Method resize_uninitialized

src/prevector.h:386–399

    }

    inline void resize_uninitialized(size_type new_size) {
        // resize_uninitialized changes the size of the prevector but does not initialize it.
        // If size < new_size, the added elements must be initialized explicitly.
        if (capacity() < new_size) {
            change_capacity(new_size);
            _size += new_size - size();
            return;
        }
        if (new_size < size()) {
            erase(item_ptr(new_size), end());
        } else {
            _size += new_size - size();
        }
    }

    iterator erase(iterator pos) {
        return erase(pos, pos + 1);