57 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// slice_array<value_type> operator[](slice s);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 int a2[] = {-1, -2, -3, -4, -5};25 std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));26 std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));27 v1[std::slice(1, 5, 3)] = v2;28 assert(v1.size() == 16);29 assert(v1[ 0] == 0);30 assert(v1[ 1] == -1);31 assert(v1[ 2] == 2);32 assert(v1[ 3] == 3);33 assert(v1[ 4] == -2);34 assert(v1[ 5] == 5);35 assert(v1[ 6] == 6);36 assert(v1[ 7] == -3);37 assert(v1[ 8] == 8);38 assert(v1[ 9] == 9);39 assert(v1[10] == -4);40 assert(v1[11] == 11);41 assert(v1[12] == 12);42 assert(v1[13] == -5);43 assert(v1[14] == 14);44 assert(v1[15] == 15);45 }46 {47 int a1[] = {0, 1, 2, 3, 4, 5};48 std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));49 std::valarray<int> v2((v1 + 0)[std::slice(0, 3, 2)]);50 assert(v2.size() == 3);51 assert(v2[0] == 0);52 assert(v2[1] == 2);53 assert(v2[2] == 4);54 }55 return 0;56}57