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[Feature Request] Allow Blueprints to create Dynamic (non-multicast) Delegates with retval

I would like to be able to expose a DECLARE_DYNAMIC_DELEGATE_RetVal_OneParam which my designers can implement in blueprint.

It's easy enough to create a function which follows the requirements, but it cannot be assigned (cannot be BlueprintAssignable).

I would use a multicast dynamic delegate BUT I need to be able to return a value (and multicast don't get retval options, for obvious reasons).

Not sure if the canonical method is to use a pass-by-reference value as an argument and use that as output, but that seems incredibly hacky.

 DECLARE_DYNAMIC_DELEGATE_RetVal_OneParam(TArray<float>, FMyDelegate, float, SomeData);
 
 class Blahblahblah : public AActor
 {
     GENERATED_BODY()
 
 public:
     Blahblahblah();
 
     UPROPERTY( /*BlueprintAssignable*/ )
         FMyDelegate PleaseLetMeAssignThis;
 }
Product Version: UE 4.8
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asked Aug 11 '15 at 12:22 AM in C++ Programming

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vikhik
227 12 17 28

avatar image JonathanLambert May 03 '18 at 07:31 PM

Yes Please.

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