Stmt.h revision cfa88f893915ceb8ae4ce2f17c46c24a4d67502f
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, ArrayRef<Stmt*> Stmts, 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 SourceLocation KeywordLoc; 623 SourceLocation ColonLoc; 624 625 SwitchCase(StmtClass SC, SourceLocation KWLoc, SourceLocation ColonLoc) 626 : Stmt(SC), NextSwitchCase(0), KeywordLoc(KWLoc), ColonLoc(ColonLoc) {} 627 628 SwitchCase(StmtClass SC, EmptyShell) 629 : Stmt(SC), NextSwitchCase(0) {} 630 631public: 632 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 633 634 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 635 636 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 637 638 SourceLocation getKeywordLoc() const { return KeywordLoc; } 639 void setKeywordLoc(SourceLocation L) { KeywordLoc = L; } 640 SourceLocation getColonLoc() const { return ColonLoc; } 641 void setColonLoc(SourceLocation L) { ColonLoc = L; } 642 643 Stmt *getSubStmt(); 644 const Stmt *getSubStmt() const { 645 return const_cast<SwitchCase*>(this)->getSubStmt(); 646 } 647 648 SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; } 649 SourceLocation getLocEnd() const LLVM_READONLY; 650 651 static bool classof(const Stmt *T) { 652 return T->getStmtClass() == CaseStmtClass || 653 T->getStmtClass() == DefaultStmtClass; 654 } 655}; 656 657class CaseStmt : public SwitchCase { 658 enum { LHS, RHS, SUBSTMT, END_EXPR }; 659 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 660 // GNU "case 1 ... 4" extension 661 SourceLocation EllipsisLoc; 662public: 663 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc, 664 SourceLocation ellipsisLoc, SourceLocation colonLoc) 665 : SwitchCase(CaseStmtClass, caseLoc, colonLoc) { 666 SubExprs[SUBSTMT] = 0; 667 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 668 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 669 EllipsisLoc = ellipsisLoc; 670 } 671 672 /// \brief Build an empty switch case statement. 673 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass, Empty) { } 674 675 SourceLocation getCaseLoc() const { return KeywordLoc; } 676 void setCaseLoc(SourceLocation L) { KeywordLoc = L; } 677 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 678 void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; } 679 SourceLocation getColonLoc() const { return ColonLoc; } 680 void setColonLoc(SourceLocation L) { ColonLoc = L; } 681 682 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 683 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 684 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 685 686 const Expr *getLHS() const { 687 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 688 } 689 const Expr *getRHS() const { 690 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 691 } 692 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 693 694 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 695 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 696 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 697 698 SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; } 699 SourceLocation getLocEnd() const LLVM_READONLY { 700 // Handle deeply nested case statements with iteration instead of recursion. 701 const CaseStmt *CS = this; 702 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 703 CS = CS2; 704 705 return CS->getSubStmt()->getLocEnd(); 706 } 707 708 static bool classof(const Stmt *T) { 709 return T->getStmtClass() == CaseStmtClass; 710 } 711 712 // Iterators 713 child_range children() { 714 return child_range(&SubExprs[0], &SubExprs[END_EXPR]); 715 } 716}; 717 718class DefaultStmt : public SwitchCase { 719 Stmt* SubStmt; 720public: 721 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 722 SwitchCase(DefaultStmtClass, DL, CL), SubStmt(substmt) {} 723 724 /// \brief Build an empty default statement. 725 explicit DefaultStmt(EmptyShell Empty) 726 : SwitchCase(DefaultStmtClass, Empty) { } 727 728 Stmt *getSubStmt() { return SubStmt; } 729 const Stmt *getSubStmt() const { return SubStmt; } 730 void setSubStmt(Stmt *S) { SubStmt = S; } 731 732 SourceLocation getDefaultLoc() const { return KeywordLoc; } 733 void setDefaultLoc(SourceLocation L) { KeywordLoc = L; } 734 SourceLocation getColonLoc() const { return ColonLoc; } 735 void setColonLoc(SourceLocation L) { ColonLoc = L; } 736 737 SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; } 738 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 739 740 static bool classof(const Stmt *T) { 741 return T->getStmtClass() == DefaultStmtClass; 742 } 743 744 // Iterators 745 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 746}; 747 748inline SourceLocation SwitchCase::getLocEnd() const { 749 if (const CaseStmt *CS = dyn_cast<CaseStmt>(this)) 750 return CS->getLocEnd(); 751 return cast<DefaultStmt>(this)->getLocEnd(); 752} 753 754/// LabelStmt - Represents a label, which has a substatement. For example: 755/// foo: return; 756/// 757class LabelStmt : public Stmt { 758 LabelDecl *TheDecl; 759 Stmt *SubStmt; 760 SourceLocation IdentLoc; 761public: 762 LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt) 763 : Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) { 764 } 765 766 // \brief Build an empty label statement. 767 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 768 769 SourceLocation getIdentLoc() const { return IdentLoc; } 770 LabelDecl *getDecl() const { return TheDecl; } 771 void setDecl(LabelDecl *D) { TheDecl = D; } 772 const char *getName() const; 773 Stmt *getSubStmt() { return SubStmt; } 774 const Stmt *getSubStmt() const { return SubStmt; } 775 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 776 void setSubStmt(Stmt *SS) { SubStmt = SS; } 777 778 SourceLocation getLocStart() const LLVM_READONLY { return IdentLoc; } 779 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 780 781 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 782 783 static bool classof(const Stmt *T) { 784 return T->getStmtClass() == LabelStmtClass; 785 } 786}; 787 788 789/// \brief Represents an attribute applied to a statement. 790/// 791/// Represents an attribute applied to a statement. For example: 792/// [[omp::for(...)]] for (...) { ... } 793/// 794class AttributedStmt : public Stmt { 795 Stmt *SubStmt; 796 SourceLocation AttrLoc; 797 unsigned NumAttrs; 798 const Attr *Attrs[1]; 799 800 friend class ASTStmtReader; 801 802 AttributedStmt(SourceLocation Loc, ArrayRef<const Attr*> Attrs, Stmt *SubStmt) 803 : Stmt(AttributedStmtClass), SubStmt(SubStmt), AttrLoc(Loc), 804 NumAttrs(Attrs.size()) { 805 memcpy(this->Attrs, Attrs.data(), Attrs.size() * sizeof(Attr*)); 806 } 807 808 explicit AttributedStmt(EmptyShell Empty, unsigned NumAttrs) 809 : Stmt(AttributedStmtClass, Empty), NumAttrs(NumAttrs) { 810 memset(Attrs, 0, NumAttrs * sizeof(Attr*)); 811 } 812 813public: 814 static AttributedStmt *Create(ASTContext &C, SourceLocation Loc, 815 ArrayRef<const Attr*> Attrs, Stmt *SubStmt); 816 // \brief Build an empty attributed statement. 817 static AttributedStmt *CreateEmpty(ASTContext &C, unsigned NumAttrs); 818 819 SourceLocation getAttrLoc() const { return AttrLoc; } 820 ArrayRef<const Attr*> getAttrs() const { 821 return ArrayRef<const Attr*>(Attrs, NumAttrs); 822 } 823 Stmt *getSubStmt() { return SubStmt; } 824 const Stmt *getSubStmt() const { return SubStmt; } 825 826 SourceLocation getLocStart() const LLVM_READONLY { return AttrLoc; } 827 SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();} 828 829 child_range children() { return child_range(&SubStmt, &SubStmt + 1); } 830 831 static bool classof(const Stmt *T) { 832 return T->getStmtClass() == AttributedStmtClass; 833 } 834}; 835 836 837/// IfStmt - This represents an if/then/else. 838/// 839class IfStmt : public Stmt { 840 enum { VAR, COND, THEN, ELSE, END_EXPR }; 841 Stmt* SubExprs[END_EXPR]; 842 843 SourceLocation IfLoc; 844 SourceLocation ElseLoc; 845 846public: 847 IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond, 848 Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0); 849 850 /// \brief Build an empty if/then/else statement 851 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 852 853 /// \brief Retrieve the variable declared in this "if" statement, if any. 854 /// 855 /// In the following example, "x" is the condition variable. 856 /// \code 857 /// if (int x = foo()) { 858 /// printf("x is %d", x); 859 /// } 860 /// \endcode 861 VarDecl *getConditionVariable() const; 862 void setConditionVariable(ASTContext &C, VarDecl *V); 863 864 /// If this IfStmt has a condition variable, return the faux DeclStmt 865 /// associated with the creation of that condition variable. 866 const DeclStmt *getConditionVariableDeclStmt() const { 867 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 868 } 869 870 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 871 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 872 const Stmt *getThen() const { return SubExprs[THEN]; } 873 void setThen(Stmt *S) { SubExprs[THEN] = S; } 874 const Stmt *getElse() const { return SubExprs[ELSE]; } 875 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 876 877 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 878 Stmt *getThen() { return SubExprs[THEN]; } 879 Stmt *getElse() { return SubExprs[ELSE]; } 880 881 SourceLocation getIfLoc() const { return IfLoc; } 882 void setIfLoc(SourceLocation L) { IfLoc = L; } 883 SourceLocation getElseLoc() const { return ElseLoc; } 884 void setElseLoc(SourceLocation L) { ElseLoc = L; } 885 886 SourceLocation getLocStart() const LLVM_READONLY { return IfLoc; } 887 SourceLocation getLocEnd() const LLVM_READONLY { 888 if (SubExprs[ELSE]) 889 return SubExprs[ELSE]->getLocEnd(); 890 else 891 return SubExprs[THEN]->getLocEnd(); 892 } 893 894 // Iterators over subexpressions. The iterators will include iterating 895 // over the initialization expression referenced by the condition variable. 896 child_range children() { 897 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 898 } 899 900 static bool classof(const Stmt *T) { 901 return T->getStmtClass() == IfStmtClass; 902 } 903}; 904 905/// SwitchStmt - This represents a 'switch' stmt. 906/// 907class SwitchStmt : public Stmt { 908 enum { VAR, COND, BODY, END_EXPR }; 909 Stmt* SubExprs[END_EXPR]; 910 // This points to a linked list of case and default statements. 911 SwitchCase *FirstCase; 912 SourceLocation SwitchLoc; 913 914 /// If the SwitchStmt is a switch on an enum value, this records whether 915 /// all the enum values were covered by CaseStmts. This value is meant to 916 /// be a hint for possible clients. 917 unsigned AllEnumCasesCovered : 1; 918 919public: 920 SwitchStmt(ASTContext &C, VarDecl *Var, Expr *cond); 921 922 /// \brief Build a empty switch statement. 923 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 924 925 /// \brief Retrieve the variable declared in this "switch" statement, if any. 926 /// 927 /// In the following example, "x" is the condition variable. 928 /// \code 929 /// switch (int x = foo()) { 930 /// case 0: break; 931 /// // ... 932 /// } 933 /// \endcode 934 VarDecl *getConditionVariable() const; 935 void setConditionVariable(ASTContext &C, VarDecl *V); 936 937 /// If this SwitchStmt has a condition variable, return the faux DeclStmt 938 /// associated with the creation of that condition variable. 939 const DeclStmt *getConditionVariableDeclStmt() const { 940 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 941 } 942 943 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 944 const Stmt *getBody() const { return SubExprs[BODY]; } 945 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 946 947 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 948 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 949 Stmt *getBody() { return SubExprs[BODY]; } 950 void setBody(Stmt *S) { SubExprs[BODY] = S; } 951 SwitchCase *getSwitchCaseList() { return FirstCase; } 952 953 /// \brief Set the case list for this switch statement. 954 /// 955 /// The caller is responsible for incrementing the retain counts on 956 /// all of the SwitchCase statements in this list. 957 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 958 959 SourceLocation getSwitchLoc() const { return SwitchLoc; } 960 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 961 962 void setBody(Stmt *S, SourceLocation SL) { 963 SubExprs[BODY] = S; 964 SwitchLoc = SL; 965 } 966 void addSwitchCase(SwitchCase *SC) { 967 assert(!SC->getNextSwitchCase() 968 && "case/default already added to a switch"); 969 SC->setNextSwitchCase(FirstCase); 970 FirstCase = SC; 971 } 972 973 /// Set a flag in the SwitchStmt indicating that if the 'switch (X)' is a 974 /// switch over an enum value then all cases have been explicitly covered. 975 void setAllEnumCasesCovered() { 976 AllEnumCasesCovered = 1; 977 } 978 979 /// Returns true if the SwitchStmt is a switch of an enum value and all cases 980 /// have been explicitly covered. 981 bool isAllEnumCasesCovered() const { 982 return (bool) AllEnumCasesCovered; 983 } 984 985 SourceLocation getLocStart() const LLVM_READONLY { return SwitchLoc; } 986 SourceLocation getLocEnd() const LLVM_READONLY { 987 return SubExprs[BODY]->getLocEnd(); 988 } 989 990 // Iterators 991 child_range children() { 992 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 993 } 994 995 static bool classof(const Stmt *T) { 996 return T->getStmtClass() == SwitchStmtClass; 997 } 998}; 999 1000 1001/// WhileStmt - This represents a 'while' stmt. 1002/// 1003class WhileStmt : public Stmt { 1004 enum { VAR, COND, BODY, END_EXPR }; 1005 Stmt* SubExprs[END_EXPR]; 1006 SourceLocation WhileLoc; 1007public: 1008 WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body, 1009 SourceLocation WL); 1010 1011 /// \brief Build an empty while statement. 1012 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 1013 1014 /// \brief Retrieve the variable declared in this "while" statement, if any. 1015 /// 1016 /// In the following example, "x" is the condition variable. 1017 /// \code 1018 /// while (int x = random()) { 1019 /// // ... 1020 /// } 1021 /// \endcode 1022 VarDecl *getConditionVariable() const; 1023 void setConditionVariable(ASTContext &C, VarDecl *V); 1024 1025 /// If this WhileStmt has a condition variable, return the faux DeclStmt 1026 /// associated with the creation of that condition variable. 1027 const DeclStmt *getConditionVariableDeclStmt() const { 1028 return reinterpret_cast<DeclStmt*>(SubExprs[VAR]); 1029 } 1030 1031 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1032 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1033 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1034 Stmt *getBody() { return SubExprs[BODY]; } 1035 const Stmt *getBody() const { return SubExprs[BODY]; } 1036 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1037 1038 SourceLocation getWhileLoc() const { return WhileLoc; } 1039 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1040 1041 SourceLocation getLocStart() const LLVM_READONLY { return WhileLoc; } 1042 SourceLocation getLocEnd() const LLVM_READONLY { 1043 return SubExprs[BODY]->getLocEnd(); 1044 } 1045 1046 static bool classof(const Stmt *T) { 1047 return T->getStmtClass() == WhileStmtClass; 1048 } 1049 1050 // Iterators 1051 child_range children() { 1052 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1053 } 1054}; 1055 1056/// DoStmt - This represents a 'do/while' stmt. 1057/// 1058class DoStmt : public Stmt { 1059 enum { BODY, COND, END_EXPR }; 1060 Stmt* SubExprs[END_EXPR]; 1061 SourceLocation DoLoc; 1062 SourceLocation WhileLoc; 1063 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 1064 1065public: 1066 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 1067 SourceLocation RP) 1068 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 1069 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 1070 SubExprs[BODY] = body; 1071 } 1072 1073 /// \brief Build an empty do-while statement. 1074 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 1075 1076 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1077 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1078 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1079 Stmt *getBody() { return SubExprs[BODY]; } 1080 const Stmt *getBody() const { return SubExprs[BODY]; } 1081 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1082 1083 SourceLocation getDoLoc() const { return DoLoc; } 1084 void setDoLoc(SourceLocation L) { DoLoc = L; } 1085 SourceLocation getWhileLoc() const { return WhileLoc; } 1086 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 1087 1088 SourceLocation getRParenLoc() const { return RParenLoc; } 1089 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1090 1091 SourceLocation getLocStart() const LLVM_READONLY { return DoLoc; } 1092 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1093 1094 static bool classof(const Stmt *T) { 1095 return T->getStmtClass() == DoStmtClass; 1096 } 1097 1098 // Iterators 1099 child_range children() { 1100 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1101 } 1102}; 1103 1104 1105/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 1106/// the init/cond/inc parts of the ForStmt will be null if they were not 1107/// specified in the source. 1108/// 1109class ForStmt : public Stmt { 1110 enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR }; 1111 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 1112 SourceLocation ForLoc; 1113 SourceLocation LParenLoc, RParenLoc; 1114 1115public: 1116 ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc, 1117 Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP); 1118 1119 /// \brief Build an empty for statement. 1120 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 1121 1122 Stmt *getInit() { return SubExprs[INIT]; } 1123 1124 /// \brief Retrieve the variable declared in this "for" statement, if any. 1125 /// 1126 /// In the following example, "y" is the condition variable. 1127 /// \code 1128 /// for (int x = random(); int y = mangle(x); ++x) { 1129 /// // ... 1130 /// } 1131 /// \endcode 1132 VarDecl *getConditionVariable() const; 1133 void setConditionVariable(ASTContext &C, VarDecl *V); 1134 1135 /// If this ForStmt has a condition variable, return the faux DeclStmt 1136 /// associated with the creation of that condition variable. 1137 const DeclStmt *getConditionVariableDeclStmt() const { 1138 return reinterpret_cast<DeclStmt*>(SubExprs[CONDVAR]); 1139 } 1140 1141 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 1142 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1143 Stmt *getBody() { return SubExprs[BODY]; } 1144 1145 const Stmt *getInit() const { return SubExprs[INIT]; } 1146 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 1147 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 1148 const Stmt *getBody() const { return SubExprs[BODY]; } 1149 1150 void setInit(Stmt *S) { SubExprs[INIT] = S; } 1151 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 1152 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 1153 void setBody(Stmt *S) { SubExprs[BODY] = S; } 1154 1155 SourceLocation getForLoc() const { return ForLoc; } 1156 void setForLoc(SourceLocation L) { ForLoc = L; } 1157 SourceLocation getLParenLoc() const { return LParenLoc; } 1158 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1159 SourceLocation getRParenLoc() const { return RParenLoc; } 1160 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1161 1162 SourceLocation getLocStart() const LLVM_READONLY { return ForLoc; } 1163 SourceLocation getLocEnd() const LLVM_READONLY { 1164 return SubExprs[BODY]->getLocEnd(); 1165 } 1166 1167 static bool classof(const Stmt *T) { 1168 return T->getStmtClass() == ForStmtClass; 1169 } 1170 1171 // Iterators 1172 child_range children() { 1173 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 1174 } 1175}; 1176 1177/// GotoStmt - This represents a direct goto. 1178/// 1179class GotoStmt : public Stmt { 1180 LabelDecl *Label; 1181 SourceLocation GotoLoc; 1182 SourceLocation LabelLoc; 1183public: 1184 GotoStmt(LabelDecl *label, SourceLocation GL, SourceLocation LL) 1185 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 1186 1187 /// \brief Build an empty goto statement. 1188 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 1189 1190 LabelDecl *getLabel() const { return Label; } 1191 void setLabel(LabelDecl *D) { Label = D; } 1192 1193 SourceLocation getGotoLoc() const { return GotoLoc; } 1194 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1195 SourceLocation getLabelLoc() const { return LabelLoc; } 1196 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 1197 1198 SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; } 1199 SourceLocation getLocEnd() const LLVM_READONLY { return LabelLoc; } 1200 1201 static bool classof(const Stmt *T) { 1202 return T->getStmtClass() == GotoStmtClass; 1203 } 1204 1205 // Iterators 1206 child_range children() { return child_range(); } 1207}; 1208 1209/// IndirectGotoStmt - This represents an indirect goto. 1210/// 1211class IndirectGotoStmt : public Stmt { 1212 SourceLocation GotoLoc; 1213 SourceLocation StarLoc; 1214 Stmt *Target; 1215public: 1216 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 1217 Expr *target) 1218 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 1219 Target((Stmt*)target) {} 1220 1221 /// \brief Build an empty indirect goto statement. 1222 explicit IndirectGotoStmt(EmptyShell Empty) 1223 : Stmt(IndirectGotoStmtClass, Empty) { } 1224 1225 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1226 SourceLocation getGotoLoc() const { return GotoLoc; } 1227 void setStarLoc(SourceLocation L) { StarLoc = L; } 1228 SourceLocation getStarLoc() const { return StarLoc; } 1229 1230 Expr *getTarget() { return reinterpret_cast<Expr*>(Target); } 1231 const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);} 1232 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 1233 1234 /// getConstantTarget - Returns the fixed target of this indirect 1235 /// goto, if one exists. 1236 LabelDecl *getConstantTarget(); 1237 const LabelDecl *getConstantTarget() const { 1238 return const_cast<IndirectGotoStmt*>(this)->getConstantTarget(); 1239 } 1240 1241 SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; } 1242 SourceLocation getLocEnd() const LLVM_READONLY { return Target->getLocEnd(); } 1243 1244 static bool classof(const Stmt *T) { 1245 return T->getStmtClass() == IndirectGotoStmtClass; 1246 } 1247 1248 // Iterators 1249 child_range children() { return child_range(&Target, &Target+1); } 1250}; 1251 1252 1253/// ContinueStmt - This represents a continue. 1254/// 1255class ContinueStmt : public Stmt { 1256 SourceLocation ContinueLoc; 1257public: 1258 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 1259 1260 /// \brief Build an empty continue statement. 1261 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 1262 1263 SourceLocation getContinueLoc() const { return ContinueLoc; } 1264 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 1265 1266 SourceLocation getLocStart() const LLVM_READONLY { return ContinueLoc; } 1267 SourceLocation getLocEnd() const LLVM_READONLY { return ContinueLoc; } 1268 1269 static bool classof(const Stmt *T) { 1270 return T->getStmtClass() == ContinueStmtClass; 1271 } 1272 1273 // Iterators 1274 child_range children() { return child_range(); } 1275}; 1276 1277/// BreakStmt - This represents a break. 1278/// 1279class BreakStmt : public Stmt { 1280 SourceLocation BreakLoc; 1281public: 1282 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 1283 1284 /// \brief Build an empty break statement. 1285 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 1286 1287 SourceLocation getBreakLoc() const { return BreakLoc; } 1288 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 1289 1290 SourceLocation getLocStart() const LLVM_READONLY { return BreakLoc; } 1291 SourceLocation getLocEnd() const LLVM_READONLY { return BreakLoc; } 1292 1293 static bool classof(const Stmt *T) { 1294 return T->getStmtClass() == BreakStmtClass; 1295 } 1296 1297 // Iterators 1298 child_range children() { return child_range(); } 1299}; 1300 1301 1302/// ReturnStmt - This represents a return, optionally of an expression: 1303/// return; 1304/// return 4; 1305/// 1306/// Note that GCC allows return with no argument in a function declared to 1307/// return a value, and it allows returning a value in functions declared to 1308/// return void. We explicitly model this in the AST, which means you can't 1309/// depend on the return type of the function and the presence of an argument. 1310/// 1311class ReturnStmt : public Stmt { 1312 Stmt *RetExpr; 1313 SourceLocation RetLoc; 1314 const VarDecl *NRVOCandidate; 1315 1316public: 1317 ReturnStmt(SourceLocation RL) 1318 : Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { } 1319 1320 ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate) 1321 : Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL), 1322 NRVOCandidate(NRVOCandidate) {} 1323 1324 /// \brief Build an empty return expression. 1325 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1326 1327 const Expr *getRetValue() const; 1328 Expr *getRetValue(); 1329 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1330 1331 SourceLocation getReturnLoc() const { return RetLoc; } 1332 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1333 1334 /// \brief Retrieve the variable that might be used for the named return 1335 /// value optimization. 1336 /// 1337 /// The optimization itself can only be performed if the variable is 1338 /// also marked as an NRVO object. 1339 const VarDecl *getNRVOCandidate() const { return NRVOCandidate; } 1340 void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; } 1341 1342 SourceLocation getLocStart() const LLVM_READONLY { return RetLoc; } 1343 SourceLocation getLocEnd() const LLVM_READONLY { 1344 return RetExpr ? RetExpr->getLocEnd() : RetLoc; 1345 } 1346 1347 static bool classof(const Stmt *T) { 1348 return T->getStmtClass() == ReturnStmtClass; 1349 } 1350 1351 // Iterators 1352 child_range children() { 1353 if (RetExpr) return child_range(&RetExpr, &RetExpr+1); 1354 return child_range(); 1355 } 1356}; 1357 1358/// AsmStmt is the base class for GCCAsmStmt and MSAsmStmt. 1359/// 1360class AsmStmt : public Stmt { 1361protected: 1362 SourceLocation AsmLoc; 1363 /// \brief True if the assembly statement does not have any input or output 1364 /// operands. 1365 bool IsSimple; 1366 1367 /// \brief If true, treat this inline assembly as having side effects. 1368 /// This assembly statement should not be optimized, deleted or moved. 1369 bool IsVolatile; 1370 1371 unsigned NumOutputs; 1372 unsigned NumInputs; 1373 unsigned NumClobbers; 1374 1375 IdentifierInfo **Names; 1376 Stmt **Exprs; 1377 1378 AsmStmt(StmtClass SC, SourceLocation asmloc, bool issimple, bool isvolatile, 1379 unsigned numoutputs, unsigned numinputs, unsigned numclobbers) : 1380 Stmt (SC), AsmLoc(asmloc), IsSimple(issimple), IsVolatile(isvolatile), 1381 NumOutputs(numoutputs), NumInputs(numinputs), NumClobbers(numclobbers) { } 1382 1383public: 1384 /// \brief Build an empty inline-assembly statement. 1385 explicit AsmStmt(StmtClass SC, EmptyShell Empty) : 1386 Stmt(SC, Empty), Names(0), Exprs(0) { } 1387 1388 SourceLocation getAsmLoc() const { return AsmLoc; } 1389 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1390 1391 bool isSimple() const { return IsSimple; } 1392 void setSimple(bool V) { IsSimple = V; } 1393 1394 bool isVolatile() const { return IsVolatile; } 1395 void setVolatile(bool V) { IsVolatile = V; } 1396 1397 SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); } 1398 SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); } 1399 1400 //===--- Asm String Analysis ---===// 1401 1402 /// Assemble final IR asm string. 1403 std::string generateAsmString(ASTContext &C) const; 1404 1405 //===--- Output operands ---===// 1406 1407 unsigned getNumOutputs() const { return NumOutputs; } 1408 1409 IdentifierInfo *getOutputIdentifier(unsigned i) const { 1410 return Names[i]; 1411 } 1412 1413 StringRef getOutputName(unsigned i) const { 1414 if (IdentifierInfo *II = getOutputIdentifier(i)) 1415 return II->getName(); 1416 1417 return StringRef(); 1418 } 1419 1420 /// getOutputConstraint - Return the constraint string for the specified 1421 /// output operand. All output constraints are known to be non-empty (either 1422 /// '=' or '+'). 1423 StringRef getOutputConstraint(unsigned i) const; 1424 1425 /// isOutputPlusConstraint - Return true if the specified output constraint 1426 /// is a "+" constraint (which is both an input and an output) or false if it 1427 /// is an "=" constraint (just an output). 1428 bool isOutputPlusConstraint(unsigned i) const { 1429 return getOutputConstraint(i)[0] == '+'; 1430 } 1431 1432 const Expr *getOutputExpr(unsigned i) const; 1433 1434 /// getNumPlusOperands - Return the number of output operands that have a "+" 1435 /// constraint. 1436 unsigned getNumPlusOperands() const; 1437 1438 //===--- Input operands ---===// 1439 1440 unsigned getNumInputs() const { return NumInputs; } 1441 1442 IdentifierInfo *getInputIdentifier(unsigned i) const { 1443 return Names[i + NumOutputs]; 1444 } 1445 1446 StringRef getInputName(unsigned i) const { 1447 if (IdentifierInfo *II = getInputIdentifier(i)) 1448 return II->getName(); 1449 1450 return StringRef(); 1451 } 1452 1453 /// getInputConstraint - Return the specified input constraint. Unlike output 1454 /// constraints, these can be empty. 1455 StringRef getInputConstraint(unsigned i) const; 1456 1457 const Expr *getInputExpr(unsigned i) const; 1458 1459 //===--- Other ---===// 1460 1461 unsigned getNumClobbers() const { return NumClobbers; } 1462 StringRef getClobber(unsigned i) const; 1463 1464 static bool classof(const Stmt *T) { 1465 return T->getStmtClass() == GCCAsmStmtClass || 1466 T->getStmtClass() == MSAsmStmtClass; 1467 } 1468 1469 // Input expr iterators. 1470 1471 typedef ExprIterator inputs_iterator; 1472 typedef ConstExprIterator const_inputs_iterator; 1473 1474 inputs_iterator begin_inputs() { 1475 return &Exprs[0] + NumOutputs; 1476 } 1477 1478 inputs_iterator end_inputs() { 1479 return &Exprs[0] + NumOutputs + NumInputs; 1480 } 1481 1482 const_inputs_iterator begin_inputs() const { 1483 return &Exprs[0] + NumOutputs; 1484 } 1485 1486 const_inputs_iterator end_inputs() const { 1487 return &Exprs[0] + NumOutputs + NumInputs; 1488 } 1489 1490 // Output expr iterators. 1491 1492 typedef ExprIterator outputs_iterator; 1493 typedef ConstExprIterator const_outputs_iterator; 1494 1495 outputs_iterator begin_outputs() { 1496 return &Exprs[0]; 1497 } 1498 outputs_iterator end_outputs() { 1499 return &Exprs[0] + NumOutputs; 1500 } 1501 1502 const_outputs_iterator begin_outputs() const { 1503 return &Exprs[0]; 1504 } 1505 const_outputs_iterator end_outputs() const { 1506 return &Exprs[0] + NumOutputs; 1507 } 1508 1509 child_range children() { 1510 return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs); 1511 } 1512}; 1513 1514/// This represents a GCC inline-assembly statement extension. 1515/// 1516class GCCAsmStmt : public AsmStmt { 1517 SourceLocation RParenLoc; 1518 StringLiteral *AsmStr; 1519 1520 // FIXME: If we wanted to, we could allocate all of these in one big array. 1521 StringLiteral **Constraints; 1522 StringLiteral **Clobbers; 1523 1524public: 1525 GCCAsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, 1526 bool isvolatile, unsigned numoutputs, unsigned numinputs, 1527 IdentifierInfo **names, StringLiteral **constraints, Expr **exprs, 1528 StringLiteral *asmstr, unsigned numclobbers, 1529 StringLiteral **clobbers, SourceLocation rparenloc); 1530 1531 /// \brief Build an empty inline-assembly statement. 1532 explicit GCCAsmStmt(EmptyShell Empty) : AsmStmt(GCCAsmStmtClass, Empty), 1533 Constraints(0), Clobbers(0) { } 1534 1535 SourceLocation getRParenLoc() const { return RParenLoc; } 1536 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1537 1538 //===--- Asm String Analysis ---===// 1539 1540 const StringLiteral *getAsmString() const { return AsmStr; } 1541 StringLiteral *getAsmString() { return AsmStr; } 1542 void setAsmString(StringLiteral *E) { AsmStr = E; } 1543 1544 /// AsmStringPiece - this is part of a decomposed asm string specification 1545 /// (for use with the AnalyzeAsmString function below). An asm string is 1546 /// considered to be a concatenation of these parts. 1547 class AsmStringPiece { 1548 public: 1549 enum Kind { 1550 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1551 Operand // Operand reference, with optional modifier %c4. 1552 }; 1553 private: 1554 Kind MyKind; 1555 std::string Str; 1556 unsigned OperandNo; 1557 public: 1558 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1559 AsmStringPiece(unsigned OpNo, char Modifier) 1560 : MyKind(Operand), Str(), OperandNo(OpNo) { 1561 Str += Modifier; 1562 } 1563 1564 bool isString() const { return MyKind == String; } 1565 bool isOperand() const { return MyKind == Operand; } 1566 1567 const std::string &getString() const { 1568 assert(isString()); 1569 return Str; 1570 } 1571 1572 unsigned getOperandNo() const { 1573 assert(isOperand()); 1574 return OperandNo; 1575 } 1576 1577 /// getModifier - Get the modifier for this operand, if present. This 1578 /// returns '\0' if there was no modifier. 1579 char getModifier() const { 1580 assert(isOperand()); 1581 return Str[0]; 1582 } 1583 }; 1584 1585 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1586 /// it into pieces. If the asm string is erroneous, emit errors and return 1587 /// true, otherwise return false. This handles canonicalization and 1588 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1589 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1590 unsigned AnalyzeAsmString(SmallVectorImpl<AsmStringPiece> &Pieces, 1591 ASTContext &C, unsigned &DiagOffs) const; 1592 1593 /// Assemble final IR asm string. 1594 std::string generateAsmString(ASTContext &C) const; 1595 1596 //===--- Output operands ---===// 1597 1598 StringRef getOutputConstraint(unsigned i) const; 1599 1600 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1601 return Constraints[i]; 1602 } 1603 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1604 return Constraints[i]; 1605 } 1606 1607 Expr *getOutputExpr(unsigned i); 1608 1609 const Expr *getOutputExpr(unsigned i) const { 1610 return const_cast<GCCAsmStmt*>(this)->getOutputExpr(i); 1611 } 1612 1613 //===--- Input operands ---===// 1614 1615 StringRef getInputConstraint(unsigned i) const; 1616 1617 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1618 return Constraints[i + NumOutputs]; 1619 } 1620 StringLiteral *getInputConstraintLiteral(unsigned i) { 1621 return Constraints[i + NumOutputs]; 1622 } 1623 1624 Expr *getInputExpr(unsigned i); 1625 void setInputExpr(unsigned i, Expr *E); 1626 1627 const Expr *getInputExpr(unsigned i) const { 1628 return const_cast<GCCAsmStmt*>(this)->getInputExpr(i); 1629 } 1630 1631 void setOutputsAndInputsAndClobbers(ASTContext &C, 1632 IdentifierInfo **Names, 1633 StringLiteral **Constraints, 1634 Stmt **Exprs, 1635 unsigned NumOutputs, 1636 unsigned NumInputs, 1637 StringLiteral **Clobbers, 1638 unsigned NumClobbers); 1639 1640 //===--- Other ---===// 1641 1642 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1643 /// translate this into a numeric value needed to reference the same operand. 1644 /// This returns -1 if the operand name is invalid. 1645 int getNamedOperand(StringRef SymbolicName) const; 1646 1647 StringRef getClobber(unsigned i) const; 1648 StringLiteral *getClobberStringLiteral(unsigned i) { return Clobbers[i]; } 1649 const StringLiteral *getClobberStringLiteral(unsigned i) const { 1650 return Clobbers[i]; 1651 } 1652 1653 SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; } 1654 SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; } 1655 1656 static bool classof(const Stmt *T) { 1657 return T->getStmtClass() == GCCAsmStmtClass; 1658 } 1659}; 1660 1661/// This represents a Microsoft inline-assembly statement extension. 1662/// 1663class MSAsmStmt : public AsmStmt { 1664 SourceLocation AsmLoc, LBraceLoc, EndLoc; 1665 std::string AsmStr; 1666 1667 unsigned NumAsmToks; 1668 1669 Token *AsmToks; 1670 StringRef *Constraints; 1671 StringRef *Clobbers; 1672 1673public: 1674 MSAsmStmt(ASTContext &C, SourceLocation asmloc, SourceLocation lbraceloc, 1675 bool issimple, bool isvolatile, ArrayRef<Token> asmtoks, 1676 unsigned numoutputs, unsigned numinputs, 1677 ArrayRef<IdentifierInfo*> names, ArrayRef<StringRef> constraints, 1678 ArrayRef<Expr*> exprs, StringRef asmstr, 1679 ArrayRef<StringRef> clobbers, SourceLocation endloc); 1680 1681 /// \brief Build an empty MS-style inline-assembly statement. 1682 explicit MSAsmStmt(EmptyShell Empty) : AsmStmt(MSAsmStmtClass, Empty), 1683 NumAsmToks(0), AsmToks(0), Constraints(0), Clobbers(0) { } 1684 1685 SourceLocation getLBraceLoc() const { return LBraceLoc; } 1686 void setLBraceLoc(SourceLocation L) { LBraceLoc = L; } 1687 SourceLocation getEndLoc() const { return EndLoc; } 1688 void setEndLoc(SourceLocation L) { EndLoc = L; } 1689 1690 bool hasBraces() const { return LBraceLoc.isValid(); } 1691 1692 unsigned getNumAsmToks() { return NumAsmToks; } 1693 Token *getAsmToks() { return AsmToks; } 1694 1695 //===--- Asm String Analysis ---===// 1696 1697 const std::string *getAsmString() const { return &AsmStr; } 1698 std::string *getAsmString() { return &AsmStr; } 1699 void setAsmString(StringRef &E) { AsmStr = E.str(); } 1700 1701 /// Assemble final IR asm string. 1702 std::string generateAsmString(ASTContext &C) const; 1703 1704 //===--- Output operands ---===// 1705 1706 StringRef getOutputConstraint(unsigned i) const { 1707 return Constraints[i]; 1708 } 1709 1710 Expr *getOutputExpr(unsigned i); 1711 1712 const Expr *getOutputExpr(unsigned i) const { 1713 return const_cast<MSAsmStmt*>(this)->getOutputExpr(i); 1714 } 1715 1716 //===--- Input operands ---===// 1717 1718 StringRef getInputConstraint(unsigned i) const { 1719 return Constraints[i + NumOutputs]; 1720 } 1721 1722 Expr *getInputExpr(unsigned i); 1723 void setInputExpr(unsigned i, Expr *E); 1724 1725 const Expr *getInputExpr(unsigned i) const { 1726 return const_cast<MSAsmStmt*>(this)->getInputExpr(i); 1727 } 1728 1729 //===--- Other ---===// 1730 1731 StringRef getClobber(unsigned i) const { return Clobbers[i]; } 1732 1733 SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; } 1734 SourceLocation getLocEnd() const LLVM_READONLY { return EndLoc; } 1735 1736 static bool classof(const Stmt *T) { 1737 return T->getStmtClass() == MSAsmStmtClass; 1738 } 1739 1740 child_range children() { 1741 return child_range(&Exprs[0], &Exprs[0]); 1742 } 1743}; 1744 1745class SEHExceptStmt : public Stmt { 1746 SourceLocation Loc; 1747 Stmt *Children[2]; 1748 1749 enum { FILTER_EXPR, BLOCK }; 1750 1751 SEHExceptStmt(SourceLocation Loc, 1752 Expr *FilterExpr, 1753 Stmt *Block); 1754 1755 friend class ASTReader; 1756 friend class ASTStmtReader; 1757 explicit SEHExceptStmt(EmptyShell E) : Stmt(SEHExceptStmtClass, E) { } 1758 1759public: 1760 static SEHExceptStmt* Create(ASTContext &C, 1761 SourceLocation ExceptLoc, 1762 Expr *FilterExpr, 1763 Stmt *Block); 1764 1765 SourceLocation getLocStart() const LLVM_READONLY { return getExceptLoc(); } 1766 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1767 1768 SourceLocation getExceptLoc() const { return Loc; } 1769 SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); } 1770 1771 Expr *getFilterExpr() const { 1772 return reinterpret_cast<Expr*>(Children[FILTER_EXPR]); 1773 } 1774 1775 CompoundStmt *getBlock() const { 1776 return cast<CompoundStmt>(Children[BLOCK]); 1777 } 1778 1779 child_range children() { 1780 return child_range(Children,Children+2); 1781 } 1782 1783 static bool classof(const Stmt *T) { 1784 return T->getStmtClass() == SEHExceptStmtClass; 1785 } 1786 1787}; 1788 1789class SEHFinallyStmt : public Stmt { 1790 SourceLocation Loc; 1791 Stmt *Block; 1792 1793 SEHFinallyStmt(SourceLocation Loc, 1794 Stmt *Block); 1795 1796 friend class ASTReader; 1797 friend class ASTStmtReader; 1798 explicit SEHFinallyStmt(EmptyShell E) : Stmt(SEHFinallyStmtClass, E) { } 1799 1800public: 1801 static SEHFinallyStmt* Create(ASTContext &C, 1802 SourceLocation FinallyLoc, 1803 Stmt *Block); 1804 1805 SourceLocation getLocStart() const LLVM_READONLY { return getFinallyLoc(); } 1806 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1807 1808 SourceLocation getFinallyLoc() const { return Loc; } 1809 SourceLocation getEndLoc() const { return Block->getLocEnd(); } 1810 1811 CompoundStmt *getBlock() const { return cast<CompoundStmt>(Block); } 1812 1813 child_range children() { 1814 return child_range(&Block,&Block+1); 1815 } 1816 1817 static bool classof(const Stmt *T) { 1818 return T->getStmtClass() == SEHFinallyStmtClass; 1819 } 1820 1821}; 1822 1823class SEHTryStmt : public Stmt { 1824 bool IsCXXTry; 1825 SourceLocation TryLoc; 1826 Stmt *Children[2]; 1827 1828 enum { TRY = 0, HANDLER = 1 }; 1829 1830 SEHTryStmt(bool isCXXTry, // true if 'try' otherwise '__try' 1831 SourceLocation TryLoc, 1832 Stmt *TryBlock, 1833 Stmt *Handler); 1834 1835 friend class ASTReader; 1836 friend class ASTStmtReader; 1837 explicit SEHTryStmt(EmptyShell E) : Stmt(SEHTryStmtClass, E) { } 1838 1839public: 1840 static SEHTryStmt* Create(ASTContext &C, 1841 bool isCXXTry, 1842 SourceLocation TryLoc, 1843 Stmt *TryBlock, 1844 Stmt *Handler); 1845 1846 SourceLocation getLocStart() const LLVM_READONLY { return getTryLoc(); } 1847 SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); } 1848 1849 SourceLocation getTryLoc() const { return TryLoc; } 1850 SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); } 1851 1852 bool getIsCXXTry() const { return IsCXXTry; } 1853 1854 CompoundStmt* getTryBlock() const { 1855 return cast<CompoundStmt>(Children[TRY]); 1856 } 1857 1858 Stmt *getHandler() const { return Children[HANDLER]; } 1859 1860 /// Returns 0 if not defined 1861 SEHExceptStmt *getExceptHandler() const; 1862 SEHFinallyStmt *getFinallyHandler() const; 1863 1864 child_range children() { 1865 return child_range(Children,Children+2); 1866 } 1867 1868 static bool classof(const Stmt *T) { 1869 return T->getStmtClass() == SEHTryStmtClass; 1870 } 1871}; 1872 1873} // end namespace clang 1874 1875#endif 1876