Stmt.h revision 2fa67efeaf66a9332c30a026dc1c21bef6c33a6c
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 "clang/AST/DeclGroup.h" 18#include "clang/AST/PrettyPrinter.h" 19#include "clang/AST/StmtIterator.h" 20#include "clang/Basic/IdentifierTable.h" 21#include "clang/Basic/LLVM.h" 22#include "clang/Basic/SourceLocation.h" 23#include "clang/Lex/Token.h" 24#include "llvm/ADT/ArrayRef.h" 25#include "llvm/ADT/SmallVector.h" 26#include "llvm/Support/Compiler.h" 27#include "llvm/Support/raw_ostream.h" 28#include <string> 29 30namespace llvm { 31 class FoldingSetNodeID; 32} 33 34namespace clang { 35 class ASTContext; 36 class Attr; 37 class Decl; 38 class Expr; 39 class IdentifierInfo; 40 class LabelDecl; 41 class ParmVarDecl; 42 class QualType; 43 class SourceManager; 44 class StringLiteral; 45 class SwitchStmt; 46 class VarDecl; 47 48 //===--------------------------------------------------------------------===// 49 // ExprIterator - Iterators for iterating over Stmt* arrays that contain 50 // only Expr*. This is needed because AST nodes use Stmt* arrays to store 51 // references to children (to be compatible with StmtIterator). 52 //===--------------------------------------------------------------------===// 53 54 class Stmt; 55 class Expr; 56 57 class ExprIterator { 58 Stmt** I; 59 public: 60 ExprIterator(Stmt** i) : I(i) {} 61 ExprIterator() : I(0) {} 62 ExprIterator& operator++() { ++I; return *this; } 63 ExprIterator operator-(size_t i) { return I-i; } 64 ExprIterator operator+(size_t i) { return I+i; } 65 Expr* operator[](size_t idx); 66 // FIXME: Verify that this will correctly return a signed distance. 67 signed operator-(const ExprIterator& R) const { return I - R.I; } 68 Expr* operator*() const; 69 Expr* operator->() const; 70 bool operator==(const ExprIterator& R) const { return I == R.I; } 71 bool operator!=(const ExprIterator& R) const { return I != R.I; } 72 bool operator>(const ExprIterator& R) const { return I > R.I; } 73 bool operator>=(const ExprIterator& R) const { return I >= R.I; } 74 }; 75 76 class ConstExprIterator { 77 const Stmt * const *I; 78 public: 79 ConstExprIterator(const Stmt * const *i) : I(i) {} 80 ConstExprIterator() : I(0) {} 81 ConstExprIterator& operator++() { ++I; return *this; } 82 ConstExprIterator operator+(size_t i) const { return I+i; } 83 ConstExprIterator operator-(size_t i) const { return I-i; } 84 const Expr * operator[](size_t idx) const; 85 signed operator-(const ConstExprIterator& R) const { return I - R.I; } 86 const Expr * operator*() const; 87 const Expr * operator->() const; 88 bool operator==(const ConstExprIterator& R) const { return I == R.I; } 89 bool operator!=(const ConstExprIterator& R) const { return I != R.I; } 90 bool operator>(const ConstExprIterator& R) const { return I > R.I; } 91 bool operator>=(const ConstExprIterator& R) const { return I >= R.I; } 92 }; 93 94//===----------------------------------------------------------------------===// 95// AST classes for statements. 96//===----------------------------------------------------------------------===// 97 98/// Stmt - This represents one statement. 99/// 100class Stmt { 101public: 102 enum StmtClass { 103 NoStmtClass = 0, 104#define STMT(CLASS, PARENT) CLASS##Class, 105#define STMT_RANGE(BASE, FIRST, LAST) \ 106 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class, 107#define LAST_STMT_RANGE(BASE, FIRST, LAST) \ 108 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class 109#define ABSTRACT_STMT(STMT) 110#include "clang/AST/StmtNodes.inc" 111 }; 112 113 // Make vanilla 'new' and 'delete' illegal for Stmts. 114protected: 115 void* operator new(size_t bytes) throw() { 116 llvm_unreachable("Stmts cannot be allocated with regular 'new'."); 117 } 118 void operator delete(void* data) throw() { 119 llvm_unreachable("Stmts cannot be released with regular 'delete'."); 120 } 121 122 class StmtBitfields { 123 friend class Stmt; 124 125 /// \brief The statement class. 126 unsigned sClass : 8; 127 }; 128 enum { NumStmtBits = 8 }; 129 130 class CompoundStmtBitfields { 131 friend class CompoundStmt; 132 unsigned : NumStmtBits; 133 134 unsigned NumStmts : 32 - NumStmtBits; 135 }; 136 137 class ExprBitfields { 138 friend class Expr; 139 friend class DeclRefExpr; // computeDependence 140 friend class InitListExpr; // ctor 141 friend class DesignatedInitExpr; // ctor 142 friend class BlockDeclRefExpr; // ctor 143 friend class ASTStmtReader; // deserialization 144 friend class CXXNewExpr; // ctor 145 friend class DependentScopeDeclRefExpr; // ctor 146 friend class CXXConstructExpr; // ctor 147 friend class CallExpr; // ctor 148 friend class OffsetOfExpr; // ctor 149 friend class ObjCMessageExpr; // ctor 150 friend class ObjCArrayLiteral; // ctor 151 friend class ObjCDictionaryLiteral; // ctor 152 friend class ShuffleVectorExpr; // ctor 153 friend class ParenListExpr; // ctor 154 friend class CXXUnresolvedConstructExpr; // ctor 155 friend class CXXDependentScopeMemberExpr; // ctor 156 friend class OverloadExpr; // ctor 157 friend class PseudoObjectExpr; // ctor 158 friend class AtomicExpr; // ctor 159 unsigned : NumStmtBits; 160 161 unsigned ValueKind : 2; 162 unsigned ObjectKind : 2; 163 unsigned TypeDependent : 1; 164 unsigned ValueDependent : 1; 165 unsigned InstantiationDependent : 1; 166 unsigned ContainsUnexpandedParameterPack : 1; 167 }; 168 enum { NumExprBits = 16 }; 169 170 class CharacterLiteralBitfields { 171 friend class CharacterLiteral; 172 unsigned : NumExprBits; 173 174 unsigned Kind : 2; 175 }; 176 177 class FloatingLiteralBitfields { 178 friend class FloatingLiteral; 179 unsigned : NumExprBits; 180 181 unsigned IsIEEE : 1; // Distinguishes between PPC128 and IEEE128. 182 unsigned IsExact : 1; 183 }; 184 185 class UnaryExprOrTypeTraitExprBitfields { 186 friend class UnaryExprOrTypeTraitExpr; 187 unsigned : NumExprBits; 188 189 unsigned Kind : 2; 190 unsigned IsType : 1; // true if operand is a type, false if an expression. 191 }; 192 193 class DeclRefExprBitfields { 194 friend class DeclRefExpr; 195 friend class ASTStmtReader; // deserialization 196 unsigned : NumExprBits; 197 198 unsigned HasQualifier : 1; 199 unsigned HasTemplateKWAndArgsInfo : 1; 200 unsigned HasFoundDecl : 1; 201 unsigned HadMultipleCandidates : 1; 202 unsigned RefersToEnclosingLocal : 1; 203 }; 204 205 class CastExprBitfields { 206 friend class CastExpr; 207 unsigned : NumExprBits; 208 209 unsigned Kind : 6; 210 unsigned BasePathSize : 32 - 6 - NumExprBits; 211 }; 212 213 class CallExprBitfields { 214 friend class CallExpr; 215 unsigned : NumExprBits; 216 217 unsigned NumPreArgs : 1; 218 }; 219 220 class ExprWithCleanupsBitfields { 221 friend class ExprWithCleanups; 222 friend class ASTStmtReader; // deserialization 223 224 unsigned : NumExprBits; 225 226 unsigned NumObjects : 32 - NumExprBits; 227 }; 228 229 class PseudoObjectExprBitfields { 230 friend class PseudoObjectExpr; 231 friend class ASTStmtReader; // deserialization 232 233 unsigned : NumExprBits; 234 235 // These don't need to be particularly wide, because they're 236 // strictly limited by the forms of expressions we permit. 237 unsigned NumSubExprs : 8; 238 unsigned ResultIndex : 32 - 8 - NumExprBits; 239 }; 240 241 class ObjCIndirectCopyRestoreExprBitfields { 242 friend class ObjCIndirectCopyRestoreExpr; 243 unsigned : NumExprBits; 244 245 unsigned ShouldCopy : 1; 246 }; 247 248 class InitListExprBitfields { 249 friend class InitListExpr; 250 251 unsigned : NumExprBits; 252 253 /// Whether this initializer list originally had a GNU array-range 254 /// designator in it. This is a temporary marker used by CodeGen. 255 unsigned HadArrayRangeDesignator : 1; 256 257 /// Whether this initializer list initializes a std::initializer_list 258 /// object. 259 unsigned InitializesStdInitializerList : 1; 260 }; 261 262 class TypeTraitExprBitfields { 263 friend class TypeTraitExpr; 264 friend class ASTStmtReader; 265 friend class ASTStmtWriter; 266 267 unsigned : NumExprBits; 268 269 /// \brief The kind of type trait, which is a value of a TypeTrait enumerator. 270 unsigned Kind : 8; 271 272 /// \brief If this expression is not value-dependent, this indicates whether 273 /// the trait evaluated true or false. 274 unsigned Value : 1; 275 276 /// \brief The number of arguments to this type trait. 277 unsigned NumArgs : 32 - 8 - 1 - NumExprBits; 278 }; 279 280 union { 281 // FIXME: this is wasteful on 64-bit platforms. 282 void *Aligner; 283 284 StmtBitfields StmtBits; 285 CompoundStmtBitfields CompoundStmtBits; 286 ExprBitfields ExprBits; 287 CharacterLiteralBitfields CharacterLiteralBits; 288 FloatingLiteralBitfields FloatingLiteralBits; 289 UnaryExprOrTypeTraitExprBitfields UnaryExprOrTypeTraitExprBits; 290 DeclRefExprBitfields DeclRefExprBits; 291 CastExprBitfields CastExprBits; 292 CallExprBitfields CallExprBits; 293 ExprWithCleanupsBitfields ExprWithCleanupsBits; 294 PseudoObjectExprBitfields PseudoObjectExprBits; 295 ObjCIndirectCopyRestoreExprBitfields ObjCIndirectCopyRestoreExprBits; 296 InitListExprBitfields InitListExprBits; 297 TypeTraitExprBitfields TypeTraitExprBits; 298 }; 299 300 friend class ASTStmtReader; 301 friend class ASTStmtWriter; 302 303public: 304 // Only allow allocation of Stmts using the allocator in ASTContext 305 // or by doing a placement new. 306 void* operator new(size_t bytes, ASTContext& C, 307 unsigned alignment = 8) throw(); 308 309 void* operator new(size_t bytes, ASTContext* C, 310 unsigned alignment = 8) throw(); 311 312 void* operator new(size_t bytes, void* mem) throw() { 313 return mem; 314 } 315 316 void operator delete(void*, ASTContext&, unsigned) throw() { } 317 void operator delete(void*, ASTContext*, unsigned) throw() { } 318 void operator delete(void*, std::size_t) throw() { } 319 void operator delete(void*, void*) throw() { } 320 321public: 322 /// \brief A placeholder type used to construct an empty shell of a 323 /// type, that will be filled in later (e.g., by some 324 /// de-serialization). 325 struct EmptyShell { }; 326 327private: 328 /// \brief Whether statistic collection is enabled. 329 static bool StatisticsEnabled; 330 331protected: 332 /// \brief Construct an empty statement. 333 explicit Stmt(StmtClass SC, EmptyShell) { 334 StmtBits.sClass = SC; 335 if (StatisticsEnabled) Stmt::addStmtClass(SC); 336 } 337 338public: 339 Stmt(StmtClass SC) { 340 StmtBits.sClass = SC; 341 if (StatisticsEnabled) Stmt::addStmtClass(SC); 342 } 343 344 StmtClass getStmtClass() const { 345 return static_cast<StmtClass>(StmtBits.sClass); 346 } 347 const char *getStmtClassName() const; 348 349 /// SourceLocation tokens are not useful in isolation - they are low level 350 /// value objects created/interpreted by SourceManager. We assume AST 351 /// clients will have a pointer to the respective SourceManager. 352 SourceRange getSourceRange() const LLVM_READONLY; 353 SourceLocation getLocStart() const LLVM_READONLY; 354 SourceLocation getLocEnd() const LLVM_READONLY; 355 356 // global temp stats (until we have a per-module visitor) 357 static void addStmtClass(const StmtClass s); 358 static void EnableStatistics(); 359 static void PrintStats(); 360 361 /// \brief Dumps the specified AST fragment and all subtrees to 362 /// \c llvm::errs(). 363 LLVM_ATTRIBUTE_USED void dump() const; 364 LLVM_ATTRIBUTE_USED void dump(SourceManager &SM) const; 365 void dump(raw_ostream &OS, SourceManager &SM) const; 366 367 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 368 /// back to its original source language syntax. 369 void dumpPretty(ASTContext &Context) const; 370 void printPretty(raw_ostream &OS, PrinterHelper *Helper, 371 const PrintingPolicy &Policy, 372 unsigned Indentation = 0) const; 373 374 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 375 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 376 void viewAST() const; 377 378 /// Skip past any implicit AST nodes which might surround this 379 /// statement, such as ExprWithCleanups or ImplicitCastExpr nodes. 380 Stmt *IgnoreImplicit(); 381 382 const Stmt *stripLabelLikeStatements() const; 383 Stmt *stripLabelLikeStatements() { 384 return const_cast<Stmt*>( 385 const_cast<const Stmt*>(this)->stripLabelLikeStatements()); 386 } 387 388 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 389 /// contain implicit control-flow in the order their subexpressions 390 /// are evaluated. This predicate returns true if this statement has 391 /// such implicit control-flow. Such statements are also specially handled 392 /// within CFGs. 393 bool hasImplicitControlFlow() const; 394 395 /// Child Iterators: All subclasses must implement 'children' 396 /// to permit easy iteration over the substatements/subexpessions of an 397 /// AST node. This permits easy iteration over all nodes in the AST. 398 typedef StmtIterator child_iterator; 399 typedef ConstStmtIterator const_child_iterator; 400 401 typedef StmtRange child_range; 402 typedef ConstStmtRange const_child_range; 403 404 child_range children(); 405 const_child_range children() const { 406 return const_cast<Stmt*>(this)->children(); 407 } 408 409 child_iterator child_begin() { return children().first; } 410 child_iterator child_end() { return children().second; } 411 412 const_child_iterator child_begin() const { return children().first; } 413 const_child_iterator child_end() const { return children().second; } 414 415 /// \brief Produce a unique representation of the given statement. 416 /// 417 /// \param ID once the profiling operation is complete, will contain 418 /// the unique representation of the given statement. 419 /// 420 /// \param Context the AST context in which the statement resides 421 /// 422 /// \param Canonical whether the profile should be based on the canonical 423 /// representation of this statement (e.g., where non-type template 424 /// parameters are identified by index/level rather than their 425 /// declaration pointers) or the exact representation of the statement as 426 /// written in the source. 427 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 428 bool Canonical) const; 429}; 430 431/// DeclStmt - Adaptor class for mixing declarations with statements and 432/// expressions. For example, CompoundStmt mixes statements, expressions 433/// and declarations (variables, types). Another example is ForStmt, where 434/// the first statement can be an expression or a declaration. 435/// 436class DeclStmt : public Stmt { 437 DeclGroupRef DG; 438 SourceLocation StartLoc, EndLoc; 439 440public: 441 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 442 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 443 StartLoc(startLoc), EndLoc(endLoc) {} 444 445 /// \brief Build an empty declaration statement. 446 explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { } 447 448 /// isSingleDecl - This method returns true if this DeclStmt refers 449 /// to a single Decl. 450 bool isSingleDecl() const { 451 return DG.isSingleDecl(); 452 } 453 454 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 455 Decl *getSingleDecl() { return DG.getSingleDecl(); } 456 457 const DeclGroupRef getDeclGroup() const { return DG; } 458 DeclGroupRef getDeclGroup() { return DG; } 459 void setDeclGroup(DeclGroupRef DGR) { DG = DGR; } 460 461 SourceLocation getStartLoc() const { return StartLoc; } 462 void setStartLoc(SourceLocation L) { StartLoc = L; } 463 SourceLocation getEndLoc() const { return EndLoc; } 464 void setEndLoc(SourceLocation L) { EndLoc = L; } 465 466 SourceRange getSourceRange() const LLVM_READONLY { 467 return SourceRange(StartLoc, EndLoc); 468 } 469 470 static bool classof(const Stmt *T) { 471 return T->getStmtClass() == DeclStmtClass; 472 } 473 474 // Iterators over subexpressions. 475 child_range children() { 476 return child_range(child_iterator(DG.begin(), DG.end()), 477 child_iterator(DG.end(), DG.end())); 478 } 479 480 typedef DeclGroupRef::iterator decl_iterator; 481 typedef DeclGroupRef::const_iterator const_decl_iterator; 482 483 decl_iterator decl_begin() { return DG.begin(); } 484 decl_iterator decl_end() { return DG.end(); } 485 const_decl_iterator decl_begin() const { return DG.begin(); } 486 const_decl_iterator decl_end() const { return DG.end(); } 487 488 typedef std::reverse_iterator<decl_iterator> reverse_decl_iterator; 489 reverse_decl_iterator decl_rbegin() { 490 return reverse_decl_iterator(decl_end()); 491 } 492 reverse_decl_iterator decl_rend() { 493 return reverse_decl_iterator(decl_begin()); 494 } 495}; 496 497/// NullStmt - This is the null statement ";": C99 6.8.3p3. 498/// 499class NullStmt : public Stmt { 500 SourceLocation SemiLoc; 501 502 /// \brief True if the null statement was preceded by an empty macro, e.g: 503 /// @code 504 /// #define CALL(x) 505 /// CALL(0); 506 /// @endcode 507 bool HasLeadingEmptyMacro; 508public: 509 NullStmt(SourceLocation L, bool hasLeadingEmptyMacro = false) 510 : Stmt(NullStmtClass), SemiLoc(L), 511 HasLeadingEmptyMacro(hasLeadingEmptyMacro) {} 512 513 /// \brief Build an empty null statement. 514 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty), 515 HasLeadingEmptyMacro(false) { } 516 517 SourceLocation getSemiLoc() const { return SemiLoc; } 518 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 519 520 bool hasLeadingEmptyMacro() const { return HasLeadingEmptyMacro; } 521 522 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(SemiLoc); } 523 524 static bool classof(const Stmt *T) { 525 return T->getStmtClass() == NullStmtClass; 526 } 527 528 child_range children() { return child_range(); } 529 530 friend class ASTStmtReader; 531 friend class ASTStmtWriter; 532}; 533 534/// CompoundStmt - This represents a group of statements like { stmt stmt }. 535/// 536class CompoundStmt : public Stmt { 537 Stmt** Body; 538 SourceLocation LBracLoc, RBracLoc; 539public: 540 CompoundStmt(ASTContext &C, Stmt **StmtStart, unsigned NumStmts, 541 SourceLocation LB, SourceLocation RB); 542 543 // \brief Build an empty compound statment with a location. 544 explicit CompoundStmt(SourceLocation Loc) 545 : Stmt(CompoundStmtClass), Body(0), LBracLoc(Loc), RBracLoc(Loc) { 546 CompoundStmtBits.NumStmts = 0; 547 } 548 549 // \brief Build an empty compound statement. 550 explicit CompoundStmt(EmptyShell Empty) 551 : Stmt(CompoundStmtClass, Empty), Body(0) { 552 CompoundStmtBits.NumStmts = 0; 553 } 554 555 void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts); 556 557 bool body_empty() const { return CompoundStmtBits.NumStmts == 0; } 558 unsigned size() const { return CompoundStmtBits.NumStmts; } 559 560 typedef Stmt** body_iterator; 561 body_iterator body_begin() { return Body; } 562 body_iterator body_end() { return Body + size(); } 563 Stmt *body_back() { return !body_empty() ? Body[size()-1] : 0; } 564 565 void setLastStmt(Stmt *S) { 566 assert(!body_empty() && "setLastStmt"); 567 Body[size()-1] = S; 568 } 569 570 typedef Stmt* const * const_body_iterator; 571 const_body_iterator body_begin() const { return Body; } 572 const_body_iterator body_end() const { return Body + size(); } 573 const Stmt *body_back() const { return !body_empty() ? Body[size()-1] : 0; } 574 575 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 576 reverse_body_iterator body_rbegin() { 577 return reverse_body_iterator(body_end()); 578 } 579 reverse_body_iterator body_rend() { 580 return reverse_body_iterator(body_begin()); 581 } 582 583 typedef std::reverse_iterator<const_body_iterator> 584 const_reverse_body_iterator; 585 586 const_reverse_body_iterator body_rbegin() const { 587 return const_reverse_body_iterator(body_end()); 588 } 589 590 const_reverse_body_iterator body_rend() const { 591 return const_reverse_body_iterator(body_begin()); 592 } 593 594 SourceRange getSourceRange() const LLVM_READONLY { 595 return SourceRange(LBracLoc, RBracLoc); 596 } 597 598 SourceLocation getLBracLoc() const { return LBracLoc; } 599 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 600 SourceLocation getRBracLoc() const { return RBracLoc; } 601 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 602 603 static bool classof(const Stmt *T) { 604 return T->getStmtClass() == CompoundStmtClass; 605 } 606 607 // Iterators 608 child_range children() { 609 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 610 } 611 612 const_child_range children() const { 613 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 614 } 615}; 616 617// SwitchCase is the base class for CaseStmt and DefaultStmt, 618class SwitchCase : public Stmt { 619protected: 620 // A pointer to the following CaseStmt or DefaultStmt class, 621 // used by SwitchStmt. 622 SwitchCase *NextSwitchCase; 623 624 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 625 626public: 627 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 628 629 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 630 631 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 632 633 Stmt *getSubStmt(); 634 const Stmt *getSubStmt() const { 635 return const_cast<SwitchCase*>(this)->getSubStmt(); 636 } 637 638 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); } 639 640 static bool classof(const Stmt *T) { 641 return T->getStmtClass() == CaseStmtClass || 642 T->getStmtClass() == DefaultStmtClass; 643 } 644}; 645 646class CaseStmt : public SwitchCase { 647 enum { LHS, RHS, SUBSTMT, END_EXPR }; 648 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 649 // GNU "case 1 ... 4" extension 650 SourceLocation CaseLoc; 651 SourceLocation EllipsisLoc; 652 SourceLocation ColonLoc; 653public: 654 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc, 655 SourceLocation ellipsisLoc, SourceLocation colonLoc) 656 : SwitchCase(CaseStmtClass) { 657 SubExprs[SUBSTMT] = 0; 658 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 659 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 660 CaseLoc = caseLoc; 661 EllipsisLoc = ellipsisLoc; 662 ColonLoc = colonLoc; 663 } 664 665 /// \brief Build an empty switch case statement. 666 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { } 667 668 SourceLocation getCaseLoc() const { return CaseLoc; } 669 void setCaseLoc(SourceLocation L) { CaseLoc = L; } 670 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 671 void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; } 672 SourceLocation getColonLoc() const { return ColonLoc; } 673 void setColonLoc(SourceLocation L) { ColonLoc = L; } 674 675 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 676 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 677 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 678 679 const Expr *getLHS() const { 680 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 681 } 682 const Expr *getRHS() const { 683 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 684 } 685 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 686 687 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 688 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 689 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 690 691 692 SourceRange getSourceRange() const LLVM_READONLY { 693 // Handle deeply nested case statements with iteration instead of recursion. 694 const CaseStmt *CS = this; 695 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 696 CS = CS2; 697 698 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 699 } 700 static bool classof(const Stmt *T) { 701 return T->getStmtClass() == CaseStmtClass; 702 } 703 704 // Iterators 705 child_range children() { 706 return child_range(&SubExprs[0], &SubExprs[END_EXPR]); 707 } 708}; 709 710class DefaultStmt : public SwitchCase { 711 Stmt* SubStmt; 712 SourceLocation DefaultLoc; 713 SourceLocation ColonLoc; 714public: 715 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 716 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL), 717 ColonLoc(CL) {} 718 719 /// \brief Build an empty default statement. 720 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 721 722 Stmt *getSubStmt() { return SubStmt; } 723 const Stmt *getSubStmt() const { return SubStmt; } 724 void setSubStmt(Stmt *S) { SubStmt = S; } 725 726 SourceLocation getDefaultLoc() const { return DefaultLoc; } 727 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 728 SourceLocation getColonLoc() const { return ColonLoc; } 729 void setColonLoc(SourceLocation L) { ColonLoc = L; } 730 731 SourceRange getSourceRange() const LLVM_READONLY { 732 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 733 } 734 static bool classof(const Stmt *T) { 735 return T->getStmtClass() == DefaultStmtClass; 736 } 737 738 // Iterators 739 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 740}; 741 742 743/// LabelStmt - Represents a label, which has a substatement. For example: 744/// foo: return; 745/// 746class LabelStmt : public Stmt { 747 LabelDecl *TheDecl; 748 Stmt *SubStmt; 749 SourceLocation IdentLoc; 750public: 751 LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt) 752 : Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) { 753 } 754 755 // \brief Build an empty label statement. 756 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 757 758 SourceLocation getIdentLoc() const { return IdentLoc; } 759 LabelDecl *getDecl() const { return TheDecl; } 760 void setDecl(LabelDecl *D) { TheDecl = D; } 761 const char *getName() const; 762 Stmt *getSubStmt() { return SubStmt; } 763 const Stmt *getSubStmt() const { return SubStmt; } 764 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 765 void setSubStmt(Stmt *SS) { SubStmt = SS; } 766 767 SourceRange getSourceRange() const LLVM_READONLY { 768 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 769 } 770 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 771 772 static bool classof(const Stmt *T) { 773 return T->getStmtClass() == LabelStmtClass; 774 } 775}; 776 777 778/// \brief Represents an attribute applied to a statement. 779/// 780/// Represents an attribute applied to a statement. For example: 781/// [[omp::for(...)]] for (...) { ... } 782/// 783class AttributedStmt : public Stmt { 784 Stmt *SubStmt; 785 SourceLocation AttrLoc; 786 unsigned NumAttrs; 787 const Attr *Attrs[1]; 788 789 friend class ASTStmtReader; 790 791 AttributedStmt(SourceLocation Loc, ArrayRef<const Attr*> Attrs, Stmt *SubStmt) 792 : Stmt(AttributedStmtClass), SubStmt(SubStmt), AttrLoc(Loc), 793 NumAttrs(Attrs.size()) { 794 memcpy(this->Attrs, Attrs.data(), Attrs.size() * sizeof(Attr*)); 795 } 796 797 explicit AttributedStmt(EmptyShell Empty, unsigned NumAttrs) 798 : Stmt(AttributedStmtClass, Empty), NumAttrs(NumAttrs) { 799 memset(Attrs, 0, NumAttrs * sizeof(Attr*)); 800 } 801 802public: 803 static AttributedStmt *Create(ASTContext &C, SourceLocation Loc, 804 ArrayRef<const Attr*> Attrs, Stmt *SubStmt); 805 // \brief Build an empty attributed statement. 806 static AttributedStmt *CreateEmpty(ASTContext &C, unsigned NumAttrs); 807 808 SourceLocation getAttrLoc() const { return AttrLoc; } 809 ArrayRef<const Attr*> getAttrs() const { 810 return ArrayRef<const Attr*>(Attrs, NumAttrs); 811 } 812 Stmt *getSubStmt() { return SubStmt; } 813 const Stmt *getSubStmt() const { return SubStmt; } 814 815 SourceRange getSourceRange() const LLVM_READONLY { 816 return SourceRange(AttrLoc, SubStmt->getLocEnd()); 817 } 818 child_range children() { return child_range(&SubStmt, &SubStmt + 1); } 819 820 static bool classof(const Stmt *T) { 821 return T->getStmtClass() == AttributedStmtClass; 822 } 823}; 824 825 826/// IfStmt - This represents an if/then/else. 827/// 828class IfStmt : public Stmt { 829 enum { VAR, COND, THEN, ELSE, END_EXPR }; 830 Stmt* SubExprs[END_EXPR]; 831 832 SourceLocation IfLoc; 833 SourceLocation ElseLoc; 834 835public: 836 IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond, 837 Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0); 838 839 /// \brief Build an empty if/then/else statement 840 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 841 842 /// \brief Retrieve the variable declared in this "if" statement, if any. 843 /// 844 /// In the following example, "x" is the condition variable. 845 /// \code 846 /// if (int x = foo()) { 847 /// printf("x is %d", x); 848 /// } 849 /// \endcode 850 VarDecl *getConditionVariable() const; 851 void setConditionVariable(ASTContext &C, VarDecl *V); 852 853 /// If this IfStmt has a condition variable, return the faux DeclStmt 854 /// associated with the creation of that condition variable. 855 const DeclStmt *getConditionVariableDeclStmt() const { 856 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 857 } 858 859 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 860 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 861 const Stmt *getThen() const { return SubExprs[THEN]; } 862 void setThen(Stmt *S) { SubExprs[THEN] = S; } 863 const Stmt *getElse() const { return SubExprs[ELSE]; } 864 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 865 866 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 867 Stmt *getThen() { return SubExprs[THEN]; } 868 Stmt *getElse() { return SubExprs[ELSE]; } 869 870 SourceLocation getIfLoc() const { return IfLoc; } 871 void setIfLoc(SourceLocation L) { IfLoc = L; } 872 SourceLocation getElseLoc() const { return ElseLoc; } 873 void setElseLoc(SourceLocation L) { ElseLoc = L; } 874 875 SourceRange getSourceRange() const LLVM_READONLY { 876 if (SubExprs[ELSE]) 877 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 878 else 879 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 880 } 881 882 // Iterators over subexpressions. The iterators will include iterating 883 // over the initialization expression referenced by the condition variable. 884 child_range children() { 885 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 886 } 887 888 static bool classof(const Stmt *T) { 889 return T->getStmtClass() == IfStmtClass; 890 } 891}; 892 893/// SwitchStmt - This represents a 'switch' stmt. 894/// 895class SwitchStmt : public Stmt { 896 enum { VAR, COND, BODY, END_EXPR }; 897 Stmt* SubExprs[END_EXPR]; 898 // This points to a linked list of case and default statements. 899 SwitchCase *FirstCase; 900 SourceLocation SwitchLoc; 901 902 /// If the SwitchStmt is a switch on an enum value, this records whether 903 /// all the enum values were covered by CaseStmts. This value is meant to 904 /// be a hint for possible clients. 905 unsigned AllEnumCasesCovered : 1; 906 907public: 908 SwitchStmt(ASTContext &C, VarDecl *Var, Expr *cond); 909 910 /// \brief Build a empty switch statement. 911 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 912 913 /// \brief Retrieve the variable declared in this "switch" statement, if any. 914 /// 915 /// In the following example, "x" is the condition variable. 916 /// \code 917 /// switch (int x = foo()) { 918 /// case 0: break; 919 /// // ... 920 /// } 921 /// \endcode 922 VarDecl *getConditionVariable() const; 923 void setConditionVariable(ASTContext &C, VarDecl *V); 924 925 /// If this SwitchStmt has a condition variable, return the faux DeclStmt 926 /// associated with the creation of that condition variable. 927 const DeclStmt *getConditionVariableDeclStmt() const { 928 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 929 } 930 931 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 932 const Stmt *getBody() const { return SubExprs[BODY]; } 933 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 934 935 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 936 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 937 Stmt *getBody() { return SubExprs[BODY]; } 938 void setBody(Stmt *S) { SubExprs[BODY] = S; } 939 SwitchCase *getSwitchCaseList() { return FirstCase; } 940 941 /// \brief Set the case list for this switch statement. 942 /// 943 /// The caller is responsible for incrementing the retain counts on 944 /// all of the SwitchCase statements in this list. 945 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 946 947 SourceLocation getSwitchLoc() const { return SwitchLoc; } 948 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 949 950 void setBody(Stmt *S, SourceLocation SL) { 951 SubExprs[BODY] = S; 952 SwitchLoc = SL; 953 } 954 void addSwitchCase(SwitchCase *SC) { 955 assert(!SC->getNextSwitchCase() 956 && "case/default already added to a switch"); 957 SC->setNextSwitchCase(FirstCase); 958 FirstCase = SC; 959 } 960 961 /// Set a flag in the SwitchStmt indicating that if the 'switch (X)' is a 962 /// switch over an enum value then all cases have been explicitly covered. 963 void setAllEnumCasesCovered() { 964 AllEnumCasesCovered = 1; 965 } 966 967 /// Returns true if the SwitchStmt is a switch of an enum value and all cases 968 /// have been explicitly covered. 969 bool isAllEnumCasesCovered() const { 970 return (bool) AllEnumCasesCovered; 971 } 972 973 SourceRange getSourceRange() const LLVM_READONLY { 974 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 975 } 976 // Iterators 977 child_range children() { 978 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 979 } 980 981 static bool classof(const Stmt *T) { 982 return T->getStmtClass() == SwitchStmtClass; 983 } 984}; 985 986 987/// WhileStmt - This represents a 'while' stmt. 988/// 989class WhileStmt : public Stmt { 990 enum { VAR, COND, BODY, END_EXPR }; 991 Stmt* SubExprs[END_EXPR]; 992 SourceLocation WhileLoc; 993public: 994 WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body, 995 SourceLocation WL); 996 997 /// \brief Build an empty while statement. 998 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 999 1000 /// \brief Retrieve the variable declared in this "while" statement, if any. 1001 /// 1002 /// In the following example, "x" is the condition variable. 1003 /// \code 1004 /// while (int x = random()) { 1005 /// // ... 1006 /// } 1007 /// \endcode 1008 VarDecl *getConditionVariable() const; 1009 void setConditionVariable(ASTContext &C, VarDecl *V); 1010 1011 /// If this WhileStmt has a condition variable, return the faux DeclStmt 1012 /// associated with the creation of that condition variable. 1013 const DeclStmt *getConditionVariableDeclStmt() const { 1014 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 1015 } 1016 1017 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1018 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1019 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1020 Stmt *getBody() { return SubExprs[BODY]; } 1021 const Stmt *getBody() const { return SubExprs[BODY]; } 1022 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1023 1024 SourceLocation getWhileLoc() const { return WhileLoc; } 1025 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1026 1027 SourceRange getSourceRange() const LLVM_READONLY { 1028 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 1029 } 1030 static bool classof(const Stmt *T) { 1031 return T->getStmtClass() == WhileStmtClass; 1032 } 1033 1034 // Iterators 1035 child_range children() { 1036 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1037 } 1038}; 1039 1040/// DoStmt - This represents a 'do/while' stmt. 1041/// 1042class DoStmt : public Stmt { 1043 enum { BODY, COND, END_EXPR }; 1044 Stmt* SubExprs[END_EXPR]; 1045 SourceLocation DoLoc; 1046 SourceLocation WhileLoc; 1047 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 1048 1049public: 1050 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 1051 SourceLocation RP) 1052 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 1053 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 1054 SubExprs[BODY] = body; 1055 } 1056 1057 /// \brief Build an empty do-while statement. 1058 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 1059 1060 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1061 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1062 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1063 Stmt *getBody() { return SubExprs[BODY]; } 1064 const Stmt *getBody() const { return SubExprs[BODY]; } 1065 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1066 1067 SourceLocation getDoLoc() const { return DoLoc; } 1068 void setDoLoc(SourceLocation L) { DoLoc = L; } 1069 SourceLocation getWhileLoc() const { return WhileLoc; } 1070 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1071 1072 SourceLocation getRParenLoc() const { return RParenLoc; } 1073 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1074 1075 SourceRange getSourceRange() const LLVM_READONLY { 1076 return SourceRange(DoLoc, RParenLoc); 1077 } 1078 static bool classof(const Stmt *T) { 1079 return T->getStmtClass() == DoStmtClass; 1080 } 1081 1082 // Iterators 1083 child_range children() { 1084 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1085 } 1086}; 1087 1088 1089/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 1090/// the init/cond/inc parts of the ForStmt will be null if they were not 1091/// specified in the source. 1092/// 1093class ForStmt : public Stmt { 1094 enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR }; 1095 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 1096 SourceLocation ForLoc; 1097 SourceLocation LParenLoc, RParenLoc; 1098 1099public: 1100 ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc, 1101 Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP); 1102 1103 /// \brief Build an empty for statement. 1104 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 1105 1106 Stmt *getInit() { return SubExprs[INIT]; } 1107 1108 /// \brief Retrieve the variable declared in this "for" statement, if any. 1109 /// 1110 /// In the following example, "y" is the condition variable. 1111 /// \code 1112 /// for (int x = random(); int y = mangle(x); ++x) { 1113 /// // ... 1114 /// } 1115 /// \endcode 1116 VarDecl *getConditionVariable() const; 1117 void setConditionVariable(ASTContext &C, VarDecl *V); 1118 1119 /// If this ForStmt has a condition variable, return the faux DeclStmt 1120 /// associated with the creation of that condition variable. 1121 const DeclStmt *getConditionVariableDeclStmt() const { 1122 return reinterpret_cast<DeclStmt*>(SubExprs[CONDVAR]); 1123 } 1124 1125 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1126 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1127 Stmt *getBody() { return SubExprs[BODY]; } 1128 1129 const Stmt *getInit() const { return SubExprs[INIT]; } 1130 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1131 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1132 const Stmt *getBody() const { return SubExprs[BODY]; } 1133 1134 void setInit(Stmt *S) { SubExprs[INIT] = S; } 1135 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1136 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 1137 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1138 1139 SourceLocation getForLoc() const { return ForLoc; } 1140 void setForLoc(SourceLocation L) { ForLoc = L; } 1141 SourceLocation getLParenLoc() const { return LParenLoc; } 1142 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1143 SourceLocation getRParenLoc() const { return RParenLoc; } 1144 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1145 1146 SourceRange getSourceRange() const LLVM_READONLY { 1147 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 1148 } 1149 static bool classof(const Stmt *T) { 1150 return T->getStmtClass() == ForStmtClass; 1151 } 1152 1153 // Iterators 1154 child_range children() { 1155 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1156 } 1157}; 1158 1159/// GotoStmt - This represents a direct goto. 1160/// 1161class GotoStmt : public Stmt { 1162 LabelDecl *Label; 1163 SourceLocation GotoLoc; 1164 SourceLocation LabelLoc; 1165public: 1166 GotoStmt(LabelDecl *label, SourceLocation GL, SourceLocation LL) 1167 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 1168 1169 /// \brief Build an empty goto statement. 1170 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 1171 1172 LabelDecl *getLabel() const { return Label; } 1173 void setLabel(LabelDecl *D) { Label = D; } 1174 1175 SourceLocation getGotoLoc() const { return GotoLoc; } 1176 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1177 SourceLocation getLabelLoc() const { return LabelLoc; } 1178 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 1179 1180 SourceRange getSourceRange() const LLVM_READONLY { 1181 return SourceRange(GotoLoc, LabelLoc); 1182 } 1183 static bool classof(const Stmt *T) { 1184 return T->getStmtClass() == GotoStmtClass; 1185 } 1186 1187 // Iterators 1188 child_range children() { return child_range(); } 1189}; 1190 1191/// IndirectGotoStmt - This represents an indirect goto. 1192/// 1193class IndirectGotoStmt : public Stmt { 1194 SourceLocation GotoLoc; 1195 SourceLocation StarLoc; 1196 Stmt *Target; 1197public: 1198 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 1199 Expr *target) 1200 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 1201 Target((Stmt*)target) {} 1202 1203 /// \brief Build an empty indirect goto statement. 1204 explicit IndirectGotoStmt(EmptyShell Empty) 1205 : Stmt(IndirectGotoStmtClass, Empty) { } 1206 1207 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1208 SourceLocation getGotoLoc() const { return GotoLoc; } 1209 void setStarLoc(SourceLocation L) { StarLoc = L; } 1210 SourceLocation getStarLoc() const { return StarLoc; } 1211 1212 Expr *getTarget() { return reinterpret_cast<Expr*>(Target); } 1213 const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);} 1214 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 1215 1216 /// getConstantTarget - Returns the fixed target of this indirect 1217 /// goto, if one exists. 1218 LabelDecl *getConstantTarget(); 1219 const LabelDecl *getConstantTarget() const { 1220 return const_cast<IndirectGotoStmt*>(this)->getConstantTarget(); 1221 } 1222 1223 SourceRange getSourceRange() const LLVM_READONLY { 1224 return SourceRange(GotoLoc, Target->getLocEnd()); 1225 } 1226 1227 static bool classof(const Stmt *T) { 1228 return T->getStmtClass() == IndirectGotoStmtClass; 1229 } 1230 1231 // Iterators 1232 child_range children() { return child_range(&Target, &Target+1); } 1233}; 1234 1235 1236/// ContinueStmt - This represents a continue. 1237/// 1238class ContinueStmt : public Stmt { 1239 SourceLocation ContinueLoc; 1240public: 1241 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 1242 1243 /// \brief Build an empty continue statement. 1244 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 1245 1246 SourceLocation getContinueLoc() const { return ContinueLoc; } 1247 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 1248 1249 SourceRange getSourceRange() const LLVM_READONLY { 1250 return SourceRange(ContinueLoc); 1251 } 1252 1253 static bool classof(const Stmt *T) { 1254 return T->getStmtClass() == ContinueStmtClass; 1255 } 1256 1257 // Iterators 1258 child_range children() { return child_range(); } 1259}; 1260 1261/// BreakStmt - This represents a break. 1262/// 1263class BreakStmt : public Stmt { 1264 SourceLocation BreakLoc; 1265public: 1266 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 1267 1268 /// \brief Build an empty break statement. 1269 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 1270 1271 SourceLocation getBreakLoc() const { return BreakLoc; } 1272 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 1273 1274 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(BreakLoc); } 1275 1276 static bool classof(const Stmt *T) { 1277 return T->getStmtClass() == BreakStmtClass; 1278 } 1279 1280 // Iterators 1281 child_range children() { return child_range(); } 1282}; 1283 1284 1285/// ReturnStmt - This represents a return, optionally of an expression: 1286/// return; 1287/// return 4; 1288/// 1289/// Note that GCC allows return with no argument in a function declared to 1290/// return a value, and it allows returning a value in functions declared to 1291/// return void. We explicitly model this in the AST, which means you can't 1292/// depend on the return type of the function and the presence of an argument. 1293/// 1294class ReturnStmt : public Stmt { 1295 Stmt *RetExpr; 1296 SourceLocation RetLoc; 1297 const VarDecl *NRVOCandidate; 1298 1299public: 1300 ReturnStmt(SourceLocation RL) 1301 : Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { } 1302 1303 ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate) 1304 : Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL), 1305 NRVOCandidate(NRVOCandidate) {} 1306 1307 /// \brief Build an empty return expression. 1308 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1309 1310 const Expr *getRetValue() const; 1311 Expr *getRetValue(); 1312 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1313 1314 SourceLocation getReturnLoc() const { return RetLoc; } 1315 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1316 1317 /// \brief Retrieve the variable that might be used for the named return 1318 /// value optimization. 1319 /// 1320 /// The optimization itself can only be performed if the variable is 1321 /// also marked as an NRVO object. 1322 const VarDecl *getNRVOCandidate() const { return NRVOCandidate; } 1323 void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; } 1324 1325 SourceRange getSourceRange() const LLVM_READONLY; 1326 1327 static bool classof(const Stmt *T) { 1328 return T->getStmtClass() == ReturnStmtClass; 1329 } 1330 1331 // Iterators 1332 child_range children() { 1333 if (RetExpr) return child_range(&RetExpr, &RetExpr+1); 1334 return child_range(); 1335 } 1336}; 1337 1338/// AsmStmt is the base class for GCCAsmStmt and MSAsmStmt. 1339/// 1340class AsmStmt : public Stmt { 1341protected: 1342 SourceLocation AsmLoc; 1343 /// \brief True if the assembly statement does not have any input or output 1344 /// operands. 1345 bool IsSimple; 1346 1347 /// \brief If true, treat this inline assembly as having side effects. 1348 /// This assembly statement should not be optimized, deleted or moved. 1349 bool IsVolatile; 1350 1351 unsigned NumOutputs; 1352 unsigned NumInputs; 1353 unsigned NumClobbers; 1354 1355 IdentifierInfo **Names; 1356 Stmt **Exprs; 1357 1358 AsmStmt(StmtClass SC, SourceLocation asmloc, bool issimple, bool isvolatile, 1359 unsigned numoutputs, unsigned numinputs, unsigned numclobbers) : 1360 Stmt (SC), AsmLoc(asmloc), IsSimple(issimple), IsVolatile(isvolatile), 1361 NumOutputs(numoutputs), NumInputs(numinputs), NumClobbers(numclobbers) { } 1362 1363public: 1364 /// \brief Build an empty inline-assembly statement. 1365 explicit AsmStmt(StmtClass SC, EmptyShell Empty) : 1366 Stmt(SC, Empty), Names(0), Exprs(0) { } 1367 1368 SourceLocation getAsmLoc() const { return AsmLoc; } 1369 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1370 1371 bool isSimple() const { return IsSimple; } 1372 void setSimple(bool V) { IsSimple = V; } 1373 1374 bool isVolatile() const { return IsVolatile; } 1375 void setVolatile(bool V) { IsVolatile = V; } 1376 1377 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); } 1378 1379 //===--- Asm String Analysis ---===// 1380 1381 /// Assemble final IR asm string. 1382 std::string generateAsmString(ASTContext &C) const; 1383 1384 //===--- Output operands ---===// 1385 1386 unsigned getNumOutputs() const { return NumOutputs; } 1387 1388 IdentifierInfo *getOutputIdentifier(unsigned i) const { 1389 return Names[i]; 1390 } 1391 1392 StringRef getOutputName(unsigned i) const { 1393 if (IdentifierInfo *II = getOutputIdentifier(i)) 1394 return II->getName(); 1395 1396 return StringRef(); 1397 } 1398 1399 /// getOutputConstraint - Return the constraint string for the specified 1400 /// output operand. All output constraints are known to be non-empty (either 1401 /// '=' or '+'). 1402 StringRef getOutputConstraint(unsigned i) const; 1403 1404 /// isOutputPlusConstraint - Return true if the specified output constraint 1405 /// is a "+" constraint (which is both an input and an output) or false if it 1406 /// is an "=" constraint (just an output). 1407 bool isOutputPlusConstraint(unsigned i) const { 1408 return getOutputConstraint(i)[0] == '+'; 1409 } 1410 1411 const Expr *getOutputExpr(unsigned i) const; 1412 1413 /// getNumPlusOperands - Return the number of output operands that have a "+" 1414 /// constraint. 1415 unsigned getNumPlusOperands() const; 1416 1417 //===--- Input operands ---===// 1418 1419 unsigned getNumInputs() const { return NumInputs; } 1420 1421 IdentifierInfo *getInputIdentifier(unsigned i) const { 1422 return Names[i + NumOutputs]; 1423 } 1424 1425 StringRef getInputName(unsigned i) const { 1426 if (IdentifierInfo *II = getInputIdentifier(i)) 1427 return II->getName(); 1428 1429 return StringRef(); 1430 } 1431 1432 /// getInputConstraint - Return the specified input constraint. Unlike output 1433 /// constraints, these can be empty. 1434 StringRef getInputConstraint(unsigned i) const; 1435 1436 const Expr *getInputExpr(unsigned i) const; 1437 1438 //===--- Other ---===// 1439 1440 unsigned getNumClobbers() const { return NumClobbers; } 1441 StringRef getClobber(unsigned i) const; 1442 1443 static bool classof(const Stmt *T) { 1444 return T->getStmtClass() == GCCAsmStmtClass || 1445 T->getStmtClass() == MSAsmStmtClass; 1446 } 1447 1448 // Input expr iterators. 1449 1450 typedef ExprIterator inputs_iterator; 1451 typedef ConstExprIterator const_inputs_iterator; 1452 1453 inputs_iterator begin_inputs() { 1454 return &Exprs[0] + NumOutputs; 1455 } 1456 1457 inputs_iterator end_inputs() { 1458 return &Exprs[0] + NumOutputs + NumInputs; 1459 } 1460 1461 const_inputs_iterator begin_inputs() const { 1462 return &Exprs[0] + NumOutputs; 1463 } 1464 1465 const_inputs_iterator end_inputs() const { 1466 return &Exprs[0] + NumOutputs + NumInputs; 1467 } 1468 1469 // Output expr iterators. 1470 1471 typedef ExprIterator outputs_iterator; 1472 typedef ConstExprIterator const_outputs_iterator; 1473 1474 outputs_iterator begin_outputs() { 1475 return &Exprs[0]; 1476 } 1477 outputs_iterator end_outputs() { 1478 return &Exprs[0] + NumOutputs; 1479 } 1480 1481 const_outputs_iterator begin_outputs() const { 1482 return &Exprs[0]; 1483 } 1484 const_outputs_iterator end_outputs() const { 1485 return &Exprs[0] + NumOutputs; 1486 } 1487 1488 child_range children() { 1489 return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs); 1490 } 1491}; 1492 1493/// This represents a GCC inline-assembly statement extension. 1494/// 1495class GCCAsmStmt : public AsmStmt { 1496 SourceLocation RParenLoc; 1497 StringLiteral *AsmStr; 1498 1499 // FIXME: If we wanted to, we could allocate all of these in one big array. 1500 StringLiteral **Constraints; 1501 StringLiteral **Clobbers; 1502 1503public: 1504 GCCAsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, 1505 bool isvolatile, unsigned numoutputs, unsigned numinputs, 1506 IdentifierInfo **names, StringLiteral **constraints, Expr **exprs, 1507 StringLiteral *asmstr, unsigned numclobbers, 1508 StringLiteral **clobbers, SourceLocation rparenloc); 1509 1510 /// \brief Build an empty inline-assembly statement. 1511 explicit GCCAsmStmt(EmptyShell Empty) : AsmStmt(GCCAsmStmtClass, Empty), 1512 Constraints(0), Clobbers(0) { } 1513 1514 SourceLocation getRParenLoc() const { return RParenLoc; } 1515 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1516 1517 //===--- Asm String Analysis ---===// 1518 1519 const StringLiteral *getAsmString() const { return AsmStr; } 1520 StringLiteral *getAsmString() { return AsmStr; } 1521 void setAsmString(StringLiteral *E) { AsmStr = E; } 1522 1523 /// AsmStringPiece - this is part of a decomposed asm string specification 1524 /// (for use with the AnalyzeAsmString function below). An asm string is 1525 /// considered to be a concatenation of these parts. 1526 class AsmStringPiece { 1527 public: 1528 enum Kind { 1529 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1530 Operand // Operand reference, with optional modifier %c4. 1531 }; 1532 private: 1533 Kind MyKind; 1534 std::string Str; 1535 unsigned OperandNo; 1536 public: 1537 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1538 AsmStringPiece(unsigned OpNo, char Modifier) 1539 : MyKind(Operand), Str(), OperandNo(OpNo) { 1540 Str += Modifier; 1541 } 1542 1543 bool isString() const { return MyKind == String; } 1544 bool isOperand() const { return MyKind == Operand; } 1545 1546 const std::string &getString() const { 1547 assert(isString()); 1548 return Str; 1549 } 1550 1551 unsigned getOperandNo() const { 1552 assert(isOperand()); 1553 return OperandNo; 1554 } 1555 1556 /// getModifier - Get the modifier for this operand, if present. This 1557 /// returns '\0' if there was no modifier. 1558 char getModifier() const { 1559 assert(isOperand()); 1560 return Str[0]; 1561 } 1562 }; 1563 1564 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1565 /// it into pieces. If the asm string is erroneous, emit errors and return 1566 /// true, otherwise return false. This handles canonicalization and 1567 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1568 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1569 unsigned AnalyzeAsmString(SmallVectorImpl<AsmStringPiece> &Pieces, 1570 ASTContext &C, unsigned &DiagOffs) const; 1571 1572 /// Assemble final IR asm string. 1573 std::string generateAsmString(ASTContext &C) const; 1574 1575 //===--- Output operands ---===// 1576 1577 StringRef getOutputConstraint(unsigned i) const; 1578 1579 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1580 return Constraints[i]; 1581 } 1582 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1583 return Constraints[i]; 1584 } 1585 1586 Expr *getOutputExpr(unsigned i); 1587 1588 const Expr *getOutputExpr(unsigned i) const { 1589 return const_cast<GCCAsmStmt*>(this)->getOutputExpr(i); 1590 } 1591 1592 //===--- Input operands ---===// 1593 1594 StringRef getInputConstraint(unsigned i) const; 1595 1596 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1597 return Constraints[i + NumOutputs]; 1598 } 1599 StringLiteral *getInputConstraintLiteral(unsigned i) { 1600 return Constraints[i + NumOutputs]; 1601 } 1602 1603 Expr *getInputExpr(unsigned i); 1604 void setInputExpr(unsigned i, Expr *E); 1605 1606 const Expr *getInputExpr(unsigned i) const { 1607 return const_cast<GCCAsmStmt*>(this)->getInputExpr(i); 1608 } 1609 1610 void setOutputsAndInputsAndClobbers(ASTContext &C, 1611 IdentifierInfo **Names, 1612 StringLiteral **Constraints, 1613 Stmt **Exprs, 1614 unsigned NumOutputs, 1615 unsigned NumInputs, 1616 StringLiteral **Clobbers, 1617 unsigned NumClobbers); 1618 1619 //===--- Other ---===// 1620 1621 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1622 /// translate this into a numeric value needed to reference the same operand. 1623 /// This returns -1 if the operand name is invalid. 1624 int getNamedOperand(StringRef SymbolicName) const; 1625 1626 StringRef getClobber(unsigned i) const; 1627 StringLiteral *getClobberStringLiteral(unsigned i) { return Clobbers[i]; } 1628 const StringLiteral *getClobberStringLiteral(unsigned i) const { 1629 return Clobbers[i]; 1630 } 1631 1632 SourceRange getSourceRange() const LLVM_READONLY { 1633 return SourceRange(AsmLoc, RParenLoc); 1634 } 1635 1636 static bool classof(const Stmt *T) { 1637 return T->getStmtClass() == GCCAsmStmtClass; 1638 } 1639}; 1640 1641/// This represents a Microsoft inline-assembly statement extension. 1642/// 1643class MSAsmStmt : public AsmStmt { 1644 SourceLocation AsmLoc, LBraceLoc, EndLoc; 1645 std::string AsmStr; 1646 1647 unsigned NumAsmToks; 1648 1649 Token *AsmToks; 1650 StringRef *Constraints; 1651 StringRef *Clobbers; 1652 1653public: 1654 MSAsmStmt(ASTContext &C, SourceLocation asmloc, SourceLocation lbraceloc, 1655 bool issimple, bool isvolatile, ArrayRef<Token> asmtoks, 1656 unsigned numoutputs, unsigned numinputs, 1657 ArrayRef<IdentifierInfo*> names, ArrayRef<StringRef> constraints, 1658 ArrayRef<Expr*> exprs, StringRef asmstr, 1659 ArrayRef<StringRef> clobbers, SourceLocation endloc); 1660 1661 /// \brief Build an empty MS-style inline-assembly statement. 1662 explicit MSAsmStmt(EmptyShell Empty) : AsmStmt(MSAsmStmtClass, Empty), 1663 NumAsmToks(0), AsmToks(0), Constraints(0), Clobbers(0) { } 1664 1665 SourceLocation getLBraceLoc() const { return LBraceLoc; } 1666 void setLBraceLoc(SourceLocation L) { LBraceLoc = L; } 1667 SourceLocation getEndLoc() const { return EndLoc; } 1668 void setEndLoc(SourceLocation L) { EndLoc = L; } 1669 1670 bool hasBraces() const { return LBraceLoc.isValid(); } 1671 1672 unsigned getNumAsmToks() { return NumAsmToks; } 1673 Token *getAsmToks() { return AsmToks; } 1674 1675 //===--- Asm String Analysis ---===// 1676 1677 const std::string *getAsmString() const { return &AsmStr; } 1678 std::string *getAsmString() { return &AsmStr; } 1679 void setAsmString(StringRef &E) { AsmStr = E.str(); } 1680 1681 /// Assemble final IR asm string. 1682 std::string generateAsmString(ASTContext &C) const; 1683 1684 //===--- Output operands ---===// 1685 1686 StringRef getOutputConstraint(unsigned i) const { 1687 return Constraints[i]; 1688 } 1689 1690 Expr *getOutputExpr(unsigned i); 1691 1692 const Expr *getOutputExpr(unsigned i) const { 1693 return const_cast<MSAsmStmt*>(this)->getOutputExpr(i); 1694 } 1695 1696 //===--- Input operands ---===// 1697 1698 StringRef getInputConstraint(unsigned i) const { 1699 return Constraints[i + NumOutputs]; 1700 } 1701 1702 Expr *getInputExpr(unsigned i); 1703 void setInputExpr(unsigned i, Expr *E); 1704 1705 const Expr *getInputExpr(unsigned i) const { 1706 return const_cast<MSAsmStmt*>(this)->getInputExpr(i); 1707 } 1708 1709 //===--- Other ---===// 1710 1711 StringRef getClobber(unsigned i) const { return Clobbers[i]; } 1712 1713 SourceRange getSourceRange() const LLVM_READONLY { 1714 return SourceRange(AsmLoc, EndLoc); 1715 } 1716 static bool classof(const Stmt *T) { 1717 return T->getStmtClass() == MSAsmStmtClass; 1718 } 1719 1720 child_range children() { 1721 return child_range(&Exprs[0], &Exprs[0]); 1722 } 1723}; 1724 1725class SEHExceptStmt : public Stmt { 1726 SourceLocation Loc; 1727 Stmt *Children[2]; 1728 1729 enum { FILTER_EXPR, BLOCK }; 1730 1731 SEHExceptStmt(SourceLocation Loc, 1732 Expr *FilterExpr, 1733 Stmt *Block); 1734 1735 friend class ASTReader; 1736 friend class ASTStmtReader; 1737 explicit SEHExceptStmt(EmptyShell E) : Stmt(SEHExceptStmtClass, E) { } 1738 1739public: 1740 static SEHExceptStmt* Create(ASTContext &C, 1741 SourceLocation ExceptLoc, 1742 Expr *FilterExpr, 1743 Stmt *Block); 1744 SourceRange getSourceRange() const LLVM_READONLY { 1745 return SourceRange(getExceptLoc(), getEndLoc()); 1746 } 1747 1748 SourceLocation getExceptLoc() const { return Loc; } 1749 SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); } 1750 1751 Expr *getFilterExpr() const { 1752 return reinterpret_cast<Expr*>(Children[FILTER_EXPR]); 1753 } 1754 1755 CompoundStmt *getBlock() const { 1756 return llvm::cast<CompoundStmt>(Children[BLOCK]); 1757 } 1758 1759 child_range children() { 1760 return child_range(Children,Children+2); 1761 } 1762 1763 static bool classof(const Stmt *T) { 1764 return T->getStmtClass() == SEHExceptStmtClass; 1765 } 1766 1767}; 1768 1769class SEHFinallyStmt : public Stmt { 1770 SourceLocation Loc; 1771 Stmt *Block; 1772 1773 SEHFinallyStmt(SourceLocation Loc, 1774 Stmt *Block); 1775 1776 friend class ASTReader; 1777 friend class ASTStmtReader; 1778 explicit SEHFinallyStmt(EmptyShell E) : Stmt(SEHFinallyStmtClass, E) { } 1779 1780public: 1781 static SEHFinallyStmt* Create(ASTContext &C, 1782 SourceLocation FinallyLoc, 1783 Stmt *Block); 1784 1785 SourceRange getSourceRange() const LLVM_READONLY { 1786 return SourceRange(getFinallyLoc(), getEndLoc()); 1787 } 1788 1789 SourceLocation getFinallyLoc() const { return Loc; } 1790 SourceLocation getEndLoc() const { return Block->getLocEnd(); } 1791 1792 CompoundStmt *getBlock() const { return llvm::cast<CompoundStmt>(Block); } 1793 1794 child_range children() { 1795 return child_range(&Block,&Block+1); 1796 } 1797 1798 static bool classof(const Stmt *T) { 1799 return T->getStmtClass() == SEHFinallyStmtClass; 1800 } 1801 1802}; 1803 1804class SEHTryStmt : public Stmt { 1805 bool IsCXXTry; 1806 SourceLocation TryLoc; 1807 Stmt *Children[2]; 1808 1809 enum { TRY = 0, HANDLER = 1 }; 1810 1811 SEHTryStmt(bool isCXXTry, // true if 'try' otherwise '__try' 1812 SourceLocation TryLoc, 1813 Stmt *TryBlock, 1814 Stmt *Handler); 1815 1816 friend class ASTReader; 1817 friend class ASTStmtReader; 1818 explicit SEHTryStmt(EmptyShell E) : Stmt(SEHTryStmtClass, E) { } 1819 1820public: 1821 static SEHTryStmt* Create(ASTContext &C, 1822 bool isCXXTry, 1823 SourceLocation TryLoc, 1824 Stmt *TryBlock, 1825 Stmt *Handler); 1826 1827 SourceRange getSourceRange() const LLVM_READONLY { 1828 return SourceRange(getTryLoc(), getEndLoc()); 1829 } 1830 1831 SourceLocation getTryLoc() const { return TryLoc; } 1832 SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); } 1833 1834 bool getIsCXXTry() const { return IsCXXTry; } 1835 1836 CompoundStmt* getTryBlock() const { 1837 return llvm::cast<CompoundStmt>(Children[TRY]); 1838 } 1839 1840 Stmt *getHandler() const { return Children[HANDLER]; } 1841 1842 /// Returns 0 if not defined 1843 SEHExceptStmt *getExceptHandler() const; 1844 SEHFinallyStmt *getFinallyHandler() const; 1845 1846 child_range children() { 1847 return child_range(Children,Children+2); 1848 } 1849 1850 static bool classof(const Stmt *T) { 1851 return T->getStmtClass() == SEHTryStmtClass; 1852 } 1853}; 1854 1855} // end namespace clang 1856 1857#endif 1858