1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <valarray>
11 
12 // template <class T> class indirect_array
13 
14 // void operator*=(const valarray<value_type>& v) const;
15 
16 #include <valarray>
17 #include <cassert>
18 
main()19 int main()
20 {
21     int a1[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,
22                 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
23                 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
24                 36, 37, 38, 39, 40};
25     const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
26     int a2[] = {  1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11, 12,
27                  13,  14,  15,  16,  17,  18,  19,  20,  21,  22,  23, 24};
28     const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);
29     std::size_t s[N2] = { 3,  4,  5,  7,  8,  9, 11, 12, 13, 15, 16, 17,
30                          22, 23, 24, 26, 27, 28, 30, 31, 32, 34, 35, 36};
31     std::valarray<int> v1(a1, N1);
32     std::valarray<int> v2(a2, N2);
33     std::valarray<std::size_t> ia(s, N2);
34     v1[ia] *= v2;
35     assert(v1.size() == 41);
36     assert(v1[ 0] ==  0);
37     assert(v1[ 1] ==  1);
38     assert(v1[ 2] ==  2);
39     assert(v1[ 3] ==  3);
40     assert(v1[ 4] ==  8);
41     assert(v1[ 5] == 15);
42     assert(v1[ 6] ==  6);
43     assert(v1[ 7] == 28);
44     assert(v1[ 8] == 40);
45     assert(v1[ 9] == 54);
46     assert(v1[10] == 10);
47     assert(v1[11] == 77);
48     assert(v1[12] == 96);
49     assert(v1[13] == 117);
50     assert(v1[14] == 14);
51     assert(v1[15] == 150);
52     assert(v1[16] == 176);
53     assert(v1[17] == 204);
54     assert(v1[18] == 18);
55     assert(v1[19] == 19);
56     assert(v1[20] == 20);
57     assert(v1[21] == 21);
58     assert(v1[22] == 286);
59     assert(v1[23] == 322);
60     assert(v1[24] == 360);
61     assert(v1[25] == 25);
62     assert(v1[26] == 416);
63     assert(v1[27] == 459);
64     assert(v1[28] == 504);
65     assert(v1[29] == 29);
66     assert(v1[30] == 570);
67     assert(v1[31] == 620);
68     assert(v1[32] == 672);
69     assert(v1[33] == 33);
70     assert(v1[34] == 748);
71     assert(v1[35] == 805);
72     assert(v1[36] == 864);
73     assert(v1[37] == 37);
74     assert(v1[38] == 38);
75     assert(v1[39] == 39);
76     assert(v1[40] == 40);
77 }
78