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- /*
- Copyright 2017 Glen Joseph Fernandes
- (glenjofe@gmail.com)
- Distributed under the Boost Software License,
- Version 1.0. (See accompanying file LICENSE_1_0.txt
- or copy at http://www.boost.org/LICENSE_1_0.txt)
- */
- #ifndef BOOST_TT_MAKE_VOID_HPP_INCLUDED
- #define BOOST_TT_MAKE_VOID_HPP_INCLUDED
- #include <boost/config.hpp>
- namespace boost {
- #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
- template<class...>
- struct make_void {
- typedef void type;
- };
- #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
- template<class... Ts>
- using void_t = typename make_void<Ts...>::type;
- #endif
- #else /* BOOST_NO_CXX11_VARIADIC_TEMPLATES */
- template<class = void,
- class = void,
- class = void,
- class = void,
- class = void>
- struct make_void {
- typedef void type;
- };
- #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
- template<class A = void,
- class B = void,
- class C = void,
- class D = void,
- class E = void>
- using void_t = typename make_void<A, B, C, D, E>::type;
- #endif
- #endif
- } /* boost */
- #endif
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