53 lines · cpp
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 mask_array12 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 const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);24 int a2[] = {1, 2, 3, 4, 5};25 const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);26 bool b[N1] = {true, false, false, true, true, false,27 false, true, false, false, false, true};28 std::valarray<int> v1(a1, N1);29 std::valarray<int> v2(a2, N2);30 assert(N2 == std::count(b, b+N1, true));31 std::valarray<bool> vb(b, N1);32 v1[vb] &= v2;33 assert(v1.size() == 16);34 assert(v1[ 0] == 0);35 assert(v1[ 1] == 1);36 assert(v1[ 2] == 2);37 assert(v1[ 3] == 2);38 assert(v1[ 4] == 0);39 assert(v1[ 5] == 5);40 assert(v1[ 6] == 6);41 assert(v1[ 7] == 4);42 assert(v1[ 8] == 8);43 assert(v1[ 9] == 9);44 assert(v1[10] == 10);45 assert(v1[11] == 1);46 assert(v1[12] == 12);47 assert(v1[13] == 13);48 assert(v1[14] == 14);49 assert(v1[15] == 15);50 51 return 0;52}53