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Compiler Error C3668

'method' : method with override specifier 'override' did not override any base class methods

A function attempted to override a non-existent function.

For more information, see Explicit Overrides.

The following sample generates C3668.

// C3668.cpp
// compile with: /c
__interface I {
   void f(int);   // virtual by default

class J {
   void g(int);
   virtual void h(int);

struct R : I,J {
   virtual void f() override {}   // C3668
   virtual void f(int) override {}   // OK

   virtual void g(int) override {}   // C3668
   virtual void h(int) override {}   // OK