Hi, I've just released hs2dot on hackagedb. It's a small tool that lets you automatically generate graphviz/dot code that visualize the relations between data types, types and type classes. Example usage:
hs2dot Hack.hs | dot -T pdf -o Hack.pdf
Multiple files can be analyzed together as in
hs2dot Foo.hs Bar.hs | dot -T png -o FooBar.png
so their data types can point to each other. Example diagrams generated using h2dot can be found at http://github.com/finnsson/hs2graphviz/tree/master/Examples/ Examples of real code analyzed: http://github.com/finnsson/hs2graphviz/raw/master/Examples/Control.pdf (from hpage) http://github.com/finnsson/hs2graphviz/raw/master/Examples/Hack.png (from Hack) Example of mock code analyzed: http://github.com/finnsson/hs2graphviz/raw/master/Examples/TestCode.pdf (three files analyzed together) The tool is still far from complete. Better handling of algebraic data types and instance declarations are a must. GADTs, data families and type synonym families are not yet implemented so they wont turn up. -- Oscar