boost/uuid/uuid_hash.hpp


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//
// Copyright (c) 2018 James E. King III
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
//   http://www.boost.org/LICENCE_1_0.txt)
//
// std::hash support for uuid
//

#ifndef BOOST_UUID_HASH_HPP
#define BOOST_UUID_HASH_HPP

#include <boost/config.hpp>
#include <boost/container_hash/hash.hpp>
#include <boost/uuid/uuid_io.hpp>

#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif

#ifndef BOOST_NO_CXX11_HDR_FUNCTIONAL

#include <cstddef>
#include <functional>

namespace std
{
    template<>
    struct hash<boost::uuids::uuid>
    {
        std::size_t operator () (const boost::uuids::uuid& value) const BOOST_NOEXCEPT
        {
            return boost::hash_value(to_string(value));
        }
    };
}

#endif /* !BOOST_NO_CXX11_HDR_FUNCTIONAL */
#endif /* !BOOST_UUID_HASH_HPP */