Welcome to issue 73 of HWN, a newsletter covering developments in the Haskell community.

The Google Summer of Code is in full swing, preparations are underway for ICFP and the eleventh ICFP Programming Contest, and cabal-install is oh-so-sexy. It's an exciting time to be a part of the Haskell community!

Community News

Andy Gill has completed his move from Portland, OR to Kansas.

Luke Palmer (luqui) has begun work for Anygma, Peter Verswyvelen's startup using Haskell (among other languages) to ``generate easy-to-use tools for creating audio-visual 2D/3D content.''

Congrats to Andy and Luke on their new beginnings!


Final CFP: 2008 Haskell Symposium. Andy Gill announced the final call for papers for the 2008 Haskell Symposium. The deadline is the 23rd of this month; please submit a paper!

cabal-install. Duncan Coutts announced the release of cabal-install-0.5, along with the release of Cabal-1.4 to support it. It features an improved command line interface, smarter upgrading, and is made of win. If you are still stuck in the dark ages of runhaskell Setup configure blah blah, then the imperative monkeys have already won.

ICFP programming contest. Tim Chevalier announced the eleventh annual ICFP programming contest, to be held from Friday, July 11, 2008 to Monday, July 14, 2008. Are you ready?

c.h.o trac. Ian Lynagh announced that it is now possible for projects on community.haskell.org to create themselves a trac, providing a bug tracking system and wiki.

random-access-list. Stephan Friedrichs announced an implementation of Chris Okasaki's random-access lists, providing typical list operations (cons, head, tail) in O(1) and indexed random-access in O(log n).

GHC version 6.8.3. Ian Lynagh announced a new patchlevel release of GHC, containing a number of bugfixes relative to 6.8.2.

Printf-TH. Marc Weber announced that he has taken over maintenance of the Printf-TH library, which implements a printf function via Template Haskell, in order to guarantee that wrong argument types or the wrong number of arguments will result in compile time errors.

Mueval. Gwern Branwen announced the release of the mueval package, providing a standalone executable for evaluating Haskell expressions based on the GHC API.

Topkata. Christoph Bauer announced the release of Topkata, a simple OpenGL game written in Haskell. The goal is to guide a ball through a labyrinth to the opposite corner.

Haddock Trac. David Waern announced a new bug-tracker and wiki for the Haddock project.

Fortress talk. Jeff Polakow announced that a talk on Fortress, a new OO/functional language from Sun, will take place on Wednesday, June 25 at 6:30pm in Manhattan, New York, USA.

ieee-0.2. Patrick Perry announced the release of ieee, a library that provides approximate comparison of floating point numbers based, NaN-aware minimum and maximum, and a type class for approximate comparisons.

Google Summer of Code

Hoogle 4. Neil Mitchell (ndm) is working on Hoogle 4, recently adding support for generating Hoogle databases to Haddock, using the GHC API. This week he plans to work on database creation and text searches.

DPH physics engine. Roman Cheplyaka (Feuerbach) is working on a physics engine using Data Parallel Haskell, recently adding rotations, represented by quaternions. Next he plans to handle collisions properly with respect to rotation, and to add documentation.

Generic tries. Jamie Brandon is writing a library for efficient maps using generalized tries. He has come up with a preliminary API and is asking for feedback.

Cabal dependency framework. Andrea Vezzosi (Saizan) is working on a make-like dependency analysis framework for Cabal, recently refining the core model, that has built its first sources in the testing environment. The next step will be dealing with preprocessor chaining.

Language.C. Benedikt Huber (visq) is working on Language.C, a standalone parser/pretty printer library for C99. The test suite is finished, the parser and pretty printer support most GNU extensions, and all failing tests of gcc.dg are documented.

GHC API. Thomas Schilling (nominolo) is working on improvements to the GHC API.

GHC plugins. Maximilian Conroy Bolingbroke is working on dynamically loaded plugins for GHC.


Low-level array performance. Dan Doel began a discussion about the fannkuch benchmark and the current state of Haskell support for fast low-level array operations.

1/0. Evan Laforge began a lively discussion about Infinity, NaN, and Haskell's support for the IEEE floating-point standard.

Documenting the impossible. Andrew Coppin began a discussion on the relative merits of {-# IMPOSSIBLE #-} pragmas, calls to 'error' and 'assert', the use of tools like Catch, and other methods of annotating impossible cases.

Blog noise

Haskell news from the blogosphere.

Quotes of the Week

About the Haskell Weekly News

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