- Haskell-Cafe - Haskell.org

KSF Media Ab hiring Senior Developer in Helsinki, Finland (repost)
by Kari Pahula 24 Feb '23

24 Feb '23

This was posted already once in November: https://mail.haskell.org/pipermail/haskell-cafe/2022-November/135687.html We got a second open position. KSF Media is Finland’s largest Swedish language news media group. Our products include Hufvudstadsbladet, Västra Nyland, Östnyland and HBL Junior. KSF Media’s digital products are growing fast and our focus is in digital subscription sales and product development. We are now looking for a new member to join our digital development team to create outstanding news media products for our readers. We are a small but capable team with a lean way of working and passion to learn new things every day. Our way of working • Kanban • Pair Programming, Code Reviews • Git, CI/CD (multiple deployments a day), Trunk Based Development • Working in the open. Our whole frontend is open source: https://github.com/KSF-Media/affresco and https://github.com/KSF-Media/mosaico Our stack • Most new developments happen in Haskell, PureScript and Javascript • Cloud Infrastructure as Code (Google Cloud, Kubernetes, Terraform) • Microservices environment with REST APIs What we expect from you is some relevant work experience and • English language. Swedish or Finnish knowledge is a plus • Knowledge of the principles behind the modern Web stack: things like MVC, Relational Databases and Testing • High motivation, self-steering, willingness to learn and dive into things, good social skills and good sense of humour • Interest in functional programming, news media and making the world a better place • Awareness of some UX principles, API design (and optionally UI design) and empathy for the users of your code • This job opportunity requires the successful candidate to relocate to Finland and offers a hybrid work arrangement, combining remote work and on-site presence. What we can offer • Competitive salary and benefits • The best co-workers • Office in the most central location in Helsinki • Flexible terms, with possibility to remote working Interested? Please apply via LinkedIn <https://www.linkedin.com/jobs/view/3498430755> or drop a line at antti.haarala(a)ksfmedia.fi no later than on the 10th of March.

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Status of ghcup?
by Dominick Samperi 23 Feb '23

23 Feb '23

I watched an interesting YouTube video explaining how to install and use the Haskell extension in VS code, but the information appears to be obsolete, because there is no mention of ghcup, and ghcup is now required, along with a new version of the Haskell extension (the old one is labeled "legacy"). Unfortunately, I could not install ghcup on Windows due to obscure PowerShell security issues, or missing libraries in MSYS. While wrestling with this problem I discovered that Unix tools from Rtools must not be in PATH while working with Stack, probably due to incompatible MSYS versions. But removing Rtools from PATH does not resolve the ghcup installation problems. Any tips on ghcup installation under Windows would be appreciated. Thanks, Dominick

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CfP - HLPP'2023 High-Level Parallel Programming and Applications
by VIRGINIA NICULESCU 23 Feb '23

23 Feb '23

[Apologies if you receive multiple copies of this CFP] CALL FOR PAPERS >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> HLPP 2023 16th International Symposium on International Symposium on High-Level Parallel Programming and Applications Cluj-Napoca, Romania June 29-30, 2023 https://www.cs.ubbcluj.ro/hlpp2023 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Important Dates * Abstract submission: April 3, 2023 * Paper submission: April 7, 2023 * Notification: May 15, 2023 * Draft proceedings version: June 9, 2023 * Conference: June 29-30, 2023 * Journal paper submission: September 2023 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Aims and Scope As processor and system manufacturers adjust their roadmaps towards increasing levels of both inter and intra-chip parallelism, so the urgency of reorienting the mainstream software industry towards these architectures grows. At present, popular parallel and distributed programming methodologies are dominated by low-level techniques such as send/receive message passing, or equivalently unstructured shared memory mechanisms. Higher-level, structured approaches offer many possible advantages and have a key role to play in the scalable exploitation of ubiquitous parallelism. HLPP symposia provide a forum for discussion and research about such high-level approaches to parallel and distributed programming. Topics HLPP 2023 invites papers on all topics in high-level parallel programming, its tools and applications including, but not limited to, the following aspects: * High-level parallel programming and performance models (e.g. BSP, CGM, LogP, MPM, etc.) and tools * Declarative parallel and distributed programming methodologies based on functional, logical, data-flow, actor, and other paradigms * Algorithmic skeletons, patterns, etc. and constructive methods * High-level parallelism in programming languages and libraries (e.g, OCaml, Haskell, Scala, C++, etc.): semantics and implementation * Verification of declarative parallel and distributed programs * Efficient code generation, auto-tuning, and optimization for parallel and distributed programs * Model-driven software engineering for parallel and distributed systems * Domain-specific languages: design, implementation, and applications * High-level programming models for heterogeneous/hierarchical platforms with accelerators, e.g., GPU, Many-core, DSP, VPU, FPGA, etc. * High-level parallel methods for large structured and semi-structured datasets * Applications of parallel and distributed systems using high-level languages and tools * Teaching experience with high-level tools and methods for parallel and distributed computing Past HLPP Symposia: https://hlpp.eu<https://hlpp.eu/> Submission Papers submitted to HLPP 2023 must describe original research results and must not have been published or simultaneously submitted anywhere else. As it is traditional for HLPP symposia, the accepted papers will be distributed at the symposium in draft proceedings, and then the papers will be published in the special issue of an international journal (the name of the journal is to be confirmed). In the past years, the journals were the International Journal of Parallel Programming and The Journal of Supercomputing. Each paper will receive a minimum of three reviews by members of the international technical program committee. Papers will be selected based on their originality, relevance, technical clarity, and quality of presentation. Manuscripts must be prepared with the Springer IJSS latex macro package using the single column option (\documentclass[smallextended]{svjour3}) and submitted via the EasyChair Conference Management System as one pdf file. The strict page limit for initial submission and camera-ready version is 20 pages in the aforementioned format. At least one author of each accepted paper must register for the HLPP 2023 symposium and present the paper. After the symposium the authors of the papers will have ample time to revise their papers and to incorporate both reviewer feedback and presentation feedback from the whole audience during the symposium. Organization * Virginia Niculescu, “Babeş-Bolyai” University of Cluj-Napoca, Romania * Adrian Sterca, “Babeş-Bolyai” University of Cluj-Napoca, Romania * Darius Bufnea, “Babeş-Bolyai” University of Cluj-Napoca, Romania Steering Committee * Gaétan Hains (Université Paris-Est Créteil, France) * Clemens Grelck (Universiteit van Amsterdam, Netherlands) * Kiminori Matsuzaki (Kochi University of Technology, Japan) * Christoph W. Kessler (Linköping University, Sweden) * Herbert Kuchen (University of Münster, Germany) * Marco Danelutto (University of Pisa, Italy) * Ines Dutra (University of Porto, Portugal) * Arturo Gonzalez-Escribano (Universidad de Valladolid, Spain) * Frédéric Dabrowski, Université d'Orléans, France) * Virginia Niculescu (“Babes-Bolyai” University, Romania) We are looking forward to your submissions and to seeing you in Cluj-Napoca, Romania in June 2022. Best regards, Virginia Niculescu ---------------------------------------------- Dr. Virginia Niculescu Faculty of Mathematics and Computer Science "Babes-Bolyai" University E-mail: virginia.niculescu(a)ubbcluj.ro, vniculescu(a)cs.ubbcluj.ro<mailto:vniculescu@cs.ubbcluj.ro> Web: http://www.cs.ubbcluj.ro/~vniculescu DISCLAIMER Prezentul mesaj ?i orice documente ata?ate pot con?ine informa?ii confiden?iale sau sensibile care apar?in Universită?ii Babe?-Bolyai din Cluj-Napoca. 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De asemenea, nu putem garanta integritatea mesajului ?i nici că acesta este lipsit de viru?i, interceptări sau interferen?e de orice natură. ================= The contents of this email message and any attachments may contain confidential and/or privileged information belonging to Babe?-Bolyai University of Cluj-Napoca. This information is intended solely for the addressee, natural or legal person, and is legally protected from disclosure and may not be used by anyone other than the intended recipient. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments. 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Attoparsec.ByteString.Char8 or Attoparsec.ByteString for diff output?
by Pedro B. 21 Feb '23

21 Feb '23

Dear Listers, I am developing a program to parse dif output taken from stdin (as in diff file1 file2 | myApp) or from a file. I am reading the input as ByteString in either case and I am parsing it Attoparsec. My question is, Should I use Data.Attoparsec.ByteString.Char8 or Data.Attoparsec.ByteString? So far, I've been using Data.Attoparsec.ByteString.Char8 and it works for my sample files, which are in utf8 or, latin1, or the default Windows encoding. What do you suggest? Note: I sent this question previously to the beginners list, but someone suggested to me privately to send it to this list. Regards, Pedro Borges

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Re: [Haskell-cafe] Takeover request: Haskell CSS Syntax
by Olaf Klinke 18 Feb '23

18 Feb '23

Adrian, you probably know this, but: (1) Instead of a takeover, you could ask Tomas Carnecky to become merely a co-maintainer on hackage which would put you in power to sync the github and hackage versions. (2) At least with stack you can specify a github fork as dependency of your project. It is not nice, but I was forced to do the same when a repo owner ignored my pull request. For example # cabal file. # Note: xls-0.1.3 is the latest hackage version build-depends: xls >= 0.1.4 # stack.yaml extra-deps: - git: https://github.com/olafklinke/xls.git commit: 4e7a2ba639cc72678e4e40a06afd3c481d63f2e3 In your case, though, 0.1.0.0 is the package number on hackage as well as in the more up-to-date githup repo, so I don't know how the resolver would figure out which to use. Safer would be to fork and increment the cabal package version number, then proceed as above. You can later simply delete the entry in stack.yaml when your fork has been merged into hackage. Olaf > Hi, > > I'd like to request to take over the css-syntax hackage! The lead > developer of which seems to be barely active. They did accept someone > else's year-old pull request to fix an issue I was having regarding > upgrading to Text v2 upon being prodded, but hasn't responded to > communications since regarding publishing this update to Hackage. > > I am developing my own (NLnet-funded) noJS browser engine in Haskell, > and have released several modular components of it to Hackage in the > hopes they will be useful to others for other purposes. I've > benefited > tremendously from Haskell CSS Syntax & would like to see the project > continue, I can manage it as one of those subcomponents. I do not see > much further development being required, especially considering how > stable the W3C strives to keep part of the spec extremely stable. > > My communications to Haskell CSS Syntax: > https://github.com/wereHamster/haskell-css-syntax/issues/5 > https://github.com/wereHamster/haskell-css-syntax/pull/4 > > Thoughts? > > Adrian Cochrane > OpenWork Ltd

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Re: [Haskell-cafe] [ANNOUNCE] GHC 9.6.1-alpha3 is now available
by Ben Gamari 15 Feb '23

15 Feb '23

George Colpitts <george.colpitts(a)gmail.com> writes: > Hi > > I get a strange warning on MacOS when I do ./configure: > > checking Xcode version... xcode-select: error: tool 'xcodebuild' requires > Xcode, but active developer directory '/Library/Developer/CommandLineTools' > is a command line tools instance > not found (too old?) > > > I also get a related strange warning when I do a compile: > > ghc hello.hs > [1 of 2] Compiling Main ( hello.hs, hello.o ) [Missing object > file] > [2 of 2] Linking hello [Objects changed] > ld: warning: directory not found for option > '-L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.1.sdk/usr/lib' > Hmm, that is indeed odd. It sounds like you Xcode installation may be broken. Did you upgrade your operating system recently? Do you have Xcode, the CLT package, or both installed? Cheers, - Ben

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Takeover request: Haskell CSS Syntax
by Adrian Lyall Cochrane 15 Feb '23

15 Feb '23

Hi, I'd like to request to take over the css-syntax hackage! The lead developer of which seems to be barely active. They did accept someone else's year-old pull request to fix an issue I was having regarding upgrading to Text v2 upon being prodded, but hasn't responded to communications since regarding publishing this update to Hackage. I am developing my own (NLnet-funded) noJS browser engine in Haskell, and have released several modular components of it to Hackage in the hopes they will be useful to others for other purposes. I've benefited tremendously from Haskell CSS Syntax & would like to see the project continue, I can manage it as one of those subcomponents. I do not see much further development being required, especially considering how stable the W3C strives to keep part of the spec extremely stable. My communications to Haskell CSS Syntax: https://github.com/wereHamster/haskell-css-syntax/issues/5 https://github.com/wereHamster/haskell-css-syntax/pull/4 Thoughts? Adrian Cochrane OpenWork Ltd Lead developer of: libdggs geospatial analysis Rhapsode & Haphaestus web browsers

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[ANNOUNCE] GHC 9.6.1-alpha3 is now available
by Ben Gamari 14 Feb '23

14 Feb '23

The GHC team is very pleased to announce the availability of GHC 9.6.1-alpha3. As usual, binaries and source distributions are available at downloads.haskell.org: https://downloads.haskell.org/ghc/9.6.1-alpha3/ Beginning with GHC 9.6.1, GHC can be built as a cross-compiler to WebAssembly and JavaScript. This is an important step towards robust support for compiling Haskell to the Web, but there are a few caveats to be aware of in the 9.6 series: - Both the Javascript and WebAssembly backends are still at an early stage of development and are present in this release as a technology preview - Using GHC as a cross-compiler is not as easy as we would like it to be; in particular, there are challenges related to Template Haskell - GHC is not yet run-time retargetable; a given GHC binary targets exactly one platform, and both WebAssembly and JavaScript are considered platforms for this purpose. Cross-compilers must be built from source by their users We hope to lift all of these limitations in future releases. Additionally, 9.6.1 will include: - Significant latency improvements in the non-moving garbage collector - Efficient runtime support for delimited continuations - Improvements in compiler error messages - Numerous improvements in the compiler's memory usage See the [release notes] for a comprehensive accounting of changes in this release. As always, one can find a [migration guide] to aid in transitioning from older releases on the GHC Wiki. We have also recently started extending our release process to cover a wider set of Linux distributions. In particular, we now offer Rocky 8 and Ubuntu 20.04 binary distributions which cover RedHat-derivative and distributions using older `glibc` releases (namely 2.27), respectively. Please do give this release a try and open a [ticket] if you see anything amiss. Cheers, - Ben [ticket]: https://gitlab.haskell.org/ghc/ghc/issues/ [migration guide]: https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.6 [release notes]: https://downloads.haskell.org/ghc/9.6.1-alpha3/docs/users_guide/9.6.1-notes…

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ICFP 2023: Last Call for Papers
by ICFP Publicity 14 Feb '23

14 Feb '23

PACMPL Volume 7, Issue ICFP 2023 Call for Papers Accepted papers to be invited for presentation at The 28th ACM SIGPLAN International Conference on Functional Programming Seattle, USA http://icfp23.sigplan.org/ ### Important dates (All dates are in 2023 at 11.59pm anywhere on earth.) Submission deadline: 1 March 2023 (Wednesday) (https://icfp23.hotcrp.com) Author response: 1 May (Monday)--4 May (Thursday) Round 1 notification: 18 May (Thursday) Round 2 notification: 29 June (Thursday) Camera-ready deadline: 20 July (Thursday) Conference: 4 September (Monday)--9 September (Saturday) ### About PACMPL Proceedings of the ACM on Programming Languages (PACMPL <https://pacmpl.acm.org/>) is a Gold Open Access journal publishing research on all aspects of programming languages, from design to implementation and from mathematical formalisms to empirical studies. Each issue of the journal is devoted to a particular subject area within programming languages and will be announced through publicised Calls for Papers, like this one. ### Scope [PACMPL](https://pacmpl.acm.org/) issue ICFP 2023 seeks original papers on the art and science of functional programming. Submissions are invited on all topics from principles to practice, from foundations to features, and from abstraction to application. The scope includes all languages that encourage functional programming, including both purely applicative and imperative languages, as well as languages with objects, concurrency, or parallelism. Topics of interest include (but are not limited to): * Language Design: concurrency, parallelism, and distribution; modularity; components and composition; metaprogramming; macros; pattern matching; type systems; type inference; dependent types; effect types; gradual types; refinement types; session types; interoperability; domain-specific languages; imperative programming; object-oriented programming; logic programming; probabilistic programming; reactive programming; generic programming; bidirectional programming. * Implementation: abstract machines; virtual machines; interpretation; compilation; compile-time and run-time optimisation; garbage collection and memory management; runtime systems; multi-threading; exploiting parallel hardware; interfaces to foreign functions, services, components, or low-level machine resources. * Software-Development Techniques: algorithms and data structures; design patterns; specification; verification; validation; proof assistants; debugging; testing; tracing; profiling; build systems; program synthesis. * Foundations: formal semantics; lambda calculus; program equivalence; rewriting; type theory; logic; category theory; computational effects; continuations; control; state; names and binding; program verification. * Analysis and Transformation: control flow; data flow; abstract interpretation; partial evaluation; program calculation. * Applications: symbolic computing; formal-methods tools; artificial intelligence; systems programming; distributed systems and web programming; hardware design; databases; scientific and numerical computing; graphical user interfaces; graphics and multimedia; GPU programming; scripting; system administration; security. * Education: teaching introductory programming; mathematical proof; algebra. Submissions will be evaluated according to their relevance, correctness, significance, originality, and clarity. Each submission should explain its contributions in both general and technical terms, clearly identifying what has been accomplished, explaining why it is significant, and comparing it with previous work. The technical content should be accessible to a broad audience. PACMPL issue ICFP 2023 also welcomes submissions in two separate categories — Functional Pearls and Experience Reports — that must be marked as such when submitted and that need not report original research results. Detailed guidelines on both categories are given at the end of this call. Submissions from underrepresented groups are encouraged. Authors who require financial support to attend the conference can apply for PAC funding (http://www.sigplan.org/PAC/) The General Chair and PC Chair may not submit papers. PC members (other than the PC Chair) may submit papers. However, SIGPLAN guidelines dictate that they be held to a higher standard: a PC paper can be accepted if after the discussion it has at least one strongly-supportive review and no detractors. Each PC member may be listed as a coauthor on a maximum of three submissions. Please contact the Programme Chair if you have questions or are concerned about the appropriateness of a topic. ### Preparation of submissions *Deadline*: The deadline for submissions is **Wednesday, March 1, 2023**, Anywhere on Earth (<https://www.timeanddate.com/time/zones/aoe>). This deadline will be strictly enforced. *Formatting*: Submissions must be in PDF format, printable in black and white on US Letter sized paper and interpretable by common PDF tools. All submissions must adhere to the "ACM Small" template that is available (in both LaTeX and Word formats) from <https://www.acm.org/publications/authors/submissions>. There is a limit of **25 pages for a full paper or Functional Pearl** and **12 pages for an Experience Report**; in either case, the bibliography and an optional clearly marked appendix will not be counted against these limits. Submissions that exceed the page limits or, for other reasons, do not meet the requirements for formatting, will be summarily rejected. See also PACMPL's Information and Guidelines for Authors at <https://pacmpl.acm.org/authors.cfm>. *Submission*: Submissions will be accepted at <https://icfp23.hotcrp.com/> Improved versions of a paper may be submitted at any point before the submission deadline using the same web interface. *Author Response Period*: Authors will have a 72-hour period, starting at 12pm UTC on *Monday, May 1, 2023*, to read reviews and respond to them. *Appendix and Supplementary Material*: Authors have the option to include a clearly marked appendix and/or to attach supplementary material to a submission, on the understanding that reviewers may choose not to look at such an appendix or supplementary material. Supplementary material may be uploaded as a separate PDF document or tarball. Any supplementary material **must** be uploaded **at submission time**, not by providing a URL in the paper that points to an external repository. Authors are free to upload both anonymised and non-anonymised supplementary material. Anonymised supplementary material will be visible to reviewers immediately; non-anonymised supplementary material (which must be submitted separately) will be revealed to reviewers only after they have submitted their review of the paper and learned the identity of the author(s). *Authorship Policies*: All submissions are expected to comply with the ACM Policies for Authorship that are detailed at <https://www.acm.org/publications/authors/information-for-authors>. *Republication Policies*: Each submission must adhere to SIGPLAN's republication policy, as explained on the web at <http://www.sigplan.org/Resources/Policies/Republication>. *ORCID*: ORCID provides a persistent digital identifier (an ORCID iD) that you own and control, and that distinguishes you from every other researcher: https://orcid.org/. ACM now require an ORCID iD for every author of a paper, not just the corresponding author. So, the author who is filling out the permission form should make sure they have the ORCID iDs for all of their coauthors before filling out the form. Any authors who do not yet have an ORCID iD can go to https://orcid.org/register to have one assigned. ### Review Process This section outlines the two-stage process with lightweight double-blind reviewing that will be used to select papers for PACMPL issue ICFP 2023. **New this year**: ICFP 2023 will have an Associate Chair who will help the PC Chair monitor reviews, solicit external expert reviews for submissions when there is not enough expertise on the committee, and facilitate reviewer discussions. *PACMPL issue ICFP 2023 will employ a two-stage review process.* The first stage in the review process will assess submitted papers using the criteria stated above and will allow for feedback and input on initial reviews through the author response period mentioned previously. As a result of the review process, a set of papers will be conditionally accepted and all other papers will be rejected. Authors will be notified of these decisions on **May 18, 2023**. Authors of conditionally accepted papers will be provided with committee reviews along with a set of mandatory revisions. By June 15, 2023, the authors may provide a second submission. The second and final reviewing phase assesses whether the mandatory revisions have been adequately addressed by the authors and thereby determines the final accept/reject status of the paper. The intent and expectation is that the mandatory revisions can feasibly be addressed within three weeks. The second submission should clearly identify how the mandatory revisions were addressed. To that end, the second submission must be accompanied by a cover letter mapping each mandatory revision request to specific parts of the paper. The cover letter will facilitate a quick second review, allowing for confirmation of final acceptance within two weeks. Conversely, the absence of a cover letter will be grounds for the paper's rejection. *PACMPL issue ICFP 2023 will employ a lightweight double-blind reviewing process.* To facilitate this, submitted papers must adhere to two rules: 1. **author names and institutions must be omitted**, and 2. **references to authors' own related work should be in the third person** (e.g., not "We build on our previous work ..." but rather "We build on the work of ..."). The purpose of this process 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 anonymised). In addition, authors should feel free to disseminate their ideas or draft versions of their papers as they normally would. For instance, authors may post drafts of their papers on the web or give talks on their research ideas. ### Information for Authors of Accepted Papers * As a condition of acceptance, final versions of all papers must adhere to the ACM Small format. The page limit for the final versions of papers will be increased by two pages to help authors respond to reviewer comments and mandatory revisions: **27 pages plus bibliography for a regular paper or Functional Pearl, 14 pages plus bibliography for an Experience Report**. * Authors of accepted submissions will be required to agree to one of the three ACM licensing options, one of which is Creative Commons CC-BY publication; this is the option recommended by the PACMPL editorial board. A reasoned argument in favour of this option can be found in the article [Why CC-BY?](https://oaspa.org/why-cc-by/) published by OASPA, the Open Access Scholarly Publishers Association. The other options are copyright transfer to ACM or retaining copyright but granting ACM exclusive publication rights. * PACMPL is a Gold Open Access journal, and authors are encouraged to publish their work under a CC-BY license. Gold Open Access guarantees permanent free online access to the definitive version in the ACM Digital Library, and the recommended CC-BY option also allows anyone to copy and distribute the work with attribution. Gold Open Access has been made possible by generous funding through ACM SIGPLAN, which will cover all open access costs in the event authors cannot. Authors who can cover the costs may do so by paying an Article Processing Charge (APC). PACMPL, SIGPLAN, and ACM Headquarters are committed to exploring routes to making Gold Open Access publication both affordable and sustainable. * ACM Author-Izer is a unique service that enables ACM authors to generate and post links on either their home page or institutional repository for visitors to download the definitive version of their articles from the ACM Digital Library at no charge. Downloads through Author-Izer links are captured in official ACM statistics, improving the accuracy of usage and impact measurements. Consistently linking to the definitive version of an ACM article should reduce user confusion over article versioning. After an article has been published and assigned to the appropriate ACM Author Profile pages, authors should visit <http://www.acm.org/publications/acm-author-izer-service> to learn how to create links for free downloads from the ACM DL. * The official publication date is the date the papers are made available in the ACM Digital Library. This date may be up to *two weeks prior* to the first day of the conference. The official publication date affects the deadline for any patent filings related to published work. * Authors of each accepted submission are invited to attend and be available for the presentation of that paper at the conference. The schedule for presentations will be determined and shared with authors after the full program has been selected. ### Artifact Evaluation Authors of papers that are conditionally accepted in the first phase of the review process will be encouraged (but not required) to submit supporting materials for Artifact Evaluation. These items will then be reviewed by an Artifact Evaluation Committee, separate from the paper Review Committee, whose task is to assess how the artifacts support the work described in the associated paper. Papers that go through the Artifact Evaluation process successfully will receive a seal of approval printed on the papers themselves. Authors of accepted papers will be encouraged to make the supporting materials publicly available upon publication of the papers, for example, by including them as "source materials" in the ACM Digital Library. An additional seal will mark papers whose artifacts are made available, as outlined in the ACM guidelines for artifact badging. Participation in Artifact Evaluation is voluntary and will not influence the final decision regarding paper acceptance. ### Special categories of papers In addition to research papers, PACMPL issue ICFP solicits two kinds of papers that do not require original research contributions: Functional Pearls, which are full papers, and Experience Reports, which are limited to half the length of a full paper. Authors submitting such papers should consider the following guidelines. #### Functional Pearls A Functional Pearl is an elegant essay about something related to functional programming. Examples include, but are not limited to: * a new and thought-provoking way of looking at an old idea * an instructive example of program calculation or proof * a nifty presentation of an old or new data structure * an interesting application of functional programming techniques * a novel use or exposition of functional programming in the classroom While pearls often demonstrate an idea through the development of a short program, there is no requirement or expectation that they do so. Thus, they encompass the notions of theoretical and educational pearls. Functional Pearls are valued as highly and judged as rigorously as ordinary papers, but using somewhat different criteria. In particular, a pearl is not required to report original research, but, it should be concise, instructive, and entertaining. A pearl is likely to be rejected if its readers get bored, if the material gets too complicated, if too much-specialised knowledge is needed, or if the writing is inelegant. The key to writing a good pearl is polishing. A submission that is intended to be treated as a pearl must be marked as such on the submission web page and should contain the words "Functional Pearl" somewhere in its title or subtitle. These steps will alert reviewers to use the appropriate evaluation criteria. Pearls will be combined with ordinary papers, however, for the purpose of computing the conference's acceptance rate. #### Experience Reports The purpose of an Experience Report is to describe the experience of using functional programming in practice, whether in industrial application, tool development, programming education, or any other area. Possible topics for an Experience Report include, but are not limited to: * insights gained from real-world projects using functional programming * comparison of functional programming with conventional programming in the context of an industrial project or a university curriculum * project-management, business, or legal issues encountered when using functional programming in a real-world project * curricular issues encountered when using functional programming in education * real-world constraints that created special challenges for an implementation of a functional language or for functional programming in general An Experience Report is distinguished from a normal PACMPL issue ICFP paper by its title, by its length, and by the criteria used to evaluate it. * Both in the papers and in any citations, the title of each accepted Experience Report must end with the words "(Experience Report)" in parentheses. The acceptance rate for Experience Reports will be computed and reported separately from the rate for ordinary papers. * Experience Report submissions can be at most 12 pages long, excluding bibliography. * Each accepted Experience Report will be presented at the conference, but depending on the number of Experience Reports and regular papers accepted, authors of Experience Reports may be asked to give shorter talks. * Because the purpose of Experience Reports is to enable our community to understand the application of functional programming, an acceptable Experience Report need not add to the body of knowledge of the functional-programming community by presenting novel results or conclusions. It is sufficient if the Report describes an illuminating experience with functional programming, or provide evidence for a clear thesis about the use of functional programming. The experience or thesis must be relevant to ICFP, but it need not be novel. The review committee will accept or reject Experience Reports based on whether they judge the paper to illuminate some aspect of the use of functional programming. Anecdotal evidence will be acceptable provided it is well-argued and the author explains what efforts were made to gather as much evidence as possible. Typically, papers that show how functional programming was used are more convincing than papers that say only that functional programming was used. It can be especially effective to present comparisons of the situations before and after the experience described in the paper, but other kinds of evidence would also make sense, depending on context. Experience drawn from a single person's experience may be sufficient, but more weight will be given to evidence drawn from the experience of groups of people. An Experience Report should be short and to the point. For an industrial project, it should make a claim about how well functional programming worked and why; for a pedagogy paper, it might make a claim about the suitability of a particular teaching style or educational exercise. Either way, it should produce evidence to substantiate the claim. If functional programming worked in this case in the same ways it has worked for others, the paper need only summarise the results — the main part of the paper should discuss how well it worked and in what context. Most readers will not want to know all the details of the experience and its implementation, but the paper should characterise it and its context well enough so that readers can judge to what degree this experience is relevant to their own circumstances. The paper should take care to highlight any unusual aspects; specifics about the experience are more valuable than generalities about functional programming. If the paper not only describes experience but also presents new technical results, or if the experience refutes cherished beliefs of the functional-programming community, it may be better to submit it as a full paper, which will be judged by the usual criteria of novelty, originality, and relevance. The Program Chair will be happy to advise on any concerns about which category to submit to. ### ICFP Organisers General Chair: Nikhil Swamy (Microsoft Research, USA) Programme Chair: Sam Lindley (The University of Edinburgh, Scotland) Publicity Chair: Ilya Sergey (National University of Singapore, Singapore) Accessibility Co-Chairs: Vadim Zaliva (University of Cambridge, UK) and Calvin Beck (University of Pennsylvania, USA) Artifact Evaluation Chair: Jannis Limpberg (Vrije Universiteit Amsterdam, Netherlands) Diversity Chair: Daan Leijen (Microsoft Research, USA) Industrial Relations Co-Chairs: Atze Dijkstra (Standard Chartered Bank, England) and Mathieu Bosepflug (Tweag I/O, France) Programming Contest Co-Organisers: Alperen Keles (University of Maryland, USA) and Aymeric Fromherz (Inria, France) Student Research Competition Chair: Daniel Hillerström (The University of Edinburgh, Scotland) Video Chair: Apoorv Ingle (Iowa, USA) Workshops Co-Chairs: Arther Azevedo de Amorim (Boston University, USA) and Yannick Forster (Inria, France) ### PACMPL Volume 7, Issue ICFP 2023 Associate Editor: Sam Lindley (The University of Edinburgh, Scotland) Review Committee: Aggelos Biboudis, Oracle, Switzerland Alan Jeffrey, Roblox, USA Amos Robinson, Unaffiliated, Australia Andreea Costea, National University of Singapore, Singapore Andrew Hirsch, University of Buffalo, USA Andy Gill, Cerebrus Systems, USA Armando Solar-Lezama, MIT, USA Arnaud Spiwack, Tweag, France Benjamin C. Pierce, University of Pennsylvania, USA Beta Ziliani, FAMAF, UNC and Manas.Tech, Argentina Chung-Kil Hur, Seoul National University, South Korea Delia Kesner, Université de Paris, France Dylan McDermott, Reykjavik University, Iceland Éric Tanter, University of Chile, Chile Gabriel Radanne, Inria, France Gerwin Klein, Proofcraft & UNSW Sydney, Australia Hannah Gommerstadt, Vasser College, USA James Chapman, Input Output, Scotland James McKinna, Heriot-Watt, Scotland Jan Midtgaard, Tarides, Denmark Jeremy Gibbons, University of Oxford, England Jonathan Brachthäuser, University of Tübingen, Germany Jonathan Sterling, Aarhus University, Denmark José Pedro Magalhães, Standard Chartered Bank, England Josh Berdine, Meta UK, England Kathrin Stark, Heriot-Watt, Scotland Laura Bocchi, Kent, England Lennart Augustsson, Epic Games, Sweden Liang-Ting Chen, Academia Sinica, Taiwan, Taiwan Lionel Parreaux, HKUST, Hong Kong Marcos Viera, Universidad de la República, Uruguay Matthew Flatt, University of Utah, USA Michael D. Adams, National University of Singapore, Singapore Michael Greenberg, Stevens Institute of Technology, USA Niki Vazou, IMDEA, Spain Oliver Bračevac, Purdue University, USA Patrik Jansson, CSE, Chalmers and UGOT, Sweden, Sweden Paul Downen, UMass Lowell, USA Peter Thiemann, University of Freiburg, Germany Sam Tobin-Hochstadt, Indiana University, USA Satnam Singh, Groq, USA Sean Moss, Oxford, England Sebastian Erdweg, JGU Mainz, Germany Shin-ya Katsumata, National Institute of Informatics, Japan Simon Gay, University of Glasgow, Scotland Sonia Marin, University of Birmingham, England Stephen Dolan, Jane Street, England Susmit Sarkar, University of St Andrews, Scotland Tahina Ramananandro, Microsoft, USA Takeshi Tsukada, Chiba University, Japan Talia Ringer, University of Illinois at Urbana-Champaign, USA Yukiyoshi Kameyama, University of Tsukuba, Japan Zhenjiang Hu, Peking University, China

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Midlands Graduate School, 2-6 April 2023, Birmingham , UK
by Graham Hutton 14 Feb '23

14 Feb '23

Dear all, Registration is now open for this years Midlands Graduate School, which takes place 2-6 April 2023 at the University of Birmingham, UK: http://www.tinyurl.com/MGS2023 MGS provides an intensive course of lectures on the Mathematical Foundations of Computing. It has been running for approaching 25 years, and attracts around 100 participants per year from both academia and industry. This year's courses: - Domain theory and denotational semantics (Tom de Jong) - Type theory (Thorsten Altenkirch) - Category theory (Nicolai Kraus) - Computational models of higher categories (Jamie Vicary) - Homotopy type theory (Eric Finster) - String diagrams (Dan Marsden) - Algebraic semantics and verification (Georg Struth) - Effects and call-by-push-value (Paul Levy) Spaces are limited, so early registration is recommended. Please share! Best wishes, Graham -- Professor Graham Hutton School of Computer Science University of Nottingham, UK http://www.cs.nott.ac.uk/~pszgmh 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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