[Bug c++/60852] New: boost::complement of enum class does not compile

["nevin at eviloverlord dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60852

            Bug ID: 60852
           Summary: boost::complement of enum class does not compile
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nevin at eviloverlord dot com

Created attachment 32608
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32608&action=edit
Reproducible test program

This works under gcc 4.7.2 and clang 3.4, but fails to compile under gcc 4.9
RC1.  enum class seems to be the only issue; plain enums work fine.

#include <boost/type_traits.hpp>
#include <iostream>

enum class E {};

int main()
{ std::cout << boost::has_complement<E>() << std::endl; }

Using Boost 1.55 and g++ -std=c++11, we get:

In file included from /opt/local/include/boost/config.hpp:57:0,
                 from /opt/local/include/boost/type_traits/add_const.hpp:13,
                 from /opt/local/include/boost/type_traits.hpp:13,
                 from a.cpp:1:
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp: In
instantiation of 'const bool
boost::detail::has_complement_impl::operator_exists<E>::value':
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:173:4:  
required from 'const bool boost::detail::has_complement_impl::trait_impl1<E,
boost::detail::has_complement_impl::dont_care, false>::value'
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:195:4:  
required from 'const bool boost::detail::has_complement_impl::trait_impl<E,
boost::detail::has_complement_impl::dont_care>::value'
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:202:1:  
required from 'struct boost::has_complement<E>'
a.cpp:7:41:   required from here
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:152:56:
error: no match for 'operator~' (operand type is 'E')
    BOOST_STATIC_CONSTANT(bool, value = (sizeof(check(((BOOST_TT_TRAIT_OP
make<Rhs>()),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
                                                        ^
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp: In
instantiation of 'const bool
boost::detail::has_complement_impl::operator_returns_void<E>::value':
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:173:4:  
required from 'const bool boost::detail::has_complement_impl::trait_impl1<E,
boost::detail::has_complement_impl::dont_care, false>::value'
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:195:4:  
required from 'const bool boost::detail::has_complement_impl::trait_impl<E,
boost::detail::has_complement_impl::dont_care>::value'
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:202:1:  
required from 'struct boost::has_complement<E>'
a.cpp:7:41:   required from here
/opt/local/include/boost/type_traits/detail/has_prefix_operator.hpp:89:102:
error: no match for 'operator~' (operand type is 'E')
    BOOST_STATIC_CONSTANT(bool, value =
(sizeof(::boost::type_traits::yes_type)==sizeof(returns_void((BOOST_TT_TRAIT_OP
make<Rhs>(),returns_void_t())))));
                                                                               
                      ^
a.cpp: In function 'int main()':
a.cpp:7:41: error: cannot bind 'std::ostream {aka std::basic_ostream<char>}'
lvalue to 'std::basic_ostream<char>&&'
 { std::cout << boost::has_complement<E>() << std::endl; }
                                         ^
In file included from /opt/local/include/gcc49/c++/istream:39:0,
                 from /opt/local/include/gcc49/c++/sstream:38,
                 from /opt/local/include/gcc49/c++/complex:45,
                 from /opt/local/include/boost/type_traits/is_complex.hpp:12,
                 from /opt/local/include/boost/type_traits.hpp:49,
                 from a.cpp:1:
/opt/local/include/gcc49/c++/ostream:602:5: note: initializing argument 1 of
'std::basic_ostream<_CharT, _Traits>&
std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT
= char; _Traits = std::char_traits<char>; _Tp = boost::has_complement<E>]'
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^