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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<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;
}
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