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
20int 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

source code of libcxx/test/std/numerics/numarray/template.valarray/valarray.sub/slice_const.pass.cpp