espada 0.3.1

Texas Hold'em poker odds evaluator
Documentation 
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

use super::Rank;

// NOTE:
// ideally Rank struct should implement Step trait and achieve the same job but
// as of March 2024, Step trait is still marked as unstable. So this is only the
// decent workaround to do the equivalent thing for the time being.
// ref. https://github.com/rust-lang/rust/issues/42168

pub struct RankRange {
    start: usize,
    end: usize,
    inclusive: bool,
}

impl RankRange {
    pub fn new(start: Rank, end: Rank) -> RankRange {
        Self {
            start: u8::from(start) as usize,
            end: u8::from(end) as usize,
            inclusive: false,
        }
    }

    pub fn inclusive(start: Rank, end: Rank) -> RankRange {
        Self {
            start: u8::from(start) as usize,
            end: u8::from(end) as usize,
            inclusive: true,
        }
    }

    pub fn all() -> Self {
        Self {
            start: 0,
            end: RANKS.len(),
            inclusive: false,
        }
    }
}

const RANKS: [Rank; 13] = [
    Rank::Ace,
    Rank::King,
    Rank::Queen,
    Rank::Jack,
    Rank::Ten,
    Rank::Nine,
    Rank::Eight,
    Rank::Seven,
    Rank::Six,
    Rank::Five,
    Rank::Four,
    Rank::Trey,
    Rank::Deuce,
];

impl IntoIterator for RankRange {
    type Item = Rank;
    type IntoIter = std::vec::IntoIter<Self::Item>;

    fn into_iter(self) -> Self::IntoIter {
        let vec: Vec<Rank> = match self.inclusive {
            true => RANKS[self.start..=self.end].into(),
            false => RANKS[self.start..self.end].into(),
        };

        vec.into_iter()
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_is_iterable_from_ace_until_trey() {
        assert_eq!(
            RankRange::new(Rank::Ace, Rank::Deuce)
                .into_iter()
                .collect::<Vec<_>>(),
            vec![
                Rank::Ace,
                Rank::King,
                Rank::Queen,
                Rank::Jack,
                Rank::Ten,
                Rank::Nine,
                Rank::Eight,
                Rank::Seven,
                Rank::Six,
                Rank::Five,
                Rank::Four,
                Rank::Trey,
            ]
        );
    }

    #[test]
    fn it_is_iterable_from_jack_until_six() {
        assert_eq!(
            RankRange::new(Rank::Jack, Rank::Six)
                .into_iter()
                .collect::<Vec<_>>(),
            vec![Rank::Jack, Rank::Ten, Rank::Nine, Rank::Eight, Rank::Seven,]
        );
    }

    #[test]
    fn it_is_iterable_from_ace_to_two() {
        assert_eq!(
            RankRange::inclusive(Rank::Ace, Rank::Deuce)
                .into_iter()
                .collect::<Vec<_>>(),
            vec![
                Rank::Ace,
                Rank::King,
                Rank::Queen,
                Rank::Jack,
                Rank::Ten,
                Rank::Nine,
                Rank::Eight,
                Rank::Seven,
                Rank::Six,
                Rank::Five,
                Rank::Four,
                Rank::Trey,
                Rank::Deuce,
            ]
        );
    }

    #[test]
    fn it_is_iterable_from_jack_to_six() {
        assert_eq!(
            RankRange::inclusive(Rank::Jack, Rank::Six)
                .into_iter()
                .collect::<Vec<_>>(),
            vec![
                Rank::Jack,
                Rank::Ten,
                Rank::Nine,
                Rank::Eight,
                Rank::Seven,
                Rank::Six,
            ]
        );
    }

    #[test]
    fn it_is_iterable_through_all_ranks() {
        assert_eq!(
            RankRange::all().into_iter().collect::<Vec<_>>(),
            vec![
                Rank::Ace,
                Rank::King,
                Rank::Queen,
                Rank::Jack,
                Rank::Ten,
                Rank::Nine,
                Rank::Eight,
                Rank::Seven,
                Rank::Six,
                Rank::Five,
                Rank::Four,
                Rank::Trey,
                Rank::Deuce,
            ]
        );
    }
}