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// REQUIRES: can-create-symlinks
10// UNSUPPORTED: c++03, c++11, c++14
11// UNSUPPORTED: no-filesystem
12// UNSUPPORTED: availability-filesystem-missing
13
14// <filesystem>
15
16// class recursive_directory_iterator
17
18// void pop();
19// void pop(error_code& ec);
20
21#include <filesystem>
22#include <set>
23#include <cassert>
24
25#include "test_macros.h"
26#include "filesystem_test_helper.h"
27namespace fs = std::filesystem;
28using namespace fs;
29
30static void signature_tests()
31{
32 recursive_directory_iterator it{}; ((void)it);
33 std::error_code ec; ((void)ec);
34 ASSERT_NOT_NOEXCEPT(it.pop());
35 ASSERT_NOT_NOEXCEPT(it.pop(ec)); // may require allocation or other things
36}
37
38// NOTE: Since the order of iteration is unspecified we use a list of
39// seen files at each depth to determine the new depth after a 'pop()' operation.
40static void test_depth()
41{
42 static_test_env static_env;
43 const recursive_directory_iterator endIt{};
44
45 auto& DE0 = static_env.DirIterationList;
46 std::set<path> notSeenDepth0(DE0.begin(), DE0.end());
47
48 auto& DE1 = static_env.DirIterationListDepth1;
49 std::set<path> notSeenDepth1(DE1.begin(), DE1.end());
50
51 std::error_code ec;
52 recursive_directory_iterator it(static_env.Dir, ec);
53 assert(it != endIt);
54 assert(it.depth() == 0);
55
56 while (it.depth() != 2) {
57 if (it.depth() == 0)
58 notSeenDepth0.erase(x: it->path());
59 else
60 notSeenDepth1.erase(x: it->path());
61 ++it;
62 assert(it != endIt);
63 }
64
65 while (true) {
66 auto set_ec = std::make_error_code(e: std::errc::address_in_use);
67 it.pop(set_ec);
68 assert(!set_ec);
69
70 if (it == endIt) {
71 // We must have seen every entry at depth 0 and 1.
72 assert(notSeenDepth0.empty() && notSeenDepth1.empty());
73 break;
74 }
75 else if (it.depth() == 1) {
76 // If we popped to depth 1 then there must be unseen entries
77 // at this level.
78 assert(!notSeenDepth1.empty());
79 assert(notSeenDepth1.count(it->path()));
80 notSeenDepth1.clear();
81 }
82 else if (it.depth() == 0) {
83 // If we popped to depth 0 there must be unseen entries at this
84 // level. There should also be no unseen entries at depth 1.
85 assert(!notSeenDepth0.empty());
86 assert(notSeenDepth1.empty());
87 assert(notSeenDepth0.count(it->path()));
88 notSeenDepth0.clear();
89 }
90 }
91}
92
93int main(int, char**) {
94 signature_tests();
95 test_depth();
96
97 return 0;
98}
99

source code of libcxx/test/std/input.output/filesystems/class.rec.dir.itr/rec.dir.itr.members/pop.pass.cpp