Subtyping supports safe session substitution

Gay, S. J. (2016) Subtyping supports safe session substitution. Lecture Notes in Computer Science, 9600, pp. 95-108. (doi:10.1007/978-3-319-30936-1_5)

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Abstract

Session types describe the structure of bi-directional point-to-point communication channels by specifying the sequence and format of messages on each channel. A session type defines a communication protocol. Type systems that include session types are able to statically verify that communication-based code generates, and responds to, messages according to a specified protocol. It is natural to consider subtyping for session types, but the literature contains conflicting definitions. It is now folklore that one definition is based on safe substitutability of channels, while the other is based on safe substitutability of processes. We explain this point in more detail, and show how to unify the two views.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gay, Professor Simon
Authors: Gay, S. J.
College/School:College of Science and Engineering > School of Computing Science
Journal Name:Lecture Notes in Computer Science
Publisher:Springer
ISSN:0302-9743
ISSN (Online):1611-3349
Copyright Holders:Copyright © 2016 Springer International Publishing
First Published:First published in Lecture Notes in Computer Science 9600:95-108
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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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 & Physical Sciences Research Council (EPSRC)EP/K034413/1COM - COMPUTING SCIENCE
614451Exploiting Parallelism through Type Transformations for Hybrid Manycore Systems.Wim VanderbauwhedeEngineering & Physical Sciences Research Council (EPSRC)EP/L00058X/1COM - COMPUTING SCIENCE
625521COST Action IC1201: Behavioural Types for Reliable Large-Scale Software System (BETTY)Simon GayEuropean Commission (EC)CGA-IC1201-1COM - COMPUTING SCIENCE