swift-official-doc-autoclosure.swift

func myAutoclosure(auto: @autoclosure @escaping () -> Void) -> () -> Void {
    return auto
}

let haha: () -> Void = myAutoclosure(auto: print("haha")) // autoclosure will not be called here even though it looks like we are calling it right away
print("haha should not be called yet")
haha()
print("haha should be called")

// haha should not be called yet
// haha
// haha should be called