private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.Node is PropertyDeclarationSyntax propertyDeclaration &&
context.ContainingSymbol is IPropertySymbol property &&
property.ContainingType.IsAssignableTo(KnownSymbol.MarkupExtension, context.Compilation) &&
!Attribute.TryFind(propertyDeclaration, KnownSymbol.ConstructorArgumentAttribute, context.SemanticModel, context.CancellationToken, out _) &&
ConstructorArgument.TryGetParameterName(property, context.SemanticModel, context.CancellationToken, out var parameterName))
{
context.ReportDiagnostic(
Diagnostic.Create(
Descriptor,
propertyDeclaration.Identifier.GetLocation(),
ImmutableDictionary.CreateRange(new[] { new KeyValuePair <string, string>(nameof(ConstructorArgument), parameterName) }),
parameterName));
}
}
private static void Handle(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.Node is AttributeSyntax attribute)
{
if (Attribute.IsType(attribute, KnownSymbol.XmlnsDefinitionAttribute, context.SemanticModel, context.CancellationToken) &&
Attribute.TryFindArgument(attribute, 1, KnownSymbol.XmlnsDefinitionAttribute.ClrNamespaceArgumentName, out var arg) &&
context.SemanticModel.TryGetConstantValue(arg.Expression, context.CancellationToken, out string @namespace) &&
context.Compilation.GetSymbolsWithName(x => !string.IsNullOrEmpty(x) && @namespace.EndsWith(x), SymbolFilter.Namespace)
.All(x => x.ToMinimalDisplayString(context.SemanticModel, 0) != @namespace))
{
context.ReportDiagnostic(Diagnostic.Create(WPF0051XmlnsDefinitionMustMapExistingNamespace.Descriptor, arg.GetLocation(), arg));
}
else if (Attribute.IsType(attribute, KnownSymbol.MarkupExtensionReturnTypeAttribute, context.SemanticModel, context.CancellationToken) &&
context.ContainingSymbol is ITypeSymbol containingType &&
!containingType.IsAbstract &&
containingType.IsAssignableTo(KnownSymbol.MarkupExtension, context.Compilation) &&
attribute.TryFirstAncestor <ClassDeclarationSyntax>(out var classDeclaration) &&
MarkupExtension.TryGetReturnType(classDeclaration, context.SemanticModel, context.CancellationToken, out var returnType) &&
returnType != KnownSymbol.Object &&
Attribute.TryFindArgument(attribute, 0, "returnType", out arg) &&
arg.Expression is TypeOfExpressionSyntax typeOf &&
context.SemanticModel.TryGetType(typeOf.Type, context.CancellationToken, out var argType) &&
!ReferenceEquals(argType, returnType))
{
context.ReportDiagnostic(Diagnostic.Create(WPF0081MarkupExtensionReturnTypeMustUseCorrectType.Descriptor, arg.GetLocation(), returnType));
}
else if (Attribute.IsType(attribute, KnownSymbol.ConstructorArgumentAttribute, context.SemanticModel, context.CancellationToken) &&
ConstructorArgument.TryGetArgumentName(attribute, out var argument, out var argumentName) &&
attribute.TryFirstAncestor <PropertyDeclarationSyntax>(out var propertyDeclaration) &&
context.SemanticModel.TryGetSymbol(propertyDeclaration, context.CancellationToken, out var property) &&
ConstructorArgument.TryGetParameterName(property, context.SemanticModel, context.CancellationToken, out var parameterName) &&
argumentName != parameterName)
{
context.ReportDiagnostic(
Diagnostic.Create(
WPF0082ConstructorArgument.Descriptor,
argument.GetLocation(),
ImmutableDictionary.CreateRange(new[] { new KeyValuePair <string, string>(nameof(ConstructorArgument), parameterName) }),
parameterName));
}
