boost/smart_ptr/owner_equal_to.hpp

0001 #ifndef BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED
0002 #define BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED
0003
0004 // Copyright 2020 Peter Dimov
0005 // Distributed under the Boost Software License, Version 1.0.
0006 // https://www.boost.org/LICENSE_1_0.txt
0007
0008 namespace boost
0009 {
0010
0011 template<class T = void> struct owner_equal_to
0012 {
0013     typedef bool result_type;
0014     typedef T first_argument_type;
0015     typedef T second_argument_type;
0016
0017     template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept
0018     {
0019         return u.owner_equals( v );
0020     }
0021 };
0022
0023 } // namespace boost
0024
0025 #endif  // #ifndef BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED