Gennadiy Rozental wrote:
"Michael Marcin" <mike@mikemarcin.com> wrote in message news:etqf0t$6ea$1@sea.gmane.org...
Unless I'm missing something it looks like polymorphic_downcast doesn't provide an overload for reference types... is there a reason? This makes it a little inconvenient for use.
I brought this up some time ago. No one seemed to care enough to work on docs update. As usual in many volunteering based projects ;)
R u up to it?
Is the problem the docs or the lack of an overload supporting references? Shouldn't something like this work? #include <boost/type_traits/remove_reference.hpp> #include <boost/type_traits/add_pointer.hpp> #include <boost/utility/addressof.hpp> namespace boost { template <class Target, class Source> inline Target polymorphic_downcast( Source& x ) { BOOST_ASSERT( dynamic_cast< typename add_pointer< typename remove_reference<Target>::type >::type >( addressof(x) ) == addressof(x) ); // detect logic error return static_cast<Target>(x); } } //end namespace boost Thanks, Michael Marcin