149 lines
2.3 KiB
Markdown
149 lines
2.3 KiB
Markdown
1.
|
|
|
|
```rust
|
|
// in lib.rs
|
|
mod front_of_house {
|
|
mod hosting {
|
|
fn add_to_waitlist() {}
|
|
|
|
fn seat_at_table() {}
|
|
}
|
|
|
|
mod serving {
|
|
fn take_order() {}
|
|
|
|
fn serve_order() {}
|
|
|
|
fn take_payment() {}
|
|
|
|
fn complain() {}
|
|
}
|
|
}
|
|
```
|
|
|
|
2.
|
|
|
|
```rust
|
|
// in lib.rs
|
|
pub mod front_of_house {
|
|
pub mod hosting {
|
|
pub fn add_to_waitlist() {}
|
|
|
|
pub fn seat_at_table() {}
|
|
}
|
|
|
|
pub mod serving {
|
|
pub fn take_order() {}
|
|
|
|
pub fn serve_order() {}
|
|
|
|
pub fn take_payment() {}
|
|
|
|
// Maybe you don't want the guest hearing the your complaining about them
|
|
// So just make it private
|
|
fn complain() {}
|
|
}
|
|
}
|
|
|
|
pub fn eat_at_restaurant() {
|
|
// 绝对路径
|
|
crate::front_of_house::hosting::add_to_waitlist();
|
|
|
|
// 相对路径
|
|
front_of_house::hosting::add_to_waitlist();
|
|
}
|
|
```
|
|
|
|
3.
|
|
|
|
```rust
|
|
mod back_of_house {
|
|
fn fix_incorrect_order() {
|
|
cook_order();
|
|
super::front_of_house::serving::serve_order();
|
|
}
|
|
|
|
fn cook_order() {}
|
|
}
|
|
```
|
|
|
|
```rust
|
|
mod back_of_house {
|
|
fn fix_incorrect_order() {
|
|
cook_order();
|
|
crate::front_of_house::serving::serve_order();
|
|
}
|
|
|
|
fn cook_order() {}
|
|
}
|
|
```
|
|
|
|
4.
|
|
|
|
```rust
|
|
// in src/lib.rs
|
|
|
|
mod front_of_house;
|
|
mod back_of_house;
|
|
pub fn eat_at_restaurant() -> String {
|
|
front_of_house::hosting::add_to_waitlist();
|
|
|
|
back_of_house::cook_order();
|
|
|
|
String::from("yummy yummy!")
|
|
}
|
|
```
|
|
|
|
```rust
|
|
// in src/back_of_house.rs
|
|
|
|
use crate::front_of_house;
|
|
pub fn fix_incorrect_order() {
|
|
cook_order();
|
|
front_of_house::serving::serve_order();
|
|
}
|
|
|
|
pub fn cook_order() {}
|
|
```
|
|
|
|
```rust
|
|
// in src/front_of_house/mod.rs
|
|
|
|
pub mod hosting;
|
|
pub mod serving;
|
|
```
|
|
|
|
```rust
|
|
// in src/front_of_house/hosting.rs
|
|
|
|
pub fn add_to_waitlist() {}
|
|
|
|
pub fn seat_at_table() -> String {
|
|
String::from("sit down please")
|
|
}
|
|
```
|
|
|
|
```rust,editable
|
|
// in src/front_of_house/serving.rs
|
|
|
|
pub fn take_order() {}
|
|
|
|
pub fn serve_order() {}
|
|
|
|
pub fn take_payment() {}
|
|
|
|
// Maybe you don't want the guest hearing the your complaining about them
|
|
// So just make it private
|
|
fn complain() {}
|
|
```
|
|
|
|
5.
|
|
|
|
```rust
|
|
mod front_of_house;
|
|
|
|
fn main() {
|
|
assert_eq!(front_of_house::hosting::seat_at_table(), "sit down please");
|
|
assert_eq!(hello_package::eat_at_restaurant(),"yummy yummy!");
|
|
}
|
|
``` |