[antlr-interest] Default recovery code in tree grammars

Richard Thrippleton richard.thrippleton at progress.com
Wed Jun 30 06:38:24 PDT 2010

In parser grammars, ANTLR generates some default error-recovery code that I 
don't override, because it's moderately good and better than bailing out on 
the first error.

However, for tree grammars I've seen ANTLR generate similar error-recovery 
code to try to recover from malformed trees. I override this as I've seen 
statements (that I absolutely agree with) that any kind of automatic 
recovery from walking a malformed tree is folly. With that said, why does 
ANTLR generate any kind of recovery code at all for this kind of grammar?


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