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ICFP 2020
Thu 20 - Fri 28 August 2020
Tue 25 Aug 2020 15:15 - 15:30 at ICFP NY 4 - New York 4 Chair(s): Stephanie Weirich
Wed 26 Aug 2020 03:15 - 03:30 at ICFP Asia 4 - Asia 4 Chair(s): Stephanie Weirich

Operation-based Conflict-free Replicated Data Types (CRDTs) are eventually consistent replicated data types that automatically resolve conflicts between concurrent operations. Op-based CRDTs must be designed differently for each data type, and current designs use ad-hoc techniques to handle concurrent operations that do not naturally commute. We present a new construction, the semidirect product of op-based CRDTs, which combines the operations of two CRDTs into one while handling conflicts between their concurrent operations in a uniform way. We demonstrate the construction’s utility by using it to construct novel CRDTs, as well as decomposing several existing CRDTs as semidirect products of simpler CRDTs. Although it reproduces common CRDT semantics, the semidirect product can be viewed as a restricted kind of operational transformation, thus forming a bridge between these two opposing techniques for constructing replicated data types.

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