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From: ncm@nospam.cantrip.org (Nathan Myers)
Subject: Re: Inheritance and template with g++ and eg++
Date: 1999/01/19
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Helene Prieto<hprieto@sophia.inria.fr> wrote:
>
>I have some problems with inheritance and template...
>Here is my code :
>
>	#include <iostream.h>
>	#define VIEW(a,B) (*static_cast<B*>(&a))
>	#define $VIEW(T,C) C<T>
>	#define $CATEGORY(S) template<class T> struct S
>
>	$CATEGORY(S) { };
>	struct VOID {};
>
>	template<class T> void Prt($VIEW(T,S) & p) { VIEW(p,T).print(); }

This is bad code.  Expanding the macros (why use them, if they
cause confusion?), we have

	template<class T> void Prt(S<T> & p) { T<p>.print(); }

"T<p>" is meaningless.  (Maybe you should go down the hall and visit 
Gabriel Dos Reis, also at INRIA.)  I haven't looked at the rest of
the code posted, there may be other problems in it.

-- 
Nathan Myers
ncm@nospam.cantrip.org  http://www.cantrip.org/



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