| //===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the Expr interface and subclasses. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_AST_EXPR_H |
| #define LLVM_CLANG_AST_EXPR_H |
| |
| #include "clang/AST/APValue.h" |
| #include "clang/AST/Stmt.h" |
| #include "clang/AST/Type.h" |
| #include "llvm/ADT/APSInt.h" |
| #include "llvm/ADT/APFloat.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include <vector> |
| |
| namespace clang { |
| class ASTContext; |
| class APValue; |
| class Decl; |
| class IdentifierInfo; |
| class ParmVarDecl; |
| class NamedDecl; |
| class ValueDecl; |
| class BlockDecl; |
| class CXXOperatorCallExpr; |
| class CXXMemberCallExpr; |
| |
| /// Expr - This represents one expression. Note that Expr's are subclasses of |
| /// Stmt. This allows an expression to be transparently used any place a Stmt |
| /// is required. |
| /// |
| class Expr : public Stmt { |
| QualType TR; |
| |
| protected: |
| /// TypeDependent - Whether this expression is type-dependent |
| /// (C++ [temp.dep.expr]). |
| bool TypeDependent : 1; |
| |
| /// ValueDependent - Whether this expression is value-dependent |
| /// (C++ [temp.dep.constexpr]). |
| bool ValueDependent : 1; |
| |
| // FIXME: Eventually, this constructor should go away and we should |
| // require every subclass to provide type/value-dependence |
| // information. |
| Expr(StmtClass SC, QualType T) |
| : Stmt(SC), TypeDependent(false), ValueDependent(false) { |
| setType(T); |
| } |
| |
| Expr(StmtClass SC, QualType T, bool TD, bool VD) |
| : Stmt(SC), TypeDependent(TD), ValueDependent(VD) { |
| setType(T); |
| } |
| |
| /// \brief Construct an empty expression. |
| explicit Expr(StmtClass SC, EmptyShell) : Stmt(SC) { } |
| |
| public: |
| /// \brief Increases the reference count for this expression. |
| /// |
| /// Invoke the Retain() operation when this expression |
| /// is being shared by another owner. |
| Expr *Retain() { |
| Stmt::Retain(); |
| return this; |
| } |
| |
| QualType getType() const { return TR; } |
| void setType(QualType t) { |
| // In C++, the type of an expression is always adjusted so that it |
| // will not have reference type an expression will never have |
| // reference type (C++ [expr]p6). Use |
| // QualType::getNonReferenceType() to retrieve the non-reference |
| // type. Additionally, inspect Expr::isLvalue to determine whether |
| // an expression that is adjusted in this manner should be |
| // considered an lvalue. |
| assert((TR.isNull() || !TR->isReferenceType()) && |
| "Expressions can't have reference type"); |
| |
| TR = t; |
| } |
| |
| /// isValueDependent - Determines whether this expression is |
| /// value-dependent (C++ [temp.dep.constexpr]). For example, the |
| /// array bound of "Chars" in the following example is |
| /// value-dependent. |
| /// @code |
| /// template<int Size, char (&Chars)[Size]> struct meta_string; |
| /// @endcode |
| bool isValueDependent() const { return ValueDependent; } |
| |
| /// \brief Set whether this expression is value-dependent or not. |
| void setValueDependent(bool VD) { ValueDependent = VD; } |
| |
| /// isTypeDependent - Determines whether this expression is |
| /// type-dependent (C++ [temp.dep.expr]), which means that its type |
| /// could change from one template instantiation to the next. For |
| /// example, the expressions "x" and "x + y" are type-dependent in |
| /// the following code, but "y" is not type-dependent: |
| /// @code |
| /// template<typename T> |
| /// void add(T x, int y) { |
| /// x + y; |
| /// } |
| /// @endcode |
| bool isTypeDependent() const { return TypeDependent; } |
| |
| /// \brief Set whether this expression is type-dependent or not. |
| void setTypeDependent(bool TD) { TypeDependent = TD; } |
| |
| /// SourceLocation tokens are not useful in isolation - they are low level |
| /// value objects created/interpreted by SourceManager. We assume AST |
| /// clients will have a pointer to the respective SourceManager. |
| virtual SourceRange getSourceRange() const = 0; |
| |
| /// getExprLoc - Return the preferred location for the arrow when diagnosing |
| /// a problem with a generic expression. |
| virtual SourceLocation getExprLoc() const { return getLocStart(); } |
| |
| /// isUnusedResultAWarning - Return true if this immediate expression should |
| /// be warned about if the result is unused. If so, fill in Loc and Ranges |
| /// with location to warn on and the source range[s] to report with the |
| /// warning. |
| bool isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1, |
| SourceRange &R2) const; |
| |
| /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or |
| /// incomplete type other than void. Nonarray expressions that can be lvalues: |
| /// - name, where name must be a variable |
| /// - e[i] |
| /// - (e), where e must be an lvalue |
| /// - e.name, where e must be an lvalue |
| /// - e->name |
| /// - *e, the type of e cannot be a function type |
| /// - string-constant |
| /// - reference type [C++ [expr]] |
| /// - b ? x : y, where x and y are lvalues of suitable types [C++] |
| /// |
| enum isLvalueResult { |
| LV_Valid, |
| LV_NotObjectType, |
| LV_IncompleteVoidType, |
| LV_DuplicateVectorComponents, |
| LV_InvalidExpression, |
| LV_MemberFunction |
| }; |
| isLvalueResult isLvalue(ASTContext &Ctx) const; |
| |
| // Same as above, but excluding checks for non-object and void types in C |
| isLvalueResult isLvalueInternal(ASTContext &Ctx) const; |
| |
| /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, |
| /// does not have an incomplete type, does not have a const-qualified type, |
| /// and if it is a structure or union, does not have any member (including, |
| /// recursively, any member or element of all contained aggregates or unions) |
| /// with a const-qualified type. |
| /// |
| /// \param Loc [in] [out] - A source location which *may* be filled |
| /// in with the location of the expression making this a |
| /// non-modifiable lvalue, if specified. |
| enum isModifiableLvalueResult { |
| MLV_Valid, |
| MLV_NotObjectType, |
| MLV_IncompleteVoidType, |
| MLV_DuplicateVectorComponents, |
| MLV_InvalidExpression, |
| MLV_LValueCast, // Specialized form of MLV_InvalidExpression. |
| MLV_IncompleteType, |
| MLV_ConstQualified, |
| MLV_ArrayType, |
| MLV_NotBlockQualified, |
| MLV_ReadonlyProperty, |
| MLV_NoSetterProperty, |
| MLV_MemberFunction |
| }; |
| isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx, |
| SourceLocation *Loc = 0) const; |
| |
| /// \brief If this expression refers to a bit-field, retrieve the |
| /// declaration of that bit-field. |
| FieldDecl *getBitField(); |
| |
| const FieldDecl *getBitField() const { |
| return const_cast<Expr*>(this)->getBitField(); |
| } |
| |
| /// isIntegerConstantExpr - Return true if this expression is a valid integer |
| /// constant expression, and, if so, return its value in Result. If not a |
| /// valid i-c-e, return false and fill in Loc (if specified) with the location |
| /// of the invalid expression. |
| bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, |
| SourceLocation *Loc = 0, |
| bool isEvaluated = true) const; |
| bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { |
| llvm::APSInt X; |
| return isIntegerConstantExpr(X, Ctx, Loc); |
| } |
| /// isConstantInitializer - Returns true if this expression is a constant |
| /// initializer, which can be emitted at compile-time. |
| bool isConstantInitializer(ASTContext &Ctx) const; |
| |
| /// EvalResult is a struct with detailed info about an evaluated expression. |
| struct EvalResult { |
| /// Val - This is the value the expression can be folded to. |
| APValue Val; |
| |
| /// HasSideEffects - Whether the evaluated expression has side effects. |
| /// For example, (f() && 0) can be folded, but it still has side effects. |
| bool HasSideEffects; |
| |
| /// Diag - If the expression is unfoldable, then Diag contains a note |
| /// diagnostic indicating why it's not foldable. DiagLoc indicates a caret |
| /// position for the error, and DiagExpr is the expression that caused |
| /// the error. |
| /// If the expression is foldable, but not an integer constant expression, |
| /// Diag contains a note diagnostic that describes why it isn't an integer |
| /// constant expression. If the expression *is* an integer constant |
| /// expression, then Diag will be zero. |
| unsigned Diag; |
| const Expr *DiagExpr; |
| SourceLocation DiagLoc; |
| |
| EvalResult() : HasSideEffects(false), Diag(0), DiagExpr(0) {} |
| }; |
| |
| /// Evaluate - Return true if this is a constant which we can fold using |
| /// any crazy technique (that has nothing to do with language standards) that |
| /// we want to. If this function returns true, it returns the folded constant |
| /// in Result. |
| bool Evaluate(EvalResult &Result, ASTContext &Ctx) const; |
| |
| /// isEvaluatable - Call Evaluate to see if this expression can be constant |
| /// folded, but discard the result. |
| bool isEvaluatable(ASTContext &Ctx) const; |
| |
| /// EvaluateAsInt - Call Evaluate and return the folded integer. This |
| /// must be called on an expression that constant folds to an integer. |
| llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const; |
| |
| /// EvaluateAsLValue - Evaluate an expression to see if it's a lvalue |
| /// with link time known address. |
| bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const; |
| |
| /// EvaluateAsAnyLValue - The same as EvaluateAsLValue, except that it |
| /// also succeeds on stack based, immutable address lvalues. |
| bool EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const; |
| |
| /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an |
| /// integer constant expression with the value zero, or if this is one that is |
| /// cast to void*. |
| bool isNullPointerConstant(ASTContext &Ctx) const; |
| |
| /// isOBJCGCCandidate - Return true if this expression may be used in a read/ |
| /// write barrier. |
| bool isOBJCGCCandidate(ASTContext &Ctx) const; |
| |
| /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return |
| /// its subexpression. If that subexpression is also a ParenExpr, |
| /// then this method recursively returns its subexpression, and so forth. |
| /// Otherwise, the method returns the current Expr. |
| Expr* IgnoreParens(); |
| |
| /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr |
| /// or CastExprs, returning their operand. |
| Expr *IgnoreParenCasts(); |
| |
| /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the |
| /// value (including ptr->int casts of the same size). Strip off any |
| /// ParenExpr or CastExprs, returning their operand. |
| Expr *IgnoreParenNoopCasts(ASTContext &Ctx); |
| |
| const Expr* IgnoreParens() const { |
| return const_cast<Expr*>(this)->IgnoreParens(); |
| } |
| const Expr *IgnoreParenCasts() const { |
| return const_cast<Expr*>(this)->IgnoreParenCasts(); |
| } |
| const Expr *IgnoreParenNoopCasts(ASTContext &Ctx) const { |
| return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx); |
| } |
| |
| static bool hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs); |
| static bool hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs); |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() >= firstExprConstant && |
| T->getStmtClass() <= lastExprConstant; |
| } |
| static bool classof(const Expr *) { return true; } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Primary Expressions. |
| //===----------------------------------------------------------------------===// |
| |
| /// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, |
| /// enum, etc. |
| class DeclRefExpr : public Expr { |
| NamedDecl *D; |
| SourceLocation Loc; |
| |
| protected: |
| // FIXME: Eventually, this constructor will go away and all subclasses |
| // will have to provide the type- and value-dependent flags. |
| DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l) : |
| Expr(SC, t), D(d), Loc(l) {} |
| |
| DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l, bool TD, |
| bool VD) : |
| Expr(SC, t, TD, VD), D(d), Loc(l) {} |
| |
| public: |
| // FIXME: Eventually, this constructor will go away and all clients |
| // will have to provide the type- and value-dependent flags. |
| DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l) : |
| Expr(DeclRefExprClass, t), D(d), Loc(l) {} |
| |
| DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l, bool TD, bool VD) : |
| Expr(DeclRefExprClass, t, TD, VD), D(d), Loc(l) {} |
| |
| /// \brief Construct an empty declaration reference expression. |
| explicit DeclRefExpr(EmptyShell Empty) |
| : Expr(DeclRefExprClass, Empty) { } |
| |
| NamedDecl *getDecl() { return D; } |
| const NamedDecl *getDecl() const { return D; } |
| void setDecl(NamedDecl *NewD) { D = NewD; } |
| |
| SourceLocation getLocation() const { return Loc; } |
| void setLocation(SourceLocation L) { Loc = L; } |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == DeclRefExprClass || |
| T->getStmtClass() == CXXConditionDeclExprClass || |
| T->getStmtClass() == QualifiedDeclRefExprClass; |
| } |
| static bool classof(const DeclRefExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. |
| class PredefinedExpr : public Expr { |
| public: |
| enum IdentType { |
| Func, |
| Function, |
| PrettyFunction |
| }; |
| |
| private: |
| SourceLocation Loc; |
| IdentType Type; |
| public: |
| PredefinedExpr(SourceLocation l, QualType type, IdentType IT) |
| : Expr(PredefinedExprClass, type, type->isDependentType(), |
| type->isDependentType()), Loc(l), Type(IT) {} |
| |
| /// \brief Construct an empty predefined expression. |
| explicit PredefinedExpr(EmptyShell Empty) |
| : Expr(PredefinedExprClass, Empty) { } |
| |
| IdentType getIdentType() const { return Type; } |
| void setIdentType(IdentType IT) { Type = IT; } |
| |
| SourceLocation getLocation() const { return Loc; } |
| void setLocation(SourceLocation L) { Loc = L; } |
| |
| static std::string ComputeName(ASTContext &Context, IdentType IT, |
| const Decl *CurrentDecl); |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == PredefinedExprClass; |
| } |
| static bool classof(const PredefinedExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| class IntegerLiteral : public Expr { |
| llvm::APInt Value; |
| SourceLocation Loc; |
| public: |
| // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, |
| // or UnsignedLongLongTy |
| IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) |
| : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { |
| assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); |
| } |
| |
| /// \brief Construct an empty integer literal. |
| explicit IntegerLiteral(EmptyShell Empty) |
| : Expr(IntegerLiteralClass, Empty) { } |
| |
| const llvm::APInt &getValue() const { return Value; } |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| /// \brief Retrieve the location of the literal. |
| SourceLocation getLocation() const { return Loc; } |
| |
| void setValue(const llvm::APInt &Val) { Value = Val; } |
| void setLocation(SourceLocation Location) { Loc = Location; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == IntegerLiteralClass; |
| } |
| static bool classof(const IntegerLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| class CharacterLiteral : public Expr { |
| unsigned Value; |
| SourceLocation Loc; |
| bool IsWide; |
| public: |
| // type should be IntTy |
| CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) |
| : Expr(CharacterLiteralClass, type), Value(value), Loc(l), IsWide(iswide) { |
| } |
| |
| /// \brief Construct an empty character literal. |
| CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } |
| |
| SourceLocation getLocation() const { return Loc; } |
| bool isWide() const { return IsWide; } |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| unsigned getValue() const { return Value; } |
| |
| void setLocation(SourceLocation Location) { Loc = Location; } |
| void setWide(bool W) { IsWide = W; } |
| void setValue(unsigned Val) { Value = Val; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CharacterLiteralClass; |
| } |
| static bool classof(const CharacterLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| class FloatingLiteral : public Expr { |
| llvm::APFloat Value; |
| bool IsExact : 1; |
| SourceLocation Loc; |
| public: |
| FloatingLiteral(const llvm::APFloat &V, bool isexact, |
| QualType Type, SourceLocation L) |
| : Expr(FloatingLiteralClass, Type), Value(V), IsExact(isexact), Loc(L) {} |
| |
| /// \brief Construct an empty floating-point literal. |
| explicit FloatingLiteral(EmptyShell Empty) |
| : Expr(FloatingLiteralClass, Empty), Value(0.0) { } |
| |
| const llvm::APFloat &getValue() const { return Value; } |
| void setValue(const llvm::APFloat &Val) { Value = Val; } |
| |
| bool isExact() const { return IsExact; } |
| void setExact(bool E) { IsExact = E; } |
| |
| /// getValueAsApproximateDouble - This returns the value as an inaccurate |
| /// double. Note that this may cause loss of precision, but is useful for |
| /// debugging dumps, etc. |
| double getValueAsApproximateDouble() const; |
| |
| SourceLocation getLocation() const { return Loc; } |
| void setLocation(SourceLocation L) { Loc = L; } |
| |
| // FIXME: The logic for computing the value of a predefined expr should go |
| // into a method here that takes the inner-most code decl (a block, function |
| // or objc method) that the expr lives in. This would allow sema and codegen |
| // to be consistent for things like sizeof(__func__) etc. |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == FloatingLiteralClass; |
| } |
| static bool classof(const FloatingLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ImaginaryLiteral - We support imaginary integer and floating point literals, |
| /// like "1.0i". We represent these as a wrapper around FloatingLiteral and |
| /// IntegerLiteral classes. Instances of this class always have a Complex type |
| /// whose element type matches the subexpression. |
| /// |
| class ImaginaryLiteral : public Expr { |
| Stmt *Val; |
| public: |
| ImaginaryLiteral(Expr *val, QualType Ty) |
| : Expr(ImaginaryLiteralClass, Ty), Val(val) {} |
| |
| /// \brief Build an empty imaginary literal. |
| explicit ImaginaryLiteral(EmptyShell Empty) |
| : Expr(ImaginaryLiteralClass, Empty) { } |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| void setSubExpr(Expr *E) { Val = E; } |
| |
| virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ImaginaryLiteralClass; |
| } |
| static bool classof(const ImaginaryLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// StringLiteral - This represents a string literal expression, e.g. "foo" |
| /// or L"bar" (wide strings). The actual string is returned by getStrData() |
| /// is NOT null-terminated, and the length of the string is determined by |
| /// calling getByteLength(). The C type for a string is always a |
| /// ConstantArrayType. In C++, the char type is const qualified, in C it is |
| /// not. |
| /// |
| /// Note that strings in C can be formed by concatenation of multiple string |
| /// literal pptokens in translation phase #6. This keeps track of the locations |
| /// of each of these pieces. |
| /// |
| /// Strings in C can also be truncated and extended by assigning into arrays, |
| /// e.g. with constructs like: |
| /// char X[2] = "foobar"; |
| /// In this case, getByteLength() will return 6, but the string literal will |
| /// have type "char[2]". |
| class StringLiteral : public Expr { |
| const char *StrData; |
| unsigned ByteLength; |
| bool IsWide; |
| unsigned NumConcatenated; |
| SourceLocation TokLocs[1]; |
| |
| StringLiteral(QualType Ty) : Expr(StringLiteralClass, Ty) {} |
| |
| protected: |
| virtual void DoDestroy(ASTContext &C); |
| |
| public: |
| /// This is the "fully general" constructor that allows representation of |
| /// strings formed from multiple concatenated tokens. |
| static StringLiteral *Create(ASTContext &C, const char *StrData, |
| unsigned ByteLength, bool Wide, QualType Ty, |
| const SourceLocation *Loc, unsigned NumStrs); |
| |
| /// Simple constructor for string literals made from one token. |
| static StringLiteral *Create(ASTContext &C, const char *StrData, |
| unsigned ByteLength, |
| bool Wide, QualType Ty, SourceLocation Loc) { |
| return Create(C, StrData, ByteLength, Wide, Ty, &Loc, 1); |
| } |
| |
| /// \brief Construct an empty string literal. |
| static StringLiteral *CreateEmpty(ASTContext &C, unsigned NumStrs); |
| |
| const char *getStrData() const { return StrData; } |
| unsigned getByteLength() const { return ByteLength; } |
| |
| /// \brief Sets the string data to the given string data. |
| void setStrData(ASTContext &C, const char *Str, unsigned Len); |
| |
| bool isWide() const { return IsWide; } |
| void setWide(bool W) { IsWide = W; } |
| |
| bool containsNonAsciiOrNull() const { |
| for (unsigned i = 0; i < getByteLength(); ++i) |
| if (!isascii(getStrData()[i]) || !getStrData()[i]) |
| return true; |
| return false; |
| } |
| /// getNumConcatenated - Get the number of string literal tokens that were |
| /// concatenated in translation phase #6 to form this string literal. |
| unsigned getNumConcatenated() const { return NumConcatenated; } |
| |
| SourceLocation getStrTokenLoc(unsigned TokNum) const { |
| assert(TokNum < NumConcatenated && "Invalid tok number"); |
| return TokLocs[TokNum]; |
| } |
| void setStrTokenLoc(unsigned TokNum, SourceLocation L) { |
| assert(TokNum < NumConcatenated && "Invalid tok number"); |
| TokLocs[TokNum] = L; |
| } |
| |
| typedef const SourceLocation *tokloc_iterator; |
| tokloc_iterator tokloc_begin() const { return TokLocs; } |
| tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == StringLiteralClass; |
| } |
| static bool classof(const StringLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ParenExpr - This represents a parethesized expression, e.g. "(1)". This |
| /// AST node is only formed if full location information is requested. |
| class ParenExpr : public Expr { |
| SourceLocation L, R; |
| Stmt *Val; |
| public: |
| ParenExpr(SourceLocation l, SourceLocation r, Expr *val) |
| : Expr(ParenExprClass, val->getType(), |
| val->isTypeDependent(), val->isValueDependent()), |
| L(l), R(r), Val(val) {} |
| |
| /// \brief Construct an empty parenthesized expression. |
| explicit ParenExpr(EmptyShell Empty) |
| : Expr(ParenExprClass, Empty) { } |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| void setSubExpr(Expr *E) { Val = E; } |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(L, R); } |
| |
| /// \brief Get the location of the left parentheses '('. |
| SourceLocation getLParen() const { return L; } |
| void setLParen(SourceLocation Loc) { L = Loc; } |
| |
| /// \brief Get the location of the right parentheses ')'. |
| SourceLocation getRParen() const { return R; } |
| void setRParen(SourceLocation Loc) { R = Loc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ParenExprClass; |
| } |
| static bool classof(const ParenExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| |
| /// UnaryOperator - This represents the unary-expression's (except sizeof and |
| /// alignof), the postinc/postdec operators from postfix-expression, and various |
| /// extensions. |
| /// |
| /// Notes on various nodes: |
| /// |
| /// Real/Imag - These return the real/imag part of a complex operand. If |
| /// applied to a non-complex value, the former returns its operand and the |
| /// later returns zero in the type of the operand. |
| /// |
| /// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose |
| /// subexpression is a compound literal with the various MemberExpr and |
| /// ArraySubscriptExpr's applied to it. |
| /// |
| class UnaryOperator : public Expr { |
| public: |
| // Note that additions to this should also update the StmtVisitor class. |
| enum Opcode { |
| PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators |
| PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. |
| AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. |
| Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. |
| Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. |
| Real, Imag, // "__real expr"/"__imag expr" Extension. |
| Extension, // __extension__ marker. |
| OffsetOf // __builtin_offsetof |
| }; |
| private: |
| Stmt *Val; |
| Opcode Opc; |
| SourceLocation Loc; |
| public: |
| |
| UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) |
| : Expr(UnaryOperatorClass, type, |
| input->isTypeDependent() && opc != OffsetOf, |
| input->isValueDependent()), |
| Val(input), Opc(opc), Loc(l) {} |
| |
| /// \brief Build an empty unary operator. |
| explicit UnaryOperator(EmptyShell Empty) |
| : Expr(UnaryOperatorClass, Empty), Opc(AddrOf) { } |
| |
| Opcode getOpcode() const { return Opc; } |
| void setOpcode(Opcode O) { Opc = O; } |
| |
| Expr *getSubExpr() const { return cast<Expr>(Val); } |
| void setSubExpr(Expr *E) { Val = E; } |
| |
| /// getOperatorLoc - Return the location of the operator. |
| SourceLocation getOperatorLoc() const { return Loc; } |
| void setOperatorLoc(SourceLocation L) { Loc = L; } |
| |
| /// isPostfix - Return true if this is a postfix operation, like x++. |
| static bool isPostfix(Opcode Op) { |
| return Op == PostInc || Op == PostDec; |
| } |
| |
| /// isPostfix - Return true if this is a prefix operation, like --x. |
| static bool isPrefix(Opcode Op) { |
| return Op == PreInc || Op == PreDec; |
| } |
| |
| bool isPrefix() const { return isPrefix(Opc); } |
| bool isPostfix() const { return isPostfix(Opc); } |
| bool isIncrementOp() const {return Opc==PreInc || Opc==PostInc; } |
| bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } |
| bool isOffsetOfOp() const { return Opc == OffsetOf; } |
| static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } |
| bool isArithmeticOp() const { return isArithmeticOp(Opc); } |
| |
| /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| /// corresponds to, e.g. "sizeof" or "[pre]++" |
| static const char *getOpcodeStr(Opcode Op); |
| |
| /// \brief Retrieve the unary opcode that corresponds to the given |
| /// overloaded operator. |
| static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); |
| |
| /// \brief Retrieve the overloaded operator kind that corresponds to |
| /// the given unary opcode. |
| static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); |
| |
| virtual SourceRange getSourceRange() const { |
| if (isPostfix()) |
| return SourceRange(Val->getLocStart(), Loc); |
| else |
| return SourceRange(Loc, Val->getLocEnd()); |
| } |
| virtual SourceLocation getExprLoc() const { return Loc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == UnaryOperatorClass; |
| } |
| static bool classof(const UnaryOperator *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// SizeOfAlignOfExpr - [C99 6.5.3.4] - This is for sizeof/alignof, both of |
| /// types and expressions. |
| class SizeOfAlignOfExpr : public Expr { |
| bool isSizeof : 1; // true if sizeof, false if alignof. |
| bool isType : 1; // true if operand is a type, false if an expression |
| union { |
| void *Ty; |
| Stmt *Ex; |
| } Argument; |
| SourceLocation OpLoc, RParenLoc; |
| |
| protected: |
| virtual void DoDestroy(ASTContext& C); |
| |
| public: |
| SizeOfAlignOfExpr(bool issizeof, QualType T, |
| QualType resultType, SourceLocation op, |
| SourceLocation rp) : |
| Expr(SizeOfAlignOfExprClass, resultType, |
| false, // Never type-dependent (C++ [temp.dep.expr]p3). |
| // Value-dependent if the argument is type-dependent. |
| T->isDependentType()), |
| isSizeof(issizeof), isType(true), OpLoc(op), RParenLoc(rp) { |
| Argument.Ty = T.getAsOpaquePtr(); |
| } |
| |
| SizeOfAlignOfExpr(bool issizeof, Expr *E, |
| QualType resultType, SourceLocation op, |
| SourceLocation rp) : |
| Expr(SizeOfAlignOfExprClass, resultType, |
| false, // Never type-dependent (C++ [temp.dep.expr]p3). |
| // Value-dependent if the argument is type-dependent. |
| E->isTypeDependent()), |
| isSizeof(issizeof), isType(false), OpLoc(op), RParenLoc(rp) { |
| Argument.Ex = E; |
| } |
| |
| /// \brief Construct an empty sizeof/alignof expression. |
| explicit SizeOfAlignOfExpr(EmptyShell Empty) |
| : Expr(SizeOfAlignOfExprClass, Empty) { } |
| |
| bool isSizeOf() const { return isSizeof; } |
| void setSizeof(bool S) { isSizeof = S; } |
| |
| bool isArgumentType() const { return isType; } |
| QualType getArgumentType() const { |
| assert(isArgumentType() && "calling getArgumentType() when arg is expr"); |
| return QualType::getFromOpaquePtr(Argument.Ty); |
| } |
| Expr *getArgumentExpr() { |
| assert(!isArgumentType() && "calling getArgumentExpr() when arg is type"); |
| return static_cast<Expr*>(Argument.Ex); |
| } |
| const Expr *getArgumentExpr() const { |
| return const_cast<SizeOfAlignOfExpr*>(this)->getArgumentExpr(); |
| } |
| |
| void setArgument(Expr *E) { Argument.Ex = E; isType = false; } |
| void setArgument(QualType T) { |
| Argument.Ty = T.getAsOpaquePtr(); |
| isType = true; |
| } |
| |
| /// Gets the argument type, or the type of the argument expression, whichever |
| /// is appropriate. |
| QualType getTypeOfArgument() const { |
| return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); |
| } |
| |
| SourceLocation getOperatorLoc() const { return OpLoc; } |
| void setOperatorLoc(SourceLocation L) { OpLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(OpLoc, RParenLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == SizeOfAlignOfExprClass; |
| } |
| static bool classof(const SizeOfAlignOfExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Postfix Operators. |
| //===----------------------------------------------------------------------===// |
| |
| /// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. |
| class ArraySubscriptExpr : public Expr { |
| enum { LHS, RHS, END_EXPR=2 }; |
| Stmt* SubExprs[END_EXPR]; |
| SourceLocation RBracketLoc; |
| public: |
| ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, |
| SourceLocation rbracketloc) |
| : Expr(ArraySubscriptExprClass, t, |
| lhs->isTypeDependent() || rhs->isTypeDependent(), |
| lhs->isValueDependent() || rhs->isValueDependent()), |
| RBracketLoc(rbracketloc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| /// \brief Create an empty array subscript expression. |
| explicit ArraySubscriptExpr(EmptyShell Shell) |
| : Expr(ArraySubscriptExprClass, Shell) { } |
| |
| /// An array access can be written A[4] or 4[A] (both are equivalent). |
| /// - getBase() and getIdx() always present the normalized view: A[4]. |
| /// In this case getBase() returns "A" and getIdx() returns "4". |
| /// - getLHS() and getRHS() present the syntactic view. e.g. for |
| /// 4[A] getLHS() returns "4". |
| /// Note: Because vector element access is also written A[4] we must |
| /// predicate the format conversion in getBase and getIdx only on the |
| /// the type of the RHS, as it is possible for the LHS to be a vector of |
| /// integer type |
| Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } |
| const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| void setLHS(Expr *E) { SubExprs[LHS] = E; } |
| |
| Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } |
| const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| void setRHS(Expr *E) { SubExprs[RHS] = E; } |
| |
| Expr *getBase() { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); |
| } |
| |
| const Expr *getBase() const { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); |
| } |
| |
| Expr *getIdx() { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); |
| } |
| |
| const Expr *getIdx() const { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); |
| } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getLHS()->getLocStart(), RBracketLoc); |
| } |
| |
| SourceLocation getRBracketLoc() const { return RBracketLoc; } |
| void setRBracketLoc(SourceLocation L) { RBracketLoc = L; } |
| |
| virtual SourceLocation getExprLoc() const { return getBase()->getExprLoc(); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ArraySubscriptExprClass; |
| } |
| static bool classof(const ArraySubscriptExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| |
| /// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). |
| /// CallExpr itself represents a normal function call, e.g., "f(x, 2)", |
| /// while its subclasses may represent alternative syntax that (semantically) |
| /// results in a function call. For example, CXXOperatorCallExpr is |
| /// a subclass for overloaded operator calls that use operator syntax, e.g., |
| /// "str1 + str2" to resolve to a function call. |
| class CallExpr : public Expr { |
| enum { FN=0, ARGS_START=1 }; |
| Stmt **SubExprs; |
| unsigned NumArgs; |
| SourceLocation RParenLoc; |
| |
| protected: |
| // This version of the constructor is for derived classes. |
| CallExpr(ASTContext& C, StmtClass SC, Expr *fn, Expr **args, unsigned numargs, |
| QualType t, SourceLocation rparenloc); |
| |
| virtual void DoDestroy(ASTContext& C); |
| |
| public: |
| CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs, QualType t, |
| SourceLocation rparenloc); |
| |
| /// \brief Build an empty call expression. |
| CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty); |
| |
| ~CallExpr() {} |
| |
| const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } |
| Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } |
| void setCallee(Expr *F) { SubExprs[FN] = F; } |
| |
| /// \brief If the callee is a FunctionDecl, return it. Otherwise return 0. |
| FunctionDecl *getDirectCallee(); |
| |
| /// getNumArgs - Return the number of actual arguments to this call. |
| /// |
| unsigned getNumArgs() const { return NumArgs; } |
| |
| /// getArg - Return the specified argument. |
| Expr *getArg(unsigned Arg) { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Arg+ARGS_START]); |
| } |
| const Expr *getArg(unsigned Arg) const { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Arg+ARGS_START]); |
| } |
| |
| /// setArg - Set the specified argument. |
| void setArg(unsigned Arg, Expr *ArgExpr) { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| SubExprs[Arg+ARGS_START] = ArgExpr; |
| } |
| |
| /// setNumArgs - This changes the number of arguments present in this call. |
| /// Any orphaned expressions are deleted by this, and any new operands are set |
| /// to null. |
| void setNumArgs(ASTContext& C, unsigned NumArgs); |
| |
| typedef ExprIterator arg_iterator; |
| typedef ConstExprIterator const_arg_iterator; |
| |
| arg_iterator arg_begin() { return SubExprs+ARGS_START; } |
| arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } |
| const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } |
| const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} |
| |
| /// getNumCommas - Return the number of commas that must have been present in |
| /// this function call. |
| unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } |
| |
| /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If |
| /// not, return 0. |
| unsigned isBuiltinCall(ASTContext &Context) const; |
| |
| /// getCallReturnType - Get the return type of the call expr. This is not |
| /// always the type of the expr itself, if the return type is a reference |
| /// type. |
| QualType getCallReturnType() const; |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCallee()->getLocStart(), RParenLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CallExprClass || |
| T->getStmtClass() == CXXOperatorCallExprClass || |
| T->getStmtClass() == CXXMemberCallExprClass; |
| } |
| static bool classof(const CallExpr *) { return true; } |
| static bool classof(const CXXOperatorCallExpr *) { return true; } |
| static bool classof(const CXXMemberCallExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// \brief Represents the qualifier that may precede a C++ name, e.g., the |
| /// "std::" in "std::sort". |
| struct NameQualifier { |
| /// \brief The nested name specifier. |
| NestedNameSpecifier *NNS; |
| |
| /// \brief The source range covered by the nested name specifier. |
| SourceRange Range; |
| }; |
| |
| /// \brief Represents an explicit template argument list in C++, e.g., |
| /// the "<int>" in "sort<int>". |
| struct ExplicitTemplateArgumentList { |
| /// \brief The source location of the left angle bracket ('<'); |
| SourceLocation LAngleLoc; |
| |
| /// \brief The source location of the right angle bracket ('>'); |
| SourceLocation RAngleLoc; |
| |
| /// \brief The number of template arguments in TemplateArgs. |
| /// The actual template arguments (if any) are stored after the |
| /// ExplicitTemplateArgumentList structure. |
| unsigned NumTemplateArgs; |
| |
| /// \brief Retrieve the template arguments |
| TemplateArgument *getTemplateArgs() { |
| return reinterpret_cast<TemplateArgument *> (this + 1); |
| } |
| |
| /// \brief Retrieve the template arguments |
| const TemplateArgument *getTemplateArgs() const { |
| return reinterpret_cast<const TemplateArgument *> (this + 1); |
| } |
| }; |
| |
| /// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. |
| /// |
| class MemberExpr : public Expr { |
| /// Base - the expression for the base pointer or structure references. In |
| /// X.F, this is "X". |
| Stmt *Base; |
| |
| /// MemberDecl - This is the decl being referenced by the field/member name. |
| /// In X.F, this is the decl referenced by F. |
| NamedDecl *MemberDecl; |
| |
| /// MemberLoc - This is the location of the member name. |
| SourceLocation MemberLoc; |
| |
| /// IsArrow - True if this is "X->F", false if this is "X.F". |
| bool IsArrow : 1; |
| |
| /// \brief True if this member expression used a nested-name-specifier to |
| /// refer to the member, e.g., "x->Base::f". When true, a NameQualifier |
| /// structure is allocated immediately after the MemberExpr. |
| bool HasQualifier : 1; |
| |
| /// \brief True if this member expression specified a template argument list |
| /// explicitly, e.g., x->f<int>. When true, an ExplicitTemplateArgumentList |
| /// structure (and its TemplateArguments) are allocated immediately after |
| /// the MemberExpr or, if the member expression also has a qualifier, after |
| /// the NameQualifier structure. |
| bool HasExplicitTemplateArgumentList : 1; |
| |
| /// \brief Retrieve the qualifier that preceded the member name, if any. |
| NameQualifier *getMemberQualifier() { |
| if (!HasQualifier) |
| return 0; |
| |
| return reinterpret_cast<NameQualifier *> (this + 1); |
| } |
| |
| /// \brief Retrieve the qualifier that preceded the member name, if any. |
| const NameQualifier *getMemberQualifier() const { |
| return const_cast<MemberExpr *>(this)->getMemberQualifier(); |
| } |
| |
| /// \brief Retrieve the explicit template argument list that followed the |
| /// member template name, if any. |
| ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() { |
| if (!HasExplicitTemplateArgumentList) |
| return 0; |
| |
| if (!HasQualifier) |
| return reinterpret_cast<ExplicitTemplateArgumentList *>(this + 1); |
| |
| return reinterpret_cast<ExplicitTemplateArgumentList *>( |
| getMemberQualifier() + 1); |
| } |
| |
| /// \brief Retrieve the explicit template argument list that followed the |
| /// member template name, if any. |
| const ExplicitTemplateArgumentList *getExplicitTemplateArgumentList() const { |
| return const_cast<MemberExpr *>(this)->getExplicitTemplateArgumentList(); |
| } |
| |
| MemberExpr(Expr *base, bool isarrow, NestedNameSpecifier *qual, |
| SourceRange qualrange, NamedDecl *memberdecl, SourceLocation l, |
| bool has_explicit, SourceLocation langle, |
| const TemplateArgument *targs, unsigned numtargs, |
| SourceLocation rangle, QualType ty); |
| |
| public: |
| MemberExpr(Expr *base, bool isarrow, NamedDecl *memberdecl, SourceLocation l, |
| QualType ty) |
| : Expr(MemberExprClass, ty, |
| base->isTypeDependent(), base->isValueDependent()), |
| Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow), |
| HasQualifier(false), HasExplicitTemplateArgumentList(false) {} |
| |
| /// \brief Build an empty member reference expression. |
| explicit MemberExpr(EmptyShell Empty) |
| : Expr(MemberExprClass, Empty), HasQualifier(false), |
| HasExplicitTemplateArgumentList(false) { } |
| |
| static MemberExpr *Create(ASTContext &C, Expr *base, bool isarrow, |
| NestedNameSpecifier *qual, SourceRange qualrange, |
| NamedDecl *memberdecl, |
| SourceLocation l, |
| bool has_explicit, |
| SourceLocation langle, |
| const TemplateArgument *targs, |
| unsigned numtargs, |
| SourceLocation rangle, |
| QualType ty); |
| |
| void setBase(Expr *E) { Base = E; } |
| Expr *getBase() const { return cast<Expr>(Base); } |
| |
| /// \brief Retrieve the member declaration to which this expression refers. |
| /// |
| /// The returned declaration will either be a FieldDecl or (in C++) |
| /// a CXXMethodDecl. |
| NamedDecl *getMemberDecl() const { return MemberDecl; } |
| void setMemberDecl(NamedDecl *D) { MemberDecl = D; } |
| |
| /// \brief Determines whether this member expression actually had |
| /// a C++ nested-name-specifier prior to the name of the member, e.g., |
| /// x->Base::foo. |
| bool hasQualifier() const { return HasQualifier; } |
| |
| /// \brief If the member name was qualified, retrieves the source range of |
| /// the nested-name-specifier that precedes the member name. Otherwise, |
| /// returns an empty source range. |
| SourceRange getQualifierRange() const { |
| if (!HasQualifier) |
| return SourceRange(); |
| |
| return getMemberQualifier()->Range; |
| } |
| |
| /// \brief If the member name was qualified, retrieves the |
| /// nested-name-specifier that precedes the member name. Otherwise, returns |
| /// NULL. |
| NestedNameSpecifier *getQualifier() const { |
| if (!HasQualifier) |
| return 0; |
| |
| return getMemberQualifier()->NNS; |
| } |
| |
| /// \brief Determines whether this member expression actually had a C++ |
| /// template argument list explicitly specified, e.g., x.f<int>. |
| bool hasExplicitTemplateArgumentList() { |
| return HasExplicitTemplateArgumentList; |
| } |
| |
| /// \brief Retrieve the location of the left angle bracket following the |
| /// member name ('<'), if any. |
| SourceLocation getLAngleLoc() const { |
| if (!HasExplicitTemplateArgumentList) |
| return SourceLocation(); |
| |
| return getExplicitTemplateArgumentList()->LAngleLoc; |
| } |
| |
| /// \brief Retrieve the template arguments provided as part of this |
| /// template-id. |
| const TemplateArgument *getTemplateArgs() const { |
| if (!HasExplicitTemplateArgumentList) |
| return 0; |
| |
| return getExplicitTemplateArgumentList()->getTemplateArgs(); |
| } |
| |
| /// \brief Retrieve the number of template arguments provided as part of this |
| /// template-id. |
| unsigned getNumTemplateArgs() const { |
| if (!HasExplicitTemplateArgumentList) |
| return 0; |
| |
| return getExplicitTemplateArgumentList()->NumTemplateArgs; |
| } |
| |
| /// \brief Retrieve the location of the right angle bracket following the |
| /// template arguments ('>'). |
| SourceLocation getRAngleLoc() const { |
| if (!HasExplicitTemplateArgumentList) |
| return SourceLocation(); |
| |
| return getExplicitTemplateArgumentList()->RAngleLoc; |
| } |
| |
| bool isArrow() const { return IsArrow; } |
| void setArrow(bool A) { IsArrow = A; } |
| |
| /// getMemberLoc - Return the location of the "member", in X->F, it is the |
| /// location of 'F'. |
| SourceLocation getMemberLoc() const { return MemberLoc; } |
| void setMemberLoc(SourceLocation L) { MemberLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| // If we have an implicit base (like a C++ implicit this), |
| // make sure not to return its location |
| SourceLocation EndLoc = MemberLoc; |
| if (HasExplicitTemplateArgumentList) |
| EndLoc = getRAngleLoc(); |
| |
| SourceLocation BaseLoc = getBase()->getLocStart(); |
| if (BaseLoc.isInvalid()) |
| return SourceRange(MemberLoc, EndLoc); |
| return SourceRange(BaseLoc, EndLoc); |
| } |
| |
| virtual SourceLocation getExprLoc() const { return MemberLoc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == MemberExprClass; |
| } |
| static bool classof(const MemberExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// CompoundLiteralExpr - [C99 6.5.2.5] |
| /// |
| class CompoundLiteralExpr : public Expr { |
| /// LParenLoc - If non-null, this is the location of the left paren in a |
| /// compound literal like "(int){4}". This can be null if this is a |
| /// synthesized compound expression. |
| SourceLocation LParenLoc; |
| Stmt *Init; |
| bool FileScope; |
| public: |
| CompoundLiteralExpr(SourceLocation lparenloc, QualType ty, Expr *init, |
| bool fileScope) |
| : Expr(CompoundLiteralExprClass, ty), LParenLoc(lparenloc), Init(init), |
| FileScope(fileScope) {} |
| |
| /// \brief Construct an empty compound literal. |
| explicit CompoundLiteralExpr(EmptyShell Empty) |
| : Expr(CompoundLiteralExprClass, Empty) { } |
| |
| const Expr *getInitializer() const { return cast<Expr>(Init); } |
| Expr *getInitializer() { return cast<Expr>(Init); } |
| void setInitializer(Expr *E) { Init = E; } |
| |
| bool isFileScope() const { return FileScope; } |
| void setFileScope(bool FS) { FileScope = FS; } |
| |
| SourceLocation getLParenLoc() const { return LParenLoc; } |
| void setLParenLoc(SourceLocation L) { LParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| // FIXME: Init should never be null. |
| if (!Init) |
| return SourceRange(); |
| if (LParenLoc.isInvalid()) |
| return Init->getSourceRange(); |
| return SourceRange(LParenLoc, Init->getLocEnd()); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CompoundLiteralExprClass; |
| } |
| static bool classof(const CompoundLiteralExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// CastExpr - Base class for type casts, including both implicit |
| /// casts (ImplicitCastExpr) and explicit casts that have some |
| /// representation in the source code (ExplicitCastExpr's derived |
| /// classes). |
| class CastExpr : public Expr { |
| public: |
| /// CastKind - the kind of cast this represents. |
| enum CastKind { |
| /// CK_Unknown - Unknown cast kind. |
| /// FIXME: The goal is to get rid of this and make all casts have a |
| /// kind so that the AST client doesn't have to try to figure out what's |
| /// going on. |
| CK_Unknown, |
| |
| /// CK_BitCast - Used for reinterpret_cast. |
| CK_BitCast, |
| |
| /// CK_NoOp - Used for const_cast. |
| CK_NoOp, |
| |
| /// CK_DerivedToBase - Derived to base class casts. |
| CK_DerivedToBase, |
| |
| /// CK_Dynamic - Dynamic cast. |
| CK_Dynamic, |
| |
| /// CK_ToUnion - Cast to union (GCC extension). |
| CK_ToUnion, |
| |
| /// CK_ArrayToPointerDecay - Array to pointer decay. |
| CK_ArrayToPointerDecay, |
| |
| // CK_FunctionToPointerDecay - Function to pointer decay. |
| CK_FunctionToPointerDecay, |
| |
| /// CK_NullToMemberPointer - Null pointer to member pointer. |
| CK_NullToMemberPointer, |
| |
| /// CK_BaseToDerivedMemberPointer - Member pointer in base class to |
| /// member pointer in derived class. |
| CK_BaseToDerivedMemberPointer, |
| |
| /// CK_UserDefinedConversion - Conversion using a user defined type |
| /// conversion function. |
| CK_UserDefinedConversion, |
| |
| /// CK_ConstructorConversion - Conversion by constructor |
| CK_ConstructorConversion |
| }; |
| |
| struct CastInfo { |
| const CastKind Kind; |
| |
| // FIXME: This should assert that the CastKind does not require extra |
| // information. |
| CastInfo(CastKind Kind) |
| : Kind(Kind) { } |
| }; |
| |
| private: |
| CastKind Kind; |
| Stmt *Op; |
| protected: |
| CastExpr(StmtClass SC, QualType ty, const CastInfo &info, Expr *op) : |
| Expr(SC, ty, |
| // Cast expressions are type-dependent if the type is |
| // dependent (C++ [temp.dep.expr]p3). |
| ty->isDependentType(), |
| // Cast expressions are value-dependent if the type is |
| // dependent or if the subexpression is value-dependent. |
| ty->isDependentType() || (op && op->isValueDependent())), |
| Kind(info.Kind), Op(op) {} |
| |
| /// \brief Construct an empty cast. |
| CastExpr(StmtClass SC, EmptyShell Empty) |
| : Expr(SC, Empty) { } |
| |
| public: |
| CastKind getCastKind() const { return Kind; } |
| void setCastKind(CastKind K) { Kind = K; } |
| const char *getCastKindName() const; |
| |
| Expr *getSubExpr() { return cast<Expr>(Op); } |
| const Expr *getSubExpr() const { return cast<Expr>(Op); } |
| void setSubExpr(Expr *E) { Op = E; } |
| |
| static bool classof(const Stmt *T) { |
| StmtClass SC = T->getStmtClass(); |
| if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) |
| return true; |
| |
| if (SC >= ImplicitCastExprClass && SC <= CStyleCastExprClass) |
| return true; |
| |
| return false; |
| } |
| static bool classof(const CastExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ImplicitCastExpr - Allows us to explicitly represent implicit type |
| /// conversions, which have no direct representation in the original |
| /// source code. For example: converting T[]->T*, void f()->void |
| /// (*f)(), float->double, short->int, etc. |
| /// |
| /// In C, implicit casts always produce rvalues. However, in C++, an |
| /// implicit cast whose result is being bound to a reference will be |
| /// an lvalue. For example: |
| /// |
| /// @code |
| /// class Base { }; |
| /// class Derived : public Base { }; |
| /// void f(Derived d) { |
| /// Base& b = d; // initializer is an ImplicitCastExpr to an lvalue of type Base |
| /// } |
| /// @endcode |
| class ImplicitCastExpr : public CastExpr { |
| /// LvalueCast - Whether this cast produces an lvalue. |
| bool LvalueCast; |
| |
| public: |
| ImplicitCastExpr(QualType ty, const CastInfo &info, Expr *op, bool Lvalue) : |
| CastExpr(ImplicitCastExprClass, ty, info, op), LvalueCast(Lvalue) { } |
| |
| /// \brief Construct an empty implicit cast. |
| explicit ImplicitCastExpr(EmptyShell Shell) |
| : CastExpr(ImplicitCastExprClass, Shell) { } |
| |
| |
| virtual SourceRange getSourceRange() const { |
| return getSubExpr()->getSourceRange(); |
| } |
| |
| /// isLvalueCast - Whether this cast produces an lvalue. |
| bool isLvalueCast() const { return LvalueCast; } |
| |
| /// setLvalueCast - Set whether this cast produces an lvalue. |
| void setLvalueCast(bool Lvalue) { LvalueCast = Lvalue; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ImplicitCastExprClass; |
| } |
| static bool classof(const ImplicitCastExpr *) { return true; } |
| }; |
| |
| /// ExplicitCastExpr - An explicit cast written in the source |
| /// code. |
| /// |
| /// This class is effectively an abstract class, because it provides |
| /// the basic representation of an explicitly-written cast without |
| /// specifying which kind of cast (C cast, functional cast, static |
| /// cast, etc.) was written; specific derived classes represent the |
| /// particular style of cast and its location information. |
| /// |
| /// Unlike implicit casts, explicit cast nodes have two different |
| /// types: the type that was written into the source code, and the |
| /// actual type of the expression as determined by semantic |
| /// analysis. These types may differ slightly. For example, in C++ one |
| /// can cast to a reference type, which indicates that the resulting |
| /// expression will be an lvalue. The reference type, however, will |
| /// not be used as the type of the expression. |
| class ExplicitCastExpr : public CastExpr { |
| /// TypeAsWritten - The type that this expression is casting to, as |
| /// written in the source code. |
| QualType TypeAsWritten; |
| |
| protected: |
| ExplicitCastExpr(StmtClass SC, QualType exprTy, const CastInfo &info, |
| Expr *op, QualType writtenTy) |
| : CastExpr(SC, exprTy, info, op), TypeAsWritten(writtenTy) {} |
| |
| /// \brief Construct an empty explicit cast. |
| ExplicitCastExpr(StmtClass SC, EmptyShell Shell) |
| : CastExpr(SC, Shell) { } |
| |
| public: |
| /// getTypeAsWritten - Returns the type that this expression is |
| /// casting to, as written in the source code. |
| QualType getTypeAsWritten() const { return TypeAsWritten; } |
| void setTypeAsWritten(QualType T) { TypeAsWritten = T; } |
| |
| static bool classof(const Stmt *T) { |
| StmtClass SC = T->getStmtClass(); |
| if (SC >= ExplicitCastExprClass && SC <= CStyleCastExprClass) |
| return true; |
| if (SC >= CXXNamedCastExprClass && SC <= CXXFunctionalCastExprClass) |
| return true; |
| |
| return false; |
| } |
| static bool classof(const ExplicitCastExpr *) { return true; } |
| }; |
| |
| /// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style |
| /// cast in C++ (C++ [expr.cast]), which uses the syntax |
| /// (Type)expr. For example: @c (int)f. |
| class CStyleCastExpr : public ExplicitCastExpr { |
| SourceLocation LPLoc; // the location of the left paren |
| SourceLocation RPLoc; // the location of the right paren |
| public: |
| CStyleCastExpr(QualType exprTy, CastKind kind, Expr *op, QualType writtenTy, |
| SourceLocation l, SourceLocation r) : |
| ExplicitCastExpr(CStyleCastExprClass, exprTy, kind, op, writtenTy), |
| LPLoc(l), RPLoc(r) {} |
| |
| /// \brief Construct an empty C-style explicit cast. |
| explicit CStyleCastExpr(EmptyShell Shell) |
| : ExplicitCastExpr(CStyleCastExprClass, Shell) { } |
| |
| SourceLocation getLParenLoc() const { return LPLoc; } |
| void setLParenLoc(SourceLocation L) { LPLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RPLoc; } |
| void setRParenLoc(SourceLocation L) { RPLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd()); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CStyleCastExprClass; |
| } |
| static bool classof(const CStyleCastExpr *) { return true; } |
| }; |
| |
| /// \brief A builtin binary operation expression such as "x + y" or "x <= y". |
| /// |
| /// This expression node kind describes a builtin binary operation, |
| /// such as "x + y" for integer values "x" and "y". The operands will |
| /// already have been converted to appropriate types (e.g., by |
| /// performing promotions or conversions). |
| /// |
| /// In C++, where operators may be overloaded, a different kind of |
| /// expression node (CXXOperatorCallExpr) is used to express the |
| /// invocation of an overloaded operator with operator syntax. Within |
| /// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is |
| /// used to store an expression "x + y" depends on the subexpressions |
| /// for x and y. If neither x or y is type-dependent, and the "+" |
| /// operator resolves to a built-in operation, BinaryOperator will be |
| /// used to express the computation (x and y may still be |
| /// value-dependent). If either x or y is type-dependent, or if the |
| /// "+" resolves to an overloaded operator, CXXOperatorCallExpr will |
| /// be used to express the computation. |
| class BinaryOperator : public Expr { |
| public: |
| enum Opcode { |
| // Operators listed in order of precedence. |
| // Note that additions to this should also update the StmtVisitor class. |
| PtrMemD, PtrMemI, // [C++ 5.5] Pointer-to-member operators. |
| Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. |
| Add, Sub, // [C99 6.5.6] Additive operators. |
| Shl, Shr, // [C99 6.5.7] Bitwise shift operators. |
| LT, GT, LE, GE, // [C99 6.5.8] Relational operators. |
| EQ, NE, // [C99 6.5.9] Equality operators. |
| And, // [C99 6.5.10] Bitwise AND operator. |
| Xor, // [C99 6.5.11] Bitwise XOR operator. |
| Or, // [C99 6.5.12] Bitwise OR operator. |
| LAnd, // [C99 6.5.13] Logical AND operator. |
| LOr, // [C99 6.5.14] Logical OR operator. |
| Assign, MulAssign,// [C99 6.5.16] Assignment operators. |
| DivAssign, RemAssign, |
| AddAssign, SubAssign, |
| ShlAssign, ShrAssign, |
| AndAssign, XorAssign, |
| OrAssign, |
| Comma // [C99 6.5.17] Comma operator. |
| }; |
| private: |
| enum { LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; |
| Opcode Opc; |
| SourceLocation OpLoc; |
| public: |
| |
| BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, |
| SourceLocation opLoc) |
| : Expr(BinaryOperatorClass, ResTy, |
| lhs->isTypeDependent() || rhs->isTypeDependent(), |
| lhs->isValueDependent() || rhs->isValueDependent()), |
| Opc(opc), OpLoc(opLoc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| assert(!isCompoundAssignmentOp() && |
| "Use ArithAssignBinaryOperator for compound assignments"); |
| } |
| |
| /// \brief Construct an empty binary operator. |
| explicit BinaryOperator(EmptyShell Empty) |
| : Expr(BinaryOperatorClass, Empty), Opc(Comma) { } |
| |
| SourceLocation getOperatorLoc() const { return OpLoc; } |
| void setOperatorLoc(SourceLocation L) { OpLoc = L; } |
| |
| Opcode getOpcode() const { return Opc; } |
| void setOpcode(Opcode O) { Opc = O; } |
| |
| Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| void setLHS(Expr *E) { SubExprs[LHS] = E; } |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| void setRHS(Expr *E) { SubExprs[RHS] = E; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); |
| } |
| |
| /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| /// corresponds to, e.g. "<<=". |
| static const char *getOpcodeStr(Opcode Op); |
| |
| /// \brief Retrieve the binary opcode that corresponds to the given |
| /// overloaded operator. |
| static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); |
| |
| /// \brief Retrieve the overloaded operator kind that corresponds to |
| /// the given binary opcode. |
| static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); |
| |
| /// predicates to categorize the respective opcodes. |
| bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } |
| bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } |
| bool isShiftOp() const { return Opc == Shl || Opc == Shr; } |
| bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } |
| |
| static bool isRelationalOp(Opcode Opc) { return Opc >= LT && Opc <= GE; } |
| bool isRelationalOp() const { return isRelationalOp(Opc); } |
| |
| static bool isEqualityOp(Opcode Opc) { return Opc == EQ || Opc == NE; } |
| bool isEqualityOp() const { return isEqualityOp(Opc); } |
| |
| static bool isLogicalOp(Opcode Opc) { return Opc == LAnd || Opc == LOr; } |
| bool isLogicalOp() const { return isLogicalOp(Opc); } |
| |
| bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } |
| bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} |
| bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } |
| |
| static bool classof(const Stmt *S) { |
| return S->getStmtClass() == BinaryOperatorClass || |
| S->getStmtClass() == CompoundAssignOperatorClass; |
| } |
| static bool classof(const BinaryOperator *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| protected: |
| BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, |
| SourceLocation oploc, bool dead) |
| : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| BinaryOperator(StmtClass SC, EmptyShell Empty) |
| : Expr(SC, Empty), Opc(MulAssign) { } |
| }; |
| |
| /// CompoundAssignOperator - For compound assignments (e.g. +=), we keep |
| /// track of the type the operation is performed in. Due to the semantics of |
| /// these operators, the operands are promoted, the aritmetic performed, an |
| /// implicit conversion back to the result type done, then the assignment takes |
| /// place. This captures the intermediate type which the computation is done |
| /// in. |
| class CompoundAssignOperator : public BinaryOperator { |
| QualType ComputationLHSType; |
| QualType ComputationResultType; |
| public: |
| CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, |
| QualType ResType, QualType CompLHSType, |
| QualType CompResultType, |
| SourceLocation OpLoc) |
| : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), |
| ComputationLHSType(CompLHSType), |
| ComputationResultType(CompResultType) { |
| assert(isCompoundAssignmentOp() && |
| "Only should be used for compound assignments"); |
| } |
| |
| /// \brief Build an empty compound assignment operator expression. |
| explicit CompoundAssignOperator(EmptyShell Empty) |
| : BinaryOperator(CompoundAssignOperatorClass, Empty) { } |
| |
| // The two computation types are the type the LHS is converted |
| // to for the computation and the type of the result; the two are |
| // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). |
| QualType getComputationLHSType() const { return ComputationLHSType; } |
| void setComputationLHSType(QualType T) { ComputationLHSType = T; } |
| |
| QualType getComputationResultType() const { return ComputationResultType; } |
| void setComputationResultType(QualType T) { ComputationResultType = T; } |
| |
| static bool classof(const CompoundAssignOperator *) { return true; } |
| static bool classof(const Stmt *S) { |
| return S->getStmtClass() == CompoundAssignOperatorClass; |
| } |
| }; |
| |
| /// ConditionalOperator - The ?: operator. Note that LHS may be null when the |
| /// GNU "missing LHS" extension is in use. |
| /// |
| class ConditionalOperator : public Expr { |
| enum { COND, LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
| SourceLocation QuestionLoc, ColonLoc; |
| public: |
| ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, |
| SourceLocation CLoc, Expr *rhs, QualType t) |
| : Expr(ConditionalOperatorClass, t, |
| // FIXME: the type of the conditional operator doesn't |
| // depend on the type of the conditional, but the standard |
| // seems to imply that it could. File a bug! |
| ((lhs && lhs->isTypeDependent()) || (rhs && rhs->isTypeDependent())), |
| (cond->isValueDependent() || |
| (lhs && lhs->isValueDependent()) || |
| (rhs && rhs->isValueDependent()))), |
| QuestionLoc(QLoc), |
| ColonLoc(CLoc) { |
| SubExprs[COND] = cond; |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| /// \brief Build an empty conditional operator. |
| explicit ConditionalOperator(EmptyShell Empty) |
| : Expr(ConditionalOperatorClass, Empty) { } |
| |
| // getCond - Return the expression representing the condition for |
| // the ?: operator. |
| Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
| void setCond(Expr *E) { SubExprs[COND] = E; } |
| |
| // getTrueExpr - Return the subexpression representing the value of the ?: |
| // expression if the condition evaluates to true. In most cases this value |
| // will be the same as getLHS() except a GCC extension allows the left |
| // subexpression to be omitted, and instead of the condition be returned. |
| // e.g: x ?: y is shorthand for x ? x : y, except that the expression "x" |
| // is only evaluated once. |
| Expr *getTrueExpr() const { |
| return cast<Expr>(SubExprs[LHS] ? SubExprs[LHS] : SubExprs[COND]); |
| } |
| |
| // getTrueExpr - Return the subexpression representing the value of the ?: |
| // expression if the condition evaluates to false. This is the same as getRHS. |
| Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } |
| |
| Expr *getLHS() const { return cast_or_null<Expr>(SubExprs[LHS]); } |
| void setLHS(Expr *E) { SubExprs[LHS] = E; } |
| |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| void setRHS(Expr *E) { SubExprs[RHS] = E; } |
| |
| SourceLocation getQuestionLoc() const { return QuestionLoc; } |
| void setQuestionLoc(SourceLocation L) { QuestionLoc = L; } |
| |
| SourceLocation getColonLoc() const { return ColonLoc; } |
| void setColonLoc(SourceLocation L) { ColonLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ConditionalOperatorClass; |
| } |
| static bool classof(const ConditionalOperator *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// AddrLabelExpr - The GNU address of label extension, representing &&label. |
| class AddrLabelExpr : public Expr { |
| SourceLocation AmpAmpLoc, LabelLoc; |
| LabelStmt *Label; |
| public: |
| AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, |
| QualType t) |
| : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} |
| |
| /// \brief Build an empty address of a label expression. |
| explicit AddrLabelExpr(EmptyShell Empty) |
| : Expr(AddrLabelExprClass, Empty) { } |
| |
| SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } |
| void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } |
| SourceLocation getLabelLoc() const { return LabelLoc; } |
| void setLabelLoc(SourceLocation L) { LabelLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(AmpAmpLoc, LabelLoc); |
| } |
| |
| LabelStmt *getLabel() const { return Label; } |
| void setLabel(LabelStmt *S) { Label = S; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == AddrLabelExprClass; |
| } |
| static bool classof(const AddrLabelExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). |
| /// The StmtExpr contains a single CompoundStmt node, which it evaluates and |
| /// takes the value of the last subexpression. |
| class StmtExpr : public Expr { |
| Stmt *SubStmt; |
| SourceLocation LParenLoc, RParenLoc; |
| public: |
| StmtExpr(CompoundStmt *substmt, QualType T, |
| SourceLocation lp, SourceLocation rp) : |
| Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } |
| |
| /// \brief Build an empty statement expression. |
| explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } |
| |
| CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } |
| const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } |
| void setSubStmt(CompoundStmt *S) { SubStmt = S; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LParenLoc, RParenLoc); |
| } |
| |
| SourceLocation getLParenLoc() const { return LParenLoc; } |
| void setLParenLoc(SourceLocation L) { LParenLoc = L; } |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == StmtExprClass; |
| } |
| static bool classof(const StmtExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// TypesCompatibleExpr - GNU builtin-in function __builtin_types_compatible_p. |
| /// This AST node represents a function that returns 1 if two *types* (not |
| /// expressions) are compatible. The result of this built-in function can be |
| /// used in integer constant expressions. |
| class TypesCompatibleExpr : public Expr { |
| QualType Type1; |
| QualType Type2; |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, |
| QualType t1, QualType t2, SourceLocation RP) : |
| Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), |
| BuiltinLoc(BLoc), RParenLoc(RP) {} |
| |
| /// \brief Build an empty __builtin_type_compatible_p expression. |
| explicit TypesCompatibleExpr(EmptyShell Empty) |
| : Expr(TypesCompatibleExprClass, Empty) { } |
| |
| QualType getArgType1() const { return Type1; } |
| void setArgType1(QualType T) { Type1 = T; } |
| QualType getArgType2() const { return Type2; } |
| void setArgType2(QualType T) { Type2 = T; } |
| |
| SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
| void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == TypesCompatibleExprClass; |
| } |
| static bool classof(const TypesCompatibleExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ShuffleVectorExpr - clang-specific builtin-in function |
| /// __builtin_shufflevector. |
| /// This AST node represents a operator that does a constant |
| /// shuffle, similar to LLVM's shufflevector instruction. It takes |
| /// two vectors and a variable number of constant indices, |
| /// and returns the appropriately shuffled vector. |
| class ShuffleVectorExpr : public Expr { |
| SourceLocation BuiltinLoc, RParenLoc; |
| |
| // SubExprs - the list of values passed to the __builtin_shufflevector |
| // function. The first two are vectors, and the rest are constant |
| // indices. The number of values in this list is always |
| // 2+the number of indices in the vector type. |
| Stmt **SubExprs; |
| unsigned NumExprs; |
| |
| protected: |
| virtual void DoDestroy(ASTContext &C); |
| |
| public: |
| ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr, |
| QualType Type, SourceLocation BLoc, |
| SourceLocation RP) : |
| Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc), |
| RParenLoc(RP), NumExprs(nexpr) { |
| |
| SubExprs = new (C) Stmt*[nexpr]; |
| for (unsigned i = 0; i < nexpr; i++) |
| SubExprs[i] = args[i]; |
| } |
| |
| /// \brief Build an empty vector-shuffle expression. |
| explicit ShuffleVectorExpr(EmptyShell Empty) |
| : Expr(ShuffleVectorExprClass, Empty), SubExprs(0) { } |
| |
| SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
| void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ShuffleVectorExprClass; |
| } |
| static bool classof(const ShuffleVectorExpr *) { return true; } |
| |
| ~ShuffleVectorExpr() {} |
| |
| /// getNumSubExprs - Return the size of the SubExprs array. This includes the |
| /// constant expression, the actual arguments passed in, and the function |
| /// pointers. |
| unsigned getNumSubExprs() const { return NumExprs; } |
| |
| /// getExpr - Return the Expr at the specified index. |
| Expr *getExpr(unsigned Index) { |
| assert((Index < NumExprs) && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Index]); |
| } |
| const Expr *getExpr(unsigned Index) const { |
| assert((Index < NumExprs) && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Index]); |
| } |
| |
| void setExprs(ASTContext &C, Expr ** Exprs, unsigned NumExprs); |
| |
| unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { |
| assert((N < NumExprs - 2) && "Shuffle idx out of range!"); |
| return getExpr(N+2)->EvaluateAsInt(Ctx).getZExtValue(); |
| } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ChooseExpr - GNU builtin-in function __builtin_choose_expr. |
| /// This AST node is similar to the conditional operator (?:) in C, with |
| /// the following exceptions: |
| /// - the test expression must be a integer constant expression. |
| /// - the expression returned acts like the chosen subexpression in every |
| /// visible way: the type is the same as that of the chosen subexpression, |
| /// and all predicates (whether it's an l-value, whether it's an integer |
| /// constant expression, etc.) return the same result as for the chosen |
| /// sub-expression. |
| class ChooseExpr : public Expr { |
| enum { COND, LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, |
| SourceLocation RP) |
| : Expr(ChooseExprClass, t), |
| BuiltinLoc(BLoc), RParenLoc(RP) { |
| SubExprs[COND] = cond; |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| /// \brief Build an empty __builtin_choose_expr. |
| explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } |
| |
| /// isConditionTrue - Return whether the condition is true (i.e. not |
| /// equal to zero). |
| bool isConditionTrue(ASTContext &C) const; |
| |
| /// getChosenSubExpr - Return the subexpression chosen according to the |
| /// condition. |
| Expr *getChosenSubExpr(ASTContext &C) const { |
| return isConditionTrue(C) ? getLHS() : getRHS(); |
| } |
| |
| Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
| void setCond(Expr *E) { SubExprs[COND] = E; } |
| Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| void setLHS(Expr *E) { SubExprs[LHS] = E; } |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| void setRHS(Expr *E) { SubExprs[RHS] = E; } |
| |
| SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
| void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ChooseExprClass; |
| } |
| static bool classof(const ChooseExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// GNUNullExpr - Implements the GNU __null extension, which is a name |
| /// for a null pointer constant that has integral type (e.g., int or |
| /// long) and is the same size and alignment as a pointer. The __null |
| /// extension is typically only used by system headers, which define |
| /// NULL as __null in C++ rather than using 0 (which is an integer |
| /// that may not match the size of a pointer). |
| class GNUNullExpr : public Expr { |
| /// TokenLoc - The location of the __null keyword. |
| SourceLocation TokenLoc; |
| |
| public: |
| GNUNullExpr(QualType Ty, SourceLocation Loc) |
| : Expr(GNUNullExprClass, Ty), TokenLoc(Loc) { } |
| |
| /// \brief Build an empty GNU __null expression. |
| explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } |
| |
| /// getTokenLocation - The location of the __null token. |
| SourceLocation getTokenLocation() const { return TokenLoc; } |
| void setTokenLocation(SourceLocation L) { TokenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(TokenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == GNUNullExprClass; |
| } |
| static bool classof(const GNUNullExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// VAArgExpr, used for the builtin function __builtin_va_start. |
| class VAArgExpr : public Expr { |
| Stmt *Val; |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) |
| : Expr(VAArgExprClass, t), |
| Val(e), |
| BuiltinLoc(BLoc), |
| RParenLoc(RPLoc) { } |
| |
| /// \brief Create an empty __builtin_va_start expression. |
| explicit VAArgExpr(EmptyShell Empty) : Expr(VAArgExprClass, Empty) { } |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| void setSubExpr(Expr *E) { Val = E; } |
| |
| SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
| void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == VAArgExprClass; |
| } |
| static bool classof(const VAArgExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// @brief Describes an C or C++ initializer list. |
| /// |
| /// InitListExpr describes an initializer list, which can be used to |
| /// initialize objects of different types, including |
| /// struct/class/union types, arrays, and vectors. For example: |
| /// |
| /// @code |
| /// struct foo x = { 1, { 2, 3 } }; |
| /// @endcode |
| /// |
| /// Prior to semantic analysis, an initializer list will represent the |
| /// initializer list as written by the user, but will have the |
| /// placeholder type "void". This initializer list is called the |
| /// syntactic form of the initializer, and may contain C99 designated |
| /// initializers (represented as DesignatedInitExprs), initializations |
| /// of subobject members without explicit braces, and so on. Clients |
| /// interested in the original syntax of the initializer list should |
| /// use the syntactic form of the initializer list. |
| /// |
| /// After semantic analysis, the initializer list will represent the |
| /// semantic form of the initializer, where the initializations of all |
| /// subobjects are made explicit with nested InitListExpr nodes and |
| /// C99 designators have been eliminated by placing the designated |
| /// initializations into the subobject they initialize. Additionally, |
| /// any "holes" in the initialization, where no initializer has been |
| /// specified for a particular subobject, will be replaced with |
| /// implicitly-generated ImplicitValueInitExpr expressions that |
| /// value-initialize the subobjects. Note, however, that the |
| /// initializer lists may still have fewer initializers than there are |
| /// elements to initialize within the object. |
| /// |
| /// Given the semantic form of the initializer list, one can retrieve |
| /// the original syntactic form of that initializer list (if it |
| /// exists) using getSyntacticForm(). Since many initializer lists |
| /// have the same syntactic and semantic forms, getSyntacticForm() may |
| /// return NULL, indicating that the current initializer list also |
| /// serves as its syntactic form. |
| class InitListExpr : public Expr { |
| // FIXME: Eliminate this vector in favor of ASTContext allocation |
| std::vector<Stmt *> InitExprs; |
| SourceLocation LBraceLoc, RBraceLoc; |
| |
| /// Contains the initializer list that describes the syntactic form |
| /// written in the source code. |
| InitListExpr *SyntacticForm; |
| |
| /// If this initializer list initializes a union, specifies which |
| /// field within the union will be initialized. |
| FieldDecl *UnionFieldInit; |
| |
| /// Whether this initializer list originally had a GNU array-range |
| /// designator in it. This is a temporary marker used by CodeGen. |
| bool HadArrayRangeDesignator; |
| |
| public: |
| InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, |
| SourceLocation rbraceloc); |
| |
| /// \brief Build an empty initializer list. |
| explicit InitListExpr(EmptyShell Empty) : Expr(InitListExprClass, Empty) { } |
| |
| unsigned getNumInits() const { return InitExprs.size(); } |
| |
| const Expr* getInit(unsigned Init) const { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| return cast_or_null<Expr>(InitExprs[Init]); |
| } |
| |
| Expr* getInit(unsigned Init) { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| return cast_or_null<Expr>(InitExprs[Init]); |
| } |
| |
| void setInit(unsigned Init, Expr *expr) { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| InitExprs[Init] = expr; |
| } |
| |
| /// \brief Reserve space for some number of initializers. |
| void reserveInits(unsigned NumInits); |
| |
| /// @brief Specify the number of initializers |
| /// |
| /// If there are more than @p NumInits initializers, the remaining |
| /// initializers will be destroyed. If there are fewer than @p |
| /// NumInits initializers, NULL expressions will be added for the |
| /// unknown initializers. |
| void resizeInits(ASTContext &Context, unsigned NumInits); |
| |
| /// @brief Updates the initializer at index @p Init with the new |
| /// expression @p expr, and returns the old expression at that |
| /// location. |
| /// |
| /// When @p Init is out of range for this initializer list, the |
| /// initializer list will be extended with NULL expressions to |
| /// accomodate the new entry. |
| Expr *updateInit(unsigned Init, Expr *expr); |
| |
| /// \brief If this initializes a union, specifies which field in the |
| /// union to initialize. |
| /// |
| /// Typically, this field is the first named field within the |
| /// union. However, a designated initializer can specify the |
| /// initialization of a different field within the union. |
| FieldDecl *getInitializedFieldInUnion() { return UnionFieldInit; } |
| void setInitializedFieldInUnion(FieldDecl *FD) { UnionFieldInit = FD; } |
| |
| // Explicit InitListExpr's originate from source code (and have valid source |
| // locations). Implicit InitListExpr's are created by the semantic analyzer. |
| bool isExplicit() { |
| return LBraceLoc.isValid() && RBraceLoc.isValid(); |
| } |
| |
| SourceLocation getLBraceLoc() const { return LBraceLoc; } |
| void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } |
| SourceLocation getRBraceLoc() const { return RBraceLoc; } |
| void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } |
| |
| /// @brief Retrieve the initializer list that describes the |
| /// syntactic form of the initializer. |
| /// |
| /// |
| InitListExpr *getSyntacticForm() const { return SyntacticForm; } |
| void setSyntacticForm(InitListExpr *Init) { SyntacticForm = Init; } |
| |
| bool hadArrayRangeDesignator() const { return HadArrayRangeDesignator; } |
| void sawArrayRangeDesignator(bool ARD = true) { |
| HadArrayRangeDesignator = ARD; |
| } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LBraceLoc, RBraceLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == InitListExprClass; |
| } |
| static bool classof(const InitListExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| typedef std::vector<Stmt *>::iterator iterator; |
| typedef std::vector<Stmt *>::reverse_iterator reverse_iterator; |
| |
| iterator begin() { return InitExprs.begin(); } |
| iterator end() { return InitExprs.end(); } |
| reverse_iterator rbegin() { return InitExprs.rbegin(); } |
| reverse_iterator rend() { return InitExprs.rend(); } |
| }; |
| |
| /// @brief Represents a C99 designated initializer expression. |
| /// |
| /// A designated initializer expression (C99 6.7.8) contains one or |
| /// more designators (which can be field designators, array |
| /// designators, or GNU array-range designators) followed by an |
| /// expression that initializes the field or element(s) that the |
| /// designators refer to. For example, given: |
| /// |
| /// @code |
| /// struct point { |
| /// double x; |
| /// double y; |
| /// }; |
| /// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; |
| /// @endcode |
| /// |
| /// The InitListExpr contains three DesignatedInitExprs, the first of |
| /// which covers @c [2].y=1.0. This DesignatedInitExpr will have two |
| /// designators, one array designator for @c [2] followed by one field |
| /// designator for @c .y. The initalization expression will be 1.0. |
| class DesignatedInitExpr : public Expr { |
| public: |
| /// \brief Forward declaration of the Designator class. |
| class Designator; |
| |
| private: |
| /// The location of the '=' or ':' prior to the actual initializer |
| /// expression. |
| SourceLocation EqualOrColonLoc; |
| |
| /// Whether this designated initializer used the GNU deprecated |
| /// syntax rather than the C99 '=' syntax. |
| bool GNUSyntax : 1; |
| |
| /// The number of designators in this initializer expression. |
| unsigned NumDesignators : 15; |
| |
| /// \brief The designators in this designated initialization |
| /// expression. |
| Designator *Designators; |
| |
| /// The number of subexpressions of this initializer expression, |
| /// which contains both the initializer and any additional |
| /// expressions used by array and array-range designators. |
| unsigned NumSubExprs : 16; |
| |
| |
| DesignatedInitExpr(QualType Ty, unsigned NumDesignators, |
| const Designator *Designators, |
| SourceLocation EqualOrColonLoc, bool GNUSyntax, |
| Expr **IndexExprs, unsigned NumIndexExprs, |
| Expr *Init); |
| |
| explicit DesignatedInitExpr(unsigned NumSubExprs) |
| : Expr(DesignatedInitExprClass, EmptyShell()), |
| NumDesignators(0), Designators(0), NumSubExprs(NumSubExprs) { } |
| |
| protected: |
| virtual void DoDestroy(ASTContext &C); |
| |
| public: |
| /// A field designator, e.g., ".x". |
| struct FieldDesignator { |
| /// Refers to the field that is being initialized. The low bit |
| /// of this field determines whether this is actually a pointer |
| /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When |
| /// initially constructed, a field designator will store an |
| /// IdentifierInfo*. After semantic analysis has resolved that |
| /// name, the field designator will instead store a FieldDecl*. |
| uintptr_t NameOrField; |
| |
| /// The location of the '.' in the designated initializer. |
| unsigned DotLoc; |
| |
| /// The location of the field name in the designated initializer. |
| unsigned FieldLoc; |
| }; |
| |
| /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". |
| struct ArrayOrRangeDesignator { |
| /// Location of the first index expression within the designated |
| /// initializer expression's list of subexpressions. |
| unsigned Index; |
| /// The location of the '[' starting the array range designator. |
| unsigned LBracketLoc; |
| /// The location of the ellipsis separating the start and end |
| /// indices. Only valid for GNU array-range designators. |
| unsigned EllipsisLoc; |
| /// The location of the ']' terminating the array range designator. |
| unsigned RBracketLoc; |
| }; |
| |
| /// @brief Represents a single C99 designator. |
| /// |
| /// @todo This class is infuriatingly similar to clang::Designator, |
| /// but minor differences (storing indices vs. storing pointers) |
| /// keep us from reusing it. Try harder, later, to rectify these |
| /// differences. |
| class Designator { |
| /// @brief The kind of designator this describes. |
| enum { |
| FieldDesignator, |
| ArrayDesignator, |
| ArrayRangeDesignator |
| } Kind; |
| |
| union { |
| /// A field designator, e.g., ".x". |
| struct FieldDesignator Field; |
| /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". |
| struct ArrayOrRangeDesignator ArrayOrRange; |
| }; |
| friend class DesignatedInitExpr; |
| |
| public: |
| Designator() {} |
| |
| /// @brief Initializes a field designator. |
| Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, |
| SourceLocation FieldLoc) |
| : Kind(FieldDesignator) { |
| Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; |
| Field.DotLoc = DotLoc.getRawEncoding(); |
| Field.FieldLoc = FieldLoc.getRawEncoding(); |
| } |
| |
| /// @brief Initializes an array designator. |
| Designator(unsigned Index, SourceLocation LBracketLoc, |
| SourceLocation RBracketLoc) |
| : Kind(ArrayDesignator) { |
| ArrayOrRange.Index = Index; |
| ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); |
| ArrayOrRange.EllipsisLoc = SourceLocation().getRawEncoding(); |
| ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); |
| } |
| |
| /// @brief Initializes a GNU array-range designator. |
| Designator(unsigned Index, SourceLocation LBracketLoc, |
| SourceLocation EllipsisLoc, SourceLocation RBracketLoc) |
| : Kind(ArrayRangeDesignator) { |
| ArrayOrRange.Index = Index; |
| ArrayOrRange.LBracketLoc = LBracketLoc.getRawEncoding(); |
| ArrayOrRange.EllipsisLoc = EllipsisLoc.getRawEncoding(); |
| ArrayOrRange.RBracketLoc = RBracketLoc.getRawEncoding(); |
| } |
| |
| bool isFieldDesignator() const { return Kind == FieldDesignator; } |
| bool isArrayDesignator() const { return Kind == ArrayDesignator; } |
| bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } |
| |
| IdentifierInfo * getFieldName(); |
| |
| FieldDecl *getField() { |
| assert(Kind == FieldDesignator && "Only valid on a field designator"); |
| if (Field.NameOrField & 0x01) |
| return 0; |
| else |
| return reinterpret_cast<FieldDecl *>(Field.NameOrField); |
| } |
| |
| void setField(FieldDecl *FD) { |
| assert(Kind == FieldDesignator && "Only valid on a field designator"); |
| Field.NameOrField = reinterpret_cast<uintptr_t>(FD); |
| } |
| |
| SourceLocation getDotLoc() const { |
| assert(Kind == FieldDesignator && "Only valid on a field designator"); |
| return SourceLocation::getFromRawEncoding(Field.DotLoc); |
| } |
| |
| SourceLocation getFieldLoc() const { |
| assert(Kind == FieldDesignator && "Only valid on a field designator"); |
| return SourceLocation::getFromRawEncoding(Field.FieldLoc); |
| } |
| |
| SourceLocation getLBracketLoc() const { |
| assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && |
| "Only valid on an array or array-range designator"); |
| return SourceLocation::getFromRawEncoding(ArrayOrRange.LBracketLoc); |
| } |
| |
| SourceLocation getRBracketLoc() const { |
| assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && |
| "Only valid on an array or array-range designator"); |
| return SourceLocation::getFromRawEncoding(ArrayOrRange.RBracketLoc); |
| } |
| |
| SourceLocation getEllipsisLoc() const { |
| assert(Kind == ArrayRangeDesignator && |
| "Only valid on an array-range designator"); |
| return SourceLocation::getFromRawEncoding(ArrayOrRange.EllipsisLoc); |
| } |
| |
| unsigned getFirstExprIndex() const { |
| assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && |
| "Only valid on an array or array-range designator"); |
| return ArrayOrRange.Index; |
| } |
| |
| SourceLocation getStartLocation() const { |
| if (Kind == FieldDesignator) |
| return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); |
| else |
| return getLBracketLoc(); |
| } |
| }; |
| |
| static DesignatedInitExpr *Create(ASTContext &C, Designator *Designators, |
| unsigned NumDesignators, |
| Expr **IndexExprs, unsigned NumIndexExprs, |
| SourceLocation EqualOrColonLoc, |
| bool GNUSyntax, Expr *Init); |
| |
| static DesignatedInitExpr *CreateEmpty(ASTContext &C, unsigned NumIndexExprs); |
| |
| /// @brief Returns the number of designators in this initializer. |
| unsigned size() const { return NumDesignators; } |
| |
| // Iterator access to the designators. |
| typedef Designator* designators_iterator; |
| designators_iterator designators_begin() { return Designators; } |
| designators_iterator designators_end() { |
| return Designators + NumDesignators; |
| } |
| |
| Designator *getDesignator(unsigned Idx) { return &designators_begin()[Idx]; } |
| |
| void setDesignators(const Designator *Desigs, unsigned NumDesigs); |
| |
| Expr *getArrayIndex(const Designator& D); |
| Expr *getArrayRangeStart(const Designator& D); |
| Expr *getArrayRangeEnd(const Designator& D); |
| |
| /// @brief Retrieve the location of the '=' that precedes the |
| /// initializer value itself, if present. |
| SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } |
| void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } |
| |
| /// @brief Determines whether this designated initializer used the |
| /// deprecated GNU syntax for designated initializers. |
| bool usesGNUSyntax() const { return GNUSyntax; } |
| void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } |
| |
| /// @brief Retrieve the initializer value. |
| Expr *getInit() const { |
| return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); |
| } |
| |
| void setInit(Expr *init) { |
| *child_begin() = init; |
| } |
| |
| /// \brief Retrieve the total number of subexpressions in this |
| /// designated initializer expression, including the actual |
| /// initialized value and any expressions that occur within array |
| /// and array-range designators. |
| unsigned getNumSubExprs() const { return NumSubExprs; } |
| |
| Expr *getSubExpr(unsigned Idx) { |
| assert(Idx < NumSubExprs && "Subscript out of range"); |
| char* Ptr = static_cast<char*>(static_cast<void *>(this)); |
| Ptr += sizeof(DesignatedInitExpr); |
| return reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx]; |
| } |
| |
| void setSubExpr(unsigned Idx, Expr *E) { |
| assert(Idx < NumSubExprs && "Subscript out of range"); |
| char* Ptr = static_cast<char*>(static_cast<void *>(this)); |
| Ptr += sizeof(DesignatedInitExpr); |
| reinterpret_cast<Expr**>(reinterpret_cast<void**>(Ptr))[Idx] = E; |
| } |
| |
| /// \brief Replaces the designator at index @p Idx with the series |
| /// of designators in [First, Last). |
| void ExpandDesignator(unsigned Idx, const Designator *First, |
| const Designator *Last); |
| |
| virtual SourceRange getSourceRange() const; |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == DesignatedInitExprClass; |
| } |
| static bool classof(const DesignatedInitExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// \brief Represents an implicitly-generated value initialization of |
| /// an object of a given type. |
| /// |
| /// Implicit value initializations occur within semantic initializer |
| /// list expressions (InitListExpr) as placeholders for subobject |
| /// initializations not explicitly specified by the user. |
| /// |
| /// \see InitListExpr |
| class ImplicitValueInitExpr : public Expr { |
| public: |
| explicit ImplicitValueInitExpr(QualType ty) |
| : Expr(ImplicitValueInitExprClass, ty) { } |
| |
| /// \brief Construct an empty implicit value initialization. |
| explicit ImplicitValueInitExpr(EmptyShell Empty) |
| : Expr(ImplicitValueInitExprClass, Empty) { } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ImplicitValueInitExprClass; |
| } |
| static bool classof(const ImplicitValueInitExpr *) { return true; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(); |
| } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| |
| class ParenListExpr : public Expr { |
| Stmt **Exprs; |
| unsigned NumExprs; |
| SourceLocation LParenLoc, RParenLoc; |
| |
| protected: |
| virtual void DoDestroy(ASTContext& C); |
| |
| public: |
| ParenListExpr(ASTContext& C, SourceLocation lparenloc, Expr **exprs, |
| unsigned numexprs, SourceLocation rparenloc); |
| |
| ~ParenListExpr() {} |
| |
| /// \brief Build an empty paren list. |
| //explicit ParenListExpr(EmptyShell Empty) : Expr(ParenListExprClass, Empty) { } |
| |
| unsigned getNumExprs() const { return NumExprs; } |
| |
| const Expr* getExpr(unsigned Init) const { |
| assert(Init < getNumExprs() && "Initializer access out of range!"); |
| return cast_or_null<Expr>(Exprs[Init]); |
| } |
| |
| Expr* getExpr(unsigned Init) { |
| assert(Init < getNumExprs() && "Initializer access out of range!"); |
| return cast_or_null<Expr>(Exprs[Init]); |
| } |
| |
| Expr **getExprs() { return reinterpret_cast<Expr **>(Exprs); } |
| |
| SourceLocation getLParenLoc() const { return LParenLoc; } |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LParenLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ParenListExprClass; |
| } |
| static bool classof(const ParenListExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Clang Extensions |
| //===----------------------------------------------------------------------===// |
| |
| |
| /// ExtVectorElementExpr - This represents access to specific elements of a |
| /// vector, and may occur on the left hand side or right hand side. For example |
| /// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. |
| /// |
| /// Note that the base may have either vector or pointer to vector type, just |
| /// like a struct field reference. |
| /// |
| class ExtVectorElementExpr : public Expr { |
| Stmt *Base; |
| IdentifierInfo *Accessor; |
| SourceLocation AccessorLoc; |
| public: |
| ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, |
| SourceLocation loc) |
| : Expr(ExtVectorElementExprClass, ty), |
| Base(base), Accessor(&accessor), AccessorLoc(loc) {} |
| |
| /// \brief Build an empty vector element expression. |
| explicit ExtVectorElementExpr(EmptyShell Empty) |
| : Expr(ExtVectorElementExprClass, Empty) { } |
| |
| const Expr *getBase() const { return cast<Expr>(Base); } |
| Expr *getBase() { return cast<Expr>(Base); } |
| void setBase(Expr *E) { Base = E; } |
| |
| IdentifierInfo &getAccessor() const { return *Accessor; } |
| void setAccessor(IdentifierInfo *II) { Accessor = II; } |
| |
| SourceLocation getAccessorLoc() const { return AccessorLoc; } |
| void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } |
| |
| /// getNumElements - Get the number of components being selected. |
| unsigned getNumElements() const; |
| |
| /// containsDuplicateElements - Return true if any element access is |
| /// repeated. |
| bool containsDuplicateElements() const; |
| |
| /// getEncodedElementAccess - Encode the elements accessed into an llvm |
| /// aggregate Constant of ConstantInt(s). |
| void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getBase()->getLocStart(), AccessorLoc); |
| } |
| |
| /// isArrow - Return true if the base expression is a pointer to vector, |
| /// return false if the base expression is a vector. |
| bool isArrow() const; |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ExtVectorElementExprClass; |
| } |
| static bool classof(const ExtVectorElementExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| |
| /// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. |
| /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } |
| class BlockExpr : public Expr { |
| protected: |
| BlockDecl *TheBlock; |
| bool HasBlockDeclRefExprs; |
| public: |
| BlockExpr(BlockDecl *BD, QualType ty, bool hasBlockDeclRefExprs) |
| : Expr(BlockExprClass, ty), |
| TheBlock(BD), HasBlockDeclRefExprs(hasBlockDeclRefExprs) {} |
| |
| /// \brief Build an empty block expression. |
| explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } |
| |
| const BlockDecl *getBlockDecl() const { return TheBlock; } |
| BlockDecl *getBlockDecl() { return TheBlock; } |
| void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } |
| |
| // Convenience functions for probing the underlying BlockDecl. |
| SourceLocation getCaretLocation() const; |
| const Stmt *getBody() const; |
| Stmt *getBody(); |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCaretLocation(), getBody()->getLocEnd()); |
| } |
| |
| /// getFunctionType - Return the underlying function type for this block. |
| const FunctionType *getFunctionType() const; |
| |
| /// hasBlockDeclRefExprs - Return true iff the block has BlockDeclRefExpr |
| /// inside of the block that reference values outside the block. |
| bool hasBlockDeclRefExprs() const { return HasBlockDeclRefExprs; } |
| void setHasBlockDeclRefExprs(bool BDRE) { HasBlockDeclRefExprs = BDRE; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == BlockExprClass; |
| } |
| static bool classof(const BlockExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// BlockDeclRefExpr - A reference to a declared variable, function, |
| /// enum, etc. |
| class BlockDeclRefExpr : public Expr { |
| ValueDecl *D; |
| SourceLocation Loc; |
| bool IsByRef : 1; |
| bool ConstQualAdded : 1; |
| public: |
| BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef, |
| bool constAdded = false) : |
| Expr(BlockDeclRefExprClass, t), D(d), Loc(l), IsByRef(ByRef), |
| ConstQualAdded(constAdded) {} |
| |
| // \brief Build an empty reference to a declared variable in a |
| // block. |
| explicit BlockDeclRefExpr(EmptyShell Empty) |
| : Expr(BlockDeclRefExprClass, Empty) { } |
| |
| ValueDecl *getDecl() { return D; } |
| const ValueDecl *getDecl() const { return D; } |
| void setDecl(ValueDecl *VD) { D = VD; } |
| |
| SourceLocation getLocation() const { return Loc; } |
| void setLocation(SourceLocation L) { Loc = L; } |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| bool isByRef() const { return IsByRef; } |
| void setByRef(bool BR) { IsByRef = BR; } |
| |
| bool isConstQualAdded() const { return ConstQualAdded; } |
| void setConstQualAdded(bool C) { ConstQualAdded = C; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == BlockDeclRefExprClass; |
| } |
| static bool classof(const BlockDeclRefExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| } // end namespace clang |
| |
| #endif |