Chris@16: // Copyright 2008 Christophe Henry
Chris@16: // henry UNDERSCORE christophe AT hotmail DOT com
Chris@16: // This is an extended version of the state machine available in the boost::mpl library
Chris@16: // Distributed under the same license as the original.
Chris@16: // Copyright for the original version:
Chris@16: // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
Chris@16: // under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_MSM_BACK_BIND_HELPERS_H
Chris@16: #define BOOST_MSM_BACK_BIND_HELPERS_H
Chris@16: 
Chris@16: #include <functional>
Chris@16: 
Chris@16: namespace boost { namespace msm { namespace back
Chris@16: {
Chris@16:     // helper to replace std::plus as the lack of implicit conversion makes it not usable in one of our bind
Chris@16:     template<class _Ty,class _Tz>
Chris@16:     struct plus2
Chris@16:         : public std::binary_function<_Ty, _Tz, _Ty>
Chris@16:     {
Chris@16:         // functor for operator+
Chris@16:         _Ty operator()( _Ty _Left, _Tz _Right) const
Chris@16:         {
Chris@16:             // apply operator+ to operands
Chris@16:             return (_Left + _Right);
Chris@16:         }
Chris@16:     };
Chris@16:     // helper to dereference a pointer to a function pointer
Chris@16:     template <class T>
Chris@16:     struct deref 
Chris@16:     {
Chris@16:         typedef T& result_type;
Chris@16:         T& operator()(T*  f) const
Chris@16:         {
Chris@16:             return *f;
Chris@16:         }
Chris@16:     };
Chris@16: } } }//boost::msm::back
Chris@16: #endif //BOOST_MSM_BACK_BIND_HELPERS_H