[X] Warn on non compiled bindings

When XamlC can't compile a Binding due to missing x:DataType, log a warning. If you use TreatWarningsAsErrors, add XC10101 to WarningsNotAsErrors to avoid the build failing
dotnet · Dec 13, 2023 · d5bc45c · d5bc45c
1 parent 2c6be4a
commit d5bc45c
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/src/Controls/src/Build.Tasks/SetPropertiesVisitor.cs b/src/Controls/src/Build.Tasks/SetPropertiesVisitor.cs
@@ -389,8 +389,10 @@ static IEnumerable<Instruction> CompileBindingPath(ElementNode node, ILContext c
 				n = n.Parent as IElementNode;
 			}
 
-			if (dataTypeNode is null)
+			if (dataTypeNode is null) {
+				context.LoggingHelper.LogWarningOrError(10101, context.XamlFilePath, node.LineNumber, node.LinePosition, 0, 0, $"Binding could be compiled if x:DataType is specified", null);
 				yield break;
+			}
 
 			if (dataTypeNode is ElementNode enode
 				&& enode.XmlType.NamespaceUri == XamlParser.X2009Uri

diff --git a/src/Controls/tests/Xaml.UnitTests/Controls.Xaml.UnitTests.csproj b/src/Controls/tests/Xaml.UnitTests/Controls.Xaml.UnitTests.csproj
@@ -6,7 +6,7 @@
     <AssemblyName>Microsoft.Maui.Controls.Xaml.UnitTests</AssemblyName>
     <WarningLevel>4</WarningLevel>
     <NoWarn>0672;0219;0414;CS0436;CS0618</NoWarn>
-    <WarningsNotAsErrors>XC0618</WarningsNotAsErrors>
+    <WarningsNotAsErrors>XC0618;XC10101</WarningsNotAsErrors>
     <IsPackable>false</IsPackable>
     <DisableMSBuildAssemblyCopyCheck>true</DisableMSBuildAssemblyCopyCheck>
   </PropertyGroup>