Re: [Boost-users] class composition

AMDG Hicham Mouline wrote:

There is an example listed in "C++ template metaprogramming" to generate a class with its members from an mpl sequence:

template <typename T> struct wrap { typedef T value; };

typedef mpl::vector< type1, type2, type3 > member_types; mpl::inherit_linearly< member_types, mpl::inherit< wrap<_2>, _1 > >::type generated;

but then, the generated class did not look like this:

class C { type1 t1; type2 t2; type3 t3; };

Can one do that with BOOST_PP and sequences from preprocessor libs instead?

You can--or you can just use fusion. boost::fusion::as_vector::type v; boost::fusion::at_c<0>(v); // object of type type1 boost::fusion::at_c<1>(v); // object of type type2 In Christ, Steven Watanabe