iostreams/detail/enable_if_stream.hpp

0001 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
0002 // (C) Copyright 2003-2007 Jonathan Turkanis
0003 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
0005
0006 // See http://www.boost.org/libs/iostreams for documentation.
0007
0008 #ifndef BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED
0009 #define BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED
0010
0011 #if defined(_MSC_VER)
0012 # pragma once
0013 #endif
0014
0015 #include <boost/config.hpp>                // BOOST_NO_SFINAE.
0016 #include <boost/config/workaround.hpp>
0017 #include <boost/utility/enable_if.hpp>
0018 #include <boost/iostreams/traits_fwd.hpp>  // is_std_io.
0019
0020 #if !defined(BOOST_NO_SFINAE) && \
0021     !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x592))
0022 # define BOOST_IOSTREAMS_ENABLE_IF_STREAM(T) \
0023     , typename boost::enable_if< boost::iostreams::is_std_io<T> >::type* = 0 \
0024     /**/
0025 # define BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) \
0026     , typename boost::disable_if< boost::iostreams::is_std_io<T> >::type* = 0 \
0027     /**/
0028 #else
0029 # define BOOST_IOSTREAMS_ENABLE_IF_STREAM(T)
0030 # define BOOST_IOSTREAMS_DISABLE_IF_STREAM(T)
0031 #endif
0032
0033 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED