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Date: Wed, 09 Mar 2005 18:00:07 +0100
From: Georg Bauhaus <bauhaus@futureapps.de>
Organization: future apps GmbH
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Newsgroups: comp.lang.ada,comp.lang.c++,comp.realtime,comp.software-eng
Subject: Re: Teaching new tricks to an old dog (C++ -->Ada)
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Date: 2005-03-09T17:58:25+01:00
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Pascal Obry wrote:
> Georg Bauhaus <bauhaus@futureapps.de> writes:
> 
> 
>>>Can templates recurse?
>>
>>No. (Though you can mix recursive subprograms, nesting, and template
>>instantiation.)
> 
> 
> Hum, since you answered "no" and I answered "yes" it seems there is something
> about "templates recurse" that I did not understand. In short what is a
> recursive template in C++ ?

In Ada, you cannot instantiate a generic within itself (as Marius
has said elsewhere). In C++, you can, and you should provide
termination lest the instantiation loop exhausts something (at
link time, I believe):

template<typename T> 
struct G {
  G<G> r;
};

Georg