Pointer to class member as template parameter

From the standard:

A non-type template-parameter shall have one of the following (optionally cv-qualified) types:

• integral or enumeration type,
• pointer to object or pointer to function,
• reference to object or reference to function,
• pointer to member.

So it is allowed, and seems to work on g++ like this:

template <Dog Person::*ptr>
struct Strange { ... };