Separation, abstraction, multiple inheritance and view shifting

Abstract

Inheritance is a central mechanism in object-oriented programming. Many popular object-oriented languages support multiple inheritance or limited versions thereof. This work extends a powerful modular proof system for single inheritance, which uses separation logic and abstract predicate families, to multiple inheritance. The extended system allows view shifting in the logic: the ability to view an object under different abstractions and to shift between such views. Several examples illustrate the system’s use and utility.