std::filesystem::directory_iterator
文件系统：：目录[医]迭代器
| Defined in header | | |
|---|---|---|
| class directory_iterator; | | (since C++17) |
directory_iterator是InputIterator，则遍历directory_entry目录%28的元素，但不访问子目录%29。迭代顺序未指定，只是每个目录条目只访问一次。跳过特殊路径名点和点点.
如果directory_iterator在最后一个目录条目之后，它就等于默认构造的迭代器(也称为结束迭代器)。两个结束迭代器总是相等的，取消引用或递增结束迭代器是未定义的行为。
如果在创建目录迭代器后删除或添加文件或目录树，则未指定是否通过迭代器观察更改。
成员类型
| Member type | Definition |
|---|---|
| value_type | std::filesystem::directory_entry |
| difference_type | std::ptrdiff_t |
| pointer | const std::filesystem::directory_entry* |
| reference | const std::filesystem::directory_entry& |
| iterator_category | std::input_iterator_tag |
成员函数
| (constructor) | constructs a directory iterator (public member function) |
|---|---|
| (destructor) | default destructor (public member function) |
| operator= | assigns contents (public member function) |
| operator*operator-> | accesses the pointed-to entry (public member function) |
| incrementoperator++ | advances to the next entry (public member function) |
非会员职能
| begin(std::filesystem::directory_iterator)end(std::filesystem::directory_iterator) | range-based for loop support (function) |
|---|
此外，operator==和operator!=提供，或作为成员或非会员，按InputIterator...
例
二次
#include <fstream>
#include <iostream>
#include <filesystem>
namespace fs = std::filesystem;
int main()
{
fs::create_directories("sandbox/a/b"
std::ofstream("sandbox/file1.txt"
std::ofstream("sandbox/file2.txt"
for(auto& p: fs::directory_iterator("sandbox"))
std::cout << p << '\n';
fs::remove_all("sandbox"
}
二次
可能的产出：
二次
"sandbox/a"
"sandbox/file1.txt"
"sandbox/file2.txt"
二次
另见
| recursive_directory_iterator (C++17) | an iterator to the contents of a directory and its subdirectories (class) |
|---|---|
| directory_options (C++17) | options for iterating directory contents (enum) |
| directory_entry (C++17) | a directory entry (class) |
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