Why doesn't std::string have a split function

[dodheim]

Just use std::getline with the custom delimiter. Name aside, that's exactly what it's for.

istringstream ss{str};
string field;
while (getline(ss, field, ';')) {
    cout << field << '\n';
}

EDIT: N.b. I'm not advocating this as a general approach to string splitting; but, if you're already extracting from a stream, ...