Re: [boost] [mpl][ref] typeof registrations

From: Eric Niebler (eric_at_[hidden])
Date: 2007-10-29 15:59:47

Peter Dimov wrote:
>> Peter Dimov wrote:
>>> Eric Niebler:
>>>
>>>> I think the better solution is the one Arkadiy suggested ... that there
>>>> is a dedicated place for such registrations so interested parties can
>>>> add them if they need them.
>>> The various registrations are indeed the responsibility of the library
>>> authors but they will probably not happen unless it is possible to make 
>>> said
>>> registrations without including a foreign header and in a risk-free 
>>> manner.
>> Peter, I'm not exactly sure what you're arguing for here. Can you be
>> more specific?
> 
> Hm.
> 
> I think I'm arguing for a documented registration interface that looks like 
> this:
> 
> namespace boost
> {
> 
> namespace type_of
> {
> 
> template< class V, class T > struct encode_type;
> 
> template<> struct encode_type< whatever-is-required >
> {
>     whatever-is-required;
> };
> 
> } // namespace type_of
> 
> } // namespace boost
> 
> I've no idea how practical is that.

I'm confused. There already is a documented registration interface 
(involving macros). The question is where to put the registrations. 
Consider that if I consume library X and need X::Y to be registered, I 
could put the registration in my code, but if everybody did that it 
would be chaos.

Have I misunderstood your suggestion?

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com