From: craig@elaine35.Stanford.EDU (Craig Chambers)
Subject: Re: ada-c++ productivity
Date: 16 Mar 91 00:06:24 GMT [thread overview]
Message-ID: <1991Mar16.000624.2513@leland.Stanford.EDU> (raw)
In-Reply-To: 1991Mar15.224626.27077@aero.org
In article <1991Mar15.224626.27077@aero.org> jordan@aero.org (Larry M. Jordan) writes:
>Language Inheritance DynamicBnd'g Type[T] Except. Task LibMgr
>C++ yes-MI/class yes-vft no[1] no[2] no hand
>Objective-C yes-SI/class yes-tlu no no no hand
>Smalltalk yes-SI/class yes-tlu no no no ?
>SELF yes-MI/object yes-? no no no ?
>TP6.0 yes-SI/class yes-vft no no no auto
>Eiffel yes-MI/class yes-vft yes yes no auto
>Ada yes[3] no no[4] yes yes auto
I'd argue that the mechanism for implementing dynamic binding is not
so important, certainlyt not as important as many of the other
features you list. But if you want to include it, Self's
implementation of dynamic binding is based on hash table lookup with
possible optimizations like in-line caching (also present in the
ParcPlace Smalltalk-80 implementation), static binding, and inlining.
I'd also guess that Eiffel uses tlu instead of vft to implement
dynamic binding.
Both Smalltalk and Self support multiple lightweight communicating
threads within a single address space, so those values should probably
read "yes" (depending on what you mean by "Task").
Also, both Smalltalk and Self implementations are effectively one big
library manager. If you require some sort of separate compilation,
then they don't have it, but if you just want automatic linking and
compilation after programming changes or the ability to invoke code of
objects/classes written by other people, then they are nice
environments.
-- Craig Chambers
P.S. The eariler mention of "Cardelli and Wegner's" definition of OO
should be attributed to just Wegner. Wegner's definitions are overly
narrow and constrained in my view, and I believe that Cardelli would
want to be able to form his own definitions.
next prev parent reply other threads:[~1991-03-16 0:06 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
1991-03-07 16:31 ada-c++ productivity Craig C Johnson
1991-03-08 20:58 ` Jim Showalter
1991-03-10 15:12 ` Joachim Wiese
1991-03-13 23:12 ` Joe Buck
1991-03-15 1:00 ` Robert I. Eachus
1991-03-15 22:46 ` Larry M. Jordan
1991-03-16 0:06 ` Craig Chambers [this message]
1991-03-16 20:52 ` Ted Holden
1991-03-17 8:38 ` MUNTS PHILLIP A
1991-03-17 14:27 ` Ralph Reid III
1991-03-17 20:26 ` csq031
1991-03-18 4:57 ` Michael Feldman
1991-03-18 13:25 ` Matthew S. Granger
1991-03-18 23:17 ` Paul Stachour
1991-03-19 21:17 ` Jim Showalter
1991-03-19 16:14 ` klimas
1991-03-25 22:01 ` Terry J. Westley
1991-03-18 2:12 ` Jim Showalter
1991-03-18 18:13 ` arny.b.engelson
1991-03-19 7:44 ` Jim Showalter
1991-03-18 22:12 ` martin
1991-03-16 19:02 ` Ralph Johnson
1991-03-19 16:40 ` klimas
1991-03-21 3:12 ` Jim Showalter
1991-03-17 0:47 ` Jim Showalter
1991-03-18 23:55 ` adam
1991-03-25 12:42 ` Steven D. Litvinchouk
1991-03-17 0:40 ` Jim Showalter
-- strict thread matches above, loose matches on Subject: below --
1991-03-18 15:27 simonian richard 66449
[not found] <668465900@<jls>
1991-03-20 14:03 ` ryer
1991-03-21 15:26 ` Gary W Smith
1991-03-21 18:50 ` Depriest
1991-03-26 2:32 ` Jim Showalter
1991-03-26 14:57 ` Michael Feldman
1991-03-27 3:09 ` Jim Showalter
1991-03-29 20:30 ` ryer
1991-04-01 14:15 ` Depriest
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