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- Newsgroups: comp.lang.eiffel
- Path: sparky!uunet!decwrl!csus.edu!netcom.com!nagle
- From: nagle@netcom.com (John Nagle)
- Subject: Re: system-level validity
- Message-ID: <j-rnhhj.nagle@netcom.com>
- Date: Tue, 08 Sep 92 05:09:18 GMT
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <mod.714411318@cs.man.ac.uk> <714585601snx@holon.demon.co.uk> <mod.714907485@cs.man.ac.uk> <83@feiffel.UUCP> <1bmn50.nagle@netcom.com> <mod.715877622@cs.man.ac.uk>
- Lines: 19
-
- mod@cs.man.ac.uk (Mike O'Docherty (Teaching Company Associate with MU/ICL)) writes:
-
- >nagle@netcom.com (John Nagle) writes:
-
- >> Given system-level validity checking, what strong statements can
- >>one make about a program that passes it?
-
- >I don't know if bland statements such as
-
- > "A system-valid application is *guaranteed* to be type-safe, a
- > class-valid system is not."
-
- >are any use to you. No? Oh, well.
-
- Now the question is, can system-level validity checking be performed
- statically, and has this been successfully implemented? Chapter 22
- seems evasive on this subject.
-
- John Nagle
-