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Diffstat (limited to 'boost/hana/core/default.hpp')
| -rw-r--r-- | boost/hana/core/default.hpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/boost/hana/core/default.hpp b/boost/hana/core/default.hpp new file mode 100644 index 0000000000..a03ffbb79a --- /dev/null +++ b/boost/hana/core/default.hpp @@ -0,0 +1,32 @@ +/*! +@file +Defines `boost::hana::default_` and `boost::hana::is_default`. + +@copyright Louis Dionne 2013-2016 +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_DEFAULT_HPP +#define BOOST_HANA_CORE_DEFAULT_HPP + +#include <boost/hana/fwd/core/default.hpp> + +#include <boost/hana/config.hpp> + +#include <type_traits> + + +BOOST_HANA_NAMESPACE_BEGIN + template <typename Method, typename> + struct is_default : std::false_type { }; + + template <typename Method> + struct is_default<Method, decltype((void) + static_cast<default_>(*(Method*)0) + )> + : std::true_type + { }; +BOOST_HANA_NAMESPACE_END + +#endif // !BOOST_HANA_CORE_DEFAULT_HPP |