Capture offset of matches in std.regex.matchAll?

[Lewis]

On Monday, 7 July 2014 at 21:32:30 UTC, JD wrote:
> I'm using a compile time regex to find some tags in an input
> string. Is it possible to capture the offset of the matches in
> some way? Otherwise I have to "calculate" the offsets myself by
> iterating over the results of matchAll.
>
> Thanks,
> Jeroen
>

For anyone coming to this later, I believe the capture strings 
are all slices. So you can do 'capture[1].ptr - 
originalString.ptr' to get the index the capture starts at.