Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(BOOST_FUSION_SUPPORT_UNUSED_20070305_1038)
Chris@16: #define BOOST_FUSION_SUPPORT_UNUSED_20070305_1038
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <iosfwd>
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #if defined(BOOST_MSVC)
Chris@16: # pragma warning(push)
Chris@16: # pragma warning(disable: 4522) // multiple assignment operators specified warning
Chris@16: #endif
Chris@16: 
Chris@16: #define BOOST_FUSION_UNUSED_HAS_IO
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct unused_type
Chris@16:     {
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:         unused_type() BOOST_NOEXCEPT
Chris@16:         {
Chris@16:         }
Chris@16: 
Chris@16:         template <typename T>
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:         unused_type(T const&) BOOST_NOEXCEPT
Chris@16:         {
Chris@16:         }
Chris@16: 
Chris@16:         template <typename T>
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         unused_type const&
Chris@101:         operator=(T const&) const BOOST_NOEXCEPT
Chris@16:         {
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         template <typename T>
Chris@101:         BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         unused_type&
Chris@101:         operator=(T const&) BOOST_NOEXCEPT
Chris@16:         {
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         unused_type const&
Chris@101:         operator=(unused_type const&) const BOOST_NOEXCEPT
Chris@16:         {
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@101:         BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         unused_type&
Chris@101:         operator=(unused_type const&) BOOST_NOEXCEPT
Chris@16:         {
Chris@16:             return *this;
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@101:     BOOST_CONSTEXPR unused_type const unused = unused_type();
Chris@16: 
Chris@16:     namespace detail
Chris@16:     {
Chris@16:         struct unused_only
Chris@16:         {
Chris@101:             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@101:             unused_only(unused_type const&) BOOST_NOEXCEPT {}
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@101:     BOOST_CONSTEXPR
Chris@101:     inline std::ostream& operator<<(std::ostream& out, detail::unused_only const&) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return out;
Chris@16:     }
Chris@16: 
Chris@101:     BOOST_CONSTEXPR
Chris@101:     inline std::istream& operator>>(std::istream& in, unused_type&) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return in;
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #if defined(BOOST_MSVC)
Chris@16: # pragma warning(pop)
Chris@16: #endif
Chris@16: 
Chris@16: #endif