1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <valarray>
10
11 // template<class T> class valarray;
12
13 // valarray operator[](const gslice& gs) const;
14
15 #include <valarray>
16 #include <cassert>
17
18 #include "test_macros.h"
19
main(int,char **)20 int main(int, char**)
21 {
22 {
23 int a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
24 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
25 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
26 36, 37, 38, 39, 40};
27 std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));
28 std::size_t sz[] = {2, 4, 3};
29 std::size_t st[] = {19, 4, 1};
30 typedef std::valarray<std::size_t> sizes;
31 typedef std::valarray<std::size_t> strides;
32 std::valarray<int> v(v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
33 strides(st, sizeof(st)/sizeof(st[0])))]);
34 assert(v.size() == 24);
35 assert(v[ 0] == 3);
36 assert(v[ 1] == 4);
37 assert(v[ 2] == 5);
38 assert(v[ 3] == 7);
39 assert(v[ 4] == 8);
40 assert(v[ 5] == 9);
41 assert(v[ 6] == 11);
42 assert(v[ 7] == 12);
43 assert(v[ 8] == 13);
44 assert(v[ 9] == 15);
45 assert(v[10] == 16);
46 assert(v[11] == 17);
47 assert(v[12] == 22);
48 assert(v[13] == 23);
49 assert(v[14] == 24);
50 assert(v[15] == 26);
51 assert(v[16] == 27);
52 assert(v[17] == 28);
53 assert(v[18] == 30);
54 assert(v[19] == 31);
55 assert(v[20] == 32);
56 assert(v[21] == 34);
57 assert(v[22] == 35);
58 assert(v[23] == 36);
59 }
60 {
61 int a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
62 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
63 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
64 36, 37, 38, 39, 40};
65 std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));
66 std::size_t sz[] = {2, 4, 3};
67 std::size_t st[] = {19, 4, 1};
68 typedef std::valarray<std::size_t> sizes;
69 typedef std::valarray<std::size_t> strides;
70 std::valarray<int> v((v1 + 0)[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
71 strides(st, sizeof(st)/sizeof(st[0])))]);
72 assert(v.size() == 24);
73 assert(v[ 0] == 3);
74 assert(v[ 1] == 4);
75 assert(v[ 2] == 5);
76 assert(v[ 3] == 7);
77 assert(v[ 4] == 8);
78 assert(v[ 5] == 9);
79 assert(v[ 6] == 11);
80 assert(v[ 7] == 12);
81 assert(v[ 8] == 13);
82 assert(v[ 9] == 15);
83 assert(v[10] == 16);
84 assert(v[11] == 17);
85 assert(v[12] == 22);
86 assert(v[13] == 23);
87 assert(v[14] == 24);
88 assert(v[15] == 26);
89 assert(v[16] == 27);
90 assert(v[17] == 28);
91 assert(v[18] == 30);
92 assert(v[19] == 31);
93 assert(v[20] == 32);
94 assert(v[21] == 34);
95 assert(v[22] == 35);
96 assert(v[23] == 36);
97 }
98 return 0;
99 }
100