projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*! |
| 2 | @file | |
| 3 | Defines `boost::hana::Sequence`. | |
| 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_CONCEPT_SEQUENCE_HPP | |
| 11 | #define BOOST_HANA_CONCEPT_SEQUENCE_HPP | |
| 12 | ||
| 13 | #include <boost/hana/fwd/concept/sequence.hpp> | |
| 14 | ||
| 15 | #include <boost/hana/config.hpp> | |
| 16 | #include <boost/hana/core/tag_of.hpp> | |
| 17 | #include <boost/hana/core/when.hpp> | |
| 18 | ||
| 19 | ||
| 20 | BOOST_HANA_NAMESPACE_BEGIN | |
| 21 | namespace detail { | |
| 22 | template <typename S, typename Tag = typename hana::tag_of<S>::type> | |
| 23 | struct sequence_dispatch { | |
| 24 | static constexpr bool value = hana::Sequence<Tag>::value; | |
| 25 | }; | |
| 26 | ||
| 27 | template <typename S> | |
| 28 | struct sequence_dispatch<S, S> { | |
| 29 | static constexpr bool value = false; | |
| 30 | }; | |
| 31 | } | |
| 32 | ||
| 33 | //! @cond | |
| 34 | template <typename S, bool condition> | |
| 35 | struct Sequence<S, when<condition>> | |
| 36 | : detail::sequence_dispatch<S> | |
| 37 | { }; | |
| 38 | //! @endcond | |
| 39 | BOOST_HANA_NAMESPACE_END | |
| 40 | ||
| 41 | #endif // !BOOST_HANA_CONCEPT_SEQUENCE_HPP |