std::hash (std::vector<bool>)
From cppreference.com
                    
                                        
                    < cpp | container | vector bool
                    
                                                            
                    | template <class Allocator> struct hash<vector<bool, Allocator>>; | (since C++11) | |
The template specialization of std::hash for std::vector<bool> allows users to obtain hashes of objects of type std::vector<bool>.
Example
| This section is incomplete Reason: no example | 
See also
| (C++11) | hash function object (class template) |