// 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 Microsoft.CodeAnalysis.Editing;

namespace Microsoft.CodeAnalysis.CodeGeneration
{
    /// <summary>
    /// Annotation placed on <see cref="ITypeSymbol"/>s that the <see cref="SyntaxGenerator"/> converts to a node. This
    /// information tracks the original nullable state of the symbol and is used by metadata-as-source to determine if
    /// it needs to add <c>#nullable</c> directives in the file.
    /// </summary>
    internal sealed class NullableSyntaxAnnotation
    {
        /// <summary>
        /// For <c>string~</c> types.
        /// </summary>
        public static readonly SyntaxAnnotation Oblivious = new($"{nameof(NullableSyntaxAnnotation)}.{Oblivious}");
        /// <summary>
        /// For <c>string!</c> or <c>string?</c> types.
        /// </summary>
        public static readonly SyntaxAnnotation AnnotatedOrNotAnnotated = new($"{nameof(NullableSyntaxAnnotation)}.{AnnotatedOrNotAnnotated}");
    }
}
