warn on datatype explicitly null

dotnet · Dec 14, 2023 · f965259 · f965259
1 parent 27180c4
commit f965259
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Showing 5 changed files with 10 additions and 5 deletions.
diff --git a/src/Controls/samples/Directory.Build.props b/src/Controls/samples/Directory.Build.props
@@ -2,6 +2,7 @@
   <PropertyGroup>
     <SampleProject>true</SampleProject>
     <UseMaui Condition=" '$(UseWorkload)' == 'true' ">true</UseMaui>
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);XC10101;XC10102</WarningsNotAsErrors>
   </PropertyGroup>
   <Import Project="../../../Directory.Build.props" />
-</Project>
+</Project>
diff --git a/src/Controls/src/Build.Tasks/SetPropertiesVisitor.cs b/src/Controls/src/Build.Tasks/SetPropertiesVisitor.cs
@@ -397,7 +397,10 @@ static IEnumerable<Instruction> CompileBindingPath(ElementNode node, ILContext c
 			if (dataTypeNode is ElementNode enode
 				&& enode.XmlType.NamespaceUri == XamlParser.X2009Uri
 				&& enode.XmlType.Name == nameof(Microsoft.Maui.Controls.Xaml.NullExtension))
+			{
+				context.LoggingHelper.LogWarningOrError(10102, context.XamlFilePath, node.LineNumber, node.LinePosition, 0, 0, $"Binding could be compiled if x:DataType is not explicitly null", null);
 				yield break;
+			}
 
 			string dataType = null;
 

diff --git a/src/Controls/tests/Xaml.UnitTests/Controls.Xaml.UnitTests.csproj b/src/Controls/tests/Xaml.UnitTests/Controls.Xaml.UnitTests.csproj
@@ -5,8 +5,8 @@
     <RootNamespace>Microsoft.Maui.Controls.Xaml.UnitTests</RootNamespace>
     <AssemblyName>Microsoft.Maui.Controls.Xaml.UnitTests</AssemblyName>
     <WarningLevel>4</WarningLevel>
-    <NoWarn>0672;0219;0414;CS0436;CS0618</NoWarn>
-    <WarningsNotAsErrors>XC0618;XC10101</WarningsNotAsErrors>
+    <NoWarn>$(NoWarn);0672;0219;0414;CS0436;CS0618</NoWarn>
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);XC0618;XC10101;XC10102</WarningsNotAsErrors>
     <IsPackable>false</IsPackable>
     <DisableMSBuildAssemblyCopyCheck>true</DisableMSBuildAssemblyCopyCheck>
   </PropertyGroup>

diff --git a/src/Essentials/samples/Directory.Build.props b/src/Essentials/samples/Directory.Build.props
@@ -2,6 +2,7 @@
   <PropertyGroup>
     <SampleProject>true</SampleProject>
     <UseMaui Condition=" '$(UseWorkload)' == 'true' ">true</UseMaui>
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);XC10101;XC10102</WarningsNotAsErrors>
   </PropertyGroup>
   <Import Project="../../../Directory.Build.props" />
-</Project>
+</Project>
diff --git a/src/TestUtils/src/DeviceTests.Runners/TestUtils.DeviceTests.Runners.csproj b/src/TestUtils/src/DeviceTests.Runners/TestUtils.DeviceTests.Runners.csproj
@@ -7,7 +7,7 @@
     <AssemblyName>Microsoft.Maui.TestUtils.DeviceTests.Runners</AssemblyName>
     <!--<Nullable>enable</Nullable>-->
     <NoWarn>$(NoWarn);CA1416</NoWarn>
-    <WarningsNotAsErrors>XC10101</WarningsNotAsErrors>
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);XC10101;XC10102</WarningsNotAsErrors>
   </PropertyGroup>
 
   <ItemGroup>