[antlr-interest] how to impose evaluation

Maassen, H.A.M. H.A.M.Maassen at student.tue.nl
Sat Nov 27 06:21:30 PST 2004


A flag should work:

>  start
>      : (check)+
>        expression
>      ;
>     
>  check
>      : rule1
         { mybool = true; }
>       | rule2
          { mybool = false; }
>      ;
> expression
>   : { mybool }? rule3
>   | { !mybool }? rule4
>   ;


 
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