package ppx_deriving

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module Stdlib = Pervasives
val deriver : string
val raise_errorf : ?sub:Ocaml_common.Location.error list -> ?loc:Ppxlib.Location.t -> ('a, unit, string, 'b) Pervasives.format4 -> 'a
val parse_options : (string * Ppxlib.Parsetree.expression) list -> unit
val attr_value : Ppxlib.attributes -> int option
val mappings_of_type : Ppxlib.Parsetree.type_declaration -> [> `Polymorphic | `Regular ] * (int * string Location.loc) list