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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
// reverse_iterator& operator--(); // constexpr in C++17
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class It>
TEST_CONSTEXPR_CXX17 void test(It i, It x) {
std::reverse_iterator<It> r(i);
std::reverse_iterator<It>& rr = --r;
assert(r.base() == x);
assert(&rr == &r);
}
TEST_CONSTEXPR_CXX17 bool tests() {
const char* s = "123";
test(bidirectional_iterator<const char*>(s+1), bidirectional_iterator<const char*>(s+2));
test(random_access_iterator<const char*>(s+1), random_access_iterator<const char*>(s+2));
test(s+1, s+2);
return true;
}
int main(int, char**) {
tests();
#if TEST_STD_VER > 14
static_assert(tests(), "");
#endif
return 0;
}
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