Function haskell_bits::functor::fmap

pub fn fmap<TCon: ?Sized, TIn, TOut, TFunc, TParam>(
    f: TFunc, 
    x: &TParam
) -> <TCon as WithTypeArg<TOut>>::Type where
    TCon: Functor + WithTypeArg<TIn> + WithTypeArg<TOut>,
    TParam: TypeApp<TCon, TIn>,
    TFunc: Fn(&TIn) -> TOut,