Re: [Boost-users] [bind, regex] strange MSVC 7.1 compiler effect: Members of unnamednamespace are put in boost::re_detail when stdafx.h includesbind.hpp and regex.hpp

From: John Maddock (john_at_[hidden])
Date: 2007-04-25 05:37:56

Stefan Felkel wrote:
> Hi there,
>
> I have a strange compiler effect with Microsoft Visual Studio.NET
> 2003 and boost 1.33.1 in a project that uses bind and regex. All
> Symbols defined in an unnamed namespace are part of the namespace
> boost::re_detail::'anonymous-namespace'. The effect occurres when I
> use precompiled headers and bind.hpp is included before regex.hpp.
>
> This is my stdafx.h which is used to generate the precompiled header:
>
>    #pragma once
>
>    #include <boost/bind.hpp>
>    #include <boost/regex.hpp>
>
> This is the main source file:
>
>    #include "stdafx.h"
>    #include "boost/current_function.hpp"
>
>    namespace {
> void foo( void )
> {
> printf( "%s\n", BOOST_CURRENT_FUNCTION );
> }
>    }
>
>    int main( int argc, char * argv[] )
>    {
> foo();
> return 1;
>    }
>
> The program generates this output:
>
>    void __cdecl boost::re_detail::`anonymous-namespace'::foo(void)
>
> instead of the expected output:
>
>    void __cdecl `anonymous-namespace'::foo(void)
>
> When I change the include order in stdafx.h so that regex.hpp is
> included before bind.hpp the output is as expected.
> Has someone else came across such a problem? Is it a compiler bug?

Weird indeed, I don't believe it's our problem as such: except that both 
regex and bind use unnamed namespaces.  Looks like the poor compiler is 
getting confused :-(

John.