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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 <vespa/searchlib/common/identifiable.h>
#include <vespa/vespalib/objects/identifiable.hpp>
#include <vespa/vespalib/objects/visit.h>
namespace search::attribute { class IAttributeContext; }
namespace search::expression {
using DocId = uint32_t;
class ResultNode;
#define DECLARE_ABSTRACT_EXPRESSIONNODE(Class) DECLARE_IDENTIFIABLE_ABSTRACT_NS2(search, expression, Class)
#define DECLARE_ABSTRACT_EXPRESSIONNODE_NS1(ns, Class) DECLARE_IDENTIFIABLE_ABSTRACT_NS3(search, expression, ns, Class)
#define DECLARE_EXPRESSIONNODE(Class) \
DECLARE_IDENTIFIABLE_NS2(search, expression, Class) \
Class * clone() const override;
#define DECLARE_EXPRESSIONNODE_NS1(ns, Class) \
DECLARE_IDENTIFIABLE_NS3(search, expression, ns, Class) \
Class * clone() const override;
#define IMPLEMENT_ABSTRACT_EXPRESSIONNODE(Class, base) \
IMPLEMENT_IDENTIFIABLE_ABSTRACT_NS2(search, expression, Class, base)
#define IMPLEMENT_EXPRESSIONNODE(Class, base) \
IMPLEMENT_IDENTIFIABLE_NS2(search, expression, Class, base) \
Class * Class::clone() const { return new Class(*this); }
class ExpressionNode : public vespalib::Identifiable
{
public:
DECLARE_ABSTRACT_EXPRESSIONNODE(ExpressionNode);
using UP = std::unique_ptr<ExpressionNode>;
using CP = vespalib::IdentifiablePtr<ExpressionNode>;
virtual const ResultNode * getResult() const = 0;
bool execute() const { return onExecute(); }
ExpressionNode & prepare(bool preserveAccurateTypes) { onPrepare(preserveAccurateTypes); return *this; }
virtual ExpressionNode * clone() const = 0;
void executeIterative(const ResultNode & arg, ResultNode & result) const;
virtual void wireAttributes(const search::attribute::IAttributeContext &attrCtx);
protected:
private:
virtual void onArgument(const ResultNode & arg, ResultNode & result) const;
virtual void onPrepare(bool preserveAccurateTypes) = 0;
virtual bool onExecute() const = 0;
};
using ExpressionNodeArray = ExpressionNode::CP *;
}
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