text: /*
   *          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   bind.hpp
   * \author Andrey Semashev
   * \date   30.03.2008
   *
   * This header contains function object adapters.
   * This is a lightweight alternative to what Boost.Phoenix and Boost.Bind provides.
   */
  
  #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
  #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
  
  #include <boost/type_traits/remove_cv.hpp>
  #include <boost/log/detail/config.hpp>
  #include <boost/log/detail/header.hpp>
  
  #ifdef BOOST_HAS_PRAGMA_ONCE
  #pragma once
  #endif
  
  namespace boost {
  
  BOOST_LOG_OPEN_NAMESPACE
  
  namespace aux {
  
  template< typename T >
  struct make_arg_type
  {
      typedef T const& type;
  };
  
  template< typename T >
  struct make_arg_type< T& >
  {
      typedef T& type;
  };
  
  } // namespace aux
  
  //! First argument binder
  template< typename FunT, typename FirstArgT >
  struct binder1st :
      private FunT
  {
      typedef typename FunT::result_type result_type;
  
      binder1st(FunT const& fun, typename aux::make_arg_type< FirstArgT >::type arg) : FunT(fun), m_arg(arg) {}
  
      result_type operator() () const
      {
          return FunT::operator()(m_arg);
      }
  
      template< typename T0 >
      result_type operator() (T0 const& arg0) const
      {
          return FunT::operator()(m_arg, arg0);
      }
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return FunT::operator()(m_arg, arg0, arg1);
      }
  
  private:
      FirstArgT m_arg;
  };
  
  //! First argument binder
  template< typename FunT, typename FirstArgT >
  struct binder1st< FunT&, FirstArgT >
  {
      typedef typename remove_cv< FunT >::type::result_type result_type;
  
      binder1st(FunT& fun, typename aux::make_arg_type< FirstArgT >::type arg) : m_fun(fun), m_arg(arg) {}
  
      result_type operator() () const
      {
          return m_fun(m_arg);
      }
  
      template< typename T0 >
      result_type operator() (T0 const& arg0) const
      {
          return m_fun(m_arg, arg0);
      }
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return m_fun(m_arg, arg0, arg1);
      }
  
  private:
      FunT& m_fun;
      FirstArgT m_arg;
  };
  
  template< typename FunT, typename FirstArgT >
  BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT const& arg)
  {
      return binder1st< FunT, FirstArgT >(fun, arg);
  }
  
  template< typename FunT, typename FirstArgT >
  BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT& arg)
  {
      return binder1st< FunT, FirstArgT >(fun, arg);
  }
  
  //! Second argument binder
  template< typename FunT, typename SecondArgT >
  struct binder2nd :
      private FunT
  {
      typedef typename FunT::result_type result_type;
  
      binder2nd(FunT const& fun, typename aux::make_arg_type< SecondArgT >::type arg) : FunT(fun), m_arg(arg) {}
  
      template< typename T >
      result_type operator() (T const& arg) const
      {
          return FunT::operator()(arg, m_arg);
      }
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return FunT::operator()(arg0, m_arg, arg1);
      }
  
  private:
      SecondArgT m_arg;
  };
  
  //! Second argument binder
  template< typename FunT, typename SecondArgT >
  struct binder2nd< FunT&, SecondArgT >
  {
      typedef typename remove_cv< FunT >::type::result_type result_type;
  
      binder2nd(FunT& fun, typename aux::make_arg_type< SecondArgT >::type arg) : m_fun(fun), m_arg(arg) {}
  
      template< typename T >
      result_type operator() (T const& arg) const
      {
          return m_fun(arg, m_arg);
      }
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return m_fun(arg0, m_arg, arg1);
      }
  
  private:
      FunT& m_fun;
      SecondArgT m_arg;
  };
  
  template< typename FunT, typename SecondArgT >
  BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT const& arg)
  {
      return binder2nd< FunT, SecondArgT >(fun, arg);
  }
  
  template< typename FunT, typename SecondArgT >
  BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT& arg)
  {
      return binder2nd< FunT, SecondArgT >(fun, arg);
  }
  
  //! Third argument binder
  template< typename FunT, typename ThirdArgT >
  struct binder3rd :
      private FunT
  {
      typedef typename FunT::result_type result_type;
  
      binder3rd(FunT const& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : FunT(fun), m_arg(arg) {}
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return FunT::operator()(arg0, arg1, m_arg);
      }
  
  private:
      ThirdArgT m_arg;
  };
  
  //! Third argument binder
  template< typename FunT, typename ThirdArgT >
  struct binder3rd< FunT&, ThirdArgT >
  {
      typedef typename remove_cv< FunT >::type::result_type result_type;
  
      binder3rd(FunT& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : m_fun(fun), m_arg(arg) {}
  
      template< typename T0, typename T1 >
      result_type operator() (T0 const& arg0, T1 const& arg1) const
      {
          return m_fun(arg0, arg1, m_arg);
      }
  
  private:
      FunT& m_fun;
      ThirdArgT m_arg;
  };
  
  template< typename FunT, typename ThirdArgT >
  BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT const& arg)
  {
      return binder3rd< FunT, ThirdArgT >(fun, arg);
  }
  
  template< typename FunT, typename ThirdArgT >
  BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT& arg)
  {
      return binder3rd< FunT, ThirdArgT >(fun, arg);
  }
  
  BOOST_LOG_CLOSE_NAMESPACE // namespace log
  
  } // namespace boost
  
  #include <boost/log/detail/footer.hpp>
  
  #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
  