rsdiff_math/num/
traits.rs

1/*
2    Appellation: num <module>
3    Contrib: FL03 <jo3mccain@icloud.com>
4*/
5use paste::paste;
6
7pub trait NaturalNumber {
8    fn harmonic(&self) -> f64;
9}
10
11macro_rules! natural {
12    ($($n:tt),*) => {
13        $(natural!(@impl $n);)*
14    };
15    (@impl $n:tt) => {
16        paste! {
17            impl NaturalNumber for [<u$n>] {
18                fn harmonic(&self) -> f64 {
19                    let mut sum = 0.0;
20                    for i in 1..=*self {
21                        sum += (i as f64).recip();
22                    }
23                    sum
24                }
25            }
26
27            impl NaturalNumber for core::num::[<NonZeroU$n>] {
28                fn harmonic(&self) -> f64 {
29                    self.get().harmonic()
30                }
31            }
32        }
33    };
34}
35
36natural!(8, 16, 32, 64, 128, size);
rsdiff_math/num/traits.rs

rsdiff_math/num/
traits.rs
