python/include/boost/python/to_python_indirect.hpp at develop · jwakely/python · GitHub

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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 TO_PYTHON_INDIRECT_DWA200221_HPP

# define TO_PYTHON_INDIRECT_DWA200221_HPP

# include <boost/python/detail/prefix.hpp>

# include <boost/python/object/pointer_holder.hpp>

# include <boost/python/object/make_ptr_instance.hpp>

# include <boost/python/detail/none.hpp>

#ifndef BOOST_PYTHON_NO_PY_SIGNATURES

# include <boost/python/converter/pytype_function.hpp>

#endif

# include <boost/python/refcount.hpp>

# include <boost/type_traits/is_pointer.hpp>

# include <boost/type_traits/is_polymorphic.hpp>

# include <boost/mpl/bool.hpp>

# if defined(__ICL) && __ICL < 600

# include <boost/shared_ptr.hpp>

# else

# include <memory>

# endif

namespace boost { namespace python {

template <class T, class MakeHolder>

struct to_python_indirect

{

template <class U>

inline PyObject*

operator()(U const& ref) const

{

return this->execute(const_cast<U&>(ref), is_pointer<U>());

}

#ifndef BOOST_PYTHON_NO_PY_SIGNATURES

inline PyTypeObject const*

get_pytype()const

{

return converter::registered_pytype<T>::get_pytype();

}

#endif

private:

template <class U>

inline PyObject* execute(U* ptr, mpl::true_) const

{

// No special NULL treatment for references

if (ptr == 0)

return python::detail::none();

else

return this->execute(*ptr, mpl::false_());

}

template <class U>

inline PyObject* execute(U const& x, mpl::false_) const

{

U* const p = &const_cast<U&>(x);

if (is_polymorphic<U>::value)

{

if (PyObject* o = detail::wrapper_base_::owner(p))

return incref(o);

}

return MakeHolder::execute(p);

}

};

// implementations

namespace detail

{

struct make_owning_holder

{

template <class T>

static PyObject* execute(T* p)

{

// can't use auto_ptr with Intel 5 and VC6 Dinkum library

// for some reason. We get link errors against the auto_ptr

// copy constructor.

# if defined(__ICL) && __ICL < 600

typedef boost::shared_ptr<T> smart_pointer;

# else

typedef std::auto_ptr<T> smart_pointer;

# endif

typedef objects::pointer_holder<smart_pointer, T> holder_t;

smart_pointer ptr(const_cast<T*>(p));

return objects::make_ptr_instance<T, holder_t>::execute(ptr);

}

};

struct make_reference_holder

{

template <class T>

static PyObject* execute(T* p)

{

typedef objects::pointer_holder<T*, T> holder_t;

T* q = const_cast<T*>(p);

return objects::make_ptr_instance<T, holder_t>::execute(q);

}

};

}

}} // namespace boost::python

#endif // TO_PYTHON_INDIRECT_DWA200221_HPP

python/include/boost/python/to_python_indirect.hpp at develop · jwakely/python · GitHub

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