Re: [Boost-bugs] [Boost C++ Libraries] #5487: Trying to get<nullptr_t> from a variant results in error with vs10

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5487: Trying to get<nullptr_t> from a variant results in error with vs10
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-12-10 15:45:19

#5487: Trying to get<nullptr_t> from a variant results in error with vs10
-------------------------------+-----------------------------------------
  Reporter:  dd0t@…            |      Owner:  no-maintainer
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  utility
   Version:  Boost 1.46.1      |   Severity:  Problem
Resolution:                    |   Keywords:  nullptr_t variant addressof
-------------------------------+-----------------------------------------
Changes (by apolukhin):

 * cc: antoshkka@… (added)
 * owner:  ebf => no-maintainer
 * component:  variant => utility

Comment:

 Even a simpler example:
 {{{
 #include <boost/utility/addressof.hpp>

 int main() {
     auto p = nullptr;
     boost::addressof(p);
 }
 }}}

 Code above results gives the same error on MSVC11:

 {{{
 F:\boost_1_55_0\boost/utility/addressof.hpp(59): error C2666:
 'boost::detail::addressof_impl<T>::f' : 2 overloads have similar
 conversions
 1>          with
 1>          [
 1>              T=nullptr
 1>          ]
 1>          F:\boost_1_55_0\boost/utility/addressof.hpp(43): could be
 'nullptr *boost::detail::addressof_impl<T>::f(T *,int)'
 1>          with
 1>          [
 1>              T=nullptr
 1>          ]
 1>          F:\boost_1_55_0\boost/utility/addressof.hpp(37): or
 'nullptr *boost::detail::addressof_impl<T>::f(T &,long)'
 1>          with
 1>          [
 1>              T=nullptr
 1>          ]
 1>          while trying to match the argument list
 '(boost::detail::addr_impl_ref<T>, int)'
 1>          with
 1>          [
 1>              T=nullptr
 1>          ]
 1>          main.cpp(5) : see reference to function template instantiation
 'T *boost::addressof<nullptr>(T &)' being compiled
 1>          with
 1>          [
 1>              T=nullptr
 1>          ]
 }}}

 While GCC compiles successfully.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5487#comment:1>
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