// 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
    {
        internal class SignatureTypeSymbolEquivalenceComparer : IEqualityComparer<ITypeSymbol?>
        {
            private readonly SymbolEquivalenceComparer _symbolEquivalenceComparer;
 
            public SignatureTypeSymbolEquivalenceComparer(SymbolEquivalenceComparer symbolEquivalenceComparer)
                => _symbolEquivalenceComparer = symbolEquivalenceComparer;
 
            public bool Equals(ITypeSymbol? x, ITypeSymbol? y)
                => this.Equals(x, y, null);
 
            public bool Equals(ITypeSymbol? x, ITypeSymbol? y, Dictionary<INamedTypeSymbol, INamedTypeSymbol>? equivalentTypesWithDifferingAssemblies)
                => _symbolEquivalenceComparer.GetEquivalenceVisitor(compareMethodTypeParametersByIndex: true, objectAndDynamicCompareEqually: true).AreEquivalent(x, y, equivalentTypesWithDifferingAssemblies);
 
            public int GetHashCode(ITypeSymbol? x)
                => _symbolEquivalenceComparer.GetGetHashCodeVisitor(compareMethodTypeParametersByIndex: true, objectAndDynamicCompareEqually: true).GetHashCode(x, currentHash: 0);
        }
    }
}