RE: [boost] Re: [math constants] C++ Language gurus views needed and Codewarrior & Comeau testers

From: Phil Richards (news_at_[hidden])
Date: 2004-03-01 15:25:35

On Mon, 01 Mar 2004 18:09:20 +0000, Paul A Bristow wrote:
[Daniel Frey said:]
> | I really suggest you look at my code at
> | <http://groups.yahoo.com/group/boost/files/MathConstants/>, which solves
> | all of the above points.
> Except that VC 7.1 doesn't think it is legal C++ :-((
> I think we need to establish if it is correct (as gcc and Intel think it
> is)

Nope, as has been said a number of times, it is not valid C++.  typeof is
not in the existing C++ standard.  It is a very useful extension
implemented by a number of vendors, but that doesn't make it standard.

> Or to find some workaround that VC 7.1 will accept.

Indeed.

> It would be helpful to know what do other highly conformant compilers,
> like CodeWarrior and Comeau, say about Daniel Frey's proposal?

Well, you still have to get over the boost Guidelines saying:
 Aim for ISO Standard C++. Than means making effective use of the standard
 features of the language, and avoiding non-standard compiler extensions.
 It also means using the C++ Standard Library where applicable.

It doesn't forbid using extensions, but I seem to remember David Abrahams
being a little more assertive about not using non-standard extensions :-)

phil
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