The bff package

[Tags:library, public-domain]

This is an implementation of the ideas presented in Bidirectionalization for Free! (paper at POPL'09) by Janis Voigtlaender.

It also includes an automatic deriver for the Zippable type class.

Using the cabal flag binaries will enable the creation of a web frontend to bff, in the form of a CGI program. Make sure you understand the security implications before allowing untrusted access to the script.

Using the cabal flag stats will generate programs that collect performance statistics about bff and print them as a table.

Using the cabal flag render will generate a program that renders collected performance statistics as PDF files.


Versions 0.1, 0.2, 0.3, 0.3.1,,
Dependencies base, benchpress (>=, bimap (>=0.2.3), category-extras (>=0.53.5), cgi, Chart (>=0.8), containers, derive (>=0.1.1), directory, haskell98, hint, mtl, template-haskell, unix, utf8-string, xhtml [details]
License PublicDomain
Author Janis Voigtlaender, Joachim Breitner
Maintainer Janis Voigtlaender
Category Data
Uploaded Sun Nov 2 11:55:11 UTC 2008 by JanisVoigtlaender
Distributions NixOS:
Downloads 1496 total (13 in the last 30 days)
0 []
Status Docs not available [build log]
All reported builds failed as of 2017-01-02 [all 7 reports]
Hackage Matrix CI


  • Data
    • Data.Bff
    • Data.IntMapEq
    • Data.IntMapOrd
    • Data.Zippable
  • SimpleTree


binariesBuild the binaries bff-shell and bff-cgiDisabledAutomatic
statsBuild the stats-generating and -printing programsDisabledAutomatic
renderBuild the stats-rendering programDisabledAutomatic

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


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