use strict;
my $str = 'The next answer has to match the following strings:
PPCG
^P
^[P^]P
[^?][PG]$
(?<!\\\\..)(?!]).$
^[\\w^]*$|!|]P|G]\\$$
!|[^?]P(CG|G..)?$
[^])]\\$|^\\^?P|P.\\].$
([.$?]|G\\])\\$$|^\\^?P|\\]P$
([P.$?]\\$|[]^]P|G\\]\\$|CG)$
!|((G.|P|\\.)\\$|[^?]P|CG)$
^[(!P]|G..$|]..\\||[^?]P$
^.{3,23}[.-~]..\\$$|[^P?][PG]$
And fail on these strings:
[PPCG]
^[P\\^]
[^\\]]$
^\\^?P
[^?][PG]$|<|PG
^[^\\\\|]*(\\\\\\\\)+[^\\\\|]*[^\\]]$
^(.{,4}|.{9}|.{16,19}|.{5}P)$
^[^?]*[PG]$|[?$].*\\$$
^[^[]P|]P|(G]|[.])\\$$
\\..$|!|\\|G|^[\\^P]P|P\\^|G.\\$$
...\\^.P|^!|G]\\$$|w|<!|^\\^?P
([^\\\\}<]{3}|][^]]|^).?[$PG]$';
my $regex = qr/([^\\}<]{3}|][^]]|^).?[$PG]$/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