ceph/src/boost/libs/python/include/boost/python/ptr.hpp

   1 #ifndef PTR_DWA20020601_HPP
   2 # define PTR_DWA20020601_HPP
   3
   4 # include <boost/python/detail/prefix.hpp>
   5 // Copyright David Abrahams 2002.
   6 // Distributed under the Boost Software License, Version 1.0. (See
   7 // accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10 // Based on boost/ref.hpp, thus:
  11 //  Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
  12 //  Copyright (C) 2001 Peter Dimov
  13
  14 # pragma once
  15
  16 # include <boost/config.hpp>
  17 # include <boost/mpl/bool.hpp>
  18
  19 namespace boost { namespace python {
  20
  21 template<class Ptr> class pointer_wrapper
  22 {
  23  public:
  24     typedef Ptr type;
  25
  26     explicit pointer_wrapper(Ptr x): p_(x) {}
  27     operator Ptr() const { return p_; }
  28     Ptr get() const { return p_; }
  29  private:
  30     Ptr p_;
  31 };
  32
  33 template<class T>
  34 inline pointer_wrapper<T> ptr(T t)
  35 {
  36     return pointer_wrapper<T>(t);
  37 }
  38
  39 template<typename T>
  40 class is_pointer_wrapper
  41     : public mpl::false_
  42 {
  43 };
  44
  45 template<typename T>
  46 class is_pointer_wrapper<pointer_wrapper<T> >
  47     : public mpl::true_
  48 {
  49 };
  50
  51 template<typename T>
  52 class unwrap_pointer
  53 {
  54  public:
  55     typedef T type;
  56 };
  57
  58 template<typename T>
  59 class unwrap_pointer<pointer_wrapper<T> >
  60 {
  61  public:
  62     typedef T type;
  63 };
  64
  65 }} // namespace boost::python
  66
  67 #endif // #ifndef PTR_DWA20020601_HPP