ceph/src/boost/libs/log/include/boost/log/utility/functional/bind_assign.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   bind_assign.hpp
   9  * \author Andrey Semashev
  10  * \date   30.03.2008
  11  *
  12  * This header contains a function object that assigns the received value to the bound object.
  13  * This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides.
  14  */
  15
  16 #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_ASSIGN_HPP_INCLUDED_
  17 #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_ASSIGN_HPP_INCLUDED_
  18
  19 #include <boost/log/detail/config.hpp>
  20 #include <boost/log/utility/functional/bind.hpp>
  21 #include <boost/log/detail/header.hpp>
  22
  23 #ifdef BOOST_HAS_PRAGMA_ONCE
  24 #pragma once
  25 #endif
  26
  27 namespace boost {
  28
  29 BOOST_LOG_OPEN_NAMESPACE
  30
  31 //! The function object that assigns its second operand to the first one
  32 struct assign_fun
  33 {
  34     typedef void result_type;
  35
  36     template< typename LeftT, typename RightT >
  37     void operator() (LeftT& assignee, RightT const& val) const
  38     {
  39         assignee = val;
  40     }
  41 };
  42
  43 template< typename AssigneeT >
  44 BOOST_FORCEINLINE binder1st< assign_fun, AssigneeT& > bind_assign(AssigneeT& assignee)
  45 {
  46     return binder1st< assign_fun, AssigneeT& >(assign_fun(), assignee);
  47 }
  48
  49 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  50
  51 } // namespace boost
  52
  53 #include <boost/log/detail/footer.hpp>
  54
  55 #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_ASSIGN_HPP_INCLUDED_