The boxing-arena crate provides a very simply reuse of Box allocation by keeping a vector a reusable Box allocations, that can be used when wanting to wrap a value in Box.

It would be sometimes easier to introduce boxing-arena in code bases where Box is already used extensively than to use an arena crate that affects type and life-time semantics more drastically.

Basic usage demonstration:

```rust // Prepare an long-lived arena: let mut ba = BoxingArena::new();

// ... per allocation ... :

// In place of using Box::new directly, we do: let boxedbigvalue = ba.rebox(big_value);

// Instead of letting Rust drop and deallocate the Box, we do: ba.unbox(boxedbigvalue); ```