From: Rob Stewart (stewart_at_[hidden])
Date: 2004-04-02 11:05:58
From: David Abrahams <dave_at_[hidden]>
>
> Technically one can never say "class template foo is a traits
> template" or "class template foo is a policy" without examining how
> it's used. There's no fundamental reason that the same class template
> can't be used in both ways, so for any given class template, there may
> be no either/or answer.
I don't quite agree. A policy class is only that because it is a
template parameter. Whether a class that is passed as a policy
to some template happens to be a traits class is immaterial. So,
in the context of the template, the template parameter is a
policy class and that may correspond to a traits class in a
particular specialization, but that doesn't make the traits class
a policy class. Does that make sense?
-- Rob Stewart stewart_at_[hidden] Software Engineer http://www.sig.com Susquehanna International Group, LLP using std::disclaimer;