2 releases
Uses old Rust 2015
0.1.1 | Jun 1, 2017 |
---|---|
0.1.0 | Jun 1, 2017 |
#631 in Memory management
7KB
69 lines
EmptyBox
, a way to safely move values in and out of Box
s without
reallocations
EmptyBox
is similar to a statically checked Box<Option<T>>
:
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);
assert_eq!("Hello!", string);
assert_eq!("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::take
n 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.