operator==,!=,<,<=,>,>=(std::thread::id)
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | bool operator==( thread::id lhs, thread::id rhs ); | (1) | (since C++11) | 
| bool operator!=( thread::id lhs, thread::id rhs ); | (2) | (since C++11) | 
| bool operator<( thread::id lhs, thread::id rhs ); | (3) | (since C++11) | 
| bool operator<=( thread::id lhs, thread::id rhs ); | (4) | (since C++11) | 
| bool operator>( thread::id lhs, thread::id rhs ); | (5) | (since C++11) | 
| bool operator>=( thread::id lhs, thread::id rhs ); | (6) | (since C++11) | 
Compares two thread identifiers.
1-2) Checks whether 
lhs and rhs represent either the same thread, or no thread.3-6) Compares 
lhs and rhs in such a way, that lhs and rhs are totally ordered.| Contents | 
[edit] Parameters
| lhs, rhs | - | thread identifiers to compare | 
[edit] Return value
true whether the corresponding relation holds, false otherwise.
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] Complexity
Constant.


