Modules in Rust are a way to organize code into logical groups. They also control the privacy of items, which is whether an item can be used by outside code (public) or is an internal implementation detail and not intended for public use (private).
The pub keyword is used to make an item public. Items that are not declared pub are private by default.
The use keyword is used to bring a path into scope. This allows you to refer to items in the path without having to fully qualify them.
Paths are used to name items in the module system. They can be absolute paths, which start at the crate root, or relative paths, which start from the current module.
The as keyword is used to rename an item when it is brought into scope with the use keyword.
External packages are crates that are not part of your own project. You can use the use keyword to bring items from external packages into scope.
The glob operator is used to match multiple items in a path.
Benefits
- Organization: Modules allow you to organize your code into logical groups, which makes it easier to understand and maintain.
- Privacy: Modules control the privacy of items, which helps to protect your implementation details from unwanted exposure.
- Reusability: Modules can be reused in other projects, which can save you time and effort.
- Security: Modules can help to improve the security of your code by preventing unauthorized access to sensitive data.
