Re: [boost] Boost.Signals and Qt

From: Simon Buchan (simon_at_[hidden])
Date: 2005-09-23 01:26:12

Vladimir Prus wrote:
> Hi,
> just came across this blog post:
> 
>     http://scottcollins.net/blog/2005/09/question-for-other-boost-users.html
> 
> It's from a person affiliated with Trolltech (makers of Qt), and raises a
> question how Boost.Signals and Qt can be made to better work together.
> 
> Any user of both Boost and Qt cares to comment?
> 
> - Volodya
> 
> 
> _______________________________________________
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> 
See Boost.Signals FAQ #3:

3. How do I get Boost.Signals to work with Qt?
When building with Qt, the Moc keywords signals and slots are defined 
using preprocessor macros, causing programs using Boost.Signals and Qt 
together to fail to compile. Although this is a problem with Qt and not 
Boost.Signals, a user can use the two systems together by defining the 
BOOST_SIGNALS_NAMESPACE macro to some other identifier (e.g., 
signalslib) when building and using the Boost.Signals library. Then the 
namespace of the Boost.Signals library will be 
boost::BOOST_SIGNALS_NAMESPACE instead of boost::signals. To retain the 
original namespace name in translation units that do not interact with 
Qt, you can use a namespace alias:

   namespace boost {
     namespace signals = BOOST_SIGNALS_NAMESPACE;
   }

http://www.boost.org/doc/html/signals/s04.html