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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.
// <Area> Nullable - Box-Unbox </Area>
// <Title> Nullable type with unbox box expr </Title>
// <Description>
// checking type of NotEmptyStructQA using is operator
// </Description>
// <RelatedBugs> </RelatedBugs>
//<Expects Status=success></Expects>
// <Code>
using System.Runtime.InteropServices;
using System;
internal class NullableTest
{
private static bool BoxUnboxToNQGen<T>(T o)
{
return ((object)o) == null;
}
private static bool BoxUnboxToQGen<T>(T? o) where T : struct
{
return ((T?)o) == null;
}
private static bool BoxUnboxToNQ(object o)
{
return o == null;
}
private static bool BoxUnboxToQ(object o)
{
return ((NotEmptyStructQA?)o) == null;
}
private static int Main()
{
NotEmptyStructQA? s = null;
if (BoxUnboxToNQ(s) && BoxUnboxToQ(s) && BoxUnboxToNQGen(s) && BoxUnboxToQGen(s))
return ExitCode.Passed;
else
return ExitCode.Failed;
}
}
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