protected override void EmbedCorrespondingComEventInterfaceMethodInternal(SyntaxNode syntaxNodeOpt, DiagnosticBag diagnostics, bool isUsedForComAwareEventBinding)
{
// If the event happens to belong to a class with a ComEventInterfaceAttribute, there will also be
// a paired method living on its source interface. The ComAwareEventInfo class expects to find this
// method through reflection. If we embed an event, therefore, we must ensure that the associated source
// interface method is also included, even if it is not otherwise referenced in the embedding project.
NamedTypeSymbol underlyingContainingType = ContainingType.UnderlyingNamedType;
foreach (var attrData in underlyingContainingType.GetAttributes())
{
if (attrData.IsTargetAttribute(underlyingContainingType, AttributeDescription.ComEventInterfaceAttribute))
{
bool foundMatch = false;
NamedTypeSymbol sourceInterface = null;
if (attrData.CommonConstructorArguments.Length == 2)
{
sourceInterface = attrData.CommonConstructorArguments[0].Value as NamedTypeSymbol;
if ((object)sourceInterface != null)
{
foundMatch = EmbedMatchingInterfaceMethods(sourceInterface, syntaxNodeOpt, diagnostics);
foreach (NamedTypeSymbol source in sourceInterface.AllInterfacesNoUseSiteDiagnostics)
{
if (EmbedMatchingInterfaceMethods(source, syntaxNodeOpt, diagnostics))
{
foundMatch = true;
}
}
}
}
if (!foundMatch && isUsedForComAwareEventBinding)
{
if ((object)sourceInterface == null)
{
// ERRID_SourceInterfaceMustBeInterface/ERR_MissingSourceInterface
EmbeddedTypesManager.Error(diagnostics, ErrorCode.ERR_MissingSourceInterface, syntaxNodeOpt, underlyingContainingType, UnderlyingEvent);
}
else
{
HashSet <DiagnosticInfo> useSiteDiagnostics = null;
sourceInterface.AllInterfacesWithDefinitionUseSiteDiagnostics(ref useSiteDiagnostics);
diagnostics.Add(syntaxNodeOpt == null ? NoLocation.Singleton : syntaxNodeOpt.Location, useSiteDiagnostics);
// ERRID_EventNoPIANoBackingMember/ERR_MissingMethodOnSourceInterface
EmbeddedTypesManager.Error(diagnostics, ErrorCode.ERR_MissingMethodOnSourceInterface, syntaxNodeOpt, sourceInterface, UnderlyingEvent.MetadataName, UnderlyingEvent);
}
}
break;
}
}
}
