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
20int 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 v1[std::slice(1, 5, 3)] <<= v2;
27 assert(v1.size() == 16);
28 assert(v1[ 0] == 0);
29 assert(v1[ 1] == 2);
30 assert(v1[ 2] == 2);
31 assert(v1[ 3] == 3);
32 assert(v1[ 4] == 16);
33 assert(v1[ 5] == 5);
34 assert(v1[ 6] == 6);
35 assert(v1[ 7] == 56);
36 assert(v1[ 8] == 8);
37 assert(v1[ 9] == 9);
38 assert(v1[10] == 160);
39 assert(v1[11] == 11);
40 assert(v1[12] == 12);
41 assert(v1[13] == 416);
42 assert(v1[14] == 14);
43 assert(v1[15] == 15);
44
45 return 0;
46}
47

source code of libcxx/test/std/numerics/numarray/template.slice.array/slice.arr.comp.assign/shift_left.pass.cpp