1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
use crate::clone;
use std::ops::AddAssign;
#[derive(Clone, Default)]
pub struct Average {
total: f64,
counts: i32,
}
impl Average {
clone!(total, f64);
clone!(counts, i32);
#[inline]
#[must_use]
pub fn new(total: f64, counts: i32) -> Self {
debug_assert!(counts >= 0);
Self { total, counts }
}
#[inline]
#[must_use]
pub fn ave(&self) -> f64 {
if self.counts > 0 {
self.total / f64::from(self.counts)
} else {
0.0
}
}
}
impl AddAssign<Self> for Average {
#[inline]
fn add_assign(&mut self, rhs: Self) {
self.total += rhs.total;
self.counts += rhs.counts;
}
}
impl AddAssign<&Self> for Average {
#[inline]
fn add_assign(&mut self, rhs: &Self) {
self.total += rhs.total;
self.counts += rhs.counts;
}
}
impl AddAssign<f64> for Average {
#[inline]
fn add_assign(&mut self, rhs: f64) {
self.total += rhs;
self.counts += 1;
}
}