[antlr-interest] Java grammar accepting junk

[Ron Hunter-Duvar]

Terence Parr wrote:
>
> On Aug 15, 2008, at 4:03 PM, Ron Hunter-Duvar wrote:
>
>> Funny, I went looking for just such a method and didn't find one. Now 
>> I go back and see exactly the code you pointed to. Accomplishes the 
>> same thing with slightly less code.
>>
>> About my other question, though, if errors have occurred, with 
>> backtracking and recovery going on, how can I know if it succeeded in 
>> recovering and got to the end of file or just gave up early?
>
> it only counts real errors not backtracking errors :)  you can also 
> ask for state.input.index() to get the token index.
>
> Ter
>
So a real error means the parser really did give up before the end of 
the file was reached? If so, then what I have is sufficient.

Not sure what the token index would tell me. Do you mean use that index 
to get the token and check if it's an EOF token?

Ron

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