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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
use core::*;
use std::{
fmt,
ops::Range,
};
#[derive(Debug, PartialEq, Eq, Clone, Copy, Serialize, Deserialize)]
pub struct Binary;
impl Binary {
pub fn new() -> Binary { Binary }
}
impl Space for Binary {
type Value = bool;
fn dim(&self) -> usize { 1 }
fn card(&self) -> Card { Card::Finite(2) }
}
impl BoundedSpace for Binary {
type BoundValue = bool;
fn inf(&self) -> Option<bool> { Some(false) }
fn sup(&self) -> Option<bool> { Some(true) }
fn contains(&self, _: Self::Value) -> bool { true }
}
impl FiniteSpace for Binary {
fn range(&self) -> Range<Self::Value> { false..true }
}
impl_auto_enclose!(Binary, Binary);
impl Surjection<bool, bool> for Binary {
fn map(&self, val: bool) -> bool { val }
}
impl Surjection<f64, bool> for Binary {
fn map(&self, val: f64) -> bool { val > 0.0 }
}
impl fmt::Display for Binary {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{{0, 1}}")
}
}
#[cfg(test)]
mod tests {
extern crate serde_test;
use self::serde_test::{assert_tokens, Token};
use super::*;
#[test]
fn test_card() {
let d = Binary::new();
assert_eq!(d.card(), Card::Finite(2));
}
#[test]
fn test_bounds() {
let d = Binary::new();
assert_eq!(d.inf().unwrap(), false);
assert_eq!(d.sup().unwrap(), true);
assert!(d.contains(false));
assert!(d.contains(true));
}
#[test]
fn test_range() {
let d = Binary::new();
let r = d.range();
assert!(r == (false..true) || r == (true..false));
}
#[test]
fn test_surjection() {
let d = Binary::new();
assert_eq!(d.map(true), true);
assert_eq!(d.map(false), false);
assert_eq!(d.map(1.0), true);
assert_eq!(d.map(0.0), false);
}
#[test]
fn test_serialisation() {
let d = Binary::new();
assert_tokens(&d, &[Token::UnitStruct { name: "Binary" }]);
}
}