annoying warning message

[Stefan Seefeld <seefelds at MAGELLAN dot UMontreal dot CA>]

Hi,

the following program produces a warning message though
I believe it is well formed.

-----------------------------------

template <class T>
class Var
{
public:
  Var(T *tt) : t(tt) {}
  ~Var() { delete t;}
  operator const T &() const { return *t;}
  operator T &() { return *t;}
private:
  T *t;
};

struct Vertex { double x, y, z;};
typedef Var<Vertex> Vertex_var;

void foo(const Vertex &) {}


int main(int, char **)
{
  Vertex_var vertex = new Vertex;
  foo(vertex);
};

--------------------------------------

the warning message (using g++ 2.95) is

const.cc:24: warning: choosing `Var<Vertex>::operator Vertex &()' over `Var<Vertex>::operator const
Vertex &() const'
const.cc:24: warning:   for conversion from `Vertex_var' to `const Vertex &'
const.cc:24: warning:   because conversion sequence for the argument is better
const.cc:18: warning: in passing argument 1 of `foo(const Vertex &)'

Who is right ?

Thanks,	Stefan

PS: In fact, the above is modeled after omniORB's implementation of
    var types. Since we use this kind of stuff a lot in our project we
    get lots of those warning messages.

_______________________________________________________              
              
Stefan Seefeld
Departement de Physique
Universite de Montreal
email: seefelds@magellan.umontreal.ca

_______________________________________________________

      ...ich hab' noch einen Koffer in Berlin...