Write a Blog >>
ICFP 2020
Thu 20 - Fri 28 August 2020
Tue 25 Aug 2020 16:15 - 16:30 at ICFP NY 4 - New York 4 Chair(s): Stephanie Weirich
Wed 26 Aug 2020 04:15 - 04:30 at ICFP Asia 4 - Asia 4 Chair(s): Stephanie Weirich

It has been well known that naively combining polymorphic effects and polymorphic type assignment breaks type safety. Existing approaches to this problem are classified into two groups: one for restricting how effects are triggered and the other for restricting how they are implemented. This work explores a new approach to the safety of polymorphic effects in polymorphic type assignment. A novelty of our work lies in finding a restriction on \emph{effect interfaces}. To formalize our idea, we employ algebraic effects and handlers, where an effect interface is given by a set of operations coupled with type signatures. We propose \emph{signature restriction}, a new notion to restrict the type signatures of operations, and show that signature restriction is sufficient to ensure type safety of an effectful language equipped with unrestricted polymorphic type assignment. We also develop a type-and-effect system to enable the use of both operations that follow and do not follow signature restriction in a single program.

Tue 25 Aug
Times are displayed in time zone: Eastern Time (US & Canada) change

14:30 - 16:30
New York 4ICFP Program at ICFP NY 4
Chair(s): Stephanie WeirichUniversity of Pennsylvania

Public livestreams: YouTube, Bilibili (China)

14:30
15m
Talk
The Simple Essence of Algebraic Subtyping: Principal Type Inference with Subtyping Made Easy (Functional Pearl)
ICFP Program
DOI Pre-print Media Attached
14:45
15m
Talk
Liquid Resource Types
ICFP Program
Tristan KnothUniversity of California at San Diego, USA, Di WangCarnegie Mellon University, Adam ReynoldsUniversity of California, San Diego, Nadia PolikarpovaUniversity of California, San Diego, Jan HoffmannCarnegie Mellon University
DOI Media Attached
15:00
15m
Talk
Cosmo: A Concurrent Separation Logic for Multicore OCaml
ICFP Program
Glen MévelInria, Université Paris-Saclay, CNRS, Laboratoire de recherche en informatique, Jacques-Henri JourdanUniversersité Paris Saclay, CNRS, LRI, François PottierInria, France
DOI Media Attached
15:15
15m
Talk
Composing and Decomposing Op-Based CRDTs with Semidirect Products
ICFP Program
Matthew WeidnerCarnegie Mellon University, Christopher MeiklejohnCarnegie Mellon University, Heather MillerCarnegie Mellon University
DOI Media Attached
15:30
15m
Talk
A Quick Look at ImpredicativityDistinguished Paper
ICFP Program
Alejandro Serrano47 Degrees, Spain, Jurriaan HageUtrecht University, Netherlands, Simon Peyton JonesMicrosoft, UK, Dimitrios VytiniotisDeepMind
DOI Pre-print Media Attached
15:45
15m
Talk
A Unified View of Modalities in Type Systems
ICFP Program
Andreas AbelGothenburg University, Jean-Philippe BernardyUniversity of Gothenburg, Sweden
DOI Media Attached
16:00
15m
Talk
Lower Your Guards: A Compositional Pattern-Match Coverage Checker
ICFP Program
Sebastian GrafKarlsruhe Institute of Technology, Simon Peyton JonesMicrosoft, UK, Ryan ScottGalois, Inc.
Link to publication DOI Media Attached
16:15
15m
Talk
Signature restriction for polymorphic algebraic effects
ICFP Program
Taro SekiyamaNational Institute of Informatics, Takeshi TsukadaChiba University, Japan, Atsushi IgarashiKyoto University, Japan
DOI Media Attached

Wed 26 Aug
Times are displayed in time zone: Eastern Time (US & Canada) change

02:30 - 04:30
Asia 4ICFP Program at ICFP Asia 4
Chair(s): Stephanie WeirichUniversity of Pennsylvania

Public livestreams: YouTube, Bilibili (China)

02:30
15m
Talk
The Simple Essence of Algebraic Subtyping: Principal Type Inference with Subtyping Made Easy (Functional Pearl)
ICFP Program
DOI Pre-print Media Attached
02:45
15m
Talk
Liquid Resource Types
ICFP Program
Tristan KnothUniversity of California at San Diego, USA, Di WangCarnegie Mellon University, Adam ReynoldsUniversity of California, San Diego, Nadia PolikarpovaUniversity of California, San Diego, Jan HoffmannCarnegie Mellon University
DOI Media Attached
03:00
15m
Talk
Cosmo: A Concurrent Separation Logic for Multicore OCaml
ICFP Program
Glen MévelInria, Université Paris-Saclay, CNRS, Laboratoire de recherche en informatique, Jacques-Henri JourdanUniversersité Paris Saclay, CNRS, LRI, François PottierInria, France
DOI Media Attached
03:15
15m
Talk
Composing and Decomposing Op-Based CRDTs with Semidirect Products
ICFP Program
Matthew WeidnerCarnegie Mellon University, Christopher MeiklejohnCarnegie Mellon University, Heather MillerCarnegie Mellon University
DOI Media Attached
03:30
15m
Talk
A Quick Look at ImpredicativityDistinguished Paper
ICFP Program
Alejandro Serrano47 Degrees, Spain, Jurriaan HageUtrecht University, Netherlands, Simon Peyton JonesMicrosoft, UK, Dimitrios VytiniotisDeepMind
DOI Pre-print Media Attached
03:45
15m
Talk
A Unified View of Modalities in Type Systems
ICFP Program
Andreas AbelGothenburg University, Jean-Philippe BernardyUniversity of Gothenburg, Sweden
DOI Media Attached
04:00
15m
Talk
Lower Your Guards: A Compositional Pattern-Match Coverage Checker
ICFP Program
Sebastian GrafKarlsruhe Institute of Technology, Simon Peyton JonesMicrosoft, UK, Ryan ScottGalois, Inc.
Link to publication DOI Media Attached
04:15
15m
Talk
Signature restriction for polymorphic algebraic effects
ICFP Program
Taro SekiyamaNational Institute of Informatics, Takeshi TsukadaChiba University, Japan, Atsushi IgarashiKyoto University, Japan
DOI Media Attached