use strict;
my $str = '* JKL
1. JKL-1
2. JKL-2
';
my $regex = qr/(?<li_all>
(?<li_lead_line>\n)?
(?<li_lead_space>^[ \t]*)
(?<list_type_any>
(?:
(?:
(?<list_type_unordered_star>(?&list_unordered_star))
|
(?<list_type_unordered_minus>(?&list_unordered_minus))
|
(?<list_type_unordered_plus>(?&list_unordered_plus))
)
|
(?<list_type_ordered>(?&list_ordered))
)
)
[ \t]*
(?<li_content>(?s:.*?)
(\n{1,2}))
(?= \n*
(
\z
|
\g{li_lead_space}
(?<list_type_any2>
(?:
(?:
(?<list_type_unordered_star2>(?&list_unordered_star))
|
(?<list_type_unordered_minus2>(?&list_unordered_minus))
|
(?<list_type_unordered_plus2>(?&list_unordered_plus))
)
|
(?<list_type_ordered2>(?&list_ordered))
)
)
[ \t]*
)
)
)
(?(DEFINE)
(?<list_unordered_star>
[\*]
(?!
(?:
[ ]?[\*][ ]?
){2,}
)
)
(?<list_unordered_minus>
[\-]
(?!
(?:
[ ]?[\-][ ]?
){2,}
)
)
(?<list_unordered_plus>[\+])
(?<list_ordered>\d+[\.])
)/mxp;
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