SOURCE Eric Niebler wrote:
>  Jason Hise wrote:
>  
> >Martin Wille wrote:
> >
> >>Jason Hise wrote:
> >>
> >>>undef NULL
> >>>#define NULL (::boost::null)
> >>>  
> >
> >What existing code will it break?
>  
>  
>  struct foo {};
>  typedef void (foo::*memfunptr)();
>  memfunptr p = NULL;


Bad example. This is OK, somewhat surprisingly (to me, at least). But 
consider:

struct foo { foo(void*) {} };
void bar(foo f) {}
void baz() {
   bar(NULL);
}

Works with NULL as 0, fails with NULL as null because it needs two 
user-defined conversions.

>  Redefining NULL is a career-limiting move. Don't do it.

This is still correct, though.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com
_______________________________________________
Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost