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

// Copyright 2018-2020 argmin developers
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.

use crate::core::math::ArgminDot;
use crate::core::math::ArgminWeightedDot;

impl<T, U, V> ArgminWeightedDot<T, U, V> for T
where
    Self: ArgminDot<T, U>,
    V: ArgminDot<T, T>,
{
    #[inline]
    fn weighted_dot(&self, w: &V, v: &T) -> U {
        self.dot(&w.dot(v))
    }
}

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

    macro_rules! make_test {
        ($t:ty) => {
            item! {
                #[test]
                fn [<test_ $t>]() {
                    let a = vec![2 as $t, 1 as $t, 2 as $t];
                    let b = vec![1 as $t, 2 as $t, 1 as $t];
                    let w = vec![
                        vec![8 as $t, 1 as $t, 6 as $t],
                        vec![3 as $t, 5 as $t, 7 as $t],
                        vec![4 as $t, 9 as $t, 2 as $t],
                    ];
                    let res: $t = a.weighted_dot(&w, &b);
                    assert!((((res - 100 as $t) as f64).abs()) < std::f64::EPSILON);
                }
            }
        };
    }

    make_test!(i8);
    make_test!(u8);
    make_test!(i16);
    make_test!(u16);
    make_test!(i32);
    make_test!(u32);
    make_test!(i64);
    make_test!(u64);
    make_test!(f32);
    make_test!(f64);
}

#[cfg(feature = "ndarrayl")]
#[cfg(test)]
mod tests_ndarray {
    use super::*;
    use ndarray::array;
    use paste::item;

    macro_rules! make_test {
        ($t:ty) => {
            item! {
                #[test]
                fn [<test_ $t>]() {
                    let a = array![2 as $t, 1 as $t, 2 as $t];
                    let b = array![1 as $t, 2 as $t, 1 as $t];
                    let w = array![
                        [8 as $t, 1 as $t, 6 as $t],
                        [3 as $t, 5 as $t, 7 as $t],
                        [4 as $t, 9 as $t, 2 as $t],
                    ];
                    let res: $t = a.weighted_dot(&w, &b);
                    assert!((((res - 100 as $t) as f64).abs()) < std::f64::EPSILON);
                }
            }
        };
    }

    make_test!(i8);
    make_test!(u8);
    make_test!(i16);
    make_test!(u16);
    make_test!(i32);
    make_test!(u32);
    make_test!(i64);
    make_test!(u64);
    make_test!(f32);
    make_test!(f64);
}