[GiNaC-list] Problem using a user-defined class on Mac OS X.

Alexei Sheplyakov varg at theor.jinr.ru
Wed Apr 4 08:55:46 CEST 2007

On Tue, Apr 03, 2007 at 07:42:46PM -0400, David Fang wrote:
> I may be jumping in a bit late, and without having looked through the
> source, but are we looking at a violation of the basic one-definition-rule
> (ODR)?

No. There are no multiple definitions. Only one specialization (which
provides best match) is selected by the compiler.

> whereby a specialization is providing a definition that is
> otherwise expected from a primary template?

C++ standard allows this (see e.g. 14.7.3).

So, this is OK:

template<typename T> class foo {
	static T data;

template<typename T> class foo<T*> {
	static void* data;

template<typename T> T foo<T>::data = T(1);

template<typename T> void* foo<T*>::data = 0;

> (For the record, which version
> are we looking at, so I may check it out?)


Best regards,

All science is either physics or stamp collecting.

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