title: Examples of practical usage of Boost::MPL?
body: <p>Can you share any real-world examples of <a href="http://www.boost.org/doc/libs/1_45_0/libs/mpl/doc/index.html" rel="noreferrer">Boost::MPL</a> usage (except lambdas), just to let me better understand its purposes and field of practical usage? The MPL documentation tutorial has a <a href="http://www.boost.org/doc/libs/1_45_0/libs/mpl/doc/tutorial/dimensional-analysis.html" rel="noreferrer">dimensional analysis</a> example, but maybe because it's such an academic example it hasn't given me a feeling of Boost::MPL and when it can be effectively used.</p>