EmptyBox, a way to safely move values in and out of Boxs without

reallocations

EmptyBox is similar to a statically checked Box<Option<T>>:

```rust use empty_box::EmptyBox;

// A box with a string! let boxed = Box::new("Hello!".to_string());

// Oh no, we don't like that string. let (string, empty) = EmptyBox::take(boxed);

// Let's make an objectively superior string, and put it into the original // box. let superior = "Objectively superior string!".to_string();

// Now we have our superior string in the box! let boxed = empty.put(superior);

asserteq!("Hello!", string); asserteq!("Objectively superior string!", &*boxed); ```

Creating an EmptyBox from a Box and then putting a T back into the EmptyBox will avoid allocating a new Box, instead reusing whatever old Box the T was EmptyBox::taken from.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.