Rust will automatically clean up data that’s left scope, but you can also manually accomplish this by the “drop” function, which is only necessary if you want t

Rust will automatically clean up data that’s left scope, but you can also manually accomplish this by the “drop” function, which is only necessary if you want to cleanup explicitly, such as in a different thread. Interestingly, the drop function is actually user-creatable. It’s actually an empty function with a very permissive Non-reference argument. The semantics of ownership in Rust makes that sufficient to trigger memory cleanup.