This isn't a review, mainly because I don't feel qualified to offer one, just a comment.
<div><br></div><div>I don&#39;t really understand what difficulty this library is intended to solve, I&#39;ve read the</div><div>comments about begin a generalisation of Any and Function, and Eric&#39;s naming</div><div>

suggestions of Boost.Duck etc, but a single a example of coding conundrum for which</div><div>this library is a better, or only, solution would be hugely helpful.</div><div><br></div><div>Thanks, Rob.</div>