Add getHigh() and getLow() to LexerPriority.
Add getHigh() and getLow() to LexerPriority.

Signed-off-by: Jean Privat <51f8b1fa9b424745378826727452997ee2a7c3d7@pryen.org>
Signed-off-by: Etienne M. Gagnon <bf06ec0eb40152cd863534753d026b021022c851@j-meg.com>

privat/sablecc,privat/sablecc,privat/sablecc,privat/sablecc,privat/sablecc