sexception, &sfinally); | |
| 718 if (sfinally) | |
| 719 { | |
| 720 //printf("adding sfinally\n"); | |
| 721 statement = new CompoundStatement(loc, statement, sfinally); | |
| 722 } | |
| 723 } | |
| 724 | |
| 725 sc->pop(); | |
| 726 } | |
| 727 return this; | |
| 728 } | |
| 729 | |
| 730 int ScopeStatement::hasBreak() | |
| 731 { | |
| 732 //printf("ScopeStatement::hasBreak() %s\n", toChars()); | |
| 733 return statement ? statement->hasBreak() : FALSE; | |
| 734 } | |
| 735 | |
| 736 int ScopeStatement::hasContinue() | |
| 737 { | |
| 738 return statement ? statement->hasContinue() : FALSE; | |
| 739 } | |
| 740 | |
| 741 int ScopeStatement::usesEH() | |
| 742 { | |
| 743 return statement ? statement->usesEH() : FALSE; | |
| 744 } | |
| 745 | |
| 746 int ScopeStatement::fallOffEnd() | |
| 747 { | |
| 748 return statement ? statement->fallOffEnd() : TRUE; | |
| 749 } | |
| 750 | |
| 751 int ScopeStatement::comeFrom() | |
| 752 { | |
| 753 //printf("ScopeStatement::comeFrom()\n"); | |
| 754 return statement ? statement->comeFrom() : FALSE; | |
| 755 } | |
| 756 | |
| 757 void ScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 758 { | |
| 759 buf->writeByte('{'); | |
| 760 buf->writenl(); | |
| 761 | |
| 762 if (statement) | |
| 763 statement->toCBuffer(buf, hgs); | |
| 764 | |
| 765 buf->writeByte('}'); | |
| 766 buf->writenl(); | |
| 767 } | |
| 768 | |
| 769 /******************************** WhileStatement ***************************/ | |
| 770 | |
| 771 WhileStatement::WhileStatement(Loc loc, Expression *c, Statement *b) | |
| 772 : Statement(loc) | |
| 773 { | |
| 774 condition = c; | |
| 775 body = b; | |
| 776 enclosingtryfinally = NULL; | |
| 777 } | |
| 778 | |
| 779 Statement *WhileStatement::syntaxCopy() | |
| 780 { | |
| 781 WhileStatement *s = new WhileStatement(loc, condition->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
| 782 return s; | |
| 783 } | |
| 784 | |
| 785 | |
| 786 Statement *WhileStatement::semantic(Scope *sc) | |
| 787 { | |
| 788 #if 0 | |
| 789 if (condition->op == TOKmatch) | |
| 790 { | |
| 791 /* Rewrite while (condition) body as: | |
| 792 * if (condition) | |
| 793 * do | |
| 794 * body | |
| 795 * while ((_match = _match.opNext), _match); | |
| 796 */ | |
| 797 | |
| 798 Expression *ew = new IdentifierExp(0, Id::_match); | |
| 799 ew = new DotIdExp(0, ew, Id::next); | |
| 800 ew = new AssignExp(0, new IdentifierExp(0, Id::_match), ew); | |
| 801 ////ew = new EqualExp(TOKnotequal, 0, ew, new NullExp(0)); | |
| 802 Expression *ev = new IdentifierExp(0, Id::_match); | |
| 803 //ev = new CastExp(0, ev, Type::tvoidptr); | |
| 804 ew = new CommaExp(0, ew, ev); | |
| 805 Statement *sw = new DoStatement(loc, body, ew); | |
| 806 Statement *si = new IfStatement(loc, condition, sw, NULL); | |
| 807 return si->semantic(sc); | |
| 808 } | |
| 809 #endif | |
| 810 | |
| 811 enclosingtryfinally = sc->tfOfTry; | |
| 812 | |
| 813 condition = condition->semantic(sc); | |
| 814 condition = resolveProperties(sc, condition); | |
| 815 condition = condition->optimize(WANTvalue); | |
| 816 condition = condition->checkToBoolean(); | |
| 817 | |
| 818 sc->noctor++; | |
| 819 | |
| 820 Scope *scd = sc->push(); | |
| 821 scd->sbreak = this; | |
| 822 scd->scontinue = this; | |
| 823 if (body) | |
| 824 body = body->semantic(scd); | |
| 825 scd->pop(); | |
| 826 | |
| 827 sc->noctor--; | |
| 828 | |
| 829 return this; | |
| 830 } | |
| 831 | |
| 832 int WhileStatement::hasBreak() | |
| 833 { | |
| 834 return TRUE; | |
| 835 } | |
| 836 | |
| 837 int WhileStatement::hasContinue() | |
| 838 { | |
| 839 return TRUE; | |
| 840 } | |
| 841 | |
| 842 int WhileStatement::usesEH() | |
| 843 { | |
| 844 return body ? body->usesEH() : 0; | |
| 845 } | |
| 846 | |
| 847 int WhileStatement::fallOffEnd() | |
| 848 { | |
| 849 if (body) | |
| 850 body->fallOffEnd(); | |
| 851 return TRUE; | |
| 852 } | |
| 853 | |
| 854 int WhileStatement::comeFrom() | |
| 855 { | |
| 856 if (body) | |
| 857 return body->comeFrom(); | |
| 858 return FALSE; | |
| 859 } | |
| 860 | |
| 861 void WhileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 862 { | |
| 863 buf->writestring("while ("); | |
| 864 condition->toCBuffer(buf, hgs); | |
| 865 buf->writebyte(')'); | |
| 866 buf->writenl(); | |
| 867 if (body) | |
| 868 body->toCBuffer(buf, hgs); | |
| 869 } | |
| 870 | |
| 871 /******************************** DoStatement ***************************/ | |
| 872 | |
| 873 DoStatement::DoStatement(Loc loc, Statement *b, Expression *c) | |
| 874 : Statement(loc) | |
| 875 { | |
| 876 body = b; | |
| 877 condition = c; | |
| 878 enclosingtryfinally = NULL; | |
| 879 } | |
| 880 | |
| 881 Statement *DoStatement::syntaxCopy() | |
| 882 { | |
| 883 DoStatement *s = new DoStatement(loc, body ? body->syntaxCopy() : NULL, condition->syntaxCopy()); | |
| 884 return s; | |
| 885 } | |
| 886 | |
| 887 | |
| 888 Statement *DoStatement::semantic(Scope *sc) | |
| 889 { | |
| 890 enclosingtryfinally = sc->tfOfTry; | |
| 891 | |
| 892 sc->noctor++; | |
| 893 if (body) | |
| 894 body = body->semanticScope(sc, this, this); | |
| 895 sc->noctor--; | |
| 896 condition = condition->semantic(sc); | |
| 897 condition = resolveProperties(sc, condition); | |
| 898 condition = condition->optimize(WANTvalue); | |
| 899 | |
| 900 condition = condition->checkToBoolean(); | |
| 901 | |
| 902 return this; | |
| 903 } | |
| 904 | |
| 905 int DoStatement::hasBreak() | |
| 906 { | |
| 907 return TRUE; | |
| 908 } | |
| 909 | |
| 910 int DoStatement::hasContinue() | |
| 911 { | |
| 912 return TRUE; | |
| 913 } | |
| 914 | |
| 915 int DoStatement::usesEH() | |
| 916 { | |
| 917 return body ? body->usesEH() : 0; | |
| 918 } | |
| 919 | |
| 920 int DoStatement::fallOffEnd() | |
| 921 { | |
| 922 if (body) | |
| 923 body->fallOffEnd(); | |
| 924 return TRUE; | |
| 925 } | |
| 926 | |
| 927 int DoStatement::comeFrom() | |
| 928 { | |
| 929 if (body) | |
| 930 return body->comeFrom(); | |
| 931 return FALSE; | |
| 932 } | |
| 933 | |
| 934 void DoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 935 { | |
| 936 buf->writestring("do"); | |
| 937 buf->writenl(); | |
| 938 if (body) | |
| 939 body->toCBuffer(buf, hgs); | |
| 940 buf->writestring("while ("); | |
| 941 condition->toCBuffer(buf, hgs); | |
| 942 buf->writebyte(')'); | |
| 943 } | |
| 944 | |
| 945 /******************************** ForStatement ***************************/ | |
| 946 | |
| 947 ForStatement::ForStatement(Loc loc, Statement *init, Expression *condition, Expression *increment, Statement *body) | |
| 948 : Statement(loc) | |
| 949 { | |
| 950 this->init = init; | |
| 951 this->condition = condition; | |
| 952 this->increment = increment; | |
| 953 this->body = body; | |
| 954 this->enclosingtryfinally = NULL; | |
| 955 } | |
| 956 | |
| 957 Statement *ForStatement::syntaxCopy() | |
| 958 { | |
| 959 Statement *i = NULL; | |
| 960 if (init) | |
| 961 i = init->syntaxCopy(); | |
| 962 Expression *c = NULL; | |
| 963 if (condition) | |
| 964 c = condition->syntaxCopy(); | |
| 965 Expression *inc = NULL; | |
| 966 if (increment) | |
| 967 inc = increment->syntaxCopy(); | |
| 968 ForStatement *s = new ForStatement(loc, i, c, inc, body->syntaxCopy()); | |
| 969 return s; | |
| 970 } | |
| 971 | |
| 972 Statement *ForStatement::semantic(Scope *sc) | |
| 973 { | |
| 974 enclosingtryfinally = sc->tfOfTry; | |
| 975 | |
| 976 ScopeDsymbol *sym = new ScopeDsymbol(); | |
| 977 sym->parent = sc->scopesym; | |
| 978 sc = sc->push(sym); | |
| 979 if (init) | |
| 980 init = init->semantic(sc); | |
| 981 if (!condition) | |
| 982 // Use a default value | |
| 983 condition = new IntegerExp(loc, 1, Type::tboolean); | |
| 984 sc->noctor++; | |
| 985 condition = condition->semantic(sc); | |
| 986 condition = resolveProperties(sc, condition); | |
| 987 condition = condition->optimize(WANTvalue); | |
| 988 condition = condition->checkToBoolean(); | |
| 989 if (increment) | |
| 990 increment = increment->semantic(sc); | |
| 991 | |
| 992 sc->sbreak = this; | |
| 993 sc->scontinue = this; | |
| 994 body = body->semantic(sc); | |
| 995 sc->noctor--; | |
| 996 | |
| 997 sc->pop(); | |
| 998 return this; | |
| 999 } | |
| 1000 | |
| 1001 void ForStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 1002 { | |
| 1003 //printf("ForStatement::scopeCode()\n"); | |
| 1004 //print(); | |
| 1005 if (init) | |
| 1006 init->scopeCode(sentry, sexception, sfinally); | |
| 1007 else | |
| 1008 Statement::scopeCode(sentry, sexception, sfinally); | |
| 1009 } | |
| 1010 | |
| 1011 int ForStatement::hasBreak() | |
| 1012 { | |
| 1013 //printf("ForStatement::hasBreak()\n"); | |
| 1014 return TRUE; | |
| 1015 } | |
| 1016 | |
| 1017 int ForStatement::hasContinue() | |
| 1018 { | |
| 1019 return TRUE; | |
| 1020 } | |
| 1021 | |
| 1022 int ForStatement::usesEH() | |
| 1023 { | |
| 1024 return (init && init->usesEH()) || body->usesEH(); | |
| 1025 } | |
| 1026 | |
| 1027 int ForStatement::fallOffEnd() | |
| 1028 { | |
| 1029 if (body) | |
| 1030 body->fallOffEnd(); | |
| 1031 return TRUE; | |
| 1032 } | |
| 1033 | |
| 1034 int ForStatement::comeFrom() | |
| 1035 { | |
| 1036 //printf("ForStatement::comeFrom()\n"); | |
| 1037 if (body) | |
| 1038 { int result = body->comeFrom(); | |
| 1039 //printf("result = %d\n", result); | |
| 1040 return result; | |
| 1041 } | |
| 1042 return FALSE; | |
| 1043 } | |
| 1044 | |
| 1045 void ForStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1046 { | |
| 1047 buf->writestring("for ("); | |
| 1048 if (init) | |
| 1049 { | |
| 1050 hgs->FLinit.init++; | |
| 1051 hgs->FLinit.decl = 0; | |
| 1052 init->toCBuffer(buf, hgs); | |
| 1053 if (hgs->FLinit.decl > 0) | |
| 1054 buf->writebyte(';'); | |
| 1055 hgs->FLinit.decl = 0; | |
| 1056 hgs->FLinit.init--; | |
| 1057 } | |
| 1058 else | |
| 1059 buf->writebyte(';'); | |
| 1060 if (condition) | |
| 1061 { buf->writebyte(' '); | |
| 1062 condition->toCBuffer(buf, hgs); | |
| 1063 } | |
| 1064 buf->writebyte(';'); | |
| 1065 if (increment) | |
| 1066 { buf->writebyte(' '); | |
| 1067 increment->toCBuffer(buf, hgs); | |
| 1068 } | |
| 1069 buf->writebyte(')'); | |
| 1070 buf->writenl(); | |
| 1071 buf->writebyte('{'); | |
| 1072 buf->writenl(); | |
| 1073 body->toCBuffer(buf, hgs); | |
| 1074 buf->writebyte('}'); | |
| 1075 buf->writenl(); | |
| 1076 } | |
| 1077 | |
| 1078 /******************************** ForeachStatement ***************************/ | |
| 1079 | |
| 1080 ForeachStatement::ForeachStatement(Loc loc, enum TOK op, Arguments *arguments, | |
| 1081 Expression *aggr, Statement *body) | |
| 1082 : Statement(loc) | |
| 1083 { | |
| 1084 this->op = op; | |
| 1085 this->arguments = arguments; | |
| 1086 this->aggr = aggr; | |
| 1087 this->body = body; | |
| 1088 this->enclosingtryfinally = NULL; | |
| 1089 | |
| 1090 this->key = NULL; | |
| 1091 this->value = NULL; | |
| 1092 | |
| 1093 this->func = NULL; | |
| 1094 } | |
| 1095 | |
| 1096 Statement *ForeachStatement::syntaxCopy() | |
| 1097 { | |
| 1098 Arguments *args = Argument::arraySyntaxCopy(arguments); | |
| 1099 Expression *exp = aggr->syntaxCopy(); | |
| 1100 ForeachStatement *s = new ForeachStatement(loc, op, args, exp, | |
| 1101 body ? body->syntaxCopy() : NULL); | |
| 1102 return s; | |
| 1103 } | |
| 1104 | |
| 1105 Statement *ForeachStatement::semantic(Scope *sc) | |
| 1106 { | |
| 1107 //printf("ForeachStatement::semantic() %p\n", this); | |
| 1108 ScopeDsymbol *sym; | |
| 1109 Statement *s = this; | |
| 1110 int dim = arguments->dim; | |
| 1111 int i; | |
| 1112 TypeAArray *taa = NULL; | |
| 1113 | |
| 1114 Type *tn = NULL; | |
| 1115 Type *tnv = NULL; | |
| 1116 | |
| 1117 enclosingtryfinally = sc->tfOfTry; | |
| 1118 | |
| 1119 func = sc->func; | |
| 1120 if (func->fes) | |
| 1121 func = func->fes->func; | |
| 1122 | |
| 1123 aggr = aggr->semantic(sc); | |
| 1124 aggr = resolveProperties(sc, aggr); | |
| 1125 if (!aggr->type) | |
| 1126 { | |
| 1127 error("invalid foreach aggregate %s", aggr->toChars()); | |
| 1128 return this; | |
| 1129 } | |
| 1130 | |
| 1131 inferApplyArgTypes(op, arguments, aggr); | |
| 1132 | |
| 1133 /* Check for inference errors | |
| 1134 */ | |
| 1135 if (dim != arguments->dim) | |
| 1136 { | |
| 1137 //printf("dim = %d, arguments->dim = %d\n", dim, arguments->dim); | |
| 1138 error("cannot uniquely infer foreach argument types"); | |
| 1139 return this; | |
| 1140 } | |
| 1141 | |
| 1142 Type *tab = aggr->type->toBasetype(); | |
| 1143 | |
| 1144 if (tab->ty == Ttuple) // don't generate new scope for tuple loops | |
| 1145 { | |
| 1146 if (dim < 1 || dim > 2) | |
| 1147 { | |
| 1148 error("only one (value) or two (key,value) arguments for tuple foreach"); | |
| 1149 return s; | |
| 1150 } | |
| 1151 | |
| 1152 TypeTuple *tuple = (TypeTuple *)tab; | |
| 1153 Statements *statements = new Statements(); | |
| 1154 //printf("aggr: op = %d, %s\n", aggr->op, aggr->toChars()); | |
| 1155 size_t n; | |
| 1156 TupleExp *te = NULL; | |
| 1157 if (aggr->op == TOKtuple) // expression tuple | |
| 1158 { te = (TupleExp *)aggr; | |
| 1159 n = te->exps->dim; | |
| 1160 } | |
| 1161 else if (aggr->op == TOKtype) // type tuple | |
| 1162 { | |
| 1163 n = Argument::dim(tuple->arguments); | |
| 1164 } | |
| 1165 else | |
| 1166 assert(0); | |
| 1167 for (size_t j = 0; j < n; j++) | |
| 1168 { size_t k = (op == TOKforeach) ? j : n - 1 - j; | |
| 1169 Expression *e; | |
| 1170 Type *t; | |
| 1171 if (te) | |
| 1172 e = (Expression *)te->exps->data[k]; | |
| 1173 else | |
| 1174 t = Argument::getNth(tuple->arguments, k)->type; | |
| 1175 Argument *arg = (Argument *)arguments->data[0]; | |
| 1176 Statements *st = new Statements(); | |
| 1177 | |
| 1178 if (dim == 2) | |
| 1179 { // Declare key | |
| 1180 if (arg->storageClass & (STCout | STCref | STClazy)) | |
| 1181 error("no storage class for key %s", arg->ident->toChars()); | |
| 1182 TY keyty = arg->type->ty; | |
| 1183 if ((keyty != Tint32 && keyty != Tuns32) && | |
| 1184 (global.params.is64bit && keyty != Tint64 && keyty != Tuns64) | |
| 1185 ) | |
| 1186 { | |
| 1187 error("foreach: key type must be %s, not %s", global.params.is64bit ? "int, uint, long or ulong" : "int or uint",arg->type->toChars()); | |
| 1188 } | |
| 1189 Initializer *ie = new ExpInitializer(0, new IntegerExp(k)); | |
| 1190 VarDeclaration *var = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
| 1191 var->storage_class |= STCconst; | |
| 1192 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1193 st->push(new ExpStatement(loc, de)); | |
| 1194 arg = (Argument *)arguments->data[1]; // value | |
| 1195 } | |
| 1196 // Declare value | |
| 1197 if (arg->storageClass & (STCout | STCref | STClazy)) | |
| 1198 error("no storage class for value %s", arg->ident->toChars()); | |
| 1199 Dsymbol *var; | |
| 1200 if (te) | |
| 1201 { | |
| 1202 if (e->type->toBasetype()->ty == Tfunction && | |
| 1203 e->op == TOKvar) | |
| 1204 { VarExp *ve = (VarExp *)e; | |
| 1205 var = new AliasDeclaration(loc, arg->ident, ve->var); | |
| 1206 } | |
| 1207 else | |
| 1208 { | |
| 1209 arg->type = e->type; | |
| 1210 Initializer *ie = new ExpInitializer(0, e); | |
| 1211 VarDeclaration *v = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
| 1212 if (e->isConst()) | |
| 1213 v->storage_class |= STCconst; | |
| 1214 #if V2 | |
| 1215 else | |
| 1216 v->storage_class |= STCfinal; | |
| 1217 #endif | |
| 1218 var = v; | |
| 1219 } | |
| 1220 } | |
| 1221 else | |
| 1222 { | |
| 1223 var = new AliasDeclaration(loc, arg->ident, t); | |
| 1224 } | |
| 1225 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1226 st->push(new ExpStatement(loc, de)); | |
| 1227 | |
| 1228 st->push(body->syntaxCopy()); | |
| 1229 s = new CompoundStatement(loc, st); | |
| 1230 s = new ScopeStatement(loc, s); | |
| 1231 statements->push(s); | |
| 1232 } | |
| 1233 | |
| 1234 s = new UnrolledLoopStatement(loc, statements); | |
| 1235 s = s->semantic(sc); | |
| 1236 return s; | |
| 1237 } | |
| 1238 | |
| 1239 for (i = 0; i < dim; i++) | |
| 1240 { Argument *arg = (Argument *)arguments->data[i]; | |
| 1241 if (!arg->type) | |
| 1242 { | |
| 1243 error("cannot infer type for %s", arg->ident->toChars()); | |
| 1244 return this; | |
| 1245 } | |
| 1246 } | |
| 1247 | |
| 1248 sym = new ScopeDsymbol(); | |
| 1249 sym->parent = sc->scopesym; | |
| 1250 sc = sc->push(sym); | |
| 1251 | |
| 1252 sc->noctor++; | |
| 1253 | |
| 1254 switch (tab->ty) | |
| 1255 { | |
| 1256 case Tarray: | |
| 1257 case Tsarray: | |
| 1258 if (dim < 1 || dim > 2) | |
| 1259 { | |
| 1260 error("only one or two arguments for array foreach"); | |
| 1261 break; | |
| 1262 } | |
| 1263 | |
| 1264 /* Look for special case of parsing char types out of char type | |
| 1265 * array. | |
| 1266 */ | |
| 1267 tn = tab->nextOf()->toBasetype(); | |
| 1268 if (tn->ty == Tchar || tn->ty == Twchar || tn->ty == Tdchar) | |
| 1269 { Argument *arg; | |
| 1270 | |
| 1271 i = (dim == 1) ? 0 : 1; // index of value | |
| 1272 arg = (Argument *)arguments->data[i]; | |
| 1273 arg->type = arg->type->semantic(loc, sc); | |
| 1274 tnv = arg->type->toBasetype(); | |
| 1275 if (tnv->ty != tn->ty && | |
| 1276 (tnv->ty == Tchar || tnv->ty == Twchar || tnv->ty == Tdchar)) | |
| 1277 { | |
| 1278 if (arg->storageClass & STCref) | |
| 1279 error("foreach: value of UTF conversion cannot be ref"); | |
| 1280 if (dim == 2) | |
| 1281 { arg = (Argument *)arguments->data[0]; | |
| 1282 if (arg->storageClass & STCref) | |
| 1283 error("foreach: key cannot be ref"); | |
| 1284 } | |
| 1285 goto Lapply; | |
| 1286 } | |
| 1287 } | |
| 1288 | |
| 1289 for (i = 0; i < dim; i++) | |
| 1290 { // Declare args | |
| 1291 Argument *arg = (Argument *)arguments->data[i]; | |
| 1292 VarDeclaration *var; | |
| 1293 | |
| 1294 var = new VarDeclaration(loc, arg->type, arg->ident, NULL); | |
| 1295 var->storage_class |= STCforeach; | |
| 1296 var->storage_class |= arg->storageClass & (STCin | STCout | STCref); | |
| 1297 #if 1 | |
| 1298 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1299 de->semantic(sc); | |
| 1300 #else | |
| 1301 var->semantic(sc); | |
| 1302 if (!sc->insert(var)) | |
| 1303 error("%s already defined", var->ident->toChars()); | |
| 1304 #endif | |
| 1305 if (dim == 2 && i == 0) | |
| 1306 key = var; | |
| 1307 else | |
| 1308 value = var; | |
| 1309 } | |
| 1310 | |
| 1311 sc->sbreak = this; | |
| 1312 sc->scontinue = this; | |
| 1313 body = body->semantic(sc); | |
| 1314 | |
| 1315 if (!value->type->equals(tab->next)) | |
| 1316 { | |
| 1317 if (aggr->op == TOKstring) | |
| 1318 aggr = aggr->implicitCastTo(sc, value->type->arrayOf()); | |
| 1319 else | |
| 1320 error("foreach: %s is not an array of %s", tab->toChars(), value->type->toChars()); | |
| 1321 } | |
| 1322 | |
| 1323 if (key && | |
| 1324 ((key->type->ty != Tint32 && key->type->ty != Tuns32) && | |
| 1325 (global.params.is64bit && key->type->ty != Tint64 && key->type->ty != Tuns64) | |
| 1326 ) | |
| 1327 ) | |
| 1328 { | |
| 1329 error("foreach: key type must be %s, not %s", global.params.is64bit ? "int, uint, long or ulong" : "int or uint", key->type->toChars()); | |
| 1330 } | |
| 1331 | |
| 1332 if (key && key->storage_class & (STCout | STCref)) | |
| 1333 error("foreach: key cannot be out or ref"); | |
| 1334 break; | |
| 1335 | |
| 1336 case Taarray: | |
| 1337 taa = (TypeAArray *)tab; | |
| 1338 if (dim < 1 || dim > 2) | |
| 1339 { | |
| 1340 error("only one or two arguments for associative array foreach"); | |
| 1341 break; | |
| 1342 } | |
| 1343 if (op == TOKforeach_reverse) | |
| 1344 { | |
| 1345 error("no reverse iteration on associative arrays"); | |
| 1346 } | |
| 1347 goto Lapply; | |
| 1348 | |
| 1349 case Tclass: | |
| 1350 case Tstruct: | |
| 1351 case Tdelegate: | |
| 1352 Lapply: | |
| 1353 { FuncDeclaration *fdapply; | |
| 1354 Arguments *args; | |
| 1355 Expression *ec; | |
| 1356 Expression *e; | |
| 1357 FuncLiteralDeclaration *fld; | |
| 1358 Argument *a; | |
| 1359 Type *t; | |
| 1360 Expression *flde; | |
| 1361 Identifier *id; | |
| 1362 Type *tret; | |
| 1363 | |
| 1364 tret = func->type->nextOf(); | |
| 1365 | |
| 1366 // Need a variable to hold value from any return statements in body. | |
| 1367 if (!sc->func->vresult && tret && tret != Type::tvoid) | |
| 1368 { VarDeclaration *v; | |
| 1369 | |
| 1370 v = new VarDeclaration(loc, tret, Id::result, NULL); | |
| 1371 v->noauto = 1; | |
| 1372 v->semantic(sc); | |
| 1373 if (!sc->insert(v)) | |
| 1374 assert(0); | |
| 1375 v->parent = sc->func; | |
| 1376 sc->func->vresult = v; | |
| 1377 } | |
| 1378 | |
| 1379 /* Turn body into the function literal: | |
| 1380 * int delegate(ref T arg) { body } | |
| 1381 */ | |
| 1382 args = new Arguments(); | |
| 1383 for (i = 0; i < dim; i++) | |
| 1384 { Argument *arg = (Argument *)arguments->data[i]; | |
| 1385 | |
| 1386 arg->type = arg->type->semantic(loc, sc); | |
| 1387 if (arg->storageClass & STCref) | |
| 1388 id = arg->ident; | |
| 1389 else | |
| 1390 { // Make a copy of the ref argument so it isn't | |
| 1391 // a reference. | |
| 1392 VarDeclaration *v; | |
| 1393 Initializer *ie; | |
| 1394 char applyArg[10 + sizeof(i)*3 + 1]; | |
| 1395 | |
| 1396 sprintf(applyArg, "__applyArg%d", i); | |
| 1397 id = Lexer::idPool(applyArg); | |
| 1398 | |
| 1399 ie = new ExpInitializer(0, new IdentifierExp(0, id)); | |
| 1400 v = new VarDeclaration(0, arg->type, arg->ident, ie); | |
| 1401 s = new DeclarationStatement(0, v); | |
| 1402 body = new CompoundStatement(loc, s, body); | |
| 1403 } | |
| 1404 a = new Argument(STCref, arg->type, id, NULL); | |
| 1405 args->push(a); | |
| 1406 } | |
| 1407 t = new TypeFunction(args, Type::tint32, 0, LINKd); | |
| 1408 fld = new FuncLiteralDeclaration(loc, 0, t, TOKdelegate, this); | |
| 1409 fld->fbody = body; | |
| 1410 flde = new FuncExp(loc, fld); | |
| 1411 flde = flde->semantic(sc); | |
| 1412 | |
| 1413 // Resolve any forward referenced goto's | |
| 1414 for (int i = 0; i < gotos.dim; i++) | |
| 1415 { CompoundStatement *cs = (CompoundStatement *)gotos.data[i]; | |
| 1416 GotoStatement *gs = (GotoStatement *)cs->statements->data[0]; | |
| 1417 | |
| 1418 if (!gs->label->statement) | |
| 1419 { // 'Promote' it to this scope, and replace with a return | |
| 1420 cases.push(gs); | |
| 1421 s = new ReturnStatement(0, new IntegerExp(cases.dim + 1)); | |
| 1422 cs->statements->data[0] = (void *)s; | |
| 1423 } | |
| 1424 } | |
| 1425 | |
| 1426 if (tab->ty == Taarray) | |
| 1427 { | |
| 1428 // Check types | |
| 1429 Argument *arg = (Argument *)arguments->data[0]; | |
| 1430 if (dim == 2) | |
| 1431 { | |
| 1432 if (arg->storageClass & STCref) | |
| 1433 error("foreach: index cannot be ref"); | |
| 1434 if (!arg->type->equals(taa->index)) | |
| 1435 error("foreach: index must be type %s, not %s", taa->index->toChars(), arg->type->toChars()); | |
| 1436 arg = (Argument *)arguments->data[1]; | |
| 1437 } | |
| 1438 if (!arg->type->equals(taa->nextOf())) | |
| 1439 error("foreach: value must be type %s, not %s", taa->nextOf()->toChars(), arg->type->toChars()); | |
| 1440 | |
| 1441 /* Call: | |
| 1442 * _aaApply(aggr, keysize, flde) | |
| 1443 */ | |
| 1444 if (dim == 2) | |
| 1445 fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply2"); | |
| 1446 else | |
| 1447 fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply"); | |
| 1448 fdapply->runTimeHack = true; | |
| 1449 ec = new VarExp(0, fdapply); | |
| 1450 Expressions *exps = new Expressions(); | |
| 1451 exps->push(aggr); | |
| 1452 size_t keysize = taa->key->size(); | |
| 1453 keysize = (keysize + 3) & ~3; | |
| 1454 exps->push(new IntegerExp(0, keysize, Type::tsize_t)); | |
| 1455 exps->push(flde); | |
| 1456 e = new CallExp(loc, ec, exps); | |
| 1457 e->type = Type::tindex; // don't run semantic() on e | |
| 1458 } | |
| 1459 else if (tab->ty == Tarray || tab->ty == Tsarray) | |
| 1460 { | |
| 1461 /* Call: | |
| 1462 * _aApply(aggr, flde) | |
| 1463 */ | |
| 1464 static char fntab[9][3] = | |
| 1465 { "cc","cw","cd", | |
| 1466 "wc","cc","wd", | |
| 1467 "dc","dw","dd" | |
| 1468 }; | |
| 1469 char fdname[7+1+2+ sizeof(dim)*3 + 1]; | |
| 1470 int flag; | |
| 1471 | |
| 1472 switch (tn->ty) | |
| 1473 { | |
| 1474 case Tchar: flag = 0; break; | |
| 1475 case Twchar: flag = 3; break; | |
| 1476 case Tdchar: flag = 6; break; | |
| 1477 default: assert(0); | |
| 1478 } | |
| 1479 switch (tnv->ty) | |
| 1480 { | |
| 1481 case Tchar: flag += 0; break; | |
| 1482 case Twchar: flag += 1; break; | |
| 1483 case Tdchar: flag += 2; break; | |
| 1484 default: assert(0); | |
| 1485 } | |
| 1486 const char *r = (op == TOKforeach_reverse) ? "R" : ""; | |
| 1487 int j = sprintf(fdname, "_aApply%s%.*s%d", r, 2, fntab[flag], dim); | |
| 1488 assert(j < sizeof(fdname)); | |
| 1489 fdapply = FuncDeclaration::genCfunc(Type::tindex, fdname); | |
| 1490 fdapply->runTimeHack = true; | |
| 1491 | |
| 1492 ec = new VarExp(0, fdapply); | |
| 1493 Expressions *exps = new Expressions(); | |
| 1494 if (tab->ty == Tsarray) | |
| 1495 aggr = aggr->castTo(sc, tn->arrayOf()); | |
| 1496 exps->push(aggr); | |
| 1497 exps->push(flde); | |
| 1498 e = new CallExp(loc, ec, exps); | |
| 1499 e->type = Type::tindex; // don't run semantic() on e | |
| 1500 } | |
| 1501 else if (tab->ty == Tdelegate) | |
| 1502 { | |
| 1503 /* Call: | |
| 1504 * aggr(flde) | |
| 1505 */ | |
| 1506 Expressions *exps = new Expressions(); | |
| 1507 exps->push(flde); | |
| 1508 e = new CallExp(loc, aggr, exps); | |
| 1509 e = e->semantic(sc); | |
| 1510 if (e->type != Type::tint32) | |
| 1511 error("opApply() function for %s must return an int", tab->toChars()); | |
| 1512 } | |
| 1513 else | |
| 1514 { | |
| 1515 /* Call: | |
| 1516 * aggr.apply(flde) | |
| 1517 */ | |
| 1518 ec = new DotIdExp(loc, aggr, | |
| 1519 (op == TOKforeach_reverse) ? Id::applyReverse | |
| 1520 : Id::apply); | |
| 1521 Expressions *exps = new Expressions(); | |
| 1522 exps->push(flde); | |
| 1523 e = new CallExp(loc, ec, exps); | |
| 1524 e = e->semantic(sc); | |
| 1525 if (e->type != Type::tint32) | |
| 1526 error("opApply() function for %s must return an int", tab->toChars()); | |
| 1527 } | |
| 1528 | |
| 1529 if (!cases.dim) | |
| 1530 // Easy case, a clean exit from the loop | |
| 1531 s = new ExpStatement(loc, e); | |
| 1532 else | |
| 1533 { // Construct a switch statement around the return value | |
| 1534 // of the apply function. | |
| 1535 Statements *a = new Statements(); | |
| 1536 | |
| 1537 // default: break; takes care of cases 0 and 1 | |
| 1538 s = new BreakStatement(0, NULL); | |
| 1539 s = new DefaultStatement(0, s); | |
| 1540 a->push(s); | |
| 1541 | |
| 1542 // cases 2... | |
| 1543 for (int i = 0; i < cases.dim; i++) | |
| 1544 { | |
| 1545 s = (Statement *)cases.data[i]; | |
| 1546 s = new CaseStatement(0, new IntegerExp(i + 2), s); | |
| 1547 a->push(s); | |
| 1548 } | |
| 1549 | |
| 1550 s = new CompoundStatement(loc, a); | |
| 1551 s = new SwitchStatement(loc, e, s); | |
| 1552 s = s->semantic(sc); | |
| 1553 } | |
| 1554 break; | |
| 1555 } | |
| 1556 | |
| 1557 default: | |
| 1558 error("foreach: %s is not an aggregate type", aggr->type->toChars()); | |
| 1559 break; | |
| 1560 } | |
| 1561 sc->noctor--; | |
| 1562 sc->pop(); | |
| 1563 return s; | |
| 1564 } | |
| 1565 | |
| 1566 int ForeachStatement::hasBreak() | |
| 1567 { | |
| 1568 return TRUE; | |
| 1569 } | |
| 1570 | |
| 1571 int ForeachStatement::hasContinue() | |
| 1572 { | |
| 1573 return TRUE; | |
| 1574 } | |
| 1575 | |
| 1576 int ForeachStatement::usesEH() | |
| 1577 { | |
| 1578 return body->usesEH(); | |
| 1579 } | |
| 1580 | |
| 1581 int ForeachStatement::fallOffEnd() | |
| 1582 { | |
| 1583 if (body) | |
| 1584 body->fallOffEnd(); | |
| 1585 return TRUE; | |
| 1586 } | |
| 1587 | |
| 1588 int ForeachStatement::comeFrom() | |
| 1589 { | |
| 1590 if (body) | |
| 1591 return body->comeFrom(); | |
| 1592 return FALSE; | |
| 1593 } | |
| 1594 | |
| 1595 void ForeachStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1596 { | |
| 1597 buf->writestring(Token::toChars(op)); | |
| 1598 buf->writestring(" ("); | |
| 1599 int i; | |
| 1600 for (int i = 0; i < arguments->dim; i++) | |
| 1601 { | |
| 1602 Argument *a = (Argument *)arguments->data[i]; | |
| 1603 if (i) | |
| 1604 buf->writestring(", "); | |
| 1605 if (a->storageClass & STCref) | |
| 1606 buf->writestring((global.params.Dversion == 1) | |
| 1607 ? (char*)"inout " : (char*)"ref "); | |
| 1608 if (a->type) | |
| 1609 a->type->toCBuffer(buf, a->ident, hgs); | |
| 1610 else | |
| 1611 buf->writestring(a->ident->toChars()); | |
| 1612 } | |
| 1613 buf->writestring("; "); | |
| 1614 aggr->toCBuffer(buf, hgs); | |
| 1615 buf->writebyte(')'); | |
| 1616 buf->writenl(); | |
| 1617 buf->writebyte('{'); | |
| 1618 buf->writenl(); | |
| 1619 if (body) | |
| 1620 body->toCBuffer(buf, hgs); | |
| 1621 buf->writebyte('}'); | |
| 1622 buf->writenl(); | |
| 1623 } | |
| 1624 | |
| 1625 /******************************** IfStatement ***************************/ | |
| 1626 | |
| 1627 IfStatement::IfStatement(Loc loc, Argument *arg, Expression *condition, Statement *ifbody, Statement *elsebody) | |
| 1628 : Statement(loc) | |
| 1629 { | |
| 1630 this->arg = arg; | |
| 1631 this->condition = condition; | |
| 1632 this->ifbody = ifbody; | |
| 1633 this->elsebody = elsebody; | |
| 1634 this->match = NULL; | |
| 1635 } | |
| 1636 | |
| 1637 Statement *IfStatement::syntaxCopy() | |
| 1638 { | |
| 1639 Statement *i = NULL; | |
| 1640 if (ifbody) | |
| 1641 i = ifbody->syntaxCopy(); | |
| 1642 | |
| 1643 Statement *e = NULL; | |
| 1644 if (elsebody) | |
| 1645 e = elsebody->syntaxCopy(); | |
| 1646 | |
| 1647 Argument *a = arg ? arg->syntaxCopy() : NULL; | |
| 1648 IfStatement *s = new IfStatement(loc, a, condition->syntaxCopy(), i, e); | |
| 1649 return s; | |
| 1650 } | |
| 1651 | |
| 1652 Statement *IfStatement::semantic(Scope *sc) | |
| 1653 { | |
| 1654 condition = condition->semantic(sc); | |
| 1655 condition = resolveProperties(sc, condition); | |
| 1656 condition = condition->checkToBoolean(); | |
| 1657 | |
| 1658 // If we can short-circuit evaluate the if statement, don't do the | |
| 1659 // semantic analysis of the skipped code. | |
| 1660 // This feature allows a limited form of conditional compilation. | |
| 1661 condition = condition->optimize(WANTflags); | |
| 1662 | |
| 1663 // Evaluate at runtime | |
| 1664 unsigned cs0 = sc->callSuper; | |
| 1665 unsigned cs1; | |
| 1666 | |
| 1667 Scope *scd; | |
| 1668 if (arg) | |
| 1669 { /* Declare arg, which we will set to be the | |
| 1670 * result of condition. | |
| 1671 */ | |
| 1672 ScopeDsymbol *sym = new ScopeDsymbol(); | |
| 1673 sym->parent = sc->scopesym; | |
| 1674 scd = sc->push(sym); | |
| 1675 | |
| 1676 Type *t = arg->type ? arg->type : condition->type; | |
| 1677 match = new VarDeclaration(loc, t, arg->ident, NULL); | |
| 1678 match->noauto = 1; | |
| 1679 match->semantic(scd); | |
| 1680 if (!scd->insert(match)) | |
| 1681 assert(0); | |
| 1682 match->parent = sc->func; | |
| 1683 | |
| 1684 /* Generate: | |
| 1685 * (arg = condition) | |
| 1686 */ | |
| 1687 VarExp *v = new VarExp(0, match); | |
| 1688 condition = new AssignExp(loc, v, condition); | |
| 1689 condition = condition->semantic(scd); | |
| 1690 } | |
| 1691 else | |
| 1692 scd = sc->push(); | |
| 1693 ifbody = ifbody->semantic(scd); | |
| 1694 scd->pop(); | |
| 1695 | |
| 1696 cs1 = sc->callSuper; | |
| 1697 sc->callSuper = cs0; | |
| 1698 if (elsebody) | |
| 1699 elsebody = elsebody->semanticScope(sc, NULL, NULL); | |
| 1700 sc->mergeCallSuper(loc, cs1); | |
| 1701 | |
| 1702 return this; | |
| 1703 } | |
| 1704 | |
| 1705 int IfStatement::usesEH() | |
| 1706 { | |
| 1707 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
| 1708 } | |
| 1709 | |
| 1710 int IfStatement::fallOffEnd() | |
| 1711 { | |
| 1712 if (!ifbody || ifbody->fallOffEnd() || | |
| 1713 !elsebody || elsebody->fallOffEnd()) | |
| 1714 return TRUE; | |
| 1715 return FALSE; | |
| 1716 } | |
| 1717 | |
| 1718 | |
| 1719 void IfStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1720 { | |
| 1721 buf->writestring("if ("); | |
| 1722 if (arg) | |
| 1723 { | |
| 1724 if (arg->type) | |
| 1725 arg->type->toCBuffer(buf, arg->ident, hgs); | |
| 1726 else | |
| 1727 buf->writestring(arg->ident->toChars()); | |
| 1728 buf->writebyte(';'); | |
| 1729 } | |
| 1730 condition->toCBuffer(buf, hgs); | |
| 1731 buf->writebyte(')'); | |
| 1732 buf->writenl(); | |
| 1733 ifbody->toCBuffer(buf, hgs); | |
| 1734 if (elsebody) | |
| 1735 { buf->writestring("else"); | |
| 1736 buf->writenl(); | |
| 1737 elsebody->toCBuffer(buf, hgs); | |
| 1738 } | |
| 1739 } | |
| 1740 | |
| 1741 /******************************** ConditionalStatement ***************************/ | |
| 1742 | |
| 1743 ConditionalStatement::ConditionalStatement(Loc loc, Condition *condition, Statement *ifbody, Statement *elsebody) | |
| 1744 : Statement(loc) | |
| 1745 { | |
| 1746 this->condition = condition; | |
| 1747 this->ifbody = ifbody; | |
| 1748 this->elsebody = elsebody; | |
| 1749 } | |
| 1750 | |
| 1751 Statement *ConditionalStatement::syntaxCopy() | |
| 1752 { | |
| 1753 Statement *e = NULL; | |
| 1754 if (elsebody) | |
| 1755 e = elsebody->syntaxCopy(); | |
| 1756 ConditionalStatement *s = new ConditionalStatement(loc, | |
| 1757 condition->syntaxCopy(), ifbody->syntaxCopy(), e); | |
| 1758 return s; | |
| 1759 } | |
| 1760 | |
| 1761 Statement *ConditionalStatement::semantic(Scope *sc) | |
| 1762 { | |
| 1763 //printf("ConditionalStatement::semantic()\n"); | |
| 1764 | |
| 1765 // If we can short-circuit evaluate the if statement, don't do the | |
| 1766 // semantic analysis of the skipped code. | |
| 1767 // This feature allows a limited form of conditional compilation. | |
| 1768 if (condition->include(sc, NULL)) | |
| 1769 { | |
| 1770 ifbody = ifbody->semantic(sc); | |
| 1771 return ifbody; | |
| 1772 } | |
| 1773 else | |
| 1774 { | |
| 1775 if (elsebody) | |
| 1776 elsebody = elsebody->semantic(sc); | |
| 1777 return elsebody; | |
| 1778 } | |
| 1779 } | |
| 1780 | |
| 1781 Statements *ConditionalStatement::flatten(Scope *sc) | |
| 1782 { | |
| 1783 Statement *s; | |
| 1784 | |
| 1785 if (condition->include(sc, NULL)) | |
| 1786 s = ifbody; | |
| 1787 else | |
| 1788 s = elsebody; | |
| 1789 | |
| 1790 Statements *a = new Statements(); | |
| 1791 a->push(s); | |
| 1792 return a; | |
| 1793 } | |
| 1794 | |
| 1795 int ConditionalStatement::usesEH() | |
| 1796 { | |
| 1797 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
| 1798 } | |
| 1799 | |
| 1800 void ConditionalStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1801 { | |
| 1802 condition->toCBuffer(buf, hgs); | |
| 1803 buf->writenl(); | |
| 1804 if (ifbody) | |
| 1805 ifbody->toCBuffer(buf, hgs); | |
| 1806 if (elsebody) | |
| 1807 { | |
| 1808 buf->writestring("else"); | |
| 1809 buf->writenl(); | |
| 1810 elsebody->toCBuffer(buf, hgs); | |
| 1811 } | |
| 1812 buf->writenl(); | |
| 1813 } | |
| 1814 | |
| 1815 | |
| 1816 /******************************** PragmaStatement ***************************/ | |
| 1817 | |
| 1818 PragmaStatement::PragmaStatement(Loc loc, Identifier *ident, Expressions *args, Statement *body) | |
| 1819 : Statement(loc) | |
| 1820 { | |
| 1821 this->ident = ident; | |
| 1822 this->args = args; | |
| 1823 this->body = body; | |
| 1824 } | |
| 1825 | |
| 1826 Statement *PragmaStatement::syntaxCopy() | |
| 1827 { | |
| 1828 Statement *b = NULL; | |
| 1829 if (body) | |
| 1830 b = body->syntaxCopy(); | |
| 1831 PragmaStatement *s = new PragmaStatement(loc, | |
| 1832 ident, Expression::arraySyntaxCopy(args), b); | |
| 1833 return s; | |
| 1834 } | |
| 1835 | |
| 1836 Statement *PragmaStatement::semantic(Scope *sc) | |
| 1837 { // Should be merged with PragmaDeclaration | |
| 1838 //printf("PragmaStatement::semantic() %s\n", toChars()); | |
| 1839 //printf("body = %p\n", body); | |
| 1840 if (ident == Id::msg) | |
| 1841 { | |
| 1842 if (args) | |
| 1843 { | |
| 1844 for (size_t i = 0; i < args->dim; i++) | |
| 1845 { | |
| 1846 Expression *e = (Expression *)args->data[i]; | |
| 1847 | |
| 1848 e = e->semantic(sc); | |
| 1849 e = e->optimize(WANTvalue | WANTinterpret); | |
| 1850 if (e->op == TOKstring) | |
| 1851 { | |
| 1852 StringExp *se = (StringExp *)e; | |
| 1853 fprintf(stdmsg, "%.*s", (int)se->len, se->string); | |
| 1854 } | |
| 1855 else | |
| 1856 error("string expected for message, not '%s'", e->toChars()); | |
| 1857 } | |
| 1858 fprintf(stdmsg, "\n"); | |
| 1859 } | |
| 1860 } | |
| 1861 else if (ident == Id::lib) | |
| 1862 { | |
| 1863 if (!args || args->dim != 1) | |
| 1864 error("string expected for library name"); | |
| 1865 else | |
| 1866 { | |
| 1867 Expression *e = (Expression *)args->data[0]; | |
| 1868 | |
| 1869 e = e->semantic(sc); | |
| 1870 e = e->optimize(WANTvalue | WANTinterpret); | |
| 1871 args->data[0] = (void *)e; | |
| 1872 if (e->op != TOKstring) | |
| 1873 error("string expected for library name, not '%s'", e->toChars()); | |
| 1874 else if (global.params.verbose) | |
| 1875 { | |
| 1876 StringExp *se = (StringExp *)e; | |
| 1877 char *name = (char *)mem.malloc(se->len + 1); | |
| 1878 memcpy(name, se->string, se->len); | |
| 1879 name[se->len] = 0; | |
| 1880 printf("library %s\n", name); | |
| 1881 mem.free(name); | |
| 1882 } | |
| 1883 } | |
| 1884 } | |
| 1885 else | |
| 1886 error("unrecognized pragma(%s)", ident->toChars()); | |
| 1887 | |
| 1888 if (body) | |
| 1889 { | |
| 1890 body = body->semantic(sc); | |
| 1891 } | |
| 1892 return body; | |
| 1893 } | |
| 1894 | |
| 1895 int PragmaStatement::usesEH() | |
| 1896 { | |
| 1897 return body && body->usesEH(); | |
| 1898 } | |
| 1899 | |
| 1900 int PragmaStatement::fallOffEnd() | |
| 1901 { | |
| 1902 if (body) | |
| 1903 return body->fallOffEnd(); | |
| 1904 return TRUE; | |
| 1905 } | |
| 1906 | |
| 1907 void PragmaStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1908 { | |
| 1909 buf->writestring("pragma ("); | |
| 1910 buf->writestring(ident->toChars()); | |
| 1911 if (args && args->dim) | |
| 1912 { | |
| 1913 buf->writestring(", "); | |
| 1914 argsToCBuffer(buf, args, hgs); | |
| 1915 } | |
| 1916 buf->writeByte(')'); | |
| 1917 if (body) | |
| 1918 { | |
| 1919 buf->writenl(); | |
| 1920 buf->writeByte('{'); | |
| 1921 buf->writenl(); | |
| 1922 | |
| 1923 body->toCBuffer(buf, hgs); | |
| 1924 | |
| 1925 buf->writeByte('}'); | |
| 1926 buf->writenl(); | |
| 1927 } | |
| 1928 else | |
| 1929 { | |
| 1930 buf->writeByte(';'); | |
| 1931 buf->writenl(); | |
| 1932 } | |
| 1933 } | |
| 1934 | |
| 1935 | |
| 1936 /******************************** StaticAssertStatement ***************************/ | |
| 1937 | |
| 1938 StaticAssertStatement::StaticAssertStatement(StaticAssert *sa) | |
| 1939 : Statement(sa->loc) | |
| 1940 { | |
| 1941 this->sa = sa; | |
| 1942 } | |
| 1943 | |
| 1944 Statement *StaticAssertStatement::syntaxCopy() | |
| 1945 { | |
| 1946 StaticAssertStatement *s = new StaticAssertStatement((StaticAssert *)sa->syntaxCopy(NULL)); | |
| 1947 return s; | |
| 1948 } | |
| 1949 | |
| 1950 Statement *StaticAssertStatement::semantic(Scope *sc) | |
| 1951 { | |
| 1952 sa->semantic2(sc); | |
| 1953 return NULL; | |
| 1954 } | |
| 1955 | |
| 1956 void StaticAssertStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1957 { | |
| 1958 sa->toCBuffer(buf, hgs); | |
| 1959 } | |
| 1960 | |
| 1961 | |
| 1962 /******************************** SwitchStatement ***************************/ | |
| 1963 | |
| 1964 SwitchStatement::SwitchStatement(Loc loc, Expression *c, Statement *b) | |
| 1965 : Statement(loc) | |
| 1966 { | |
| 1967 condition = c; | |
| 1968 body = b; | |
| 1969 sdefault = NULL; | |
| 1970 cases = NULL; | |
| 1971 hasNoDefault = 0; | |
| 1972 // LLVMDC | |
| 1973 enclosingtryfinally = NULL; | |
| 1974 } | |
| 1975 | |
| 1976 Statement *SwitchStatement::syntaxCopy() | |
| 1977 { | |
| 1978 SwitchStatement *s = new SwitchStatement(loc, | |
| 1979 condition->syntaxCopy(), body->syntaxCopy()); | |
| 1980 return s; | |
| 1981 } | |
| 1982 | |
| 1983 Statement *SwitchStatement::semantic(Scope *sc) | |
| 1984 { | |
| 1985 //printf("SwitchStatement::semantic(%p)\n", this); | |
| 1986 assert(!cases); // ensure semantic() is only run once | |
| 1987 | |
| 1988 enclosingtryfinally = sc->tfOfTry; | |
| 1989 | |
| 1990 condition = condition->semantic(sc); | |
| 1991 condition = resolveProperties(sc, condition); | |
| 1992 if (condition->type->isString()) | |
| 1993 { | |
| 1994 // If it's not an array, cast it to one | |
| 1995 if (condition->type->ty != Tarray) | |
| 1996 { | |
| 1997 condition = condition->implicitCastTo(sc, condition->type->nextOf()->arrayOf()); | |
| 1998 } | |
| 1999 } | |
| 2000 else | |
| 2001 { condition = condition->integralPromotions(sc); | |
| 2002 condition->checkIntegral(); | |
| 2003 } | |
| 2004 condition = condition->optimize(WANTvalue); | |
| 2005 | |
| 2006 sc = sc->push(); | |
| 2007 sc->sbreak = this; | |
| 2008 sc->sw = this; | |
| 2009 | |
| 2010 cases = new Array(); | |
| 2011 sc->noctor++; // BUG: should use Scope::mergeCallSuper() for each case instead | |
| 2012 body = body->semantic(sc); | |
| 2013 sc->noctor--; | |
| 2014 | |
| 2015 // Resolve any goto case's with exp | |
| 2016 for (int i = 0; i < gotoCases.dim; i++) | |
| 2017 { | |
| 2018 GotoCaseStatement *gcs = (GotoCaseStatement *)gotoCases.data[i]; | |
| 2019 | |
| 2020 if (!gcs->exp) | |
| 2021 { | |
| 2022 gcs->error("no case statement following goto case;"); | |
| 2023 break; | |
| 2024 } | |
| 2025 | |
| 2026 for (Scope *scx = sc; scx; scx = scx->enclosing) | |
| 2027 { | |
| 2028 if (!scx->sw) | |
| 2029 continue; | |
| 2030 for (int j = 0; j < scx->sw->cases->dim; j++) | |
| 2031 { | |
| 2032 CaseStatement *cs = (CaseStatement *)scx->sw->cases->data[j]; | |
| 2033 | |
| 2034 if (cs->exp->equals(gcs->exp)) | |
| 2035 { | |
| 2036 gcs->cs = cs; | |
| 2037 goto Lfoundcase; | |
| 2038 } | |
| 2039 } | |
| 2040 } | |
| 2041 gcs->error("case %s not found", gcs->exp->toChars()); | |
| 2042 | |
| 2043 Lfoundcase: | |
| 2044 ; | |
| 2045 } | |
| 2046 | |
| 2047 if (!sc->sw->sdefault) | |
| 2048 { hasNoDefault = 1; | |
| 2049 | |
| 2050 if (global.params.warnings) | |
|
215
a58d8f4b84df
[svn r231] Changed: warnings are no longer treated as an error.
lindquist
parents:
159
diff
changeset
|
2051 { warning("%s: switch statement has no default", loc.toChars()); |
| 159 | 2052 } |
| 2053 | |
| 2054 // Generate runtime error if the default is hit | |
| 2055 Statements *a = new Statements(); | |
| 2056 CompoundStatement *cs; | |
| 2057 Statement *s; | |
| 2058 | |
| 2059 if (global.params.useSwitchError) | |
| 2060 s = new SwitchErrorStatement(loc); | |
| 2061 else | |
| 2062 { Expression *e = new HaltExp(loc); | |
| 2063 s = new ExpStatement(loc, e); | |
| 2064 } | |
| 2065 | |
| 2066 a->reserve(4); | |
| 2067 a->push(body); | |
| 2068 a->push(new BreakStatement(loc, NULL)); | |
| 2069 sc->sw->sdefault = new DefaultStatement(loc, s); | |
| 2070 a->push(sc->sw->sdefault); | |
| 2071 cs = new CompoundStatement(loc, a); | |
| 2072 body = cs; | |
| 2073 } | |
| 2074 | |
| 2075 sc->pop(); | |
| 2076 return this; | |
| 2077 } | |
| 2078 | |
| 2079 int SwitchStatement::hasBreak() | |
| 2080 { | |
| 2081 return TRUE; | |
| 2082 } | |
| 2083 | |
| 2084 int SwitchStatement::usesEH() | |
| 2085 { | |
| 2086 return body ? body->usesEH() : 0; | |
| 2087 } | |
| 2088 | |
| 2089 int SwitchStatement::fallOffEnd() | |
| 2090 { | |
| 2091 if (body) | |
| 2092 body->fallOffEnd(); | |
| 2093 return TRUE; // need to do this better | |
| 2094 } | |
| 2095 | |
| 2096 void SwitchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2097 { | |
| 2098 buf->writestring("switch ("); | |
| 2099 condition->toCBuffer(buf, hgs); | |
| 2100 buf->writebyte(')'); | |
| 2101 buf->writenl(); | |
| 2102 if (body) | |
| 2103 { | |
| 2104 if (!body->isScopeStatement()) | |
| 2105 { buf->writebyte('{'); | |
| 2106 buf->writenl(); | |
| 2107 body->toCBuffer(buf, hgs); | |
| 2108 buf->writebyte('}'); | |
| 2109 buf->writenl(); | |
| 2110 } | |
| 2111 else | |
| 2112 { | |
| 2113 body->toCBuffer(buf, hgs); | |
| 2114 } | |
| 2115 } | |
| 2116 } | |
| 2117 | |
| 2118 /******************************** CaseStatement ***************************/ | |
| 2119 | |
| 2120 CaseStatement::CaseStatement(Loc loc, Expression *exp, Statement *s) | |
| 2121 : Statement(loc) | |
| 2122 { | |
| 2123 this->exp = exp; | |
| 2124 this->statement = s; | |
| 2125 cblock = NULL; | |
| 2126 bodyBB = NULL; | |
|
262
88252a1af660
[svn r280] Fixed a bunch of issues with switch statements. Ended up a bit far reaching...
lindquist
parents:
232
diff
changeset
|
2127 llvmIdx = NULL; |
| 159 | 2128 } |
| 2129 | |
| 2130 Statement *CaseStatement::syntaxCopy() | |
| 2131 { | |
| 2132 CaseStatement *s = new CaseStatement(loc, exp->syntaxCopy(), statement->syntaxCopy()); | |
| 2133 return s; | |
| 2134 } | |
| 2135 | |
| 2136 Statement *CaseStatement::semantic(Scope *sc) | |
| 2137 { SwitchStatement *sw = sc->sw; | |
| 2138 | |
| 2139 //printf("CaseStatement::semantic() %s\n", toChars()); | |
| 2140 exp = exp->semantic(sc); | |
| 2141 if (sw) | |
| 2142 { int i; | |
| 2143 | |
| 2144 exp = exp->implicitCastTo(sc, sw->condition->type); | |
| 2145 exp = exp->optimize(WANTvalue | WANTinterpret); | |
| 2146 if (exp->op != TOKstring && exp->op != TOKint64) | |
| 2147 { | |
| 2148 error("case must be a string or an integral constant, not %s", exp->toChars()); | |
| 2149 exp = new IntegerExp(0); | |
| 2150 } | |
| 2151 | |
| 2152 for (i = 0; i < sw->cases->dim; i++) | |
| 2153 { | |
| 2154 CaseStatement *cs = (CaseStatement *)sw->cases->data[i]; | |
| 2155 | |
| 2156 //printf("comparing '%s' with '%s'\n", exp->toChars(), cs->exp->toChars()); | |
| 2157 if (cs->exp->equals(exp)) | |
| 2158 { error("duplicate case %s in switch statement", exp->toChars()); | |
| 2159 break; | |
| 2160 } | |
| 2161 } | |
| 2162 | |
| 2163 sw->cases->push(this); | |
| 2164 | |
| 2165 // Resolve any goto case's with no exp to this case statement | |
| 2166 for (i = 0; i < sw->gotoCases.dim; i++) | |
| 2167 { | |
| 2168 GotoCaseStatement *gcs = (GotoCaseStatement *)sw->gotoCases.data[i]; | |
| 2169 | |
| 2170 if (!gcs->exp) | |
| 2171 { | |
| 2172 gcs->cs = this; | |
| 2173 sw->gotoCases.remove(i); // remove from array | |
| 2174 } | |
| 2175 } | |
| 2176 } | |
| 2177 else | |
| 2178 error("case not in switch statement"); | |
| 2179 statement = statement->semantic(sc); | |
| 2180 return this; | |
| 2181 } | |
| 2182 | |
| 2183 int CaseStatement::compare(Object *obj) | |
| 2184 { | |
| 2185 // Sort cases so we can do an efficient lookup | |
| 2186 CaseStatement *cs2 = (CaseStatement *)(obj); | |
| 2187 | |
| 2188 return exp->compare(cs2->exp); | |
| 2189 } | |
| 2190 | |
| 2191 int CaseStatement::usesEH() | |
| 2192 { | |
| 2193 return statement->usesEH(); | |
| 2194 } | |
| 2195 | |
| 2196 int CaseStatement::fallOffEnd() | |
| 2197 { | |
| 2198 return statement->fallOffEnd(); | |
| 2199 } | |
| 2200 | |
| 2201 int CaseStatement::comeFrom() | |
| 2202 { | |
| 2203 return TRUE; | |
| 2204 } | |
| 2205 | |
| 2206 void CaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2207 { | |
| 2208 buf->writestring("case "); | |
| 2209 exp->toCBuffer(buf, hgs); | |
| 2210 buf->writebyte(':'); | |
| 2211 buf->writenl(); | |
| 2212 statement->toCBuffer(buf, hgs); | |
| 2213 } | |
| 2214 | |
| 2215 /******************************** DefaultStatement ***************************/ | |
| 2216 | |
| 2217 DefaultStatement::DefaultStatement(Loc loc, Statement *s) | |
| 2218 : Statement(loc) | |
| 2219 { | |
| 2220 this->statement = s; | |
| 2221 #if IN_GCC | |
| 2222 + cblock = NULL; | |
| 2223 #endif | |
| 2224 bodyBB = NULL; | |
| 2225 } | |
| 2226 | |
| 2227 Statement *DefaultStatement::syntaxCopy() | |
| 2228 { | |
| 2229 DefaultStatement *s = new DefaultStatement(loc, statement->syntaxCopy()); | |
| 2230 return s; | |
| 2231 } | |
| 2232 | |
| 2233 Statement *DefaultStatement::semantic(Scope *sc) | |
| 2234 { | |
| 2235 if (sc->sw) | |
| 2236 { | |
| 2237 if (sc->sw->sdefault) | |
| 2238 { | |
| 2239 error("switch statement already has a default"); | |
| 2240 } | |
| 2241 sc->sw->sdefault = this; | |
| 2242 } | |
| 2243 else | |
| 2244 error("default not in switch statement"); | |
| 2245 statement = statement->semantic(sc); | |
| 2246 return this; | |
| 2247 } | |
| 2248 | |
| 2249 int DefaultStatement::usesEH() | |
| 2250 { | |
| 2251 return statement->usesEH(); | |
| 2252 } | |
| 2253 | |
| 2254 int DefaultStatement::fallOffEnd() | |
| 2255 { | |
| 2256 return statement->fallOffEnd(); | |
| 2257 } | |
| 2258 | |
| 2259 int DefaultStatement::comeFrom() | |
| 2260 { | |
| 2261 return TRUE; | |
| 2262 } | |
| 2263 | |
| 2264 void DefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2265 { | |
| 2266 buf->writestring("default:\n"); | |
| 2267 statement->toCBuffer(buf, hgs); | |
| 2268 } | |
| 2269 | |
| 2270 /******************************** GotoDefaultStatement ***************************/ | |
| 2271 | |
| 2272 GotoDefaultStatement::GotoDefaultStatement(Loc loc) | |
| 2273 : Statement(loc) | |
| 2274 { | |
| 2275 sw = NULL; | |
| 2276 enclosingtryfinally = NULL; | |
| 2277 } | |
| 2278 | |
| 2279 Statement *GotoDefaultStatement::syntaxCopy() | |
| 2280 { | |
| 2281 GotoDefaultStatement *s = new GotoDefaultStatement(loc); | |
| 2282 return s; | |
| 2283 } | |
| 2284 | |
| 2285 Statement *GotoDefaultStatement::semantic(Scope *sc) | |
| 2286 { | |
| 2287 enclosingtryfinally = sc->tfOfTry; | |
| 2288 sw = sc->sw; | |
| 2289 if (!sw) | |
| 2290 error("goto default not in switch statement"); | |
| 2291 return this; | |
| 2292 } | |
| 2293 | |
| 2294 int GotoDefaultStatement::fallOffEnd() | |
| 2295 { | |
| 2296 return FALSE; | |
| 2297 } | |
| 2298 | |
| 2299 void GotoDefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2300 { | |
| 2301 buf->writestring("goto default;\n"); | |
| 2302 } | |
| 2303 | |
| 2304 /******************************** GotoCaseStatement ***************************/ | |
| 2305 | |
| 2306 GotoCaseStatement::GotoCaseStatement(Loc loc, Expression *exp) | |
| 2307 : Statement(loc) | |
| 2308 { | |
| 2309 cs = NULL; | |
| 2310 this->exp = exp; | |
| 2311 enclosingtryfinally = NULL; | |
| 2312 sw = NULL; | |
| 2313 } | |
| 2314 | |
| 2315 Statement *GotoCaseStatement::syntaxCopy() | |
| 2316 { | |
| 2317 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 2318 GotoCaseStatement *s = new GotoCaseStatement(loc, e); | |
| 2319 return s; | |
| 2320 } | |
| 2321 | |
| 2322 Statement *GotoCaseStatement::semantic(Scope *sc) | |
| 2323 { | |
| 2324 enclosingtryfinally = sc->tfOfTry; | |
| 2325 if (exp) | |
| 2326 exp = exp->semantic(sc); | |
| 2327 | |
| 2328 if (!sc->sw) | |
| 2329 error("goto case not in switch statement"); | |
| 2330 else | |
| 2331 { | |
| 2332 sw = sc->sw; | |
| 2333 sc->sw->gotoCases.push(this); | |
| 2334 if (exp) | |
| 2335 { | |
| 2336 exp = exp->implicitCastTo(sc, sc->sw->condition->type); | |
| 2337 exp = exp->optimize(WANTvalue); | |
| 2338 } | |
| 2339 } | |
| 2340 return this; | |
| 2341 } | |
| 2342 | |
| 2343 int GotoCaseStatement::fallOffEnd() | |
| 2344 { | |
| 2345 return FALSE; | |
| 2346 } | |
| 2347 | |
| 2348 void GotoCaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2349 { | |
| 2350 buf->writestring("goto case"); | |
| 2351 if (exp) | |
| 2352 { buf->writebyte(' '); | |
| 2353 exp->toCBuffer(buf, hgs); | |
| 2354 } | |
| 2355 buf->writebyte(';'); | |
| 2356 buf->writenl(); | |
| 2357 } | |
| 2358 | |
| 2359 /******************************** SwitchErrorStatement ***************************/ | |
| 2360 | |
| 2361 SwitchErrorStatement::SwitchErrorStatement(Loc loc) | |
| 2362 : Statement(loc) | |
| 2363 { | |
| 2364 } | |
| 2365 | |
| 2366 int SwitchErrorStatement::fallOffEnd() | |
| 2367 { | |
| 2368 return FALSE; | |
| 2369 } | |
| 2370 | |
| 2371 void SwitchErrorStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2372 { | |
| 2373 buf->writestring("SwitchErrorStatement::toCBuffer()"); | |
| 2374 buf->writenl(); | |
| 2375 } | |
| 2376 | |
| 2377 /******************************** ReturnStatement ***************************/ | |
| 2378 | |
| 2379 ReturnStatement::ReturnStatement(Loc loc, Expression *exp) | |
| 2380 : Statement(loc) | |
| 2381 { | |
| 2382 this->exp = exp; | |
| 2383 this->enclosingtryfinally = NULL; | |
| 2384 } | |
| 2385 | |
| 2386 Statement *ReturnStatement::syntaxCopy() | |
| 2387 { | |
| 2388 Expression *e = NULL; | |
| 2389 if (exp) | |
| 2390 e = exp->syntaxCopy(); | |
| 2391 ReturnStatement *s = new ReturnStatement(loc, e); | |
| 2392 return s; | |
| 2393 } | |
| 2394 | |
| 2395 Statement *ReturnStatement::semantic(Scope *sc) | |
| 2396 { | |
| 2397 //printf("ReturnStatement::semantic() %s\n", toChars()); | |
| 2398 this->enclosingtryfinally = sc->tfOfTry; | |
| 2399 | |
| 2400 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 2401 Scope *scx = sc; | |
| 2402 int implicit0 = 0; | |
| 2403 | |
| 2404 if (sc->fes) | |
| 2405 { | |
| 2406 // Find scope of function foreach is in | |
| 2407 for (; 1; scx = scx->enclosing) | |
| 2408 { | |
| 2409 assert(scx); | |
| 2410 if (scx->func != fd) | |
| 2411 { fd = scx->func; // fd is now function enclosing foreach | |
| 2412 break; | |
| 2413 } | |
| 2414 } | |
| 2415 } | |
| 2416 | |
| 2417 Type *tret = fd->type->nextOf(); | |
| 2418 if (fd->tintro) | |
| 2419 tret = fd->tintro->nextOf(); | |
| 2420 Type *tbret = NULL; | |
| 2421 | |
| 2422 if (tret) | |
| 2423 tbret = tret->toBasetype(); | |
| 2424 | |
| 2425 // main() returns 0, even if it returns void | |
| 2426 if (!exp && (!tbret || tbret->ty == Tvoid) && fd->isMain()) | |
| 2427 { implicit0 = 1; | |
| 2428 exp = new IntegerExp(0); | |
| 2429 } | |
| 2430 | |
| 2431 if (sc->incontract || scx->incontract) | |
| 2432 error("return statements cannot be in contracts"); | |
| 2433 if (sc->tf || scx->tf) | |
| 2434 error("return statements cannot be in finally, scope(exit) or scope(success) bodies"); | |
| 2435 | |
| 2436 if (fd->isCtorDeclaration()) | |
| 2437 { | |
| 2438 // Constructors implicitly do: | |
| 2439 // return this; | |
| 2440 if (exp && exp->op != TOKthis) | |
| 2441 error("cannot return expression from constructor"); | |
| 2442 exp = new ThisExp(0); | |
| 2443 } | |
| 2444 | |
| 2445 if (!exp) | |
| 2446 fd->nrvo_can = 0; | |
| 2447 | |
| 2448 if (exp) | |
| 2449 { | |
| 2450 fd->hasReturnExp |= 1; | |
| 2451 | |
| 2452 exp = exp->semantic(sc); | |
| 2453 exp = resolveProperties(sc, exp); | |
| 2454 exp = exp->optimize(WANTvalue); | |
| 2455 | |
| 2456 if (fd->nrvo_can && exp->op == TOKvar) | |
| 2457 { VarExp *ve = (VarExp *)exp; | |
| 2458 VarDeclaration *v = ve->var->isVarDeclaration(); | |
| 2459 | |
| 2460 if (!v || v->isOut() || v->isRef()) | |
| 2461 fd->nrvo_can = 0; | |
| 2462 else if (fd->nrvo_var == NULL) | |
| 2463 { if (!v->isDataseg() && !v->isParameter() && v->toParent2() == fd) | |
| 2464 fd->nrvo_var = v; | |
| 2465 else | |
| 2466 fd->nrvo_can = 0; | |
| 2467 } | |
| 2468 else if (fd->nrvo_var != v) | |
| 2469 fd->nrvo_can = 0; | |
| 2470 } | |
| 2471 else | |
| 2472 fd->nrvo_can = 0; | |
| 2473 | |
| 2474 if (fd->returnLabel && tbret->ty != Tvoid) | |
| 2475 { | |
| 2476 } | |
| 2477 else if (fd->inferRetType) | |
| 2478 { | |
| 2479 if (fd->type->nextOf()) | |
| 2480 { | |
| 2481 if (!exp->type->equals(fd->type->nextOf())) | |
| 2482 error("mismatched function return type inference of %s and %s", | |
| 2483 exp->type->toChars(), fd->type->nextOf()->toChars()); | |
| 2484 } | |
| 2485 else | |
| 2486 { | |
| 2487 fd->type->next = exp->type; | |
| 2488 fd->type = fd->type->semantic(loc, sc); | |
| 2489 if (!fd->tintro) | |
| 2490 { tret = fd->type->nextOf(); | |
| 2491 tbret = tret->toBasetype(); | |
| 2492 } | |
| 2493 } | |
| 2494 } | |
| 2495 else if (tbret->ty != Tvoid) | |
| 2496 { | |
| 2497 exp = exp->implicitCastTo(sc, tret); | |
| 2498 } | |
| 2499 } | |
| 2500 else if (fd->inferRetType) | |
| 2501 { | |
| 2502 if (fd->type->nextOf()) | |
| 2503 { | |
| 2504 if (fd->type->nextOf()->ty != Tvoid) | |
| 2505 error("mismatched function return type inference of void and %s", | |
| 2506 fd->type->nextOf()->toChars()); | |
| 2507 } | |
| 2508 else | |
| 2509 { | |
| 2510 fd->type->next = Type::tvoid; | |
| 2511 fd->type = fd->type->semantic(loc, sc); | |
| 2512 if (!fd->tintro) | |
| 2513 { tret = Type::tvoid; | |
| 2514 tbret = tret; | |
| 2515 } | |
| 2516 } | |
| 2517 } | |
| 2518 else if (tbret->ty != Tvoid) // if non-void return | |
| 2519 error("return expression expected"); | |
| 2520 | |
| 2521 if (sc->fes) | |
| 2522 { | |
| 2523 Statement *s; | |
| 2524 | |
| 2525 if (exp && !implicit0) | |
| 2526 { | |
| 2527 exp = exp->implicitCastTo(sc, tret); | |
| 2528 } | |
| 2529 if (!exp || exp->op == TOKint64 || exp->op == TOKfloat64 || | |
| 2530 exp->op == TOKimaginary80 || exp->op == TOKcomplex80 || | |
| 2531 exp->op == TOKthis || exp->op == TOKsuper || exp->op == TOKnull || | |
| 2532 exp->op == TOKstring) | |
| 2533 { | |
| 2534 sc->fes->cases.push(this); | |
| 2535 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2536 } | |
| 2537 else if (fd->type->nextOf()->toBasetype() == Type::tvoid) | |
| 2538 { | |
| 2539 Statement *s1; | |
| 2540 Statement *s2; | |
| 2541 | |
| 2542 s = new ReturnStatement(0, NULL); | |
| 2543 sc->fes->cases.push(s); | |
| 2544 | |
| 2545 // Construct: { exp; return cases.dim + 1; } | |
| 2546 s1 = new ExpStatement(loc, exp); | |
| 2547 s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2548 s = new CompoundStatement(loc, s1, s2); | |
| 2549 } | |
| 2550 else | |
| 2551 { | |
| 2552 VarExp *v; | |
| 2553 Statement *s1; | |
| 2554 Statement *s2; | |
| 2555 | |
| 2556 // Construct: return vresult; | |
| 2557 if (!fd->vresult) | |
| 2558 { VarDeclaration *v; | |
| 2559 | |
| 2560 v = new VarDeclaration(loc, tret, Id::result, NULL); | |
| 2561 v->noauto = 1; | |
| 2562 v->semantic(scx); | |
| 2563 if (!scx->insert(v)) | |
| 2564 assert(0); | |
| 2565 v->parent = fd; | |
| 2566 fd->vresult = v; | |
| 2567 } | |
| 2568 | |
| 2569 v = new VarExp(0, fd->vresult); | |
| 2570 s = new ReturnStatement(0, v); | |
| 2571 sc->fes->cases.push(s); | |
| 2572 | |
| 2573 // Construct: { vresult = exp; return cases.dim + 1; } | |
| 2574 v = new VarExp(0, fd->vresult); | |
| 2575 exp = new AssignExp(loc, v, exp); | |
| 2576 exp = exp->semantic(sc); | |
| 2577 s1 = new ExpStatement(loc, exp); | |
| 2578 s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2579 s = new CompoundStatement(loc, s1, s2); | |
| 2580 } | |
| 2581 return s; | |
| 2582 } | |
| 2583 | |
| 2584 if (exp) | |
| 2585 { | |
| 2586 if (fd->returnLabel && tbret->ty != Tvoid) | |
| 2587 { | |
| 2588 assert(fd->vresult); | |
| 2589 VarExp *v = new VarExp(0, fd->vresult); | |
| 2590 | |
| 2591 exp = new AssignExp(loc, v, exp); | |
| 2592 exp = exp->semantic(sc); | |
| 2593 } | |
| 2594 //exp->dump(0); | |
| 2595 //exp->print(); | |
| 2596 exp->checkEscape(); | |
| 2597 } | |
| 2598 | |
| 2599 /* BUG: need to issue an error on: | |
| 2600 * this | |
| 2601 * { if (x) return; | |
| 2602 * super(); | |
| 2603 * } | |
| 2604 */ | |
| 2605 | |
| 2606 if (sc->callSuper & CSXany_ctor && | |
| 2607 !(sc->callSuper & (CSXthis_ctor | CSXsuper_ctor))) | |
| 2608 error("return without calling constructor"); | |
| 2609 | |
| 2610 sc->callSuper |= CSXreturn; | |
| 2611 | |
| 2612 // See if all returns are instead to be replaced with a goto returnLabel; | |
| 2613 if (fd->returnLabel) | |
| 2614 { | |
| 2615 GotoStatement *gs = new GotoStatement(loc, Id::returnLabel); | |
| 2616 | |
| 2617 gs->label = fd->returnLabel; | |
| 2618 if (exp) | |
| 2619 { Statement *s; | |
| 2620 | |
| 2621 s = new ExpStatement(0, exp); | |
| 2622 return new CompoundStatement(loc, s, gs); | |
| 2623 } | |
| 2624 return gs; | |
| 2625 } | |
| 2626 | |
| 2627 if (exp && tbret->ty == Tvoid && !fd->isMain()) | |
| 2628 { Statement *s; | |
| 2629 | |
| 2630 s = new ExpStatement(loc, exp); | |
| 2631 loc = 0; | |
| 2632 exp = NULL; | |
| 2633 return new CompoundStatement(loc, s, this); | |
| 2634 } | |
| 2635 | |
| 2636 return this; | |
| 2637 } | |
| 2638 | |
| 2639 int ReturnStatement::fallOffEnd() | |
| 2640 { | |
| 2641 return FALSE; | |
| 2642 } | |
| 2643 | |
| 2644 void ReturnStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2645 { | |
| 2646 buf->printf("return "); | |
| 2647 if (exp) | |
| 2648 exp->toCBuffer(buf, hgs); | |
| 2649 buf->writeByte(';'); | |
| 2650 buf->writenl(); | |
| 2651 } | |
| 2652 | |
| 2653 /******************************** BreakStatement ***************************/ | |
| 2654 | |
| 2655 BreakStatement::BreakStatement(Loc loc, Identifier *ident) | |
| 2656 : Statement(loc) | |
| 2657 { | |
| 2658 this->ident = ident; | |
| 2659 this->enclosingtryfinally = NULL; | |
| 2660 } | |
| 2661 | |
| 2662 Statement *BreakStatement::syntaxCopy() | |
| 2663 { | |
| 2664 BreakStatement *s = new BreakStatement(loc, ident); | |
| 2665 return s; | |
| 2666 } | |
| 2667 | |
| 2668 Statement *BreakStatement::semantic(Scope *sc) | |
| 2669 { | |
| 2670 enclosingtryfinally = sc->tfOfTry; | |
| 2671 // If: | |
| 2672 // break Identifier; | |
| 2673 if (ident) | |
| 2674 { | |
| 2675 Scope *scx; | |
| 2676 FuncDeclaration *thisfunc = sc->func; | |
| 2677 | |
| 2678 for (scx = sc; scx; scx = scx->enclosing) | |
| 2679 { | |
| 2680 LabelStatement *ls; | |
| 2681 | |
| 2682 if (scx->func != thisfunc) // if in enclosing function | |
| 2683 { | |
| 2684 if (sc->fes) // if this is the body of a foreach | |
| 2685 { | |
| 2686 /* Post this statement to the fes, and replace | |
| 2687 * it with a return value that caller will put into | |
| 2688 * a switch. Caller will figure out where the break | |
| 2689 * label actually is. | |
| 2690 * Case numbers start with 2, not 0, as 0 is continue | |
| 2691 * and 1 is break. | |
| 2692 */ | |
| 2693 Statement *s; | |
| 2694 sc->fes->cases.push(this); | |
| 2695 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2696 return s; | |
| 2697 } | |
| 2698 break; // can't break to it | |
| 2699 } | |
| 2700 | |
| 2701 ls = scx->slabel; | |
| 2702 if (ls && ls->ident == ident) | |
| 2703 { | |
| 2704 Statement *s = ls->statement; | |
| 2705 | |
| 2706 if (!s->hasBreak()) | |
| 2707 error("label '%s' has no break", ident->toChars()); | |
| 2708 if (ls->tf != sc->tf) | |
| 2709 error("cannot break out of finally block"); | |
| 2710 | |
| 2711 this->target = ls; | |
| 2712 return this; | |
| 2713 } | |
| 2714 } | |
| 2715 error("enclosing label '%s' for break not found", ident->toChars()); | |
| 2716 } | |
| 2717 else if (!sc->sbreak) | |
| 2718 { | |
| 2719 if (sc->fes) | |
| 2720 { Statement *s; | |
| 2721 | |
| 2722 // Replace break; with return 1; | |
| 2723 s = new ReturnStatement(0, new IntegerExp(1)); | |
| 2724 return s; | |
| 2725 } | |
| 2726 error("break is not inside a loop or switch"); | |
| 2727 } | |
| 2728 return this; | |
| 2729 } | |
| 2730 | |
| 2731 int BreakStatement::fallOffEnd() | |
| 2732 { | |
| 2733 return FALSE; | |
| 2734 } | |
| 2735 | |
| 2736 void BreakStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2737 { | |
| 2738 buf->writestring("break"); | |
| 2739 if (ident) | |
| 2740 { buf->writebyte(' '); | |
| 2741 buf->writestring(ident->toChars()); | |
| 2742 } | |
| 2743 buf->writebyte(';'); | |
| 2744 buf->writenl(); | |
| 2745 } | |
| 2746 | |
| 2747 /******************************** ContinueStatement ***************************/ | |
| 2748 | |
| 2749 ContinueStatement::ContinueStatement(Loc loc, Identifier *ident) | |
| 2750 : Statement(loc) | |
| 2751 { | |
| 2752 this->ident = ident; | |
| 2753 this->enclosingtryfinally = NULL; | |
| 2754 } | |
| 2755 | |
| 2756 Statement *ContinueStatement::syntaxCopy() | |
| 2757 { | |
| 2758 ContinueStatement *s = new ContinueStatement(loc, ident); | |
| 2759 return s; | |
| 2760 } | |
| 2761 | |
| 2762 Statement *ContinueStatement::semantic(Scope *sc) | |
| 2763 { | |
| 2764 enclosingtryfinally = sc->tfOfTry; | |
| 2765 //printf("ContinueStatement::semantic() %p\n", this); | |
| 2766 if (ident) | |
| 2767 { | |
| 2768 Scope *scx; | |
| 2769 FuncDeclaration *thisfunc = sc->func; | |
| 2770 | |
| 2771 for (scx = sc; scx; scx = scx->enclosing) | |
| 2772 { | |
| 2773 LabelStatement *ls; | |
| 2774 | |
| 2775 if (scx->func != thisfunc) // if in enclosing function | |
| 2776 { | |
| 2777 if (sc->fes) // if this is the body of a foreach | |
| 2778 { | |
| 2779 for (; scx; scx = scx->enclosing) | |
| 2780 { | |
| 2781 ls = scx->slabel; | |
| 2782 if (ls && ls->ident == ident && ls->statement == sc->fes) | |
| 2783 { | |
| 2784 // Replace continue ident; with return 0; | |
| 2785 return new ReturnStatement(0, new IntegerExp(0)); | |
| 2786 } | |
| 2787 } | |
| 2788 | |
| 2789 /* Post this statement to the fes, and replace | |
| 2790 * it with a return value that caller will put into | |
| 2791 * a switch. Caller will figure out where the break | |
| 2792 * label actually is. | |
| 2793 * Case numbers start with 2, not 0, as 0 is continue | |
| 2794 * and 1 is break. | |
| 2795 */ | |
| 2796 Statement *s; | |
| 2797 sc->fes->cases.push(this); | |
| 2798 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2799 return s; | |
| 2800 } | |
| 2801 break; // can't continue to it | |
| 2802 } | |
| 2803 | |
| 2804 ls = scx->slabel; | |
| 2805 if (ls && ls->ident == ident) | |
| 2806 { | |
| 2807 Statement *s = ls->statement; | |
| 2808 | |
| 2809 if (!s->hasContinue()) | |
| 2810 error("label '%s' has no continue", ident->toChars()); | |
| 2811 if (ls->tf != sc->tf) | |
| 2812 error("cannot continue out of finally block"); | |
| 2813 | |
| 2814 this->target = ls; | |
| 2815 return this; | |
| 2816 } | |
| 2817 } | |
| 2818 error("enclosing label '%s' for continue not found", ident->toChars()); | |
| 2819 } | |
| 2820 else if (!sc->scontinue) | |
| 2821 { | |
| 2822 if (sc->fes) | |
| 2823 { Statement *s; | |
| 2824 | |
| 2825 // Replace continue; with return 0; | |
| 2826 s = new ReturnStatement(0, new IntegerExp(0)); | |
| 2827 return s; | |
| 2828 } | |
| 2829 error("continue is not inside a loop"); | |
| 2830 } | |
| 2831 return this; | |
| 2832 } | |
| 2833 | |
| 2834 int ContinueStatement::fallOffEnd() | |
| 2835 { | |
| 2836 return FALSE; | |
| 2837 } | |
| 2838 | |
| 2839 void ContinueStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2840 { | |
| 2841 buf->writestring("continue"); | |
| 2842 if (ident) | |
| 2843 { buf->writebyte(' '); | |
| 2844 buf->writestring(ident->toChars()); | |
| 2845 } | |
| 2846 buf->writebyte(';'); | |
| 2847 buf->writenl(); | |
| 2848 } | |
| 2849 | |
| 2850 /******************************** SynchronizedStatement ***************************/ | |
| 2851 | |
| 2852 SynchronizedStatement::SynchronizedStatement(Loc loc, Expression *exp, Statement *body) | |
| 2853 : Statement(loc) | |
| 2854 { | |
| 2855 this->exp = exp; | |
| 2856 this->body = body; | |
| 2857 this->esync = NULL; | |
| 2858 } | |
| 2859 | |
| 2860 SynchronizedStatement::SynchronizedStatement(Loc loc, elem *esync, Statement *body) | |
| 2861 : Statement(loc) | |
| 2862 { | |
| 2863 this->exp = NULL; | |
| 2864 this->body = body; | |
| 2865 this->esync = esync; | |
| 2866 } | |
| 2867 | |
| 2868 Statement *SynchronizedStatement::syntaxCopy() | |
| 2869 { | |
| 2870 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 2871 SynchronizedStatement *s = new SynchronizedStatement(loc, e, body ? body->syntaxCopy() : NULL); | |
| 2872 return s; | |
| 2873 } | |
| 2874 | |
| 2875 Statement *SynchronizedStatement::semantic(Scope *sc) | |
| 2876 { | |
| 2877 if (exp) | |
| 2878 { ClassDeclaration *cd; | |
| 2879 | |
| 2880 exp = exp->semantic(sc); | |
| 2881 exp = resolveProperties(sc, exp); | |
| 2882 cd = exp->type->isClassHandle(); | |
| 2883 if (!cd) | |
| 2884 error("can only synchronize on class objects, not '%s'", exp->type->toChars()); | |
| 2885 else if (cd->isInterfaceDeclaration()) | |
| 2886 { Type *t = new TypeIdentifier(0, Id::Object); | |
| 2887 | |
| 2888 t = t->semantic(0, sc); | |
| 2889 exp = new CastExp(loc, exp, t); | |
| 2890 exp = exp->semantic(sc); | |
| 2891 } | |
| 2892 } | |
| 2893 if (body) | |
| 2894 body = body->semantic(sc); | |
| 2895 return this; | |
| 2896 } | |
| 2897 | |
| 2898 int SynchronizedStatement::hasBreak() | |
| 2899 { | |
| 2900 return FALSE; //TRUE; | |
| 2901 } | |
| 2902 | |
| 2903 int SynchronizedStatement::hasContinue() | |
| 2904 { | |
| 2905 return FALSE; //TRUE; | |
| 2906 } | |
| 2907 | |
| 2908 int SynchronizedStatement::usesEH() | |
| 2909 { | |
| 2910 return TRUE; | |
| 2911 } | |
| 2912 | |
| 2913 int SynchronizedStatement::fallOffEnd() | |
| 2914 { | |
| 2915 return body ? body->fallOffEnd() : TRUE; | |
| 2916 } | |
| 2917 | |
| 2918 void SynchronizedStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2919 { | |
| 2920 buf->writestring("synchronized"); | |
| 2921 if (exp) | |
| 2922 { buf->writebyte('('); | |
| 2923 exp->toCBuffer(buf, hgs); | |
| 2924 buf->writebyte(')'); | |
| 2925 } | |
| 2926 if (body) | |
| 2927 { | |
| 2928 buf->writebyte(' '); | |
| 2929 body->toCBuffer(buf, hgs); | |
| 2930 } | |
| 2931 } | |
| 2932 | |
| 2933 /******************************** WithStatement ***************************/ | |
| 2934 | |
| 2935 WithStatement::WithStatement(Loc loc, Expression *exp, Statement *body) | |
| 2936 : Statement(loc) | |
| 2937 { | |
| 2938 this->exp = exp; | |
| 2939 this->body = body; | |
| 2940 wthis = NULL; | |
| 2941 } | |
| 2942 | |
| 2943 Statement *WithStatement::syntaxCopy() | |
| 2944 { | |
| 2945 WithStatement *s = new WithStatement(loc, exp->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
| 2946 return s; | |
| 2947 } | |
| 2948 | |
| 2949 Statement *WithStatement::semantic(Scope *sc) | |
| 2950 { ScopeDsymbol *sym; | |
| 2951 Initializer *init; | |
| 2952 | |
| 2953 //printf("WithStatement::semantic()\n"); | |
| 2954 exp = exp->semantic(sc); | |
| 2955 exp = resolveProperties(sc, exp); | |
| 2956 if (exp->op == TOKimport) | |
| 2957 { ScopeExp *es = (ScopeExp *)exp; | |
| 2958 | |
| 2959 sym = es->sds; | |
| 2960 } | |
| 2961 else if (exp->op == TOKtype) | |
| 2962 { TypeExp *es = (TypeExp *)exp; | |
| 2963 | |
| 2964 sym = es->type->toDsymbol(sc)->isScopeDsymbol(); | |
| 2965 if (!sym) | |
| 2966 { error("%s has no members", es->toChars()); | |
| 2967 body = body->semantic(sc); | |
| 2968 return this; | |
| 2969 } | |
| 2970 } | |
| 2971 else | |
| 2972 { Type *t = exp->type; | |
| 2973 | |
| 2974 assert(t); | |
| 2975 t = t->toBasetype(); | |
| 2976 if (t->isClassHandle()) | |
| 2977 { | |
| 2978 init = new ExpInitializer(loc, exp); | |
| 2979 wthis = new VarDeclaration(loc, exp->type, Id::withSym, init); | |
| 2980 wthis->semantic(sc); | |
| 2981 | |
| 2982 sym = new WithScopeSymbol(this); | |
| 2983 sym->parent = sc->scopesym; | |
| 2984 } | |
| 2985 else if (t->ty == Tstruct) | |
| 2986 { | |
| 2987 Expression *e = exp->addressOf(sc); | |
| 2988 init = new ExpInitializer(loc, e); | |
| 2989 wthis = new VarDeclaration(loc, e->type, Id::withSym, init); | |
| 2990 wthis->semantic(sc); | |
| 2991 sym = new WithScopeSymbol(this); | |
| 2992 sym->parent = sc->scopesym; | |
| 2993 } | |
| 2994 else | |
| 2995 { error("with expressions must be class objects, not '%s'", exp->type->toChars()); | |
| 2996 return NULL; | |
| 2997 } | |
| 2998 } | |
| 2999 sc = sc->push(sym); | |
| 3000 | |
| 3001 if (body) | |
| 3002 body = body->semantic(sc); | |
| 3003 | |
| 3004 sc->pop(); | |
| 3005 | |
| 3006 return this; | |
| 3007 } | |
| 3008 | |
| 3009 void WithStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3010 { | |
| 3011 buf->writestring("with ("); | |
| 3012 exp->toCBuffer(buf, hgs); | |
| 3013 buf->writestring(")\n"); | |
| 3014 if (body) | |
| 3015 body->toCBuffer(buf, hgs); | |
| 3016 } | |
| 3017 | |
| 3018 int WithStatement::usesEH() | |
| 3019 { | |
| 3020 return body ? body->usesEH() : 0; | |
| 3021 } | |
| 3022 | |
| 3023 int WithStatement::fallOffEnd() | |
| 3024 { | |
| 3025 return body ? body->fallOffEnd() : TRUE; | |
| 3026 } | |
| 3027 | |
| 3028 /******************************** TryCatchStatement ***************************/ | |
| 3029 | |
| 3030 TryCatchStatement::TryCatchStatement(Loc loc, Statement *body, Array *catches) | |
| 3031 : Statement(loc) | |
| 3032 { | |
| 3033 this->body = body; | |
| 3034 this->catches = catches; | |
| 3035 } | |
| 3036 | |
| 3037 Statement *TryCatchStatement::syntaxCopy() | |
| 3038 { | |
| 3039 Array *a = new Array(); | |
| 3040 a->setDim(catches->dim); | |
| 3041 for (int i = 0; i < a->dim; i++) | |
| 3042 { Catch *c; | |
| 3043 | |
| 3044 c = (Catch *)catches->data[i]; | |
| 3045 c = c->syntaxCopy(); | |
| 3046 a->data[i] = c; | |
| 3047 } | |
| 3048 TryCatchStatement *s = new TryCatchStatement(loc, body->syntaxCopy(), a); | |
| 3049 return s; | |
| 3050 } | |
| 3051 | |
| 3052 Statement *TryCatchStatement::semantic(Scope *sc) | |
| 3053 { | |
| 3054 body = body->semanticScope(sc, NULL /*this*/, NULL); | |
| 3055 | |
| 3056 for (int i = 0; i < catches->dim; i++) | |
| 3057 { Catch *c; | |
| 3058 | |
| 3059 c = (Catch *)catches->data[i]; | |
| 3060 c->semantic(sc); | |
| 3061 | |
| 3062 // Determine if current catch 'hides' any previous catches | |
| 3063 for (int j = 0; j < i; j++) | |
| 3064 { Catch *cj = (Catch *)catches->data[j]; | |
| 3065 char *si = c->loc.toChars(); | |
| 3066 char *sj = cj->loc.toChars(); | |
| 3067 | |
| 3068 if (c->type->toBasetype()->implicitConvTo(cj->type->toBasetype())) | |
| 3069 error("catch at %s hides catch at %s", sj, si); | |
| 3070 } | |
| 3071 } | |
| 3072 return this; | |
| 3073 } | |
| 3074 | |
| 3075 int TryCatchStatement::hasBreak() | |
| 3076 { | |
| 3077 return FALSE; //TRUE; | |
| 3078 } | |
| 3079 | |
| 3080 int TryCatchStatement::usesEH() | |
| 3081 { | |
| 3082 return TRUE; | |
| 3083 } | |
| 3084 | |
| 3085 int TryCatchStatement::fallOffEnd() | |
| 3086 { | |
| 3087 int result = FALSE; | |
| 3088 | |
| 3089 if (body) | |
| 3090 result = body->fallOffEnd(); | |
| 3091 for (int i = 0; i < catches->dim; i++) | |
| 3092 { Catch *c; | |
| 3093 | |
| 3094 c = (Catch *)catches->data[i]; | |
| 3095 if (c->handler) | |
| 3096 result |= c->handler->fallOffEnd(); | |
| 3097 } | |
| 3098 return result; | |
| 3099 } | |
| 3100 | |
| 3101 void TryCatchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3102 { | |
| 3103 buf->writestring("try"); | |
| 3104 buf->writenl(); | |
| 3105 if (body) | |
| 3106 body->toCBuffer(buf, hgs); | |
| 3107 int i; | |
| 3108 for (i = 0; i < catches->dim; i++) | |
| 3109 { | |
| 3110 Catch *c = (Catch *)catches->data[i]; | |
| 3111 c->toCBuffer(buf, hgs); | |
| 3112 } | |
| 3113 } | |
| 3114 | |
| 3115 /******************************** Catch ***************************/ | |
| 3116 | |
| 3117 Catch::Catch(Loc loc, Type *t, Identifier *id, Statement *handler) | |
| 3118 { | |
| 3119 //printf("Catch(%s, loc = %s)\n", id->toChars(), loc.toChars()); | |
| 3120 this->loc = loc; | |
| 3121 this->type = t; | |
| 3122 this->ident = id; | |
| 3123 this->handler = handler; | |
| 3124 var = NULL; | |
| 3125 } | |
| 3126 | |
| 3127 Catch *Catch::syntaxCopy() | |
| 3128 { | |
| 3129 Catch *c = new Catch(loc, | |
| 3130 (type ? type->syntaxCopy() : NULL), | |
| 3131 ident, | |
| 3132 (handler ? handler->syntaxCopy() : NULL)); | |
| 3133 return c; | |
| 3134 } | |
| 3135 | |
| 3136 void Catch::semantic(Scope *sc) | |
| 3137 { ScopeDsymbol *sym; | |
| 3138 | |
| 3139 //printf("Catch::semantic(%s)\n", ident->toChars()); | |
| 3140 | |
| 3141 #ifndef IN_GCC | |
| 3142 if (sc->tf) | |
| 3143 { | |
| 3144 /* This is because the _d_local_unwind() gets the stack munged | |
| 3145 * up on this. The workaround is to place any try-catches into | |
| 3146 * a separate function, and call that. | |
| 3147 * To fix, have the compiler automatically convert the finally | |
| 3148 * body into a nested function. | |
| 3149 */ | |
| 3150 error(loc, "cannot put catch statement inside finally block"); | |
| 3151 } | |
| 3152 #endif | |
| 3153 | |
| 3154 sym = new ScopeDsymbol(); | |
| 3155 sym->parent = sc->scopesym; | |
| 3156 sc = sc->push(sym); | |
| 3157 | |
| 3158 if (!type) | |
| 3159 type = new TypeIdentifier(0, Id::Object); | |
| 3160 type = type->semantic(loc, sc); | |
| 3161 if (!type->toBasetype()->isClassHandle()) | |
| 3162 error("can only catch class objects, not '%s'", type->toChars()); | |
| 3163 else if (ident) | |
| 3164 { | |
| 3165 var = new VarDeclaration(loc, type, ident, NULL); | |
| 3166 var->parent = sc->parent; | |
| 3167 sc->insert(var); | |
| 3168 } | |
| 3169 handler = handler->semantic(sc); | |
| 3170 | |
| 3171 sc->pop(); | |
| 3172 } | |
| 3173 | |
| 3174 void Catch::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3175 { | |
| 3176 buf->writestring("catch"); | |
| 3177 if (type) | |
| 3178 { buf->writebyte('('); | |
| 3179 type->toCBuffer(buf, ident, hgs); | |
| 3180 buf->writebyte(')'); | |
| 3181 } | |
| 3182 buf->writenl(); | |
| 3183 buf->writebyte('{'); | |
| 3184 buf->writenl(); | |
| 3185 handler->toCBuffer(buf, hgs); | |
| 3186 buf->writebyte('}'); | |
| 3187 buf->writenl(); | |
| 3188 } | |
| 3189 | |
| 3190 /****************************** TryFinallyStatement ***************************/ | |
| 3191 | |
| 3192 TryFinallyStatement::TryFinallyStatement(Loc loc, Statement *body, Statement *finalbody) | |
| 3193 : Statement(loc) | |
| 3194 { | |
| 3195 this->body = body; | |
| 3196 this->finalbody = finalbody; | |
| 3197 this->enclosingtryfinally = NULL; | |
| 3198 } | |
| 3199 | |
| 3200 Statement *TryFinallyStatement::syntaxCopy() | |
| 3201 { | |
| 3202 TryFinallyStatement *s = new TryFinallyStatement(loc, | |
| 3203 body->syntaxCopy(), finalbody->syntaxCopy()); | |
| 3204 return s; | |
| 3205 } | |
| 3206 | |
| 3207 Statement *TryFinallyStatement::semantic(Scope *sc) | |
| 3208 { | |
| 3209 //printf("TryFinallyStatement::semantic()\n"); | |
| 3210 | |
| 3211 enclosingtryfinally = sc->tfOfTry; | |
| 3212 sc->tfOfTry = this; | |
| 3213 body = body->semantic(sc); | |
| 3214 sc->tfOfTry = enclosingtryfinally; | |
| 3215 | |
| 3216 sc = sc->push(); | |
| 3217 sc->tf = this; | |
| 3218 sc->sbreak = NULL; | |
| 3219 sc->scontinue = NULL; // no break or continue out of finally block | |
| 3220 finalbody = finalbody->semantic(sc); | |
| 3221 sc->pop(); | |
| 3222 return this; | |
| 3223 } | |
| 3224 | |
| 3225 void TryFinallyStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3226 { | |
| 3227 buf->printf("try\n{\n"); | |
| 3228 body->toCBuffer(buf, hgs); | |
| 3229 buf->printf("}\nfinally\n{\n"); | |
| 3230 finalbody->toCBuffer(buf, hgs); | |
| 3231 buf->writeByte('}'); | |
| 3232 buf->writenl(); | |
| 3233 } | |
| 3234 | |
| 3235 int TryFinallyStatement::hasBreak() | |
| 3236 { | |
| 3237 return FALSE; //TRUE; | |
| 3238 } | |
| 3239 | |
| 3240 int TryFinallyStatement::hasContinue() | |
| 3241 { | |
| 3242 return FALSE; //TRUE; | |
| 3243 } | |
| 3244 | |
| 3245 int TryFinallyStatement::usesEH() | |
| 3246 { | |
| 3247 return TRUE; | |
| 3248 } | |
| 3249 | |
| 3250 int TryFinallyStatement::fallOffEnd() | |
| 3251 { int result; | |
| 3252 | |
| 3253 result = body ? body->fallOffEnd() : TRUE; | |
| 3254 // if (finalbody) | |
| 3255 // result = finalbody->fallOffEnd(); | |
| 3256 return result; | |
| 3257 } | |
| 3258 | |
| 3259 /****************************** OnScopeStatement ***************************/ | |
| 3260 | |
| 3261 OnScopeStatement::OnScopeStatement(Loc loc, TOK tok, Statement *statement) | |
| 3262 : Statement(loc) | |
| 3263 { | |
| 3264 this->tok = tok; | |
| 3265 this->statement = statement; | |
| 3266 } | |
| 3267 | |
| 3268 Statement *OnScopeStatement::syntaxCopy() | |
| 3269 { | |
| 3270 OnScopeStatement *s = new OnScopeStatement(loc, | |
| 3271 tok, statement->syntaxCopy()); | |
| 3272 return s; | |
| 3273 } | |
| 3274 | |
| 3275 Statement *OnScopeStatement::semantic(Scope *sc) | |
| 3276 { | |
| 3277 /* semantic is called on results of scopeCode() */ | |
| 3278 return this; | |
| 3279 } | |
| 3280 | |
| 3281 void OnScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3282 { | |
| 3283 buf->writestring(Token::toChars(tok)); | |
| 3284 buf->writebyte(' '); | |
| 3285 statement->toCBuffer(buf, hgs); | |
| 3286 } | |
| 3287 | |
| 3288 int OnScopeStatement::usesEH() | |
| 3289 { | |
| 3290 return (tok != TOKon_scope_success); | |
| 3291 } | |
| 3292 | |
| 3293 void OnScopeStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 3294 { | |
| 3295 //printf("OnScopeStatement::scopeCode()\n"); | |
| 3296 //print(); | |
| 3297 *sentry = NULL; | |
| 3298 *sexception = NULL; | |
| 3299 *sfinally = NULL; | |
| 3300 switch (tok) | |
| 3301 { | |
| 3302 case TOKon_scope_exit: | |
| 3303 *sfinally = statement; | |
| 3304 break; | |
| 3305 | |
| 3306 case TOKon_scope_failure: | |
| 3307 *sexception = statement; | |
| 3308 break; | |
| 3309 | |
| 3310 case TOKon_scope_success: | |
| 3311 { | |
| 3312 /* Create: | |
| 3313 * sentry: int x = 0; | |
| 3314 * sexception: x = 1; | |
| 3315 * sfinally: if (!x) statement; | |
| 3316 */ | |
| 3317 static int num; | |
| 3318 char name[5 + sizeof(num) * 3 + 1]; | |
| 3319 sprintf(name, "__osf%d", ++num); | |
| 3320 Identifier *id = Lexer::idPool(name); | |
| 3321 | |
| 3322 ExpInitializer *ie = new ExpInitializer(loc, new IntegerExp(0)); | |
| 3323 VarDeclaration *v = new VarDeclaration(loc, Type::tint32, id, ie); | |
| 3324 *sentry = new DeclarationStatement(loc, v); | |
| 3325 | |
| 3326 Expression *e = new IntegerExp(1); | |
| 3327 e = new AssignExp(0, new VarExp(0, v), e); | |
| 3328 *sexception = new ExpStatement(0, e); | |
| 3329 | |
| 3330 e = new VarExp(0, v); | |
| 3331 e = new NotExp(0, e); | |
| 3332 *sfinally = new IfStatement(0, NULL, e, statement, NULL); | |
| 3333 | |
| 3334 break; | |
| 3335 } | |
| 3336 | |
| 3337 default: | |
| 3338 assert(0); | |
| 3339 } | |
| 3340 } | |
| 3341 | |
| 3342 /******************************** ThrowStatement ***************************/ | |
| 3343 | |
| 3344 ThrowStatement::ThrowStatement(Loc loc, Expression *exp) | |
| 3345 : Statement(loc) | |
| 3346 { | |
| 3347 this->exp = exp; | |
| 3348 } | |
| 3349 | |
| 3350 Statement *ThrowStatement::syntaxCopy() | |
| 3351 { | |
| 3352 ThrowStatement *s = new ThrowStatement(loc, exp->syntaxCopy()); | |
| 3353 return s; | |
| 3354 } | |
| 3355 | |
| 3356 Statement *ThrowStatement::semantic(Scope *sc) | |
| 3357 { | |
| 3358 //printf("ThrowStatement::semantic()\n"); | |
| 3359 | |
| 3360 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3361 fd->hasReturnExp |= 2; | |
| 3362 | |
| 3363 if (sc->incontract) | |
| 3364 error("Throw statements cannot be in contracts"); | |
| 3365 exp = exp->semantic(sc); | |
| 3366 exp = resolveProperties(sc, exp); | |
| 3367 if (!exp->type->toBasetype()->isClassHandle()) | |
| 3368 error("can only throw class objects, not type %s", exp->type->toChars()); | |
| 3369 return this; | |
| 3370 } | |
| 3371 | |
| 3372 int ThrowStatement::fallOffEnd() | |
| 3373 { | |
| 3374 return FALSE; | |
| 3375 } | |
| 3376 | |
| 3377 void ThrowStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3378 { | |
| 3379 buf->printf("throw "); | |
| 3380 exp->toCBuffer(buf, hgs); | |
| 3381 buf->writeByte(';'); | |
| 3382 buf->writenl(); | |
| 3383 } | |
| 3384 | |
| 3385 /******************************** VolatileStatement **************************/ | |
| 3386 | |
| 3387 VolatileStatement::VolatileStatement(Loc loc, Statement *statement) | |
| 3388 : Statement(loc) | |
| 3389 { | |
| 3390 this->statement = statement; | |
| 3391 } | |
| 3392 | |
| 3393 Statement *VolatileStatement::syntaxCopy() | |
| 3394 { | |
| 3395 VolatileStatement *s = new VolatileStatement(loc, | |
| 3396 statement ? statement->syntaxCopy() : NULL); | |
| 3397 return s; | |
| 3398 } | |
| 3399 | |
| 3400 Statement *VolatileStatement::semantic(Scope *sc) | |
| 3401 { | |
| 3402 statement = statement ? statement->semantic(sc) : NULL; | |
| 3403 return this; | |
| 3404 } | |
| 3405 | |
| 3406 Statements *VolatileStatement::flatten(Scope *sc) | |
| 3407 { | |
| 3408 Statements *a; | |
| 3409 | |
| 3410 a = statement ? statement->flatten(sc) : NULL; | |
| 3411 if (a) | |
| 3412 { for (int i = 0; i < a->dim; i++) | |
| 3413 { Statement *s = (Statement *)a->data[i]; | |
| 3414 | |
| 3415 s = new VolatileStatement(loc, s); | |
| 3416 a->data[i] = s; | |
| 3417 } | |
| 3418 } | |
| 3419 | |
| 3420 return a; | |
| 3421 } | |
| 3422 | |
| 3423 int VolatileStatement::fallOffEnd() | |
| 3424 { | |
| 3425 return statement ? statement->fallOffEnd() : TRUE; | |
| 3426 } | |
| 3427 | |
| 3428 void VolatileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3429 { | |
| 3430 buf->writestring("volatile"); | |
| 3431 if (statement) | |
| 3432 { if (statement->isScopeStatement()) | |
| 3433 buf->writenl(); | |
| 3434 else | |
| 3435 buf->writebyte(' '); | |
| 3436 statement->toCBuffer(buf, hgs); | |
| 3437 } | |
| 3438 } | |
| 3439 | |
| 3440 | |
| 3441 /******************************** GotoStatement ***************************/ | |
| 3442 | |
| 3443 GotoStatement::GotoStatement(Loc loc, Identifier *ident) | |
| 3444 : Statement(loc) | |
| 3445 { | |
| 3446 this->ident = ident; | |
| 3447 this->label = NULL; | |
| 3448 this->tf = NULL; | |
| 3449 this->enclosingtryfinally = NULL; | |
| 3450 } | |
| 3451 | |
| 3452 Statement *GotoStatement::syntaxCopy() | |
| 3453 { | |
| 3454 GotoStatement *s = new GotoStatement(loc, ident); | |
| 3455 return s; | |
| 3456 } | |
| 3457 | |
| 3458 Statement *GotoStatement::semantic(Scope *sc) | |
| 3459 { FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3460 | |
| 3461 //printf("GotoStatement::semantic()\n"); | |
| 3462 tf = sc->tf; | |
| 3463 enclosingtryfinally = sc->tfOfTry; | |
| 3464 label = fd->searchLabel(ident); | |
| 3465 if (!label->statement && sc->fes) | |
| 3466 { | |
| 3467 /* Either the goto label is forward referenced or it | |
| 3468 * is in the function that the enclosing foreach is in. | |
| 3469 * Can't know yet, so wrap the goto in a compound statement | |
| 3470 * so we can patch it later, and add it to a 'look at this later' | |
| 3471 * list. | |
| 3472 */ | |
| 3473 Statements *a = new Statements(); | |
| 3474 Statement *s; | |
| 3475 | |
| 3476 a->push(this); | |
| 3477 s = new CompoundStatement(loc, a); | |
| 3478 sc->fes->gotos.push(s); // 'look at this later' list | |
| 3479 return s; | |
| 3480 } | |
| 3481 if (label->statement && label->statement->tf != sc->tf) | |
| 3482 error("cannot goto in or out of finally block"); | |
| 3483 return this; | |
| 3484 } | |
| 3485 | |
| 3486 int GotoStatement::fallOffEnd() | |
| 3487 { | |
| 3488 return FALSE; | |
| 3489 } | |
| 3490 | |
| 3491 void GotoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3492 { | |
| 3493 buf->writestring("goto "); | |
| 3494 buf->writestring(ident->toChars()); | |
| 3495 buf->writebyte(';'); | |
| 3496 buf->writenl(); | |
| 3497 } | |
| 3498 | |
| 3499 /******************************** LabelStatement ***************************/ | |
| 3500 | |
| 3501 LabelStatement::LabelStatement(Loc loc, Identifier *ident, Statement *statement) | |
| 3502 : Statement(loc) | |
| 3503 { | |
| 3504 this->ident = ident; | |
| 3505 this->statement = statement; | |
| 3506 this->tf = NULL; | |
| 3507 this->enclosingtryfinally = NULL; | |
| 3508 this->lblock = NULL; | |
| 3509 this->isReturnLabel = 0; | |
| 3510 this->llvmBB = NULL; | |
| 3511 } | |
| 3512 | |
| 3513 Statement *LabelStatement::syntaxCopy() | |
| 3514 { | |
| 3515 LabelStatement *s = new LabelStatement(loc, ident, statement->syntaxCopy()); | |
| 3516 return s; | |
| 3517 } | |
| 3518 | |
| 3519 Statement *LabelStatement::semantic(Scope *sc) | |
| 3520 { LabelDsymbol *ls; | |
| 3521 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3522 | |
| 3523 //printf("LabelStatement::semantic()\n"); | |
| 3524 ls = fd->searchLabel(ident); | |
| 3525 if (ls->statement) | |
| 3526 error("Label '%s' already defined", ls->toChars()); | |
| 3527 else | |
| 3528 ls->statement = this; | |
| 3529 tf = sc->tf; | |
| 3530 enclosingtryfinally = sc->tfOfTry; | |
| 3531 sc = sc->push(); | |
| 3532 sc->scopesym = sc->enclosing->scopesym; | |
| 3533 sc->callSuper |= CSXlabel; | |
| 3534 sc->slabel = this; | |
| 3535 if (statement) | |
| 3536 statement = statement->semantic(sc); | |
| 3537 sc->pop(); | |
| 3538 return this; | |
| 3539 } | |
| 3540 | |
| 3541 Statements *LabelStatement::flatten(Scope *sc) | |
| 3542 { | |
| 3543 Statements *a = NULL; | |
| 3544 | |
| 3545 if (statement) | |
| 3546 { | |
| 3547 a = statement->flatten(sc); | |
| 3548 if (a) | |
| 3549 { | |
| 3550 if (!a->dim) | |
| 3551 { | |
| 3552 a->push(new ExpStatement(loc, NULL)); | |
| 3553 } | |
| 3554 Statement *s = (Statement *)a->data[0]; | |
| 3555 | |
| 3556 s = new LabelStatement(loc, ident, s); | |
| 3557 a->data[0] = s; | |
| 3558 } | |
| 3559 } | |
| 3560 | |
| 3561 return a; | |
| 3562 } | |
| 3563 | |
| 3564 | |
| 3565 int LabelStatement::usesEH() | |
| 3566 { | |
| 3567 return statement ? statement->usesEH() : FALSE; | |
| 3568 } | |
| 3569 | |
| 3570 int LabelStatement::fallOffEnd() | |
| 3571 { | |
| 3572 return statement ? statement->fallOffEnd() : TRUE; | |
| 3573 } | |
| 3574 | |
| 3575 int LabelStatement::comeFrom() | |
| 3576 { | |
| 3577 //printf("LabelStatement::comeFrom()\n"); | |
| 3578 return TRUE; | |
| 3579 } | |
| 3580 | |
| 3581 void LabelStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3582 { | |
| 3583 buf->writestring(ident->toChars()); | |
| 3584 buf->writebyte(':'); | |
| 3585 buf->writenl(); | |
| 3586 if (statement) | |
| 3587 statement->toCBuffer(buf, hgs); | |
| 3588 } | |
| 3589 | |
| 3590 | |
| 3591 /******************************** LabelDsymbol ***************************/ | |
| 3592 | |
| 3593 LabelDsymbol::LabelDsymbol(Identifier *ident) | |
| 3594 : Dsymbol(ident) | |
| 3595 { | |
| 3596 statement = NULL; | |
| 3597 asmLabelNum = 0; | |
| 3598 } | |
| 3599 | |
| 3600 LabelDsymbol *LabelDsymbol::isLabel() // is this a LabelDsymbol()? | |
| 3601 { | |
| 3602 return this; | |
| 3603 } | |
| 3604 | |
| 3605 |