Errors (mlang.Mlang.Errors)

exception StructuredError of string
                   * (string option * Pos.t) list
                   * ( unit -> unit ) option

val format_structured_error : 
  Stdlib.Format.formatter ->
  (string * (string option * Pos.t) list) ->
  unit

val raise_spanned_error : string -> ?span_msg:string -> Pos.t -> 'a

val raise_multispanned_error : string -> (string option * Pos.t) list -> 'a

val raise_error : string -> 'a

val raise_spanned_error_with_continuation : 
  string ->
  ?span_msg:string ->
  Pos.t ->
  ( unit -> unit ) ->
  'a

val print_spanned_warning : string -> ?span_msg:string -> Pos.t -> unit