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 slice_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, 12, 13, 14, 15};
23     int a2[] = {-1, -2, -3, -4, -5};
24     std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
25     std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
26     std::slice_array<int> s1 = v1[std::slice(1, 5, 3)];
27     s1 = v2;
28     assert(v1.size() == 16);
29     assert(v1[ 0] ==  0);
30     assert(v1[ 1] == -1);
31     assert(v1[ 2] ==  2);
32     assert(v1[ 3] ==  3);
33     assert(v1[ 4] == -2);
34     assert(v1[ 5] ==  5);
35     assert(v1[ 6] ==  6);
36     assert(v1[ 7] == -3);
37     assert(v1[ 8] ==  8);
38     assert(v1[ 9] ==  9);
39     assert(v1[10] == -4);
40     assert(v1[11] == 11);
41     assert(v1[12] == 12);
42     assert(v1[13] == -5);
43     assert(v1[14] == 14);
44     assert(v1[15] == 15);
45 
46     ASSERT_SAME_TYPE(decltype(s1 = v2), void);
47 
48 // The initializer list constructor is disabled in C++03 mode.
49 #if TEST_STD_VER > 03
50     std::valarray<double> m = { 0, 0, 0 };
51     std::slice_array<double> s2 = m[std::slice(0, 3, 1)];
52     s2 = { 1, 2, 3 };
53     assert(m[0] == 1);
54     assert(m[1] == 2);
55     assert(m[2] == 3);
56 
57     ASSERT_SAME_TYPE(decltype(s2 = {1, 2, 3}), void);
58 #endif // TEST_STD_VER > 03
59 
60     return 0;
61 }
62