Stmt.h revision 95f6190acb664b345b1395abaea84ee451740c5b
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/Basic/LLVM.h" 18#include "clang/Basic/SourceLocation.h" 19#include "clang/AST/PrettyPrinter.h" 20#include "clang/AST/StmtIterator.h" 21#include "clang/AST/DeclGroup.h" 22#include "clang/AST/Attr.h" 23#include "clang/Lex/Token.h" 24#include "llvm/ADT/SmallVector.h" 25#include "llvm/Support/Compiler.h" 26#include "llvm/Support/raw_ostream.h" 27#include <string> 28 29namespace llvm { 30 class FoldingSetNodeID; 31} 32 33namespace clang { 34 class ASTContext; 35 class Expr; 36 class Decl; 37 class ParmVarDecl; 38 class QualType; 39 class IdentifierInfo; 40 class LabelDecl; 41 class SourceManager; 42 class StringLiteral; 43 class SwitchStmt; 44 class VarDecl; 45 46 //===--------------------------------------------------------------------===// 47 // ExprIterator - Iterators for iterating over Stmt* arrays that contain 48 // only Expr*. This is needed because AST nodes use Stmt* arrays to store 49 // references to children (to be compatible with StmtIterator). 50 //===--------------------------------------------------------------------===// 51 52 class Stmt; 53 class Expr; 54 55 class ExprIterator { 56 Stmt** I; 57 public: 58 ExprIterator(Stmt** i) : I(i) {} 59 ExprIterator() : I(0) {} 60 ExprIterator& operator++() { ++I; return *this; } 61 ExprIterator operator-(size_t i) { return I-i; } 62 ExprIterator operator+(size_t i) { return I+i; } 63 Expr* operator[](size_t idx); 64 // FIXME: Verify that this will correctly return a signed distance. 65 signed operator-(const ExprIterator& R) const { return I - R.I; } 66 Expr* operator*() const; 67 Expr* operator->() const; 68 bool operator==(const ExprIterator& R) const { return I == R.I; } 69 bool operator!=(const ExprIterator& R) const { return I != R.I; } 70 bool operator>(const ExprIterator& R) const { return I > R.I; } 71 bool operator>=(const ExprIterator& R) const { return I >= R.I; } 72 }; 73 74 class ConstExprIterator { 75 const Stmt * const *I; 76 public: 77 ConstExprIterator(const Stmt * const *i) : I(i) {} 78 ConstExprIterator() : I(0) {} 79 ConstExprIterator& operator++() { ++I; return *this; } 80 ConstExprIterator operator+(size_t i) const { return I+i; } 81 ConstExprIterator operator-(size_t i) const { return I-i; } 82 const Expr * operator[](size_t idx) const; 83 signed operator-(const ConstExprIterator& R) const { return I - R.I; } 84 const Expr * operator*() const; 85 const Expr * operator->() const; 86 bool operator==(const ConstExprIterator& R) const { return I == R.I; } 87 bool operator!=(const ConstExprIterator& R) const { return I != R.I; } 88 bool operator>(const ConstExprIterator& R) const { return I > R.I; } 89 bool operator>=(const ConstExprIterator& R) const { return I >= R.I; } 90 }; 91 92//===----------------------------------------------------------------------===// 93// AST classes for statements. 94//===----------------------------------------------------------------------===// 95 96/// Stmt - This represents one statement. 97/// 98class Stmt { 99public: 100 enum StmtClass { 101 NoStmtClass = 0, 102#define STMT(CLASS, PARENT) CLASS##Class, 103#define STMT_RANGE(BASE, FIRST, LAST) \ 104 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class, 105#define LAST_STMT_RANGE(BASE, FIRST, LAST) \ 106 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class 107#define ABSTRACT_STMT(STMT) 108#include "clang/AST/StmtNodes.inc" 109 }; 110 111 // Make vanilla 'new' and 'delete' illegal for Stmts. 112protected: 113 void* operator new(size_t bytes) throw() { 114 llvm_unreachable("Stmts cannot be allocated with regular 'new'."); 115 } 116 void operator delete(void* data) throw() { 117 llvm_unreachable("Stmts cannot be released with regular 'delete'."); 118 } 119 120 class StmtBitfields { 121 friend class Stmt; 122 123 /// \brief The statement class. 124 unsigned sClass : 8; 125 }; 126 enum { NumStmtBits = 8 }; 127 128 class CompoundStmtBitfields { 129 friend class CompoundStmt; 130 unsigned : NumStmtBits; 131 132 unsigned NumStmts : 32 - NumStmtBits; 133 }; 134 135 class ExprBitfields { 136 friend class Expr; 137 friend class DeclRefExpr; // computeDependence 138 friend class InitListExpr; // ctor 139 friend class DesignatedInitExpr; // ctor 140 friend class BlockDeclRefExpr; // ctor 141 friend class ASTStmtReader; // deserialization 142 friend class CXXNewExpr; // ctor 143 friend class DependentScopeDeclRefExpr; // ctor 144 friend class CXXConstructExpr; // ctor 145 friend class CallExpr; // ctor 146 friend class OffsetOfExpr; // ctor 147 friend class ObjCMessageExpr; // ctor 148 friend class ObjCArrayLiteral; // ctor 149 friend class ObjCDictionaryLiteral; // ctor 150 friend class ShuffleVectorExpr; // ctor 151 friend class ParenListExpr; // ctor 152 friend class CXXUnresolvedConstructExpr; // ctor 153 friend class CXXDependentScopeMemberExpr; // ctor 154 friend class OverloadExpr; // ctor 155 friend class PseudoObjectExpr; // ctor 156 friend class AtomicExpr; // ctor 157 unsigned : NumStmtBits; 158 159 unsigned ValueKind : 2; 160 unsigned ObjectKind : 2; 161 unsigned TypeDependent : 1; 162 unsigned ValueDependent : 1; 163 unsigned InstantiationDependent : 1; 164 unsigned ContainsUnexpandedParameterPack : 1; 165 }; 166 enum { NumExprBits = 16 }; 167 168 class CharacterLiteralBitfields { 169 friend class CharacterLiteral; 170 unsigned : NumExprBits; 171 172 unsigned Kind : 2; 173 }; 174 175 class FloatingLiteralBitfields { 176 friend class FloatingLiteral; 177 unsigned : NumExprBits; 178 179 unsigned IsIEEE : 1; // Distinguishes between PPC128 and IEEE128. 180 unsigned IsExact : 1; 181 }; 182 183 class UnaryExprOrTypeTraitExprBitfields { 184 friend class UnaryExprOrTypeTraitExpr; 185 unsigned : NumExprBits; 186 187 unsigned Kind : 2; 188 unsigned IsType : 1; // true if operand is a type, false if an expression. 189 }; 190 191 class DeclRefExprBitfields { 192 friend class DeclRefExpr; 193 friend class ASTStmtReader; // deserialization 194 unsigned : NumExprBits; 195 196 unsigned HasQualifier : 1; 197 unsigned HasTemplateKWAndArgsInfo : 1; 198 unsigned HasFoundDecl : 1; 199 unsigned HadMultipleCandidates : 1; 200 unsigned RefersToEnclosingLocal : 1; 201 }; 202 203 class CastExprBitfields { 204 friend class CastExpr; 205 unsigned : NumExprBits; 206 207 unsigned Kind : 6; 208 unsigned BasePathSize : 32 - 6 - NumExprBits; 209 }; 210 211 class CallExprBitfields { 212 friend class CallExpr; 213 unsigned : NumExprBits; 214 215 unsigned NumPreArgs : 1; 216 }; 217 218 class ExprWithCleanupsBitfields { 219 friend class ExprWithCleanups; 220 friend class ASTStmtReader; // deserialization 221 222 unsigned : NumExprBits; 223 224 unsigned NumObjects : 32 - NumExprBits; 225 }; 226 227 class PseudoObjectExprBitfields { 228 friend class PseudoObjectExpr; 229 friend class ASTStmtReader; // deserialization 230 231 unsigned : NumExprBits; 232 233 // These don't need to be particularly wide, because they're 234 // strictly limited by the forms of expressions we permit. 235 unsigned NumSubExprs : 8; 236 unsigned ResultIndex : 32 - 8 - NumExprBits; 237 }; 238 239 class ObjCIndirectCopyRestoreExprBitfields { 240 friend class ObjCIndirectCopyRestoreExpr; 241 unsigned : NumExprBits; 242 243 unsigned ShouldCopy : 1; 244 }; 245 246 class InitListExprBitfields { 247 friend class InitListExpr; 248 249 unsigned : NumExprBits; 250 251 /// Whether this initializer list originally had a GNU array-range 252 /// designator in it. This is a temporary marker used by CodeGen. 253 unsigned HadArrayRangeDesignator : 1; 254 255 /// Whether this initializer list initializes a std::initializer_list 256 /// object. 257 unsigned InitializesStdInitializerList : 1; 258 }; 259 260 class TypeTraitExprBitfields { 261 friend class TypeTraitExpr; 262 friend class ASTStmtReader; 263 friend class ASTStmtWriter; 264 265 unsigned : NumExprBits; 266 267 /// \brief The kind of type trait, which is a value of a TypeTrait enumerator. 268 unsigned Kind : 8; 269 270 /// \brief If this expression is not value-dependent, this indicates whether 271 /// the trait evaluated true or false. 272 unsigned Value : 1; 273 274 /// \brief The number of arguments to this type trait. 275 unsigned NumArgs : 32 - 8 - 1 - NumExprBits; 276 }; 277 278 union { 279 // FIXME: this is wasteful on 64-bit platforms. 280 void *Aligner; 281 282 StmtBitfields StmtBits; 283 CompoundStmtBitfields CompoundStmtBits; 284 ExprBitfields ExprBits; 285 CharacterLiteralBitfields CharacterLiteralBits; 286 FloatingLiteralBitfields FloatingLiteralBits; 287 UnaryExprOrTypeTraitExprBitfields UnaryExprOrTypeTraitExprBits; 288 DeclRefExprBitfields DeclRefExprBits; 289 CastExprBitfields CastExprBits; 290 CallExprBitfields CallExprBits; 291 ExprWithCleanupsBitfields ExprWithCleanupsBits; 292 PseudoObjectExprBitfields PseudoObjectExprBits; 293 ObjCIndirectCopyRestoreExprBitfields ObjCIndirectCopyRestoreExprBits; 294 InitListExprBitfields InitListExprBits; 295 TypeTraitExprBitfields TypeTraitExprBits; 296 }; 297 298 friend class ASTStmtReader; 299 friend class ASTStmtWriter; 300 301public: 302 // Only allow allocation of Stmts using the allocator in ASTContext 303 // or by doing a placement new. 304 void* operator new(size_t bytes, ASTContext& C, 305 unsigned alignment = 8) throw() { 306 return ::operator new(bytes, C, alignment); 307 } 308 309 void* operator new(size_t bytes, ASTContext* C, 310 unsigned alignment = 8) throw() { 311 return ::operator new(bytes, *C, alignment); 312 } 313 314 void* operator new(size_t bytes, void* mem) throw() { 315 return mem; 316 } 317 318 void operator delete(void*, ASTContext&, unsigned) throw() { } 319 void operator delete(void*, ASTContext*, unsigned) throw() { } 320 void operator delete(void*, std::size_t) throw() { } 321 void operator delete(void*, void*) throw() { } 322 323public: 324 /// \brief A placeholder type used to construct an empty shell of a 325 /// type, that will be filled in later (e.g., by some 326 /// de-serialization). 327 struct EmptyShell { }; 328 329private: 330 /// \brief Whether statistic collection is enabled. 331 static bool StatisticsEnabled; 332 333protected: 334 /// \brief Construct an empty statement. 335 explicit Stmt(StmtClass SC, EmptyShell) { 336 StmtBits.sClass = SC; 337 if (StatisticsEnabled) Stmt::addStmtClass(SC); 338 } 339 340public: 341 Stmt(StmtClass SC) { 342 StmtBits.sClass = SC; 343 if (StatisticsEnabled) Stmt::addStmtClass(SC); 344 } 345 346 StmtClass getStmtClass() const { 347 return static_cast<StmtClass>(StmtBits.sClass); 348 } 349 const char *getStmtClassName() const; 350 351 /// SourceLocation tokens are not useful in isolation - they are low level 352 /// value objects created/interpreted by SourceManager. We assume AST 353 /// clients will have a pointer to the respective SourceManager. 354 SourceRange getSourceRange() const LLVM_READONLY; 355 SourceLocation getLocStart() const LLVM_READONLY; 356 SourceLocation getLocEnd() const LLVM_READONLY; 357 358 // global temp stats (until we have a per-module visitor) 359 static void addStmtClass(const StmtClass s); 360 static void EnableStatistics(); 361 static void PrintStats(); 362 363 /// \brief Dumps the specified AST fragment and all subtrees to 364 /// \c llvm::errs(). 365 LLVM_ATTRIBUTE_USED void dump() const; 366 LLVM_ATTRIBUTE_USED void dump(SourceManager &SM) const; 367 void dump(raw_ostream &OS, SourceManager &SM) const; 368 369 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 370 /// back to its original source language syntax. 371 void dumpPretty(ASTContext &Context) const; 372 void printPretty(raw_ostream &OS, PrinterHelper *Helper, 373 const PrintingPolicy &Policy, 374 unsigned Indentation = 0) const; 375 376 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 377 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 378 void viewAST() const; 379 380 /// Skip past any implicit AST nodes which might surround this 381 /// statement, such as ExprWithCleanups or ImplicitCastExpr nodes. 382 Stmt *IgnoreImplicit(); 383 384 const Stmt *stripLabelLikeStatements() const; 385 Stmt *stripLabelLikeStatements() { 386 return const_cast<Stmt*>( 387 const_cast<const Stmt*>(this)->stripLabelLikeStatements()); 388 } 389 390 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 391 /// contain implicit control-flow in the order their subexpressions 392 /// are evaluated. This predicate returns true if this statement has 393 /// such implicit control-flow. Such statements are also specially handled 394 /// within CFGs. 395 bool hasImplicitControlFlow() const; 396 397 /// Child Iterators: All subclasses must implement 'children' 398 /// to permit easy iteration over the substatements/subexpessions of an 399 /// AST node. This permits easy iteration over all nodes in the AST. 400 typedef StmtIterator child_iterator; 401 typedef ConstStmtIterator const_child_iterator; 402 403 typedef StmtRange child_range; 404 typedef ConstStmtRange const_child_range; 405 406 child_range children(); 407 const_child_range children() const { 408 return const_cast<Stmt*>(this)->children(); 409 } 410 411 child_iterator child_begin() { return children().first; } 412 child_iterator child_end() { return children().second; } 413 414 const_child_iterator child_begin() const { return children().first; } 415 const_child_iterator child_end() const { return children().second; } 416 417 /// \brief Produce a unique representation of the given statement. 418 /// 419 /// \param ID once the profiling operation is complete, will contain 420 /// the unique representation of the given statement. 421 /// 422 /// \param Context the AST context in which the statement resides 423 /// 424 /// \param Canonical whether the profile should be based on the canonical 425 /// representation of this statement (e.g., where non-type template 426 /// parameters are identified by index/level rather than their 427 /// declaration pointers) or the exact representation of the statement as 428 /// written in the source. 429 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 430 bool Canonical) const; 431}; 432 433/// DeclStmt - Adaptor class for mixing declarations with statements and 434/// expressions. For example, CompoundStmt mixes statements, expressions 435/// and declarations (variables, types). Another example is ForStmt, where 436/// the first statement can be an expression or a declaration. 437/// 438class DeclStmt : public Stmt { 439 DeclGroupRef DG; 440 SourceLocation StartLoc, EndLoc; 441 442public: 443 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 444 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 445 StartLoc(startLoc), EndLoc(endLoc) {} 446 447 /// \brief Build an empty declaration statement. 448 explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { } 449 450 /// isSingleDecl - This method returns true if this DeclStmt refers 451 /// to a single Decl. 452 bool isSingleDecl() const { 453 return DG.isSingleDecl(); 454 } 455 456 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 457 Decl *getSingleDecl() { return DG.getSingleDecl(); } 458 459 const DeclGroupRef getDeclGroup() const { return DG; } 460 DeclGroupRef getDeclGroup() { return DG; } 461 void setDeclGroup(DeclGroupRef DGR) { DG = DGR; } 462 463 SourceLocation getStartLoc() const { return StartLoc; } 464 void setStartLoc(SourceLocation L) { StartLoc = L; } 465 SourceLocation getEndLoc() const { return EndLoc; } 466 void setEndLoc(SourceLocation L) { EndLoc = L; } 467 468 SourceRange getSourceRange() const LLVM_READONLY { 469 return SourceRange(StartLoc, EndLoc); 470 } 471 472 static bool classof(const Stmt *T) { 473 return T->getStmtClass() == DeclStmtClass; 474 } 475 476 // Iterators over subexpressions. 477 child_range children() { 478 return child_range(child_iterator(DG.begin(), DG.end()), 479 child_iterator(DG.end(), DG.end())); 480 } 481 482 typedef DeclGroupRef::iterator decl_iterator; 483 typedef DeclGroupRef::const_iterator const_decl_iterator; 484 485 decl_iterator decl_begin() { return DG.begin(); } 486 decl_iterator decl_end() { return DG.end(); } 487 const_decl_iterator decl_begin() const { return DG.begin(); } 488 const_decl_iterator decl_end() const { return DG.end(); } 489 490 typedef std::reverse_iterator<decl_iterator> reverse_decl_iterator; 491 reverse_decl_iterator decl_rbegin() { 492 return reverse_decl_iterator(decl_end()); 493 } 494 reverse_decl_iterator decl_rend() { 495 return reverse_decl_iterator(decl_begin()); 496 } 497}; 498 499/// NullStmt - This is the null statement ";": C99 6.8.3p3. 500/// 501class NullStmt : public Stmt { 502 SourceLocation SemiLoc; 503 504 /// \brief True if the null statement was preceded by an empty macro, e.g: 505 /// @code 506 /// #define CALL(x) 507 /// CALL(0); 508 /// @endcode 509 bool HasLeadingEmptyMacro; 510public: 511 NullStmt(SourceLocation L, bool hasLeadingEmptyMacro = false) 512 : Stmt(NullStmtClass), SemiLoc(L), 513 HasLeadingEmptyMacro(hasLeadingEmptyMacro) {} 514 515 /// \brief Build an empty null statement. 516 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty), 517 HasLeadingEmptyMacro(false) { } 518 519 SourceLocation getSemiLoc() const { return SemiLoc; } 520 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 521 522 bool hasLeadingEmptyMacro() const { return HasLeadingEmptyMacro; } 523 524 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(SemiLoc); } 525 526 static bool classof(const Stmt *T) { 527 return T->getStmtClass() == NullStmtClass; 528 } 529 530 child_range children() { return child_range(); } 531 532 friend class ASTStmtReader; 533 friend class ASTStmtWriter; 534}; 535 536/// CompoundStmt - This represents a group of statements like { stmt stmt }. 537/// 538class CompoundStmt : public Stmt { 539 Stmt** Body; 540 SourceLocation LBracLoc, RBracLoc; 541public: 542 CompoundStmt(ASTContext &C, Stmt **StmtStart, unsigned NumStmts, 543 SourceLocation LB, SourceLocation RB); 544 545 // \brief Build an empty compound statment with a location. 546 explicit CompoundStmt(SourceLocation Loc) 547 : Stmt(CompoundStmtClass), Body(0), LBracLoc(Loc), RBracLoc(Loc) { 548 CompoundStmtBits.NumStmts = 0; 549 } 550 551 // \brief Build an empty compound statement. 552 explicit CompoundStmt(EmptyShell Empty) 553 : Stmt(CompoundStmtClass, Empty), Body(0) { 554 CompoundStmtBits.NumStmts = 0; 555 } 556 557 void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts); 558 559 bool body_empty() const { return CompoundStmtBits.NumStmts == 0; } 560 unsigned size() const { return CompoundStmtBits.NumStmts; } 561 562 typedef Stmt** body_iterator; 563 body_iterator body_begin() { return Body; } 564 body_iterator body_end() { return Body + size(); } 565 Stmt *body_back() { return !body_empty() ? Body[size()-1] : 0; } 566 567 void setLastStmt(Stmt *S) { 568 assert(!body_empty() && "setLastStmt"); 569 Body[size()-1] = S; 570 } 571 572 typedef Stmt* const * const_body_iterator; 573 const_body_iterator body_begin() const { return Body; } 574 const_body_iterator body_end() const { return Body + size(); } 575 const Stmt *body_back() const { return !body_empty() ? Body[size()-1] : 0; } 576 577 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 578 reverse_body_iterator body_rbegin() { 579 return reverse_body_iterator(body_end()); 580 } 581 reverse_body_iterator body_rend() { 582 return reverse_body_iterator(body_begin()); 583 } 584 585 typedef std::reverse_iterator<const_body_iterator> 586 const_reverse_body_iterator; 587 588 const_reverse_body_iterator body_rbegin() const { 589 return const_reverse_body_iterator(body_end()); 590 } 591 592 const_reverse_body_iterator body_rend() const { 593 return const_reverse_body_iterator(body_begin()); 594 } 595 596 SourceRange getSourceRange() const LLVM_READONLY { 597 return SourceRange(LBracLoc, RBracLoc); 598 } 599 600 SourceLocation getLBracLoc() const { return LBracLoc; } 601 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 602 SourceLocation getRBracLoc() const { return RBracLoc; } 603 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 604 605 static bool classof(const Stmt *T) { 606 return T->getStmtClass() == CompoundStmtClass; 607 } 608 609 // Iterators 610 child_range children() { 611 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 612 } 613 614 const_child_range children() const { 615 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 616 } 617}; 618 619// SwitchCase is the base class for CaseStmt and DefaultStmt, 620class SwitchCase : public Stmt { 621protected: 622 // A pointer to the following CaseStmt or DefaultStmt class, 623 // used by SwitchStmt. 624 SwitchCase *NextSwitchCase; 625 626 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 627 628public: 629 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 630 631 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 632 633 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 634 635 Stmt *getSubStmt(); 636 const Stmt *getSubStmt() const { 637 return const_cast<SwitchCase*>(this)->getSubStmt(); 638 } 639 640 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); } 641 642 static bool classof(const Stmt *T) { 643 return T->getStmtClass() == CaseStmtClass || 644 T->getStmtClass() == DefaultStmtClass; 645 } 646}; 647 648class CaseStmt : public SwitchCase { 649 enum { LHS, RHS, SUBSTMT, END_EXPR }; 650 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 651 // GNU "case 1 ... 4" extension 652 SourceLocation CaseLoc; 653 SourceLocation EllipsisLoc; 654 SourceLocation ColonLoc; 655public: 656 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc, 657 SourceLocation ellipsisLoc, SourceLocation colonLoc) 658 : SwitchCase(CaseStmtClass) { 659 SubExprs[SUBSTMT] = 0; 660 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 661 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 662 CaseLoc = caseLoc; 663 EllipsisLoc = ellipsisLoc; 664 ColonLoc = colonLoc; 665 } 666 667 /// \brief Build an empty switch case statement. 668 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { } 669 670 SourceLocation getCaseLoc() const { return CaseLoc; } 671 void setCaseLoc(SourceLocation L) { CaseLoc = L; } 672 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 673 void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; } 674 SourceLocation getColonLoc() const { return ColonLoc; } 675 void setColonLoc(SourceLocation L) { ColonLoc = L; } 676 677 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 678 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 679 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 680 681 const Expr *getLHS() const { 682 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 683 } 684 const Expr *getRHS() const { 685 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 686 } 687 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 688 689 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 690 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 691 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 692 693 694 SourceRange getSourceRange() const LLVM_READONLY { 695 // Handle deeply nested case statements with iteration instead of recursion. 696 const CaseStmt *CS = this; 697 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 698 CS = CS2; 699 700 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 701 } 702 static bool classof(const Stmt *T) { 703 return T->getStmtClass() == CaseStmtClass; 704 } 705 706 // Iterators 707 child_range children() { 708 return child_range(&SubExprs[0], &SubExprs[END_EXPR]); 709 } 710}; 711 712class DefaultStmt : public SwitchCase { 713 Stmt* SubStmt; 714 SourceLocation DefaultLoc; 715 SourceLocation ColonLoc; 716public: 717 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 718 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL), 719 ColonLoc(CL) {} 720 721 /// \brief Build an empty default statement. 722 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 723 724 Stmt *getSubStmt() { return SubStmt; } 725 const Stmt *getSubStmt() const { return SubStmt; } 726 void setSubStmt(Stmt *S) { SubStmt = S; } 727 728 SourceLocation getDefaultLoc() const { return DefaultLoc; } 729 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 730 SourceLocation getColonLoc() const { return ColonLoc; } 731 void setColonLoc(SourceLocation L) { ColonLoc = L; } 732 733 SourceRange getSourceRange() const LLVM_READONLY { 734 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 735 } 736 static bool classof(const Stmt *T) { 737 return T->getStmtClass() == DefaultStmtClass; 738 } 739 740 // Iterators 741 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 742}; 743 744 745/// LabelStmt - Represents a label, which has a substatement. For example: 746/// foo: return; 747/// 748class LabelStmt : public Stmt { 749 LabelDecl *TheDecl; 750 Stmt *SubStmt; 751 SourceLocation IdentLoc; 752public: 753 LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt) 754 : Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) { 755 } 756 757 // \brief Build an empty label statement. 758 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 759 760 SourceLocation getIdentLoc() const { return IdentLoc; } 761 LabelDecl *getDecl() const { return TheDecl; } 762 void setDecl(LabelDecl *D) { TheDecl = D; } 763 const char *getName() const; 764 Stmt *getSubStmt() { return SubStmt; } 765 const Stmt *getSubStmt() const { return SubStmt; } 766 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 767 void setSubStmt(Stmt *SS) { SubStmt = SS; } 768 769 SourceRange getSourceRange() const LLVM_READONLY { 770 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 771 } 772 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 773 774 static bool classof(const Stmt *T) { 775 return T->getStmtClass() == LabelStmtClass; 776 } 777}; 778 779 780/// \brief Represents an attribute applied to a statement. 781/// 782/// Represents an attribute applied to a statement. For example: 783/// [[omp::for(...)]] for (...) { ... } 784/// 785class AttributedStmt : public Stmt { 786 Stmt *SubStmt; 787 SourceLocation AttrLoc; 788 unsigned NumAttrs; 789 const Attr *Attrs[1]; 790 791 friend class ASTStmtReader; 792 793 AttributedStmt(SourceLocation Loc, ArrayRef<const Attr*> Attrs, Stmt *SubStmt) 794 : Stmt(AttributedStmtClass), SubStmt(SubStmt), AttrLoc(Loc), 795 NumAttrs(Attrs.size()) { 796 memcpy(this->Attrs, Attrs.data(), Attrs.size() * sizeof(Attr*)); 797 } 798 799 explicit AttributedStmt(EmptyShell Empty, unsigned NumAttrs) 800 : Stmt(AttributedStmtClass, Empty), NumAttrs(NumAttrs) { 801 memset(Attrs, 0, NumAttrs * sizeof(Attr*)); 802 } 803 804public: 805 static AttributedStmt *Create(ASTContext &C, SourceLocation Loc, 806 ArrayRef<const Attr*> Attrs, Stmt *SubStmt); 807 // \brief Build an empty attributed statement. 808 static AttributedStmt *CreateEmpty(ASTContext &C, unsigned NumAttrs); 809 810 SourceLocation getAttrLoc() const { return AttrLoc; } 811 ArrayRef<const Attr*> getAttrs() const { 812 return ArrayRef<const Attr*>(Attrs, NumAttrs); 813 } 814 Stmt *getSubStmt() { return SubStmt; } 815 const Stmt *getSubStmt() const { return SubStmt; } 816 817 SourceRange getSourceRange() const LLVM_READONLY { 818 return SourceRange(AttrLoc, SubStmt->getLocEnd()); 819 } 820 child_range children() { return child_range(&SubStmt, &SubStmt + 1); } 821 822 static bool classof(const Stmt *T) { 823 return T->getStmtClass() == AttributedStmtClass; 824 } 825}; 826 827 828/// IfStmt - This represents an if/then/else. 829/// 830class IfStmt : public Stmt { 831 enum { VAR, COND, THEN, ELSE, END_EXPR }; 832 Stmt* SubExprs[END_EXPR]; 833 834 SourceLocation IfLoc; 835 SourceLocation ElseLoc; 836 837public: 838 IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond, 839 Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0); 840 841 /// \brief Build an empty if/then/else statement 842 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 843 844 /// \brief Retrieve the variable declared in this "if" statement, if any. 845 /// 846 /// In the following example, "x" is the condition variable. 847 /// \code 848 /// if (int x = foo()) { 849 /// printf("x is %d", x); 850 /// } 851 /// \endcode 852 VarDecl *getConditionVariable() const; 853 void setConditionVariable(ASTContext &C, VarDecl *V); 854 855 /// If this IfStmt has a condition variable, return the faux DeclStmt 856 /// associated with the creation of that condition variable. 857 const DeclStmt *getConditionVariableDeclStmt() const { 858 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 859 } 860 861 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 862 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 863 const Stmt *getThen() const { return SubExprs[THEN]; } 864 void setThen(Stmt *S) { SubExprs[THEN] = S; } 865 const Stmt *getElse() const { return SubExprs[ELSE]; } 866 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 867 868 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 869 Stmt *getThen() { return SubExprs[THEN]; } 870 Stmt *getElse() { return SubExprs[ELSE]; } 871 872 SourceLocation getIfLoc() const { return IfLoc; } 873 void setIfLoc(SourceLocation L) { IfLoc = L; } 874 SourceLocation getElseLoc() const { return ElseLoc; } 875 void setElseLoc(SourceLocation L) { ElseLoc = L; } 876 877 SourceRange getSourceRange() const LLVM_READONLY { 878 if (SubExprs[ELSE]) 879 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 880 else 881 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 882 } 883 884 // Iterators over subexpressions. The iterators will include iterating 885 // over the initialization expression referenced by the condition variable. 886 child_range children() { 887 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 888 } 889 890 static bool classof(const Stmt *T) { 891 return T->getStmtClass() == IfStmtClass; 892 } 893}; 894 895/// SwitchStmt - This represents a 'switch' stmt. 896/// 897class SwitchStmt : public Stmt { 898 enum { VAR, COND, BODY, END_EXPR }; 899 Stmt* SubExprs[END_EXPR]; 900 // This points to a linked list of case and default statements. 901 SwitchCase *FirstCase; 902 SourceLocation SwitchLoc; 903 904 /// If the SwitchStmt is a switch on an enum value, this records whether 905 /// all the enum values were covered by CaseStmts. This value is meant to 906 /// be a hint for possible clients. 907 unsigned AllEnumCasesCovered : 1; 908 909public: 910 SwitchStmt(ASTContext &C, VarDecl *Var, Expr *cond); 911 912 /// \brief Build a empty switch statement. 913 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 914 915 /// \brief Retrieve the variable declared in this "switch" statement, if any. 916 /// 917 /// In the following example, "x" is the condition variable. 918 /// \code 919 /// switch (int x = foo()) { 920 /// case 0: break; 921 /// // ... 922 /// } 923 /// \endcode 924 VarDecl *getConditionVariable() const; 925 void setConditionVariable(ASTContext &C, VarDecl *V); 926 927 /// If this SwitchStmt has a condition variable, return the faux DeclStmt 928 /// associated with the creation of that condition variable. 929 const DeclStmt *getConditionVariableDeclStmt() const { 930 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 931 } 932 933 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 934 const Stmt *getBody() const { return SubExprs[BODY]; } 935 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 936 937 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 938 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 939 Stmt *getBody() { return SubExprs[BODY]; } 940 void setBody(Stmt *S) { SubExprs[BODY] = S; } 941 SwitchCase *getSwitchCaseList() { return FirstCase; } 942 943 /// \brief Set the case list for this switch statement. 944 /// 945 /// The caller is responsible for incrementing the retain counts on 946 /// all of the SwitchCase statements in this list. 947 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 948 949 SourceLocation getSwitchLoc() const { return SwitchLoc; } 950 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 951 952 void setBody(Stmt *S, SourceLocation SL) { 953 SubExprs[BODY] = S; 954 SwitchLoc = SL; 955 } 956 void addSwitchCase(SwitchCase *SC) { 957 assert(!SC->getNextSwitchCase() 958 && "case/default already added to a switch"); 959 SC->setNextSwitchCase(FirstCase); 960 FirstCase = SC; 961 } 962 963 /// Set a flag in the SwitchStmt indicating that if the 'switch (X)' is a 964 /// switch over an enum value then all cases have been explicitly covered. 965 void setAllEnumCasesCovered() { 966 AllEnumCasesCovered = 1; 967 } 968 969 /// Returns true if the SwitchStmt is a switch of an enum value and all cases 970 /// have been explicitly covered. 971 bool isAllEnumCasesCovered() const { 972 return (bool) AllEnumCasesCovered; 973 } 974 975 SourceRange getSourceRange() const LLVM_READONLY { 976 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 977 } 978 // Iterators 979 child_range children() { 980 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 981 } 982 983 static bool classof(const Stmt *T) { 984 return T->getStmtClass() == SwitchStmtClass; 985 } 986}; 987 988 989/// WhileStmt - This represents a 'while' stmt. 990/// 991class WhileStmt : public Stmt { 992 enum { VAR, COND, BODY, END_EXPR }; 993 Stmt* SubExprs[END_EXPR]; 994 SourceLocation WhileLoc; 995public: 996 WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body, 997 SourceLocation WL); 998 999 /// \brief Build an empty while statement. 1000 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 1001 1002 /// \brief Retrieve the variable declared in this "while" statement, if any. 1003 /// 1004 /// In the following example, "x" is the condition variable. 1005 /// \code 1006 /// while (int x = random()) { 1007 /// // ... 1008 /// } 1009 /// \endcode 1010 VarDecl *getConditionVariable() const; 1011 void setConditionVariable(ASTContext &C, VarDecl *V); 1012 1013 /// If this WhileStmt has a condition variable, return the faux DeclStmt 1014 /// associated with the creation of that condition variable. 1015 const DeclStmt *getConditionVariableDeclStmt() const { 1016 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 1017 } 1018 1019 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1020 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1021 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1022 Stmt *getBody() { return SubExprs[BODY]; } 1023 const Stmt *getBody() const { return SubExprs[BODY]; } 1024 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1025 1026 SourceLocation getWhileLoc() const { return WhileLoc; } 1027 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1028 1029 SourceRange getSourceRange() const LLVM_READONLY { 1030 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 1031 } 1032 static bool classof(const Stmt *T) { 1033 return T->getStmtClass() == WhileStmtClass; 1034 } 1035 1036 // Iterators 1037 child_range children() { 1038 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1039 } 1040}; 1041 1042/// DoStmt - This represents a 'do/while' stmt. 1043/// 1044class DoStmt : public Stmt { 1045 enum { BODY, COND, END_EXPR }; 1046 Stmt* SubExprs[END_EXPR]; 1047 SourceLocation DoLoc; 1048 SourceLocation WhileLoc; 1049 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 1050 1051public: 1052 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 1053 SourceLocation RP) 1054 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 1055 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 1056 SubExprs[BODY] = body; 1057 } 1058 1059 /// \brief Build an empty do-while statement. 1060 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 1061 1062 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1063 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1064 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1065 Stmt *getBody() { return SubExprs[BODY]; } 1066 const Stmt *getBody() const { return SubExprs[BODY]; } 1067 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1068 1069 SourceLocation getDoLoc() const { return DoLoc; } 1070 void setDoLoc(SourceLocation L) { DoLoc = L; } 1071 SourceLocation getWhileLoc() const { return WhileLoc; } 1072 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1073 1074 SourceLocation getRParenLoc() const { return RParenLoc; } 1075 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1076 1077 SourceRange getSourceRange() const LLVM_READONLY { 1078 return SourceRange(DoLoc, RParenLoc); 1079 } 1080 static bool classof(const Stmt *T) { 1081 return T->getStmtClass() == DoStmtClass; 1082 } 1083 1084 // Iterators 1085 child_range children() { 1086 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1087 } 1088}; 1089 1090 1091/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 1092/// the init/cond/inc parts of the ForStmt will be null if they were not 1093/// specified in the source. 1094/// 1095class ForStmt : public Stmt { 1096 enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR }; 1097 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 1098 SourceLocation ForLoc; 1099 SourceLocation LParenLoc, RParenLoc; 1100 1101public: 1102 ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc, 1103 Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP); 1104 1105 /// \brief Build an empty for statement. 1106 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 1107 1108 Stmt *getInit() { return SubExprs[INIT]; } 1109 1110 /// \brief Retrieve the variable declared in this "for" statement, if any. 1111 /// 1112 /// In the following example, "y" is the condition variable. 1113 /// \code 1114 /// for (int x = random(); int y = mangle(x); ++x) { 1115 /// // ... 1116 /// } 1117 /// \endcode 1118 VarDecl *getConditionVariable() const; 1119 void setConditionVariable(ASTContext &C, VarDecl *V); 1120 1121 /// If this ForStmt has a condition variable, return the faux DeclStmt 1122 /// associated with the creation of that condition variable. 1123 const DeclStmt *getConditionVariableDeclStmt() const { 1124 return reinterpret_cast<DeclStmt*>(SubExprs[CONDVAR]); 1125 } 1126 1127 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1128 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1129 Stmt *getBody() { return SubExprs[BODY]; } 1130 1131 const Stmt *getInit() const { return SubExprs[INIT]; } 1132 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1133 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1134 const Stmt *getBody() const { return SubExprs[BODY]; } 1135 1136 void setInit(Stmt *S) { SubExprs[INIT] = S; } 1137 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1138 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 1139 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1140 1141 SourceLocation getForLoc() const { return ForLoc; } 1142 void setForLoc(SourceLocation L) { ForLoc = L; } 1143 SourceLocation getLParenLoc() const { return LParenLoc; } 1144 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1145 SourceLocation getRParenLoc() const { return RParenLoc; } 1146 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1147 1148 SourceRange getSourceRange() const LLVM_READONLY { 1149 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 1150 } 1151 static bool classof(const Stmt *T) { 1152 return T->getStmtClass() == ForStmtClass; 1153 } 1154 1155 // Iterators 1156 child_range children() { 1157 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1158 } 1159}; 1160 1161/// GotoStmt - This represents a direct goto. 1162/// 1163class GotoStmt : public Stmt { 1164 LabelDecl *Label; 1165 SourceLocation GotoLoc; 1166 SourceLocation LabelLoc; 1167public: 1168 GotoStmt(LabelDecl *label, SourceLocation GL, SourceLocation LL) 1169 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 1170 1171 /// \brief Build an empty goto statement. 1172 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 1173 1174 LabelDecl *getLabel() const { return Label; } 1175 void setLabel(LabelDecl *D) { Label = D; } 1176 1177 SourceLocation getGotoLoc() const { return GotoLoc; } 1178 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1179 SourceLocation getLabelLoc() const { return LabelLoc; } 1180 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 1181 1182 SourceRange getSourceRange() const LLVM_READONLY { 1183 return SourceRange(GotoLoc, LabelLoc); 1184 } 1185 static bool classof(const Stmt *T) { 1186 return T->getStmtClass() == GotoStmtClass; 1187 } 1188 1189 // Iterators 1190 child_range children() { return child_range(); } 1191}; 1192 1193/// IndirectGotoStmt - This represents an indirect goto. 1194/// 1195class IndirectGotoStmt : public Stmt { 1196 SourceLocation GotoLoc; 1197 SourceLocation StarLoc; 1198 Stmt *Target; 1199public: 1200 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 1201 Expr *target) 1202 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 1203 Target((Stmt*)target) {} 1204 1205 /// \brief Build an empty indirect goto statement. 1206 explicit IndirectGotoStmt(EmptyShell Empty) 1207 : Stmt(IndirectGotoStmtClass, Empty) { } 1208 1209 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1210 SourceLocation getGotoLoc() const { return GotoLoc; } 1211 void setStarLoc(SourceLocation L) { StarLoc = L; } 1212 SourceLocation getStarLoc() const { return StarLoc; } 1213 1214 Expr *getTarget() { return reinterpret_cast<Expr*>(Target); } 1215 const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);} 1216 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 1217 1218 /// getConstantTarget - Returns the fixed target of this indirect 1219 /// goto, if one exists. 1220 LabelDecl *getConstantTarget(); 1221 const LabelDecl *getConstantTarget() const { 1222 return const_cast<IndirectGotoStmt*>(this)->getConstantTarget(); 1223 } 1224 1225 SourceRange getSourceRange() const LLVM_READONLY { 1226 return SourceRange(GotoLoc, Target->getLocEnd()); 1227 } 1228 1229 static bool classof(const Stmt *T) { 1230 return T->getStmtClass() == IndirectGotoStmtClass; 1231 } 1232 1233 // Iterators 1234 child_range children() { return child_range(&Target, &Target+1); } 1235}; 1236 1237 1238/// ContinueStmt - This represents a continue. 1239/// 1240class ContinueStmt : public Stmt { 1241 SourceLocation ContinueLoc; 1242public: 1243 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 1244 1245 /// \brief Build an empty continue statement. 1246 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 1247 1248 SourceLocation getContinueLoc() const { return ContinueLoc; } 1249 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 1250 1251 SourceRange getSourceRange() const LLVM_READONLY { 1252 return SourceRange(ContinueLoc); 1253 } 1254 1255 static bool classof(const Stmt *T) { 1256 return T->getStmtClass() == ContinueStmtClass; 1257 } 1258 1259 // Iterators 1260 child_range children() { return child_range(); } 1261}; 1262 1263/// BreakStmt - This represents a break. 1264/// 1265class BreakStmt : public Stmt { 1266 SourceLocation BreakLoc; 1267public: 1268 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 1269 1270 /// \brief Build an empty break statement. 1271 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 1272 1273 SourceLocation getBreakLoc() const { return BreakLoc; } 1274 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 1275 1276 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(BreakLoc); } 1277 1278 static bool classof(const Stmt *T) { 1279 return T->getStmtClass() == BreakStmtClass; 1280 } 1281 1282 // Iterators 1283 child_range children() { return child_range(); } 1284}; 1285 1286 1287/// ReturnStmt - This represents a return, optionally of an expression: 1288/// return; 1289/// return 4; 1290/// 1291/// Note that GCC allows return with no argument in a function declared to 1292/// return a value, and it allows returning a value in functions declared to 1293/// return void. We explicitly model this in the AST, which means you can't 1294/// depend on the return type of the function and the presence of an argument. 1295/// 1296class ReturnStmt : public Stmt { 1297 Stmt *RetExpr; 1298 SourceLocation RetLoc; 1299 const VarDecl *NRVOCandidate; 1300 1301public: 1302 ReturnStmt(SourceLocation RL) 1303 : Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { } 1304 1305 ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate) 1306 : Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL), 1307 NRVOCandidate(NRVOCandidate) {} 1308 1309 /// \brief Build an empty return expression. 1310 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1311 1312 const Expr *getRetValue() const; 1313 Expr *getRetValue(); 1314 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1315 1316 SourceLocation getReturnLoc() const { return RetLoc; } 1317 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1318 1319 /// \brief Retrieve the variable that might be used for the named return 1320 /// value optimization. 1321 /// 1322 /// The optimization itself can only be performed if the variable is 1323 /// also marked as an NRVO object. 1324 const VarDecl *getNRVOCandidate() const { return NRVOCandidate; } 1325 void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; } 1326 1327 SourceRange getSourceRange() const LLVM_READONLY; 1328 1329 static bool classof(const Stmt *T) { 1330 return T->getStmtClass() == ReturnStmtClass; 1331 } 1332 1333 // Iterators 1334 child_range children() { 1335 if (RetExpr) return child_range(&RetExpr, &RetExpr+1); 1336 return child_range(); 1337 } 1338}; 1339 1340/// AsmStmt is the base class for GCCAsmStmt and MSAsmStmt. 1341/// 1342class AsmStmt : public Stmt { 1343protected: 1344 SourceLocation AsmLoc; 1345 /// \brief True if the assembly statement does not have any input or output 1346 /// operands. 1347 bool IsSimple; 1348 1349 /// \brief If true, treat this inline assembly as having side effects. 1350 /// This assembly statement should not be optimized, deleted or moved. 1351 bool IsVolatile; 1352 1353 unsigned NumOutputs; 1354 unsigned NumInputs; 1355 unsigned NumClobbers; 1356 1357 IdentifierInfo **Names; 1358 Stmt **Exprs; 1359 1360 AsmStmt(StmtClass SC, SourceLocation asmloc, bool issimple, bool isvolatile, 1361 unsigned numoutputs, unsigned numinputs, unsigned numclobbers) : 1362 Stmt (SC), AsmLoc(asmloc), IsSimple(issimple), IsVolatile(isvolatile), 1363 NumOutputs(numoutputs), NumInputs(numinputs), NumClobbers(numclobbers) { } 1364 1365public: 1366 /// \brief Build an empty inline-assembly statement. 1367 explicit AsmStmt(StmtClass SC, EmptyShell Empty) : 1368 Stmt(SC, Empty), Names(0), Exprs(0) { } 1369 1370 SourceLocation getAsmLoc() const { return AsmLoc; } 1371 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1372 1373 bool isSimple() const { return IsSimple; } 1374 void setSimple(bool V) { IsSimple = V; } 1375 1376 bool isVolatile() const { return IsVolatile; } 1377 void setVolatile(bool V) { IsVolatile = V; } 1378 1379 SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); } 1380 1381 //===--- Asm String Analysis ---===// 1382 1383 /// Assemble final IR asm string. 1384 std::string generateAsmString(ASTContext &C) const; 1385 1386 //===--- Output operands ---===// 1387 1388 unsigned getNumOutputs() const { return NumOutputs; } 1389 1390 IdentifierInfo *getOutputIdentifier(unsigned i) const { 1391 return Names[i]; 1392 } 1393 1394 StringRef getOutputName(unsigned i) const { 1395 if (IdentifierInfo *II = getOutputIdentifier(i)) 1396 return II->getName(); 1397 1398 return StringRef(); 1399 } 1400 1401 /// getOutputConstraint - Return the constraint string for the specified 1402 /// output operand. All output constraints are known to be non-empty (either 1403 /// '=' or '+'). 1404 StringRef getOutputConstraint(unsigned i) const; 1405 1406 /// isOutputPlusConstraint - Return true if the specified output constraint 1407 /// is a "+" constraint (which is both an input and an output) or false if it 1408 /// is an "=" constraint (just an output). 1409 bool isOutputPlusConstraint(unsigned i) const { 1410 return getOutputConstraint(i)[0] == '+'; 1411 } 1412 1413 const Expr *getOutputExpr(unsigned i) const; 1414 1415 /// getNumPlusOperands - Return the number of output operands that have a "+" 1416 /// constraint. 1417 unsigned getNumPlusOperands() const; 1418 1419 //===--- Input operands ---===// 1420 1421 unsigned getNumInputs() const { return NumInputs; } 1422 1423 IdentifierInfo *getInputIdentifier(unsigned i) const { 1424 return Names[i + NumOutputs]; 1425 } 1426 1427 StringRef getInputName(unsigned i) const { 1428 if (IdentifierInfo *II = getInputIdentifier(i)) 1429 return II->getName(); 1430 1431 return StringRef(); 1432 } 1433 1434 /// getInputConstraint - Return the specified input constraint. Unlike output 1435 /// constraints, these can be empty. 1436 StringRef getInputConstraint(unsigned i) const; 1437 1438 const Expr *getInputExpr(unsigned i) const; 1439 1440 //===--- Other ---===// 1441 1442 unsigned getNumClobbers() const { return NumClobbers; } 1443 StringRef getClobber(unsigned i) const; 1444 1445 static bool classof(const Stmt *T) { 1446 return T->getStmtClass() == GCCAsmStmtClass || 1447 T->getStmtClass() == MSAsmStmtClass; 1448 } 1449 1450 // Input expr iterators. 1451 1452 typedef ExprIterator inputs_iterator; 1453 typedef ConstExprIterator const_inputs_iterator; 1454 1455 inputs_iterator begin_inputs() { 1456 return &Exprs[0] + NumOutputs; 1457 } 1458 1459 inputs_iterator end_inputs() { 1460 return &Exprs[0] + NumOutputs + NumInputs; 1461 } 1462 1463 const_inputs_iterator begin_inputs() const { 1464 return &Exprs[0] + NumOutputs; 1465 } 1466 1467 const_inputs_iterator end_inputs() const { 1468 return &Exprs[0] + NumOutputs + NumInputs; 1469 } 1470 1471 // Output expr iterators. 1472 1473 typedef ExprIterator outputs_iterator; 1474 typedef ConstExprIterator const_outputs_iterator; 1475 1476 outputs_iterator begin_outputs() { 1477 return &Exprs[0]; 1478 } 1479 outputs_iterator end_outputs() { 1480 return &Exprs[0] + NumOutputs; 1481 } 1482 1483 const_outputs_iterator begin_outputs() const { 1484 return &Exprs[0]; 1485 } 1486 const_outputs_iterator end_outputs() const { 1487 return &Exprs[0] + NumOutputs; 1488 } 1489 1490 child_range children() { 1491 return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs); 1492 } 1493}; 1494 1495/// This represents a GCC inline-assembly statement extension. 1496/// 1497class GCCAsmStmt : public AsmStmt { 1498 SourceLocation RParenLoc; 1499 StringLiteral *AsmStr; 1500 1501 // FIXME: If we wanted to, we could allocate all of these in one big array. 1502 StringLiteral **Constraints; 1503 StringLiteral **Clobbers; 1504 1505public: 1506 GCCAsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, 1507 bool isvolatile, unsigned numoutputs, unsigned numinputs, 1508 IdentifierInfo **names, StringLiteral **constraints, Expr **exprs, 1509 StringLiteral *asmstr, unsigned numclobbers, 1510 StringLiteral **clobbers, SourceLocation rparenloc); 1511 1512 /// \brief Build an empty inline-assembly statement. 1513 explicit GCCAsmStmt(EmptyShell Empty) : AsmStmt(GCCAsmStmtClass, Empty), 1514 Constraints(0), Clobbers(0) { } 1515 1516 SourceLocation getRParenLoc() const { return RParenLoc; } 1517 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1518 1519 //===--- Asm String Analysis ---===// 1520 1521 const StringLiteral *getAsmString() const { return AsmStr; } 1522 StringLiteral *getAsmString() { return AsmStr; } 1523 void setAsmString(StringLiteral *E) { AsmStr = E; } 1524 1525 /// AsmStringPiece - this is part of a decomposed asm string specification 1526 /// (for use with the AnalyzeAsmString function below). An asm string is 1527 /// considered to be a concatenation of these parts. 1528 class AsmStringPiece { 1529 public: 1530 enum Kind { 1531 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1532 Operand // Operand reference, with optional modifier %c4. 1533 }; 1534 private: 1535 Kind MyKind; 1536 std::string Str; 1537 unsigned OperandNo; 1538 public: 1539 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1540 AsmStringPiece(unsigned OpNo, char Modifier) 1541 : MyKind(Operand), Str(), OperandNo(OpNo) { 1542 Str += Modifier; 1543 } 1544 1545 bool isString() const { return MyKind == String; } 1546 bool isOperand() const { return MyKind == Operand; } 1547 1548 const std::string &getString() const { 1549 assert(isString()); 1550 return Str; 1551 } 1552 1553 unsigned getOperandNo() const { 1554 assert(isOperand()); 1555 return OperandNo; 1556 } 1557 1558 /// getModifier - Get the modifier for this operand, if present. This 1559 /// returns '\0' if there was no modifier. 1560 char getModifier() const { 1561 assert(isOperand()); 1562 return Str[0]; 1563 } 1564 }; 1565 1566 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1567 /// it into pieces. If the asm string is erroneous, emit errors and return 1568 /// true, otherwise return false. This handles canonicalization and 1569 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1570 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1571 unsigned AnalyzeAsmString(SmallVectorImpl<AsmStringPiece> &Pieces, 1572 ASTContext &C, unsigned &DiagOffs) const; 1573 1574 /// Assemble final IR asm string. 1575 std::string generateAsmString(ASTContext &C) const; 1576 1577 //===--- Output operands ---===// 1578 1579 StringRef getOutputConstraint(unsigned i) const; 1580 1581 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1582 return Constraints[i]; 1583 } 1584 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1585 return Constraints[i]; 1586 } 1587 1588 Expr *getOutputExpr(unsigned i); 1589 1590 const Expr *getOutputExpr(unsigned i) const { 1591 return const_cast<GCCAsmStmt*>(this)->getOutputExpr(i); 1592 } 1593 1594 //===--- Input operands ---===// 1595 1596 StringRef getInputConstraint(unsigned i) const; 1597 1598 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1599 return Constraints[i + NumOutputs]; 1600 } 1601 StringLiteral *getInputConstraintLiteral(unsigned i) { 1602 return Constraints[i + NumOutputs]; 1603 } 1604 1605 Expr *getInputExpr(unsigned i); 1606 void setInputExpr(unsigned i, Expr *E); 1607 1608 const Expr *getInputExpr(unsigned i) const { 1609 return const_cast<GCCAsmStmt*>(this)->getInputExpr(i); 1610 } 1611 1612 void setOutputsAndInputsAndClobbers(ASTContext &C, 1613 IdentifierInfo **Names, 1614 StringLiteral **Constraints, 1615 Stmt **Exprs, 1616 unsigned NumOutputs, 1617 unsigned NumInputs, 1618 StringLiteral **Clobbers, 1619 unsigned NumClobbers); 1620 1621 //===--- Other ---===// 1622 1623 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1624 /// translate this into a numeric value needed to reference the same operand. 1625 /// This returns -1 if the operand name is invalid. 1626 int getNamedOperand(StringRef SymbolicName) const; 1627 1628 StringRef getClobber(unsigned i) const; 1629 StringLiteral *getClobberStringLiteral(unsigned i) { return Clobbers[i]; } 1630 const StringLiteral *getClobberStringLiteral(unsigned i) const { 1631 return Clobbers[i]; 1632 } 1633 1634 SourceRange getSourceRange() const LLVM_READONLY { 1635 return SourceRange(AsmLoc, RParenLoc); 1636 } 1637 1638 static bool classof(const Stmt *T) { 1639 return T->getStmtClass() == GCCAsmStmtClass; 1640 } 1641}; 1642 1643/// This represents a Microsoft inline-assembly statement extension. 1644/// 1645class MSAsmStmt : public AsmStmt { 1646 SourceLocation AsmLoc, LBraceLoc, EndLoc; 1647 std::string AsmStr; 1648 1649 unsigned NumAsmToks; 1650 1651 Token *AsmToks; 1652 StringRef *Constraints; 1653 StringRef *Clobbers; 1654 1655public: 1656 MSAsmStmt(ASTContext &C, SourceLocation asmloc, SourceLocation lbraceloc, 1657 bool issimple, bool isvolatile, ArrayRef<Token> asmtoks, 1658 unsigned numoutputs, unsigned numinputs, 1659 ArrayRef<IdentifierInfo*> names, ArrayRef<StringRef> constraints, 1660 ArrayRef<Expr*> exprs, StringRef asmstr, 1661 ArrayRef<StringRef> clobbers, SourceLocation endloc); 1662 1663 /// \brief Build an empty MS-style inline-assembly statement. 1664 explicit MSAsmStmt(EmptyShell Empty) : AsmStmt(MSAsmStmtClass, Empty), 1665 NumAsmToks(0), AsmToks(0), Constraints(0), Clobbers(0) { } 1666 1667 SourceLocation getLBraceLoc() const { return LBraceLoc; } 1668 void setLBraceLoc(SourceLocation L) { LBraceLoc = L; } 1669 SourceLocation getEndLoc() const { return EndLoc; } 1670 void setEndLoc(SourceLocation L) { EndLoc = L; } 1671 1672 bool hasBraces() const { return LBraceLoc.isValid(); } 1673 1674 unsigned getNumAsmToks() { return NumAsmToks; } 1675 Token *getAsmToks() { return AsmToks; } 1676 1677 //===--- Asm String Analysis ---===// 1678 1679 const std::string *getAsmString() const { return &AsmStr; } 1680 std::string *getAsmString() { return &AsmStr; } 1681 void setAsmString(StringRef &E) { AsmStr = E.str(); } 1682 1683 /// Assemble final IR asm string. 1684 std::string generateAsmString(ASTContext &C) const; 1685 1686 //===--- Output operands ---===// 1687 1688 StringRef getOutputConstraint(unsigned i) const { 1689 return Constraints[i]; 1690 } 1691 1692 Expr *getOutputExpr(unsigned i); 1693 1694 const Expr *getOutputExpr(unsigned i) const { 1695 return const_cast<MSAsmStmt*>(this)->getOutputExpr(i); 1696 } 1697 1698 //===--- Input operands ---===// 1699 1700 StringRef getInputConstraint(unsigned i) const { 1701 return Constraints[i + NumOutputs]; 1702 } 1703 1704 Expr *getInputExpr(unsigned i); 1705 void setInputExpr(unsigned i, Expr *E); 1706 1707 const Expr *getInputExpr(unsigned i) const { 1708 return const_cast<MSAsmStmt*>(this)->getInputExpr(i); 1709 } 1710 1711 //===--- Other ---===// 1712 1713 StringRef getClobber(unsigned i) const { return Clobbers[i]; } 1714 1715 SourceRange getSourceRange() const LLVM_READONLY { 1716 return SourceRange(AsmLoc, EndLoc); 1717 } 1718 static bool classof(const Stmt *T) { 1719 return T->getStmtClass() == MSAsmStmtClass; 1720 } 1721 1722 child_range children() { 1723 return child_range(&Exprs[0], &Exprs[0]); 1724 } 1725}; 1726 1727class SEHExceptStmt : public Stmt { 1728 SourceLocation Loc; 1729 Stmt *Children[2]; 1730 1731 enum { FILTER_EXPR, BLOCK }; 1732 1733 SEHExceptStmt(SourceLocation Loc, 1734 Expr *FilterExpr, 1735 Stmt *Block); 1736 1737 friend class ASTReader; 1738 friend class ASTStmtReader; 1739 explicit SEHExceptStmt(EmptyShell E) : Stmt(SEHExceptStmtClass, E) { } 1740 1741public: 1742 static SEHExceptStmt* Create(ASTContext &C, 1743 SourceLocation ExceptLoc, 1744 Expr *FilterExpr, 1745 Stmt *Block); 1746 SourceRange getSourceRange() const LLVM_READONLY { 1747 return SourceRange(getExceptLoc(), getEndLoc()); 1748 } 1749 1750 SourceLocation getExceptLoc() const { return Loc; } 1751 SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); } 1752 1753 Expr *getFilterExpr() const { 1754 return reinterpret_cast<Expr*>(Children[FILTER_EXPR]); 1755 } 1756 1757 CompoundStmt *getBlock() const { 1758 return llvm::cast<CompoundStmt>(Children[BLOCK]); 1759 } 1760 1761 child_range children() { 1762 return child_range(Children,Children+2); 1763 } 1764 1765 static bool classof(const Stmt *T) { 1766 return T->getStmtClass() == SEHExceptStmtClass; 1767 } 1768 1769}; 1770 1771class SEHFinallyStmt : public Stmt { 1772 SourceLocation Loc; 1773 Stmt *Block; 1774 1775 SEHFinallyStmt(SourceLocation Loc, 1776 Stmt *Block); 1777 1778 friend class ASTReader; 1779 friend class ASTStmtReader; 1780 explicit SEHFinallyStmt(EmptyShell E) : Stmt(SEHFinallyStmtClass, E) { } 1781 1782public: 1783 static SEHFinallyStmt* Create(ASTContext &C, 1784 SourceLocation FinallyLoc, 1785 Stmt *Block); 1786 1787 SourceRange getSourceRange() const LLVM_READONLY { 1788 return SourceRange(getFinallyLoc(), getEndLoc()); 1789 } 1790 1791 SourceLocation getFinallyLoc() const { return Loc; } 1792 SourceLocation getEndLoc() const { return Block->getLocEnd(); } 1793 1794 CompoundStmt *getBlock() const { return llvm::cast<CompoundStmt>(Block); } 1795 1796 child_range children() { 1797 return child_range(&Block,&Block+1); 1798 } 1799 1800 static bool classof(const Stmt *T) { 1801 return T->getStmtClass() == SEHFinallyStmtClass; 1802 } 1803 1804}; 1805 1806class SEHTryStmt : public Stmt { 1807 bool IsCXXTry; 1808 SourceLocation TryLoc; 1809 Stmt *Children[2]; 1810 1811 enum { TRY = 0, HANDLER = 1 }; 1812 1813 SEHTryStmt(bool isCXXTry, // true if 'try' otherwise '__try' 1814 SourceLocation TryLoc, 1815 Stmt *TryBlock, 1816 Stmt *Handler); 1817 1818 friend class ASTReader; 1819 friend class ASTStmtReader; 1820 explicit SEHTryStmt(EmptyShell E) : Stmt(SEHTryStmtClass, E) { } 1821 1822public: 1823 static SEHTryStmt* Create(ASTContext &C, 1824 bool isCXXTry, 1825 SourceLocation TryLoc, 1826 Stmt *TryBlock, 1827 Stmt *Handler); 1828 1829 SourceRange getSourceRange() const LLVM_READONLY { 1830 return SourceRange(getTryLoc(), getEndLoc()); 1831 } 1832 1833 SourceLocation getTryLoc() const { return TryLoc; } 1834 SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); } 1835 1836 bool getIsCXXTry() const { return IsCXXTry; } 1837 1838 CompoundStmt* getTryBlock() const { 1839 return llvm::cast<CompoundStmt>(Children[TRY]); 1840 } 1841 1842 Stmt *getHandler() const { return Children[HANDLER]; } 1843 1844 /// Returns 0 if not defined 1845 SEHExceptStmt *getExceptHandler() const; 1846 SEHFinallyStmt *getFinallyHandler() const; 1847 1848 child_range children() { 1849 return child_range(Children,Children+2); 1850 } 1851 1852 static bool classof(const Stmt *T) { 1853 return T->getStmtClass() == SEHTryStmtClass; 1854 } 1855}; 1856 1857} // end namespace clang 1858 1859#endif 1860