1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) 2 // (C) Copyright 2003-2007 Jonathan Turkanis 3 // Distributed under the Boost Software License, Version 1.0. (See accompanying 4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) 5 6 // See http://www.boost.org/libs/iostreams for documentation. 7 8 #ifndef BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED 9 #define BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED 10 11 #if defined(_MSC_VER) 12 # pragma once 13 #endif 14 15 #include <boost/mpl/not.hpp> 16 #include <boost/type_traits/is_base_and_derived.hpp> 17 18 namespace boost { namespace iostreams { 19 20 template<typename T> 21 struct operations; 22 23 namespace detail { 24 25 struct custom_tag { }; 26 27 template<typename T> 28 struct is_custom 29 : mpl::not_< 30 is_base_and_derived< custom_tag, operations<T> > 31 > 32 { }; 33 34 } // End namespace detail. 35 36 template<typename T> 37 struct operations : detail::custom_tag { }; 38 39 } } // End namespaces iostreams, boost. 40 41 #endif // #ifndef BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED //--------------// 42