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- What is returned in std::smatch and how are you supposed to use it?
The std::smatch is an instantiation of the match_results class template for matches on string objects (with string::const_iterator as its iterator type) The members of this class are those described for match_results, but using string::const_iterator as its BidirectionalIterator template parameter
- C++: Matching regex, what is in smatch? - Stack Overflow
The type of matches is a std::match_results, not a vector, but it does have an operator[] From the reference: If n == 0, returns a reference to the std::sub_match representing the part of the target sequence matched by the entire matched regular expression
- regex - Why do a C++ regular expression code that works with cmatch . . .
smatch will contain iterators into the string you are searching for regex_search(string("xabcd"), mr, rx) creates a temporary string that dies at the ; Therefore by the time you use mr at the next line, it refers to invalidated memory The string should live longer than mr
- c++ - how to iterate all regex matches in a std::string with their . . .
I know two ways of getting regex matches from std::string, but I don't know how to get all matches with their respective offsets
- Understanding c++ regex by a simple example - Stack Overflow
You still get the entire match but the entire match does not fit the entire string it fits the entire regex For example consider this:
- Regex: Using smatch on a non-const string - Stack Overflow
The problem is that smatch implies that the Bidirectional iterator type used for regex_search is a std::string::const_iterator: Basically it's an alias that looks like this: using std::smatch = std::match_results<std::string::const_iterator>; So when you call regex_search with a non-const iterator begin() and end() it fails to deduce the proper
- c++ - Как вывести контейнер smatch - Stack Overflow на русском
Ещё хочется отметить, что std::smatch содержит одно совпадение и совпадения внутри этого совпадения Для поиска всех вхождений выражения можно использовать std::regex_token_iterator
- How to match multiple results using std::regex - Stack Overflow
For example, If I have a string like "first second third forth" and I want to match every single word in one operation to output them one by one
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