libstdc++-v3/include/bits/stl_set.h

   1 // Set implementation -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 /*
  31  *
  32  * Copyright (c) 1994
  33  * Hewlett-Packard Company
  34  *
  35  * Permission to use, copy, modify, distribute and sell this software
  36  * and its documentation for any purpose is hereby granted without fee,
  37  * provided that the above copyright notice appear in all copies and
  38  * that both that copyright notice and this permission notice appear
  39  * in supporting documentation.  Hewlett-Packard Company makes no
  40  * representations about the suitability of this software for any
  41  * purpose.  It is provided "as is" without express or implied warranty.
  42  *
  43  *
  44  * Copyright (c) 1996,1997
  45  * Silicon Graphics Computer Systems, Inc.
  46  *
  47  * Permission to use, copy, modify, distribute and sell this software
  48  * and its documentation for any purpose is hereby granted without fee,
  49  * provided that the above copyright notice appear in all copies and
  50  * that both that copyright notice and this permission notice appear
  51  * in supporting documentation.  Silicon Graphics makes no
  52  * representations about the suitability of this software for any
  53  * purpose.  It is provided "as is" without express or implied warranty.
  54  */
  55
  56 /** @file stl_set.h
  57  *  This is an internal header file, included by other library headers.
  58  *  You should not attempt to use it directly.
  59  */
  60
  61 #ifndef _SET_H
  62 #define _SET_H 1
  63
  64 #include <bits/concept_check.h>
  65
  66 namespace __gnu_norm
  67 {
  68   // Forward declarations of operators < and ==, needed for friend declaration.
  69   template<class _Key, class _Compare = less<_Key>,
  70            class _Alloc = allocator<_Key> >
  71   class set;
  72
  73   template<class _Key, class _Compare, class _Alloc>
  74     inline bool
  75     operator==(const set<_Key,_Compare,_Alloc>& __x,
  76                const set<_Key,_Compare,_Alloc>& __y);
  77
  78   template<class _Key, class _Compare, class _Alloc>
  79     inline bool
  80     operator<(const set<_Key,_Compare,_Alloc>& __x,
  81               const set<_Key,_Compare,_Alloc>& __y);
  82
  83   template<class _Key, class _Compare, class _Alloc>
  84     class set
  85     {
  86       // concept requirements
  87       __glibcxx_class_requires(_Key, _SGIAssignableConcept)
  88       __glibcxx_class_requires4(_Compare, bool, _Key, _Key, _BinaryFunctionConcept)
  89
  90         public:
  91       // typedefs:
  92       typedef _Key     key_type;
  93       typedef _Key     value_type;
  94       typedef _Compare key_compare;
  95       typedef _Compare value_compare;
  96 private:
  97   typedef _Rb_tree<key_type, value_type,
  98                   _Identity<value_type>, key_compare, _Alloc> _Rep_type;
  99   _Rep_type _M_t;  // red-black tree representing set
 100 public:
 101   typedef typename _Alloc::pointer pointer;
 102   typedef typename _Alloc::const_pointer const_pointer;
 103   typedef typename _Alloc::reference reference;
 104   typedef typename _Alloc::const_reference const_reference;
 105   typedef typename _Rep_type::const_iterator iterator;
 106   typedef typename _Rep_type::const_iterator const_iterator;
 107   typedef typename _Rep_type::const_reverse_iterator reverse_iterator;
 108   typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
 109   typedef typename _Rep_type::size_type size_type;
 110   typedef typename _Rep_type::difference_type difference_type;
 111   typedef typename _Rep_type::allocator_type allocator_type;
 112
 113   // allocation/deallocation
 114
 115   set() : _M_t(_Compare(), allocator_type()) {}
 116   explicit set(const _Compare& __comp,
 117                const allocator_type& __a = allocator_type())
 118     : _M_t(__comp, __a) {}
 119
 120   template<class _InputIterator>
 121   set(_InputIterator __first, _InputIterator __last)
 122     : _M_t(_Compare(), allocator_type())
 123     { _M_t.insert_unique(__first, __last); }
 124
 125   template<class _InputIterator>
 126   set(_InputIterator __first, _InputIterator __last, const _Compare& __comp,
 127       const allocator_type& __a = allocator_type())
 128     : _M_t(__comp, __a) { _M_t.insert_unique(__first, __last); }
 129
 130   set(const set<_Key,_Compare,_Alloc>& __x) : _M_t(__x._M_t) {}
 131   set<_Key,_Compare,_Alloc>& operator=(const set<_Key, _Compare, _Alloc>& __x)
 132   {
 133     _M_t = __x._M_t;
 134     return *this;
 135   }
 136
 137   // accessors:
 138
 139   key_compare key_comp() const { return _M_t.key_comp(); }
 140   value_compare value_comp() const { return _M_t.key_comp(); }
 141   allocator_type get_allocator() const { return _M_t.get_allocator(); }
 142
 143   iterator begin() const { return _M_t.begin(); }
 144   iterator end() const { return _M_t.end(); }
 145   reverse_iterator rbegin() const { return _M_t.rbegin(); }
 146   reverse_iterator rend() const { return _M_t.rend(); }
 147   bool empty() const { return _M_t.empty(); }
 148   size_type size() const { return _M_t.size(); }
 149   size_type max_size() const { return _M_t.max_size(); }
 150   void swap(set<_Key,_Compare,_Alloc>& __x) { _M_t.swap(__x._M_t); }
 151
 152   // insert/erase
 153   pair<iterator,bool> insert(const value_type& __x) {
 154     pair<typename _Rep_type::iterator, bool> __p = _M_t.insert_unique(__x);
 155     return pair<iterator, bool>(__p.first, __p.second);
 156   }
 157   iterator insert(iterator __position, const value_type& __x) {
 158     typedef typename _Rep_type::iterator _Rep_iterator;
 159     return _M_t.insert_unique((_Rep_iterator&)__position, __x);
 160   }
 161   template<class _InputIterator>
 162   void insert(_InputIterator __first, _InputIterator __last) {
 163     _M_t.insert_unique(__first, __last);
 164   }
 165   void erase(iterator __position) {
 166     typedef typename _Rep_type::iterator _Rep_iterator;
 167     _M_t.erase((_Rep_iterator&)__position);
 168   }
 169   size_type erase(const key_type& __x) {
 170     return _M_t.erase(__x);
 171   }
 172   void erase(iterator __first, iterator __last) {
 173     typedef typename _Rep_type::iterator _Rep_iterator;
 174     _M_t.erase((_Rep_iterator&)__first, (_Rep_iterator&)__last);
 175   }
 176   void clear() { _M_t.clear(); }
 177
 178   // set operations:
 179
 180   size_type count(const key_type& __x) const {
 181     return _M_t.find(__x) == _M_t.end() ? 0 : 1;
 182   }
 183
 184   // _GLIBCXX_RESOLVE_LIB_DEFECTS
 185   // 214.  set::find() missing const overload
 186   iterator find(const key_type& __x) { return _M_t.find(__x); }
 187   const_iterator find(const key_type& __x) const { return _M_t.find(__x); }
 188   iterator lower_bound(const key_type& __x) {
 189     return _M_t.lower_bound(__x);
 190   }
 191   const_iterator lower_bound(const key_type& __x) const {
 192     return _M_t.lower_bound(__x);
 193   }
 194   iterator upper_bound(const key_type& __x) {
 195     return _M_t.upper_bound(__x);
 196   }
 197   const_iterator upper_bound(const key_type& __x) const {
 198     return _M_t.upper_bound(__x);
 199   }
 200   pair<iterator,iterator> equal_range(const key_type& __x) {
 201     return _M_t.equal_range(__x);
 202   }
 203   pair<const_iterator,const_iterator> equal_range(const key_type& __x) const {
 204     return _M_t.equal_range(__x);
 205   }
 206
 207   template<class _K1, class _C1, class _A1>
 208   friend bool operator== (const set<_K1,_C1,_A1>&, const set<_K1,_C1,_A1>&);
 209   template<class _K1, class _C1, class _A1>
 210   friend bool operator< (const set<_K1,_C1,_A1>&, const set<_K1,_C1,_A1>&);
 211 };
 212
 213 template<class _Key, class _Compare, class _Alloc>
 214 inline bool operator==(const set<_Key,_Compare,_Alloc>& __x,
 215                        const set<_Key,_Compare,_Alloc>& __y) {
 216   return __x._M_t == __y._M_t;
 217 }
 218
 219 template<class _Key, class _Compare, class _Alloc>
 220 inline bool operator<(const set<_Key,_Compare,_Alloc>& __x,
 221                       const set<_Key,_Compare,_Alloc>& __y) {
 222   return __x._M_t < __y._M_t;
 223 }
 224
 225 template<class _Key, class _Compare, class _Alloc>
 226 inline bool operator!=(const set<_Key,_Compare,_Alloc>& __x,
 227                        const set<_Key,_Compare,_Alloc>& __y) {
 228   return !(__x == __y);
 229 }
 230
 231 template<class _Key, class _Compare, class _Alloc>
 232 inline bool operator>(const set<_Key,_Compare,_Alloc>& __x,
 233                       const set<_Key,_Compare,_Alloc>& __y) {
 234   return __y < __x;
 235 }
 236
 237 template<class _Key, class _Compare, class _Alloc>
 238 inline bool operator<=(const set<_Key,_Compare,_Alloc>& __x,
 239                        const set<_Key,_Compare,_Alloc>& __y) {
 240   return !(__y < __x);
 241 }
 242
 243 template<class _Key, class _Compare, class _Alloc>
 244 inline bool operator>=(const set<_Key,_Compare,_Alloc>& __x,
 245                        const set<_Key,_Compare,_Alloc>& __y) {
 246   return !(__x < __y);
 247 }
 248
 249 template<class _Key, class _Compare, class _Alloc>
 250 inline void swap(set<_Key,_Compare,_Alloc>& __x,
 251                  set<_Key,_Compare,_Alloc>& __y) {
 252   __x.swap(__y);
 253 }
 254
 255 } // namespace __gnu_norm
 256
 257 #endif /* _SET_H */