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

From: Peder Holt (peder.holt_at_[hidden])
Date: 2006-02-07 05:04:07

On 2/7/06, Andy Little <andy_at_[hidden]> wrote:
> Hi to the typeof developers,
>
>     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.
>
>
> regards
> Andy Little
>

This was discussed here:
http://thread.gmane.org/gmane.comp.lib.boost.devel/125765

We never implemented this, as there was never any feedback that anyone
would use it.

Regards
Peder

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