#if NET8_0_OR_GREATER
 
using System.Collections;
using System.Collections.Generic;
 
public class ReadOnlySet<T>(
	IEqualityComparer<T> comparer,
	params T[] items) :
		IReadOnlySet<T>
{
	readonly HashSet<T> hashSet = new(items, comparer);
 
	public int Count =>
		hashSet.Count;
 
	public bool Contains(T item) =>
		hashSet.Contains(item);
 
	public IEnumerator<T> GetEnumerator() =>
		hashSet.GetEnumerator();
 
	public bool IsProperSubsetOf(IEnumerable<T> other) =>
		hashSet.IsProperSubsetOf(other);
 
	public bool IsProperSupersetOf(IEnumerable<T> other) =>
		hashSet.IsProperSupersetOf(other);
 
	public bool IsSubsetOf(IEnumerable<T> other) =>
		hashSet.IsSubsetOf(other);
 
	public bool IsSupersetOf(IEnumerable<T> other) =>
		hashSet.IsSupersetOf(other);
 
	public bool Overlaps(IEnumerable<T> other) =>
		hashSet.Overlaps(other);
 
	public bool SetEquals(IEnumerable<T> other) =>
		hashSet.SetEquals(other);
 
	IEnumerator IEnumerable.GetEnumerator() =>
		GetEnumerator();
}
 
#endif