std::chrono::operator ==,!=,<,<=,>,>= (std::chrono::link)
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   bool operator==(const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(1) | (since C++20) | 
|   bool operator!=(const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(2) | (since C++20) | 
|   bool operator< (const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(3) | (since C++20) | 
|   bool operator> (const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(4) | (since C++20) | 
|   bool operator<=(const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(5) | (since C++20) | 
|   bool operator>=(const std::chrono::link& x, const std::chrono::link& y) noexcept;  | 
(6) | (since C++20) | 
Compares the two link objects x and y by name.
Return value
1) x.name() == y.name().
2) x.name() != y.name().
3) x.name() < y.name().
4) x.name() > y.name().
5) x.name() <= y.name().
6) x.name() >= y.name().