Stmt.h revision 84f2170062014d268951902164bed0d8bdea0e82
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 139public: 140 /// \brief A placeholder type used to construct an empty shell of a 141 /// type, that will be filled in later (e.g., by some 142 /// de-serialization). 143 struct EmptyShell { }; 144 145protected: 146 /// DestroyChildren - Invoked by destructors of subclasses of Stmt to 147 /// recursively release child AST nodes. 148 void DestroyChildren(ASTContext& Ctx); 149 150 /// \brief Construct an empty statement. 151 explicit Stmt(StmtClass SC, EmptyShell) : sClass(SC) { 152 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 153 } 154 155public: 156 Stmt(StmtClass SC) : sClass(SC) { 157 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 158 } 159 virtual ~Stmt() {} 160 161 virtual void Destroy(ASTContext &Ctx); 162 163 StmtClass getStmtClass() const { return sClass; } 164 const char *getStmtClassName() const; 165 166 /// SourceLocation tokens are not useful in isolation - they are low level 167 /// value objects created/interpreted by SourceManager. We assume AST 168 /// clients will have a pointer to the respective SourceManager. 169 virtual SourceRange getSourceRange() const = 0; 170 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 171 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 172 173 // global temp stats (until we have a per-module visitor) 174 static void addStmtClass(const StmtClass s); 175 static bool CollectingStats(bool enable=false); 176 static void PrintStats(); 177 178 /// dump - This does a local dump of the specified AST fragment. It dumps the 179 /// specified node and a few nodes underneath it, but not the whole subtree. 180 /// This is useful in a debugger. 181 void dump() const; 182 void dump(SourceManager &SM) const; 183 184 /// dumpAll - This does a dump of the specified AST fragment and all subtrees. 185 void dumpAll() const; 186 void dumpAll(SourceManager &SM) const; 187 188 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 189 /// back to its original source language syntax. 190 void dumpPretty() const; 191 void printPretty(llvm::raw_ostream &OS, PrinterHelper* = NULL, unsigned = 0, 192 bool NoIndent=false) const; 193 194 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 195 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 196 void viewAST() const; 197 198 // Implement isa<T> support. 199 static bool classof(const Stmt *) { return true; } 200 201 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 202 /// contain implicit control-flow in the order their subexpressions 203 /// are evaluated. This predicate returns true if this statement has 204 /// such implicit control-flow. Such statements are also specially handled 205 /// within CFGs. 206 bool hasImplicitControlFlow() const; 207 208 /// Child Iterators: All subclasses must implement child_begin and child_end 209 /// to permit easy iteration over the substatements/subexpessions of an 210 /// AST node. This permits easy iteration over all nodes in the AST. 211 typedef StmtIterator child_iterator; 212 typedef ConstStmtIterator const_child_iterator; 213 214 virtual child_iterator child_begin() = 0; 215 virtual child_iterator child_end() = 0; 216 217 const_child_iterator child_begin() const { 218 return const_child_iterator(const_cast<Stmt*>(this)->child_begin()); 219 } 220 221 const_child_iterator child_end() const { 222 return const_child_iterator(const_cast<Stmt*>(this)->child_end()); 223 } 224 225 void Emit(llvm::Serializer& S) const; 226 static Stmt* Create(llvm::Deserializer& D, ASTContext& C); 227 228 virtual void EmitImpl(llvm::Serializer& S) const { 229 // This method will eventually be a pure-virtual function. 230 assert (false && "Not implemented."); 231 } 232}; 233 234/// DeclStmt - Adaptor class for mixing declarations with statements and 235/// expressions. For example, CompoundStmt mixes statements, expressions 236/// and declarations (variables, types). Another example is ForStmt, where 237/// the first statement can be an expression or a declaration. 238/// 239class DeclStmt : public Stmt { 240 DeclGroupRef DG; 241 SourceLocation StartLoc, EndLoc; 242public: 243 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 244 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 245 StartLoc(startLoc), EndLoc(endLoc) {} 246 247 /// \brief Build an empty declaration statement. 248 explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { } 249 250 virtual void Destroy(ASTContext& Ctx); 251 252 /// isSingleDecl - This method returns true if this DeclStmt refers 253 /// to a single Decl. 254 bool isSingleDecl() const { 255 return DG.isSingleDecl(); 256 } 257 258 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 259 Decl *getSingleDecl() { return DG.getSingleDecl(); } 260 261 const DeclGroupRef getDeclGroup() const { return DG; } 262 DeclGroupRef getDeclGroup() { return DG; } 263 void setDeclGroup(DeclGroupRef DGR) { DG = DGR; } 264 265 SourceLocation getStartLoc() const { return StartLoc; } 266 void setStartLoc(SourceLocation L) { StartLoc = L; } 267 SourceLocation getEndLoc() const { return EndLoc; } 268 void setEndLoc(SourceLocation L) { EndLoc = L; } 269 270 SourceRange getSourceRange() const { 271 return SourceRange(StartLoc, EndLoc); 272 } 273 274 static bool classof(const Stmt *T) { 275 return T->getStmtClass() == DeclStmtClass; 276 } 277 static bool classof(const DeclStmt *) { return true; } 278 279 // Iterators over subexpressions. 280 virtual child_iterator child_begin(); 281 virtual child_iterator child_end(); 282 283 typedef DeclGroupRef::iterator decl_iterator; 284 typedef DeclGroupRef::const_iterator const_decl_iterator; 285 286 decl_iterator decl_begin() { return DG.begin(); } 287 decl_iterator decl_end() { return DG.end(); } 288 const_decl_iterator decl_begin() const { return DG.begin(); } 289 const_decl_iterator decl_end() const { return DG.end(); } 290 291 // Serialization. 292 virtual void EmitImpl(llvm::Serializer& S) const; 293 static DeclStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 294}; 295 296/// NullStmt - This is the null statement ";": C99 6.8.3p3. 297/// 298class NullStmt : public Stmt { 299 SourceLocation SemiLoc; 300public: 301 NullStmt(SourceLocation L) : Stmt(NullStmtClass), SemiLoc(L) {} 302 303 /// \brief Build an empty null statement. 304 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty) { } 305 306 SourceLocation getSemiLoc() const { return SemiLoc; } 307 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 308 309 virtual SourceRange getSourceRange() const { return SourceRange(SemiLoc); } 310 311 static bool classof(const Stmt *T) { 312 return T->getStmtClass() == NullStmtClass; 313 } 314 static bool classof(const NullStmt *) { return true; } 315 316 // Iterators 317 virtual child_iterator child_begin(); 318 virtual child_iterator child_end(); 319 320 virtual void EmitImpl(llvm::Serializer& S) const; 321 static NullStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 322}; 323 324/// CompoundStmt - This represents a group of statements like { stmt stmt }. 325/// 326class CompoundStmt : public Stmt { 327 Stmt** Body; 328 unsigned NumStmts; 329 SourceLocation LBracLoc, RBracLoc; 330public: 331 CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned numStmts, 332 SourceLocation LB, SourceLocation RB) 333 : Stmt(CompoundStmtClass), NumStmts(numStmts), LBracLoc(LB), RBracLoc(RB) { 334 if (NumStmts == 0) { 335 Body = 0; 336 return; 337 } 338 339 Body = new (C) Stmt*[NumStmts]; 340 memcpy(Body, StmtStart, numStmts * sizeof(*Body)); 341 } 342 343 // \brief Build an empty compound statement. 344 explicit CompoundStmt(EmptyShell Empty) 345 : Stmt(CompoundStmtClass, Empty), Body(0), NumStmts(0) { } 346 347 void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts); 348 349 bool body_empty() const { return NumStmts == 0; } 350 unsigned size() const { return NumStmts; } 351 352 typedef Stmt** body_iterator; 353 body_iterator body_begin() { return Body; } 354 body_iterator body_end() { return Body + NumStmts; } 355 Stmt *body_back() { return NumStmts ? Body[NumStmts-1] : 0; } 356 357 typedef Stmt* const * const_body_iterator; 358 const_body_iterator body_begin() const { return Body; } 359 const_body_iterator body_end() const { return Body + NumStmts; } 360 const Stmt *body_back() const { return NumStmts ? Body[NumStmts-1] : 0; } 361 362 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 363 reverse_body_iterator body_rbegin() { 364 return reverse_body_iterator(body_end()); 365 } 366 reverse_body_iterator body_rend() { 367 return reverse_body_iterator(body_begin()); 368 } 369 370 typedef std::reverse_iterator<const_body_iterator> 371 const_reverse_body_iterator; 372 373 const_reverse_body_iterator body_rbegin() const { 374 return const_reverse_body_iterator(body_end()); 375 } 376 377 const_reverse_body_iterator body_rend() const { 378 return const_reverse_body_iterator(body_begin()); 379 } 380 381 virtual SourceRange getSourceRange() const { 382 return SourceRange(LBracLoc, RBracLoc); 383 } 384 385 SourceLocation getLBracLoc() const { return LBracLoc; } 386 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 387 SourceLocation getRBracLoc() const { return RBracLoc; } 388 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 389 390 static bool classof(const Stmt *T) { 391 return T->getStmtClass() == CompoundStmtClass; 392 } 393 static bool classof(const CompoundStmt *) { return true; } 394 395 // Iterators 396 virtual child_iterator child_begin(); 397 virtual child_iterator child_end(); 398 399 virtual void EmitImpl(llvm::Serializer& S) const; 400 static CompoundStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 401}; 402 403// SwitchCase is the base class for CaseStmt and DefaultStmt, 404class SwitchCase : public Stmt { 405protected: 406 // A pointer to the following CaseStmt or DefaultStmt class, 407 // used by SwitchStmt. 408 SwitchCase *NextSwitchCase; 409 410 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 411 412public: 413 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 414 415 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 416 417 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 418 419 Stmt *getSubStmt() { return v_getSubStmt(); } 420 421 virtual SourceRange getSourceRange() const { return SourceRange(); } 422 423 static bool classof(const Stmt *T) { 424 return T->getStmtClass() == CaseStmtClass || 425 T->getStmtClass() == DefaultStmtClass; 426 } 427 static bool classof(const SwitchCase *) { return true; } 428protected: 429 virtual Stmt* v_getSubStmt() = 0; 430}; 431 432class CaseStmt : public SwitchCase { 433 enum { SUBSTMT, LHS, RHS, END_EXPR }; 434 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 435 // GNU "case 1 ... 4" extension 436 SourceLocation CaseLoc; 437 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 438public: 439 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc) 440 : SwitchCase(CaseStmtClass) { 441 SubExprs[SUBSTMT] = 0; 442 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 443 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 444 CaseLoc = caseLoc; 445 } 446 447 /// \brief Build an empty switch case statement. 448 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { } 449 450 SourceLocation getCaseLoc() const { return CaseLoc; } 451 void setCaseLoc(SourceLocation L) { CaseLoc = L; } 452 453 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 454 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 455 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 456 457 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 /// \brief Build an empty default statement. 500 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 501 502 Stmt *getSubStmt() { return SubStmt; } 503 const Stmt *getSubStmt() const { return SubStmt; } 504 void setSubStmt(Stmt *S) { SubStmt = S; } 505 506 SourceLocation getDefaultLoc() const { return DefaultLoc; } 507 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 508 509 virtual SourceRange getSourceRange() const { 510 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 511 } 512 static bool classof(const Stmt *T) { 513 return T->getStmtClass() == DefaultStmtClass; 514 } 515 static bool classof(const DefaultStmt *) { return true; } 516 517 // Iterators 518 virtual child_iterator child_begin(); 519 virtual child_iterator child_end(); 520 521 virtual void EmitImpl(llvm::Serializer& S) const; 522 static DefaultStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 523}; 524 525class LabelStmt : public Stmt { 526 IdentifierInfo *Label; 527 Stmt *SubStmt; 528 SourceLocation IdentLoc; 529public: 530 LabelStmt(SourceLocation IL, IdentifierInfo *label, Stmt *substmt) 531 : Stmt(LabelStmtClass), Label(label), 532 SubStmt(substmt), IdentLoc(IL) {} 533 534 SourceLocation getIdentLoc() const { return IdentLoc; } 535 IdentifierInfo *getID() const { return Label; } 536 const char *getName() const; 537 Stmt *getSubStmt() { return SubStmt; } 538 const Stmt *getSubStmt() const { return SubStmt; } 539 540 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 541 void setSubStmt(Stmt *SS) { SubStmt = SS; } 542 543 virtual SourceRange getSourceRange() const { 544 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 545 } 546 static bool classof(const Stmt *T) { 547 return T->getStmtClass() == LabelStmtClass; 548 } 549 static bool classof(const LabelStmt *) { return true; } 550 551 // Iterators 552 virtual child_iterator child_begin(); 553 virtual child_iterator child_end(); 554 555 virtual void EmitImpl(llvm::Serializer& S) const; 556 static LabelStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 557}; 558 559 560/// IfStmt - This represents an if/then/else. 561/// 562class IfStmt : public Stmt { 563 enum { COND, THEN, ELSE, END_EXPR }; 564 Stmt* SubExprs[END_EXPR]; 565 SourceLocation IfLoc; 566public: 567 IfStmt(SourceLocation IL, Expr *cond, Stmt *then, Stmt *elsev = 0) 568 : Stmt(IfStmtClass) { 569 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 570 SubExprs[THEN] = then; 571 SubExprs[ELSE] = elsev; 572 IfLoc = IL; 573 } 574 575 /// \brief Build an empty if/then/else statement 576 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 577 578 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 579 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 580 const Stmt *getThen() const { return SubExprs[THEN]; } 581 void setThen(Stmt *S) { SubExprs[THEN] = S; } 582 const Stmt *getElse() const { return SubExprs[ELSE]; } 583 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 584 585 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 586 Stmt *getThen() { return SubExprs[THEN]; } 587 Stmt *getElse() { return SubExprs[ELSE]; } 588 589 SourceLocation getIfLoc() const { return IfLoc; } 590 void setIfLoc(SourceLocation L) { IfLoc = L; } 591 592 virtual SourceRange getSourceRange() const { 593 if (SubExprs[ELSE]) 594 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 595 else 596 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 597 } 598 599 static bool classof(const Stmt *T) { 600 return T->getStmtClass() == IfStmtClass; 601 } 602 static bool classof(const IfStmt *) { return true; } 603 604 // Iterators 605 virtual child_iterator child_begin(); 606 virtual child_iterator child_end(); 607 608 virtual void EmitImpl(llvm::Serializer& S) const; 609 static IfStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 610}; 611 612/// SwitchStmt - This represents a 'switch' stmt. 613/// 614class SwitchStmt : public Stmt { 615 enum { COND, BODY, END_EXPR }; 616 Stmt* SubExprs[END_EXPR]; 617 // This points to a linked list of case and default statements. 618 SwitchCase *FirstCase; 619 SourceLocation SwitchLoc; 620public: 621 SwitchStmt(Expr *cond) : Stmt(SwitchStmtClass), FirstCase(0) { 622 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 623 SubExprs[BODY] = NULL; 624 } 625 626 /// \brief Build a empty switch statement. 627 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 628 629 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 630 const Stmt *getBody() const { return SubExprs[BODY]; } 631 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 632 633 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 634 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 635 Stmt *getBody() { return SubExprs[BODY]; } 636 void setBody(Stmt *S) { SubExprs[BODY] = S; } 637 SwitchCase *getSwitchCaseList() { return FirstCase; } 638 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 639 640 SourceLocation getSwitchLoc() const { return SwitchLoc; } 641 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 642 643 void setBody(Stmt *S, SourceLocation SL) { 644 SubExprs[BODY] = S; 645 SwitchLoc = SL; 646 } 647 void addSwitchCase(SwitchCase *SC) { 648 assert(!SC->getNextSwitchCase() && "case/default already added to a switch"); 649 SC->setNextSwitchCase(FirstCase); 650 FirstCase = SC; 651 } 652 virtual SourceRange getSourceRange() const { 653 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 654 } 655 static bool classof(const Stmt *T) { 656 return T->getStmtClass() == SwitchStmtClass; 657 } 658 static bool classof(const SwitchStmt *) { return true; } 659 660 // Iterators 661 virtual child_iterator child_begin(); 662 virtual child_iterator child_end(); 663 664 virtual void EmitImpl(llvm::Serializer& S) const; 665 static SwitchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 666}; 667 668 669/// WhileStmt - This represents a 'while' stmt. 670/// 671class WhileStmt : public Stmt { 672 enum { COND, BODY, END_EXPR }; 673 Stmt* SubExprs[END_EXPR]; 674 SourceLocation WhileLoc; 675public: 676 WhileStmt(Expr *cond, Stmt *body, SourceLocation WL) : Stmt(WhileStmtClass) { 677 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 678 SubExprs[BODY] = body; 679 WhileLoc = WL; 680 } 681 682 /// \brief Build an empty while statement. 683 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 684 685 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 686 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 687 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 688 Stmt *getBody() { return SubExprs[BODY]; } 689 const Stmt *getBody() const { return SubExprs[BODY]; } 690 void setBody(Stmt *S) { SubExprs[BODY] = S; } 691 692 SourceLocation getWhileLoc() const { return WhileLoc; } 693 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 694 695 virtual SourceRange getSourceRange() const { 696 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 697 } 698 static bool classof(const Stmt *T) { 699 return T->getStmtClass() == WhileStmtClass; 700 } 701 static bool classof(const WhileStmt *) { return true; } 702 703 // Iterators 704 virtual child_iterator child_begin(); 705 virtual child_iterator child_end(); 706 707 virtual void EmitImpl(llvm::Serializer& S) const; 708 static WhileStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 709}; 710 711/// DoStmt - This represents a 'do/while' stmt. 712/// 713class DoStmt : public Stmt { 714 enum { COND, BODY, END_EXPR }; 715 Stmt* SubExprs[END_EXPR]; 716 SourceLocation DoLoc; 717public: 718 DoStmt(Stmt *body, Expr *cond, SourceLocation DL) 719 : Stmt(DoStmtClass), DoLoc(DL) { 720 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 721 SubExprs[BODY] = body; 722 DoLoc = DL; 723 } 724 725 /// \brief Build an empty do-while statement. 726 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 727 728 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 729 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 730 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 731 Stmt *getBody() { return SubExprs[BODY]; } 732 const Stmt *getBody() const { return SubExprs[BODY]; } 733 void setBody(Stmt *S) { SubExprs[BODY] = S; } 734 735 SourceLocation getDoLoc() const { return DoLoc; } 736 void setDoLoc(SourceLocation L) { DoLoc = L; } 737 738 virtual SourceRange getSourceRange() const { 739 return SourceRange(DoLoc, SubExprs[BODY]->getLocEnd()); 740 } 741 static bool classof(const Stmt *T) { 742 return T->getStmtClass() == DoStmtClass; 743 } 744 static bool classof(const DoStmt *) { return true; } 745 746 // Iterators 747 virtual child_iterator child_begin(); 748 virtual child_iterator child_end(); 749 750 virtual void EmitImpl(llvm::Serializer& S) const; 751 static DoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 752}; 753 754 755/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 756/// the init/cond/inc parts of the ForStmt will be null if they were not 757/// specified in the source. 758/// 759class ForStmt : public Stmt { 760 enum { INIT, COND, INC, BODY, END_EXPR }; 761 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 762 SourceLocation ForLoc; 763public: 764 ForStmt(Stmt *Init, Expr *Cond, Expr *Inc, Stmt *Body, SourceLocation FL) 765 : Stmt(ForStmtClass) { 766 SubExprs[INIT] = Init; 767 SubExprs[COND] = reinterpret_cast<Stmt*>(Cond); 768 SubExprs[INC] = reinterpret_cast<Stmt*>(Inc); 769 SubExprs[BODY] = Body; 770 ForLoc = FL; 771 } 772 773 /// \brief Build an empty for statement. 774 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 775 776 Stmt *getInit() { return SubExprs[INIT]; } 777 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 778 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 779 Stmt *getBody() { return SubExprs[BODY]; } 780 781 const Stmt *getInit() const { return SubExprs[INIT]; } 782 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 783 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 784 const Stmt *getBody() const { return SubExprs[BODY]; } 785 786 void setInit(Stmt *S) { SubExprs[INIT] = S; } 787 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 788 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 789 void setBody(Stmt *S) { SubExprs[BODY] = S; } 790 791 SourceLocation getForLoc() const { return ForLoc; } 792 void setForLoc(SourceLocation L) { ForLoc = L; } 793 794 virtual SourceRange getSourceRange() const { 795 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 796 } 797 static bool classof(const Stmt *T) { 798 return T->getStmtClass() == ForStmtClass; 799 } 800 static bool classof(const ForStmt *) { return true; } 801 802 // Iterators 803 virtual child_iterator child_begin(); 804 virtual child_iterator child_end(); 805 806 virtual void EmitImpl(llvm::Serializer& S) const; 807 static ForStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 808}; 809 810/// GotoStmt - This represents a direct goto. 811/// 812class GotoStmt : public Stmt { 813 LabelStmt *Label; 814 SourceLocation GotoLoc; 815 SourceLocation LabelLoc; 816public: 817 GotoStmt(LabelStmt *label, SourceLocation GL, SourceLocation LL) 818 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 819 820 LabelStmt *getLabel() const { return Label; } 821 822 virtual SourceRange getSourceRange() const { 823 return SourceRange(GotoLoc, LabelLoc); 824 } 825 static bool classof(const Stmt *T) { 826 return T->getStmtClass() == GotoStmtClass; 827 } 828 static bool classof(const GotoStmt *) { return true; } 829 830 // Iterators 831 virtual child_iterator child_begin(); 832 virtual child_iterator child_end(); 833 834 virtual void EmitImpl(llvm::Serializer& S) const; 835 static GotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 836}; 837 838/// IndirectGotoStmt - This represents an indirect goto. 839/// 840class IndirectGotoStmt : public Stmt { 841 Stmt *Target; 842 // FIXME: Add location information (e.g. SourceLocation objects). 843 // When doing so, update the serialization routines. 844public: 845 IndirectGotoStmt(Expr *target) : Stmt(IndirectGotoStmtClass), 846 Target((Stmt*)target){} 847 848 Expr *getTarget(); 849 const Expr *getTarget() const; 850 851 virtual SourceRange getSourceRange() const { return SourceRange(); } 852 853 static bool classof(const Stmt *T) { 854 return T->getStmtClass() == IndirectGotoStmtClass; 855 } 856 static bool classof(const IndirectGotoStmt *) { return true; } 857 858 // Iterators 859 virtual child_iterator child_begin(); 860 virtual child_iterator child_end(); 861 862 virtual void EmitImpl(llvm::Serializer& S) const; 863 static IndirectGotoStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 864}; 865 866 867/// ContinueStmt - This represents a continue. 868/// 869class ContinueStmt : public Stmt { 870 SourceLocation ContinueLoc; 871public: 872 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 873 874 /// \brief Build an empty continue statement. 875 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 876 877 SourceLocation getContinueLoc() const { return ContinueLoc; } 878 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 879 880 virtual SourceRange getSourceRange() const { 881 return SourceRange(ContinueLoc); 882 } 883 static bool classof(const Stmt *T) { 884 return T->getStmtClass() == ContinueStmtClass; 885 } 886 static bool classof(const ContinueStmt *) { return true; } 887 888 // Iterators 889 virtual child_iterator child_begin(); 890 virtual child_iterator child_end(); 891 892 virtual void EmitImpl(llvm::Serializer& S) const; 893 static ContinueStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 894}; 895 896/// BreakStmt - This represents a break. 897/// 898class BreakStmt : public Stmt { 899 SourceLocation BreakLoc; 900public: 901 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 902 903 /// \brief Build an empty break statement. 904 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 905 906 SourceLocation getBreakLoc() const { return BreakLoc; } 907 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 908 909 virtual SourceRange getSourceRange() const { return SourceRange(BreakLoc); } 910 911 static bool classof(const Stmt *T) { 912 return T->getStmtClass() == BreakStmtClass; 913 } 914 static bool classof(const BreakStmt *) { return true; } 915 916 // Iterators 917 virtual child_iterator child_begin(); 918 virtual child_iterator child_end(); 919 920 virtual void EmitImpl(llvm::Serializer& S) const; 921 static BreakStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 922}; 923 924 925/// ReturnStmt - This represents a return, optionally of an expression: 926/// return; 927/// return 4; 928/// 929/// Note that GCC allows return with no argument in a function declared to 930/// return a value, and it allows returning a value in functions declared to 931/// return void. We explicitly model this in the AST, which means you can't 932/// depend on the return type of the function and the presence of an argument. 933/// 934class ReturnStmt : public Stmt { 935 Stmt *RetExpr; 936 SourceLocation RetLoc; 937public: 938 ReturnStmt(SourceLocation RL, Expr *E = 0) : Stmt(ReturnStmtClass), 939 RetExpr((Stmt*) E), RetLoc(RL) {} 940 941 /// \brief Build an empty return expression. 942 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 943 944 const Expr *getRetValue() const; 945 Expr *getRetValue(); 946 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 947 948 SourceLocation getReturnLoc() const { return RetLoc; } 949 void setReturnLoc(SourceLocation L) { RetLoc = L; } 950 951 virtual SourceRange getSourceRange() const; 952 953 static bool classof(const Stmt *T) { 954 return T->getStmtClass() == ReturnStmtClass; 955 } 956 static bool classof(const ReturnStmt *) { return true; } 957 958 // Iterators 959 virtual child_iterator child_begin(); 960 virtual child_iterator child_end(); 961 962 virtual void EmitImpl(llvm::Serializer& S) const; 963 static ReturnStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 964}; 965 966/// AsmStmt - This represents a GNU inline-assembly statement extension. 967/// 968class AsmStmt : public Stmt { 969 SourceLocation AsmLoc, RParenLoc; 970 StringLiteral *AsmStr; 971 972 bool IsSimple; 973 bool IsVolatile; 974 975 unsigned NumOutputs; 976 unsigned NumInputs; 977 978 llvm::SmallVector<std::string, 4> Names; 979 llvm::SmallVector<StringLiteral*, 4> Constraints; 980 llvm::SmallVector<Stmt*, 4> Exprs; 981 982 llvm::SmallVector<StringLiteral*, 4> Clobbers; 983public: 984 AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile, 985 unsigned numoutputs, unsigned numinputs, 986 std::string *names, StringLiteral **constraints, 987 Expr **exprs, StringLiteral *asmstr, unsigned numclobbers, 988 StringLiteral **clobbers, SourceLocation rparenloc); 989 990 bool isVolatile() const { return IsVolatile; } 991 bool isSimple() const { return IsSimple; } 992 993 //===--- Asm String Analysis ---===// 994 995 const StringLiteral *getAsmString() const { return AsmStr; } 996 StringLiteral *getAsmString() { return AsmStr; } 997 998 /// AsmStringPiece - this is part of a decomposed asm string specification 999 /// (for use with the AnalyzeAsmString function below). An asm string is 1000 /// considered to be a concatenation of these parts. 1001 class AsmStringPiece { 1002 public: 1003 enum Kind { 1004 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1005 Operand // Operand reference, with optional modifier %c4. 1006 }; 1007 private: 1008 Kind MyKind; 1009 std::string Str; 1010 unsigned OperandNo; 1011 public: 1012 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1013 AsmStringPiece(unsigned OpNo, char Modifier) 1014 : MyKind(Operand), Str(), OperandNo(OpNo) { 1015 Str += Modifier; 1016 } 1017 1018 bool isString() const { return MyKind == String; } 1019 bool isOperand() const { return MyKind == Operand; } 1020 1021 const std::string &getString() const { 1022 assert(isString()); 1023 return Str; 1024 } 1025 1026 unsigned getOperandNo() const { 1027 assert(isOperand()); 1028 return OperandNo; 1029 } 1030 1031 /// getModifier - Get the modifier for this operand, if present. This 1032 /// returns '\0' if there was no modifier. 1033 char getModifier() const { 1034 assert(isOperand()); 1035 return Str[0]; 1036 } 1037 }; 1038 1039 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1040 /// it into pieces. If the asm string is erroneous, emit errors and return 1041 /// true, otherwise return false. This handles canonicalization and 1042 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1043 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1044 unsigned AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces, 1045 ASTContext &C, unsigned &DiagOffs) const; 1046 1047 1048 //===--- Output operands ---===// 1049 1050 unsigned getNumOutputs() const { return NumOutputs; } 1051 1052 const std::string &getOutputName(unsigned i) const { 1053 return Names[i]; 1054 } 1055 1056 /// getOutputConstraint - Return the constraint string for the specified 1057 /// output operand. All output constraints are known to be non-empty (either 1058 /// '=' or '+'). 1059 std::string getOutputConstraint(unsigned i) const; 1060 1061 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1062 return Constraints[i]; 1063 } 1064 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1065 return Constraints[i]; 1066 } 1067 1068 1069 Expr *getOutputExpr(unsigned i); 1070 1071 const Expr *getOutputExpr(unsigned i) const { 1072 return const_cast<AsmStmt*>(this)->getOutputExpr(i); 1073 } 1074 1075 /// isOutputPlusConstraint - Return true if the specified output constraint 1076 /// is a "+" constraint (which is both an input and an output) or false if it 1077 /// is an "=" constraint (just an output). 1078 bool isOutputPlusConstraint(unsigned i) const { 1079 return getOutputConstraint(i)[0] == '+'; 1080 } 1081 1082 /// getNumPlusOperands - Return the number of output operands that have a "+" 1083 /// constraint. 1084 unsigned getNumPlusOperands() const; 1085 1086 //===--- Input operands ---===// 1087 1088 unsigned getNumInputs() const { return NumInputs; } 1089 1090 const std::string &getInputName(unsigned i) const { 1091 return Names[i + NumOutputs]; 1092 } 1093 1094 /// getInputConstraint - Return the specified input constraint. Unlike output 1095 /// constraints, these can be empty. 1096 std::string getInputConstraint(unsigned i) const; 1097 1098 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1099 return Constraints[i + NumOutputs]; 1100 } 1101 StringLiteral *getInputConstraintLiteral(unsigned i) { 1102 return Constraints[i + NumOutputs]; 1103 } 1104 1105 1106 Expr *getInputExpr(unsigned i); 1107 1108 const Expr *getInputExpr(unsigned i) const { 1109 return const_cast<AsmStmt*>(this)->getInputExpr(i); 1110 } 1111 1112 //===--- Other ---===// 1113 1114 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1115 /// translate this into a numeric value needed to reference the same operand. 1116 /// This returns -1 if the operand name is invalid. 1117 int getNamedOperand(const std::string &SymbolicName) const; 1118 1119 1120 1121 unsigned getNumClobbers() const { return Clobbers.size(); } 1122 StringLiteral *getClobber(unsigned i) { return Clobbers[i]; } 1123 const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; } 1124 1125 virtual SourceRange getSourceRange() const { 1126 return SourceRange(AsmLoc, RParenLoc); 1127 } 1128 1129 static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;} 1130 static bool classof(const AsmStmt *) { return true; } 1131 1132 // Input expr iterators. 1133 1134 typedef ExprIterator inputs_iterator; 1135 typedef ConstExprIterator const_inputs_iterator; 1136 1137 inputs_iterator begin_inputs() { 1138 return &Exprs[0] + NumOutputs; 1139 } 1140 1141 inputs_iterator end_inputs() { 1142 return &Exprs[0] + NumOutputs + NumInputs; 1143 } 1144 1145 const_inputs_iterator begin_inputs() const { 1146 return &Exprs[0] + NumOutputs; 1147 } 1148 1149 const_inputs_iterator end_inputs() const { 1150 return &Exprs[0] + NumOutputs + NumInputs;} 1151 1152 // Output expr iterators. 1153 1154 typedef ExprIterator outputs_iterator; 1155 typedef ConstExprIterator const_outputs_iterator; 1156 1157 outputs_iterator begin_outputs() { return &Exprs[0]; } 1158 outputs_iterator end_outputs() { return &Exprs[0] + NumOutputs; } 1159 1160 const_outputs_iterator begin_outputs() const { return &Exprs[0]; } 1161 const_outputs_iterator end_outputs() const { return &Exprs[0] + NumOutputs; } 1162 1163 // Input name iterator. 1164 1165 const std::string *begin_output_names() const { 1166 return &Names[0]; 1167 } 1168 1169 const std::string *end_output_names() const { 1170 return &Names[0] + NumOutputs; 1171 } 1172 1173 // Child iterators 1174 1175 virtual child_iterator child_begin(); 1176 virtual child_iterator child_end(); 1177 1178 virtual void EmitImpl(llvm::Serializer& S) const; 1179 static AsmStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1180}; 1181 1182/// ObjCForCollectionStmt - This represents Objective-c's collection statement; 1183/// represented as 'for (element 'in' collection-expression)' stmt. 1184/// 1185class ObjCForCollectionStmt : public Stmt { 1186 enum { ELEM, COLLECTION, BODY, END_EXPR }; 1187 Stmt* SubExprs[END_EXPR]; // SubExprs[ELEM] is an expression or declstmt. 1188 SourceLocation ForLoc; 1189 SourceLocation RParenLoc; 1190public: 1191 ObjCForCollectionStmt(Stmt *Elem, Expr *Collect, Stmt *Body, 1192 SourceLocation FCL, SourceLocation RPL); 1193 1194 Stmt *getElement() { return SubExprs[ELEM]; } 1195 Expr *getCollection() { 1196 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1197 } 1198 Stmt *getBody() { return SubExprs[BODY]; } 1199 1200 const Stmt *getElement() const { return SubExprs[ELEM]; } 1201 const Expr *getCollection() const { 1202 return reinterpret_cast<Expr*>(SubExprs[COLLECTION]); 1203 } 1204 const Stmt *getBody() const { return SubExprs[BODY]; } 1205 1206 SourceLocation getRParenLoc() const { return RParenLoc; } 1207 1208 virtual SourceRange getSourceRange() const { 1209 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 1210 } 1211 static bool classof(const Stmt *T) { 1212 return T->getStmtClass() == ObjCForCollectionStmtClass; 1213 } 1214 static bool classof(const ObjCForCollectionStmt *) { return true; } 1215 1216 // Iterators 1217 virtual child_iterator child_begin(); 1218 virtual child_iterator child_end(); 1219 1220 virtual void EmitImpl(llvm::Serializer& S) const; 1221 static ObjCForCollectionStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1222}; 1223 1224/// ObjCAtCatchStmt - This represents objective-c's @catch statement. 1225class ObjCAtCatchStmt : public Stmt { 1226private: 1227 enum { BODY, NEXT_CATCH, END_EXPR }; 1228 ParmVarDecl *ExceptionDecl; 1229 Stmt *SubExprs[END_EXPR]; 1230 SourceLocation AtCatchLoc, RParenLoc; 1231 1232 // Used by deserialization. 1233 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc) 1234 : Stmt(ObjCAtCatchStmtClass), AtCatchLoc(atCatchLoc), RParenLoc(rparenloc) {} 1235 1236public: 1237 ObjCAtCatchStmt(SourceLocation atCatchLoc, SourceLocation rparenloc, 1238 ParmVarDecl *catchVarDecl, 1239 Stmt *atCatchStmt, Stmt *atCatchList); 1240 1241 const Stmt *getCatchBody() const { return SubExprs[BODY]; } 1242 Stmt *getCatchBody() { return SubExprs[BODY]; } 1243 1244 const ObjCAtCatchStmt *getNextCatchStmt() const { 1245 return static_cast<const ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1246 } 1247 ObjCAtCatchStmt *getNextCatchStmt() { 1248 return static_cast<ObjCAtCatchStmt*>(SubExprs[NEXT_CATCH]); 1249 } 1250 1251 const ParmVarDecl *getCatchParamDecl() const { 1252 return ExceptionDecl; 1253 } 1254 ParmVarDecl *getCatchParamDecl() { 1255 return ExceptionDecl; 1256 } 1257 1258 SourceLocation getRParenLoc() const { return RParenLoc; } 1259 1260 virtual SourceRange getSourceRange() const { 1261 return SourceRange(AtCatchLoc, SubExprs[BODY]->getLocEnd()); 1262 } 1263 1264 bool hasEllipsis() const { return getCatchParamDecl() == 0; } 1265 1266 static bool classof(const Stmt *T) { 1267 return T->getStmtClass() == ObjCAtCatchStmtClass; 1268 } 1269 static bool classof(const ObjCAtCatchStmt *) { return true; } 1270 1271 virtual child_iterator child_begin(); 1272 virtual child_iterator child_end(); 1273 1274 virtual void EmitImpl(llvm::Serializer& S) const; 1275 static ObjCAtCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1276}; 1277 1278/// ObjCAtFinallyStmt - This represent objective-c's @finally Statement 1279class ObjCAtFinallyStmt : public Stmt { 1280 Stmt *AtFinallyStmt; 1281 SourceLocation AtFinallyLoc; 1282public: 1283 ObjCAtFinallyStmt(SourceLocation atFinallyLoc, Stmt *atFinallyStmt) 1284 : Stmt(ObjCAtFinallyStmtClass), 1285 AtFinallyStmt(atFinallyStmt), AtFinallyLoc(atFinallyLoc) {} 1286 1287 const Stmt *getFinallyBody () const { return AtFinallyStmt; } 1288 Stmt *getFinallyBody () { return AtFinallyStmt; } 1289 1290 virtual SourceRange getSourceRange() const { 1291 return SourceRange(AtFinallyLoc, AtFinallyStmt->getLocEnd()); 1292 } 1293 1294 static bool classof(const Stmt *T) { 1295 return T->getStmtClass() == ObjCAtFinallyStmtClass; 1296 } 1297 static bool classof(const ObjCAtFinallyStmt *) { return true; } 1298 1299 virtual child_iterator child_begin(); 1300 virtual child_iterator child_end(); 1301 1302 virtual void EmitImpl(llvm::Serializer& S) const; 1303 static ObjCAtFinallyStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1304}; 1305 1306/// ObjCAtTryStmt - This represent objective-c's over-all 1307/// @try ... @catch ... @finally statement. 1308class ObjCAtTryStmt : public Stmt { 1309private: 1310 enum { TRY, CATCH, FINALLY, END_EXPR }; 1311 Stmt* SubStmts[END_EXPR]; 1312 1313 SourceLocation AtTryLoc; 1314public: 1315 ObjCAtTryStmt(SourceLocation atTryLoc, Stmt *atTryStmt, 1316 Stmt *atCatchStmt, 1317 Stmt *atFinallyStmt) 1318 : Stmt(ObjCAtTryStmtClass) { 1319 SubStmts[TRY] = atTryStmt; 1320 SubStmts[CATCH] = atCatchStmt; 1321 SubStmts[FINALLY] = atFinallyStmt; 1322 AtTryLoc = atTryLoc; 1323 } 1324 1325 const Stmt *getTryBody() const { return SubStmts[TRY]; } 1326 Stmt *getTryBody() { return SubStmts[TRY]; } 1327 const ObjCAtCatchStmt *getCatchStmts() const { 1328 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1329 } 1330 ObjCAtCatchStmt *getCatchStmts() { 1331 return dyn_cast_or_null<ObjCAtCatchStmt>(SubStmts[CATCH]); 1332 } 1333 const ObjCAtFinallyStmt *getFinallyStmt() const { 1334 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1335 } 1336 ObjCAtFinallyStmt *getFinallyStmt() { 1337 return dyn_cast_or_null<ObjCAtFinallyStmt>(SubStmts[FINALLY]); 1338 } 1339 virtual SourceRange getSourceRange() const { 1340 return SourceRange(AtTryLoc, SubStmts[TRY]->getLocEnd()); 1341 } 1342 1343 static bool classof(const Stmt *T) { 1344 return T->getStmtClass() == ObjCAtTryStmtClass; 1345 } 1346 static bool classof(const ObjCAtTryStmt *) { return true; } 1347 1348 virtual child_iterator child_begin(); 1349 virtual child_iterator child_end(); 1350 1351 virtual void EmitImpl(llvm::Serializer& S) const; 1352 static ObjCAtTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1353}; 1354 1355/// ObjCAtSynchronizedStmt - This is for objective-c's @synchronized statement. 1356/// Example: @synchronized (sem) { 1357/// do-something; 1358/// } 1359/// 1360class ObjCAtSynchronizedStmt : public Stmt { 1361private: 1362 enum { SYNC_EXPR, SYNC_BODY, END_EXPR }; 1363 Stmt* SubStmts[END_EXPR]; 1364 SourceLocation AtSynchronizedLoc; 1365 1366public: 1367 ObjCAtSynchronizedStmt(SourceLocation atSynchronizedLoc, Stmt *synchExpr, 1368 Stmt *synchBody) 1369 : Stmt(ObjCAtSynchronizedStmtClass) { 1370 SubStmts[SYNC_EXPR] = synchExpr; 1371 SubStmts[SYNC_BODY] = synchBody; 1372 AtSynchronizedLoc = atSynchronizedLoc; 1373 } 1374 1375 const CompoundStmt *getSynchBody() const { 1376 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1377 } 1378 CompoundStmt *getSynchBody() { 1379 return reinterpret_cast<CompoundStmt*>(SubStmts[SYNC_BODY]); 1380 } 1381 1382 const Expr *getSynchExpr() const { 1383 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1384 } 1385 Expr *getSynchExpr() { 1386 return reinterpret_cast<Expr*>(SubStmts[SYNC_EXPR]); 1387 } 1388 1389 virtual SourceRange getSourceRange() const { 1390 return SourceRange(AtSynchronizedLoc, getSynchBody()->getLocEnd()); 1391 } 1392 1393 static bool classof(const Stmt *T) { 1394 return T->getStmtClass() == ObjCAtSynchronizedStmtClass; 1395 } 1396 static bool classof(const ObjCAtSynchronizedStmt *) { return true; } 1397 1398 virtual child_iterator child_begin(); 1399 virtual child_iterator child_end(); 1400 1401 virtual void EmitImpl(llvm::Serializer& S) const; 1402 static ObjCAtSynchronizedStmt* CreateImpl(llvm::Deserializer& D, 1403 ASTContext& C); 1404}; 1405 1406/// ObjCAtThrowStmt - This represents objective-c's @throw statement. 1407class ObjCAtThrowStmt : public Stmt { 1408 Stmt *Throw; 1409 SourceLocation AtThrowLoc; 1410public: 1411 ObjCAtThrowStmt(SourceLocation atThrowLoc, Stmt *throwExpr) 1412 : Stmt(ObjCAtThrowStmtClass), Throw(throwExpr) { 1413 AtThrowLoc = atThrowLoc; 1414 } 1415 1416 const Expr *getThrowExpr() const { return reinterpret_cast<Expr*>(Throw); } 1417 Expr *getThrowExpr() { return reinterpret_cast<Expr*>(Throw); } 1418 1419 virtual SourceRange getSourceRange() const { 1420 if (Throw) 1421 return SourceRange(AtThrowLoc, Throw->getLocEnd()); 1422 else 1423 return SourceRange(AtThrowLoc); 1424 } 1425 1426 static bool classof(const Stmt *T) { 1427 return T->getStmtClass() == ObjCAtThrowStmtClass; 1428 } 1429 static bool classof(const ObjCAtThrowStmt *) { return true; } 1430 1431 virtual child_iterator child_begin(); 1432 virtual child_iterator child_end(); 1433 1434 virtual void EmitImpl(llvm::Serializer& S) const; 1435 static ObjCAtThrowStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1436}; 1437 1438/// CXXCatchStmt - This represents a C++ catch block. 1439class CXXCatchStmt : public Stmt { 1440 SourceLocation CatchLoc; 1441 /// The exception-declaration of the type. 1442 Decl *ExceptionDecl; 1443 /// The handler block. 1444 Stmt *HandlerBlock; 1445 1446public: 1447 CXXCatchStmt(SourceLocation catchLoc, Decl *exDecl, Stmt *handlerBlock) 1448 : Stmt(CXXCatchStmtClass), CatchLoc(catchLoc), ExceptionDecl(exDecl), 1449 HandlerBlock(handlerBlock) {} 1450 1451 virtual void Destroy(ASTContext& Ctx); 1452 1453 virtual SourceRange getSourceRange() const { 1454 return SourceRange(CatchLoc, HandlerBlock->getLocEnd()); 1455 } 1456 1457 Decl *getExceptionDecl() { return ExceptionDecl; } 1458 QualType getCaughtType(); 1459 Stmt *getHandlerBlock() { return HandlerBlock; } 1460 1461 static bool classof(const Stmt *T) { 1462 return T->getStmtClass() == CXXCatchStmtClass; 1463 } 1464 static bool classof(const CXXCatchStmt *) { return true; } 1465 1466 virtual child_iterator child_begin(); 1467 virtual child_iterator child_end(); 1468 1469 virtual void EmitImpl(llvm::Serializer& S) const; 1470 static CXXCatchStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1471}; 1472 1473/// CXXTryStmt - A C++ try block, including all handlers. 1474class CXXTryStmt : public Stmt { 1475 SourceLocation TryLoc; 1476 // First place is the guarded CompoundStatement. Subsequent are the handlers. 1477 // More than three handlers should be rare. 1478 llvm::SmallVector<Stmt*, 4> Stmts; 1479 1480public: 1481 CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock, 1482 Stmt **handlers, unsigned numHandlers); 1483 1484 virtual SourceRange getSourceRange() const { 1485 return SourceRange(TryLoc, Stmts.back()->getLocEnd()); 1486 } 1487 1488 CompoundStmt *getTryBlock() { return llvm::cast<CompoundStmt>(Stmts[0]); } 1489 const CompoundStmt *getTryBlock() const { 1490 return llvm::cast<CompoundStmt>(Stmts[0]); 1491 } 1492 1493 unsigned getNumHandlers() const { return Stmts.size() - 1; } 1494 CXXCatchStmt *getHandler(unsigned i) { 1495 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1496 } 1497 const CXXCatchStmt *getHandler(unsigned i) const { 1498 return llvm::cast<CXXCatchStmt>(Stmts[i + 1]); 1499 } 1500 1501 static bool classof(const Stmt *T) { 1502 return T->getStmtClass() == CXXTryStmtClass; 1503 } 1504 static bool classof(const CXXTryStmt *) { return true; } 1505 1506 virtual child_iterator child_begin(); 1507 virtual child_iterator child_end(); 1508 1509 virtual void EmitImpl(llvm::Serializer& S) const; 1510 static CXXTryStmt* CreateImpl(llvm::Deserializer& D, ASTContext& C); 1511}; 1512 1513} // end namespace clang 1514 1515#endif 1516