Answer — this cannot be done without more information about the ownership and nullability of m_data.

If VecOfInts doesn’t own m_data at all then these methods could be the same as the copy constructor and assignment operator.

If VecOfInts owns m_data but that field is not nullable then you’d unfortunately have to do some sort of ugliness to put something into the m_data that you have moved out of.

Only if m_data is owned by VecOfInts and is nullable can you actually “move” in any neat fashion.