Value-dependent session design in a dependently typed language
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Session Types offer a typing discipline that allows protocol specifications to be used during type-checking, ensuring that implementations adhere to a given specification. When looking to realise global session types in a dependently typed language care must be taken that values introduced in the description are used by roles that know about the value. We present Sessions, a Resource Dependent Embedded Domain Specific Language (EDSL) for describing global session descriptions in the dependently typed language Idris. As we construct session descriptions the values parameterising the EDSLs’ type keeps track of roles and messages they have encountered. We can use this knowledge to ensure that message values are only used by those who know the value. Sessions supports protocol descriptions that are computable, composable, higher-order, and value-dependent. We demonstrate Sessions expressiveness by describing the TCP Handshake, a multi-modal server providing echo and basic arithmetic operations, and a Higher-Order protocol that supports an authentication interaction step.
de Muijnck-Hughes , J , Brady , E C & Vanderbauwhede , W 2019 , Value-dependent session design in a dependently typed language . in F Martins & D Orchard (eds) , Proceedings Programming Language Approaches to Concurrency- and Communication-cEntric Software, Prague, Czech Republic, 7th April 2019 . Electronic Proceedings in Theoretical Computer Science , vol. 291 , Open Publishing Association , pp. 47-59 , Programming Language Approaches to Concurrency- & Communication-cEntric Software (PLACES 2019) , Prague , Czech Republic , 7/04/19 . https://doi.org/10.4204/EPTCS.291.5workshop
Proceedings Programming Language Approaches to Concurrency- and Communication-cEntric Software, Prague, Czech Republic, 7th April 2019
© Jan de Muijnck-Hughes et al. This work is licensed under the Creative Commons Attribution License.
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