Template specialization based on inherit class

Question

I want to make this specialized w/o changing main. Is it possible to specialize something based on its base class? I hope so.

-edit-

I\'ll have several class

Answer 1

Well, the article in the answer above appeared in February 2002. While it works, today we know there are better ways. Alternatively, you can use enable_if:

template
struct enable_if {
  typedef T type;
};

template
struct enable_if { };

template
struct is_same {
    static bool const value = false;
};

template
struct is_same {
    static bool const value = true;
};

template                                 
struct is_base_of {                                                       
    static D * create_d();                     
    static char (& chk(B *))[1]; 
    static char (& chk(...))[2];           
    static bool const value = sizeof chk(create_d()) == 1 &&  
                              !is_same::value;
};

struct SomeTag { };
struct InheritSomeTag : SomeTag { };

template
struct MyClass { /* T not derived from SomeTag */ };

template
struct MyClass::value>::type> {
    typedef int isSpecialized;
};

int main() {
    MyClass::isSpecialized test1;        /* ok */
    MyClass::isSpecialized test2; /* ok */
}