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 gslice_array
12 
13 // void operator+= (const valarray<value_type>& v) const;
14 
15 #include <valarray>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 int main(int, char**)
21 {
22     int a1[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,
23                 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
24                 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
25                 36, 37, 38, 39, 40};
26     int a2[] = { -0,  -1,  -2,  -3,  -4,  -5,  -6,  -7,  -8,  -9, -10, -11,
27                 -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23};
28     std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
29     std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
30     std::size_t sz[] = {2, 4, 3};
31     std::size_t st[] = {19, 4, 1};
32     typedef std::valarray<std::size_t> sizes;
33     typedef std::valarray<std::size_t> strides;
34     v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
35                       strides(st, sizeof(st)/sizeof(st[0])))] += v2;
36     assert(v1.size() == 41);
37     assert(v1[ 0] ==  0);
38     assert(v1[ 1] ==  1);
39     assert(v1[ 2] ==  2);
40     assert(v1[ 3] ==  3);
41     assert(v1[ 4] ==  3);
42     assert(v1[ 5] ==  3);
43     assert(v1[ 6] ==  6);
44     assert(v1[ 7] ==  4);
45     assert(v1[ 8] ==  4);
46     assert(v1[ 9] ==  4);
47     assert(v1[10] == 10);
48     assert(v1[11] ==  5);
49     assert(v1[12] ==  5);
50     assert(v1[13] ==  5);
51     assert(v1[14] == 14);
52     assert(v1[15] ==  6);
53     assert(v1[16] ==  6);
54     assert(v1[17] ==  6);
55     assert(v1[18] == 18);
56     assert(v1[19] == 19);
57     assert(v1[20] == 20);
58     assert(v1[21] == 21);
59     assert(v1[22] == 10);
60     assert(v1[23] == 10);
61     assert(v1[24] == 10);
62     assert(v1[25] == 25);
63     assert(v1[26] == 11);
64     assert(v1[27] == 11);
65     assert(v1[28] == 11);
66     assert(v1[29] == 29);
67     assert(v1[30] == 12);
68     assert(v1[31] == 12);
69     assert(v1[32] == 12);
70     assert(v1[33] == 33);
71     assert(v1[34] == 13);
72     assert(v1[35] == 13);
73     assert(v1[36] == 13);
74     assert(v1[37] == 37);
75     assert(v1[38] == 38);
76     assert(v1[39] == 39);
77     assert(v1[40] == 40);
78 
79   return 0;
80 }
81