[boost] Re: is_abstract_base<T> ?

From: Joe Gottman (jgottman_at_[hidden])
Date: 2003-01-24 23:40:40

"Pavel Vozenilek" <pavel_vozenilek_at_[hidden]> wrote in message
news:b0svlm$l1q$1_at_main.gmane.org...
>
> "Robert Ramey" <ramey_at_[hidden]> wrote in message
> news:01C2C3B8.367B8A60_at_226-146.adsl2.netlojix.net...
> > 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.
> >
> Rani Sharoni wrote is_abstract_class<T> type trait (see
> on
>
http://groups.google.com/groups?q=is_abstract_class&hl=en&lr=&ie=UTF-8&oe=UT

   This class determines whether it is possible to create an array of type
T.  If it is not, and T is not void, a reference, or a function, it assumes
that T must be an abstract base class.  The problem is that it is impossible
to create an array of any type that does not have a public constructor, for
instance a non-abstract singleton class.  So this does not quite work.

Joe Gottman