I see this comment at the beginning of streams.ml:

(* The fields of type t are not mutable to preserve polymorphism of
   the empty stream. This is type safe because the empty stream is never
   patched. *)

Is this still true?  I can easily imagine that it used to be true if
and when OCAML had weak type variables, but it doesn't anymore.

If it isn't true any more, then I think it would be possible to make a version
of streams that's as fast and functional as what's there now, and it
would allow consing streams to interoperate properly with streams
derived from functions or channels.

-- 
Tim Freeman       
tim@fungible.com
GPG public key fingerprint ECDF 46F8 3B80 BB9E 575D  7180 76DF FE00 34B1 5C78 
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