[Boost-users] add_const_ref type transformation metafct

Subject: [Boost-users] add_const_ref type transformation metafct
From: Hicham Mouline (hicham_at_[hidden])
Date: 2009-04-04 07:06:37

Hello,

I wish to have a metafct that adds "const &" to types that have it or don't
have it...

template< typename T >
struct add_const_ref {
  typedef typename boost::remove_const<T>::type      t1;
  typedef typename boost::add_const<t1>::type        t2;
  typedef typename boost::add_reference<t2>::type    type;
};

Does this exist already in type traits or elsewhere? I couldn't find....
Can this be improved in terms of reducing the number of tmpl instantiations?

Note : add_const_ref< const double& >::type is  const double& for e.g.

Rds,