Compiler Error C3210

Article
08/03/2021

'type' : access declaration can only be applied to a base class member

A using declaration was specified incorrectly.

Example

The following sample generates C3210.

// C3210.cpp
// compile with: /c
struct A {
protected:
   int i;
};

struct B {
   using A::i;   // C3210
};

struct C : public A {
   using A::i;   // OK
};