package ppxlib

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val createf : loc:t -> ('a, Caml.Format.formatter, Base.Unit.t, t) format4 -> 'a
val message : t -> Base.String.t
val set_message : t -> Base.String.t -> t
val register_error_of_exn : (Base.Exn.t -> t Base.Option.t) -> Base.Unit.t

Register an exception handler. Exception registered this way will be properly displayed by report_exception.

val of_exn : Base.Exn.t -> t Base.Option.t

Convert an error to an extension point. The compiler recognizes this and displays the error properly.


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