100 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[](const gslice& gs) const;14 15#include <valarray>16#include <cassert>17 18#include "test_macros.h"19 20int main(int, char**)21{22 {23 int a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,24 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,25 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,26 36, 37, 38, 39, 40};27 std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));28 std::size_t sz[] = {2, 4, 3};29 std::size_t st[] = {19, 4, 1};30 typedef std::valarray<std::size_t> sizes;31 typedef std::valarray<std::size_t> strides;32 std::valarray<int> v(v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),33 strides(st, sizeof(st)/sizeof(st[0])))]);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 {61 int a[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,62 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,63 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,64 36, 37, 38, 39, 40};65 std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));66 std::size_t sz[] = {2, 4, 3};67 std::size_t st[] = {19, 4, 1};68 typedef std::valarray<std::size_t> sizes;69 typedef std::valarray<std::size_t> strides;70 std::valarray<int> v((v1 + 0)[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),71 strides(st, sizeof(st)/sizeof(st[0])))]);72 assert(v.size() == 24);73 assert(v[ 0] == 3);74 assert(v[ 1] == 4);75 assert(v[ 2] == 5);76 assert(v[ 3] == 7);77 assert(v[ 4] == 8);78 assert(v[ 5] == 9);79 assert(v[ 6] == 11);80 assert(v[ 7] == 12);81 assert(v[ 8] == 13);82 assert(v[ 9] == 15);83 assert(v[10] == 16);84 assert(v[11] == 17);85 assert(v[12] == 22);86 assert(v[13] == 23);87 assert(v[14] == 24);88 assert(v[15] == 26);89 assert(v[16] == 27);90 assert(v[17] == 28);91 assert(v[18] == 30);92 assert(v[19] == 31);93 assert(v[20] == 32);94 assert(v[21] == 34);95 assert(v[22] == 35);96 assert(v[23] == 36);97 }98 return 0;99}100