1// Copyright 2023 Brian Smith.
2//
3// Permission to use, copy, modify, and/or distribute this software for any
4// purpose with or without fee is hereby granted, provided that the above
5// copyright notice and this permission notice appear in all copies.
6//
7// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15pub trait ArraySplitMap<I, O, const CN: usize, const ON: usize> {
16 fn array_split_map(self, f: impl Fn([I; CN]) -> O) -> [O; ON];
17}
18
19impl<I, O> ArraySplitMap<I, O, 4, 3> for [I; 12] {
20 #[inline]
21 fn array_split_map(self, f: impl Fn([I; 4]) -> O) -> [O; 3] {
22 let [a0: I, a1: I, a2: I, a3: I, b0: I, b1: I, b2: I, b3: I, c0: I, c1: I, c2: I, c3: I] = self;
23 [
24 f([a0, a1, a2, a3]),
25 f([b0, b1, b2, b3]),
26 f([c0, c1, c2, c3]),
27 ]
28 }
29}
30
31impl<I, O> ArraySplitMap<I, O, 4, 4> for [I; 16] {
32 #[inline]
33 fn array_split_map(self, f: impl Fn([I; 4]) -> O) -> [O; 4] {
34 let [a0: I, a1: I, a2: I, a3: I, b0: I, b1: I, b2: I, b3: I, c0: I, c1: I, c2: I, c3: I, d0: I, d1: I, d2: I, d3: I] = self;
35 [
36 f([a0, a1, a2, a3]),
37 f([b0, b1, b2, b3]),
38 f([c0, c1, c2, c3]),
39 f([d0, d1, d2, d3]),
40 ]
41 }
42}
43
44impl<I, O> ArraySplitMap<I, O, 4, 8> for [I; 32] {
45 #[inline]
46 fn array_split_map(self, f: impl Fn([I; 4]) -> O) -> [O; 8] {
47 let [a0: I, a1: I, a2: I, a3: I, b0: I, b1: I, b2: I, b3: I, c0: I, c1: I, c2: I, c3: I, d0: I, d1: I, d2: I, d3: I, e0: I, e1: I, e2: I, e3: I, f0: I, f1: I, f2: I, f3: I, g0: I, g1: I, g2: I, g3: I, h0: I, h1: I, h2: I, h3: I] =
48 self;
49 [
50 f([a0, a1, a2, a3]),
51 f([b0, b1, b2, b3]),
52 f([c0, c1, c2, c3]),
53 f([d0, d1, d2, d3]),
54 f([e0, e1, e2, e3]),
55 f([f0, f1, f2, f3]),
56 f([g0, g1, g2, g3]),
57 f([h0, h1, h2, h3]),
58 ]
59 }
60}
61
62impl<I, O> ArraySplitMap<I, O, 8, 2> for [I; 16] {
63 #[inline]
64 fn array_split_map(self, f: impl Fn([I; 8]) -> O) -> [O; 2] {
65 let [a0: I, a1: I, a2: I, a3: I, a4: I, a5: I, a6: I, a7: I, b0: I, b1: I, b2: I, b3: I, b4: I, b5: I, b6: I, b7: I] = self;
66 [
67 f([a0, a1, a2, a3, a4, a5, a6, a7]),
68 f([b0, b1, b2, b3, b4, b5, b6, b7]),
69 ]
70 }
71}
72