//Purpose:
//  Test what happens when tuple with duplicate tags(i.e. placeholders)
//  is created.
//
#include <iostream>
#include <boost/type_erasure/tuple.hpp>

namespace mpl = boost::mpl;
using namespace boost::type_erasure;

  template
  < unsigned IdThis
  >
struct v
{
    v()
     {
        std::cout<<"v<"<<IdThis<<">()\n";
     }
    v( v const&)
     {
        std::cout<<"v<"<<IdThis<<">( v<"<<IdThis<<"> const&)\n";
     }
      template
      < unsigned IdOther
      >
    v( v<IdOther>const&)
    {
        std::cout<<"v<"<<IdThis<<">( v<"<<IdOther<<"> const&)\n";
    }
};  

int main()
{
        typedef 
      mpl::vector
      < copy_constructible<_a>
      , copy_constructible<_b>
      > 
    requirements;
      tuple<requirements, _a, _b, _b> 
    t
      ( (v<1>())
      , (v<2>())
      , (v<3>())
      );
    
    std::cout<<"&t="<<(void*)&t<<"\n";

    return 0;
}