ICFP 2021
Sun 22 - Sat 28 August 2021

The Scheme and Functional Programming Workshop is a yearly meeting of programming language practitioners who share an aesthetic sense embodied by the Algorithmic Language Scheme: universality through minimalism, and flexibility through rigorous design.

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Fri 27 Aug

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20:00 - 21:30
Session AScheme at Scheme
Is Space-Efficient Polymorphic Gradual Typing Possible?
Shota Ozaki , Taro Sekiyama National Institute of Informatics, Atsushi Igarashi Kyoto University, Japan
Design with Blocks, Code in Text (Lightning Talk)
Junya Nose Tokyo Institute of Technology, Youyou Cong Tokyo Institute of Technology, Hidehiko Masuhara Tokyo Institute of Technology
GRASP: A GRAphical Scheme Programming environment (Lightning Talk)
22:00 - 23:30
Golden Hour Session (Invited Talk)Scheme at Scheme
Scheme as a framework for Deep Learning (Invited Talk)
Jeffrey Mark Siskind Elmore Family School of Electrical and Computer Engineering, Purdue University
23:30 - 01:00
Session BScheme at Scheme
Adding AD to Scheme by Differentiating the Interpreter
Mehrdad Maleki Mastercard Labs, Barak A. Pearlmutter Maynooth University, Jeffrey Mark Siskind Elmore Family School of Electrical and Computer Engineering, Purdue University
A lightweight approach for accessing Python modules from Gambit Scheme (Lightning Talk)
Marc-André Bélanger Université de Montréal, Marc Feeley Université de Montréal
Graphite: A Library for Data Visualization (Lightning Talk)
Hazel Levine Indiana University, Sam Tobin-Hochstadt Indiana University

Sat 28 Aug

Displayed time zone: Seoul change

01:30 - 03:00
Session CScheme at Scheme
Scheduling Musical Events in Max/MSP with Scheme For Max
Iain Duncan University of Victoria
So You Want To Analyze Scheme Programs With Datalog?
Davis Silverman Syracuse University, USA, Yihao Sun Syracuse University, Kristopher Micinski Syracuse University, Thomas Gilray University of Alabama at Birmingham
Prototypes: Object-Orientation, Functionally
François-René Rideau Mutual Knowledge Systems, Inc., Alex Knauth Mutual Knowledge Systems, Inc., Nada Amin Harvard University

Call for Papers

The 2021 Scheme and Functional Programming Workshop is calling for submissions.

We invite high-quality papers about novel research results, lessons learned from practical experience in industrial or educational setting, and even new insights on old ideas. We welcome and encourage submissions that apply to any language that can be considered Scheme: from strict subsets of RnRS to other “Scheme” implementations, to Racket, to Lisp dialects including Clojure, Emacs Lisp, Common Lisp, to functional languages with continuations and/or macros (or extended to have them) such as Dylan, ECMAScript, Hop, Lua, Scala, Rust, etc. The elegance of the paper and the relevance of its topic to the interests of Schemers will matter more than the surface syntax of the examples used. Topics of interest include (but are not limited to):

  • Interaction: program-development environments, debugging, testing, refactoring
  • Implementation: interpreters, compilers, tools, garbage collectors, benchmarks
  • Extension: macros, hygiene, domain-specific languages, reflection, and how such extension affects interaction.
  • Expression: control, modularity, ad hoc and parametric polymorphism, types, aspects, ownership models, concurrency, distribution, parallelism, non-determinism, probabilism, and other programming paradigms
  • Integration: build tools, deployment, interoperation with other languages and systems
  • Formal semantics: Theory, analyses and transformations, partial evaluation
  • Human Factors: Past, present and future history, evolution and sociology of the language Scheme, its standard and its dialects
  • Education: approaches, experiences, curricula
  • Applications: industrial uses of Scheme
  • Scheme pearls: elegant, instructive uses of Scheme

Important dates

  • Updated: Submission deadline has been extended to 3 July 2021.
  • Updated: Authors will be notified by 19 July 2021.
  • Camera-ready versions are due 21 July 2021.
  • All deadlines are (23:59 UTC-12), “Anywhere on Earth”.
  • Workshop will be held online 27 August 2021

Submission Information

Paper submissions must use the format acmart and its sub-format sigplan acmsmall (note the change from last year). They must be in PDF, printable in black and white on US Letter size. Microsoft Word and LaTeX templates for this format are available at:


This format is in line with ACM conferences (such as ICFP with which we are colocated). It is recommended to use the review option when submitting a paper; this option enables line numbers for easy reference in reviews.

We want to encourage all kinds of submissions, including full papers, experience reports and lightning talks. Papers and experience reports are expected to be 10–24 pages in length using the single-column SIGPLAN acmart style. (For reference, this is about 5–12 pages of the older SIGPLAN 2-column 9pt style.) Abstracts submitted for lightning talks should be limited to 192 words. Each accepted paper and report will be presented by its authors in a 25 minute slot including Q&A. Each accepted lightning talk will be presented by its authors in a 5 minute slot, followed by 5 minutes of Q&A.

The size limits above exclude references and any optional appendices. There are no size limits on appendices, but the papers should stand without the need to read them, and reviewers are not required to read them.

Authors are encouraged to publish any code associated to their papers under an open source license, so that reviewers may try the code and verify the claims.

Proceedings will be published as a Technical Report at Northeastern University and uploaded to arXiv.org.

Publication of a paper at this workshop is not intended to replace conference or journal publication, and does not preclude re-publication of a more complete or finished version of the paper at some later conference or in a journal.

Reviewing Process

Scheme 2021 will use lightweight-double-blind reviewing. Submitted papers must omit author names and institutions and reference the authors’ own related work in the third person (e.g., not “we build on our previous work…” but rather “we build on the work of…”).

The purpose is to help the reviewers come to an initial judgement about the paper without bias, not to make it impossible for them to discover the authors if they were to try. Nothing should be done in the name of anonymity that weakens the submission or makes the job of reviewing the paper more difficult (e.g., important background references should not be omitted or anonymized).

Formatting Information

  • Full papers and experience reports should use the sigplan acmsmall option to acmart.
  • Lightning talks can be submitted as either a text file or a PDF file.
  • It is recommended to use the anonymous and review options to acmart when submitting a paper; these options hide the author names and enable line numbers for easy reference in review.

Submission Link

We will post the submission link closer to the deadline.

Questions? Use the Scheme contact form.