Cpp Coding Standards/DESIGN/DIP

Dependency inversion principle (DIP):

• high-level modules should not depend on low-level ones. Instead, they should both depend on abstractions.
• abstractions should not depend on details, but details should depend on abstractions.

Implement DIP by using abstract interfaces (a class consisting of pure virtual functions only). Typically, provide a public virtual destructor to facilitate polymprphic deletion.

See the original article for further explanation.