Re: [boost] [typeof] is T registered?

From: Arkadiy Vertleyb (vertleyb_at_[hidden])
Date: 2006-02-07 06:44:52

"Andy Little" <andy_at_[hidden]> wrote

>     I am wondering if it is possible to add some functionality so user can
tell
> if a type is in the database of registered types during compilation. It
may be
> there already of course.
>
> template <typename T>
> struct  Func{
>     //one possible use case
>     typedef  typename boost::mpl::eval_if<
>         boost::is_typeof_registered<T>,    // true if T is registered
>         typeof_operation<T>, // use BOOST_TYPEOF
>         try_something_else<T>
>     >::type type;
>
> };
>
> Its not critical, but I thought it might be useful while libraries are
adding
> the typeof functionality. Also might help me in the  "[typeof] gcc and
typeof in
> function return type" thread.

Doesn't the workaround I provided help?

Regards,
Arkadiy