boost/hana/core/is_a.hpp
/*! @file Defines `boost::hana::is_a` and `boost::hana::is_an`. @copyright Louis Dionne 2013-2017 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) */ #ifndef BOOST_HANA_CORE_IS_A_HPP #define BOOST_HANA_CORE_IS_A_HPP #include <boost/hana/fwd/core/is_a.hpp> #include <boost/hana/bool.hpp> #include <boost/hana/config.hpp> #include <boost/hana/core/tag_of.hpp> #include <type_traits> BOOST_HANA_NAMESPACE_BEGIN ////////////////////////////////////////////////////////////////////////// // is_a ////////////////////////////////////////////////////////////////////////// template <typename DataType, typename T> struct is_a_t<DataType, T> : integral_constant<bool, std::is_same<DataType, typename hana::tag_of<T>::type>::value > { }; template <typename DataType> struct is_a_t<DataType> { template <typename T> constexpr auto operator()(T const&) const { return hana::is_a<DataType, T>; } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_CORE_IS_A_HPP