// 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.Collections.Generic;
using System.Linq;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Shared.Extensions
{
    internal partial class INamespaceSymbolExtensions
    {
        private class Comparer : IEqualityComparer<INamespaceSymbol?>
        {
            public bool Equals(INamespaceSymbol? x, INamespaceSymbol? y)
                => GetNameParts(x).SequenceEqual(GetNameParts(y));
 
            public int GetHashCode(INamespaceSymbol? obj)
                => GetNameParts(obj).Aggregate(0, (a, v) => Hash.Combine(v, a));
        }
    }
}