deinit for non copyable type

Asked on 01/20/2025

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In Swift, non-copyable types are introduced to express unique ownership, which is particularly useful for managing resources like files. A non-copyable type can have a deinitializer (deinit) that automatically handles cleanup, such as closing a file. This helps prevent runtime issues like multiple writers to the same file or resource leaks.

For more details on non-copyable types and their usage, you can refer to the session What’s new in Swift (17:29) and Consume noncopyable types in Swift (07:05). These sessions cover the concept of non-copyable types, their implementation, and how they can be used in Swift 6.