id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
516,[variant] Bug in recursive_wrapper_fwd.hpp,nobody,ebf,"{{{
I've been tracking down an preprocessor warning involving the  
redefinition of BOOST_TT_AUX_BOOL_TRAIT_DEF1.  It appears to me that 
variant/recursive_wrapper_fwd.hpp is misusing:

#include ""boost/type_traits/detail/bool_trait_def.hpp""

The usual include pattern for this header is:

// should be the last #include
#include ""boost/type_traits/detail/bool_trait_def.hpp""

...

#include ""boost/type_traits/detail/bool_trait_undef.hpp""

But recursive_wrapper_fwd.hpp has:

#include ""boost/type_traits/detail/bool_trait_def.hpp""
#include ""boost/mpl/aux_/lambda_support.hpp""

...

and no include for bool_trait_undef.hpp.  This is causing a redefinition 
warning on Apple darwin for BOOST_TT_AUX_BOOL_TRAIT_DEF1.  
Changing recursive_wrapper_fwd.hpp to the usual use pattern of 
bool_trait_def.hpp as described above silences the warning.

Thanks,
Howard
hinnant@twcny.rr.com

}}}",Bugs,closed,,None,None,,Fixed,,