42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
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/*!
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@file
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Defines `boost::hana::is_a` and `boost::hana::is_an`.
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Copyright Louis Dionne 2013-2022
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_HANA_CORE_IS_A_HPP
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#define BOOST_HANA_CORE_IS_A_HPP
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#include <boost/hana/fwd/core/is_a.hpp>
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#include <boost/hana/bool.hpp>
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#include <boost/hana/config.hpp>
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#include <boost/hana/core/tag_of.hpp>
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#include <type_traits>
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namespace boost { namespace hana {
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//////////////////////////////////////////////////////////////////////////
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// is_a
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//////////////////////////////////////////////////////////////////////////
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template <typename DataType, typename T>
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struct is_a_t<DataType, T>
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: integral_constant<bool,
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std::is_same<DataType, typename hana::tag_of<T>::type>::value
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>
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{ };
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template <typename DataType>
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struct is_a_t<DataType> {
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template <typename T>
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constexpr auto operator()(T const&) const
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{ return hana::is_a<DataType, T>; }
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};
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}} // end namespace boost::hana
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#endif // !BOOST_HANA_CORE_IS_A_HPP
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