58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file is_ostream.hpp
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* \author Andrey Semashev
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* \date 05.07.2015
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*
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* \brief This header is the Boost.Log library implementation, see the library documentation
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* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. In this file
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* internal configuration macros are defined.
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*/
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#ifndef BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_
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#include <iosfwd>
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#include <boost/type_traits/is_base_of.hpp>
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#include <boost/type_traits/has_left_shift.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/utility/formatting_ostream_fwd.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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template< typename T >
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struct is_ostream
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{
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static BOOST_CONSTEXPR_OR_CONST bool value = is_base_of< std::ios_base, T >::value && has_left_shift< T, int >::value;
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};
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template< typename CharT, typename TraitsT, typename AllocatorT >
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struct is_ostream< basic_formatting_ostream< CharT, TraitsT, AllocatorT > >
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{
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static BOOST_CONSTEXPR_OR_CONST bool value = true;
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_DETAIL_IS_OSTREAM_HPP_INCLUDED_
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