[boost] Re: ENFORCE

From: Daniel Frey (daniel.frey_at_[hidden])
Date: 2003-05-08 11:16:43

Gennaro Prota wrote:
> On Thu, 8 May 2003 15:06:02 +0300, "John Torjo" <john_at_[hidden]>
> wrote:
> 
>>Unfortunately, we can't use the do-while(0) idiom, since we don't know when
>>while(0) will be ;-)
>>
> 
> Oops, no. That's not the problem. The problem is that I read Daniel's
> reply out of context and too absent-mindedly :-) I thought it was
> something like
> 
>   if (false) ; else
> 
> whereas he is really testing for a condition
> 
>   if(expr)...
> 
> However, if you are going to abort at the end (or throw, but I don't
> want to enter in this matter) you can simply replace 'if' with
> 'while':

But that does not give you any benefit at all, does it? The 
do-while-idiom is very different from the while-version you suggest. 
It's IMHO the only idiom that forces the user to add a semicolon, but we 
actually don't want to do that here. The user should be allowed to add 
(i) or other stuff. I think that the 'if' (or 'while', but that's not a 
difference) is the best we can do here.

Regards, Daniel

-- 
Daniel Frey
aixigo AG - financial training, research and technology
Schloß-Rahe-Straße 15, 52072 Aachen, Germany
fon: [phone], fax: [phone]
eMail: daniel.frey_at_[hidden], web: http://www.aixigo.de