[antlr-interest] [newbie] Precedence of rules

[Felix Dorner]

Hi Robert.
>
> startup:
>   first=STRING COMMA second=STRING
>   {
>     System.out.println($first.text + " and " + $second.text);
>   }
> ;
>
> COMMA : ',';
> STRING : ('a'..'z'|'A'..'Z')+;
>   

> STRING_WITH_COMMA : STRING (COMMA STRING)+ ;
>
>   
I am pretty sure this rule bites with the "startup" rule. I am also 
pretty sure that you would not want this to be a Lexer but a Parser rule 
(i.e. should start with a lower Case.) Then you would have:

startup: STRING COMMA STRING {...};

string_with_comma: STRING (COMMA STRING)+;


Now it depends how those rules are invoked. If they have a common 
"superrule", then the grammar would be ambiguous.



Felix