`sig
type ('f, 's) t = ('f, 's) t = First of 'f | Second of 's
val map :
('a1, 'a2) t -> f1:('a1 -> 'b1) -> f2:('a2 -> 'b2) -> ('b1, 'b2) t
val t_of_sexp :
(Sexplib.Sexp.t -> 'a1) ->
(Sexplib.Sexp.t -> 'a2) -> Sexplib.Sexp.t -> ('a1, 'a2) t
val sexp_of_t :
('a1 -> Sexplib.Sexp.t) ->
('a2 -> Sexplib.Sexp.t) -> ('a1, 'a2) t -> Sexplib.Sexp.t
val compare :
('a1 -> 'a1 -> int) ->
('a2 -> 'a2 -> int) -> ('a1, 'a2) t -> ('a1, 'a2) t -> int
val bin_t :
'a1 Bin_prot.Type_class.t ->
'a2 Bin_prot.Type_class.t -> ('a1, 'a2) t Bin_prot.Type_class.t
val bin_read_t :
'a1 Bin_prot.Read.reader ->
'a2 Bin_prot.Read.reader -> ('a1, 'a2) t Bin_prot.Read.reader
val __bin_read_t__ :
'a1 Bin_prot.Read.reader ->
'a2 Bin_prot.Read.reader -> (int -> ('a1, 'a2) t) Bin_prot.Read.reader
val bin_reader_t :
'a1 Bin_prot.Type_class.reader ->
'a2 Bin_prot.Type_class.reader -> ('a1, 'a2) t Bin_prot.Type_class.reader
val bin_size_t :
'a1 Bin_prot.Size.sizer ->
'a2 Bin_prot.Size.sizer -> ('a1, 'a2) t Bin_prot.Size.sizer
val bin_write_t :
'a1 Bin_prot.Write.writer ->
'a2 Bin_prot.Write.writer -> ('a1, 'a2) t Bin_prot.Write.writer
val bin_writer_t :
'a1 Bin_prot.Type_class.writer ->
'a2 Bin_prot.Type_class.writer -> ('a1, 'a2) t Bin_prot.Type_class.writer
end`