Rust 1.79.0-nightly
244da22fa

Crates and Modules

There is a new edition of the book and this is an old link.

Rust has a module system that enables the reuse of code in an organized fashion. A module is a namespace that contains definitions of functions or types, and you can choose whether those definitions are visible outside their module (public) or not (private).

A crate is a project that other people can pull into their projects as a dependency.

mod network {
    fn connect() {
    }
}

Here are the relevant sections in the new and old books:

• in the current edition: Ch 7.01 — mod and the Filesystem
• in the current edition: Ch 14.02 — Publishing a Crate to Crates.io
• In the first edition: Ch 3.25 — Crates and Modules