std::regex_iterator::regex_iterator
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                    < cpp | regex | regex iterator
                    
                                                            
                    | regex_iterator(); | (1) | (since C++11) | 
| regex_iterator(BidirIt a, BidirIt b,                const regex_type& re, | (2) | (since C++11) | 
| regex_iterator(const regex_iterator&); | (3) | (since C++11) | 
| regex_iterator(BidirIt, BidirIt,                const regex_type&&, | (4) | (since C++14) | 
Constructs a new regex_iterator:
1) Default constructor.  Constructs an end-of-sequence iterator.
2) Constructs a 
regex_iterator from the sequence of characters [a, b), the regular expression re, and a flag m that governs matching behavior.  This constructor performs an initial call to std::regex_search with this data.  If the result of this initial call is false, *this is set to an end-of-sequence iterator.3) Copies a 
regex_iterator.4) The overload 2 is not allowed to be called with a temporary regex, since the returned iterator would be immediately invalidated.
[edit] Parameters
| a | - | BidirItto the beginning of the target character sequence | 
| b | - | BidirItto the end of the targe character sequence | 
| re | - | regular expression used to search the target character sequence | 
| m | - | flags that govern the behavior of re | 
[edit] Example
| This section is incomplete Reason: no example | 


