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Diffstat (limited to 'boost/type_traits/make_void.hpp')
-rw-r--r-- | boost/type_traits/make_void.hpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/boost/type_traits/make_void.hpp b/boost/type_traits/make_void.hpp new file mode 100644 index 0000000000..f48823b059 --- /dev/null +++ b/boost/type_traits/make_void.hpp @@ -0,0 +1,52 @@ +/* +Copyright 2017 Glen Joseph Fernandes +<glenjofe -at- 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 |