std::filesystem::begin(recursive_directory_iterator), (3) Linux Manual Page

std::filesystem::begin(recursive_directory_iterator),std::filesystem::end(recursive_directory_iterator) – std::filesystem::begin(recursive_directory_iterator),std::filesystem::end(recursive_directory_iterator)

Synopsis

recursive_directory_iterator begin( recursive_directory_iterator iter ) noexcept; (1) (since C++17)
recursive_directory_iterator end( const 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.

Parameters

iter – a recursive_directory_iterator

Return value

1) iter unchanged
2) End iterator (default-constructed recursive_directory_iterator)

Example

// Run this code

#include <fstream>

#include <iostream>

#include <filesystem>

namespace fs = std::filesystem;
int main()

{
    fs::create_directories("sandbox/a/b");
    std::ofstream("sandbox/file1.txt");
    fs::create_symlink("a", "sandbox/syma");
    for (auto &p : fs::recursive_directory_iterator("sandbox"))
        std::cout << p << '\n';
    fs::remove_all("sandbox");
}

Possible output:

  "sandbox/a"
  "sandbox/a/b"
  "sandbox/file1.txt"
  "sandbox/syma"

See also

                                           range-based for loop support
begin(std::filesystem::directory_iterator) (function)
end(std::filesystem::directory_iterator)