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
63
64
65
66
67
68
#![allow(dead_code)]
use std::fmt::Display;
mod pcg32;
pub use pcg32::Pcg32;
#[derive(Clone, Copy, PartialEq, Debug)]
pub enum Rng {
Pcg32(Pcg32),
Default,
}
pub fn rng_pcg32() -> Rng {
Rng::Pcg32(Pcg32::default())
}
impl Display for Rng {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Rng::Pcg32(rng) => write!(f, "Rng(rng: {})", rng),
Rng::Default => write!(f, "Rng(default)"),
}
}
}
impl Default for Rng {
fn default() -> Self {
Self::Default
}
}
impl Rng {
pub fn next_u32(&mut self) -> u32 {
match self {
Rng::Pcg32(rng) => rng.next_u32(),
Rng::Default => panic!("`rmath::sampling::Rng::next_u32`: empty rng."),
}
}
pub fn next_u64(&mut self) -> u64 {
match self {
Rng::Pcg32(rng) => rng.next_u64(),
Rng::Default => panic!("`rmath::sampling::Rng::next_u64`: empty rng."),
}
}
pub fn next_f32(&mut self) -> f32 {
match self {
Rng::Pcg32(rng) => rng.next_f32(),
Rng::Default => panic!("`rmath::sampling::Rng::next_f32`: empty rng."),
}
}
pub fn next_f64(&mut self) -> f64 {
match self {
Rng::Pcg32(rng) => rng.next_f64(),
Rng::Default => panic!("`rmath::sampling::Rng::next_f64`: empty rng."),
}
}
pub fn advance(&mut self, steps: u64) {
match self {
Rng::Pcg32(rng) => rng.advance(steps),
Rng::Default => panic!("`rmath::sampling::Rng::advance`: empty rng."),
}
}
}