#include <iostream>
#include <vector>
#include <list>
#include <utility>
#include <claw/iterator.hpp>
#include <claw/functional.hpp>

void bi_test()
{
  typedef std::list< std::pair<int, int> > container;

  container v;

  v.push_back( std::pair<int, int>(1, 1) );
  v.push_back( std::pair<int, int>(2, 4) );
  v.push_back( std::pair<int, int>(3, 9) );
  v.push_back( std::pair<int, int>(4, 61) );

  typedef
    claw::wrapped_iterator
    < int,
      container::iterator,
      claw::second<int, int>
    >::iterator_type
    iterator;
  
  iterator it;
  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  do
    {
      --it;
      std::cout << *it << ' ';
    }
  while ( it!=v.begin() );

  std::cout << std::endl;
}

void random_test()
{
  typedef std::vector< std::pair<int, int> > container;

  container v;

  v.push_back( std::pair<int, int>(1, 1) );
  v.push_back( std::pair<int, int>(2, 4) );
  v.push_back( std::pair<int, int>(3, 9) );
  v.push_back( std::pair<int, int>(4, 61) );

  typedef
    claw::wrapped_iterator
    < int,
      container::iterator,
      claw::second<int, int>
    >::iterator_type
    iterator;
  
  iterator it;
  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  it = v.begin();
  *(it + 3) = 18;

  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  *(it - 1) = 17;

  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  it = v.begin();
  it[3] = 16;

  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;
}

void complicated_test()
{
  typedef std::vector< std::pair<int, int>* > container;

  container v;

  v.push_back( new std::pair<int, int>(1, 1) );
  v.push_back( new std::pair<int, int>(2, 4) );
  v.push_back( new std::pair<int, int>(3, 9) );
  v.push_back( new std::pair<int, int>(4, 61) );

  typedef
    claw::wrapped_iterator
    < int,
      container::iterator,
      claw::unary_compose
      < claw::second<int, int>,
        claw::dereference< std::pair<int, int> >
      >
    >::iterator_type
    iterator;
  
  iterator it;
  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  it = v.begin();
  *(it + 3) = 18;

  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;

  *(it - 1) = 16;

  for ( it=v.begin(); it!=v.end(); ++it )
    std::cout << *it << ' ';

  std::cout << std::endl;
}

int main( int argc, char* argv[] )
{
  bi_test();
  std::cout << "--\n";
  random_test();
  std::cout << "--\n";
  complicated_test();

  return 0;
} // int main()