[ceph.git] / ceph / src / boost / libs / hana / include / boost / hana / detail / wrong.hpp

/*!
@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
Commit	Line	Data
7c673cae FG	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