[Boost-bugs] [Boost C++ Libraries] #11449: [C++11] is_polymorphic doesn't work with final-ed class in MSVC.

Subject: [Boost-bugs] [Boost C++ Libraries] #11449: [C++11] is_polymorphic doesn't work with final-ed class in MSVC.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-07-03 09:01:43

#11449: [C++11] is_polymorphic doesn't work with final-ed class in MSVC.
---------------------------------------+-------------------------
 Reporter:  Kohei Takahashi <flast@…>  |      Owner:  johnmaddock
     Type:  Bugs                       |     Status:  new
Milestone:  To Be Determined           |  Component:  type_traits
  Version:  Boost Development Trunk    |   Severity:  Problem
 Keywords:                             |
---------------------------------------+-------------------------
 Following code don't compile in MSVC 12 and 14 RC: I didn't test with
 other versions.

 {{{
 #!c++
 #include <type_traits>
 #include <boost/type_traits/is_polymorphic.hpp>

 struct S final {};

 int main()
 {
         static_assert(!std::is_polymorphic<S>::value, "S should not be a
 polymorphic type"); // works fine
         static_assert(boost::is_polymorphic<final>::value, "hmm..."); //
 hard error
 }
 }}}

 [[Image(66bfcbfd052b0b94e6fe284d4a2ac78a.png)]]

 The error message says:

     'boost::detail::is_polymorphic_impl1<T>::d1' cannot derive from 'S'
 because it is declared as 'final'.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11449>
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