mirror of
https://github.com/PurpleI2P/Boost-for-Android-Prebuilt
synced 2025-01-26 06:25:18 +00:00
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/*!
|
|
@file
|
|
Defines `boost::hana::not_equal`.
|
|
|
|
@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_NOT_EQUAL_HPP
|
|
#define BOOST_HANA_NOT_EQUAL_HPP
|
|
|
|
#include <boost/hana/fwd/not_equal.hpp>
|
|
|
|
#include <boost/hana/concept/comparable.hpp>
|
|
#include <boost/hana/config.hpp>
|
|
#include <boost/hana/core/to.hpp>
|
|
#include <boost/hana/core/dispatch.hpp>
|
|
#include <boost/hana/detail/has_common_embedding.hpp>
|
|
#include <boost/hana/detail/nested_to.hpp> // required by fwd decl
|
|
#include <boost/hana/equal.hpp>
|
|
#include <boost/hana/not.hpp>
|
|
|
|
|
|
BOOST_HANA_NAMESPACE_BEGIN
|
|
//! @cond
|
|
template <typename X, typename Y>
|
|
constexpr auto not_equal_t::operator()(X&& x, Y&& y) const {
|
|
using T = typename hana::tag_of<X>::type;
|
|
using U = typename hana::tag_of<Y>::type;
|
|
using NotEqual = not_equal_impl<T, U>;
|
|
return NotEqual::apply(static_cast<X&&>(x), static_cast<Y&&>(y));
|
|
}
|
|
//! @endcond
|
|
|
|
template <typename T, typename U, bool condition>
|
|
struct not_equal_impl<T, U, when<condition>> : default_ {
|
|
template <typename X, typename Y>
|
|
static constexpr decltype(auto) apply(X&& x, Y&& y) {
|
|
return hana::not_(hana::equal(static_cast<X&&>(x),
|
|
static_cast<Y&&>(y)));
|
|
}
|
|
};
|
|
|
|
// Cross-type overload
|
|
template <typename T, typename U>
|
|
struct not_equal_impl<T, U, when<
|
|
detail::has_nontrivial_common_embedding<Comparable, T, U>::value
|
|
>> {
|
|
using C = typename hana::common<T, U>::type;
|
|
template <typename X, typename Y>
|
|
static constexpr decltype(auto) apply(X&& x, Y&& y) {
|
|
return hana::not_equal(hana::to<C>(static_cast<X&&>(x)),
|
|
hana::to<C>(static_cast<Y&&>(y)));
|
|
}
|
|
};
|
|
BOOST_HANA_NAMESPACE_END
|
|
|
|
#endif // !BOOST_HANA_NOT_EQUAL_HPP
|