Edit: /usr/include/boost/hana/comparing.hpp (1222B)
/*!
@file
Defines `boost::hana::comparing`.
@copyright Louis Dionne 2013-2017
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_COMPARING_HPP
#define BOOST_HANA_COMPARING_HPP
#include
#include
#include
#include
BOOST_HANA_NAMESPACE_BEGIN
namespace detail {
template
struct equal_by {
F f;
template
constexpr auto operator()(X&& x, Y&& y) const&
{ return hana::equal(f(static_cast(x)), f(static_cast(y))); }
template
constexpr auto operator()(X&& x, Y&& y) &
{ return hana::equal(f(static_cast(x)), f(static_cast(y))); }
};
}
//! @cond
template
constexpr auto comparing_t::operator()(F&& f) const {
return detail::equal_by::type>{static_cast(f)};
}
//! @endcond
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_COMPARING_HPP