20th Annual Scheme and Functional Programming Workshop, 2019

Berlin, Germany

Co-located with ICFP 2019

Important Dates

Submission deadline
June 7, 2019 (AoE)
Author notification
June 23, 2019 (AoE)
Camera-ready deadline
July 19, 2019 (AoE)
Sunday, August 18, 2019

Important Links

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.

We are excited to announce two Keynote speakers at this year's Workshop:

  • Edwin Brady is the designer of the Idris programming language and is currently working on a high-performance backend for Idris based on Scheme.
  • Andy Keep is a principal designer and developer of the Chez Scheme compiler who worked to re-implement and improve Chez using his nanopass compiler framework.

8:30--9:00 Morning Coffee
Morning Keynote by Edwin Brady
10:00--10:30 Coffee Break
10:30--12:00 Research Session 1 (Session chair: Will Byrd)
10:30--11:00 Syntax Templates In Racket (paper)
11:00--11:30 Visualizing Abstract Abstract Machines
11:30--12:00 gLua: A modern Lua transpiler in Scheme
12:00--14:00 Lunch Break
14:00--15:00 Research Session 2 (Session chair: Ryan Culpepper)
14:00--14:20 SRFI-167, SRFI-168 and the functional store
14:20--14:40 Reigniting Fuse, an Online Partial Evaluator for Scheme
14:40--15:00 Lightning talk: Commanding Emacs from Coq
15:00--15:30 Coffee Break
15:30--16:30 Research Session 3 (Session chair: Will Byrd)
15:30--16:00 Scheme Macros for Non-linear Pattern Matching with Backtracking for Non-free Data Types (paper)
16:00--16:30 Stack-Liberated Abstract Garbage Collection (paper)
16:30--17:00 Coffee Break
17:00--18:00 Afternoon Keynote by Andy Keep
19:00-21:00 Schemer's Meetup (Location: TBD)

We invite high-quality papers about novel research results, lessons learned from practical experience in an industrial or educational setting, and even new insights on old ideas. We welcome and encourage submissions that apply to any dynamic functional language, especially those that can be considered a 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, ECMAcript, 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

Please submit full papers and experience reports to our hotcrp submission page.

[NEW SINCE 2017!] Paper submissions must use the format acmart and its sub-format acmlarge. 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 change is in line with ACM conferences (such as ICFP with which we are colocated) switching from their traditional two-column formats (e.g. sigplanconf) to the above. While a two-column format with small fonts is much more practical when reading printed papers, the single-column format with large fonts is nicer to view on a computer screen, as most papers are read these days.

To encourage authors to submit their best work, we offer three tracks:
  • Full Papers, with a limit of 14 pages. Each accepted paper will be presented by its authors in a 25 minute slot including Q&A.
  • Experience Reports, with a limit of 14 pages. Each accepted report will be presented by its authors in a 25 minute slot including Q&A.
  • Lightning talks, with a limit of 192 words. 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 printed as a Technical Report at the University of Alabama, Birmingham.

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.