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use crate::algebra::linear::matrix::UpperTriangular;
use std::ops::Index;
use std::ops::IndexMut;
impl<T> Index<[usize; 2]> for UpperTriangular<T> {
type Output = T;
/// Gets the element in the matrix
///
///
/// # Example
/// ```
/// use mathru::algebra::linear::matrix::{General, UpperTriangular};
/// use mathru::matrix;
///
/// let m: UpperTriangular<f64> = matrix![ -7.0, 3.0;
/// 0.0, -5.0].into();
///
/// assert_eq!(3.0, m[[0, 1]])
/// ```
fn index(&self, index: [usize; 2]) -> &Self::Output {
&self.matrix[index]
}
}
impl<T> IndexMut<[usize; 2]> for UpperTriangular<T> {
/// Sets the element in the matrix
///
///
/// # Example
/// ```
/// use mathru::algebra::linear::matrix::{General, UpperTriangular};
/// use mathru::matrix;
///
/// let mut m: UpperTriangular<f64> = matrix![ -7.0, 3.0;
/// 0.0, -5.0].into();
///
/// m[[0, 1]] = -2.0;
///
/// assert_eq!(-2.0, m[[0, 1]])
/// ```
fn index_mut(&mut self, index: [usize; 2]) -> &mut Self::Output {
debug_assert!(index[1] >= index[0]);
&mut self.matrix[index]
}
}