boost/python/ptr.hpp

0001 #ifndef BOOST_PYTHON_PTR_HPP
0002 # define BOOST_PYTHON_PTR_HPP
0003
0004 # include <boost/python/detail/prefix.hpp>
0005 // Copyright David Abrahams 2002.
0006 // Distributed under the Boost Software License, Version 1.0. (See
0007 // accompanying file LICENSE_1_0.txt or copy at
0008 // http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010 // Based on boost/ref.hpp, thus:
0011 //  Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
0012 //  Copyright (C) 2001 Peter Dimov
0013
0014 # include <boost/config.hpp>
0015 # include <boost/mpl/bool.hpp>
0016
0017 namespace boost { namespace python {
0018
0019 template<class Ptr> class pointer_wrapper
0020 {
0021  public:
0022     typedef Ptr type;
0023
0024     explicit pointer_wrapper(Ptr x): p_(x) {}
0025     operator Ptr() const { return p_; }
0026     Ptr get() const { return p_; }
0027  private:
0028     Ptr p_;
0029 };
0030
0031 template<class T>
0032 inline pointer_wrapper<T> ptr(T t)
0033 {
0034     return pointer_wrapper<T>(t);
0035 }
0036
0037 template<typename T>
0038 class is_pointer_wrapper
0039     : public mpl::false_
0040 {
0041 };
0042
0043 template<typename T>
0044 class is_pointer_wrapper<pointer_wrapper<T> >
0045     : public mpl::true_
0046 {
0047 };
0048
0049 template<typename T>
0050 class unwrap_pointer
0051 {
0052  public:
0053     typedef T type;
0054 };
0055
0056 template<typename T>
0057 class unwrap_pointer<pointer_wrapper<T> >
0058 {
0059  public:
0060     typedef T type;
0061 };
0062
0063 }} // namespace boost::python
0064
0065 #endif