Session types revisited

Dardha, O. , Giachino, E. and Sangiorgi, D. (2017) Session types revisited. Information and Computation, 256, pp. 253-286. (doi: 10.1016/j.ic.2017.06.002)

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Session types are a formalism used to model structured communication-based programming. A binary session type describes communication by specifying the type and direction of data exchanged between two parties. When session types and session processes are added to the syntax of standard π-calculus they give rise to additional separate syntactic categories. As a consequence, when new type features are added, there is duplication of effort in the theory: the proofs of properties must be checked both on standard types and on session types. We show that session types are encodable into standard π- types, relying on linear and variant types. Besides being an expressivity result, the encoding (i) removes the above redundancies in the syntax, and (ii) the properties of session types are derived as straightforward corollaries, exploiting the corresponding properties of standard π-types. The robustness of the encoding is tested on a few extensions of session types, including subtyping, polymorphism and higher-order communications.

Item Type:Articles
Keywords:Session types, π-calculus, linear types, variant types, encoding.
Glasgow Author(s) Enlighten ID:Dardha, Dr Ornela
Authors: Dardha, O., Giachino, E., and Sangiorgi, D.
Subjects:Q Science > Q Science (General)
Q Science > QA Mathematics
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
College/School:College of Science and Engineering > School of Computing Science
Journal Name:Information and Computation
ISSN (Online):1090-2651
Published Online:07 June 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Information and Computation 256: 253-286
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
612411From Data Types to Session Types - A Basis for Concurrency and Distribution.Simon GayEngineering and Physical Sciences Research Council (EPSRC)EP/K034413/1COM - COMPUTING SCIENCE