From d8e78054b9c4ceeca71057afd56354cf74ff2fd5 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 01:00:04 +0100
Subject: [PATCH 1/4] Enable nullable:
 System.Management.Automation.Language.ITypeName

---
 src/System.Management.Automation/engine/parser/ast.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/System.Management.Automation/engine/parser/ast.cs b/src/System.Management.Automation/engine/parser/ast.cs
index b654ab0ccdc..fee5273adf4 100644
--- a/src/System.Management.Automation/engine/parser/ast.cs
+++ b/src/System.Management.Automation/engine/parser/ast.cs
@@ -8107,6 +8107,8 @@ internal override object Accept(ICustomAstVisitor visitor)
         }
     }
 
+#nullable enable
+
     /// <summary>
     /// The name and attributes of a type.
     /// </summary>
@@ -8155,6 +8157,8 @@ public interface ITypeName
         IScriptExtent Extent { get; }
     }
 
+#nullable restore
+
     internal interface ISupportsTypeCaching
     {
         Type CachedType { get; set; }

From 4b553a91808e1cbf204972a454c050f34e0890ad Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 19:03:50 +0100
Subject: [PATCH 2/4] Removing whitespace before/after nullable pragma

---
 src/System.Management.Automation/engine/parser/ast.cs | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/System.Management.Automation/engine/parser/ast.cs b/src/System.Management.Automation/engine/parser/ast.cs
index fee5273adf4..df26a3bba70 100644
--- a/src/System.Management.Automation/engine/parser/ast.cs
+++ b/src/System.Management.Automation/engine/parser/ast.cs
@@ -8108,7 +8108,6 @@ internal override object Accept(ICustomAstVisitor visitor)
     }
 
 #nullable enable
-
     /// <summary>
     /// The name and attributes of a type.
     /// </summary>
@@ -8156,7 +8155,6 @@ public interface ITypeName
         /// </summary>
         IScriptExtent Extent { get; }
     }
-
 #nullable restore
 
     internal interface ISupportsTypeCaching

From 31ee3434f391cf8f9ae339fef791d5a6100a9fa0 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 19:44:04 +0100
Subject: [PATCH 3/4] Removing whitespace before/after nullable pragma

---
 src/System.Management.Automation/engine/parser/ast.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/System.Management.Automation/engine/parser/ast.cs b/src/System.Management.Automation/engine/parser/ast.cs
index df26a3bba70..e0f54508091 100644
--- a/src/System.Management.Automation/engine/parser/ast.cs
+++ b/src/System.Management.Automation/engine/parser/ast.cs
@@ -8107,10 +8107,10 @@ internal override object Accept(ICustomAstVisitor visitor)
         }
     }
 
-#nullable enable
     /// <summary>
     /// The name and attributes of a type.
     /// </summary>
+#nullable enable
     public interface ITypeName
     {
         /// <summary>

From 808e39ac1c06b88a00f6a46799d1f9d67a481e80 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 20:44:34 +0100
Subject: [PATCH 4/4] Correcting nullability for return values

---
 src/System.Management.Automation/engine/parser/ast.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/System.Management.Automation/engine/parser/ast.cs b/src/System.Management.Automation/engine/parser/ast.cs
index e0f54508091..86ac01457f7 100644
--- a/src/System.Management.Automation/engine/parser/ast.cs
+++ b/src/System.Management.Automation/engine/parser/ast.cs
@@ -8126,7 +8126,7 @@ public interface ITypeName
         /// <summary>
         /// The name of the assembly, if specified, otherwise null.
         /// </summary>
-        string AssemblyName { get; }
+        string? AssemblyName { get; }
 
         /// <summary>
         /// Returns true if the type names an array, false otherwise.
@@ -8141,14 +8141,14 @@ public interface ITypeName
         /// <summary>
         /// Returns the <see cref="System.Type"/> that this typename represents, if such a type exists, null otherwise.
         /// </summary>
-        Type GetReflectionType();
+        Type? GetReflectionType();
 
         /// <summary>
         /// Assuming the typename is an attribute, returns the <see cref="System.Type"/> that this typename represents.
         /// By convention, the typename may omit the suffix "Attribute".  Lookup will attempt to resolve the type as is,
         /// and if that fails, the suffix "Attribute" will be appended.
         /// </summary>
-        Type GetReflectionAttributeType();
+        Type? GetReflectionAttributeType();
 
         /// <summary>
         /// The extent of the typename.