// 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
 
using System;
using System.Composition;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.CodeAnalysis.Navigation;
 
[ExportWorkspaceServiceFactory(typeof(ISymbolNavigationService), ServiceLayer.Default), Shared]
internal sealed class DefaultSymbolNavigationServiceFactory : IWorkspaceServiceFactory
{
    private ISymbolNavigationService _singleton;
 
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public DefaultSymbolNavigationServiceFactory()
    {
    }
 
    public IWorkspaceService CreateService(HostWorkspaceServices workspaceServices)
    {
        _singleton ??= new DefaultSymbolNavigationService();
 
        return _singleton;
    }
}