std::filesystem::begin(recursive_directory_iterator), std::filesystem::end(recursive_directory_iterator)
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C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Filesystem library
std::filesystem::recursive_directory_iterator
Member functions
Non-member functions
begin(std::filesystem::recursive_directory_iterator)end(std::filesystem::recursive_directory_iterator)
Defined in header
<filesystem>
recursive_directory_iterator begin( recursive_directory_iterator iter ) noexcept;
(1)
(since C++17)
recursive_directory_iterator end( recursive_directory_iterator ) noexcept;
(2)
(since C++17)
1) Returns iter unchanged.
2) Returns a default-constructed recursive_directory_iterator, which serves as the end iterator. The argument is ignored.
These non-member functions enable the use of recursive_directory_iterators with range-based for loops and make recursive_directory_iterator a range type(since C++20).
[edit] Parameters
iter
-
a
recursive_directory_iterator
[edit] Return value
1) iter unchanged.
2) End iterator (default-constructed
recursive_directory_iterator).[edit] Example
Run this code
#include <cstdlib> #include <filesystem> #include <fstream> #include <iostream> namespace fs = std::filesystem; int main() { fs::current_path(fs::temp_directory_path()); fs::create_directories("sandbox/a/b"); std::ofstream ("sandbox/file1.txt"); fs::create_symlink("a", "sandbox/syma"); std::cout << "Print dir structure using OS specific command 'tree':\n"; std::system ("tree --noreport sandbox"); std::cout << "\nPrint dir structure using directory iterator:\n"; for (auto& p : fs::recursive_directory_iterator("sandbox")) std::cout << p << '\n'; fs::remove_all("sandbox"); }
Possible output:
Print dir structure using OS specific command 'tree': sandbox ├── a │ └── b ├── file1.txt └── syma -> a Print dir structure using directory iterator: "sandbox/syma" "sandbox/file1.txt" "sandbox/a" "sandbox/a/b"
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 3480 | C++17 | end took the argument by reference
|
takes the argument by value |