April 2009 - Haskell - Haskell.org

WFLP09: Deadline Extension
by Santiago Escobar 23 Apr '09

23 Apr '09

******************************************************************* DEADLINE EXTENSION WFLP 2009 18th International Workshop on Functional and (Constraint) Logic Programming Brasilia, Brazil, June, 28, 2009 http://www.dsic.upv.es/workshops/wflp09/ ********* part of the Federated Conference on Rewriting, Deduction, and Programming RDP'09 http://rdp09.cic.unb.br/index.html ******************************************************************* IMPORTANT DATES Abstract Submission April 27, 2009 Full Paper Submission May 3, 2009 Acceptance Notification May 25, 2009 Preliminary Proceedings June 8, 2009 Workshop June 28, 2009 PUBLICATION Preliminary proceedings will be available at the workshop. Selected authors will be invited to submit a full version of their papers after the workshop. Contributions accepted for the post-workshop proceedings will be published in Lecture Notes in Computer Science. INVITED SPEAKERS Claude Kirchner INRIA Bordeaux - Sud-Ouest, France Roberto Ierusalimschy Departamento de Informatica, PUC-Rio, Brazil

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[Types] TYPES annual workshop in Aussois, France.
by Christophe Raffalli 22 Apr '09

22 Apr '09

Dear list members, The Types 2009 meeting will be held in Aussois, at the "centre Paul Langevin" managed by the CNRS. This centre will supply everything: conference room, accommodation, meals, etc. It should provide very good conditions for profitable work. Early registration is now closed, but you can still register (until the week before the workshop). We also extended the deadline for talks submissions until the 27th of April. You are welcome to submit a talk or a demo You can find all the information on the workshop web page: http://www.lama.univ-savoie.fr/~types09/index.php Hoping to see some of you in Aussois, best regards, The TYPES 2009 program commitee. --

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Call for Participation: Utrecht Summer School on Applied Functional Programming
by Andres Loeh 22 Apr '09

22 Apr '09

Call for participation: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Utrecht Summer School in Computer Science: Applied Functional Programming August 17-28, 2009 Utrecht, The Netherlands ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We are offering a summer school that may be interesting to Haskell beginners on this list. We mainly target bachelor and master students, but others interested are also welcome to apply. Note that the deadline for applications is very soon; May 1, 2009. More information: http://www.utrechtsummerschool.nl/index.php?type=courses&code=H9 Cheers, Andres -- Andres Loeh, Universiteit Utrecht mailto:andres@cs.uu.nl mailto:mail@andres-loeh.de http://www.andres-loeh.de

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Re: [Haskell-cafe] ANN: list-tries-0.0 - first release
by Martijn van Steenbergen 21 Apr '09

21 Apr '09

Matti Niemenmaa wrote: > In order to run properly, list-tries needs a version of 'containers' > that hasn't yet been released. I incorporated a little hack which makes > it compile even with 0.2, but some calls will fail by calling 'error': > 30 of my 1014 test cases do so. 1014 test cases?! Wow. :-) FYI, list-tries installed without any problems (with containers-0.2.0.0). Thanks, Martijn.

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Second Call for Papers: 2nd International Conference on Software Language Engineering
by Serebrenik, A. 21 Apr '09

21 Apr '09

__________________________________________________________________ Call for Papers - SLE 2009 2nd International Conference on Software Language Engineering http://planet-sl.org/sle2009 Denver, Colorado, October 5-6, 2009 ___________________________________________________________________ Co-located with 12th International Conference on Model-Driven Engineering Languages and Systems (MODELS 2009) and 8th International Conference on Generative Programming and Component Engineering (GPCE 2009) Proceedings will be published in the LNCS series (subject to Springer's approval). The 2nd International Conference on Software Language Engineering (SLE) is devoted to topics related to artificial languages in software engineering. SLE's foremost mission is to encourage and organize communication between communities that have traditionally looked at software languages from different, more specialized, and yet complementary perspectives. SLE emphasizes the fundamental notion of languages as opposed to any realization in specific "technical spaces". SLE 2009 will be co-located with the 12th IEEE/ACM International Conference on Model-Driven Engineering Languages and Systems (MODELS 2009). Scope ----- The term 'software language' comprises all sorts of artificial languages used in software development including general-purpose programming languages, domain-specific languages, modeling and meta-modeling languages, data models, and ontologies. Used in its broadest sense, examples include modeling languages such as UML-based and domain-specific modeling languages, business process modeling languages, and web application modeling languages. The term 'software language' also comprises APIs and collections of design patterns that are implicitly defined languages. Software language engineering is the application of a systematic, disciplined, quantifiable approach to the development, use, and maintenance of these languages. Thus, the SLE conference is concerned with all phases of the life cycle of software languages; these include the design, implementation, documentation, testing, deployment, evolution, recovery, and retirement of languages. Of special interest are tools, techniques, methods and formalisms that support these activities. In particular, tools are often based on or even automatically generated from a formal description of the language. Hence, of special interest is the treatment of language descriptions as software artifacts, akin to programs - while paying attention to the special status of language descriptions, subject to tailored engineering principles and methods for modularization, refactoring, refinement, composition, versioning, co-evolution, and analysis. Topics of interest ------------------ We solicit high-quality contributions in the area of SLE ranging from theoretical and conceptual contributions to tools, techniques and frameworks that support the aforementioned life cycle activities. Some examples of tools, techniques, applications, and problems are listed below in order to clarify the types of contributions sought by SLE. * Formalisms used in designing and specifying languages and tools that analyze such language descriptions. * Language implementation techniques, grammar-based and metamodel-based. * Program and model transformation tools. * Composition, integration, and mapping tools for managing different aspects of software languages or different manifestations of a given language. * Language evolution. * Approaches to the elicitation, specification, and verification of requirements for software languages. * Language development frameworks, methodologies, techniques, best practices, and tools for the broader language life cycle covering phases such as analysis, testing, and documentation. * Design challenges in SLE. * Applications of languages including innovative domain-specific languages or "little" languages Do note that this list is not exclusive and many examples of tools, techniques, approaches have not been listed. Please visit the conference web site to see a more elaborate description of the topics of interests. The program committee chairs encourage potential contributors to contact them with questions about the scope and topics of interest of SLE. Paper Submission ---------------- We solicit the following types of papers: * Research papers. These should report a substantial research contribution to SLE and/or successful application of SLE techniques. Full paper submissions must not exceed 20 pages. * Short papers. These may describe interesting or thought-provoking concepts that are not yet fully developed or evaluated, make an initial contribution to challenging research issues in SLE, or discuss and analyze controversial issues in the field. These papers must not exceed 10 pages. * Tool demonstration papers. Because of SLE's ample interest in tools, we seek papers that present software tools related to the field of SLE. These papers will accompany a tool demonstration to be given at the conference. These papers must not exceed 10 pages. The selection criteria include the originality of the tool, its innovative aspects, the relevance of the tool to SLE, and the maturity of the tool. Submissions may also include an appendix (that will not be published) containing additional screen-shots and discussion of the proposed demonstration. * Mini-tutorial papers. SLE is composed of various research areas, such as grammarware, modelware, language schemas, and semantic technologies. The cross product of attendees at SLE creates a situation where the contribution from one session may be difficult to understand by those not initiated to the area. To help unite the various communitues of SLE 2009, mini-tutorials are solicited that provide discussion points for mapping common ideas between the area and differentiating among variations. A mini-tutorial submisson should be between 15 and 20 pages. Submitted articles must not have been previously published or currently be submitted for publication elsewhere. All submitted papers will be closely reviewed by at least three members of the program committee. All accepted papers will be made available at the conference in the pre-proceedings and published in the post-proceedings of the conference, which will appear in Springer's Lecture Notes in Computer Science series. Authors will have the opportunity to revise their accepted paper for the pre- and post-proceedings. All papers must be formatted by following Springer's LNCS style and must be submitted using EasyChair (open early June): http://www.easychair.org/conferences/?conf=sle09 Further details regarding submission can be found on the SLE web page: http://planet-sl.org/sle2009 Invited Speakers ---------------- James Cordy, Queens University, Canada Jean Bezivin, University of Nantes, France Important Dates --------------- * Initial abstract submission (required) July 3, 2009 * Paper submission: July 10, 2009 * Author notification: August 21, 2009 * Paper submission for pre-proceedings: September 14, 2009 * Conference: October 5-6, 2009 * Camera-ready paper submission for post-proceedings: December 7, 2009 * LNCS post-proceedings mailed to authors (approx.): February 2010 Organization ------------ General Chair * Dragan Gasevic, Athabasca University, Canada Program Committee Co-Chairs * Mark van den Brand, TU Eindhoven, The Netherlands * Jeff Gray, University of Alabama at Birmingham, USA Program Committee * Colin Atkinson, Universität Mannheim, Germany * Don Batory, University of Texas at Austin, USA * Paulo Borba, Universidade Federal de Pernambuco, Brazil * John Boyland, University of Wisconsin, Milwaukee, USA * Marco Brambilla, Politecnico di Milano, Italy * Shigeru Chiba, Tokyo Institute of Technology, Japan * Charles Consel, LaBRI / INRIA, France * Gregor Engels, Universität Paderborn, Germany * Stephen A. Edwards, Columbia University, USA * Robert Fuhrer, IBM T.J. Watson Research, USA * Martin Gogolla, University of Bremen, Germany * Giancarlo Guizzardi, Federal University of Espírito Santo, Brazil * Reiko Heckel, University of Leicester, UK * Frédéric Jouault, INRIA & Ecole des Mines de Nantes, France * Nicholas Kraft, University of Alabama, USA * Thomas Kühne, Victoria University of Wellington, New Zealand * Julia Lawall, University of Copenhagen, Denmark * Timothy Lethbridge, University Ottawa, Canada * Brian Malloy, Clemson University, USA * Kim Mens, Université catholique de Louvain, Belgium * Marjan Mernik, University of Maribor, Slovenia * Todd Millstein, University of California, Los Angeles, USA * Pierre-Etienne Moreau, INRIA Nancy - Grand Est, France * Pierre-Alain Muller, University of Haute-Alsace, France * Daniel Oberle, SAP Research, Germany * Richard Paige, University of York, UK * James Power, National University of Ireland, Ireland * João Saraiva, Universidade do Minho, Portugal * Mary Lou Soffa, University of Virginia, USA * Juha-Pekka Tolvanen, MetaCase, Finland * Alexander Serebrenik, Eindhoven University of Technology, Netherlands * Tony Sloane, Macquarie University, Australia * Steffen Staab, Universität Koblenz-Landau, Germany * Jun Suzuki, University of Massachusetts, Boston, USA * Walid Taha, Rice University, USA * Eli Tilevich, Virginia Tech, USA * Jurgen Vinju, CWI, Netherlands * Eelco Visser, Delft University of Technology, Netherlands * René Witte, Concordia University, Canada Organization Committee * Bardia Mohabbati, Simon Fraser University, Canada (Web Chair) * Alexander Serebrenik, TU Eindhoven, The Netherlands (Publicity co-Chair) * James Hill, Vanderbilt University, USA (Publicity co-Chair)

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Helpful libraries to implement a board game?
by Frank Rosemeier 19 Apr '09

19 Apr '09

Dear Haskellers, I would like to implement a board game for a single player in Haskell. The pieces may be moved one step in any direction if there is no piece next to it, and the goal is to rearrange the pieces to their home positions. The Haskell program should find an optimal solution (with minimal number of moves). Can anybody recommend some helpful libraries for this task? Any hints are very welcome! Frank Rosemeier

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TYPES 2009
by Christophe Raffalli 19 Apr '09

19 Apr '09

Dear list members, Tomorow Monday is the last day to register on the TYPES 2009 website if you want to pay reduced fee. Later registration is still possible and talk submission to. We will probably (as every year) publish post proceedings with good referee. The TYPES workshop cover theory ptractice and application of type theory. More detail and registration on the website http://www.lama.univ-savoie.fr/types09. Yours sincerely, The organizing commitee.

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ANN: persistent-map-0.0.0
by Peter Robinson 19 Apr '09

19 Apr '09

The persistent-map package [1] provides a thread-safe (STM) frontend for finite map types together with a backend interface for persistent storage. The TMap data type is thread-safe, since all access functions run inside an STM monad . Any type that is an instance of Data.Edison.Assoc.FiniteMapX (see EdisonAPI) can be used as a map type. If a TMap is modified within an STM transaction, a corresponding backend IO-request is added using the onCommit hook (cf. stm-io-hooks package). To ensure consistency, the (Adv)STM monad runs these requests iff the transaction commits. Additional backends (e.g. HDBC) can be added by instantiating class Backend. Cheers, Peter [1] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/persistent-map

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Announce: A pragmatic Haskell .NET interop layer, 0.4.0
by Sigbjorn Finne 18 Apr '09

18 Apr '09

A new version of a Haskell .NET interop layer, hs-dotnet, has just been released and is now available for download, http://haskell.forkIO.com/dotnet It lets you access .NET functionality from Haskell and vice versa. Tool support is included in this release to aid such interop. The new version includes development done since the start of the year. Apart from rewriting the internals completely to put it all on a sounder footing, this release includes proper support for .NET generic types (classes and interfaces), mapping them naturally on to Haskell parameterized types. The support for generics enables for instance mixed Haskell-.NET LINQ programming; see the distribution for examples of this along with some other interesting applications of the hs-dotnet interop layer. enjoy --sigbjorn

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Re: Hi-res/vector version of logo?
by Jared Updike 18 Apr '09

18 Apr '09

LOGO VARIATION GENERATOR With some encouragement and feedback from Jeff Wheeler and Eelco Lempsink, I created a "Polymorphic" SVG Haskell Logo in Haskell [1]. This script yields a pile of SVG files and an HTML index showing them off (known to work in Safari 3.0 and Firefox 2.0) [1]: https://dl.getdropbox.com/u/143480/Haskell-logo/svg-test.html The above Logo.hs program (or small tweaks to it) should hopefully yield all of the variations of the Winning Logo that Jeff Wheeler posted [2] with one caveat: no text/fonts/the word "Haskell". (Note that I am not advocating that all of these designs be voted on, only showing what variations have been dreamt up thus far... Keep reading for my own design submission.) FINAL VARIATION VOTING Eelco Lempsink agreed with me that getting the community to pin down just the icon/emblem part of the logo (for use on the Haskell wiki, Wikipedia article on Haskell, Haskell reddit, derivative logos, etc.) would be enough work, and better than trying to vote simultaneously on an emblem design AND an official Haskell font presentation. What do people think of this idea? (If folks still feel the need for an official "Haskell" font we could always work out pairing text with the winner of the Logo Variation vote... but I say we worry about this later.) In addition, Eelco said: > I think letting people submit only one entry might be a good > way to limit the options and prevent us from having an exhaustive search in > the design space ;) I agree, and in the spirit of collaboration I am turning my design variation generator program (Logo.hs above) over to the community (public domain, as Jeff Wheeler has done with his winning logo designs) to hack on in the hopes that we will see some nice designs come out of this. If we get enough entries (n >= 2) we can set up a vote for the Final Logo Variation and revitalize the Haskell home page. [3] ONE POSSIBLE DESIGN In the spirit of competition, I created my own take on the purple/teal Haskell logo. (Note that this variation started as output from my program to which I manually added effects in Inkscape; it was not generated by my software, although it could be....) Unfortunately browsers are not as advanced at rendering SVG as Inkscape so I am submitting PNGs (which we probably want in the end, anyway) of my entry: https://dl.getdropbox.com/u/143480/Haskell-logo/pngs.html as well as the original Inkscape SVG [4] in the hopes that it will inspire others to submit better variations with different effects---but remember: please only submit a single entry of your best idea. All of these logo variations have sort of melted my brain but I hope the community is still excited to settle on a final logo variation once we see some design offerings. Feedback is appreciated, and thanks to everyone who has contributed designs so far. [5] Jared. [1] The Logo Variation Generator: https://dl.getdropbox.com/u/143480/Haskell-logo/Logo.hs I am willing to clean this code up and package it for Hackage, as well as add support for PDF (through Asymptote), if the winning variation is based on this code and the community wants a go-to Haskell-Logo package. [2] http://media.nokrev.com/junk/haskell-logos/ [3] Simulation Haskell.org: https://dl.getdropbox.com/u/143480/Haskell-logo/hask.html Simulation Wikipedia article: https://dl.getdropbox.com/u/143480/Haskell-logo/wikipedia-hask.html [4] Warning: the drop shadow looks terrible in browsers (Load in Inkscape): https://dl.getdropbox.com/u/143480/Haskell-logo/inkscape3-normal-partround-… [5] Brian Sniffen (MetaPost): http://evenmere.org/~bts/haskell-logo/ Don Stewart (SVG): http://galois.com/~dons/images/logos/logo-bezier.svg Philip Hölzenspies: (TeX logo!): http://wwwhome.cs.utwente.nl/~holzensp/haskelllogo.sty Darrin Thompson (ASCII): http://www.ultraviolet.org/mail-archives/haskell-cafe.2008/msg14574.html and everyone who shared their ideas freely...

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