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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 <RandomAccessIterator Iterator>
// reverse_iterator<Iter> operator+(Iter::difference_type n, const reverse_iterator<Iter>& x); // 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, typename std::iterator_traits<It>::difference_type n, It x) {
const std::reverse_iterator<It> r(i);
std::reverse_iterator<It> rr = n + r;
assert(rr.base() == x);
}
TEST_CONSTEXPR_CXX17 bool tests() {
const char* s = "1234567890";
test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s));
test(s+5, 5, s);
return true;
}
int main(int, char**) {
tests();
#if TEST_STD_VER > 14
static_assert(tests(), "");
#endif
return 0;
}
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