T10971a.hs

{-# OPTIONS_GHC -Wall #-}
{-# LANGUAGE MonomorphismRestriction, ExtendedDefaultRules #-}
module T10971a where

import Data.Traversable (fmapDefault)

f = \x -> length x
g = \f x -> fmapDefault f x
h = \f x -> (fmapDefault f x, length x)