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