cpp/regex/regex token iterator/operator cmp
From cppreference.com
                    
                                        
                    < cpp | regex | regex token iterator
                    
                                                            
                    |   bool operator==( const regex_token_iterator& other ) const;  | 
(since C++11) | |
|   bool operator!=( const regex_token_iterator& other ) const;  | 
(since C++11) | |
Checks whether *this and other are equivalent.
Two regex token iterators are equal if:
a) They are both end-of-sequence iterators
b) They are both suffix iterators and the suffixes are equal.
c) Neither of them is end-of-sequence or suffix iterator and:
- position == other.position
 - N == other.N
 - subs == other.subs
 
1) Checks whether *this is equal to 
other.2) Checks whether *this is not equal to 
other.[edit] Parameters
| other | - | another regex token iterator to compare to | 
[edit] Return value
1) true if *this is equal to 
other, false otherwise.2) true if *this is not equal to 
other, false otherwise.