Method insert

uspace/lib/cpp/include/__bits/adt/vector.hpp:415–423

            }

            iterator insert(const_iterator position, const value_type& x)
            {
                auto pos = const_cast<iterator>(position);

                pos = shift_(pos, 1);
                *pos = x;

                return pos;
            }

            iterator insert(const_iterator position, value_type&& x)
            {