(** A named function referenced by a {!Line.t}.

    [Function] in profile.proto. {!field-name}, {!field-system_name} and
    {!field-filename} are string-table indices on the wire; this type carries
    the strings they resolve to. *)

type t = {
  id : int64;
      (** unique, non-zero identifier (profile.proto field 1). [0L] is reserved
          and rejected by {!Profile.validate}. *)
  name : string;
      (** human-readable name (profile.proto field 2), demangled where the
          producer can. *)
  system_name : string;
      (** name as the system knows it (profile.proto field 3), e.g. a C++
          mangled symbol. *)
  filename : string;
      (** source file containing the function (profile.proto field 4). *)
  start_line : int64;
      (** line of the function's first line in {!field-filename} (profile.proto
          field 5), [0L] when unknown. *)
}
(** A function record. *)

val equal : t -> t -> bool
(** [equal a b] is [true] when every member is equal. *)

val pp : t Fmt.t
(** [pp ppf t] prints ["#<id> <name> (<filename>:<start_line>)"]. *)