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1 | /*! |
2 | @file | |
3 | Defines `boost::hana::detail::wrong`. | |
4 | ||
5 | @copyright Louis Dionne 2013-2016 | |
6 | Distributed under the Boost Software License, Version 1.0. | |
7 | (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
8 | */ | |
9 | ||
10 | #ifndef BOOST_HANA_DETAIL_WRONG_HPP | |
11 | #define BOOST_HANA_DETAIL_WRONG_HPP | |
12 | ||
13 | #include <boost/hana/config.hpp> | |
14 | ||
15 | #include <type_traits> | |
16 | ||
17 | ||
18 | BOOST_HANA_NAMESPACE_BEGIN namespace detail { | |
19 | //! @ingroup group-detail | |
20 | //! Equivalent to a type-dependent `std::false_type`. | |
21 | //! | |
22 | //! This is useful for making a static assertion that would otherwise | |
23 | //! always fire up dependent on some template parameters. | |
24 | //! | |
25 | //! | |
26 | //! Example | |
27 | //! ------- | |
28 | //! @include example/detail/wrong.cpp | |
29 | template <typename ...> | |
30 | struct wrong : std::false_type { }; | |
31 | } BOOST_HANA_NAMESPACE_END | |
32 | ||
33 | #endif // !BOOST_HANA_DETAIL_WRONG_HPP |