private static void HandleAssignment(SyntaxNodeAnalysisContext context)
{
if (!context.IsExcludedFromAnalysis() &&
context.Node is AssignmentExpressionSyntax {
Left : { } left
} assignment&&
!IsInObjectInitializer(assignment) &&
!IsInConstructor(assignment) &&
context.SemanticModel.TryGetSymbol(left, context.CancellationToken, out IPropertySymbol? property) &&
property != KnownSymbols.FrameworkElement.DataContext &&
ClrProperty.TrySingleBackingField(property, context.SemanticModel, context.CancellationToken, out var backing) &&
!IsAssignedCreatedInScope(left, context.SemanticModel, context.CancellationToken))
{
var propertyArgument = backing.CreateArgument(context.SemanticModel, context.Node.SpanStart).ToString();
context.ReportDiagnostic(
Diagnostic.Create(
Descriptors.WPF0041SetMutableUsingSetCurrentValue,
assignment.GetLocation(),
properties: ImmutableDictionary <string, string> .Empty.Add(
nameof(BackingFieldOrProperty),
propertyArgument),
propertyArgument,
assignment.Right));
}
}
private static void HandleAssignment(SyntaxNodeAnalysisContext context)
{
if (context.IsExcludedFromAnalysis())
{
return;
}
if (context.Node is AssignmentExpressionSyntax assignment)
{
if (IsInObjectInitializer(assignment) ||
IsInConstructor(assignment))
{
return;
}
var property = context.SemanticModel.GetSymbolSafe(assignment.Left, context.CancellationToken) as IPropertySymbol;
if (property == KnownSymbol.FrameworkElement.DataContext)
{
return;
}
if (ClrProperty.TrySingleBackingField(property, context.SemanticModel, context.CancellationToken, out var fieldOrProperty))
{
if (IsCalleePotentiallyCreatedInScope(assignment.Left as MemberAccessExpressionSyntax, context.SemanticModel, context.CancellationToken))
{
return;
}
var propertyArg = fieldOrProperty.CreateArgument(context.SemanticModel, context.Node.SpanStart);
context.ReportDiagnostic(Diagnostic.Create(Descriptor, assignment.GetLocation(), propertyArg, assignment.Right));
}
}
}
internal static bool TryCreateProperty(AssignmentExpressionSyntax assignment, SemanticModel semanticModel, CancellationToken cancellationToken, out ArgumentSyntax result)
{
result = null;
var property = semanticModel.GetSymbolInfo(assignment.Left, cancellationToken).Symbol as IPropertySymbol;
if (ClrProperty.TrySingleBackingField(property, semanticModel, cancellationToken, out var fieldSymbol))
{
result = fieldSymbol.CreateArgument(semanticModel, assignment.SpanStart);
}
return(result != null);
}