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1 | /*! |
2 | @file | |
3 | Defines `boost::hana::reverse_fold`. | |
4 | ||
5 | @copyright Louis Dionne 2013-2016 | |
6 | Distributed 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_REVERSE_FOLD_HPP | |
11 | #define BOOST_HANA_REVERSE_FOLD_HPP | |
12 | ||
13 | #include <boost/hana/fwd/reverse_fold.hpp> | |
14 | ||
15 | #include <boost/hana/config.hpp> | |
16 | #include <boost/hana/fold_right.hpp> | |
17 | #include <boost/hana/functional/flip.hpp> | |
18 | ||
19 | ||
20 | BOOST_HANA_NAMESPACE_BEGIN | |
21 | //! @cond | |
22 | template <typename Xs, typename S, typename F> | |
23 | constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, S&& s, F&& f) const { | |
24 | return hana::fold_right(static_cast<Xs&&>(xs), | |
25 | static_cast<S&&>(s), | |
26 | hana::flip(static_cast<F&&>(f))); | |
27 | } | |
28 | ||
29 | template <typename Xs, typename F> | |
30 | constexpr decltype(auto) reverse_fold_t::operator()(Xs&& xs, F&& f) const { | |
31 | return hana::fold_right(static_cast<Xs&&>(xs), | |
32 | hana::flip(static_cast<F&&>(f))); | |
33 | } | |
34 | //! @endcond | |
35 | BOOST_HANA_NAMESPACE_END | |
36 | ||
37 | #endif // !BOOST_HANA_REVERSE_FOLD_HPP |