[antlr-interest] newbie question: throwing an exception from parsing behavior

[Blake Meike]

Yeah, I tried something like that...  RecognitionException does not  
take that second argument.

I can, of course, catch my subclass, explicitly, and print out its  
message.  I was hoping there was some way to integrate with antlr's  
error handling mechanism...

-blake


On Feb 24, 2008, at 5:40 PM, Olivier Lefevre wrote:

> Blake Meike wrote:
>> It all works fine, except that I can't figure our how to throw a  
>> useful exception, when the input is invalid.
>
> From within an action. Subclass RecognitionException to add a  
> message string or whatever and, in the action, do
>
>    if (bad) throw new MyException(input, myMsg);
>
> All parsers have an input variable (inherited from Parser).
>
> -- O.L.
>
>