1 #ifndef __PRIVATE_CONSTRUCTOR__H
2 #define __PRIVATE_CONSTRUCTOR__H
3 
4 #include <iostream>
5 
6 struct PrivateConstructor {
7 
8     PrivateConstructor static make ( int v ) { return PrivateConstructor(v); }
9     int get () const { return val; }
10 private:
11     PrivateConstructor ( int v ) : val(v) {}
12     int val;
13     };
14 
15 bool operator < ( const PrivateConstructor &lhs, const PrivateConstructor &rhs ) { return lhs.get() < rhs.get(); }
16 
17 bool operator < ( const PrivateConstructor &lhs, int rhs ) { return lhs.get() < rhs; }
18 bool operator < ( int lhs, const PrivateConstructor &rhs ) { return lhs < rhs.get(); }
19 
20 std::ostream & operator << ( std::ostream &os, const PrivateConstructor &foo ) { return os << foo.get (); }
21 
22 #endif
23