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Showing content from https://timsong-cpp.github.io/cppwp/n4659/re.regiter.cnstr below:

[re.regiter.cnstr]

31 Regular expressions library [re] 31.12 Regular expression iterators [re.iter] 31.12.1 Class template regex_­iterator [re.regiter] 31.12.1.1 regex_­iterator constructors [re.regiter.cnstr]

regex_iterator();

Effects: Constructs an end-of-sequence iterator.

regex_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re, regex_constants::match_flag_type m = regex_constants::match_default);

Effects: Initializes begin and end to a and b, respectively, sets pregex to &re, sets flags to m, then calls regex_­search(begin, end, match, *pregex, flags). If this call returns false the constructor sets *this to the end-of-sequence iterator.


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