The ghc-vis package

[Tags: bsd3, library]

Visualize live data structures in GHCi. Evaluation is not forced and you can interact with the visualized data structures. This allows seeing Haskell's lazy evaluation and sharing in action.

See for the basic usage of ghc-vis or watch a short video demonstrating how it can be used with GHCi's debugger:


Versions0.1, 0.2, 0.2.1, 0.3, 0.3.1,, 0.3.2, 0.4, 0.5, 0.6, 0.6.1,, 0.7,, 0.7.1, 0.7.2,,,,,,,
Change logNone available
Dependenciesbase (>=4.5 && <4.7), cairo (==0.12.*), containers (>=0.4 && <0.6), deepseq (==1.3.*), fgl (==5.4.*), ghc-heap-view (==0.5.*), graphviz (==2999.16.*), gtk (==0.12.*), mtl (>=2.0 && <2.2), svgcairo (==0.12.*), text (==0.11.*), transformers (==0.3.*), xdot (==0.2.*)
CopyrightDennis Felsing 2012-2013
AuthorDennis Felsing, Joachim Breitner
MaintainerDennis Felsing <>
CategoryGHC, Debug, Development
Home page
Source repositoryhead: git clone git://
UploadedSun Jun 9 22:22:07 UTC 2013 by DennisFelsing
Downloads3291 total (218 in last 30 days)
StatusDocs uploaded by user
Build status unknown [no reports yet]




graph"Enable graph view using Graphviz"Enabled
full"Full ghc-vis window: decorations, buttons, legend"Enabled

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


Maintainers' corner

For package maintainers and hackage trustees