Re: [boost] Bounded types

From: Robert Kawulak (kawulak_at_[hidden])
Date: 2005-10-20 16:09:58

Hi, 

> From: Neal Becker
<...>
> I'm more
> interested in bound specified at runtime.  I believe (without 
> proof) that
> for many applications there will be little performance 
> difference.  I say
> this because I'm expecting in many (most?) cases the actual 
> integral values
> will be known to the compiler.
> 
> Has any thought been given to adding this?  Or, perhaps even 
> making this the
> default bounded_int, (wrapping_int, etc.) type?

Yes, I'm still thinking about this. The difference between static and
run-time bounds is that in the latter case a bounded object needs to store
the bounds which makes its size at least 3 times bigger. Another one is that
with static bounds many checking operations may be optimised-away or at
least inlined. Therefore I'd rather not make run-time bounds the default.
I'm working on this as an optional feature, but this is a little bit harder
than it seems to unite the two concepts.

Best regards,
Robert