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BindUFunction with Variable Capture in C++

Is this possible? If yes, how is it done?

Thanks!

Product Version: UE 4.18 Preview
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asked Oct 16 '17 at 03:18 AM in C++ Programming

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calembendell
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avatar image calembendell Oct 19 '17 at 02:11 PM

is bumping possible?

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You could bind a lambda and then capture what you want. Even if it needs to be an UFunction just make a wrapped with the lambda and call your inner UFunction with the captured members.

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answered Oct 16 '17 at 06:18 AM

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Moss
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avatar image calembendell Oct 16 '17 at 02:33 PM

Hey Moss, would it be possible for you to post a code snippet showing how to do that? I'm having a hard time figuring out how to get a UFunction pointer from a lambda. Thanks!

avatar image Moss Oct 24 '17 at 10:34 AM

You could do something like:

 void UMyClass::FunctionWithVar(const FString& MyVar, TFunction<void(const FString&)> InFunction)
 {
     MyLambdaHandle = OnMyDelegate.BindStatic([MyVar](TFunction<void(const FString&)> callback) {
         callback(MyVar);
     }, InFunction);
 
     // TODO: You have to track MyLambdaHandle to be able to unregister it when needed
 }

Note: It's all hand written and may not compile

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