C++ static array of enum?

Development Programming & Scripting
3

This might not be exactly what you want but you can create static arrays like this:

UENUM(BlueprintType)
namespace EObjective
{
	enum Type
	{
		// Numeric
		CaptureReactor = 0		UMETA(DisplayName = "Capture Reactor"),
		CaptureFlag 			UMETA(DisplayName = "Capture Flag"),
		PickUpReactor			UMETA(DisplayName = "Pick Up Reactor"),
		PickUpFlag				UMETA(DisplayName = "Pick Up Flag"),

		// This must always be at the end
		Max						UMETA(DisplayName = "Invalid")
	};
}

Then:

UPROPERTY(EditDefaultsOnly, Category = Rewards)
int32 ObjectiveRewards[EObjective::Max];

The only drawback I know is that you can’t expose the static array into BluePrints. But you can make a function like:

UFUNCTION(BlueprintCallable, Category = Rewards)
int32 YourClass::GetObjectiveReward(EObjective::Type inObjectiveType) const
{
	return ObjectiveRewards[inObjectiveType];
}

The great thing about this way is that the Editor automatically shows the static array in a very readable way. Instead of a typical TArray where it would show

ObjectiveRewards
0: 40
1: 250
2: 400
3: 70

it shows the enum name + value:

ObjectiveRewards
CaptureReactor: 40
CaptureFlag : 250
PickUpReactor: 400
PickUpFlag: 70

You can iterate through the array:

for(int32 i  = 0; i < EObjective::Type::Max; ++i)
{
	UE_LOG(LogTemp, Log, TEXT("Array value: %d"), ObjectiveRewards[i]);
}