derived class as default argument g++
- by Vincent
Please take a look at this code:
template<class T>
class A
{
class base
{
};
class derived : public A<T>::base
{
};
public:
int f(typename A<T>::base& arg = typename A<T>::derived())
{
return 0;
}
};
int main()
{
A<int> a;
a.f();
return 0;
}
Compiling generates the following error message in g++:
test.cpp: In function 'int main()':
test.cpp:25: error: default argument for parameter of type
'A<int>::base&' has type 'A<int>::derived'
The basic idea (using derived class as default value for base-reference-type argument) works in visual studio, but not in g++. I have to publish my code to the university server where they compile it with gcc. What can I do? Is there something I am missing?
