Re: [Boost-users] [MPL] Front of a set of types

On Mon, Aug 31, 2009 at 10:30 AM, OvermindDL1 wrote:

I do not know of set being ordered or any implementation I use (considering that runtime sets are generally hash maps), so I would not expect that to be ordered personally.  I would use vector if I want something ordered.

You're right and in fact the runtime std::set does not provide a "front" operation. I think you've got the problem: since sets are usually unordered a "front" operation may introduce ambiguities. Since mpl::set provides this operation I think its behavior should be made more explicit in order to avoid any ambiguities (like the ones I've described in the previous email) -- Marco