UHT/UBT incorrectly uses TEnumAsByte<> in Generated.CPP

Development Programming & Scripting
1

I’ve created an enum and a BlueprintNativeEvent that takes this enum as an argument. Unfortunately when I try to compile the game, compilation fails because the Game.Generated.Cpp file swaps out the argument for a TEnumAsByte instead of a regular enum.

If I manually edit the Generated.CPP file, I can compile - but this is obviously not a good workaround. I don’t want to change my enum to the old ::Type style, since that’ll be a breaking change for other parts of the code.

This is the code I have written:
– .H

UENUM(BlueprintType)
enum class EMissionActivityEvent : uint8
{
	ME_None			UMETA(DisplayName = "None"),
	ME_Scheduled	UMETA(DisplayName = "Scheduled"),
	ME_Created		UMETA(DisplayName = "Created"),
	ME_Completed	UMETA(DisplayName = "Completed"),
	ME_Failed		UMETA(DisplayName = "Failed"),
};

UFUNCTION(BlueprintNativeEvent, Category = "Game Widgets")
void OnMissionNotificationAdded(const EMissionActivityEvent& MissionEvent, const FActiveMission& MissionData);
virtual void OnMissionNotificationAdded_Implementation(const EMissionActivityEvent& MissionEvent, const FActiveMission& MissionData);

-- CPP:

void UGESGame_InGameWidget::OnMissionNotificationAdded_Implementation(const EMissionActivityEvent& MissionEvent, const FActiveMission& MissionData)
{
	// Code Goes Here
}

And THIS is what the GESGame.Generated.CPP file generates for that UFUNCTION, which as you can see is incorrect:

void UGESGame_InGameWidget::OnMissionNotificationAdded(const TEnumAsByte<EMissionActivityEvent>& MissionEvent, const FActiveMission& MissionData)
	{
		GESGame_InGameWidget_eventOnMissionNotificationAdded_Parms Parms;
		Parms.MissionEvent=MissionEvent;
		Parms.MissionData=MissionData;
		ProcessEvent(FindFunctionChecked(GESGAME_OnMissionNotificationAdded),&Parms);
	}

This stops my game from compiling, but i can change the Generated file and it will compile and run fine.

2

Hi, I also have this problem, and apart from manually changing this, do you know if there is a solution for this yet? maybe some meta parameter that needs to be added to create the proper .generated file?
Thanks

3

Don’t edit auto generated files ever, there’s no guarantee it won’t be regenerated which would overwrite your manual changes. Have you tried with a non const-ref instead? So in the example above void OnMissionNotificationAdded(const EMissionActivityEvent MissionEvent, const FActiveMission& MissionData); or void OnMissionNotificationAdded(EMissionActivityEvent MissionEvent, const FActiveMission& MissionData);