ceph/src/boost/boost/log/utility/functional/as_action.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   as_action.hpp
   9  * \author Andrey Semashev
  10  * \date   30.03.2008
  11  *
  12  * This header contains function object adapter for compatibility with Boost.Spirit actions interface requirements.
  13  */
  14
  15 #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_AS_ACTION_HPP_INCLUDED_
  16 #define BOOST_LOG_UTILITY_FUNCTIONAL_AS_ACTION_HPP_INCLUDED_
  17
  18 #include <boost/log/detail/config.hpp>
  19 #include <boost/log/detail/header.hpp>
  20
  21 #ifdef BOOST_HAS_PRAGMA_ONCE
  22 #pragma once
  23 #endif
  24
  25 namespace boost {
  26
  27 BOOST_LOG_OPEN_NAMESPACE
  28
  29 //! Function object adapter for Boost.Spirit actions
  30 template< typename FunT >
  31 struct as_action_adapter
  32 {
  33     typedef typename FunT::result_type result_type;
  34
  35     BOOST_DEFAULTED_FUNCTION(as_action_adapter(), {})
  36     explicit as_action_adapter(FunT const& fun) : m_fun(fun) {}
  37
  38     template< typename AttributeT, typename ContextT >
  39     result_type operator() (AttributeT const& attr, ContextT const& ctx, bool& pass) const
  40     {
  41         return m_fun(attr);
  42     }
  43
  44 private:
  45     FunT m_fun;
  46 };
  47
  48 template< typename FunT >
  49 BOOST_FORCEINLINE as_action_adapter< FunT > as_action(FunT const& fun)
  50 {
  51     return as_action_adapter< FunT >(fun);
  52 }
  53
  54 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  55
  56 } // namespace boost
  57
  58 #include <boost/log/detail/footer.hpp>
  59
  60 #endif // BOOST_LOG_UTILITY_FUNCTIONAL_AS_ACTION_HPP_INCLUDED_