Effpi: Concurrent Programming with Dependent Behavioural Types
This is a report of ongoing work
Concurrent and distributed programming is notoriously hard. Many languages and software toolkits address the challenge by offering high-level abstractions, such as message-passing processes and actors; they allow for intuitive reasoning, but do not formally ensure that a program implements a given specification.
We address this challenge with Effpi: a toolkit for strongly-typed concurrent programming in Dotty (a.k.a. the future Scala 3 programming language). Effpi allows to specify the intended behaviour of a message-passing application using types: i.e., if a program type-checks and compiles, then it will run and communicate as prescribed by its types.
The foundation of Effpi is a concurrent functional language with a novel blend of behavioural types and a form of dependent types, extending to higher-order interaction (i.e., sending/receiving mobile code). This design has three main advantages. First, it allows to statically verify programs through a combination of type checking and model checking techniques. Second, it is directly implemented (via deep embedding) in Dotty, including a simplified API for strongly-typed actor-based programming. And third, its functional nature allows for an efficient runtime system, supporting highly concurrent programs with millions of interacting processes / actors.
Conference DaySun 13 JanDisplayed time zone: Belfast change
08:30 - 10:30
|Invited Talk: Gradual Session Types — an Ongoing Journey|
Peter ThiemannUniversity of Freiburg, Germany
|Gradual Session Types in Imperative Style|
|Checking the Equivalence of Context-Free Session Types|
Andreia MordidoLasige / Faculty of Sciences, Universidade de Lisboa, Vasco VasconcelosLASIGE, Faculty of Sciences, University of LisbonFile Attached
|Effpi: Concurrent Programming with Dependent Behavioural Types|
Alceste ScalasImperial College London, Elias BenussiImperial College London, Nobuko YoshidaImperial College LondonFile Attached