// 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;

namespace Microsoft.CodeAnalysis.Shared.Utilities
{
    internal partial class SymbolEquivalenceComparer
    {
        private sealed class SimpleNameAssemblyComparer : IEqualityComparer<IAssemblySymbol?>
        {
            public static readonly IEqualityComparer<IAssemblySymbol> Instance = new SimpleNameAssemblyComparer();

            public bool Equals(IAssemblySymbol? x, IAssemblySymbol? y)
                => AssemblyIdentityComparer.SimpleNameComparer.Equals(x?.Name, y?.Name);

            public int GetHashCode(IAssemblySymbol? obj)
            {
                if (obj is null)
                    return 0;

                return AssemblyIdentityComparer.SimpleNameComparer.GetHashCode(obj.Name);
            }
        }
    }
}
