[antlr-interest] How to stop lexer reporting errors to standard output?

[Vaclav Barta]

Hi,

I'm writing a library (parsing SQL, among other things) using ANTLR 
(3.0, C# target), and I'd like it not to try any error recovery, but 
just throw an exception on invalid input (so that the library user can 
decide what to do about the error). I've managed to suppress error 
recovery by specifying an empty @rulecatch, but I still occasionally get 
warnings on standard output, i.e.

SELECT '''

results in

line 1:10 mismatched character '<EOF>' expecting '''

How do I get rid of the message (while still failing to parse the 
invalid input, of course)?

The lexer rule is AFAIK quite conventional

fragment
StringRun :
	(~ '\'' )+
	;

ASCIIStringLiteral :
	'\'' { text = ""; }
	( s = StringRun { text = $s.text; } )? '\''
	( '\'' {
			text = text + "\'";
		} ( s = StringRun { text = text + $s.text; } )? '\''
	)*
	;

if that helps.

	Bye
		Vasek