143 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// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// template<class I2, class S2>12// requires convertible_to<const I2&, I> && convertible_to<const S2&, S> &&13// assignable_from<I&, const I2&> && assignable_from<S&, const S2&>14// common_iterator& operator=(const common_iterator<I2, S2>& x);15 16#include <iterator>17#include <ranges>18#include <cassert>19 20#include "test_macros.h"21#include "types.h"22 23void test() {24 int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};25 26 {27 auto iter1 = cpp17_input_iterator<int*>(buffer);28 auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);29 auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(cpp17_input_iterator<int*>(buffer + 1));30 31 assert(*commonIter1 == 1);32 assert(*commonIter2 == 2);33 assert(commonIter1 != commonIter2);34 35 commonIter1 = commonIter2;36 37 assert(*commonIter1 == 2);38 assert(*commonIter2 == 2);39 assert(commonIter1 == commonIter2);40 }41 {42 auto iter1 = forward_iterator<int*>(buffer);43 auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);44 auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(forward_iterator<int*>(buffer + 1));45 46 assert(*commonIter1 == 1);47 assert(*commonIter2 == 2);48 assert(commonIter1 != commonIter2);49 50 commonIter1 = commonIter2;51 52 assert(*commonIter1 == 2);53 assert(*commonIter2 == 2);54 assert(commonIter1 == commonIter2);55 }56 {57 auto iter1 = random_access_iterator<int*>(buffer);58 auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);59 auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});60 61 auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1 + 1);62 auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 7});63 64 assert(*commonIter1 == 1);65 assert(*commonIter2 == 2);66 assert(commonIter1 != commonIter2);67 68 commonIter1 = commonIter2;69 70 assert(*commonIter1 == 2);71 assert(*commonIter2 == 2);72 assert(commonIter1 == commonIter2);73 74 assert(std::next(commonIter1, 6) != commonSent1);75 assert(std::next(commonIter1, 6) == commonSent2);76 77 commonSent1 = commonSent2;78 79 assert(std::next(commonIter1, 6) == commonSent1);80 assert(std::next(commonIter1, 6) == commonSent2);81 }82 {83 auto iter1 = assignable_iterator<int*>(buffer);84 auto iter2 = forward_iterator<int*>(buffer + 1);85 auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);86 auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});87 88 auto commonIter2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(iter2);89 auto commonSent2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(sentinel_type<int*>{buffer + 7});90 91 assert(*commonIter1 == 1);92 assert(*commonIter2 == 2);93 94 commonIter1 = commonIter2;95 96 assert(*commonIter1 == 2);97 assert(*commonIter2 == 2);98 assert(commonIter1 == commonIter2);99 100 assert(std::next(commonIter1, 6) != commonSent1);101 assert(std::next(commonIter1, 6) == commonSent2);102 103 commonSent1 = commonSent2;104 105 assert(std::next(commonIter1, 6) == commonSent1);106 assert(std::next(commonIter1, 6) == commonSent2);107 108 commonIter1 = commonSent1;109 110 assert(commonIter1 == commonSent2);111 112 commonIter1 = commonSent2;113 114 assert(commonIter1 == commonSent2);115 }116#ifndef TEST_HAS_NO_EXCEPTIONS117 {118 auto iter1 = maybe_valueless_iterator<int*>(buffer);119 auto iter2 = forward_iterator<int*>(buffer);120 auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);121 auto commonSent2 = std::common_iterator<decltype(iter1),122 sentinel_throws_on_convert<int*>>(sentinel_throws_on_convert<int*>{buffer + 8});123 auto commonIter2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(iter2);124 125 try {126 commonIter1 = commonSent2;127 assert(false);128 } catch (int x) {129 assert(x == 42);130 commonIter1 = commonIter2;131 }132 133 assert(*commonIter1 == 1);134 }135#endif // TEST_HAS_NO_EXCEPTIONS136}137 138int main(int, char**) {139 test();140 141 return 0;142}143