//! Polyfill of parts of the standard library for `no_std` builds.
//!
//! All code in this subtree is derived from the standard library and licensed MIT or Apache 2.0
//! at your option.
//!
//! This implementation is used when `std` is not available and polyfills the necessary items from
//! `std`. When the `std` feature is specified (so the standard library is available), the file
//! `src/polyfill/std` is used instead, which just imports the respective items from `std`.