From: Jim Weirich <jweirich@...>
Date: 2002-10-17T13:29:26+09:00
Subject: Re: Interfaces in Ruby

On Wed, 2002-10-16 at 22:19, Chris Gehlker wrote:

> I don't agree that an interface, in the Java sense, and an abstract 
> class, in the Java/C++ sense are synonymous 

An abstract class in C++, with all pure virtual methods and no data, is
semantically equivalent to a Java interface[1].  They are often used in
C++ programs in ways similar to Java interfaces.  

[...]
> There are also:
> 3) Idiosyncratic but very clever uses as, for example, in the STL, 
> where it is somewhat obscured by all the template stuff, and in GNUStep 
> where it isn't.

I'm not sure what you are refering to here, but it sounds interesting. 
Examples?

> I'll try and translate my drawing program [with class cluster examples] >
> from ObjC to Ruby.

I, too, am interested in seeing this.

-- 
-- Jim Weirich     jweirich@one.net    http://w3.one.net/~jweirich
---------------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct, 
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)