"Klaus Nowikow" writes:

Greetings!

Does boost.mpl provide type hierarchy generators like GenScatterHierarchy and GenLinearHierarchy as described in "Modern C++ Design"? I must confess I do not understand the mpl completely yet ;-)

Well, yeah. It's just a thin wrapper over mpl::fold // inherit_linearly.hpp template< typename Types_ , typename Node_ , typename Root_ = empty_base > struct inherit_linearly : fold { }; // inherit.hpp template struct inherit : A, B {}; So: #include template struct node; typedef mpl::vector types; // node > > typedef mpl::inherit_linearly< types , node<_2,_1>

::type lin;

or: #include #include template <class T> struct node; // mpl::inherit< // node<int> // , inherit< // node<char> // , inherit< // node<long> // , mpl::empty_base // > // > // > typedef mpl::inherit_linearly< types , mpl::inherit,_1>

::type scat;

HTH. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com