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ref_pair.hpp
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// SPDX-FileCopyrightText: 2020 - 2025 Kohei Yoshida
//
// SPDX-License-Identifier: MIT
#pragma once
#include <type_traits>
namespace mdds { namespace detail {
template<typename T1, typename T2>
struct ref_pair
{
using first_type = typename std::add_lvalue_reference<T1>::type;
using second_type = typename std::add_lvalue_reference<T2>::type;
first_type first;
second_type second;
ref_pair(first_type _first, second_type _second) : first(_first), second(_second)
{}
ref_pair(const ref_pair& other) = default;
bool operator==(const std::pair<typename std::decay<T1>::type, typename std::decay<T2>::type>& other) const
{
return first == other.first && second == other.second;
}
bool operator!=(const std::pair<typename std::decay<T1>::type, typename std::decay<T2>::type>& other) const
{
return !operator==(other);
}
bool operator==(const ref_pair& other) const
{
return first == other.first && second == other.second;
}
bool operator!=(const ref_pair& other) const
{
return !operator==(other);
}
ref_pair* operator->()
{
return this;
}
};
}} // namespace mdds::detail
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */