Magicloud Magiclouds
If this was in ruby or other languages that support reflection, it won't be a question. But in Haskell, could I write a code to list the classes that a type instanced?
In regular Haskell, type information is completely lost after compilation, so you can't recover any of that. There is no run-time type information like in languages with OO inheritance. However, types can choose to provide type information through the Typeable type class (Data.Typeable). Generally you wouldn't want to use it, if you write Haskell properly (i.e. if you don't try to write Ruby in Haskell).
TemplateHaskell as well.
I'm not sure about that one. Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/