public virtual void Recover(Parser recognizer, RecognitionException e)
{
// System.out.println("recover in "+recognizer.getRuleInvocationStack()+
// " index="+recognizer.getInputStream().index()+
// ", lastErrorIndex="+
// lastErrorIndex+
// ", states="+lastErrorStates);
if (lastErrorIndex == ((ITokenStream)recognizer.InputStream).Index && lastErrorStates != null && lastErrorStates.Contains(recognizer.State))
{
// uh oh, another error at same token index and previously-visited
// state in ATN; must be a case where LT(1) is in the recovery
// token set so nothing got consumed. Consume a single token
// at least to prevent an infinite loop; this is a failsafe.
// System.err.println("seen error condition before index="+
// lastErrorIndex+", states="+lastErrorStates);
// System.err.println("FAILSAFE consumes "+recognizer.getTokenNames()[recognizer.getInputStream().LA(1)]);
recognizer.Consume();
}
lastErrorIndex = ((ITokenStream)recognizer.InputStream).Index;
if (lastErrorStates == null)
{
lastErrorStates = new IntervalSet();
}
lastErrorStates.Add(recognizer.State);
IntervalSet followSet = GetErrorRecoverySet(recognizer);
ConsumeUntil(recognizer, followSet);
}
