text: // Boost.Geometry (aka GGL, Generic Geometry Library)
  // QuickBook Example
  
  // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
  // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
  
  // Use, modification and distribution is subject to the Boost Software License,
  // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  
  //[boost_polygon_box
  //`Shows how to use Boost.Polygon rectangle_data within Boost.Geometry
  
  #include <iostream>
  #include <boost/geometry.hpp>
  #include <boost/geometry/geometries/adapted/boost_polygon.hpp>
  
  int main()
  {
      typedef boost::polygon::rectangle_data<int> rect;
  
      rect b = boost::polygon::construct<rect>(1, 2, 3, 4);
  
      std::cout << "Area (using Boost.Geometry): "
          << boost::geometry::area(b) << std::endl;
      std::cout << "Area (using Boost.Polygon): "
          << boost::polygon::area(b) << std::endl;
  
      return 0;
  }
  
  //]
  
  //[boost_polygon_box_output
  /*`
  Output:
  [pre
  Area (using Boost.Geometry): 4
  Area (using Boost.Polygon): 4
  ]
  */
  //]
  