Re: [Boost-users] regex_search? Which subexpression smatch'ed?

From: John Maddock (john_at_[hidden])
Date: 2006-04-07 05:48:25

> Obviously easier said than done, but if the library can turn the
> appropriate m[index].matched to "true", then perhaps there could be
> another variable in the class to reflect the lowest index of the
> first group that is true.  I realize this gets more complicated
> because there can be multiple groups.

It's backtracking that gets you: each time the "lowest sub-expression set" 
gets updated you'd need to store a complete history of previous settings so 
you can backtrack out again.  However, now I think about that some more, I 
actually think it might be possible after all :-)

John.