numera 0.5.0

numbers
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

// numera::number::integer::z::convert::tests

use crate::all::*;
use core::num::{NonZeroI8, NonZeroU8};

#[test]
fn z_from() -> NumeraResult<()> {
    // NOTE: 3 different ways of casting:
    assert_eq![Z8::new(5), 5.into()];
    assert_eq![Into::<Z8>::into(5), Z8::new(5)];
    assert_eq![<i8 as Into<Z8>>::into(5), Z8::new(5)];

    /* complementary primitive conversions */

    // from smaller u
    assert_eq![Z16::new(0), 0_u8.into()];
    assert_eq![Z16::new(100), 100_u8.into()];

    // from smaller or equal sized i
    assert_eq![Z8::new(0), 0_i8.into()];
    assert_eq![Z8::new(100), 100_i8.into()];
    assert_eq![Z8::new(-100), (-100_i8).into()];
    assert_eq![Z16::new(100), 100_i8.into()];

    // from smaller NonZeroU
    assert_eq![Z16::new(100), NonZeroU8::new(100).unwrap().into()];

    // from smaller or equal sized NonZeroI
    assert_eq![Z8::new(100), NonZeroI8::new(100).unwrap().into()];
    assert_eq![Z8::new(-100), NonZeroI8::new(-100).unwrap().into()];
    assert_eq![Z16::new(100), NonZeroI8::new(100).unwrap().into()];

    /* complementary Integer conversions */

    // from smaller Integer (Self)
    assert_eq![Z16::new(100), Z8::new(100).into()];

    // from smaller or equal sized NonZeroInteger
    assert_eq![Z16::new(100), N0z8::new(100)?.into()];
    assert_eq![Z16::new(-100), N0z8::new(-100)?.into()];
    assert_eq![Z8::new(100), N0z8::new(100)?.into()];

    // from smaller NonNegativeInteger
    assert_eq![Z16::new(100), Nnz8::new(100).into()];

    // from smaller PositiveInteger
    assert_eq![Z16::new(100), Pz8::new(100)?.into()];

    // from smaller NonPositiveInteger
    assert_eq![Z16::new(-100), Npz8::new_neg(100).into()];

    // from smaller NegativeInteger
    assert_eq![Z16::new(-100), Nz8::new_neg(100)?.into()];

    // from smaller Prime
    assert_eq![Z16::new(101), Prime8::new(101)?.into()];

    Ok(())
}

#[test]
#[cfg(feature = "try_from")]
fn z_try_from() -> NumeraResult<()> {
    use core::num::{NonZeroI16, NonZeroU16};

    /* complementary primitive conversions */

    // try_from bigger or equal sized u
    assert_eq![Z8::new(100), 100_u8.try_into()?];
    assert_eq![Z8::new(100), 100_u16.try_into()?];
    assert![TryInto::<Z8>::try_into(200_u16).is_err()];

    // try_from bigger i
    assert_eq![Z8::new(100), 100_i16.try_into()?];
    assert![TryInto::<Z8>::try_into(200i16).is_err()];

    // try_from bigger or equal sized NonZeroU
    assert_eq![Z8::new(100), NonZeroU8::new(100).unwrap().try_into()?];
    assert_eq![Z8::new(100), NonZeroU16::new(100).unwrap().try_into()?];
    assert![TryInto::<Z8>::try_into(NonZeroU16::new(200).unwrap()).is_err()];

    // try_from bigger NonZeroI
    assert_eq![Z8::new(100), NonZeroI16::new(100).unwrap().try_into()?];
    assert![TryInto::<Z8>::try_into(NonZeroI16::new(200).unwrap()).is_err()];

    /* complementary Integer conversions */

    // try_from bigger Integer (Self)
    assert_eq![Z8::new(100), Z16::new(100).try_into()?];
    assert![TryInto::<Z8>::try_into(Z16::new(200)).is_err()];

    // try_from bigger NonZeroInteger
    assert_eq![Z8::new(100), N0z16::new(100)?.try_into()?];
    assert![TryInto::<Z8>::try_into(N0z16::new(200)?).is_err()];

    // from bigger or equal sized NonNegativeInteger
    assert_eq![Z8::new(100), Nnz16::new(100).try_into()?];
    assert_eq![Z8::new(100), Nnz8::new(100).try_into()?];
    assert![TryInto::<Z8>::try_into(Nnz16::new(200)).is_err()];

    // from bigger or equal sized PositiveInteger
    assert_eq![Z8::new(100), Pz16::new(100)?.try_into()?];
    assert_eq![Z8::new(100), Pz8::new(100)?.try_into()?];
    assert![TryInto::<Z8>::try_into(Pz16::new(200)?).is_err()];

    // from bigger or equal sized NonPositiveInteger
    assert_eq![Z8::new(-100), Npz16::new_neg(100).try_into()?];
    assert_eq![Z8::new(-100), Npz8::new_neg(100).try_into()?];
    assert![TryInto::<Z8>::try_into(Npz16::new_neg(200)).is_err()];

    // from bigger or equal sized NegativeInteger
    assert_eq![Z8::new(-100), Nz16::new_neg(100)?.try_into()?];
    assert_eq![Z8::new(-100), Nz8::new_neg(100)?.try_into()?];
    assert![TryInto::<Z8>::try_into(Nz16::new_neg(200)?).is_err()];

    // from bigger or equal sized Prime
    assert_eq![Z8::new(101), P16::new(101)?.try_into()?];
    assert_eq![Z8::new(101), Prime8::new(101)?.try_into()?];
    assert![TryInto::<Z8>::try_into(P16::new(251)?).is_err()];

    Ok(())
}

#[test]
fn z_for() -> NumeraResult<()> {
    // for bigger or equal sized i (Self inner representation)
    assert_eq![0_i8, Z8::new(0).into()];
    assert_eq![100_i8, Z8::new(100).into()];
    assert_eq![-100_i8, Z8::new(-100).into()];
    assert_eq![100_i16, Z8::new(100).into()];

    Ok(())
}

#[test]
#[cfg(feature = "try_from")]
fn z_try_for() -> NumeraResult<()> {
    use core::num::{NonZeroI8, NonZeroU8};

    // try_for smaller i (Self inner representation)
    assert_eq![0_i8, Z16::new(0).try_into()?];
    assert_eq![100_i8, Z16::new(100).try_into()?];
    assert![TryInto::<i8>::try_into(Z16::new(200)).is_err()];

    // try_for u
    assert_eq![0_u8, Z16::new(0).try_into()?];
    assert_eq![200_u8, Z16::new(200).try_into()?];
    assert![TryInto::<u8>::try_into(Z16::new(300)).is_err()];

    // try_for NonZeroI
    assert_eq![NonZeroI8::new(100).unwrap(), Z16::new(100).try_into()?];
    assert![TryInto::<NonZeroI8>::try_into(Z8::new(0)).is_err()];
    assert![TryInto::<NonZeroI8>::try_into(Z16::new(200)).is_err()];

    // try_for NonZeroU
    assert_eq![NonZeroU8::new(200).unwrap(), Z16::new(200).try_into()?];
    assert![TryInto::<NonZeroU8>::try_into(Z8::new(0)).is_err()];
    assert![TryInto::<NonZeroU8>::try_into(Z16::new(300)).is_err()];

    Ok(())
}