unique_ptr.h

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/***************************************************************************
 * include/stxxl/bits/compat/unique_ptr.h
 *
 * compatibility interface to unique_ptr (C++0x), previously auto_ptr
 *
 * Part of the STXXL. See http://stxxl.sourceforge.net
 *
 * Copyright (C) 2008 Andreas Beckmann <[email protected]>
 *
 * 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 STXXL_COMPAT_UNIQUE_PTR_HEADER
#define STXXL_COMPAT_UNIQUE_PTR_HEADER


#include <memory>
#include <stxxl/bits/namespace.h>


STXXL_BEGIN_NAMESPACE

template <class _Tp>
struct compat_unique_ptr {
#if defined(__GXX_EXPERIMENTAL_CXX0X__) && ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= 40400)
 typedef std::unique_ptr<_Tp> result;
#else
 // auto_ptr is inherently broken and is deprecated by unique_ptr in c++0x
 typedef std::auto_ptr<_Tp> result;
#endif
};

STXXL_END_NAMESPACE

#if defined(__GNUG__) && ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100) == 30400)

namespace workaround_gcc_3_4 {

// std::swap in gcc 3.4 is broken, __tmp is declared const there
template <typename _Tp>
inline void
swap(_Tp& __a, _Tp& __b)
{
 // concept requirements
 __glibcxx_function_requires(_SGIAssignableConcept<_Tp>)

 _Tp __tmp = __a;
 __a = __b;
 __b = __tmp;
}

} // namespace workaround_gcc_3_4

namespace std {

// overload broken std::swap<auto_ptr> to call a working swap()
template <typename _Tp>
inline void swap(std::auto_ptr<_Tp>& a, std::auto_ptr<_Tp>& b)
{
 workaround_gcc_3_4::swap(a, b);
}

} // namespace std

#endif

#endif // !STXXL_COMPAT_UNIQUE_PTR_HEADER