ENums as UPROPERTY?

Development Programming & Scripting C++
1

Hello,

I got stuck at something when i was trying to program an inventory system, was trying to assign a slot to all of the items so they can be equipped differently (primary weapons, armors etc) so i added this in my item code



namespace EItemEquipSlot
{
	enum Type
	{
		eIES_PrimaryWeapon,
		eIES_SecondaryWeapon,
		eIES_MeleeWeapon,
		eIES_Head,
		eIES_Torso,
		eIES_Back,
		eIES_Arm,
		eIES_Waist,
		eIES_Hand,
		eIES_Leg,
		eIES_Foot,
	};
}

UPROPERTY(EditDefaultsOnly, Category = Inventory)
	EItemEquipSlot::Type EquipSlot;

but i get this error


error : In Item: Unrecognized type 'EItemEquipSlot'

meaning that it’s not possible to use ENums directly with UPROPERTY, is there any way to create a sub class for ENums to be used with UPROPERTY or what others ways can i try to do the same thing?

Thanks in advance.

2

Prefix your enum declaration with UENUM() (before the namespace in this case).

You might also want to wrap the actual property in TEnumAsByte<>.

Cheers,
Michael Noland

3

Assuming you’re okay using C++11, you don’t need the namespace workaround and can do like this:


UENUM(BlueprintType)
enum class EHeadLookCameraMode: uint8 {
	...
};

The uint8 part is important, as is the BlueprintType specifier if you want to access the property within a blueprint.
Maybe Michael can confirm, but I think assuming you do it this way, TEnumAsByte is no longer required.

4

Thanks for the help Michael and kamrann! Is there also another way to use structs under a namespace?

Something like:

But returns an error

EDIT: Using USTRUCT before namespace didn’t work.

5

UnrealHeaderTool only understands namespaces for the namespaced enum trick; it can’t handle them in any other context.

Cheers,
Michael Noland