[Boost-bugs] [Boost C++ Libraries] #7815: boost/intrusive/detail/has_member_function_callable_with.hpp: inheriting from a const class

Subject: [Boost-bugs] [Boost C++ Libraries] #7815: boost/intrusive/detail/has_member_function_callable_with.hpp: inheriting from a const class
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-12-20 10:21:39

#7815: boost/intrusive/detail/has_member_function_callable_with.hpp: inheriting
from a const class
-------------------------------+--------------------------------------------
 Reporter:  1czajnik@…         |       Owner:  igaztanaga
     Type:  Bugs               |      Status:  new       
Milestone:  To Be Determined   |   Component:  intrusive 
  Version:  Boost 1.52.0       |    Severity:  Problem   
 Keywords:                     |  
-------------------------------+--------------------------------------------
 Hello,

 I tried to use a boost::container::vector with a Texas Instruments
 compiler, and I got an error pointing to line 88 of
 <boost/intrusive/detail/has_member_function_callable_with.hpp> "Invalid
 base class", with Type=const std::allocator<something>"

 Here's the context:
 {{{
       template <typename Type>
       class BOOST_PP_CAT(has_member_function_named_,
 BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME)
       {
          struct BaseMixin
          {
             void
 BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME();
          };

          struct Base : public Type, public BaseMixin { Base(); }; // <--
 line 88
 }}}
 The problem seems to be the constness of Type. Here's a simplified
 example:
 {{{
 struct X {};

 template < class T >
 struct Y : T { Y() {} };

 int main()
 {
     Y<const X> y;
 }

 }}}
 The above example compiles fine with Linux gcc version 4.5.4, and MinGW
 4.5.0, but fails with my TI compiler.

 For now, my workaround is:
 {{{
 struct Base : public ::boost::remove_cv<Type>::type, public BaseMixin {
 Base(); }; // <-- line 88
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7815>
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