Michael Goldshteyn wrote:
What is:
namespace boost { const class {
???
It worked with VC, but I just checked it with comeau and it failed to compile. To fix it, I had to provide a name for the class and an explicit default constructor. Naming the class null works, because then the class name is hidden by the global variable name and thus other instances of type null cannot be declared. Updated code: namespace boost { const class null { private: void operator & ( ) const; public: null ( ) { } #ifndef BOOST_NO_MEMBER_TEMPLATES // provide conversion to any pointer type template < typename Class, typename Type > operator Type Class::* ( ) const { return 0; } template < typename Type > operator Type * ( ) const { return 0; } #else //provide conversion to int if member templates are not supported operator int ( ) const { return 0; } #endif//BOOST_NO_MEMBER_TEMPLATES } null; } #undef NULL #define NULL (::boost::null) -Jason