use strict;
my $str = 'Now we are looking for the pattern of a capital "C" followed by the letters "at" repeated two or more times.
This pattern will not match "Cat" since the "at" is not repeated.
It will match the first five letters of "Catatonic" since that fits our pattern.
It will not match "catatonic" because the "c" is not capitalized.';
my $regex = qr/C(at){2,}/p;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html