// 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 REFERENT_STORAGE_DWA200278_HPP

# define REFERENT_STORAGE_DWA200278_HPP

# include <boost/mpl/if.hpp>

# include <boost/type_traits/aligned_storage.hpp>

# include <cstddef>

namespace boost { namespace python { namespace detail {

template <std::size_t size, std::size_t alignment = std::size_t(-1)>

struct aligned_storage

{

union type

{

typename ::boost::aligned_storage<size, alignment>::type data;

char bytes[size];

};

};

// Compute the size of T's referent. We wouldn't need this at all,

// but sizeof() is broken in CodeWarriors <= 8.0

template <class T> struct referent_size;

template <class T>

struct referent_size<T&>

{

BOOST_STATIC_CONSTANT(

std::size_t, value = sizeof(T));

};

// A metafunction returning a POD type which can store U, where T ==

// U&. If T is not a reference type, returns a POD which can store T.

template <class T>

struct referent_storage

{

typedef typename aligned_storage<referent_size<T>::value, alignment_of<T>::value>::type type;

};

}}} // namespace boost::python::detail

#endif // REFERENT_STORAGE_DWA200278_HPP