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// 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
{
/// <summary>
/// Represents the nullability of values that can be assigned
/// to an expression used as an lvalue.
/// </summary>
// Review docs: https://github.com/dotnet/roslyn/issues/35046
public enum NullableAnnotation : byte
{
/// <summary>
/// The expression has not been analyzed, or the syntax is
/// not an expression (such as a statement).
/// <para>There are a few different reasons the expression could have not been analyzed:
/// </para>
/// <list type="number">
/// <item><description>The symbol producing the expression comes from a method that has not been annotated, such as invoking a C# 7.3 or earlier method, or a method in this compilation that is in a disabled context.</description></item>
/// <item><description>Nullable is completely disabled in this compilation.</description></item>
/// </list>
/// </summary>
None = 0,
/// <summary>
/// The expression is not annotated (does not have a ?).
/// </summary>
NotAnnotated,
/// <summary>
/// The expression is annotated (does have a ?).
/// </summary>
Annotated,
}
}
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