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