[antlr-interest] Question about tree grammar (antlr 3)

[Kay Roepke]

On 4. Jul 2006, at 17:51 Uhr, Terence Parr wrote:

>> setDir : ^('dir' LITERAL {s.setDirIn(((Tree)$LITERAL).getText());})
>>
>> Do somebody know one better, without cast?
>
> You can try setting ASTLabelType as a grammar option or more simply  
> do this:
>
> setDir : ^('dir' LITERAL {s.setDirIn($LITERAL.text);}) ;

As an alternative you could also do

setDir : ^('dir' LITERAL {s.setDirIn(($LITERAL.tree).getText());})

to get rid of the explicit cast. But in this it probably doesn't make  
sense, since
the text is much easier accessable per Ter's suggestion.

See Java.stg for the templates that make it happen (very close to the  
end of the file).

-k