Write a Blog >>
ICFP 2018
Sun 23 - Sat 29 September 2018 St. Louis, Missouri, United States

Videos are available online.

The OCaml Users and Developers Workshop brings together industrial users of OCaml with academics and hackers who are working on extending the language, type system and tools. Previous editions have been colocated with ICFP 2012 in Copenhagen, ICFP 2013 in Boston, ICFP 2014 in Gothenburg, ICFP 2015 in Vancouver, ICFP 2016 in Nara, and ICFP 2017 in Oxford, following the OCaml Meetings in Paris in 2010 and 2011.

OCaml 2018 will be held on September 27th, 2018 in St. Louis, Missouri, USA, colocated with ICFP 2018.

You're viewing the program in a time zone which is different from your device's time zone - change time zone

Thu 27 Sep
Times are displayed in time zone: Guadalajara, Mexico City, Monterrey change

09:00 - 10:00: Session 1OCaml at Frisco
Chair(s): Andrew KennedyFacebook London
09:00 - 09:05
Day opening
Andrew KennedyFacebook London
09:05 - 09:35
Anil MadhavapeddyOCaml Labs, Gemma GordonUniversity of Cambridge
09:35 - 09:45
Michel Mauny, Yann Régis-GianasIRIF, University Paris Diderot and CNRS, France / INRIA PI.R2
09:45 - 09:50
Gabriel RadanneUniversity of Freiburg, Germany
10:20 - 11:00: Session 2OCaml at Frisco
Chair(s): Stephen DolanUniversity of Cambridge
10:20 - 10:40
Gabriel RadanneUniversity of Freiburg, Germany, Frédéric BourFacebook Paris
10:40 - 11:00
11:20 - 12:00: Session 3OCaml at Frisco
Chair(s): KC SivaramakrishnanUniversity of Cambridge
11:20 - 11:40
Sebastien MondetMount Sinai - Hammer Lab
11:40 - 12:00
13:30 - 14:10: Session 4OCaml at Frisco
Chair(s): Gabriel SchererINRIA Saclay
13:30 - 13:50
Frédéric BourFacebook Paris
13:50 - 14:10
David AllsoppUniversity of Cambridge
14:30 - 15:10: Session 5OCaml at Frisco
14:30 - 14:50
Hongbo ZhangIndependent, Cristiano CalcagnoFacebook, Jordan WalkeFacebook, Cheng LouFacebook, Ricky VetterFacebook
14:50 - 15:10
Link to publication
15:30 - 16:10: Session 6OCaml at Frisco
Chair(s): Andrew KennedyFacebook London
15:30 - 15:50
Charles ChamberlainUniversity of Chicago, Cyrus OmarUniversity of Chicago

Not scheduled yet

Not scheduled yet

Call for Contributions


Presentations and discussions will focus on the OCaml programming language and its community. We aim to solicit talks on all aspects related to improving the use or development of the language and its programming environment, including, for example (but not limited to):

  • compiler developments, new backends, runtime and architectures

  • practical type system improvements, such as (but not limited to) GADTs, first-class modules, generic programming, or dependent types

  • new library or application releases, and their design rationales

  • tools and infrastructure services, and their enhancements

prominent industrial or experimental uses of OCaml, or deployments in unusual situations.


The OCaml Users and Developers Workshop will be an informal meeting with no formal proceedings. The presentation material will be available online from the workshop homepage. The presentations may be recorded, and made available at a later time.

The main presentation format is a workshop talk, traditionally around 20 minutes in length, plus question time, but we also have a poster session during the workshop – this allows to present more diverse work, and gives time for discussion. The program committee will decide which presentations should be delivered as posters or talks.


To submit a presentation, please register a description of the talk (up to 4 pages long) at https://ocaml18.hotcrp.com/ providing a clear statement of what will be provided by the presentation: the problems that are addressed, the solutions or methods that are proposed.

LaTeX-produced PDFs are a common and welcome submission format. For accessibility purposes, we ask PDF submitters to also provide the sources of their submission in a textual format, such as .tex sources. Reviewers may read either the submitted PDF or the text version.

Important dates

Thursday 31st May (any time zone): Abstract submission deadline

Thursday 28th June: Author notification

Thursday 27th September 2018: OCaml Workshop

ML family workshop and post-proceedings

The ML family workshop, held on the previous day, deals with general issues of the ML-style programming and type systems, focuses on more research-oriented work that is less specific to a language in particular (OCaml). There is an overlap between the two workshops, and we have occasionally transferred presentations from one to the other in the past. The authors who feel their submission fits both workshops are encouraged to mention it at submission time and/or contact the Program Chairs.

We are planning to publish combined post-proceedings and to invite interested authors of selected presentations to expand their abstracts for inclusion.

Questions and contact

Please send any questions to the chair: Andrew Kennedy (akenn@fb.com)

R&B: towards bringing functional programming to everyday’s web programmer

Hongbo Zhang, Cristiano Calcagno, Jordan Walke, Cheng Lou, Ricky Vetter

Wall: rendering vector graphics with OCaml and OpenGL

Frédéric Bour


Kévin Le Bon, Alan Schmitt

The OCaml Platform 1.0

Anil Madhavapeddy, Gemma Gordon

OCaml on the ESP32 chip: Well Typed Lightbulbs Await

Lucas Pluvinage, Sadiq Jaffer, Anil Madhavapeddy

RFCs, all the way down!

Romain Calascibetta

The Vecosek Ecosystem

Sebastien Mondet

Abusing Format for fun and profits

Gabriel Radanne, Frédéric Bour

The OCaml Software Foundation

Michel Mauny, Yann Régis-Gianas

Winning on Windows: porting the OCaml platform

David Allsopp

This PDF is an OCaml bytecode

Gabriel Radanne

Relit: Implementing Typed Literal Macros in Reason

Charles Chamberlain, Cyrus Omar