[boost] Re: Re: proposal: safe arithmetic class

From: Thorsten Ottosen (nesotto_at_[hidden])
Date: 2003-01-16 11:16:03

<Bjorn.Karlsson_at_[hidden]> wrote in message
news:3D8559AE95B4D611B02C0002557C6C8B3C45CC_at_STH-EXCH...
> > From: David Abrahams [mailto:dave_at_[hidden]]
> >
> > The huge advantage appears when you start looking at arithmetic
> > expressions.  The result of
> >
> > if (t < u)
> > {
> >     x = y + z * w;
> > }
> >
> > could be a lot more predictable if we were working with types that
> > didn't perform implicit lossy conversions.
>
> In some cases, sure. But without some exceptionally creative use of
> expression templates, you'd have a situation where the ordering of
variables
> determine the validity of the expression

Sorry for not understanding why "exceptionally creative use of expression
templates" is necessary :-) Could you
elaborate a little on it?

regards

Thorsten