1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/epoc32/include/tools/stlport/stl/_move_construct_fwk.h Wed Mar 31 12:33:34 2010 +0100
1.3 @@ -0,0 +1,160 @@
1.4 +/*
1.5 + *
1.6 + * Copyright (c) 2003
1.7 + * François Dumont
1.8 + *
1.9 + * This material is provided "as is", with absolutely no warranty expressed
1.10 + * or implied. Any use is at your own risk.
1.11 + *
1.12 + * Permission to use or copy this software for any purpose is hereby granted
1.13 + * without fee, provided the above notices are retained on all copies.
1.14 + * Permission to modify the code and to distribute modified code is granted,
1.15 + * provided the above notices are retained, and a notice that the code was
1.16 + * modified is included with the above copyright notice.
1.17 + *
1.18 + */
1.19 +
1.20 +#ifndef _STLP_MOVE_CONSTRUCT_FWK_H
1.21 +#define _STLP_MOVE_CONSTRUCT_FWK_H
1.22 +
1.23 +#ifndef _STLP_TYPE_TRAITS_H
1.24 +# include <stl/type_traits.h>
1.25 +#endif
1.26 +
1.27 +_STLP_BEGIN_NAMESPACE
1.28 +
1.29 +/*************************************************************
1.30 + * Move constructor framework
1.31 + *************************************************************/
1.32 +
1.33 +/*************************************************************
1.34 + *Partial move:
1.35 + *The source HAS to be a valid instance after the move!
1.36 + *************************************************************/
1.37 +template <class _Tp>
1.38 +class __move_source {
1.39 +public:
1.40 + explicit __move_source (_Tp &_src) : _M_data(_src)
1.41 + {}
1.42 +
1.43 + _Tp& get() const
1.44 + { return _M_data; }
1.45 +private:
1.46 + _Tp &_M_data;
1.47 +
1.48 + //We explicitely forbid assignment to avoid warning:
1.49 + typedef __move_source<_Tp> _Self;
1.50 + _Self& operator = (_Self const&);
1.51 +};
1.52 +
1.53 +//Class used to signal move constructor support, implementation and type.
1.54 +template <class _Tp>
1.55 +struct __move_traits {
1.56 + /*
1.57 + * implemented tells if a the special move constructor has to be called or the classic
1.58 + * copy constructor is just fine. Most of the time the copy constructor is fine only
1.59 + * if the following info is true.
1.60 + */
1.61 +#if defined (_STLP_USE_PARTIAL_SPEC_WORKAROUND) && \
1.62 + !defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && \
1.63 + !defined (_STLP_NO_MOVE_SEMANTIC)
1.64 + typedef typename _IsSTLportClass<_Tp>::_Ret implemented;
1.65 +#else
1.66 + typedef __false_type implemented;
1.67 +#endif
1.68 + /*
1.69 + * complete tells if the move is complete or partial, that is to say, does the source
1.70 + * needs to be destroyed once it has been moved.
1.71 + */
1.72 + typedef typename __type_traits<_Tp>::has_trivial_destructor complete;
1.73 +};
1.74 +
1.75 +#if !defined (_STLP_NO_MOVE_SEMANTIC)
1.76 +typedef __true_type __stlp_movable;
1.77 +#else
1.78 +typedef __false_type __stlp_movable;
1.79 +#endif
1.80 +
1.81 +_STLP_MOVE_TO_PRIV_NAMESPACE
1.82 +
1.83 +/*
1.84 + * This struct should never be used if the user has not explicitely stipulated
1.85 + * that its class support the full move concept. To check that the return type
1.86 + * in such a case will be __invalid_source<_Tp> to generate a compile error
1.87 + * revealing the configuration problem.
1.88 + */
1.89 +template <class _Tp>
1.90 +struct _MoveSourceTraits {
1.91 + typedef typename __move_traits<_Tp>::implemented _MvImpRet;
1.92 +#if defined (__BORLANDC__)
1.93 + typedef typename __selectT<_MvImpRet,
1.94 +#else
1.95 + enum {_MvImp = __type2bool<_MvImpRet>::_Ret};
1.96 + typedef typename __select<_MvImp,
1.97 +#endif
1.98 + __move_source<_Tp>,
1.99 + _Tp const&>::_Ret _Type;
1.100 +};
1.101 +
1.102 +//The helper function
1.103 +template <class _Tp>
1.104 +inline _STLP_TYPENAME_ON_RETURN_TYPE _MoveSourceTraits<_Tp>::_Type
1.105 +_AsMoveSource (_Tp &src) {
1.106 + typedef typename _MoveSourceTraits<_Tp>::_Type _SrcType;
1.107 + return _SrcType(src);
1.108 +}
1.109 +
1.110 +//Helper structs used for many class.
1.111 +template <class _Tp>
1.112 +struct __move_traits_aux {
1.113 + typedef typename __move_traits<_Tp>::implemented implemented;
1.114 + typedef typename __move_traits<_Tp>::complete complete;
1.115 +};
1.116 +
1.117 +template <class _Tp1, class _Tp2>
1.118 +struct __move_traits_aux2 {
1.119 + typedef __move_traits<_Tp1> _MoveTraits1;
1.120 + typedef __move_traits<_Tp2> _MoveTraits2;
1.121 +
1.122 + typedef typename _Lor2<typename _MoveTraits1::implemented,
1.123 + typename _MoveTraits2::implemented>::_Ret implemented;
1.124 + typedef typename _Land2<typename _MoveTraits1::complete,
1.125 + typename _MoveTraits2::complete>::_Ret complete;
1.126 +};
1.127 +
1.128 +/*
1.129 + * Most of the time a class implement a move constructor but its use depends
1.130 + * on a third party, this is what the following struct are for.
1.131 + */
1.132 +template <class _Tp>
1.133 +struct __move_traits_help {
1.134 + typedef __true_type implemented;
1.135 + typedef typename __move_traits<_Tp>::complete complete;
1.136 +};
1.137 +
1.138 +template <class _Tp1, class _Tp2>
1.139 +struct __move_traits_help1 {
1.140 + typedef __move_traits<_Tp1> _MoveTraits1;
1.141 + typedef __move_traits<_Tp2> _MoveTraits2;
1.142 +
1.143 + typedef typename _Lor2<typename _MoveTraits1::implemented,
1.144 + typename _MoveTraits2::implemented>::_Ret implemented;
1.145 + typedef typename _Land2<typename _MoveTraits1::complete,
1.146 + typename _MoveTraits2::complete>::_Ret complete;
1.147 +};
1.148 +
1.149 +template <class _Tp1, class _Tp2>
1.150 +struct __move_traits_help2 {
1.151 + typedef __move_traits<_Tp1> _MoveTraits1;
1.152 + typedef __move_traits<_Tp2> _MoveTraits2;
1.153 +
1.154 + typedef __stlp_movable implemented;
1.155 + typedef typename _Land2<typename _MoveTraits1::complete,
1.156 + typename _MoveTraits2::complete>::_Ret complete;
1.157 +};
1.158 +
1.159 +_STLP_MOVE_TO_STD_NAMESPACE
1.160 +
1.161 +_STLP_END_NAMESPACE
1.162 +
1.163 +#endif /* _STLP_MOVE_CONSTRUCT_FWK_H */