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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Seeking for papers about tagged types vs access to subprograms
Date: Tue, 14 May 2013 16:00:46 -0400
Organization: The World Public Access UNIX, Brookline, MA
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Date: 2013-05-14T16:00:46-04:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> IMO, RSX and VMS were precursors of type-safe (one could say an OO) file
> system which never came to life.

I'd love to see a type-safe file system.  I've thought a lot about
how to design such a thing, and I don't think it's easy.  Ada types
don't work, because they vanish when the program exits, whereas files
out-live programs.

And I don't see VMS files as being a good basis for that.  If they're
the "precursor" as you say, they are extremely primitive.  And yet
super complicated.

I never used RSX-11.

- Bob