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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// friend constexpr iter_rvalue_reference_t<I>
// iter_move(const counted_iterator& i)
// noexcept(noexcept(ranges::iter_move(i.current)))
// requires input_iterator<I>;
#include <iterator>
#include "test_macros.h"
#include "test_iterators.h"
template<bool IsNoexcept>
class HasNoexceptIterMove
{
int *it_;
public:
typedef std::input_iterator_tag iterator_category;
typedef int value_type;
typedef typename std::iterator_traits<int *>::difference_type difference_type;
typedef int * pointer;
typedef int & reference;
constexpr int *base() const {return it_;}
HasNoexceptIterMove() = default;
explicit constexpr HasNoexceptIterMove(int *it) : it_(it) {}
constexpr reference operator*() const noexcept(IsNoexcept) { return *it_; }
constexpr HasNoexceptIterMove& operator++() {++it_; return *this;}
constexpr HasNoexceptIterMove operator++(int)
{HasNoexceptIterMove tmp(*this); ++(*this); return tmp;}
};
constexpr bool test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
auto iter1 = cpp17_input_iterator<int*>(buffer);
auto commonIter1 = std::counted_iterator<decltype(iter1)>(iter1, 8);
assert(std::ranges::iter_move(commonIter1) == 1);
ASSERT_SAME_TYPE(decltype(std::ranges::iter_move(commonIter1)), int&&);
}
{
auto iter1 = forward_iterator<int*>(buffer);
auto commonIter1 = std::counted_iterator<decltype(iter1)>(iter1, 8);
assert(std::ranges::iter_move(commonIter1) == 1);
ASSERT_SAME_TYPE(decltype(std::ranges::iter_move(commonIter1)), int&&);
}
{
auto iter1 = random_access_iterator<int*>(buffer);
auto commonIter1 = std::counted_iterator<decltype(iter1)>(iter1, 8);
assert(std::ranges::iter_move(commonIter1) == 1);
ASSERT_SAME_TYPE(decltype(std::ranges::iter_move(commonIter1)), int&&);
}
// Test noexceptness.
{
static_assert( noexcept(std::ranges::iter_move(std::declval<std::counted_iterator<HasNoexceptIterMove<true>>>())));
static_assert(!noexcept(std::ranges::iter_move(std::declval<std::counted_iterator<HasNoexceptIterMove<false>>>())));
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
|
