[Patch, libstdc++/68863] Let lookahead regex use captured contents

[Tim Shen]

On Mon, Dec 14, 2015 at 3:00 AM, Jonathan Wakely <jwakely@redhat.com> wrote:
> I don't fully understand the patch, but it's OK for trunk, and if
> you're confident it's definitely correct and safe it's OK for the
> gcc-5 and gcc-4_9 branches too.
>
> Was it just completely wrong before, creating a vector of
> default-constructed match results, that were not matched?
>

Yes, that's the case. I'm not sure why I missed this. Perhaps all I
was focusing on is to get the captures in the lookahead sub-expression
out of it, so later user can use it; but I didn't think about the
other way around.

-- 
Regards,
Tim Shen