Extrinsically Typed Operational Semantics for Functional Languages

Matteo Cimini (1) , Dale Miller (2) , Jeremy G Siek (3)

1 UMass Lowell - University of Massachusetts [Lowell]
2 PARTOUT - Automatisation et ReprésenTation: fOndation du calcUl et de la déducTion
3 Indiana University [Bloomington]

We present a type system over language definitions that classifies parts of the operational semantics of a language in input, and models a common language design organization. The resulting typing discipline guarantees that the language at hand is automatically type sound. Thanks to the use of types to model language design, our type checker has a high-level view on the language being analyzed and can report messages using the same jargon of language designers. We have implemented our type system in the LANG-N-CHECK tool, and we have applied it to derive the type soundness of several functional languages, including those with recursive types, polymorphism, exceptions, lists, sums, and several common types and operators.

Mots clés: Functional languages; Type soundness; Extrinsic type systems

Domaines: Langage de programmation [cs.PL]; Logique en informatique [cs.LO]

Matteo Cimini, Dale Miller, Jeremy G Siek. Extrinsically Typed Operational Semantics for Functional Languages. SLE 2020 - 13th ACM SIGPLAN/International Conference on Software Language Engineering, Nov 2020, Virtual, United States. ⟨hal-03007256⟩