[Boost-users] [mpl::transform] How to make metafunction from transform?

Hello All! I want to parametrize mpl::transform to form a new metafunction. But I have confused with mpl syntax and notations. Imagine, I have following vector typedef boost::mpl::vector types; and following transformation: typedef boost::mpl::transform< types , boost::is_convertible

::type result;

The result of the tansformation is a bool vector that indicates whether Type3 is convertible to any of type from types vector. Now I want to form metafunction that will construct such array not from Type3, but from its argument. Of course, I may use straightforward method: struct WhoConverted { template <typename ConversionType> struct apply { typedef typename boost::mpl::transform< types , boost::is_convertible >::type type; }; }; But it seems more like workaround rather than solution. Can it be done in more convenient and short manner by means of all mpl machinery like mpl::lambda, mpl::bind, placeholders, etc... ? -- Vyacheslav E. Andrejev System Architect, Excelsior, LLC