// 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;

/// <summary>
/// For completion and quickinfo in linked files, we compare symbols from different documents
/// to determine if they are similar enough for us to suppress the platform dependence
/// warning icon. We consider symbols equivalent if they have the same name.
/// </summary>
internal sealed class LinkedFilesSymbolEquivalenceComparer : IEqualityComparer<ISymbol>
{
    public static readonly LinkedFilesSymbolEquivalenceComparer Instance = new();

    public bool Equals(ISymbol? x, ISymbol? y)
        => x?.Name == y?.Name;

    public int GetHashCode(ISymbol symbol)
        => symbol.Name.GetHashCode();
}