Nullable enable Razor components

src/Compiler/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.codegen.cs

@@ -10,7 +10,9 @@ namespace __GeneratedComponent
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class AspNetCore_3708c9fcd2e1ecb6cbaba92bcc60927f830690f42092c4aa1a7275c2f37020fd : global::Microsoft.AspNetCore.Components.ComponentBase, IDisposable
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {

src/Compiler/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.mappings.txt

@@ -1,23 +1,23 @@
 Source Location: (12:0,12 [11] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |IDisposable|
-Generated Location: (767:19,0 [11] )
+Generated Location: (813:21,0 [11] )
 |IDisposable|
 
 Source Location: (38:1,13 [15] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |this.ToString()|
-Generated Location: (1367:37,13 [15] )
+Generated Location: (1413:39,13 [15] )
 |this.ToString()|
 
 Source Location: (79:3,5 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |string.Format("{0}", "Hello")|
-Generated Location: (1564:45,6 [29] )
+Generated Location: (1610:47,6 [29] )
 |string.Format("{0}", "Hello")|
 
 Source Location: (132:6,12 [37] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |
     void IDisposable.Dispose(){ }
 |
-Generated Location: (1816:54,12 [37] )
+Generated Location: (1862:56,12 [37] )
 |
     void IDisposable.Dispose(){ }
 |

src/Compiler/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.codegen.cs

@@ -11,7 +11,9 @@ namespace __GeneratedComponent
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class AspNetCore_3708c9fcd2e1ecb6cbaba92bcc60927f830690f42092c4aa1a7275c2f37020fd : global::Microsoft.AspNetCore.Components.ComponentBase, IDisposable
+    #nullable disable
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(global::Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentCodeGenerationTestBase.cs

@@ -4877,6 +4877,95 @@ @preservewhitespace someVariable
         Assert.Collection(generated.Diagnostics, d => { Assert.Equal("RZ1038", d.Id); });
     }
 
+    [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/7169")]
+    public void InheritsDirective_NullableReferenceType()
+    {
+        // Arrange
+        AdditionalSyntaxTrees.Add(Parse("""
+            namespace Test;
+
+            public class BaseComponent<T> : Microsoft.AspNetCore.Components.ComponentBase
+            {
+                protected T _field = default!;
+            }
+            """));
+
+        // Act
+        var generated = CompileToCSharp("""
+            @inherits BaseComponent<string?>
+
+            <h1>My component</h1>
+            @(_field.ToString())
+            """,
+            nullableEnable: true);
+
+        // Assert
+        AssertDocumentNodeMatchesBaseline(generated.CodeDocument);
+        AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
+        var compiled = CompileToAssembly(generated, throwOnFailure: false);
+        if (DesignTime)
+        {
+            compiled.Diagnostics.Verify(
+                // x:\dir\subdir\Test\TestComponent.cshtml(4,7): warning CS8602: Dereference of a possibly null reference.
+                // __o = _field.ToString();
+                Diagnostic(ErrorCode.WRN_NullReferenceReceiver, "_field").WithLocation(4, 7));
+        }
+        else
+        {
+            compiled.Diagnostics.Verify(
+                // x:\dir\subdir\Test\TestComponent.cshtml(4,3): warning CS8602: Dereference of a possibly null reference.
+                // __builder.AddContent(1, _field.ToString());
+                Diagnostic(ErrorCode.WRN_NullReferenceReceiver, "_field").WithLocation(4, 3));
+        }
+    }
+
+    [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/7169")]
+    public void InheritsDirective_NullableReferenceType_NullableDisabled()
+    {
+        // Arrange
+        AdditionalSyntaxTrees.Add(Parse("""
+            namespace Test;
+
+            public class BaseComponent<T> : Microsoft.AspNetCore.Components.ComponentBase
+            {
+                protected T _field;
+            }
+            """));
+
+        // Act
+        var generated = CompileToCSharp("""
+            @inherits BaseComponent<string?>
+
+            <h1>My component</h1>
+            @(_field.ToString())
+            """,
+            nullableEnable: false,
+            throwOnFailure: false);
+
+        // Assert
+        Assert.Empty(generated.Diagnostics);
+        AssertDocumentNodeMatchesBaseline(generated.CodeDocument);
+        AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
+        var compiled = CompileToAssembly(generated, throwOnFailure: false);
+        if (DesignTime)
+        {
+            compiled.Diagnostics.Verify(
+                // x:\dir\subdir\Test\TestComponent.cshtml(1,21): warning CS8669: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.
+                // BaseComponent<string?> __typeHelper = default!;
+                Diagnostic(ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode, "?").WithLocation(1, 21),
+                // (14,62): warning CS8669: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.
+                //     public partial class TestComponent : BaseComponent<string?>
+                Diagnostic(ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode, "?").WithLocation(14, 62));
+        }
+        else
+        {
+            compiled.Diagnostics.Verify(
+                // (14,62): warning CS8669: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.
+                //     public partial class TestComponent : BaseComponent<string?>
+                Diagnostic(ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode, "?").WithLocation(14, 62));
+        }
+    }
+
     #endregion
 
     #region EventCallback
@@ -10219,12 +10308,12 @@ public class MyComponent : ComponentBase
             //                               x
             Diagnostic(ErrorCode.ERR_SyntaxError, "").WithArguments(",").WithLocation(1, 32),
             DesignTime
-            // (23,91): error CS1501: No overload for method 'TypeCheck' takes 2 arguments
+            // (27,91): error CS1501: No overload for method 'TypeCheck' takes 2 arguments
             //             __o = global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<global::System.String>(
-            ? Diagnostic(ErrorCode.ERR_BadArgCount, "TypeCheck<global::System.String>").WithArguments("TypeCheck", "2").WithLocation(25, 91)
-            // (17,138): error CS1501: No overload for method 'TypeCheck' takes 2 arguments
+            ? Diagnostic(ErrorCode.ERR_BadArgCount, "TypeCheck<global::System.String>").WithArguments("TypeCheck", "2").WithLocation(27, 91)
+            // (21,138): error CS1501: No overload for method 'TypeCheck' takes 2 arguments
             //             __builder.AddComponentParameter(1, "StringProperty", global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<global::System.String>(
-            : Diagnostic(ErrorCode.ERR_BadArgCount, "TypeCheck<global::System.String>").WithArguments("TypeCheck", "2").WithLocation(19, 138));
+            : Diagnostic(ErrorCode.ERR_BadArgCount, "TypeCheck<global::System.String>").WithArguments("TypeCheck", "2").WithLocation(21, 138));
         Assert.NotEmpty(generated.Diagnostics);
     }
 
@@ -10898,12 +10987,12 @@ @using Microsoft.AspNetCore.Components.Web
         AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
         var result = CompileToAssembly(generated, throwOnFailure: false);
         result.Diagnostics.Verify(DesignTime
-            // (39,85): error CS7036: There is no argument given that corresponds to the required parameter 'value' of 'RuntimeHelpers.TypeCheck<T>(T)'
+            // (41,85): error CS7036: There is no argument given that corresponds to the required parameter 'value' of 'RuntimeHelpers.TypeCheck<T>(T)'
             //             global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<string>();
-            ? Diagnostic(ErrorCode.ERR_NoCorrespondingArgument, "TypeCheck<string>").WithArguments("value", "Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<T>(T)").WithLocation(39, 85)
-            // (34,105): error CS7036: There is no argument given that corresponds to the required parameter 'value' of 'RuntimeHelpers.TypeCheck<T>(T)'
+            ? Diagnostic(ErrorCode.ERR_NoCorrespondingArgument, "TypeCheck<string>").WithArguments("value", "Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<T>(T)").WithLocation(41, 85)
+            // (36,105): error CS7036: There is no argument given that corresponds to the required parameter 'value' of 'RuntimeHelpers.TypeCheck<T>(T)'
             //             string __formName = global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<string>();
-            : Diagnostic(ErrorCode.ERR_NoCorrespondingArgument, "TypeCheck<string>").WithArguments("value", "Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<T>(T)").WithLocation(34, 105));
+            : Diagnostic(ErrorCode.ERR_NoCorrespondingArgument, "TypeCheck<string>").WithArguments("value", "Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<T>(T)").WithLocation(36, 105));
     }
 
     [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/9077")]

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDeclarationIntegrationTest.cs

@@ -125,7 +125,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(global::Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitBooleanConversion/TestComponent.codegen.cs

@@ -10,7 +10,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitBooleanConversion/TestComponent.mappings.txt

@@ -1,28 +1,28 @@
 Source Location: (26:0,26 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |c|
-Generated Location: (1110:27,26 [1] )
+Generated Location: (1156:29,26 [1] )
 |c|
 
 Source Location: (44:0,44 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |c|
-Generated Location: (1297:35,44 [1] )
+Generated Location: (1343:37,44 [1] )
 |c|
 
 Source Location: (13:0,13 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |MyParameter|
-Generated Location: (1543:45,13 [11] )
+Generated Location: (1589:47,13 [11] )
 |MyParameter|
 
 Source Location: (29:0,29 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |BoolParameter|
-Generated Location: (1780:54,29 [13] )
+Generated Location: (1826:56,29 [13] )
 |BoolParameter|
 
 Source Location: (60:2,7 [42] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private MyClass<string> c = new();
 |
-Generated Location: (2203:72,7 [42] )
+Generated Location: (2249:74,7 [42] )
 |
     private MyClass<string> c = new();
 |

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_Bind/TestComponent.codegen.cs

@@ -10,7 +10,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_Bind/TestComponent.mappings.txt

@@ -1,53 +1,53 @@
 Source Location: (55:1,19 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |true|
-Generated Location: (1103:27,19 [4] )
+Generated Location: (1149:29,19 [4] )
 |true|
 
 Source Location: (112:3,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |() => { }|
-Generated Location: (1280:35,23 [9] )
+Generated Location: (1326:37,23 [9] )
 |() => { }|
 
 Source Location: (145:4,21 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |c|
-Generated Location: (1452:43,21 [1] )
+Generated Location: (1498:45,21 [1] )
 |c|
 
 Source Location: (32:0,32 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |c|
-Generated Location: (1627:51,32 [1] )
+Generated Location: (1673:53,32 [1] )
 |c|
 
 Source Location: (40:1,4 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |BoolParameter|
-Generated Location: (2092:62,4 [13] )
+Generated Location: (2138:64,4 [13] )
 |BoolParameter|
 
 Source Location: (66:2,4 [15] x:\dir\subdir\Test\TestComponent.cshtml)
 |StringParameter|
-Generated Location: (2306:71,4 [15] )
+Generated Location: (2352:73,4 [15] )
 |StringParameter|
 
 Source Location: (93:3,4 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |DelegateParameter|
-Generated Location: (2522:80,4 [17] )
+Generated Location: (2568:82,4 [17] )
 |DelegateParameter|
 
 Source Location: (128:4,4 [15] x:\dir\subdir\Test\TestComponent.cshtml)
 |ObjectParameter|
-Generated Location: (2740:89,4 [15] )
+Generated Location: (2786:91,4 [15] )
 |ObjectParameter|
 
 Source Location: (19:0,19 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |MyParameter|
-Generated Location: (2971:98,19 [11] )
+Generated Location: (3017:100,19 [11] )
 |MyParameter|
 
 Source Location: (161:6,7 [42] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private MyClass<string> c = new();
 |
-Generated Location: (3392:116,7 [42] )
+Generated Location: (3438:118,7 [42] )
 |
     private MyClass<string> c = new();
 |

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_BindUnknown/TestComponent.codegen.cs

@@ -10,7 +10,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_BindUnknown/TestComponent.mappings.txt

@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |c|
-Generated Location: (985:27,26 [1] )
+Generated Location: (1031:29,26 [1] )
 |c|
 
 Source Location: (42:2,7 [34] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private MyClass c = new();
 |
-Generated Location: (1656:48,7 [34] )
+Generated Location: (1702:50,7 [34] )
 |
     private MyClass c = new();
 |

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_BindUnknown_Assignment/TestComponent.codegen.cs

@@ -10,7 +10,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_BindUnknown_Assignment/TestComponent.mappings.txt

@@ -1,14 +1,14 @@
 Source Location: (26:0,26 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |c1 = c2|
-Generated Location: (985:27,26 [7] )
+Generated Location: (1031:29,26 [7] )
 |c1 = c2|
 
 Source Location: (48:2,7 [68] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private MyClass c1 = new();
     private MyClass c2 = new();
 |
-Generated Location: (1674:48,7 [68] )
+Generated Location: (1720:50,7 [68] )
 |
     private MyClass c1 = new();
     private MyClass c2 = new();

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AddAttribute_ImplicitStringConversion_CustomEvent/TestComponent.codegen.cs

@@ -10,7 +10,9 @@ namespace Test
     using global::Microsoft.AspNetCore.Components;
     #line default
     #line hidden
+    #nullable restore
     public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {