On Fri, Oct 15, 2010 at 3:39 PM, Remi Marechal <[email protected]>wrote:

> if i create a rule like
>
> LETTER: 'a'..'z' ;


With the '~' (tilde):

NON_LETTER
  :  ~LETTER
  ;

Note that the negation only works on single characters (or lexer rules that
match a single character). For example, you can't negate the rule:

FOO
  :  'foo'
  ;

Regards,

Bart.

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