// 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.Linq;
using System.Threading;
using Microsoft.CodeAnalysis;

namespace Microsoft.CodeAnalysis.IntroduceVariable;

internal abstract partial class AbstractIntroduceVariableService<TService, TExpressionSyntax, TTypeSyntax, TTypeDeclarationSyntax, TQueryExpressionSyntax, TNameSyntax>
{
    private sealed partial class State
    {
        private bool IsInParameterContext(
            CancellationToken cancellationToken)
        {
            if (!_service.IsInParameterInitializer(Expression))
            {
                return false;
            }

            // The default value for a parameter is a constant.  So we always allow it unless it
            // happens to capture one of the method's type parameters.
            var bindingMap = GetSemanticMap(cancellationToken);
            if (bindingMap.AllReferencedSymbols.OfType<ITypeParameterSymbol>()
                                                .Where(tp => tp.TypeParameterKind == TypeParameterKind.Method)
                                                .Any())
            {
                return false;
            }

            return true;
        }
    }
}