UBT can't parse nested template parameters

Development Programming & Scripting
1

The Unreal Build Tool can’t handle properties like this:

UPROPERTY(EditAnywhere, Category = MapSetup)
TArray<TSubclassOf<AMapPiece>> KeyAreas;

I have been ignoring this and just using UClass* instead. However, I have now hit this problem with an array of enums (to work around the fact that I can’t use enum bit flags):

UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = Setup)
TArray<TEnumAsByte<eExits>> ExitsList;

This generates the following error:

In MapPiece: Missing '>' in TEnumAsByte

If I remove the TEnumAsByte it says I can’t have a raw enum.

2

Actually, it can, as of this commit:

https://github.com/EpicGames/UnrealEngine/commit/90c50e0b3b07bf44dad704d100889d3f51674699

I don’t know version you are using though. But the redundant space (only the closing space is required, really) should work in any case.

Steve

3

Try putting spaces around the inner set of pointy braces, UHT currently can’t handle parsing >> correctly in the context of templates.

UPROPERTY(BlueprintReadWrite, EditAnywhere, Category = Setup)
TArray< TEnumAsByte<eExits> > ExitsList;