Re: [Boost-users] polymorphic_downcast and references

"Michael Marcin" wrote in message news:etqr7a$ocr$1@sea.gmane.org...

Gennadiy Rozental wrote:

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"Michael Marcin" wrote in message news:etqf0t$6ea$1@sea.gmane.org...

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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?

Primarily docs. Search the development mailing list archive.

Shouldn't something like this work?

#include #include #include

namespace boost { template 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

I believe my version did something along these lines. Genandiy