comment: c_comment | line_comment

c_comment:
qr!
    /\*             # C-Style comments open with a "/*"...
    (?:             # followed by...
        [^*]        # non-"*" characters
     |  \*(?=[^\/]) # or a "*" and a non-slash character
    )*
    \*/             # ...and closed by a "*/"
!x;

line_comment: qr!//[^\n]*!;

##</code><code>##

# Yuck!
rule1: comment(s?) subrule1 | comment(s?) subrule2
rule1: comment(s?) subrule3 comment(s?) subrule4

##</code><code>##

setting = (
    sub-setting1 = "value1";
    optimize     = "12"; // unreliable!

    /* foo = "bar"; Commented out, not working right now*/
);

##</code><code>##

setting = (
    sub-setting1 = "value2";
    optimize     = "12"; // unreliable!

    /* foo = "bar"; Commented out, not working right now*/
);