[boost] Re: boost::lazy_operators ???

From: Daniel Frey (d.frey_at_[hidden])
Date: 2005-04-16 13:53:57

Sascha Seewald wrote:
> i wonder if it would be possible to support lazy evaluation in
> boost::operators.
> 
> we could provide "lazy" operator class templates and combine them with the
> "normal" operator class templates.
> 
> example: 
> 
> class point    
>     : boost::addable< point<T>               // point + point (normal)
>     , boost::subtractable< point<T>          // point - point (normal)
>     , boost::lazy_dividable2< point<T>, T    // point / T (lazy)
>     , boost::lazy_multipliable2< point<T>, T // point * T, T * point (lazy)
>       > > > >
> {
> ...
> }
> 
> what do you think?

I think I don't really understand what you are proposing. Can you 
provide a use case (preferably small but complete example) what exactly 
a lazy operator should do and why we need it?

Regards, Daniel