# Module Attr_helper

    module Attr_helper: sig .. end

Helpers for attributes

Warning: this module is unstable and part of compiler-libs.

    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