]>
Commit | Line | Data |
---|---|---|
1 | /*! | |
2 | @file | |
3 | Defines `boost::hana::fuse`. | |
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_FUSE_HPP | |
11 | #define BOOST_HANA_FUSE_HPP | |
12 | ||
13 | #include <boost/hana/fwd/fuse.hpp> | |
14 | ||
15 | #include <boost/hana/config.hpp> | |
16 | #include <boost/hana/detail/decay.hpp> | |
17 | #include <boost/hana/unpack.hpp> | |
18 | ||
19 | ||
20 | BOOST_HANA_NAMESPACE_BEGIN | |
21 | namespace detail { | |
22 | template <typename F> | |
23 | struct fused { | |
24 | F f; | |
25 | template <typename Xs> | |
26 | constexpr decltype(auto) operator()(Xs&& xs) const& | |
27 | { return hana::unpack(static_cast<Xs&&>(xs), f); } | |
28 | ||
29 | template <typename Xs> | |
30 | constexpr decltype(auto) operator()(Xs&& xs) & | |
31 | { return hana::unpack(static_cast<Xs&&>(xs), f); } | |
32 | ||
33 | template <typename Xs> | |
34 | constexpr decltype(auto) operator()(Xs&& xs) && | |
35 | { return hana::unpack(static_cast<Xs&&>(xs), static_cast<F&&>(f)); } | |
36 | }; | |
37 | } | |
38 | ||
39 | //! @cond | |
40 | template <typename F> | |
41 | constexpr auto fuse_t::operator()(F&& f) const { | |
42 | return detail::fused<typename detail::decay<F>::type>{static_cast<F&&>(f)}; | |
43 | } | |
44 | //! @endcond | |
45 | BOOST_HANA_NAMESPACE_END | |
46 | ||
47 | #endif // !BOOST_HANA_FUSE_HPP |