references.hpp

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/*****************************************************************************
** Ifdefs
*****************************************************************************/
 
#ifndef ECL_UTILITIES_REFERENCE_WRAPPER_HPP_
#define ECL_UTILITIES_REFERENCE_WRAPPER_HPP_
 
/*****************************************************************************
** Includes
*****************************************************************************/
 
#include <ecl/mpl/bool.hpp>
 
/*****************************************************************************
** Wrappers
*****************************************************************************/
 
namespace ecl {
 
template <typename T>
T* addressOf( T & v ) {
    return reinterpret_cast<T*>(
        &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
}
template<typename T>
class ReferenceWrapper {
 
public:
    typedef T type; 
    ReferenceWrapper(T& t): obj_ptr(addressOf(t)) {}
 
    virtual ~ReferenceWrapper() {}
 
    operator T& () const { return *obj_ptr; }
 
    T& reference() const { return *obj_ptr; }
 
    T* pointer() const { return *obj_ptr; }
 
private:
    T* obj_ptr;
};
 
/*****************************************************************************
** Utility Functions
*****************************************************************************/
 
template <typename T>
ReferenceWrapper<T> ref(T &wrapped_object) {
        return ReferenceWrapper<T>(wrapped_object);
}
 
template <typename T>
ReferenceWrapper<T const> cref(T const &wrapped_object) {
        return ReferenceWrapper<T const>(wrapped_object);
}
 
template <typename T>
class is_reference_wrapper : public False {};
 
template <typename T>
class is_reference_wrapper< ReferenceWrapper<T> > : public True {};
 
} // namespace ecl
 
 
#endif /* ECL_UTILITIES_REFERENCE_WRAPPER_HPP_ */