[antlr-interest] Re: strong error recovery
Neurosurg
khamenya at mail.ru
Fri Jul 30 02:17:01 PDT 2004
Thank you for you reply, Monty
--- In antlr-interest at yahoogroups.com, Monty Zukowski <monty at c...> wrote:
> Here's the idea. Follow my discussion in my article about how to write
> a parser which grabs tokens from the input stream and then only parses
> when it sees an interesting token. In my example GOTO was one such
> token that should be parsed. In your example it will be anything that
> can be an expression.
That's the point. In my case, the valid symbols might be a part of the
garbage:
input:
+)((7+5)*8
extracted output:
(7+5)*8
So, the following your advice looks for me as closer
approach to my case:
> [...]Now that I think about it, there are probably other ways to handle
> this. For instance if you aren't passing on to a TokenStream, you
> could get by with a parser rule like this:
>
> top: (expr | .)*;
however this doesn't work as well for the test above and test posted
in my original post.
Best regards,
Valery
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