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      1 /*
      2  *
      3  * Copyright (c) 1996,1997
      4  * Silicon Graphics Computer Systems, Inc.
      5  *
      6  * Copyright (c) 1997
      7  * Moscow Center for SPARC Technology
      8  *
      9  * Copyright (c) 1999
     10  * Boris Fomitchev
     11  *
     12  * This material is provided "as is", with absolutely no warranty expressed
     13  * or implied. Any use is at your own risk.
     14  *
     15  * Permission to use or copy this software for any purpose is hereby granted
     16  * without fee, provided the above notices are retained on all copies.
     17  * Permission to modify the code and to distribute modified code is granted,
     18  * provided the above notices are retained, and a notice that the code was
     19  * modified is included with the above copyright notice.
     20  *
     21  */
     22 
     23 /* NOTE: This is an internal header file, included by other STL headers.
     24  *   You should not attempt to use it directly.
     25  */
     26 
     27 #ifndef _STLP_INTERNAL_SLIST_H
     28 #define _STLP_INTERNAL_SLIST_H
     29 
     30 #ifndef _STLP_INTERNAL_ALGOBASE_H
     31 #  include <stl/_algobase.h>
     32 #endif
     33 
     34 #ifndef _STLP_INTERNAL_ALLOC_H
     35 #  include <stl/_alloc.h>
     36 #endif
     37 
     38 #ifndef _STLP_INTERNAL_ITERATOR_H
     39 #  include <stl/_iterator.h>
     40 #endif
     41 
     42 #ifndef _STLP_INTERNAL_CONSTRUCT_H
     43 #  include <stl/_construct.h>
     44 #endif
     45 
     46 #ifndef _STLP_INTERNAL_FUNCTION_BASE_H
     47 #  include <stl/_function_base.h>
     48 #endif
     49 
     50 #ifndef _STLP_INTERNAL_SLIST_BASE_H
     51 #  include <stl/_slist_base.h>
     52 #endif
     53 
     54 _STLP_BEGIN_NAMESPACE
     55 
     56 _STLP_MOVE_TO_PRIV_NAMESPACE
     57 
     58 template <class _Tp>
     59 class _Slist_node : public _Slist_node_base {
     60 public:
     61   _Tp _M_data;
     62   __TRIVIAL_STUFF(_Slist_node)
     63 };
     64 
     65 struct _Slist_iterator_base {
     66   typedef size_t               size_type;
     67   typedef ptrdiff_t            difference_type;
     68   typedef forward_iterator_tag iterator_category;
     69 
     70   _Slist_node_base *_M_node;
     71 
     72   _Slist_iterator_base(_Slist_node_base *__x) : _M_node(__x) {}
     73 
     74   void _M_incr() {
     75     _M_node = _M_node->_M_next;
     76   }
     77 };
     78 
     79 template <class _Tp, class _Traits>
     80 class _Slist_iterator : public _Slist_iterator_base {
     81 public:
     82   typedef typename _Traits::value_type value_type;
     83   typedef typename _Traits::pointer    pointer;
     84   typedef typename _Traits::reference  reference;
     85   typedef forward_iterator_tag iterator_category;
     86   typedef size_t size_type;
     87   typedef ptrdiff_t difference_type;
     88 
     89   typedef _Slist_iterator<_Tp, _Traits>         _Self;
     90   typedef typename _Traits::_NonConstTraits     _NonConstTraits;
     91   typedef _Slist_iterator<_Tp, _NonConstTraits> iterator;
     92   typedef typename _Traits::_ConstTraits        _ConstTraits;
     93   typedef _Slist_iterator<_Tp, _ConstTraits>    const_iterator;
     94 
     95   typedef _Slist_node<value_type> _Node;
     96 
     97   explicit _Slist_iterator(_Slist_node_base *__x) : _Slist_iterator_base(__x) {}
     98   _Slist_iterator() : _Slist_iterator_base(0) {}
     99   //copy constructor for iterator and constructor from iterator for const_iterator
    100   _Slist_iterator(const iterator& __x) : _Slist_iterator_base(__x._M_node) {}
    101 
    102   reference operator*() const { return __STATIC_CAST(_Node*, this->_M_node)->_M_data; }
    103 
    104   _STLP_DEFINE_ARROW_OPERATOR
    105 
    106   _Self& operator++() {
    107     _M_incr();
    108     return *this;
    109   }
    110   _Self operator++(int) {
    111     _Self __tmp = *this;
    112     _M_incr();
    113     return __tmp;
    114   }
    115 
    116   bool operator==(const_iterator __y ) const {
    117     return this->_M_node == __y._M_node;
    118   }
    119   bool operator!=(const_iterator __y ) const {
    120     return this->_M_node != __y._M_node;
    121   }
    122 };
    123 
    124 #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
    125 _STLP_MOVE_TO_STD_NAMESPACE
    126 template <class _Tp, class _Traits>
    127 struct __type_traits<_STLP_PRIV _Slist_iterator<_Tp, _Traits> > {
    128   typedef __false_type   has_trivial_default_constructor;
    129   typedef __true_type    has_trivial_copy_constructor;
    130   typedef __true_type    has_trivial_assignment_operator;
    131   typedef __true_type    has_trivial_destructor;
    132   typedef __false_type   is_POD_type;
    133 };
    134 _STLP_MOVE_TO_PRIV_NAMESPACE
    135 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
    136 
    137 #if defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
    138 _STLP_MOVE_TO_STD_NAMESPACE
    139 template <class _Tp, class _Traits>
    140 inline _Tp* _STLP_CALL value_type(const _STLP_PRIV _Slist_iterator<_Tp, _Traits>&) { return __STATIC_CAST(_Tp*, 0); }
    141 inline ptrdiff_t* _STLP_CALL distance_type(const _STLP_PRIV _Slist_iterator_base&) { return 0; }
    142 inline forward_iterator_tag _STLP_CALL iterator_category(const _STLP_PRIV _Slist_iterator_base&) { return forward_iterator_tag(); }
    143 _STLP_MOVE_TO_PRIV_NAMESPACE
    144 #endif /* OLD_QUERIES */
    145 
    146 // Base class that encapsulates details of allocators and simplifies EH
    147 template <class _Tp, class _Alloc>
    148 class _Slist_base {
    149 protected:
    150   typedef _Slist_node<_Tp> _Node;
    151   typedef typename _Alloc_traits<_Node,_Alloc>::allocator_type _M_node_allocator_type;
    152   typedef _Slist_base<_Tp, _Alloc> _Self;
    153 
    154 public:
    155   typedef _STLP_alloc_proxy<_Slist_node_base, _Node, _M_node_allocator_type> _AllocProxy;
    156 
    157   _STLP_FORCE_ALLOCATORS(_Tp, _Alloc)
    158   typedef _Alloc allocator_type;
    159 
    160   _Slist_base(const allocator_type& __a) :
    161     _M_head(_STLP_CONVERT_ALLOCATOR(__a, _Node), _Slist_node_base() )
    162   { _M_head._M_data._M_next = 0; }
    163 
    164 #if !defined (_STLP_NO_MOVE_SEMANTIC)
    165   _Slist_base(__move_source<_Self> src) :
    166     _M_head(__move_source<_AllocProxy>(src.get()._M_head))
    167   { src.get()._M_head._M_data._M_next = 0; }
    168 #endif
    169 
    170   ~_Slist_base() { _M_erase_after(&_M_head._M_data, 0); }
    171 
    172 protected:
    173   _Slist_node_base* _M_erase_after(_Slist_node_base* __pos) {
    174     _Node* __next = __STATIC_CAST(_Node*, __pos->_M_next);
    175     _Slist_node_base* __next_next = __next->_M_next;
    176     __pos->_M_next = __next_next;
    177     _STLP_STD::_Destroy(&__next->_M_data);
    178     _M_head.deallocate(__next,1);
    179     return __next_next;
    180   }
    181   _Slist_node_base* _M_erase_after(_Slist_node_base*, _Slist_node_base*);
    182 
    183 public:
    184   allocator_type get_allocator() const
    185   { return _STLP_CONVERT_ALLOCATOR((const _M_node_allocator_type&)_M_head, _Tp); }
    186   _AllocProxy _M_head;
    187 };
    188 
    189 #if defined (_STLP_USE_PTR_SPECIALIZATIONS)
    190 #  define slist _STLP_PTR_IMPL_NAME(slist)
    191 #elif defined (_STLP_DEBUG)
    192 #  define slist _STLP_NON_DBG_NAME(slist)
    193 #else
    194 _STLP_MOVE_TO_STD_NAMESPACE
    195 #endif
    196 
    197 template <class _Tp, _STLP_DFL_TMPL_PARAM(_Alloc, allocator<_Tp>) >
    198 class slist;
    199 
    200 #if !defined (slist)
    201 _STLP_MOVE_TO_PRIV_NAMESPACE
    202 #endif
    203 
    204 // helper functions to reduce code duplication
    205 template <class _Tp, class _Alloc, class _BinaryPredicate>
    206 void _Slist_unique(slist<_Tp, _Alloc>& __that, _BinaryPredicate __binary_pred);
    207 
    208 template <class _Tp, class _Alloc, class _StrictWeakOrdering>
    209 void _Slist_merge(slist<_Tp, _Alloc>& __that, slist<_Tp, _Alloc>& __x,
    210                   _StrictWeakOrdering __comp);
    211 
    212 template <class _Tp, class _Alloc, class _StrictWeakOrdering>
    213 void _Slist_sort(slist<_Tp, _Alloc>& __that, _StrictWeakOrdering __comp);
    214 
    215 #if !defined (slist)
    216 _STLP_MOVE_TO_STD_NAMESPACE
    217 #endif
    218 
    219 template <class _Tp, class _Alloc>
    220 class slist : protected _STLP_PRIV _Slist_base<_Tp,_Alloc>
    221 #if defined (_STLP_USE_PARTIAL_SPEC_WORKAROUND) && !defined (slist)
    222             , public __stlport_class<slist<_Tp, _Alloc> >
    223 #endif
    224 {
    225 private:
    226   typedef _STLP_PRIV _Slist_base<_Tp,_Alloc> _Base;
    227   typedef slist<_Tp,_Alloc> _Self;
    228 public:
    229   typedef _Tp                value_type;
    230 
    231   typedef value_type*       pointer;
    232   typedef const value_type* const_pointer;
    233   typedef value_type&       reference;
    234   typedef const value_type& const_reference;
    235   typedef size_t            size_type;
    236   typedef ptrdiff_t         difference_type;
    237   typedef forward_iterator_tag _Iterator_category;
    238 
    239   typedef _STLP_PRIV _Slist_iterator<_Tp, _Nonconst_traits<_Tp> > iterator;
    240   typedef _STLP_PRIV _Slist_iterator<_Tp, _Const_traits<_Tp> >    const_iterator;
    241 
    242   _STLP_FORCE_ALLOCATORS(_Tp, _Alloc)
    243   typedef typename _Base::allocator_type allocator_type;
    244 
    245 private:
    246   typedef _STLP_PRIV _Slist_node<_Tp> _Node;
    247   typedef _STLP_PRIV _Slist_node_base _Node_base;
    248 
    249 #if !defined(_STLP_DONT_SUP_DFLT_PARAM)
    250   _Node* _M_create_node(const value_type& __x = _Tp()) {
    251 #else
    252   _Node* _M_create_node(const value_type& __x) {
    253 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    254     _Node* __node = this->_M_head.allocate(1);
    255     _STLP_TRY {
    256       _Copy_Construct(&__node->_M_data, __x);
    257       __node->_M_next = 0;
    258     }
    259     _STLP_UNWIND(this->_M_head.deallocate(__node, 1))
    260     return __node;
    261   }
    262 
    263 #if defined(_STLP_DONT_SUP_DFLT_PARAM)
    264   _Node* _M_create_node() {
    265     _Node* __node = this->_M_head.allocate(1);
    266     _STLP_TRY {
    267       _STLP_STD::_Construct(&__node->_M_data);
    268       __node->_M_next = 0;
    269     }
    270     _STLP_UNWIND(this->_M_head.deallocate(__node, 1))
    271     return __node;
    272   }
    273 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    274 
    275 public:
    276 
    277   allocator_type get_allocator() const { return _Base::get_allocator(); }
    278 
    279 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    280   explicit slist(const allocator_type& __a = allocator_type())
    281 #else
    282   slist()
    283     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(allocator_type()) {}
    284   slist(const allocator_type& __a)
    285 #endif
    286     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__a) {}
    287 
    288 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    289   explicit slist(size_type __n, const value_type& __x = _STLP_DEFAULT_CONSTRUCTED(_Tp),
    290                  const allocator_type& __a =  allocator_type())
    291 #else
    292   explicit slist(size_type __n)
    293     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(allocator_type())
    294     { _M_insert_after_fill(&this->_M_head._M_data, __n, _STLP_DEFAULT_CONSTRUCTED(_Tp)); }
    295   slist(size_type __n, const value_type& __x)
    296     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(allocator_type())
    297     { _M_insert_after_fill(&this->_M_head._M_data, __n, __x); }
    298   slist(size_type __n, const value_type& __x, const allocator_type& __a)
    299 #endif
    300     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__a)
    301     { _M_insert_after_fill(&this->_M_head._M_data, __n, __x); }
    302 
    303 #if defined (_STLP_MEMBER_TEMPLATES)
    304   // We don't need any dispatching tricks here, because _M_insert_after_range
    305   // already does them.
    306   template <class _InputIterator>
    307   slist(_InputIterator __first, _InputIterator __last,
    308         const allocator_type& __a _STLP_ALLOCATOR_TYPE_DFL)
    309     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__a)
    310     { _M_insert_after_range(&this->_M_head._M_data, __first, __last); }
    311 #  if defined (_STLP_NEEDS_EXTRA_TEMPLATE_CONSTRUCTORS)
    312   // VC++ needs this crazyness
    313   template <class _InputIterator>
    314   slist(_InputIterator __first, _InputIterator __last)
    315     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(allocator_type())
    316     { _M_insert_after_range(&this->_M_head._M_data, __first, __last); }
    317 # endif
    318 #else /* _STLP_MEMBER_TEMPLATES */
    319   slist(const_iterator __first, const_iterator __last,
    320         const allocator_type& __a =  allocator_type() )
    321     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__a)
    322     { _M_insert_after_range(&this->_M_head._M_data, __first, __last); }
    323   slist(const value_type* __first, const value_type* __last,
    324         const allocator_type& __a =  allocator_type())
    325     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__a)
    326     { _M_insert_after_range(&this->_M_head._M_data, __first, __last); }
    327 #endif /* _STLP_MEMBER_TEMPLATES */
    328 
    329   slist(const _Self& __x)
    330     : _STLP_PRIV _Slist_base<_Tp,_Alloc>(__x.get_allocator())
    331     { _M_insert_after_range(&this->_M_head._M_data, __x.begin(), __x.end()); }
    332 
    333 #if !defined (_STLP_NO_MOVE_SEMANTIC)
    334   slist(__move_source<_Self> src)
    335     : _STLP_PRIV _Slist_base<_Tp, _Alloc>(__move_source<_Base>(src.get())) {}
    336 #endif
    337 
    338   _Self& operator= (const _Self& __x);
    339 
    340   ~slist() {}
    341 
    342 public:
    343   // assign(), a generalized assignment member function.  Two
    344   // versions: one that takes a count, and one that takes a range.
    345   // The range version is a member template, so we dispatch on whether
    346   // or not the type is an integer.
    347 
    348   void assign(size_type __n, const _Tp& __val) { _M_fill_assign(__n, __val); }
    349 
    350 private:
    351   void _M_fill_assign(size_type __n, const _Tp& __val);
    352 
    353 #if defined (_STLP_MEMBER_TEMPLATES)
    354 public:
    355   template <class _InputIterator>
    356   void assign(_InputIterator __first, _InputIterator __last) {
    357     typedef typename _IsIntegral<_InputIterator>::_Ret _Integral;
    358     _M_assign_dispatch(__first, __last, _Integral());
    359   }
    360 
    361 private:
    362   template <class _Integer>
    363   void _M_assign_dispatch(_Integer __n, _Integer __val,
    364                           const __true_type& /*_IsIntegral*/) {
    365     _M_fill_assign((size_type) __n, (_Tp) __val);
    366   }
    367 
    368   template <class _InputIter>
    369   void _M_assign_dispatch(_InputIter __first, _InputIter __last,
    370                           const __false_type& /*_IsIntegral*/) {
    371 #else
    372 public:
    373   void assign(const_pointer __first, const_pointer __last) {
    374     _Node_base* __prev = &this->_M_head._M_data;
    375     _Node_base* __node = this->_M_head._M_data._M_next;
    376     while (__node != 0 && __first != __last) {
    377       __STATIC_CAST(_Node*, __node)->_M_data = *__first;
    378       __prev = __node;
    379       __node = __node->_M_next;
    380       ++__first;
    381     }
    382     if (__first != __last)
    383       _M_insert_after_range(__prev, __first, __last);
    384     else
    385       this->_M_erase_after(__prev, 0);
    386   }
    387   void assign(const_iterator __first, const_iterator __last) {
    388 #endif /* _STLP_MEMBER_TEMPLATES */
    389     _Node_base* __prev = &this->_M_head._M_data;
    390     _Node_base* __node = this->_M_head._M_data._M_next;
    391     while (__node != 0 && __first != __last) {
    392       __STATIC_CAST(_Node*, __node)->_M_data = *__first;
    393       __prev = __node;
    394       __node = __node->_M_next;
    395       ++__first;
    396     }
    397     if (__first != __last)
    398       _M_insert_after_range(__prev, __first, __last);
    399     else
    400       this->_M_erase_after(__prev, 0);
    401   }
    402 
    403 public:
    404 
    405   // Experimental new feature: before_begin() returns a
    406   // non-dereferenceable iterator that, when incremented, yields
    407   // begin().  This iterator may be used as the argument to
    408   // insert_after, erase_after, etc.  Note that even for an empty
    409   // slist, before_begin() is not the same iterator as end().  It
    410   // is always necessary to increment before_begin() at least once to
    411   // obtain end().
    412   iterator before_begin() { return iterator(&this->_M_head._M_data); }
    413   const_iterator before_begin() const
    414     { return const_iterator(__CONST_CAST(_Node_base*, &this->_M_head._M_data)); }
    415 
    416   iterator begin() { return iterator(this->_M_head._M_data._M_next); }
    417   const_iterator begin() const
    418     { return const_iterator(this->_M_head._M_data._M_next);}
    419 
    420   iterator end() { return iterator(); }
    421   const_iterator end() const { return const_iterator(); }
    422 
    423   size_type size() const
    424   { return _STLP_PRIV _Sl_global_inst::size(this->_M_head._M_data._M_next); }
    425 
    426   size_type max_size() const { return size_type(-1); }
    427 
    428   bool empty() const { return this->_M_head._M_data._M_next == 0; }
    429 
    430   void swap(_Self& __x)
    431   { this->_M_head.swap(__x._M_head); }
    432 #if defined (_STLP_USE_PARTIAL_SPEC_WORKAROUND) && !defined (_STLP_FUNCTION_TMPL_PARTIAL_ORDER)
    433   void _M_swap_workaround(_Self& __x) { swap(__x); }
    434 #endif
    435 
    436 public:
    437   reference front()             { return *begin(); }
    438   const_reference front() const { return *begin(); }
    439 #if !defined (_STLP_DONT_SUP_DFLT_PARAM) && !defined (_STLP_NO_ANACHRONISMS)
    440   void push_front(const value_type& __x = _Tp())   {
    441 #else
    442   void push_front(const value_type& __x)   {
    443 #endif /*!_STLP_DONT_SUP_DFLT_PARAM && !_STLP_NO_ANACHRONISMS*/
    444     _STLP_PRIV __slist_make_link(&this->_M_head._M_data, _M_create_node(__x));
    445   }
    446 
    447 #if defined (_STLP_DONT_SUP_DFLT_PARAM) && !defined (_STLP_NO_ANACHRONISMS)
    448   void push_front() { _STLP_PRIV __slist_make_link(&this->_M_head._M_data, _M_create_node());}
    449 #endif /*_STLP_DONT_SUP_DFLT_PARAM && !_STLP_NO_ANACHRONISMS*/
    450 
    451   void pop_front() {
    452     _Node* __node = __STATIC_CAST(_Node*, this->_M_head._M_data._M_next);
    453     this->_M_head._M_data._M_next = __node->_M_next;
    454     _STLP_STD::_Destroy(&__node->_M_data);
    455     this->_M_head.deallocate(__node, 1);
    456   }
    457 
    458   iterator previous(const_iterator __pos) {
    459     return iterator(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node));
    460   }
    461   const_iterator previous(const_iterator __pos) const {
    462     return const_iterator(__CONST_CAST(_Node_base*,
    463                                        _STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data,
    464                                                                                __pos._M_node)));
    465   }
    466 
    467 private:
    468 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    469   _Node* _M_insert_after(_Node_base* __pos, const value_type& __x = _Tp()) {
    470 #else
    471   _Node* _M_insert_after(_Node_base* __pos, const value_type& __x) {
    472 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    473     return __STATIC_CAST(_Node*, _STLP_PRIV __slist_make_link(__pos, _M_create_node(__x)));
    474   }
    475 
    476 #if defined (_STLP_DONT_SUP_DFLT_PARAM)
    477   _Node* _M_insert_after(_Node_base* __pos) {
    478     return __STATIC_CAST(_Node*, _STLP_PRIV __slist_make_link(__pos, _M_create_node()));
    479   }
    480 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    481 
    482   void _M_insert_after_fill(_Node_base* __pos,
    483                             size_type __n, const value_type& __x) {
    484     for (size_type __i = 0; __i < __n; ++__i)
    485       __pos = _STLP_PRIV __slist_make_link(__pos, _M_create_node(__x));
    486   }
    487 
    488 #if defined (_STLP_MEMBER_TEMPLATES)
    489   // Check whether it's an integral type.  If so, it's not an iterator.
    490   template <class _InIter>
    491   void _M_insert_after_range(_Node_base* __pos,
    492                              _InIter __first, _InIter __last) {
    493     typedef typename _IsIntegral<_InIter>::_Ret _Integral;
    494     _M_insert_after_range(__pos, __first, __last, _Integral());
    495   }
    496 
    497   template <class _Integer>
    498   void _M_insert_after_range(_Node_base* __pos, _Integer __n, _Integer __x,
    499                              const __true_type&) {
    500     _M_insert_after_fill(__pos, __n, __x);
    501   }
    502 
    503   template <class _InIter>
    504   void _M_insert_after_range(_Node_base* __pos,
    505                              _InIter __first, _InIter __last,
    506                              const __false_type&) {
    507 #else /* _STLP_MEMBER_TEMPLATES */
    508   void _M_insert_after_range(_Node_base* __pos,
    509                              const value_type* __first,
    510                              const value_type* __last) {
    511     while (__first != __last) {
    512       __pos = _STLP_PRIV __slist_make_link(__pos, _M_create_node(*__first));
    513       ++__first;
    514     }
    515   }
    516   void _M_insert_after_range(_Node_base* __pos,
    517                              const_iterator __first, const_iterator __last) {
    518 #endif /* _STLP_MEMBER_TEMPLATES */
    519     while (__first != __last) {
    520       __pos = _STLP_PRIV __slist_make_link(__pos, _M_create_node(*__first));
    521       ++__first;
    522     }
    523   }
    524 
    525 #if defined (_STLP_MEMBER_TEMPLATES)
    526   // Check whether it's an integral type.  If so, it's not an iterator.
    527   template <class _InIter>
    528   void _M_splice_after_range(_Node_base* __pos,
    529                              _InIter __first, _InIter __last) {
    530     typedef typename _IsIntegral<_InIter>::_Ret _Integral;
    531     _M_splice_after_range(__pos, __first, __last, _Integral());
    532   }
    533 
    534   template <class _Integer>
    535   void _M_splice_after_range(_Node_base* __pos, _Integer __n, _Integer __x,
    536                              const __true_type&) {
    537     _M_insert_after_fill(__pos, __n, __x);
    538   }
    539 
    540   template <class _InIter>
    541   void _M_splice_after_range(_Node_base* __pos,
    542                              _InIter __first, _InIter __last,
    543                              const __false_type&) {
    544 #else /* _STLP_MEMBER_TEMPLATES */
    545   void _M_splice_after_range(_Node_base* __pos,
    546                              const value_type* __first,
    547                              const value_type* __last) {
    548     while (__first != __last) {
    549       __pos = _STLP_PRIV __slist_make_link(__pos, _M_create_node(*__first));
    550       ++__first;
    551     }
    552   }
    553   void _M_splice_after_range(_Node_base* __pos,
    554                              const_iterator __first, const_iterator __last) {
    555 #endif /* _STLP_MEMBER_TEMPLATES */
    556     //We use a temporary slist to avoid the auto reference troubles (infinite loop)
    557     _Self __tmp(__first, __last, this->get_allocator());
    558     splice_after(iterator(__pos), __tmp);
    559   }
    560 
    561 #if defined (_STLP_MEMBER_TEMPLATES)
    562   // Check whether it's an integral type.  If so, it's not an iterator.
    563   template <class _InIter>
    564   void _M_splice_range(_Node_base* __pos,
    565                        _InIter __first, _InIter __last) {
    566     typedef typename _IsIntegral<_InIter>::_Ret _Integral;
    567     _M_splice_range(__pos, __first, __last, _Integral());
    568   }
    569 
    570   template <class _Integer>
    571   void _M_splice_range(_Node_base* __pos, _Integer __n, _Integer __x,
    572                        const __true_type&) {
    573     _M_insert_after_fill(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos),
    574                          __n, __x);
    575   }
    576 
    577   template <class _InIter>
    578   void _M_splice_range(_Node_base* __pos,
    579                        _InIter __first, _InIter __last,
    580                        const __false_type&) {
    581 #else /* _STLP_MEMBER_TEMPLATES */
    582   void _M_splice_range(_Node_base* __pos,
    583                        const value_type* __first,
    584                        const value_type* __last) {
    585     while (__first != __last) {
    586       __pos = _STLP_PRIV __slist_make_link(__pos, _M_create_node(*__first));
    587       ++__first;
    588     }
    589   }
    590   void _M_splice_range(_Node_base* __pos,
    591                        const_iterator __first, const_iterator __last) {
    592 #endif /* _STLP_MEMBER_TEMPLATES */
    593     //We use a temporary slist to avoid the auto reference troubles (infinite loop)
    594     _Self __tmp(__first, __last, this->get_allocator());
    595     splice(iterator(__pos), __tmp);
    596   }
    597 
    598 public:
    599 
    600 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    601   iterator insert_after(iterator __pos, const value_type& __x = _Tp()) {
    602 #else
    603   iterator insert_after(iterator __pos, const value_type& __x) {
    604 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    605     return iterator(_M_insert_after(__pos._M_node, __x));
    606   }
    607 
    608 #if defined (_STLP_DONT_SUP_DFLT_PARAM)
    609   iterator insert_after(iterator __pos) {
    610     return insert_after(__pos, _STLP_DEFAULT_CONSTRUCTED(_Tp));
    611   }
    612 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    613 
    614   void insert_after(iterator __pos, size_type __n, const value_type& __x) {
    615     _M_insert_after_fill(__pos._M_node, __n, __x);
    616   }
    617 
    618 #if defined (_STLP_MEMBER_TEMPLATES)
    619   // We don't need any dispatching tricks here, because _M_insert_after_range
    620   // already does them.
    621   template <class _InIter>
    622   void insert_after(iterator __pos, _InIter __first, _InIter __last) {
    623 #else /* _STLP_MEMBER_TEMPLATES */
    624   void insert_after(iterator __pos,
    625                     const value_type* __first, const value_type* __last) {
    626     _M_insert_after_range(__pos._M_node, __first, __last);
    627   }
    628   void insert_after(iterator __pos,
    629                     const_iterator __first, const_iterator __last) {
    630 #endif /* _STLP_MEMBER_TEMPLATES */
    631     _M_splice_after_range(__pos._M_node, __first, __last);
    632   }
    633 
    634 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    635   iterator insert(iterator __pos, const value_type& __x = _Tp()) {
    636 #else
    637   iterator insert(iterator __pos, const value_type& __x) {
    638 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    639     return iterator(_M_insert_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    640                     __x));
    641   }
    642 
    643 #if defined (_STLP_DONT_SUP_DFLT_PARAM)
    644   iterator insert(iterator __pos) {
    645     return iterator(_M_insert_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    646                                     _STLP_DEFAULT_CONSTRUCTED(_Tp)));
    647   }
    648 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    649 
    650   void insert(iterator __pos, size_type __n, const value_type& __x) {
    651     _M_insert_after_fill(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node), __n, __x);
    652   }
    653 
    654 #if defined (_STLP_MEMBER_TEMPLATES)
    655   // We don't need any dispatching tricks here, because _M_insert_after_range
    656   // already does them.
    657   template <class _InIter>
    658   void insert(iterator __pos, _InIter __first, _InIter __last) {
    659 #else /* _STLP_MEMBER_TEMPLATES */
    660   void insert(iterator __pos, const value_type* __first,
    661                               const value_type* __last) {
    662     _M_insert_after_range(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    663                           __first, __last);
    664   }
    665   void insert(iterator __pos, const_iterator __first, const_iterator __last) {
    666 #endif /* _STLP_MEMBER_TEMPLATES */
    667     _M_splice_range(__pos._M_node, __first, __last);
    668   }
    669 
    670 public:
    671   iterator erase_after(iterator __pos)
    672   { return iterator(this->_M_erase_after(__pos._M_node)); }
    673   iterator erase_after(iterator __before_first, iterator __last)
    674   { return iterator(this->_M_erase_after(__before_first._M_node, __last._M_node)); }
    675 
    676   iterator erase(iterator __pos)
    677   { return iterator(this->_M_erase_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node))); }
    678   iterator erase(iterator __first, iterator __last)
    679   { return iterator(this->_M_erase_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __first._M_node), __last._M_node)); }
    680 
    681 #if !defined (_STLP_DONT_SUP_DFLT_PARAM)
    682   void resize(size_type new_size, const value_type& __x = _Tp());
    683 #else
    684   void resize(size_type new_size, const value_type& __x);
    685 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    686 
    687 #if defined (_STLP_DONT_SUP_DFLT_PARAM)
    688   void resize(size_type new_size) { resize(new_size, _STLP_DEFAULT_CONSTRUCTED(_Tp)); }
    689 #endif /*_STLP_DONT_SUP_DFLT_PARAM*/
    690 
    691   void clear()
    692   { this->_M_erase_after(&this->_M_head._M_data, 0); }
    693 
    694 public:
    695   // Moves the range [__before_first + 1, __before_last + 1) to *this,
    696   //  inserting it immediately after __pos.  This is constant time.
    697   void splice_after(iterator __pos, _Self& __x,
    698                     iterator __before_first, iterator __before_last) {
    699     if (__before_first != __before_last) {
    700       if (this->get_allocator() == __x.get_allocator()) {
    701         _STLP_PRIV _Sl_global_inst::__splice_after(__pos._M_node,
    702                                                    __before_first._M_node, __before_last._M_node);
    703       }
    704       else {
    705         this->insert_after(__pos, iterator(__before_first._M_node->_M_next), iterator(__before_last._M_node->_M_next));
    706         __x.erase_after(__before_first, ++__before_last);
    707       }
    708     }
    709   }
    710 
    711   // Moves the element that follows __prev to *this, inserting it immediately
    712   //  after __pos.  This is constant time.
    713   void splice_after(iterator __pos, _Self& __x, iterator __prev) {
    714     if (this->get_allocator() == __x.get_allocator()) {
    715       _STLP_PRIV _Sl_global_inst::__splice_after(__pos._M_node,
    716                                                  __prev._M_node, __prev._M_node->_M_next);
    717     }
    718     else {
    719       this->insert_after(__pos, __STATIC_CAST(_Node*, __prev._M_node->_M_next)->_M_data);
    720       __x.erase_after(__prev);
    721     }
    722   }
    723 
    724   // Removes all of the elements from the list __x to *this, inserting
    725   // them immediately after __pos.  __x must not be *this.  Complexity:
    726   // linear in __x.size().
    727   void splice_after(iterator __pos, _Self& __x) {
    728     if (this->get_allocator() == __x.get_allocator())
    729       _STLP_PRIV _Sl_global_inst::__splice_after(__pos._M_node, &__x._M_head._M_data);
    730     else {
    731       this->insert_after(__pos, __x.begin(), __x.end());
    732       __x.clear();
    733     }
    734   }
    735 
    736   // Linear in distance(begin(), __pos), and linear in __x.size().
    737   void splice(iterator __pos, _Self& __x) {
    738     if (__x._M_head._M_data._M_next) {
    739       if (this->get_allocator() == __x.get_allocator()) {
    740         _STLP_PRIV _Sl_global_inst::__splice_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    741                                                    &__x._M_head._M_data,
    742                                                    _STLP_PRIV _Sl_global_inst::__previous(&__x._M_head._M_data, 0));
    743       }
    744       else {
    745         insert(__pos, __x.begin(), __x.end());
    746         __x.clear();
    747       }
    748     }
    749   }
    750 
    751   // Linear in distance(begin(), __pos), and in distance(__x.begin(), __i).
    752   void splice(iterator __pos, _Self& __x, iterator __i) {
    753     if (this->get_allocator() == __x.get_allocator()) {
    754       _STLP_PRIV _Sl_global_inst::__splice_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    755                                                  _STLP_PRIV _Sl_global_inst::__previous(&__x._M_head._M_data, __i._M_node),
    756                                                  __i._M_node);
    757     }
    758     else {
    759       insert(__pos, *__i);
    760       __x.erase(__i);
    761     }
    762   }
    763 
    764   // Linear in distance(begin(), __pos), in distance(__x.begin(), __first),
    765   // and in distance(__first, __last).
    766   void splice(iterator __pos, _Self& __x, iterator __first, iterator __last) {
    767     if (__first != __last) {
    768       if (this->get_allocator() == __x.get_allocator()) {
    769         _STLP_PRIV _Sl_global_inst::__splice_after(_STLP_PRIV _Sl_global_inst::__previous(&this->_M_head._M_data, __pos._M_node),
    770                                                    _STLP_PRIV _Sl_global_inst::__previous(&__x._M_head._M_data, __first._M_node),
    771                                                    _STLP_PRIV _Sl_global_inst::__previous(__first._M_node, __last._M_node));
    772       }
    773       else {
    774         insert(__pos, __first, __last);
    775         __x.erase(__first, __last);
    776       }
    777     }
    778   }
    779 
    780 public:
    781   void reverse() {
    782     if (this->_M_head._M_data._M_next)
    783       this->_M_head._M_data._M_next = _STLP_PRIV _Sl_global_inst::__reverse(this->_M_head._M_data._M_next);
    784   }
    785 
    786   void remove(const _Tp& __val);
    787 
    788   void unique() { _STLP_PRIV _Slist_unique(*this, equal_to<value_type>()); }
    789   void merge(_Self& __x) { _STLP_PRIV _Slist_merge(*this, __x, less<value_type>()); }
    790   void sort() { _STLP_PRIV _Slist_sort(*this, less<value_type>()); }
    791 
    792 #if defined (_STLP_MEMBER_TEMPLATES)
    793   template <class _Predicate>
    794   void remove_if(_Predicate __pred) {
    795     _Node_base* __cur = &this->_M_head._M_data;
    796     while (__cur->_M_next) {
    797       if (__pred(__STATIC_CAST(_Node*, __cur->_M_next)->_M_data))
    798         this->_M_erase_after(__cur);
    799       else
    800         __cur = __cur->_M_next;
    801     }
    802   }
    803 
    804   template <class _BinaryPredicate>
    805   void unique(_BinaryPredicate __pred)
    806   { _STLP_PRIV _Slist_unique(*this, __pred); }
    807 
    808   template <class _StrictWeakOrdering>
    809   void merge(_Self& __x, _StrictWeakOrdering __comp)
    810   { _STLP_PRIV _Slist_merge(*this, __x, __comp); }
    811 
    812   template <class _StrictWeakOrdering>
    813   void sort(_StrictWeakOrdering __comp)
    814   { _STLP_PRIV _Slist_sort(*this, __comp); }
    815 #endif /* _STLP_MEMBER_TEMPLATES */
    816 };
    817 
    818 #if defined (slist)
    819 #  undef slist
    820 _STLP_MOVE_TO_STD_NAMESPACE
    821 #endif
    822 
    823 _STLP_END_NAMESPACE
    824 
    825 #if !defined (_STLP_LINK_TIME_INSTANTIATION)
    826 #  include <stl/_slist.c>
    827 #endif
    828 
    829 #if defined (_STLP_USE_PTR_SPECIALIZATIONS)
    830 #  include <stl/pointers/_slist.h>
    831 #endif
    832 
    833 #if defined (_STLP_DEBUG)
    834 #  include <stl/debug/_slist.h>
    835 #endif
    836 
    837 _STLP_BEGIN_NAMESPACE
    838 
    839 template <class _Tp, class _Alloc>
    840 inline bool  _STLP_CALL
    841 operator == (const slist<_Tp,_Alloc>& _SL1, const slist<_Tp,_Alloc>& _SL2) {
    842   typedef typename slist<_Tp,_Alloc>::const_iterator const_iterator;
    843   const_iterator __end1 = _SL1.end();
    844   const_iterator __end2 = _SL2.end();
    845 
    846   const_iterator __i1 = _SL1.begin();
    847   const_iterator __i2 = _SL2.begin();
    848   while (__i1 != __end1 && __i2 != __end2 && *__i1 == *__i2) {
    849     ++__i1;
    850     ++__i2;
    851   }
    852   return __i1 == __end1 && __i2 == __end2;
    853 }
    854 
    855 #define _STLP_EQUAL_OPERATOR_SPECIALIZED
    856 #define _STLP_TEMPLATE_HEADER    template <class _Tp, class _Alloc>
    857 #define _STLP_TEMPLATE_CONTAINER slist<_Tp, _Alloc>
    858 #include <stl/_relops_cont.h>
    859 #undef _STLP_TEMPLATE_CONTAINER
    860 #undef _STLP_TEMPLATE_HEADER
    861 #undef _STLP_EQUAL_OPERATOR_SPECIALIZED
    862 
    863 #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
    864 #  if !defined (_STLP_NO_MOVE_SEMANTIC)
    865 template <class _Tp, class _Alloc>
    866 struct __move_traits<slist<_Tp, _Alloc> > {
    867   typedef __true_type implemented;
    868   typedef typename __move_traits<_Alloc>::complete complete;
    869 };
    870 #  endif
    871 
    872 // Specialization of insert_iterator so that insertions will be constant
    873 // time rather than linear time.
    874 template <class _Tp, class _Alloc>
    875 class insert_iterator<slist<_Tp, _Alloc> > {
    876 protected:
    877   typedef slist<_Tp, _Alloc> _Container;
    878   _Container* _M_container;
    879   typename _Container::iterator _M_iter;
    880 public:
    881   typedef _Container          container_type;
    882   typedef output_iterator_tag iterator_category;
    883   typedef void                value_type;
    884   typedef void                difference_type;
    885   typedef void                pointer;
    886   typedef void                reference;
    887 
    888   insert_iterator(_Container& __x, typename _Container::iterator __i)
    889     : _M_container(&__x) {
    890     if (__i == __x.begin())
    891       _M_iter = __x.before_begin();
    892     else
    893       _M_iter = __x.previous(__i);
    894   }
    895 
    896   insert_iterator<_Container>&
    897   operator = (const typename _Container::value_type& __val) {
    898     _M_iter = _M_container->insert_after(_M_iter, __val);
    899     return *this;
    900   }
    901 
    902   insert_iterator<_Container>& operator*() { return *this; }
    903   insert_iterator<_Container>& operator++() { return *this; }
    904   insert_iterator<_Container>& operator++(int) { return *this; }
    905 };
    906 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
    907 
    908 _STLP_END_NAMESPACE
    909 
    910 #endif /* _STLP_INTERNAL_SLIST_H */
    911 
    912 // Local Variables:
    913 // mode:C++
    914 // End:
    915