Data.Combinators.TH

Documentation

makeCombinator :: Name -> Q [Dec]

Build a special combinator given a data type name. e.g.

-- List type
data List a = Nil | List a (List a)

makeBaseFunctor ''List

makeCombinator ''ListF

This example will generate the following code:

makeCombinator ''ListF
 ======>
  listf f_acw7 f_acw8 Nil = f_acw7 ()
  listf f_acw7 f_acw8 (Cons a_acw9 a_acwa) = f_acw8 (a_acw9, a_acwa)