Fellow generic programmers, I finally managed to prepare a new release of SYB. Since this is a widely used library I decided to share a "preview" version here before putting it up on Hackage. There is nothing major in this version: basically, the testsuite was reintegrated and I added some basic generic producers. Please let me know if something goes wrong with this new version: http://code.haskell.org/syb/syb-0.2-rc1.tar.gz The draft announcement follows: syb: Scrap Your Boilerplate!

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Scrap Your Boilerplate (SYB) is a library for generic programming in Haskell. It is supported in the GHC >= 6.0 implementation of Haskell. Using this approach, you can write generic functions such as traversal schemes (e.g., everywhere and everything), as well as generic read, generic show and generic equality (i.e., gread, gshow, and geq). This approach is based on just a few primitives for

type-safe cast and processing constructor applications.

It was originally developed by Ralf Lämmel and Simon Peyton Jones. Since then, many people have contributed with research relating to SYB or its applications.

More information is available on the webpage: http://www.cs.uu.nl/wiki/GenericProgramming/SYB

What's new ----------

The biggest improvements from version 0.1 are: * The reintegration of the testsuite; * The introduction of two new generic producers ('empty' and 'constrs'). The former produces an empty value of a given datatype, while the latter produces a list of values of a datatype, each using a different constructor.

Features --------

* Easy generic programming with combinators

* GHC can derive Data and Typeable instances for your datatypes

* Comes with many useful generic functions

Requirements ------------

* GHC 6.10.1 or later * Cabal 1.2.1 or later

Download --------

With cabal-install:

cabal install syb

Get the package:

http://hackage.haskell.org/package/syb

Get the source:

darcs get http://code.haskell.org/syb/

Bugs & Support --------------

Please report issues or request features at the bug tracker:

http://code.google.com/p/scrapyourboilerplate/issues/list

For discussion about the library with the authors, maintainers, and other interested persons use the mailing list:

http://www.haskell.org/mailman/listinfo/generics

Thanks, Pedro