не могу разобраться c boost.filesystem - Boost C++ - Ответ 2883508

path p ("./");
  try
  {
    if (exists(p))    // does p actually exist?
    {
      if (is_regular_file(p))        // is p a regular file?
        cout << p << " size is " << file_size(p) << '\n';
 
      else if (is_directory(p))      // is p a directory?
      {
        cout << p << " is a directory containing:\n";
 
        copy(directory_iterator(p), directory_iterator(),  // directory_iterator::value_type
          ostream_iterator<directory_entry>(cout, "\n"));  // is directory_entry, which is
                                                           // converted to a path by the
                                                           // path stream inserter
      }
      else
        cout << p << " exists, but is neither a regular file nor a directory\n";
    }
    else
      cout << p << " does not exist\n";
  }
 
  catch (const filesystem_error& ex)
  {
    cout << ex.what() << '\n';
  }