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 mask_array
12 
13 // void mask_array& operator=(const mask_array& ma) const;
14 
15 #include <valarray>
16 #include <cassert>
17 
18 int main(int, char**)
19 {
20     {
21     int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
22     const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
23     bool b1[N1] = {true,  false, false, true,  true,  false,
24                    false, true,  false, false, false, true};
25     int a2[] = {-1, -2, -3, -4, -5, -6, -7, -8};
26     const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);
27     bool b2[N2] = {true,  false, true, true,
28                    false, false, true, true};
29     std::valarray<int> v1(a1, N1);
30     const std::valarray<int> v2(a2, N2);
31     std::valarray<bool> vb1(b1, N1);
32     std::valarray<bool> vb2(b2, N2);
33     v1[vb1] = v2[vb2];
34     assert(v1.size() == 16);
35     assert(v1[ 0] == -1);
36     assert(v1[ 1] ==  1);
37     assert(v1[ 2] ==  2);
38     assert(v1[ 3] == -3);
39     assert(v1[ 4] == -4);
40     assert(v1[ 5] ==  5);
41     assert(v1[ 6] ==  6);
42     assert(v1[ 7] == -7);
43     assert(v1[ 8] ==  8);
44     assert(v1[ 9] ==  9);
45     assert(v1[10] == 10);
46     assert(v1[11] == -8);
47     assert(v1[12] == 12);
48     assert(v1[13] == 13);
49     assert(v1[14] == 14);
50     assert(v1[15] == 15);
51     }
52     // Test return value of assignment
53     {
54     int a1[] = {0, 1, 2};
55     int a2[] = {3, 4, 5};
56     bool b1[] = {true, false, true};
57     std::valarray<int> v1(a1, 3);
58     std::valarray<int> v2(a2, 3);
59     std::valarray<bool> const vb1(b1, 3);
60     std::mask_array<int> m1 = v1[vb1];
61     std::mask_array<int> const m2 = v2[vb1];
62     std::mask_array<int> const & r = (m1 = m2);
63     assert(&r == &m1);
64     }
65 
66   return 0;
67 }
68