use strict;
my $str = '(hello)
\'hello\'
"hello"
(hello (world))
"hello \'world\'"
(hello "world")
"hello (world)"
""
\'\'
()
\'"hello world\'
"\'hello world"
((
))
\'"
\'"
(hello(
)hello)
"hello\'
"hello world\'
\'hello world"
\'"hello world\'"
';
my $regex = qr/^((['"])|\()(.*)(?(?=\2)(\2)|(\)))$/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