ceph/src/boost/boost/mp11/detail/mp_void.hpp

   1 #ifndef BOOST_MP11_DETAIL_MP_VOID_HPP_INCLUDED
   2 #define BOOST_MP11_DETAIL_MP_VOID_HPP_INCLUDED
   3
   4 //  Copyright 2015-2017 Peter Dimov.
   5 //
   6 //  Distributed under the Boost Software License, Version 1.0.
   7 //
   8 //  See accompanying file LICENSE_1_0.txt or copy at
   9 //  http://www.boost.org/LICENSE_1_0.txt
  10
  11 namespace boost
  12 {
  13 namespace mp11
  14 {
  15
  16 // mp_void<T...>
  17 namespace detail
  18 {
  19
  20 template<class... T> struct mp_void_impl
  21 {
  22     using type = void;
  23 };
  24
  25 } // namespace detail
  26
  27 template<class... T> using mp_void = typename detail::mp_void_impl<T...>::type;
  28
  29 } // namespace mp11
  30 } // namespace boost
  31
  32 #endif // #ifndef BOOST_MP11_DETAIL_MP_VOID_HPP_INCLUDED