| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // <algorithm> |
| 10 | |
| 11 | // template<ForwardIterator Iter1, ForwardIterator Iter2> |
| 12 | // requires HasEqualTo<Iter1::value_type, Iter2::value_type> |
| 13 | // constexpr Iter1 // constexpr after C++17 |
| 14 | // search(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2); |
| 15 | // |
| 16 | // template<class ForwardIterator, class Searcher> |
| 17 | // ForwardIterator search(ForwardIterator first, ForwardIterator last, |
| 18 | // const Searcher& searcher); // C++17 |
| 19 | |
| 20 | #include <algorithm> |
| 21 | #include <cassert> |
| 22 | |
| 23 | #include "test_macros.h" |
| 24 | #include "test_iterators.h" |
| 25 | |
| 26 | struct MySearcherC { |
| 27 | template <typename Iterator> |
| 28 | std::pair<Iterator, Iterator> TEST_CONSTEXPR operator()(Iterator b, Iterator e) const { |
| 29 | return std::make_pair(b, e); |
| 30 | } |
| 31 | }; |
| 32 | |
| 33 | #if TEST_STD_VER > 17 |
| 34 | TEST_CONSTEXPR bool test_constexpr() { |
| 35 | int ia[] = {0, 1, 2, 3}; |
| 36 | int ib[] = {0, 1, 5, 3}; |
| 37 | int ic[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4}; |
| 38 | return (std::search(std::begin(ic), std::end(ic), std::begin(ia), std::end(ia)) == ic + 3) && |
| 39 | (std::search(std::begin(ic), std::end(ic), std::begin(ib), std::end(ib)) == std::end(ic)) && |
| 40 | (std::search(std::begin(ic), std::end(ic), MySearcherC()) == std::begin(ic)); |
| 41 | } |
| 42 | #endif |
| 43 | |
| 44 | int searcher_called = 0; |
| 45 | |
| 46 | struct MySearcher { |
| 47 | template <typename Iterator> |
| 48 | std::pair<Iterator, Iterator> operator()(Iterator b, Iterator e) const { |
| 49 | ++searcher_called; |
| 50 | return std::make_pair(b, e); |
| 51 | } |
| 52 | }; |
| 53 | |
| 54 | namespace User { |
| 55 | struct S { |
| 56 | S(int x) : x_(x) {} |
| 57 | int x_; |
| 58 | }; |
| 59 | bool operator==(S lhs, S rhs) { return lhs.x_ == rhs.x_; } |
| 60 | template <class T, class U> |
| 61 | void make_pair(T&&, U&&) = delete; |
| 62 | } // namespace User |
| 63 | |
| 64 | template <class Iter1, class Iter2> |
| 65 | void test() { |
| 66 | int ia[] = {0, 1, 2, 3, 4, 5}; |
| 67 | const unsigned sa = sizeof(ia) / sizeof(ia[0]); |
| 68 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia), Iter2(ia)) == Iter1(ia)); |
| 69 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia), Iter2(ia + 1)) == Iter1(ia)); |
| 70 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + 1), Iter2(ia + 2)) == Iter1(ia + 1)); |
| 71 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + 2), Iter2(ia + 2)) == Iter1(ia)); |
| 72 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + 2), Iter2(ia + 3)) == Iter1(ia + 2)); |
| 73 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + 2), Iter2(ia + 3)) == Iter1(ia + 2)); |
| 74 | assert(std::search(Iter1(ia), Iter1(ia), Iter2(ia + 2), Iter2(ia + 3)) == Iter1(ia)); |
| 75 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + sa - 1), Iter2(ia + sa)) == Iter1(ia + sa - 1)); |
| 76 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia + sa - 3), Iter2(ia + sa)) == Iter1(ia + sa - 3)); |
| 77 | assert(std::search(Iter1(ia), Iter1(ia + sa), Iter2(ia), Iter2(ia + sa)) == Iter1(ia)); |
| 78 | assert(std::search(Iter1(ia), Iter1(ia + sa - 1), Iter2(ia), Iter2(ia + sa)) == Iter1(ia + sa - 1)); |
| 79 | assert(std::search(Iter1(ia), Iter1(ia + 1), Iter2(ia), Iter2(ia + sa)) == Iter1(ia + 1)); |
| 80 | int ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4}; |
| 81 | const unsigned sb = sizeof(ib) / sizeof(ib[0]); |
| 82 | int ic[] = {1}; |
| 83 | assert(std::search(Iter1(ib), Iter1(ib + sb), Iter2(ic), Iter2(ic + 1)) == Iter1(ib + 1)); |
| 84 | int id[] = {1, 2}; |
| 85 | assert(std::search(Iter1(ib), Iter1(ib + sb), Iter2(id), Iter2(id + 2)) == Iter1(ib + 1)); |
| 86 | int ie[] = {1, 2, 3}; |
| 87 | assert(std::search(Iter1(ib), Iter1(ib + sb), Iter2(ie), Iter2(ie + 3)) == Iter1(ib + 4)); |
| 88 | int ig[] = {1, 2, 3, 4}; |
| 89 | assert(std::search(Iter1(ib), Iter1(ib + sb), Iter2(ig), Iter2(ig + 4)) == Iter1(ib + 8)); |
| 90 | int ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4}; |
| 91 | const unsigned sh = sizeof(ih) / sizeof(ih[0]); |
| 92 | int ii[] = {1, 1, 2}; |
| 93 | assert(std::search(Iter1(ih), Iter1(ih + sh), Iter2(ii), Iter2(ii + 3)) == Iter1(ih + 3)); |
| 94 | int ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0}; |
| 95 | const unsigned sj = sizeof(ij) / sizeof(ij[0]); |
| 96 | int ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0}; |
| 97 | const unsigned sk = sizeof(ik) / sizeof(ik[0]); |
| 98 | assert(std::search(Iter1(ij), Iter1(ij + sj), Iter2(ik), Iter2(ik + sk)) == Iter1(ij + 6)); |
| 99 | } |
| 100 | |
| 101 | template <class Iter> |
| 102 | void adl_test() { |
| 103 | User::S ua[] = {1}; |
| 104 | assert(std::search(Iter(ua), Iter(ua), Iter(ua), Iter(ua)) == Iter(ua)); |
| 105 | } |
| 106 | |
| 107 | int main(int, char**) { |
| 108 | test<forward_iterator<const int*>, forward_iterator<const int*> >(); |
| 109 | test<forward_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| 110 | test<forward_iterator<const int*>, random_access_iterator<const int*> >(); |
| 111 | test<bidirectional_iterator<const int*>, forward_iterator<const int*> >(); |
| 112 | test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| 113 | test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >(); |
| 114 | test<random_access_iterator<const int*>, forward_iterator<const int*> >(); |
| 115 | test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >(); |
| 116 | test<random_access_iterator<const int*>, random_access_iterator<const int*> >(); |
| 117 | |
| 118 | adl_test<forward_iterator<User::S*> >(); |
| 119 | adl_test<random_access_iterator<User::S*> >(); |
| 120 | |
| 121 | #if TEST_STD_VER > 14 |
| 122 | { |
| 123 | typedef int* RI; |
| 124 | static_assert((std::is_same<RI, decltype(std::search(RI(), RI(), MySearcher()))>::value), "" ); |
| 125 | |
| 126 | RI it(nullptr); |
| 127 | assert(it == std::search(it, it, MySearcher())); |
| 128 | assert(searcher_called == 1); |
| 129 | } |
| 130 | #endif |
| 131 | |
| 132 | #if TEST_STD_VER > 17 |
| 133 | static_assert(test_constexpr()); |
| 134 | #endif |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |