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From: johnson@cs.uiuc.EDU (Ralph Johnson)
Newsgroups: comp.object,comp.lang.ada
Subject: Re: ada-c++ productivity
Message-ID: <1991Mar16.190249.14526@m.cs.uiuc.edu>
Date: 16 Mar 91 19:02:49 GMT
References: <1991Mar10.151220.2581@forwiss.uni-passau.de> <11966@pasteur.Berkeley.EDU> <EACHUS.91Mar14190050@aries.mitre.org> <1991Mar15.224626.27077@aero.org>
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|> Language	Inheritance	DynamicBnd'g	Type[T]	Except.	Task 	LibMgr
|> Smalltalk	yes-SI/class	yes-tlu		no	no	no	?

The latest versions of Smalltalk-80 from ParcPlace (ObjectWorks for
Smalltalk 2.5 and 4.0) have exceptions.  Smalltalk-80 has always had
processes and semaphores, but the user interface was not compatible
with running things in the background until 4.0.  I know, because I
hacked the user interface to make background processes useful.

There have been several versions of Smalltalk-80 that had multiple
inheritance, but the Smalltalk implementors never cared for it very
much so it is not well supported and probably isn't in the ParcPlace
official versions.

Last, but not least, I'm implementing (more accurately, my students
are implementing) a type system for Smalltalk, so someday that column
may change, too.

Ralph Johnson -- University of Illinois at Urbana-Champaign