Re: [boost] [boostcon][proto] Suggestion for LIAW session: fixed-pointnumbers

Subject: Re: [boost] [boostcon][proto] Suggestion for LIAW session: fixed-pointnumbers
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2011-03-16 02:17:13

On 16/03/11 05:10, Gruenke, Matt wrote:
>
> I'm not sure we're talking about the same thing, here.  The template parameters of the results returned by my operators were determined by those of the operands.  For instance, 8.16 + 8.8 would return a 9.16.  If the result is then stored into a 16.8, then a right-shift of 8 bits is performed as part of the assignment.  In the case of 0.16 * 8.8, the result is 8.24.
>
> So, the only thing you have to think about is whether you need to force a conversion in the middle of an complex expression to avoid running out of range.  But that can easily be managed by breaking up complex expressions into smaller, simpler ones.
>

I think the idea was to use proto to actually look at the whoel 
expression as a whole and figure out the needed bit storage directly 
then work within it