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 mask_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, 12, 13, 14, 15};
22 const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
23 int a2[] = {1, 2, 3, 4, 5};
24 const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);
25 bool b[N1] = {true, false, false, true, true, false,
26 false, true, false, false, false, true};
27 std::valarray<int> v1(a1, N1);
28 std::valarray<int> v2(a2, N2);
29 assert(N2 == std::count(b, b+N1, true));
30 std::valarray<bool> vb(b, N1);
31 v1[vb] &= v2;
32 assert(v1.size() == 16);
33 assert(v1[ 0] == 0);
34 assert(v1[ 1] == 1);
35 assert(v1[ 2] == 2);
36 assert(v1[ 3] == 2);
37 assert(v1[ 4] == 0);
38 assert(v1[ 5] == 5);
39 assert(v1[ 6] == 6);
40 assert(v1[ 7] == 4);
41 assert(v1[ 8] == 8);
42 assert(v1[ 9] == 9);
43 assert(v1[10] == 10);
44 assert(v1[11] == 1);
45 assert(v1[12] == 12);
46 assert(v1[13] == 13);
47 assert(v1[14] == 14);
48 assert(v1[15] == 15);
49 }
50