exchange.hpp 741 B

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