| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // common_iterator& operator++(); |
| // decltype(auto) operator++(int); |
| |
| #include <iterator> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "types.h" |
| |
| struct Incomplete; |
| |
| void test() { |
| // Reference: http://eel.is/c++draft/iterators.common#common.iter.nav-5 |
| // Case 2: can-reference |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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 |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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 |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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 |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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++; |
| ASSERT_SAME_TYPE(decltype(commonIter1++), void); |
| 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 |
| { |
| 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 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 |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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 |
| { |
| int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8}; |
| 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); |
| } |
| |
| // Increment a common_iterator<cpp17_output_iterator>: iter_value_t is not always valid for |
| // output iterators (it isn't for our test cpp17_output_iterator). This is worth testing |
| // because it gets tricky when we define operator++(int). |
| { |
| int buffer[] = {0, 1, 2, 3, 4}; |
| using Common = std::common_iterator<cpp17_output_iterator<int*>, sentinel_type<int*>>; |
| auto iter = Common(cpp17_output_iterator<int*>(buffer)); |
| auto sent = Common(sentinel_type<int*>{buffer + 5}); |
| |
| *iter++ = 90; |
| assert(buffer[0] == 90); |
| |
| *iter = 91; |
| assert(buffer[1] == 91); |
| |
| *++iter = 92; |
| assert(buffer[2] == 92); |
| |
| iter++; |
| iter++; |
| assert(iter != sent); |
| iter++; |
| assert(iter == sent); |
| } |
| } |
| |
| int main(int, char**) { |
| test(); |
| |
| return 0; |
| } |