Have you used boost::tribool in real work?

Question

tribool strikes me as one of the oddest corners of Boost. I see how it has some conveniences compared to using an enum but an enum can also be easily expanded represent more than 3 states.

In what real world ways have you put tribool to use?

Answer 1

While I havn't used C++, and hence boost, I have used three-state variables quite extensively in a network application where I need to store state as true/false/pending.