Re: [cpp-netlib-devel] Managing Tag Explosion

[Glyn M. <gly...@gm...>]

Hi Dean,

On 22 June 2010 12:06, Dean Michael Berris <mik...@gm...> wrote:

> Hi Guys,
>
> I've been working on something that allows for better tag composition
> in cpp-netlib. The idea is to actually now use template
> metaprogramming provided by Boost.MPL to differentiate whether tags
> denote certain properties. This should make tag specialization easier:
>
>  struct foo : async, http {};
>
> We can the query whether:
>
>  is_async<foo>::value // either boolean constant true or false
>  is_async<foo>::type // either mpl::true_ or mpl::false_
>
> This makes overloading the policy dispatcher metafunction
> significantly easier to extend.
>
> Thoughts? Comments?
>

This would be very useful.  I haven't been able to test it yet, but what is
the impact on compilation times?

G