karsher 0.8.7

karsher is a dumb cache written in rust
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

use std::{
    fmt::Display,
    ops::{Add, Div, Mul, Sub},
};

use serde::{Deserialize, Serialize};

#[derive(Debug, PartialEq, Clone, Copy, Serialize, Deserialize)]
pub enum Primitive {
    Int(i128),
    Double(f64),
}

// region: impl primitive

impl Display for Primitive {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Primitive::Int(i) => write!(f, "{i}"),
            Primitive::Double(d) => write!(f, "{d}"),
        }
    }
}

pub trait Pow {
    fn pow(&self, n: Self) -> Self;
}

impl Pow for Primitive {
    fn pow(&self, rhs: Self) -> Self {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) => {
                    Primitive::Double((*l as f64).powf(r as f64))
                }
                Primitive::Double(r) => Primitive::Double((*l as f64).powf(r)),
            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l.powf(r as f64)),
                Primitive::Double(r) => Primitive::Double((*l as f64).powf(r)),
            },
        }
    }
}

impl Add for Primitive {
    type Output = Primitive;

    fn add(self, rhs: Self) -> Self::Output {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) => Primitive::Int(l + r),
                Primitive::Double(r) => Primitive::Double(l as f64 + r),
            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l + r as f64),
                Primitive::Double(r) => Primitive::Double(l as f64 + r),
            },
        }
    }
}

impl Sub for Primitive {
    type Output = Primitive;

    fn sub(self, rhs: Self) -> Self::Output {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) => Primitive::Int(l - r),
                Primitive::Double(r) => Primitive::Double(l as f64 - r),
            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l - r as f64),
                Primitive::Double(r) => Primitive::Double(l as f64 - r),
            },
        }
    }
}

impl std::ops::Rem for Primitive {
    type Output = Primitive;

    fn rem(self, rhs: Self) -> Self::Output {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) if r != 0 => Primitive::Int(l % r),
                Primitive::Double(r) => Primitive::Double(l as f64 % r),
                _ => Primitive::Double(f64::NAN)
            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l % r as f64),
                Primitive::Double(r) => Primitive::Double(l as f64 % r),
            },
        }
    }
}
impl Mul for Primitive {
    type Output = Primitive;

    fn mul(self, rhs: Self) -> Self::Output {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) => Primitive::Int(l * r),
                Primitive::Double(r) => Primitive::Double(l as f64 * r),
            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l * r as f64),
                Primitive::Double(r) => Primitive::Double(l as f64 * r),
            },
        }
    }
}
impl Div for Primitive {
    type Output = Primitive;

    fn div(self, rhs: Self) -> Self::Output {
        match self {
            Primitive::Int(l) => match rhs {
                Primitive::Int(r) if r != 0 => Primitive::Int(l / r),
                Primitive::Double(r) => Primitive::Double(l as f64 / r),
                Primitive::Int(_) if l >= 1 => Primitive::Double(f64::INFINITY),
                _ => Primitive::Double(f64::NAN),
            

            },
            Primitive::Double(l) => match rhs {
                Primitive::Int(r) => Primitive::Double(l / r as f64),
                Primitive::Double(r) => Primitive::Double(l as f64 / r),
            },
        }
    }
}

impl std::ops::Neg for Primitive {
    type Output = Primitive;

    fn neg(self) -> Self::Output {
        match self {
            Primitive::Int(n) => Primitive::Int(-n),
            Primitive::Double(n) => Primitive::Double(-n),
        }
    }
}

// endregion

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

    #[test]
    fn test_add_valid() {
        let l = Primitive::Int(1);
        let r = Primitive::Int(2);
        assert_eq!(l + r, Primitive::Int(3));

        let l = Primitive::Int(1);
        let r = Primitive::Double(2.);
        assert_eq!(l + r, Primitive::Double(3.));

        let l = Primitive::Double(1.);
        let r = Primitive::Int(2);
        assert_eq!(l + r, Primitive::Double(3.));

        let l = Primitive::Double(1.);
        let r = Primitive::Double(2.);
        assert_eq!(l + r, Primitive::Double(3.));
    }
}