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221 lines
4.8 KiB
221 lines
4.8 KiB
#ifndef BOOST_MP11_FUNCTION_HPP_INCLUDED |
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#define BOOST_MP11_FUNCTION_HPP_INCLUDED |
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// Copyright 2015-2019 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 <boost/mp11/detail/mp_plus.hpp> |
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#include <boost/mp11/detail/mp_min_element.hpp> |
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#include <boost/mp11/detail/mp_void.hpp> |
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#include <boost/mp11/detail/config.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_void<T...> |
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// in detail/mp_void.hpp |
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// mp_and<T...> |
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#if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1910 ) |
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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 = mp_to_bool< 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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#else |
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namespace detail |
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{ |
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template<class L, class E = void> struct mp_and_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_and_impl< mp_list<T...>, mp_void<mp_if<T, void>...> > |
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{ |
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using type = mp_true; |
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}; |
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} // namespace detail |
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template<class... T> using mp_and = typename detail::mp_and_impl<mp_list<T...>>::type; |
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#endif |
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// mp_all<T...> |
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// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86355 |
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#if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 ) || BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, != 0 ) |
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template<class... T> using mp_all = mp_bool< mp_count_if< mp_list<T...>, mp_not >::value == 0 >; |
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#elif defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS ) |
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template<class... T> using mp_all = mp_bool<(static_cast<bool>(T::value) && ...)>; |
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#else |
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template<class... T> using mp_all = mp_and<mp_to_bool<T>...>; |
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#endif |
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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 = mp_to_bool< 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_any<T...> |
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// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86356 |
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#if defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS ) && !BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, != 0 ) && !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 ) |
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template<class... T> using mp_any = mp_bool<(static_cast<bool>(T::value) || ...)>; |
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#else |
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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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#endif |
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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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// mp_similar<T...> |
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namespace detail |
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{ |
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template<class... T> struct mp_similar_impl; |
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template<> struct mp_similar_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_similar_impl<T> |
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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_similar_impl<T, T> |
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{ |
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using type = mp_true; |
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}; |
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template<class T1, class T2> struct mp_similar_impl<T1, T2> |
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{ |
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using type = mp_false; |
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}; |
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template<template<class...> class L, class... T1, class... T2> struct mp_similar_impl<L<T1...>, L<T2...>> |
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{ |
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using type = mp_true; |
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}; |
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template<class T1, class T2, class T3, class... T> struct mp_similar_impl<T1, T2, T3, T...> |
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{ |
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using type = mp_all< typename mp_similar_impl<T1, T2>::type, typename mp_similar_impl<T1, T3>::type, typename mp_similar_impl<T1, T>::type... >; |
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}; |
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} // namespace detail |
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template<class... T> using mp_similar = typename detail::mp_similar_impl<T...>::type; |
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#if BOOST_MP11_GCC |
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# pragma GCC diagnostic push |
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# pragma GCC diagnostic ignored "-Wsign-compare" |
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#endif |
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// mp_less<T1, T2> |
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template<class T1, class T2> using mp_less = mp_bool<(T1::value < 0 && T2::value >= 0) || ((T1::value < T2::value) && !(T1::value >= 0 && T2::value < 0))>; |
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#if BOOST_MP11_GCC |
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# pragma GCC diagnostic pop |
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#endif |
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// mp_min<T...> |
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template<class T1, class... T> using mp_min = mp_min_element<mp_list<T1, T...>, mp_less>; |
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// mp_max<T...> |
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template<class T1, class... T> using mp_max = mp_max_element<mp_list<T1, T...>, mp_less>; |
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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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