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// Copyright 2018 Stefan Kroboth
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
use crate::math::ArgminEye;
use ndarray::Array2;
macro_rules! make_eye {
($t:ty) => {
impl ArgminEye for Array2<$t> {
#[inline]
fn eye_like(&self) -> Array2<$t> {
// TODO: Should return an error!
assert!(self.is_square());
ndarray::Array2::eye(self.dim().0)
}
#[inline]
fn eye(n: usize) -> Array2<$t> {
ndarray::Array2::eye(n)
}
}
};
}
make_eye!(isize);
make_eye!(usize);
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!(f32);
make_eye!(f64);
#[cfg(test)]
mod tests {
use super::*;
use ndarray::array;
use paste::item;
macro_rules! make_test {
($t:ty) => {
item! {
#[test]
fn [<test_eye_ $t>]() {
let e: Array2<$t> = <Array2<$t> as ArgminEye>::eye(3);
let res = array![
[1 as $t, 0 as $t, 0 as $t],
[0 as $t, 1 as $t, 0 as $t],
[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 = array![
[0 as $t, 2 as $t, 6 as $t],
[3 as $t, 2 as $t, 7 as $t],
[9 as $t, 8 as $t, 1 as $t]
];
let e: Array2<$t> = a.eye_like();
let res = array![
[1 as $t, 0 as $t, 0 as $t],
[0 as $t, 1 as $t, 0 as $t],
[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]
#[should_panic]
#[allow(unused)]
fn [<test_eye_like_panic_ $t>]() {
let a = array![
[0 as $t, 2 as $t, 6 as $t],
[3 as $t, 2 as $t, 7 as $t],
];
let e: Array2<$t> = a.eye_like();
}
}
};
}
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);
}