std::filesystem::path::has_root_path, std::filesystem::path::has_root_name, std::filesystem::path::has_root_directory
From cppreference.com
                    
                                        
                    < cpp | filesystem | path
                    
                                                            
                    | bool has_root_path() const; | (1) | (since C++17) | 
| bool has_root_name() const; | (2) | (since C++17) | 
| bool has_root_directory() const; | (3) | (since C++17) | 
| bool has_relative_path() const; | (4) | (since C++17) | 
| bool has_parent_path() const; | (5) | (since C++17) | 
| bool has_filename() const; | (6) | (since C++17) | 
| bool has_stem() const; | (7) | (since C++17) | 
| bool has_extension() const; | (8) | (since C++17) | 
Checks whether the path contains the corresponding path element.
1) Checks whether root_path() is empty.
2) Checks whether root_name() is empty.
3) Checks whether root_directory() is empty.
4) Checks whether relative_path() is empty.
5) Checks whether parent_path() is empty.
6) Checks whether filename() is empty.
7) Checks whether stem() is empty.
8) Checks whether extension() is empty.
| Contents | 
[edit] Parameters
(none)
[edit] Return value
true if the corresponding path component is not empty, false otherwise.
[edit] Exceptions
(none)
[edit] See also
| checks if the path is empty (public member function) | 


