[antlr-interest] valid grammar does not compile

[Bart Kiers]

On Thu, Nov 17, 2011 at 10:14 AM, D. Frej <dieter_frej at gmx.net> wrote:

>  and still: the compilation error stays even if I do not quote the
> question mark
>

Ah, hold on, you're using the `..` (range) operator inside a parser rule
(horef). Either create a lexer rule matching '?'  'a'..'z':

Horef
    :    '?' 'a'..'z'
    ;

, or move  'a'..'z' to a lexer rule:

horef
    :    '?' Letter
    ;

Letter
  :  'a'..'z'
  ;


But still, the question mark should not be escaped.

Regards,

Bart.