"Robert Ramey" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Is there such a thing as is_abstract_base<T> similar to is_polymorphic<T> ? > > Is such a thing possible? I could use it but have been unable to figrure > out how to do it. >
I assume that you expect is_abstract_base<T> to return true if and only if it is it is impossible to create an object of type T, and you must create an object of some subclass of T instead. One problem with this is that there are two very different ways of requiring the user to derive from T. The most common way is to declare type T with one or more pure virtual member functions. The other way is to declare T so that all its constructors are protected, as in boost::noncopyable. Joe Gottman _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
