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From: Ken Garlington <kennieg@flash.net>
Subject: Re: Design by Contract
Date: 1997/09/02
Message-ID: <340CA8E5.2A6A@flash.net>#1/1
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References: <33E9ADE9.4709@flash.net> <EEsF5y.F5H@syd.csa.com.au>
 <34023BC4.2781E494@eiffel.com> <3402d123.0@news.uni-ulm.de>
 <3402DA6A.C4444E46@calfp.co.uk> <3402e51d.0@news.uni-ulm.de>
 <3402E8C9.3384D976@calfp.co.uk> <dewar.872631036@merv>
 <34050F3C.5A3A@invest.amp.com.au> <dewar.872791797@merv>
 <5u61qa$e23$6@miranda.gmrc.gecm.com> <dewar.872887402@merv>
Organization: Flashnet Communications, http://www.flash.net
Reply-To: Ken.Garlington@computer.org
Newsgroups: comp.object,comp.software-eng,comp.lang.ada,comp.lang.eiffel
Date: 1997-09-02T00:00:00+00:00
List-Id: <comp.lang.ada>


Robert Dewar wrote:
> 
> Can we hear from someone who has used Eiffel with, say, either Clearcase
> or Continuus, and has cleanly solved the problem of giving different
> access rights for spec and implementation changes.

I can't speak for those cases, but with PCMS you can distinguish between
files
that represent a spec (either Eiffel or Ada) and those that represent a
body.
Furthermore, you can define different "life cycles" (who gets to do what
to each
file at a given time) for each type of object.

Personally, given that you can (a) mimic Ada specs in Eiffel with
deferred classes,
(b) mimic Eiffel combined specs/bodies in Ada with a decent editor (and,
in the case
of GNAT, with gnatchop), and (c) mix and match deferred and concrete
operations
in both languages, I don't see a huge difference between the two
languages in this
area. Bad CM will defeat either language's approach...