1 // 2 // detail/function.hpp 3 // ~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See accompanying 8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9 // 10 11 #ifndef BOOST_ASIO_DETAIL_FUNCTION_HPP 12 #define BOOST_ASIO_DETAIL_FUNCTION_HPP 13 14 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 15 # pragma once 16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 17 18 #include <boost/asio/detail/config.hpp> 19 20 #if defined(BOOST_ASIO_HAS_STD_FUNCTION) 21 # include <functional> 22 #else // defined(BOOST_ASIO_HAS_STD_FUNCTION) 23 # include <boost/function.hpp> 24 #endif // defined(BOOST_ASIO_HAS_STD_FUNCTION) 25 26 namespace boost { 27 namespace asio { 28 namespace detail { 29 30 #if defined(BOOST_ASIO_HAS_STD_FUNCTION) 31 using std::function; 32 #else // defined(BOOST_ASIO_HAS_STD_FUNCTION) 33 using boost::function; 34 #endif // defined(BOOST_ASIO_HAS_STD_FUNCTION) 35 36 } // namespace detail 37 } // namespace asio 38 } // namespace boost 39 40 #endif // BOOST_ASIO_DETAIL_FUNCTION_HPP 41