2009/8/24 Max Desyatov
graphtype was developed to visualise type declarations in you Haskell source files. It produces .dot-file for subsequent processing with graphviz.
Anyway, graphtype is fairly usable. Leave here your questions, suggestions and have fun looking at type dependencies in your code.
Neat. You could probably get some leverage from the GHC API for reading .hi files to find out information about imported types. It looks to me like you generate one image file for the whole graph. It could get quite big. I think dot supports hyperlinks, and so do some image formats (SVG I believe). Maybe you could split it up into pieces with hyperlinks between them. Browser support for SVG appears to be getting better these days. I've sometimes mused about the idea of graphing the static function call graph of programs and annotating arcs with type information. For that the GHC API would be the way to go (might need to do a little type reconstruction along the way to figure out the concrete types at which polymorphic functions are used.) Cheers, Bernie.