nuvec-core 0.4.1

Lazy arrays, operations, transforms and evaluation for nuvec
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

//! Creating arrays: `array!`, `From`, `FromIterator`, `from_slice`, `full`,
//! `arange`, `*_like`, with MLX's default dtypes.

use nuvec_core::*;

#[test]
fn array_macro_shapes_and_dtypes() {
    let m = array![[1.0, 2.0], [3.0, 4.0]];
    assert_eq!((m.shape(), m.dtype()), (&[2, 2][..], DType::F32));
    assert_eq!(m.to_vec::<f32>().unwrap(), [1.0, 2.0, 3.0, 4.0]);
    assert_eq!(array![1, 2, 3].dtype(), DType::I32);
    assert_eq!(array![1u8, 2, 3].dtype(), DType::U8);
    assert_eq!(array![-1i64, 2].dtype(), DType::I64);
    assert_eq!(array![true, false].dtype(), DType::Bool);
    assert_eq!(array![f16::from_f32(1.0)].dtype(), DType::F16);
    assert_eq!(array![2.5].shape(), [1]);
    // f64 literals follow the float32 default, also through variables.
    assert_eq!(array![1.0f64].dtype(), DType::F32);
    let v: f64 = 0.25;
    assert_eq!(array![v, v].dtype(), DType::F32);
    let t = array![[[1, 2], [3, 4]], [[5, 6], [7, 8]]];
    assert_eq!(t.shape(), [2, 2, 2]);
    let q = array![[[[1.5]]], [[[2.5]]]];
    assert_eq!(q.shape(), [2, 1, 1, 1]);
    assert_eq!(array![[1, 2],].shape(), [1, 2], "trailing commas");
}

#[test]
fn from_conversions_keep_the_element_type() {
    let a = Array::from([1.0f32, 2.0]);
    assert_eq!((a.shape(), a.dtype()), (&[2][..], DType::F32));
    assert_eq!(Array::from(vec![1i64; 6]).shape(), [6]);
    assert_eq!(Array::from(vec![1i64; 6]).dtype(), DType::I64);
    assert_eq!(Array::from(&[1u16, 2][..]).dtype(), DType::U16);
    let s = Array::from(3i32);
    assert_eq!((s.ndim(), s.dtype()), (0, DType::I32));
    assert_eq!(
        Array::from(3.0f64).dtype(),
        DType::F64,
        "strong: f64 stays float64"
    );
    assert_eq!(Array::from(vec![0.5f64]).dtype(), DType::F64);
    let c: Array = (0..10).map(|i| i as f32).collect();
    assert_eq!((c.shape(), c.dtype()), (&[10][..], DType::F32));
    // A strong scalar keeps its dtype in an operation; a Rust number adapts.
    let h = Array::from([1.0f32]).astype(DType::F16);
    assert_eq!((&h + Array::from(1.0f32)).dtype(), DType::F32);
    assert_eq!((&h + 1.0f32).dtype(), DType::F16);
}

#[test]
fn from_slice_checks_the_length() {
    let a = Array::from_slice(&[1u8, 2, 3, 4, 5, 6], [2, 3]);
    assert_eq!(a.shape(), [2, 3]);
    let line = line!() + 1;
    let bad = Array::from_slice(&[1.0f32, 2.0], [3, 2]);
    assert_eq!(bad.shape(), [3, 2], "the requested shape is kept");
    let e = bad.check().unwrap_err();
    assert_eq!(
        e.kind(),
        Some(&OpErrorKind::SizeMismatch {
            expected: 6,
            actual: 2
        })
    );
    assert_eq!(e.location().unwrap().line(), line);
}

#[test]
fn constructors_and_likes() {
    assert_eq!(
        ops::zeros([2, 3], DType::F32).to_vec::<f32>().unwrap(),
        [0.0; 6]
    );
    assert_eq!(ops::ones((), DType::I8).item::<i8>().unwrap(), 1);
    let f = ops::full([2, 2], 0.5);
    assert_eq!(
        (f.dtype(), f.to_vec::<f32>().unwrap()),
        (DType::F32, vec![0.5; 4])
    );
    assert_eq!(
        ops::full([3], 7).dtype(),
        DType::I32,
        "a Rust integer is weak"
    );
    let strong = ops::full([3], Array::from(7u8));
    assert_eq!(
        (strong.dtype(), strong.to_vec::<u8>().unwrap()),
        (DType::U8, vec![7; 3])
    );
    let x = Array::from([1u16, 2, 3]).reshape([3, 1]);
    for (like, value) in [(x.zeros_like(), 0), (x.ones_like(), 1), (x.full_like(9), 9)] {
        assert_eq!((like.shape(), like.dtype()), (&[3, 1][..], DType::U16));
        assert_eq!(like.to_vec::<u16>().unwrap(), [value; 3]);
    }
    assert_eq!(ops::zeros_like(&x).shape(), [3, 1]);
    assert_eq!(
        ops::full_like(&x, 2.0).dtype(),
        DType::U16,
        "weak: takes x's dtype"
    );
}

#[test]
fn arange_infers_mlx_dtypes() {
    let i = ops::arange(0, 10, 1);
    assert_eq!((i.dtype(), i.shape()), (DType::I32, &[10][..]));
    let f = ops::arange(0.0, 1.0, 0.25);
    assert_eq!(
        (f.dtype(), f.to_vec::<f32>().unwrap()),
        (DType::F32, vec![0.0, 0.25, 0.5, 0.75])
    );
    assert_eq!(
        ops::arange(0, 3, 0.5).dtype(),
        DType::F32,
        "any float gives float32"
    );
    assert_eq!(
        ops::arange(1i64 << 40, (1i64 << 40) + 2, 1).dtype(),
        DType::I64
    );
    assert_eq!(ops::arange(5, 0, -2).to_vec::<i32>().unwrap(), [5, 3, 1]);
    assert!(ops::arange(0, 1, 0).is_failed());
}

#[test]
fn printing() {
    assert_eq!(array![1, 2].to_string(), "array([1, 2], dtype=int32)");
    let lazy = array![1.0] + 1.0;
    let debug = format!("{lazy:?}");
    assert!(
        debug.contains("unevaluated") && !lazy.is_evaluated(),
        "{debug}"
    );
    lazy.eval().unwrap();
    assert!(format!("{lazy:?}").contains("[2]"), "values once evaluated");
    let mut slot = array![1, 2, 3];
    slot = std::mem::take(&mut slot).at(0).set(9);
    assert_eq!(slot.to_vec::<i32>().unwrap(), [9, 2, 3]);
}