Re: [options] Allow Var() and Mask() to be used together

[Dale Johannesen <dalej at apple dot com>]

On Apr 27, 2005, at 2:45 PM, DJ Delorie wrote:
> It's for grouping flags that have nothing to do with the target.
>
> The case I was considering was a group of warnings, where you want to
> quickly test to see if ANY of the warnings are enabled, but allow
> individual testing as well.  Having the warnings be bits sharing an
> int variable makes testing them as a group trivial.  This is in the
> context of the warning control project I'm working on, where we want
> to add fine grained control over warnings without sacrificing
> performance.

This is also handy for the optimization pragmas, where you want to
save and restore a group of flags on a per-function basis.   (My patch
for that keeps breaking because other people are changing the same
areas, so I'm going to wait for things to settle down.)