- Add assertions to enforce that objects are of the correct kind and
have been allocated.
- Make destructors check if objects have been allocated before
deleting.
- Operations that require a non-NullDevice return failure if given a
NullDevice.
- Use static_cast rather than reinterpret_cast when cohersing from a
base class to a derived class.
Change-Id: I02ee0ea9d7982fd7ca29d49c9b02cfae111b7127
Tony Tye
e5431676d4