Re: [Boost-users] [Regex] Which sub-expression did participate in apartial match?

In the first case I would expect the output of the sub-expression and the position of the match. Are you aware of any method to achieve this behavior?

You do get marked sub-expression positions in partial matches, *but only if the sub-expression was completely matched*. Obviously that is not the case here I'm afraid. John. ps, (*it).position() in your code should be (*it).position(i).