From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Subject: Re: Generics vs. O-O?
Date: Thu, 01 Aug 2013 13:35:57 -0700
Date: 2013-08-01T13:35:57-07:00 [thread overview]
Message-ID: <ktegf4$cqb$1@dont-email.me> (raw)
In-Reply-To: <fdf94891-3258-480d-a203-c157559e928f@googlegroups.com>
On 08/01/2013 01:10 PM, optikos@verizon.net wrote:
>
> Conversely, Ada utilizes a single instance of machine code & static data for
> an Ada generic, regardless of the type parameters passed at compile-time.
> This single instance of machine-code accommodates different type parameters
> by either branching (around different per-type-parameter treatment) or table
> look-up (of the size & structure of entities). No such branching or
> table-lookup is present in the corresponding combinatorial explosion of C++
> template instantiation. This conflation by branching or table look-up in Ada
> is precisely why the combinatorial explosion does not occur in Ada generics,
> as it does in C++ templates.
While Ada generics /can/ be implemented this way (see Janus/Ada for an instance
proof), most Ada compilers do not implement generics this way, but do macro
expansion (see GNAT for an example).
--
Jeff Carter
"I feel as though somebody stepped on my tongue
with muddy feet."
Never Give a Sucker an Even Break
112
next prev parent reply other threads:[~2013-08-01 20:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-01 14:45 Generics vs. O-O? Eryndlia Mavourneen
2013-08-01 19:24 ` Dmitry A. Kazakov
2013-08-01 19:52 ` Eryndlia Mavourneen
2013-08-01 20:14 ` sbelmont700
2013-08-01 23:35 ` Yannick Duchêne (Hibou57)
2013-08-01 20:10 ` optikos
2013-08-01 20:26 ` Dmitry A. Kazakov
2013-08-01 20:35 ` Jeffrey Carter [this message]
2013-08-01 21:22 ` Bill Findlay
2013-08-01 23:38 ` Yannick Duchêne (Hibou57)
2013-08-01 22:20 ` Georg Bauhaus
2013-08-02 8:11 ` Dmitry A. Kazakov
2013-08-02 9:50 ` Georg Bauhaus
2013-08-02 14:09 ` Dmitry A. Kazakov
2013-08-02 15:08 ` Shark8
2013-08-02 15:36 ` Alan Jump
2013-08-02 17:00 ` Jeffrey Carter
2013-08-02 17:51 ` Dmitry A. Kazakov
2013-08-02 18:06 ` Alan Jump
2013-08-02 19:08 ` Dmitry A. Kazakov
2013-08-02 16:15 ` Dmitry A. Kazakov
2013-08-03 0:04 ` Yannick Duchêne (Hibou57)
2013-08-03 7:35 ` Georg Bauhaus
2013-08-03 8:57 ` Dmitry A. Kazakov
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