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 valarray;
12 
13 // valarray operator[](slice s) const;
14 
15 #include <valarray>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 int main(int, char**)
21 {
22     {
23         int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
24         const std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
25         std::valarray<int> v2 = v1[std::slice(1, 5, 3)];
26         assert(v2.size() == 5);
27         assert(v2[0] ==  1);
28         assert(v2[1] ==  4);
29         assert(v2[2] ==  7);
30         assert(v2[3] == 10);
31         assert(v2[4] == 13);
32     }
33     {
34         int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
35         const std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
36         std::valarray<int> v2 = (v1 + 0)[std::slice(0, 2, 3)];
37         assert(v2.size() == 2);
38         assert(v2[0] ==  0);
39         assert(v2[1] == 3);
40     }
41   return 0;
42 }
43