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Diffstat (limited to 'boost/hana/detail/variadic/reverse_apply/flat.hpp')
| -rw-r--r-- | boost/hana/detail/variadic/reverse_apply/flat.hpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/boost/hana/detail/variadic/reverse_apply/flat.hpp b/boost/hana/detail/variadic/reverse_apply/flat.hpp new file mode 100644 index 0000000000..6cd7bed53a --- /dev/null +++ b/boost/hana/detail/variadic/reverse_apply/flat.hpp @@ -0,0 +1,41 @@ +/*! +@file +Defines `boost::hana::detail::variadic::reverse_apply_flat`. + +@copyright Louis Dionne 2013-2016 +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_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP +#define BOOST_HANA_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP + +#include <boost/hana/config.hpp> +#include <boost/hana/detail/variadic/at.hpp> + +#include <utility> + + +BOOST_HANA_NAMESPACE_BEGIN namespace detail { namespace variadic { + template <int ...i, typename F, typename ...X> + constexpr decltype(auto) + reverse_apply_flat_helper(std::integer_sequence<int, i...>, F&& f, X&& ...x) + { + return static_cast<F&&>(f)( + detail::variadic::at<sizeof...(x) - i - 1>( + static_cast<X&&>(x)... + )... + ); + } + + template <typename F, typename ...X> + constexpr decltype(auto) reverse_apply_flat(F&& f, X&& ...x) { + return reverse_apply_flat_helper( + std::make_integer_sequence<int, sizeof...(x)>{}, + static_cast<F&&>(f), + static_cast<X&&>(x)... + ); + } +}} BOOST_HANA_NAMESPACE_END + +#endif // !BOOST_HANA_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP |