private Func <Boolean> GetProcessingDelegate()
{
if (SourcePipe1 == null || SourcePipe2 == null)
{
return(() => false);
}
if (ZipDelegate != null)
{
return () =>
{
if (SourcePipe1.MoveNext() && SourcePipe2.MoveNext())
{
_CurrentElement = ZipDelegate(SourcePipe1.Current,
SourcePipe2.Current);
return true;
}
return false;
}
}
;
if (CountedZipDelegate != null)
{
return () =>
{
if (SourcePipe1.MoveNext() && SourcePipe2.MoveNext())
{
_CurrentElement = CountedZipDelegate(SourcePipe1.Current,
SourcePipe2.Current,
Counter++);
return true;
}
return false;
}
}
;
return(() => false);
}
/// <summary>
/// Advances the enumerator to the next element of the collection.
/// </summary>
/// <returns>
/// True if the enumerator was successfully advanced to the next
/// element; false if the enumerator has passed the end of the
/// collection.
/// </returns>
public override Boolean MoveNext()
{
while (true)
{
if (CurrentPipe == null)
{
if (!SourcePipe2.MoveNext())
{
return(false);
}
CurrentPipe = SourcePipe2.Current;
}
if (CurrentPipe.MoveNext())
{
_CurrentElement = CurrentPipe.Current;
return(true);
}
CurrentPipe = null;
}
}