tilia-0.1.1.0: corpora/vendored/other/cpp/haddock-after-a-conditional-holding-a-class-head-out.hs

{-# LANGUAGE CPP #-}
{-# LANGUAGE TypeFamilies #-}

module Test.Example where

-- A method's Haddock and signature written once, after a conditional that
-- holds the head of the class in each branch.
class
#ifdef ENABLE_HOOK_ARGS
  Example e where
  type Arg e
#else
  Example e where
#endif

  -- | Evaluates an example.
  evaluate :: e -> IO Bool