code: public final void mARITH_OPER() throws RecognitionException {
  		try {
  			int _type = ARITH_OPER;
  			int _channel = DEFAULT_TOKEN_CHANNEL;
  			// druidG.g:703:13: ( ( '*' | '+' | '/' | '-' ) )
  			// druidG.g:
  			{
  			if ( (input.LA(1) >= '*' && input.LA(1) <= '+')||input.LA(1)=='-'||input.LA(1)=='/' ) {
  				input.consume();
  			}
  			else {
  				MismatchedSetException mse = new MismatchedSetException(null,input);
  				recover(mse);
  				throw mse;
  			}
  			}
  
  			state.type = _type;
  			state.channel = _channel;
  		}
  		finally {
  			// do for sure before leaving
  		}
  	}
docs: $ANTLR start "ARITH_OPER"