我的矩阵实现

pub struct Matrix<const M: usize, const  N: usize, T: Num + Neg + Copy>(Box<[[T; N]; M]>);

impl<const M: usize, const  N: usize, T: Num + Neg + Copy> Index<(usize, usize)> for  Matrix<{M}, {N}, T> {
    type Output = T;

    fn index(&self, index: (usize, usize)) -> &Self::Output {
        &self.0[index.0][index.1]
    }
}

由矩阵定义列向量和行向量

type CVector<const N: usize, T> = Matrix<{1}, {N}, T>;
type RVector<const N: usize, T> = Matrix<{N}, {1}, T>;
impl<const N: usize, T: Num + Neg + Copy> Index<usize> for CVector<{N}, T> {
    type Output = T;

    fn index(&self, index: usize) -> &Self::Output {
        &self[(0,index)]
    }
}

impl<const N: usize, T: Num + Neg + Copy> Index<usize> for RVector<{N}, T> {
    type Output = T;

    fn index(&self, index: usize) -> &Self::Output {
        &self[(index,0)]
    }
}

错误

error[E0119]: conflicting implementations of trait `Index<usize>` for type `matrix::Matrix<1, 1, _>`
  --> src/vector.rs:38:1
   |
30 | impl<const N: usize, T: Num + Neg + Copy> Index<usize> for CVector<{N}, T> {
   | -------------------------------------------------------------------------- first implementation here
...
38 | impl<const N: usize, T: Num + Neg + Copy> Index<usize> for RVector<{N}, T> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `matrix::Matrix<1, 1, _>`

我知道模板专业化现在还不稳定。有什么技巧可以解决这个问题吗？
我尝试了模板专业化。