Stmt.h revision 65d78312ce026092cb6e7b1d4d06f05e18d02aa0
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/StmtIterator.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/LLVM.h" 21#include "clang/Basic/SourceLocation.h" 22#include "llvm/ADT/ArrayRef.h" 23#include "llvm/Support/Compiler.h" 24#include "llvm/Support/ErrorHandling.h" 25#include <string> 26 27namespace llvm { 28 class FoldingSetNodeID; 29} 30 31namespace clang { 32 class ASTContext; 33 class Attr; 34 class Decl; 35 class Expr; 36 class IdentifierInfo; 37 class LabelDecl; 38 class ParmVarDecl; 39 class PrinterHelper; 40 struct PrintingPolicy; 41 class QualType; 42 class SourceManager; 43 class StringLiteral; 44 class SwitchStmt; 45 class Token; 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 SourceLocation getLocStart() const LLVM_READONLY { return StartLoc; } 467 SourceLocation getLocEnd() const LLVM_READONLY { return EndLoc; } 468 469 static bool classof(const Stmt *T) { 470 return T->getStmtClass() == DeclStmtClass; 471 } 472 473 // Iterators over subexpressions. 474 child_range children() { 475 return child_range(child_iterator(DG.begin(), DG.end()), 476 child_iterator(DG.end(), DG.end())); 477 } 478 479 typedef DeclGroupRef::iterator decl_iterator; 480 typedef DeclGroupRef::const_iterator const_decl_iterator; 481 482 decl_iterator decl_begin() { return DG.begin(); } 483 decl_iterator decl_end() { return DG.end(); } 484 const_decl_iterator decl_begin() const { return DG.begin(); } 485 const_decl_iterator decl_end() const { return DG.end(); } 486 487 typedef std::reverse_iterator<decl_iterator> reverse_decl_iterator; 488 reverse_decl_iterator decl_rbegin() { 489 return reverse_decl_iterator(decl_end()); 490 } 491 reverse_decl_iterator decl_rend() { 492 return reverse_decl_iterator(decl_begin()); 493 } 494}; 495 496/// NullStmt - This is the null statement ";": C99 6.8.3p3. 497/// 498class NullStmt : public Stmt { 499 SourceLocation SemiLoc; 500 501 /// \brief True if the null statement was preceded by an empty macro, e.g: 502 /// @code 503 /// #define CALL(x) 504 /// CALL(0); 505 /// @endcode 506 bool HasLeadingEmptyMacro; 507public: 508 NullStmt(SourceLocation L, bool hasLeadingEmptyMacro = false) 509 : Stmt(NullStmtClass), SemiLoc(L), 510 HasLeadingEmptyMacro(hasLeadingEmptyMacro) {} 511 512 /// \brief Build an empty null statement. 513 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty), 514 HasLeadingEmptyMacro(false) { } 515 516 SourceLocation getSemiLoc() const { return SemiLoc; } 517 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 518 519 bool hasLeadingEmptyMacro() const { return HasLeadingEmptyMacro; } 520 521 SourceLocation getLocStart() const LLVM_READONLY { return SemiLoc; } 522 SourceLocation getLocEnd() const LLVM_READONLY { return 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 SourceLocation getLocStart() const LLVM_READONLY { return LBracLoc; } 595 SourceLocation getLocEnd() const LLVM_READONLY { return RBracLoc; } 596 597 SourceLocation getLBracLoc() const { return LBracLoc; } 598 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 599 SourceLocation getRBracLoc() const { return RBracLoc; } 600 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 601 602 static bool classof(const Stmt *T) { 603 return T->getStmtClass() == CompoundStmtClass; 604 } 605 606 // Iterators 607 child_range children() { 608 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 609 } 610 611 const_child_range children() const { 612 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 613 } 614}; 615 616// SwitchCase is the base class for CaseStmt and DefaultStmt, 617class SwitchCase : public Stmt { 618protected: 619 // A pointer to the following CaseStmt or DefaultStmt class, 620 // used by SwitchStmt. 621 SwitchCase *NextSwitchCase; 622 623 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 624 625public: 626 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 627 628 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 629 630 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 631 632 Stmt *getSubStmt(); 633 const Stmt *getSubStmt() const { 634 return const_cast<SwitchCase*>(this)->getSubStmt(); 635 } 636 637 SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); } 638 SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); } 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 SourceLocation getLocStart() const LLVM_READONLY { return CaseLoc; } 692 SourceLocation getLocEnd() 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 CS->getSubStmt()->getLocEnd(); 699 } 700 701 static bool classof(const Stmt *T) { 702 return T->getStmtClass() == CaseStmtClass; 703 } 704 705 // Iterators 706 child_range children() { 707 return child_range(&SubExprs[0], &SubExprs[END_EXPR]); 708 } 709}; 710 711class DefaultStmt : public SwitchCase { 712 Stmt* SubStmt; 713 SourceLocation DefaultLoc; 714 SourceLocation ColonLoc; 715public: 716 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 717 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL), 718 ColonLoc(CL) {} 719 720 /// \brief Build an empty default statement. 721 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 722 723 Stmt *getSubStmt() { return SubStmt; } 724 const Stmt *getSubStmt() const { return SubStmt; } 725 void setSubStmt(Stmt *S) { SubStmt = S; } 726 727 SourceLocation getDefaultLoc() const { return DefaultLoc; } 728 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 729 SourceLocation getColonLoc() const { return ColonLoc; } 730 void setColonLoc(SourceLocation L) { ColonLoc = L; } 731 732 SourceLocation getLocStart() const LLVM_READONLY { return DefaultLoc; } 733 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 734 735 static bool classof(const Stmt *T) { 736 return T->getStmtClass() == DefaultStmtClass; 737 } 738 739 // Iterators 740 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 741}; 742 743 744/// LabelStmt - Represents a label, which has a substatement. For example: 745/// foo: return; 746/// 747class LabelStmt : public Stmt { 748 LabelDecl *TheDecl; 749 Stmt *SubStmt; 750 SourceLocation IdentLoc; 751public: 752 LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt) 753 : Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) { 754 } 755 756 // \brief Build an empty label statement. 757 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 758 759 SourceLocation getIdentLoc() const { return IdentLoc; } 760 LabelDecl *getDecl() const { return TheDecl; } 761 void setDecl(LabelDecl *D) { TheDecl = D; } 762 const char *getName() const; 763 Stmt *getSubStmt() { return SubStmt; } 764 const Stmt *getSubStmt() const { return SubStmt; } 765 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 766 void setSubStmt(Stmt *SS) { SubStmt = SS; } 767 768 SourceLocation getLocStart() const LLVM_READONLY { return IdentLoc; } 769 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 770 771 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 772 773 static bool classof(const Stmt *T) { 774 return T->getStmtClass() == LabelStmtClass; 775 } 776}; 777 778 779/// \brief Represents an attribute applied to a statement. 780/// 781/// Represents an attribute applied to a statement. For example: 782/// [[omp::for(...)]] for (...) { ... } 783/// 784class AttributedStmt : public Stmt { 785 Stmt *SubStmt; 786 SourceLocation AttrLoc; 787 unsigned NumAttrs; 788 const Attr *Attrs[1]; 789 790 friend class ASTStmtReader; 791 792 AttributedStmt(SourceLocation Loc, ArrayRef<const Attr*> Attrs, Stmt *SubStmt) 793 : Stmt(AttributedStmtClass), SubStmt(SubStmt), AttrLoc(Loc), 794 NumAttrs(Attrs.size()) { 795 memcpy(this->Attrs, Attrs.data(), Attrs.size() * sizeof(Attr*)); 796 } 797 798 explicit AttributedStmt(EmptyShell Empty, unsigned NumAttrs) 799 : Stmt(AttributedStmtClass, Empty), NumAttrs(NumAttrs) { 800 memset(Attrs, 0, NumAttrs * sizeof(Attr*)); 801 } 802 803public: 804 static AttributedStmt *Create(ASTContext &C, SourceLocation Loc, 805 ArrayRef<const Attr*> Attrs, Stmt *SubStmt); 806 // \brief Build an empty attributed statement. 807 static AttributedStmt *CreateEmpty(ASTContext &C, unsigned NumAttrs); 808 809 SourceLocation getAttrLoc() const { return AttrLoc; } 810 ArrayRef<const Attr*> getAttrs() const { 811 return ArrayRef<const Attr*>(Attrs, NumAttrs); 812 } 813 Stmt *getSubStmt() { return SubStmt; } 814 const Stmt *getSubStmt() const { return SubStmt; } 815 816 SourceLocation getLocStart() const LLVM_READONLY { return AttrLoc; } 817 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 818 819 child_range children() { return child_range(&SubStmt, &SubStmt + 1); } 820 821 static bool classof(const Stmt *T) { 822 return T->getStmtClass() == AttributedStmtClass; 823 } 824}; 825 826 827/// IfStmt - This represents an if/then/else. 828/// 829class IfStmt : public Stmt { 830 enum { VAR, COND, THEN, ELSE, END_EXPR }; 831 Stmt* SubExprs[END_EXPR]; 832 833 SourceLocation IfLoc; 834 SourceLocation ElseLoc; 835 836public: 837 IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond, 838 Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0); 839 840 /// \brief Build an empty if/then/else statement 841 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 842 843 /// \brief Retrieve the variable declared in this "if" statement, if any. 844 /// 845 /// In the following example, "x" is the condition variable. 846 /// \code 847 /// if (int x = foo()) { 848 /// printf("x is %d", x); 849 /// } 850 /// \endcode 851 VarDecl *getConditionVariable() const; 852 void setConditionVariable(ASTContext &C, VarDecl *V); 853 854 /// If this IfStmt has a condition variable, return the faux DeclStmt 855 /// associated with the creation of that condition variable. 856 const DeclStmt *getConditionVariableDeclStmt() const { 857 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 858 } 859 860 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 861 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 862 const Stmt *getThen() const { return SubExprs[THEN]; } 863 void setThen(Stmt *S) { SubExprs[THEN] = S; } 864 const Stmt *getElse() const { return SubExprs[ELSE]; } 865 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 866 867 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 868 Stmt *getThen() { return SubExprs[THEN]; } 869 Stmt *getElse() { return SubExprs[ELSE]; } 870 871 SourceLocation getIfLoc() const { return IfLoc; } 872 void setIfLoc(SourceLocation L) { IfLoc = L; } 873 SourceLocation getElseLoc() const { return ElseLoc; } 874 void setElseLoc(SourceLocation L) { ElseLoc = L; } 875 876 SourceLocation getLocStart() const LLVM_READONLY { return IfLoc; } 877 SourceLocation getLocEnd() const LLVM_READONLY { 878 if (SubExprs[ELSE]) 879 return SubExprs[ELSE]->getLocEnd(); 880 else 881 return 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 SourceLocation getLocStart() const LLVM_READONLY { return SwitchLoc; } 976 SourceLocation getLocEnd() const LLVM_READONLY { 977 return SubExprs[BODY]->getLocEnd(); 978 } 979 980 // Iterators 981 child_range children() { 982 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 983 } 984 985 static bool classof(const Stmt *T) { 986 return T->getStmtClass() == SwitchStmtClass; 987 } 988}; 989 990 991/// WhileStmt - This represents a 'while' stmt. 992/// 993class WhileStmt : public Stmt { 994 enum { VAR, COND, BODY, END_EXPR }; 995 Stmt* SubExprs[END_EXPR]; 996 SourceLocation WhileLoc; 997public: 998 WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body, 999 SourceLocation WL); 1000 1001 /// \brief Build an empty while statement. 1002 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 1003 1004 /// \brief Retrieve the variable declared in this "while" statement, if any. 1005 /// 1006 /// In the following example, "x" is the condition variable. 1007 /// \code 1008 /// while (int x = random()) { 1009 /// // ... 1010 /// } 1011 /// \endcode 1012 VarDecl *getConditionVariable() const; 1013 void setConditionVariable(ASTContext &C, VarDecl *V); 1014 1015 /// If this WhileStmt has a condition variable, return the faux DeclStmt 1016 /// associated with the creation of that condition variable. 1017 const DeclStmt *getConditionVariableDeclStmt() const { 1018 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 1019 } 1020 1021 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1022 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1023 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1024 Stmt *getBody() { return SubExprs[BODY]; } 1025 const Stmt *getBody() const { return SubExprs[BODY]; } 1026 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1027 1028 SourceLocation getWhileLoc() const { return WhileLoc; } 1029 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1030 1031 SourceLocation getLocStart() const LLVM_READONLY { return WhileLoc; } 1032 SourceLocation getLocEnd() const LLVM_READONLY { 1033 return SubExprs[BODY]->getLocEnd(); 1034 } 1035 1036 static bool classof(const Stmt *T) { 1037 return T->getStmtClass() == WhileStmtClass; 1038 } 1039 1040 // Iterators 1041 child_range children() { 1042 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1043 } 1044}; 1045 1046/// DoStmt - This represents a 'do/while' stmt. 1047/// 1048class DoStmt : public Stmt { 1049 enum { BODY, COND, END_EXPR }; 1050 Stmt* SubExprs[END_EXPR]; 1051 SourceLocation DoLoc; 1052 SourceLocation WhileLoc; 1053 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 1054 1055public: 1056 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 1057 SourceLocation RP) 1058 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 1059 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 1060 SubExprs[BODY] = body; 1061 } 1062 1063 /// \brief Build an empty do-while statement. 1064 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 1065 1066 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1067 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1068 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1069 Stmt *getBody() { return SubExprs[BODY]; } 1070 const Stmt *getBody() const { return SubExprs[BODY]; } 1071 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1072 1073 SourceLocation getDoLoc() const { return DoLoc; } 1074 void setDoLoc(SourceLocation L) { DoLoc = L; } 1075 SourceLocation getWhileLoc() const { return WhileLoc; } 1076 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1077 1078 SourceLocation getRParenLoc() const { return RParenLoc; } 1079 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1080 1081 SourceLocation getLocStart() const LLVM_READONLY { return DoLoc; } 1082 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1083 1084 static bool classof(const Stmt *T) { 1085 return T->getStmtClass() == DoStmtClass; 1086 } 1087 1088 // Iterators 1089 child_range children() { 1090 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1091 } 1092}; 1093 1094 1095/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 1096/// the init/cond/inc parts of the ForStmt will be null if they were not 1097/// specified in the source. 1098/// 1099class ForStmt : public Stmt { 1100 enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR }; 1101 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 1102 SourceLocation ForLoc; 1103 SourceLocation LParenLoc, RParenLoc; 1104 1105public: 1106 ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc, 1107 Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP); 1108 1109 /// \brief Build an empty for statement. 1110 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 1111 1112 Stmt *getInit() { return SubExprs[INIT]; } 1113 1114 /// \brief Retrieve the variable declared in this "for" statement, if any. 1115 /// 1116 /// In the following example, "y" is the condition variable. 1117 /// \code 1118 /// for (int x = random(); int y = mangle(x); ++x) { 1119 /// // ... 1120 /// } 1121 /// \endcode 1122 VarDecl *getConditionVariable() const; 1123 void setConditionVariable(ASTContext &C, VarDecl *V); 1124 1125 /// If this ForStmt has a condition variable, return the faux DeclStmt 1126 /// associated with the creation of that condition variable. 1127 const DeclStmt *getConditionVariableDeclStmt() const { 1128 return reinterpret_cast<DeclStmt*>(SubExprs[CONDVAR]); 1129 } 1130 1131 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1132 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1133 Stmt *getBody() { return SubExprs[BODY]; } 1134 1135 const Stmt *getInit() const { return SubExprs[INIT]; } 1136 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1137 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1138 const Stmt *getBody() const { return SubExprs[BODY]; } 1139 1140 void setInit(Stmt *S) { SubExprs[INIT] = S; } 1141 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1142 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 1143 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1144 1145 SourceLocation getForLoc() const { return ForLoc; } 1146 void setForLoc(SourceLocation L) { ForLoc = L; } 1147 SourceLocation getLParenLoc() const { return LParenLoc; } 1148 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1149 SourceLocation getRParenLoc() const { return RParenLoc; } 1150 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1151 1152 SourceLocation getLocStart() const LLVM_READONLY { return ForLoc; } 1153 SourceLocation getLocEnd() const LLVM_READONLY { 1154 return SubExprs[BODY]->getLocEnd(); 1155 } 1156 1157 static bool classof(const Stmt *T) { 1158 return T->getStmtClass() == ForStmtClass; 1159 } 1160 1161 // Iterators 1162 child_range children() { 1163 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1164 } 1165}; 1166 1167/// GotoStmt - This represents a direct goto. 1168/// 1169class GotoStmt : public Stmt { 1170 LabelDecl *Label; 1171 SourceLocation GotoLoc; 1172 SourceLocation LabelLoc; 1173public: 1174 GotoStmt(LabelDecl *label, SourceLocation GL, SourceLocation LL) 1175 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 1176 1177 /// \brief Build an empty goto statement. 1178 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 1179 1180 LabelDecl *getLabel() const { return Label; } 1181 void setLabel(LabelDecl *D) { Label = D; } 1182 1183 SourceLocation getGotoLoc() const { return GotoLoc; } 1184 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1185 SourceLocation getLabelLoc() const { return LabelLoc; } 1186 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 1187 1188 SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; } 1189 SourceLocation getLocEnd() const LLVM_READONLY { return LabelLoc; } 1190 1191 static bool classof(const Stmt *T) { 1192 return T->getStmtClass() == GotoStmtClass; 1193 } 1194 1195 // Iterators 1196 child_range children() { return child_range(); } 1197}; 1198 1199/// IndirectGotoStmt - This represents an indirect goto. 1200/// 1201class IndirectGotoStmt : public Stmt { 1202 SourceLocation GotoLoc; 1203 SourceLocation StarLoc; 1204 Stmt *Target; 1205public: 1206 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 1207 Expr *target) 1208 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 1209 Target((Stmt*)target) {} 1210 1211 /// \brief Build an empty indirect goto statement. 1212 explicit IndirectGotoStmt(EmptyShell Empty) 1213 : Stmt(IndirectGotoStmtClass, Empty) { } 1214 1215 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1216 SourceLocation getGotoLoc() const { return GotoLoc; } 1217 void setStarLoc(SourceLocation L) { StarLoc = L; } 1218 SourceLocation getStarLoc() const { return StarLoc; } 1219 1220 Expr *getTarget() { return reinterpret_cast<Expr*>(Target); } 1221 const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);} 1222 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 1223 1224 /// getConstantTarget - Returns the fixed target of this indirect 1225 /// goto, if one exists. 1226 LabelDecl *getConstantTarget(); 1227 const LabelDecl *getConstantTarget() const { 1228 return const_cast<IndirectGotoStmt*>(this)->getConstantTarget(); 1229 } 1230 1231 SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; } 1232 SourceLocation getLocEnd() const LLVM_READONLY { return Target->getLocEnd(); } 1233 1234 static bool classof(const Stmt *T) { 1235 return T->getStmtClass() == IndirectGotoStmtClass; 1236 } 1237 1238 // Iterators 1239 child_range children() { return child_range(&Target, &Target+1); } 1240}; 1241 1242 1243/// ContinueStmt - This represents a continue. 1244/// 1245class ContinueStmt : public Stmt { 1246 SourceLocation ContinueLoc; 1247public: 1248 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 1249 1250 /// \brief Build an empty continue statement. 1251 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 1252 1253 SourceLocation getContinueLoc() const { return ContinueLoc; } 1254 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 1255 1256 SourceLocation getLocStart() const LLVM_READONLY { return ContinueLoc; } 1257 SourceLocation getLocEnd() const LLVM_READONLY { return ContinueLoc; } 1258 1259 static bool classof(const Stmt *T) { 1260 return T->getStmtClass() == ContinueStmtClass; 1261 } 1262 1263 // Iterators 1264 child_range children() { return child_range(); } 1265}; 1266 1267/// BreakStmt - This represents a break. 1268/// 1269class BreakStmt : public Stmt { 1270 SourceLocation BreakLoc; 1271public: 1272 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 1273 1274 /// \brief Build an empty break statement. 1275 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 1276 1277 SourceLocation getBreakLoc() const { return BreakLoc; } 1278 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 1279 1280 SourceLocation getLocStart() const LLVM_READONLY { return BreakLoc; } 1281 SourceLocation getLocEnd() const LLVM_READONLY { return BreakLoc; } 1282 1283 static bool classof(const Stmt *T) { 1284 return T->getStmtClass() == BreakStmtClass; 1285 } 1286 1287 // Iterators 1288 child_range children() { return child_range(); } 1289}; 1290 1291 1292/// ReturnStmt - This represents a return, optionally of an expression: 1293/// return; 1294/// return 4; 1295/// 1296/// Note that GCC allows return with no argument in a function declared to 1297/// return a value, and it allows returning a value in functions declared to 1298/// return void. We explicitly model this in the AST, which means you can't 1299/// depend on the return type of the function and the presence of an argument. 1300/// 1301class ReturnStmt : public Stmt { 1302 Stmt *RetExpr; 1303 SourceLocation RetLoc; 1304 const VarDecl *NRVOCandidate; 1305 1306public: 1307 ReturnStmt(SourceLocation RL) 1308 : Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { } 1309 1310 ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate) 1311 : Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL), 1312 NRVOCandidate(NRVOCandidate) {} 1313 1314 /// \brief Build an empty return expression. 1315 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1316 1317 const Expr *getRetValue() const; 1318 Expr *getRetValue(); 1319 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1320 1321 SourceLocation getReturnLoc() const { return RetLoc; } 1322 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1323 1324 /// \brief Retrieve the variable that might be used for the named return 1325 /// value optimization. 1326 /// 1327 /// The optimization itself can only be performed if the variable is 1328 /// also marked as an NRVO object. 1329 const VarDecl *getNRVOCandidate() const { return NRVOCandidate; } 1330 void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; } 1331 1332 SourceLocation getLocStart() const LLVM_READONLY { return RetLoc; } 1333 SourceLocation getLocEnd() const LLVM_READONLY { 1334 return RetExpr ? RetExpr->getLocEnd() : RetLoc; 1335 } 1336 1337 static bool classof(const Stmt *T) { 1338 return T->getStmtClass() == ReturnStmtClass; 1339 } 1340 1341 // Iterators 1342 child_range children() { 1343 if (RetExpr) return child_range(&RetExpr, &RetExpr+1); 1344 return child_range(); 1345 } 1346}; 1347 1348/// AsmStmt is the base class for GCCAsmStmt and MSAsmStmt. 1349/// 1350class AsmStmt : public Stmt { 1351protected: 1352 SourceLocation AsmLoc; 1353 /// \brief True if the assembly statement does not have any input or output 1354 /// operands. 1355 bool IsSimple; 1356 1357 /// \brief If true, treat this inline assembly as having side effects. 1358 /// This assembly statement should not be optimized, deleted or moved. 1359 bool IsVolatile; 1360 1361 unsigned NumOutputs; 1362 unsigned NumInputs; 1363 unsigned NumClobbers; 1364 1365 IdentifierInfo **Names; 1366 Stmt **Exprs; 1367 1368 AsmStmt(StmtClass SC, SourceLocation asmloc, bool issimple, bool isvolatile, 1369 unsigned numoutputs, unsigned numinputs, unsigned numclobbers) : 1370 Stmt (SC), AsmLoc(asmloc), IsSimple(issimple), IsVolatile(isvolatile), 1371 NumOutputs(numoutputs), NumInputs(numinputs), NumClobbers(numclobbers) { } 1372 1373public: 1374 /// \brief Build an empty inline-assembly statement. 1375 explicit AsmStmt(StmtClass SC, EmptyShell Empty) : 1376 Stmt(SC, Empty), Names(0), Exprs(0) { } 1377 1378 SourceLocation getAsmLoc() const { return AsmLoc; } 1379 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1380 1381 bool isSimple() const { return IsSimple; } 1382 void setSimple(bool V) { IsSimple = V; } 1383 1384 bool isVolatile() const { return IsVolatile; } 1385 void setVolatile(bool V) { IsVolatile = V; } 1386 1387 SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); } 1388 SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); } 1389 1390 //===--- Asm String Analysis ---===// 1391 1392 /// Assemble final IR asm string. 1393 std::string generateAsmString(ASTContext &C) const; 1394 1395 //===--- Output operands ---===// 1396 1397 unsigned getNumOutputs() const { return NumOutputs; } 1398 1399 IdentifierInfo *getOutputIdentifier(unsigned i) const { 1400 return Names[i]; 1401 } 1402 1403 StringRef getOutputName(unsigned i) const { 1404 if (IdentifierInfo *II = getOutputIdentifier(i)) 1405 return II->getName(); 1406 1407 return StringRef(); 1408 } 1409 1410 /// getOutputConstraint - Return the constraint string for the specified 1411 /// output operand. All output constraints are known to be non-empty (either 1412 /// '=' or '+'). 1413 StringRef getOutputConstraint(unsigned i) const; 1414 1415 /// isOutputPlusConstraint - Return true if the specified output constraint 1416 /// is a "+" constraint (which is both an input and an output) or false if it 1417 /// is an "=" constraint (just an output). 1418 bool isOutputPlusConstraint(unsigned i) const { 1419 return getOutputConstraint(i)[0] == '+'; 1420 } 1421 1422 const Expr *getOutputExpr(unsigned i) const; 1423 1424 /// getNumPlusOperands - Return the number of output operands that have a "+" 1425 /// constraint. 1426 unsigned getNumPlusOperands() const; 1427 1428 //===--- Input operands ---===// 1429 1430 unsigned getNumInputs() const { return NumInputs; } 1431 1432 IdentifierInfo *getInputIdentifier(unsigned i) const { 1433 return Names[i + NumOutputs]; 1434 } 1435 1436 StringRef getInputName(unsigned i) const { 1437 if (IdentifierInfo *II = getInputIdentifier(i)) 1438 return II->getName(); 1439 1440 return StringRef(); 1441 } 1442 1443 /// getInputConstraint - Return the specified input constraint. Unlike output 1444 /// constraints, these can be empty. 1445 StringRef getInputConstraint(unsigned i) const; 1446 1447 const Expr *getInputExpr(unsigned i) const; 1448 1449 //===--- Other ---===// 1450 1451 unsigned getNumClobbers() const { return NumClobbers; } 1452 StringRef getClobber(unsigned i) const; 1453 1454 static bool classof(const Stmt *T) { 1455 return T->getStmtClass() == GCCAsmStmtClass || 1456 T->getStmtClass() == MSAsmStmtClass; 1457 } 1458 1459 // Input expr iterators. 1460 1461 typedef ExprIterator inputs_iterator; 1462 typedef ConstExprIterator const_inputs_iterator; 1463 1464 inputs_iterator begin_inputs() { 1465 return &Exprs[0] + NumOutputs; 1466 } 1467 1468 inputs_iterator end_inputs() { 1469 return &Exprs[0] + NumOutputs + NumInputs; 1470 } 1471 1472 const_inputs_iterator begin_inputs() const { 1473 return &Exprs[0] + NumOutputs; 1474 } 1475 1476 const_inputs_iterator end_inputs() const { 1477 return &Exprs[0] + NumOutputs + NumInputs; 1478 } 1479 1480 // Output expr iterators. 1481 1482 typedef ExprIterator outputs_iterator; 1483 typedef ConstExprIterator const_outputs_iterator; 1484 1485 outputs_iterator begin_outputs() { 1486 return &Exprs[0]; 1487 } 1488 outputs_iterator end_outputs() { 1489 return &Exprs[0] + NumOutputs; 1490 } 1491 1492 const_outputs_iterator begin_outputs() const { 1493 return &Exprs[0]; 1494 } 1495 const_outputs_iterator end_outputs() const { 1496 return &Exprs[0] + NumOutputs; 1497 } 1498 1499 child_range children() { 1500 return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs); 1501 } 1502}; 1503 1504/// This represents a GCC inline-assembly statement extension. 1505/// 1506class GCCAsmStmt : public AsmStmt { 1507 SourceLocation RParenLoc; 1508 StringLiteral *AsmStr; 1509 1510 // FIXME: If we wanted to, we could allocate all of these in one big array. 1511 StringLiteral **Constraints; 1512 StringLiteral **Clobbers; 1513 1514public: 1515 GCCAsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, 1516 bool isvolatile, unsigned numoutputs, unsigned numinputs, 1517 IdentifierInfo **names, StringLiteral **constraints, Expr **exprs, 1518 StringLiteral *asmstr, unsigned numclobbers, 1519 StringLiteral **clobbers, SourceLocation rparenloc); 1520 1521 /// \brief Build an empty inline-assembly statement. 1522 explicit GCCAsmStmt(EmptyShell Empty) : AsmStmt(GCCAsmStmtClass, Empty), 1523 Constraints(0), Clobbers(0) { } 1524 1525 SourceLocation getRParenLoc() const { return RParenLoc; } 1526 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1527 1528 //===--- Asm String Analysis ---===// 1529 1530 const StringLiteral *getAsmString() const { return AsmStr; } 1531 StringLiteral *getAsmString() { return AsmStr; } 1532 void setAsmString(StringLiteral *E) { AsmStr = E; } 1533 1534 /// AsmStringPiece - this is part of a decomposed asm string specification 1535 /// (for use with the AnalyzeAsmString function below). An asm string is 1536 /// considered to be a concatenation of these parts. 1537 class AsmStringPiece { 1538 public: 1539 enum Kind { 1540 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1541 Operand // Operand reference, with optional modifier %c4. 1542 }; 1543 private: 1544 Kind MyKind; 1545 std::string Str; 1546 unsigned OperandNo; 1547 public: 1548 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1549 AsmStringPiece(unsigned OpNo, char Modifier) 1550 : MyKind(Operand), Str(), OperandNo(OpNo) { 1551 Str += Modifier; 1552 } 1553 1554 bool isString() const { return MyKind == String; } 1555 bool isOperand() const { return MyKind == Operand; } 1556 1557 const std::string &getString() const { 1558 assert(isString()); 1559 return Str; 1560 } 1561 1562 unsigned getOperandNo() const { 1563 assert(isOperand()); 1564 return OperandNo; 1565 } 1566 1567 /// getModifier - Get the modifier for this operand, if present. This 1568 /// returns '\0' if there was no modifier. 1569 char getModifier() const { 1570 assert(isOperand()); 1571 return Str[0]; 1572 } 1573 }; 1574 1575 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1576 /// it into pieces. If the asm string is erroneous, emit errors and return 1577 /// true, otherwise return false. This handles canonicalization and 1578 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1579 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1580 unsigned AnalyzeAsmString(SmallVectorImpl<AsmStringPiece> &Pieces, 1581 ASTContext &C, unsigned &DiagOffs) const; 1582 1583 /// Assemble final IR asm string. 1584 std::string generateAsmString(ASTContext &C) const; 1585 1586 //===--- Output operands ---===// 1587 1588 StringRef getOutputConstraint(unsigned i) const; 1589 1590 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1591 return Constraints[i]; 1592 } 1593 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1594 return Constraints[i]; 1595 } 1596 1597 Expr *getOutputExpr(unsigned i); 1598 1599 const Expr *getOutputExpr(unsigned i) const { 1600 return const_cast<GCCAsmStmt*>(this)->getOutputExpr(i); 1601 } 1602 1603 //===--- Input operands ---===// 1604 1605 StringRef getInputConstraint(unsigned i) const; 1606 1607 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1608 return Constraints[i + NumOutputs]; 1609 } 1610 StringLiteral *getInputConstraintLiteral(unsigned i) { 1611 return Constraints[i + NumOutputs]; 1612 } 1613 1614 Expr *getInputExpr(unsigned i); 1615 void setInputExpr(unsigned i, Expr *E); 1616 1617 const Expr *getInputExpr(unsigned i) const { 1618 return const_cast<GCCAsmStmt*>(this)->getInputExpr(i); 1619 } 1620 1621 void setOutputsAndInputsAndClobbers(ASTContext &C, 1622 IdentifierInfo **Names, 1623 StringLiteral **Constraints, 1624 Stmt **Exprs, 1625 unsigned NumOutputs, 1626 unsigned NumInputs, 1627 StringLiteral **Clobbers, 1628 unsigned NumClobbers); 1629 1630 //===--- Other ---===// 1631 1632 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1633 /// translate this into a numeric value needed to reference the same operand. 1634 /// This returns -1 if the operand name is invalid. 1635 int getNamedOperand(StringRef SymbolicName) const; 1636 1637 StringRef getClobber(unsigned i) const; 1638 StringLiteral *getClobberStringLiteral(unsigned i) { return Clobbers[i]; } 1639 const StringLiteral *getClobberStringLiteral(unsigned i) const { 1640 return Clobbers[i]; 1641 } 1642 1643 SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; } 1644 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1645 1646 static bool classof(const Stmt *T) { 1647 return T->getStmtClass() == GCCAsmStmtClass; 1648 } 1649}; 1650 1651/// This represents a Microsoft inline-assembly statement extension. 1652/// 1653class MSAsmStmt : public AsmStmt { 1654 SourceLocation AsmLoc, LBraceLoc, EndLoc; 1655 std::string AsmStr; 1656 1657 unsigned NumAsmToks; 1658 1659 Token *AsmToks; 1660 StringRef *Constraints; 1661 StringRef *Clobbers; 1662 1663public: 1664 MSAsmStmt(ASTContext &C, SourceLocation asmloc, SourceLocation lbraceloc, 1665 bool issimple, bool isvolatile, ArrayRef<Token> asmtoks, 1666 unsigned numoutputs, unsigned numinputs, 1667 ArrayRef<IdentifierInfo*> names, ArrayRef<StringRef> constraints, 1668 ArrayRef<Expr*> exprs, StringRef asmstr, 1669 ArrayRef<StringRef> clobbers, SourceLocation endloc); 1670 1671 /// \brief Build an empty MS-style inline-assembly statement. 1672 explicit MSAsmStmt(EmptyShell Empty) : AsmStmt(MSAsmStmtClass, Empty), 1673 NumAsmToks(0), AsmToks(0), Constraints(0), Clobbers(0) { } 1674 1675 SourceLocation getLBraceLoc() const { return LBraceLoc; } 1676 void setLBraceLoc(SourceLocation L) { LBraceLoc = L; } 1677 SourceLocation getEndLoc() const { return EndLoc; } 1678 void setEndLoc(SourceLocation L) { EndLoc = L; } 1679 1680 bool hasBraces() const { return LBraceLoc.isValid(); } 1681 1682 unsigned getNumAsmToks() { return NumAsmToks; } 1683 Token *getAsmToks() { return AsmToks; } 1684 1685 //===--- Asm String Analysis ---===// 1686 1687 const std::string *getAsmString() const { return &AsmStr; } 1688 std::string *getAsmString() { return &AsmStr; } 1689 void setAsmString(StringRef &E) { AsmStr = E.str(); } 1690 1691 /// Assemble final IR asm string. 1692 std::string generateAsmString(ASTContext &C) const; 1693 1694 //===--- Output operands ---===// 1695 1696 StringRef getOutputConstraint(unsigned i) const { 1697 return Constraints[i]; 1698 } 1699 1700 Expr *getOutputExpr(unsigned i); 1701 1702 const Expr *getOutputExpr(unsigned i) const { 1703 return const_cast<MSAsmStmt*>(this)->getOutputExpr(i); 1704 } 1705 1706 //===--- Input operands ---===// 1707 1708 StringRef getInputConstraint(unsigned i) const { 1709 return Constraints[i + NumOutputs]; 1710 } 1711 1712 Expr *getInputExpr(unsigned i); 1713 void setInputExpr(unsigned i, Expr *E); 1714 1715 const Expr *getInputExpr(unsigned i) const { 1716 return const_cast<MSAsmStmt*>(this)->getInputExpr(i); 1717 } 1718 1719 //===--- Other ---===// 1720 1721 StringRef getClobber(unsigned i) const { return Clobbers[i]; } 1722 1723 SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; } 1724 SourceLocation getLocEnd() const LLVM_READONLY { return EndLoc; } 1725 1726 static bool classof(const Stmt *T) { 1727 return T->getStmtClass() == MSAsmStmtClass; 1728 } 1729 1730 child_range children() { 1731 return child_range(&Exprs[0], &Exprs[0]); 1732 } 1733}; 1734 1735class SEHExceptStmt : public Stmt { 1736 SourceLocation Loc; 1737 Stmt *Children[2]; 1738 1739 enum { FILTER_EXPR, BLOCK }; 1740 1741 SEHExceptStmt(SourceLocation Loc, 1742 Expr *FilterExpr, 1743 Stmt *Block); 1744 1745 friend class ASTReader; 1746 friend class ASTStmtReader; 1747 explicit SEHExceptStmt(EmptyShell E) : Stmt(SEHExceptStmtClass, E) { } 1748 1749public: 1750 static SEHExceptStmt* Create(ASTContext &C, 1751 SourceLocation ExceptLoc, 1752 Expr *FilterExpr, 1753 Stmt *Block); 1754 1755 SourceLocation getLocStart() const LLVM_READONLY { return getExceptLoc(); } 1756 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1757 1758 SourceLocation getExceptLoc() const { return Loc; } 1759 SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); } 1760 1761 Expr *getFilterExpr() const { 1762 return reinterpret_cast<Expr*>(Children[FILTER_EXPR]); 1763 } 1764 1765 CompoundStmt *getBlock() const { 1766 return llvm::cast<CompoundStmt>(Children[BLOCK]); 1767 } 1768 1769 child_range children() { 1770 return child_range(Children,Children+2); 1771 } 1772 1773 static bool classof(const Stmt *T) { 1774 return T->getStmtClass() == SEHExceptStmtClass; 1775 } 1776 1777}; 1778 1779class SEHFinallyStmt : public Stmt { 1780 SourceLocation Loc; 1781 Stmt *Block; 1782 1783 SEHFinallyStmt(SourceLocation Loc, 1784 Stmt *Block); 1785 1786 friend class ASTReader; 1787 friend class ASTStmtReader; 1788 explicit SEHFinallyStmt(EmptyShell E) : Stmt(SEHFinallyStmtClass, E) { } 1789 1790public: 1791 static SEHFinallyStmt* Create(ASTContext &C, 1792 SourceLocation FinallyLoc, 1793 Stmt *Block); 1794 1795 SourceLocation getLocStart() const LLVM_READONLY { return getFinallyLoc(); } 1796 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1797 1798 SourceLocation getFinallyLoc() const { return Loc; } 1799 SourceLocation getEndLoc() const { return Block->getLocEnd(); } 1800 1801 CompoundStmt *getBlock() const { return llvm::cast<CompoundStmt>(Block); } 1802 1803 child_range children() { 1804 return child_range(&Block,&Block+1); 1805 } 1806 1807 static bool classof(const Stmt *T) { 1808 return T->getStmtClass() == SEHFinallyStmtClass; 1809 } 1810 1811}; 1812 1813class SEHTryStmt : public Stmt { 1814 bool IsCXXTry; 1815 SourceLocation TryLoc; 1816 Stmt *Children[2]; 1817 1818 enum { TRY = 0, HANDLER = 1 }; 1819 1820 SEHTryStmt(bool isCXXTry, // true if 'try' otherwise '__try' 1821 SourceLocation TryLoc, 1822 Stmt *TryBlock, 1823 Stmt *Handler); 1824 1825 friend class ASTReader; 1826 friend class ASTStmtReader; 1827 explicit SEHTryStmt(EmptyShell E) : Stmt(SEHTryStmtClass, E) { } 1828 1829public: 1830 static SEHTryStmt* Create(ASTContext &C, 1831 bool isCXXTry, 1832 SourceLocation TryLoc, 1833 Stmt *TryBlock, 1834 Stmt *Handler); 1835 1836 SourceLocation getLocStart() const LLVM_READONLY { return getTryLoc(); } 1837 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1838 1839 SourceLocation getTryLoc() const { return TryLoc; } 1840 SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); } 1841 1842 bool getIsCXXTry() const { return IsCXXTry; } 1843 1844 CompoundStmt* getTryBlock() const { 1845 return llvm::cast<CompoundStmt>(Children[TRY]); 1846 } 1847 1848 Stmt *getHandler() const { return Children[HANDLER]; } 1849 1850 /// Returns 0 if not defined 1851 SEHExceptStmt *getExceptHandler() const; 1852 SEHFinallyStmt *getFinallyHandler() const; 1853 1854 child_range children() { 1855 return child_range(Children,Children+2); 1856 } 1857 1858 static bool classof(const Stmt *T) { 1859 return T->getStmtClass() == SEHTryStmtClass; 1860 } 1861}; 1862 1863} // end namespace clang 1864 1865#endif 1866