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
10// UNSUPPORTED: availability-filesystem-missing
11
12// <filesystem>
13
14// class path
15
16// template <class Source>
17// path(const Source& source);
18// template <class InputIterator>
19// path(InputIterator first, InputIterator last);
20
21
22#include <filesystem>
23#include <cassert>
24#include <iterator>
25#include <type_traits>
26
27#include "test_macros.h"
28namespace fs = std::filesystem;
29
30template <class Iter1, class Iter2>
31bool checkCollectionsEqual(
32 Iter1 start1, Iter1 const end1
33 , Iter2 start2, Iter2 const end2
34 )
35{
36 while (start1 != end1 && start2 != end2) {
37 if (*start1 != *start2) {
38 return false;
39 }
40 ++start1; ++start2;
41 }
42 return (start1 == end1 && start2 == end2);
43}
44
45template <class Iter1, class Iter2>
46bool checkCollectionsEqualBackwards(
47 Iter1 const start1, Iter1 end1
48 , Iter2 const start2, Iter2 end2
49 )
50{
51 while (start1 != end1 && start2 != end2) {
52 --end1; --end2;
53 if (*end1 != *end2) {
54 return false;
55 }
56 }
57 return (start1 == end1 && start2 == end2);
58}
59
60void checkIteratorConcepts() {
61 using namespace fs;
62 using It = path::iterator;
63 using Traits = std::iterator_traits<It>;
64 ASSERT_SAME_TYPE(path::const_iterator, It);
65#if TEST_STD_VER > 17
66 static_assert(std::bidirectional_iterator<It>);
67#endif
68 ASSERT_SAME_TYPE(Traits::value_type, path);
69 LIBCPP_STATIC_ASSERT(std::is_same<Traits::iterator_category, std::input_iterator_tag>::value, "");
70 LIBCPP_STATIC_ASSERT(std::is_same<Traits::pointer, path const*>::value, "");
71 LIBCPP_STATIC_ASSERT(std::is_same<Traits::reference, path>::value, "");
72 {
73 It it;
74 ASSERT_SAME_TYPE(It&, decltype(++it));
75 ASSERT_SAME_TYPE(It, decltype(it++));
76 ASSERT_SAME_TYPE(It&, decltype(--it));
77 ASSERT_SAME_TYPE(It, decltype(it--));
78 ASSERT_SAME_TYPE(Traits::reference, decltype(*it));
79 ASSERT_SAME_TYPE(Traits::pointer, decltype(it.operator->()));
80#ifdef _WIN32
81 ASSERT_SAME_TYPE(std::wstring const&, decltype(it->native()));
82#else
83 ASSERT_SAME_TYPE(std::string const&, decltype(it->native()));
84#endif
85 ASSERT_SAME_TYPE(bool, decltype(it == it));
86 ASSERT_SAME_TYPE(bool, decltype(it != it));
87 }
88 {
89 path const p;
90 ASSERT_SAME_TYPE(It, decltype(p.begin()));
91 ASSERT_SAME_TYPE(It, decltype(p.end()));
92 assert(p.begin() == p.end());
93 }
94}
95
96void checkBeginEndBasic() {
97 using namespace fs;
98 using It = path::iterator;
99 {
100 path const p;
101 ASSERT_SAME_TYPE(It, decltype(p.begin()));
102 ASSERT_SAME_TYPE(It, decltype(p.end()));
103 assert(p.begin() == p.end());
104 }
105 {
106 path const p("foo");
107 It default_constructed;
108 default_constructed = p.begin();
109 assert(default_constructed == p.begin());
110 assert(default_constructed != p.end());
111 default_constructed = p.end();
112 assert(default_constructed == p.end());
113 assert(default_constructed != p.begin());
114 }
115 {
116 path p("//root_name//first_dir////second_dir");
117#ifdef _WIN32
118 const path expect[] = {"//root_name", "/", "first_dir", "second_dir"};
119#else
120 const path expect[] = {"/", "root_name", "first_dir", "second_dir"};
121#endif
122 assert(checkCollectionsEqual(p.begin(), p.end(), std::begin(expect), std::end(expect)));
123 assert(checkCollectionsEqualBackwards(p.begin(), p.end(), std::begin(expect), std::end(expect)));
124 }
125 {
126 path p("////foo/bar/baz///");
127 const path expect[] = {"/", "foo", "bar", "baz", ""};
128 assert(checkCollectionsEqual(p.begin(), p.end(), std::begin(expect), std::end(expect)));
129 assert(checkCollectionsEqualBackwards(p.begin(), p.end(), std::begin(expect), std::end(expect)));
130 }
131}
132
133int main(int, char**) {
134 using namespace fs;
135 checkIteratorConcepts();
136 checkBeginEndBasic(); // See path.decompose.pass.cpp for more tests.
137
138 return 0;
139}
140

source code of libcxx/test/std/input.output/filesystems/class.path/path.itr/iterator.pass.cpp