1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14, c++17
10
11// constexpr const I& base() const &;
12// constexpr I base() &&;
13
14#include <iterator>
15
16#include "test_macros.h"
17#include "test_iterators.h"
18
19struct InputOrOutputArchetype {
20 using difference_type = int;
21
22 int *ptr;
23
24 int operator*() { return *ptr; }
25 void operator++(int) { ++ptr; }
26 InputOrOutputArchetype& operator++() { ++ptr; return *this; }
27};
28
29constexpr bool test() {
30 int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
31
32 {
33 std::counted_iterator iter(cpp20_input_iterator<int*>{buffer}, 8);
34 assert(base(iter.base()) == buffer);
35 assert(base(std::move(iter).base()) == buffer);
36
37 ASSERT_NOEXCEPT(iter.base());
38 ASSERT_SAME_TYPE(decltype(iter.base()), const cpp20_input_iterator<int*>&);
39 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), cpp20_input_iterator<int*>);
40 }
41
42 {
43 std::counted_iterator iter(forward_iterator<int*>{buffer}, 8);
44 assert(base(iter.base()) == buffer);
45 assert(base(std::move(iter).base()) == buffer);
46
47 ASSERT_SAME_TYPE(decltype(iter.base()), const forward_iterator<int*>&);
48 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), forward_iterator<int*>);
49 }
50
51 {
52 std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 8);
53 assert(base(iter.base()) == buffer);
54 assert(base(std::move(iter).base()) == buffer);
55
56 ASSERT_SAME_TYPE(decltype(iter.base()), const contiguous_iterator<int*>&);
57 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), contiguous_iterator<int*>);
58 }
59
60 {
61 std::counted_iterator iter(InputOrOutputArchetype{.ptr: buffer}, 6);
62 assert(iter.base().ptr == buffer);
63 assert(std::move(iter).base().ptr == buffer);
64
65 ASSERT_SAME_TYPE(decltype(iter.base()), const InputOrOutputArchetype&);
66 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), InputOrOutputArchetype);
67 }
68
69 {
70 const std::counted_iterator iter(cpp20_input_iterator<int*>{buffer}, 8);
71 assert(base(iter.base()) == buffer);
72 assert(base(std::move(iter).base()) == buffer);
73
74 ASSERT_SAME_TYPE(decltype(iter.base()), const cpp20_input_iterator<int*>&);
75 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), const cpp20_input_iterator<int*>&);
76 }
77
78 {
79 const std::counted_iterator iter(forward_iterator<int*>{buffer}, 7);
80 assert(base(iter.base()) == buffer);
81 assert(base(std::move(iter).base()) == buffer);
82
83 ASSERT_SAME_TYPE(decltype(iter.base()), const forward_iterator<int*>&);
84 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), const forward_iterator<int*>&);
85 }
86
87 {
88 const std::counted_iterator iter(contiguous_iterator<int*>{buffer}, 6);
89 assert(base(iter.base()) == buffer);
90 assert(base(std::move(iter).base()) == buffer);
91
92 ASSERT_SAME_TYPE(decltype(iter.base()), const contiguous_iterator<int*>&);
93 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), const contiguous_iterator<int*>&);
94 }
95
96 {
97 const std::counted_iterator iter(InputOrOutputArchetype{buffer}, 6);
98 assert(iter.base().ptr == buffer);
99 assert(std::move(iter).base().ptr == buffer);
100
101 ASSERT_SAME_TYPE(decltype(iter.base()), const InputOrOutputArchetype&);
102 ASSERT_SAME_TYPE(decltype(std::move(iter).base()), const InputOrOutputArchetype&);
103 }
104
105 return true;
106}
107
108int main(int, char**) {
109 test();
110 static_assert(test());
111
112 return 0;
113}
114

source code of libcxx/test/std/iterators/predef.iterators/counted.iterator/base.pass.cpp