// 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.
 
namespace Microsoft.CodeAnalysis.Host.Mef
{
    /// <summary>
    /// The layer of an exported service.  
    /// 
    /// If there are multiple definitions of a service, the <see cref="ServiceLayer"/> is used to determine which is used.
    /// </summary>
    public static class ServiceLayer
    {
        /// <summary>
        /// Service layer that overrides <see cref="Editor"/>, <see cref="Desktop"/> and <see cref="Default"/>.
        /// </summary>
        internal const string Test = nameof(Test);
 
        /// <summary>
        /// Service layer that overrides <see cref="Editor"/>, <see cref="Desktop"/> and <see cref="Default"/>.
        /// </summary>
        public const string Host = nameof(Host);
 
        /// <summary>
        /// Service layer that overrides <see cref="Desktop" /> and <see cref="Default"/>.
        /// </summary>
        public const string Editor = nameof(Editor);
 
        /// <summary>
        /// Service layer that overrides <see cref="Default"/>.
        /// </summary>
        public const string Desktop = nameof(Desktop);
 
        /// <summary>
        /// The base service layer.
        /// </summary>
        public const string Default = nameof(Default);
    }
}