Ownership, encapsulation and the disjointness of type and effect

  • Authors:
  • Dave Clarke;Sophia Drossopoulou

  • Affiliations:
  • Utrecht University, Utrecht, The Netherlands;Imperial College, London, Great Britain

  • Venue:
  • OOPSLA '02 Proceedings of the 17th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
  • Year:
  • 2002

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Abstract

Ownership types provide a statically enforceable notion of object-level encapsulation. We extend ownership types with computational effects to support reasoning about object-oriented programs. The ensuing system provides both access control and effects reporting. Based on this type system, we codify two formal systems for reasoning about aliasing and the disjointness of computational effects. The first can be used to prove that evaluation of two expressions will never lead to aliases, while the latter can be used to show the non-interference of two expressions.