- Haskell-Cafe - Haskell.org

Haskell language model
by Jorrit Willaert 19 Oct '22

19 Oct '22

Dear all, For my thesis, I will try to offer Haskell coding assignments for a course in a more dynamic way, where the next assignment is based on the knowledge gap of the learner. For this, I will use a neural network, which will have to process a submission of a learner. Therefore, I want to use a language model that extracts features from the submission. I was planning to use BERT in a first phase, since this model creates embeddings from a document. However, this model is not trained on any programming language, so this may turn out to be insufficient. Moreover, models such as CodeBERT are trained on source code, but only on very well known programming languages. I was wondering if someone had an idea if there already exists a language model that can create meaningful representations for Haskell. More general models such as Codex (paying API) or GPT-Code-Clippy (free and opensource) could also be tried out, but if there exists a model that has been trained on Haskell specific data, that would of course be the most beneficial option. If you want to read more about my thesis, you can read more about it in the attachment. Thanks in advance! Kind regards, Jorrit Willaert https://www.linkedin.com/in/jorrit-willaert-166a64198/ https://github.com/JorritWillaert

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What's different about quantified constraints since GHC 9.2?
by Li-yao Xia 19 Oct '22

19 Oct '22

Dear Café, There's a trick [1] involving quantified constraints (and usually type families) where a function has a quantified constraint (forall a. CF a) and which is explicitly instantiated with a well-placed type annotation (_ :: CF x => ...). Since GHC 9.2, this trick works without that type annotation. How did GHC get smarter at instantiating this quantified constraint? Below is a minimized example which compiles on GHC 9.2.1 but not 9.0.1 (haven't tested 9.0.2), unless you uncomment the last line. Cheers, Li-yao [1]: an Iceland_jack trick https://gitlab.haskell.org/ghc/ghc/-/issues/14860#note_151394 {-# LANGUAGE TypeFamilies, FlexibleInstances, FlexibleContexts, QuantifiedConstraints, ScopedTypeVariables #-} module A where type family F a class C a class C (F a) => CF a f :: C (F a) => a f = undefined g :: (forall a. CF a) => a g = f -- :: forall a. CF a => a -- needed until GHC 9.0.1 but not GHC 9.2.1 (and later)

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FOSDEM 2023 Haskell devroom proposal - co-organiser needed!
by Fraser Tweedale 19 Oct '22

19 Oct '22

Greetings, I decided to propose a Haskell devroom (like a one/half-day specialist track or miniconf) for FOSDEM 2023, to be held February 4--5 in Brussels. It would be great to promote Haskell among this audience and hopefully attract new contributors / community members. Unfortunately I left it quite late (deadline submission is today). I only just realised I need a secondary contact (i.e. co-organiser) to submit the proposal. So... any volunteers? Ideally you are located in Europe or definitely planning to attend FOSDEM. If you are willing, please reply! I think I all need right now is your name and email address (and enthusiasm). The text of my proposal may be found at https://github.com/frasertweedale/talks/blob/master/2022-02-xx-fosdem-haske…. I have experience organising and host FP miniconfs at linux.conf.au including running the CFP etc. I expect FOSDEM will be similar, except y'know, the other side of the world from Australia, where I live. Thanks, Fraser

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Package takeover request: utf8-light
by Francesco Ariis 18 Oct '22

18 Oct '22

Hello list, I would like to take over `utf8-light`: https://hackage.haskell.org/package/fgl as it currently breaks compilation for a game I wrote: https://github.com/haskell-infra/hackage-trustees/issues/347 There is no repository, I contacted the maintainer via email on october 2, without receiving any answer —F

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Call for Contributions: BOB 2023 [March 17, Deadline Nov 21]
by Stefan Wehr 18 Oct '22

18 Oct '22

================================================================================ BOB Conference 2023 "What happens when we use what's best for a change?" https://bobkonf.de/2023/cfc.html Berlin, Mar 17 Call for Contributions Deadline: November 21, 2022 ================================================================================ You are actively engaged in advanced software engineering methods, solve ambitious problem with software and are open to cutting-edge innovation? Attend this conference, meet people that share your goals, and get to know the best software tools and technologies available today. We strive to offer a day full of new experiences and impressions that you can use to immediately improve your daily life as a software developer. If you share our vision and want to contribute, submit a proposal for a talk or tutorial! NOTE: The conference fee will be waived for presenters. Travel expenses will not be covered (for exceptions see "Speaker Grants"). Online or Onsite ---------------- We expect we'll be able to hold BOB 2023 in Berlin. Note that we intend to provide a safe environment for all participants. There will be space outside to eat and chat. We may ask you to wear a mask indoors when not presenting or eating, and may also ask you to take a COVID test on-site before the event. If an on-site BOB is not possible, we'll make BOB a successful online event, like BOB 2021 and BOB 2022. Should BOB happen online, we will likely ask for pre-recorded talks to make room for questions and social interactions during the actual conference day. (Of course, we'll provide assistance making those recordings.) Tutorials will likely happen as a live-session. Shepherding ----------- The program committee offers shepherding to all speakers. Shepherding provides speakers assistance with preparing their sessions. Specifically: - advice on structure and presentation - review of talk slides - assistance with recording - review of recording, if applicable Speaker Grants -------------- BOB has Speaker Grants available to support speakers from groups under-represented in technology. We specifically seek women speakers, speakers of color, and speakers who are not able to attend the conference for financial reasons. Topics ------ We are looking for talks about best-of-breed software technology, e.g.: - functional programming - persistent data structures and databases - event-based modelling and architecture - "fancy types" (dependent types, gradual typing, linear types, ...) - formal methods for correctness and robustness - abstractions for concurrency and parallelism - metaprogramming - probabilistic programming - math and programming - controlled side effects - program synthesis - next-generation IDEs - effective abstractions for data analytics - … everything really that isn’t mainstream, but you think should be - … includeing rough ideas worth discussing. Presenters should provide the audience with information that is practically useful for software developers. Challenges ---------- Furthermore, we seek contributions on successful approaches for solving hard problems, for example: - bias in machine-learning systems - digital transformation in difficult settings - accessibiltity - systems with critical reliability requirements - ecologically sustainable software development We're especially interested in experience reports. Other topics are also relevant, e.g.: - introductory talks on technical background - overviews of a given field - demos and how-tos Requirements ------------ We accept proposals for presentations of 45 minutes (40 minutes talk + 5 minutes questions), as well as 90 minute tutorials for beginners. The language of presentation should be either English or German. Your proposal should include (in your presentation language of choice): - An abstract of max. 1500 characters. - A short bio/cv - Contact information (including at least email address) - A list of 3-5 concrete ideas of how your work can be applied in a developer's daily life - additional material (websites, blogs, slides, videos of past presentations, …) - Don't be confused: The system calls a submission event. Organisation ------------ - Direct questions to konferenz at bobkonf dot de - Proposal deadline: November 21, 2022 - Notification: December 5, 2022 - Program: December 12, 2022 Submit here: https://pretalx.com/bob-2023/submit/ Program Committee ----------------- (more information here: https://bobkonf.de/2023/programmkomitee.html) - Matthias Fischmann, Wire - Matthias Neubauer, SICK AG - Nicole Rauch, Softwareentwicklung und Entwicklungscoaching - Michael Sperber, Active Group - Stefan Wehr, Hochschule Offenburg Scientific Advisory Board - Annette Bieniusa, TU Kaiserslautern - Torsten Grust, Uni Tübingen - Peter Thiemann, Uni Freiburg

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Haskell merchandise
by Borys Kopeć 14 Oct '22

14 Oct '22

Hey all, Do you know where to find official (if there is one) merch on Haskell? I'm talking stickers, clothes and gadgets. Regards Borys

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Ph.D. position at Radboud University Nijmegen, The Netherlands
by Pieter Koopman 14 Oct '22

14 Oct '22

Dear all, we are looking for a PhD candidate in Software Technology <https://www.ru.nl/en/working-at/job-opportunities/phd-candidate-in-software…>. As a PhD candidate in the Software Technology Group, you will actively contribute to the research group's IoT activities, spearheading research on swarm computing in the IoT: intelligent cooperating nodes that are dynamically connected in an ever-changing network. You will contribute to our research in swarm computing, working with dynamically changing networks of cooperating intelligent nodes. You have a Master's degree in computer science or mathematics with a background in declarative/functional programming. Experience with code generation, run-time systems, the internet of things, edge computing, language design, or low-power computing is a plus. Please contact me for details. Pieter Koopman

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Re: [Haskell-cafe] CFP for PEPM 2023 (Deadline extended)
by Edwin Brady 14 Oct '22

14 Oct '22

Apologies, it's Tuesday 18th AoE (next week), not Tuesday 13th. Thanks to those who pointed out the error and sorry for the extra noise. From: Edwin Brady <ecb10(a)st-andrews.ac.uk> Dear all, (With apologies for any duplicate copies). Please see the CFP for PEPM 203 below. We have received some requests for extensions, and extended the deadline to next Tuesday. Note that short papers, including tool demos, works in progress and extended abstracts, are welcome too! Edwin and Jens -- CALL FOR PAPERS -- ACM SIGPLAN Workshop on PARTIAL EVALUATION AND PROGRAM MANIPULATION (PEPM) 2023 =============================================================================== * Website : https://popl23.sigplan.org/home/pepm-2023 * Time : 16th--17th January 2023 * Place : Boston, Massachusetts, United States (co-located with POPL 2023) The ACM SIGPLAN Workshop on Partial Evaluation and Program Manipulation (PEPM) has a history going back to 1991 and has been co-located with POPL every year since 2006. It originated with the discoveries of useful automated techniques for evaluating programs with only partial input. Over the years, the scope of PEPM has expanded to include a variety of research areas centred around the theme of semantics-based program manipulation — the systematic exploitation of treating programs not only as subjects to black-box execution but also as data structures that can be generated, analysed, and transformed while establishing or maintaining important semantic properties. Scope ----- In addition to the traditional PEPM topics (see below), PEPM 2023 welcomes submissions in new domains, in particular: * Semantics based and machine-learning based program synthesis and program optimisation. * Modelling, analysis, and transformation techniques for distributed and concurrent protocols and programs, such as session types, linear types, and contract specifications. More generally, topics of interest for PEPM 2023 include, but are not limited to: * Program and model manipulation techniques such as: supercompilation, partial evaluation, fusion, on-the-fly program adaptation, active libraries, program inversion, slicing, symbolic execution, refactoring, decompilation, and obfuscation. * Techniques that treat programs/models as data objects including metaprogramming, generative programming, embedded domain-specific languages, program synthesis by sketching and inductive programming, staged computation, and model-driven program generation and transformation. * Program analysis techniques that are used to drive program/model manipulation such as: abstract interpretation, termination checking, binding-time analysis, constraint solving, type systems, automated testing and test case generation. * Application of the above techniques including case studies of program manipulation in real-world (industrial, open-source) projects and software development processes, descriptions of robust tools capable of effectively handling realistic applications, benchmarking. Examples of application domains include legacy program understanding and transformation, DSL implementations, visual languages and end-user programming, scientific computing, middleware frameworks and infrastructure needed for distributed and web-based applications, embedded and resource-limited computation, and security. This list of categories is not exhaustive, and we encourage submissions describing new theories and applications related to semantics-based program manipulation in general. If you have a question as to whether a potential submission is within the scope of the workshop, please contact the programme co-chairs, Edwin Brady (ecb10(a)st-andrews.ac.uk<mailto:ecb10@st-andrews.ac.uk>) and Jens Palsberg (palsberg(a)ucla.edu<mailto:palsberg@ucla.edu>). Submission categories and guidelines ------------------------------------ Two kinds of submissions will be accepted: * Regular Research Papers should describe new results, and will be judged on originality, correctness, significance, and clarity. Regular research papers must not exceed 12 pages. * Short Papers may include tool demonstrations and presentations of exciting if not fully polished research, and of interesting academic, industrial, and open-source applications that are new or unfamiliar. Short papers must not exceed 6 pages. References and appendices are not included in page limits. Appendices may not be read by reviewers. Both kinds of submissions should be typeset using the two-column ‘sigplan’ sub-format of the new ‘acmart’ format available at: http://sigplan.org/Resources/Author/ and submitted electronically via HotCRP: https://pepm23.hotcrp.com/ Reviewing will be single-blind. Submissions are welcome from PC members (except the two co-chairs). Accepted regular research papers will appear in formal proceedings published by ACM, and be included in the ACM Digital Library. Accepted short papers do not constitute formal publications and will not appear in the proceedings. At least one author of each accepted contribution must attend the workshop (physically or virtually) and present the work. In the case of tool demonstration papers, a live demonstration of the described tool is expected. Important dates --------------- * Paper submission deadline (EXTENDED): **Tuesday 13th October 2022 (AoE)** * Author notification (EXTENDED) : **Tuesday 15th November 2022 (AoE)** * Workshop : **Monday 16th January 2023 to Tuesday 17th January 2023** Best paper award ---------------- PEPM 2023 continues the tradition of a Best Paper award. The winner will be announced at the workshop. Programme committee ------------------- * Chairs: Edwin Brady (University of St Andrews, UK) Jens Palsberg (University of California Los Angeles, USA) * Nada Amin Harvard (USA) * Adam Barwell (Imperial College London, UK) * Nicolas Biri (Input Output Global) * David Castro-Perez (University of Kent at Canterbury, UK) * Cristina David (University of Bristol, UK) * Atsushi Igarashi (Kyoto University, Japan) * Yukiyoshi Kameyama (University of Tsukuba, Japan) * Geoffrey Mainland (Drexel University, USA) * Hila Peleg (Technion Israel Institute of Technology, Israel) * Casper Bach Poulsen (Delft University of Technology, Netherlands) * Sukyoung Ryu (KAIST, Korea) * Sven-Bodo Scholz (Radboud University Nijmegen, Netherlands) * Ilya Sergey (National University of Singapore, Singapore) * Satnam Singh (Groq Inc, USA) * Elena Zucca (University of Genova, Italy)

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CFP for PEPM 2023 (Deadline extended)
by Edwin Brady 14 Oct '22

14 Oct '22

Dear all, (With apologies for any duplicate copies). Please see the CFP for PEPM 203 below. We have received some requests for extensions, and extended the deadline to next Tuesday. Note that short papers, including tool demos, works in progress and extended abstracts, are welcome too! Edwin and Jens -- CALL FOR PAPERS -- ACM SIGPLAN Workshop on PARTIAL EVALUATION AND PROGRAM MANIPULATION (PEPM) 2023 =============================================================================== * Website : https://popl23.sigplan.org/home/pepm-2023 * Time : 16th--17th January 2023 * Place : Boston, Massachusetts, United States (co-located with POPL 2023) The ACM SIGPLAN Workshop on Partial Evaluation and Program Manipulation (PEPM) has a history going back to 1991 and has been co-located with POPL every year since 2006. It originated with the discoveries of useful automated techniques for evaluating programs with only partial input. Over the years, the scope of PEPM has expanded to include a variety of research areas centred around the theme of semantics-based program manipulation — the systematic exploitation of treating programs not only as subjects to black-box execution but also as data structures that can be generated, analysed, and transformed while establishing or maintaining important semantic properties. Scope ----- In addition to the traditional PEPM topics (see below), PEPM 2023 welcomes submissions in new domains, in particular: * Semantics based and machine-learning based program synthesis and program optimisation. * Modelling, analysis, and transformation techniques for distributed and concurrent protocols and programs, such as session types, linear types, and contract specifications. More generally, topics of interest for PEPM 2023 include, but are not limited to: * Program and model manipulation techniques such as: supercompilation, partial evaluation, fusion, on-the-fly program adaptation, active libraries, program inversion, slicing, symbolic execution, refactoring, decompilation, and obfuscation. * Techniques that treat programs/models as data objects including metaprogramming, generative programming, embedded domain-specific languages, program synthesis by sketching and inductive programming, staged computation, and model-driven program generation and transformation. * Program analysis techniques that are used to drive program/model manipulation such as: abstract interpretation, termination checking, binding-time analysis, constraint solving, type systems, automated testing and test case generation. * Application of the above techniques including case studies of program manipulation in real-world (industrial, open-source) projects and software development processes, descriptions of robust tools capable of effectively handling realistic applications, benchmarking. Examples of application domains include legacy program understanding and transformation, DSL implementations, visual languages and end-user programming, scientific computing, middleware frameworks and infrastructure needed for distributed and web-based applications, embedded and resource-limited computation, and security. This list of categories is not exhaustive, and we encourage submissions describing new theories and applications related to semantics-based program manipulation in general. If you have a question as to whether a potential submission is within the scope of the workshop, please contact the programme co-chairs, Edwin Brady (ecb10(a)st-andrews.ac.uk) and Jens Palsberg (palsberg(a)ucla.edu) Submission categories and guidelines ------------------------------------ Two kinds of submissions will be accepted: * Regular Research Papers should describe new results, and will be judged on originality, correctness, significance, and clarity. Regular research papers must not exceed 12 pages. * Short Papers may include tool demonstrations and presentations of exciting if not fully polished research, and of interesting academic, industrial, and open-source applications that are new or unfamiliar. Short papers must not exceed 6 pages. References and appendices are not included in page limits. Appendices may not be read by reviewers. Both kinds of submissions should be typeset using the two-column ‘sigplan’ sub-format of the new ‘acmart’ format available at: http://sigplan.org/Resources/Author/ and submitted electronically via HotCRP: https://pepm23.hotcrp.com/ Reviewing will be single-blind. Submissions are welcome from PC members (except the two co-chairs). Accepted regular research papers will appear in formal proceedings published by ACM, and be included in the ACM Digital Library. Accepted short papers do not constitute formal publications and will not appear in the proceedings. At least one author of each accepted contribution must attend the workshop (physically or virtually) and present the work. In the case of tool demonstration papers, a live demonstration of the described tool is expected. Important dates --------------- * Paper submission deadline (EXTENDED): **Tuesday 13th October 2022 (AoE)** * Author notification (EXTENDED) : **Tuesday 15th November 2022 (AoE)** * Workshop : **Monday 16th January 2023 to Tuesday 17th January 2023** Best paper award ---------------- PEPM 2023 continues the tradition of a Best Paper award. The winner will be announced at the workshop. Programme committee ------------------- * Chairs: Edwin Brady (University of St Andrews, UK) Jens Palsberg (University of California Los Angeles, USA) * Nada Amin Harvard (USA) * Adam Barwell (Imperial College London, UK) * Nicolas Biri (Input Output Global) * David Castro-Perez (University of Kent at Canterbury, UK) * Cristina David (University of Bristol, UK) * Atsushi Igarashi (Kyoto University, Japan) * Yukiyoshi Kameyama (University of Tsukuba, Japan) * Geoffrey Mainland (Drexel University, USA) * Hila Peleg (Technion Israel Institute of Technology, Israel) * Casper Bach Poulsen (Delft University of Technology, Netherlands) * Sukyoung Ryu (KAIST, Korea) * Sven-Bodo Scholz (Radboud University Nijmegen, Netherlands) * Ilya Sergey (National University of Singapore, Singapore) * Satnam Singh (Groq Inc, USA) * Elena Zucca (University of Genova, Italy)

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SRC@POPL 2023 Call for Submissions
by Jeehoon Kang 14 Oct '22

14 Oct '22

(Apologies if you receive multiple copies of this message) -------------------------------------------------------------------------- SRC@POPL 2023 Call for Submissions ACM Student Research Competition https://popl23.sigplan.org/track/POPL-2023-student-research-competition Location: Boston, Massachusetts, USA SRC Posters: Jan 18, 2023 (tentative) SRC Presentation: Jan 20, 2023 (tentative) -------------------------------------------------------------------------- Important Dates Abstract Submission: Fri 11 Nov 2022 Notification of (Conditional) Acceptance: Fri 2 Dec 2022 Re-Submission for Conditionally Accepted Abstracts: Wed 7 Dec 2022 Notification of Final Acceptance: Fri 9 Dec 2022 -------------------------------------------------------------------------- Overview POPL 2023 will host an ACM Student Research Competition, where undergraduate and graduate students can present their original research before a panel of judges and conference attendees. This year’s competition will consist of three rounds: • Round 1, Extended abstract: All students are encouraged to submit an extended abstract outlining their research. The submission should be up to three pages using “\documentclass[acmsmall,nonacm]{acmart}”. • Round 2, Poster at POPL: Based on the abstracts, a panel of judges will select the most promising entrants to participate in a poster session at POPL. In the poster session, students will be able to interact with POPL attendees and judges. After the poster session, three finalists in each category (graduate/undergraduate) will be selected to advance to the next round. • Round 3, Oral presentation at POPL: The last round will consist of a short oral live presentation at POPL to compete for the final awards in each category. This round will also select an overall winner who will advance to the ACM SRC Grand Finals. -------------------------------------------------------------------------- Call for Submission POPL invites students to participate in the Student Research Competition in order to present their research and get feedback from prominent members of the programming language research community. Please submit your extended abstracts through HotCRP: https://popl23src.hotcrp.com Submissions must be original research that is not already published at POPL or another conference or journal. One of the goals of the SRC is to give students feedback on ongoing, unpublished work. Furthermore, the abstract must be authored solely by the student. If the work is collaborative with others and/or part of a larger group project, the abstract should make clear what the student’s role was and should focus on that portion of the work. The extended abstract should be up to three pages using ‘\documentclass[acmsmall,nonacm]{acmart}’. Reference lists do not count towards the three-page limit. You may write appendices after the three-page limit, but please be noted that the committee is not required to read them. This year, we will have two review cycles. For each submission, one of the following decisions will be made: • Accept: abstracts that proceed to the next round unconditionally. • Conditional Accept: abstracts that receive revision suggestions from the PC members. Authors will have 5 days to revise the abstract accordingly and then resubmit. The revised abstracts will then be re-evaluated, and either accepted or rejected. • Reject: abstracts that will not proceed to the next round. -------------------------------------------------------------------------- Program Committee Jeehoon Kang, KAIST Danfeng Zhang, Pennsylvania State University Youyou Cong, Tokyo Institute of Technology Zeyu Ding, Binghamton University, USA Andrew K. Hirsch, MPI-SWS Yoonseung Kim, Yale University Abhinav Verma, Pennsylvania State University Yuepeng Wang, Simon Fraser University

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