/*
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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 to_log.hpp
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* \author Andrey Semashev
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* \date 06.11.2012
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*
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* This header contains the \c to_log output manipulator.
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*/
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#ifndef BOOST_LOG_UTILITY_MANIPULATORS_TO_LOG_HPP_INCLUDED_
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#define BOOST_LOG_UTILITY_MANIPULATORS_TO_LOG_HPP_INCLUDED_
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#include <iosfwd>
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#include <boost/core/enable_if.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/is_ostream.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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/*!
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* \brief Generic manipulator for customizing output to log
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*/
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template< typename T, typename TagT = void >
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class to_log_manip
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{
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public:
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//! Output value type
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typedef T value_type;
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//! Value tag type
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typedef TagT tag_type;
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private:
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//! Reference to the value
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value_type const& m_value;
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public:
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explicit to_log_manip(value_type const& value) BOOST_NOEXCEPT : m_value(value) {}
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to_log_manip(to_log_manip const& that) BOOST_NOEXCEPT : m_value(that.m_value) {}
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value_type const& get() const BOOST_NOEXCEPT { return m_value; }
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};
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template< typename StreamT, typename T, typename TagT >
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inline typename enable_if_c< log::aux::is_ostream< StreamT >::value, StreamT& >::type operator<< (StreamT& strm, to_log_manip< T, TagT > manip)
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{
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strm << manip.get();
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return strm;
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}
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template< typename T >
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inline to_log_manip< T > to_log(T const& value) BOOST_NOEXCEPT
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{
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return to_log_manip< T >(value);
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}
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template< typename TagT, typename T >
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inline to_log_manip< T, TagT > to_log(T const& value) BOOST_NOEXCEPT
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{
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return to_log_manip< T, TagT >(value);
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}
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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_UTILITY_MANIPULATORS_TO_LOG_HPP_INCLUDED_
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