To start, I assume the regex you meant was

/(a(bc?)?)/g

because yours as posted doesn't match 'ab', though it does match 'ac'. Forgive me if I'm misinterpreting. I came up with what's below, but I'm not at all sure it works in the general case. You can play with it. It gives your desired output, using my regex. It saves a possible match, then fails the regex on purpose to start backtracking to get all the possible matches.

use strict;
use warnings;

my $test = 'abc';
my @matches;

$test =~ /(a(bc?)?)(??{push @matches, $^N})(?!)/;
print "@matches\n";

[download]
If you can generate the regexes, it would probably be easier just to generate separate regexes.

In reply to Re: Regex Subexpressions by chester
in thread Regex Subexpressions by BenjiSmith

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