text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //  Adaptation to Boost of the libcxx
  //  Copyright 2010 Vicente J. Botet Escriba
  //  Distributed under the Boost Software License, Version 1.0.
  //  See http://www.boost.org/LICENSE_1_0.txt
  
  #include <boost/chrono/chrono.hpp>
  #include <boost/type_traits.hpp>
  
  #if !defined(BOOST_NO_CXX11_STATIC_ASSERT)
  #define NOTHING ""
  #endif
  
  template <class D1, class D2, class De>
  void
  test()
  {
      typedef boost::chrono::system_clock C;
      typedef boost::chrono::time_point<C, D1> T1;
      typedef boost::chrono::time_point<C, D2> T2;
      typedef boost::chrono::time_point<C, De> Te;
      typedef typename boost::common_type<T1, T2>::type Tc;
      BOOST_CHRONO_STATIC_ASSERT((boost::is_same<Tc, Te>::value), NOTHING, (T1, T2, Tc, Te));
  }
  
  void testall()
  {
      test<boost::chrono::duration<int, boost::ratio<1, 100> >,
           boost::chrono::duration<long, boost::ratio<1, 1000> >,
           boost::chrono::duration<long, boost::ratio<1, 1000> > >();
      test<boost::chrono::duration<long, boost::ratio<1, 100> >,
           boost::chrono::duration<int, boost::ratio<1, 1000> >,
           boost::chrono::duration<long, boost::ratio<1, 1000> > >();
      test<boost::chrono::duration<char, boost::ratio<1, 30> >,
           boost::chrono::duration<short, boost::ratio<1, 1000> >,
           boost::chrono::duration<int, boost::ratio<1, 3000> > >();
      test<boost::chrono::duration<double, boost::ratio<21, 1> >,
           boost::chrono::duration<short, boost::ratio<15, 1> >,
           boost::chrono::duration<double, boost::ratio<3, 1> > >();
  }
  