std::experimental::filesystem::directory_options
From cppreference.com
                    
                                        
                    < cpp | experimental | fs
                    
                                                            
                    |   Defined in header  <experimental/filesystem>
  | 
||
|   enum class directory_options {     none,  | 
(filesystem TS) | |
This type represents available options that control the behavior of the directory_iterator and recursive_directory_iterator.
directory_options satisfies the requirements of BitmaskType (which means the bitwise operators operator&, operator|, operator^, operator~, operator&=, operator|=, and operator^= are defined for this type).
Member constants
| Member constant | Value | Meaning | 
|---|---|---|
none
 | 
0 | (Default) Skip directory symlinks, permission denied is error. | 
follow_directory_symlink
 | 
1 | Follow rather than skip directory symlinks. | 
skip_permission_denied
 | 
2 | Skip directories that would otherwise result in permission denied errors. | 
See also
|   constructs a directory iterator  (public member function of std::experimental::filesystem::directory_iterator)  | |
|   constructs a recursive directory iterator  (public member function of std::experimental::filesystem::recursive_directory_iterator)  |