TITLE: The three character types are distinct for overloading

[ This example adapted from "C++ Gotchas", tutorial notes
  copyright by Tom Cargill. ]


class C {
  public:
    void f (char);
    void f (unsigned char);
    void f (signed char);
    ...
};

int main ()
{
    char c;
    unsigned char u;
    signed char s;

    C x;

    x.f (c);  // ok
    x.f (u);  // ok
    x.f (s);  // ok
    x.f (1);  // ambiguous

    return 0;
}


For more information, see ARM page 310.