How do I throw RecognitionException when some token is encountered

[nprime496]

Hi, I've added some rules in my lexer .g4 file but I'm unable to find a good way to throw an exception (to stop parsing) when some token is recognized using ANTR4.

NUM : (DIGIT)+ { /* throw an exception*/};

Please how can I do that ?

[jgremmen]

Please look at the discussion #3162 I started a while ago.
Short answer to your question: there is no good way yet.