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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// template<class I2, class S2>
// requires convertible_to<const I2&, I> && convertible_to<const S2&, S> &&
// assignable_from<I&, const I2&> && assignable_from<S&, const S2&>
// common_iterator& operator=(const common_iterator<I2, S2>& x);
#include <iterator>
#include <ranges>
#include <cassert>
#include "test_macros.h"
#include "types.h"
void test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
auto iter1 = cpp17_input_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(cpp17_input_iterator<int*>(buffer + 1));
assert(*commonIter1 == 1);
assert(*commonIter2 == 2);
assert(commonIter1 != commonIter2);
commonIter1 = commonIter2;
assert(*commonIter1 == 2);
assert(*commonIter2 == 2);
assert(commonIter1 == commonIter2);
}
{
auto iter1 = forward_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(forward_iterator<int*>(buffer + 1));
assert(*commonIter1 == 1);
assert(*commonIter2 == 2);
assert(commonIter1 != commonIter2);
commonIter1 = commonIter2;
assert(*commonIter1 == 2);
assert(*commonIter2 == 2);
assert(commonIter1 == commonIter2);
}
{
auto iter1 = random_access_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1 + 1);
auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 7});
assert(*commonIter1 == 1);
assert(*commonIter2 == 2);
assert(commonIter1 != commonIter2);
commonIter1 = commonIter2;
assert(*commonIter1 == 2);
assert(*commonIter2 == 2);
assert(commonIter1 == commonIter2);
assert(std::next(commonIter1, 6) != commonSent1);
assert(std::next(commonIter1, 6) == commonSent2);
commonSent1 = commonSent2;
assert(std::next(commonIter1, 6) == commonSent1);
assert(std::next(commonIter1, 6) == commonSent2);
}
{
auto iter1 = assignable_iterator<int*>(buffer);
auto iter2 = forward_iterator<int*>(buffer + 1);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
auto commonIter2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(iter2);
auto commonSent2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(sentinel_type<int*>{buffer + 7});
assert(*commonIter1 == 1);
assert(*commonIter2 == 2);
commonIter1 = commonIter2;
assert(*commonIter1 == 2);
assert(*commonIter2 == 2);
assert(commonIter1 == commonIter2);
assert(std::next(commonIter1, 6) != commonSent1);
assert(std::next(commonIter1, 6) == commonSent2);
commonSent1 = commonSent2;
assert(std::next(commonIter1, 6) == commonSent1);
assert(std::next(commonIter1, 6) == commonSent2);
commonIter1 = commonSent1;
assert(commonIter1 == commonSent2);
commonIter1 = commonSent2;
assert(commonIter1 == commonSent2);
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
auto iter1 = maybe_valueless_iterator<int*>(buffer);
auto iter2 = forward_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent2 = std::common_iterator<decltype(iter1),
sentinel_throws_on_convert<int*>>(sentinel_throws_on_convert<int*>{buffer + 8});
auto commonIter2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(iter2);
try {
commonIter1 = commonSent2;
assert(false);
} catch (int x) {
assert(x == 42);
commonIter1 = commonIter2;
}
assert(*commonIter1 == 1);
}
#endif // TEST_HAS_NO_EXCEPTIONS
}
int main(int, char**) {
test();
return 0;
}
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