EmptyEnumerator.cs

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using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
 
namespace System.Linq.Parallel;
 
internal sealed class EmptyEnumerator<T> : QueryOperatorEnumerator<T, int>, IEnumerator<T>, IEnumerator, IDisposable
{
    public T Current => default(T);
 
    object IEnumerator.Current => null;
 
    internal override bool MoveNext([MaybeNullWhen(false)][AllowNull] ref T currentElement, ref int currentKey)
    {
        return false;
    }
 
    public bool MoveNext()
    {
        return false;
    }
 
    void IEnumerator.Reset()
    {
    }
}