Re: constructor

nik wrote:


There are several ways. You might have a friend who could create an
instance because it has access to the private parts, or there might be
a public function that creates instance(s) of the class:

 class A
 {
 private:
   A() {}
 public:
   static std::auto_ptr<A> Create()
   {
     return std::auto_ptr<A>( new A );
   }
 };

The constructor might also be private if you shouldn't use that
constructor or create instances of the class at all, e.g., if it's a
template typedef equivalent:

 template<class T, class U>
 struct B
 {
   typedef T Type1;
   typedef U Type2;
 };

 template<class U>
 struct BWithInt
 {
   typedef B<int,U> Type;
 private:
   BWithInt(); // Private and undefined on purpose
 };

 BWithInt<float> someB; // Compile-time error: private c-tor
 BWithInt<float>::type someOtherB; // Ok

Cheers! --M