module Interval_set:sig..end
type 'a t
val sexp_of_t : ('a -> Std_internal.Sexp.t) -> 'a t -> Std_internal.Sexp.tval t_of_sexp : (Std_internal.Sexp.t -> 'a) -> Std_internal.Sexp.t -> 'a tval create : ('a * 'a) list -> 'a tval contains : 'a t -> 'a -> boolval contains_set : container:'a t -> contained:'a t -> boolval ubound : 'a t -> 'aval lbound : 'a t -> 'a