1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/epoc32/include/stdapis/boost/ptr_container/detail/move.hpp Wed Mar 31 12:27:01 2010 +0100
1.3 @@ -0,0 +1,166 @@
1.4 +//-----------------------------------------------------------------------------
1.5 +// boost variant/detail/move.hpp header file
1.6 +// See http://www.boost.org for updates, documentation, and revision history.
1.7 +//-----------------------------------------------------------------------------
1.8 +//
1.9 +// Copyright (c) 2002-2003 Eric Friedman
1.10 +// Copyright (c) 2002 by Andrei Alexandrescu
1.11 +//
1.12 +// Use, modification and distribution are subject to the
1.13 +// Boost Software License, Version 1.0. (See accompanying file
1.14 +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
1.15 +//
1.16 +// This file derivative of MoJO. Much thanks to Andrei for his initial work.
1.17 +// See <http://www.cuj.com/experts/2102/alexandr.htm> for information on MOJO.
1.18 +// Re-issued here under the Boost Software License, with permission of the original
1.19 +// author (Andrei Alexandrescu).
1.20 +
1.21 +
1.22 +#ifndef BOOST_VARIANT_DETAIL_MOVE_HPP
1.23 +#define BOOST_VARIANT_DETAIL_MOVE_HPP
1.24 +
1.25 +#include <iterator> // for iterator_traits
1.26 +#include <new> // for placement new
1.27 +
1.28 +#include "boost/config.hpp"
1.29 +#include "boost/detail/workaround.hpp"
1.30 +#include "boost/mpl/if.hpp"
1.31 +#include "boost/type_traits/is_base_and_derived.hpp"
1.32 +
1.33 +namespace boost {
1.34 +namespace detail { namespace variant {
1.35 +
1.36 +//////////////////////////////////////////////////////////////////////////
1.37 +// forward declares
1.38 +//
1.39 +// NOTE: Incomplete until (if?) Boost.Move becomes part of Boost.
1.40 +//
1.41 +template <typename Deriving> class moveable;
1.42 +template <typename T> class move_source;
1.43 +template <typename T> class move_return;
1.44 +
1.45 +namespace detail {
1.46 +
1.47 +// (detail) moveable_tag
1.48 +//
1.49 +// Concrete type from which moveable<T> derives.
1.50 +//
1.51 +// TODO: Move into moveable_fwd.hpp and define has_move_constructor.
1.52 +//
1.53 +template <typename Deriving>
1.54 +struct moveable_tag
1.55 +{
1.56 +};
1.57 +
1.58 +} // namespace detail
1.59 +
1.60 +//////////////////////////////////////////////////////////////////////////
1.61 +// function template move
1.62 +//
1.63 +// Takes a T& and returns, if T derives moveable<T>, a move_source<T> for
1.64 +// the object; else, returns the T&.
1.65 +//
1.66 +
1.67 +namespace detail {
1.68 +
1.69 +// (detail) class template move_type
1.70 +//
1.71 +// Metafunction that, given moveable T, provides move_source<T>, else T&.
1.72 +//
1.73 +template <typename T>
1.74 +struct move_type
1.75 +{
1.76 +public: // metafunction result
1.77 +
1.78 + typedef typename mpl::if_<
1.79 + is_base_and_derived<detail::moveable_tag<T>, T>
1.80 + , move_source<T>
1.81 + , T&
1.82 + >::type type;
1.83 +
1.84 +};
1.85 +
1.86 +} // namespace detail
1.87 +
1.88 +template <typename T>
1.89 +inline
1.90 + typename detail::move_type<T>::type
1.91 +move(T& source)
1.92 +{
1.93 + typedef typename detail::move_type<T>::type
1.94 + move_t;
1.95 +
1.96 + return move_t(source);
1.97 +}
1.98 +
1.99 +//////////////////////////////////////////////////////////////////////////
1.100 +// class template return_t
1.101 +//
1.102 +// Metafunction that, given moveable T, provides move_return<T>, else T.
1.103 +//
1.104 +template <typename T>
1.105 +struct return_t
1.106 +{
1.107 +public: // metafunction result
1.108 +
1.109 + typedef typename mpl::if_<
1.110 + is_base_and_derived<moveable<T>, T>
1.111 + , move_return<T>
1.112 + , T
1.113 + >::type type;
1.114 +
1.115 +};
1.116 +
1.117 +//////////////////////////////////////////////////////////////////////////
1.118 +// function template move_swap
1.119 +//
1.120 +// Swaps using Koenig lookup but falls back to move-swap for primitive
1.121 +// types and on non-conforming compilers.
1.122 +//
1.123 +
1.124 +#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP) \
1.125 + || BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(2))
1.126 +
1.127 +// [Indicate that move_swap by overload is disabled...]
1.128 +#define BOOST_NO_MOVE_SWAP_BY_OVERLOAD
1.129 +
1.130 +// [...and provide straight swap-by-move implementation:]
1.131 +template <typename T>
1.132 +inline void move_swap(T& lhs, T& rhs)
1.133 +{
1.134 + T tmp( boost::detail::variant::move(lhs) );
1.135 + lhs = boost::detail::variant::move(rhs);
1.136 + rhs = boost::detail::variant::move(tmp);
1.137 +}
1.138 +
1.139 +#else// !workaround
1.140 +
1.141 +namespace detail { namespace move_swap {
1.142 +
1.143 +template <typename T>
1.144 +inline void swap(T& lhs, T& rhs)
1.145 +{
1.146 + T tmp( boost::detail::variant::move(lhs) );
1.147 + lhs = boost::detail::variant::move(rhs);
1.148 + rhs = boost::detail::variant::move(tmp);
1.149 +}
1.150 +
1.151 +}} // namespace detail::move_swap
1.152 +
1.153 +template <typename T>
1.154 +inline void move_swap(T& lhs, T& rhs)
1.155 +{
1.156 + using detail::move_swap::swap;
1.157 +
1.158 + swap(lhs, rhs);
1.159 +}
1.160 +
1.161 +#endif // workaround
1.162 +
1.163 +}} // namespace detail::variant
1.164 +} // namespace boost
1.165 +
1.166 +#endif // BOOST_VARIANT_DETAIL_MOVE_HPP
1.167 +
1.168 +
1.169 +