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Source file float_with_finite_only_serialization.ml

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open Ppx_compare_lib.Builtin

module Stable = struct
  open Stable_internal
  module Binable = Binable.Stable

  module V1 = struct
    exception Nan_or_inf [@@deriving sexp]

    type t = float [@@deriving compare, hash, equal]

    let verify t =
      match Caml.classify_float t with
      | FP_normal | FP_subnormal | FP_zero -> ()
      | FP_infinite | FP_nan -> raise Nan_or_inf
    ;;

    include
      Binable.Of_binable.V1 [@alert "-legacy"]
        (Float)
        (struct
          type nonrec t = t

          let of_binable t =
            verify t;
            t
          ;;

          let to_binable t =
            verify t;
            t
          ;;
        end)

    let sexp_of_t = Float.sexp_of_t

    let t_of_sexp = function
      | Sexp.Atom _ as sexp ->
        let t = Float.t_of_sexp sexp in
        (try verify t with
         | e -> Import.of_sexp_error (Import.Exn.to_string e) sexp);
        t
      | s -> Import.of_sexp_error "Decimal.t_of_sexp: Expected Atom, found List" s
    ;;

    let t_sexp_grammar = Float.t_sexp_grammar
  end
end

include Stable.V1
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