Re: Weird compile error in conjunction with templates & inheritance

Why is the following code, which used to compile fine some years ago,
not compiling anymore? :-)

g++ test.cpp
test.cpp: In member function ???int D<T>::Size()???:
test.cpp:35: error: ???v??? was not declared in this scope
test.cpp:35: error: ???k??? was not declared in this scope

// test.cpp

template <typename T = int>
class B
   {
     public:
       int v, k;

       B(int Av, int Ak)
         {
           v = Av;
           k = Ak;
         }

       virtual int Size() = 0;

       //...
   };
   
template <typename T = int>
class D : public B<T>
   {
     public:
       D(int Av, int Ak) : B<T>(Av, Ak)
         {
         }
         
       int Size()
         {
           return v * k;