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