return $this;
    return ($this);
    return (($this));
    return ((($this)));

##</code><code>##

    3 + 4;
    (3 + 4);
    (3) + (4);
    ((3) + (4));

##</code><code>##

    return @x;

##</code><code>##

    my @x = qw /foo bar baz/;
    sub my_func {return @x};
    (my_func) [1] .= "hello";

##</code><code>##

    Can't modify list slice in concatenation (.) or string