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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
namespace ROCKSDB_NAMESPACE {
// A comparator to be used in std::set
struct SetComparator {
explicit SetComparator() : user_comparator_(BytewiseComparator()) {}
explicit SetComparator(const Comparator* user_comparator)
: user_comparator_(user_comparator ? user_comparator
: BytewiseComparator()) {}
bool operator()(const Slice& lhs, const Slice& rhs) const {
return user_comparator_->Compare(lhs, rhs) < 0;
}
private:
const Comparator* user_comparator_;
};
} // namespace ROCKSDB_NAMESPACE
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