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use crate::core::math::ArgminEye;
macro_rules! make_eye {
($t:ty) => {
impl ArgminEye for Vec<Vec<$t>> {
#[allow(clippy::cast_lossless)]
#[inline]
fn eye_like(&self) -> Vec<Vec<$t>> {
let n = self.len();
let mut out = vec![vec![0 as $t; n]; n];
for i in 0..n {
out[i][i] = 1 as $t;
}
out
}
#[allow(clippy::cast_lossless)]
#[inline]
fn eye(n: usize) -> Vec<Vec<$t>> {
let mut out = vec![vec![0 as $t; n]; n];
for i in 0..n {
out[i][i] = 1 as $t;
}
out
}
}
};
}
make_eye!(f32);
make_eye!(f64);
make_eye!(i8);
make_eye!(i16);
make_eye!(i32);
make_eye!(i64);
make_eye!(u8);
make_eye!(u16);
make_eye!(u32);
make_eye!(u64);
make_eye!(isize);
make_eye!(usize);
#[cfg(test)]
mod tests {
use super::*;
use paste::item;
macro_rules! make_test {
($t:ty) => {
item! {
#[test]
fn [<test_eye_ $t>]() {
let e: Vec<Vec<$t>> = <Vec<Vec<$t>> as ArgminEye>::eye(3);
let res = vec![
vec![1 as $t, 0 as $t, 0 as $t],
vec![0 as $t, 1 as $t, 0 as $t],
vec![0 as $t, 0 as $t, 1 as $t]
];
for i in 0..3 {
for j in 0..3 {
assert!((((res[i][j] - e[i][j]) as f64).abs()) < std::f64::EPSILON);
}
}
}
}
item! {
#[test]
fn [<test_eye_like_ $t>]() {
let a = vec![
vec![0 as $t, 2 as $t, 6 as $t],
vec![3 as $t, 2 as $t, 7 as $t],
vec![9 as $t, 8 as $t, 1 as $t]
];
let e: Vec<Vec<$t>> = a.eye_like();
let res = vec![
vec![1 as $t, 0 as $t, 0 as $t],
vec![0 as $t, 1 as $t, 0 as $t],
vec![0 as $t, 0 as $t, 1 as $t]
];
for i in 0..3 {
for j in 0..3 {
assert!((((res[i][j] - e[i][j]) as f64).abs()) < std::f64::EPSILON);
}
}
}
}
};
}
make_test!(isize);
make_test!(usize);
make_test!(i8);
make_test!(u8);
make_test!(i16);
make_test!(u16);
make_test!(i32);
make_test!(u32);
make_test!(i64);
make_test!(u64);
make_test!(f32);
make_test!(f64);
}