Re: [Boost-users] Boost-users Digest, Vol 1106, Issue 1

From: craigp (craigp98072_at_[hidden])
Date: 2006-12-04 00:46:22

> Message: 7
> Date: 02 Dec 2006 17:51:00 -0600
> From: Aleksey Gurtovoy <agurtovoy_at_[hidden]>
> Subject: Re: [Boost-users] odd msvc 7.1 compilation errors with mpl
> To: boost-users_at_[hidden]
> Cc: dave_at_[hidden], craigp <craigp98072_at_[hidden]>
> Message-ID: <m2y7pp3li3.fsf_at_[hidden]>
> Content-Type: text/plain; charset=us-ascii
> 
> craigp writes:
> > For some reason, I can't get the IDE to compile BOOST_MPL_ASSERT. I tried
<snip>
 
> This is a known issue: the errors you see are specific to MSVC "Edit &
> Continue" mode, in which the __LINE__ macro (used internally in MPL
> asserts) stops being a preprosessing-time constant and becomes a
> reference to a global run-time variable
> (http://support.microsoft.com/kb/199057). 
> 
> To alleviate this problem, Microsoft has introduced a proprietary
> predefined macro __COUNTER__
> (http://msdn2.microsoft.com/en-us/library/b0084kay.aspx), intended to
> serve as a replacement for __LINE__ in situations where the latter is
> used to generate a unique identifier rather than to actually refer to
> a line number (which is the case with MPL asserts). Unfortunately,
> because __COUNTER__ is incremented every time it's used, fixing this
> is a bit more complicated then just a search & replace for __LINE__,
> and therefore it has to wait for 1.35 (or you can grab the latest
> version of "boost/mpl/assert.hpp" from Boost CVS's HEAD trunk).
> 
> HTH,
> -- 
> Aleksey Gurtovoy
> MetaCommunications Engineering

thanks Aleksey!! works fine now.

cheers,
--craig

 
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