1 /*!
2 @file
3 Defines an equivalent to the proposed `std::void_t`.
4 
5 @copyright Louis Dionne 2013-2017
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_VOID_T_HPP
11 #define BOOST_HANA_DETAIL_VOID_T_HPP
12 
13 #include <boost/hana/config.hpp>
14 
15 
16 BOOST_HANA_NAMESPACE_BEGIN namespace detail {
17     template <typename ...>
18     using void_t = void;
19 } BOOST_HANA_NAMESPACE_END
20 
21 #endif // !BOOST_HANA_DETAIL_VOID_T_HPP
22