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clang-1/include/clang/AST/Expr.h

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//===--- 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;
/// 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;
protected:
// 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);
}
public:
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; }
/// 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; }
/// 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(); }
/// hasLocalSideEffect - Return true if this immediate expression has side
/// effects, not counting any sub-expressions.
bool hasLocalSideEffect() 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]]
///
enum isLvalueResult {
LV_Valid,
LV_NotObjectType,
LV_IncompleteVoidType,
LV_DuplicateVectorComponents,
LV_InvalidExpression,
LV_MemberFunction
};
isLvalueResult isLvalue(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.
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) const;
bool isBitField();
/// getIntegerConstantExprValue() - Return the value of an integer
/// constant expression. The expression must be a valid integer
/// constant expression as determined by isIntegerConstantExpr.
llvm::APSInt getIntegerConstantExprValue(ASTContext &Ctx) const {
llvm::APSInt X;
bool success = isIntegerConstantExpr(X, Ctx);
success = success;
assert(success && "Illegal argument to getIntegerConstantExpr");
return X;
}
/// 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 scalar 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;
/// 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;
/// hasGlobalStorage - Return true if this expression has static storage
/// duration. This means that the address of this expression is a link-time
/// constant.
bool hasGlobalStorage() 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();
const Expr* IgnoreParens() const {
return const_cast<Expr*>(this)->IgnoreParens();
}
const Expr *IgnoreParenCasts() const {
return const_cast<Expr*>(this)->IgnoreParenCasts();
}
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; }
static inline Expr* Create(llvm::Deserializer& D, ASTContext& C) {
return cast<Expr>(Stmt::Create(D, C));
}
};
//===----------------------------------------------------------------------===//
// 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) {}
NamedDecl *getDecl() { return D; }
const NamedDecl *getDecl() const { return D; }
void setDecl(NamedDecl *NewD) { D = NewD; }
SourceLocation getLocation() const { return Loc; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static DeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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), Loc(l), Type(IT) {}
IdentType getIdentType() const { return Type; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static PredefinedExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
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");
}
const llvm::APInt &getValue() const { return Value; }
virtual SourceRange getSourceRange() const { return SourceRange(Loc); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static IntegerLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
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) {
}
SourceLocation getLoc() const { return Loc; }
bool isWide() const { return IsWide; }
virtual SourceRange getSourceRange() const { return SourceRange(Loc); }
unsigned getValue() const { return Value; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static CharacterLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
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) {}
const llvm::APFloat &getValue() const { return Value; }
bool isExact() const { return IsExact; }
/// 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;
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static FloatingLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) {}
const Expr *getSubExpr() const { return cast<Expr>(Val); }
Expr *getSubExpr() { return cast<Expr>(Val); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ImaginaryLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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.
class StringLiteral : public Expr {
const char *StrData;
unsigned ByteLength;
bool IsWide;
// if the StringLiteral was composed using token pasting, both locations
// are needed. If not (the common case), firstTokLoc == lastTokLoc.
// FIXME: if space becomes an issue, we should create a sub-class.
SourceLocation firstTokLoc, lastTokLoc;
public:
StringLiteral(ASTContext& C, const char *strData, unsigned byteLength,
bool Wide, QualType t, SourceLocation b, SourceLocation e);
void Destroy(ASTContext& C);
const char *getStrData() const { return StrData; }
unsigned getByteLength() const { return ByteLength; }
bool isWide() const { return IsWide; }
virtual SourceRange getSourceRange() const {
return SourceRange(firstTokLoc,lastTokLoc);
}
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static StringLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) {}
const Expr *getSubExpr() const { return cast<Expr>(Val); }
Expr *getSubExpr() { return cast<Expr>(Val); }
virtual SourceRange getSourceRange() const { return SourceRange(L, R); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ParenExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) {}
Opcode getOpcode() const { return Opc; }
Expr *getSubExpr() const { return cast<Expr>(Val); }
/// getOperatorLoc - Return the location of the operator.
SourceLocation getOperatorLoc() const { return Loc; }
/// isPostfix - Return true if this is a postfix operation, like x++.
static bool isPostfix(Opcode Op);
/// isPostfix - Return true if this is a prefix operation, like --x.
static bool isPrefix(Opcode Op);
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; }
/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
/// corresponds to, e.g. "sizeof" or "[pre]++"
static const char *getOpcodeStr(Opcode Op);
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; }
int64_t evaluateOffsetOf(ASTContext& C) const;
// Iterators
virtual child_iterator child_begin();
virtual child_iterator child_end();
virtual void EmitImpl(llvm::Serializer& S) const;
static UnaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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;
public:
SizeOfAlignOfExpr(bool issizeof, bool istype, void *argument,
QualType resultType, SourceLocation op,
SourceLocation rp) :
Expr(SizeOfAlignOfExprClass, resultType), isSizeof(issizeof),
isType(istype), OpLoc(op), RParenLoc(rp) {
if (isType)
Argument.Ty = argument;
else
// argument was an Expr*, so cast it back to that to be safe
Argument.Ex = static_cast<Expr*>(argument);
}
virtual void Destroy(ASTContext& C);
bool isSizeOf() const { return isSizeof; }
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();
}
/// 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; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static SizeOfAlignOfExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
//===----------------------------------------------------------------------===//
// 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), RBracketLoc(rbracketloc) {
SubExprs[LHS] = lhs;
SubExprs[RHS] = rhs;
}
/// 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]); }
Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); }
const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
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);
}
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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;
// This version of the ctor is for deserialization.
CallExpr(StmtClass SC, Stmt** subexprs, unsigned numargs, QualType t,
SourceLocation rparenloc)
: Expr(SC,t), SubExprs(subexprs),
NumArgs(numargs), RParenLoc(rparenloc) {}
protected:
// This version of the constructor is for derived classes.
CallExpr(StmtClass SC, Expr *fn, Expr **args, unsigned numargs, QualType t,
SourceLocation rparenloc);
public:
CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t,
SourceLocation rparenloc);
~CallExpr() { delete [] SubExprs; }
const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); }
Expr *getCallee() { return cast<Expr>(SubExprs[FN]); }
void setCallee(Expr *F) { SubExprs[FN] = F; }
/// 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() const;
SourceLocation getRParenLoc() const { return RParenLoc; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static CallExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C,
StmtClass SC);
};
/// MemberExpr - [C99 6.5.2.3] Structure and Union Members.
///
class MemberExpr : public Expr {
Stmt *Base;
NamedDecl *MemberDecl;
SourceLocation MemberLoc;
bool IsArrow; // True if this is "X->F", false if this is "X.F".
public:
MemberExpr(Expr *base, bool isarrow, NamedDecl *memberdecl, SourceLocation l,
QualType ty)
: Expr(MemberExprClass, ty),
Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {}
void setBase(Expr *E) { Base = E; }
Expr *getBase() const { return cast<Expr>(Base); }
NamedDecl *getMemberDecl() const { return MemberDecl; }
void setMemberDecl(NamedDecl *D) { MemberDecl = D; }
bool isArrow() const { return IsArrow; }
virtual SourceRange getSourceRange() const {
return SourceRange(getBase()->getLocStart(), MemberLoc);
}
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static MemberExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) {}
const Expr *getInitializer() const { return cast<Expr>(Init); }
Expr *getInitializer() { return cast<Expr>(Init); }
bool isFileScope() const { return FileScope; }
SourceLocation getLParenLoc() const { return LParenLoc; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static CompoundLiteralExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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 {
Stmt *Op;
protected:
CastExpr(StmtClass SC, QualType ty, 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())),
Op(op) {}
public:
Expr *getSubExpr() { return cast<Expr>(Op); }
const Expr *getSubExpr() const { return cast<Expr>(Op); }
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, Expr *op, bool Lvalue) :
CastExpr(ImplicitCastExprClass, ty, op), LvalueCast(Lvalue) { }
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; }
virtual void EmitImpl(llvm::Serializer& S) const;
static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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, Expr *op, QualType writtenTy)
: CastExpr(SC, exprTy, op), TypeAsWritten(writtenTy) {}
public:
/// getTypeAsWritten - Returns the type that this expression is
/// casting to, as written in the source code.
QualType getTypeAsWritten() const { return TypeAsWritten; }
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, Expr *op, QualType writtenTy,
SourceLocation l, SourceLocation r) :
ExplicitCastExpr(CStyleCastExprClass, exprTy, op, writtenTy),
LPLoc(l), RPLoc(r) {}
SourceLocation getLParenLoc() const { return LPLoc; }
SourceLocation getRParenLoc() const { return RPLoc; }
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; }
virtual void EmitImpl(llvm::Serializer& S) const;
static CStyleCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
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");
}
SourceLocation getOperatorLoc() const { return OpLoc; }
Opcode getOpcode() const { return Opc; }
Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); }
Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
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);
/// 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();
virtual void EmitImpl(llvm::Serializer& S) const;
static BinaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C);
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;
}
};
/// 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 ComputationType;
public:
CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc,
QualType ResType, QualType CompType,
SourceLocation OpLoc)
: BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true),
ComputationType(CompType) {
assert(isCompoundAssignmentOp() &&
"Only should be used for compound assignments");
}
QualType getComputationType() const { return ComputationType; }
static bool classof(const CompoundAssignOperator *) { return true; }
static bool classof(const Stmt *S) {
return S->getStmtClass() == CompoundAssignOperatorClass;
}
virtual void EmitImpl(llvm::Serializer& S) const;
static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D,
ASTContext& C);
};
/// 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.
public:
ConditionalOperator(Expr *cond, Expr *lhs, 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()))) {
SubExprs[COND] = cond;
SubExprs[LHS] = lhs;
SubExprs[RHS] = rhs;
}
// getCond - Return the expression representing the condition for
// the ?: operator.
Expr *getCond() const { return cast<Expr>(SubExprs[COND]); }
// 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]); }
Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ConditionalOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) {}
virtual SourceRange getSourceRange() const {
return SourceRange(AmpAmpLoc, LabelLoc);
}
LabelStmt *getLabel() const { return Label; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static AddrLabelExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) { }
CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); }
const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); }
virtual SourceRange getSourceRange() const {
return SourceRange(LParenLoc, RParenLoc);
}
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static StmtExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// TypesCompatibleExpr - GNU builtin-in function __builtin_type_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) {}
QualType getArgType1() const { return Type1; }
QualType getArgType2() const { return Type2; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static TypesCompatibleExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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;
public:
ShuffleVectorExpr(Expr **args, unsigned nexpr,
QualType Type, SourceLocation BLoc,
SourceLocation RP) :
Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc),
RParenLoc(RP), NumExprs(nexpr) {
SubExprs = new Stmt*[nexpr];
for (unsigned i = 0; i < nexpr; i++)
SubExprs[i] = args[i];
}
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() {
delete [] SubExprs;
}
/// 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]);
}
unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) {
assert((N < NumExprs - 2) && "Shuffle idx out of range!");
return getExpr(N+2)->getIntegerConstantExprValue(Ctx).getZExtValue();
}
// Iterators
virtual child_iterator child_begin();
virtual child_iterator child_end();
virtual void EmitImpl(llvm::Serializer& S) const;
static ShuffleVectorExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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 constant expression.
/// - the expression returned has it's type unaltered by promotion rules.
/// - does not evaluate the expression that was not chosen.
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;
}
/// isConditionTrue - Return true if the condition is true. This is always
/// statically knowable for a well-formed choosexpr.
bool isConditionTrue(ASTContext &C) const;
Expr *getCond() const { return cast<Expr>(SubExprs[COND]); }
Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); }
Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ChooseExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) { }
/// getTokenLocation - The location of the __null token.
SourceLocation getTokenLocation() const { return TokenLoc; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static GNUNullExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// OverloadExpr - Clang builtin function __builtin_overload.
/// This AST node provides a way to overload functions in C.
///
/// The first argument is required to be a constant expression, for the number
/// of arguments passed to each candidate function.
///
/// The next N arguments, where N is the value of the constant expression,
/// are the values to be passed as arguments.
///
/// The rest of the arguments are values of pointer to function type, which
/// are the candidate functions for overloading.
///
/// The result is a equivalent to a CallExpr taking N arguments to the
/// candidate function whose parameter types match the types of the N arguments.
///
/// example: float Z = __builtin_overload(2, X, Y, modf, mod, modl);
/// If X and Y are long doubles, Z will assigned the result of modl(X, Y);
/// If X and Y are floats, Z will be assigned the result of modf(X, Y);
class OverloadExpr : public Expr {
// SubExprs - the list of values passed to the __builtin_overload function.
// SubExpr[0] is a constant expression
// SubExpr[1-N] are the parameters to pass to the matching function call
// SubExpr[N-...] are the candidate functions, of type pointer to function.
Stmt **SubExprs;
// NumExprs - the size of the SubExprs array
unsigned NumExprs;
// The index of the matching candidate function
unsigned FnIndex;
SourceLocation BuiltinLoc;
SourceLocation RParenLoc;
public:
OverloadExpr(Expr **args, unsigned nexprs, unsigned idx, QualType t,
SourceLocation bloc, SourceLocation rploc)
: Expr(OverloadExprClass, t), NumExprs(nexprs), FnIndex(idx),
BuiltinLoc(bloc), RParenLoc(rploc) {
SubExprs = new Stmt*[nexprs];
for (unsigned i = 0; i != nexprs; ++i)
SubExprs[i] = args[i];
}
~OverloadExpr() {
delete [] SubExprs;
}
/// arg_begin - Return a pointer to the list of arguments that will be passed
/// to the matching candidate function, skipping over the initial constant
/// expression.
typedef ConstExprIterator const_arg_iterator;
const_arg_iterator arg_begin() const { return &SubExprs[0]+1; }
const_arg_iterator arg_end(ASTContext& Ctx) const {
return &SubExprs[0]+1+getNumArgs(Ctx);
}
/// getNumArgs - Return the number of arguments to pass to the candidate
/// functions.
unsigned getNumArgs(ASTContext &Ctx) const {
return getExpr(0)->getIntegerConstantExprValue(Ctx).getZExtValue();
}
/// 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) const {
assert((Index < NumExprs) && "Arg access out of range!");
return cast<Expr>(SubExprs[Index]);
}
/// getFn - Return the matching candidate function for this OverloadExpr.
Expr *getFn() const { return cast<Expr>(SubExprs[FnIndex]); }
virtual SourceRange getSourceRange() const {
return SourceRange(BuiltinLoc, RParenLoc);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == OverloadExprClass;
}
static bool classof(const OverloadExpr *) { return true; }
// Iterators
virtual child_iterator child_begin();
virtual child_iterator child_end();
virtual void EmitImpl(llvm::Serializer& S) const;
static OverloadExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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) { }
const Expr *getSubExpr() const { return cast<Expr>(Val); }
Expr *getSubExpr() { return cast<Expr>(Val); }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static VAArgExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// @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 {
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);
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 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();
}
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() {
HadArrayRangeDesignator = true;
}
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(); }
// Serailization.
virtual void EmitImpl(llvm::Serializer& S) const;
static InitListExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
private:
// Used by serializer.
InitListExpr() : Expr(InitListExprClass, QualType()) {}
};
/// @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 {
/// 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 UsesColonSyntax : 1;
/// The number of designators in this initializer expression.
unsigned NumDesignators : 15;
/// 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,
SourceLocation EqualOrColonLoc, bool UsesColonSyntax,
unsigned NumSubExprs)
: Expr(DesignatedInitExprClass, Ty),
EqualOrColonLoc(EqualOrColonLoc), UsesColonSyntax(UsesColonSyntax),
NumDesignators(NumDesignators), NumSubExprs(NumSubExprs) { }
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:
/// @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);
}
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 UsesColonSyntax, Expr *Init);
/// @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();
designators_iterator designators_end();
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; }
/// @brief Determines whether this designated initializer used the
/// GNU 'fieldname:' syntax or the C99 '=' syntax.
bool usesColonSyntax() const { return UsesColonSyntax; }
/// @brief Retrieve the initializer value.
Expr *getInit() const {
return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin());
}
void setInit(Expr *init) {
*child_begin() = init;
}
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 initialize
/// list expressions (\see InitListExpr) as placeholders for subobject
/// initializations not explicitly specified by the user.
class ImplicitValueInitExpr : public Expr {
public:
explicit ImplicitValueInitExpr(QualType ty)
: Expr(ImplicitValueInitExprClass, ty) { }
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();
};
//===----------------------------------------------------------------------===//
// 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.
///
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) {}
const Expr *getBase() const { return cast<Expr>(Base); }
Expr *getBase() { return cast<Expr>(Base); }
IdentifierInfo &getAccessor() const { return Accessor; }
/// 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);
}
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static ExtVectorElementExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// 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;
public:
BlockExpr(BlockDecl *BD, QualType ty) : Expr(BlockExprClass, ty),
TheBlock(BD) {}
BlockDecl *getBlockDecl() { return TheBlock; }
// 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;
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static BlockExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
/// BlockDeclRefExpr - A reference to a declared variable, function,
/// enum, etc.
class BlockDeclRefExpr : public Expr {
ValueDecl *D;
SourceLocation Loc;
bool IsByRef;
public:
BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef) :
Expr(BlockDeclRefExprClass, t), D(d), Loc(l), IsByRef(ByRef) {}
ValueDecl *getDecl() { return D; }
const ValueDecl *getDecl() const { return D; }
virtual SourceRange getSourceRange() const { return SourceRange(Loc); }
bool isByRef() const { return IsByRef; }
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();
virtual void EmitImpl(llvm::Serializer& S) const;
static BlockDeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C);
};
} // end namespace clang
#endif
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