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#ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED
#define BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED

//
//  owner_less.hpp
//
//  Copyright (c) 2008 Frank Mori Hess
//  Copyright (c) 2016 Peter Dimov
//
//  Distributed under the Boost Software License, Version 1.0. (See
//  accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)
//
//  See http://www.boost.org/libs/smart_ptr/ for documentation.
//

namespace boost
{

template<class T = void> struct owner_less
{
    typedef bool result_type;
    typedef T first_argument_type;
    typedef T second_argument_type;

    template<class U, class V> bool operator()( U const & u, V const & v ) const
    {
        return u.owner_before( v );
    }
};

} // namespace boost

#endif  // #ifndef BOOST_SMART_PTR_OWNER_LESS_HPP_INCLUDED