blob: e39476a98e9128d02d3d8f59b6702bdb93efe922 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
//===----------------------------------------------------------------------===//
//
// 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 <class U>
// requires HasAssign<Iter, const U&>
// constexpr reverse_iterator&
// operator=(const reverse_iterator<U>& u);
//
// constexpr in C++17
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class It, class U>
void
test(U u)
{
const std::reverse_iterator<U> r2(u);
std::reverse_iterator<It> r1;
std::reverse_iterator<It>& rr = r1 = r2;
assert(r1.base() == u);
assert(&rr == &r1);
}
struct Base {};
struct Derived : Base {};
int main()
{
Derived d;
test<bidirectional_iterator<Base*> >(bidirectional_iterator<Derived*>(&d));
test<random_access_iterator<const Base*> >(random_access_iterator<Derived*>(&d));
test<Base*>(&d);
#if TEST_STD_VER > 14
{
using BaseIter = std::reverse_iterator<const Base *>;
using DerivedIter = std::reverse_iterator<const Derived *>;
constexpr const Derived *p = nullptr;
constexpr DerivedIter it1 = std::make_reverse_iterator(p);
constexpr BaseIter it2 = (BaseIter{nullptr} = it1);
static_assert(it2.base() == p, "");
}
#endif
}
|
