Re: [Boost-users] [mpl - function_types] Generate typedef from operator() of a functor

Thanks again Joel. 2010/1/30 joel falcou

Olivier Tournaire wrote:

...

Hi all,

Given an mpl sequence of types such as: typedef mpl::vector arg_types;

1) the users of my library provide functors such as F (where T0 and T1 may have been any of the types of arg_types:

class F { typedef mpl::pair signature_type; double operator()(const T0& t0, T1& t1); }; is there a way to generate signature_type automatically ?

Retrieve the operator() params usign aprameter_types, it'll end up as

vector

then use mpl::pop_front to remove the unwanted pointer to member

2) if the operator() is overloaded, the user class currently has to

...

typedef an mpl::vector of mpl::pairs such as

class G { typedef mpl::vector, mpl::pair, mpl::pair

...

signature_type; double operator()(const T2& t2, T3& t3); double operator()(const T1& t1, T1& t1); double operator()(const T3& t3, T1& t1); };

Why don't you use something like the result_of protocol ?

Why not. Could you give us more details ? Regards

Maybe easier

-- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users