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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::{ArgminZero, ArgminZeroLike};
use num::Zero;
impl<T> ArgminZeroLike for ndarray::Array1<T>
where
T: Zero + ArgminZero + Clone,
{
#[inline]
fn zero_like(&self) -> ndarray::Array1<T> {
ndarray::Array1::zeros(self.raw_dim())
}
// #[inline]
// fn zero() -> ndarray::Array1<T> {
// ndarray::Array1::zeros(0)
// }
}
impl<T> ArgminZeroLike for ndarray::Array2<T>
where
T: Zero + ArgminZero + Clone,
{
#[inline]
fn zero_like(&self) -> ndarray::Array2<T> {
ndarray::Array2::zeros(self.raw_dim())
}
// #[inline]
// fn zero() -> ndarray::Array2<T> {
// ndarray::Array2::zeros((0, 0))
// }
}
#[cfg(test)]
mod tests {
use super::*;
use ndarray::{array, Array1, Array2};
use paste::item;
macro_rules! make_test {
($t:ty) => {
// item! {
// #[test]
// fn [<test_zero_ $t>]() {
// let a = <Array1<$t> as ArgminZero>::zero();
// let b: Array1<$t> = array![];
// assert_eq!(a, b);
// }
// }
item! {
#[test]
fn [<test_zero_like_ $t>]() {
let t: Array1<$t> = array![];
let a = t.zero_like();
assert_eq!(t, a);
}
}
item! {
#[test]
fn [<test_zero_like_2_ $t>]() {
let a = (array![42 as $t, 42 as $t, 42 as $t, 42 as $t]).zero_like();
for i in 0..4 {
assert!(((0 as $t - a[i]) as f64).abs() < std::f64::EPSILON);
}
}
}
// item! {
// #[test]
// fn [<test_2d_zero_ $t>]() {
// let a = <Array2<$t> as ArgminZero>::zero();
// let b: Array2<$t> = Array2::zeros((0, 0));
// assert_eq!(a, b);
// }
// }
item! {
#[test]
fn [<test_2d_zero_like_ $t>]() {
let t: Array2<$t> = Array2::zeros((0, 0));
let a = t.zero_like();
assert_eq!(t, a);
}
}
item! {
#[test]
fn [<test_2d_zero_like_2_ $t>]() {
let a = (array![[42 as $t, 42 as $t], [42 as $t, 42 as $t]]).zero_like();
for i in 0..2 {
for j in 0..2 {
assert!(((0 as $t - a[(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);
}