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Published in:
2009 | OriginalPaper | Chapter
Global Principal Typing in Partially Commutative Asynchronous Sessions
Authors : Dimitris Mostrous, Nobuko Yoshida, Kohei Honda
Published in: Programming Languages and Systems
Publisher: Springer Berlin Heidelberg
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We generalise a theory of multiparty session types for the
π
-calculus through asynchronous communication subtyping, which allows partial commutativity of actions with maximal flexibility and safe optimisation in message choreography. A sound and complete algorithm for the subtyping relation, which can calculate conformance of optimised end-point processes to an agreed global specification, is presented. As a complementing result, we show a type inference algorithm for deriving the principal global specification from end-point processes which is minimal with respect to subtyping. The resulting theory allows a programmer to choose between a top-down and a bottom-up style of communication programming, ensuring the same desirable properties of typable processes.