use strict;
my $str = '@media only screen {
p {
color:red;
}
}
@media only screen and (max-width: 596px) {
p {
color:blue;
}
}
@media only screen {
}
img {
display: block;
}
@media only screen and (max-width: 240px) {
p {
color:green;
}
}
p {
font-weight: normal;
}';
my $regex = qr/@media\b[^{]*({(?>[^{}]++|(?1))*})/p;
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