如何在不移出参数的情况下实现std::ops:add、sub、mul、div运算符之一?

我正在写一个光线跟踪器,我想能够减去我的三维向量:

use std::ops::Sub;

#[derive(Clone, Debug)]
pub struct Vec3 {
    pub v: [f64; 3],
}

impl Sub for Vec3 {
    type Output = Vec3;

    fn sub(self, other: Vec3) -> Vec3 {
        Vec3 {
            v: [
                self.v[0] - other.v[0],
                self.v[1] - other.v[1],
                self.v[2] - other.v[2],
            ],
        }
    }
}

这似乎奏效了。但是,当我尝试使用它时:

fn main() {
    let x = Vec3 { v: [0., 0., 0.] };
    let y = Vec3 { v: [0., 0., 0.] };
    let a = x - y;
    let b = x - y;
}

我收到编者的投诉:

error[E0382]: use of moved value: `x`
  --> src/main.rs:26:13
   |
25 |     let a = x - y;
   |             - value moved here
26 |     let b = x - y;
   |             ^ value used here after move
   |
   = note: move occurs because `x` has type `Vec3`, which does not implement the `Copy` trait

error[E0382]: use of moved value: `y`
  --> src/main.rs:26:17
   |
25 |     let a = x - y;
   |                 - value moved here
26 |     let b = x - y;
   |                 ^ value used here after move
   |
   = note: move occurs because `y` has type `Vec3`, which does not implement the `Copy` trait

如何编写减法运算符以使上面的代码工作?

请不要告诉我应该有一个现有的三维数学模块。我确信还有更好的东西,但我是在学习如何自己去学习语言之后。

How do I implement the Add trait for a reference to a struct? 没有帮助,因为它需要为我还没有指定的对象指定生命周期。