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From: <adaworks@sbcglobal.net>
Subject: Re: Type safety, C++ and code generation
Date: Sun, 30 Apr 2006 14:40:20 GMT
Date: 2006-04-30T14:40:20+00:00	[thread overview]
Message-ID: <o%35g.64094$_S7.49734@newssvr14.news.prodigy.com> (raw)
In-Reply-To: e2qn8t$n13$1@sunnews.cern.ch


"Maciej Sobczak" <no.spam@no.spam.com> wrote in message 
news:e2qn8t$n13$1@sunnews.cern.ch...
>
> What about making different types really distinct?
>
> typedef ranged_type<int, 0, 100> R1;
> typedef ranged_type<int, 0, 100> R2;
> typedef ranged_type<int, 0, 101> R3;
>
>
> Above, R1 and R2 are *equal* to the compiler, but R3 is distinct from the 
> other two.
This example raises the issue of structural equivalence versus
name equivalence.  In Ada R1 and R2 would not be
equivalent.

Ada is designed for name equivalence.    Most other languages
are designed for structural equivalence.    In this respect, Ada
continues to be just a wee bit more type safe than languages
designed for structural equivalence.

Richard Riehle 





  parent reply	other threads:[~2006-04-30 14:40 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-27 10:35 Type safety, C++ and code generation Maciej Sobczak
2006-04-27 13:19 ` REH
2006-04-27 14:08   ` Maciej Sobczak
2006-04-27 14:33     ` REH
2006-04-27 15:16       ` Maciej Sobczak
2006-04-27 15:39         ` Georg Bauhaus
2006-04-28  5:57           ` Maciej Sobczak
2006-04-28 12:16             ` Georg Bauhaus
2006-04-28 12:37               ` brian.b.mcguinness
2006-04-28 17:04                 ` Georg Bauhaus
2006-04-28 18:50                 ` Jeffrey R. Carter
2006-04-28 19:07                   ` Randy Brukardt
2006-04-28 19:46                     ` Robert A Duff
2006-04-28 19:55                   ` Dmitry A. Kazakov
2006-04-29 21:28               ` Florian Weimer
2006-04-27 16:05         ` REH
2006-04-28  6:17           ` Maciej Sobczak
2006-04-30 14:40         ` adaworks [this message]
2006-04-30 15:23           ` REH
2006-04-30 18:14         ` Martin Krischik
2006-05-02  6:27           ` Maciej Sobczak
2006-05-02 13:33             ` REH
2006-05-02 15:05               ` Maciej Sobczak
2006-05-02 15:54                 ` REH
2006-05-02 16:50               ` Martin Krischik
2006-05-02 19:50                 ` REH
2006-04-27 14:47     ` REH
2006-04-27 15:10     ` REH
2006-04-28  6:22       ` Maciej Sobczak
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