Scala step-by-step: Soundness for DOT with step-indexed logical relations in Iris

The metatheory of Scala's core type system - the Dependent Object Types (DOT) calculus - is hard to extend, like the metatheory of other type systems combining subtyping and dependent types. Soundness of important Scala features therefore remains an open problem in theory and in practice. To address some of these problems, we use a semantics...

MoSeL: A general, extensible modal framework for interactive proofs in separation logic

A number of tools have been developed for carrying out separation-logic proofs mechanically using an interactive proof assistant. One of the most advanced such tools is the Iris Proof Mode (IPM) for Coq, which offers a rich set of tactics for making separation-logic proofs look and feel like ordinary Coq proofs. However, IPM is tied to a...