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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <iterator>
// reverse_iterator
// template <RandomAccessIterator Iter1, RandomAccessIterator Iter2>
// requires HasGreater<Iter1, Iter2>
// constexpr bool
// operator>=(const reverse_iterator<Iter1>& x, const reverse_iterator<Iter2>& y);
//
// constexpr in C++17
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class It>
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);
}
int main()
{
const char* s = "1234567890";
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), true);
test(random_access_iterator<const char*>(s+1), random_access_iterator<const char*>(s), false);
test(s, s, true);
test(s, s+1, true);
test(s+1, s, false);
#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);
constexpr RI it3 = std::make_reverse_iterator(p+1);
static_assert( (it1 >= it2), "");
static_assert( (it1 >= it3), "");
}
#endif
}
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