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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-exception6//7//===----------------------------------------------------------------------===//8 9// <valarray>10 11// template<class T> class valarray;12 13// valarray& operator=(const indirect_array<value_type>& ia);14 15#include <valarray>16#include <cassert>17 18#include "test_macros.h"19 20int main(int, char**)21{22    int a[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,23               12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,24               24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,25               36, 37, 38, 39, 40};26    const std::size_t N1 = sizeof(a)/sizeof(a[0]);27    std::size_t s[] = { 3,  4,  5,  7,  8,  9, 11, 12, 13, 15, 16, 17,28                       22, 23, 24, 26, 27, 28, 30, 31, 32, 34, 35, 36};29    const std::size_t S = sizeof(s)/sizeof(s[0]);30    std::valarray<int> v1(a, N1);31    std::valarray<std::size_t> ia(s, S);32    std::valarray<int> v(24);33    v = v1[ia];34    assert(v.size() == 24);35    assert(v[ 0] ==  3);36    assert(v[ 1] ==  4);37    assert(v[ 2] ==  5);38    assert(v[ 3] ==  7);39    assert(v[ 4] ==  8);40    assert(v[ 5] ==  9);41    assert(v[ 6] == 11);42    assert(v[ 7] == 12);43    assert(v[ 8] == 13);44    assert(v[ 9] == 15);45    assert(v[10] == 16);46    assert(v[11] == 17);47    assert(v[12] == 22);48    assert(v[13] == 23);49    assert(v[14] == 24);50    assert(v[15] == 26);51    assert(v[16] == 27);52    assert(v[17] == 28);53    assert(v[18] == 30);54    assert(v[19] == 31);55    assert(v[20] == 32);56    assert(v[21] == 34);57    assert(v[22] == 35);58    assert(v[23] == 36);59 60  return 0;61}62