David Abrahams wrote:

[..] template<class T, class Base> struct node;

typedef mpl::vector<int, char, long> types;

// node<int, node<char, node<long, mpl::empty_base> > > typedef mpl::inherit_linearly< types , node<_2,_1>

...

::type lin; [...] HTH.

That helps a lot. Thank you! -- Klaus Nowikow