// 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.
 
#nullable disable warnings
 
using System.Threading;
using Microsoft.CodeAnalysis;
 
namespace Analyzer.Utilities.Extensions
{
    internal static class SemanticModelExtensions
    {
        public static IOperation? GetOperationWalkingUpParentChain(this SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken)
        {
            // Walk up the parent chain to fetch the first non-null operation.
            do
            {
                var operation = semanticModel.GetOperation(node, cancellationToken);
                if (operation != null)
                {
                    return operation;
                }
 
                node = node.Parent;
            }
            while (node != null);
 
            return null;
        }
    }
}