How to use a custom struct as Delegate parameter in C++?

Development Programming & Scripting
1

In c++, I want to use a custom struct as Delegate parameter and export the function to blueprint. How can I do it?

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If I want to use a custom structure as the third parameter in FFooDelegate, what should I fill in ?? with. Is there a specifier like “CustomStructureParam” in Function used for Delegate?

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Thanks:)

2

Unrecognized type ‘FSafeByte’ - type must be a UCLASS, USTRUCT or UENUM.

I use UE4.10.0.

I use delegate(Foo) rather than direct function call(Foo2) because I want to do some async tasks in C++.

3

‘FSafeByte’ is just one of my custom structs;

USTRUCT(BlueprintType)
struct FSafeByte {
	GENERATED_USTRUCT_BODY()
    //...
};

If you want to pass a custom struct, you must of course create the struct type first. Then at the event body you can select the custom struct type as a param from the types list in Blueprint editor.

4

Sorry for my unclear expression. What I need is not “custom struct”, it should be “wildcard structure” as parameter in delegate.

I’m not willing to use an exact struct defined in C++. Structs should be defined in Blueprint with any structure. I have implemented a function in c++ using “wildcard struct” as output parameter, such as the following picture. I wonder if it can be used in delegate.

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In blueprint, the output “Structure” can be connected to any type of struct defined in blueprint. ConvertJsonStrToScriptStruct uses struct linked to Structure node to parse json string.

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“CustomStructureParam” is function meta tag used to indicate wildcard struct. Is there a similar tag can be used in delegate?