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]*!;