[boost] Tuples and Bind problem

13 Jul 2006

      Hi all,

I'm having some difficulties getting the following piece of code to compile:

#include <iostream>
#include <vector>

#include <boost/utility.hpp>
#include <boost/bind.hpp>
#include <boost/tuple/tuple.hpp>

class AClass
{
public:
    AClass(){}
    void b(int i, int j, int k)
    {
       std:: cout << "a::b() - " << i << "\t" << j << "\t" << k << std::endl;
    }
};

template <typename T,int i> class select
{
public:
   typedef typename boost::tuples::element<i,T>::type result_type;

   template <typename U>
   result_type operator()(const U& u) const
   {
     return u.get<i>();
   }

};

int main(int argc, char* argv[])
{
   typedef boost::tuples::tuple<AClass,int,int,int> param_set;

    std::vector<param_set> list;
    list.push_back(param_set(AClass(),1,2,3));
    list.push_back(param_set(AClass(),2,3,4));
    list.push_back(param_set(AClass(),3,4,5));
    list.push_back(param_set(AClass(),4,5,6));
    list.push_back(param_set(AClass(),5,6,7));

     std::for_each(
                   list.begin(),
                   list.end(),
                   boost::bind(&AClass::b,
                               boost::bind(select<param_set,0>(),_0),
                               boost::bind(select<param_set,0>(),_1),
                               boost::bind(select<param_set,0>(),_2),
                               boost::bind(select<param_set,0>(),_3)));

     return true;
}

Basically the "select class" is a code snippet I found on this list,
the compilation errors I believe exist in how I'm calling bind, but
I cant tell whats going wrong.

Also I'm wondering is there a better way of doing what I'm trying to
do, is there already a class or something in boost that will allow
one to bind a function and a tuples of parameters.

Also I'm wondering if it will be possible to derive AClass from
boost::noncopyable and still be able to instantiate class instances
as part of method parameters.

Any help would be very much appreciated.

Arash Partow
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