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Compiler Error C2509

  • Article

'identifier' : member function not declared in 'class'

The function is not declared in the specified class.

Example

The following sample generates C2509.

// C2509.cpp
// compile with: /c
struct A {
   virtual int vfunc() = 0;
   virtual int vfunc2() = 0;
};

struct B : private A {
   using A::vfunc;
   virtual int vfunc2();
};

int B::vfunc() { return 1; }   // C2509
int B::vfunc2() { return 1; }   // OK