blob: ecf3b61058b7f563bad75af6e140038e7040e402 [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>
// move_iterator
// requires RandomAccessIterator<Iter>
// unspecified operator[](difference_type n) const;
//
// constexpr in C++17
#include <iterator>
#include <cassert>
#include <memory>
#include "test_macros.h"
#include "test_iterators.h"
template <class It>
void
test(It i, typename std::iterator_traits<It>::difference_type n,
typename std::iterator_traits<It>::value_type x)
{
typedef typename std::iterator_traits<It>::value_type value_type;
const std::move_iterator<It> r(i);
value_type rr = r[n];
assert(rr == x);
}
struct do_nothing
{
void operator()(void*) const {}
};
int main(int, char**)
{
{
char s[] = "1234567890";
test(random_access_iterator<char*>(s+5), 4, '0');
test(s+5, 4, '0');
}
#if TEST_STD_VER >= 11
{
int i[5];
typedef std::unique_ptr<int, do_nothing> Ptr;
Ptr p[5];
for (unsigned j = 0; j < 5; ++j)
p[j].reset(i+j);
test(p, 3, Ptr(i+3));
}
#endif
#if TEST_STD_VER > 14
{
constexpr const char *p = "123456789";
typedef std::move_iterator<const char *> MI;
constexpr MI it1 = std::make_move_iterator(p);
static_assert(it1[0] == '1', "");
static_assert(it1[5] == '6', "");
}
#endif
return 0;
}