[antlr-interest] Lexer error reporting

[Bill Andersen]

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.

Doing this with a parser is easy - I just overrode emitErrorMessage in a custom subclass of Parser.  Got that done already, but can't seem to find out how to do the same in the lexer.

Any help appreciated.

	.bill