maui-linux/Xamarin.Forms.Core/CastingEnumerator.cs

using System.Collections;
using System.Collections.Generic;

namespace Xamarin.Forms
{
	internal class CastingEnumerator<T, TFrom> : IEnumerator<T> where T : class where TFrom : class
	{
		readonly IEnumerator<TFrom> _enumerator;

		bool _disposed;

		public CastingEnumerator(IEnumerator<TFrom> enumerator)
		{
			_enumerator = enumerator;
		}

		public void Dispose()
		{
			if (_disposed)
				return;
			_disposed = true;

			_enumerator.Dispose();
		}

		object IEnumerator.Current
		{
			get { return Current; }
		}

		public bool MoveNext()
		{
			return _enumerator.MoveNext();
		}

		public void Reset()
		{
			_enumerator.Reset();
		}

		public T Current
		{
			get { return _enumerator.Current as T; }
		}
	}
}