Complete guide to Modules and Crates in Rust
Let’s familiarize ourselves with the Rust Terminology first
What is Cargo?
Cargo is Rust’s package manager; it helps to download package’s dependencies, compile packages, and publish them to crates.io
What is a Crate?
A crate is a library - it is the smallest compilation unit in Rust
What is a Module?
Rust by Example has a very succinct explanation of what modules are in Rust
How can I create a module?
Suppose I have a client.rs file and I want to create two sub-modules (signatures and kinto_http)
we need to create a folder named “client” that contains signatures.rs and kinto_http.rs
and add both sub-modules at the top of client.rs using mod keyword
You can follow the same logic for creating any number of sub-modules
What about setting visibility of modules (exposing certain structs/traits)
As you can see above, using the pub keyword we can mark client as a public module and using pub use we can expose certain members within the module for public use
