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
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