is_base<T, T> is broken on MSVC10 when T is not defined

[Aleksej Lebedev <root@…>]

Currently on Windows with MSVC10 boost defines BOOST_IS_BASE_OF (which is used in is_base_and_derived, which is used in is_base_of) as follows:

#define BOOST_IS_BASE_OF(T,U) (__is_base_of(T,U) && !is_same<T,U>::value)

But microsoft's intrinsic __is_base_of cannot be used with the same type (i.e. T = U) when it (the type) is not defined.

When the following is compiled

class A;
typedef typename boost::is_base_of<A, A>::type x;

you get an error message:

...\include\boost\type_traits\is_base_and_derived.hpp(228) : error C2139: 'A' : an undefined class is not allowed as an argument to compiler intrinsic type trait '__is_base_of'
...\include\boost\type_traits\is_base_of.hpp(29) : see reference to class template instantiation 'boost::detail::is_base_and_derived_impl<B,D>' being compiled
        with
        [
            B=A,
            D=A
        ]

The same code compiles on gcc-4.8.2 and clang-3.6.

[John Maddock]

Moved to ​https://github.com/boostorg/type_traits/issues/82