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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <valarray>
// template <class T> class slice_array
// void operator+= (const valarray<value_type>& v) const;
#include <valarray>
#include <cassert>
int main()
{
int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
int a2[] = {-1, -2, -3, -4, -5};
std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
v1[std::slice(1, 5, 3)] += v2;
assert(v1.size() == 16);
assert(v1[ 0] == 0);
assert(v1[ 1] == 0);
assert(v1[ 2] == 2);
assert(v1[ 3] == 3);
assert(v1[ 4] == 2);
assert(v1[ 5] == 5);
assert(v1[ 6] == 6);
assert(v1[ 7] == 4);
assert(v1[ 8] == 8);
assert(v1[ 9] == 9);
assert(v1[10] == 6);
assert(v1[11] == 11);
assert(v1[12] == 12);
assert(v1[13] == 8);
assert(v1[14] == 14);
assert(v1[15] == 15);
}
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