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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "expressionnode.h"
#include "resultnode.h"
namespace search {
namespace expression {
class ConstantNode : public ExpressionNode
{
public:
DECLARE_NBO_SERIALIZE;
DECLARE_EXPRESSIONNODE(ConstantNode);
ConstantNode() : ExpressionNode(), _result() { }
ConstantNode(ResultNode::UP r) : ExpressionNode(), _result(r.release()) { }
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
const ResultNode * getResult() const override { return _result.get(); }
private:
void onPrepare(bool preserveAccurateTypes) override { (void) preserveAccurateTypes; }
bool onExecute() const override { return true; }
ResultNode::CP _result;
};
}
}
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