Hi Bill,
On Wed, Nov 23, 2011 at 5:41 PM, Bill Andersen <bill.ander...@mac.com>wrote:
> Hi Folks...
>
> Been trying to figure out how to shut off default Lexer behavior to print
> messages to System.err, such as:
>
> line 2:4 no viable alternative at character ' '
>
> Instead, I'd like to catch these and do something with them. Overriding
> reportError(RecognitionException) doesn't work and no other option seems
> obvious.
Both the lexer and parser have a `reportError(...)` method, and my guess is
that you did something like this:
@members {
@Override
public void reportError(RecognitionException e) ...
}
which is a short-hand for:
@parser::members { // note the `parser::`
@Override
public void reportError(RecognitionException e) ...
}
But since a "no viable alternative" error is something that comes from the
lexer, you need to explicitly override the lexer method like this:
@lexer::members {
@Override
public void reportError(RecognitionException e) {
System.out.println("CUSTOM ERROR...");
}
}
Regards,
Bart.
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