From: "Dave Berry" <Dave@kal.com>
>You can drop a version of our
>utilities DLL compiled last night into a distribution from two years
>ago, and your distribution will carry on working as if nothing had
>changed.  So it is possible, even on Microsoft systems, given sufficient
>care on the part of the designers.
>
>What would be nice would be a type system that could ensure this for us.
>There's some opportunities for academic research here, surely?

I proposed a scheme for ensuring type-safety in this situation on this
mailing list yesterday morning, along with a concrete example.  No
replies yet.  The message is in the archives at:

   http://caml.inria.fr/archives/200203/msg00158.html

If you don't want to unpack the sample code from the email, you may
download it from

   http://www.fungible.com/dll-example.tar.gz

This file is only 1418 bytes.
-- 
Tim Freeman       
tim@fungible.com
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