1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/python/cast.hpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,106 @@
     1.4 +// Copyright David Abrahams 2002.
     1.5 +// Distributed under the Boost Software License, Version 1.0. (See
     1.6 +// accompanying file LICENSE_1_0.txt or copy at
     1.7 +// http://www.boost.org/LICENSE_1_0.txt)
     1.8 +#ifndef CAST_DWA200269_HPP
     1.9 +# define CAST_DWA200269_HPP
    1.10 +
    1.11 +# include <boost/python/detail/prefix.hpp>
    1.12 +
    1.13 +# include <boost/type_traits/same_traits.hpp>
    1.14 +# include <boost/type_traits/cv_traits.hpp>
    1.15 +# include <boost/type.hpp>
    1.16 +# include <boost/python/base_type_traits.hpp>
    1.17 +# include <boost/python/detail/convertible.hpp>
    1.18 +
    1.19 +namespace boost { namespace python { 
    1.20 +
    1.21 +namespace detail
    1.22 +{
    1.23 +  template <class Source, class Target> inline Target* upcast_impl(Source*, Target*);
    1.24 +  
    1.25 +  template <class Source, class Target>
    1.26 +  inline Target* upcast(Source* p, yes_convertible, no_convertible, Target*)
    1.27 +  {
    1.28 +      return p;
    1.29 +  }
    1.30 +
    1.31 +  template <class Source, class Target>
    1.32 +  inline Target* upcast(Source* p, no_convertible, no_convertible, Target*)
    1.33 +  {
    1.34 +      typedef typename base_type_traits<Source>::type base;
    1.35 +      
    1.36 +      return detail::upcast_impl((base*)p, (Target*)0);
    1.37 +  }
    1.38 +
    1.39 +  template <bool is_same = true>
    1.40 +  struct upcaster
    1.41 +  {
    1.42 +      template <class T>
    1.43 +      static inline T* execute(T* x, T*) { return x; }
    1.44 +  };
    1.45 +  
    1.46 +  template <>
    1.47 +  struct upcaster<false>
    1.48 +  {
    1.49 +      template <class Source, class Target>
    1.50 +      static inline Target* execute(Source* x, Target*)
    1.51 +      {
    1.52 +          return detail::upcast(
    1.53 +              x, detail::convertible<Target*>::check(x)
    1.54 +              , detail::convertible<Source*>::check((Target*)0)
    1.55 +              , (Target*)0);
    1.56 +      }
    1.57 +  };
    1.58 +
    1.59 +
    1.60 +  template <class Target, class Source>
    1.61 +  inline Target* downcast(Source* p, yes_convertible)
    1.62 +  {
    1.63 +      return static_cast<Target*>(p);
    1.64 +  }
    1.65 +
    1.66 +  template <class Target, class Source>
    1.67 +  inline Target* downcast(Source* p, no_convertible, boost::type<Target>* = 0)
    1.68 +  {
    1.69 +      typedef typename base_type_traits<Source>::type base;
    1.70 +      return (Target*)detail::downcast<base>(p, convertible<Source*>::check((base*)0));
    1.71 +  }
    1.72 +
    1.73 +  template <class T>
    1.74 +  inline void assert_castable(boost::type<T>* = 0)
    1.75 +  {
    1.76 +      typedef char must_be_a_complete_type[sizeof(T)];
    1.77 +  }
    1.78 +
    1.79 +  template <class Source, class Target>
    1.80 +  inline Target* upcast_impl(Source* x, Target*)
    1.81 +  {
    1.82 +      typedef typename add_cv<Source>::type src_t;
    1.83 +      typedef typename add_cv<Target>::type target_t;
    1.84 +      bool const same = is_same<src_t,target_t>::value;
    1.85 +      
    1.86 +      return detail::upcaster<same>::execute(x, (Target*)0);
    1.87 +  }
    1.88 +}
    1.89 +
    1.90 +template <class Target, class Source>
    1.91 +inline Target* upcast(Source* x, Target* = 0)
    1.92 +{
    1.93 +    detail::assert_castable<Source>();
    1.94 +    detail::assert_castable<Target>();
    1.95 +    return detail::upcast_impl(x, (Target*)0);
    1.96 +    
    1.97 +}
    1.98 +
    1.99 +template <class Target, class Source>
   1.100 +inline Target* downcast(Source* x, Target* = 0)
   1.101 +{
   1.102 +    detail::assert_castable<Source>();
   1.103 +    detail::assert_castable<Target>();
   1.104 +    return detail::downcast<Target>(x, detail::convertible<Source*>::check((Target*)0));
   1.105 +}
   1.106 +
   1.107 +}} // namespace boost::python
   1.108 +
   1.109 +#endif // CAST_DWA200269_HPP