Stmt.h revision c2ee10d79f70036af652a395ac1f8273f3d04e12
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&, unsigned) throw() { } 135 void operator delete(void*, ASTContext*, unsigned) throw() { } 136 void operator delete(void*, std::size_t) throw() { } 137 void operator delete(void*, void*) throw() { } 138 139protected: 140 /// DestroyChildren - Invoked by destructors of subclasses of Stmt to 141 /// recursively release child AST nodes. 142 void DestroyChildren(ASTContext& Ctx); 143 144public: 145 Stmt(StmtClass SC) : sClass(SC) { 146 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 147 } 148 virtual ~Stmt() {} 149 150 virtual void Destroy(ASTContext &Ctx); 151 152 StmtClass getStmtClass() const { return sClass; } 153 const char *getStmtClassName() const; 154 155 /// SourceLocation tokens are not useful in isolation - they are low level 156 /// value objects created/interpreted by SourceManager. We assume AST 157 /// clients will have a pointer to the respective SourceManager. 158 virtual SourceRange getSourceRange() const = 0; 159 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 160 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 161 162 // global temp stats (until we have a per-module visitor) 163 static void addStmtClass(const StmtClass s); 164 static bool CollectingStats(bool enable=false); 165 static void PrintStats(); 166 167 /// dump - This does a local dump of the specified AST fragment. It dumps the 168 /// specified node and a few nodes underneath it, but not the whole subtree. 169 /// This is useful in a debugger. 170 void dump() const; 171 void dump(SourceManager &SM) const; 172 173 /// dumpAll - This does a dump of the specified AST fragment and all subtrees. 174 void dumpAll() const; 175 void dumpAll(SourceManager &SM) const; 176 177 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 178 /// back to its original source language syntax. 179 void dumpPretty() const; 180 void printPretty(llvm::raw_ostream &OS, PrinterHelper* = NULL, unsigned = 0, 181 bool NoIndent=false) const; 182 183 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 184 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 185 void viewAST() const; 186 187 // Implement isa<T> support. 188 static bool classof(const Stmt *) { return true; } 189 190 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 191 /// contain implicit control-flow in the order their subexpressions 192 /// are evaluated. This predicate returns true if this statement has 193 /// such implicit control-flow. Such statements are also specially handled 194 /// within CFGs. 195 bool hasImplicitControlFlow() const; 196 197 /// Child Iterators: All subclasses must implement child_begin and child_end 198 /// to permit easy iteration over the substatements/subexpessions of an 199 /// AST node. This permits easy iteration over all nodes in the AST. 200 typedef StmtIterator child_iterator; 201 typedef ConstStmtIterator const_child_iterator; 202 203 virtual child_iterator child_begin() = 0; 204 virtual child_iterator child_end() = 0; 205 206 const_child_iterator child_begin() const { 207 return const_child_iterator(const_cast<Stmt*>(this)->child_begin()); 208 } 209 210 const_child_iterator child_end() const { 211 return const_child_iterator(const_cast<Stmt*>(this)->child_end()); 212 } 213 214 void Emit(llvm::Serializer& S) const; 215 static Stmt* Create(llvm::Deserializer& D, ASTContext& C); 216 217 virtual void EmitImpl(llvm::Serializer& S) const { 218 // This method will eventually be a pure-virtual function. 219 assert (false && "Not implemented."); 220 } 221}; 222 223/// DeclStmt - Adaptor class for mixing declarations with statements and 224/// expressions. For example, CompoundStmt mixes statements, expressions 225/// and declarations (variables, types). Another example is ForStmt, where 226/// the first statement can be an expression or a declaration. 227/// 228class DeclStmt : public Stmt { 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 /// isSingleDecl - This method returns true if this DeclStmt refers 239 /// to a single Decl. 240 bool isSingleDecl() const { 241 return DG.isSingleDecl(); 242 } 243 244 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 245 Decl *getSingleDecl() { return DG.getSingleDecl(); } 246 247 const DeclGroupRef getDeclGroup() const { return DG; } 248 DeclGroupRef getDeclGroup() { return DG; } 249 250 SourceLocation getStartLoc() const { return StartLoc; } 251 SourceLocation getEndLoc() const { return EndLoc; } 252 253 SourceRange getSourceRange() const { 254 return SourceRange(StartLoc, EndLoc); 255 } 256 257 static bool classof(const Stmt *T) { 258 return T->getStmtClass() == DeclStmtClass; 259 } 260 static bool classof(const DeclStmt *) { return true; } 261 262 // Iterators over subexpressions. 263 virtual child_iterator child_begin(); 264 virtual child_iterator child_end(); 265 266 typedef DeclGroupRef::iterator decl_iterator; 267 typedef DeclGroupRef::const_iterator const_decl_iterator; 268 269 decl_iterator decl_begin() { return DG.begin(); } 270 decl_iterator decl_end() { return DG.end(); } 271 const_decl_iterator decl_begin() const { return DG.begin(); } 272 const_decl_iterator decl_end() const { return DG.end(); } 273 274 // Serialization. 275 virtual void EmitImpl(llvm::Serializer& S) const; 276 static DeclStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 277}; 278 279/// NullStmt - This is the null statement ";": C99 6.8.3p3. 280/// 281class NullStmt : public Stmt { 282 SourceLocation SemiLoc; 283public: 284 NullStmt(SourceLocation L) : Stmt(NullStmtClass), SemiLoc(L) {} 285 286 SourceLocation getSemiLoc() const { return SemiLoc; } 287 288 virtual SourceRange getSourceRange() const { return SourceRange(SemiLoc); } 289 290 static bool classof(const Stmt *T) { 291 return T->getStmtClass() == NullStmtClass; 292 } 293 static bool classof(const NullStmt *) { return true; } 294 295 // Iterators 296 virtual child_iterator child_begin(); 297 virtual child_iterator child_end(); 298 299 virtual void EmitImpl(llvm::Serializer& S) const; 300 static NullStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 301}; 302 303/// CompoundStmt - This represents a group of statements like { stmt stmt }. 304/// 305class CompoundStmt : public Stmt { 306 Stmt** Body; 307 unsigned NumStmts; 308 SourceLocation LBracLoc, RBracLoc; 309public: 310 CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned numStmts, 311 SourceLocation LB, SourceLocation RB) 312 : Stmt(CompoundStmtClass), NumStmts(numStmts), LBracLoc(LB), RBracLoc(RB) { 313 if (NumStmts == 0) { 314 Body = 0; 315 return; 316 } 317 318 Body = new (C) Stmt*[NumStmts]; 319 memcpy(Body, StmtStart, numStmts * sizeof(*Body)); 320 } 321 322 bool body_empty() const { return NumStmts == 0; } 323 324 typedef Stmt** body_iterator; 325 body_iterator body_begin() { return Body; } 326 body_iterator body_end() { return Body + NumStmts; } 327 Stmt *body_back() { return NumStmts ? Body[NumStmts-1] : 0; } 328 329 typedef Stmt* const * const_body_iterator; 330 const_body_iterator body_begin() const { return Body; } 331 const_body_iterator body_end() const { return Body + NumStmts; } 332 const Stmt *body_back() const { return NumStmts ? Body[NumStmts-1] : 0; } 333 334 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 335 reverse_body_iterator body_rbegin() { 336 return reverse_body_iterator(body_end()); 337 } 338 reverse_body_iterator body_rend() { 339 return reverse_body_iterator(body_begin()); 340 } 341 342 typedef std::reverse_iterator<const_body_iterator> 343 const_reverse_body_iterator; 344 345 const_reverse_body_iterator body_rbegin() const { 346 return const_reverse_body_iterator(body_end()); 347 } 348 349 const_reverse_body_iterator body_rend() const { 350 return const_reverse_body_iterator(body_begin()); 351 } 352 353 virtual SourceRange getSourceRange() const { 354 return SourceRange(LBracLoc, RBracLoc); 355 } 356 357 SourceLocation getLBracLoc() const { return LBracLoc; } 358 SourceLocation getRBracLoc() const { return RBracLoc; } 359 360 static bool classof(const Stmt *T) { 361 return T->getStmtClass() == CompoundStmtClass; 362 } 363 static bool classof(const CompoundStmt *) { return true; } 364 365 // Iterators 366 virtual child_iterator child_begin(); 367 virtual child_iterator child_end(); 368 369 virtual void EmitImpl(llvm::Serializer& S) const; 370 static CompoundStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 371}; 372 373// SwitchCase is the base class for CaseStmt and DefaultStmt, 374class SwitchCase : public Stmt { 375protected: 376 // A pointer to the following CaseStmt or DefaultStmt class, 377 // used by SwitchStmt. 378 SwitchCase *NextSwitchCase; 379 380 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 381 382public: 383 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 384 385 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 386 387 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 388 389 Stmt *getSubStmt() { return v_getSubStmt(); } 390 391 virtual SourceRange getSourceRange() const { return SourceRange(); } 392 393 static bool classof(const Stmt *T) { 394 return T->getStmtClass() == CaseStmtClass || 395 T->getStmtClass() == DefaultStmtClass; 396 } 397 static bool classof(const SwitchCase *) { return true; } 398protected: 399 virtual Stmt* v_getSubStmt() = 0; 400}; 401 402class CaseStmt : public SwitchCase { 403 enum { SUBSTMT, LHS, RHS, END_EXPR }; 404 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 405 // GNU "case 1 ... 4" extension 406 SourceLocation CaseLoc; 407 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 408public: 409 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc) 410 : SwitchCase(CaseStmtClass) { 411 SubExprs[SUBSTMT] = 0; 412 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 413 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 414 CaseLoc = caseLoc; 415 } 416 417 SourceLocation getCaseLoc() const { return CaseLoc; } 418 419 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 420 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 421 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 422 const Expr *getLHS() const { 423 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 424 } 425 const Expr *getRHS() const { 426 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 427 } 428 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 429 430 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 431 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 432 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 433 434 435 virtual SourceRange getSourceRange() const { 436 // Handle deeply nested case statements with iteration instead of recursion. 437 const CaseStmt *CS = this; 438 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 439 CS = CS2; 440 441 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 442 } 443 static bool classof(const Stmt *T) { 444 return T->getStmtClass() == CaseStmtClass; 445 } 446 static bool classof(const CaseStmt *) { return true; } 447 448 // Iterators 449 virtual child_iterator child_begin(); 450 virtual child_iterator child_end(); 451 452 virtual void EmitImpl(llvm::Serializer& S) const; 453 static CaseStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 454}; 455 456class DefaultStmt : public SwitchCase { 457 Stmt* SubStmt; 458 SourceLocation DefaultLoc; 459 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 460public: 461 DefaultStmt(SourceLocation DL, Stmt *substmt) : 462 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL) {} 463 464 Stmt *getSubStmt() { return SubStmt; } 465 const Stmt *getSubStmt() const { return SubStmt; } 466 467 SourceLocation getDefaultLoc() const { return DefaultLoc; } 468 469 virtual SourceRange getSourceRange() const { 470 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 471 } 472 static bool classof(const Stmt *T) { 473 return T->getStmtClass() == DefaultStmtClass; 474 } 475 static bool classof(const DefaultStmt *) { return true; } 476 477 // Iterators 478 virtual child_iterator child_begin(); 479 virtual child_iterator child_end(); 480 481 virtual void EmitImpl(llvm::Serializer& S) const; 482 static DefaultStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 483}; 484 485class LabelStmt : public Stmt { 486 IdentifierInfo *Label; 487 Stmt *SubStmt; 488 SourceLocation IdentLoc; 489public: 490 LabelStmt(SourceLocation IL, IdentifierInfo *label, Stmt *substmt) 491 : Stmt(LabelStmtClass), Label(label), 492 SubStmt(substmt), IdentLoc(IL) {} 493 494 SourceLocation getIdentLoc() const { return IdentLoc; } 495 IdentifierInfo *getID() const { return Label; } 496 const char *getName() const; 497 Stmt *getSubStmt() { return SubStmt; } 498 const Stmt *getSubStmt() const { return SubStmt; } 499 500 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 501 void setSubStmt(Stmt *SS) { SubStmt = SS; } 502 503 virtual SourceRange getSourceRange() const { 504 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 505 } 506 static bool classof(const Stmt *T) { 507 return T->getStmtClass() == LabelStmtClass; 508 } 509 static bool classof(const LabelStmt *) { return true; } 510 511 // Iterators 512 virtual child_iterator child_begin(); 513 virtual child_iterator child_end(); 514 515 virtual void EmitImpl(llvm::Serializer& S) const; 516 static LabelStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 517}; 518 519 520/// IfStmt - This represents an if/then/else. 521/// 522class IfStmt : public Stmt { 523 enum { COND, THEN, ELSE, END_EXPR }; 524 Stmt* SubExprs[END_EXPR]; 525 SourceLocation IfLoc; 526public: 527 IfStmt(SourceLocation IL, Expr *cond, Stmt *then, Stmt *elsev = 0) 528 : Stmt(IfStmtClass) { 529 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 530 SubExprs[THEN] = then; 531 SubExprs[ELSE] = elsev; 532 IfLoc = IL; 533 } 534 535 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 536 const Stmt *getThen() const { return SubExprs[THEN]; } 537 const Stmt *getElse() const { return SubExprs[ELSE]; } 538 539 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 540 Stmt *getThen() { return SubExprs[THEN]; } 541 Stmt *getElse() { return SubExprs[ELSE]; } 542 543 virtual SourceRange getSourceRange() const { 544 if (SubExprs[ELSE]) 545 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 546 else 547 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 548 } 549 550 static bool classof(const Stmt *T) { 551 return T->getStmtClass() == IfStmtClass; 552 } 553 static bool classof(const IfStmt *) { return true; } 554 555 // Iterators 556 virtual child_iterator child_begin(); 557 virtual child_iterator child_end(); 558 559 virtual void EmitImpl(llvm::Serializer& S) const; 560 static IfStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 561}; 562 563/// SwitchStmt - This represents a 'switch' stmt. 564/// 565class SwitchStmt : public Stmt { 566 enum { COND, BODY, END_EXPR }; 567 Stmt* SubExprs[END_EXPR]; 568 // This points to a linked list of case and default statements. 569 SwitchCase *FirstCase; 570 SourceLocation SwitchLoc; 571public: 572 SwitchStmt(Expr *cond) : Stmt(SwitchStmtClass), FirstCase(0) { 573 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 574 SubExprs[BODY] = NULL; 575 } 576 577 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 578 const Stmt *getBody() const { return SubExprs[BODY]; } 579 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 580 581 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 582 Stmt *getBody() { return SubExprs[BODY]; } 583 SwitchCase *getSwitchCaseList() { return FirstCase; } 584 585 void setBody(Stmt *S, SourceLocation SL) { 586 SubExprs[BODY] = S; 587 SwitchLoc = SL; 588 } 589 void addSwitchCase(SwitchCase *SC) { 590 assert(!SC->getNextSwitchCase() && "case/default already added to a switch"); 591 SC->setNextSwitchCase(FirstCase); 592 FirstCase = SC; 593 } 594 virtual SourceRange getSourceRange() const { 595 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 596 } 597 static bool classof(const Stmt *T) { 598 return T->getStmtClass() == SwitchStmtClass; 599 } 600 static bool classof(const SwitchStmt *) { return true; } 601 602 // Iterators 603 virtual child_iterator child_begin(); 604 virtual child_iterator child_end(); 605 606 virtual void EmitImpl(llvm::Serializer& S) const; 607 static SwitchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 608}; 609 610 611/// WhileStmt - This represents a 'while' stmt. 612/// 613class WhileStmt : public Stmt { 614 enum { COND, BODY, END_EXPR }; 615 Stmt* SubExprs[END_EXPR]; 616 SourceLocation WhileLoc; 617public: 618 WhileStmt(Expr *cond, Stmt *body, SourceLocation WL) : Stmt(WhileStmtClass) { 619 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 620 SubExprs[BODY] = body; 621 WhileLoc = WL; 622 } 623 624 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 625 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 626 Stmt *getBody() { return SubExprs[BODY]; } 627 const Stmt *getBody() const { return SubExprs[BODY]; } 628 629 virtual SourceRange getSourceRange() const { 630 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 631 } 632 static bool classof(const Stmt *T) { 633 return T->getStmtClass() == WhileStmtClass; 634 } 635 static bool classof(const WhileStmt *) { return true; } 636 637 // Iterators 638 virtual child_iterator child_begin(); 639 virtual child_iterator child_end(); 640 641 virtual void EmitImpl(llvm::Serializer& S) const; 642 static WhileStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 643}; 644 645/// DoStmt - This represents a 'do/while' stmt. 646/// 647class DoStmt : public Stmt { 648 enum { COND, BODY, END_EXPR }; 649 Stmt* SubExprs[END_EXPR]; 650 SourceLocation DoLoc; 651public: 652 DoStmt(Stmt *body, Expr *cond, SourceLocation DL) 653 : Stmt(DoStmtClass), DoLoc(DL) { 654 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 655 SubExprs[BODY] = body; 656 DoLoc = DL; 657 } 658 659 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 660 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 661 Stmt *getBody() { return SubExprs[BODY]; } 662 const Stmt *getBody() const { return SubExprs[BODY]; } 663 664 virtual SourceRange getSourceRange() const { 665 return SourceRange(DoLoc, SubExprs[BODY]->getLocEnd()); 666 } 667 static bool classof(const Stmt *T) { 668 return T->getStmtClass() == DoStmtClass; 669 } 670 static bool classof(const DoStmt *) { return true; } 671 672 // Iterators 673 virtual child_iterator child_begin(); 674 virtual child_iterator child_end(); 675 676 virtual void EmitImpl(llvm::Serializer& S) const; 677 static DoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 678}; 679 680 681/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 682/// the init/cond/inc parts of the ForStmt will be null if they were not 683/// specified in the source. 684/// 685class ForStmt : public Stmt { 686 enum { INIT, COND, INC, BODY, END_EXPR }; 687 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 688 SourceLocation ForLoc; 689public: 690 ForStmt(Stmt *Init, Expr *Cond, Expr *Inc, Stmt *Body, SourceLocation FL) 691 : Stmt(ForStmtClass) { 692 SubExprs[INIT] = Init; 693 SubExprs[COND] = reinterpret_cast<Stmt*>(Cond); 694 SubExprs[INC] = reinterpret_cast<Stmt*>(Inc); 695 SubExprs[BODY] = Body; 696 ForLoc = FL; 697 } 698 699 Stmt *getInit() { return SubExprs[INIT]; } 700 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 701 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 702 Stmt *getBody() { return SubExprs[BODY]; } 703 704 const Stmt *getInit() const { return SubExprs[INIT]; } 705 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 706 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 707 const Stmt *getBody() const { return SubExprs[BODY]; } 708 709 virtual SourceRange getSourceRange() const { 710 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 711 } 712 static bool classof(const Stmt *T) { 713 return T->getStmtClass() == ForStmtClass; 714 } 715 static bool classof(const ForStmt *) { return true; } 716 717 // Iterators 718 virtual child_iterator child_begin(); 719 virtual child_iterator child_end(); 720 721 virtual void EmitImpl(llvm::Serializer& S) const; 722 static ForStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 723}; 724 725/// GotoStmt - This represents a direct goto. 726/// 727class GotoStmt : public Stmt { 728 LabelStmt *Label; 729 SourceLocation GotoLoc; 730 SourceLocation LabelLoc; 731public: 732 GotoStmt(LabelStmt *label, SourceLocation GL, SourceLocation LL) 733 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 734 735 LabelStmt *getLabel() const { return Label; } 736 737 virtual SourceRange getSourceRange() const { 738 return SourceRange(GotoLoc, LabelLoc); 739 } 740 static bool classof(const Stmt *T) { 741 return T->getStmtClass() == GotoStmtClass; 742 } 743 static bool classof(const GotoStmt *) { return true; } 744 745 // Iterators 746 virtual child_iterator child_begin(); 747 virtual child_iterator child_end(); 748 749 virtual void EmitImpl(llvm::Serializer& S) const; 750 static GotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 751}; 752 753/// IndirectGotoStmt - This represents an indirect goto. 754/// 755class IndirectGotoStmt : public Stmt { 756 Stmt *Target; 757 // FIXME: Add location information (e.g. SourceLocation objects). 758 // When doing so, update the serialization routines. 759public: 760 IndirectGotoStmt(Expr *target) : Stmt(IndirectGotoStmtClass), 761 Target((Stmt*)target){} 762 763 Expr *getTarget(); 764 const Expr *getTarget() const; 765 766 virtual SourceRange getSourceRange() const { return SourceRange(); } 767 768 static bool classof(const Stmt *T) { 769 return T->getStmtClass() == IndirectGotoStmtClass; 770 } 771 static bool classof(const IndirectGotoStmt *) { return true; } 772 773 // Iterators 774 virtual child_iterator child_begin(); 775 virtual child_iterator child_end(); 776 777 virtual void EmitImpl(llvm::Serializer& S) const; 778 static IndirectGotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 779}; 780 781 782/// ContinueStmt - This represents a continue. 783/// 784class ContinueStmt : public Stmt { 785 SourceLocation ContinueLoc; 786public: 787 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 788 789 virtual SourceRange getSourceRange() const { 790 return SourceRange(ContinueLoc); 791 } 792 static bool classof(const Stmt *T) { 793 return T->getStmtClass() == ContinueStmtClass; 794 } 795 static bool classof(const ContinueStmt *) { return true; } 796 797 // Iterators 798 virtual child_iterator child_begin(); 799 virtual child_iterator child_end(); 800 801 virtual void EmitImpl(llvm::Serializer& S) const; 802 static ContinueStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 803}; 804 805/// BreakStmt - This represents a break. 806/// 807class BreakStmt : public Stmt { 808 SourceLocation BreakLoc; 809public: 810 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 811 812 virtual SourceRange getSourceRange() const { return SourceRange(BreakLoc); } 813 814 static bool classof(const Stmt *T) { 815 return T->getStmtClass() == BreakStmtClass; 816 } 817 static bool classof(const BreakStmt *) { return true; } 818 819 // Iterators 820 virtual child_iterator child_begin(); 821 virtual child_iterator child_end(); 822 823 virtual void EmitImpl(llvm::Serializer& S) const; 824 static BreakStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 825}; 826 827 828/// ReturnStmt - This represents a return, optionally of an expression: 829/// return; 830/// return 4; 831/// 832/// Note that GCC allows return with no argument in a function declared to 833/// return a value, and it allows returning a value in functions declared to 834/// return void. We explicitly model this in the AST, which means you can't 835/// depend on the return type of the function and the presence of an argument. 836/// 837class ReturnStmt : public Stmt { 838 Stmt *RetExpr; 839 SourceLocation RetLoc; 840public: 841 ReturnStmt(SourceLocation RL, Expr *E = 0) : Stmt(ReturnStmtClass), 842 RetExpr((Stmt*) E), RetLoc(RL) {} 843 844 const Expr *getRetValue() const; 845 Expr *getRetValue(); 846 847 virtual SourceRange getSourceRange() const; 848 849 static bool classof(const Stmt *T) { 850 return T->getStmtClass() == ReturnStmtClass; 851 } 852 static bool classof(const ReturnStmt *) { return true; } 853 854 // Iterators 855 virtual child_iterator child_begin(); 856 virtual child_iterator child_end(); 857 858 virtual void EmitImpl(llvm::Serializer& S) const; 859 static ReturnStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 860}; 861 862/// AsmStmt - This represents a GNU inline-assembly statement extension. 863/// 864class AsmStmt : public Stmt { 865 SourceLocation AsmLoc, RParenLoc; 866 StringLiteral *AsmStr; 867 868 bool IsSimple; 869 bool IsVolatile; 870 871 unsigned NumOutputs; 872 unsigned NumInputs; 873 874 llvm::SmallVector<std::string, 4> Names; 875 llvm::SmallVector<StringLiteral*, 4> Constraints; 876 llvm::SmallVector<Stmt*, 4> Exprs; 877 878 llvm::SmallVector<StringLiteral*, 4> Clobbers; 879public: 880 AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile, 881 unsigned numoutputs, unsigned numinputs, 882 std::string *names, StringLiteral **constraints, 883 Expr **exprs, StringLiteral *asmstr, unsigned numclobbers, 884 StringLiteral **clobbers, SourceLocation rparenloc); 885 886 bool isVolatile() const { return IsVolatile; } 887 bool isSimple() const { return IsSimple; } 888 889 //===--- Asm String Analysis ---===// 890 891 const StringLiteral *getAsmString() const { return AsmStr; } 892 StringLiteral *getAsmString() { return AsmStr; } 893 894 /// AsmStringPiece - this is part of a decomposed asm string specification 895 /// (for use with the AnalyzeAsmString function below). An asm string is 896 /// considered to be a concatenation of these parts. 897 class AsmStringPiece { 898 public: 899 enum Kind { 900 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 901 Operand // Operand reference, with optional modifier %c4. 902 }; 903 private: 904 Kind MyKind; 905 std::string Str; 906 unsigned OperandNo; 907 public: 908 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 909 AsmStringPiece(unsigned OpNo, char Modifier) 910 : MyKind(Operand), Str(), OperandNo(OpNo) { 911 Str += Modifier; 912 } 913 914 bool isString() const { return MyKind == String; } 915 bool isOperand() const { return MyKind == Operand; } 916 917 const std::string &getString() const { 918 assert(isString()); 919 return Str; 920 } 921 922 unsigned getOperandNo() const { 923 assert(isOperand()); 924 return OperandNo; 925 } 926 927 /// getModifier - Get the modifier for this operand, if present. This 928 /// returns '\0' if there was no modifier. 929 char getModifier() const { 930 assert(isOperand()); 931 return Str[0]; 932 } 933 }; 934 935 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 936 /// it into pieces. If the asm string is erroneous, emit errors and return 937 /// true, otherwise return false. This handles canonicalization and 938 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 939 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 940 unsigned AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces, 941 ASTContext &C, unsigned &DiagOffs) const; 942 943 944 //===--- Output operands ---===// 945 946 unsigned getNumOutputs() const { return NumOutputs; } 947 948 const std::string &getOutputName(unsigned i) const { 949 return Names[i]; 950 } 951 952 /// getOutputConstraint - Return the constraint string for the specified 953 /// output operand. All output constraints are known to be non-empty (either 954 /// '=' or '+'). 955 std::string getOutputConstraint(unsigned i) const; 956 957 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 958 return Constraints[i]; 959 } 960 StringLiteral *getOutputConstraintLiteral(unsigned i) { 961 return Constraints[i]; 962 } 963 964 965 Expr *getOutputExpr(unsigned i); 966 967 const Expr *getOutputExpr(unsigned i) const { 968 return const_cast<AsmStmt*>(this)->getOutputExpr(i); 969 } 970 971 /// isOutputPlusConstraint - Return true if the specified output constraint 972 /// is a "+" constraint (which is both an input and an output) or false if it 973 /// is an "=" constraint (just an output). 974 bool isOutputPlusConstraint(unsigned i) const { 975 return getOutputConstraint(i)[0] == '+'; 976 } 977 978 /// getNumPlusOperands - Return the number of output operands that have a "+" 979 /// constraint. 980 unsigned getNumPlusOperands() const; 981 982 //===--- Input operands ---===// 983 984 unsigned getNumInputs() const { return NumInputs; } 985 986 const std::string &getInputName(unsigned i) const { 987 return Names[i + NumOutputs]; 988 } 989 990 /// getInputConstraint - Return the specified input constraint. Unlike output 991 /// constraints, these can be empty. 992 std::string getInputConstraint(unsigned i) const; 993 994 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 995 return Constraints[i + NumOutputs]; 996 } 997 StringLiteral *getInputConstraintLiteral(unsigned i) { 998 return Constraints[i + NumOutputs]; 999 } 1000 1001 1002 Expr *getInputExpr(unsigned i); 1003 1004 const Expr *getInputExpr(unsigned i) const { 1005 return const_cast<AsmStmt*>(this)->getInputExpr(i); 1006 } 1007 1008 //===--- Other ---===// 1009 1010 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1011 /// translate this into a numeric value needed to reference the same operand. 1012 /// This returns -1 if the operand name is invalid. 1013 int getNamedOperand(const std::string &SymbolicName) const; 1014 1015 1016 1017 unsigned getNumClobbers() const { return Clobbers.size(); } 1018 StringLiteral *getClobber(unsigned i) { return Clobbers[i]; } 1019 const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; } 1020 1021 virtual SourceRange getSourceRange() const { 1022 return SourceRange(AsmLoc, RParenLoc); 1023 } 1024 1025 static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;} 1026 static bool classof(const AsmStmt *) { return true; } 1027 1028 // Input expr iterators. 1029 1030 typedef ExprIterator inputs_iterator; 1031 typedef ConstExprIterator const_inputs_iterator; 1032 1033 inputs_iterator begin_inputs() { 1034 return &Exprs[0] + NumOutputs; 1035 } 1036 1037 inputs_iterator end_inputs() { 1038 return &Exprs[0] + NumOutputs + NumInputs; 1039 } 1040 1041 const_inputs_iterator begin_inputs() const { 1042 return &Exprs[0] + NumOutputs; 1043 } 1044 1045 const_inputs_iterator end_inputs() const { 1046 return &Exprs[0] + NumOutputs + NumInputs;} 1047 1048 // Output expr iterators. 1049 1050 typedef ExprIterator outputs_iterator; 1051 typedef ConstExprIterator const_outputs_iterator; 1052 1053 outputs_iterator begin_outputs() { return &Exprs[0]; } 1054 outputs_iterator end_outputs() { return &Exprs[0] + NumOutputs; } 1055 1056 const_outputs_iterator begin_outputs() const { return &Exprs[0]; } 1057 const_outputs_iterator end_outputs() const { return &Exprs[0] + NumOutputs; } 1058 1059 // Input name iterator. 1060 1061 const std::string *begin_output_names() const { 1062 return &Names[0]; 1063 } 1064 1065 const std::string *end_output_names() const { 1066 return &Names[0] + NumOutputs; 1067 } 1068 1069 // Child iterators 1070 1071 virtual child_iterator child_begin(); 1072 virtual child_iterator child_end(); 1073 1074 virtual void EmitImpl(llvm::Serializer& S) const; 1075 static AsmStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1076}; 1077 1078/// ObjCForCollectionStmt - This represents Objective-c's collection statement; 1079/// represented as 'for (element 'in' collection-expression)' stmt. 1080/// 1081class ObjCForCollectionStmt : public Stmt { 1082 enum { ELEM, COLLECTION, BODY, END_EXPR }; 1083 Stmt* SubExprs[END_EXPR]; // SubExprs[ELEM] is an expression or declstmt. 1084 SourceLocation ForLoc; 1085 SourceLocation RParenLoc; 1086public: 1087 ObjCForCollectionStmt(Stmt *Elem, Expr *Collect, Stmt *Body, 1088 SourceLocation FCL, SourceLocation RPL); 1089 1090 Stmt *getElement() { return SubExprs[ELEM]; } 1091 Expr *getCollection() { 1092 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1093 } 1094 Stmt *getBody() { return SubExprs[BODY]; } 1095 1096 const Stmt *getElement() const { return SubExprs[ELEM]; } 1097 const Expr *getCollection() const { 1098 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1099 } 1100 const Stmt *getBody() const { return SubExprs[BODY]; } 1101 1102 SourceLocation getRParenLoc() const { return RParenLoc; } 1103 1104 virtual SourceRange getSourceRange() const { 1105 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 1106 } 1107 static bool classof(const Stmt *T) { 1108 return T->getStmtClass() == ObjCForCollectionStmtClass; 1109 } 1110 static bool classof(const ObjCForCollectionStmt *) { return true; } 1111 1112 // Iterators 1113 virtual child_iterator child_begin(); 1114 virtual child_iterator child_end(); 1115 1116 virtual void EmitImpl(llvm::Serializer& S) const; 1117 static ObjCForCollectionStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1118}; 1119 1120/// ObjCAtCatchStmt - This represents objective-c's @catch statement. 1121class ObjCAtCatchStmt : public Stmt { 1122private: 1123 enum { BODY, NEXT_CATCH, END_EXPR }; 1124 ParmVarDecl *ExceptionDecl; 1125 Stmt *SubExprs[END_EXPR]; 1126 SourceLocation AtCatchLoc, RParenLoc; 1127 1128 // Used by deserialization. 1129 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc) 1130 : Stmt(ObjCAtCatchStmtClass), AtCatchLoc(atCatchLoc), RParenLoc(rparenloc) {} 1131 1132public: 1133 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc, 1134 ParmVarDecl *catchVarDecl, 1135 Stmt *atCatchStmt, Stmt *atCatchList); 1136 1137 const Stmt *getCatchBody() const { return SubExprs[BODY]; } 1138 Stmt *getCatchBody() { return SubExprs[BODY]; } 1139 1140 const ObjCAtCatchStmt *getNextCatchStmt() const { 1141 return static_cast<const ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1142 } 1143 ObjCAtCatchStmt *getNextCatchStmt() { 1144 return static_cast<ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1145 } 1146 1147 const ParmVarDecl *getCatchParamDecl() const { 1148 return ExceptionDecl; 1149 } 1150 ParmVarDecl *getCatchParamDecl() { 1151 return ExceptionDecl; 1152 } 1153 1154 SourceLocation getRParenLoc() const { return RParenLoc; } 1155 1156 virtual SourceRange getSourceRange() const { 1157 return SourceRange(AtCatchLoc, SubExprs[BODY]->getLocEnd()); 1158 } 1159 1160 bool hasEllipsis() const { return getCatchParamDecl() == 0; } 1161 1162 static bool classof(const Stmt *T) { 1163 return T->getStmtClass() == ObjCAtCatchStmtClass; 1164 } 1165 static bool classof(const ObjCAtCatchStmt *) { return true; } 1166 1167 virtual child_iterator child_begin(); 1168 virtual child_iterator child_end(); 1169 1170 virtual void EmitImpl(llvm::Serializer& S) const; 1171 static ObjCAtCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1172}; 1173 1174/// ObjCAtFinallyStmt - This represent objective-c's @finally Statement 1175class ObjCAtFinallyStmt : public Stmt { 1176 Stmt *AtFinallyStmt; 1177 SourceLocation AtFinallyLoc; 1178public: 1179 ObjCAtFinallyStmt(SourceLocation atFinallyLoc, Stmt *atFinallyStmt) 1180 : Stmt(ObjCAtFinallyStmtClass), 1181 AtFinallyStmt(atFinallyStmt), AtFinallyLoc(atFinallyLoc) {} 1182 1183 const Stmt *getFinallyBody () const { return AtFinallyStmt; } 1184 Stmt *getFinallyBody () { return AtFinallyStmt; } 1185 1186 virtual SourceRange getSourceRange() const { 1187 return SourceRange(AtFinallyLoc, AtFinallyStmt->getLocEnd()); 1188 } 1189 1190 static bool classof(const Stmt *T) { 1191 return T->getStmtClass() == ObjCAtFinallyStmtClass; 1192 } 1193 static bool classof(const ObjCAtFinallyStmt *) { return true; } 1194 1195 virtual child_iterator child_begin(); 1196 virtual child_iterator child_end(); 1197 1198 virtual void EmitImpl(llvm::Serializer& S) const; 1199 static ObjCAtFinallyStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1200}; 1201 1202/// ObjCAtTryStmt - This represent objective-c's over-all 1203/// @try ... @catch ... @finally statement. 1204class ObjCAtTryStmt : public Stmt { 1205private: 1206 enum { TRY, CATCH, FINALLY, END_EXPR }; 1207 Stmt* SubStmts[END_EXPR]; 1208 1209 SourceLocation AtTryLoc; 1210public: 1211 ObjCAtTryStmt(SourceLocation atTryLoc, Stmt *atTryStmt, 1212 Stmt *atCatchStmt, 1213 Stmt *atFinallyStmt) 1214 : Stmt(ObjCAtTryStmtClass) { 1215 SubStmts[TRY] = atTryStmt; 1216 SubStmts[CATCH] = atCatchStmt; 1217 SubStmts[FINALLY] = atFinallyStmt; 1218 AtTryLoc = atTryLoc; 1219 } 1220 1221 const Stmt *getTryBody() const { return SubStmts[TRY]; } 1222 Stmt *getTryBody() { return SubStmts[TRY]; } 1223 const ObjCAtCatchStmt *getCatchStmts() const { 1224 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1225 } 1226 ObjCAtCatchStmt *getCatchStmts() { 1227 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1228 } 1229 const ObjCAtFinallyStmt *getFinallyStmt() const { 1230 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1231 } 1232 ObjCAtFinallyStmt *getFinallyStmt() { 1233 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1234 } 1235 virtual SourceRange getSourceRange() const { 1236 return SourceRange(AtTryLoc, SubStmts[TRY]->getLocEnd()); 1237 } 1238 1239 static bool classof(const Stmt *T) { 1240 return T->getStmtClass() == ObjCAtTryStmtClass; 1241 } 1242 static bool classof(const ObjCAtTryStmt *) { return true; } 1243 1244 virtual child_iterator child_begin(); 1245 virtual child_iterator child_end(); 1246 1247 virtual void EmitImpl(llvm::Serializer& S) const; 1248 static ObjCAtTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1249}; 1250 1251/// ObjCAtSynchronizedStmt - This is for objective-c's @synchronized statement. 1252/// Example: @synchronized (sem) { 1253/// do-something; 1254/// } 1255/// 1256class ObjCAtSynchronizedStmt : public Stmt { 1257private: 1258 enum { SYNC_EXPR, SYNC_BODY, END_EXPR }; 1259 Stmt* SubStmts[END_EXPR]; 1260 SourceLocation AtSynchronizedLoc; 1261 1262public: 1263 ObjCAtSynchronizedStmt(SourceLocation atSynchronizedLoc, Stmt *synchExpr, 1264 Stmt *synchBody) 1265 : Stmt(ObjCAtSynchronizedStmtClass) { 1266 SubStmts[SYNC_EXPR] = synchExpr; 1267 SubStmts[SYNC_BODY] = synchBody; 1268 AtSynchronizedLoc = atSynchronizedLoc; 1269 } 1270 1271 const CompoundStmt *getSynchBody() const { 1272 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1273 } 1274 CompoundStmt *getSynchBody() { 1275 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1276 } 1277 1278 const Expr *getSynchExpr() const { 1279 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1280 } 1281 Expr *getSynchExpr() { 1282 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1283 } 1284 1285 virtual SourceRange getSourceRange() const { 1286 return SourceRange(AtSynchronizedLoc, getSynchBody()->getLocEnd()); 1287 } 1288 1289 static bool classof(const Stmt *T) { 1290 return T->getStmtClass() == ObjCAtSynchronizedStmtClass; 1291 } 1292 static bool classof(const ObjCAtSynchronizedStmt *) { return true; } 1293 1294 virtual child_iterator child_begin(); 1295 virtual child_iterator child_end(); 1296 1297 virtual void EmitImpl(llvm::Serializer& S) const; 1298 static ObjCAtSynchronizedStmt* CreateImpl(llvm::Deserializer& D, 1299 ASTContext& C); 1300}; 1301 1302/// ObjCAtThrowStmt - This represents objective-c's @throw statement. 1303class ObjCAtThrowStmt : public Stmt { 1304 Stmt *Throw; 1305 SourceLocation AtThrowLoc; 1306public: 1307 ObjCAtThrowStmt(SourceLocation atThrowLoc, Stmt *throwExpr) 1308 : Stmt(ObjCAtThrowStmtClass), Throw(throwExpr) { 1309 AtThrowLoc = atThrowLoc; 1310 } 1311 1312 const Expr *getThrowExpr() const { return reinterpret_cast<Expr*>(Throw); } 1313 Expr *getThrowExpr() { return reinterpret_cast<Expr*>(Throw); } 1314 1315 virtual SourceRange getSourceRange() const { 1316 if (Throw) 1317 return SourceRange(AtThrowLoc, Throw->getLocEnd()); 1318 else 1319 return SourceRange(AtThrowLoc); 1320 } 1321 1322 static bool classof(const Stmt *T) { 1323 return T->getStmtClass() == ObjCAtThrowStmtClass; 1324 } 1325 static bool classof(const ObjCAtThrowStmt *) { return true; } 1326 1327 virtual child_iterator child_begin(); 1328 virtual child_iterator child_end(); 1329 1330 virtual void EmitImpl(llvm::Serializer& S) const; 1331 static ObjCAtThrowStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1332}; 1333 1334/// CXXCatchStmt - This represents a C++ catch block. 1335class CXXCatchStmt : public Stmt { 1336 SourceLocation CatchLoc; 1337 /// The exception-declaration of the type. 1338 Decl *ExceptionDecl; 1339 /// The handler block. 1340 Stmt *HandlerBlock; 1341 1342public: 1343 CXXCatchStmt(SourceLocation catchLoc, Decl *exDecl, Stmt *handlerBlock) 1344 : Stmt(CXXCatchStmtClass), CatchLoc(catchLoc), ExceptionDecl(exDecl), 1345 HandlerBlock(handlerBlock) {} 1346 1347 virtual void Destroy(ASTContext& Ctx); 1348 1349 virtual SourceRange getSourceRange() const { 1350 return SourceRange(CatchLoc, HandlerBlock->getLocEnd()); 1351 } 1352 1353 Decl *getExceptionDecl() { return ExceptionDecl; } 1354 QualType getCaughtType(); 1355 Stmt *getHandlerBlock() { return HandlerBlock; } 1356 1357 static bool classof(const Stmt *T) { 1358 return T->getStmtClass() == CXXCatchStmtClass; 1359 } 1360 static bool classof(const CXXCatchStmt *) { return true; } 1361 1362 virtual child_iterator child_begin(); 1363 virtual child_iterator child_end(); 1364 1365 virtual void EmitImpl(llvm::Serializer& S) const; 1366 static CXXCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1367}; 1368 1369/// CXXTryStmt - A C++ try block, including all handlers. 1370class CXXTryStmt : public Stmt { 1371 SourceLocation TryLoc; 1372 // First place is the guarded CompoundStatement. Subsequent are the handlers. 1373 // More than three handlers should be rare. 1374 llvm::SmallVector<Stmt*, 4> Stmts; 1375 1376public: 1377 CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock, 1378 Stmt **handlers, unsigned numHandlers); 1379 1380 virtual SourceRange getSourceRange() const { 1381 return SourceRange(TryLoc, Stmts.back()->getLocEnd()); 1382 } 1383 1384 CompoundStmt *getTryBlock() { return llvm::cast<CompoundStmt>(Stmts[0]); } 1385 const CompoundStmt *getTryBlock() const { 1386 return llvm::cast<CompoundStmt>(Stmts[0]); 1387 } 1388 1389 unsigned getNumHandlers() const { return Stmts.size() - 1; } 1390 CXXCatchStmt *getHandler(unsigned i) { 1391 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1392 } 1393 const CXXCatchStmt *getHandler(unsigned i) const { 1394 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1395 } 1396 1397 static bool classof(const Stmt *T) { 1398 return T->getStmtClass() == CXXTryStmtClass; 1399 } 1400 static bool classof(const CXXTryStmt *) { return true; } 1401 1402 virtual child_iterator child_begin(); 1403 virtual child_iterator child_end(); 1404 1405 virtual void EmitImpl(llvm::Serializer& S) const; 1406 static CXXTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1407}; 1408 1409} // end namespace clang 1410 1411#endif 1412