pipa-lang 1.0.0-alpha.1

A tiny template language
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

// SPDX-FileCopyrightText: Copyright 2026 olav@occy.org
// SPDX-License-Identifier: MPL-2.0

use crate::value::Value;
use crate::value::error::Error;
use crate::value::parse;
use fixed::types::I48F16;

#[derive(Debug, Clone, Default, PartialEq, Eq, PartialOrd, Ord)]
pub(crate) struct Number(I48F16);

impl core::fmt::Display for Number {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        f.write_str(&self.0.to_string())
    }
}

impl From<usize> for Number {
    fn from(value: usize) -> Self {
        Self(I48F16::from_num(value))
    }
}

impl TryFrom<&[u8]> for Number {
    type Error = Error;

    fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
        I48F16::from_str(parse::str(value)?)
            .map_err(|e| Error::Number(e.to_string()))
            .map(Self)
    }
}

impl TryFrom<Number> for usize {
    type Error = ();

    fn try_from(value: Number) -> Result<Self, Self::Error> {
        value.0.checked_to_num().ok_or(())
    }
}

impl TryFrom<Number> for isize {
    type Error = ();

    fn try_from(value: Number) -> Result<Self, Self::Error> {
        value.0.checked_to_num().ok_or(())
    }
}

impl TryFrom<Number> for u32 {
    type Error = ();

    fn try_from(value: Number) -> Result<Self, Self::Error> {
        value.0.checked_to_num().ok_or(())
    }
}

impl From<Number> for Value {
    fn from(number: Number) -> Self {
        Value::from(number.to_string())
    }
}

impl core::ops::Add for Number {
    type Output = Number;

    fn add(self, rhs: Self) -> Self::Output {
        Self(self.0.saturating_add(rhs.0))
    }
}

impl core::ops::Sub for Number {
    type Output = Number;

    fn sub(self, rhs: Self) -> Self::Output {
        Self(self.0.saturating_sub(rhs.0))
    }
}

impl core::ops::Mul for Number {
    type Output = Number;

    fn mul(self, rhs: Self) -> Self::Output {
        Self(self.0.checked_mul(rhs.0).unwrap_or_default())
    }
}

impl core::ops::Div for Number {
    type Output = Number;

    fn div(self, rhs: Self) -> Self::Output {
        Self(self.0.checked_div(rhs.0).unwrap_or_default())
    }
}

impl core::ops::Rem for Number {
    type Output = Number;

    fn rem(self, rhs: Self) -> Self::Output {
        Self(self.0.checked_rem(rhs.0).unwrap_or_default())
    }
}

impl Number {
    pub(crate) fn abs(self) -> Number {
        Self(self.0.checked_abs().unwrap_or_default())
    }

    pub(crate) fn ceil(self) -> Number {
        Self(self.0.checked_ceil().unwrap_or_default())
    }

    pub(crate) fn floor(self) -> Number {
        Self(self.0.checked_floor().unwrap_or_default())
    }

    pub(crate) fn round(self) -> Number {
        Self(self.0.checked_round().unwrap_or_default())
    }
}

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

    #[test]
    fn test_add() {
        assert_eq!((number("1") + number("2")).to_string(), "3");
        assert_eq!((number("1") + number("-2")).to_string(), "-1");
        assert_eq!((number("1") + number("2.01")).to_string(), "3.01");
    }

    #[test]
    fn test_sub() {
        assert_eq!((number("1") - number("1")).to_string(), "0");
        assert_eq!((number("-1") - number("-10")).to_string(), "9");
        assert_eq!((number("1") - number("1.1")).to_string(), "-0.1");
    }

    #[test]
    fn test_div() {
        assert_eq!((number("1") / number("0")).to_string(), "0");
        assert_eq!((number("0") / number("1")).to_string(), "0");
        assert_eq!((number("0") / number("0")).to_string(), "0");
    }

    #[track_caller]
    fn number(s: &str) -> Number {
        Number::try_from(s.as_bytes()).unwrap()
    }
}