Unrecognized type 'void' in function library

Development Programming & Scripting C++
1

UE4 version: 4.20.

Using the FORCEINLINE in my function library causes the following compile error:

I do have multiple functions in my library but they have a reutnr type of FVector, bool, or float. This void function doesn’t seem to compile and I’m not sure why. Here’s the function definiton:



UFUNCTION()
static FORCEINLINE void SomeFunctionName(UBoxComponent* Collision, UStaticMeshComponent* MeshComponent)
{
    // Do something
}

I’m not sure what’s causing this compile error, and was hoping that some of you might be able to guide me towards a solution.

**NOTE: **changing the function to return bool instead of being a void function, does seem to resolve the issue, however I’m not interested in returning anything.

2

you can try remove
FORCEINLINE recompile again.

3

I think FORCEINLINE has to go before static for UHT to parsed it correctly.

4

@thinkthen It will compile if I remove the “FORCEINLINE”, but there’s a reason for it to be there.

@Zeblote Doesn’t seem to make any difference, still won’t compile and gives me the same compile error.

5

FORCEINLINE should be placed before the UFUNCTION declaration if you want it to compile. See a similar issue here: Unrecognized type 'void' in FORCEINLINE fucntion - Programming & Scripting - Unreal Engine Forums

But even if that works, I do not think UFUNCTIONs can be inlined to begin with. However, the body of a UFUNCTION should have no issue calling an inlined function. If someone can confirm that to be the case, then using FORCEINLINE with UFUNCTIONs might as well be redundant?

6

Thanks for your help guys, but I just removed FORCEINLINE and created the .cpp file. I just found a guide online explaining function libraries, and followed his steps, but I like to have the definiton split from the declaration anyways :slight_smile: