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Thu 21 Jan 2016 16:30 - 16:55 at Grand Bay South - Track 2: Sessions and processes Chair(s): Matteo Maffei

Effect and session type systems are two expressive behavioural type systems. The former is usually developed in the context of the lambda-calculus and its variants, the latter for the π-calculus. In this paper we explore their relative expressive power. Firstly, we give an embedding from PCF, augmented with a parameterised effect system, into a session-typed π-calculus (session calculus), showing that session types are powerful enough to express effects. Secondly, we give a reverse embedding, from the session calculus back into PCF, by instantiating PCF with concurrency primitives and its effect system with a session-like effect algebra; effect systems are powerful enough to express sessions. The embedding of session types into an effect system is leveraged to give a new implementation of session types in Haskell, via an effect system encoding. The correctness of this implementation follows from the second embedding result. We also discuss various extensions to our embeddings.

Thu 21 Jan
Times are displayed in time zone: (GMT-05:00) Guadalajara, Mexico City, Monterrey change

16:30 - 17:45: Research Papers - Track 2: Sessions and processes at Grand Bay South
Chair(s): Matteo MaffeiSaarland University
POPL-2016-papers16:30 - 16:55
Dominic OrchardImperial College London, Nobuko YoshidaImperial College London, UK
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POPL-2016-papers16:55 - 17:20
Limin JiaCarnegie Mellon University, Hannah GommerstadtCarnegie Mellon University, Frank PfenningCarnegie Mellon University
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POPL-2016-papers17:20 - 17:45
Davide SangiorgiUniversity of Bologna, Valeria VignudelliUniversity of Bologna/INRIA
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