#ifndef XPathPredicate_h
#define XPathPredicate_h
#if ENABLE(XPATH)
#include "XPathExpressionNode.h"
#include "XPathValue.h"
namespace WebCore {
namespace XPath {
class Number : public Expression {
public:
Number(double);
private:
virtual Value evaluate() const;
Value m_value;
};
class StringExpression : public Expression {
public:
StringExpression(const String&);
private:
virtual Value evaluate() const;
Value m_value;
};
class Negative : public Expression {
private:
virtual Value evaluate() const;
};
class NumericOp : public Expression {
public:
enum Opcode {
OP_Add, OP_Sub, OP_Mul, OP_Div, OP_Mod
};
NumericOp(Opcode, Expression* lhs, Expression* rhs);
private:
virtual Value evaluate() const;
Opcode m_opcode;
};
class EqTestOp : public Expression {
public:
enum Opcode { OP_EQ, OP_NE, OP_GT, OP_LT, OP_GE, OP_LE };
EqTestOp(Opcode, Expression* lhs, Expression* rhs);
virtual Value evaluate() const;
private:
bool compare(const Value&, const Value&) const;
Opcode m_opcode;
};
class LogicalOp : public Expression {
public:
enum Opcode { OP_And, OP_Or };
LogicalOp(Opcode, Expression* lhs, Expression* rhs);
private:
bool shortCircuitOn() const;
virtual Value evaluate() const;
Opcode m_opcode;
};
class Union : public Expression {
private:
virtual Value evaluate() const;
};
class Predicate : Noncopyable {
public:
Predicate(Expression*);
~Predicate();
bool evaluate() const;
private:
Expression* m_expr;
};
}
}
#endif // ENABLE(XPATH)
#endif // XPathPredicate_h