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Added Borland workaround, just to get type_traits happy again.

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[SVN r15406]
This commit is contained in:
Dave Abrahams
2002-09-17 12:20:20 +00:00
parent 18a66d5e2e
commit ef6fef7b46
1 changed files with 29 additions and 7 deletions
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36
include/boost/mpl/if.hpp
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@@ -155,19 +155,41 @@ struct if_
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
BOOST_MPL_AUX_VOID_SPEC(3, if_)
#ifndef __BORLANDC__
BOOST_MPL_AUX_VOID_SPEC(3, if_)
#else // try explicit workaround for C++ Builder
namespace aux_
{
struct if_void_specialization
{
template< typename T1,typename T2,typename T3 , typename T4=void_,
typename T5=void_ >
struct apply
: if_< T1,T2,T3 > { };
};
}
/*
template<>
struct if_< void_,void_,void_ >
: aux_::if_void_specialization
{
template< typename T1,typename T2,typename T3 , typename T4=void_, typename T5=void_ >
struct apply : if_< T1,T2,T3 > { };
};
namespace aux { template< typename T1,typename T2,typename T3 > struct template_arity< if_< T1,T2,T3 > > { static const int value = 3; };
template<> struct template_arity< if_< void_,void_,void_ > > { static const int value = 3; }; }
*/
namespace aux
{
template< typename T1,typename T2,typename T3 >
struct template_arity< if_< T1,T2,T3 > >
{ static const int value = 3; };
template<>
struct template_arity< if_< void_,void_,void_ > >
{ static const int value = 3; };
}
#endif
} // namespace mpl
} // namespace boost