Crate empty_box [−] [src]
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.
Structs
EmptyBox |
An "emptied" |