Modules and Visibility

Modules

• One file = one module.
• Declaration: mod net; (optional pub).
• Import: use net.http.Client; (optional pub).

Modules are resolved by file path. A dotted path refers to nested modules.

Example:

net/http.bd

pub type Client { ... }

// file: app.bd
mod net;
use net.http.Client;

Visibility

• Private by default.
• pub exposes a symbol externally.

Items without pub are visible only inside their defining module.

Example:

pub type User { string name }
pub mod net;
pub use net.http.Client;

Example (private item):

type Secret { i32 value }
// Secret is not visible outside this module