diman_unit_system 0.5.1

Internal procedural macros for diman.
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

use std::collections::HashMap;

use diman_lib::{dimension_exponent::DimensionExponent, magnitude::Magnitude};
use proc_macro2::Ident;

use crate::{
    types::expression::MulDiv,
    types::{base_dimension::BaseDimension, Exponent},
};

#[derive(Clone)]
pub struct BaseDimensions {
    fields: HashMap<BaseDimension, Exponent>,
}

#[derive(Clone)]
pub struct DimensionsAndMagnitude {
    pub dimensions: BaseDimensions,
    pub magnitude: Magnitude,
}

impl PartialEq for BaseDimensions {
    fn eq(&self, other: &Self) -> bool {
        self.fields.iter().all(|(dimension, value)| {
            if let Some(corresponding_value) = other.fields.get(dimension) {
                value == corresponding_value
            } else {
                false
            }
        })
    }
}
impl BaseDimensions {
    pub fn none() -> Self {
        Self {
            fields: HashMap::default(),
        }
    }

    pub fn for_base_dimension(base_dim: BaseDimension) -> Self {
        let mut fields = HashMap::new();
        fields.insert(base_dim, Exponent::one());
        Self { fields }
    }

    pub(crate) fn fields(&self) -> impl Iterator<Item = (&Ident, &Exponent)> {
        self.fields.iter().map(|(dim, exp)| (&dim.0, exp))
    }

    pub(crate) fn keys(&self) -> impl Iterator<Item = &BaseDimension> {
        self.fields.keys()
    }

    pub(crate) fn num_fields(&self) -> usize {
        self.fields.len()
    }

    pub(crate) fn get(&self, dim: &BaseDimension) -> Option<&Exponent> {
        self.fields.get(dim)
    }
}

impl core::ops::Mul for BaseDimensions {
    type Output = Self;

    #[allow(clippy::suspicious_arithmetic_impl)]
    fn mul(self, rhs: Self) -> Self::Output {
        let mut fields = self.fields;
        for (name_rhs, val_rhs) in rhs.fields {
            let same_field = fields.get_mut(&name_rhs);
            if let Some(val) = same_field {
                *val += val_rhs;
            } else {
                fields.insert(name_rhs, val_rhs);
            }
        }
        Self { fields }
    }
}

impl BaseDimensions {
    fn inv(mut self) -> Self {
        for (_, value) in self.fields.iter_mut() {
            *value = -*value;
        }
        self
    }
}

impl core::ops::Div for BaseDimensions {
    type Output = Self;

    #[allow(clippy::suspicious_arithmetic_impl)]
    fn div(self, rhs: Self) -> Self::Output {
        self * rhs.inv()
    }
}

impl MulDiv for BaseDimensions {
    fn pow(self, pow: Exponent) -> Self {
        BaseDimensions {
            fields: self
                .fields
                .into_iter()
                .map(|(ident, value)| (ident, value * pow))
                .collect(),
        }
    }
}

impl DimensionsAndMagnitude {
    pub fn magnitude(magnitude: Magnitude) -> Self {
        Self {
            dimensions: BaseDimensions::none(),
            magnitude,
        }
    }

    pub(crate) fn dimensions(dimensions: BaseDimensions) -> Self {
        Self {
            dimensions,
            magnitude: Magnitude::from_f64(1.0),
        }
    }
}

impl core::ops::Mul for DimensionsAndMagnitude {
    type Output = Self;

    fn mul(self, rhs: Self) -> Self::Output {
        Self {
            dimensions: self.dimensions * rhs.dimensions,
            magnitude: self.magnitude * rhs.magnitude,
        }
    }
}

impl core::ops::Div for DimensionsAndMagnitude {
    type Output = Self;

    fn div(self, rhs: Self) -> Self::Output {
        Self {
            dimensions: self.dimensions / rhs.dimensions,
            magnitude: self.magnitude / rhs.magnitude,
        }
    }
}

impl MulDiv for DimensionsAndMagnitude {
    fn pow(self, pow: Exponent) -> Self {
        Self {
            magnitude: Exponent::float_pow(self.magnitude, pow),
            dimensions: self.dimensions.pow(pow),
        }
    }
}