1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <iterator>
11
12// move_iterator
13
14// template <class U>
15//   requires HasConstructor<Iter, const U&>
16//   move_iterator(const move_iterator<U> &u);
17//
18//  constexpr in C++17
19
20#include <iterator>
21#include <cassert>
22
23#include "test_macros.h"
24#include "test_iterators.h"
25
26template <class It, class U>
27void
28test(U u)
29{
30    const std::move_iterator<U> r2(u);
31    std::move_iterator<It> r1 = r2;
32    assert(r1.base() == u);
33}
34
35struct Base {};
36struct Derived : Base {};
37
38int main()
39{
40    Derived d;
41
42    test<input_iterator<Base*> >(input_iterator<Derived*>(&d));
43    test<forward_iterator<Base*> >(forward_iterator<Derived*>(&d));
44    test<bidirectional_iterator<Base*> >(bidirectional_iterator<Derived*>(&d));
45    test<random_access_iterator<const Base*> >(random_access_iterator<Derived*>(&d));
46    test<Base*>(&d);
47
48#if TEST_STD_VER > 14
49    {
50    constexpr const Derived *p = nullptr;
51    constexpr std::move_iterator<const Derived *>     it1 = std::make_move_iterator(p);
52    constexpr std::move_iterator<const Base *>        it2(it1);
53    static_assert(it2.base() == p);
54    }
55#endif
56}
57