The SliceVec crate

SliceVec provides a dynamically growing vector using an external slice as the backing storage. This means that SliceVec is completely allocation-free and can be used in no_std environments.

In contrast to the very similar arrayvec crate, the user must provide the backing storage (which can reside anywhere in writable memory), it is not created automatically. While this makes SliceVec a bit less ergonomic since it requires more boilerplate code to use, it works with any size of slice (fixed-size array are limited to a fixed set of sizes, due to Rust's lack of integer generics).