I noticed that there's a lot of places in xmonad and xmonad-contrib where we have manually-namespaced, monomorphic default values (especially for configurations and such things). The data-default package was designed for this, so I've drawn up a patch to use it. I've included two patch bundles, one for the xmonad repository, and one for the xmonad-contrib repository. (Technically, I have enough permissions to apply the xmonad-contrib ones myself; but I wanted to invite some review.) The bundle for -contrib includes three patches, in roughly increasing order of pervasiveness: 1. the minimal change to make things compile with the -core patch 2. a patch which eliminates all references to defaultConfig (including in the documentation) 3. a patch that uses data-default for things like defaultXPConfig, defaultPP, and similar things I've done my best to: * maintain backwards compatibility. Configs that use these symbols should generate a warning, but still work perfectly correctly. * ensure that all the places that used to export default values now also export "def", so that working configs can eliminate the warnings without changing their imports (or at worst change imports of defaultXPConfig, etc. to imports of def) Enjoy! ~d