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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 "searchiterator.h"
#include <vespa/searchlib/common/bitvector.h>
namespace search::queryeval {
/** Search iterator that never yields any hits. */
class EmptySearch : public SearchIterator
{
protected:
void doSeek(uint32_t) override;
void doUnpack(uint32_t) override;
void or_hits_into(BitVector &result, uint32_t begin_id) override;
void and_hits_into(BitVector &result, uint32_t begin_id) override;
BitVector::UP get_hits(uint32_t begin_id) override;
void initRange(uint32_t begin, uint32_t end) override {
SearchIterator::initRange(begin, end);
setAtEnd();
}
virtual Trinary is_strict() const override;
Trinary matches_any() const override { return Trinary::False; }
public:
EmptySearch();
~EmptySearch();
};
}
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