[antlr-interest] Re: Return value warning?

[kozchris]

You are fine. I don't think you can suppress this message (at least I
haven't found a way). 

The warning is useful for checking why you haven't used the value
returned when calling a subrule. In those cases I suppress the
warnings by assigning the return value of the rule to a dummy variable. 

Using your example

mainRule {String temp;}:
 temp=positiveNumeric
;

Chris

--- In antlr-interest at yahoogroups.com, "codeteacher"
<codeteacher at t...> wrote:
> 
> Hi all,
> 
> I've got the following rule:
> 
> positiveNumeric returns [String value] :
> 	( i:NUM_INT {value = i.getText();}
> 	| f:NUM_FLOAT {value = f.getText();} );
> 
> But ANTLR gave me this warning:
> warning:Rule 'positiveNumeric' returns a value
> 
> I thought that "returns" is indeed a keyword and is fully supported by
> ANTLR. I looked at the generated code and it seemed okay. Is it that
> return values in grammar rules are discouraged in ANTLR? If not, how
> can I suppress this message? Or did I do something wrong?
> 
> Thanks a lot.





 
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