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tutorial: only Owned types can have a Drop impl

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Daniel Micay 2013-03-28 18:40:44 -04:00
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@ -982,7 +982,9 @@ when it is collected.
If an object doesn't contain garbage-collected boxes, it consists of a single
ownership tree and is given the `Owned` trait which allows it to be sent
between tasks.
between tasks. Custom destructors can only be implemented directly on types
that are `Owned`, but garbage-collected boxes can still *contain* types with
custom destructors.
# Boxes