Problems with g++ 4.0.2 (templates, friends and inheritance)

[Emanuel Ziegler]

Hi,

since I upgraded from gcc 3.4 to 4.0.2 I have several problems with
templates. The first one applies to friend template functions. While the
following code

---8<---

template <class T>
class FriendClass
{
  // This line causes trouble
  friend T get_test<T> (const FriendClass &);
  protected:
    T test;
};

template <class T>
T get_test (const FriendClass<T> &fc)
{
  return fc.test;
}

int main ()
{
  FriendClass<int> fc;
  get_test(fc);
  return 0;
}

--->8---

compiled without any problems before, it now gives the errors
  error: 'get_test' is neither function nor member function; cannot be declared 
friend
  error: expected ';' before '<' token
in 4.0.2. But I'm pretty sure it's valid C++ code.

Another problem concerns inheritance. Although members are declared
protected and inheritance is public, the members are not transferred into
the scope of the derived class:

---8<---

template <class T>
class Base
{
  protected:
    int test;
};

template <class T>
class Derived : public Base<T>
{
  protected:
    // This doesn't work
    /* using namespace Base<T>; */
    // This works but should be useless and is unhandy
    using Base<T>::test;
    void set_test ()
    {
      test = 0;
    }
};

int main ()
{
  return 0;
}

--->8---

One can override the problem by including a "using" statement for each
member or accessing them with Base<T>:: but this is very unhandy. "using
namespace" doesn't work, but should be unnecessary anyway.

Anyone else experienced similar problems? I am using the gcc version
shipped with SUSE 10.0.

Many thanks,
  Emanuel