ceph/src/boost/libs/context/include/boost/context/detail/exchange.hpp

   1
   2 //          Copyright Oliver Kowalke 2014.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 //    (See accompanying file LICENSE_1_0.txt or copy at
   5 //          http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_CONTEXT_DETAIL_EXCHANGE_H
   8 #define BOOST_CONTEXT_DETAIL_EXCHANGE_H
   9
  10 #include <algorithm>
  11 #include <utility>
  12
  13 #include <boost/config.hpp>
  14
  15 #ifdef BOOST_HAS_ABI_HEADERS
  16 # include BOOST_ABI_PREFIX
  17 #endif
  18
  19 namespace boost {
  20 namespace context {
  21 namespace detail {
  22
  23 template< typename T, typename U = T >
  24 T exchange( T & t, U && nv) {
  25     T ov = std::move( t);
  26     t = std::forward< U >( nv);
  27     return ov;
  28 }
  29
  30 }}}
  31
  32 #ifdef BOOST_HAS_ABI_HEADERS
  33 #include BOOST_ABI_SUFFIX
  34 #endif
  35
  36 #endif // BOOST_CONTEXT_DETAIL_EXCHANGE_H