Summary

In this chapter, we discussed embedding languages in Rust and vice versa. Rust is an incredibly useful programming language in its own right, but has been designed with care to interoperate with the existing language ecosystem. Delegating difficult concurrency work in a memory-unsafe environment into Rust is a powerful model. Mozilla's work on Firefox has shown that path to be fruitful. Likewise, there are decades' worth of well-tested libraries niche domains—weather modeling, physics, amusing programming games from the 1980s—that could, theoretically, be rewritten in Rust but are probably better incorporated behind safe interfaces.

This chapter is the last that aims to teach you a new, broad skill. If you've made it this far in the book, thank you. It's been a real pleasure writing for you. You should, hopefully, now have a solid foundation for doing low-level concurrency in Rust and the confidence to read through most Rust codebases you come across. There's a lot going on in Rust...