43 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 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