C++

28.2    Regular Expressions

C++ now natively supports regular expressions. With them, you can search for patterns in strings and extract parts of them.

// https://godbolt.org/z/T1YMoM5as#include <string>#include <iostream>#include <regex>using std::regex; using std::sregex_iterator; using std::string;const regex rgxMobile(R"(01[567]\d{6,10})");     // Mobile phone [phone]bool isMobilephone(const string& text) {  return std::regex_match(text, rgxMobile);      // Does the text match completely?}bool containsMobilephone(const string &text) {  return std::regex_search(text, rgxMobile);     // somewhere in the text?}void listMobilephones(const string &text) {  sregex_iterator begin{ text.cbegin(), text.cend(), rgxMobile };  sregex_iterator end;  for(auto it = begin; ...