sub parse_csv {
    my $text = shift;      # record containing comma-separated values
    my @new  = ();
    push(@new, $+) while $text =~ m{
        # the first part groups the phrase inside the quotes.
        # see explanation of this pattern in MRE
        "([^\"\\]*(?:\\.[^\"\\]*)*)",?
           |  ([^,]+),?
           | ,
       }gx;
       push(@new, undef) if substr($text, -1,1) eq ',';
       return @new;      # list of values that were comma-separated
}

##</code><code>##

use Text::ParseWords;

sub parse_csv {
    return quotewords(",",0, $_[0]);
}