Modules and the Filesystem

Modules and the Filesystem

Rust’s module system organizes code into distinct namespaces and controls privacy.

The Modern Module Mapping

In modern Rust (2018/2021/2024 editions), declaring mod network; in src/main.rs resolves to src/network.rs or src/network/mod.rs.

// In src/network.rs
pub fn connect() {
    println!("Connecting to network host...");
}