fold (ppxlib.Ppxlib_traverse

method int : < array : 'a. ('a, 'acc) T.fold -> ('a array, 'acc) T.fold
               ; bool : (bool, 'acc) T.fold
               ; char : (char, 'acc) T.fold
               ; int : (int, 'acc) T.fold
               ; list : 'a. ('a, 'acc) T.fold -> ('a list, 'acc) T.fold
               ; option : 'a. ('a, 'acc) T.fold -> ('a option, 'acc) T.fold
               ; string : (string, 'acc) T.fold.. > ->
  (int, 'acc) T.fold

method string : 'c -> (string, 'acc) T.fold

method bool : 'c -> (bool, 'acc) T.fold

method char : 'c -> (char, 'acc) T.fold

method option : 'c -> 'a. ('a, 'acc) T.fold -> ('a option, 'acc) T.fold

method list : 'c -> 'a. ('a, 'acc) T.fold -> ('a list, 'acc) T.fold

method array : 'c -> 'a. ('a, 'acc) T.fold -> ('a array, 'acc) T.fold