private static void AnalyzeCompilation(CompilationAnalysisContext context)
{
if (AssemblyHasPublicTypes(context.Compilation.Assembly))
{
INamedTypeSymbol comVisibleAttributeSymbol = WellKnownTypes.ComVisibleAttribute(context.Compilation);
if (comVisibleAttributeSymbol == null)
{
return;
}
AttributeData attributeInstance = context.Compilation.Assembly.GetAttributes().FirstOrDefault(a => a.AttributeClass.Equals(comVisibleAttributeSymbol));
if (attributeInstance != null)
{
if (attributeInstance.ConstructorArguments.Length > 0 &&
attributeInstance.ConstructorArguments[0].Kind == TypedConstantKind.Primitive &&
attributeInstance.ConstructorArguments[0].Value != null &
attributeInstance.ConstructorArguments[0].Value.Equals(true))
{
// Has the attribute, with the value 'true'.
context.ReportDiagnostic(Diagnostic.Create(RuleA, Location.None, context.Compilation.Assembly.Name));
}
}
else
{
// No ComVisible attribute at all.
context.ReportDiagnostic(Diagnostic.Create(RuleB, Location.None, context.Compilation.Assembly.Name));
}
}
return;
}
public ICompilationEndedAnalyzer OnCompilationStarted(Compilation compilation, Action <Diagnostic> addDiagnostic, CancellationToken cancellationToken)
{
if (AssemblyHasPublicTypes(compilation.Assembly))
{
var comVisibleAttributeSymbol = WellKnownTypes.ComVisibleAttribute(compilation);
if (comVisibleAttributeSymbol == null)
{
return(null);
}
var attributeInstance = compilation.Assembly.GetAttributes().FirstOrDefault(a => a.AttributeClass.Equals(comVisibleAttributeSymbol));
if (attributeInstance != null)
{
if (attributeInstance.ConstructorArguments.Length > 0 &&
attributeInstance.ConstructorArguments[0].Kind == TypedConstantKind.Primitive &&
attributeInstance.ConstructorArguments[0].Value != null &
attributeInstance.ConstructorArguments[0].Value.Equals(true))
{
// Has the attribute, with the value 'true'.
addDiagnostic(Diagnostic.Create(Rule, Location.None, string.Format(FxCopRulesResources.CA1017_AttributeTrue, compilation.Assembly.Name)));
}
}
else
{
// No ComVisible attribute at all.
addDiagnostic(Diagnostic.Create(Rule, Location.None, string.Format(FxCopRulesResources.CA1017_NoAttribute, compilation.Assembly.Name)));
}
}
return(null);
}
private static bool IsExplicitlyVisibleFromCom(IMethodSymbol methodSymbol, Compilation compilation)
{
if (!methodSymbol.IsExternallyVisible() || methodSymbol.IsGenericMethod)
{
return(false);
}
var comVisibleAttribute = WellKnownTypes.ComVisibleAttribute(compilation);
if (comVisibleAttribute == null)
{
return(false);
}
if (methodSymbol.GetAttributes().Any(attribute => attribute.AttributeClass.Equals(comVisibleAttribute)) ||
methodSymbol.ContainingType.GetAttributes().Any(attribute => attribute.AttributeClass.Equals(comVisibleAttribute)))
{
return(true);
}
return(false);
}
