example.rl

%%machine example;

%%{
    cdata_start = '<![CDATA[';
    cdata_end   = ']]>';

    cdata := |*
        # Everything that is not "]]>" (must match consecutive characters)
        # Sadly this seems to result in "foo]]" being matched for input 
        # "<![CDATA[foo]]>".
        (any* -- cdata_end) => {
            ...
        };

        # Just the literal "]]>" so we can break out of this machine
        cdata_end => {
            ...
        };
    *|;
}%%