独占引用

独占引用（也称为可变引用）允许更改其所引用的值。它们的类型为 &mut T。

fn main() {
    let mut point = (1, 2);
    let x_coord = &mut point.0;
    *x_coord = 20;
    println!("point: {point:?}");
}

This slide should take about 10 minutes.

关键点：

“独占模式”表示只有此引用可用于访问该值。在独占引用存在期间，不允许同时存在其他引用（无论是共享引用还是独占引用），并且无法访问引用的值。请尝试在 x_coord 处于活动状态时创建 &point.0 或更改 point.0。
Be sure to note the difference between let mut x_coord: &i32 and let x_coord: &mut i32. The first one represents a shared reference which can be bound to different values, while the second represents an exclusive reference to a mutable value.

Comprehensive Rust 🦀