grinder++ !
It's rather like a solution I came up with, albeit without using the module in question:
my $str = 'f1,f2, SUM(f3),CONCAT(f4,f5, f6), f7';
my ( $tok, @toks, $parens );
while ( $str ) {
my $char = substr $str, 0, 1, '';
$char eq ' ' and next;
$char eq '(' and $parens++;
$char eq ')' and $parens--;
$char eq ',' && ! $parens
and push( @toks, $tok ), $tok = '', next;
$tok .= $char;
push @toks, $tok if ! $str;
}
print join ' -- ', @toks;
...but I didn't want to post it for fear that it wouldn't be very robust. :)
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