[antlr-interest] Fragment rules inside parser rules

[Bart Kiers]

Hi Ben,

You cannot use fragment rules inside parser rules. So yes, you need to make
LKU a normal token. If you don't want that (for whatever reason), you need
to include the '&' in the 'NAME' rule:

NAME
  :  '&' ('a'..'z')+
  ;


Regards,

Bart.


On Wed, May 18, 2011 at 3:00 PM, Ben Corne <ben.corne at gmail.com> wrote:

> Hello
>
> Do I really need to make LKU in the example below a normal token rule or is
> there a way to get this to work for the input '&foo;' not using literals
> inside the parser rule or real tokens.
> ============================
> grammar Foo;
>
> program
> : (LKU NAME ';')+
>  ;
> fragment LKU
> : '&'
>  ;
> NAME
> : ('a'..'z')*
>  ;
> =============================
>
> Regards
> Ben C.
>
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