// 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.Collections.Immutable;
using System.Threading;
using System.Threading.Tasks;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.FindSymbols
{
    internal static partial class DependentTypeFinder
    {
        private static Task<ImmutableArray<INamedTypeSymbol>> FindDerivedClassesInCurrentProcessAsync(
            INamedTypeSymbol type,
            Solution solution,
            IImmutableSet<Project>? projects,
            bool transitive,
            CancellationToken cancellationToken)
        {
            if (s_isNonSealedClass(type))
            {
                static bool TypeMatches(INamedTypeSymbol type, HashSet<INamedTypeSymbol> set)
                    => TypeHasBaseTypeInSet(type, set);
 
                return DescendInheritanceTreeAsync(type, solution, projects,
                    typeMatches: TypeMatches,
                    shouldContinueSearching: s_isNonSealedClass,
                    transitive: transitive,
                    cancellationToken: cancellationToken);
            }
 
            return SpecializedTasks.EmptyImmutableArray<INamedTypeSymbol>();
        }
    }
}