June 2024 - Haskell-Cafe

Journal of Functional Programming - Call for PhD Abstracts
by Graham Hutton 04 Nov '24

04 Nov '24

Dear all, If you or one of your students recently completed a PhD (or Habilitation) in the area of functional programming, please submit the dissertation abstract for publication in JFP: simple process, no refereeing, open access, 200+ published to date, deadline 31st May 2024. Please share! Best wishes, Graham Hutton ============================================================ CALL FOR PHD ABSTRACTS Journal of Functional Programming Deadline: 31st May 2024 http://tinyurl.com/jfp-phd-abstracts ============================================================ PREAMBLE: Many students complete PhDs in functional programming each year. As a service to the community, twice per year the Journal of Functional Programming publishes the abstracts from PhD dissertations completed during the previous year. The abstracts are made freely available on the JFP website, i.e. not behind any paywall. They do not require any transfer of copyright, merely a license from the author. A dissertation is eligible for inclusion if parts of it have or could have appeared in JFP, that is, if it is in the general area of functional programming. The abstracts are not reviewed. Please submit dissertation abstracts according to the instructions below. We welcome submissions from both the student and the advisor/supervisor although we encourage them to coordinate. Habilitation dissertations are also eligible for inclusion. ============================================================ SUBMISSION: Please submit the following information to Graham Hutton <graham.hutton(a)nottingham.ac.uk> by 31st May 2024. o Dissertation title: (including any subtitle) o Student: (full name) o Awarding institution: (full name and country) o Date of award: (month and year; depending on the institution, this may be the date of the viva, corrections being approved, graduation ceremony, or otherwise) o Advisor/supervisor: (full names) o Dissertation URL: (please provide a permanently accessible link to the dissertation if you have one, such as to an institutional repository or other public archive; links to personal web pages should be considered a last resort) o Dissertation abstract: (plain text, maximum 350 words; you may use \emph{...} for emphasis, but we prefer no other markup or formatting; if your original abstract exceeds the word limit, please submit an abridged version within the limit) Please do not submit a copy of the dissertation itself, as this is not required. JFP reserves the right to decline to publish abstracts that are not deemed appropriate. ============================================================ PHD ABSTRACT EDITOR: Graham Hutton School of Computer Science University of Nottingham Nottingham NG8 1BB United Kingdom ============================================================ This message and any attachment are intended solely for the addressee and may contain confidential information. If you have received this message in error, please contact the sender and delete the email and attachment. Any views or opinions expressed by the author of this email do not necessarily reflect the views of the University of Nottingham. Email communications with the University of Nottingham may be monitored where permitted by law.

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Call for Talks: Haskell Implementors' Workshop 2024
by Matthew Pickering 08 Jul '24

08 Jul '24

``` ACM SIGPLAN Haskell Implementors' Workshop https://icfp24.sigplan.org/home/hiw-2024 Milan, Italy, September 2, 2024 Co-located with ICFP 2024 https://icfp24.sigplan.org/ ``` ## Important dates * Deadline: July 19, 2024 (AoE) * Notification: August 2, 2024 * Workshop: September 2, 2024 The 16th Haskell Implementors’ Workshop is to be held alongside ICFP 2024 this year in Milan. It is a forum for people involved in the design and development of Haskell implementations, tools, libraries, and supporting infrastructure to share their work and to discuss future directions and collaborations with others. Talks and/or demos are proposed by submitting an abstract, and selected by a small program committee. There will be no published proceedings. The workshop will be informal and interactive, with open spaces in the timetable and room for ad-hoc discussion, demos, and lightning talks. ## Scope and Target Audience It is important to distinguish the Haskell Implementors’ Workshop from the Haskell Symposium which is also co-located with ICFP 2024. The Haskell Symposium is for the publication of Haskell-related research. In contrast, the Haskell Implementors’ Workshop will have no proceedings – although we will aim to make talk videos, slides, and presented data available with the consent of the speakers. The Implementors’ Workshop is an ideal place to describe a Haskell extension, describe works-in-progress, demo a new Haskell-related tool, or even propose future lines of Haskell development. Members of the wider Haskell community are encouraged to attend the workshop – we need your feedback to keep the Haskell ecosystem thriving. Students working with Haskell are especially encouraged to share their work. The scope covers any of the following topics. There may be some topics that people feel we’ve missed, so by all means submit a proposal even if it doesn’t fit exactly into one of these buckets: * Compilation techniques * Language features and extensions * Type system implementation * Concurrency and parallelism: language design and implementation * Performance, optimization and benchmarking * Virtual machines and run-time systems * Libraries and tools for development or deployment ## Talks We invite proposals from potential speakers for talks and demonstrations. We are aiming for 20-minute talks with 5 minutes for questions and changeovers. We want to hear from people writing compilers, tools, or libraries, people with cool ideas for directions in which we should take the platform, proposals for new features to be implemented, and half-baked crazy ideas. Please submit a talk title and abstract of no more than 300 words. Submissions can be made via HotCRP at https://hiw2024.hotcrp.com until July 19 (anywhere on earth). We will also have a lightning talks session. These have been very well received in recent years, and we aim to increase the time available to them. Lightning talks should be ~7mins and are scheduled on the day of the workshop. Suggested topics for lightning talks are to present a single idea, a work-in-progress project, a problem to intrigue and perplex Haskell implementors, or simply to ask for feedback and collaborators. ## Program Committee * Matthew Pickering (Well-Typed LLP) * David Binder (University of Tübingen) * Gabriella Gonzalez (Mercury) * Sylvain Henry (IOG) * Teofil Camarasu (Tracsis) ## Contact * Matthew Pickering

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[ANN] cabal-install-3.12.1.0 (and accompanying libraries) released
by Artem Pelenitsyn 06 Jul '24

06 Jul '24

Dear all, The cabal release team brings you the release of the cabal-install tool, version 3.12.1.0. This is the first release of the tool in the 3.12 series, and, hence, the first cabal-install supporting Cabal 3.12 packaged with GHC 9.10.1. We also update the three main libraries. - cabal-install: The command-line interface for Cabal and Hackage. <https://hackage.haskell.org/package/cabal-install-3.12.1.0> - Cabal: A framework for packaging Haskell software <https://hackage.haskell.org/package/Cabal-3.12.1.0> - Cabal-syntax: A library for working with .cabal files <https://hackage.haskell.org/package/Cabal-syntax-3.12.1.0> - cabal-install-solver: The command-line interface for Cabal and Hackage. <https://hackage.haskell.org/package/cabal-install-solver-3.12.1.0> The binaries for cabal-install are available on our website <https://downloads.haskell.org/cabal/cabal-install-3.12.1.0/> and can be installed via GHCup manually, e.g.: - Linux x86_64 (static, alpine3_18): ghcup --no-cache install cabal -u 'https://downloads.haskell.org/cabal/cabal-install-3.12.1.0/cabal-install-3.…' 3.12.1.0 - MacOS AArch64: ghcup --no-cache install cabal -u 'https://downloads.haskell.org/cabal/cabal-install-3.12.1.0/cabal-install-3.…' 3.12.1.0 - Windows: ghcup --no-cache install cabal -u 'https://downloads.haskell.org/cabal/cabal-install-3.12.1.0/cabal-install-3.…' 3.12.1.0 - or a similar command for your platform using the binaries provided on the website - as usual, cabal update && cabal install cabal-install-3.12.1.0 is an option too. We expect the official GHCup channel to be updated with the 3.12.1.0 binaries soon. <https://discourse.haskell.org/t/cabal-install-3-12-1-0-and-accompanying-lib…>What is new *Performance* - Significant speedups during cabal startup due to use of the latest tar *Project Organization* - Support for asm, cmm, and js sources in executable components - Support for per-component builds when coverage is enabled - Haskell files in explicit source directories take precedence over autogenerated Haskell files - Fix precedence for PATH for build-tools-depends (executables from PATH don’t shadow executables from build-tool-depends anymore) *UX* - Errors now have error codes, which will be documented on https://errors.haskell.org - A new subcommand, cabal path, which can be used to get information about the paths cabal will use within a project - Support for authentication tokens for uploading to Hackage - --(test-)show-details=direct is now the default - Shorten solver rejection messages by removing repetition - Show provenance of project constraints *Interaction with GHC* - Support for loading multiple components into one repl session - Support for the --semaphore flag to enable interaction with GHC Job Server protocol - Support for GHC2024 - Support for language extensions ExtendedLiterals¸ ListTuplePuns, and TypeAbstractions *Other Compilers* - Micro Haskell (MHS) has been added as a known compiler. We don’t have support for driving it yet, though. See the release notes <https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.…> for more details and other changes. <https://discourse.haskell.org/t/cabal-install-3-12-1-0-and-accompanying-lib…> Contributors 50^2, Adam Gundry, Andrea Bedini, Andreas Abel, Andreas Klebinger, Arjun Kathuria, Artem Pelenitsyn, BasLaa, Bas Laarakker, Ben Gamari, Bodigrim, Brandon Chinn, brandon s allbery kf8nh, Bryan Richter, Colton Clemmer, Csaba Hruska, cydparser, Daniel Trstenjak, David Binder, David Christiansen, Edwin Marshall, Elodie Lander, Erik de Castro Lopo, Felix Yan, fendor, Finley, Francesco Ariis, Francesco Gazzetta, Fraser Tweedale, Gershom Bazerman, Hamish Mackenzie, Hécate Moonlight, Ikko Eltociear Ashimine, Jana Chadt, Javier Sagredo, Jean-Paul Calderone, Jens Petersen, Jessica Hamilton, John Paul Adrian Glaubitz, Josh Meredith, Julia Longtin, Julian Ospald, Kazuki Okamoto, Kristen Kozak, Krzysztof Gogolewski, liamzee, Liisi Kerik, Lin Runze, Malte Neuss, malteneuss, Marcin Szamotulski, Matthew Pickering, Mel Zuser, Michael Peyton Jones, Mike Pilgrem, Mikolaj Konarski, mixphix, Oleg Grenrus, Ondřej Šebek, Patrick Augusto, Patrick Dougherty, Peter Becich, Phil de Joux, Pierre Le Marre, Rebecca Turner, Rodrigo Mesquita, Ryan Scott, Samuel Thibault, Sander, Sebastian Tee, Sergey Vinokurov, Shae Erisson, sheaf, Simon Hengel, Siyuan Chen, Sören Tempel, SuganyaAK, Suganya Raju, Sylvain Henry, Taylor Fausak, Teo Camarasu, Tom Ellis, tomjaguarpaw, Tommy Bidne, Tom Smeding, Torsten Schmits, Tristan Cacqueray, Troels Henriksen, Wismill, Yvan Sraka, Zoe Zuser We thank all contributors as well as our reviewers, QA testers, devops, and others without whom this release wouldn’t be possible. <https://discourse.haskell.org/t/cabal-install-3-12-1-0-and-accompanying-lib…> Feedback Please, report any issues you notice with the 3.12.1.0 release on our GitHub: https://github.com/haskell/cabal — cabal release team (Artem, Brandon, Francesco, Gershom, Hécate, Mikołaj)

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ICFP 2024: Call fo Volunteers
by ICFP Publicity 26 Jun '24

26 Jun '24

ICFP 2024: CALL FOR VOLUNTEERS Sign up to be a Volunteer and help us make ICFP 2024 a unique experience for all attendants! ICFP 2024 is pleased to offer a number of opportunities for volunteers, who are vital to the efficient operation and continued success of the conference each year. The volunteer program is a chance for people from around the world to participate in the conferences whilst assisting us in preparing and running the event. The Volunteer Program helps more people attend the ICFP conference by covering conference fees, including access to the banquet (but not travel or lodging expenses) in exchange for a fixed number of work hours (usually from 12 to 15) helping with the conference organization. How to apply: Please apply using this form: https://forms.gle/688UyUSRTfSGSCGF9 The deadline is *July 15th*. Eligibility: Everyone is welcome to apply. Priority is given to junior members of our community, e.g. full- or part-time students of computer science and related fields. Expectations: Applicants must be available for at least four (4) full days between September 2th and September 7th, 2024, and will be expected to provide a total of 12-15 hours of volunteering work in that time. The skills, talents, and dedication of our Volunteers contribute to the overall quality of the conference. The Volunteer role this year will mainly involve working with the organizers to prepare for the conference by providing technical assistance to attendees, managing online Q&A and poster sessions, and supporting active communication in our online environment. Compensation: * A Complimentary Conference Registration, offering access to all open sessions (i.e., parallel paper presentations, demonstrations, and workshops) and conference proceedings. * Free lunches and refreshments during breaks. * Volunteer garments. * Free admission to all social events. Please note that volunteers are responsible for their own travel and accommodation arrangements. If you need additional travel funding, please consider SIGPLAN PAC Funding and PLMW: * https://www.sigplan.org/PAC/ * https://icfp24.sigplan.org/home/PLMW-ICFP-2024

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[Call for Participation]: Haskell Certification Program
by Jose Calderon 25 Jun '24

25 Jun '24

Serokell and the Haskell Foundation are excited to announce a community-led Haskell Certification Program (https://certification.haskell.foundation/) Serokell has developed an online testing platform for administering practical and theoretical Haskell problems. Haskell is a complex language, offering a wide range of techniques and features for programmers. It’s simply not feasible for a novice or intermediate programmer to master them all. The goal of the Haskell certification is to help standardize what it means to ‘know Haskell’ at various levels of experience. As a community driven effort, we are soliciting self-nomination for volunteers to take part in the organization and decision-making around the certification process. These volunteers will help determine how the certification process evolves and which questions are relevant to the various experience levels of a Haskell programmer. Volunteers from organizations that use Haskell professionally are especially welcome. Please send your self-nomination to certification(a)haskell.foundation by the end of July 10th 2024. Best wishes, Jose Calderon

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SPLASH'24: Call for Volunteers
by Umar Farooq 24 Jun '24

24 Jun '24

======================================================================== Call for Volunteers The ACM Conference on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'24) October 20-25, 2024, Pasadena, California, United States https://2024.splashcon.org/track/splash-2024-Volunteers ======================================================================== ### Important dates Volunteer applications Deadline: Tue Jul 30, 2024 Notification of Acceptance: Wed Aug 7, 2024 Apply to be a Volunteer and help us make SPLASH 2024 a great experience for all attendants! SPLASH 2024 is pleased to offer a number of opportunities for volunteers, who are vital to the efficient operation and continued success of the conference each year. The volunteer program is a chance for students and Programming Languages researchers aspirants from around the world to participate in the conferences while assisting us in preparing and running the event. The Volunteer Program helps more people attend the SPLASH conference by covering conference fees, including access to the banquet (but not travel or lodging expenses), in exchange for a fixed number of work hours (usually from 12 to 15) helping with the conference organization. ### Eligibility criteria Everyone is welcome to apply. Priority is given to junior members of our community, e.g. full- or part-time students of computer science and related fields. ### Duration Applicants must be available for at least five (5) full days between October 20th and October 25th 2024, and will be expected to provide 12-15 hours of volunteering work in that time. Volunteers may also be expected to be available for some amount of pre-conference discussion and training if necessary. Volunteers from all timezones are welcome. ### About Volunteering The skills, talents, and dedication of our Volunteers contribute to the overall quality of the conference. The Volunteer role this year will mainly involve working with the organizers to prepare for the conference by providing technical assistance to attendees, managing online Q&A and poster sessions, and supporting active communication in our online environment. Volunteering allows you to meet other people (faculty and students) in the Programming Languages (PL) Community. With several opportunities for networking, you can share ideas about your research, find topics you are passionate about, investigate career paths, and even find your future collaborators! ### Compensation - A Complimentary Conference Registration, offering access to all open sessions (i.e., parallel paper presentations, demonstrations, and workshops) and conference proceedings. - Free lunches and refreshments during breaks. - Volunteer shirt. - Free admission to all social events.

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PLMW@ICFP'24: Final call for Participation (travel funding application by June 21)
by Ningning Xie 17 Jun '24

17 Jun '24

APPLICATION FOR PLMW TRAVEL FUNDING For full consideration for scholarship funding, please apply at the link below by June 21, AoE. We will notify accepted attendees in a rolling fashion until all funding is committed. The application can be accessed at the following URL (Apply by June 21, 2024 AOE for full consideration!): https://forms.gle/vC6udnMWRvvAczPR6 —-------------------------------------------------------------- ACM SIGPLAN Programming Languages Mentoring Workshop (PLMW) at ICFP 24, Milan, Italy Workshop: Monday, September 2, 2024 Website: https://icfp24.sigplan.org/home/PLMW-ICFP-2024 PLMW is a workshop co-located with ICFP 2024 (the International Conference on Functional Programming) in Milan, Italy, from September 2-7. The purpose of this mentoring workshop is to encourage graduate students and senior undergraduate students to pursue careers in programming language research. This workshop will bring together world leaders in programming languages research and teaching from academia and industry to help students imagine how they might contribute to our research community. Topics will range from the abstract (e.g., what is PL research and how does one become involved in it) to the concrete (e.g., how to navigate an academic conference, how to pick a research area) as well as technical talks on cutting-edge topics. We especially encourage women and underrepresented minority students, and people with disabilities to attend PLMW. This workshop is part of the activities surrounding ICFP, and takes place the day before the main conference. One goal of the workshop is to make the ICFP conference more accessible to newcomers. We hope that participants will stay through the entire conference. Note that ICFP and PLMW are planned to be largely in-person events. While we recognize that travel to conferences is not easy for everyone, we do hope you will be able to join us in person to get the most out of the conference and its community-building aspects. A number of sponsors have generously donated scholarship funds for qualified students to attend PLMW. These scholarships can cover expenses (airfare, hotel, and registration fees) for attendance at both the workshop and the ICFP conference. Students attending this year will get one year free student membership of SIGPLAN, unless they prefer to opt out during their application. The workshop registration is open to all. Students with alternative sources of funding are welcome as well.

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[ANN] csound-expression-5.4.4 - music and sound design framework
by Anton Kholomiov 16 Jun '24

16 Jun '24

I'd like to announce a new release of [csound-expression]( https://github.com/spell-music/csound-expression) on [hackage]( https://hackage.haskell.org/package/csound-expression) The CE is a music framework for haskell with focus on ease of use and feature rich as it rides on top of the powerful audio programming language Csound. It is a DSL to build Csound programs. So the library embeds Csound in Haskell. It's a bug fix release. Many algorithms in the low-level renderer csound-expression-dynamic were rewritten and fixed. In the previous version unfortunately there were severe bugs in effectful expressions and in if-then-else blocks. But now they are fixed. Also I've updated the library to include new Csound opcodes (audio processing units from 6.18 version). Happy music making with Haskell! About the future of the csound-expression: I've started the implementation of a more tiny csound-core package. It offers a missing layer of low-level building of type-safe Csound expressions. In the previous version I've created lots of abstractions to make music making more pleasant for FP style. But this layering makes it kind of hard to debug rendered code. So I'd like to create a tiny imperative style core that will allow me to debug produced Csound code. And the rest of the code should be expressed in terms of this library. I'm not there yet. I've built the core library and it turned out very well. But now I need to rewrite FP abstractions on top of it. I'm not there yet. But I hope that gradually I will make it. Also I plan to deprecate GUI features as FLTK was deprecated in Csound and it's not packaged with Csound anymore. I think maybe it would be better to substitute them with JS+OSC. github: https://github.com/spell-music/csound-expression hackage: https://hackage.haskell.org/package/csound-expression

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Datakind and instance
by PICCA Frederic-Emmanuel 14 Jun '24

14 Jun '24

Hello, I have a class class HasIniConfig where getConfig ... a kind using DataKind data ProjectionType = TypeA | TypeB ... I would like to create instance for each 'TypeX But when I try to write an instance I get this error src/Hkl/Binoculars/Projections/QCustom.hs:195:23: error: • Expected a type, but ‘'QCustomProjection’ has kind ‘ProjectionType’ • In the first argument of ‘HasIniConfig’, namely ‘'QCustomProjection’ In the instance declaration for ‘HasIniConfig 'QCustomProjection’ | 195 | instance HasIniConfig 'QCustomProjection where | ^^^^^^^^^^^^^^^^^^ I should add class HasIniConfig (a :: ProjectionType) where But in that cas I can not create instance for other type, and I need to :) I would be glade if someone could explain how to all this. Thanks Frederic

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POPL 2025: Call for Workshops and Co-located Events
by Ningning Xie 13 Jun '24

13 Jun '24

CALL FOR WORKSHOPS AND CO-LOCATED EVENTS POPL 2025 52nd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Sun 19 - Sat 25, January 2025 Denver, Colorado, United States https://popl25.sigplan.org The 52nd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL 2025) will be held in Denver, Colorado, United States. POPL provides a forum for the discussion of fundamental principles and important innovations in the design, definition, analysis, transformation, implementation and verification of programming languages, programming systems, and programming abstractions. Events focusing on experimental and theoretical topics are welcome. Proposals are invited for workshops and other events to be co-located with POPL 2025. All co-located events are sponsored by SIGPLAN ( http://acm.org/sigplan/) Workshops should be more informal and focused than POPL itself, and include sessions that enable interaction among the workshop attendees. The preference is for one-day workshops, but other schedules can also be considered. --------------------------------------------------------------------- Submission details Deadline for submission: 26 July 2024 Notification of acceptance: 2 August 2024 A workshop proposal should provide the following information: * Name of the workshop. * Duration of the workshop. * Whether the workshop will be Conference-approved or SIGPLAN-approved (see below). * Organizers: names, affiliation, contact information, brief (100 words) biography. * A short description (150-200 words) of the topic. * Event format: workshop; type of submissions if any; review process; results dissemination. * Expected attendance and target audience. * Potential PC members - please do not contact them before the workshop is approved. * History of the workshop. * Plans for remote participation Proposals must be submitted in PDF form by email with the subject POPL 2025 Workshop Proposal: [workshop name], to the workshop co-chairs: Christoph Matheja (chmat(a)dtu.dk) and Robert Rand (rand(a)uchicago.edu) --------------------------------------------------------------------- SIGPLAN Sponsorship POPL co-located events are sponsored by SIGPLAN (http://sigplan.org/) There are two kinds of co-located events: Conference-approved (no proceedings) and SIGPLAN-approved (proceedings in the ACM Digital Library). See http://www.sigplan.org/Resources/Guidelines/Workshops/ for more information, including a full listing of prescriptions for Conference-approved and SIGPLAN-approved workshops. SIGPLAN-approved workshops must respect the SIGPLAN Diversity Policy. Proposals for SIGPLAN-approved workshops must additionally include the gender, country of affiliation, and professional status of potential PC members. See https://www.sigplan.org/Resources/Policies/Diversity/ for more details. --------------------------------------------------------------------- Selection committee All submissions will be evaluated by a committee comprising the workshops co-chairs, the general chair, and the program chair. --------------------------------------------------------------------- Further information Any questions regarding POPL 2025 co-located event proposals should be addressed to the workshops chairs Christoph Matheja (chmat(a)dtu.dk) and Robert Rand (rand(a)uchicago.edu)

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