96 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// <algorithm>10 11// template<ForwardIterator Iter, class T>12// requires OutputIterator<Iter, RvalueOf<Iter::reference>::type>13// && HasEqualTo<Iter::value_type, T>14// constexpr Iter // constexpr after C++1715// remove(Iter first, Iter last, const T& value);16 17#include <algorithm>18#include <cassert>19#include <memory>20 21#include "test_macros.h"22#include "test_iterators.h"23 24#if TEST_STD_VER > 1725TEST_CONSTEXPR bool test_constexpr() {26 int ia[] = {1, 3, 5, 2, 5, 6};27 28 auto it = std::remove(std::begin(ia), std::end(ia), 5);29 30 return (std::begin(ia) + std::size(ia) - 2) == it // we removed two elements31 && std::none_of(std::begin(ia), it, [](int a) {return a == 5; })32 ;33 }34#endif35 36template <class Iter>37void38test()39{40 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2};41 const unsigned sa = sizeof(ia)/sizeof(ia[0]);42 Iter r = std::remove(Iter(ia), Iter(ia+sa), 2);43 assert(base(r) == ia + sa-3);44 assert(ia[0] == 0);45 assert(ia[1] == 1);46 assert(ia[2] == 3);47 assert(ia[3] == 4);48 assert(ia[4] == 3);49 assert(ia[5] == 4);50}51 52#if TEST_STD_VER >= 1153template <class Iter>54void55test1()56{57 const unsigned sa = 9;58 std::unique_ptr<int> ia[sa];59 ia[0].reset(new int(0));60 ia[1].reset(new int(1));61 ia[3].reset(new int(3));62 ia[4].reset(new int(4));63 ia[6].reset(new int(3));64 ia[7].reset(new int(4));65 Iter r = std::remove(Iter(ia), Iter(ia+sa), std::unique_ptr<int>());66 assert(base(r) == ia + sa-3);67 assert(*ia[0] == 0);68 assert(*ia[1] == 1);69 assert(*ia[2] == 3);70 assert(*ia[3] == 4);71 assert(*ia[4] == 3);72 assert(*ia[5] == 4);73}74#endif // TEST_STD_VER >= 1175 76int main(int, char**)77{78 test<forward_iterator<int*> >();79 test<bidirectional_iterator<int*> >();80 test<random_access_iterator<int*> >();81 test<int*>();82 83#if TEST_STD_VER >= 1184 test1<forward_iterator<std::unique_ptr<int>*> >();85 test1<bidirectional_iterator<std::unique_ptr<int>*> >();86 test1<random_access_iterator<std::unique_ptr<int>*> >();87 test1<std::unique_ptr<int>*>();88#endif // TEST_STD_VER >= 1189 90#if TEST_STD_VER > 1791 static_assert(test_constexpr());92#endif93 94 return 0;95}96