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From: preston@titan.rice.edu (Preston Briggs)
Newsgroups: comp.lang.misc
Subject: Re: Languages that allow extensions to classes
Message-ID: <6566@brazos.Rice.edu>
Date: 11 Apr 90 22:43:28 GMT
References: <16560@estelle.udel.EDU>
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In article <16560@estelle.udel.EDU> new@ee.udel.edu (Darren New) writes:

>Does anybody know
>of other languages which allow the user to extend functionality of system
>classes/libraries/etc without changing files where the old stuff is
>defined?

Oberon and Object Oberon can do things like this.

Oberon is reported in Software - Practice and Experience, July, 1988.

Object Oberon is introduced in a paper published in an
issue of Structured Programming (sorry, I'm not sure which, probably in 1989).

Both of these are talked about occasionally in comp.lang.modula2
--
Preston Briggs				looking for the great leap forward
preston@titan.rice.edu