use strict;
my $str = 'Foo [bar] [1].
Foo [bar][1].
Foo [bar]
[1].
Foo [bar][]
[Foo\\]][]
Here\'s one where the [link
breaks][] across lines.';
my $regex = qr/(?<link_all>
(?<!\\)\[(?<link_name>.+?)(?<!\\)\]
[ ]?
(?:\n[ ]*)?
(?<!\\)\[(?<link_id>.*?)(?<!\\)\]
)/mxsp;
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