title: Large scale usage of Meyer's advice to prefer Non-member,non-friend functions?
body: <p>For some time I've been designing my class interfaces to be minimal, preferring namespace-wrapped non-member functions over member functions.  Essentially following Scott Meyer's advice in the article <a href="http://www.drdobbs.com/cpp/184401197" rel="noreferrer">How Non-Member Functions Improve Encapsulation</a>.  </p>
  
  <p>I've been doing this with good effect in  a few small scale projects, but I'm wondering how well it works on a larger scale.  Are there any large, well regarded open-source C++ projects that I can take a look at and perhaps reference where this advice is strongly followed?     </p>
  
  <p>Update: Thanks for all the input, but I'm not really interested in opinion so much as finding out how well it works in practice on a larger scale.   Nick's answer is closest in this regard, but I'd like to be able to see the code.  Any sort of detailed description of practical experiences (positives, negatives, practical considerations, etc) would be acceptable as well.  </p>