Re: [boost] none.hpp

Martin Wille wrote:

Joe Gottman wrote:

...

In order to avoid having an unnamed namespace inside a header file, none.hpp has been rewritten as

namespace boost { none_t const none = ((none_t)0) ; } // namespace

But if two source files contain none.hpp won't this violate the one-definition rule?

none would have internal linkage according to 7.1.5.1/2. So it wouldn't violate the ODR. But a pointer to none from one translation unit would differ from a pointer to none from a different TU.

Does this difference matter? Fernando Cacciola