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Diffstat (limited to 'boost/hana/detail/wrong.hpp')
| -rw-r--r-- | boost/hana/detail/wrong.hpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/boost/hana/detail/wrong.hpp b/boost/hana/detail/wrong.hpp new file mode 100644 index 0000000000..99ca630dd1 --- /dev/null +++ b/boost/hana/detail/wrong.hpp @@ -0,0 +1,33 @@ +/*! +@file +Defines `boost::hana::detail::wrong`. + +@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_DETAIL_WRONG_HPP +#define BOOST_HANA_DETAIL_WRONG_HPP + +#include <boost/hana/config.hpp> + +#include <type_traits> + + +BOOST_HANA_NAMESPACE_BEGIN namespace detail { + //! @ingroup group-detail + //! Equivalent to a type-dependent `std::false_type`. + //! + //! This is useful for making a static assertion that would otherwise + //! always fire up dependent on some template parameters. + //! + //! + //! Example + //! ------- + //! @include example/detail/wrong.cpp + template <typename ...> + struct wrong : std::false_type { }; +} BOOST_HANA_NAMESPACE_END + +#endif // !BOOST_HANA_DETAIL_WRONG_HPP |