[antlr-interest] what is best?
Gavin Lambert
antlr at mirality.co.nz
Thu Oct 30 00:48:26 PDT 2008
At 05:39 30/10/2008, Heinrich du Toit wrote:
>First possbility:
>
>a: ('{')=> b
> | c;
>b: '{' ID '}';
>
>second possibility:
>a: b | c ;
>b: ('{')=> '{' ID '}' ;
>
>It's just an example but the question is where do I put the
>syn-pred for the best effect?
The first is much better. (On the other hand, it's also usually
unnecessary, since ANTLR will automatically put in single-token
lookahead in 'a' to decide between 'b' and 'c' anyway.)
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