projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*! |
| 2 | @file | |
| 3 | Defines `boost::hana::is_a` and `boost::hana::is_an`. | |
| 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_CORE_IS_A_HPP | |
| 11 | #define BOOST_HANA_CORE_IS_A_HPP | |
| 12 | ||
| 13 | #include <boost/hana/fwd/core/is_a.hpp> | |
| 14 | ||
| 15 | #include <boost/hana/bool.hpp> | |
| 16 | #include <boost/hana/config.hpp> | |
| 17 | #include <boost/hana/core/tag_of.hpp> | |
| 18 | ||
| 19 | #include <type_traits> | |
| 20 | ||
| 21 | ||
| 22 | BOOST_HANA_NAMESPACE_BEGIN | |
| 23 | ////////////////////////////////////////////////////////////////////////// | |
| 24 | // is_a | |
| 25 | ////////////////////////////////////////////////////////////////////////// | |
| 26 | template <typename DataType, typename T> | |
| 27 | struct is_a_t<DataType, T> | |
| 28 | : integral_constant<bool, | |
| 29 | std::is_same<DataType, typename hana::tag_of<T>::type>::value | |
| 30 | > | |
| 31 | { }; | |
| 32 | ||
| 33 | template <typename DataType> | |
| 34 | struct is_a_t<DataType> { | |
| 35 | template <typename T> | |
| 36 | constexpr auto operator()(T const&) const | |
| 37 | { return hana::is_a<DataType, T>; } | |
| 38 | }; | |
| 39 | BOOST_HANA_NAMESPACE_END | |
| 40 | ||
| 41 | #endif // !BOOST_HANA_CORE_IS_A_HPP |