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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
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// common_iterator& operator++();
// decltype(auto) operator++(int);
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "types.h"
struct Incomplete;
void test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
// Reference: http://eel.is/c++draft/iterators.common#common.iter.nav-5
// Case 2: can-reference
{
auto iter1 = simple_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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
// Case 2: can-reference
{
auto iter1 = value_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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
// Case 3: postfix-proxy
{
auto iter1 = void_plus_plus_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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
// Case 2: where this is not referencable or move constructible
{
auto iter1 = value_type_not_move_constructible_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});
commonIter1++;
// Note: postfix operator++ returns void.
// assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*commonIter1 == i);
commonIter1++;
}
assert(commonIter1 == commonSent1);
}
// Case 2: can-reference
{
auto iter1 = cpp17_input_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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
// Case 1: forward_iterator
{
auto iter1 = forward_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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
// Case 1: forward_iterator
{
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});
assert(*(commonIter1++) == 1);
assert(*commonIter1 == 2);
assert(*(++commonIter1) == 3);
assert(*commonIter1 == 3);
for (auto i = 3; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
}
}
int main(int, char**) {
test();
return 0;
}
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