How to pass Enum Bitflags as parameter of UFUNCTION with default value

Development Programming & Scripting
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5

I think you pointed out.
To answer your question the error I get was :

Cannot initialize parameter 'Filter' of type int32 with EThingFilter

And When I try Your code I’ve got :

Cannot initialize parameter 'Filter' of type uint8 with EThingFilter

So You’ve pointed out the thing.

it doesn’t want to make the implicit int conversion

And now if I do :

uint8 Filter = StaticCast<uint8>(EThingFilter::OddId | EThingFilter::OnlyAlphaName)

UHT complains that :

C++ Default parameter not parsed: Filter 'StaticCast<uint8>(EThingFilter::OddId | EThingFilter::OnlyAlphaName)' [UnrealHeaderTool Error

So I tried to StaticCast to uint8 with :

UFUNCTION(BlueprintCallable, Category="Test")
	TArray<UDTFluxThing*> FilterThings(UPARAM(meta = (Bitmask, BitmaskEnum = "EThingFilter")) int32 Filter = StaticCast<uint8>(EThingFilter::OddId | EThingFilter::OnlyAlphaName));

Resulting in the same error.
And then I removed the exposition to blueprint like so :

UFUNCTION()
	TArray<UDTFluxThing*> FilterThings(UPARAM(meta = (Bitmask, BitmaskEnum = "EThingFilter")) int32 Filter = StaticCast<uint8>(EThingFilter::OddId | EThingFilter::OnlyAlphaName));

And then it compiles. But can’t test it has it’s not exposed in BP… But Maybe it can help understand.