using System;
using System.Runtime.InteropServices;

namespace gaemstone.Utility;

public readonly ref struct SpanToRef<T>
	where T : class
{
	private readonly Span<nint> _span;

	public int Length => _span.Length;
	public T? this[int index] => (_span[index] != 0)
		? (T)((GCHandle)_span[index]).Target! : null;

	internal SpanToRef(Span<nint> span) => _span = span;

	public void Clear() => _span.Clear();
	public void CopyTo(SpanToRef<T> dest) => _span.CopyTo(dest._span);
}