[boost] Re: Re: Policy-based smart pointers revisisted (was: Re:Preliminarysubmission: command line & config file library)

From: Edward Diener (eddielee_at_[hidden])
Date: 2003-01-18 09:33:58

"David Abrahams" <dave_at_[hidden]> wrote in message
news:un0lyy3d0.fsf_at_boost-consulting.com...
>
> In Boost.Python I'm using a system for interfaces such as this one
> where optional template parameters can be passed in any order.  I'm
> using the properties of the type to detect their meaning.  It works
> great.  Using boost/mpl/has_xxx.hpp (and, for compilers which don't
> support it, is_base_and_derived) should be enough to build a nice
> policy-based interface.

Is the technique of allowing optional template parameters to be passed in
any order a part of MPL ? I haven't looked at MPL at all since I didn't see
it in Boost 1.29 but maybe it is there and I missed it.