Hi, I was looking for a way to convert a member function type: bool (X::*)(int) or bool (X::)(int) to the 'C' equivalent, without the class pointer: bool (*)(int) or bool(int) Now, I used this helper class: // Converts R (X::)(Args) to R (Args) template<class F> class UnMember { typedef boost::function_type_signature<F> member_signature; typedef typename boost::mpl::erase<typename member_signature::types, typename boost::mpl::next<typename boost::mpl::begin<member_signature>::type>::type>::type non_member_signature; public: typedef typename boost::function_type<boost::plain_function,non_member_signature>::type type; }; And use it like: typedef UnMember<bool(X::)(int)>::type PlainFunctionType; It gets even complexer when one wants to convert a member function type to a function type which takes the member as first argument: // Converts R (X::)(Args) to R (X::*, Args) template<class F> class MemberToFirstArg { typedef boost::function_type_signature<F> member_signature; // remove the class from the arg list: typedef typename boost::mpl::erase<typename member_signature::types, typename boost::mpl::next<typename boost::mpl::begin<member_signature>::type>::type>::type non_member_signature; // insert it as first argument. typedef typename boost::mpl::insert<non_member_signature, typename boost::mpl::next<typename boost::mpl::begin<non_member_signature>::type>::type, typename boost::add_pointer<typename boost::mpl::at<typename member_signature::types,boost::mpl::int_<1> >::type>::type
::type arg_signature; public: typedef typename boost::function_type<boost::plain_function,arg_signature>::type type; };
Is there an easier way to do this ? Does a boost library have a mechanism to convert member function types to non-member function types and vice versa ? Peter -- Peter Soetens -- FMTC -- <http://www.fmtc.be>