ceph/src/boost/libs/python/test/select_holder.cpp

   1 // Copyright David Abrahams 2002.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #include <boost/python/object/class_metadata.hpp>
   6 #include <boost/python/has_back_reference.hpp>
   7 #include <boost/python/detail/not_specified.hpp>
   8 #include <boost/static_assert.hpp>
   9 #include <boost/type_traits/same_traits.hpp>
  10 #include <boost/function/function0.hpp>
  11 #include <boost/mpl/bool.hpp>
  12 #include <memory>
  13
  14 struct BR {};
  15
  16 struct Base {};
  17 struct Derived : Base {};
  18
  19 namespace boost { namespace python
  20 {
  21   // specialization
  22   template <>
  23   struct has_back_reference<BR>
  24     : mpl::true_
  25   {
  26   };
  27 }} // namespace boost::python
  28
  29 template <class T, class U>
  30 void assert_same(U* = 0, T* = 0)
  31 {
  32     BOOST_STATIC_ASSERT((boost::is_same<T,U>::value));
  33
  34 }
  35
  36 template <class T, class Held, class Holder>
  37 void assert_holder(T* = 0, Held* = 0, Holder* = 0)
  38 {
  39     using namespace boost::python::detail;
  40     using namespace boost::python::objects;
  41
  42     typedef typename class_metadata<
  43        T,Held,not_specified,not_specified
  44            >::holder h;
  45
  46     assert_same<Holder>(
  47         (h*)0
  48     );
  49 }
  50
  51 int test_main(int, char * [])
  52 {
  53     using namespace boost::python::detail;
  54     using namespace boost::python::objects;
  55
  56     assert_holder<Base,not_specified,value_holder<Base> >();
  57
  58     assert_holder<BR,not_specified,value_holder_back_reference<BR,BR> >();
  59     assert_holder<Base,Base,value_holder_back_reference<Base,Base> >();
  60     assert_holder<BR,BR,value_holder_back_reference<BR,BR> >();
  61
  62     assert_holder<Base,Derived
  63         ,value_holder_back_reference<Base,Derived> >();
  64
  65     assert_holder<Base,std::auto_ptr<Base>
  66         ,pointer_holder<std::auto_ptr<Base>,Base> >();
  67
  68     assert_holder<Base,std::auto_ptr<Derived>
  69         ,pointer_holder_back_reference<std::auto_ptr<Derived>,Base> >();
  70
  71     assert_holder<BR,std::auto_ptr<BR>
  72         ,pointer_holder_back_reference<std::auto_ptr<BR>,BR> > ();
  73
  74     return 0;
  75 }
  76