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 slice_array
13 
14 // const slice_array& operator=(const slice_array& sa) const;
15 
16 #include <valarray>
17 #include <cassert>
18 
main()19 int main()
20 {
21     {
22     int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
23     int a2[] = {-1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12};
24     std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
25     const std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
26     v1[std::slice(1, 5, 3)] = v2[std::slice(2, 5, 2)];
27     assert(v1.size() == 16);
28     assert(v1[ 0] ==  0);
29     assert(v1[ 1] == -3);
30     assert(v1[ 2] ==  2);
31     assert(v1[ 3] ==  3);
32     assert(v1[ 4] == -5);
33     assert(v1[ 5] ==  5);
34     assert(v1[ 6] ==  6);
35     assert(v1[ 7] == -7);
36     assert(v1[ 8] ==  8);
37     assert(v1[ 9] ==  9);
38     assert(v1[10] == -9);
39     assert(v1[11] == 11);
40     assert(v1[12] == 12);
41     assert(v1[13] == -11);
42     assert(v1[14] == 14);
43     assert(v1[15] == 15);
44     }
45     // Test return value of assignment.
46     {
47     int a1[] = {0, 1, 2};
48     int a2[] = {3, 4, 3};
49     std::valarray<int> v1(a1, 3);
50     std::slice_array<int> s1 = v1[std::slice(1, 1, 1)];
51     std::slice_array<int> s2 = v1[std::slice(0, 1, 1)];
52     std::slice_array<int> const & s3 = (s1 = s2);
53     assert(&s1 == &s3);
54     }
55 }
56