std::experimental::filesystem::begin(directory_iterator), std::experimental::filesystem::end(directory_iterator)

directory_iterator begin( directory_iterator iter );

directory_iterator end( const directory_iterator& );

#include <experimental/filesystem>
#include <fstream>
#include <iostream>
namespace fs = std::experimental::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");
}