forked from boostorg/mp11
112 lines
2.1 KiB
C++
112 lines
2.1 KiB
C++
#ifndef BOOST_MP11_FUNCTION_HPP_INCLUDED
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#define BOOST_MP11_FUNCTION_HPP_INCLUDED
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// Copyright 2015-2017 Peter Dimov.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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#include <boost/mp11/integral.hpp>
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#include <boost/mp11/utility.hpp>
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#include <boost/mp11/detail/mp_list.hpp>
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#include <boost/mp11/detail/mp_count.hpp>
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#include <type_traits>
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namespace boost
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{
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namespace mp11
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{
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// mp_all<T...>
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template<class... T> using mp_all = mp_bool< mp_count_if< mp_list<T...>, mp_to_bool >::value == sizeof...(T) >;
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// mp_and<T...>
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namespace detail
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{
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template<class... T> struct mp_and_impl;
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} // namespace detail
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template<class... T> using mp_and = typename detail::mp_and_impl<T...>::type;
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namespace detail
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{
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template<> struct mp_and_impl<>
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{
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using type = mp_true;
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};
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template<class T> struct mp_and_impl<T>
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{
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using type = T;
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};
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template<class T1, class... T> struct mp_and_impl<T1, T...>
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{
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using type = mp_eval_if< mp_not<T1>, T1, mp_and, T... >;
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};
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} // namespace detail
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// mp_any<T...>
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template<class... T> using mp_any = mp_bool< mp_count_if< mp_list<T...>, mp_to_bool >::value != 0 >;
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// mp_or<T...>
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namespace detail
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{
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template<class... T> struct mp_or_impl;
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} // namespace detail
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template<class... T> using mp_or = typename detail::mp_or_impl<T...>::type;
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namespace detail
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{
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template<> struct mp_or_impl<>
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{
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using type = mp_false;
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};
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template<class T> struct mp_or_impl<T>
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{
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using type = T;
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};
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template<class T1, class... T> struct mp_or_impl<T1, T...>
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{
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using type = mp_eval_if< T1, T1, mp_or, T... >;
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};
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} // namespace detail
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// mp_same<T...>
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namespace detail
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{
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template<class... T> struct mp_same_impl;
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template<> struct mp_same_impl<>
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{
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using type = mp_true;
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};
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template<class T1, class... T> struct mp_same_impl<T1, T...>
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{
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using type = mp_all<std::is_same<T1, T>...>;
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};
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} // namespace detail
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template<class... T> using mp_same = typename detail::mp_same_impl<T...>::type;
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} // namespace mp11
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} // namespace boost
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#endif // #ifndef BOOST_MP11_FUNCTION_HPP_INCLUDED
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