58 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 slice_array12 13// const slice_array& operator=(const slice_array& sa) 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 int a2[] = {-1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12};25 std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));26 const std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));27 v1[std::slice(1, 5, 3)] = v2[std::slice(2, 5, 2)];28 assert(v1.size() == 16);29 assert(v1[ 0] == 0);30 assert(v1[ 1] == -3);31 assert(v1[ 2] == 2);32 assert(v1[ 3] == 3);33 assert(v1[ 4] == -5);34 assert(v1[ 5] == 5);35 assert(v1[ 6] == 6);36 assert(v1[ 7] == -7);37 assert(v1[ 8] == 8);38 assert(v1[ 9] == 9);39 assert(v1[10] == -9);40 assert(v1[11] == 11);41 assert(v1[12] == 12);42 assert(v1[13] == -11);43 assert(v1[14] == 14);44 assert(v1[15] == 15);45 }46 // Test return value of assignment.47 {48 int a1[] = {0, 1, 2};49 std::valarray<int> v1(a1, 3);50 std::slice_array<int> s1 = v1[std::slice(1, 1, 1)];51 std::slice_array<int> s2 = v1[std::slice(0, 1, 1)];52 std::slice_array<int> const & s3 = (s1 = s2);53 assert(&s1 == &s3);54 }55 56 return 0;57}58