[C++] USTRUCT gives missing ';' error

Development Programming & Scripting
1

Hey there,

everytime i create a USTRUCT in one of my header files, i get this error:

http://puu.sh/h3qBr/fb8d060bc7.png

[ErrorPicture][2]

Here is my code:

#pragma once

#include "GameFramework/Actor.h"
#include "BaseRoomClass.generated.h"

namespace ERoomState
{
	enum Type
	{
		None,
		Normal,
		Corridor,
		Spawn,
		Boss,
	};
}

USTRUCT()
struct FRoomData
{
	GENERATED_USTRUCT_BODY()

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	FVector RoomSize;

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	ERoomState::Type RoomType;

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	TArray<FVector> DoorPositions;
};

UCLASS(BlueprintType, Blueprintable)
class SMALLCOOPTD_API ABaseRoomClass : public AActor
{
	GENERATED_BODY()
	
public:	

	UPROPERTY(EditDefaultsOnly, Category = "Room Config")
	FRoomData RoomConfig;

	FVector RoomCenter;

	FVector ExtendLeftBottom;
	FVector ExtendTopRight;

	// Sets default values for this actor's properties
	ABaseRoomClass();

	// Called when the game starts or when spawned
	virtual void BeginPlay() override;
	
	// Called every frame
	virtual void Tick( float DeltaSeconds ) override;

	
	
};

This is happening with every single USTRUCT and i am 100% sure that i don’t miss a “;”.

Sometimes it compiles and sometimes not. This is really annoying! The source seems to be the
“GENERATED_USTRUCT_BODY()”. As soon as i outcomment it, the error disappears (although without it i can’t compile the struct…)

I have other structs that work with the exact same setup. Where does this error come from? Is that my fault or is it a bug?

Engine Version: Newest launcher Download

I haven’t tested this in a new project, but i’m sure it will happen there too, since it is happening in a fresh and new class.

2

So, i just moved the ERoomState::Type to the normal body and it compiled. Then i moved it back to the USTRUCT, the error disappeared and it says it doesn’t know the Type. Which is normal since my custom namespace type is not a valid BP type i guess.

But all in all the ‘;’ disappeared. So it was never missing. The error is misleading and not really valid, since it disappeared with just moving some out of the struct and in again.

3

Added Ramas code for Enums (the normal code, but Ramas tutorial) and it still works. I was never missing the “;” ):

UENUM(BlueprintType)		//"BlueprintType" is essential to include
enum class ERoomType : uint8
{
	RT_None 		UMETA(DisplayName = "None"),
	RT_Normal 		UMETA(DisplayName = "None"),
	RT_Spawn 		UMETA(DisplayName = "None"),
	RT_Boss 		UMETA(DisplayName = "None"),
	RT_Corridor 	UMETA(DisplayName = "None")
};

USTRUCT(BlueprintType)
struct FRoomData
{
	GENERATED_USTRUCT_BODY()

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	FVector RoomSize;

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	ERoomType RoomType;

	UPROPERTY(EditDefaultsOnly, Category = "Room Settings")
	TArray<FVector> DoorPositions;
};

Maybe you can reproduce this error by creating the STRUCT like i did in the beginning and maybe find a better warning message then “missing ‘;’”

4

Hi ,

I have entered a feature request, UE-13932 to be considered by the development staff to clarify the UHT error present. The missing “;” is a quirk specific to intellisense.

5

Also, for those drawn to this via google. You can get a very similar error:

missing ;

On the end of the GENERATED_USTRUCT_BODY() line, if you fail to include the auto generated.h file in your class’s header file.
IE the #include "BaseRoomClass.generated.h" in the OP’s code (line 4).

6

The missing ; error is an intellisense error only, a false positive in most cases, ignore it, it will eventually catch up and remove the error, for me that is usually after compiling, sometimes it doesn’t go away until I reload VS…Sometimes it comes back… you will get alot of these “errors” as you work with UE and you projects get more complex.

7

Was struggling with this for the last hour. Spot on, thank you.