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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
//
//===----------------------------------------------------------------------===//
// <iterator>
// reverse_iterator
// template <BidirectionalIterator Iter1, BidirectionalIterator Iter2>
// requires HasEqualTo<Iter1, Iter2>
// bool operator==(const reverse_iterator<Iter1>& x, const reverse_iterator<Iter2>& y); // constexpr since C++17
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class It>
TEST_CONSTEXPR_CXX17 void test(It l, It r, bool x) {
const std::reverse_iterator<It> r1(l);
const std::reverse_iterator<It> r2(r);
assert((r1 == r2) == x);
}
TEST_CONSTEXPR_CXX17 bool tests() {
const char* s = "1234567890";
test(bidirectional_iterator<const char*>(s), bidirectional_iterator<const char*>(s), true);
test(bidirectional_iterator<const char*>(s), bidirectional_iterator<const char*>(s+1), false);
test(random_access_iterator<const char*>(s), random_access_iterator<const char*>(s), true);
test(random_access_iterator<const char*>(s), random_access_iterator<const char*>(s+1), false);
#if TEST_STD_VER >= 20
test(cpp20_random_access_iterator<const char*>(s), cpp20_random_access_iterator<const char*>(s), true);
test(cpp20_random_access_iterator<const char*>(s), cpp20_random_access_iterator<const char*>(s + 1), false);
#endif
test(s, s, true);
test(s, s+1, false);
return true;
}
int main(int, char**) {
tests();
#if TEST_STD_VER > 14
static_assert(tests(), "");
#endif
return 0;
}
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