[antlr-interest] Re: Questions about learning ANTLR

Ric Klaren klaren at cs.utwente.nl
Tue Oct 8 05:03:27 PDT 2002


Hi,

On Mon, Oct 07, 2002 at 03:38:09PM -0400, Hensley, Richard wrote:
> Ok, now the whole thing makes sense. There are two approaches to having
> literal strings in parser rules. 
> 
> 1) put double quoted strings directly in parser rules 

-> Error prone one typo and you have a new token..

> 2) create a tokens { } section with literal strings, and 
>    reference the tokens in parser rules 

-> More structural imho, newer antlr's generate warnings for tokens just
   defined outside the tokens section.

Cheers,

Ric
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