Re: [boost] [numeric_cast] request for boost::numeric_downcast

Subject: Re: [boost] [numeric_cast] request for boost::numeric_downcast
From: Fernando Cacciola (fernando.cacciola_at_[hidden])
Date: 2008-11-06 07:37:20

Hi Thorsten,
> Hi Fernando,
> 
> Amoung our utilities we have
> 
>   boost::polymorphic_cast
>   boost::polymorphic_downcast
> 
> The latter only performs a check in debug builds, and can  then be used 
> whenever the cast must succeed.
> 
Oh... I wasn't aware of _downcast.

> boost::numeric_cast has no such alternative. Therefore I wuold like to 
> see one. To keep in the naming convention from above, I think it could 
> be reasonable to call this
> 
>   boost::numeric_downcast
> 
> Furthermore, this should if possible be implemented in a seperate header 
> (which is included in the main header) that can be compiled without 
> exception-support. I think there are still platforms where they need 
> this functionality, but don't want to sue exceptions.
> 
Indeed.. it all makes sense.

I'll do it sometimes next week.

Best

Fernando