C++, remove all duplicated, multiple value in sorted vector

template <class T> void removeAllDuplicates(vector<T>& vec) { size_t i; size_t pos = 0; for (i = 1; i < vec.size(); i++) { if (vec[i] != vec[pos]) { pos++; vec[pos] = vec[i]; } } vec.erase(vec.begin() + pos + 1, vec.end()); }