Confusing about the accessibility of the base class

[zhang qingshan <steven.zhang54373@xxxxxxxxx>]

Hi, guys,

I test the following testcase with GCC 4.6

struct A {
private:
   struct Patch {};
};

#ifdef TMPL
template <int x>
#endif
struct X : private A
{
   void f () {
      typedef A::Patch Patch;
   }
};
int main()
{
#ifdef TMPL
  X<1> d;
#else
  X d;
#endif
  d.f();
}

If TMPL is not defined, get the error message:

/data/a.cpp: In member function 'void X::f()':
/data/a.cpp:3:11: error: 'struct A::Patch' is private
/data/a.cpp:12:24: error: within this context

which makes sense, as struct Patch is the private member of struct A.
But if TMPL is defined, GCC compiles it clean. This confuses me.