for a proper level generator, I need double arrays from c++. that’s why I’m rewriting the code in c++, alas, I can’t find documentation for the syntax, so I don’t know how to declare the mass of variables not from std c++. also, if you know how to view the nativized code, it would help a lot.
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In the meantime, good luck and happy developing! 
I think what you are looking for is TSubclassOf. Here’s an array of actor classes: TArray<TSubclassOf<AActor>>. When you want to add to this array from code, I believe you’ll have to use the StaticClass of your class. In this case: AActor::StaticClass. Alternatively, you could also use TArray<UClass*>.