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