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use crate::ArgminSignum;
use num_complex::Complex;
macro_rules! make_signum {
($t:ty) => {
impl ArgminSignum for Vec<$t> {
fn signum(mut self) -> Self {
for x in &mut self {
*x = x.signum();
}
self
}
}
};
}
macro_rules! make_signum_complex {
($t:ty) => {
impl ArgminSignum for Vec<$t> {
fn signum(mut self) -> Self {
for x in &mut self {
x.re = x.re.signum();
x.im = x.im.signum();
}
self
}
}
};
}
make_signum!(isize);
make_signum!(i8);
make_signum!(i16);
make_signum!(i32);
make_signum!(i64);
make_signum!(f32);
make_signum!(f64);
make_signum_complex!(Complex<isize>);
make_signum_complex!(Complex<i8>);
make_signum_complex!(Complex<i16>);
make_signum_complex!(Complex<i32>);
make_signum_complex!(Complex<i64>);
make_signum_complex!(Complex<f32>);
make_signum_complex!(Complex<f64>);
#[cfg(test)]
mod tests {
use super::*;
use paste::item;
macro_rules! make_test {
($t:ty) => {
item! {
#[test]
fn [<test_signum_complex_ $t>]() {
let x = vec![
Complex::new(1 as $t, 2 as $t),
Complex::new(4 as $t, -3 as $t),
Complex::new(-8 as $t, 4 as $t),
Complex::new(-8 as $t, -1 as $t),
];
let y = vec![
Complex::new(1 as $t, 1 as $t),
Complex::new(1 as $t, -1 as $t),
Complex::new(-1 as $t, 1 as $t),
Complex::new(-1 as $t, -1 as $t),
];
let res = <Vec<Complex<$t>> as ArgminSignum>::signum(x);
for i in 0..4 {
let tmp = y[i] - res[i];
let norm = ((tmp.re * tmp.re + tmp.im * tmp.im) as f64).sqrt();
assert!(norm < std::f64::EPSILON);
}
}
}
item! {
#[test]
fn [<test_signum_ $t>]() {
let x = vec![1 as $t, -4 as $t, 8 as $t];
let y = vec![1 as $t, -1 as $t, 1 as $t];
let res = <Vec<$t> as ArgminSignum>::signum(x);
for i in 0..3 {
let diff = (y[i] - res[i]).abs() as f64;
assert!(diff < std::f64::EPSILON);
}
}
}
};
}
make_test!(isize);
make_test!(i8);
make_test!(i16);
make_test!(i32);
make_test!(i64);
make_test!(f32);
make_test!(f64);
}