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Message: [QUOTE="Kai-Uwe Bux, post: 2573524"] Rarely, but keep in mind that operator& is overloadable. So, when you have a function foo ( T* ptr ); and you call it like foo(&obj), it could happen that the compiler complains that &obj is not of type T* even though obj is of type T. I think so. The boost version runs (essentially) like this: template <typename T> T* addressof ( T & v ) { return reinterpret_cast<T*>( &const_cast<char&>(reinterpret_cast<const volatile char &>(v))); } I never quite understood why they put in the const volatile just to cast ways the constness in the very next step. Best Kai-Uwe Bux [/QUOTE]