| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // template<sized_sentinel_for<I> I2, sized_sentinel_for<I> S2> |
| // requires sized_sentinel_for<S, I2> |
| // friend iter_difference_t<I2> operator-( |
| // const common_iterator& x, const common_iterator<I2, S2>& y); |
| |
| #include <iterator> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "types.h" |
| |
| void test() { |
| 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), sized_sentinel_type<int*>>(iter1); |
| auto commonSent1 = std::common_iterator<decltype(iter1), sized_sentinel_type<int*>>(sized_sentinel_type<int*>{buffer + 8}); |
| assert(commonIter1 - commonSent1 == -8); |
| assert(commonSent1 - commonIter1 == 8); |
| assert(commonIter1 - commonIter1 == 0); |
| assert(commonSent1 - commonSent1 == 0); |
| } |
| { |
| auto iter1 = simple_iterator<int*>(buffer); |
| auto iter2 = comparable_iterator<int*>(buffer); |
| auto commonIter1 = std::common_iterator<decltype(iter1), sized_sentinel_type<int*>>(iter1); |
| auto commonIter2 = std::common_iterator<decltype(iter2), sized_sentinel_type<int*>>(iter2); |
| |
| assert(commonIter1 - commonIter2 == 0); |
| } |
| { |
| auto iter1 = random_access_iterator<int*>(buffer); |
| const auto commonIter1 = std::common_iterator<decltype(iter1), sized_sentinel_type<int*>>(iter1); |
| const auto commonSent1 = std::common_iterator<decltype(iter1), sized_sentinel_type<int*>>(sized_sentinel_type<int*>{buffer + 8}); |
| assert(commonIter1 - commonSent1 == -8); |
| assert(commonSent1 - commonIter1 == 8); |
| assert(commonIter1 - commonIter1 == 0); |
| assert(commonSent1 - commonSent1 == 0); |
| } |
| { |
| auto iter1 = simple_iterator<int*>(buffer); |
| auto iter2 = comparable_iterator<int*>(buffer); |
| const auto commonIter1 = std::common_iterator<decltype(iter1), sized_sentinel_type<int*>>(iter1); |
| const auto commonIter2 = std::common_iterator<decltype(iter2), sized_sentinel_type<int*>>(iter2); |
| |
| assert(commonIter1 - commonIter2 == 0); |
| } |
| } |
| |
| int main(int, char**) { |
| test(); |
| |
| return 0; |
| } |