Yes, 'const' is part of the interface.The trouble is that when you make it part of the interface, you're making the assumption that **no one** who derives from your class will need mutable state.
How can you ever guarantee that?
Yes, 'const' is part of the interface.The trouble is that when you make it part of the interface, you're making the assumption that **no one** who derives from your class will need mutable state.
How can you ever guarantee that?