blob: d7658ccfc991f53c7f114acdf27cd5ccaab5ff71 [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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
// constexpr reverse_iterator operator++(int);
//
// constexpr in C++17
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class It>
void
test(It i, It x)
{
std::reverse_iterator<It> r(i);
std::reverse_iterator<It> rr = r++;
assert(r.base() == x);
assert(rr.base() == i);
}
int main(int, char**)
{
const char* s = "123";
test(bidirectional_iterator<const char*>(s+1), bidirectional_iterator<const char*>(s));
test(random_access_iterator<const char*>(s+1), random_access_iterator<const char*>(s));
test(s+1, s);
#if TEST_STD_VER > 14
{
constexpr const char *p = "123456789";
typedef std::reverse_iterator<const char *> RI;
constexpr RI it1 = std::make_reverse_iterator(p);
constexpr RI it2 = std::make_reverse_iterator(p+1);
static_assert(it1 != it2, "");
constexpr RI it3 = std::make_reverse_iterator(p+1) ++;
static_assert(it1 != it3, "");
static_assert(it2 == it3, "");
}
#endif
return 0;
}