On Tue, Oct 18, 2011 at 3:54 PM, Vicente Botet wrote:

How is make_generator different from bind? Why

function g = bind(f,v);

Doesn't works for you?

Hi Vicente Thanks for answering. My initial response was "Doh, I've asked a really stupid question here.", which may still be true! But walk a little with me on this... In this code sequence #include <vector> #include <iostream> #include "boost/assign/std/vector.hpp" #include "boost/function.hpp" #include "boost/bind.hpp" using boost::function; using boost::bind; void do_it( function f ) { f( ); } void print( int i ) { std::cout << i << std::endl; } template function make_generator( function f, T1 t1 ) { return bind( f, t1 ); } template function make_generator( function f, T1 t1, T2 t2 ) { return bind( f, t1, t2 ); } template function make_generator( function f, T1 t1, T2 t2, T3 t3 ) { return bind( f, t1, t2, t3 ); } // ...etc... int main( ) { using namespace boost::assign; std::vector<int> v; v += 1,2,3,4,5,6,7; for_each( v.begin(), v.end(), bind( do_it, bind( make_generator, print, _1 ) )); } ...how would you write the final for_each using bind directly, given that the other interfaces are fixed? I think you'd need to specify the exact types taken and returned by bind, which are less than convenient to work with. So I think the answer to 'doesn't bind work for me?', is no, because I'd like specify the template instantiation types in a more convenient way. That may all be a load of gibberish - I'm feeling my way a bit here! Also, if my function signature handling skills were better, it might be better to specify the template parameter(s) of make_generator as a function signature or MPL type list. Thx, Rob.

On Thu, Oct 20, 2011 at 8:50 PM, Mathias Gaunard < mathias.gaunard@ens-lyon.org> wrote:

On 10/19/2011 11:23 AM, Robert Jones wrote:

...how would you write the final for_each using bind directly, given

...

that the other interfaces are fixed?

Use a polymorphic bind, like the standard one or the one from Boost.Phoenix v3.

Could you demonstrate? Ideally using the standard one, as I don't have Phoenix V3 available in this context. Thx, Rob.