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Helpers for attributes

type error = | Multiple_attributes of string | No_payload_expected of string

val get_no_payload_attribute : string list -> Parsetree.attributes -> string Asttypes.loc option

The string list argument of the following functions is a list of alternative names for the attribute we are looking for. For instance:

["foo"; ocaml.foo ]

val has_no_payload_attribute : string list -> Parsetree.attributes -> bool

exception Error of Location.t * error

val report_error : Format.formatter -> error -> unit