// 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.Extensions
{
    internal static partial class ITypeSymbolExtensions
    {
        public static IList<ITypeParameterSymbol> GetReferencedMethodTypeParameters(
            this ITypeSymbol? type, IList<ITypeParameterSymbol>? result = null)
        {
            result ??= new List<ITypeParameterSymbol>();
            type?.Accept(new CollectTypeParameterSymbolsVisitor(result, onlyMethodTypeParameters: true));
            return result;
        }
 
        public static IList<ITypeParameterSymbol> GetReferencedTypeParameters(
            this ITypeSymbol? type, IList<ITypeParameterSymbol>? result = null)
        {
            result ??= new List<ITypeParameterSymbol>();
            type?.Accept(new CollectTypeParameterSymbolsVisitor(result, onlyMethodTypeParameters: false));
            return result;
        }
    }
}