-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Paul A. Bristow Sent: Friday, October 29, 2010 9:30 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] warnings with VS2008 and Boost 1.44
-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Andrew Holden Sent: Thursday, October 28, 2010 7:17 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] warnings with VS2008 and Boost 1.44
On Thursday, October 28, 2010 11:02 AM, Paul A. Bristow wrote:
-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of gast128 Sent: Thursday, October 28, 2010 3:27 PM To: boost-users@lists.boost.org Subject: [Boost-users] warnings with VS2008 and Boost 1.44
All these warnings look spurious, and I think you can safely enclose and disable push'n'pop, as you suggest.
Fair warning about Visual Studio: according to the help file at http://msdn.microsoft.com/en-us/library/2c8f766e%28v=VS.90%29.aspx>
Limit also applies to VC2010 according to http://msdn.microsoft.com/en-us/library/2c8f766e%28v=VS.100%29.aspx
The compiler only supports up to 56 #pragma warning statements in a compiland.
It is my experience that the compiler will ignore any "#pragma warning" lines after this limit has been reached, and it can be reached a lot faster than you might expect.
I'm sure it will happen easily when using Boost in Real Life. I've updated https://svn.boost.org/trac/boost/wiki/Guidelines/WarningsGuidelines with this information. It means that authors really ought to try to 'fix' warnings like this, rather than using this suppress mechanism. But I fear it means attempts to use warnings as errors globally are doomed to be more trouble than they are worth, mainly because some warnings are spurious (even MS admit this!) and are unlikely to be fixed. http://connect.microsoft.com/VisualStudio/feedback/details/586147/warning-c4 224-is-given-for-correct-code-if-ms-extensions-are-disabled and like the poor, warnings will always be with us :-( Paul
--- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com