Re: [boost] New Library Proposal: dual_state

Eelis van der Weegen <gmane@contacts.eelis.net> writes:

So, in conclusion, the motivation for your dual_state is very valid, but personally I think Boost.Optional is a more appropriate design.

IMO the "guaranteed object delivery" feature makes for a useful specialization of the Boost.Optional design. However, it would be nice to have both; it's not an alternative to Boost.Optional. There's a lot of resonance with the Boost.Parameter library in here. -- Dave Abrahams Boost Consulting www.boost-consulting.com