Constraint_constants.Fork_configval to_yojson : t -> Yojson.Safe.tval of_yojson : Yojson.Safe.t -> t Ppx_deriving_yojson_runtime.error_orval _ : Yojson.Safe.t -> t Ppx_deriving_yojson_runtime.error_orval t_of_sexp : Ppx_sexp_conv_lib.Sexp.t -> tval sexp_of_t : t -> Ppx_sexp_conv_lib.Sexp.tval opt_to_yojson : t option -> Yojson.Safe.tval opt_of_yojson : Yojson.Safe.t -> ( t option, string ) Core_kernel._result