Module Incr.Node_value

type 'a t =
  1. | Invalid
  2. | Necessary_maybe_stale of 'a option
  3. | Unnecessary_maybe_stale of 'a option
val sexp_of_t : ('a -> Ppx_sexp_conv_lib.Sexp.t) -> 'a t -> Ppx_sexp_conv_lib.Sexp.t