Crates and Modules
https://doc.rust-lang.org/book/crates-and-modules.html
Rustはデフォルトがプライベートで、pub
をつけるとグローバルになる。
extern crate phrases as sayings; use sayings::japanese::greetings as ja_greetings; use sayings::japanese::farewells::*; use sayings::english::{self, greetings as en_greetings, farewells as en_farewells}; fn main() { println!("Hello in English; {}", en_greetings::hello()); println!("And in Japanese: {}", ja_greetings::hello()); println!("Goodbye in English: {}", english::farewells::goodbye()); println!("Again: {}", en_farewells::goodbye()); println!("And in Japanese: {}", goodbye()); }
でエラーが出たのだけど、原因は、mod farewells
にpub
をつけていないせいだった。
pub use self::greetings::hello; pub use self::farewells::goodbye; pub mod farewells; pub mod greetings;