| 1 | /* |
|---|---|
| 2 | * Copyright Andrey Semashev 2007 - 2015. |
| 3 | * Distributed under the Boost Software License, Version 1.0. |
| 4 | * (See accompanying file LICENSE_1_0.txt or copy at |
| 5 | * http://www.boost.org/LICENSE_1_0.txt) |
| 6 | */ |
| 7 | /*! |
| 8 | * \file is_ostream.hpp |
| 9 | * \author Andrey Semashev |
| 10 | * \date 05.07.2015 |
| 11 | * |
| 12 | * \brief This header is the Boost.Log library implementation, see the library documentation |
| 13 | * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. In this file |
| 14 | * internal configuration macros are defined. |
| 15 | */ |
| 16 | |
| 17 | #ifndef BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_ |
| 18 | #define BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_ |
| 19 | |
| 20 | #include <iosfwd> |
| 21 | #include <boost/type_traits/is_base_of.hpp> |
| 22 | #include <boost/type_traits/has_left_shift.hpp> |
| 23 | #include <boost/log/detail/config.hpp> |
| 24 | #include <boost/log/utility/formatting_ostream_fwd.hpp> |
| 25 | #include <boost/log/detail/header.hpp> |
| 26 | |
| 27 | #ifdef BOOST_HAS_PRAGMA_ONCE |
| 28 | #pragma once |
| 29 | #endif |
| 30 | |
| 31 | namespace boost { |
| 32 | |
| 33 | BOOST_LOG_OPEN_NAMESPACE |
| 34 | |
| 35 | namespace aux { |
| 36 | |
| 37 | template< typename T > |
| 38 | struct is_ostream |
| 39 | { |
| 40 | static BOOST_CONSTEXPR_OR_CONST bool value = is_base_of< std::ios_base, T >::value && has_left_shift< T, int >::value; |
| 41 | }; |
| 42 | |
| 43 | template< typename CharT, typename TraitsT, typename AllocatorT > |
| 44 | struct is_ostream< basic_formatting_ostream< CharT, TraitsT, AllocatorT > > |
| 45 | { |
| 46 | static BOOST_CONSTEXPR_OR_CONST bool value = true; |
| 47 | }; |
| 48 | |
| 49 | } // namespace aux |
| 50 | |
| 51 | BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| 52 | |
| 53 | } // namespace boost |
| 54 | |
| 55 | #include <boost/log/detail/footer.hpp> |
| 56 | |
| 57 | #endif // BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_ |
| 58 |