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From: Maciej Sobczak <no.spam@no.spam.com>
Newsgroups: comp.lang.ada
Subject: Re: private types
Date: Tue, 21 Mar 2006 08:27:21 +0100
Organization: CERN - European Laboratory for Particle Physics
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Date: 2006-03-21T08:27:21+01:00
List-Id: <comp.lang.ada>

Martin Krischik wrote:

>>NULL is not depreciated. It's defined in the <cstddef> header to be a
>>null-pointer constant, which is any integral const expression that
>>evaluates to 0. Possible definition is:
> 
> But that is only a C compatibility header

No, there is nothing like this in C++. The C library is part of C++ by 
explicit inclusion, not by compatibility.
Consider, for example, general purpose functions, like rand() (this one 
declared in <cstdlib>). It does not make any sense to say that such 
functions are C-compatibility stuff only, because that would imply that 
it's not possible to do even such basic things in "pure" C++.

C++ *contains* the C library. It uses different header names (for 
example, cstdlib instead of stdlib.h) and namespace std (so that you 
have std::rand, std::printf, etc.), but everything is there and 
everything is part of C++. Including NULL.


-- 
Maciej Sobczak : http://www.msobczak.com/
Programming    : http://www.msobczak.com/prog/