module Flags implements Unix-style sets of flags that are represented as
an int with various bits set, one bit for each flag. E.g. Linux_ext.Epoll.Flag.
Flags defines a module type Flags.S, the interface for a flags, and a functor
Flags.Make for creating a flags implementation.
module Int63 = Core_kernel__.Core_int63module type S : sig ... endmodule type S is the interface for a set of flags. Values of type t are set of
flags, and the various functions operate on sets of flags. There is a finite universe
of flags (in particular 63 flags, one for each bit).
module type Make_arg : sig ... endmodule type Flags : sig ... end