[antlr-interest] anybody use exception[label]?

[Brannon King]

>Anybody use the feature where you can attach an exception to a label to
put in a specific try/catch?

I've been using the exception catch in the parser like this:

cornerType :
	LP! CORNERTYPE^ i:IDENTIFIER
		 { -1 != Arrays.binarySearch(cornerTypes,
i.getText().toUpperCase()) }?
	RP!;
	exception catch[SemanticException ex]{
		throw new SemanticException("line " + i.getLine() + ":"
+ i.getColumn() + ":" + LT(1).getColumn() +
			": expecting one of [" +
arrayToString(cornerTypes,", ") + "], found " + i.getText(),
		i.getFilename(), i.getLine(), i.getColumn());
	}

What advantage would using the label give me? And how would that even
change behavior?