Re: [pcre-dev] (*THEN) works differently in Perl

And if we disregards Perl's bugs then it seems (*COMMIT) in Perl works in
a following manner:

1. Backtracking can't move to the left of COMMIT (this is PCRE behaviour
too)
2. If COMMIT occurs then no advance match to any other position of subject
can happen. No matter there are any other backtracking control verbs
occurs after COMMIT or COMMIT occurs in atomic group/negative lookaround
etc (this is not implemented by PCRE)