Learn Rust the Right Way
6 hours ago
- #Rust
- #Modules
- #Programming
- Modules in Rust help control scope and privacy by organizing code within a crate.
- Key concepts include paths, the `use` keyword, the `pub` keyword, `as` keyword, external packages, and the glob operator.
- Modules can be declared in the crate root file (src/lib.rs or src/main.rs) and can be nested.
- The compiler looks for module code in specific locations: inline, in a file named after the module, or in a mod.rs file.
- Paths allow referencing code in modules, e.g., `crate::garden::vegetables::Asparagus`.
- Modules are private by default; use `pub mod` to make them public.
- The `use` keyword creates shortcuts to reduce path repetition.
- Example provided: a `backyard` crate with modules for `garden` and `vegetables`.
- Modules improve code organization, readability, and reuse, while controlling privacy.
- Example of a restaurant crate demonstrates grouping related code into modules like `front_of_house` and `back_of_house`.
- The module tree structure resembles a filesystem directory tree, with parent-child relationships between modules.