Here are some questions you might want to answer in your review:
* What is your evaluation of the design?
Looks good to me.
* What is your evaluation of the implementation?
Looks good, haven't looked much into the detail/ folder
* What is your evaluation of the documentation?
Good.
* What is your evaluation of the potential usefulness of the library?
Extremely useful.
* Did you try to use the library? With what compiler? Did you have any problems?
Haven't tried
* How much effort did you put into your evaluation? A glance? A quick reading? In-depth study?
Quick reading.
* Are you knowledgeable about the problem domain?
I've used hash_map implementations in the past.
And finally, every review should answer this question:
* Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion.
Yes, definitely! Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right