September 2025 - Haskell

TFPIE 2026 - Call for Papers
by Mart Lubbers 29 Sep '25

29 Sep '25

TFPIE 2026 Call for papers https://wiki.tfpie.science.ru.nl/TFPIE2026 (January 26th 2026, Odense, Denmark, co-located with TFP 2026 at University of Southern Denmark) TFPIE 2026 welcomes submissions describing techniques used in the classroom, tools used in and/or developed for the classroom and any creative use of functional programming (FP) to aid education in or outside Computer Science. Topics of interest include, but are not limited to: - FP and beginning CS students - FP and Computational Thinking - FP and Artificial Intelligence - FP in Robotics - FP and Music - Advanced FP for undergraduates - FP in graduate education - Engaging students in research using FP - FP in Programming Languages - FP in the high school curriculum - FP as a stepping stone to other CS topics - FP and Philosophy - The pedagogy of teaching FP - FP and e-learning: MOOCs, automated assessment etc. - Best Lectures - more details below In addition to papers, we are requesting best lecture presentations. What's your best lecture topic in an FP related course? Do you have a fun way to present FP concepts to novices or perhaps an especially interesting presentation of a difficult topic? In either case, please consider sharing it. Best lecture topics will be selected for presentation based on a short abstract describing the lecture and its interest to TFPIE attendees. The length of the presentation should be comparable to that of a paper. In addition, the speaker can provide commentary on effectiveness or student feedback. ## Submissions Potential presenters are invited to submit an extended abstract (4-6 pages) or a draft paper (up to 20 pages) in EPTCS style. The authors of accepted presentations will have their preprints and their slides made available on the workshop's website. Papers and abstracts can be submitted via easychair at the following link: https://easychair.org/conferences/?conf=tfpie2026 After the workshop, presenters are invited to submit (a revised version of) their article for the formal review. The PC will select the best articles for publication in the Electronic Proceedings in Theoretical Computer Science (EPTCS). Articles rejected for presentation and extended abstracts will not be formally reviewed by the PC. ## Important Dates Submission deadline: December 26th 2023, Anywhere on Earth Notification: by December 30th 2023 (Note: submissions will be evaluated on a rolling basis, so earlier submissions will receive an earlier response) TFPIE Registration Deadline: Workshop: January 26th 2026 Submission for formal review: April 22nd 2026, Anywhere on Earth Notification of full article: May 27th 2026 Camera ready: June 24th 202 ## Program Committee Mart Lubbers, Radboud University, Nijmegen, Netherlands (PC Chair) Tim Steenvoorden, Open Universitei, Heerlen, Netherlands Marco T. Morazán, Seton Hall University, South Orange, NJ, USA Guannan Wei, Tufts University, Medford, MA, USA Marcos Viera, Universidad de la República, Montevideo, Uruguay Johannes Åman Pohjola, Chalmers University of Technology, Götenburg, Sweden ## Registration information See https://wiki.tfpie.science.ru.nl/TFPIE2026 for updated information. Registration and attendance are mandatory for at least one author of every paper that is presented at the workshop. Only papers that have been presented at TFPIE may be submitted to the post-reviewing process.

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[ANN] Announcing streamly-0.11.0 and streamly-core-0.3.0
by Adithya Kumar 28 Sep '25

28 Sep '25

streamly-0.11.0 and streamly-core-0.3.0 <https://github.com/composewell/streamly> are now available on Hackage. User guides <https://streamly.composewell.com/streamly-0.11.0/Tutorials/why-haskell-stre…>, combined reference and Hoogle search <https://streamly.composewell.com/search.html?query=&ecosystem=streamly-0.11…> across all Streamly ecosystem packages can be found on the Streamly website <https://streamly.composewell.com/index.html>. Important features in this release are: - *Scans with Scanl*: The new Streamly.Data.Scanl <https://streamly.composewell.com/haddocks/streamly-core-0.3.0/Streamly-Data…> module allows you to compose multiple stateful transformations (i.e. scans) on a stream. You can split a stream into multiple constituent streams, process each independently, and then merge the results. With Streamly.Data.Scanl.Prelude <https://streamly.composewell.com/haddocks/streamly-0.11.0/Streamly-Data-Sca…>, you can compose concurrent scans i.e. each branch of the split scan can run in a different thread. - *New concurrent fold combinators*: Extended Streamly.Data.Fold.Prelude <https://streamly.composewell.com/haddocks/streamly-0.11.0/Streamly-Data-Fol…> with some powerful concurrent fold combinators. - *Deterministic resource cleanup*: Introduced APIs that guarantee timely resource release, eliminating reliance on GC-based cleanup. The library now offers low-level IO primitives and high-level stream combinators for resource management — everything you can do with resourcet, and more, is built in. - *Fair nesting of streams*: Added operations that interleave inner and outer streams fairly, ensuring balanced exploration. Particularly powerful for logic programming. - *Circular buffers*: Added Streamly.Data.RingArray <https://streamly.composewell.com/haddocks/streamly-core-0.3.0/Streamly-Data…>, a high-performance, unboxed circular buffer. - *File system paths*: Streamly.FileSystem.Path <https://streamly.composewell.com/haddocks/streamly-core-0.3.0/Streamly-File…> module leverages streamly arrays, and streams for performance and flexibility, provides better safety, and is intended for gradual type safe extensions in future. The type can be directly coerced into OsPath. - *streamly-text* package provides coercion from the Text type to streamly Array type and vice-versa. - *streamly-fsevents* package provides file system event watch streams (fsnotify) — portable as well as full support for low level OS specific file system event APIs. This was earlier part of the streamly package, now has been split into a separate package. We’ve made every effort to prevent breaking changes, and the API has remained stable since version 0.9.0. See the following docs for more details: - streamly-core changelog <https://streamly.composewell.com/streamly-core-0.3.0/Changelog.html> and full API diff from streamly-core 0.2.2 to 0.3.0 <https://streamly.composewell.com/streamly-core-0.3.0/ApiChangelogs/0.2.2-0.…> - streamly changelog <https://streamly.composewell.com/streamly-0.11.0/Project/Changelog.html> and full API diff from streamly 0.10.1 to 0.11.0 <https://streamly.composewell.com/streamly-0.11.0/Project/ApiChangelogs/0.10…> Please visit our blog <https://blog.composewell.com/> for the latest updates!

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[TFP 2026] Call for Papers for the 27th International Symposium on Trends in Functional Programming, Odense, Denmark, January 2026
by Peter Achten 22 Sep '25

22 Sep '25

# TFP 2026 -- Call for Papers (trendsfp.github.io) ## Important Dates * Submission deadline (pre-symposium, full papers): Thu 13th Nov 2025 (AOE) * Notification (pre-symposium, full papers): Thu 11th Dec 2025 * Submission deadline (pre-symposium draft papers): Thu 11th Dec 2025 (AOE) * Notification (pre-symposium draft papers): Fri 19th Dec 2025 * Submission deadline (post-symposium review): Thu 5th Mar 2026 (AOE) * Notification (post-symposium submissions): Thu 16th Apr 2026 The Symposium on Trends in Functional Programming (TFP) is an international forum for researchers with interests in all aspects of functional programming, taking a broad view of current and future trends in the area. It aspires to be a lively environment for presenting the latest research results, and other contributions. This year, TFP will take place in-person at the University of Southern Denmark, in Odense, Denmark. It is co-located with the Trends in Functional Programming in Education (TFPIE) workshop, which will take on the day before the main symposium. Please be aware that TFP has several submission deadlines. The first, 13th November, is for authors who wish to have their full paper reviewed prior to the symposium. Papers that are accepted in this way must also be presented at the symposium. The second, 11th December, is for authors who wish to present their work or work-in-progress at the symposium first without submitting to the full review process for publication. These authors can then take into account feedback received at the symposium and submit a full paper for review by the third deadline, 19th February. ## Scope The symposium recognizes that new trends may arise through various routes. As part of the Symposium's focus on trends we therefore identify the following five paper categories. High-quality submissions are solicited in any of these categories: * Research Papers: Leading-edge, previously unpublished research work * Position Papers: On what new trends should or should not be * Project Papers: Descriptions of recently started new projects * Evaluation Papers: What lessons can be drawn from a finished project * Overview Papers: Summarizing work with respect to a trendy subject Papers must be original and not simultaneously submitted for publication to any other forum. They may consider any aspect of functional programming: theoretical, implementation-oriented, or experience-oriented. Applications of functional programming techniques to other languages are also within the scope of the symposium. Topics suitable for the symposium include, but are not limited to: * Functional programming and multicore/manycore computing * Functional programming in the cloud * High performance functional computing * Extra-functional (behavioural) properties of functional programs * Dependently typed functional programming * Validation and verification of functional programs * Debugging and profiling for functional languages * Functional programming in different application areas: security, mobility, telecommunications applications, embedded systems, global computing, grids, etc. * Interoperability with imperative programming languages * Novel memory management techniques * Program analysis and transformation techniques * Empirical performance studies * Abstract/virtual machines and compilers for functional languages * (Embedded) domain specific languages * New implementation strategies * Any new emerging trend in the functional programming area If you are in doubt on whether your paper is within the scope of TFP, please contact the programme chair, Casper Bach. ## Best Paper Awards TFP awards two prizes for the best papers each year. First, to reward excellent contributions, TFP awards a prize for the best overall paper accepted for the post-conference formal proceedings. Second, each year TFP also awards a prize for the best student paper. TFP traditionally pays special attention to research students, acknowledging that students are almost by definition part of new subject trends. A student paper is one for which the authors state that the paper is mainly the work of students, the students are the paper's first authors, and a student would present the paper. In both cases, it is the PC of TFP that awards the prize. In case the best paper happens to be a student paper, then that paper will receive both prizes. ## Instructions to Authors Submission is via HotCRP: https://tfp26.hotcrp.com/ Authors of papers have the choice of having their contributions formally reviewed either before or after the Symposium. Further, pre-symposium submissions may either be full (earlier deadline) or draft papers (later deadline). See below for more details. Submission is single-blind. Submissions are welcome from PC members (except the chair). Accepted papers from the pre-symposium and post-symposium formal review will appear in a formal proceedings, published by Springer. Papers must be written in English, and written using the LNCS style. For more information about formatting please consult the Springer LNCS Guidelines web site (https://www.springer.com/gp/computer-science/lncs/conference-proceedings-gu…) ### Pre-symposium formal review Papers to be formally reviewed before the symposium should be submitted before the early deadline and will receive their reviews and notification of acceptance for both presentation and publication before the symposium. A paper that has been rejected for publication but accepted for presentation may be revised and resubmitted for the post-symposium formal review. ### Post-symposium formal review Draft papers will receive minimal reviews and notification of acceptance for presentation at the symposium. Authors of draft papers will be invited to submit revised papers based on the feedback received at the symposium. A post-symposium refereeing process will then select a subset of these papers for formal publication. ### Paper categories Draft papers and papers submitted for formal review are submitted as extended abstracts (4 to 10 pages in length) or full papers (up to 20 pages). The submission must clearly indicate which category it belongs to: research, position, project, evaluation, or overview paper. It should also indicate which authors are research students, and whether the main author(s) are students. A draft paper for which all authors are students will receive additional feedback by one of the PC members shortly after the symposium has taken place. ## Organizing Committee | Casper Bach | University of Southern Denmark, DK | Programme Chair | | Jeremy Gibbons | University of Oxford | General Chair | | Peter Achten | Radboud University Nijmegen, NL | Publicity Chair | | Marco T. Morazán | Seton Hall University, US | Steering Committee Chair | ## Programme Committee | Alex Gerdes | University of Gothenburg and Chalmers, SE | | Andrew Tolmach | Portland State University, US | | Ben Greenman | University of Utah, US | | Bruno Oliveira | University of Hong Kong, HK | | Cas van der Rest | Shielded Technologies, NL | | Cristina Matache | University of Edinburgh, UK | | Di Wang | Peking University, CN | | Dylan McDermott | University of Oxford, UK | | Eric Van Wyk | University of Minnesota, US | | Jan de Muijnck-Hughe | Strathclyde, UK | | Jeremy Yallop | University of Cambridge, UK | | Jesper Cockx | Delft University of Technology, NL | | Jules Jacobs | Cornell University, US | | Mart Lubbers | Radboud University, NL | | Matthew Lutze | Aarhus University, DK | | Max S. New | University of Michigan, US | | Nicolas Wu | Imperial College London, UK | | Patrick Bahr | IT University of Copenhagen, DK |

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Postdoc positions at NII / ROIS Tokyo in formal verification of secure systems
by Taro Sekiyama 16 Sep '25

16 Sep '25

Hi all, We are recruiting postdocs to work on formal methods and programming languages for the formal verification of TEE architectures, at National Institue of Informatics (NII) (https://www.nii.ac.jp/en/) / Research Organization of Information and Systems (ROIS) ( https://www.rois.ac.jp/en/index.html) Tokyo, Japan. We'd be grateful if you could spread the word to interested candidates. This position is especially suited for programming language or program verification researchers seeking a new application domain at the intersection of systems programming, security, and hardware, with opportunities to develop new theory accordingly. Relevant techniques (but not limited to) include: - Proof assistants (e.g., Rocq and Agda) - Type systems (especially for verification, like refinement and dependent type systems, or for systems programming, like C and Rust) - Program logics (e.g., Separation Logic) - Formal security verification - Program refinement - Program verifiers based on these techniques Experience in modeling or verifying low-level languages (such as C, Rust, assembly languages, Verilog), systems software, or hardware will also be highly valued. Please refer to the following webpage for the scope, details, and how to apply. https://hackmd.io/@TaroSekiyama/H1ewltLsxx Best regards, Taro Sekiyama National Institue of Informatics https://skymountain.github.io

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Tenure-track Faculty Positions at the IMDEA Software Institute
by Manuel Hermenegildo 08 Sep '25

08 Sep '25

TENURE-TRACK FACULTY POSITIONS AT THE IMDEA SOFTWARE INSTITUTE The IMDEA Software Institute invites applications for tenure-track (Assistant Professor) faculty positions. We are primarily interested in recruiting excellent candidates in the areas of: Machine Learning, including Formal Reasoning about ML Systems, Explainable AI, Data Analysis at Large Scale, etc.; Privacy; Quantum computing; Software Engineering; and Systems, including Distributed Systems, Embedded Systems, Databases, etc. Exceptional candidates in other topics within the general research areas of the Institute will also be considered. Tenure clock adjustments and fast tracking can be considered for candidates in different career stages. The primary mission of the IMDEA Software Institute is to perform research of excellence at the highest international level in software development technologies. It is one of the highest-ranked institutions worldwide in its main topic areas. * Selection The main selection criteria are the candidate's demonstrated ability and commitment to research, the match of interests with the Institute's mission, and how the candidate complements areas of established strengths of the Institute. All positions require a doctoral degree in Computer Science or a closely related area, earned by the expected start date. Candidates for tenure-track positions will have shown exceptional promise in research and will have displayed an ability to work independently as well as collaboratively. * Application Should be completed using the application form at: https://careers.software.imdea.org/ Please select reference "2025-09-faculty-call" at the beginning of the form. For full consideration, complete applications must be received by November 14, 2025. * Working at the IMDEA Software Institute The Institute is located in the vibrant area of Madrid, Spain. It offers an ideal working environment, combining the best aspects of a research center and a university department. Its researchers can focus on developing new ideas and projects, in collaboration with world-leading, international faculty, post-docs, and students. Researchers also have the opportunity (but no obligation) to teach university courses. The Institute offers institutional funding and also encourages its members to participate in national and international research projects. The working language at the Institute is English. Salaries at the Institute are internationally competitive and established on an individual basis. They include social security provisions in accordance with existing national Spanish legislation, and in particular access to an excellent public health care system. Further information about the Institute's current faculty and research can be found at http://www.software.imdea.org The IMDEA Software Institute is an Equal Opportunity Employer and strongly encourages applications from a diverse and international community and underrepresented groups. The Institute complies with the European Charter for Researchers. -- ------------------------------------------------------------------------- Manuel Hermenegildo manuel.hermenegildo(a)imdea.org -------------------------------------------------------------------------

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IFL2025 Call for Participation
by Mart Lubbers 05 Sep '25

05 Sep '25

========================================================== Call for Participation IFL 2025 37th Symposium on Implementation and Application of Functional Languages Montevideo, Uruguay October 1-3, 2025 (Tutorials September 29-30) https://www.fing.edu.uy/inco/congresos/ifl2025 ========================================================== The goal of the IFL symposia is to bring together researchers actively engaged in the implementation and application of functional and function-based programming languages. IFL 2025 will be a venue for researchers to present and discuss new ideas and concepts, work in progress, and publication-ripe results related to the implementation and application of functional languages and function-based programming. ### Registration The registration fee covers use of facilities, participation in the tutorials and symposium, lunches, coffee breaks, social outing, symposium dinner and access to draft proceedings. Early Bird Registration Deadline is Sep 5, 2025. https://www.fing.edu.uy/inco/congresos/ifl2025/register.html If you choose online payment at registration, you will receive payment instructions during the week. ### Keynote speakers Roberto Ierusalimschy Departamento de Informática, PUC-Rio, Río de Janeiro, Brazil Functions in Lua Iván Pérez NASA Ames Research Center, California, USA Making Haskell Fly https://www.fing.edu.uy/inco/congresos/ifl2025/keynotes.html ### Tutorials On September 29 and 30, the two days prior to the symposium, four tutorials will be held: Gradual typing Éric Tanter, University of Chile, Chile Type Based Static Analysis Jurriaan Hage, Heriot-Watt University, UK Development of dApps in the UTxO model TxPipe, Argentina Programming-Based Automata Theory Marco T. Morazán, Seton Hall University, USA https://www.fing.edu.uy/inco/congresos/ifl2025/tutorials.html ### Accepted Papers Regular Papers: Compilation of the Stochastic Language ALEA, Baltasar Trancón Y Widemann and Markus Lepper. Design and Implementation of DSLs for Unit Testing, Marco T. Morazán and Andres Garced. Recipe-Based Errors: Methodology, Implementation, and Evaluation, Marco T. Morazán, Shamil Dzhatdoyev, Josephine Des Rosiers, Rose Bohrer, Andres Garced and David Anthony Fields. Refinement-Types Driven Development: A study, Facundo Domínguez and Arnaud Spiwack. Draft Papers: AI-Assisted Program Design Using Structural Recursion, Marco T. Morazán. A Quantum-Control Lambda-Calculus with Multiple Measurement Bases, Nicolas A. Monzon and Alejandro Díaz-Caro. Automatic Testing for Finite-State Machines, Marco T. Morazán, Sophia G. Turano, Andres Garced and David Anthony Fields. Closures in a Higher-Order Polymorphic DSL for GPU programming, Andre Rauber Du Bois, Henrique Gabriel Rodrigues and Rodrigo Geraldo Ribeiro. Energy-aware Data-Parallel Functional Array Processing for Heterogeneous Platforms, Clemens Grelck. Formalizating System I with type Top in Agda, Agustín Séttimo, Cristian Sottile and Cecilia Manzino. Foundations of Gradual Abstract Interpretation, Gaspar Ricci, Sebastian Erdweg, Éric Tanter and Matías Toro. Heuristics-based Type Error Diagnosis for Haskell: the case of type families, Niels Kwadijk and Jurriaan Hage. Higher-ranked region inference for polymorphic, lazy languages, Ivo Gabe de Wolff and Jurriaan Hage. Improving a Group Membership Protocol Implementation using Liquid Haskell and QuickCheck, Jianhao Li and Viktoria Zsok. List Fold Operators in Dafny, Juan Michelini, Nora Szasz and Alvaro Tasistro. Reducibility candidates modulo isomorphisms, Cristian Sottile and Alejandro Díaz-Caro. Type Checking Dependently Sorted Nominal Signatures, Maribel Fernandez, Miguel Pagano, Nora Szasz and Alvaro Tasistro. Unrestricted Grammar Design and Visualization: A Design Recipe and Dynamic Visualization Tool, Marco T. Morazán, Andres Garced and Tijana Minić.

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