void UUserDefinedStruct::SerializeTaggedProperties(FArchive& Ar, uint8* Data, UStruct* DefaultsStruct, uint8* Defaults, const UObject* BreakRecursionIfFullyLoad) const
{
#if WITH_EDITOR
/* The following code is responsible for UUserDefinedStruct's default values serialization. */
auto UDDefaultsStruct = Cast<UUserDefinedStruct>(DefaultsStruct);
const bool bDuplicate = (0 != (Ar.GetPortFlags() & PPF_Duplicate));
/* When saving delta, we want the difference between current data and true structure's default values.
When Defaults is NULL then zeroed data will be used for comparison.*/
const bool bUseNewDefaults = !Defaults
&& UDDefaultsStruct
&& Ar.DoDelta()
&& Ar.IsSaving()
&& !bDuplicate
&& !Ar.IsCooking();
/* Object serialized from delta will have missing properties filled with zeroed data,
we want structure's default data instead */
const bool bLoadDefaultFirst = UDDefaultsStruct
&& !bDuplicate
&& Ar.IsLoading();
const bool bPrepareDefaultStruct = bUseNewDefaults || bLoadDefaultFirst;
FStructOnScope StructDefaultMem(bPrepareDefaultStruct ? UDDefaultsStruct : NULL);
if (bPrepareDefaultStruct)
{
FStructureEditorUtils::Fill_MakeStructureDefaultValue(UDDefaultsStruct, StructDefaultMem.GetStructMemory());
}
if (bUseNewDefaults)
{
Defaults = StructDefaultMem.GetStructMemory();
}
if (bLoadDefaultFirst)
{
if (Defaults == nullptr)
{
Defaults = StructDefaultMem.GetStructMemory();
}
UDDefaultsStruct->CopyScriptStruct(Data, Defaults);
}
#endif // WITH_EDITOR
Super::SerializeTaggedProperties(Ar, Data, DefaultsStruct, Defaults);
}
