Perl provides the $- and $+ @- and @+ arrays for this purpose (thanks to kcott pointing out that arrays have the @ sigil...):
use warnings;
use strict;
# 1 2 3 4
# 0123456789012345678901234567890123456789012345678
my $dna = 'xxxxxxpecbcbccrlxxxxxxpeeeerlxxxxxplxxxxxPeRLxxxx';
my $re = qr/p.*?l/i;
while ( $dna =~ m[($re)]g ) {
print join " " => $1, $-[0], $+[0]-1, $/;
}
A correction of -1 is required, otherwise the matches are too long by one as in your code above.
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