ceph/src/boost/boost/fusion/container/generation/ignore.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001 Doug Gregor
   3     Copyright (c) 1999-2003 Jaakko Jarvi
   4     Copyright (c) 2001-2011 Joel de Guzman
   5
   6     Distributed under the Boost Software License, Version 1.0. (See accompanying
   7     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   8 ==============================================================================*/
   9 #if !defined(FUSION_IGNORE_07192005_0329)
  10 #define FUSION_IGNORE_07192005_0329
  11
  12 #include <boost/fusion/support/config.hpp>
  13
  14 namespace boost { namespace fusion
  15 {
  16     //  Swallows any assignment (by Doug Gregor)
  17     namespace detail
  18     {
  19         struct swallow_assign
  20         {
  21             template<typename T>
  22             BOOST_FUSION_CONSTEXPR_THIS BOOST_FUSION_GPU_ENABLED
  23             swallow_assign const&
  24             operator=(const T&) const
  25             {
  26                 return *this;
  27             }
  28         };
  29     }
  30
  31     //  "ignore" allows tuple positions to be ignored when using "tie".
  32     BOOST_CONSTEXPR_OR_CONST detail::swallow_assign ignore = detail::swallow_assign();
  33 }}
  34
  35 #endif