[antlr-interest] Hex or Unicode char definition?

[Andreas Volz]

Hello,

how is it possible to define chars as hex or unicode chars. e.g.:

fragment ALPHA
	: 'a'..'z' | 'A'..'Z' | '.' | ',' | ' ' | '@'

I have a syntax in rfc2234[1] format and there hex chars are defined.
How should I transfer this to ANTLR? e.g.:

   CHAR         = %x01-7F
        ; Any C0 Controls and Basic Latin, excluding NULL from
        ; Code Charts, pages 7-6 through 7-9 in [UNICODE]

regards
Andreas

[1] http://tools.ietf.org/html/rfc2234