[antlr-interest] Possible Antlr defect?

[Gavin Lambert]

At 12:38 10/06/2007, Terence Parr wrote:
 >
 >That "elsewhere in a grammar" is the key.  Just referencing a
 >token defines it as well as using the tokens section.

That doesn't seem like a good idea -- it would make it vulnerable 
to typos.  References to a token should be illegal unless they've 
been specifically defined in a tokens section, been given a lexing 
rule, or imported from a vocab file.