ceph/src/boost/libs/log/include/boost/log/detail/custom_terminal_spec.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   custom_terminal_spec.hpp
   9  * \author Andrey Semashev
  10  * \date   29.01.2012
  11  *
  12  * The header contains Boost.Phoenix custom terminal specialization for Boost.Log terminals.
  13  */
  14
  15 #ifndef BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_
  16 #define BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_
  17
  18 #include <boost/mpl/bool.hpp>
  19 #include <boost/phoenix/core/terminal_fwd.hpp>
  20 #include <boost/phoenix/core/is_nullary.hpp>
  21 #include <boost/phoenix/core/terminal.hpp> // needed for terminal-related part of the grammar
  22 #include <boost/type_traits/remove_cv.hpp>
  23 #include <boost/type_traits/remove_reference.hpp>
  24 #include <boost/utility/result_of.hpp>
  25 #include <boost/log/detail/config.hpp>
  26 #include <boost/log/detail/header.hpp>
  27
  28 #ifdef BOOST_HAS_PRAGMA_ONCE
  29 #pragma once
  30 #endif
  31
  32 namespace boost {
  33
  34 namespace phoenix {
  35
  36 template< typename T >
  37 struct is_custom_terminal< T, typename T::_is_boost_log_terminal > :
  38     public mpl::true_
  39 {
  40 };
  41
  42 template< typename T >
  43 struct custom_terminal< T, typename T::_is_boost_log_terminal >
  44 {
  45     typedef custom_terminal< T, typename T::_is_boost_log_terminal > this_type;
  46
  47     template< typename >
  48     struct result;
  49
  50     template< typename ThisT, typename TermT, typename ContextT >
  51     struct result< ThisT(TermT, ContextT) >
  52     {
  53         typedef typename remove_cv< typename remove_reference< TermT >::type >::type term;
  54         typedef typename boost::result_of< const term(ContextT) >::type type;
  55     };
  56
  57     template< typename ContextT >
  58     typename result< const this_type(T const&, ContextT&) >::type operator() (T const& term, ContextT& ctx) const
  59     {
  60         return term(ctx);
  61     }
  62 };
  63
  64 } // namespace phoenix
  65
  66 } // namespace boost
  67
  68 #include <boost/log/detail/footer.hpp>
  69
  70 #endif // BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_