Stmt.h revision 458cd9c8a79b25b87dcea43c9d97a4c59f194799
1//===--- Stmt.h - Classes for representing statements -----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Stmt interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_STMT_H 15#define LLVM_CLANG_AST_STMT_H 16 17#include "llvm/Support/Casting.h" 18#include "llvm/Support/raw_ostream.h" 19#include "clang/Basic/SourceLocation.h" 20#include "clang/AST/StmtIterator.h" 21#include "clang/AST/DeclGroup.h" 22#include "llvm/ADT/SmallVector.h" 23#include "llvm/ADT/iterator.h" 24#include "llvm/Bitcode/SerializationFwd.h" 25#include "clang/AST/ASTContext.h" 26#include <string> 27using llvm::dyn_cast_or_null; 28 29namespace clang { 30 class ASTContext; 31 class Expr; 32 class Decl; 33 class ParmVarDecl; 34 class QualType; 35 class IdentifierInfo; 36 class SourceManager; 37 class StringLiteral; 38 class SwitchStmt; 39 class PrinterHelper; 40 41 //===----------------------------------------------------------------------===// 42 // ExprIterator - Iterators for iterating over Stmt* arrays that contain 43 // only Expr*. This is needed because AST nodes use Stmt* arrays to store 44 // references to children (to be compatible with StmtIterator). 45 //===----------------------------------------------------------------------===// 46 47 class Stmt; 48 class Expr; 49 50 class ExprIterator { 51 Stmt** I; 52 public: 53 ExprIterator(Stmt** i) : I(i) {} 54 ExprIterator() : I(0) {} 55 ExprIterator& operator++() { ++I; return *this; } 56 ExprIterator operator-(size_t i) { return I-i; } 57 ExprIterator operator+(size_t i) { return I+i; } 58 Expr* operator[](size_t idx); 59 // FIXME: Verify that this will correctly return a signed distance. 60 signed operator-(const ExprIterator& R) const { return I - R.I; } 61 Expr* operator*() const; 62 Expr* operator->() const; 63 bool operator==(const ExprIterator& R) const { return I == R.I; } 64 bool operator!=(const ExprIterator& R) const { return I != R.I; } 65 bool operator>(const ExprIterator& R) const { return I > R.I; } 66 bool operator>=(const ExprIterator& R) const { return I >= R.I; } 67 }; 68 69 class ConstExprIterator { 70 Stmt* const * I; 71 public: 72 ConstExprIterator(Stmt* const* i) : I(i) {} 73 ConstExprIterator() : I(0) {} 74 ConstExprIterator& operator++() { ++I; return *this; } 75 ConstExprIterator operator+(size_t i) { return I+i; } 76 ConstExprIterator operator-(size_t i) { return I-i; } 77 const Expr * operator[](size_t idx) const; 78 signed operator-(const ConstExprIterator& R) const { return I - R.I; } 79 const Expr * operator*() const; 80 const Expr * operator->() const; 81 bool operator==(const ConstExprIterator& R) const { return I == R.I; } 82 bool operator!=(const ConstExprIterator& R) const { return I != R.I; } 83 bool operator>(const ConstExprIterator& R) const { return I > R.I; } 84 bool operator>=(const ConstExprIterator& R) const { return I >= R.I; } 85 }; 86 87//===----------------------------------------------------------------------===// 88// AST classes for statements. 89//===----------------------------------------------------------------------===// 90 91/// Stmt - This represents one statement. 92/// 93class Stmt { 94public: 95 enum StmtClass { 96 NoStmtClass = 0, 97#define STMT(CLASS, PARENT) CLASS##Class, 98#define FIRST_STMT(CLASS) firstStmtConstant = CLASS##Class, 99#define LAST_STMT(CLASS) lastStmtConstant = CLASS##Class, 100#define FIRST_EXPR(CLASS) firstExprConstant = CLASS##Class, 101#define LAST_EXPR(CLASS) lastExprConstant = CLASS##Class 102#include "clang/AST/StmtNodes.def" 103}; 104private: 105 const StmtClass sClass; 106 107 // Make vanilla 'new' and 'delete' illegal for Stmts. 108protected: 109 void* operator new(size_t bytes) throw() { 110 assert(0 && "Stmts cannot be allocated with regular 'new'."); 111 return 0; 112 } 113 void operator delete(void* data) throw() { 114 assert(0 && "Stmts cannot be released with regular 'delete'."); 115 } 116 117public: 118 // Only allow allocation of Stmts using the allocator in ASTContext 119 // or by doing a placement new. 120 void* operator new(size_t bytes, ASTContext& C, 121 unsigned alignment = 16) throw() { 122 return ::operator new(bytes, C, alignment); 123 } 124 125 void* operator new(size_t bytes, ASTContext* C, 126 unsigned alignment = 16) throw() { 127 return ::operator new(bytes, *C, alignment); 128 } 129 130 void* operator new(size_t bytes, void* mem) throw() { 131 return mem; 132 } 133 134 void operator delete(void*, ASTContext& C) throw() { } 135 void operator delete(void*, ASTContext& C, unsigned alignment) throw() { } 136 void operator delete(void*, std::size_t) throw() { } 137 138protected: 139 /// DestroyChildren - Invoked by destructors of subclasses of Stmt to 140 /// recursively release child AST nodes. 141 void DestroyChildren(ASTContext& Ctx); 142 143public: 144 Stmt(StmtClass SC) : sClass(SC) { 145 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 146 } 147 virtual ~Stmt() {} 148 149 virtual void Destroy(ASTContext &Ctx); 150 151 StmtClass getStmtClass() const { return sClass; } 152 const char *getStmtClassName() const; 153 154 /// SourceLocation tokens are not useful in isolation - they are low level 155 /// value objects created/interpreted by SourceManager. We assume AST 156 /// clients will have a pointer to the respective SourceManager. 157 virtual SourceRange getSourceRange() const = 0; 158 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 159 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 160 161 // global temp stats (until we have a per-module visitor) 162 static void addStmtClass(const StmtClass s); 163 static bool CollectingStats(bool enable=false); 164 static void PrintStats(); 165 166 /// dump - This does a local dump of the specified AST fragment. It dumps the 167 /// specified node and a few nodes underneath it, but not the whole subtree. 168 /// This is useful in a debugger. 169 void dump() const; 170 void dump(SourceManager &SM) const; 171 172 /// dumpAll - This does a dump of the specified AST fragment and all subtrees. 173 void dumpAll() const; 174 void dumpAll(SourceManager &SM) const; 175 176 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 177 /// back to its original source language syntax. 178 void dumpPretty() const; 179 void printPretty(llvm::raw_ostream &OS, PrinterHelper* = NULL, unsigned = 0, 180 bool NoIndent=false) const; 181 182 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 183 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 184 void viewAST() const; 185 186 // Implement isa<T> support. 187 static bool classof(const Stmt *) { return true; } 188 189 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 190 /// contain implicit control-flow in the order their subexpressions 191 /// are evaluated. This predicate returns true if this statement has 192 /// such implicit control-flow. Such statements are also specially handled 193 /// within CFGs. 194 bool hasImplicitControlFlow() const; 195 196 /// Child Iterators: All subclasses must implement child_begin and child_end 197 /// to permit easy iteration over the substatements/subexpessions of an 198 /// AST node. This permits easy iteration over all nodes in the AST. 199 typedef StmtIterator child_iterator; 200 typedef ConstStmtIterator const_child_iterator; 201 202 virtual child_iterator child_begin() = 0; 203 virtual child_iterator child_end() = 0; 204 205 const_child_iterator child_begin() const { 206 return const_child_iterator(const_cast<Stmt*>(this)->child_begin()); 207 } 208 209 const_child_iterator child_end() const { 210 return const_child_iterator(const_cast<Stmt*>(this)->child_end()); 211 } 212 213 void Emit(llvm::Serializer& S) const; 214 static Stmt* Create(llvm::Deserializer& D, ASTContext& C); 215 216 virtual void EmitImpl(llvm::Serializer& S) const { 217 // This method will eventually be a pure-virtual function. 218 assert (false && "Not implemented."); 219 } 220}; 221 222/// DeclStmt - Adaptor class for mixing declarations with statements and 223/// expressions. For example, CompoundStmt mixes statements, expressions 224/// and declarations (variables, types). Another example is ForStmt, where 225/// the first statement can be an expression or a declaration. 226/// 227class DeclStmt : public Stmt { 228protected: 229 DeclGroupRef DG; 230 SourceLocation StartLoc, EndLoc; 231public: 232 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 233 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 234 StartLoc(startLoc), EndLoc(endLoc) {} 235 236 virtual void Destroy(ASTContext& Ctx); 237 238 // hasSolitaryDecl - This method returns true if this DeclStmt refers 239 // to a single Decl. 240 bool hasSolitaryDecl() const { 241 return DG.hasSolitaryDecl(); 242 } 243 244 const Decl* getSolitaryDecl() const { 245 assert (hasSolitaryDecl() && 246 "Caller assumes this DeclStmt points to one Decl*"); 247 return *DG.begin(); 248 } 249 250 Decl* getSolitaryDecl() { 251 assert (hasSolitaryDecl() && 252 "Caller assumes this DeclStmt points to one Decl*"); 253 return *DG.begin(); 254 } 255 256 SourceLocation getStartLoc() const { return StartLoc; } 257 SourceLocation getEndLoc() const { return EndLoc; } 258 259 SourceRange getSourceRange() const { 260 return SourceRange(StartLoc, EndLoc); 261 } 262 263 static bool classof(const Stmt *T) { 264 return T->getStmtClass() == DeclStmtClass; 265 } 266 static bool classof(const DeclStmt *) { return true; } 267 268 // Iterators over subexpressions. 269 virtual child_iterator child_begin(); 270 virtual child_iterator child_end(); 271 272 class decl_iterator { 273 DeclGroupRef::iterator I; 274 public: 275 decl_iterator(DeclGroupRef::iterator i) : I(i) {} 276 decl_iterator& operator++() { ++I; return *this; } 277 bool operator==(const decl_iterator& R) const { 278 return R.I == I; 279 } 280 bool operator!=(const decl_iterator& R) const { 281 return R.I != I; 282 } 283 Decl* operator*() const { 284 return *I; 285 } 286 }; 287 288 class const_decl_iterator { 289 DeclGroupRef::const_iterator I; 290 public: 291 const_decl_iterator(DeclGroupRef::const_iterator i) : I(i) {} 292 const_decl_iterator& operator++() { ++I; return *this; } 293 bool operator==(const const_decl_iterator& R) const { 294 return R.I == I; 295 } 296 bool operator!=(const const_decl_iterator& R) const { 297 return R.I != I; 298 } 299 Decl* operator*() const { 300 return *I; 301 } 302 }; 303 304 decl_iterator decl_begin() { return DG.begin(); } 305 decl_iterator decl_end() { return DG.end(); } 306 const_decl_iterator decl_begin() const { return DG.begin(); } 307 const_decl_iterator decl_end() const { return DG.end(); } 308 309 // Serialization. 310 virtual void EmitImpl(llvm::Serializer& S) const; 311 static DeclStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 312}; 313 314/// NullStmt - This is the null statement ";": C99 6.8.3p3. 315/// 316class NullStmt : public Stmt { 317 SourceLocation SemiLoc; 318public: 319 NullStmt(SourceLocation L) : Stmt(NullStmtClass), SemiLoc(L) {} 320 321 SourceLocation getSemiLoc() const { return SemiLoc; } 322 323 virtual SourceRange getSourceRange() const { return SourceRange(SemiLoc); } 324 325 static bool classof(const Stmt *T) { 326 return T->getStmtClass() == NullStmtClass; 327 } 328 static bool classof(const NullStmt *) { return true; } 329 330 // Iterators 331 virtual child_iterator child_begin(); 332 virtual child_iterator child_end(); 333 334 virtual void EmitImpl(llvm::Serializer& S) const; 335 static NullStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 336}; 337 338/// CompoundStmt - This represents a group of statements like { stmt stmt }. 339/// 340class CompoundStmt : public Stmt { 341 Stmt** Body; 342 unsigned NumStmts; 343 SourceLocation LBracLoc, RBracLoc; 344public: 345 CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned numStmts, 346 SourceLocation LB, SourceLocation RB) 347 : Stmt(CompoundStmtClass), NumStmts(numStmts), LBracLoc(LB), RBracLoc(RB) { 348 if (NumStmts == 0) { 349 Body = 0; 350 return; 351 } 352 353 Body = new (C) Stmt*[NumStmts]; 354 memcpy(Body, StmtStart, numStmts * sizeof(*Body)); 355 } 356 357 bool body_empty() const { return NumStmts == 0; } 358 359 typedef Stmt** body_iterator; 360 body_iterator body_begin() { return Body; } 361 body_iterator body_end() { return Body + NumStmts; } 362 Stmt *body_back() { return NumStmts ? Body[NumStmts-1] : 0; } 363 364 typedef Stmt* const * const_body_iterator; 365 const_body_iterator body_begin() const { return Body; } 366 const_body_iterator body_end() const { return Body + NumStmts; } 367 const Stmt *body_back() const { return NumStmts ? Body[NumStmts-1] : 0; } 368 369 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 370 reverse_body_iterator body_rbegin() { 371 return reverse_body_iterator(body_end()); 372 } 373 reverse_body_iterator body_rend() { 374 return reverse_body_iterator(body_begin()); 375 } 376 377 typedef std::reverse_iterator<const_body_iterator> 378 const_reverse_body_iterator; 379 380 const_reverse_body_iterator body_rbegin() const { 381 return const_reverse_body_iterator(body_end()); 382 } 383 384 const_reverse_body_iterator body_rend() const { 385 return const_reverse_body_iterator(body_begin()); 386 } 387 388 virtual SourceRange getSourceRange() const { 389 return SourceRange(LBracLoc, RBracLoc); 390 } 391 392 SourceLocation getLBracLoc() const { return LBracLoc; } 393 SourceLocation getRBracLoc() const { return RBracLoc; } 394 395 static bool classof(const Stmt *T) { 396 return T->getStmtClass() == CompoundStmtClass; 397 } 398 static bool classof(const CompoundStmt *) { return true; } 399 400 // Iterators 401 virtual child_iterator child_begin(); 402 virtual child_iterator child_end(); 403 404 virtual void EmitImpl(llvm::Serializer& S) const; 405 static CompoundStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 406}; 407 408// SwitchCase is the base class for CaseStmt and DefaultStmt, 409class SwitchCase : public Stmt { 410protected: 411 // A pointer to the following CaseStmt or DefaultStmt class, 412 // used by SwitchStmt. 413 SwitchCase *NextSwitchCase; 414 415 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 416 417public: 418 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 419 420 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 421 422 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 423 424 Stmt *getSubStmt() { return v_getSubStmt(); } 425 426 virtual SourceRange getSourceRange() const { return SourceRange(); } 427 428 static bool classof(const Stmt *T) { 429 return T->getStmtClass() == CaseStmtClass || 430 T->getStmtClass() == DefaultStmtClass; 431 } 432 static bool classof(const SwitchCase *) { return true; } 433protected: 434 virtual Stmt* v_getSubStmt() = 0; 435}; 436 437class CaseStmt : public SwitchCase { 438 enum { SUBSTMT, LHS, RHS, END_EXPR }; 439 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 440 // GNU "case 1 ... 4" extension 441 SourceLocation CaseLoc; 442 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 443public: 444 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc) 445 : SwitchCase(CaseStmtClass) { 446 SubExprs[SUBSTMT] = 0; 447 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 448 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 449 CaseLoc = caseLoc; 450 } 451 452 SourceLocation getCaseLoc() const { return CaseLoc; } 453 454 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 455 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 456 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 457 const Expr *getLHS() const { 458 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 459 } 460 const Expr *getRHS() const { 461 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 462 } 463 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 464 465 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 466 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 467 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 468 469 470 virtual SourceRange getSourceRange() const { 471 // Handle deeply nested case statements with iteration instead of recursion. 472 const CaseStmt *CS = this; 473 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 474 CS = CS2; 475 476 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 477 } 478 static bool classof(const Stmt *T) { 479 return T->getStmtClass() == CaseStmtClass; 480 } 481 static bool classof(const CaseStmt *) { return true; } 482 483 // Iterators 484 virtual child_iterator child_begin(); 485 virtual child_iterator child_end(); 486 487 virtual void EmitImpl(llvm::Serializer& S) const; 488 static CaseStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 489}; 490 491class DefaultStmt : public SwitchCase { 492 Stmt* SubStmt; 493 SourceLocation DefaultLoc; 494 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 495public: 496 DefaultStmt(SourceLocation DL, Stmt *substmt) : 497 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL) {} 498 499 Stmt *getSubStmt() { return SubStmt; } 500 const Stmt *getSubStmt() const { return SubStmt; } 501 502 SourceLocation getDefaultLoc() const { return DefaultLoc; } 503 504 virtual SourceRange getSourceRange() const { 505 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 506 } 507 static bool classof(const Stmt *T) { 508 return T->getStmtClass() == DefaultStmtClass; 509 } 510 static bool classof(const DefaultStmt *) { return true; } 511 512 // Iterators 513 virtual child_iterator child_begin(); 514 virtual child_iterator child_end(); 515 516 virtual void EmitImpl(llvm::Serializer& S) const; 517 static DefaultStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 518}; 519 520class LabelStmt : public Stmt { 521 IdentifierInfo *Label; 522 Stmt *SubStmt; 523 SourceLocation IdentLoc; 524public: 525 LabelStmt(SourceLocation IL, IdentifierInfo *label, Stmt *substmt) 526 : Stmt(LabelStmtClass), Label(label), 527 SubStmt(substmt), IdentLoc(IL) {} 528 529 SourceLocation getIdentLoc() const { return IdentLoc; } 530 IdentifierInfo *getID() const { return Label; } 531 const char *getName() const; 532 Stmt *getSubStmt() { return SubStmt; } 533 const Stmt *getSubStmt() const { return SubStmt; } 534 535 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 536 void setSubStmt(Stmt *SS) { SubStmt = SS; } 537 538 virtual SourceRange getSourceRange() const { 539 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 540 } 541 static bool classof(const Stmt *T) { 542 return T->getStmtClass() == LabelStmtClass; 543 } 544 static bool classof(const LabelStmt *) { return true; } 545 546 // Iterators 547 virtual child_iterator child_begin(); 548 virtual child_iterator child_end(); 549 550 virtual void EmitImpl(llvm::Serializer& S) const; 551 static LabelStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 552}; 553 554 555/// IfStmt - This represents an if/then/else. 556/// 557class IfStmt : public Stmt { 558 enum { COND, THEN, ELSE, END_EXPR }; 559 Stmt* SubExprs[END_EXPR]; 560 SourceLocation IfLoc; 561public: 562 IfStmt(SourceLocation IL, Expr *cond, Stmt *then, Stmt *elsev = 0) 563 : Stmt(IfStmtClass) { 564 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 565 SubExprs[THEN] = then; 566 SubExprs[ELSE] = elsev; 567 IfLoc = IL; 568 } 569 570 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 571 const Stmt *getThen() const { return SubExprs[THEN]; } 572 const Stmt *getElse() const { return SubExprs[ELSE]; } 573 574 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 575 Stmt *getThen() { return SubExprs[THEN]; } 576 Stmt *getElse() { return SubExprs[ELSE]; } 577 578 virtual SourceRange getSourceRange() const { 579 if (SubExprs[ELSE]) 580 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 581 else 582 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 583 } 584 585 static bool classof(const Stmt *T) { 586 return T->getStmtClass() == IfStmtClass; 587 } 588 static bool classof(const IfStmt *) { return true; } 589 590 // Iterators 591 virtual child_iterator child_begin(); 592 virtual child_iterator child_end(); 593 594 virtual void EmitImpl(llvm::Serializer& S) const; 595 static IfStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 596}; 597 598/// SwitchStmt - This represents a 'switch' stmt. 599/// 600class SwitchStmt : public Stmt { 601 enum { COND, BODY, END_EXPR }; 602 Stmt* SubExprs[END_EXPR]; 603 // This points to a linked list of case and default statements. 604 SwitchCase *FirstCase; 605 SourceLocation SwitchLoc; 606public: 607 SwitchStmt(Expr *cond) : Stmt(SwitchStmtClass), FirstCase(0) { 608 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 609 SubExprs[BODY] = NULL; 610 } 611 612 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 613 const Stmt *getBody() const { return SubExprs[BODY]; } 614 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 615 616 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 617 Stmt *getBody() { return SubExprs[BODY]; } 618 SwitchCase *getSwitchCaseList() { return FirstCase; } 619 620 void setBody(Stmt *S, SourceLocation SL) { 621 SubExprs[BODY] = S; 622 SwitchLoc = SL; 623 } 624 void addSwitchCase(SwitchCase *SC) { 625 if (FirstCase) 626 SC->setNextSwitchCase(FirstCase); 627 628 FirstCase = SC; 629 } 630 virtual SourceRange getSourceRange() const { 631 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 632 } 633 static bool classof(const Stmt *T) { 634 return T->getStmtClass() == SwitchStmtClass; 635 } 636 static bool classof(const SwitchStmt *) { return true; } 637 638 // Iterators 639 virtual child_iterator child_begin(); 640 virtual child_iterator child_end(); 641 642 virtual void EmitImpl(llvm::Serializer& S) const; 643 static SwitchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 644}; 645 646 647/// WhileStmt - This represents a 'while' stmt. 648/// 649class WhileStmt : public Stmt { 650 enum { COND, BODY, END_EXPR }; 651 Stmt* SubExprs[END_EXPR]; 652 SourceLocation WhileLoc; 653public: 654 WhileStmt(Expr *cond, Stmt *body, SourceLocation WL) : Stmt(WhileStmtClass) { 655 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 656 SubExprs[BODY] = body; 657 WhileLoc = WL; 658 } 659 660 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 661 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 662 Stmt *getBody() { return SubExprs[BODY]; } 663 const Stmt *getBody() const { return SubExprs[BODY]; } 664 665 virtual SourceRange getSourceRange() const { 666 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 667 } 668 static bool classof(const Stmt *T) { 669 return T->getStmtClass() == WhileStmtClass; 670 } 671 static bool classof(const WhileStmt *) { return true; } 672 673 // Iterators 674 virtual child_iterator child_begin(); 675 virtual child_iterator child_end(); 676 677 virtual void EmitImpl(llvm::Serializer& S) const; 678 static WhileStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 679}; 680 681/// DoStmt - This represents a 'do/while' stmt. 682/// 683class DoStmt : public Stmt { 684 enum { COND, BODY, END_EXPR }; 685 Stmt* SubExprs[END_EXPR]; 686 SourceLocation DoLoc; 687public: 688 DoStmt(Stmt *body, Expr *cond, SourceLocation DL) 689 : Stmt(DoStmtClass), DoLoc(DL) { 690 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 691 SubExprs[BODY] = body; 692 DoLoc = DL; 693 } 694 695 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 696 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 697 Stmt *getBody() { return SubExprs[BODY]; } 698 const Stmt *getBody() const { return SubExprs[BODY]; } 699 700 virtual SourceRange getSourceRange() const { 701 return SourceRange(DoLoc, SubExprs[BODY]->getLocEnd()); 702 } 703 static bool classof(const Stmt *T) { 704 return T->getStmtClass() == DoStmtClass; 705 } 706 static bool classof(const DoStmt *) { return true; } 707 708 // Iterators 709 virtual child_iterator child_begin(); 710 virtual child_iterator child_end(); 711 712 virtual void EmitImpl(llvm::Serializer& S) const; 713 static DoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 714}; 715 716 717/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 718/// the init/cond/inc parts of the ForStmt will be null if they were not 719/// specified in the source. 720/// 721class ForStmt : public Stmt { 722 enum { INIT, COND, INC, BODY, END_EXPR }; 723 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 724 SourceLocation ForLoc; 725public: 726 ForStmt(Stmt *Init, Expr *Cond, Expr *Inc, Stmt *Body, SourceLocation FL) 727 : Stmt(ForStmtClass) { 728 SubExprs[INIT] = Init; 729 SubExprs[COND] = reinterpret_cast<Stmt*>(Cond); 730 SubExprs[INC] = reinterpret_cast<Stmt*>(Inc); 731 SubExprs[BODY] = Body; 732 ForLoc = FL; 733 } 734 735 Stmt *getInit() { return SubExprs[INIT]; } 736 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 737 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 738 Stmt *getBody() { return SubExprs[BODY]; } 739 740 const Stmt *getInit() const { return SubExprs[INIT]; } 741 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 742 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 743 const Stmt *getBody() const { return SubExprs[BODY]; } 744 745 virtual SourceRange getSourceRange() const { 746 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 747 } 748 static bool classof(const Stmt *T) { 749 return T->getStmtClass() == ForStmtClass; 750 } 751 static bool classof(const ForStmt *) { return true; } 752 753 // Iterators 754 virtual child_iterator child_begin(); 755 virtual child_iterator child_end(); 756 757 virtual void EmitImpl(llvm::Serializer& S) const; 758 static ForStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 759}; 760 761/// GotoStmt - This represents a direct goto. 762/// 763class GotoStmt : public Stmt { 764 LabelStmt *Label; 765 SourceLocation GotoLoc; 766 SourceLocation LabelLoc; 767public: 768 GotoStmt(LabelStmt *label, SourceLocation GL, SourceLocation LL) 769 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 770 771 LabelStmt *getLabel() const { return Label; } 772 773 virtual SourceRange getSourceRange() const { 774 return SourceRange(GotoLoc, LabelLoc); 775 } 776 static bool classof(const Stmt *T) { 777 return T->getStmtClass() == GotoStmtClass; 778 } 779 static bool classof(const GotoStmt *) { return true; } 780 781 // Iterators 782 virtual child_iterator child_begin(); 783 virtual child_iterator child_end(); 784 785 virtual void EmitImpl(llvm::Serializer& S) const; 786 static GotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 787}; 788 789/// IndirectGotoStmt - This represents an indirect goto. 790/// 791class IndirectGotoStmt : public Stmt { 792 Stmt *Target; 793 // FIXME: Add location information (e.g. SourceLocation objects). 794 // When doing so, update the serialization routines. 795public: 796 IndirectGotoStmt(Expr *target) : Stmt(IndirectGotoStmtClass), 797 Target((Stmt*)target){} 798 799 Expr *getTarget(); 800 const Expr *getTarget() const; 801 802 virtual SourceRange getSourceRange() const { return SourceRange(); } 803 804 static bool classof(const Stmt *T) { 805 return T->getStmtClass() == IndirectGotoStmtClass; 806 } 807 static bool classof(const IndirectGotoStmt *) { return true; } 808 809 // Iterators 810 virtual child_iterator child_begin(); 811 virtual child_iterator child_end(); 812 813 virtual void EmitImpl(llvm::Serializer& S) const; 814 static IndirectGotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 815}; 816 817 818/// ContinueStmt - This represents a continue. 819/// 820class ContinueStmt : public Stmt { 821 SourceLocation ContinueLoc; 822public: 823 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 824 825 virtual SourceRange getSourceRange() const { 826 return SourceRange(ContinueLoc); 827 } 828 static bool classof(const Stmt *T) { 829 return T->getStmtClass() == ContinueStmtClass; 830 } 831 static bool classof(const ContinueStmt *) { return true; } 832 833 // Iterators 834 virtual child_iterator child_begin(); 835 virtual child_iterator child_end(); 836 837 virtual void EmitImpl(llvm::Serializer& S) const; 838 static ContinueStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 839}; 840 841/// BreakStmt - This represents a break. 842/// 843class BreakStmt : public Stmt { 844 SourceLocation BreakLoc; 845public: 846 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 847 848 virtual SourceRange getSourceRange() const { return SourceRange(BreakLoc); } 849 850 static bool classof(const Stmt *T) { 851 return T->getStmtClass() == BreakStmtClass; 852 } 853 static bool classof(const BreakStmt *) { return true; } 854 855 // Iterators 856 virtual child_iterator child_begin(); 857 virtual child_iterator child_end(); 858 859 virtual void EmitImpl(llvm::Serializer& S) const; 860 static BreakStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 861}; 862 863 864/// ReturnStmt - This represents a return, optionally of an expression: 865/// return; 866/// return 4; 867/// 868/// Note that GCC allows return with no argument in a function declared to 869/// return a value, and it allows returning a value in functions declared to 870/// return void. We explicitly model this in the AST, which means you can't 871/// depend on the return type of the function and the presence of an argument. 872/// 873class ReturnStmt : public Stmt { 874 Stmt *RetExpr; 875 SourceLocation RetLoc; 876public: 877 ReturnStmt(SourceLocation RL, Expr *E = 0) : Stmt(ReturnStmtClass), 878 RetExpr((Stmt*) E), RetLoc(RL) {} 879 880 const Expr *getRetValue() const; 881 Expr *getRetValue(); 882 883 virtual SourceRange getSourceRange() const; 884 885 static bool classof(const Stmt *T) { 886 return T->getStmtClass() == ReturnStmtClass; 887 } 888 static bool classof(const ReturnStmt *) { return true; } 889 890 // Iterators 891 virtual child_iterator child_begin(); 892 virtual child_iterator child_end(); 893 894 virtual void EmitImpl(llvm::Serializer& S) const; 895 static ReturnStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 896}; 897 898/// AsmStmt - This represents a GNU inline-assembly statement extension. 899/// 900class AsmStmt : public Stmt { 901 SourceLocation AsmLoc, RParenLoc; 902 StringLiteral *AsmStr; 903 904 bool IsSimple; 905 bool IsVolatile; 906 907 unsigned NumOutputs; 908 unsigned NumInputs; 909 910 llvm::SmallVector<std::string, 4> Names; 911 llvm::SmallVector<StringLiteral*, 4> Constraints; 912 llvm::SmallVector<Stmt*, 4> Exprs; 913 914 llvm::SmallVector<StringLiteral*, 4> Clobbers; 915public: 916 AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile, 917 unsigned numoutputs, unsigned numinputs, 918 std::string *names, StringLiteral **constraints, 919 Expr **exprs, StringLiteral *asmstr, unsigned numclobbers, 920 StringLiteral **clobbers, SourceLocation rparenloc); 921 922 bool isVolatile() const { return IsVolatile; } 923 bool isSimple() const { return IsSimple; } 924 925 //===--- Asm String Analysis ---===// 926 927 const StringLiteral *getAsmString() const { return AsmStr; } 928 StringLiteral *getAsmString() { return AsmStr; } 929 930 /// AsmStringPiece - this is part of a decomposed asm string specification 931 /// (for use with the AnalyzeAsmString function below). An asm string is 932 /// considered to be a concatenation of these parts. 933 class AsmStringPiece { 934 public: 935 enum Kind { 936 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 937 Operand // Operand reference, with optional modifier %c4. 938 }; 939 private: 940 Kind MyKind; 941 std::string Str; 942 unsigned OperandNo; 943 public: 944 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 945 AsmStringPiece(unsigned OpNo, char Modifier) 946 : MyKind(Operand), Str(), OperandNo(OpNo) { 947 Str += Modifier; 948 } 949 950 bool isString() const { return MyKind == String; } 951 bool isOperand() const { return MyKind == Operand; } 952 953 const std::string &getString() const { 954 assert(isString()); 955 return Str; 956 } 957 958 unsigned getOperandNo() const { 959 assert(isOperand()); 960 return OperandNo; 961 } 962 963 /// getModifier - Get the modifier for this operand, if present. This 964 /// returns '\0' if there was no modifier. 965 char getModifier() const { 966 assert(isOperand()); 967 return Str[0]; 968 } 969 }; 970 971 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 972 /// it into pieces. If the asm string is erroneous, emit errors and return 973 /// true, otherwise return false. This handles canonicalization and 974 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 975 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 976 bool AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces, 977 ASTContext &C) const; 978 979 980 //===--- Output operands ---===// 981 982 unsigned getNumOutputs() const { return NumOutputs; } 983 984 const std::string &getOutputName(unsigned i) const { 985 return Names[i]; 986 } 987 988 /// getOutputConstraint - Return the constraint string for the specified 989 /// output operand. All output constraints are known to be non-empty (either 990 /// '=' or '+'). 991 std::string getOutputConstraint(unsigned i) const; 992 993 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 994 return Constraints[i]; 995 } 996 StringLiteral *getOutputConstraintLiteral(unsigned i) { 997 return Constraints[i]; 998 } 999 1000 1001 Expr *getOutputExpr(unsigned i); 1002 1003 const Expr *getOutputExpr(unsigned i) const { 1004 return const_cast<AsmStmt*>(this)->getOutputExpr(i); 1005 } 1006 1007 /// isOutputPlusConstraint - Return true if the specified output constraint 1008 /// is a "+" constraint (which is both an input and an output) or false if it 1009 /// is an "=" constraint (just an output). 1010 bool isOutputPlusConstraint(unsigned i) const { 1011 return getOutputConstraint(i)[0] == '+'; 1012 } 1013 1014 //===--- Input operands ---===// 1015 1016 unsigned getNumInputs() const { return NumInputs; } 1017 1018 const std::string &getInputName(unsigned i) const { 1019 return Names[i + NumOutputs]; 1020 } 1021 1022 /// getInputConstraint - Return the specified input constraint. Unlike output 1023 /// constraints, these can be empty. 1024 std::string getInputConstraint(unsigned i) const; 1025 1026 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1027 return Constraints[i + NumOutputs]; 1028 } 1029 StringLiteral *getInputConstraintLiteral(unsigned i) { 1030 return Constraints[i + NumOutputs]; 1031 } 1032 1033 1034 Expr *getInputExpr(unsigned i); 1035 1036 const Expr *getInputExpr(unsigned i) const { 1037 return const_cast<AsmStmt*>(this)->getInputExpr(i); 1038 } 1039 1040 //===--- Other ---===// 1041 1042 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1043 /// translate this into a numeric value needed to reference the same operand. 1044 /// This returns -1 if the operand name is invalid. 1045 int getNamedOperand(const std::string &SymbolicName) const; 1046 1047 1048 1049 unsigned getNumClobbers() const { return Clobbers.size(); } 1050 StringLiteral *getClobber(unsigned i) { return Clobbers[i]; } 1051 const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; } 1052 1053 virtual SourceRange getSourceRange() const { 1054 return SourceRange(AsmLoc, RParenLoc); 1055 } 1056 1057 static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;} 1058 static bool classof(const AsmStmt *) { return true; } 1059 1060 // Input expr iterators. 1061 1062 typedef ExprIterator inputs_iterator; 1063 typedef ConstExprIterator const_inputs_iterator; 1064 1065 inputs_iterator begin_inputs() { 1066 return &Exprs[0] + NumOutputs; 1067 } 1068 1069 inputs_iterator end_inputs() { 1070 return &Exprs[0] + NumOutputs + NumInputs; 1071 } 1072 1073 const_inputs_iterator begin_inputs() const { 1074 return &Exprs[0] + NumOutputs; 1075 } 1076 1077 const_inputs_iterator end_inputs() const { 1078 return &Exprs[0] + NumOutputs + NumInputs;} 1079 1080 // Output expr iterators. 1081 1082 typedef ExprIterator outputs_iterator; 1083 typedef ConstExprIterator const_outputs_iterator; 1084 1085 outputs_iterator begin_outputs() { return &Exprs[0]; } 1086 outputs_iterator end_outputs() { return &Exprs[0] + NumOutputs; } 1087 1088 const_outputs_iterator begin_outputs() const { return &Exprs[0]; } 1089 const_outputs_iterator end_outputs() const { return &Exprs[0] + NumOutputs; } 1090 1091 // Input name iterator. 1092 1093 const std::string *begin_output_names() const { 1094 return &Names[0]; 1095 } 1096 1097 const std::string *end_output_names() const { 1098 return &Names[0] + NumOutputs; 1099 } 1100 1101 // Child iterators 1102 1103 virtual child_iterator child_begin(); 1104 virtual child_iterator child_end(); 1105 1106 virtual void EmitImpl(llvm::Serializer& S) const; 1107 static AsmStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1108}; 1109 1110/// ObjCForCollectionStmt - This represents Objective-c's collection statement; 1111/// represented as 'for (element 'in' collection-expression)' stmt. 1112/// 1113class ObjCForCollectionStmt : public Stmt { 1114 enum { ELEM, COLLECTION, BODY, END_EXPR }; 1115 Stmt* SubExprs[END_EXPR]; // SubExprs[ELEM] is an expression or declstmt. 1116 SourceLocation ForLoc; 1117 SourceLocation RParenLoc; 1118public: 1119 ObjCForCollectionStmt(Stmt *Elem, Expr *Collect, Stmt *Body, 1120 SourceLocation FCL, SourceLocation RPL); 1121 1122 Stmt *getElement() { return SubExprs[ELEM]; } 1123 Expr *getCollection() { 1124 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1125 } 1126 Stmt *getBody() { return SubExprs[BODY]; } 1127 1128 const Stmt *getElement() const { return SubExprs[ELEM]; } 1129 const Expr *getCollection() const { 1130 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1131 } 1132 const Stmt *getBody() const { return SubExprs[BODY]; } 1133 1134 SourceLocation getRParenLoc() const { return RParenLoc; } 1135 1136 virtual SourceRange getSourceRange() const { 1137 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 1138 } 1139 static bool classof(const Stmt *T) { 1140 return T->getStmtClass() == ObjCForCollectionStmtClass; 1141 } 1142 static bool classof(const ObjCForCollectionStmt *) { return true; } 1143 1144 // Iterators 1145 virtual child_iterator child_begin(); 1146 virtual child_iterator child_end(); 1147 1148 virtual void EmitImpl(llvm::Serializer& S) const; 1149 static ObjCForCollectionStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1150}; 1151 1152/// ObjCAtCatchStmt - This represents objective-c's @catch statement. 1153class ObjCAtCatchStmt : public Stmt { 1154private: 1155 enum { BODY, NEXT_CATCH, END_EXPR }; 1156 ParmVarDecl *ExceptionDecl; 1157 Stmt *SubExprs[END_EXPR]; 1158 SourceLocation AtCatchLoc, RParenLoc; 1159 1160 // Used by deserialization. 1161 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc) 1162 : Stmt(ObjCAtCatchStmtClass), AtCatchLoc(atCatchLoc), RParenLoc(rparenloc) {} 1163 1164public: 1165 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc, 1166 ParmVarDecl *catchVarDecl, 1167 Stmt *atCatchStmt, Stmt *atCatchList); 1168 1169 const Stmt *getCatchBody() const { return SubExprs[BODY]; } 1170 Stmt *getCatchBody() { return SubExprs[BODY]; } 1171 1172 const ObjCAtCatchStmt *getNextCatchStmt() const { 1173 return static_cast<const ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1174 } 1175 ObjCAtCatchStmt *getNextCatchStmt() { 1176 return static_cast<ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1177 } 1178 1179 const ParmVarDecl *getCatchParamDecl() const { 1180 return ExceptionDecl; 1181 } 1182 ParmVarDecl *getCatchParamDecl() { 1183 return ExceptionDecl; 1184 } 1185 1186 SourceLocation getRParenLoc() const { return RParenLoc; } 1187 1188 virtual SourceRange getSourceRange() const { 1189 return SourceRange(AtCatchLoc, SubExprs[BODY]->getLocEnd()); 1190 } 1191 1192 bool hasEllipsis() const { return getCatchParamDecl() == 0; } 1193 1194 static bool classof(const Stmt *T) { 1195 return T->getStmtClass() == ObjCAtCatchStmtClass; 1196 } 1197 static bool classof(const ObjCAtCatchStmt *) { return true; } 1198 1199 virtual child_iterator child_begin(); 1200 virtual child_iterator child_end(); 1201 1202 virtual void EmitImpl(llvm::Serializer& S) const; 1203 static ObjCAtCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1204}; 1205 1206/// ObjCAtFinallyStmt - This represent objective-c's @finally Statement 1207class ObjCAtFinallyStmt : public Stmt { 1208 Stmt *AtFinallyStmt; 1209 SourceLocation AtFinallyLoc; 1210public: 1211 ObjCAtFinallyStmt(SourceLocation atFinallyLoc, Stmt *atFinallyStmt) 1212 : Stmt(ObjCAtFinallyStmtClass), 1213 AtFinallyStmt(atFinallyStmt), AtFinallyLoc(atFinallyLoc) {} 1214 1215 const Stmt *getFinallyBody () const { return AtFinallyStmt; } 1216 Stmt *getFinallyBody () { return AtFinallyStmt; } 1217 1218 virtual SourceRange getSourceRange() const { 1219 return SourceRange(AtFinallyLoc, AtFinallyStmt->getLocEnd()); 1220 } 1221 1222 static bool classof(const Stmt *T) { 1223 return T->getStmtClass() == ObjCAtFinallyStmtClass; 1224 } 1225 static bool classof(const ObjCAtFinallyStmt *) { return true; } 1226 1227 virtual child_iterator child_begin(); 1228 virtual child_iterator child_end(); 1229 1230 virtual void EmitImpl(llvm::Serializer& S) const; 1231 static ObjCAtFinallyStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1232}; 1233 1234/// ObjCAtTryStmt - This represent objective-c's over-all 1235/// @try ... @catch ... @finally statement. 1236class ObjCAtTryStmt : public Stmt { 1237private: 1238 enum { TRY, CATCH, FINALLY, END_EXPR }; 1239 Stmt* SubStmts[END_EXPR]; 1240 1241 SourceLocation AtTryLoc; 1242public: 1243 ObjCAtTryStmt(SourceLocation atTryLoc, Stmt *atTryStmt, 1244 Stmt *atCatchStmt, 1245 Stmt *atFinallyStmt) 1246 : Stmt(ObjCAtTryStmtClass) { 1247 SubStmts[TRY] = atTryStmt; 1248 SubStmts[CATCH] = atCatchStmt; 1249 SubStmts[FINALLY] = atFinallyStmt; 1250 AtTryLoc = atTryLoc; 1251 } 1252 1253 const Stmt *getTryBody() const { return SubStmts[TRY]; } 1254 Stmt *getTryBody() { return SubStmts[TRY]; } 1255 const ObjCAtCatchStmt *getCatchStmts() const { 1256 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1257 } 1258 ObjCAtCatchStmt *getCatchStmts() { 1259 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1260 } 1261 const ObjCAtFinallyStmt *getFinallyStmt() const { 1262 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1263 } 1264 ObjCAtFinallyStmt *getFinallyStmt() { 1265 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1266 } 1267 virtual SourceRange getSourceRange() const { 1268 return SourceRange(AtTryLoc, SubStmts[TRY]->getLocEnd()); 1269 } 1270 1271 static bool classof(const Stmt *T) { 1272 return T->getStmtClass() == ObjCAtTryStmtClass; 1273 } 1274 static bool classof(const ObjCAtTryStmt *) { return true; } 1275 1276 virtual child_iterator child_begin(); 1277 virtual child_iterator child_end(); 1278 1279 virtual void EmitImpl(llvm::Serializer& S) const; 1280 static ObjCAtTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1281}; 1282 1283/// ObjCAtSynchronizedStmt - This is for objective-c's @synchronized statement. 1284/// Example: @synchronized (sem) { 1285/// do-something; 1286/// } 1287/// 1288class ObjCAtSynchronizedStmt : public Stmt { 1289private: 1290 enum { SYNC_EXPR, SYNC_BODY, END_EXPR }; 1291 Stmt* SubStmts[END_EXPR]; 1292 SourceLocation AtSynchronizedLoc; 1293 1294public: 1295 ObjCAtSynchronizedStmt(SourceLocation atSynchronizedLoc, Stmt *synchExpr, 1296 Stmt *synchBody) 1297 : Stmt(ObjCAtSynchronizedStmtClass) { 1298 SubStmts[SYNC_EXPR] = synchExpr; 1299 SubStmts[SYNC_BODY] = synchBody; 1300 AtSynchronizedLoc = atSynchronizedLoc; 1301 } 1302 1303 const CompoundStmt *getSynchBody() const { 1304 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1305 } 1306 CompoundStmt *getSynchBody() { 1307 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1308 } 1309 1310 const Expr *getSynchExpr() const { 1311 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1312 } 1313 Expr *getSynchExpr() { 1314 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1315 } 1316 1317 virtual SourceRange getSourceRange() const { 1318 return SourceRange(AtSynchronizedLoc, getSynchBody()->getLocEnd()); 1319 } 1320 1321 static bool classof(const Stmt *T) { 1322 return T->getStmtClass() == ObjCAtSynchronizedStmtClass; 1323 } 1324 static bool classof(const ObjCAtSynchronizedStmt *) { return true; } 1325 1326 virtual child_iterator child_begin(); 1327 virtual child_iterator child_end(); 1328 1329 virtual void EmitImpl(llvm::Serializer& S) const; 1330 static ObjCAtSynchronizedStmt* CreateImpl(llvm::Deserializer& D, 1331 ASTContext& C); 1332}; 1333 1334/// ObjCAtThrowStmt - This represents objective-c's @throw statement. 1335class ObjCAtThrowStmt : public Stmt { 1336 Stmt *Throw; 1337 SourceLocation AtThrowLoc; 1338public: 1339 ObjCAtThrowStmt(SourceLocation atThrowLoc, Stmt *throwExpr) 1340 : Stmt(ObjCAtThrowStmtClass), Throw(throwExpr) { 1341 AtThrowLoc = atThrowLoc; 1342 } 1343 1344 const Expr *getThrowExpr() const { return reinterpret_cast<Expr*>(Throw); } 1345 Expr *getThrowExpr() { return reinterpret_cast<Expr*>(Throw); } 1346 1347 virtual SourceRange getSourceRange() const { 1348 if (Throw) 1349 return SourceRange(AtThrowLoc, Throw->getLocEnd()); 1350 else 1351 return SourceRange(AtThrowLoc); 1352 } 1353 1354 static bool classof(const Stmt *T) { 1355 return T->getStmtClass() == ObjCAtThrowStmtClass; 1356 } 1357 static bool classof(const ObjCAtThrowStmt *) { return true; } 1358 1359 virtual child_iterator child_begin(); 1360 virtual child_iterator child_end(); 1361 1362 virtual void EmitImpl(llvm::Serializer& S) const; 1363 static ObjCAtThrowStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1364}; 1365 1366/// CXXCatchStmt - This represents a C++ catch block. 1367class CXXCatchStmt : public Stmt { 1368 SourceLocation CatchLoc; 1369 /// The exception-declaration of the type. 1370 Decl *ExceptionDecl; 1371 /// The handler block. 1372 Stmt *HandlerBlock; 1373 1374public: 1375 CXXCatchStmt(SourceLocation catchLoc, Decl *exDecl, Stmt *handlerBlock) 1376 : Stmt(CXXCatchStmtClass), CatchLoc(catchLoc), ExceptionDecl(exDecl), 1377 HandlerBlock(handlerBlock) {} 1378 1379 virtual void Destroy(ASTContext& Ctx); 1380 1381 virtual SourceRange getSourceRange() const { 1382 return SourceRange(CatchLoc, HandlerBlock->getLocEnd()); 1383 } 1384 1385 Decl *getExceptionDecl() { return ExceptionDecl; } 1386 QualType getCaughtType(); 1387 Stmt *getHandlerBlock() { return HandlerBlock; } 1388 1389 static bool classof(const Stmt *T) { 1390 return T->getStmtClass() == CXXCatchStmtClass; 1391 } 1392 static bool classof(const CXXCatchStmt *) { return true; } 1393 1394 virtual child_iterator child_begin(); 1395 virtual child_iterator child_end(); 1396 1397 virtual void EmitImpl(llvm::Serializer& S) const; 1398 static CXXCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1399}; 1400 1401/// CXXTryStmt - A C++ try block, including all handlers. 1402class CXXTryStmt : public Stmt { 1403 SourceLocation TryLoc; 1404 // First place is the guarded CompoundStatement. Subsequent are the handlers. 1405 // More than three handlers should be rare. 1406 llvm::SmallVector<Stmt*, 4> Stmts; 1407 1408public: 1409 CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock, 1410 Stmt **handlers, unsigned numHandlers); 1411 1412 virtual SourceRange getSourceRange() const { 1413 return SourceRange(TryLoc, Stmts.back()->getLocEnd()); 1414 } 1415 1416 CompoundStmt *getTryBlock() { return llvm::cast<CompoundStmt>(Stmts[0]); } 1417 const CompoundStmt *getTryBlock() const { 1418 return llvm::cast<CompoundStmt>(Stmts[0]); 1419 } 1420 1421 unsigned getNumHandlers() const { return Stmts.size() - 1; } 1422 CXXCatchStmt *getHandler(unsigned i) { 1423 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1424 } 1425 const CXXCatchStmt *getHandler(unsigned i) const { 1426 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1427 } 1428 1429 static bool classof(const Stmt *T) { 1430 return T->getStmtClass() == CXXTryStmtClass; 1431 } 1432 static bool classof(const CXXTryStmt *) { return true; } 1433 1434 virtual child_iterator child_begin(); 1435 virtual child_iterator child_end(); 1436 1437 virtual void EmitImpl(llvm::Serializer& S) const; 1438 static CXXTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1439}; 1440 1441} // end namespace clang 1442 1443#endif 1444