A crate containing a singly-linked list.
As of 0.4.1, cons-rs supports #[no_std] environments.
Note that it still depends on the alloc crate.
This version locks the entire immutable module behind a crate feature.
It also flips the Extend and IntoIterator implementations, so
creating a list from [1, 2] and popping off of it will yield 1 and then 2.
This version is a full rewrite of the entire crate. It has migrated from its past as a "list of nested pairs" to what it has actually been the entire time, a singly-linked list.
The main reason I didn't publish this as a new crate is because all the names are taken, and the use cases are mostly the same.