in reply to Re: Find initial position of match iin regexp with variable span
in thread Find initial position of match iin regexp with variable span

Sorr for the code that doesnn't compile, I just build it on the run around the Regexp. Anyway, I found the solution. If:

my $position = pos($text);

finds the matching position at the END of the pattern

my $position = ($-[0]);

finds the matching position at the BEGINNING of the pattern.