sl@0: // (C) Copyright Jonathan Turkanis 2003.
sl@0: // Distributed under the Boost Software License, Version 1.0. (See accompanying
sl@0: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
sl@0: 
sl@0: // See http://www.boost.org/libs/iostreams for documentation.
sl@0: 
sl@0: #ifndef BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED
sl@0: #define BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED
sl@0: 
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: #include <boost/mpl/not.hpp>
sl@0: #include <boost/type_traits/is_base_and_derived.hpp>
sl@0: 
sl@0: namespace boost { namespace iostreams {
sl@0: 
sl@0: template<typename T>
sl@0: struct operations;
sl@0: 
sl@0: namespace detail {
sl@0: 
sl@0: struct custom_tag { };
sl@0: 
sl@0: template<typename T>
sl@0: struct is_custom
sl@0:     : mpl::not_<
sl@0:           is_base_and_derived< custom_tag, operations<T> >
sl@0:       >
sl@0:     { };
sl@0: 
sl@0: } // End namespace detail.
sl@0: 
sl@0: template<typename T>
sl@0: struct operations : detail::custom_tag { };
sl@0: 
sl@0: } } // End namespaces iostreams, boost.
sl@0: 
sl@0: #endif // #ifndef BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED //--------------//