Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2005-2007 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #ifndef PHOENIX_DETAIL_LOCAL_REFERENCE_HPP
Chris@16: #define PHOENIX_DETAIL_LOCAL_REFERENCE_HPP
Chris@16: 
Chris@16: #include <boost/utility/addressof.hpp>
Chris@16: 
Chris@16: namespace boost { namespace phoenix { namespace detail
Chris@16: {
Chris@16:     template <typename T>
Chris@16:     struct local_reference
Chris@16:     { 
Chris@16:         typedef T type;
Chris@16:     
Chris@16:         explicit local_reference(T& t): t_(boost::addressof(t)) {}
Chris@16:         operator T& () const { return *t_; }
Chris@16:         local_reference& operator=(T const& x) { *t_ = x; return *this; }
Chris@16:         local_reference const& operator=(T const& x) const { *t_ = x; return *this; }
Chris@16:         T& get() const { return *t_; }
Chris@16:         T* get_pointer() const { return t_; }
Chris@16:     
Chris@16:     private:
Chris@16:     
Chris@16:         T* t_;
Chris@16:     };
Chris@16:     
Chris@16:     template <typename T>
Chris@16:     struct unwrap_local_reference
Chris@16:     {
Chris@16:         typedef T type; // T should be a reference
Chris@16:     };
Chris@16: 
Chris@16:     template <typename T>
Chris@16:     struct unwrap_local_reference<local_reference<T> >
Chris@16:     {
Chris@16:         typedef T type; // unwrap the reference; T is a value
Chris@16:     };
Chris@16: }}}
Chris@16: 
Chris@16: #endif