1/*!
2@file
3Defines `boost::hana::detail::variadic::reverse_apply_flat`.
4
5Copyright Louis Dionne 2013-2022
6Distributed under the Boost Software License, Version 1.0.
7(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
8 */
9
10#ifndef BOOST_HANA_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP
11#define BOOST_HANA_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP
12
13#include <boost/hana/config.hpp>
14#include <boost/hana/detail/variadic/at.hpp>
15
16#include <utility>
17
18
19namespace boost { namespace hana { namespace detail { namespace variadic {
20 template <int ...i, typename F, typename ...X>
21 constexpr decltype(auto)
22 reverse_apply_flat_helper(std::integer_sequence<int, i...>, F&& f, X&& ...x)
23 {
24 return static_cast<F&&>(f)(
25 detail::variadic::at<sizeof...(x) - i - 1>(
26 static_cast<X&&>(x)...
27 )...
28 );
29 }
30
31 template <typename F, typename ...X>
32 constexpr decltype(auto) reverse_apply_flat(F&& f, X&& ...x) {
33 return reverse_apply_flat_helper(
34 std::make_integer_sequence<int, sizeof...(x)>{},
35 static_cast<F&&>(f),
36 static_cast<X&&>(x)...
37 );
38 }
39}} }} // end namespace boost::hana
40
41#endif // !BOOST_HANA_DETAIL_VARIADIC_REVERSE_APPLY_FLAT_HPP
42

source code of boost/libs/hana/include/boost/hana/detail/variadic/reverse_apply/flat.hpp