From: sbelmont700@gmail.com
Subject: Re: Hash Type Size
Date: Sat, 31 Aug 2013 08:57:32 -0700 (PDT)
Date: 2013-08-31T08:57:32-07:00 [thread overview]
Message-ID: <782ef090-7299-4164-b4e5-14a06d1c1a44@googlegroups.com> (raw)
In-Reply-To: <7aa26916-cde1-46f8-9f49-d9ebcc2dee93@googlegroups.com>
To be honest, this was mostly just laziness on my part; there is no good (read: easy) way to hash an opaque data type, and so a quick and dirty (and admittedly non-ideal) way to simply use the pointer as the key itself. But this is a lot tougher to rationalize now that they are different sizes, so I guess the real question is "what's a good way to hash a private type/access value/system.address?"
It would be nice if there was a interface exclusively for doing this; something like an 'Hash attribute that could be applied to any type to return either a implementation-provided hash (like for strings) or that could be overridden by a programmer in fancier cases. You can already sort of hack it together now using Ada.Strings.Hash(T'Image(o)).
next prev parent reply other threads:[~2013-08-31 15:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-18 21:05 Hash Type Size sbelmont700
2013-08-19 1:03 ` AdaMagica
2013-08-19 22:21 ` Randy Brukardt
2013-08-19 22:29 ` Randy Brukardt
2013-08-19 22:12 ` Randy Brukardt
2013-08-31 6:22 ` Peter Brooks
2013-08-31 15:57 ` sbelmont700 [this message]
2013-09-03 1:47 ` Randy Brukardt
2013-09-03 2:31 ` Peter Brooks
2013-09-03 10:50 ` John B. Matthews
2013-09-03 17:18 ` Peter Brooks
2013-09-03 21:21 ` John B. Matthews
2013-09-04 4:50 ` Paul Rubin
2013-09-04 4:54 ` Paul Rubin
2013-09-05 19:30 ` John B. Matthews
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