[antlr-interest] Attributes on AST nodes

[Andy Tripp]

Priya wrote:

>Is there a way to directly encode the precision and width information as
>a.precision , b.precision  a.width b.width etc directly  in the node itself?
>
>  
>
Yes, just make your own subclass of antlr.Token.
There's some method to tell the lexer to create instances of your 
subclass rather than antlr.Token objects.
I can't remember offhand what that method is, as I've done it the way it 
should be done...

Have this interface:
interface TokenFactory {
    antlr.Token makeToken(int type);
}

Have this method in the lexer:
public void setTokenFactory(TokenFactory tokenFactory) {
...
}

I hope that ANTLR v3 does it this way (maybe it already does it this way 
- I'm still on 2.7.2)