use strict;
my $str = '1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
9971
9973
9977';
my $regex = qr/^((?=[6-9](?<1>){6}|)(?=[3-59](?<1>){3}|)(?=[258](?<1>){2}|)(?=[147](?<1>)|).)+$(?<!(?=(?<-1>.)+(?(1)^))\11(?=((?<=(?=(?=((?<-2>)(?=.*$((?<-2>\2)(?<3>)|){9}).)+(?(2)^))(?>(?<-1>)(.)(?<=((?<5-1>\1)|){9}^.*))*(?<2>.(?<=((?<5>)(?<-1>\1)|){9}((?<-1>\1){10}|())((?<2-1>)(?<-3>\3)|){9}(?<-9>(?<-1>))?(?<1>){10}(?<-3>)(?<-1>)(?<5>^.*)))+$(?!\9)(?(3)^)(?<=(?<-5>(?=(?<1>(?=.*$\5)|.)).)*){10}(\12)?()|){9}^.*).)*)(?<-13>){2}\13(?<-13>)^(?<-14>(?(14)|((?<2>(.)?))){10}(?<-15>))+(?<15>)(.)*|^1)/mp;
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