ceph/src/boost/libs/hana/include/boost/hana/detail/create.hpp

   1 /*!
   2 @file
   3 Defines `boost::hana::detail::create`.
   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_CREATE_HPP
  11 #define BOOST_HANA_DETAIL_CREATE_HPP
  12
  13 #include <boost/hana/config.hpp>
  14 #include <boost/hana/detail/decay.hpp>
  15
  16
  17 BOOST_HANA_NAMESPACE_BEGIN namespace detail {
  18     //! @ingroup group-details
  19     //! Implementation of the generic `std::make_xxx` pattern for arbitrary
  20     //! `xxx`s.
  21     template <template <typename ...> class T>
  22     struct create {
  23         template <typename ...X>
  24         constexpr T<typename detail::decay<X>::type...>
  25         operator()(X&& ...x) const {
  26             return T<typename detail::decay<X>::type...>{
  27                 static_cast<X&&>(x)...
  28             };
  29         }
  30     };
  31 } BOOST_HANA_NAMESPACE_END
  32
  33 #endif // !BOOST_HANA_DETAIL_CREATE_HPP