Split on comma, but only when not in parenthesis

Question

I am trying to do a split on a string with comma delimiter

my $string=\'ab,12,20100401,xyz(A,B)\';
my @array=split(\',\',$string);

If I do

Answer 1

use Text::Balanced qw(extract_bracketed);
my $string = "ab,12,20100401,xyz(A,B(a,d))";
my @params = ();
while ($string) {
    if ($string =~ /^([^(]*?),/) {
        push @params, $1;
        $string =~ s/^\Q$1\E\s*,?\s*//;
    } else {
        my ($ext, $pre);
        ($ext, $string, $pre) = extract_bracketed($string,'()','[^()]+');
        push @params, "$pre$ext";
        $string =~ s/^\s*,\s*//;
    }
}

This one supports:

• nested parentheses;
• empty fields;
• strings of any length.