Haskell Weekly News: March 20, 2006

Submitted by dons on Sun, 03/19/2006 - 8:55pm.

Haskell Weekly News: March 20, 2006

Greetings, and thanks for reading issue 29 of HWN, a weekly newsletter covering developments in the Haskell community. Each Monday, new editions are posted to the Haskell mailing list and to The Haskell Sequence. RSS is also available.


  • lhs2TeX version 1.11. Andres Loeh announced lhs2TeX version 1.11, a preprocessor to generate LaTeX code from literate Haskell sources.

    lhs2TeX includes the following features:

    • Highly customized output.
    • Liberal parser -- no restriction to Haskell 98.
    • Generate multiple versions of a program or document from a single source.
    • Active documents: call Haskell to generate parts of the document (useful for papers on Haskell).
    • A manual explaining all the important aspects of lhs2TeX.


This section covers activity on Haskell'.


  • Deep Functors. Oleg Kiselyov described an fmap over arbitrarily deep `collections': lists of maybes of maps of IOs, etc. -- arbitrarily nested fmappable things.

  • GHC 6.4.2. Simon Marlow put out a heads up for the forthcoming 6.4.2 release of GHC. The rough timescale is to go into release candidate testing in about a week, and have two weeks of release candidates before the final release.

  • Hexdump. Dominic Steinitz mentioned a "hexdump" function he'd written, posing a question about where it would live in the module hierarchy..

Quote of the Week

ihope :: My factorial function uses GADTs.

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