129 lines
2.5 KiB
C++
129 lines
2.5 KiB
C++
|
#ifndef PTR_DWA20020601_HPP
|
||
|
|
# define PTR_DWA20020601_HPP
|
||
|
|
|
||
|
|
# include <boost/python/detail/prefix.hpp>
|
||
|
|
// 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)
|
||
|
|
//
|
||
|
|
// Based on boost/ref.hpp, thus:
|
||
|
|
// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
|
||
|
|
// Copyright (C) 2001 Peter Dimov
|
||
|
|
|
||
|
|
# if _MSC_VER+0 >= 1020
|
||
|
|
# pragma once
|
||
|
|
# endif
|
||
|
|
|
||
|
|
# include <boost/config.hpp>
|
||
|
|
# include <boost/mpl/bool.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace python {
|
||
|
|
|
||
|
|
template<class Ptr> class pointer_wrapper
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef Ptr type;
|
||
|
|
|
||
|
|
explicit pointer_wrapper(Ptr x): p_(x) {}
|
||
|
|
operator Ptr() const { return p_; }
|
||
|
|
Ptr get() const { return p_; }
|
||
|
|
private:
|
||
|
|
Ptr p_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
inline pointer_wrapper<T> ptr(T t)
|
||
|
|
{
|
||
|
|
return pointer_wrapper<T>(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||
|
|
template<typename T>
|
||
|
|
class is_pointer_wrapper
|
||
|
|
: public mpl::false_
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class is_pointer_wrapper<pointer_wrapper<T> >
|
||
|
|
: public mpl::true_
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class unwrap_pointer
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef T type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class unwrap_pointer<pointer_wrapper<T> >
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef T type;
|
||
|
|
};
|
||
|
|
# else // no partial specialization
|
||
|
|
|
||
|
|
}} // namespace boost::python
|
||
|
|
|
||
|
|
#include <boost/type.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace python {
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
typedef char (&yes_pointer_wrapper_t)[1];
|
||
|
|
typedef char (&no_pointer_wrapper_t)[2];
|
||
|
|
|
||
|
|
no_pointer_wrapper_t is_pointer_wrapper_test(...);
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
yes_pointer_wrapper_t is_pointer_wrapper_test(boost::type< pointer_wrapper<T> >);
|
||
|
|
|
||
|
|
template<bool wrapped>
|
||
|
|
struct pointer_unwrapper
|
||
|
|
{
|
||
|
|
template <class T>
|
||
|
|
struct apply
|
||
|
|
{
|
||
|
|
typedef T type;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct pointer_unwrapper<true>
|
||
|
|
{
|
||
|
|
template <class T>
|
||
|
|
struct apply
|
||
|
|
{
|
||
|
|
typedef typename T::type type;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class is_pointer_wrapper
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
BOOST_STATIC_CONSTANT(
|
||
|
|
bool, value = (
|
||
|
|
sizeof(detail::is_pointer_wrapper_test(boost::type<T>()))
|
||
|
|
== sizeof(detail::yes_pointer_wrapper_t)));
|
||
|
|
typedef mpl::bool_<value> type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
class unwrap_pointer
|
||
|
|
: public detail::pointer_unwrapper<
|
||
|
|
is_pointer_wrapper<T>::value
|
||
|
|
>::template apply<T>
|
||
|
|
{};
|
||
|
|
|
||
|
|
# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||
|
|
|
||
|
|
}} // namespace boost::python
|
||
|
|
|
||
|
|
#endif // #ifndef PTR_DWA20020601_HPP
|