On Jul 25, 2006, at 1:45 PM, Howard Hinnant wrote:
namespace Mine {
struct Person {};
struct Female : public Person {};
bool isnormal(const Person&);
}
int main() { using namespace boost; // for boost::bind (just as an example) Mine::Female Jane; bool b = isnormal(Jane); }
If this code doesn't make you nervous (because of the using directive), the related code below might: namespace Mine { struct sense_of_humor {}; struct Person : private boost::optional<sense_of_humor> {}; struct Female : public Person {}; bool isnormal(const Person&); bool foo() { Female Jane; return isnormal(Jane); } } // Mine int main() { Mine::foo(); } Again, isnormal will get hijacked by boost::isnormal(T) if it is in the translation unit (and in namespace boost and not somehow constrained). template <class T> typename enable_if < std::numeric_limits<T>::is_specialized, bool
::type isnormal(T t) {...}
-Howard