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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
namespace Roslyn.Utilities
{
internal partial class SpecializedCollections
{
private partial class Empty
{
internal static class BoxedImmutableArray<T>
{
// empty boxed immutable array
public static readonly IReadOnlyList<T> Instance = ImmutableArray<T>.Empty;
}
internal class List<T> : Collection<T>, IList<T>, IReadOnlyList<T>
{
public static new readonly List<T> Instance = new();
protected List()
{
}
public int IndexOf(T item)
{
return -1;
}
public void Insert(int index, T item)
{
throw new NotSupportedException();
}
public void RemoveAt(int index)
{
throw new NotSupportedException();
}
public T this[int index]
{
get
{
throw new ArgumentOutOfRangeException(nameof(index));
}
set
{
throw new NotSupportedException();
}
}
}
}
}
}
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