[boost] [mpl] [type_traits] [enable_if] Overloading Problem with GCC 3.3.3

Subject: [boost] [mpl] [type_traits] [enable_if] Overloading Problem with GCC 3.3.3
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-12-08 15:17:44

Can anyone figure out why GCC 3.3.3 doesn't like the following member function overloads?  VC7/8/9 and GCC 4.1.2 have no problems with this code.

#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/utility/enable_if.hpp>

struct Bar
{
};

template <class T>
struct Baz
{
};

struct Foo
{
   template <class T>
   typename boost::enable_if
   <
      boost::mpl::and_
      <
         boost::is_convertible<T,Bar>
         , boost::mpl::not_<boost::is_const<T> >
      >
   >::type
   set(Baz<T> const & _value);

   template <class T>
   typename boost::enable_if
   <
      boost::mpl::and_
      <
         boost::is_convertible<T,Bar>
         , boost::is_const<T>
      >
   >::type
   set(Baz<T> const &);
};

GCC 3.3.3's error message is:

error: `template<class T> typename
   boost::enable_if<boost::mpl::and_<boost::is_convertible<T, Bar>,
   boost::is_const<T>, mpl_::bool_<true>, mpl_::bool_<true>, mpl_::bool_<true>
   >, void>::type Foo::set(const Baz<T>&)' and `template<class T> typename
   boost::enable_if<boost::mpl::and_<boost::is_convertible<T, Bar>,
   boost::mpl::not_<boost::is_const<T> >, mpl_::bool_<true>, mpl_::bool_<true>,
   mpl_::bool_<true> >, void>::type Foo::set(const Baz<T>&)' cannot be
   overloaded

_____
Rob Stewart                           robert.stewart_at_[hidden]
Software Engineer, Core Software      using std::disclaimer;
Susquehanna International Group, LLP  http://www.sig.com

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