33 lines
782 B
C++
33 lines
782 B
C++
/*!
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@file
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Defines `boost::hana::default_` and `boost::hana::is_default`.
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@copyright Louis Dionne 2013-2017
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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_DEFAULT_HPP
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#define BOOST_HANA_CORE_DEFAULT_HPP
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#include <boost/hana/fwd/core/default.hpp>
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#include <boost/hana/config.hpp>
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#include <type_traits>
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namespace boost { namespace hana {
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template <typename Method, typename>
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struct is_default : std::false_type { };
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template <typename Method>
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struct is_default<Method, decltype((void)
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static_cast<default_>(*(Method*)0)
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)>
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: std::true_type
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{ };
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}} // end namespace boost::hana
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#endif // !BOOST_HANA_CORE_DEFAULT_HPP
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