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3rdparty/boost_1_81_0/boost/python/back_reference.hpp 1.43 KB
0b6a182c   Hu Chunming   添加无鉴权注册和注销
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  // Copyright David Abrahams 2002.
  // Distributed under 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)
  #ifndef BACK_REFERENCE_DWA2002510_HPP
  # define BACK_REFERENCE_DWA2002510_HPP
  
  # include <boost/python/detail/prefix.hpp>
  
  # include <boost/python/object_fwd.hpp>
  # include <boost/python/detail/dependent.hpp>
  # include <boost/python/detail/raw_pyobject.hpp>
  
  namespace boost { namespace python { 
  
  template <class T>
  struct back_reference
  {
   private: // types
      typedef typename detail::dependent<object,T>::type source_t;
   public:
      typedef T type;
      
      back_reference(PyObject*, T);
      source_t const& source() const;
      T get() const;
   private:
      source_t m_source;
      T m_value;
  };
  
  template<typename T>
  class is_back_reference
  {
   public:
      BOOST_STATIC_CONSTANT(bool, value = false); 
  };
  
  template<typename T>
  class is_back_reference<back_reference<T> >
  {
   public:
      BOOST_STATIC_CONSTANT(bool, value = true);
  };
  
  
  //
  // implementations
  //
  template <class T>
  back_reference<T>::back_reference(PyObject* p, T x)
      : m_source(detail::borrowed_reference(p))
        , m_value(x)
  {
  }
  
  template <class T>
  typename back_reference<T>::source_t const& back_reference<T>::source() const
  {
      return m_source;
  }
  
  template <class T>
  T back_reference<T>::get() const
  {
      return m_value;
  }
  
  }} // namespace boost::python
  
  #endif // BACK_REFERENCE_DWA2002510_HPP