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From: Charles Hixson <charleshixsn@earthlink.net>
Subject: Re: Module size (was Re: Software landmines)
Date: 1998/09/06
Message-ID: <35F2E492.F38508F4@earthlink.net>#1/1
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References: <6snlos$bh6$1@hirame.wwa.com> <904912650snz@nezumi.demon.co.uk>
 <35EFFB78.21BBBED6@ksc.nasa.gov> <35F022A5.1D54E53C@ac3i.dseg.ti.com>
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X-ELN-Date: Sun Sep  6 12:34:59 1998
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Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.lang.ada
Date: 1998-09-06T00:00:00+00:00
List-Id: <comp.lang.ada>

Eiffel deferred classes usually have pre- and post-condition (and the
methods frequently do), and may have invariants, so they aren't really
equivalent to C++ pure virtual member functions.

John G. Volan wrote:
...
> 
> What about abstract methods (C++ pure virtual member functions; Eiffel
> deferred features)?  Those don't have any "lines of code", if by that
> you mean executable statements.  But being able to write abstract
> classes is a crucial part of the O-O method.
> 
> --
> indexing
>    description: "Signatures for John Volan"
>    self_plug: "Ex Ada guru", "Java 1.1 Certified", "Eiffelist wannabe"
>    two_cents: "Java would be even cooler with Eiffel's generics, %
>               %assertions/DBC, true MI, feature adaptation, %
>               %selective export, uniform access, etc., etc..."
> class JOHN_VOLAN_SIGNATURE inherit SIGNATURE invariant
>    disclaimer: not (opinion implies employer.opinion)
> end -- class JOHN_VOLAN_SIGNATURE