From: David Abrahams (dave_at_[hidden])
Date: 2005-01-10 10:30:12
Ben Hutchings wrote:
> Well the first attempt doesn't solve the problem because it requires an
> extra parameter. The second attempt solves it but I don't think you're
> supposed to make use of other templates.
Any solutions is allowable, though that one is not particularly elegant.
> I think the expected solution
> would be more like this:
>
> template<typename T>
> struct add_const_ref
> {
> typename T const & type;
> };
>
> template<typename T>
> struct add_const_ref<T &>
> {
> typename T & type;
> };
Actually there's a much more concise solution using the type traits
library. That is, after all, the focus of the chapter.
-- Dave Abrahams Boost Consulting http://www.boost-consulting.com