Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!att!westmark!mole-end!mat
From: mat@mole-end.UUCP (Mark A Terribile)
Newsgroups: comp.lang.c++
Subject: MI-- Direct + Indirect
Message-ID: <414@mole-end.UUCP>
Date: 26 May 90 03:40:49 GMT
Organization: mole-end--private system.  admin: mole-end!newtnews
Lines: 36

Consider the following:

	class	mut_base
	{
		. . .
	};

	class	deriv_1
	 : public mut_base
	{
		. . .
	};

	class	mult_deriv
	 : public deriv_1, public mut_base
	{
		. . .
	};

The AT&T Release 2.0 version I have refuses to accept this, insisting that I
am including a base class twice.  Zortech's 2.06 accepts it.  The Release 2.0
Reference manual states that you may not derive directly twice from the
same base class; it appears that cfront assumes that if I have derived from
it indirectly no direct derivation is possible.

What's the story?  Is AT&T wrong and Walter right?  (I hope so.)  Or is
AT&T right?

As an aside, to the fellows at AT&T: I spoke this week with another C++
programmer who feels the lack of Parameterized Types and feels that MI
will not be fully useful until PT comes along.  Please find time to get
templates into a release!
-- 

 (This man's opinions are his own.)
 From mole-end				Mark Terribile