Modules & Packages
Crate structure, modules (mod), pub visibility, use keyword, Cargo.toml, workspaces
1Which file is the root of a library crate in Rust?
Which file is the root of a library crate in Rust?
Odpowiedź
The src/lib.rs file is the conventional entry point for a Rust library. Cargo automatically recognizes it as the library crate root. This file declares the public modules of the library and defines the API exposed to crate users.
2Which keyword is used to declare a submodule in a Rust file?
Which keyword is used to declare a submodule in a Rust file?
Odpowiedź
The mod keyword is used to declare a module. It can be followed by a block containing the module code, or simply the module name if the code is in a separate file. Cargo then automatically looks for the corresponding file.
3By default, what is the visibility of items (functions, structs, etc.) in a Rust module?
By default, what is the visibility of items (functions, structs, etc.) in a Rust module?
Odpowiedź
In Rust, all items are private by default. This design decision promotes encapsulation and forces developers to be explicit about what should be publicly exposed. The pub keyword must be used to make an item accessible from outside the module.
Which syntax allows importing a type and using it without a path prefix?
What does the crate:: path prefix mean at the beginning of an import?
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