_forward.h

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// -*- C++ -*-
 
#ifndef _RWSTD_RW_FORWARD_INCLUDED
#  define _RWSTD_RW_FORWARD_INCLUDED
 
#  include <rw/_defs.h>
#  include <rw/_meta_ref.h>     // for __rw_remove_reference
 
 
_RWSTD_NAMESPACE (std) {
 
 
// 20.2.2, forward/move helpers:
 
template <class _TypeT>
struct identity
{
    typedef _TypeT  type;
 
    const type& operator() (const type& __x) const {
        return __x;
    }
};
 
#  define _RWSTD_IDENTITY(_TypeT)         _STD::identity<_TypeT>::type
 
 
#  if !defined _RWSTD_NO_RVALUE_REFERENCES
 
template <class _TypeT>
inline _TypeT&&
forward (typename identity<_TypeT>::type&& __x)
{
    return static_cast<_TypeT&&>(__x);
}
 
template <class _TypeT>
inline typename _RWSTD_REMOVE_REFERENCE(_TypeT)&&
move (_TypeT&& __x)
{
    return static_cast<typename __rw::__rw_remove_reference<_TypeT>::type&&>(__x);
}
 
#    define _RWSTD_FORWARD(_TypeT, __x)   _STD::forward<_TypeT> (__x)
#    define _RWSTD_MOVE(__x)              _STD::move (__x)
 
#  else   // no rvalue references
 
#    define _RWSTD_FORWARD(_TypeT, __x)   (__x)
#    define _RWSTD_MOVE(__x)              (__x)
 
#  endif   // !defined _RWSTD_NO_RVALUE_REFERENCES
 
 
}   // namespace std
 
 
#endif   // _RWSTD_RW_FORWARD_INCLUDED