Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   formatters/format.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   15.11.2012
Chris@16:  *
Chris@16:  * The header contains a generic log record formatter function.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <string>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/phoenix/core/actor.hpp>
Chris@16: #include <boost/phoenix/core/terminal_fwd.hpp>
Chris@16: #include <boost/phoenix/core/is_nullary.hpp>
Chris@16: #include <boost/phoenix/core/environment.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/at_c.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/detail/format.hpp>
Chris@16: #include <boost/log/detail/custom_terminal_spec.hpp>
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace expressions {
Chris@16: 
Chris@16: /*!
Chris@16:  * \brief Template expressions terminal node with Boost.Format-like formatter
Chris@16:  */
Chris@16: template< typename CharT >
Chris@16: class format_terminal
Chris@16: {
Chris@16: public:
Chris@16:     //! Internal typedef for type categorization
Chris@16:     typedef void _is_boost_log_terminal;
Chris@16: 
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! Boost.Format formatter type
Chris@16:     typedef boost::log::aux::basic_format< char_type > format_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16: 
Chris@16:     //! Terminal result type
Chris@16:     typedef typename format_type::pump result_type;
Chris@16: 
Chris@16: private:
Chris@16:     //! Formatter object
Chris@16:     mutable format_type m_format;
Chris@16: 
Chris@16: public:
Chris@16:     //! Initializing constructor
Chris@16:     explicit format_terminal(const char_type* format) : m_format(format) {}
Chris@16: 
Chris@16:     //! Invokation operator
Chris@16:     template< typename ContextT >
Chris@16:     result_type operator() (ContextT const& ctx) const
Chris@16:     {
Chris@16:         return m_format.make_pump(fusion::at_c< 1 >(phoenix::env(ctx).args()));
Chris@16:     }
Chris@16: 
Chris@16:     BOOST_DELETED_FUNCTION(format_terminal())
Chris@16: };
Chris@16: 
Chris@16: /*!
Chris@16:  * The function generates a terminal node in a template expression. The node will perform log record formatting
Chris@16:  * according to the provided format string.
Chris@16:  */
Chris@16: template< typename CharT >
Chris@16: BOOST_FORCEINLINE phoenix::actor< format_terminal< CharT > > format(const CharT* fmt)
Chris@16: {
Chris@16:     typedef format_terminal< CharT > terminal_type;
Chris@16:     phoenix::actor< terminal_type > act = {{ terminal_type(fmt) }};
Chris@16:     return act;
Chris@16: }
Chris@16: 
Chris@16: /*!
Chris@16:  * The function generates a terminal node in a template expression. The node will perform log record formatting
Chris@16:  * according to the provided format string.
Chris@16:  */
Chris@16: template< typename CharT, typename TraitsT, typename AllocatorT >
Chris@16: BOOST_FORCEINLINE phoenix::actor< format_terminal< CharT > > format(std::basic_string< CharT, TraitsT, AllocatorT > const& fmt)
Chris@16: {
Chris@16:     typedef format_terminal< CharT > terminal_type;
Chris@16:     phoenix::actor< terminal_type > act = {{ terminal_type(fmt.c_str()) }};
Chris@16:     return act;
Chris@16: }
Chris@16: 
Chris@16: } // namespace expressions
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: #ifndef BOOST_LOG_DOXYGEN_PASS
Chris@16: 
Chris@16: namespace phoenix {
Chris@16: 
Chris@16: namespace result_of {
Chris@16: 
Chris@16: template< typename CharT >
Chris@16: struct is_nullary< custom_terminal< boost::log::expressions::format_terminal< CharT > > > :
Chris@16:     public mpl::false_
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: } // namespace result_of
Chris@16: 
Chris@16: } // namespace phoenix
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_