Neil Mitchell schrieb:
Hi Henning,
Uniplate might be the answer you are looking for - http://community.haskell.org/~ndm/uniplate
Thanks for the pointer!
Uniplate is simple (only multi parameter type classes, and even then only in a very simple usage), fast (one of the fastest generics libraries) and concise (probably the most concise generics library). It's also not as powerful as most of the other generics libraries, but I find it does about 98% of the generics tasks I need. Uniplate is used extensively in virtually all my tools, for example HLint.
Must a package import Uniplate, if it uses Uniplate generics, or is it a preprocessor like I sketched?
As an example, I guess your function returns all the Int's embedded within a data type, at any level? I abstracted the Bin example from GHC's generic extension introduction:
http://www.haskell.org/ghc/docs/latest/html/users_guide/generic-classes.html