[RESOLVED] Deep inheritance and using directive

[GNiewerth]

Hi,

is the following piece of code correct or am I doing something stupid?

struct A {};
struct B {};
struct C {};

struct Interface
{
   virtual ~Interface()
   {
   }

   virtual void func( const A& Obj ) = 0;
   virtual void func( const B& Obj ) = 0;
   virtual void func( const C& Obj ) = 0;
};

struct Default : Interface
{
   virtual ~Default()
   {
   }

   void func( const A& Obj ) {}
   void func( const B& Obj ) {}
   void func( const C& Obj ) {}
};

struct Special : Default
{
   // bring all func methods of Default into scope
   using Default::func;

   // specialize on A
   void func( const A& Obj )
   {
   }
};

I´ve got two compiler warnings:
(1) Special::func( const A& ) hides virtual function Default::func( const B& Obj )
(2) Special::func( const A& ) hides virtual function Default::func( const C& Obj )

Is my compiler correct? From my understanding I´m telling it I want all func methods from the bases class to be available in Special.

[laserlight]

The compiler warnings are wrong, and you can verify that by attempting to invoke the inherited func member functions that take a B and a C object by const reference respectively.

[JohnW@Wessex]

VS 2008 & Comeau say
Even PC-Lint is happy!

[Khiem]

Adding DevC's mingW to make it more real

[GNiewerth]

That´s what I already suspected. I ran it in Dinkumware´s online EXAM using different compilers and none showed any warnings.
Thanks to all of you for confirming this.

[Thu]

That can be changed anytime due to bugs/outofdate versionxxxx