Semantics and Verification of Object-Oriented Languages

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NII Shonan Meeting Seminar 063

Atsushi Igarashi: Type Systems for Dynamic Layer Composition

Key features of context-oriented programming (COP) are _layers_—modules to describe context-dependent behavioral variations of a software system—and their _dynamic activation_, which can modify the behavior of multiple objects that have already been instantiated.? Typechecking programs written in a COP language is difficult because the activation of a layer can even change objects’ interfaces.

In this talk we present a few type systems to deal with such dynamic layer compositions.? Starting with a very simple but restrictive type system, we gradually add language features and extend the type system accordingly.

This is a joint work with Hiroaki Inoue, Robert Hirschfeld, and Hidehiko Masuhara.

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