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Diffstat (limited to 'boost/log/utility/functional/bind_to_log.hpp')
-rw-r--r-- | boost/log/utility/functional/bind_to_log.hpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/boost/log/utility/functional/bind_to_log.hpp b/boost/log/utility/functional/bind_to_log.hpp new file mode 100644 index 0000000000..9131d6658f --- /dev/null +++ b/boost/log/utility/functional/bind_to_log.hpp @@ -0,0 +1,76 @@ +/* + * Copyright Andrey Semashev 2007 - 2014. + * 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 bind_to_log.hpp + * \author Andrey Semashev + * \date 06.11.2012 + * + * This header contains a function object that puts the received value to the bound stream using the \c to_log manipulator. + * This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides. + */ + +#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ +#define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ + +#include <boost/log/detail/config.hpp> +#include <boost/log/utility/functional/bind.hpp> +#include <boost/log/utility/manipulators/to_log.hpp> +#include <boost/log/detail/header.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +namespace boost { + +BOOST_LOG_OPEN_NAMESPACE + +//! The function object that outputs its second operand to the first one +template< typename TagT = void > +struct to_log_fun +{ + typedef void result_type; + + template< typename StreamT, typename T > + void operator() (StreamT& strm, T const& val) const + { + strm << boost::log::to_log< TagT >(val); + } +}; + +//! The function object that outputs its second operand to the first one +template< > +struct to_log_fun< void > +{ + typedef void result_type; + + template< typename StreamT, typename T > + void operator() (StreamT& strm, T const& val) const + { + strm << boost::log::to_log(val); + } +}; + +template< typename StreamT > +BOOST_FORCEINLINE binder1st< to_log_fun< >, StreamT& > bind_to_log(StreamT& strm) +{ + return binder1st< to_log_fun< >, StreamT& >(to_log_fun< >(), strm); +} + +template< typename TagT, typename StreamT > +BOOST_FORCEINLINE binder1st< to_log_fun< TagT >, StreamT& > bind_to_log(StreamT& strm) +{ + return binder1st< to_log_fun< TagT >, StreamT& >(to_log_fun< TagT >(), strm); +} + +BOOST_LOG_CLOSE_NAMESPACE // namespace log + +} // namespace boost + +#include <boost/log/detail/footer.hpp> + +#endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ |