C++ - Split string by regex

Question

I want to split std::string by regex.

I have found some solutions on Stackoverflow, but most of them are splitting string by single space o

Answer 1

string s = "foo bar  baz";
regex e("\\s+");
regex_token_iterator i(s.begin(), s.end(), e, -1);
regex_token_iterator end;
while (i != end)
   cout << " [" << *i++ << "]";

prints [foo] [bar] [baz]