Expr.h revision 8e6285af719adc6f86d6faa235d22a08eb68ee3a
1//===--- Expr.h - Classes for representing expressions ----------*- 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 Expr interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPR_H 15#define LLVM_CLANG_AST_EXPR_H 16 17#include "clang/AST/APValue.h" 18#include "clang/AST/Stmt.h" 19#include "clang/AST/Type.h" 20#include "clang/AST/DeclAccessPair.h" 21#include "clang/AST/OperationKinds.h" 22#include "clang/AST/ASTVector.h" 23#include "clang/AST/UsuallyTinyPtrVector.h" 24#include "llvm/ADT/APSInt.h" 25#include "llvm/ADT/APFloat.h" 26#include "llvm/ADT/SmallVector.h" 27#include "llvm/ADT/StringRef.h" 28#include <vector> 29 30namespace clang { 31 class ASTContext; 32 class APValue; 33 class Decl; 34 class IdentifierInfo; 35 class ParmVarDecl; 36 class NamedDecl; 37 class ValueDecl; 38 class BlockDecl; 39 class CXXBaseSpecifier; 40 class CXXOperatorCallExpr; 41 class CXXMemberCallExpr; 42 class TemplateArgumentLoc; 43 class TemplateArgumentListInfo; 44 45/// \brief A simple array of base specifiers. 46typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 47 48/// Expr - This represents one expression. Note that Expr's are subclasses of 49/// Stmt. This allows an expression to be transparently used any place a Stmt 50/// is required. 51/// 52class Expr : public Stmt { 53 QualType TR; 54 55 virtual void ANCHOR(); // key function. 56 57protected: 58 Expr(StmtClass SC, QualType T, bool TD, bool VD) : Stmt(SC) { 59 ExprBits.TypeDependent = TD; 60 ExprBits.ValueDependent = VD; 61 ExprBits.ValueKind = 0; 62 setType(T); 63 } 64 65 /// \brief Construct an empty expression. 66 explicit Expr(StmtClass SC, EmptyShell) : Stmt(SC) { } 67 68 /// getValueKind - The value kind that this cast produces. 69 ExprValueKind getValueKind() const { 70 return static_cast<ExprValueKind>(ExprBits.ValueKind); 71 } 72 73 /// setValueKind - Set the value kind this cast produces. 74 void setValueKind(ExprValueKind Cat) { ExprBits.ValueKind = Cat; } 75 76public: 77 QualType getType() const { return TR; } 78 void setType(QualType t) { 79 // In C++, the type of an expression is always adjusted so that it 80 // will not have reference type an expression will never have 81 // reference type (C++ [expr]p6). Use 82 // QualType::getNonReferenceType() to retrieve the non-reference 83 // type. Additionally, inspect Expr::isLvalue to determine whether 84 // an expression that is adjusted in this manner should be 85 // considered an lvalue. 86 assert((t.isNull() || !t->isReferenceType()) && 87 "Expressions can't have reference type"); 88 89 TR = t; 90 } 91 92 /// isValueDependent - Determines whether this expression is 93 /// value-dependent (C++ [temp.dep.constexpr]). For example, the 94 /// array bound of "Chars" in the following example is 95 /// value-dependent. 96 /// @code 97 /// template<int Size, char (&Chars)[Size]> struct meta_string; 98 /// @endcode 99 bool isValueDependent() const { return ExprBits.ValueDependent; } 100 101 /// \brief Set whether this expression is value-dependent or not. 102 void setValueDependent(bool VD) { ExprBits.ValueDependent = VD; } 103 104 /// isTypeDependent - Determines whether this expression is 105 /// type-dependent (C++ [temp.dep.expr]), which means that its type 106 /// could change from one template instantiation to the next. For 107 /// example, the expressions "x" and "x + y" are type-dependent in 108 /// the following code, but "y" is not type-dependent: 109 /// @code 110 /// template<typename T> 111 /// void add(T x, int y) { 112 /// x + y; 113 /// } 114 /// @endcode 115 bool isTypeDependent() const { return ExprBits.TypeDependent; } 116 117 /// \brief Set whether this expression is type-dependent or not. 118 void setTypeDependent(bool TD) { ExprBits.TypeDependent = TD; } 119 120 /// SourceLocation tokens are not useful in isolation - they are low level 121 /// value objects created/interpreted by SourceManager. We assume AST 122 /// clients will have a pointer to the respective SourceManager. 123 virtual SourceRange getSourceRange() const = 0; 124 125 /// getExprLoc - Return the preferred location for the arrow when diagnosing 126 /// a problem with a generic expression. 127 virtual SourceLocation getExprLoc() const { return getLocStart(); } 128 129 /// isUnusedResultAWarning - Return true if this immediate expression should 130 /// be warned about if the result is unused. If so, fill in Loc and Ranges 131 /// with location to warn on and the source range[s] to report with the 132 /// warning. 133 bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, 134 SourceRange &R2, ASTContext &Ctx) const; 135 136 /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or 137 /// incomplete type other than void. Nonarray expressions that can be lvalues: 138 /// - name, where name must be a variable 139 /// - e[i] 140 /// - (e), where e must be an lvalue 141 /// - e.name, where e must be an lvalue 142 /// - e->name 143 /// - *e, the type of e cannot be a function type 144 /// - string-constant 145 /// - reference type [C++ [expr]] 146 /// - b ? x : y, where x and y are lvalues of suitable types [C++] 147 /// 148 enum isLvalueResult { 149 LV_Valid, 150 LV_NotObjectType, 151 LV_IncompleteVoidType, 152 LV_DuplicateVectorComponents, 153 LV_InvalidExpression, 154 LV_MemberFunction, 155 LV_SubObjCPropertySetting, 156 LV_ClassTemporary 157 }; 158 isLvalueResult isLvalue(ASTContext &Ctx) const; 159 160 /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 161 /// does not have an incomplete type, does not have a const-qualified type, 162 /// and if it is a structure or union, does not have any member (including, 163 /// recursively, any member or element of all contained aggregates or unions) 164 /// with a const-qualified type. 165 /// 166 /// \param Loc [in] [out] - A source location which *may* be filled 167 /// in with the location of the expression making this a 168 /// non-modifiable lvalue, if specified. 169 enum isModifiableLvalueResult { 170 MLV_Valid, 171 MLV_NotObjectType, 172 MLV_IncompleteVoidType, 173 MLV_DuplicateVectorComponents, 174 MLV_InvalidExpression, 175 MLV_LValueCast, // Specialized form of MLV_InvalidExpression. 176 MLV_IncompleteType, 177 MLV_ConstQualified, 178 MLV_ArrayType, 179 MLV_NotBlockQualified, 180 MLV_ReadonlyProperty, 181 MLV_NoSetterProperty, 182 MLV_MemberFunction, 183 MLV_SubObjCPropertySetting, 184 MLV_ClassTemporary 185 }; 186 isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, 187 SourceLocation *Loc = 0) const; 188 189 /// \brief The return type of classify(). Represents the C++0x expression 190 /// taxonomy. 191 class Classification { 192 public: 193 /// \brief The various classification results. Most of these mean prvalue. 194 enum Kinds { 195 CL_LValue, 196 CL_XValue, 197 CL_Function, // Functions cannot be lvalues in C. 198 CL_Void, // Void cannot be an lvalue in C. 199 CL_DuplicateVectorComponents, // A vector shuffle with dupes. 200 CL_MemberFunction, // An expression referring to a member function 201 CL_SubObjCPropertySetting, 202 CL_ClassTemporary, // A prvalue of class type 203 CL_PRValue // A prvalue for any other reason, of any other type 204 }; 205 /// \brief The results of modification testing. 206 enum ModifiableType { 207 CM_Untested, // testModifiable was false. 208 CM_Modifiable, 209 CM_RValue, // Not modifiable because it's an rvalue 210 CM_Function, // Not modifiable because it's a function; C++ only 211 CM_LValueCast, // Same as CM_RValue, but indicates GCC cast-as-lvalue ext 212 CM_NotBlockQualified, // Not captured in the closure 213 CM_NoSetterProperty,// Implicit assignment to ObjC property without setter 214 CM_ConstQualified, 215 CM_ArrayType, 216 CM_IncompleteType 217 }; 218 219 private: 220 friend class Expr; 221 222 unsigned short Kind; 223 unsigned short Modifiable; 224 225 explicit Classification(Kinds k, ModifiableType m) 226 : Kind(k), Modifiable(m) 227 {} 228 229 public: 230 Classification() {} 231 232 Kinds getKind() const { return static_cast<Kinds>(Kind); } 233 ModifiableType getModifiable() const { 234 assert(Modifiable != CM_Untested && "Did not test for modifiability."); 235 return static_cast<ModifiableType>(Modifiable); 236 } 237 bool isLValue() const { return Kind == CL_LValue; } 238 bool isXValue() const { return Kind == CL_XValue; } 239 bool isGLValue() const { return Kind <= CL_XValue; } 240 bool isPRValue() const { return Kind >= CL_Function; } 241 bool isRValue() const { return Kind >= CL_XValue; } 242 bool isModifiable() const { return getModifiable() == CM_Modifiable; } 243 }; 244 /// \brief Classify - Classify this expression according to the C++0x 245 /// expression taxonomy. 246 /// 247 /// C++0x defines ([basic.lval]) a new taxonomy of expressions to replace the 248 /// old lvalue vs rvalue. This function determines the type of expression this 249 /// is. There are three expression types: 250 /// - lvalues are classical lvalues as in C++03. 251 /// - prvalues are equivalent to rvalues in C++03. 252 /// - xvalues are expressions yielding unnamed rvalue references, e.g. a 253 /// function returning an rvalue reference. 254 /// lvalues and xvalues are collectively referred to as glvalues, while 255 /// prvalues and xvalues together form rvalues. 256 Classification Classify(ASTContext &Ctx) const { 257 return ClassifyImpl(Ctx, 0); 258 } 259 260 /// \brief ClassifyModifiable - Classify this expression according to the 261 /// C++0x expression taxonomy, and see if it is valid on the left side 262 /// of an assignment. 263 /// 264 /// This function extends classify in that it also tests whether the 265 /// expression is modifiable (C99 6.3.2.1p1). 266 /// \param Loc A source location that might be filled with a relevant location 267 /// if the expression is not modifiable. 268 Classification ClassifyModifiable(ASTContext &Ctx, SourceLocation &Loc) const{ 269 return ClassifyImpl(Ctx, &Loc); 270 } 271 272private: 273 Classification ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const; 274 275public: 276 277 /// \brief If this expression refers to a bit-field, retrieve the 278 /// declaration of that bit-field. 279 FieldDecl *getBitField(); 280 281 const FieldDecl *getBitField() const { 282 return const_cast<Expr*>(this)->getBitField(); 283 } 284 285 /// \brief Returns whether this expression refers to a vector element. 286 bool refersToVectorElement() const; 287 288 /// isKnownToHaveBooleanValue - Return true if this is an integer expression 289 /// that is known to return 0 or 1. This happens for _Bool/bool expressions 290 /// but also int expressions which are produced by things like comparisons in 291 /// C. 292 bool isKnownToHaveBooleanValue() const; 293 294 /// isIntegerConstantExpr - Return true if this expression is a valid integer 295 /// constant expression, and, if so, return its value in Result. If not a 296 /// valid i-c-e, return false and fill in Loc (if specified) with the location 297 /// of the invalid expression. 298 bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 299 SourceLocation *Loc = 0, 300 bool isEvaluated = true) const; 301 bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { 302 llvm::APSInt X; 303 return isIntegerConstantExpr(X, Ctx, Loc); 304 } 305 /// isConstantInitializer - Returns true if this expression is a constant 306 /// initializer, which can be emitted at compile-time. 307 bool isConstantInitializer(ASTContext &Ctx, bool ForRef) const; 308 309 /// EvalResult is a struct with detailed info about an evaluated expression. 310 struct EvalResult { 311 /// Val - This is the value the expression can be folded to. 312 APValue Val; 313 314 /// HasSideEffects - Whether the evaluated expression has side effects. 315 /// For example, (f() && 0) can be folded, but it still has side effects. 316 bool HasSideEffects; 317 318 /// Diag - If the expression is unfoldable, then Diag contains a note 319 /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret 320 /// position for the error, and DiagExpr is the expression that caused 321 /// the error. 322 /// If the expression is foldable, but not an integer constant expression, 323 /// Diag contains a note diagnostic that describes why it isn't an integer 324 /// constant expression. If the expression *is* an integer constant 325 /// expression, then Diag will be zero. 326 unsigned Diag; 327 const Expr *DiagExpr; 328 SourceLocation DiagLoc; 329 330 EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} 331 332 // isGlobalLValue - Return true if the evaluated lvalue expression 333 // is global. 334 bool isGlobalLValue() const; 335 // hasSideEffects - Return true if the evaluated expression has 336 // side effects. 337 bool hasSideEffects() const { 338 return HasSideEffects; 339 } 340 }; 341 342 /// Evaluate - Return true if this is a constant which we can fold using 343 /// any crazy technique (that has nothing to do with language standards) that 344 /// we want to. If this function returns true, it returns the folded constant 345 /// in Result. 346 bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; 347 348 /// EvaluateAsBooleanCondition - Return true if this is a constant 349 /// which we we can fold and convert to a boolean condition using 350 /// any crazy technique that we want to. 351 bool EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const; 352 353 /// isEvaluatable - Call Evaluate to see if this expression can be constant 354 /// folded, but discard the result. 355 bool isEvaluatable(ASTContext &Ctx) const; 356 357 /// HasSideEffects - This routine returns true for all those expressions 358 /// which must be evaluated each time and must not be optimized away 359 /// or evaluated at compile time. Example is a function call, volatile 360 /// variable read. 361 bool HasSideEffects(ASTContext &Ctx) const; 362 363 /// EvaluateAsInt - Call Evaluate and return the folded integer. This 364 /// must be called on an expression that constant folds to an integer. 365 llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; 366 367 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue 368 /// with link time known address. 369 bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; 370 371 /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue. 372 bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; 373 374 /// \brief Enumeration used to describe how \c isNullPointerConstant() 375 /// should cope with value-dependent expressions. 376 enum NullPointerConstantValueDependence { 377 /// \brief Specifies that the expression should never be value-dependent. 378 NPC_NeverValueDependent = 0, 379 380 /// \brief Specifies that a value-dependent expression of integral or 381 /// dependent type should be considered a null pointer constant. 382 NPC_ValueDependentIsNull, 383 384 /// \brief Specifies that a value-dependent expression should be considered 385 /// to never be a null pointer constant. 386 NPC_ValueDependentIsNotNull 387 }; 388 389 /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 390 /// integer constant expression with the value zero, or if this is one that is 391 /// cast to void*. 392 bool isNullPointerConstant(ASTContext &Ctx, 393 NullPointerConstantValueDependence NPC) const; 394 395 /// isOBJCGCCandidate - Return true if this expression may be used in a read/ 396 /// write barrier. 397 bool isOBJCGCCandidate(ASTContext &Ctx) const; 398 399 /// \brief Result type of CanThrow(). 400 enum CanThrowResult { 401 CT_Cannot, 402 CT_Dependent, 403 CT_Can 404 }; 405 /// \brief Test if this expression, if evaluated, might throw, according to 406 /// the rules of C++ [expr.unary.noexcept]. 407 CanThrowResult CanThrow(ASTContext &C) const; 408 409 /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return 410 /// its subexpression. If that subexpression is also a ParenExpr, 411 /// then this method recursively returns its subexpression, and so forth. 412 /// Otherwise, the method returns the current Expr. 413 Expr *IgnoreParens(); 414 415 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 416 /// or CastExprs, returning their operand. 417 Expr *IgnoreParenCasts(); 418 419 /// IgnoreParenImpCasts - Ignore parentheses and implicit casts. Strip off any 420 /// ParenExpr or ImplicitCastExprs, returning their operand. 421 Expr *IgnoreParenImpCasts(); 422 423 const Expr *IgnoreParenImpCasts() const { 424 return const_cast<Expr*>(this)->IgnoreParenImpCasts(); 425 } 426 427 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the 428 /// value (including ptr->int casts of the same size). Strip off any 429 /// ParenExpr or CastExprs, returning their operand. 430 Expr *IgnoreParenNoopCasts(ASTContext &Ctx); 431 432 /// \brief Determine whether this expression is a default function argument. 433 /// 434 /// Default arguments are implicitly generated in the abstract syntax tree 435 /// by semantic analysis for function calls, object constructions, etc. in 436 /// C++. Default arguments are represented by \c CXXDefaultArgExpr nodes; 437 /// this routine also looks through any implicit casts to determine whether 438 /// the expression is a default argument. 439 bool isDefaultArgument() const; 440 441 /// \brief Determine whether the result of this expression is a 442 /// temporary object of the given class type. 443 bool isTemporaryObject(ASTContext &Ctx, const CXXRecordDecl *TempTy) const; 444 445 const Expr *IgnoreParens() const { 446 return const_cast<Expr*>(this)->IgnoreParens(); 447 } 448 const Expr *IgnoreParenCasts() const { 449 return const_cast<Expr*>(this)->IgnoreParenCasts(); 450 } 451 const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { 452 return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); 453 } 454 455 static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); 456 static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); 457 458 static bool classof(const Stmt *T) { 459 return T->getStmtClass() >= firstExprConstant && 460 T->getStmtClass() <= lastExprConstant; 461 } 462 static bool classof(const Expr *) { return true; } 463}; 464 465 466//===----------------------------------------------------------------------===// 467// Primary Expressions. 468//===----------------------------------------------------------------------===// 469 470/// \brief Represents the qualifier that may precede a C++ name, e.g., the 471/// "std::" in "std::sort". 472struct NameQualifier { 473 /// \brief The nested name specifier. 474 NestedNameSpecifier *NNS; 475 476 /// \brief The source range covered by the nested name specifier. 477 SourceRange Range; 478}; 479 480/// \brief Represents an explicit template argument list in C++, e.g., 481/// the "<int>" in "sort<int>". 482struct ExplicitTemplateArgumentList { 483 /// \brief The source location of the left angle bracket ('<'); 484 SourceLocation LAngleLoc; 485 486 /// \brief The source location of the right angle bracket ('>'); 487 SourceLocation RAngleLoc; 488 489 /// \brief The number of template arguments in TemplateArgs. 490 /// The actual template arguments (if any) are stored after the 491 /// ExplicitTemplateArgumentList structure. 492 unsigned NumTemplateArgs; 493 494 /// \brief Retrieve the template arguments 495 TemplateArgumentLoc *getTemplateArgs() { 496 return reinterpret_cast<TemplateArgumentLoc *> (this + 1); 497 } 498 499 /// \brief Retrieve the template arguments 500 const TemplateArgumentLoc *getTemplateArgs() const { 501 return reinterpret_cast<const TemplateArgumentLoc *> (this + 1); 502 } 503 504 void initializeFrom(const TemplateArgumentListInfo &List); 505 void copyInto(TemplateArgumentListInfo &List) const; 506 static std::size_t sizeFor(unsigned NumTemplateArgs); 507 static std::size_t sizeFor(const TemplateArgumentListInfo &List); 508}; 509 510/// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, 511/// enum, etc. 512class DeclRefExpr : public Expr { 513 enum { 514 // Flag on DecoratedD that specifies when this declaration reference 515 // expression has a C++ nested-name-specifier. 516 HasQualifierFlag = 0x01, 517 // Flag on DecoratedD that specifies when this declaration reference 518 // expression has an explicit C++ template argument list. 519 HasExplicitTemplateArgumentListFlag = 0x02 520 }; 521 522 // DecoratedD - The declaration that we are referencing, plus two bits to 523 // indicate whether (1) the declaration's name was explicitly qualified and 524 // (2) the declaration's name was followed by an explicit template 525 // argument list. 526 llvm::PointerIntPair<ValueDecl *, 2> DecoratedD; 527 528 // Loc - The location of the declaration name itself. 529 SourceLocation Loc; 530 531 /// DNLoc - Provides source/type location info for the 532 /// declaration name embedded in DecoratedD. 533 DeclarationNameLoc DNLoc; 534 535 /// \brief Retrieve the qualifier that preceded the declaration name, if any. 536 NameQualifier *getNameQualifier() { 537 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 538 return 0; 539 540 return reinterpret_cast<NameQualifier *> (this + 1); 541 } 542 543 /// \brief Retrieve the qualifier that preceded the member name, if any. 544 const NameQualifier *getNameQualifier() const { 545 return const_cast<DeclRefExpr *>(this)->getNameQualifier(); 546 } 547 548 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 549 ValueDecl *D, SourceLocation NameLoc, 550 const TemplateArgumentListInfo *TemplateArgs, 551 QualType T); 552 553 DeclRefExpr(NestedNameSpecifier *Qualifier, SourceRange QualifierRange, 554 ValueDecl *D, const DeclarationNameInfo &NameInfo, 555 const TemplateArgumentListInfo *TemplateArgs, 556 QualType T); 557 558 /// \brief Construct an empty declaration reference expression. 559 explicit DeclRefExpr(EmptyShell Empty) 560 : Expr(DeclRefExprClass, Empty) { } 561 562 /// \brief Computes the type- and value-dependence flags for this 563 /// declaration reference expression. 564 void computeDependence(); 565 566public: 567 DeclRefExpr(ValueDecl *d, QualType t, SourceLocation l) : 568 Expr(DeclRefExprClass, t, false, false), DecoratedD(d, 0), Loc(l) { 569 computeDependence(); 570 } 571 572 static DeclRefExpr *Create(ASTContext &Context, 573 NestedNameSpecifier *Qualifier, 574 SourceRange QualifierRange, 575 ValueDecl *D, 576 SourceLocation NameLoc, 577 QualType T, 578 const TemplateArgumentListInfo *TemplateArgs = 0); 579 580 static DeclRefExpr *Create(ASTContext &Context, 581 NestedNameSpecifier *Qualifier, 582 SourceRange QualifierRange, 583 ValueDecl *D, 584 const DeclarationNameInfo &NameInfo, 585 QualType T, 586 const TemplateArgumentListInfo *TemplateArgs = 0); 587 588 /// \brief Construct an empty declaration reference expression. 589 static DeclRefExpr *CreateEmpty(ASTContext &Context, 590 bool HasQualifier, unsigned NumTemplateArgs); 591 592 ValueDecl *getDecl() { return DecoratedD.getPointer(); } 593 const ValueDecl *getDecl() const { return DecoratedD.getPointer(); } 594 void setDecl(ValueDecl *NewD) { DecoratedD.setPointer(NewD); } 595 596 DeclarationNameInfo getNameInfo() const { 597 return DeclarationNameInfo(getDecl()->getDeclName(), Loc, DNLoc); 598 } 599 600 SourceLocation getLocation() const { return Loc; } 601 void setLocation(SourceLocation L) { Loc = L; } 602 virtual SourceRange getSourceRange() const; 603 604 /// \brief Determine whether this declaration reference was preceded by a 605 /// C++ nested-name-specifier, e.g., \c N::foo. 606 bool hasQualifier() const { return DecoratedD.getInt() & HasQualifierFlag; } 607 608 /// \brief If the name was qualified, retrieves the source range of 609 /// the nested-name-specifier that precedes the name. Otherwise, 610 /// returns an empty source range. 611 SourceRange getQualifierRange() const { 612 if (!hasQualifier()) 613 return SourceRange(); 614 615 return getNameQualifier()->Range; 616 } 617 618 /// \brief If the name was qualified, retrieves the nested-name-specifier 619 /// that precedes the name. Otherwise, returns NULL. 620 NestedNameSpecifier *getQualifier() const { 621 if (!hasQualifier()) 622 return 0; 623 624 return getNameQualifier()->NNS; 625 } 626 627 bool hasExplicitTemplateArgs() const { 628 return (DecoratedD.getInt() & HasExplicitTemplateArgumentListFlag); 629 } 630 631 /// \brief Retrieve the explicit template argument list that followed the 632 /// member template name. 633 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 634 assert(hasExplicitTemplateArgs()); 635 636 if ((DecoratedD.getInt() & HasQualifierFlag) == 0) 637 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 638 639 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 640 getNameQualifier() + 1); 641 } 642 643 /// \brief Retrieve the explicit template argument list that followed the 644 /// member template name. 645 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 646 return const_cast<DeclRefExpr *>(this)->getExplicitTemplateArgs(); 647 } 648 649 /// \brief Retrieves the optional explicit template arguments. 650 /// This points to the same data as getExplicitTemplateArgs(), but 651 /// returns null if there are no explicit template arguments. 652 const ExplicitTemplateArgumentList *getExplicitTemplateArgsOpt() const { 653 if (!hasExplicitTemplateArgs()) return 0; 654 return &getExplicitTemplateArgs(); 655 } 656 657 /// \brief Copies the template arguments (if present) into the given 658 /// structure. 659 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 660 if (hasExplicitTemplateArgs()) 661 getExplicitTemplateArgs().copyInto(List); 662 } 663 664 /// \brief Retrieve the location of the left angle bracket following the 665 /// member name ('<'), if any. 666 SourceLocation getLAngleLoc() const { 667 if (!hasExplicitTemplateArgs()) 668 return SourceLocation(); 669 670 return getExplicitTemplateArgs().LAngleLoc; 671 } 672 673 /// \brief Retrieve the template arguments provided as part of this 674 /// template-id. 675 const TemplateArgumentLoc *getTemplateArgs() const { 676 if (!hasExplicitTemplateArgs()) 677 return 0; 678 679 return getExplicitTemplateArgs().getTemplateArgs(); 680 } 681 682 /// \brief Retrieve the number of template arguments provided as part of this 683 /// template-id. 684 unsigned getNumTemplateArgs() const { 685 if (!hasExplicitTemplateArgs()) 686 return 0; 687 688 return getExplicitTemplateArgs().NumTemplateArgs; 689 } 690 691 /// \brief Retrieve the location of the right angle bracket following the 692 /// template arguments ('>'). 693 SourceLocation getRAngleLoc() const { 694 if (!hasExplicitTemplateArgs()) 695 return SourceLocation(); 696 697 return getExplicitTemplateArgs().RAngleLoc; 698 } 699 700 static bool classof(const Stmt *T) { 701 return T->getStmtClass() == DeclRefExprClass; 702 } 703 static bool classof(const DeclRefExpr *) { return true; } 704 705 // Iterators 706 virtual child_iterator child_begin(); 707 virtual child_iterator child_end(); 708 709 friend class ASTStmtReader; 710 friend class ASTStmtWriter; 711}; 712 713/// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. 714class PredefinedExpr : public Expr { 715public: 716 enum IdentType { 717 Func, 718 Function, 719 PrettyFunction, 720 /// PrettyFunctionNoVirtual - The same as PrettyFunction, except that the 721 /// 'virtual' keyword is omitted for virtual member functions. 722 PrettyFunctionNoVirtual 723 }; 724 725private: 726 SourceLocation Loc; 727 IdentType Type; 728public: 729 PredefinedExpr(SourceLocation l, QualType type, IdentType IT) 730 : Expr(PredefinedExprClass, type, type->isDependentType(), 731 type->isDependentType()), Loc(l), Type(IT) {} 732 733 /// \brief Construct an empty predefined expression. 734 explicit PredefinedExpr(EmptyShell Empty) 735 : Expr(PredefinedExprClass, Empty) { } 736 737 IdentType getIdentType() const { return Type; } 738 void setIdentType(IdentType IT) { Type = IT; } 739 740 SourceLocation getLocation() const { return Loc; } 741 void setLocation(SourceLocation L) { Loc = L; } 742 743 static std::string ComputeName(IdentType IT, const Decl *CurrentDecl); 744 745 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 746 747 static bool classof(const Stmt *T) { 748 return T->getStmtClass() == PredefinedExprClass; 749 } 750 static bool classof(const PredefinedExpr *) { return true; } 751 752 // Iterators 753 virtual child_iterator child_begin(); 754 virtual child_iterator child_end(); 755}; 756 757/// \brief Used by IntegerLiteral/FloatingLiteral to store the numeric without 758/// leaking memory. 759/// 760/// For large floats/integers, APFloat/APInt will allocate memory from the heap 761/// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator 762/// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with 763/// the APFloat/APInt values will never get freed. APNumericStorage uses 764/// ASTContext's allocator for memory allocation. 765class APNumericStorage { 766 unsigned BitWidth; 767 union { 768 uint64_t VAL; ///< Used to store the <= 64 bits integer value. 769 uint64_t *pVal; ///< Used to store the >64 bits integer value. 770 }; 771 772 bool hasAllocation() const { return llvm::APInt::getNumWords(BitWidth) > 1; } 773 774 APNumericStorage(const APNumericStorage&); // do not implement 775 APNumericStorage& operator=(const APNumericStorage&); // do not implement 776 777protected: 778 APNumericStorage() : BitWidth(0), VAL(0) { } 779 780 llvm::APInt getIntValue() const { 781 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 782 if (NumWords > 1) 783 return llvm::APInt(BitWidth, NumWords, pVal); 784 else 785 return llvm::APInt(BitWidth, VAL); 786 } 787 void setIntValue(ASTContext &C, const llvm::APInt &Val); 788}; 789 790class APIntStorage : public APNumericStorage { 791public: 792 llvm::APInt getValue() const { return getIntValue(); } 793 void setValue(ASTContext &C, const llvm::APInt &Val) { setIntValue(C, Val); } 794}; 795 796class APFloatStorage : public APNumericStorage { 797public: 798 llvm::APFloat getValue() const { return llvm::APFloat(getIntValue()); } 799 void setValue(ASTContext &C, const llvm::APFloat &Val) { 800 setIntValue(C, Val.bitcastToAPInt()); 801 } 802}; 803 804class IntegerLiteral : public Expr { 805 APIntStorage Num; 806 SourceLocation Loc; 807 808 /// \brief Construct an empty integer literal. 809 explicit IntegerLiteral(EmptyShell Empty) 810 : Expr(IntegerLiteralClass, Empty) { } 811 812public: 813 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 814 // or UnsignedLongLongTy 815 IntegerLiteral(ASTContext &C, const llvm::APInt &V, 816 QualType type, SourceLocation l) 817 : Expr(IntegerLiteralClass, type, false, false), Loc(l) { 818 assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); 819 setValue(C, V); 820 } 821 822 // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, 823 // or UnsignedLongLongTy 824 static IntegerLiteral *Create(ASTContext &C, const llvm::APInt &V, 825 QualType type, SourceLocation l); 826 static IntegerLiteral *Create(ASTContext &C, EmptyShell Empty); 827 828 llvm::APInt getValue() const { return Num.getValue(); } 829 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 830 831 /// \brief Retrieve the location of the literal. 832 SourceLocation getLocation() const { return Loc; } 833 834 void setValue(ASTContext &C, const llvm::APInt &Val) { Num.setValue(C, Val); } 835 void setLocation(SourceLocation Location) { Loc = Location; } 836 837 static bool classof(const Stmt *T) { 838 return T->getStmtClass() == IntegerLiteralClass; 839 } 840 static bool classof(const IntegerLiteral *) { return true; } 841 842 // Iterators 843 virtual child_iterator child_begin(); 844 virtual child_iterator child_end(); 845}; 846 847class CharacterLiteral : public Expr { 848 unsigned Value; 849 SourceLocation Loc; 850 bool IsWide; 851public: 852 // type should be IntTy 853 CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) 854 : Expr(CharacterLiteralClass, type, false, false), Value(value), Loc(l), 855 IsWide(iswide) { 856 } 857 858 /// \brief Construct an empty character literal. 859 CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } 860 861 SourceLocation getLocation() const { return Loc; } 862 bool isWide() const { return IsWide; } 863 864 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 865 866 unsigned getValue() const { return Value; } 867 868 void setLocation(SourceLocation Location) { Loc = Location; } 869 void setWide(bool W) { IsWide = W; } 870 void setValue(unsigned Val) { Value = Val; } 871 872 static bool classof(const Stmt *T) { 873 return T->getStmtClass() == CharacterLiteralClass; 874 } 875 static bool classof(const CharacterLiteral *) { return true; } 876 877 // Iterators 878 virtual child_iterator child_begin(); 879 virtual child_iterator child_end(); 880}; 881 882class FloatingLiteral : public Expr { 883 APFloatStorage Num; 884 bool IsExact : 1; 885 SourceLocation Loc; 886 887 FloatingLiteral(ASTContext &C, const llvm::APFloat &V, bool isexact, 888 QualType Type, SourceLocation L) 889 : Expr(FloatingLiteralClass, Type, false, false), 890 IsExact(isexact), Loc(L) { 891 setValue(C, V); 892 } 893 894 /// \brief Construct an empty floating-point literal. 895 explicit FloatingLiteral(EmptyShell Empty) 896 : Expr(FloatingLiteralClass, Empty), IsExact(false) { } 897 898public: 899 static FloatingLiteral *Create(ASTContext &C, const llvm::APFloat &V, 900 bool isexact, QualType Type, SourceLocation L); 901 static FloatingLiteral *Create(ASTContext &C, EmptyShell Empty); 902 903 llvm::APFloat getValue() const { return Num.getValue(); } 904 void setValue(ASTContext &C, const llvm::APFloat &Val) { 905 Num.setValue(C, Val); 906 } 907 908 bool isExact() const { return IsExact; } 909 void setExact(bool E) { IsExact = E; } 910 911 /// getValueAsApproximateDouble - This returns the value as an inaccurate 912 /// double. Note that this may cause loss of precision, but is useful for 913 /// debugging dumps, etc. 914 double getValueAsApproximateDouble() const; 915 916 SourceLocation getLocation() const { return Loc; } 917 void setLocation(SourceLocation L) { Loc = L; } 918 919 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 920 921 static bool classof(const Stmt *T) { 922 return T->getStmtClass() == FloatingLiteralClass; 923 } 924 static bool classof(const FloatingLiteral *) { return true; } 925 926 // Iterators 927 virtual child_iterator child_begin(); 928 virtual child_iterator child_end(); 929}; 930 931/// ImaginaryLiteral - We support imaginary integer and floating point literals, 932/// like "1.0i". We represent these as a wrapper around FloatingLiteral and 933/// IntegerLiteral classes. Instances of this class always have a Complex type 934/// whose element type matches the subexpression. 935/// 936class ImaginaryLiteral : public Expr { 937 Stmt *Val; 938public: 939 ImaginaryLiteral(Expr *val, QualType Ty) 940 : Expr(ImaginaryLiteralClass, Ty, false, false), Val(val) {} 941 942 /// \brief Build an empty imaginary literal. 943 explicit ImaginaryLiteral(EmptyShell Empty) 944 : Expr(ImaginaryLiteralClass, Empty) { } 945 946 const Expr *getSubExpr() const { return cast<Expr>(Val); } 947 Expr *getSubExpr() { return cast<Expr>(Val); } 948 void setSubExpr(Expr *E) { Val = E; } 949 950 virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } 951 static bool classof(const Stmt *T) { 952 return T->getStmtClass() == ImaginaryLiteralClass; 953 } 954 static bool classof(const ImaginaryLiteral *) { return true; } 955 956 // Iterators 957 virtual child_iterator child_begin(); 958 virtual child_iterator child_end(); 959}; 960 961/// StringLiteral - This represents a string literal expression, e.g. "foo" 962/// or L"bar" (wide strings). The actual string is returned by getStrData() 963/// is NOT null-terminated, and the length of the string is determined by 964/// calling getByteLength(). The C type for a string is always a 965/// ConstantArrayType. In C++, the char type is const qualified, in C it is 966/// not. 967/// 968/// Note that strings in C can be formed by concatenation of multiple string 969/// literal pptokens in translation phase #6. This keeps track of the locations 970/// of each of these pieces. 971/// 972/// Strings in C can also be truncated and extended by assigning into arrays, 973/// e.g. with constructs like: 974/// char X[2] = "foobar"; 975/// In this case, getByteLength() will return 6, but the string literal will 976/// have type "char[2]". 977class StringLiteral : public Expr { 978 const char *StrData; 979 unsigned ByteLength; 980 bool IsWide; 981 unsigned NumConcatenated; 982 SourceLocation TokLocs[1]; 983 984 StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty, false, false) {} 985 986public: 987 /// This is the "fully general" constructor that allows representation of 988 /// strings formed from multiple concatenated tokens. 989 static StringLiteral *Create(ASTContext &C, const char *StrData, 990 unsigned ByteLength, bool Wide, QualType Ty, 991 const SourceLocation *Loc, unsigned NumStrs); 992 993 /// Simple constructor for string literals made from one token. 994 static StringLiteral *Create(ASTContext &C, const char *StrData, 995 unsigned ByteLength, 996 bool Wide, QualType Ty, SourceLocation Loc) { 997 return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); 998 } 999 1000 /// \brief Construct an empty string literal. 1001 static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); 1002 1003 llvm::StringRef getString() const { 1004 return llvm::StringRef(StrData, ByteLength); 1005 } 1006 1007 unsigned getByteLength() const { return ByteLength; } 1008 1009 /// \brief Sets the string data to the given string data. 1010 void setString(ASTContext &C, llvm::StringRef Str); 1011 1012 bool isWide() const { return IsWide; } 1013 void setWide(bool W) { IsWide = W; } 1014 1015 bool containsNonAsciiOrNull() const { 1016 llvm::StringRef Str = getString(); 1017 for (unsigned i = 0, e = Str.size(); i != e; ++i) 1018 if (!isascii(Str[i]) || !Str[i]) 1019 return true; 1020 return false; 1021 } 1022 /// getNumConcatenated - Get the number of string literal tokens that were 1023 /// concatenated in translation phase #6 to form this string literal. 1024 unsigned getNumConcatenated() const { return NumConcatenated; } 1025 1026 SourceLocation getStrTokenLoc(unsigned TokNum) const { 1027 assert(TokNum < NumConcatenated && "Invalid tok number"); 1028 return TokLocs[TokNum]; 1029 } 1030 void setStrTokenLoc(unsigned TokNum, SourceLocation L) { 1031 assert(TokNum < NumConcatenated && "Invalid tok number"); 1032 TokLocs[TokNum] = L; 1033 } 1034 1035 typedef const SourceLocation *tokloc_iterator; 1036 tokloc_iterator tokloc_begin() const { return TokLocs; } 1037 tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } 1038 1039 virtual SourceRange getSourceRange() const { 1040 return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); 1041 } 1042 static bool classof(const Stmt *T) { 1043 return T->getStmtClass() == StringLiteralClass; 1044 } 1045 static bool classof(const StringLiteral *) { return true; } 1046 1047 // Iterators 1048 virtual child_iterator child_begin(); 1049 virtual child_iterator child_end(); 1050}; 1051 1052/// ParenExpr - This represents a parethesized expression, e.g. "(1)". This 1053/// AST node is only formed if full location information is requested. 1054class ParenExpr : public Expr { 1055 SourceLocation L, R; 1056 Stmt *Val; 1057public: 1058 ParenExpr(SourceLocation l, SourceLocation r, Expr *val) 1059 : Expr(ParenExprClass, val->getType(), 1060 val->isTypeDependent(), val->isValueDependent()), 1061 L(l), R(r), Val(val) {} 1062 1063 /// \brief Construct an empty parenthesized expression. 1064 explicit ParenExpr(EmptyShell Empty) 1065 : Expr(ParenExprClass, Empty) { } 1066 1067 const Expr *getSubExpr() const { return cast<Expr>(Val); } 1068 Expr *getSubExpr() { return cast<Expr>(Val); } 1069 void setSubExpr(Expr *E) { Val = E; } 1070 1071 virtual SourceRange getSourceRange() const { return SourceRange(L, R); } 1072 1073 /// \brief Get the location of the left parentheses '('. 1074 SourceLocation getLParen() const { return L; } 1075 void setLParen(SourceLocation Loc) { L = Loc; } 1076 1077 /// \brief Get the location of the right parentheses ')'. 1078 SourceLocation getRParen() const { return R; } 1079 void setRParen(SourceLocation Loc) { R = Loc; } 1080 1081 static bool classof(const Stmt *T) { 1082 return T->getStmtClass() == ParenExprClass; 1083 } 1084 static bool classof(const ParenExpr *) { return true; } 1085 1086 // Iterators 1087 virtual child_iterator child_begin(); 1088 virtual child_iterator child_end(); 1089}; 1090 1091 1092/// UnaryOperator - This represents the unary-expression's (except sizeof and 1093/// alignof), the postinc/postdec operators from postfix-expression, and various 1094/// extensions. 1095/// 1096/// Notes on various nodes: 1097/// 1098/// Real/Imag - These return the real/imag part of a complex operand. If 1099/// applied to a non-complex value, the former returns its operand and the 1100/// later returns zero in the type of the operand. 1101/// 1102class UnaryOperator : public Expr { 1103public: 1104 typedef UnaryOperatorKind Opcode; 1105 1106private: 1107 unsigned Opc : 5; 1108 SourceLocation Loc; 1109 Stmt *Val; 1110public: 1111 1112 UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) 1113 : Expr(UnaryOperatorClass, type, 1114 input->isTypeDependent() || type->isDependentType(), 1115 input->isValueDependent()), 1116 Opc(opc), Loc(l), Val(input) {} 1117 1118 /// \brief Build an empty unary operator. 1119 explicit UnaryOperator(EmptyShell Empty) 1120 : Expr(UnaryOperatorClass, Empty), Opc(UO_AddrOf) { } 1121 1122 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 1123 void setOpcode(Opcode O) { Opc = O; } 1124 1125 Expr *getSubExpr() const { return cast<Expr>(Val); } 1126 void setSubExpr(Expr *E) { Val = E; } 1127 1128 /// getOperatorLoc - Return the location of the operator. 1129 SourceLocation getOperatorLoc() const { return Loc; } 1130 void setOperatorLoc(SourceLocation L) { Loc = L; } 1131 1132 /// isPostfix - Return true if this is a postfix operation, like x++. 1133 static bool isPostfix(Opcode Op) { 1134 return Op == UO_PostInc || Op == UO_PostDec; 1135 } 1136 1137 /// isPostfix - Return true if this is a prefix operation, like --x. 1138 static bool isPrefix(Opcode Op) { 1139 return Op == UO_PreInc || Op == UO_PreDec; 1140 } 1141 1142 bool isPrefix() const { return isPrefix(getOpcode()); } 1143 bool isPostfix() const { return isPostfix(getOpcode()); } 1144 bool isIncrementOp() const { 1145 return Opc == UO_PreInc || Opc == UO_PostInc; 1146 } 1147 bool isIncrementDecrementOp() const { 1148 return Opc <= UO_PreDec; 1149 } 1150 static bool isArithmeticOp(Opcode Op) { 1151 return Op >= UO_Plus && Op <= UO_LNot; 1152 } 1153 bool isArithmeticOp() const { return isArithmeticOp(getOpcode()); } 1154 1155 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1156 /// corresponds to, e.g. "sizeof" or "[pre]++" 1157 static const char *getOpcodeStr(Opcode Op); 1158 1159 /// \brief Retrieve the unary opcode that corresponds to the given 1160 /// overloaded operator. 1161 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); 1162 1163 /// \brief Retrieve the overloaded operator kind that corresponds to 1164 /// the given unary opcode. 1165 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 1166 1167 virtual SourceRange getSourceRange() const { 1168 if (isPostfix()) 1169 return SourceRange(Val->getLocStart(), Loc); 1170 else 1171 return SourceRange(Loc, Val->getLocEnd()); 1172 } 1173 virtual SourceLocation getExprLoc() const { return Loc; } 1174 1175 static bool classof(const Stmt *T) { 1176 return T->getStmtClass() == UnaryOperatorClass; 1177 } 1178 static bool classof(const UnaryOperator *) { return true; } 1179 1180 // Iterators 1181 virtual child_iterator child_begin(); 1182 virtual child_iterator child_end(); 1183}; 1184 1185/// OffsetOfExpr - [C99 7.17] - This represents an expression of the form 1186/// offsetof(record-type, member-designator). For example, given: 1187/// @code 1188/// struct S { 1189/// float f; 1190/// double d; 1191/// }; 1192/// struct T { 1193/// int i; 1194/// struct S s[10]; 1195/// }; 1196/// @endcode 1197/// we can represent and evaluate the expression @c offsetof(struct T, s[2].d). 1198 1199class OffsetOfExpr : public Expr { 1200public: 1201 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 1202 class OffsetOfNode { 1203 public: 1204 /// \brief The kind of offsetof node we have. 1205 enum Kind { 1206 /// \brief An index into an array. 1207 Array = 0x00, 1208 /// \brief A field. 1209 Field = 0x01, 1210 /// \brief A field in a dependent type, known only by its name. 1211 Identifier = 0x02, 1212 /// \brief An implicit indirection through a C++ base class, when the 1213 /// field found is in a base class. 1214 Base = 0x03 1215 }; 1216 1217 private: 1218 enum { MaskBits = 2, Mask = 0x03 }; 1219 1220 /// \brief The source range that covers this part of the designator. 1221 SourceRange Range; 1222 1223 /// \brief The data describing the designator, which comes in three 1224 /// different forms, depending on the lower two bits. 1225 /// - An unsigned index into the array of Expr*'s stored after this node 1226 /// in memory, for [constant-expression] designators. 1227 /// - A FieldDecl*, for references to a known field. 1228 /// - An IdentifierInfo*, for references to a field with a given name 1229 /// when the class type is dependent. 1230 /// - A CXXBaseSpecifier*, for references that look at a field in a 1231 /// base class. 1232 uintptr_t Data; 1233 1234 public: 1235 /// \brief Create an offsetof node that refers to an array element. 1236 OffsetOfNode(SourceLocation LBracketLoc, unsigned Index, 1237 SourceLocation RBracketLoc) 1238 : Range(LBracketLoc, RBracketLoc), Data((Index << 2) | Array) { } 1239 1240 /// \brief Create an offsetof node that refers to a field. 1241 OffsetOfNode(SourceLocation DotLoc, FieldDecl *Field, 1242 SourceLocation NameLoc) 1243 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1244 Data(reinterpret_cast<uintptr_t>(Field) | OffsetOfNode::Field) { } 1245 1246 /// \brief Create an offsetof node that refers to an identifier. 1247 OffsetOfNode(SourceLocation DotLoc, IdentifierInfo *Name, 1248 SourceLocation NameLoc) 1249 : Range(DotLoc.isValid()? DotLoc : NameLoc, NameLoc), 1250 Data(reinterpret_cast<uintptr_t>(Name) | Identifier) { } 1251 1252 /// \brief Create an offsetof node that refers into a C++ base class. 1253 explicit OffsetOfNode(const CXXBaseSpecifier *Base) 1254 : Range(), Data(reinterpret_cast<uintptr_t>(Base) | OffsetOfNode::Base) {} 1255 1256 /// \brief Determine what kind of offsetof node this is. 1257 Kind getKind() const { 1258 return static_cast<Kind>(Data & Mask); 1259 } 1260 1261 /// \brief For an array element node, returns the index into the array 1262 /// of expressions. 1263 unsigned getArrayExprIndex() const { 1264 assert(getKind() == Array); 1265 return Data >> 2; 1266 } 1267 1268 /// \brief For a field offsetof node, returns the field. 1269 FieldDecl *getField() const { 1270 assert(getKind() == Field); 1271 return reinterpret_cast<FieldDecl *>(Data & ~(uintptr_t)Mask); 1272 } 1273 1274 /// \brief For a field or identifier offsetof node, returns the name of 1275 /// the field. 1276 IdentifierInfo *getFieldName() const; 1277 1278 /// \brief For a base class node, returns the base specifier. 1279 CXXBaseSpecifier *getBase() const { 1280 assert(getKind() == Base); 1281 return reinterpret_cast<CXXBaseSpecifier *>(Data & ~(uintptr_t)Mask); 1282 } 1283 1284 /// \brief Retrieve the source range that covers this offsetof node. 1285 /// 1286 /// For an array element node, the source range contains the locations of 1287 /// the square brackets. For a field or identifier node, the source range 1288 /// contains the location of the period (if there is one) and the 1289 /// identifier. 1290 SourceRange getRange() const { return Range; } 1291 }; 1292 1293private: 1294 1295 SourceLocation OperatorLoc, RParenLoc; 1296 // Base type; 1297 TypeSourceInfo *TSInfo; 1298 // Number of sub-components (i.e. instances of OffsetOfNode). 1299 unsigned NumComps; 1300 // Number of sub-expressions (i.e. array subscript expressions). 1301 unsigned NumExprs; 1302 1303 OffsetOfExpr(ASTContext &C, QualType type, 1304 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1305 OffsetOfNode* compsPtr, unsigned numComps, 1306 Expr** exprsPtr, unsigned numExprs, 1307 SourceLocation RParenLoc); 1308 1309 explicit OffsetOfExpr(unsigned numComps, unsigned numExprs) 1310 : Expr(OffsetOfExprClass, EmptyShell()), 1311 TSInfo(0), NumComps(numComps), NumExprs(numExprs) {} 1312 1313public: 1314 1315 static OffsetOfExpr *Create(ASTContext &C, QualType type, 1316 SourceLocation OperatorLoc, TypeSourceInfo *tsi, 1317 OffsetOfNode* compsPtr, unsigned numComps, 1318 Expr** exprsPtr, unsigned numExprs, 1319 SourceLocation RParenLoc); 1320 1321 static OffsetOfExpr *CreateEmpty(ASTContext &C, 1322 unsigned NumComps, unsigned NumExprs); 1323 1324 /// getOperatorLoc - Return the location of the operator. 1325 SourceLocation getOperatorLoc() const { return OperatorLoc; } 1326 void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } 1327 1328 /// \brief Return the location of the right parentheses. 1329 SourceLocation getRParenLoc() const { return RParenLoc; } 1330 void setRParenLoc(SourceLocation R) { RParenLoc = R; } 1331 1332 TypeSourceInfo *getTypeSourceInfo() const { 1333 return TSInfo; 1334 } 1335 void setTypeSourceInfo(TypeSourceInfo *tsi) { 1336 TSInfo = tsi; 1337 } 1338 1339 const OffsetOfNode &getComponent(unsigned Idx) { 1340 assert(Idx < NumComps && "Subscript out of range"); 1341 return reinterpret_cast<OffsetOfNode *> (this + 1)[Idx]; 1342 } 1343 1344 void setComponent(unsigned Idx, OffsetOfNode ON) { 1345 assert(Idx < NumComps && "Subscript out of range"); 1346 reinterpret_cast<OffsetOfNode *> (this + 1)[Idx] = ON; 1347 } 1348 1349 unsigned getNumComponents() const { 1350 return NumComps; 1351 } 1352 1353 Expr* getIndexExpr(unsigned Idx) { 1354 assert(Idx < NumExprs && "Subscript out of range"); 1355 return reinterpret_cast<Expr **>( 1356 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx]; 1357 } 1358 1359 void setIndexExpr(unsigned Idx, Expr* E) { 1360 assert(Idx < NumComps && "Subscript out of range"); 1361 reinterpret_cast<Expr **>( 1362 reinterpret_cast<OffsetOfNode *>(this+1) + NumComps)[Idx] = E; 1363 } 1364 1365 unsigned getNumExpressions() const { 1366 return NumExprs; 1367 } 1368 1369 virtual SourceRange getSourceRange() const { 1370 return SourceRange(OperatorLoc, RParenLoc); 1371 } 1372 1373 static bool classof(const Stmt *T) { 1374 return T->getStmtClass() == OffsetOfExprClass; 1375 } 1376 1377 static bool classof(const OffsetOfExpr *) { return true; } 1378 1379 // Iterators 1380 virtual child_iterator child_begin(); 1381 virtual child_iterator child_end(); 1382}; 1383 1384/// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of 1385/// types and expressions. 1386class SizeOfAlignOfExpr : public Expr { 1387 bool isSizeof : 1; // true if sizeof, false if alignof. 1388 bool isType : 1; // true if operand is a type, false if an expression 1389 union { 1390 TypeSourceInfo *Ty; 1391 Stmt *Ex; 1392 } Argument; 1393 SourceLocation OpLoc, RParenLoc; 1394 1395public: 1396 SizeOfAlignOfExpr(bool issizeof, TypeSourceInfo *TInfo, 1397 QualType resultType, SourceLocation op, 1398 SourceLocation rp) : 1399 Expr(SizeOfAlignOfExprClass, resultType, 1400 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1401 // Value-dependent if the argument is type-dependent. 1402 TInfo->getType()->isDependentType()), 1403 isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { 1404 Argument.Ty = TInfo; 1405 } 1406 1407 SizeOfAlignOfExpr(bool issizeof, Expr *E, 1408 QualType resultType, SourceLocation op, 1409 SourceLocation rp) : 1410 Expr(SizeOfAlignOfExprClass, resultType, 1411 false, // Never type-dependent (C++ [temp.dep.expr]p3). 1412 // Value-dependent if the argument is type-dependent. 1413 E->isTypeDependent()), 1414 isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { 1415 Argument.Ex = E; 1416 } 1417 1418 /// \brief Construct an empty sizeof/alignof expression. 1419 explicit SizeOfAlignOfExpr(EmptyShell Empty) 1420 : Expr(SizeOfAlignOfExprClass, Empty) { } 1421 1422 bool isSizeOf() const { return isSizeof; } 1423 void setSizeof(bool S) { isSizeof = S; } 1424 1425 bool isArgumentType() const { return isType; } 1426 QualType getArgumentType() const { 1427 return getArgumentTypeInfo()->getType(); 1428 } 1429 TypeSourceInfo *getArgumentTypeInfo() const { 1430 assert(isArgumentType() && "calling getArgumentType() when arg is expr"); 1431 return Argument.Ty; 1432 } 1433 Expr *getArgumentExpr() { 1434 assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); 1435 return static_cast<Expr*>(Argument.Ex); 1436 } 1437 const Expr *getArgumentExpr() const { 1438 return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); 1439 } 1440 1441 void setArgument(Expr *E) { Argument.Ex = E; isType = false; } 1442 void setArgument(TypeSourceInfo *TInfo) { 1443 Argument.Ty = TInfo; 1444 isType = true; 1445 } 1446 1447 /// Gets the argument type, or the type of the argument expression, whichever 1448 /// is appropriate. 1449 QualType getTypeOfArgument() const { 1450 return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); 1451 } 1452 1453 SourceLocation getOperatorLoc() const { return OpLoc; } 1454 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 1455 1456 SourceLocation getRParenLoc() const { return RParenLoc; } 1457 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1458 1459 virtual SourceRange getSourceRange() const { 1460 return SourceRange(OpLoc, RParenLoc); 1461 } 1462 1463 static bool classof(const Stmt *T) { 1464 return T->getStmtClass() == SizeOfAlignOfExprClass; 1465 } 1466 static bool classof(const SizeOfAlignOfExpr *) { return true; } 1467 1468 // Iterators 1469 virtual child_iterator child_begin(); 1470 virtual child_iterator child_end(); 1471}; 1472 1473//===----------------------------------------------------------------------===// 1474// Postfix Operators. 1475//===----------------------------------------------------------------------===// 1476 1477/// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. 1478class ArraySubscriptExpr : public Expr { 1479 enum { LHS, RHS, END_EXPR=2 }; 1480 Stmt* SubExprs[END_EXPR]; 1481 SourceLocation RBracketLoc; 1482public: 1483 ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, 1484 SourceLocation rbracketloc) 1485 : Expr(ArraySubscriptExprClass, t, 1486 lhs->isTypeDependent() || rhs->isTypeDependent(), 1487 lhs->isValueDependent() || rhs->isValueDependent()), 1488 RBracketLoc(rbracketloc) { 1489 SubExprs[LHS] = lhs; 1490 SubExprs[RHS] = rhs; 1491 } 1492 1493 /// \brief Create an empty array subscript expression. 1494 explicit ArraySubscriptExpr(EmptyShell Shell) 1495 : Expr(ArraySubscriptExprClass, Shell) { } 1496 1497 /// An array access can be written A[4] or 4[A] (both are equivalent). 1498 /// - getBase() and getIdx() always present the normalized view: A[4]. 1499 /// In this case getBase() returns "A" and getIdx() returns "4". 1500 /// - getLHS() and getRHS() present the syntactic view. e.g. for 1501 /// 4[A] getLHS() returns "4". 1502 /// Note: Because vector element access is also written A[4] we must 1503 /// predicate the format conversion in getBase and getIdx only on the 1504 /// the type of the RHS, as it is possible for the LHS to be a vector of 1505 /// integer type 1506 Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } 1507 const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 1508 void setLHS(Expr *E) { SubExprs[LHS] = E; } 1509 1510 Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } 1511 const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 1512 void setRHS(Expr *E) { SubExprs[RHS] = E; } 1513 1514 Expr *getBase() { 1515 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1516 } 1517 1518 const Expr *getBase() const { 1519 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); 1520 } 1521 1522 Expr *getIdx() { 1523 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1524 } 1525 1526 const Expr *getIdx() const { 1527 return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); 1528 } 1529 1530 virtual SourceRange getSourceRange() const { 1531 return SourceRange(getLHS()->getLocStart(), RBracketLoc); 1532 } 1533 1534 SourceLocation getRBracketLoc() const { return RBracketLoc; } 1535 void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } 1536 1537 virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } 1538 1539 static bool classof(const Stmt *T) { 1540 return T->getStmtClass() == ArraySubscriptExprClass; 1541 } 1542 static bool classof(const ArraySubscriptExpr *) { return true; } 1543 1544 // Iterators 1545 virtual child_iterator child_begin(); 1546 virtual child_iterator child_end(); 1547}; 1548 1549 1550/// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). 1551/// CallExpr itself represents a normal function call, e.g., "f(x, 2)", 1552/// while its subclasses may represent alternative syntax that (semantically) 1553/// results in a function call. For example, CXXOperatorCallExpr is 1554/// a subclass for overloaded operator calls that use operator syntax, e.g., 1555/// "str1 + str2" to resolve to a function call. 1556class CallExpr : public Expr { 1557 enum { FN=0, ARGS_START=1 }; 1558 Stmt **SubExprs; 1559 unsigned NumArgs; 1560 SourceLocation RParenLoc; 1561 1562protected: 1563 // This version of the constructor is for derived classes. 1564 CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 1565 QualType t, SourceLocation rparenloc); 1566 1567public: 1568 CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, 1569 SourceLocation rparenloc); 1570 1571 /// \brief Build an empty call expression. 1572 CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); 1573 1574 const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } 1575 Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } 1576 void setCallee(Expr *F) { SubExprs[FN] = F; } 1577 1578 Decl *getCalleeDecl(); 1579 const Decl *getCalleeDecl() const { 1580 return const_cast<CallExpr*>(this)->getCalleeDecl(); 1581 } 1582 1583 /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. 1584 FunctionDecl *getDirectCallee(); 1585 const FunctionDecl *getDirectCallee() const { 1586 return const_cast<CallExpr*>(this)->getDirectCallee(); 1587 } 1588 1589 /// getNumArgs - Return the number of actual arguments to this call. 1590 /// 1591 unsigned getNumArgs() const { return NumArgs; } 1592 1593 /// getArg - Return the specified argument. 1594 Expr *getArg(unsigned Arg) { 1595 assert(Arg < NumArgs && "Arg access out of range!"); 1596 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1597 } 1598 const Expr *getArg(unsigned Arg) const { 1599 assert(Arg < NumArgs && "Arg access out of range!"); 1600 return cast<Expr>(SubExprs[Arg+ARGS_START]); 1601 } 1602 1603 /// setArg - Set the specified argument. 1604 void setArg(unsigned Arg, Expr *ArgExpr) { 1605 assert(Arg < NumArgs && "Arg access out of range!"); 1606 SubExprs[Arg+ARGS_START] = ArgExpr; 1607 } 1608 1609 /// setNumArgs - This changes the number of arguments present in this call. 1610 /// Any orphaned expressions are deleted by this, and any new operands are set 1611 /// to null. 1612 void setNumArgs(ASTContext& C, unsigned NumArgs); 1613 1614 typedef ExprIterator arg_iterator; 1615 typedef ConstExprIterator const_arg_iterator; 1616 1617 arg_iterator arg_begin() { return SubExprs+ARGS_START; } 1618 arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } 1619 const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } 1620 const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} 1621 1622 /// getNumCommas - Return the number of commas that must have been present in 1623 /// this function call. 1624 unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } 1625 1626 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 1627 /// not, return 0. 1628 unsigned isBuiltinCall(ASTContext &Context) const; 1629 1630 /// getCallReturnType - Get the return type of the call expr. This is not 1631 /// always the type of the expr itself, if the return type is a reference 1632 /// type. 1633 QualType getCallReturnType() const; 1634 1635 SourceLocation getRParenLoc() const { return RParenLoc; } 1636 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1637 1638 virtual SourceRange getSourceRange() const { 1639 return SourceRange(getCallee()->getLocStart(), RParenLoc); 1640 } 1641 1642 static bool classof(const Stmt *T) { 1643 return T->getStmtClass() >= firstCallExprConstant && 1644 T->getStmtClass() <= lastCallExprConstant; 1645 } 1646 static bool classof(const CallExpr *) { return true; } 1647 1648 // Iterators 1649 virtual child_iterator child_begin(); 1650 virtual child_iterator child_end(); 1651}; 1652 1653/// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. 1654/// 1655class MemberExpr : public Expr { 1656 /// Extra data stored in some member expressions. 1657 struct MemberNameQualifier : public NameQualifier { 1658 DeclAccessPair FoundDecl; 1659 }; 1660 1661 /// Base - the expression for the base pointer or structure references. In 1662 /// X.F, this is "X". 1663 Stmt *Base; 1664 1665 /// MemberDecl - This is the decl being referenced by the field/member name. 1666 /// In X.F, this is the decl referenced by F. 1667 ValueDecl *MemberDecl; 1668 1669 /// MemberLoc - This is the location of the member name. 1670 SourceLocation MemberLoc; 1671 1672 /// MemberDNLoc - Provides source/type location info for the 1673 /// declaration name embedded in MemberDecl. 1674 DeclarationNameLoc MemberDNLoc; 1675 1676 /// IsArrow - True if this is "X->F", false if this is "X.F". 1677 bool IsArrow : 1; 1678 1679 /// \brief True if this member expression used a nested-name-specifier to 1680 /// refer to the member, e.g., "x->Base::f", or found its member via a using 1681 /// declaration. When true, a MemberNameQualifier 1682 /// structure is allocated immediately after the MemberExpr. 1683 bool HasQualifierOrFoundDecl : 1; 1684 1685 /// \brief True if this member expression specified a template argument list 1686 /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList 1687 /// structure (and its TemplateArguments) are allocated immediately after 1688 /// the MemberExpr or, if the member expression also has a qualifier, after 1689 /// the MemberNameQualifier structure. 1690 bool HasExplicitTemplateArgumentList : 1; 1691 1692 /// \brief Retrieve the qualifier that preceded the member name, if any. 1693 MemberNameQualifier *getMemberQualifier() { 1694 assert(HasQualifierOrFoundDecl); 1695 return reinterpret_cast<MemberNameQualifier *> (this + 1); 1696 } 1697 1698 /// \brief Retrieve the qualifier that preceded the member name, if any. 1699 const MemberNameQualifier *getMemberQualifier() const { 1700 return const_cast<MemberExpr *>(this)->getMemberQualifier(); 1701 } 1702 1703public: 1704 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1705 const DeclarationNameInfo &NameInfo, QualType ty) 1706 : Expr(MemberExprClass, ty, 1707 base->isTypeDependent(), base->isValueDependent()), 1708 Base(base), MemberDecl(memberdecl), MemberLoc(NameInfo.getLoc()), 1709 MemberDNLoc(NameInfo.getInfo()), IsArrow(isarrow), 1710 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) { 1711 assert(memberdecl->getDeclName() == NameInfo.getName()); 1712 } 1713 1714 // NOTE: this constructor should be used only when it is known that 1715 // the member name can not provide additional syntactic info 1716 // (i.e., source locations for C++ operator names or type source info 1717 // for constructors, destructors and conversion oeprators). 1718 MemberExpr(Expr *base, bool isarrow, ValueDecl *memberdecl, 1719 SourceLocation l, QualType ty) 1720 : Expr(MemberExprClass, ty, 1721 base->isTypeDependent(), base->isValueDependent()), 1722 Base(base), MemberDecl(memberdecl), MemberLoc(l), MemberDNLoc(), 1723 IsArrow(isarrow), 1724 HasQualifierOrFoundDecl(false), HasExplicitTemplateArgumentList(false) {} 1725 1726 static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, 1727 NestedNameSpecifier *qual, SourceRange qualrange, 1728 ValueDecl *memberdecl, DeclAccessPair founddecl, 1729 DeclarationNameInfo MemberNameInfo, 1730 const TemplateArgumentListInfo *targs, 1731 QualType ty); 1732 1733 void setBase(Expr *E) { Base = E; } 1734 Expr *getBase() const { return cast<Expr>(Base); } 1735 1736 /// \brief Retrieve the member declaration to which this expression refers. 1737 /// 1738 /// The returned declaration will either be a FieldDecl or (in C++) 1739 /// a CXXMethodDecl. 1740 ValueDecl *getMemberDecl() const { return MemberDecl; } 1741 void setMemberDecl(ValueDecl *D) { MemberDecl = D; } 1742 1743 /// \brief Retrieves the declaration found by lookup. 1744 DeclAccessPair getFoundDecl() const { 1745 if (!HasQualifierOrFoundDecl) 1746 return DeclAccessPair::make(getMemberDecl(), 1747 getMemberDecl()->getAccess()); 1748 return getMemberQualifier()->FoundDecl; 1749 } 1750 1751 /// \brief Determines whether this member expression actually had 1752 /// a C++ nested-name-specifier prior to the name of the member, e.g., 1753 /// x->Base::foo. 1754 bool hasQualifier() const { return getQualifier() != 0; } 1755 1756 /// \brief If the member name was qualified, retrieves the source range of 1757 /// the nested-name-specifier that precedes the member name. Otherwise, 1758 /// returns an empty source range. 1759 SourceRange getQualifierRange() const { 1760 if (!HasQualifierOrFoundDecl) 1761 return SourceRange(); 1762 1763 return getMemberQualifier()->Range; 1764 } 1765 1766 /// \brief If the member name was qualified, retrieves the 1767 /// nested-name-specifier that precedes the member name. Otherwise, returns 1768 /// NULL. 1769 NestedNameSpecifier *getQualifier() const { 1770 if (!HasQualifierOrFoundDecl) 1771 return 0; 1772 1773 return getMemberQualifier()->NNS; 1774 } 1775 1776 /// \brief Determines whether this member expression actually had a C++ 1777 /// template argument list explicitly specified, e.g., x.f<int>. 1778 bool hasExplicitTemplateArgs() const { 1779 return HasExplicitTemplateArgumentList; 1780 } 1781 1782 /// \brief Copies the template arguments (if present) into the given 1783 /// structure. 1784 void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { 1785 if (hasExplicitTemplateArgs()) 1786 getExplicitTemplateArgs().copyInto(List); 1787 } 1788 1789 /// \brief Retrieve the explicit template argument list that 1790 /// follow the member template name. This must only be called on an 1791 /// expression with explicit template arguments. 1792 ExplicitTemplateArgumentList &getExplicitTemplateArgs() { 1793 assert(HasExplicitTemplateArgumentList); 1794 if (!HasQualifierOrFoundDecl) 1795 return *reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); 1796 1797 return *reinterpret_cast<ExplicitTemplateArgumentList *>( 1798 getMemberQualifier() + 1); 1799 } 1800 1801 /// \brief Retrieve the explicit template argument list that 1802 /// followed the member template name. This must only be called on 1803 /// an expression with explicit template arguments. 1804 const ExplicitTemplateArgumentList &getExplicitTemplateArgs() const { 1805 return const_cast<MemberExpr *>(this)->getExplicitTemplateArgs(); 1806 } 1807 1808 /// \brief Retrieves the optional explicit template arguments. 1809 /// This points to the same data as getExplicitTemplateArgs(), but 1810 /// returns null if there are no explicit template arguments. 1811 const ExplicitTemplateArgumentList *getOptionalExplicitTemplateArgs() const { 1812 if (!hasExplicitTemplateArgs()) return 0; 1813 return &getExplicitTemplateArgs(); 1814 } 1815 1816 /// \brief Retrieve the location of the left angle bracket following the 1817 /// member name ('<'), if any. 1818 SourceLocation getLAngleLoc() const { 1819 if (!HasExplicitTemplateArgumentList) 1820 return SourceLocation(); 1821 1822 return getExplicitTemplateArgs().LAngleLoc; 1823 } 1824 1825 /// \brief Retrieve the template arguments provided as part of this 1826 /// template-id. 1827 const TemplateArgumentLoc *getTemplateArgs() const { 1828 if (!HasExplicitTemplateArgumentList) 1829 return 0; 1830 1831 return getExplicitTemplateArgs().getTemplateArgs(); 1832 } 1833 1834 /// \brief Retrieve the number of template arguments provided as part of this 1835 /// template-id. 1836 unsigned getNumTemplateArgs() const { 1837 if (!HasExplicitTemplateArgumentList) 1838 return 0; 1839 1840 return getExplicitTemplateArgs().NumTemplateArgs; 1841 } 1842 1843 /// \brief Retrieve the location of the right angle bracket following the 1844 /// template arguments ('>'). 1845 SourceLocation getRAngleLoc() const { 1846 if (!HasExplicitTemplateArgumentList) 1847 return SourceLocation(); 1848 1849 return getExplicitTemplateArgs().RAngleLoc; 1850 } 1851 1852 /// \brief Retrieve the member declaration name info. 1853 DeclarationNameInfo getMemberNameInfo() const { 1854 return DeclarationNameInfo(MemberDecl->getDeclName(), 1855 MemberLoc, MemberDNLoc); 1856 } 1857 1858 bool isArrow() const { return IsArrow; } 1859 void setArrow(bool A) { IsArrow = A; } 1860 1861 /// getMemberLoc - Return the location of the "member", in X->F, it is the 1862 /// location of 'F'. 1863 SourceLocation getMemberLoc() const { return MemberLoc; } 1864 void setMemberLoc(SourceLocation L) { MemberLoc = L; } 1865 1866 virtual SourceRange getSourceRange() const { 1867 // If we have an implicit base (like a C++ implicit this), 1868 // make sure not to return its location 1869 SourceLocation EndLoc = (HasExplicitTemplateArgumentList) 1870 ? getRAngleLoc() : getMemberNameInfo().getEndLoc(); 1871 1872 SourceLocation BaseLoc = getBase()->getLocStart(); 1873 if (BaseLoc.isInvalid()) 1874 return SourceRange(MemberLoc, EndLoc); 1875 return SourceRange(BaseLoc, EndLoc); 1876 } 1877 1878 virtual SourceLocation getExprLoc() const { return MemberLoc; } 1879 1880 static bool classof(const Stmt *T) { 1881 return T->getStmtClass() == MemberExprClass; 1882 } 1883 static bool classof(const MemberExpr *) { return true; } 1884 1885 // Iterators 1886 virtual child_iterator child_begin(); 1887 virtual child_iterator child_end(); 1888 1889 friend class ASTReader; 1890 friend class ASTStmtWriter; 1891}; 1892 1893/// CompoundLiteralExpr - [C99 6.5.2.5] 1894/// 1895class CompoundLiteralExpr : public Expr { 1896 /// LParenLoc - If non-null, this is the location of the left paren in a 1897 /// compound literal like "(int){4}". This can be null if this is a 1898 /// synthesized compound expression. 1899 SourceLocation LParenLoc; 1900 1901 /// The type as written. This can be an incomplete array type, in 1902 /// which case the actual expression type will be different. 1903 TypeSourceInfo *TInfo; 1904 Stmt *Init; 1905 bool FileScope; 1906public: 1907 // FIXME: Can compound literals be value-dependent? 1908 CompoundLiteralExpr(SourceLocation lparenloc, TypeSourceInfo *tinfo, 1909 QualType T, Expr *init, bool fileScope) 1910 : Expr(CompoundLiteralExprClass, T, 1911 tinfo->getType()->isDependentType(), false), 1912 LParenLoc(lparenloc), TInfo(tinfo), Init(init), FileScope(fileScope) {} 1913 1914 /// \brief Construct an empty compound literal. 1915 explicit CompoundLiteralExpr(EmptyShell Empty) 1916 : Expr(CompoundLiteralExprClass, Empty) { } 1917 1918 const Expr *getInitializer() const { return cast<Expr>(Init); } 1919 Expr *getInitializer() { return cast<Expr>(Init); } 1920 void setInitializer(Expr *E) { Init = E; } 1921 1922 bool isFileScope() const { return FileScope; } 1923 void setFileScope(bool FS) { FileScope = FS; } 1924 1925 SourceLocation getLParenLoc() const { return LParenLoc; } 1926 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 1927 1928 TypeSourceInfo *getTypeSourceInfo() const { return TInfo; } 1929 void setTypeSourceInfo(TypeSourceInfo* tinfo) { TInfo = tinfo; } 1930 1931 virtual SourceRange getSourceRange() const { 1932 // FIXME: Init should never be null. 1933 if (!Init) 1934 return SourceRange(); 1935 if (LParenLoc.isInvalid()) 1936 return Init->getSourceRange(); 1937 return SourceRange(LParenLoc, Init->getLocEnd()); 1938 } 1939 1940 static bool classof(const Stmt *T) { 1941 return T->getStmtClass() == CompoundLiteralExprClass; 1942 } 1943 static bool classof(const CompoundLiteralExpr *) { return true; } 1944 1945 // Iterators 1946 virtual child_iterator child_begin(); 1947 virtual child_iterator child_end(); 1948}; 1949 1950/// CastExpr - Base class for type casts, including both implicit 1951/// casts (ImplicitCastExpr) and explicit casts that have some 1952/// representation in the source code (ExplicitCastExpr's derived 1953/// classes). 1954class CastExpr : public Expr { 1955public: 1956 typedef clang::CastKind CastKind; 1957 1958private: 1959 Stmt *Op; 1960 1961 void CheckBasePath() const { 1962#ifndef NDEBUG 1963 switch (getCastKind()) { 1964 case CK_DerivedToBase: 1965 case CK_UncheckedDerivedToBase: 1966 case CK_DerivedToBaseMemberPointer: 1967 case CK_BaseToDerived: 1968 case CK_BaseToDerivedMemberPointer: 1969 assert(!path_empty() && "Cast kind should have a base path!"); 1970 break; 1971 1972 // These should not have an inheritance path. 1973 case CK_Unknown: 1974 case CK_BitCast: 1975 case CK_LValueBitCast: 1976 case CK_NoOp: 1977 case CK_Dynamic: 1978 case CK_ToUnion: 1979 case CK_ArrayToPointerDecay: 1980 case CK_FunctionToPointerDecay: 1981 case CK_NullToMemberPointer: 1982 case CK_UserDefinedConversion: 1983 case CK_ConstructorConversion: 1984 case CK_IntegralToPointer: 1985 case CK_PointerToIntegral: 1986 case CK_ToVoid: 1987 case CK_VectorSplat: 1988 case CK_IntegralCast: 1989 case CK_IntegralToFloating: 1990 case CK_FloatingToIntegral: 1991 case CK_FloatingCast: 1992 case CK_MemberPointerToBoolean: 1993 case CK_AnyPointerToObjCPointerCast: 1994 case CK_AnyPointerToBlockPointerCast: 1995 case CK_ObjCObjectLValueCast: 1996 assert(path_empty() && "Cast kind should not have a base path!"); 1997 break; 1998 } 1999#endif 2000 } 2001 2002 const CXXBaseSpecifier * const *path_buffer() const { 2003 return const_cast<CastExpr*>(this)->path_buffer(); 2004 } 2005 CXXBaseSpecifier **path_buffer(); 2006 2007protected: 2008 CastExpr(StmtClass SC, QualType ty, const CastKind kind, Expr *op, 2009 unsigned BasePathSize) : 2010 Expr(SC, ty, 2011 // Cast expressions are type-dependent if the type is 2012 // dependent (C++ [temp.dep.expr]p3). 2013 ty->isDependentType(), 2014 // Cast expressions are value-dependent if the type is 2015 // dependent or if the subexpression is value-dependent. 2016 ty->isDependentType() || (op && op->isValueDependent())), 2017 Op(op) { 2018 CastExprBits.Kind = kind; 2019 CastExprBits.BasePathSize = BasePathSize; 2020 CheckBasePath(); 2021 } 2022 2023 /// \brief Construct an empty cast. 2024 CastExpr(StmtClass SC, EmptyShell Empty, unsigned BasePathSize) 2025 : Expr(SC, Empty) { 2026 CastExprBits.BasePathSize = BasePathSize; 2027 } 2028 2029public: 2030 CastKind getCastKind() const { return (CastKind) CastExprBits.Kind; } 2031 void setCastKind(CastKind K) { CastExprBits.Kind = K; } 2032 const char *getCastKindName() const; 2033 2034 Expr *getSubExpr() { return cast<Expr>(Op); } 2035 const Expr *getSubExpr() const { return cast<Expr>(Op); } 2036 void setSubExpr(Expr *E) { Op = E; } 2037 2038 /// \brief Retrieve the cast subexpression as it was written in the source 2039 /// code, looking through any implicit casts or other intermediate nodes 2040 /// introduced by semantic analysis. 2041 Expr *getSubExprAsWritten(); 2042 const Expr *getSubExprAsWritten() const { 2043 return const_cast<CastExpr *>(this)->getSubExprAsWritten(); 2044 } 2045 2046 typedef CXXBaseSpecifier **path_iterator; 2047 typedef const CXXBaseSpecifier * const *path_const_iterator; 2048 bool path_empty() const { return CastExprBits.BasePathSize == 0; } 2049 unsigned path_size() const { return CastExprBits.BasePathSize; } 2050 path_iterator path_begin() { return path_buffer(); } 2051 path_iterator path_end() { return path_buffer() + path_size(); } 2052 path_const_iterator path_begin() const { return path_buffer(); } 2053 path_const_iterator path_end() const { return path_buffer() + path_size(); } 2054 2055 void setCastPath(const CXXCastPath &Path); 2056 2057 static bool classof(const Stmt *T) { 2058 return T->getStmtClass() >= firstCastExprConstant && 2059 T->getStmtClass() <= lastCastExprConstant; 2060 } 2061 static bool classof(const CastExpr *) { return true; } 2062 2063 // Iterators 2064 virtual child_iterator child_begin(); 2065 virtual child_iterator child_end(); 2066}; 2067 2068/// ImplicitCastExpr - Allows us to explicitly represent implicit type 2069/// conversions, which have no direct representation in the original 2070/// source code. For example: converting T[]->T*, void f()->void 2071/// (*f)(), float->double, short->int, etc. 2072/// 2073/// In C, implicit casts always produce rvalues. However, in C++, an 2074/// implicit cast whose result is being bound to a reference will be 2075/// an lvalue or xvalue. For example: 2076/// 2077/// @code 2078/// class Base { }; 2079/// class Derived : public Base { }; 2080/// Derived &&ref(); 2081/// void f(Derived d) { 2082/// Base& b = d; // initializer is an ImplicitCastExpr 2083/// // to an lvalue of type Base 2084/// Base&& r = ref(); // initializer is an ImplicitCastExpr 2085/// // to an xvalue of type Base 2086/// } 2087/// @endcode 2088class ImplicitCastExpr : public CastExpr { 2089private: 2090 ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, 2091 unsigned BasePathLength, ExprValueKind VK) 2092 : CastExpr(ImplicitCastExprClass, ty, kind, op, BasePathLength) { 2093 setValueKind(VK); 2094 } 2095 2096 /// \brief Construct an empty implicit cast. 2097 explicit ImplicitCastExpr(EmptyShell Shell, unsigned PathSize) 2098 : CastExpr(ImplicitCastExprClass, Shell, PathSize) { } 2099 2100public: 2101 enum OnStack_t { OnStack }; 2102 ImplicitCastExpr(OnStack_t _, QualType ty, CastKind kind, Expr *op, 2103 ExprValueKind VK) 2104 : CastExpr(ImplicitCastExprClass, ty, kind, op, 0) { 2105 setValueKind(VK); 2106 } 2107 2108 static ImplicitCastExpr *Create(ASTContext &Context, QualType T, 2109 CastKind Kind, Expr *Operand, 2110 const CXXCastPath *BasePath, 2111 ExprValueKind Cat); 2112 2113 static ImplicitCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2114 2115 virtual SourceRange getSourceRange() const { 2116 return getSubExpr()->getSourceRange(); 2117 } 2118 2119 using Expr::getValueKind; 2120 using Expr::setValueKind; 2121 2122 static bool classof(const Stmt *T) { 2123 return T->getStmtClass() == ImplicitCastExprClass; 2124 } 2125 static bool classof(const ImplicitCastExpr *) { return true; } 2126}; 2127 2128/// ExplicitCastExpr - An explicit cast written in the source 2129/// code. 2130/// 2131/// This class is effectively an abstract class, because it provides 2132/// the basic representation of an explicitly-written cast without 2133/// specifying which kind of cast (C cast, functional cast, static 2134/// cast, etc.) was written; specific derived classes represent the 2135/// particular style of cast and its location information. 2136/// 2137/// Unlike implicit casts, explicit cast nodes have two different 2138/// types: the type that was written into the source code, and the 2139/// actual type of the expression as determined by semantic 2140/// analysis. These types may differ slightly. For example, in C++ one 2141/// can cast to a reference type, which indicates that the resulting 2142/// expression will be an lvalue or xvalue. The reference type, however, 2143/// will not be used as the type of the expression. 2144class ExplicitCastExpr : public CastExpr { 2145 /// TInfo - Source type info for the (written) type 2146 /// this expression is casting to. 2147 TypeSourceInfo *TInfo; 2148 2149protected: 2150 ExplicitCastExpr(StmtClass SC, QualType exprTy, CastKind kind, 2151 Expr *op, unsigned PathSize, TypeSourceInfo *writtenTy) 2152 : CastExpr(SC, exprTy, kind, op, PathSize), TInfo(writtenTy) {} 2153 2154 /// \brief Construct an empty explicit cast. 2155 ExplicitCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize) 2156 : CastExpr(SC, Shell, PathSize) { } 2157 2158public: 2159 /// getTypeInfoAsWritten - Returns the type source info for the type 2160 /// that this expression is casting to. 2161 TypeSourceInfo *getTypeInfoAsWritten() const { return TInfo; } 2162 void setTypeInfoAsWritten(TypeSourceInfo *writtenTy) { TInfo = writtenTy; } 2163 2164 /// getTypeAsWritten - Returns the type that this expression is 2165 /// casting to, as written in the source code. 2166 QualType getTypeAsWritten() const { return TInfo->getType(); } 2167 2168 static bool classof(const Stmt *T) { 2169 return T->getStmtClass() >= firstExplicitCastExprConstant && 2170 T->getStmtClass() <= lastExplicitCastExprConstant; 2171 } 2172 static bool classof(const ExplicitCastExpr *) { return true; } 2173}; 2174 2175/// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style 2176/// cast in C++ (C++ [expr.cast]), which uses the syntax 2177/// (Type)expr. For example: @c (int)f. 2178class CStyleCastExpr : public ExplicitCastExpr { 2179 SourceLocation LPLoc; // the location of the left paren 2180 SourceLocation RPLoc; // the location of the right paren 2181 2182 CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, 2183 unsigned PathSize, TypeSourceInfo *writtenTy, 2184 SourceLocation l, SourceLocation r) 2185 : ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, PathSize, 2186 writtenTy), LPLoc(l), RPLoc(r) {} 2187 2188 /// \brief Construct an empty C-style explicit cast. 2189 explicit CStyleCastExpr(EmptyShell Shell, unsigned PathSize) 2190 : ExplicitCastExpr(CStyleCastExprClass, Shell, PathSize) { } 2191 2192public: 2193 static CStyleCastExpr *Create(ASTContext &Context, QualType T, CastKind K, 2194 Expr *Op, const CXXCastPath *BasePath, 2195 TypeSourceInfo *WrittenTy, SourceLocation L, 2196 SourceLocation R); 2197 2198 static CStyleCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize); 2199 2200 SourceLocation getLParenLoc() const { return LPLoc; } 2201 void setLParenLoc(SourceLocation L) { LPLoc = L; } 2202 2203 SourceLocation getRParenLoc() const { return RPLoc; } 2204 void setRParenLoc(SourceLocation L) { RPLoc = L; } 2205 2206 virtual SourceRange getSourceRange() const { 2207 return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); 2208 } 2209 static bool classof(const Stmt *T) { 2210 return T->getStmtClass() == CStyleCastExprClass; 2211 } 2212 static bool classof(const CStyleCastExpr *) { return true; } 2213}; 2214 2215/// \brief A builtin binary operation expression such as "x + y" or "x <= y". 2216/// 2217/// This expression node kind describes a builtin binary operation, 2218/// such as "x + y" for integer values "x" and "y". The operands will 2219/// already have been converted to appropriate types (e.g., by 2220/// performing promotions or conversions). 2221/// 2222/// In C++, where operators may be overloaded, a different kind of 2223/// expression node (CXXOperatorCallExpr) is used to express the 2224/// invocation of an overloaded operator with operator syntax. Within 2225/// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is 2226/// used to store an expression "x + y" depends on the subexpressions 2227/// for x and y. If neither x or y is type-dependent, and the "+" 2228/// operator resolves to a built-in operation, BinaryOperator will be 2229/// used to express the computation (x and y may still be 2230/// value-dependent). If either x or y is type-dependent, or if the 2231/// "+" resolves to an overloaded operator, CXXOperatorCallExpr will 2232/// be used to express the computation. 2233class BinaryOperator : public Expr { 2234public: 2235 typedef BinaryOperatorKind Opcode; 2236 2237private: 2238 unsigned Opc : 6; 2239 SourceLocation OpLoc; 2240 2241 enum { LHS, RHS, END_EXPR }; 2242 Stmt* SubExprs[END_EXPR]; 2243public: 2244 2245 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2246 SourceLocation opLoc) 2247 : Expr(BinaryOperatorClass, ResTy, 2248 lhs->isTypeDependent() || rhs->isTypeDependent(), 2249 lhs->isValueDependent() || rhs->isValueDependent()), 2250 Opc(opc), OpLoc(opLoc) { 2251 SubExprs[LHS] = lhs; 2252 SubExprs[RHS] = rhs; 2253 assert(!isCompoundAssignmentOp() && 2254 "Use ArithAssignBinaryOperator for compound assignments"); 2255 } 2256 2257 /// \brief Construct an empty binary operator. 2258 explicit BinaryOperator(EmptyShell Empty) 2259 : Expr(BinaryOperatorClass, Empty), Opc(BO_Comma) { } 2260 2261 SourceLocation getOperatorLoc() const { return OpLoc; } 2262 void setOperatorLoc(SourceLocation L) { OpLoc = L; } 2263 2264 Opcode getOpcode() const { return static_cast<Opcode>(Opc); } 2265 void setOpcode(Opcode O) { Opc = O; } 2266 2267 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2268 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2269 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2270 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2271 2272 virtual SourceRange getSourceRange() const { 2273 return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); 2274 } 2275 2276 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 2277 /// corresponds to, e.g. "<<=". 2278 static const char *getOpcodeStr(Opcode Op); 2279 2280 const char *getOpcodeStr() const { return getOpcodeStr(getOpcode()); } 2281 2282 /// \brief Retrieve the binary opcode that corresponds to the given 2283 /// overloaded operator. 2284 static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); 2285 2286 /// \brief Retrieve the overloaded operator kind that corresponds to 2287 /// the given binary opcode. 2288 static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); 2289 2290 /// predicates to categorize the respective opcodes. 2291 bool isPtrMemOp() const { return Opc == BO_PtrMemD || Opc == BO_PtrMemI; } 2292 bool isMultiplicativeOp() const { return Opc >= BO_Mul && Opc <= BO_Rem; } 2293 static bool isAdditiveOp(Opcode Opc) { return Opc == BO_Add || Opc==BO_Sub; } 2294 bool isAdditiveOp() const { return isAdditiveOp(getOpcode()); } 2295 static bool isShiftOp(Opcode Opc) { return Opc == BO_Shl || Opc == BO_Shr; } 2296 bool isShiftOp() const { return isShiftOp(getOpcode()); } 2297 2298 static bool isBitwiseOp(Opcode Opc) { return Opc >= BO_And && Opc <= BO_Or; } 2299 bool isBitwiseOp() const { return isBitwiseOp(getOpcode()); } 2300 2301 static bool isRelationalOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_GE; } 2302 bool isRelationalOp() const { return isRelationalOp(getOpcode()); } 2303 2304 static bool isEqualityOp(Opcode Opc) { return Opc == BO_EQ || Opc == BO_NE; } 2305 bool isEqualityOp() const { return isEqualityOp(getOpcode()); } 2306 2307 static bool isComparisonOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_NE; } 2308 bool isComparisonOp() const { return isComparisonOp(getOpcode()); } 2309 2310 static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; } 2311 bool isLogicalOp() const { return isLogicalOp(getOpcode()); } 2312 2313 bool isAssignmentOp() const { return Opc >= BO_Assign && Opc <= BO_OrAssign; } 2314 bool isCompoundAssignmentOp() const { 2315 return Opc > BO_Assign && Opc <= BO_OrAssign; 2316 } 2317 bool isShiftAssignOp() const { 2318 return Opc == BO_ShlAssign || Opc == BO_ShrAssign; 2319 } 2320 2321 static bool classof(const Stmt *S) { 2322 return S->getStmtClass() >= firstBinaryOperatorConstant && 2323 S->getStmtClass() <= lastBinaryOperatorConstant; 2324 } 2325 static bool classof(const BinaryOperator *) { return true; } 2326 2327 // Iterators 2328 virtual child_iterator child_begin(); 2329 virtual child_iterator child_end(); 2330 2331protected: 2332 BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, 2333 SourceLocation opLoc, bool dead) 2334 : Expr(CompoundAssignOperatorClass, ResTy, 2335 lhs->isTypeDependent() || rhs->isTypeDependent(), 2336 lhs->isValueDependent() || rhs->isValueDependent()), 2337 Opc(opc), OpLoc(opLoc) { 2338 SubExprs[LHS] = lhs; 2339 SubExprs[RHS] = rhs; 2340 } 2341 2342 BinaryOperator(StmtClass SC, EmptyShell Empty) 2343 : Expr(SC, Empty), Opc(BO_MulAssign) { } 2344}; 2345 2346/// CompoundAssignOperator - For compound assignments (e.g. +=), we keep 2347/// track of the type the operation is performed in. Due to the semantics of 2348/// these operators, the operands are promoted, the aritmetic performed, an 2349/// implicit conversion back to the result type done, then the assignment takes 2350/// place. This captures the intermediate type which the computation is done 2351/// in. 2352class CompoundAssignOperator : public BinaryOperator { 2353 QualType ComputationLHSType; 2354 QualType ComputationResultType; 2355public: 2356 CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, 2357 QualType ResType, QualType CompLHSType, 2358 QualType CompResultType, 2359 SourceLocation OpLoc) 2360 : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), 2361 ComputationLHSType(CompLHSType), 2362 ComputationResultType(CompResultType) { 2363 assert(isCompoundAssignmentOp() && 2364 "Only should be used for compound assignments"); 2365 } 2366 2367 /// \brief Build an empty compound assignment operator expression. 2368 explicit CompoundAssignOperator(EmptyShell Empty) 2369 : BinaryOperator(CompoundAssignOperatorClass, Empty) { } 2370 2371 // The two computation types are the type the LHS is converted 2372 // to for the computation and the type of the result; the two are 2373 // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). 2374 QualType getComputationLHSType() const { return ComputationLHSType; } 2375 void setComputationLHSType(QualType T) { ComputationLHSType = T; } 2376 2377 QualType getComputationResultType() const { return ComputationResultType; } 2378 void setComputationResultType(QualType T) { ComputationResultType = T; } 2379 2380 static bool classof(const CompoundAssignOperator *) { return true; } 2381 static bool classof(const Stmt *S) { 2382 return S->getStmtClass() == CompoundAssignOperatorClass; 2383 } 2384}; 2385 2386/// ConditionalOperator - The ?: operator. Note that LHS may be null when the 2387/// GNU "missing LHS" extension is in use. 2388/// 2389class ConditionalOperator : public Expr { 2390 enum { COND, LHS, RHS, END_EXPR }; 2391 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2392 Stmt* Save; 2393 SourceLocation QuestionLoc, ColonLoc; 2394public: 2395 ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, 2396 SourceLocation CLoc, Expr *rhs, Expr *save, QualType t) 2397 : Expr(ConditionalOperatorClass, t, 2398 // FIXME: the type of the conditional operator doesn't 2399 // depend on the type of the conditional, but the standard 2400 // seems to imply that it could. File a bug! 2401 ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), 2402 (cond->isValueDependent() || 2403 (lhs && lhs->isValueDependent()) || 2404 (rhs && rhs->isValueDependent()))), 2405 QuestionLoc(QLoc), 2406 ColonLoc(CLoc) { 2407 SubExprs[COND] = cond; 2408 SubExprs[LHS] = lhs; 2409 SubExprs[RHS] = rhs; 2410 Save = save; 2411 } 2412 2413 /// \brief Build an empty conditional operator. 2414 explicit ConditionalOperator(EmptyShell Empty) 2415 : Expr(ConditionalOperatorClass, Empty) { } 2416 2417 // getCond - Return the expression representing the condition for 2418 // the ?: operator. 2419 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2420 void setCond(Expr *E) { SubExprs[COND] = E; } 2421 2422 // getTrueExpr - Return the subexpression representing the value of the ?: 2423 // expression if the condition evaluates to true. 2424 Expr *getTrueExpr() const { 2425 return cast<Expr>(SubExprs[LHS]); 2426 } 2427 2428 // getFalseExpr - Return the subexpression representing the value of the ?: 2429 // expression if the condition evaluates to false. This is the same as getRHS. 2430 Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } 2431 2432 // getSaveExpr - In most cases this value will be null. Except a GCC extension 2433 // allows the left subexpression to be omitted, and instead of that condition 2434 // be returned. e.g: x ?: y is shorthand for x ? x : y, except that the 2435 // expression "x" is only evaluated once. Under this senario, this function 2436 // returns the original, non-converted condition expression for the ?:operator 2437 Expr *getSaveExpr() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2438 2439 Expr *getLHS() const { return Save ? 0 : cast<Expr>(SubExprs[LHS]); } 2440 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2441 2442 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2443 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2444 2445 Expr *getSAVE() const { return Save? cast<Expr>(Save) : (Expr*)0; } 2446 void setSAVE(Expr *E) { Save = E; } 2447 2448 SourceLocation getQuestionLoc() const { return QuestionLoc; } 2449 void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } 2450 2451 SourceLocation getColonLoc() const { return ColonLoc; } 2452 void setColonLoc(SourceLocation L) { ColonLoc = L; } 2453 2454 virtual SourceRange getSourceRange() const { 2455 return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); 2456 } 2457 static bool classof(const Stmt *T) { 2458 return T->getStmtClass() == ConditionalOperatorClass; 2459 } 2460 static bool classof(const ConditionalOperator *) { return true; } 2461 2462 // Iterators 2463 virtual child_iterator child_begin(); 2464 virtual child_iterator child_end(); 2465}; 2466 2467/// AddrLabelExpr - The GNU address of label extension, representing &&label. 2468class AddrLabelExpr : public Expr { 2469 SourceLocation AmpAmpLoc, LabelLoc; 2470 LabelStmt *Label; 2471public: 2472 AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, 2473 QualType t) 2474 : Expr(AddrLabelExprClass, t, false, false), 2475 AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} 2476 2477 /// \brief Build an empty address of a label expression. 2478 explicit AddrLabelExpr(EmptyShell Empty) 2479 : Expr(AddrLabelExprClass, Empty) { } 2480 2481 SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } 2482 void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } 2483 SourceLocation getLabelLoc() const { return LabelLoc; } 2484 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 2485 2486 virtual SourceRange getSourceRange() const { 2487 return SourceRange(AmpAmpLoc, LabelLoc); 2488 } 2489 2490 LabelStmt *getLabel() const { return Label; } 2491 void setLabel(LabelStmt *S) { Label = S; } 2492 2493 static bool classof(const Stmt *T) { 2494 return T->getStmtClass() == AddrLabelExprClass; 2495 } 2496 static bool classof(const AddrLabelExpr *) { return true; } 2497 2498 // Iterators 2499 virtual child_iterator child_begin(); 2500 virtual child_iterator child_end(); 2501}; 2502 2503/// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). 2504/// The StmtExpr contains a single CompoundStmt node, which it evaluates and 2505/// takes the value of the last subexpression. 2506class StmtExpr : public Expr { 2507 Stmt *SubStmt; 2508 SourceLocation LParenLoc, RParenLoc; 2509public: 2510 // FIXME: Does type-dependence need to be computed differently? 2511 StmtExpr(CompoundStmt *substmt, QualType T, 2512 SourceLocation lp, SourceLocation rp) : 2513 Expr(StmtExprClass, T, T->isDependentType(), false), 2514 SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } 2515 2516 /// \brief Build an empty statement expression. 2517 explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } 2518 2519 CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } 2520 const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } 2521 void setSubStmt(CompoundStmt *S) { SubStmt = S; } 2522 2523 virtual SourceRange getSourceRange() const { 2524 return SourceRange(LParenLoc, RParenLoc); 2525 } 2526 2527 SourceLocation getLParenLoc() const { return LParenLoc; } 2528 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 2529 SourceLocation getRParenLoc() const { return RParenLoc; } 2530 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2531 2532 static bool classof(const Stmt *T) { 2533 return T->getStmtClass() == StmtExprClass; 2534 } 2535 static bool classof(const StmtExpr *) { return true; } 2536 2537 // Iterators 2538 virtual child_iterator child_begin(); 2539 virtual child_iterator child_end(); 2540}; 2541 2542/// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. 2543/// This AST node represents a function that returns 1 if two *types* (not 2544/// expressions) are compatible. The result of this built-in function can be 2545/// used in integer constant expressions. 2546class TypesCompatibleExpr : public Expr { 2547 TypeSourceInfo *TInfo1; 2548 TypeSourceInfo *TInfo2; 2549 SourceLocation BuiltinLoc, RParenLoc; 2550public: 2551 TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, 2552 TypeSourceInfo *tinfo1, TypeSourceInfo *tinfo2, 2553 SourceLocation RP) : 2554 Expr(TypesCompatibleExprClass, ReturnType, false, false), 2555 TInfo1(tinfo1), TInfo2(tinfo2), BuiltinLoc(BLoc), RParenLoc(RP) {} 2556 2557 /// \brief Build an empty __builtin_type_compatible_p expression. 2558 explicit TypesCompatibleExpr(EmptyShell Empty) 2559 : Expr(TypesCompatibleExprClass, Empty) { } 2560 2561 TypeSourceInfo *getArgTInfo1() const { return TInfo1; } 2562 void setArgTInfo1(TypeSourceInfo *TInfo) { TInfo1 = TInfo; } 2563 TypeSourceInfo *getArgTInfo2() const { return TInfo2; } 2564 void setArgTInfo2(TypeSourceInfo *TInfo) { TInfo2 = TInfo; } 2565 2566 QualType getArgType1() const { return TInfo1->getType(); } 2567 QualType getArgType2() const { return TInfo2->getType(); } 2568 2569 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2570 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2571 2572 SourceLocation getRParenLoc() const { return RParenLoc; } 2573 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2574 2575 virtual SourceRange getSourceRange() const { 2576 return SourceRange(BuiltinLoc, RParenLoc); 2577 } 2578 static bool classof(const Stmt *T) { 2579 return T->getStmtClass() == TypesCompatibleExprClass; 2580 } 2581 static bool classof(const TypesCompatibleExpr *) { return true; } 2582 2583 // Iterators 2584 virtual child_iterator child_begin(); 2585 virtual child_iterator child_end(); 2586}; 2587 2588/// ShuffleVectorExpr - clang-specific builtin-in function 2589/// __builtin_shufflevector. 2590/// This AST node represents a operator that does a constant 2591/// shuffle, similar to LLVM's shufflevector instruction. It takes 2592/// two vectors and a variable number of constant indices, 2593/// and returns the appropriately shuffled vector. 2594class ShuffleVectorExpr : public Expr { 2595 SourceLocation BuiltinLoc, RParenLoc; 2596 2597 // SubExprs - the list of values passed to the __builtin_shufflevector 2598 // function. The first two are vectors, and the rest are constant 2599 // indices. The number of values in this list is always 2600 // 2+the number of indices in the vector type. 2601 Stmt **SubExprs; 2602 unsigned NumExprs; 2603 2604public: 2605 // FIXME: Can a shufflevector be value-dependent? Does type-dependence need 2606 // to be computed differently? 2607 ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, 2608 QualType Type, SourceLocation BLoc, 2609 SourceLocation RP) : 2610 Expr(ShuffleVectorExprClass, Type, Type->isDependentType(), false), 2611 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(nexpr) { 2612 2613 SubExprs = new (C) Stmt*[nexpr]; 2614 for (unsigned i = 0; i < nexpr; i++) 2615 SubExprs[i] = args[i]; 2616 } 2617 2618 /// \brief Build an empty vector-shuffle expression. 2619 explicit ShuffleVectorExpr(EmptyShell Empty) 2620 : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } 2621 2622 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2623 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2624 2625 SourceLocation getRParenLoc() const { return RParenLoc; } 2626 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2627 2628 virtual SourceRange getSourceRange() const { 2629 return SourceRange(BuiltinLoc, RParenLoc); 2630 } 2631 static bool classof(const Stmt *T) { 2632 return T->getStmtClass() == ShuffleVectorExprClass; 2633 } 2634 static bool classof(const ShuffleVectorExpr *) { return true; } 2635 2636 /// getNumSubExprs - Return the size of the SubExprs array. This includes the 2637 /// constant expression, the actual arguments passed in, and the function 2638 /// pointers. 2639 unsigned getNumSubExprs() const { return NumExprs; } 2640 2641 /// getExpr - Return the Expr at the specified index. 2642 Expr *getExpr(unsigned Index) { 2643 assert((Index < NumExprs) && "Arg access out of range!"); 2644 return cast<Expr>(SubExprs[Index]); 2645 } 2646 const Expr *getExpr(unsigned Index) const { 2647 assert((Index < NumExprs) && "Arg access out of range!"); 2648 return cast<Expr>(SubExprs[Index]); 2649 } 2650 2651 void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); 2652 2653 unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { 2654 assert((N < NumExprs - 2) && "Shuffle idx out of range!"); 2655 return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); 2656 } 2657 2658 // Iterators 2659 virtual child_iterator child_begin(); 2660 virtual child_iterator child_end(); 2661}; 2662 2663/// ChooseExpr - GNU builtin-in function __builtin_choose_expr. 2664/// This AST node is similar to the conditional operator (?:) in C, with 2665/// the following exceptions: 2666/// - the test expression must be a integer constant expression. 2667/// - the expression returned acts like the chosen subexpression in every 2668/// visible way: the type is the same as that of the chosen subexpression, 2669/// and all predicates (whether it's an l-value, whether it's an integer 2670/// constant expression, etc.) return the same result as for the chosen 2671/// sub-expression. 2672class ChooseExpr : public Expr { 2673 enum { COND, LHS, RHS, END_EXPR }; 2674 Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. 2675 SourceLocation BuiltinLoc, RParenLoc; 2676public: 2677 ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, 2678 SourceLocation RP, bool TypeDependent, bool ValueDependent) 2679 : Expr(ChooseExprClass, t, TypeDependent, ValueDependent), 2680 BuiltinLoc(BLoc), RParenLoc(RP) { 2681 SubExprs[COND] = cond; 2682 SubExprs[LHS] = lhs; 2683 SubExprs[RHS] = rhs; 2684 } 2685 2686 /// \brief Build an empty __builtin_choose_expr. 2687 explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } 2688 2689 /// isConditionTrue - Return whether the condition is true (i.e. not 2690 /// equal to zero). 2691 bool isConditionTrue(ASTContext &C) const; 2692 2693 /// getChosenSubExpr - Return the subexpression chosen according to the 2694 /// condition. 2695 Expr *getChosenSubExpr(ASTContext &C) const { 2696 return isConditionTrue(C) ? getLHS() : getRHS(); 2697 } 2698 2699 Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } 2700 void setCond(Expr *E) { SubExprs[COND] = E; } 2701 Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } 2702 void setLHS(Expr *E) { SubExprs[LHS] = E; } 2703 Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } 2704 void setRHS(Expr *E) { SubExprs[RHS] = E; } 2705 2706 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2707 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2708 2709 SourceLocation getRParenLoc() const { return RParenLoc; } 2710 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2711 2712 virtual SourceRange getSourceRange() const { 2713 return SourceRange(BuiltinLoc, RParenLoc); 2714 } 2715 static bool classof(const Stmt *T) { 2716 return T->getStmtClass() == ChooseExprClass; 2717 } 2718 static bool classof(const ChooseExpr *) { return true; } 2719 2720 // Iterators 2721 virtual child_iterator child_begin(); 2722 virtual child_iterator child_end(); 2723}; 2724 2725/// GNUNullExpr - Implements the GNU __null extension, which is a name 2726/// for a null pointer constant that has integral type (e.g., int or 2727/// long) and is the same size and alignment as a pointer. The __null 2728/// extension is typically only used by system headers, which define 2729/// NULL as __null in C++ rather than using 0 (which is an integer 2730/// that may not match the size of a pointer). 2731class GNUNullExpr : public Expr { 2732 /// TokenLoc - The location of the __null keyword. 2733 SourceLocation TokenLoc; 2734 2735public: 2736 GNUNullExpr(QualType Ty, SourceLocation Loc) 2737 : Expr(GNUNullExprClass, Ty, false, false), TokenLoc(Loc) { } 2738 2739 /// \brief Build an empty GNU __null expression. 2740 explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } 2741 2742 /// getTokenLocation - The location of the __null token. 2743 SourceLocation getTokenLocation() const { return TokenLoc; } 2744 void setTokenLocation(SourceLocation L) { TokenLoc = L; } 2745 2746 virtual SourceRange getSourceRange() const { 2747 return SourceRange(TokenLoc); 2748 } 2749 static bool classof(const Stmt *T) { 2750 return T->getStmtClass() == GNUNullExprClass; 2751 } 2752 static bool classof(const GNUNullExpr *) { return true; } 2753 2754 // Iterators 2755 virtual child_iterator child_begin(); 2756 virtual child_iterator child_end(); 2757}; 2758 2759/// VAArgExpr, used for the builtin function __builtin_va_arg. 2760class VAArgExpr : public Expr { 2761 Stmt *Val; 2762 TypeSourceInfo *TInfo; 2763 SourceLocation BuiltinLoc, RParenLoc; 2764public: 2765 VAArgExpr(SourceLocation BLoc, Expr* e, TypeSourceInfo *TInfo, 2766 SourceLocation RPLoc, QualType t) 2767 : Expr(VAArgExprClass, t, t->isDependentType(), false), 2768 Val(e), TInfo(TInfo), 2769 BuiltinLoc(BLoc), 2770 RParenLoc(RPLoc) { } 2771 2772 /// \brief Create an empty __builtin_va_arg expression. 2773 explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } 2774 2775 const Expr *getSubExpr() const { return cast<Expr>(Val); } 2776 Expr *getSubExpr() { return cast<Expr>(Val); } 2777 void setSubExpr(Expr *E) { Val = E; } 2778 2779 TypeSourceInfo *getWrittenTypeInfo() const { return TInfo; } 2780 void setWrittenTypeInfo(TypeSourceInfo *TI) { TInfo = TI; } 2781 2782 SourceLocation getBuiltinLoc() const { return BuiltinLoc; } 2783 void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } 2784 2785 SourceLocation getRParenLoc() const { return RParenLoc; } 2786 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 2787 2788 virtual SourceRange getSourceRange() const { 2789 return SourceRange(BuiltinLoc, RParenLoc); 2790 } 2791 static bool classof(const Stmt *T) { 2792 return T->getStmtClass() == VAArgExprClass; 2793 } 2794 static bool classof(const VAArgExpr *) { return true; } 2795 2796 // Iterators 2797 virtual child_iterator child_begin(); 2798 virtual child_iterator child_end(); 2799}; 2800 2801/// @brief Describes an C or C++ initializer list. 2802/// 2803/// InitListExpr describes an initializer list, which can be used to 2804/// initialize objects of different types, including 2805/// struct/class/union types, arrays, and vectors. For example: 2806/// 2807/// @code 2808/// struct foo x = { 1, { 2, 3 } }; 2809/// @endcode 2810/// 2811/// Prior to semantic analysis, an initializer list will represent the 2812/// initializer list as written by the user, but will have the 2813/// placeholder type "void". This initializer list is called the 2814/// syntactic form of the initializer, and may contain C99 designated 2815/// initializers (represented as DesignatedInitExprs), initializations 2816/// of subobject members without explicit braces, and so on. Clients 2817/// interested in the original syntax of the initializer list should 2818/// use the syntactic form of the initializer list. 2819/// 2820/// After semantic analysis, the initializer list will represent the 2821/// semantic form of the initializer, where the initializations of all 2822/// subobjects are made explicit with nested InitListExpr nodes and 2823/// C99 designators have been eliminated by placing the designated 2824/// initializations into the subobject they initialize. Additionally, 2825/// any "holes" in the initialization, where no initializer has been 2826/// specified for a particular subobject, will be replaced with 2827/// implicitly-generated ImplicitValueInitExpr expressions that 2828/// value-initialize the subobjects. Note, however, that the 2829/// initializer lists may still have fewer initializers than there are 2830/// elements to initialize within the object. 2831/// 2832/// Given the semantic form of the initializer list, one can retrieve 2833/// the original syntactic form of that initializer list (if it 2834/// exists) using getSyntacticForm(). Since many initializer lists 2835/// have the same syntactic and semantic forms, getSyntacticForm() may 2836/// return NULL, indicating that the current initializer list also 2837/// serves as its syntactic form. 2838class InitListExpr : public Expr { 2839 // FIXME: Eliminate this vector in favor of ASTContext allocation 2840 typedef ASTVector<Stmt *> InitExprsTy; 2841 InitExprsTy InitExprs; 2842 SourceLocation LBraceLoc, RBraceLoc; 2843 2844 /// Contains the initializer list that describes the syntactic form 2845 /// written in the source code. 2846 InitListExpr *SyntacticForm; 2847 2848 /// If this initializer list initializes a union, specifies which 2849 /// field within the union will be initialized. 2850 FieldDecl *UnionFieldInit; 2851 2852 /// Whether this initializer list originally had a GNU array-range 2853 /// designator in it. This is a temporary marker used by CodeGen. 2854 bool HadArrayRangeDesignator; 2855 2856public: 2857 InitListExpr(ASTContext &C, SourceLocation lbraceloc, 2858 Expr **initexprs, unsigned numinits, 2859 SourceLocation rbraceloc); 2860 2861 /// \brief Build an empty initializer list. 2862 explicit InitListExpr(ASTContext &C, EmptyShell Empty) 2863 : Expr(InitListExprClass, Empty), InitExprs(C) { } 2864 2865 unsigned getNumInits() const { return InitExprs.size(); } 2866 2867 const Expr *getInit(unsigned Init) const { 2868 assert(Init < getNumInits() && "Initializer access out of range!"); 2869 return cast_or_null<Expr>(InitExprs[Init]); 2870 } 2871 2872 Expr *getInit(unsigned Init) { 2873 assert(Init < getNumInits() && "Initializer access out of range!"); 2874 return cast_or_null<Expr>(InitExprs[Init]); 2875 } 2876 2877 void setInit(unsigned Init, Expr *expr) { 2878 assert(Init < getNumInits() && "Initializer access out of range!"); 2879 InitExprs[Init] = expr; 2880 } 2881 2882 /// \brief Reserve space for some number of initializers. 2883 void reserveInits(ASTContext &C, unsigned NumInits); 2884 2885 /// @brief Specify the number of initializers 2886 /// 2887 /// If there are more than @p NumInits initializers, the remaining 2888 /// initializers will be destroyed. If there are fewer than @p 2889 /// NumInits initializers, NULL expressions will be added for the 2890 /// unknown initializers. 2891 void resizeInits(ASTContext &Context, unsigned NumInits); 2892 2893 /// @brief Updates the initializer at index @p Init with the new 2894 /// expression @p expr, and returns the old expression at that 2895 /// location. 2896 /// 2897 /// When @p Init is out of range for this initializer list, the 2898 /// initializer list will be extended with NULL expressions to 2899 /// accomodate the new entry. 2900 Expr *updateInit(ASTContext &C, unsigned Init, Expr *expr); 2901 2902 /// \brief If this initializes a union, specifies which field in the 2903 /// union to initialize. 2904 /// 2905 /// Typically, this field is the first named field within the 2906 /// union. However, a designated initializer can specify the 2907 /// initialization of a different field within the union. 2908 FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } 2909 void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } 2910 2911 // Explicit InitListExpr's originate from source code (and have valid source 2912 // locations). Implicit InitListExpr's are created by the semantic analyzer. 2913 bool isExplicit() { 2914 return LBraceLoc.isValid() && RBraceLoc.isValid(); 2915 } 2916 2917 SourceLocation getLBraceLoc() const { return LBraceLoc; } 2918 void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } 2919 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2920 void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } 2921 2922 /// @brief Retrieve the initializer list that describes the 2923 /// syntactic form of the initializer. 2924 /// 2925 /// 2926 InitListExpr *getSyntacticForm() const { return SyntacticForm; } 2927 void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } 2928 2929 bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } 2930 void sawArrayRangeDesignator(bool ARD = true) { 2931 HadArrayRangeDesignator = ARD; 2932 } 2933 2934 virtual SourceRange getSourceRange() const { 2935 return SourceRange(LBraceLoc, RBraceLoc); 2936 } 2937 static bool classof(const Stmt *T) { 2938 return T->getStmtClass() == InitListExprClass; 2939 } 2940 static bool classof(const InitListExpr *) { return true; } 2941 2942 // Iterators 2943 virtual child_iterator child_begin(); 2944 virtual child_iterator child_end(); 2945 2946 typedef InitExprsTy::iterator iterator; 2947 typedef InitExprsTy::const_iterator const_iterator; 2948 typedef InitExprsTy::reverse_iterator reverse_iterator; 2949 typedef InitExprsTy::const_reverse_iterator const_reverse_iterator; 2950 2951 iterator begin() { return InitExprs.begin(); } 2952 const_iterator begin() const { return InitExprs.begin(); } 2953 iterator end() { return InitExprs.end(); } 2954 const_iterator end() const { return InitExprs.end(); } 2955 reverse_iterator rbegin() { return InitExprs.rbegin(); } 2956 const_reverse_iterator rbegin() const { return InitExprs.rbegin(); } 2957 reverse_iterator rend() { return InitExprs.rend(); } 2958 const_reverse_iterator rend() const { return InitExprs.rend(); } 2959}; 2960 2961/// @brief Represents a C99 designated initializer expression. 2962/// 2963/// A designated initializer expression (C99 6.7.8) contains one or 2964/// more designators (which can be field designators, array 2965/// designators, or GNU array-range designators) followed by an 2966/// expression that initializes the field or element(s) that the 2967/// designators refer to. For example, given: 2968/// 2969/// @code 2970/// struct point { 2971/// double x; 2972/// double y; 2973/// }; 2974/// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; 2975/// @endcode 2976/// 2977/// The InitListExpr contains three DesignatedInitExprs, the first of 2978/// which covers @c [2].y=1.0. This DesignatedInitExpr will have two 2979/// designators, one array designator for @c [2] followed by one field 2980/// designator for @c .y. The initalization expression will be 1.0. 2981class DesignatedInitExpr : public Expr { 2982public: 2983 /// \brief Forward declaration of the Designator class. 2984 class Designator; 2985 2986private: 2987 /// The location of the '=' or ':' prior to the actual initializer 2988 /// expression. 2989 SourceLocation EqualOrColonLoc; 2990 2991 /// Whether this designated initializer used the GNU deprecated 2992 /// syntax rather than the C99 '=' syntax. 2993 bool GNUSyntax : 1; 2994 2995 /// The number of designators in this initializer expression. 2996 unsigned NumDesignators : 15; 2997 2998 /// \brief The designators in this designated initialization 2999 /// expression. 3000 Designator *Designators; 3001 3002 /// The number of subexpressions of this initializer expression, 3003 /// which contains both the initializer and any additional 3004 /// expressions used by array and array-range designators. 3005 unsigned NumSubExprs : 16; 3006 3007 3008 DesignatedInitExpr(ASTContext &C, QualType Ty, unsigned NumDesignators, 3009 const Designator *Designators, 3010 SourceLocation EqualOrColonLoc, bool GNUSyntax, 3011 Expr **IndexExprs, unsigned NumIndexExprs, 3012 Expr *Init); 3013 3014 explicit DesignatedInitExpr(unsigned NumSubExprs) 3015 : Expr(DesignatedInitExprClass, EmptyShell()), 3016 NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } 3017 3018public: 3019 /// A field designator, e.g., ".x". 3020 struct FieldDesignator { 3021 /// Refers to the field that is being initialized. The low bit 3022 /// of this field determines whether this is actually a pointer 3023 /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When 3024 /// initially constructed, a field designator will store an 3025 /// IdentifierInfo*. After semantic analysis has resolved that 3026 /// name, the field designator will instead store a FieldDecl*. 3027 uintptr_t NameOrField; 3028 3029 /// The location of the '.' in the designated initializer. 3030 unsigned DotLoc; 3031 3032 /// The location of the field name in the designated initializer. 3033 unsigned FieldLoc; 3034 }; 3035 3036 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3037 struct ArrayOrRangeDesignator { 3038 /// Location of the first index expression within the designated 3039 /// initializer expression's list of subexpressions. 3040 unsigned Index; 3041 /// The location of the '[' starting the array range designator. 3042 unsigned LBracketLoc; 3043 /// The location of the ellipsis separating the start and end 3044 /// indices. Only valid for GNU array-range designators. 3045 unsigned EllipsisLoc; 3046 /// The location of the ']' terminating the array range designator. 3047 unsigned RBracketLoc; 3048 }; 3049 3050 /// @brief Represents a single C99 designator. 3051 /// 3052 /// @todo This class is infuriatingly similar to clang::Designator, 3053 /// but minor differences (storing indices vs. storing pointers) 3054 /// keep us from reusing it. Try harder, later, to rectify these 3055 /// differences. 3056 class Designator { 3057 /// @brief The kind of designator this describes. 3058 enum { 3059 FieldDesignator, 3060 ArrayDesignator, 3061 ArrayRangeDesignator 3062 } Kind; 3063 3064 union { 3065 /// A field designator, e.g., ".x". 3066 struct FieldDesignator Field; 3067 /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". 3068 struct ArrayOrRangeDesignator ArrayOrRange; 3069 }; 3070 friend class DesignatedInitExpr; 3071 3072 public: 3073 Designator() {} 3074 3075 /// @brief Initializes a field designator. 3076 Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, 3077 SourceLocation FieldLoc) 3078 : Kind(FieldDesignator) { 3079 Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; 3080 Field.DotLoc = DotLoc.getRawEncoding(); 3081 Field.FieldLoc = FieldLoc.getRawEncoding(); 3082 } 3083 3084 /// @brief Initializes an array designator. 3085 Designator(unsigned Index, SourceLocation LBracketLoc, 3086 SourceLocation RBracketLoc) 3087 : Kind(ArrayDesignator) { 3088 ArrayOrRange.Index = Index; 3089 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3090 ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); 3091 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3092 } 3093 3094 /// @brief Initializes a GNU array-range designator. 3095 Designator(unsigned Index, SourceLocation LBracketLoc, 3096 SourceLocation EllipsisLoc, SourceLocation RBracketLoc) 3097 : Kind(ArrayRangeDesignator) { 3098 ArrayOrRange.Index = Index; 3099 ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); 3100 ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); 3101 ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); 3102 } 3103 3104 bool isFieldDesignator() const { return Kind == FieldDesignator; } 3105 bool isArrayDesignator() const { return Kind == ArrayDesignator; } 3106 bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } 3107 3108 IdentifierInfo * getFieldName(); 3109 3110 FieldDecl *getField() { 3111 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3112 if (Field.NameOrField & 0x01) 3113 return 0; 3114 else 3115 return reinterpret_cast<FieldDecl *>(Field.NameOrField); 3116 } 3117 3118 void setField(FieldDecl *FD) { 3119 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3120 Field.NameOrField = reinterpret_cast<uintptr_t>(FD); 3121 } 3122 3123 SourceLocation getDotLoc() const { 3124 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3125 return SourceLocation::getFromRawEncoding(Field.DotLoc); 3126 } 3127 3128 SourceLocation getFieldLoc() const { 3129 assert(Kind == FieldDesignator && "Only valid on a field designator"); 3130 return SourceLocation::getFromRawEncoding(Field.FieldLoc); 3131 } 3132 3133 SourceLocation getLBracketLoc() const { 3134 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3135 "Only valid on an array or array-range designator"); 3136 return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); 3137 } 3138 3139 SourceLocation getRBracketLoc() const { 3140 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3141 "Only valid on an array or array-range designator"); 3142 return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); 3143 } 3144 3145 SourceLocation getEllipsisLoc() const { 3146 assert(Kind == ArrayRangeDesignator && 3147 "Only valid on an array-range designator"); 3148 return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); 3149 } 3150 3151 unsigned getFirstExprIndex() const { 3152 assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && 3153 "Only valid on an array or array-range designator"); 3154 return ArrayOrRange.Index; 3155 } 3156 3157 SourceLocation getStartLocation() const { 3158 if (Kind == FieldDesignator) 3159 return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); 3160 else 3161 return getLBracketLoc(); 3162 } 3163 }; 3164 3165 static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, 3166 unsigned NumDesignators, 3167 Expr **IndexExprs, unsigned NumIndexExprs, 3168 SourceLocation EqualOrColonLoc, 3169 bool GNUSyntax, Expr *Init); 3170 3171 static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); 3172 3173 /// @brief Returns the number of designators in this initializer. 3174 unsigned size() const { return NumDesignators; } 3175 3176 // Iterator access to the designators. 3177 typedef Designator* designators_iterator; 3178 designators_iterator designators_begin() { return Designators; } 3179 designators_iterator designators_end() { 3180 return Designators + NumDesignators; 3181 } 3182 3183 Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } 3184 3185 void setDesignators(ASTContext &C, const Designator *Desigs, 3186 unsigned NumDesigs); 3187 3188 Expr *getArrayIndex(const Designator& D); 3189 Expr *getArrayRangeStart(const Designator& D); 3190 Expr *getArrayRangeEnd(const Designator& D); 3191 3192 /// @brief Retrieve the location of the '=' that precedes the 3193 /// initializer value itself, if present. 3194 SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } 3195 void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } 3196 3197 /// @brief Determines whether this designated initializer used the 3198 /// deprecated GNU syntax for designated initializers. 3199 bool usesGNUSyntax() const { return GNUSyntax; } 3200 void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } 3201 3202 /// @brief Retrieve the initializer value. 3203 Expr *getInit() const { 3204 return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); 3205 } 3206 3207 void setInit(Expr *init) { 3208 *child_begin() = init; 3209 } 3210 3211 /// \brief Retrieve the total number of subexpressions in this 3212 /// designated initializer expression, including the actual 3213 /// initialized value and any expressions that occur within array 3214 /// and array-range designators. 3215 unsigned getNumSubExprs() const { return NumSubExprs; } 3216 3217 Expr *getSubExpr(unsigned Idx) { 3218 assert(Idx < NumSubExprs && "Subscript out of range"); 3219 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3220 Ptr += sizeof(DesignatedInitExpr); 3221 return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; 3222 } 3223 3224 void setSubExpr(unsigned Idx, Expr *E) { 3225 assert(Idx < NumSubExprs && "Subscript out of range"); 3226 char* Ptr = static_cast<char*>(static_cast<void *>(this)); 3227 Ptr += sizeof(DesignatedInitExpr); 3228 reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; 3229 } 3230 3231 /// \brief Replaces the designator at index @p Idx with the series 3232 /// of designators in [First, Last). 3233 void ExpandDesignator(ASTContext &C, unsigned Idx, const Designator *First, 3234 const Designator *Last); 3235 3236 virtual SourceRange getSourceRange() const; 3237 3238 static bool classof(const Stmt *T) { 3239 return T->getStmtClass() == DesignatedInitExprClass; 3240 } 3241 static bool classof(const DesignatedInitExpr *) { return true; } 3242 3243 // Iterators 3244 virtual child_iterator child_begin(); 3245 virtual child_iterator child_end(); 3246}; 3247 3248/// \brief Represents an implicitly-generated value initialization of 3249/// an object of a given type. 3250/// 3251/// Implicit value initializations occur within semantic initializer 3252/// list expressions (InitListExpr) as placeholders for subobject 3253/// initializations not explicitly specified by the user. 3254/// 3255/// \see InitListExpr 3256class ImplicitValueInitExpr : public Expr { 3257public: 3258 explicit ImplicitValueInitExpr(QualType ty) 3259 : Expr(ImplicitValueInitExprClass, ty, false, false) { } 3260 3261 /// \brief Construct an empty implicit value initialization. 3262 explicit ImplicitValueInitExpr(EmptyShell Empty) 3263 : Expr(ImplicitValueInitExprClass, Empty) { } 3264 3265 static bool classof(const Stmt *T) { 3266 return T->getStmtClass() == ImplicitValueInitExprClass; 3267 } 3268 static bool classof(const ImplicitValueInitExpr *) { return true; } 3269 3270 virtual SourceRange getSourceRange() const { 3271 return SourceRange(); 3272 } 3273 3274 // Iterators 3275 virtual child_iterator child_begin(); 3276 virtual child_iterator child_end(); 3277}; 3278 3279 3280class ParenListExpr : public Expr { 3281 Stmt **Exprs; 3282 unsigned NumExprs; 3283 SourceLocation LParenLoc, RParenLoc; 3284 3285public: 3286 ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, 3287 unsigned numexprs, SourceLocation rparenloc); 3288 3289 /// \brief Build an empty paren list. 3290 explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } 3291 3292 unsigned getNumExprs() const { return NumExprs; } 3293 3294 const Expr* getExpr(unsigned Init) const { 3295 assert(Init < getNumExprs() && "Initializer access out of range!"); 3296 return cast_or_null<Expr>(Exprs[Init]); 3297 } 3298 3299 Expr* getExpr(unsigned Init) { 3300 assert(Init < getNumExprs() && "Initializer access out of range!"); 3301 return cast_or_null<Expr>(Exprs[Init]); 3302 } 3303 3304 Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } 3305 3306 SourceLocation getLParenLoc() const { return LParenLoc; } 3307 SourceLocation getRParenLoc() const { return RParenLoc; } 3308 3309 virtual SourceRange getSourceRange() const { 3310 return SourceRange(LParenLoc, RParenLoc); 3311 } 3312 static bool classof(const Stmt *T) { 3313 return T->getStmtClass() == ParenListExprClass; 3314 } 3315 static bool classof(const ParenListExpr *) { return true; } 3316 3317 // Iterators 3318 virtual child_iterator child_begin(); 3319 virtual child_iterator child_end(); 3320 3321 friend class ASTStmtReader; 3322 friend class ASTStmtWriter; 3323}; 3324 3325 3326//===----------------------------------------------------------------------===// 3327// Clang Extensions 3328//===----------------------------------------------------------------------===// 3329 3330 3331/// ExtVectorElementExpr - This represents access to specific elements of a 3332/// vector, and may occur on the left hand side or right hand side. For example 3333/// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. 3334/// 3335/// Note that the base may have either vector or pointer to vector type, just 3336/// like a struct field reference. 3337/// 3338class ExtVectorElementExpr : public Expr { 3339 Stmt *Base; 3340 IdentifierInfo *Accessor; 3341 SourceLocation AccessorLoc; 3342public: 3343 ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, 3344 SourceLocation loc) 3345 : Expr(ExtVectorElementExprClass, ty, base->isTypeDependent(), 3346 base->isValueDependent()), 3347 Base(base), Accessor(&accessor), AccessorLoc(loc) {} 3348 3349 /// \brief Build an empty vector element expression. 3350 explicit ExtVectorElementExpr(EmptyShell Empty) 3351 : Expr(ExtVectorElementExprClass, Empty) { } 3352 3353 const Expr *getBase() const { return cast<Expr>(Base); } 3354 Expr *getBase() { return cast<Expr>(Base); } 3355 void setBase(Expr *E) { Base = E; } 3356 3357 IdentifierInfo &getAccessor() const { return *Accessor; } 3358 void setAccessor(IdentifierInfo *II) { Accessor = II; } 3359 3360 SourceLocation getAccessorLoc() const { return AccessorLoc; } 3361 void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } 3362 3363 /// getNumElements - Get the number of components being selected. 3364 unsigned getNumElements() const; 3365 3366 /// containsDuplicateElements - Return true if any element access is 3367 /// repeated. 3368 bool containsDuplicateElements() const; 3369 3370 /// getEncodedElementAccess - Encode the elements accessed into an llvm 3371 /// aggregate Constant of ConstantInt(s). 3372 void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; 3373 3374 virtual SourceRange getSourceRange() const { 3375 return SourceRange(getBase()->getLocStart(), AccessorLoc); 3376 } 3377 3378 /// isArrow - Return true if the base expression is a pointer to vector, 3379 /// return false if the base expression is a vector. 3380 bool isArrow() const; 3381 3382 static bool classof(const Stmt *T) { 3383 return T->getStmtClass() == ExtVectorElementExprClass; 3384 } 3385 static bool classof(const ExtVectorElementExpr *) { return true; } 3386 3387 // Iterators 3388 virtual child_iterator child_begin(); 3389 virtual child_iterator child_end(); 3390}; 3391 3392 3393/// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. 3394/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } 3395class BlockExpr : public Expr { 3396protected: 3397 BlockDecl *TheBlock; 3398 bool HasBlockDeclRefExprs; 3399public: 3400 BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) 3401 : Expr(BlockExprClass, ty, ty->isDependentType(), false), 3402 TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} 3403 3404 /// \brief Build an empty block expression. 3405 explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } 3406 3407 const BlockDecl *getBlockDecl() const { return TheBlock; } 3408 BlockDecl *getBlockDecl() { return TheBlock; } 3409 void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } 3410 3411 // Convenience functions for probing the underlying BlockDecl. 3412 SourceLocation getCaretLocation() const; 3413 const Stmt *getBody() const; 3414 Stmt *getBody(); 3415 3416 virtual SourceRange getSourceRange() const { 3417 return SourceRange(getCaretLocation(), getBody()->getLocEnd()); 3418 } 3419 3420 /// getFunctionType - Return the underlying function type for this block. 3421 const FunctionType *getFunctionType() const; 3422 3423 /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr 3424 /// inside of the block that reference values outside the block. 3425 bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } 3426 void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } 3427 3428 static bool classof(const Stmt *T) { 3429 return T->getStmtClass() == BlockExprClass; 3430 } 3431 static bool classof(const BlockExpr *) { return true; } 3432 3433 // Iterators 3434 virtual child_iterator child_begin(); 3435 virtual child_iterator child_end(); 3436}; 3437 3438/// BlockDeclRefExpr - A reference to a declared variable, function, 3439/// enum, etc. 3440class BlockDeclRefExpr : public Expr { 3441 ValueDecl *D; 3442 SourceLocation Loc; 3443 bool IsByRef : 1; 3444 bool ConstQualAdded : 1; 3445 Stmt *CopyConstructorVal; 3446public: 3447 // FIXME: Fix type/value dependence! 3448 BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, 3449 bool constAdded = false, 3450 Stmt *copyConstructorVal = 0) 3451 : Expr(BlockDeclRefExprClass, t, (!t.isNull() && t->isDependentType()),false), 3452 D(d), Loc(l), IsByRef(ByRef), 3453 ConstQualAdded(constAdded), CopyConstructorVal(copyConstructorVal) {} 3454 3455 // \brief Build an empty reference to a declared variable in a 3456 // block. 3457 explicit BlockDeclRefExpr(EmptyShell Empty) 3458 : Expr(BlockDeclRefExprClass, Empty) { } 3459 3460 ValueDecl *getDecl() { return D; } 3461 const ValueDecl *getDecl() const { return D; } 3462 void setDecl(ValueDecl *VD) { D = VD; } 3463 3464 SourceLocation getLocation() const { return Loc; } 3465 void setLocation(SourceLocation L) { Loc = L; } 3466 3467 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 3468 3469 bool isByRef() const { return IsByRef; } 3470 void setByRef(bool BR) { IsByRef = BR; } 3471 3472 bool isConstQualAdded() const { return ConstQualAdded; } 3473 void setConstQualAdded(bool C) { ConstQualAdded = C; } 3474 3475 const Expr *getCopyConstructorExpr() const 3476 { return cast_or_null<Expr>(CopyConstructorVal); } 3477 Expr *getCopyConstructorExpr() 3478 { return cast_or_null<Expr>(CopyConstructorVal); } 3479 void setCopyConstructorExpr(Expr *E) { CopyConstructorVal = E; } 3480 3481 static bool classof(const Stmt *T) { 3482 return T->getStmtClass() == BlockDeclRefExprClass; 3483 } 3484 static bool classof(const BlockDeclRefExpr *) { return true; } 3485 3486 // Iterators 3487 virtual child_iterator child_begin(); 3488 virtual child_iterator child_end(); 3489}; 3490 3491} // end namespace clang 3492 3493#endif 3494