ImplementationDeclaration

Development Programming & Scripting C++
1

Hi,

I’ve just finished Lauren’s youtube tutorial series gettings started C++.

Since then alot has changed with the engine. I wanted to fix warnings.

I don’t understand what I’m supposed to do about this warning:

Im on UE4.7 Preview 2

Best regards,

2

Hi.

You should manually add OnPickedUp_Implementation() function in your .cpp file of Pickup class. Just like this:



void APickup::OnPickedUp_Implementation()
{
    ...
}

I have not seen the tutorial series you’re talking about so i can’t really tell you what should be inside the function. But i guess it was meant to be overridden in Blueprint, so it should be an empty function, if nothing had to be done in base class.

3

Hi,

That’s the way server rpc are usually defined, but since 4.7 the same code that used to work now generates those warnings.
I don’t understand the warning, but i am a c++ baby, so maybe it means something clear.

I started a similar thread a few hours ago.

Cheers
Cedric

4

Hi, ok thanks for the replies.

Header


UFUNCTION(BlueprintNativeEvent)
	void OnPickedUp();

.cpp


void APickup::OnPickedUp_Implementation()
{

}

I guess 4.7 issue then.

Thanks

5

Don’t have 4.7, but that warning seems pretty clear: It’s telling you to declare OnPickedUp_Implementation yourself because the UnrealHeaderTool will no longer do it come next version. The fix would be to declare both functions:


UFUNCTION(BlueprintNativeEvent)
void OnPickedUp();

virtual void OnPickedUp_Implementation();

CPP file remains the same, with only one definition for OnPickedUp_Implementation.

See if that works.

6

That was correct, thank you.

7

Wonder why they switch it?