uninum 0.1.1

A robust, ergonomic unified number type for Rust with automatic overflow handling, type promotion, and cross-type consistency.
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

//! Ensures primitive interop macro branches remain exercised.

use uninum::{Number, num};

#[test]
fn arithmetic_with_mixed_borrowing_patterns() {
    let number = Number::from(10u64);
    let primitive: u64 = 5;
    let number_ref = &number;
    let primitive_ref = &primitive;
    let twenty = Number::from(20u64);
    let twenty_ref = &twenty;
    let ten = Number::from(10u64);
    let ten_ref = &ten;

    assert_eq!(number.clone() + primitive, Number::from(15u64));
    assert_eq!(number.clone() + primitive_ref, Number::from(15u64));
    assert_eq!(number_ref + primitive, Number::from(15u64));
    assert_eq!(number_ref + primitive_ref, Number::from(15u64));

    assert_eq!(primitive + number.clone(), Number::from(15u64));
    assert_eq!(primitive + number_ref, Number::from(15u64));
    assert_eq!(primitive_ref + number.clone(), Number::from(15u64));
    assert_eq!(primitive_ref + number_ref, Number::from(15u64));

    assert_eq!(twenty.clone() - primitive, Number::from(15u64));
    assert_eq!(twenty.clone() - primitive_ref, Number::from(15u64));
    assert_eq!(twenty_ref - primitive, Number::from(15u64));
    assert_eq!(twenty_ref - primitive_ref, Number::from(15u64));

    assert_eq!(primitive - number.clone(), Number::from(-5i64));
    assert_eq!(primitive - number_ref, Number::from(-5i64));
    assert_eq!(primitive_ref - number.clone(), Number::from(-5i64));
    assert_eq!(primitive_ref - ten_ref, Number::from(-5i64));
}

#[test]
fn multiplication_with_mixed_borrowing_patterns() {
    let number = Number::from(3i64);
    let primitive: i32 = 4;
    let number_ref = &number;
    let primitive_ref = &primitive;

    assert_eq!(number.clone() * primitive, Number::from(12i64));
    assert_eq!(number.clone() * primitive_ref, Number::from(12i64));
    assert_eq!(number_ref * primitive, Number::from(12i64));
    assert_eq!(number_ref * primitive_ref, Number::from(12i64));

    assert_eq!(primitive * number.clone(), Number::from(12i64));
    assert_eq!(primitive * number_ref, Number::from(12i64));
    assert_eq!(primitive_ref * number.clone(), Number::from(12i64));
    assert_eq!(primitive_ref * number_ref, Number::from(12i64));
}

#[test]
fn division_with_mixed_borrowing_patterns() {
    let number = Number::from(20i64);
    let primitive: i64 = 5;
    let float_number = Number::from(10.0f64);
    let float_primitive = 2.5f64;
    let number_ref = &number;
    let primitive_ref = &primitive;
    let float_number_ref = &float_number;
    let float_primitive_ref = &float_primitive;

    assert_eq!(number.clone() / primitive, Number::from(4i64));
    assert_eq!(number.clone() / primitive_ref, Number::from(4i64));
    assert_eq!(number_ref / primitive, Number::from(4i64));
    assert_eq!(number_ref / primitive_ref, Number::from(4i64));

    for quotient in [
        primitive / number.clone(),
        primitive / number_ref,
        primitive_ref / number.clone(),
        primitive_ref / number_ref,
    ] {
        #[cfg(feature = "decimal")]
        if let Some(decimal) = quotient.try_get_decimal() {
            assert_eq!(decimal.to_string(), "0.25");
            continue;
        }

        if let Some(f64_value) = quotient.try_get_f64() {
            assert!((f64_value - 0.25).abs() < 1e-12);
        } else {
            panic!("expected quotient to be representable as Decimal or F64");
        }
    }

    let float_expected = Number::from(4.0);
    assert_eq!(float_number.clone() / float_primitive, float_expected);
    assert_eq!(float_number.clone() / float_primitive_ref, float_expected);
    assert_eq!(float_number_ref / float_primitive, float_expected);
    assert_eq!(float_number_ref / float_primitive_ref, float_expected);

    let reciprocal = float_primitive / float_number.clone();
    #[cfg(feature = "decimal")]
    assert!(reciprocal.try_get_decimal().is_some() || reciprocal.try_get_f64().is_some());
    #[cfg(not(feature = "decimal"))]
    assert!(reciprocal.try_get_f64().is_some());

    let reciprocal_ref = float_primitive_ref / float_number_ref;
    #[cfg(feature = "decimal")]
    assert!(reciprocal_ref.try_get_decimal().is_some() || reciprocal_ref.try_get_f64().is_some());
    #[cfg(not(feature = "decimal"))]
    assert!(reciprocal_ref.try_get_f64().is_some());
}

#[test]
fn remainder_with_mixed_borrowing_patterns() {
    let number = Number::from(17i64);
    let primitive: i64 = 5;
    let number_ref = &number;
    let primitive_ref = &primitive;

    assert_eq!(number.clone() % primitive, Number::from(2i64));
    assert_eq!(number.clone() % primitive_ref, Number::from(2i64));
    assert_eq!(number_ref % primitive, Number::from(2i64));
    assert_eq!(number_ref % primitive_ref, Number::from(2i64));

    assert_eq!(primitive % number.clone(), Number::from(5i64));
    assert_eq!(primitive % number_ref, Number::from(5i64));
    assert_eq!(primitive_ref % number.clone(), Number::from(5i64));
    assert_eq!(primitive_ref % number_ref, Number::from(5i64));
}

#[test]
fn comparison_between_numbers_and_primitives() {
    let number = Number::from(42u64);
    let primitive: u64 = 42;
    let number_ref = &number;

    assert_eq!(number, primitive);
    assert_eq!(primitive, number);
    assert_eq!(number_ref, primitive);
    assert_eq!(primitive, number_ref);

    let other = Number::from(100u64);
    let other_ref = &other;
    assert!(number < 100u64);
    assert!(primitive < other);
    assert!(number_ref < 100u64);
    assert!(primitive < other_ref);
}

#[test]
fn float_operations_cover_reference_paths() {
    let number = num!(2.5);
    let primitive = 2.0f64;
    let number_ref = &number;
    let primitive_ref = &primitive;

    assert_eq!(number.clone() * primitive, Number::from(5.0));
    assert_eq!(number_ref * primitive, Number::from(5.0));
    assert_eq!(primitive * number.clone(), Number::from(5.0));
    assert_eq!(primitive * number_ref, Number::from(5.0));
    assert_eq!(primitive_ref * number.clone(), Number::from(5.0));
    assert_eq!(primitive_ref * number_ref, Number::from(5.0));
}