Mercurial > projects > ldc
annotate dmd/statement.c @ 351:f273f5c58a9a trunk
[svn r372] Fixed extern(C++) handling now same as DMD, which is to treat it like extern(C).
Fixed a problem in resolving struct types where the size of elements might not yet be known. Switched to using DMD size() instead
of LLVM ABI size (TargetData).
| author | lindquist |
|---|---|
| date | Mon, 14 Jul 2008 03:23:43 +0200 |
| parents | aaade6ded589 |
| children | a7a26f538d6e |
| rev | line source |
|---|---|
| 159 | 1 |
| 2 // Compiler implementation of the D programming language | |
| 336 | 3 // Copyright (c) 1999-2008 by Digital Mars |
| 159 | 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 | |
| 336 | 116 /* Only valid after semantic analysis |
| 117 */ | |
| 118 int Statement::blockExit() | |
| 119 { | |
| 120 printf("Statement::blockExit(%p)\n", this); | |
| 121 printf("%s\n", toChars()); | |
| 122 assert(0); | |
| 123 return BEany; | |
| 124 } | |
| 125 | |
| 159 | 126 // TRUE if statement may fall off the end without a throw or return |
| 127 | |
| 128 int Statement::fallOffEnd() | |
| 129 { | |
| 130 return TRUE; | |
| 131 } | |
| 132 | |
| 133 // TRUE if statement 'comes from' somewhere else, like a goto | |
| 134 | |
| 135 int Statement::comeFrom() | |
| 136 { | |
| 137 //printf("Statement::comeFrom()\n"); | |
| 138 return FALSE; | |
| 139 } | |
| 140 | |
| 141 /**************************************** | |
| 142 * If this statement has code that needs to run in a finally clause | |
| 143 * at the end of the current scope, return that code in the form of | |
| 144 * a Statement. | |
| 145 * Output: | |
| 146 * *sentry code executed upon entry to the scope | |
| 147 * *sexception code executed upon exit from the scope via exception | |
| 148 * *sfinally code executed in finally block | |
| 149 */ | |
| 150 | |
| 151 void Statement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 152 { | |
| 153 //printf("Statement::scopeCode()\n"); | |
| 154 //print(); | |
| 155 *sentry = NULL; | |
| 156 *sexception = NULL; | |
| 157 *sfinally = NULL; | |
| 158 } | |
| 159 | |
| 160 /********************************* | |
| 161 * Flatten out the scope by presenting the statement | |
| 162 * as an array of statements. | |
| 163 * Returns NULL if no flattening necessary. | |
| 164 */ | |
| 165 | |
| 166 Statements *Statement::flatten(Scope *sc) | |
| 167 { | |
| 168 return NULL; | |
| 169 } | |
| 170 | |
| 171 | |
| 172 /******************************** ExpStatement ***************************/ | |
| 173 | |
| 174 ExpStatement::ExpStatement(Loc loc, Expression *exp) | |
| 175 : Statement(loc) | |
| 176 { | |
| 177 this->exp = exp; | |
| 178 } | |
| 179 | |
| 180 Statement *ExpStatement::syntaxCopy() | |
| 181 { | |
| 182 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 183 ExpStatement *es = new ExpStatement(loc, e); | |
| 184 return es; | |
| 185 } | |
| 186 | |
| 187 void ExpStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 188 { | |
| 189 if (exp) | |
| 190 exp->toCBuffer(buf, hgs); | |
| 191 buf->writeByte(';'); | |
| 192 if (!hgs->FLinit.init) | |
| 193 buf->writenl(); | |
| 194 } | |
| 195 | |
| 196 Statement *ExpStatement::semantic(Scope *sc) | |
| 197 { | |
| 198 if (exp) | |
| 199 { | |
| 200 //printf("ExpStatement::semantic() %s\n", exp->toChars()); | |
| 201 exp = exp->semantic(sc); | |
| 202 exp = resolveProperties(sc, exp); | |
| 203 exp->checkSideEffect(0); | |
| 204 exp = exp->optimize(0); | |
| 205 //exp = exp->optimize(isDeclarationStatement() ? WANTvalue : 0); | |
| 206 } | |
| 207 return this; | |
| 208 } | |
| 209 | |
| 336 | 210 int ExpStatement::blockExit() |
| 211 { int result = BEfallthru; | |
| 212 | |
| 213 if (exp) | |
| 214 { | |
| 215 if (exp->op == TOKhalt) | |
| 216 return BEhalt; | |
| 217 if (exp->op == TOKassert) | |
| 218 { AssertExp *a = (AssertExp *)exp; | |
| 219 | |
| 220 if (a->e1->isBool(FALSE)) // if it's an assert(0) | |
| 221 return BEhalt; | |
| 222 } | |
| 223 if (exp->canThrow()) | |
| 224 result |= BEthrow; | |
| 225 } | |
| 226 return result; | |
| 227 } | |
| 228 | |
| 159 | 229 int ExpStatement::fallOffEnd() |
| 230 { | |
| 231 if (exp) | |
| 232 { | |
| 233 if (exp->op == TOKassert) | |
| 234 { AssertExp *a = (AssertExp *)exp; | |
| 235 | |
| 236 if (a->e1->isBool(FALSE)) // if it's an assert(0) | |
| 237 return FALSE; | |
| 238 } | |
| 239 else if (exp->op == TOKhalt) | |
| 240 return FALSE; | |
| 241 } | |
| 242 return TRUE; | |
| 243 } | |
| 244 | |
| 245 /******************************** CompileStatement ***************************/ | |
| 246 | |
| 247 CompileStatement::CompileStatement(Loc loc, Expression *exp) | |
| 248 : Statement(loc) | |
| 249 { | |
| 250 this->exp = exp; | |
| 251 } | |
| 252 | |
| 253 Statement *CompileStatement::syntaxCopy() | |
| 254 { | |
| 255 Expression *e = exp->syntaxCopy(); | |
| 256 CompileStatement *es = new CompileStatement(loc, e); | |
| 257 return es; | |
| 258 } | |
| 259 | |
| 260 void CompileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 261 { | |
| 262 buf->writestring("mixin("); | |
| 263 exp->toCBuffer(buf, hgs); | |
| 264 buf->writestring(");"); | |
| 265 if (!hgs->FLinit.init) | |
| 266 buf->writenl(); | |
| 267 } | |
| 268 | |
| 336 | 269 Statements *CompileStatement::flatten(Scope *sc) |
| 159 | 270 { |
| 336 | 271 //printf("CompileStatement::flatten() %s\n", exp->toChars()); |
| 159 | 272 exp = exp->semantic(sc); |
| 273 exp = resolveProperties(sc, exp); | |
| 274 exp = exp->optimize(WANTvalue | WANTinterpret); | |
| 275 if (exp->op != TOKstring) | |
| 276 { error("argument to mixin must be a string, not (%s)", exp->toChars()); | |
| 336 | 277 return NULL; |
| 159 | 278 } |
| 279 StringExp *se = (StringExp *)exp; | |
| 280 se = se->toUTF8(sc); | |
| 281 Parser p(sc->module, (unsigned char *)se->string, se->len, 0); | |
| 282 p.loc = loc; | |
| 283 p.nextToken(); | |
| 284 | |
| 336 | 285 Statements *a = new Statements(); |
| 159 | 286 while (p.token.value != TOKeof) |
| 287 { | |
| 288 Statement *s = p.parseStatement(PSsemi | PScurlyscope); | |
| 336 | 289 a->push(s); |
| 159 | 290 } |
| 336 | 291 return a; |
| 292 } | |
| 293 | |
| 294 Statement *CompileStatement::semantic(Scope *sc) | |
| 295 { | |
| 296 //printf("CompileStatement::semantic() %s\n", exp->toChars()); | |
| 297 Statements *a = flatten(sc); | |
| 298 if (!a) | |
| 299 return NULL; | |
| 300 Statement *s = new CompoundStatement(loc, a); | |
| 159 | 301 return s->semantic(sc); |
| 302 } | |
| 303 | |
| 304 | |
| 305 /******************************** DeclarationStatement ***************************/ | |
| 306 | |
| 307 DeclarationStatement::DeclarationStatement(Loc loc, Dsymbol *declaration) | |
| 308 : ExpStatement(loc, new DeclarationExp(loc, declaration)) | |
| 309 { | |
| 310 } | |
| 311 | |
| 312 DeclarationStatement::DeclarationStatement(Loc loc, Expression *exp) | |
| 313 : ExpStatement(loc, exp) | |
| 314 { | |
| 315 } | |
| 316 | |
| 317 Statement *DeclarationStatement::syntaxCopy() | |
| 318 { | |
| 319 DeclarationStatement *ds = new DeclarationStatement(loc, exp->syntaxCopy()); | |
| 320 return ds; | |
| 321 } | |
| 322 | |
| 323 void DeclarationStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 324 { | |
| 325 //printf("DeclarationStatement::scopeCode()\n"); | |
| 326 //print(); | |
| 327 | |
| 328 *sentry = NULL; | |
| 329 *sexception = NULL; | |
| 330 *sfinally = NULL; | |
| 331 | |
| 332 if (exp) | |
| 333 { | |
| 334 if (exp->op == TOKdeclaration) | |
| 335 { | |
| 336 DeclarationExp *de = (DeclarationExp *)(exp); | |
| 337 VarDeclaration *v = de->declaration->isVarDeclaration(); | |
| 338 if (v) | |
| 339 { Expression *e; | |
| 340 | |
| 341 e = v->callAutoDtor(); | |
| 342 if (e) | |
| 343 { | |
| 344 //printf("dtor is: "); e->print(); | |
| 345 *sfinally = new ExpStatement(loc, e); | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 } | |
| 351 | |
| 352 void DeclarationStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 353 { | |
| 354 exp->toCBuffer(buf, hgs); | |
| 355 } | |
| 356 | |
| 357 | |
| 358 /******************************** CompoundStatement ***************************/ | |
| 359 | |
| 360 CompoundStatement::CompoundStatement(Loc loc, Statements *s) | |
| 361 : Statement(loc) | |
| 362 { | |
| 363 statements = s; | |
| 364 } | |
| 365 | |
| 366 CompoundStatement::CompoundStatement(Loc loc, Statement *s1, Statement *s2) | |
| 367 : Statement(loc) | |
| 368 { | |
| 369 statements = new Statements(); | |
| 370 statements->reserve(2); | |
| 371 statements->push(s1); | |
| 372 statements->push(s2); | |
| 373 } | |
| 374 | |
| 375 Statement *CompoundStatement::syntaxCopy() | |
| 376 { | |
| 377 Statements *a = new Statements(); | |
| 378 a->setDim(statements->dim); | |
| 379 for (size_t i = 0; i < statements->dim; i++) | |
| 380 { Statement *s = (Statement *)statements->data[i]; | |
| 381 if (s) | |
| 382 s = s->syntaxCopy(); | |
| 383 a->data[i] = s; | |
| 384 } | |
| 385 CompoundStatement *cs = new CompoundStatement(loc, a); | |
| 386 return cs; | |
| 387 } | |
| 388 | |
| 389 | |
| 390 Statement *CompoundStatement::semantic(Scope *sc) | |
| 391 { Statement *s; | |
| 392 | |
| 393 //printf("CompoundStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
| 394 | |
| 395 for (size_t i = 0; i < statements->dim; ) | |
| 396 { | |
| 397 s = (Statement *) statements->data[i]; | |
| 398 if (s) | |
| 399 { Statements *a = s->flatten(sc); | |
| 400 | |
| 401 if (a) | |
| 402 { | |
| 403 statements->remove(i); | |
| 404 statements->insert(i, a); | |
| 405 continue; | |
| 406 } | |
| 407 s = s->semantic(sc); | |
| 408 statements->data[i] = s; | |
| 409 if (s) | |
| 410 { | |
| 411 Statement *sentry; | |
| 412 Statement *sexception; | |
| 413 Statement *sfinally; | |
| 414 | |
| 415 s->scopeCode(&sentry, &sexception, &sfinally); | |
| 416 if (sentry) | |
| 417 { | |
| 418 sentry = sentry->semantic(sc); | |
| 419 statements->data[i] = sentry; | |
| 420 } | |
| 421 if (sexception) | |
| 422 { | |
| 423 if (i + 1 == statements->dim && !sfinally) | |
| 424 { | |
| 425 #if 1 | |
| 426 sexception = sexception->semantic(sc); | |
| 427 #else | |
| 428 statements->push(sexception); | |
| 429 if (sfinally) | |
| 430 // Assume sexception does not throw | |
| 431 statements->push(sfinally); | |
| 432 #endif | |
| 433 } | |
| 434 else | |
| 435 { | |
| 436 /* Rewrite: | |
| 437 * s; s1; s2; | |
| 438 * As: | |
| 439 * s; | |
| 440 * try { s1; s2; } | |
| 441 * catch (Object __o) | |
| 442 * { sexception; throw __o; } | |
| 443 */ | |
| 444 Statement *body; | |
| 445 Statements *a = new Statements(); | |
| 446 | |
| 447 for (int j = i + 1; j < statements->dim; j++) | |
| 448 { | |
| 449 a->push(statements->data[j]); | |
| 450 } | |
| 451 body = new CompoundStatement(0, a); | |
| 452 body = new ScopeStatement(0, body); | |
| 453 | |
| 454 static int num; | |
| 455 char name[3 + sizeof(num) * 3 + 1]; | |
| 456 sprintf(name, "__o%d", ++num); | |
| 457 Identifier *id = Lexer::idPool(name); | |
| 458 | |
| 459 Statement *handler = new ThrowStatement(0, new IdentifierExp(0, id)); | |
| 460 handler = new CompoundStatement(0, sexception, handler); | |
| 461 | |
| 462 Array *catches = new Array(); | |
| 463 Catch *ctch = new Catch(0, NULL, id, handler); | |
| 464 catches->push(ctch); | |
| 465 s = new TryCatchStatement(0, body, catches); | |
| 466 | |
| 467 if (sfinally) | |
| 468 s = new TryFinallyStatement(0, s, sfinally); | |
| 469 s = s->semantic(sc); | |
| 470 statements->setDim(i + 1); | |
| 471 statements->push(s); | |
| 472 break; | |
| 473 } | |
| 474 } | |
| 475 else if (sfinally) | |
| 476 { | |
| 477 if (0 && i + 1 == statements->dim) | |
| 478 { | |
| 479 statements->push(sfinally); | |
| 480 } | |
| 481 else | |
| 482 { | |
| 483 /* Rewrite: | |
| 484 * s; s1; s2; | |
| 485 * As: | |
| 486 * s; try { s1; s2; } finally { sfinally; } | |
| 487 */ | |
| 488 Statement *body; | |
| 489 Statements *a = new Statements(); | |
| 490 | |
| 491 for (int j = i + 1; j < statements->dim; j++) | |
| 492 { | |
| 493 a->push(statements->data[j]); | |
| 494 } | |
| 495 body = new CompoundStatement(0, a); | |
| 496 s = new TryFinallyStatement(0, body, sfinally); | |
| 497 s = s->semantic(sc); | |
| 498 statements->setDim(i + 1); | |
| 499 statements->push(s); | |
| 500 break; | |
| 501 } | |
| 502 } | |
| 503 } | |
| 504 } | |
| 505 i++; | |
| 506 } | |
|
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[svn r248] Fixed: labels in inline asm block now work for the normal case.
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changeset
|
507 if (statements->dim == 1 && !isAsmBlockStatement()) |
| 336 | 508 { |
| 509 return (Statement *)statements->data[0]; | |
| 510 } | |
| 159 | 511 return this; |
| 512 } | |
| 513 | |
| 514 Statements *CompoundStatement::flatten(Scope *sc) | |
| 515 { | |
| 516 return statements; | |
| 517 } | |
| 518 | |
| 519 ReturnStatement *CompoundStatement::isReturnStatement() | |
| 336 | 520 { |
| 159 | 521 ReturnStatement *rs = NULL; |
| 522 | |
| 336 | 523 for (int i = 0; i < statements->dim; i++) |
| 524 { Statement *s = (Statement *) statements->data[i]; | |
| 159 | 525 if (s) |
| 526 { | |
| 527 rs = s->isReturnStatement(); | |
| 528 if (rs) | |
| 529 break; | |
| 530 } | |
| 531 } | |
| 532 return rs; | |
| 533 } | |
| 534 | |
| 535 void CompoundStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 336 | 536 { |
| 537 for (int i = 0; i < statements->dim; i++) | |
| 538 { Statement *s = (Statement *) statements->data[i]; | |
| 159 | 539 if (s) |
| 540 s->toCBuffer(buf, hgs); | |
| 541 } | |
| 542 } | |
| 543 | |
| 544 int CompoundStatement::usesEH() | |
| 545 { | |
| 546 for (int i = 0; i < statements->dim; i++) | |
| 336 | 547 { Statement *s = (Statement *) statements->data[i]; |
| 159 | 548 if (s && s->usesEH()) |
| 549 return TRUE; | |
| 550 } | |
| 551 return FALSE; | |
| 552 } | |
| 553 | |
| 336 | 554 int CompoundStatement::blockExit() |
| 555 { | |
| 556 //printf("CompoundStatement::blockExit(%p) %d\n", this, statements->dim); | |
| 557 int result = BEfallthru; | |
| 558 for (size_t i = 0; i < statements->dim; i++) | |
| 559 { Statement *s = (Statement *) statements->data[i]; | |
| 560 if (s) | |
| 561 { | |
| 562 //printf("result = x%x\n", result); | |
| 563 //printf("%s\n", s->toChars()); | |
| 564 if (!(result & BEfallthru) && !s->comeFrom()) | |
| 565 { | |
| 566 if (global.params.warnings) | |
| 567 { fprintf(stdmsg, "warning - "); | |
| 568 s->error("statement is not reachable"); | |
| 569 } | |
| 570 } | |
| 571 | |
| 572 result &= ~BEfallthru; | |
| 573 result |= s->blockExit(); | |
| 574 } | |
| 575 } | |
| 576 return result; | |
| 577 } | |
| 578 | |
| 159 | 579 int CompoundStatement::fallOffEnd() |
| 580 { int falloff = TRUE; | |
| 581 | |
| 582 //printf("CompoundStatement::fallOffEnd() %s\n", toChars()); | |
| 583 for (int i = 0; i < statements->dim; i++) | |
| 584 { Statement *s = (Statement *)statements->data[i]; | |
| 585 | |
| 586 if (!s) | |
| 587 continue; | |
| 588 | |
| 589 if (!falloff && global.params.warnings && !s->comeFrom()) | |
| 590 { | |
|
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591 warning("%s: statement is not reachable", s->loc.toChars()); |
| 159 | 592 } |
| 593 falloff = s->fallOffEnd(); | |
| 594 } | |
| 595 return falloff; | |
| 596 } | |
| 597 | |
| 598 int CompoundStatement::comeFrom() | |
| 599 { int comefrom = FALSE; | |
| 600 | |
| 601 //printf("CompoundStatement::comeFrom()\n"); | |
| 602 for (int i = 0; i < statements->dim; i++) | |
| 603 { Statement *s = (Statement *)statements->data[i]; | |
| 604 | |
| 605 if (!s) | |
| 606 continue; | |
| 607 | |
| 608 comefrom |= s->comeFrom(); | |
| 609 } | |
| 610 return comefrom; | |
| 611 } | |
| 612 | |
| 613 | |
| 614 /**************************** UnrolledLoopStatement ***************************/ | |
| 615 | |
| 616 UnrolledLoopStatement::UnrolledLoopStatement(Loc loc, Statements *s) | |
| 617 : Statement(loc) | |
| 618 { | |
| 619 statements = s; | |
| 309 | 620 enclosinghandler = NULL; |
| 159 | 621 } |
| 622 | |
| 623 Statement *UnrolledLoopStatement::syntaxCopy() | |
| 624 { | |
| 625 Statements *a = new Statements(); | |
| 626 a->setDim(statements->dim); | |
| 627 for (size_t i = 0; i < statements->dim; i++) | |
| 628 { Statement *s = (Statement *)statements->data[i]; | |
| 629 if (s) | |
| 630 s = s->syntaxCopy(); | |
| 631 a->data[i] = s; | |
| 632 } | |
| 633 UnrolledLoopStatement *cs = new UnrolledLoopStatement(loc, a); | |
| 634 return cs; | |
| 635 } | |
| 636 | |
| 637 | |
| 638 Statement *UnrolledLoopStatement::semantic(Scope *sc) | |
| 639 { | |
| 640 //printf("UnrolledLoopStatement::semantic(this = %p, sc = %p)\n", this, sc); | |
| 641 | |
| 309 | 642 enclosinghandler = sc->tfOfTry; |
| 159 | 643 |
| 644 sc->noctor++; | |
| 645 Scope *scd = sc->push(); | |
| 646 scd->sbreak = this; | |
| 647 scd->scontinue = this; | |
| 648 | |
| 649 for (size_t i = 0; i < statements->dim; i++) | |
| 650 { | |
| 651 Statement *s = (Statement *) statements->data[i]; | |
| 652 if (s) | |
| 653 { | |
| 654 s = s->semantic(scd); | |
| 655 statements->data[i] = s; | |
| 656 } | |
| 657 } | |
| 658 | |
| 659 scd->pop(); | |
| 660 sc->noctor--; | |
| 661 return this; | |
| 662 } | |
| 663 | |
| 664 void UnrolledLoopStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 665 { | |
| 666 buf->writestring("unrolled {"); | |
| 667 buf->writenl(); | |
| 668 | |
| 669 for (size_t i = 0; i < statements->dim; i++) | |
| 670 { Statement *s; | |
| 671 | |
| 672 s = (Statement *) statements->data[i]; | |
| 673 if (s) | |
| 674 s->toCBuffer(buf, hgs); | |
| 675 } | |
| 676 | |
| 677 buf->writeByte('}'); | |
| 678 buf->writenl(); | |
| 679 } | |
| 680 | |
| 681 int UnrolledLoopStatement::hasBreak() | |
| 682 { | |
| 683 return TRUE; | |
| 684 } | |
| 685 | |
| 686 int UnrolledLoopStatement::hasContinue() | |
| 687 { | |
| 688 return TRUE; | |
| 689 } | |
| 690 | |
| 691 int UnrolledLoopStatement::usesEH() | |
| 692 { | |
| 693 for (size_t i = 0; i < statements->dim; i++) | |
| 336 | 694 { Statement *s = (Statement *) statements->data[i]; |
| 159 | 695 if (s && s->usesEH()) |
| 696 return TRUE; | |
| 697 } | |
| 698 return FALSE; | |
| 699 } | |
| 700 | |
| 336 | 701 int UnrolledLoopStatement::blockExit() |
| 702 { | |
| 703 int result = BEfallthru; | |
| 704 for (size_t i = 0; i < statements->dim; i++) | |
| 705 { Statement *s = (Statement *) statements->data[i]; | |
| 706 if (s) | |
| 707 { | |
| 708 int r = s->blockExit(); | |
| 709 result |= r & ~(BEbreak | BEcontinue); | |
| 710 } | |
| 711 } | |
| 712 return result; | |
| 713 } | |
| 714 | |
| 159 | 715 int UnrolledLoopStatement::fallOffEnd() |
| 716 { | |
| 717 //printf("UnrolledLoopStatement::fallOffEnd()\n"); | |
| 718 for (size_t i = 0; i < statements->dim; i++) | |
| 719 { Statement *s = (Statement *)statements->data[i]; | |
| 720 | |
| 721 if (s) | |
| 722 s->fallOffEnd(); | |
| 723 } | |
| 724 return TRUE; | |
| 725 } | |
| 726 | |
| 727 int UnrolledLoopStatement::comeFrom() | |
| 728 { int comefrom = FALSE; | |
| 729 | |
| 730 //printf("UnrolledLoopStatement::comeFrom()\n"); | |
| 731 for (size_t i = 0; i < statements->dim; i++) | |
| 732 { Statement *s = (Statement *)statements->data[i]; | |
| 733 | |
| 734 if (!s) | |
| 735 continue; | |
| 736 | |
| 737 comefrom |= s->comeFrom(); | |
| 738 } | |
| 739 return comefrom; | |
| 740 } | |
| 741 | |
| 742 | |
| 743 /******************************** ScopeStatement ***************************/ | |
| 744 | |
| 745 ScopeStatement::ScopeStatement(Loc loc, Statement *s) | |
| 746 : Statement(loc) | |
| 747 { | |
| 748 this->statement = s; | |
| 749 } | |
| 750 | |
| 751 Statement *ScopeStatement::syntaxCopy() | |
| 752 { | |
| 753 Statement *s; | |
| 754 | |
| 755 s = statement ? statement->syntaxCopy() : NULL; | |
| 756 s = new ScopeStatement(loc, s); | |
| 757 return s; | |
| 758 } | |
| 759 | |
| 760 | |
| 761 Statement *ScopeStatement::semantic(Scope *sc) | |
| 762 { ScopeDsymbol *sym; | |
| 763 | |
| 764 //printf("ScopeStatement::semantic(sc = %p)\n", sc); | |
| 765 if (statement) | |
| 766 { Statements *a; | |
| 767 | |
| 768 sym = new ScopeDsymbol(); | |
| 769 sym->parent = sc->scopesym; | |
| 770 sc = sc->push(sym); | |
| 771 | |
| 772 a = statement->flatten(sc); | |
| 773 if (a) | |
| 774 { | |
| 775 statement = new CompoundStatement(loc, a); | |
| 776 } | |
| 777 | |
| 778 statement = statement->semantic(sc); | |
| 779 if (statement) | |
| 780 { | |
| 781 Statement *sentry; | |
| 782 Statement *sexception; | |
| 783 Statement *sfinally; | |
| 784 | |
| 785 statement->scopeCode(&sentry, &sexception, &sfinally); | |
| 786 if (sfinally) | |
| 787 { | |
| 788 //printf("adding sfinally\n"); | |
| 789 statement = new CompoundStatement(loc, statement, sfinally); | |
| 790 } | |
| 791 } | |
| 792 | |
| 793 sc->pop(); | |
| 794 } | |
| 795 return this; | |
| 796 } | |
| 797 | |
| 798 int ScopeStatement::hasBreak() | |
| 799 { | |
| 800 //printf("ScopeStatement::hasBreak() %s\n", toChars()); | |
| 801 return statement ? statement->hasBreak() : FALSE; | |
| 802 } | |
| 803 | |
| 804 int ScopeStatement::hasContinue() | |
| 805 { | |
| 806 return statement ? statement->hasContinue() : FALSE; | |
| 807 } | |
| 808 | |
| 809 int ScopeStatement::usesEH() | |
| 810 { | |
| 811 return statement ? statement->usesEH() : FALSE; | |
| 812 } | |
| 813 | |
| 336 | 814 int ScopeStatement::blockExit() |
| 815 { | |
| 816 //printf("ScopeStatement::blockExit(%p)\n", statement); | |
| 817 return statement ? statement->blockExit() : BEfallthru; | |
| 818 } | |
| 819 | |
| 159 | 820 int ScopeStatement::fallOffEnd() |
| 821 { | |
| 822 return statement ? statement->fallOffEnd() : TRUE; | |
| 823 } | |
| 824 | |
| 825 int ScopeStatement::comeFrom() | |
| 826 { | |
| 827 //printf("ScopeStatement::comeFrom()\n"); | |
| 828 return statement ? statement->comeFrom() : FALSE; | |
| 829 } | |
| 830 | |
| 831 void ScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 832 { | |
| 833 buf->writeByte('{'); | |
| 834 buf->writenl(); | |
| 835 | |
| 836 if (statement) | |
| 837 statement->toCBuffer(buf, hgs); | |
| 838 | |
| 839 buf->writeByte('}'); | |
| 840 buf->writenl(); | |
| 841 } | |
| 842 | |
| 843 /******************************** WhileStatement ***************************/ | |
| 844 | |
| 845 WhileStatement::WhileStatement(Loc loc, Expression *c, Statement *b) | |
| 846 : Statement(loc) | |
| 847 { | |
| 848 condition = c; | |
| 849 body = b; | |
| 309 | 850 enclosinghandler = NULL; |
| 159 | 851 } |
| 852 | |
| 853 Statement *WhileStatement::syntaxCopy() | |
| 854 { | |
| 855 WhileStatement *s = new WhileStatement(loc, condition->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
| 856 return s; | |
| 857 } | |
| 858 | |
| 859 | |
| 860 Statement *WhileStatement::semantic(Scope *sc) | |
| 861 { | |
| 862 #if 0 | |
| 863 if (condition->op == TOKmatch) | |
| 864 { | |
| 865 /* Rewrite while (condition) body as: | |
| 866 * if (condition) | |
| 867 * do | |
| 868 * body | |
| 869 * while ((_match = _match.opNext), _match); | |
| 870 */ | |
| 871 | |
| 872 Expression *ew = new IdentifierExp(0, Id::_match); | |
| 873 ew = new DotIdExp(0, ew, Id::next); | |
| 874 ew = new AssignExp(0, new IdentifierExp(0, Id::_match), ew); | |
| 875 ////ew = new EqualExp(TOKnotequal, 0, ew, new NullExp(0)); | |
| 876 Expression *ev = new IdentifierExp(0, Id::_match); | |
| 877 //ev = new CastExp(0, ev, Type::tvoidptr); | |
| 878 ew = new CommaExp(0, ew, ev); | |
| 879 Statement *sw = new DoStatement(loc, body, ew); | |
| 880 Statement *si = new IfStatement(loc, condition, sw, NULL); | |
| 881 return si->semantic(sc); | |
| 882 } | |
| 883 #endif | |
| 884 | |
| 309 | 885 enclosinghandler = sc->tfOfTry; |
| 159 | 886 |
| 887 condition = condition->semantic(sc); | |
| 888 condition = resolveProperties(sc, condition); | |
| 889 condition = condition->optimize(WANTvalue); | |
| 890 condition = condition->checkToBoolean(); | |
| 891 | |
| 892 sc->noctor++; | |
| 893 | |
| 894 Scope *scd = sc->push(); | |
| 895 scd->sbreak = this; | |
| 896 scd->scontinue = this; | |
| 897 if (body) | |
| 898 body = body->semantic(scd); | |
| 899 scd->pop(); | |
| 900 | |
| 901 sc->noctor--; | |
| 902 | |
| 903 return this; | |
| 904 } | |
| 905 | |
| 906 int WhileStatement::hasBreak() | |
| 907 { | |
| 908 return TRUE; | |
| 909 } | |
| 910 | |
| 911 int WhileStatement::hasContinue() | |
| 912 { | |
| 913 return TRUE; | |
| 914 } | |
| 915 | |
| 916 int WhileStatement::usesEH() | |
| 917 { | |
| 918 return body ? body->usesEH() : 0; | |
| 919 } | |
| 920 | |
| 336 | 921 int WhileStatement::blockExit() |
| 922 { | |
| 923 //printf("WhileStatement::blockExit(%p)\n", this); | |
| 924 | |
| 925 int result = BEnone; | |
| 926 if (condition->canThrow()) | |
| 927 result |= BEthrow; | |
| 928 if (condition->isBool(TRUE)) | |
| 929 { | |
| 930 if (body) | |
| 931 { result |= body->blockExit(); | |
| 932 if (result & BEbreak) | |
| 933 result |= BEfallthru; | |
| 934 } | |
| 935 } | |
| 936 else if (condition->isBool(FALSE)) | |
| 937 { | |
| 938 result |= BEfallthru; | |
| 939 } | |
| 940 else | |
| 941 { | |
| 942 if (body) | |
| 943 result |= body->blockExit(); | |
| 944 result |= BEfallthru; | |
| 945 } | |
| 946 result &= ~(BEbreak | BEcontinue); | |
| 947 return result; | |
| 948 } | |
| 949 | |
| 159 | 950 int WhileStatement::fallOffEnd() |
| 951 { | |
| 952 if (body) | |
| 953 body->fallOffEnd(); | |
| 954 return TRUE; | |
| 955 } | |
| 956 | |
| 957 int WhileStatement::comeFrom() | |
| 958 { | |
| 959 if (body) | |
| 960 return body->comeFrom(); | |
| 961 return FALSE; | |
| 962 } | |
| 963 | |
| 964 void WhileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 965 { | |
| 966 buf->writestring("while ("); | |
| 967 condition->toCBuffer(buf, hgs); | |
| 968 buf->writebyte(')'); | |
| 969 buf->writenl(); | |
| 970 if (body) | |
| 971 body->toCBuffer(buf, hgs); | |
| 972 } | |
| 973 | |
| 974 /******************************** DoStatement ***************************/ | |
| 975 | |
| 976 DoStatement::DoStatement(Loc loc, Statement *b, Expression *c) | |
| 977 : Statement(loc) | |
| 978 { | |
| 979 body = b; | |
| 980 condition = c; | |
| 309 | 981 enclosinghandler = NULL; |
| 159 | 982 } |
| 983 | |
| 984 Statement *DoStatement::syntaxCopy() | |
| 985 { | |
| 986 DoStatement *s = new DoStatement(loc, body ? body->syntaxCopy() : NULL, condition->syntaxCopy()); | |
| 987 return s; | |
| 988 } | |
| 989 | |
| 990 | |
| 991 Statement *DoStatement::semantic(Scope *sc) | |
| 992 { | |
| 309 | 993 enclosinghandler = sc->tfOfTry; |
| 159 | 994 |
| 995 sc->noctor++; | |
| 996 if (body) | |
| 997 body = body->semanticScope(sc, this, this); | |
| 998 sc->noctor--; | |
| 999 condition = condition->semantic(sc); | |
| 1000 condition = resolveProperties(sc, condition); | |
| 1001 condition = condition->optimize(WANTvalue); | |
| 1002 | |
| 1003 condition = condition->checkToBoolean(); | |
| 1004 | |
| 1005 return this; | |
| 1006 } | |
| 1007 | |
| 1008 int DoStatement::hasBreak() | |
| 1009 { | |
| 1010 return TRUE; | |
| 1011 } | |
| 1012 | |
| 1013 int DoStatement::hasContinue() | |
| 1014 { | |
| 1015 return TRUE; | |
| 1016 } | |
| 1017 | |
| 1018 int DoStatement::usesEH() | |
| 1019 { | |
| 1020 return body ? body->usesEH() : 0; | |
| 1021 } | |
| 1022 | |
| 336 | 1023 int DoStatement::blockExit() |
| 1024 { int result; | |
| 1025 | |
| 1026 if (body) | |
| 1027 { result = body->blockExit(); | |
| 1028 if (result == BEbreak) | |
| 1029 return BEfallthru; | |
| 1030 if (result & BEcontinue) | |
| 1031 result |= BEfallthru; | |
| 1032 } | |
| 1033 else | |
| 1034 result = BEfallthru; | |
| 1035 if (result & BEfallthru) | |
| 1036 { if (condition->canThrow()) | |
| 1037 result |= BEthrow; | |
| 1038 if (!(result & BEbreak) && condition->isBool(TRUE)) | |
| 1039 result &= ~BEfallthru; | |
| 1040 } | |
| 1041 result &= ~(BEbreak | BEcontinue); | |
| 1042 return result; | |
| 1043 } | |
| 1044 | |
| 159 | 1045 int DoStatement::fallOffEnd() |
| 1046 { | |
| 1047 if (body) | |
| 1048 body->fallOffEnd(); | |
| 1049 return TRUE; | |
| 1050 } | |
| 1051 | |
| 1052 int DoStatement::comeFrom() | |
| 1053 { | |
| 1054 if (body) | |
| 1055 return body->comeFrom(); | |
| 1056 return FALSE; | |
| 1057 } | |
| 1058 | |
| 1059 void DoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1060 { | |
| 1061 buf->writestring("do"); | |
| 1062 buf->writenl(); | |
| 1063 if (body) | |
| 1064 body->toCBuffer(buf, hgs); | |
| 1065 buf->writestring("while ("); | |
| 1066 condition->toCBuffer(buf, hgs); | |
| 1067 buf->writebyte(')'); | |
| 1068 } | |
| 1069 | |
| 1070 /******************************** ForStatement ***************************/ | |
| 1071 | |
| 1072 ForStatement::ForStatement(Loc loc, Statement *init, Expression *condition, Expression *increment, Statement *body) | |
| 1073 : Statement(loc) | |
| 1074 { | |
| 1075 this->init = init; | |
| 1076 this->condition = condition; | |
| 1077 this->increment = increment; | |
| 1078 this->body = body; | |
| 309 | 1079 this->enclosinghandler = NULL; |
| 159 | 1080 } |
| 1081 | |
| 1082 Statement *ForStatement::syntaxCopy() | |
| 1083 { | |
| 1084 Statement *i = NULL; | |
| 1085 if (init) | |
| 1086 i = init->syntaxCopy(); | |
| 1087 Expression *c = NULL; | |
| 1088 if (condition) | |
| 1089 c = condition->syntaxCopy(); | |
| 1090 Expression *inc = NULL; | |
| 1091 if (increment) | |
| 1092 inc = increment->syntaxCopy(); | |
| 1093 ForStatement *s = new ForStatement(loc, i, c, inc, body->syntaxCopy()); | |
| 1094 return s; | |
| 1095 } | |
| 1096 | |
| 1097 Statement *ForStatement::semantic(Scope *sc) | |
| 1098 { | |
| 309 | 1099 enclosinghandler = sc->tfOfTry; |
| 159 | 1100 |
| 1101 ScopeDsymbol *sym = new ScopeDsymbol(); | |
| 1102 sym->parent = sc->scopesym; | |
| 1103 sc = sc->push(sym); | |
| 1104 if (init) | |
| 1105 init = init->semantic(sc); | |
| 1106 if (!condition) | |
| 1107 // Use a default value | |
| 1108 condition = new IntegerExp(loc, 1, Type::tboolean); | |
| 1109 sc->noctor++; | |
| 1110 condition = condition->semantic(sc); | |
| 1111 condition = resolveProperties(sc, condition); | |
| 1112 condition = condition->optimize(WANTvalue); | |
| 1113 condition = condition->checkToBoolean(); | |
| 1114 if (increment) | |
| 1115 increment = increment->semantic(sc); | |
| 1116 | |
| 1117 sc->sbreak = this; | |
| 1118 sc->scontinue = this; | |
| 1119 body = body->semantic(sc); | |
| 1120 sc->noctor--; | |
| 1121 | |
| 1122 sc->pop(); | |
| 1123 return this; | |
| 1124 } | |
| 1125 | |
| 1126 void ForStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 1127 { | |
| 1128 //printf("ForStatement::scopeCode()\n"); | |
| 1129 //print(); | |
| 1130 if (init) | |
| 1131 init->scopeCode(sentry, sexception, sfinally); | |
| 1132 else | |
| 1133 Statement::scopeCode(sentry, sexception, sfinally); | |
| 1134 } | |
| 1135 | |
| 1136 int ForStatement::hasBreak() | |
| 1137 { | |
| 1138 //printf("ForStatement::hasBreak()\n"); | |
| 1139 return TRUE; | |
| 1140 } | |
| 1141 | |
| 1142 int ForStatement::hasContinue() | |
| 1143 { | |
| 1144 return TRUE; | |
| 1145 } | |
| 1146 | |
| 1147 int ForStatement::usesEH() | |
| 1148 { | |
| 1149 return (init && init->usesEH()) || body->usesEH(); | |
| 1150 } | |
| 1151 | |
| 336 | 1152 int ForStatement::blockExit() |
| 1153 { int result = BEfallthru; | |
| 1154 | |
| 1155 if (init) | |
| 1156 { result = init->blockExit(); | |
| 1157 if (!(result & BEfallthru)) | |
| 1158 return result; | |
| 1159 } | |
| 1160 if (condition) | |
| 1161 { if (condition->canThrow()) | |
| 1162 result |= BEthrow; | |
| 1163 } | |
| 1164 else | |
| 1165 result &= ~BEfallthru; // the body must do the exiting | |
| 1166 if (body) | |
| 1167 { int r = body->blockExit(); | |
| 1168 if (r & BEbreak) | |
| 1169 result |= BEfallthru; | |
| 1170 result |= r & ~(BEbreak | BEcontinue); | |
| 1171 } | |
| 1172 if (increment && increment->canThrow()) | |
| 1173 result |= BEthrow; | |
| 1174 return result; | |
| 1175 } | |
| 1176 | |
| 159 | 1177 int ForStatement::fallOffEnd() |
| 1178 { | |
| 1179 if (body) | |
| 1180 body->fallOffEnd(); | |
| 1181 return TRUE; | |
| 1182 } | |
| 1183 | |
| 1184 int ForStatement::comeFrom() | |
| 1185 { | |
| 1186 //printf("ForStatement::comeFrom()\n"); | |
| 1187 if (body) | |
| 1188 { int result = body->comeFrom(); | |
| 1189 //printf("result = %d\n", result); | |
| 1190 return result; | |
| 1191 } | |
| 1192 return FALSE; | |
| 1193 } | |
| 1194 | |
| 1195 void ForStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1196 { | |
| 1197 buf->writestring("for ("); | |
| 1198 if (init) | |
| 1199 { | |
| 1200 hgs->FLinit.init++; | |
| 1201 hgs->FLinit.decl = 0; | |
| 1202 init->toCBuffer(buf, hgs); | |
| 1203 if (hgs->FLinit.decl > 0) | |
| 1204 buf->writebyte(';'); | |
| 1205 hgs->FLinit.decl = 0; | |
| 1206 hgs->FLinit.init--; | |
| 1207 } | |
| 1208 else | |
| 1209 buf->writebyte(';'); | |
| 1210 if (condition) | |
| 1211 { buf->writebyte(' '); | |
| 1212 condition->toCBuffer(buf, hgs); | |
| 1213 } | |
| 1214 buf->writebyte(';'); | |
| 1215 if (increment) | |
| 1216 { buf->writebyte(' '); | |
| 1217 increment->toCBuffer(buf, hgs); | |
| 1218 } | |
| 1219 buf->writebyte(')'); | |
| 1220 buf->writenl(); | |
| 1221 buf->writebyte('{'); | |
| 1222 buf->writenl(); | |
| 1223 body->toCBuffer(buf, hgs); | |
| 1224 buf->writebyte('}'); | |
| 1225 buf->writenl(); | |
| 1226 } | |
| 1227 | |
| 1228 /******************************** ForeachStatement ***************************/ | |
| 1229 | |
| 1230 ForeachStatement::ForeachStatement(Loc loc, enum TOK op, Arguments *arguments, | |
| 1231 Expression *aggr, Statement *body) | |
| 1232 : Statement(loc) | |
| 1233 { | |
| 1234 this->op = op; | |
| 1235 this->arguments = arguments; | |
| 1236 this->aggr = aggr; | |
| 1237 this->body = body; | |
| 309 | 1238 this->enclosinghandler = NULL; |
| 159 | 1239 |
| 1240 this->key = NULL; | |
| 1241 this->value = NULL; | |
| 1242 | |
| 1243 this->func = NULL; | |
| 1244 } | |
| 1245 | |
| 1246 Statement *ForeachStatement::syntaxCopy() | |
| 1247 { | |
| 1248 Arguments *args = Argument::arraySyntaxCopy(arguments); | |
| 1249 Expression *exp = aggr->syntaxCopy(); | |
| 1250 ForeachStatement *s = new ForeachStatement(loc, op, args, exp, | |
| 1251 body ? body->syntaxCopy() : NULL); | |
| 1252 return s; | |
| 1253 } | |
| 1254 | |
| 1255 Statement *ForeachStatement::semantic(Scope *sc) | |
| 1256 { | |
| 1257 //printf("ForeachStatement::semantic() %p\n", this); | |
| 1258 ScopeDsymbol *sym; | |
| 1259 Statement *s = this; | |
| 1260 int dim = arguments->dim; | |
| 1261 int i; | |
| 1262 TypeAArray *taa = NULL; | |
| 1263 | |
| 1264 Type *tn = NULL; | |
| 1265 Type *tnv = NULL; | |
| 1266 | |
| 309 | 1267 enclosinghandler = sc->tfOfTry; |
| 159 | 1268 |
| 1269 func = sc->func; | |
| 1270 if (func->fes) | |
| 1271 func = func->fes->func; | |
| 1272 | |
| 1273 aggr = aggr->semantic(sc); | |
| 1274 aggr = resolveProperties(sc, aggr); | |
| 1275 if (!aggr->type) | |
| 1276 { | |
| 1277 error("invalid foreach aggregate %s", aggr->toChars()); | |
| 1278 return this; | |
| 1279 } | |
| 1280 | |
| 1281 inferApplyArgTypes(op, arguments, aggr); | |
| 1282 | |
| 1283 /* Check for inference errors | |
| 1284 */ | |
| 1285 if (dim != arguments->dim) | |
| 1286 { | |
| 1287 //printf("dim = %d, arguments->dim = %d\n", dim, arguments->dim); | |
| 1288 error("cannot uniquely infer foreach argument types"); | |
| 1289 return this; | |
| 1290 } | |
| 1291 | |
| 1292 Type *tab = aggr->type->toBasetype(); | |
| 1293 | |
| 1294 if (tab->ty == Ttuple) // don't generate new scope for tuple loops | |
| 1295 { | |
| 1296 if (dim < 1 || dim > 2) | |
| 1297 { | |
| 1298 error("only one (value) or two (key,value) arguments for tuple foreach"); | |
| 1299 return s; | |
| 1300 } | |
| 1301 | |
| 1302 TypeTuple *tuple = (TypeTuple *)tab; | |
| 1303 Statements *statements = new Statements(); | |
| 1304 //printf("aggr: op = %d, %s\n", aggr->op, aggr->toChars()); | |
| 1305 size_t n; | |
| 1306 TupleExp *te = NULL; | |
| 1307 if (aggr->op == TOKtuple) // expression tuple | |
| 1308 { te = (TupleExp *)aggr; | |
| 1309 n = te->exps->dim; | |
| 1310 } | |
| 1311 else if (aggr->op == TOKtype) // type tuple | |
| 1312 { | |
| 1313 n = Argument::dim(tuple->arguments); | |
| 1314 } | |
| 1315 else | |
| 1316 assert(0); | |
| 1317 for (size_t j = 0; j < n; j++) | |
| 1318 { size_t k = (op == TOKforeach) ? j : n - 1 - j; | |
| 1319 Expression *e; | |
| 1320 Type *t; | |
| 1321 if (te) | |
| 1322 e = (Expression *)te->exps->data[k]; | |
| 1323 else | |
| 1324 t = Argument::getNth(tuple->arguments, k)->type; | |
| 1325 Argument *arg = (Argument *)arguments->data[0]; | |
| 1326 Statements *st = new Statements(); | |
| 1327 | |
| 1328 if (dim == 2) | |
| 1329 { // Declare key | |
| 1330 if (arg->storageClass & (STCout | STCref | STClazy)) | |
| 1331 error("no storage class for key %s", arg->ident->toChars()); | |
| 1332 TY keyty = arg->type->ty; | |
|
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1333 if (global.params.is64bit) |
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1334 { |
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1335 if (keyty != Tint32 && keyty != Tuns32 && keyty != Tint64 && keyty != Tuns64) |
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1336 { |
|
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1337 error("foreach: key type must be int, uint, long or ulong, not %s", key->type->toChars()); |
|
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1338 } |
|
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1339 } |
|
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|
1340 else if (keyty != Tint32 && keyty != Tuns32) |
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1341 { |
|
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|
1342 error("foreach: key type must be int or uint, not %s", key->type->toChars()); |
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1343 } |
| 159 | 1344 Initializer *ie = new ExpInitializer(0, new IntegerExp(k)); |
| 1345 VarDeclaration *var = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
| 1346 var->storage_class |= STCconst; | |
| 1347 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1348 st->push(new ExpStatement(loc, de)); | |
| 1349 arg = (Argument *)arguments->data[1]; // value | |
| 1350 } | |
| 1351 // Declare value | |
| 1352 if (arg->storageClass & (STCout | STCref | STClazy)) | |
| 1353 error("no storage class for value %s", arg->ident->toChars()); | |
| 1354 Dsymbol *var; | |
| 1355 if (te) | |
| 1356 { | |
| 1357 if (e->type->toBasetype()->ty == Tfunction && | |
| 1358 e->op == TOKvar) | |
| 1359 { VarExp *ve = (VarExp *)e; | |
| 1360 var = new AliasDeclaration(loc, arg->ident, ve->var); | |
| 1361 } | |
| 1362 else | |
| 1363 { | |
| 1364 arg->type = e->type; | |
| 1365 Initializer *ie = new ExpInitializer(0, e); | |
| 1366 VarDeclaration *v = new VarDeclaration(loc, arg->type, arg->ident, ie); | |
| 1367 if (e->isConst()) | |
| 1368 v->storage_class |= STCconst; | |
| 1369 var = v; | |
| 1370 } | |
| 1371 } | |
| 1372 else | |
| 1373 { | |
| 1374 var = new AliasDeclaration(loc, arg->ident, t); | |
| 1375 } | |
| 1376 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1377 st->push(new ExpStatement(loc, de)); | |
| 1378 | |
| 1379 st->push(body->syntaxCopy()); | |
| 1380 s = new CompoundStatement(loc, st); | |
| 1381 s = new ScopeStatement(loc, s); | |
| 1382 statements->push(s); | |
| 1383 } | |
| 1384 | |
| 1385 s = new UnrolledLoopStatement(loc, statements); | |
| 1386 s = s->semantic(sc); | |
| 1387 return s; | |
| 1388 } | |
| 1389 | |
| 1390 for (i = 0; i < dim; i++) | |
| 1391 { Argument *arg = (Argument *)arguments->data[i]; | |
| 1392 if (!arg->type) | |
| 1393 { | |
| 1394 error("cannot infer type for %s", arg->ident->toChars()); | |
| 1395 return this; | |
| 1396 } | |
| 1397 } | |
| 1398 | |
| 1399 sym = new ScopeDsymbol(); | |
| 1400 sym->parent = sc->scopesym; | |
| 1401 sc = sc->push(sym); | |
| 1402 | |
| 1403 sc->noctor++; | |
| 1404 | |
| 1405 switch (tab->ty) | |
| 1406 { | |
| 1407 case Tarray: | |
| 1408 case Tsarray: | |
| 1409 if (dim < 1 || dim > 2) | |
| 1410 { | |
| 1411 error("only one or two arguments for array foreach"); | |
| 1412 break; | |
| 1413 } | |
| 1414 | |
| 1415 /* Look for special case of parsing char types out of char type | |
| 1416 * array. | |
| 1417 */ | |
| 1418 tn = tab->nextOf()->toBasetype(); | |
| 1419 if (tn->ty == Tchar || tn->ty == Twchar || tn->ty == Tdchar) | |
| 1420 { Argument *arg; | |
| 1421 | |
| 1422 i = (dim == 1) ? 0 : 1; // index of value | |
| 1423 arg = (Argument *)arguments->data[i]; | |
| 1424 arg->type = arg->type->semantic(loc, sc); | |
| 1425 tnv = arg->type->toBasetype(); | |
| 1426 if (tnv->ty != tn->ty && | |
| 1427 (tnv->ty == Tchar || tnv->ty == Twchar || tnv->ty == Tdchar)) | |
| 1428 { | |
| 1429 if (arg->storageClass & STCref) | |
| 1430 error("foreach: value of UTF conversion cannot be ref"); | |
| 1431 if (dim == 2) | |
| 1432 { arg = (Argument *)arguments->data[0]; | |
| 1433 if (arg->storageClass & STCref) | |
| 1434 error("foreach: key cannot be ref"); | |
| 1435 } | |
| 1436 goto Lapply; | |
| 1437 } | |
| 1438 } | |
| 1439 | |
| 1440 for (i = 0; i < dim; i++) | |
| 1441 { // Declare args | |
| 1442 Argument *arg = (Argument *)arguments->data[i]; | |
| 1443 VarDeclaration *var; | |
| 1444 | |
| 1445 var = new VarDeclaration(loc, arg->type, arg->ident, NULL); | |
| 1446 var->storage_class |= STCforeach; | |
| 1447 var->storage_class |= arg->storageClass & (STCin | STCout | STCref); | |
| 1448 #if 1 | |
| 1449 DeclarationExp *de = new DeclarationExp(loc, var); | |
| 1450 de->semantic(sc); | |
| 1451 #else | |
| 1452 var->semantic(sc); | |
| 1453 if (!sc->insert(var)) | |
| 1454 error("%s already defined", var->ident->toChars()); | |
| 1455 #endif | |
| 1456 if (dim == 2 && i == 0) | |
| 1457 key = var; | |
| 1458 else | |
| 1459 value = var; | |
| 1460 } | |
| 1461 | |
| 1462 sc->sbreak = this; | |
| 1463 sc->scontinue = this; | |
| 1464 body = body->semantic(sc); | |
| 1465 | |
| 1466 if (!value->type->equals(tab->next)) | |
| 1467 { | |
| 1468 if (aggr->op == TOKstring) | |
| 1469 aggr = aggr->implicitCastTo(sc, value->type->arrayOf()); | |
| 1470 else | |
| 1471 error("foreach: %s is not an array of %s", tab->toChars(), value->type->toChars()); | |
| 1472 } | |
| 1473 | |
|
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|
1474 if (key) |
|
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1475 { |
|
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|
1476 if (global.params.is64bit) |
|
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|
1477 { |
|
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|
1478 if (key->type->ty != Tint32 && key->type->ty != Tuns32 && key->type->ty != Tint64 && key->type->ty != Tuns64) |
|
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1479 { |
|
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|
1480 error("foreach: key type must be int, uint, long or ulong, not %s", key->type->toChars()); |
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1481 } |
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1482 } |
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1483 else if (key->type->ty != Tint32 && key->type->ty != Tuns32) |
|
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1484 { |
|
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|
1485 error("foreach: key type must be int or uint, not %s", key->type->toChars()); |
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1486 } |
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1487 } |
| 159 | 1488 |
| 1489 if (key && key->storage_class & (STCout | STCref)) | |
| 1490 error("foreach: key cannot be out or ref"); | |
| 1491 break; | |
| 1492 | |
| 1493 case Taarray: | |
| 1494 taa = (TypeAArray *)tab; | |
| 1495 if (dim < 1 || dim > 2) | |
| 1496 { | |
| 1497 error("only one or two arguments for associative array foreach"); | |
| 1498 break; | |
| 1499 } | |
| 1500 if (op == TOKforeach_reverse) | |
| 1501 { | |
| 1502 error("no reverse iteration on associative arrays"); | |
| 1503 } | |
| 1504 goto Lapply; | |
| 1505 | |
| 1506 case Tclass: | |
| 1507 case Tstruct: | |
| 1508 case Tdelegate: | |
| 1509 Lapply: | |
| 1510 { FuncDeclaration *fdapply; | |
| 1511 Arguments *args; | |
| 1512 Expression *ec; | |
| 1513 Expression *e; | |
| 1514 FuncLiteralDeclaration *fld; | |
| 1515 Argument *a; | |
| 1516 Type *t; | |
| 1517 Expression *flde; | |
| 1518 Identifier *id; | |
| 1519 Type *tret; | |
| 1520 | |
| 1521 tret = func->type->nextOf(); | |
| 1522 | |
| 1523 // Need a variable to hold value from any return statements in body. | |
| 1524 if (!sc->func->vresult && tret && tret != Type::tvoid) | |
| 1525 { VarDeclaration *v; | |
| 1526 | |
| 1527 v = new VarDeclaration(loc, tret, Id::result, NULL); | |
| 1528 v->noauto = 1; | |
| 1529 v->semantic(sc); | |
| 1530 if (!sc->insert(v)) | |
| 1531 assert(0); | |
| 1532 v->parent = sc->func; | |
| 1533 sc->func->vresult = v; | |
| 1534 } | |
| 1535 | |
| 1536 /* Turn body into the function literal: | |
| 1537 * int delegate(ref T arg) { body } | |
| 1538 */ | |
| 1539 args = new Arguments(); | |
| 1540 for (i = 0; i < dim; i++) | |
| 1541 { Argument *arg = (Argument *)arguments->data[i]; | |
| 1542 | |
| 1543 arg->type = arg->type->semantic(loc, sc); | |
| 1544 if (arg->storageClass & STCref) | |
| 1545 id = arg->ident; | |
| 1546 else | |
| 1547 { // Make a copy of the ref argument so it isn't | |
| 1548 // a reference. | |
| 1549 VarDeclaration *v; | |
| 1550 Initializer *ie; | |
| 1551 char applyArg[10 + sizeof(i)*3 + 1]; | |
| 1552 | |
| 1553 sprintf(applyArg, "__applyArg%d", i); | |
| 1554 id = Lexer::idPool(applyArg); | |
| 1555 | |
| 1556 ie = new ExpInitializer(0, new IdentifierExp(0, id)); | |
| 1557 v = new VarDeclaration(0, arg->type, arg->ident, ie); | |
| 1558 s = new DeclarationStatement(0, v); | |
| 1559 body = new CompoundStatement(loc, s, body); | |
| 1560 } | |
| 1561 a = new Argument(STCref, arg->type, id, NULL); | |
| 1562 args->push(a); | |
| 1563 } | |
| 1564 t = new TypeFunction(args, Type::tint32, 0, LINKd); | |
| 1565 fld = new FuncLiteralDeclaration(loc, 0, t, TOKdelegate, this); | |
| 1566 fld->fbody = body; | |
| 1567 flde = new FuncExp(loc, fld); | |
| 1568 flde = flde->semantic(sc); | |
| 1569 | |
| 1570 // Resolve any forward referenced goto's | |
| 1571 for (int i = 0; i < gotos.dim; i++) | |
| 1572 { CompoundStatement *cs = (CompoundStatement *)gotos.data[i]; | |
| 1573 GotoStatement *gs = (GotoStatement *)cs->statements->data[0]; | |
| 1574 | |
| 1575 if (!gs->label->statement) | |
| 1576 { // 'Promote' it to this scope, and replace with a return | |
| 1577 cases.push(gs); | |
| 1578 s = new ReturnStatement(0, new IntegerExp(cases.dim + 1)); | |
| 1579 cs->statements->data[0] = (void *)s; | |
| 1580 } | |
| 1581 } | |
| 1582 | |
| 1583 if (tab->ty == Taarray) | |
| 1584 { | |
| 1585 // Check types | |
| 1586 Argument *arg = (Argument *)arguments->data[0]; | |
| 1587 if (dim == 2) | |
| 1588 { | |
| 1589 if (arg->storageClass & STCref) | |
| 1590 error("foreach: index cannot be ref"); | |
| 1591 if (!arg->type->equals(taa->index)) | |
| 1592 error("foreach: index must be type %s, not %s", taa->index->toChars(), arg->type->toChars()); | |
| 1593 arg = (Argument *)arguments->data[1]; | |
| 1594 } | |
| 1595 if (!arg->type->equals(taa->nextOf())) | |
| 1596 error("foreach: value must be type %s, not %s", taa->nextOf()->toChars(), arg->type->toChars()); | |
| 1597 | |
| 1598 /* Call: | |
| 1599 * _aaApply(aggr, keysize, flde) | |
| 1600 */ | |
| 1601 if (dim == 2) | |
| 1602 fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply2"); | |
| 1603 else | |
| 1604 fdapply = FuncDeclaration::genCfunc(Type::tindex, "_aaApply"); | |
| 1605 fdapply->runTimeHack = true; | |
| 1606 ec = new VarExp(0, fdapply); | |
| 1607 Expressions *exps = new Expressions(); | |
| 1608 exps->push(aggr); | |
| 1609 size_t keysize = taa->key->size(); | |
| 1610 keysize = (keysize + 3) & ~3; | |
| 1611 exps->push(new IntegerExp(0, keysize, Type::tsize_t)); | |
| 1612 exps->push(flde); | |
| 1613 e = new CallExp(loc, ec, exps); | |
| 1614 e->type = Type::tindex; // don't run semantic() on e | |
| 1615 } | |
| 1616 else if (tab->ty == Tarray || tab->ty == Tsarray) | |
| 1617 { | |
| 1618 /* Call: | |
| 1619 * _aApply(aggr, flde) | |
| 1620 */ | |
| 1621 static char fntab[9][3] = | |
| 1622 { "cc","cw","cd", | |
| 1623 "wc","cc","wd", | |
| 1624 "dc","dw","dd" | |
| 1625 }; | |
| 1626 char fdname[7+1+2+ sizeof(dim)*3 + 1]; | |
| 1627 int flag; | |
| 1628 | |
| 1629 switch (tn->ty) | |
| 1630 { | |
| 1631 case Tchar: flag = 0; break; | |
| 1632 case Twchar: flag = 3; break; | |
| 1633 case Tdchar: flag = 6; break; | |
| 1634 default: assert(0); | |
| 1635 } | |
| 1636 switch (tnv->ty) | |
| 1637 { | |
| 1638 case Tchar: flag += 0; break; | |
| 1639 case Twchar: flag += 1; break; | |
| 1640 case Tdchar: flag += 2; break; | |
| 1641 default: assert(0); | |
| 1642 } | |
| 1643 const char *r = (op == TOKforeach_reverse) ? "R" : ""; | |
| 1644 int j = sprintf(fdname, "_aApply%s%.*s%d", r, 2, fntab[flag], dim); | |
| 1645 assert(j < sizeof(fdname)); | |
| 1646 fdapply = FuncDeclaration::genCfunc(Type::tindex, fdname); | |
| 1647 fdapply->runTimeHack = true; | |
| 1648 | |
| 1649 ec = new VarExp(0, fdapply); | |
| 1650 Expressions *exps = new Expressions(); | |
| 1651 if (tab->ty == Tsarray) | |
| 1652 aggr = aggr->castTo(sc, tn->arrayOf()); | |
| 1653 exps->push(aggr); | |
| 1654 exps->push(flde); | |
| 1655 e = new CallExp(loc, ec, exps); | |
| 1656 e->type = Type::tindex; // don't run semantic() on e | |
| 1657 } | |
| 1658 else if (tab->ty == Tdelegate) | |
| 1659 { | |
| 1660 /* Call: | |
| 1661 * aggr(flde) | |
| 1662 */ | |
| 1663 Expressions *exps = new Expressions(); | |
| 1664 exps->push(flde); | |
| 1665 e = new CallExp(loc, aggr, exps); | |
| 1666 e = e->semantic(sc); | |
| 1667 if (e->type != Type::tint32) | |
| 1668 error("opApply() function for %s must return an int", tab->toChars()); | |
| 1669 } | |
| 1670 else | |
| 1671 { | |
| 1672 /* Call: | |
| 1673 * aggr.apply(flde) | |
| 1674 */ | |
| 1675 ec = new DotIdExp(loc, aggr, | |
| 1676 (op == TOKforeach_reverse) ? Id::applyReverse | |
| 1677 : Id::apply); | |
| 1678 Expressions *exps = new Expressions(); | |
| 1679 exps->push(flde); | |
| 1680 e = new CallExp(loc, ec, exps); | |
| 1681 e = e->semantic(sc); | |
| 1682 if (e->type != Type::tint32) | |
| 1683 error("opApply() function for %s must return an int", tab->toChars()); | |
| 1684 } | |
| 1685 | |
| 1686 if (!cases.dim) | |
| 1687 // Easy case, a clean exit from the loop | |
| 1688 s = new ExpStatement(loc, e); | |
| 1689 else | |
| 1690 { // Construct a switch statement around the return value | |
| 1691 // of the apply function. | |
| 1692 Statements *a = new Statements(); | |
| 1693 | |
| 1694 // default: break; takes care of cases 0 and 1 | |
| 1695 s = new BreakStatement(0, NULL); | |
| 1696 s = new DefaultStatement(0, s); | |
| 1697 a->push(s); | |
| 1698 | |
| 1699 // cases 2... | |
| 1700 for (int i = 0; i < cases.dim; i++) | |
| 1701 { | |
| 1702 s = (Statement *)cases.data[i]; | |
| 1703 s = new CaseStatement(0, new IntegerExp(i + 2), s); | |
| 1704 a->push(s); | |
| 1705 } | |
| 1706 | |
| 1707 s = new CompoundStatement(loc, a); | |
| 1708 s = new SwitchStatement(loc, e, s); | |
| 1709 s = s->semantic(sc); | |
| 1710 } | |
| 1711 break; | |
| 1712 } | |
| 1713 | |
| 1714 default: | |
| 1715 error("foreach: %s is not an aggregate type", aggr->type->toChars()); | |
| 1716 break; | |
| 1717 } | |
| 1718 sc->noctor--; | |
| 1719 sc->pop(); | |
| 1720 return s; | |
| 1721 } | |
| 1722 | |
| 1723 int ForeachStatement::hasBreak() | |
| 1724 { | |
| 1725 return TRUE; | |
| 1726 } | |
| 1727 | |
| 1728 int ForeachStatement::hasContinue() | |
| 1729 { | |
| 1730 return TRUE; | |
| 1731 } | |
| 1732 | |
| 1733 int ForeachStatement::usesEH() | |
| 1734 { | |
| 1735 return body->usesEH(); | |
| 1736 } | |
| 1737 | |
| 336 | 1738 int ForeachStatement::blockExit() |
| 1739 { int result = BEfallthru; | |
| 1740 | |
| 1741 if (aggr->canThrow()) | |
| 1742 result |= BEthrow; | |
| 1743 | |
| 1744 if (body) | |
| 1745 { | |
| 1746 result |= body->blockExit() & ~(BEbreak | BEcontinue); | |
| 1747 } | |
| 1748 return result; | |
| 1749 } | |
| 1750 | |
| 159 | 1751 int ForeachStatement::fallOffEnd() |
| 1752 { | |
| 1753 if (body) | |
| 1754 body->fallOffEnd(); | |
| 1755 return TRUE; | |
| 1756 } | |
| 1757 | |
| 1758 int ForeachStatement::comeFrom() | |
| 1759 { | |
| 1760 if (body) | |
| 1761 return body->comeFrom(); | |
| 1762 return FALSE; | |
| 1763 } | |
| 1764 | |
| 1765 void ForeachStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1766 { | |
| 1767 buf->writestring(Token::toChars(op)); | |
| 1768 buf->writestring(" ("); | |
| 1769 for (int i = 0; i < arguments->dim; i++) | |
| 1770 { | |
| 1771 Argument *a = (Argument *)arguments->data[i]; | |
| 1772 if (i) | |
| 1773 buf->writestring(", "); | |
| 1774 if (a->storageClass & STCref) | |
| 1775 buf->writestring((global.params.Dversion == 1) | |
| 1776 ? (char*)"inout " : (char*)"ref "); | |
| 1777 if (a->type) | |
| 1778 a->type->toCBuffer(buf, a->ident, hgs); | |
| 1779 else | |
| 1780 buf->writestring(a->ident->toChars()); | |
| 1781 } | |
| 1782 buf->writestring("; "); | |
| 1783 aggr->toCBuffer(buf, hgs); | |
| 1784 buf->writebyte(')'); | |
| 1785 buf->writenl(); | |
| 1786 buf->writebyte('{'); | |
| 1787 buf->writenl(); | |
| 1788 if (body) | |
| 1789 body->toCBuffer(buf, hgs); | |
| 1790 buf->writebyte('}'); | |
| 1791 buf->writenl(); | |
| 1792 } | |
| 1793 | |
| 1794 /******************************** IfStatement ***************************/ | |
| 1795 | |
| 1796 IfStatement::IfStatement(Loc loc, Argument *arg, Expression *condition, Statement *ifbody, Statement *elsebody) | |
| 1797 : Statement(loc) | |
| 1798 { | |
| 1799 this->arg = arg; | |
| 1800 this->condition = condition; | |
| 1801 this->ifbody = ifbody; | |
| 1802 this->elsebody = elsebody; | |
| 1803 this->match = NULL; | |
| 1804 } | |
| 1805 | |
| 1806 Statement *IfStatement::syntaxCopy() | |
| 1807 { | |
| 1808 Statement *i = NULL; | |
| 1809 if (ifbody) | |
| 1810 i = ifbody->syntaxCopy(); | |
| 1811 | |
| 1812 Statement *e = NULL; | |
| 1813 if (elsebody) | |
| 1814 e = elsebody->syntaxCopy(); | |
| 1815 | |
| 1816 Argument *a = arg ? arg->syntaxCopy() : NULL; | |
| 1817 IfStatement *s = new IfStatement(loc, a, condition->syntaxCopy(), i, e); | |
| 1818 return s; | |
| 1819 } | |
| 1820 | |
| 1821 Statement *IfStatement::semantic(Scope *sc) | |
| 1822 { | |
| 1823 condition = condition->semantic(sc); | |
| 1824 condition = resolveProperties(sc, condition); | |
| 1825 condition = condition->checkToBoolean(); | |
| 1826 | |
| 1827 // If we can short-circuit evaluate the if statement, don't do the | |
| 1828 // semantic analysis of the skipped code. | |
| 1829 // This feature allows a limited form of conditional compilation. | |
| 1830 condition = condition->optimize(WANTflags); | |
| 1831 | |
| 1832 // Evaluate at runtime | |
| 1833 unsigned cs0 = sc->callSuper; | |
| 1834 unsigned cs1; | |
| 1835 | |
| 1836 Scope *scd; | |
| 1837 if (arg) | |
| 1838 { /* Declare arg, which we will set to be the | |
| 1839 * result of condition. | |
| 1840 */ | |
| 1841 ScopeDsymbol *sym = new ScopeDsymbol(); | |
| 1842 sym->parent = sc->scopesym; | |
| 1843 scd = sc->push(sym); | |
| 1844 | |
| 1845 Type *t = arg->type ? arg->type : condition->type; | |
| 1846 match = new VarDeclaration(loc, t, arg->ident, NULL); | |
| 1847 match->noauto = 1; | |
| 1848 match->semantic(scd); | |
| 1849 if (!scd->insert(match)) | |
| 1850 assert(0); | |
| 1851 match->parent = sc->func; | |
| 1852 | |
| 1853 /* Generate: | |
| 1854 * (arg = condition) | |
| 1855 */ | |
| 1856 VarExp *v = new VarExp(0, match); | |
| 1857 condition = new AssignExp(loc, v, condition); | |
| 1858 condition = condition->semantic(scd); | |
| 1859 } | |
| 1860 else | |
| 1861 scd = sc->push(); | |
| 1862 ifbody = ifbody->semantic(scd); | |
| 1863 scd->pop(); | |
| 1864 | |
| 1865 cs1 = sc->callSuper; | |
| 1866 sc->callSuper = cs0; | |
| 1867 if (elsebody) | |
| 1868 elsebody = elsebody->semanticScope(sc, NULL, NULL); | |
| 1869 sc->mergeCallSuper(loc, cs1); | |
| 1870 | |
| 1871 return this; | |
| 1872 } | |
| 1873 | |
| 1874 int IfStatement::usesEH() | |
| 1875 { | |
| 1876 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
| 1877 } | |
| 1878 | |
| 336 | 1879 int IfStatement::blockExit() |
| 1880 { | |
| 1881 //printf("IfStatement::blockExit(%p)\n", this); | |
| 1882 | |
| 1883 int result = BEnone; | |
| 1884 if (condition->canThrow()) | |
| 1885 result |= BEthrow; | |
| 1886 if (condition->isBool(TRUE)) | |
| 1887 { | |
| 1888 if (ifbody) | |
| 1889 result |= ifbody->blockExit(); | |
| 1890 else | |
| 1891 result |= BEfallthru; | |
| 1892 } | |
| 1893 else if (condition->isBool(FALSE)) | |
| 1894 { | |
| 1895 if (elsebody) | |
| 1896 result |= elsebody->blockExit(); | |
| 1897 else | |
| 1898 result |= BEfallthru; | |
| 1899 } | |
| 1900 else | |
| 1901 { | |
| 1902 if (ifbody) | |
| 1903 result |= ifbody->blockExit(); | |
| 1904 else | |
| 1905 result |= BEfallthru; | |
| 1906 if (elsebody) | |
| 1907 result |= elsebody->blockExit(); | |
| 1908 else | |
| 1909 result |= BEfallthru; | |
| 1910 } | |
| 1911 //printf("IfStatement::blockExit(%p) = x%x\n", this, result); | |
| 1912 return result; | |
| 1913 } | |
| 1914 | |
| 159 | 1915 int IfStatement::fallOffEnd() |
| 1916 { | |
| 1917 if (!ifbody || ifbody->fallOffEnd() || | |
| 1918 !elsebody || elsebody->fallOffEnd()) | |
| 1919 return TRUE; | |
| 1920 return FALSE; | |
| 1921 } | |
| 1922 | |
| 1923 | |
| 1924 void IfStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 1925 { | |
| 1926 buf->writestring("if ("); | |
| 1927 if (arg) | |
| 1928 { | |
| 1929 if (arg->type) | |
| 1930 arg->type->toCBuffer(buf, arg->ident, hgs); | |
| 1931 else | |
| 1932 buf->writestring(arg->ident->toChars()); | |
| 1933 buf->writebyte(';'); | |
| 1934 } | |
| 1935 condition->toCBuffer(buf, hgs); | |
| 1936 buf->writebyte(')'); | |
| 1937 buf->writenl(); | |
| 1938 ifbody->toCBuffer(buf, hgs); | |
| 1939 if (elsebody) | |
| 1940 { buf->writestring("else"); | |
| 1941 buf->writenl(); | |
| 1942 elsebody->toCBuffer(buf, hgs); | |
| 1943 } | |
| 1944 } | |
| 1945 | |
| 1946 /******************************** ConditionalStatement ***************************/ | |
| 1947 | |
| 1948 ConditionalStatement::ConditionalStatement(Loc loc, Condition *condition, Statement *ifbody, Statement *elsebody) | |
| 1949 : Statement(loc) | |
| 1950 { | |
| 1951 this->condition = condition; | |
| 1952 this->ifbody = ifbody; | |
| 1953 this->elsebody = elsebody; | |
| 1954 } | |
| 1955 | |
| 1956 Statement *ConditionalStatement::syntaxCopy() | |
| 1957 { | |
| 1958 Statement *e = NULL; | |
| 1959 if (elsebody) | |
| 1960 e = elsebody->syntaxCopy(); | |
| 1961 ConditionalStatement *s = new ConditionalStatement(loc, | |
| 1962 condition->syntaxCopy(), ifbody->syntaxCopy(), e); | |
| 1963 return s; | |
| 1964 } | |
| 1965 | |
| 1966 Statement *ConditionalStatement::semantic(Scope *sc) | |
| 1967 { | |
| 1968 //printf("ConditionalStatement::semantic()\n"); | |
| 1969 | |
| 1970 // If we can short-circuit evaluate the if statement, don't do the | |
| 1971 // semantic analysis of the skipped code. | |
| 1972 // This feature allows a limited form of conditional compilation. | |
| 1973 if (condition->include(sc, NULL)) | |
| 1974 { | |
| 1975 ifbody = ifbody->semantic(sc); | |
| 1976 return ifbody; | |
| 1977 } | |
| 1978 else | |
| 1979 { | |
| 1980 if (elsebody) | |
| 1981 elsebody = elsebody->semantic(sc); | |
| 1982 return elsebody; | |
| 1983 } | |
| 1984 } | |
| 1985 | |
| 1986 Statements *ConditionalStatement::flatten(Scope *sc) | |
| 1987 { | |
| 1988 Statement *s; | |
| 1989 | |
| 1990 if (condition->include(sc, NULL)) | |
| 1991 s = ifbody; | |
| 1992 else | |
| 1993 s = elsebody; | |
| 1994 | |
| 1995 Statements *a = new Statements(); | |
| 1996 a->push(s); | |
| 1997 return a; | |
| 1998 } | |
| 1999 | |
| 2000 int ConditionalStatement::usesEH() | |
| 2001 { | |
| 2002 return (ifbody && ifbody->usesEH()) || (elsebody && elsebody->usesEH()); | |
| 2003 } | |
| 2004 | |
| 2005 void ConditionalStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2006 { | |
| 2007 condition->toCBuffer(buf, hgs); | |
| 2008 buf->writenl(); | |
| 336 | 2009 buf->writeByte('{'); |
| 2010 buf->writenl(); | |
| 159 | 2011 if (ifbody) |
| 2012 ifbody->toCBuffer(buf, hgs); | |
| 336 | 2013 buf->writeByte('}'); |
| 2014 buf->writenl(); | |
| 159 | 2015 if (elsebody) |
| 2016 { | |
| 2017 buf->writestring("else"); | |
| 2018 buf->writenl(); | |
| 336 | 2019 buf->writeByte('{'); |
| 2020 buf->writenl(); | |
| 159 | 2021 elsebody->toCBuffer(buf, hgs); |
| 336 | 2022 buf->writeByte('}'); |
| 2023 buf->writenl(); | |
| 159 | 2024 } |
| 2025 buf->writenl(); | |
| 2026 } | |
| 2027 | |
| 2028 | |
| 2029 /******************************** PragmaStatement ***************************/ | |
| 2030 | |
| 2031 PragmaStatement::PragmaStatement(Loc loc, Identifier *ident, Expressions *args, Statement *body) | |
| 2032 : Statement(loc) | |
| 2033 { | |
| 2034 this->ident = ident; | |
| 2035 this->args = args; | |
| 2036 this->body = body; | |
| 2037 } | |
| 2038 | |
| 2039 Statement *PragmaStatement::syntaxCopy() | |
| 2040 { | |
| 2041 Statement *b = NULL; | |
| 2042 if (body) | |
| 2043 b = body->syntaxCopy(); | |
| 2044 PragmaStatement *s = new PragmaStatement(loc, | |
| 2045 ident, Expression::arraySyntaxCopy(args), b); | |
| 2046 return s; | |
| 2047 } | |
| 2048 | |
| 2049 Statement *PragmaStatement::semantic(Scope *sc) | |
| 2050 { // Should be merged with PragmaDeclaration | |
| 2051 //printf("PragmaStatement::semantic() %s\n", toChars()); | |
| 2052 //printf("body = %p\n", body); | |
| 2053 if (ident == Id::msg) | |
| 2054 { | |
| 2055 if (args) | |
| 2056 { | |
| 2057 for (size_t i = 0; i < args->dim; i++) | |
| 2058 { | |
| 2059 Expression *e = (Expression *)args->data[i]; | |
| 2060 | |
| 2061 e = e->semantic(sc); | |
| 2062 e = e->optimize(WANTvalue | WANTinterpret); | |
| 2063 if (e->op == TOKstring) | |
| 2064 { | |
| 2065 StringExp *se = (StringExp *)e; | |
| 2066 fprintf(stdmsg, "%.*s", (int)se->len, se->string); | |
| 2067 } | |
| 2068 else | |
| 2069 error("string expected for message, not '%s'", e->toChars()); | |
| 2070 } | |
| 2071 fprintf(stdmsg, "\n"); | |
| 2072 } | |
| 2073 } | |
| 2074 else if (ident == Id::lib) | |
| 2075 { | |
| 2076 if (!args || args->dim != 1) | |
| 2077 error("string expected for library name"); | |
| 2078 else | |
| 2079 { | |
| 2080 Expression *e = (Expression *)args->data[0]; | |
| 2081 | |
| 2082 e = e->semantic(sc); | |
| 2083 e = e->optimize(WANTvalue | WANTinterpret); | |
| 2084 args->data[0] = (void *)e; | |
| 2085 if (e->op != TOKstring) | |
| 2086 error("string expected for library name, not '%s'", e->toChars()); | |
| 2087 else if (global.params.verbose) | |
| 2088 { | |
| 2089 StringExp *se = (StringExp *)e; | |
| 2090 char *name = (char *)mem.malloc(se->len + 1); | |
| 2091 memcpy(name, se->string, se->len); | |
| 2092 name[se->len] = 0; | |
| 2093 printf("library %s\n", name); | |
| 2094 mem.free(name); | |
| 2095 } | |
| 2096 } | |
| 2097 } | |
| 2098 else | |
| 2099 error("unrecognized pragma(%s)", ident->toChars()); | |
| 2100 | |
| 2101 if (body) | |
| 2102 { | |
| 2103 body = body->semantic(sc); | |
| 2104 } | |
| 2105 return body; | |
| 2106 } | |
| 2107 | |
| 2108 int PragmaStatement::usesEH() | |
| 2109 { | |
| 2110 return body && body->usesEH(); | |
| 2111 } | |
| 2112 | |
| 336 | 2113 int PragmaStatement::blockExit() |
| 2114 { | |
| 2115 int result = BEfallthru; | |
| 2116 #if 0 // currently, no code is generated for Pragma's, so it's just fallthru | |
| 2117 if (arrayExpressionCanThrow(args)) | |
| 2118 result |= BEthrow; | |
| 2119 if (body) | |
| 2120 result |= body->blockExit(); | |
| 2121 #endif | |
| 2122 return result; | |
| 2123 } | |
| 2124 | |
| 159 | 2125 int PragmaStatement::fallOffEnd() |
| 2126 { | |
| 2127 if (body) | |
| 2128 return body->fallOffEnd(); | |
| 2129 return TRUE; | |
| 2130 } | |
| 2131 | |
| 2132 void PragmaStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2133 { | |
| 2134 buf->writestring("pragma ("); | |
| 2135 buf->writestring(ident->toChars()); | |
| 2136 if (args && args->dim) | |
| 2137 { | |
| 2138 buf->writestring(", "); | |
| 2139 argsToCBuffer(buf, args, hgs); | |
| 2140 } | |
| 2141 buf->writeByte(')'); | |
| 2142 if (body) | |
| 2143 { | |
| 2144 buf->writenl(); | |
| 2145 buf->writeByte('{'); | |
| 2146 buf->writenl(); | |
| 2147 | |
| 2148 body->toCBuffer(buf, hgs); | |
| 2149 | |
| 2150 buf->writeByte('}'); | |
| 2151 buf->writenl(); | |
| 2152 } | |
| 2153 else | |
| 2154 { | |
| 2155 buf->writeByte(';'); | |
| 2156 buf->writenl(); | |
| 2157 } | |
| 2158 } | |
| 2159 | |
| 2160 | |
| 2161 /******************************** StaticAssertStatement ***************************/ | |
| 2162 | |
| 2163 StaticAssertStatement::StaticAssertStatement(StaticAssert *sa) | |
| 2164 : Statement(sa->loc) | |
| 2165 { | |
| 2166 this->sa = sa; | |
| 2167 } | |
| 2168 | |
| 2169 Statement *StaticAssertStatement::syntaxCopy() | |
| 2170 { | |
| 2171 StaticAssertStatement *s = new StaticAssertStatement((StaticAssert *)sa->syntaxCopy(NULL)); | |
| 2172 return s; | |
| 2173 } | |
| 2174 | |
| 2175 Statement *StaticAssertStatement::semantic(Scope *sc) | |
| 2176 { | |
| 2177 sa->semantic2(sc); | |
| 2178 return NULL; | |
| 2179 } | |
| 2180 | |
| 2181 void StaticAssertStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2182 { | |
| 2183 sa->toCBuffer(buf, hgs); | |
| 2184 } | |
| 2185 | |
| 2186 | |
| 2187 /******************************** SwitchStatement ***************************/ | |
| 2188 | |
| 2189 SwitchStatement::SwitchStatement(Loc loc, Expression *c, Statement *b) | |
| 2190 : Statement(loc) | |
| 2191 { | |
| 2192 condition = c; | |
| 2193 body = b; | |
| 2194 sdefault = NULL; | |
| 2195 cases = NULL; | |
| 2196 hasNoDefault = 0; | |
| 2197 // LLVMDC | |
| 309 | 2198 enclosinghandler = NULL; |
| 159 | 2199 } |
| 2200 | |
| 2201 Statement *SwitchStatement::syntaxCopy() | |
| 2202 { | |
| 2203 SwitchStatement *s = new SwitchStatement(loc, | |
| 2204 condition->syntaxCopy(), body->syntaxCopy()); | |
| 2205 return s; | |
| 2206 } | |
| 2207 | |
| 2208 Statement *SwitchStatement::semantic(Scope *sc) | |
| 2209 { | |
| 2210 //printf("SwitchStatement::semantic(%p)\n", this); | |
| 2211 assert(!cases); // ensure semantic() is only run once | |
| 2212 | |
| 309 | 2213 enclosinghandler = sc->tfOfTry; |
| 159 | 2214 |
| 2215 condition = condition->semantic(sc); | |
| 2216 condition = resolveProperties(sc, condition); | |
| 2217 if (condition->type->isString()) | |
| 2218 { | |
| 2219 // If it's not an array, cast it to one | |
| 2220 if (condition->type->ty != Tarray) | |
| 2221 { | |
| 2222 condition = condition->implicitCastTo(sc, condition->type->nextOf()->arrayOf()); | |
| 2223 } | |
| 2224 } | |
| 2225 else | |
| 2226 { condition = condition->integralPromotions(sc); | |
| 2227 condition->checkIntegral(); | |
| 2228 } | |
| 2229 condition = condition->optimize(WANTvalue); | |
| 2230 | |
| 2231 sc = sc->push(); | |
| 2232 sc->sbreak = this; | |
| 2233 sc->sw = this; | |
| 2234 | |
| 2235 cases = new Array(); | |
| 2236 sc->noctor++; // BUG: should use Scope::mergeCallSuper() for each case instead | |
| 2237 body = body->semantic(sc); | |
| 2238 sc->noctor--; | |
| 2239 | |
| 2240 // Resolve any goto case's with exp | |
| 2241 for (int i = 0; i < gotoCases.dim; i++) | |
| 2242 { | |
| 2243 GotoCaseStatement *gcs = (GotoCaseStatement *)gotoCases.data[i]; | |
| 2244 | |
| 2245 if (!gcs->exp) | |
| 2246 { | |
| 2247 gcs->error("no case statement following goto case;"); | |
| 2248 break; | |
| 2249 } | |
| 2250 | |
| 2251 for (Scope *scx = sc; scx; scx = scx->enclosing) | |
| 2252 { | |
| 2253 if (!scx->sw) | |
| 2254 continue; | |
| 2255 for (int j = 0; j < scx->sw->cases->dim; j++) | |
| 2256 { | |
| 2257 CaseStatement *cs = (CaseStatement *)scx->sw->cases->data[j]; | |
| 2258 | |
| 2259 if (cs->exp->equals(gcs->exp)) | |
| 2260 { | |
| 2261 gcs->cs = cs; | |
| 2262 goto Lfoundcase; | |
| 2263 } | |
| 2264 } | |
| 2265 } | |
| 2266 gcs->error("case %s not found", gcs->exp->toChars()); | |
| 2267 | |
| 2268 Lfoundcase: | |
| 2269 ; | |
| 2270 } | |
| 2271 | |
| 2272 if (!sc->sw->sdefault) | |
| 2273 { hasNoDefault = 1; | |
| 2274 | |
| 2275 if (global.params.warnings) | |
|
215
a58d8f4b84df
[svn r231] Changed: warnings are no longer treated as an error.
lindquist
parents:
159
diff
changeset
|
2276 { warning("%s: switch statement has no default", loc.toChars()); |
| 159 | 2277 } |
| 2278 | |
| 2279 // Generate runtime error if the default is hit | |
| 2280 Statements *a = new Statements(); | |
| 2281 CompoundStatement *cs; | |
| 2282 Statement *s; | |
| 2283 | |
| 2284 if (global.params.useSwitchError) | |
| 2285 s = new SwitchErrorStatement(loc); | |
| 2286 else | |
| 2287 { Expression *e = new HaltExp(loc); | |
| 2288 s = new ExpStatement(loc, e); | |
| 2289 } | |
| 2290 | |
| 2291 a->reserve(4); | |
| 2292 a->push(body); | |
| 2293 a->push(new BreakStatement(loc, NULL)); | |
| 2294 sc->sw->sdefault = new DefaultStatement(loc, s); | |
| 2295 a->push(sc->sw->sdefault); | |
| 2296 cs = new CompoundStatement(loc, a); | |
| 2297 body = cs; | |
| 2298 } | |
| 2299 | |
| 2300 sc->pop(); | |
| 2301 return this; | |
| 2302 } | |
| 2303 | |
| 2304 int SwitchStatement::hasBreak() | |
| 2305 { | |
| 2306 return TRUE; | |
| 2307 } | |
| 2308 | |
| 2309 int SwitchStatement::usesEH() | |
| 2310 { | |
| 2311 return body ? body->usesEH() : 0; | |
| 2312 } | |
| 2313 | |
| 336 | 2314 int SwitchStatement::blockExit() |
| 2315 { int result = BEnone; | |
| 2316 if (condition->canThrow()) | |
| 2317 result |= BEthrow; | |
| 2318 | |
| 2319 if (body) | |
| 2320 { result |= body->blockExit(); | |
| 2321 if (result & BEbreak) | |
| 2322 { result |= BEfallthru; | |
| 2323 result &= ~BEbreak; | |
| 2324 } | |
| 2325 } | |
| 2326 else | |
| 2327 result |= BEfallthru; | |
| 2328 | |
| 2329 return result; | |
| 2330 } | |
| 2331 | |
| 159 | 2332 int SwitchStatement::fallOffEnd() |
| 2333 { | |
| 2334 if (body) | |
| 2335 body->fallOffEnd(); | |
| 2336 return TRUE; // need to do this better | |
| 2337 } | |
| 2338 | |
| 2339 void SwitchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2340 { | |
| 2341 buf->writestring("switch ("); | |
| 2342 condition->toCBuffer(buf, hgs); | |
| 2343 buf->writebyte(')'); | |
| 2344 buf->writenl(); | |
| 2345 if (body) | |
| 2346 { | |
| 2347 if (!body->isScopeStatement()) | |
| 2348 { buf->writebyte('{'); | |
| 2349 buf->writenl(); | |
| 2350 body->toCBuffer(buf, hgs); | |
| 2351 buf->writebyte('}'); | |
| 2352 buf->writenl(); | |
| 2353 } | |
| 2354 else | |
| 2355 { | |
| 2356 body->toCBuffer(buf, hgs); | |
| 2357 } | |
| 2358 } | |
| 2359 } | |
| 2360 | |
| 2361 /******************************** CaseStatement ***************************/ | |
| 2362 | |
| 2363 CaseStatement::CaseStatement(Loc loc, Expression *exp, Statement *s) | |
| 2364 : Statement(loc) | |
| 2365 { | |
| 2366 this->exp = exp; | |
| 2367 this->statement = s; | |
| 2368 cblock = NULL; | |
| 2369 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
|
2370 llvmIdx = NULL; |
| 159 | 2371 } |
| 2372 | |
| 2373 Statement *CaseStatement::syntaxCopy() | |
| 2374 { | |
| 2375 CaseStatement *s = new CaseStatement(loc, exp->syntaxCopy(), statement->syntaxCopy()); | |
| 2376 return s; | |
| 2377 } | |
| 2378 | |
| 2379 Statement *CaseStatement::semantic(Scope *sc) | |
| 2380 { SwitchStatement *sw = sc->sw; | |
| 2381 | |
| 2382 //printf("CaseStatement::semantic() %s\n", toChars()); | |
| 2383 exp = exp->semantic(sc); | |
| 2384 if (sw) | |
| 2385 { int i; | |
| 2386 | |
| 2387 exp = exp->implicitCastTo(sc, sw->condition->type); | |
| 2388 exp = exp->optimize(WANTvalue | WANTinterpret); | |
| 2389 if (exp->op != TOKstring && exp->op != TOKint64) | |
| 2390 { | |
| 2391 error("case must be a string or an integral constant, not %s", exp->toChars()); | |
| 2392 exp = new IntegerExp(0); | |
| 2393 } | |
| 2394 | |
| 2395 for (i = 0; i < sw->cases->dim; i++) | |
| 2396 { | |
| 2397 CaseStatement *cs = (CaseStatement *)sw->cases->data[i]; | |
| 2398 | |
| 2399 //printf("comparing '%s' with '%s'\n", exp->toChars(), cs->exp->toChars()); | |
| 2400 if (cs->exp->equals(exp)) | |
| 2401 { error("duplicate case %s in switch statement", exp->toChars()); | |
| 2402 break; | |
| 2403 } | |
| 2404 } | |
| 2405 | |
| 2406 sw->cases->push(this); | |
| 2407 | |
| 2408 // Resolve any goto case's with no exp to this case statement | |
| 2409 for (i = 0; i < sw->gotoCases.dim; i++) | |
| 2410 { | |
| 2411 GotoCaseStatement *gcs = (GotoCaseStatement *)sw->gotoCases.data[i]; | |
| 2412 | |
| 2413 if (!gcs->exp) | |
| 2414 { | |
| 2415 gcs->cs = this; | |
| 2416 sw->gotoCases.remove(i); // remove from array | |
| 2417 } | |
| 2418 } | |
| 2419 } | |
| 2420 else | |
| 2421 error("case not in switch statement"); | |
| 2422 statement = statement->semantic(sc); | |
| 2423 return this; | |
| 2424 } | |
| 2425 | |
| 2426 int CaseStatement::compare(Object *obj) | |
| 2427 { | |
| 2428 // Sort cases so we can do an efficient lookup | |
| 2429 CaseStatement *cs2 = (CaseStatement *)(obj); | |
| 2430 | |
| 2431 return exp->compare(cs2->exp); | |
| 2432 } | |
| 2433 | |
| 2434 int CaseStatement::usesEH() | |
| 2435 { | |
| 2436 return statement->usesEH(); | |
| 2437 } | |
| 2438 | |
| 336 | 2439 int CaseStatement::blockExit() |
| 2440 { | |
| 2441 return statement->blockExit(); | |
| 2442 } | |
| 2443 | |
| 159 | 2444 int CaseStatement::fallOffEnd() |
| 2445 { | |
| 2446 return statement->fallOffEnd(); | |
| 2447 } | |
| 2448 | |
| 2449 int CaseStatement::comeFrom() | |
| 2450 { | |
| 2451 return TRUE; | |
| 2452 } | |
| 2453 | |
| 2454 void CaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2455 { | |
| 2456 buf->writestring("case "); | |
| 2457 exp->toCBuffer(buf, hgs); | |
| 2458 buf->writebyte(':'); | |
| 2459 buf->writenl(); | |
| 2460 statement->toCBuffer(buf, hgs); | |
| 2461 } | |
| 2462 | |
| 2463 /******************************** DefaultStatement ***************************/ | |
| 2464 | |
| 2465 DefaultStatement::DefaultStatement(Loc loc, Statement *s) | |
| 2466 : Statement(loc) | |
| 2467 { | |
| 2468 this->statement = s; | |
| 2469 #if IN_GCC | |
| 2470 + cblock = NULL; | |
| 2471 #endif | |
| 2472 bodyBB = NULL; | |
| 2473 } | |
| 2474 | |
| 2475 Statement *DefaultStatement::syntaxCopy() | |
| 2476 { | |
| 2477 DefaultStatement *s = new DefaultStatement(loc, statement->syntaxCopy()); | |
| 2478 return s; | |
| 2479 } | |
| 2480 | |
| 2481 Statement *DefaultStatement::semantic(Scope *sc) | |
| 2482 { | |
| 336 | 2483 //printf("DefaultStatement::semantic()\n"); |
| 159 | 2484 if (sc->sw) |
| 2485 { | |
| 2486 if (sc->sw->sdefault) | |
| 2487 { | |
| 2488 error("switch statement already has a default"); | |
| 2489 } | |
| 2490 sc->sw->sdefault = this; | |
| 2491 } | |
| 2492 else | |
| 2493 error("default not in switch statement"); | |
| 2494 statement = statement->semantic(sc); | |
| 2495 return this; | |
| 2496 } | |
| 2497 | |
| 2498 int DefaultStatement::usesEH() | |
| 2499 { | |
| 2500 return statement->usesEH(); | |
| 2501 } | |
| 2502 | |
| 336 | 2503 int DefaultStatement::blockExit() |
| 2504 { | |
| 2505 return statement->blockExit(); | |
| 2506 } | |
| 2507 | |
| 159 | 2508 int DefaultStatement::fallOffEnd() |
| 2509 { | |
| 2510 return statement->fallOffEnd(); | |
| 2511 } | |
| 2512 | |
| 2513 int DefaultStatement::comeFrom() | |
| 2514 { | |
| 2515 return TRUE; | |
| 2516 } | |
| 2517 | |
| 2518 void DefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2519 { | |
| 2520 buf->writestring("default:\n"); | |
| 2521 statement->toCBuffer(buf, hgs); | |
| 2522 } | |
| 2523 | |
| 2524 /******************************** GotoDefaultStatement ***************************/ | |
| 2525 | |
| 2526 GotoDefaultStatement::GotoDefaultStatement(Loc loc) | |
| 2527 : Statement(loc) | |
| 2528 { | |
| 2529 sw = NULL; | |
| 309 | 2530 enclosinghandler = NULL; |
| 159 | 2531 } |
| 2532 | |
| 2533 Statement *GotoDefaultStatement::syntaxCopy() | |
| 2534 { | |
| 2535 GotoDefaultStatement *s = new GotoDefaultStatement(loc); | |
| 2536 return s; | |
| 2537 } | |
| 2538 | |
| 2539 Statement *GotoDefaultStatement::semantic(Scope *sc) | |
| 2540 { | |
| 309 | 2541 enclosinghandler = sc->tfOfTry; |
| 159 | 2542 sw = sc->sw; |
| 2543 if (!sw) | |
| 2544 error("goto default not in switch statement"); | |
| 2545 return this; | |
| 2546 } | |
| 2547 | |
| 336 | 2548 int GotoDefaultStatement::blockExit() |
| 2549 { | |
| 2550 return BEgoto; | |
| 2551 } | |
| 2552 | |
| 159 | 2553 int GotoDefaultStatement::fallOffEnd() |
| 2554 { | |
| 2555 return FALSE; | |
| 2556 } | |
| 2557 | |
| 2558 void GotoDefaultStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2559 { | |
| 2560 buf->writestring("goto default;\n"); | |
| 2561 } | |
| 2562 | |
| 2563 /******************************** GotoCaseStatement ***************************/ | |
| 2564 | |
| 2565 GotoCaseStatement::GotoCaseStatement(Loc loc, Expression *exp) | |
| 2566 : Statement(loc) | |
| 2567 { | |
| 2568 cs = NULL; | |
| 2569 this->exp = exp; | |
| 309 | 2570 enclosinghandler = NULL; |
| 159 | 2571 sw = NULL; |
| 2572 } | |
| 2573 | |
| 2574 Statement *GotoCaseStatement::syntaxCopy() | |
| 2575 { | |
| 2576 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 2577 GotoCaseStatement *s = new GotoCaseStatement(loc, e); | |
| 2578 return s; | |
| 2579 } | |
| 2580 | |
| 2581 Statement *GotoCaseStatement::semantic(Scope *sc) | |
| 2582 { | |
| 309 | 2583 enclosinghandler = sc->tfOfTry; |
| 159 | 2584 if (exp) |
| 2585 exp = exp->semantic(sc); | |
| 2586 | |
| 2587 if (!sc->sw) | |
| 2588 error("goto case not in switch statement"); | |
| 2589 else | |
| 2590 { | |
| 2591 sw = sc->sw; | |
| 2592 sc->sw->gotoCases.push(this); | |
| 2593 if (exp) | |
| 2594 { | |
| 2595 exp = exp->implicitCastTo(sc, sc->sw->condition->type); | |
| 2596 exp = exp->optimize(WANTvalue); | |
| 2597 } | |
| 2598 } | |
| 2599 return this; | |
| 2600 } | |
| 2601 | |
| 336 | 2602 int GotoCaseStatement::blockExit() |
| 2603 { | |
| 2604 return BEgoto; | |
| 2605 } | |
| 2606 | |
| 159 | 2607 int GotoCaseStatement::fallOffEnd() |
| 2608 { | |
| 2609 return FALSE; | |
| 2610 } | |
| 2611 | |
| 2612 void GotoCaseStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2613 { | |
| 2614 buf->writestring("goto case"); | |
| 2615 if (exp) | |
| 2616 { buf->writebyte(' '); | |
| 2617 exp->toCBuffer(buf, hgs); | |
| 2618 } | |
| 2619 buf->writebyte(';'); | |
| 2620 buf->writenl(); | |
| 2621 } | |
| 2622 | |
| 2623 /******************************** SwitchErrorStatement ***************************/ | |
| 2624 | |
| 2625 SwitchErrorStatement::SwitchErrorStatement(Loc loc) | |
| 2626 : Statement(loc) | |
| 2627 { | |
| 2628 } | |
| 2629 | |
| 336 | 2630 int SwitchErrorStatement::blockExit() |
| 2631 { | |
| 2632 return BEthrow; | |
| 2633 } | |
| 2634 | |
| 159 | 2635 int SwitchErrorStatement::fallOffEnd() |
| 2636 { | |
| 2637 return FALSE; | |
| 2638 } | |
| 2639 | |
| 2640 void SwitchErrorStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2641 { | |
| 2642 buf->writestring("SwitchErrorStatement::toCBuffer()"); | |
| 2643 buf->writenl(); | |
| 2644 } | |
| 2645 | |
| 2646 /******************************** ReturnStatement ***************************/ | |
| 2647 | |
| 2648 ReturnStatement::ReturnStatement(Loc loc, Expression *exp) | |
| 2649 : Statement(loc) | |
| 2650 { | |
| 2651 this->exp = exp; | |
| 309 | 2652 this->enclosinghandler = NULL; |
| 159 | 2653 } |
| 2654 | |
| 2655 Statement *ReturnStatement::syntaxCopy() | |
| 2656 { | |
| 2657 Expression *e = NULL; | |
| 2658 if (exp) | |
| 2659 e = exp->syntaxCopy(); | |
| 2660 ReturnStatement *s = new ReturnStatement(loc, e); | |
| 2661 return s; | |
| 2662 } | |
| 2663 | |
| 2664 Statement *ReturnStatement::semantic(Scope *sc) | |
| 2665 { | |
| 2666 //printf("ReturnStatement::semantic() %s\n", toChars()); | |
| 309 | 2667 this->enclosinghandler = sc->tfOfTry; |
| 159 | 2668 |
| 2669 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 2670 Scope *scx = sc; | |
| 2671 int implicit0 = 0; | |
| 2672 | |
| 2673 if (sc->fes) | |
| 2674 { | |
| 2675 // Find scope of function foreach is in | |
| 2676 for (; 1; scx = scx->enclosing) | |
| 2677 { | |
| 2678 assert(scx); | |
| 2679 if (scx->func != fd) | |
| 2680 { fd = scx->func; // fd is now function enclosing foreach | |
| 2681 break; | |
| 2682 } | |
| 2683 } | |
| 2684 } | |
| 2685 | |
| 2686 Type *tret = fd->type->nextOf(); | |
| 2687 if (fd->tintro) | |
| 336 | 2688 /* We'll be implicitly casting the return expression to tintro |
| 2689 */ | |
| 159 | 2690 tret = fd->tintro->nextOf(); |
| 2691 Type *tbret = NULL; | |
| 2692 | |
| 2693 if (tret) | |
| 2694 tbret = tret->toBasetype(); | |
| 2695 | |
| 2696 // main() returns 0, even if it returns void | |
| 2697 if (!exp && (!tbret || tbret->ty == Tvoid) && fd->isMain()) | |
| 2698 { implicit0 = 1; | |
| 2699 exp = new IntegerExp(0); | |
| 2700 } | |
| 2701 | |
| 2702 if (sc->incontract || scx->incontract) | |
| 2703 error("return statements cannot be in contracts"); | |
| 2704 if (sc->tf || scx->tf) | |
| 2705 error("return statements cannot be in finally, scope(exit) or scope(success) bodies"); | |
| 2706 | |
| 2707 if (fd->isCtorDeclaration()) | |
| 2708 { | |
| 2709 // Constructors implicitly do: | |
| 2710 // return this; | |
| 2711 if (exp && exp->op != TOKthis) | |
| 2712 error("cannot return expression from constructor"); | |
| 2713 exp = new ThisExp(0); | |
| 2714 } | |
| 2715 | |
| 2716 if (!exp) | |
| 2717 fd->nrvo_can = 0; | |
| 2718 | |
| 2719 if (exp) | |
| 2720 { | |
| 2721 fd->hasReturnExp |= 1; | |
| 2722 | |
| 2723 exp = exp->semantic(sc); | |
| 2724 exp = resolveProperties(sc, exp); | |
| 2725 exp = exp->optimize(WANTvalue); | |
| 2726 | |
| 2727 if (fd->nrvo_can && exp->op == TOKvar) | |
| 2728 { VarExp *ve = (VarExp *)exp; | |
| 2729 VarDeclaration *v = ve->var->isVarDeclaration(); | |
| 2730 | |
| 2731 if (!v || v->isOut() || v->isRef()) | |
| 2732 fd->nrvo_can = 0; | |
| 2733 else if (fd->nrvo_var == NULL) | |
| 2734 { if (!v->isDataseg() && !v->isParameter() && v->toParent2() == fd) | |
| 2735 fd->nrvo_var = v; | |
| 2736 else | |
| 2737 fd->nrvo_can = 0; | |
| 2738 } | |
| 2739 else if (fd->nrvo_var != v) | |
| 2740 fd->nrvo_can = 0; | |
| 2741 } | |
| 2742 else | |
| 2743 fd->nrvo_can = 0; | |
| 2744 | |
| 2745 if (fd->returnLabel && tbret->ty != Tvoid) | |
| 2746 { | |
| 2747 } | |
| 2748 else if (fd->inferRetType) | |
| 2749 { | |
| 2750 if (fd->type->nextOf()) | |
| 2751 { | |
| 2752 if (!exp->type->equals(fd->type->nextOf())) | |
| 2753 error("mismatched function return type inference of %s and %s", | |
| 2754 exp->type->toChars(), fd->type->nextOf()->toChars()); | |
| 2755 } | |
| 2756 else | |
| 2757 { | |
| 2758 fd->type->next = exp->type; | |
| 2759 fd->type = fd->type->semantic(loc, sc); | |
| 2760 if (!fd->tintro) | |
| 2761 { tret = fd->type->nextOf(); | |
| 2762 tbret = tret->toBasetype(); | |
| 2763 } | |
| 2764 } | |
| 2765 } | |
| 2766 else if (tbret->ty != Tvoid) | |
| 2767 { | |
| 2768 exp = exp->implicitCastTo(sc, tret); | |
| 2769 } | |
| 2770 } | |
| 2771 else if (fd->inferRetType) | |
| 2772 { | |
| 2773 if (fd->type->nextOf()) | |
| 2774 { | |
| 2775 if (fd->type->nextOf()->ty != Tvoid) | |
| 2776 error("mismatched function return type inference of void and %s", | |
| 2777 fd->type->nextOf()->toChars()); | |
| 2778 } | |
| 2779 else | |
| 2780 { | |
| 2781 fd->type->next = Type::tvoid; | |
| 2782 fd->type = fd->type->semantic(loc, sc); | |
| 2783 if (!fd->tintro) | |
| 2784 { tret = Type::tvoid; | |
| 2785 tbret = tret; | |
| 2786 } | |
| 2787 } | |
| 2788 } | |
| 2789 else if (tbret->ty != Tvoid) // if non-void return | |
| 2790 error("return expression expected"); | |
| 2791 | |
| 2792 if (sc->fes) | |
| 2793 { | |
| 2794 Statement *s; | |
| 2795 | |
| 2796 if (exp && !implicit0) | |
| 2797 { | |
| 2798 exp = exp->implicitCastTo(sc, tret); | |
| 2799 } | |
| 2800 if (!exp || exp->op == TOKint64 || exp->op == TOKfloat64 || | |
| 2801 exp->op == TOKimaginary80 || exp->op == TOKcomplex80 || | |
| 2802 exp->op == TOKthis || exp->op == TOKsuper || exp->op == TOKnull || | |
| 2803 exp->op == TOKstring) | |
| 2804 { | |
| 2805 sc->fes->cases.push(this); | |
| 2806 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2807 } | |
| 2808 else if (fd->type->nextOf()->toBasetype() == Type::tvoid) | |
| 2809 { | |
| 2810 Statement *s1; | |
| 2811 Statement *s2; | |
| 2812 | |
| 2813 s = new ReturnStatement(0, NULL); | |
| 2814 sc->fes->cases.push(s); | |
| 2815 | |
| 2816 // Construct: { exp; return cases.dim + 1; } | |
| 2817 s1 = new ExpStatement(loc, exp); | |
| 2818 s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2819 s = new CompoundStatement(loc, s1, s2); | |
| 2820 } | |
| 2821 else | |
| 2822 { | |
| 2823 VarExp *v; | |
| 2824 Statement *s1; | |
| 2825 Statement *s2; | |
| 2826 | |
| 2827 // Construct: return vresult; | |
| 2828 if (!fd->vresult) | |
| 2829 { VarDeclaration *v; | |
| 2830 | |
| 2831 v = new VarDeclaration(loc, tret, Id::result, NULL); | |
| 2832 v->noauto = 1; | |
| 2833 v->semantic(scx); | |
| 2834 if (!scx->insert(v)) | |
| 2835 assert(0); | |
| 2836 v->parent = fd; | |
| 2837 fd->vresult = v; | |
| 2838 } | |
| 2839 | |
| 2840 v = new VarExp(0, fd->vresult); | |
| 2841 s = new ReturnStatement(0, v); | |
| 2842 sc->fes->cases.push(s); | |
| 2843 | |
| 2844 // Construct: { vresult = exp; return cases.dim + 1; } | |
| 2845 v = new VarExp(0, fd->vresult); | |
| 2846 exp = new AssignExp(loc, v, exp); | |
| 2847 exp = exp->semantic(sc); | |
| 2848 s1 = new ExpStatement(loc, exp); | |
| 2849 s2 = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2850 s = new CompoundStatement(loc, s1, s2); | |
| 2851 } | |
| 2852 return s; | |
| 2853 } | |
| 2854 | |
| 2855 if (exp) | |
| 2856 { | |
| 2857 if (fd->returnLabel && tbret->ty != Tvoid) | |
| 2858 { | |
| 2859 assert(fd->vresult); | |
| 2860 VarExp *v = new VarExp(0, fd->vresult); | |
| 2861 | |
| 2862 exp = new AssignExp(loc, v, exp); | |
| 2863 exp = exp->semantic(sc); | |
| 2864 } | |
| 2865 //exp->dump(0); | |
| 2866 //exp->print(); | |
| 2867 exp->checkEscape(); | |
| 2868 } | |
| 2869 | |
| 2870 /* BUG: need to issue an error on: | |
| 2871 * this | |
| 2872 * { if (x) return; | |
| 2873 * super(); | |
| 2874 * } | |
| 2875 */ | |
| 2876 | |
| 2877 if (sc->callSuper & CSXany_ctor && | |
| 2878 !(sc->callSuper & (CSXthis_ctor | CSXsuper_ctor))) | |
| 2879 error("return without calling constructor"); | |
| 2880 | |
| 2881 sc->callSuper |= CSXreturn; | |
| 2882 | |
| 2883 // See if all returns are instead to be replaced with a goto returnLabel; | |
| 2884 if (fd->returnLabel) | |
| 2885 { | |
| 2886 GotoStatement *gs = new GotoStatement(loc, Id::returnLabel); | |
| 2887 | |
| 2888 gs->label = fd->returnLabel; | |
| 2889 if (exp) | |
| 2890 { Statement *s; | |
| 2891 | |
| 2892 s = new ExpStatement(0, exp); | |
| 2893 return new CompoundStatement(loc, s, gs); | |
| 2894 } | |
| 2895 return gs; | |
| 2896 } | |
| 2897 | |
| 2898 if (exp && tbret->ty == Tvoid && !fd->isMain()) | |
| 336 | 2899 { |
| 2900 /* Replace: | |
| 2901 * return exp; | |
| 2902 * with: | |
| 2903 * exp; return; | |
| 2904 */ | |
| 2905 Statement *s = new ExpStatement(loc, exp); | |
| 159 | 2906 loc = 0; |
| 2907 exp = NULL; | |
| 2908 return new CompoundStatement(loc, s, this); | |
| 2909 } | |
| 2910 | |
| 2911 return this; | |
| 2912 } | |
| 2913 | |
| 336 | 2914 int ReturnStatement::blockExit() |
| 2915 { int result = BEreturn; | |
| 2916 | |
| 2917 if (exp && exp->canThrow()) | |
| 2918 result |= BEthrow; | |
| 2919 return result; | |
| 2920 } | |
| 2921 | |
| 159 | 2922 int ReturnStatement::fallOffEnd() |
| 2923 { | |
| 2924 return FALSE; | |
| 2925 } | |
| 2926 | |
| 2927 void ReturnStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 2928 { | |
| 2929 buf->printf("return "); | |
| 2930 if (exp) | |
| 2931 exp->toCBuffer(buf, hgs); | |
| 2932 buf->writeByte(';'); | |
| 2933 buf->writenl(); | |
| 2934 } | |
| 2935 | |
| 2936 /******************************** BreakStatement ***************************/ | |
| 2937 | |
| 2938 BreakStatement::BreakStatement(Loc loc, Identifier *ident) | |
| 2939 : Statement(loc) | |
| 2940 { | |
| 2941 this->ident = ident; | |
| 309 | 2942 this->enclosinghandler = NULL; |
| 159 | 2943 } |
| 2944 | |
| 2945 Statement *BreakStatement::syntaxCopy() | |
| 2946 { | |
| 2947 BreakStatement *s = new BreakStatement(loc, ident); | |
| 2948 return s; | |
| 2949 } | |
| 2950 | |
| 2951 Statement *BreakStatement::semantic(Scope *sc) | |
| 2952 { | |
| 336 | 2953 //printf("BreakStatement::semantic()\n"); |
| 309 | 2954 enclosinghandler = sc->tfOfTry; |
| 159 | 2955 // If: |
| 2956 // break Identifier; | |
| 2957 if (ident) | |
| 2958 { | |
| 2959 Scope *scx; | |
| 2960 FuncDeclaration *thisfunc = sc->func; | |
| 2961 | |
| 2962 for (scx = sc; scx; scx = scx->enclosing) | |
| 2963 { | |
| 2964 LabelStatement *ls; | |
| 2965 | |
| 2966 if (scx->func != thisfunc) // if in enclosing function | |
| 2967 { | |
| 2968 if (sc->fes) // if this is the body of a foreach | |
| 2969 { | |
| 2970 /* Post this statement to the fes, and replace | |
| 2971 * it with a return value that caller will put into | |
| 2972 * a switch. Caller will figure out where the break | |
| 2973 * label actually is. | |
| 2974 * Case numbers start with 2, not 0, as 0 is continue | |
| 2975 * and 1 is break. | |
| 2976 */ | |
| 2977 Statement *s; | |
| 2978 sc->fes->cases.push(this); | |
| 2979 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 2980 return s; | |
| 2981 } | |
| 2982 break; // can't break to it | |
| 2983 } | |
| 2984 | |
| 2985 ls = scx->slabel; | |
| 2986 if (ls && ls->ident == ident) | |
| 2987 { | |
| 2988 Statement *s = ls->statement; | |
| 2989 | |
| 2990 if (!s->hasBreak()) | |
| 2991 error("label '%s' has no break", ident->toChars()); | |
| 2992 if (ls->tf != sc->tf) | |
| 2993 error("cannot break out of finally block"); | |
| 2994 | |
| 2995 this->target = ls; | |
| 2996 return this; | |
| 2997 } | |
| 2998 } | |
| 2999 error("enclosing label '%s' for break not found", ident->toChars()); | |
| 3000 } | |
| 3001 else if (!sc->sbreak) | |
| 3002 { | |
| 3003 if (sc->fes) | |
| 3004 { Statement *s; | |
| 3005 | |
| 3006 // Replace break; with return 1; | |
| 3007 s = new ReturnStatement(0, new IntegerExp(1)); | |
| 3008 return s; | |
| 3009 } | |
| 3010 error("break is not inside a loop or switch"); | |
| 3011 } | |
| 3012 return this; | |
| 3013 } | |
| 3014 | |
| 336 | 3015 int BreakStatement::blockExit() |
| 3016 { | |
| 3017 //printf("BreakStatement::blockExit(%p) = x%x\n", this, ident ? BEgoto : BEbreak); | |
| 3018 return ident ? BEgoto : BEbreak; | |
| 3019 } | |
| 3020 | |
| 159 | 3021 int BreakStatement::fallOffEnd() |
| 3022 { | |
| 3023 return FALSE; | |
| 3024 } | |
| 3025 | |
| 3026 void BreakStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3027 { | |
| 3028 buf->writestring("break"); | |
| 3029 if (ident) | |
| 3030 { buf->writebyte(' '); | |
| 3031 buf->writestring(ident->toChars()); | |
| 3032 } | |
| 3033 buf->writebyte(';'); | |
| 3034 buf->writenl(); | |
| 3035 } | |
| 3036 | |
| 3037 /******************************** ContinueStatement ***************************/ | |
| 3038 | |
| 3039 ContinueStatement::ContinueStatement(Loc loc, Identifier *ident) | |
| 3040 : Statement(loc) | |
| 3041 { | |
| 3042 this->ident = ident; | |
| 309 | 3043 this->enclosinghandler = NULL; |
| 159 | 3044 } |
| 3045 | |
| 3046 Statement *ContinueStatement::syntaxCopy() | |
| 3047 { | |
| 3048 ContinueStatement *s = new ContinueStatement(loc, ident); | |
| 3049 return s; | |
| 3050 } | |
| 3051 | |
| 3052 Statement *ContinueStatement::semantic(Scope *sc) | |
| 3053 { | |
| 309 | 3054 enclosinghandler = sc->tfOfTry; |
| 159 | 3055 //printf("ContinueStatement::semantic() %p\n", this); |
| 3056 if (ident) | |
| 3057 { | |
| 3058 Scope *scx; | |
| 3059 FuncDeclaration *thisfunc = sc->func; | |
| 3060 | |
| 3061 for (scx = sc; scx; scx = scx->enclosing) | |
| 3062 { | |
| 3063 LabelStatement *ls; | |
| 3064 | |
| 3065 if (scx->func != thisfunc) // if in enclosing function | |
| 3066 { | |
| 3067 if (sc->fes) // if this is the body of a foreach | |
| 3068 { | |
| 3069 for (; scx; scx = scx->enclosing) | |
| 3070 { | |
| 3071 ls = scx->slabel; | |
| 3072 if (ls && ls->ident == ident && ls->statement == sc->fes) | |
| 3073 { | |
| 3074 // Replace continue ident; with return 0; | |
| 3075 return new ReturnStatement(0, new IntegerExp(0)); | |
| 3076 } | |
| 3077 } | |
| 3078 | |
| 3079 /* Post this statement to the fes, and replace | |
| 3080 * it with a return value that caller will put into | |
| 3081 * a switch. Caller will figure out where the break | |
| 3082 * label actually is. | |
| 3083 * Case numbers start with 2, not 0, as 0 is continue | |
| 3084 * and 1 is break. | |
| 3085 */ | |
| 3086 Statement *s; | |
| 3087 sc->fes->cases.push(this); | |
| 3088 s = new ReturnStatement(0, new IntegerExp(sc->fes->cases.dim + 1)); | |
| 3089 return s; | |
| 3090 } | |
| 3091 break; // can't continue to it | |
| 3092 } | |
| 3093 | |
| 3094 ls = scx->slabel; | |
| 3095 if (ls && ls->ident == ident) | |
| 3096 { | |
| 3097 Statement *s = ls->statement; | |
| 3098 | |
| 3099 if (!s->hasContinue()) | |
| 3100 error("label '%s' has no continue", ident->toChars()); | |
| 3101 if (ls->tf != sc->tf) | |
| 3102 error("cannot continue out of finally block"); | |
| 3103 | |
| 3104 this->target = ls; | |
| 3105 return this; | |
| 3106 } | |
| 3107 } | |
| 3108 error("enclosing label '%s' for continue not found", ident->toChars()); | |
| 3109 } | |
| 3110 else if (!sc->scontinue) | |
| 3111 { | |
| 3112 if (sc->fes) | |
| 3113 { Statement *s; | |
| 3114 | |
| 3115 // Replace continue; with return 0; | |
| 3116 s = new ReturnStatement(0, new IntegerExp(0)); | |
| 3117 return s; | |
| 3118 } | |
| 3119 error("continue is not inside a loop"); | |
| 3120 } | |
| 3121 return this; | |
| 3122 } | |
| 3123 | |
| 336 | 3124 int ContinueStatement::blockExit() |
| 3125 { | |
| 3126 return ident ? BEgoto : BEcontinue; | |
| 3127 } | |
| 3128 | |
| 159 | 3129 int ContinueStatement::fallOffEnd() |
| 3130 { | |
| 3131 return FALSE; | |
| 3132 } | |
| 3133 | |
| 3134 void ContinueStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3135 { | |
| 3136 buf->writestring("continue"); | |
| 3137 if (ident) | |
| 3138 { buf->writebyte(' '); | |
| 3139 buf->writestring(ident->toChars()); | |
| 3140 } | |
| 3141 buf->writebyte(';'); | |
| 3142 buf->writenl(); | |
| 3143 } | |
| 3144 | |
| 3145 /******************************** SynchronizedStatement ***************************/ | |
| 3146 | |
| 3147 SynchronizedStatement::SynchronizedStatement(Loc loc, Expression *exp, Statement *body) | |
| 3148 : Statement(loc) | |
| 3149 { | |
| 3150 this->exp = exp; | |
| 3151 this->body = body; | |
| 3152 this->esync = NULL; | |
|
310
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[svn r331] Fixed, forgot to default initialize the SynchronizedStatement enclosinghandler.
lindquist
parents:
309
diff
changeset
|
3153 this->enclosinghandler = NULL; |
| 309 | 3154 // LLVMDC |
| 3155 this->llsync = NULL; | |
| 159 | 3156 } |
| 3157 | |
| 3158 SynchronizedStatement::SynchronizedStatement(Loc loc, elem *esync, Statement *body) | |
| 3159 : Statement(loc) | |
| 3160 { | |
| 3161 this->exp = NULL; | |
| 3162 this->body = body; | |
| 3163 this->esync = esync; | |
|
310
d20cf0dec9c1
[svn r331] Fixed, forgot to default initialize the SynchronizedStatement enclosinghandler.
lindquist
parents:
309
diff
changeset
|
3164 this->enclosinghandler = NULL; |
| 309 | 3165 // LLVMDC |
| 3166 this->llsync = NULL; | |
| 159 | 3167 } |
| 3168 | |
| 3169 Statement *SynchronizedStatement::syntaxCopy() | |
| 3170 { | |
| 3171 Expression *e = exp ? exp->syntaxCopy() : NULL; | |
| 3172 SynchronizedStatement *s = new SynchronizedStatement(loc, e, body ? body->syntaxCopy() : NULL); | |
| 3173 return s; | |
| 3174 } | |
| 3175 | |
| 3176 Statement *SynchronizedStatement::semantic(Scope *sc) | |
| 3177 { | |
| 3178 if (exp) | |
| 3179 { ClassDeclaration *cd; | |
| 3180 | |
| 3181 exp = exp->semantic(sc); | |
| 3182 exp = resolveProperties(sc, exp); | |
| 3183 cd = exp->type->isClassHandle(); | |
| 3184 if (!cd) | |
| 3185 error("can only synchronize on class objects, not '%s'", exp->type->toChars()); | |
| 3186 else if (cd->isInterfaceDeclaration()) | |
| 3187 { Type *t = new TypeIdentifier(0, Id::Object); | |
| 3188 | |
| 3189 t = t->semantic(0, sc); | |
| 3190 exp = new CastExp(loc, exp, t); | |
| 3191 exp = exp->semantic(sc); | |
| 3192 } | |
| 3193 } | |
| 3194 if (body) | |
| 309 | 3195 { |
| 3196 enclosinghandler = sc->tfOfTry; | |
| 3197 sc->tfOfTry = new EnclosingSynchro(this); | |
| 3198 body = body->semantic(sc); | |
| 3199 sc->tfOfTry = enclosinghandler; | |
| 3200 } | |
| 159 | 3201 return this; |
| 3202 } | |
| 3203 | |
| 3204 int SynchronizedStatement::hasBreak() | |
| 3205 { | |
| 3206 return FALSE; //TRUE; | |
| 3207 } | |
| 3208 | |
| 3209 int SynchronizedStatement::hasContinue() | |
| 3210 { | |
| 3211 return FALSE; //TRUE; | |
| 3212 } | |
| 3213 | |
| 3214 int SynchronizedStatement::usesEH() | |
| 3215 { | |
| 3216 return TRUE; | |
| 3217 } | |
| 3218 | |
| 336 | 3219 int SynchronizedStatement::blockExit() |
| 3220 { | |
| 3221 return body ? body->blockExit() : BEfallthru; | |
| 3222 } | |
| 3223 | |
| 159 | 3224 int SynchronizedStatement::fallOffEnd() |
| 3225 { | |
| 3226 return body ? body->fallOffEnd() : TRUE; | |
| 3227 } | |
| 3228 | |
| 3229 void SynchronizedStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3230 { | |
| 3231 buf->writestring("synchronized"); | |
| 3232 if (exp) | |
| 3233 { buf->writebyte('('); | |
| 3234 exp->toCBuffer(buf, hgs); | |
| 3235 buf->writebyte(')'); | |
| 3236 } | |
| 3237 if (body) | |
| 3238 { | |
| 3239 buf->writebyte(' '); | |
| 3240 body->toCBuffer(buf, hgs); | |
| 3241 } | |
| 3242 } | |
| 3243 | |
| 3244 /******************************** WithStatement ***************************/ | |
| 3245 | |
| 3246 WithStatement::WithStatement(Loc loc, Expression *exp, Statement *body) | |
| 3247 : Statement(loc) | |
| 3248 { | |
| 3249 this->exp = exp; | |
| 3250 this->body = body; | |
| 3251 wthis = NULL; | |
| 3252 } | |
| 3253 | |
| 3254 Statement *WithStatement::syntaxCopy() | |
| 3255 { | |
| 3256 WithStatement *s = new WithStatement(loc, exp->syntaxCopy(), body ? body->syntaxCopy() : NULL); | |
| 3257 return s; | |
| 3258 } | |
| 3259 | |
| 3260 Statement *WithStatement::semantic(Scope *sc) | |
| 3261 { ScopeDsymbol *sym; | |
| 3262 Initializer *init; | |
| 3263 | |
| 3264 //printf("WithStatement::semantic()\n"); | |
| 3265 exp = exp->semantic(sc); | |
| 3266 exp = resolveProperties(sc, exp); | |
| 3267 if (exp->op == TOKimport) | |
| 3268 { ScopeExp *es = (ScopeExp *)exp; | |
| 3269 | |
| 3270 sym = es->sds; | |
| 3271 } | |
| 3272 else if (exp->op == TOKtype) | |
| 3273 { TypeExp *es = (TypeExp *)exp; | |
| 3274 | |
| 3275 sym = es->type->toDsymbol(sc)->isScopeDsymbol(); | |
| 3276 if (!sym) | |
| 3277 { error("%s has no members", es->toChars()); | |
| 3278 body = body->semantic(sc); | |
| 3279 return this; | |
| 3280 } | |
| 3281 } | |
| 3282 else | |
| 3283 { Type *t = exp->type; | |
| 3284 | |
| 3285 assert(t); | |
| 3286 t = t->toBasetype(); | |
| 3287 if (t->isClassHandle()) | |
| 3288 { | |
| 3289 init = new ExpInitializer(loc, exp); | |
| 3290 wthis = new VarDeclaration(loc, exp->type, Id::withSym, init); | |
| 3291 wthis->semantic(sc); | |
| 3292 | |
| 3293 sym = new WithScopeSymbol(this); | |
| 3294 sym->parent = sc->scopesym; | |
| 3295 } | |
| 3296 else if (t->ty == Tstruct) | |
| 3297 { | |
| 3298 Expression *e = exp->addressOf(sc); | |
| 3299 init = new ExpInitializer(loc, e); | |
| 3300 wthis = new VarDeclaration(loc, e->type, Id::withSym, init); | |
| 3301 wthis->semantic(sc); | |
| 3302 sym = new WithScopeSymbol(this); | |
| 3303 sym->parent = sc->scopesym; | |
| 3304 } | |
| 3305 else | |
| 3306 { error("with expressions must be class objects, not '%s'", exp->type->toChars()); | |
| 3307 return NULL; | |
| 3308 } | |
| 3309 } | |
| 3310 sc = sc->push(sym); | |
| 3311 | |
| 3312 if (body) | |
| 3313 body = body->semantic(sc); | |
| 3314 | |
| 3315 sc->pop(); | |
| 3316 | |
| 3317 return this; | |
| 3318 } | |
| 3319 | |
| 3320 void WithStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3321 { | |
| 3322 buf->writestring("with ("); | |
| 3323 exp->toCBuffer(buf, hgs); | |
| 3324 buf->writestring(")\n"); | |
| 3325 if (body) | |
| 3326 body->toCBuffer(buf, hgs); | |
| 3327 } | |
| 3328 | |
| 3329 int WithStatement::usesEH() | |
| 3330 { | |
| 3331 return body ? body->usesEH() : 0; | |
| 3332 } | |
| 3333 | |
| 336 | 3334 int WithStatement::blockExit() |
| 3335 { | |
| 3336 int result = BEnone; | |
| 3337 if (exp->canThrow()) | |
| 3338 result = BEthrow; | |
| 3339 if (body) | |
| 3340 result |= body->blockExit(); | |
| 3341 else | |
| 3342 result |= BEfallthru; | |
| 3343 return result; | |
| 3344 } | |
| 3345 | |
| 159 | 3346 int WithStatement::fallOffEnd() |
| 3347 { | |
| 3348 return body ? body->fallOffEnd() : TRUE; | |
| 3349 } | |
| 3350 | |
| 3351 /******************************** TryCatchStatement ***************************/ | |
| 3352 | |
| 3353 TryCatchStatement::TryCatchStatement(Loc loc, Statement *body, Array *catches) | |
| 3354 : Statement(loc) | |
| 3355 { | |
| 3356 this->body = body; | |
| 3357 this->catches = catches; | |
| 3358 } | |
| 3359 | |
| 3360 Statement *TryCatchStatement::syntaxCopy() | |
| 3361 { | |
| 3362 Array *a = new Array(); | |
| 3363 a->setDim(catches->dim); | |
| 3364 for (int i = 0; i < a->dim; i++) | |
| 3365 { Catch *c; | |
| 3366 | |
| 3367 c = (Catch *)catches->data[i]; | |
| 3368 c = c->syntaxCopy(); | |
| 3369 a->data[i] = c; | |
| 3370 } | |
| 3371 TryCatchStatement *s = new TryCatchStatement(loc, body->syntaxCopy(), a); | |
| 3372 return s; | |
| 3373 } | |
| 3374 | |
| 3375 Statement *TryCatchStatement::semantic(Scope *sc) | |
| 3376 { | |
| 3377 body = body->semanticScope(sc, NULL /*this*/, NULL); | |
| 3378 | |
| 336 | 3379 /* Even if body is NULL, still do semantic analysis on catches |
| 3380 */ | |
| 3381 for (size_t i = 0; i < catches->dim; i++) | |
| 3382 { Catch *c = (Catch *)catches->data[i]; | |
| 159 | 3383 c->semantic(sc); |
| 3384 | |
| 3385 // Determine if current catch 'hides' any previous catches | |
| 336 | 3386 for (size_t j = 0; j < i; j++) |
| 159 | 3387 { Catch *cj = (Catch *)catches->data[j]; |
| 3388 char *si = c->loc.toChars(); | |
| 3389 char *sj = cj->loc.toChars(); | |
| 3390 | |
| 3391 if (c->type->toBasetype()->implicitConvTo(cj->type->toBasetype())) | |
| 3392 error("catch at %s hides catch at %s", sj, si); | |
| 3393 } | |
| 3394 } | |
| 3395 return this; | |
| 3396 } | |
| 3397 | |
| 3398 int TryCatchStatement::hasBreak() | |
| 3399 { | |
| 3400 return FALSE; //TRUE; | |
| 3401 } | |
| 3402 | |
| 3403 int TryCatchStatement::usesEH() | |
| 3404 { | |
| 3405 return TRUE; | |
| 3406 } | |
| 3407 | |
| 336 | 3408 int TryCatchStatement::blockExit() |
| 3409 { int result; | |
| 3410 | |
| 3411 assert(body); | |
| 3412 result = body->blockExit(); | |
| 3413 | |
| 3414 for (size_t i = 0; i < catches->dim; i++) | |
| 3415 { | |
| 3416 Catch *c = (Catch *)catches->data[i]; | |
| 3417 result |= c->blockExit(); | |
| 3418 } | |
| 3419 return result; | |
| 3420 } | |
| 3421 | |
| 159 | 3422 int TryCatchStatement::fallOffEnd() |
| 3423 { | |
| 3424 int result = FALSE; | |
| 3425 | |
| 3426 if (body) | |
| 3427 result = body->fallOffEnd(); | |
| 3428 for (int i = 0; i < catches->dim; i++) | |
| 3429 { Catch *c; | |
| 3430 | |
| 3431 c = (Catch *)catches->data[i]; | |
| 3432 if (c->handler) | |
| 3433 result |= c->handler->fallOffEnd(); | |
| 3434 } | |
| 3435 return result; | |
| 3436 } | |
| 3437 | |
| 3438 void TryCatchStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3439 { | |
| 3440 buf->writestring("try"); | |
| 3441 buf->writenl(); | |
| 3442 if (body) | |
| 3443 body->toCBuffer(buf, hgs); | |
| 336 | 3444 for (size_t i = 0; i < catches->dim; i++) |
| 159 | 3445 { |
| 3446 Catch *c = (Catch *)catches->data[i]; | |
| 3447 c->toCBuffer(buf, hgs); | |
| 3448 } | |
| 3449 } | |
| 3450 | |
| 3451 /******************************** Catch ***************************/ | |
| 3452 | |
| 3453 Catch::Catch(Loc loc, Type *t, Identifier *id, Statement *handler) | |
| 3454 { | |
| 3455 //printf("Catch(%s, loc = %s)\n", id->toChars(), loc.toChars()); | |
| 3456 this->loc = loc; | |
| 3457 this->type = t; | |
| 3458 this->ident = id; | |
| 3459 this->handler = handler; | |
| 3460 var = NULL; | |
| 3461 } | |
| 3462 | |
| 3463 Catch *Catch::syntaxCopy() | |
| 3464 { | |
| 3465 Catch *c = new Catch(loc, | |
| 3466 (type ? type->syntaxCopy() : NULL), | |
| 3467 ident, | |
| 3468 (handler ? handler->syntaxCopy() : NULL)); | |
| 3469 return c; | |
| 3470 } | |
| 3471 | |
| 3472 void Catch::semantic(Scope *sc) | |
| 3473 { ScopeDsymbol *sym; | |
| 3474 | |
| 3475 //printf("Catch::semantic(%s)\n", ident->toChars()); | |
| 3476 | |
| 3477 #ifndef IN_GCC | |
| 3478 if (sc->tf) | |
| 3479 { | |
| 3480 /* This is because the _d_local_unwind() gets the stack munged | |
| 3481 * up on this. The workaround is to place any try-catches into | |
| 3482 * a separate function, and call that. | |
| 3483 * To fix, have the compiler automatically convert the finally | |
| 3484 * body into a nested function. | |
| 3485 */ | |
| 3486 error(loc, "cannot put catch statement inside finally block"); | |
| 3487 } | |
| 3488 #endif | |
| 3489 | |
| 3490 sym = new ScopeDsymbol(); | |
| 3491 sym->parent = sc->scopesym; | |
| 3492 sc = sc->push(sym); | |
| 3493 | |
| 3494 if (!type) | |
| 3495 type = new TypeIdentifier(0, Id::Object); | |
| 3496 type = type->semantic(loc, sc); | |
| 3497 if (!type->toBasetype()->isClassHandle()) | |
| 3498 error("can only catch class objects, not '%s'", type->toChars()); | |
| 3499 else if (ident) | |
| 3500 { | |
| 3501 var = new VarDeclaration(loc, type, ident, NULL); | |
| 3502 var->parent = sc->parent; | |
| 3503 sc->insert(var); | |
| 3504 } | |
| 3505 handler = handler->semantic(sc); | |
| 3506 | |
| 3507 sc->pop(); | |
| 3508 } | |
| 3509 | |
| 336 | 3510 int Catch::blockExit() |
| 3511 { | |
| 3512 return handler ? handler->blockExit() : BEfallthru; | |
| 3513 } | |
| 3514 | |
| 159 | 3515 void Catch::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
| 3516 { | |
| 3517 buf->writestring("catch"); | |
| 3518 if (type) | |
| 3519 { buf->writebyte('('); | |
| 3520 type->toCBuffer(buf, ident, hgs); | |
| 3521 buf->writebyte(')'); | |
| 3522 } | |
| 3523 buf->writenl(); | |
| 3524 buf->writebyte('{'); | |
| 3525 buf->writenl(); | |
| 336 | 3526 if (handler) |
| 3527 handler->toCBuffer(buf, hgs); | |
| 159 | 3528 buf->writebyte('}'); |
| 3529 buf->writenl(); | |
| 3530 } | |
| 3531 | |
| 3532 /****************************** TryFinallyStatement ***************************/ | |
| 3533 | |
| 3534 TryFinallyStatement::TryFinallyStatement(Loc loc, Statement *body, Statement *finalbody) | |
| 3535 : Statement(loc) | |
| 3536 { | |
| 3537 this->body = body; | |
| 3538 this->finalbody = finalbody; | |
| 309 | 3539 this->enclosinghandler = NULL; |
| 159 | 3540 } |
| 3541 | |
| 3542 Statement *TryFinallyStatement::syntaxCopy() | |
| 3543 { | |
| 3544 TryFinallyStatement *s = new TryFinallyStatement(loc, | |
| 3545 body->syntaxCopy(), finalbody->syntaxCopy()); | |
| 3546 return s; | |
| 3547 } | |
| 3548 | |
| 3549 Statement *TryFinallyStatement::semantic(Scope *sc) | |
| 3550 { | |
| 3551 //printf("TryFinallyStatement::semantic()\n"); | |
| 3552 | |
| 309 | 3553 enclosinghandler = sc->tfOfTry; |
| 3554 sc->tfOfTry = new EnclosingTryFinally(this); | |
| 159 | 3555 body = body->semantic(sc); |
| 309 | 3556 sc->tfOfTry = enclosinghandler; |
| 159 | 3557 |
| 3558 sc = sc->push(); | |
| 3559 sc->tf = this; | |
| 3560 sc->sbreak = NULL; | |
| 3561 sc->scontinue = NULL; // no break or continue out of finally block | |
| 3562 finalbody = finalbody->semantic(sc); | |
| 3563 sc->pop(); | |
| 3564 return this; | |
| 3565 } | |
| 3566 | |
| 3567 void TryFinallyStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3568 { | |
| 3569 buf->printf("try\n{\n"); | |
| 3570 body->toCBuffer(buf, hgs); | |
| 3571 buf->printf("}\nfinally\n{\n"); | |
| 3572 finalbody->toCBuffer(buf, hgs); | |
| 3573 buf->writeByte('}'); | |
| 3574 buf->writenl(); | |
| 3575 } | |
| 3576 | |
| 3577 int TryFinallyStatement::hasBreak() | |
| 3578 { | |
| 3579 return FALSE; //TRUE; | |
| 3580 } | |
| 3581 | |
| 3582 int TryFinallyStatement::hasContinue() | |
| 3583 { | |
| 3584 return FALSE; //TRUE; | |
| 3585 } | |
| 3586 | |
| 3587 int TryFinallyStatement::usesEH() | |
| 3588 { | |
| 3589 return TRUE; | |
| 3590 } | |
| 3591 | |
| 336 | 3592 int TryFinallyStatement::blockExit() |
| 3593 { | |
| 3594 int result = body->blockExit(); | |
| 3595 return result; | |
| 3596 } | |
| 3597 | |
| 159 | 3598 int TryFinallyStatement::fallOffEnd() |
| 3599 { int result; | |
| 3600 | |
| 3601 result = body ? body->fallOffEnd() : TRUE; | |
| 3602 // if (finalbody) | |
| 3603 // result = finalbody->fallOffEnd(); | |
| 3604 return result; | |
| 3605 } | |
| 3606 | |
| 3607 /****************************** OnScopeStatement ***************************/ | |
| 3608 | |
| 3609 OnScopeStatement::OnScopeStatement(Loc loc, TOK tok, Statement *statement) | |
| 3610 : Statement(loc) | |
| 3611 { | |
| 3612 this->tok = tok; | |
| 3613 this->statement = statement; | |
| 3614 } | |
| 3615 | |
| 3616 Statement *OnScopeStatement::syntaxCopy() | |
| 3617 { | |
| 3618 OnScopeStatement *s = new OnScopeStatement(loc, | |
| 3619 tok, statement->syntaxCopy()); | |
| 3620 return s; | |
| 3621 } | |
| 3622 | |
| 3623 Statement *OnScopeStatement::semantic(Scope *sc) | |
| 3624 { | |
| 3625 /* semantic is called on results of scopeCode() */ | |
| 3626 return this; | |
| 3627 } | |
| 3628 | |
| 336 | 3629 int OnScopeStatement::blockExit() |
| 3630 { // At this point, this statement is just an empty placeholder | |
| 3631 return BEfallthru; | |
| 3632 } | |
| 3633 | |
| 159 | 3634 void OnScopeStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
| 3635 { | |
| 3636 buf->writestring(Token::toChars(tok)); | |
| 3637 buf->writebyte(' '); | |
| 3638 statement->toCBuffer(buf, hgs); | |
| 3639 } | |
| 3640 | |
| 3641 int OnScopeStatement::usesEH() | |
| 3642 { | |
| 3643 return (tok != TOKon_scope_success); | |
| 3644 } | |
| 3645 | |
| 3646 void OnScopeStatement::scopeCode(Statement **sentry, Statement **sexception, Statement **sfinally) | |
| 3647 { | |
| 3648 //printf("OnScopeStatement::scopeCode()\n"); | |
| 3649 //print(); | |
| 3650 *sentry = NULL; | |
| 3651 *sexception = NULL; | |
| 3652 *sfinally = NULL; | |
| 3653 switch (tok) | |
| 3654 { | |
| 3655 case TOKon_scope_exit: | |
| 3656 *sfinally = statement; | |
| 3657 break; | |
| 3658 | |
| 3659 case TOKon_scope_failure: | |
| 3660 *sexception = statement; | |
| 3661 break; | |
| 3662 | |
| 3663 case TOKon_scope_success: | |
| 3664 { | |
| 3665 /* Create: | |
| 3666 * sentry: int x = 0; | |
| 3667 * sexception: x = 1; | |
| 3668 * sfinally: if (!x) statement; | |
| 3669 */ | |
| 3670 static int num; | |
| 3671 char name[5 + sizeof(num) * 3 + 1]; | |
| 3672 sprintf(name, "__osf%d", ++num); | |
| 3673 Identifier *id = Lexer::idPool(name); | |
| 3674 | |
| 3675 ExpInitializer *ie = new ExpInitializer(loc, new IntegerExp(0)); | |
| 3676 VarDeclaration *v = new VarDeclaration(loc, Type::tint32, id, ie); | |
| 3677 *sentry = new DeclarationStatement(loc, v); | |
| 3678 | |
| 3679 Expression *e = new IntegerExp(1); | |
| 3680 e = new AssignExp(0, new VarExp(0, v), e); | |
| 3681 *sexception = new ExpStatement(0, e); | |
| 3682 | |
| 3683 e = new VarExp(0, v); | |
| 3684 e = new NotExp(0, e); | |
| 3685 *sfinally = new IfStatement(0, NULL, e, statement, NULL); | |
| 3686 | |
| 3687 break; | |
| 3688 } | |
| 3689 | |
| 3690 default: | |
| 3691 assert(0); | |
| 3692 } | |
| 3693 } | |
| 3694 | |
| 3695 /******************************** ThrowStatement ***************************/ | |
| 3696 | |
| 3697 ThrowStatement::ThrowStatement(Loc loc, Expression *exp) | |
| 3698 : Statement(loc) | |
| 3699 { | |
| 3700 this->exp = exp; | |
| 3701 } | |
| 3702 | |
| 3703 Statement *ThrowStatement::syntaxCopy() | |
| 3704 { | |
| 3705 ThrowStatement *s = new ThrowStatement(loc, exp->syntaxCopy()); | |
| 3706 return s; | |
| 3707 } | |
| 3708 | |
| 3709 Statement *ThrowStatement::semantic(Scope *sc) | |
| 3710 { | |
| 3711 //printf("ThrowStatement::semantic()\n"); | |
| 3712 | |
| 3713 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3714 fd->hasReturnExp |= 2; | |
| 3715 | |
| 3716 if (sc->incontract) | |
| 3717 error("Throw statements cannot be in contracts"); | |
| 3718 exp = exp->semantic(sc); | |
| 3719 exp = resolveProperties(sc, exp); | |
| 3720 if (!exp->type->toBasetype()->isClassHandle()) | |
| 3721 error("can only throw class objects, not type %s", exp->type->toChars()); | |
| 3722 return this; | |
| 3723 } | |
| 3724 | |
| 336 | 3725 int ThrowStatement::blockExit() |
| 3726 { | |
| 3727 return BEthrow; // obviously | |
| 3728 } | |
| 3729 | |
| 159 | 3730 int ThrowStatement::fallOffEnd() |
| 3731 { | |
| 3732 return FALSE; | |
| 3733 } | |
| 3734 | |
| 3735 void ThrowStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3736 { | |
| 3737 buf->printf("throw "); | |
| 3738 exp->toCBuffer(buf, hgs); | |
| 3739 buf->writeByte(';'); | |
| 3740 buf->writenl(); | |
| 3741 } | |
| 3742 | |
| 3743 /******************************** VolatileStatement **************************/ | |
| 3744 | |
| 3745 VolatileStatement::VolatileStatement(Loc loc, Statement *statement) | |
| 3746 : Statement(loc) | |
| 3747 { | |
| 3748 this->statement = statement; | |
| 309 | 3749 this->enclosinghandler = NULL; |
| 159 | 3750 } |
| 3751 | |
| 3752 Statement *VolatileStatement::syntaxCopy() | |
| 3753 { | |
| 3754 VolatileStatement *s = new VolatileStatement(loc, | |
| 3755 statement ? statement->syntaxCopy() : NULL); | |
| 3756 return s; | |
| 3757 } | |
| 3758 | |
| 3759 Statement *VolatileStatement::semantic(Scope *sc) | |
| 3760 { | |
| 309 | 3761 if (statement) |
| 3762 { | |
| 3763 enclosinghandler = sc->tfOfTry; | |
| 3764 sc->tfOfTry = new EnclosingVolatile(this); | |
| 3765 statement = statement->semantic(sc); | |
| 3766 sc->tfOfTry = enclosinghandler; | |
| 3767 } | |
| 159 | 3768 return this; |
| 3769 } | |
| 3770 | |
| 3771 Statements *VolatileStatement::flatten(Scope *sc) | |
| 3772 { | |
| 3773 Statements *a; | |
| 3774 | |
| 3775 a = statement ? statement->flatten(sc) : NULL; | |
| 3776 if (a) | |
| 3777 { for (int i = 0; i < a->dim; i++) | |
| 3778 { Statement *s = (Statement *)a->data[i]; | |
| 3779 | |
| 3780 s = new VolatileStatement(loc, s); | |
| 3781 a->data[i] = s; | |
| 3782 } | |
| 3783 } | |
| 3784 | |
| 3785 return a; | |
| 3786 } | |
| 3787 | |
| 336 | 3788 int VolatileStatement::blockExit() |
| 3789 { | |
| 3790 return statement ? statement->blockExit() : BEfallthru; | |
| 3791 } | |
| 3792 | |
| 159 | 3793 int VolatileStatement::fallOffEnd() |
| 3794 { | |
| 3795 return statement ? statement->fallOffEnd() : TRUE; | |
| 3796 } | |
| 3797 | |
| 3798 void VolatileStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3799 { | |
| 3800 buf->writestring("volatile"); | |
| 3801 if (statement) | |
| 3802 { if (statement->isScopeStatement()) | |
| 3803 buf->writenl(); | |
| 3804 else | |
| 3805 buf->writebyte(' '); | |
| 3806 statement->toCBuffer(buf, hgs); | |
| 3807 } | |
| 3808 } | |
| 3809 | |
| 3810 | |
| 3811 /******************************** GotoStatement ***************************/ | |
| 3812 | |
| 3813 GotoStatement::GotoStatement(Loc loc, Identifier *ident) | |
| 3814 : Statement(loc) | |
| 3815 { | |
| 3816 this->ident = ident; | |
| 3817 this->label = NULL; | |
| 3818 this->tf = NULL; | |
| 309 | 3819 this->enclosinghandler = NULL; |
| 159 | 3820 } |
| 3821 | |
| 3822 Statement *GotoStatement::syntaxCopy() | |
| 3823 { | |
| 3824 GotoStatement *s = new GotoStatement(loc, ident); | |
| 3825 return s; | |
| 3826 } | |
| 3827 | |
| 3828 Statement *GotoStatement::semantic(Scope *sc) | |
| 3829 { FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3830 | |
| 3831 //printf("GotoStatement::semantic()\n"); | |
| 3832 tf = sc->tf; | |
| 309 | 3833 enclosinghandler = sc->tfOfTry; |
| 159 | 3834 label = fd->searchLabel(ident); |
| 3835 if (!label->statement && sc->fes) | |
| 3836 { | |
| 3837 /* Either the goto label is forward referenced or it | |
| 3838 * is in the function that the enclosing foreach is in. | |
| 3839 * Can't know yet, so wrap the goto in a compound statement | |
| 3840 * so we can patch it later, and add it to a 'look at this later' | |
| 3841 * list. | |
| 3842 */ | |
| 3843 Statements *a = new Statements(); | |
| 3844 Statement *s; | |
| 3845 | |
| 3846 a->push(this); | |
| 3847 s = new CompoundStatement(loc, a); | |
| 3848 sc->fes->gotos.push(s); // 'look at this later' list | |
| 3849 return s; | |
| 3850 } | |
| 3851 if (label->statement && label->statement->tf != sc->tf) | |
| 3852 error("cannot goto in or out of finally block"); | |
| 3853 return this; | |
| 3854 } | |
| 3855 | |
| 336 | 3856 int GotoStatement::blockExit() |
| 3857 { | |
| 3858 //printf("GotoStatement::blockExit(%p)\n", this); | |
| 3859 return BEgoto; | |
| 3860 } | |
| 3861 | |
| 159 | 3862 int GotoStatement::fallOffEnd() |
| 3863 { | |
| 3864 return FALSE; | |
| 3865 } | |
| 3866 | |
| 3867 void GotoStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3868 { | |
| 3869 buf->writestring("goto "); | |
| 3870 buf->writestring(ident->toChars()); | |
| 3871 buf->writebyte(';'); | |
| 3872 buf->writenl(); | |
| 3873 } | |
| 3874 | |
| 3875 /******************************** LabelStatement ***************************/ | |
| 3876 | |
| 3877 LabelStatement::LabelStatement(Loc loc, Identifier *ident, Statement *statement) | |
| 3878 : Statement(loc) | |
| 3879 { | |
| 3880 this->ident = ident; | |
| 3881 this->statement = statement; | |
| 3882 this->tf = NULL; | |
| 309 | 3883 this->enclosinghandler = NULL; |
| 159 | 3884 this->lblock = NULL; |
| 3885 this->isReturnLabel = 0; | |
| 3886 this->llvmBB = NULL; | |
|
305
2b72433d5c8c
[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
lindquist
parents:
304
diff
changeset
|
3887 this->asmLabel = false; |
| 159 | 3888 } |
| 3889 | |
| 3890 Statement *LabelStatement::syntaxCopy() | |
| 3891 { | |
| 3892 LabelStatement *s = new LabelStatement(loc, ident, statement->syntaxCopy()); | |
| 3893 return s; | |
| 3894 } | |
| 3895 | |
| 3896 Statement *LabelStatement::semantic(Scope *sc) | |
| 3897 { LabelDsymbol *ls; | |
| 3898 FuncDeclaration *fd = sc->parent->isFuncDeclaration(); | |
| 3899 | |
| 3900 //printf("LabelStatement::semantic()\n"); | |
| 3901 ls = fd->searchLabel(ident); | |
| 3902 if (ls->statement) | |
| 3903 error("Label '%s' already defined", ls->toChars()); | |
| 3904 else | |
| 3905 ls->statement = this; | |
| 3906 tf = sc->tf; | |
| 309 | 3907 enclosinghandler = sc->tfOfTry; |
| 159 | 3908 sc = sc->push(); |
| 3909 sc->scopesym = sc->enclosing->scopesym; | |
| 3910 sc->callSuper |= CSXlabel; | |
| 3911 sc->slabel = this; | |
| 3912 if (statement) | |
| 3913 statement = statement->semantic(sc); | |
| 3914 sc->pop(); | |
|
305
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[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
lindquist
parents:
304
diff
changeset
|
3915 |
|
2b72433d5c8c
[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
lindquist
parents:
304
diff
changeset
|
3916 // LLVMDC put in labmap |
|
2b72433d5c8c
[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
lindquist
parents:
304
diff
changeset
|
3917 fd->labmap[ident->toChars()] = this; |
|
2b72433d5c8c
[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
lindquist
parents:
304
diff
changeset
|
3918 |
| 159 | 3919 return this; |
| 3920 } | |
| 3921 | |
| 3922 Statements *LabelStatement::flatten(Scope *sc) | |
| 3923 { | |
| 3924 Statements *a = NULL; | |
| 3925 | |
| 3926 if (statement) | |
| 3927 { | |
| 3928 a = statement->flatten(sc); | |
| 3929 if (a) | |
| 3930 { | |
| 3931 if (!a->dim) | |
| 3932 { | |
| 3933 a->push(new ExpStatement(loc, NULL)); | |
| 3934 } | |
| 3935 Statement *s = (Statement *)a->data[0]; | |
| 3936 | |
| 3937 s = new LabelStatement(loc, ident, s); | |
| 3938 a->data[0] = s; | |
| 3939 } | |
| 3940 } | |
| 3941 | |
| 3942 return a; | |
| 3943 } | |
| 3944 | |
| 3945 | |
| 3946 int LabelStatement::usesEH() | |
| 3947 { | |
| 3948 return statement ? statement->usesEH() : FALSE; | |
| 3949 } | |
| 3950 | |
| 336 | 3951 int LabelStatement::blockExit() |
| 3952 { | |
| 3953 //printf("LabelStatement::blockExit(%p)\n", this); | |
| 3954 return statement ? statement->blockExit() : BEfallthru; | |
| 3955 } | |
| 3956 | |
| 159 | 3957 int LabelStatement::fallOffEnd() |
| 3958 { | |
| 3959 return statement ? statement->fallOffEnd() : TRUE; | |
| 3960 } | |
| 3961 | |
| 3962 int LabelStatement::comeFrom() | |
| 3963 { | |
| 3964 //printf("LabelStatement::comeFrom()\n"); | |
| 3965 return TRUE; | |
| 3966 } | |
| 3967 | |
| 3968 void LabelStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) | |
| 3969 { | |
| 3970 buf->writestring(ident->toChars()); | |
| 3971 buf->writebyte(':'); | |
| 3972 buf->writenl(); | |
| 3973 if (statement) | |
| 3974 statement->toCBuffer(buf, hgs); | |
| 3975 } | |
| 3976 | |
| 3977 | |
| 3978 /******************************** LabelDsymbol ***************************/ | |
| 3979 | |
| 3980 LabelDsymbol::LabelDsymbol(Identifier *ident) | |
| 3981 : Dsymbol(ident) | |
| 3982 { | |
| 3983 statement = NULL; | |
| 3984 } | |
| 3985 | |
| 3986 LabelDsymbol *LabelDsymbol::isLabel() // is this a LabelDsymbol()? | |
| 3987 { | |
| 3988 return this; | |
| 3989 } | |
| 3990 | |
| 3991 |