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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class document::select::Constant
* @ingroup select
*
* @brief Class describing a constant in the select tree.
*
* @author Håkon Humberset
* @date 2005-06-07
*/
#pragma once
#include "node.h"
namespace document::select {
class Constant : public Node
{
private:
bool _value;
public:
explicit Constant(bool value);
ResultList contains(const Context&) const override {
return ResultList(Result::get(_value));
}
ResultList trace(const Context&, std::ostream& trace) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
void visit(Visitor& v) const override;
bool getConstantValue() const noexcept { return _value; }
Node::UP clone() const override { return wrapParens(new Constant(_value)); }
};
}
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