private bool Equals(Antlr4.Runtime.Atn.ArrayPredictionContext other, HashSet <PredictionContextCache.IdentityCommutativePredictionContextOperands> visited)
{
Stack <PredictionContext> selfWorkList = new Stack <PredictionContext>();
Stack <PredictionContext> otherWorkList = new Stack <PredictionContext>();
selfWorkList.Push(this);
otherWorkList.Push(other);
while (selfWorkList.Count > 0)
{
PredictionContextCache.IdentityCommutativePredictionContextOperands operands = new PredictionContextCache.IdentityCommutativePredictionContextOperands(selfWorkList.Pop(), otherWorkList.Pop());
if (!visited.Add(operands))
{
continue;
}
int selfSize = operands.X.Size;
if (selfSize == 0)
{
if (!operands.X.Equals(operands.Y))
{
return(false);
}
continue;
}
int otherSize = operands.Y.Size;
if (selfSize != otherSize)
{
return(false);
}
for (int i = 0; i < selfSize; i++)
{
if (operands.X.GetReturnState(i) != operands.Y.GetReturnState(i))
{
return(false);
}
PredictionContext selfParent = operands.X.GetParent(i);
PredictionContext otherParent = operands.Y.GetParent(i);
if (selfParent.GetHashCode() != otherParent.GetHashCode())
{
return(false);
}
if (selfParent != otherParent)
{
selfWorkList.Push(selfParent);
otherWorkList.Push(otherParent);
}
}
}
return(true);
}
public override bool Equals(object o)
{
if (this == o)
{
return(true);
}
else
{
if (!(o is Antlr4.Runtime.Atn.ArrayPredictionContext))
{
return(false);
}
}
if (this.GetHashCode() != o.GetHashCode())
{
return(false);
}
// can't be same if hash is different
Antlr4.Runtime.Atn.ArrayPredictionContext other = (Antlr4.Runtime.Atn.ArrayPredictionContext)o;
return(Equals(other, new HashSet <PredictionContextCache.IdentityCommutativePredictionContextOperands>()));
}
private static PredictionContext AppendContext(PredictionContext context, PredictionContext suffix, PredictionContext.IdentityHashMap visited)
{
if (suffix.IsEmpty)
{
if (IsEmptyLocal(suffix))
{
if (context.HasEmpty)
{
return EmptyLocal;
}
throw new NotSupportedException("what to do here?");
}
return context;
}
if (suffix.Size != 1)
{
throw new NotSupportedException("Appending a tree suffix is not yet supported.");
}
PredictionContext result;
if (!visited.TryGetValue(context, out result))
{
if (context.IsEmpty)
{
result = suffix;
}
else
{
int parentCount = context.Size;
if (context.HasEmpty)
{
parentCount--;
}
PredictionContext[] updatedParents = new PredictionContext[parentCount];
int[] updatedReturnStates = new int[parentCount];
for (int i = 0; i < parentCount; i++)
{
updatedReturnStates[i] = context.GetReturnState(i);
}
for (int i_1 = 0; i_1 < parentCount; i_1++)
{
updatedParents[i_1] = AppendContext(context.GetParent(i_1), suffix, visited);
}
if (updatedParents.Length == 1)
{
result = new SingletonPredictionContext(updatedParents[0], updatedReturnStates[0]);
}
else
{
System.Diagnostics.Debug.Assert(updatedParents.Length > 1);
result = new Antlr4.Runtime.Atn.ArrayPredictionContext(updatedParents, updatedReturnStates);
}
if (context.HasEmpty)
{
result = PredictionContext.Join(result, suffix);
}
}
visited[context] = result;
}
return result;
}
private static PredictionContext AppendContext(PredictionContext context, PredictionContext suffix, PredictionContext.IdentityHashMap visited)
{
if (suffix.IsEmpty)
{
if (IsEmptyLocal(suffix))
{
if (context.HasEmpty)
{
return(EmptyLocal);
}
throw new NotSupportedException("what to do here?");
}
return(context);
}
if (suffix.Size != 1)
{
throw new NotSupportedException("Appending a tree suffix is not yet supported.");
}
PredictionContext result;
if (!visited.TryGetValue(context, out result))
{
if (context.IsEmpty)
{
result = suffix;
}
else
{
int parentCount = context.Size;
if (context.HasEmpty)
{
parentCount--;
}
PredictionContext[] updatedParents = new PredictionContext[parentCount];
int[] updatedReturnStates = new int[parentCount];
for (int i = 0; i < parentCount; i++)
{
updatedReturnStates[i] = context.GetReturnState(i);
}
for (int i_1 = 0; i_1 < parentCount; i_1++)
{
updatedParents[i_1] = AppendContext(context.GetParent(i_1), suffix, visited);
}
if (updatedParents.Length == 1)
{
result = new SingletonPredictionContext(updatedParents[0], updatedReturnStates[0]);
}
else
{
System.Diagnostics.Debug.Assert(updatedParents.Length > 1);
result = new Antlr4.Runtime.Atn.ArrayPredictionContext(updatedParents, updatedReturnStates);
}
if (context.HasEmpty)
{
result = PredictionContext.Join(result, suffix);
}
}
visited[context] = result;
}
return(result);
}
