libstdc++-v3/include/debug/map.h

   1 // Debugging map implementation -*- C++ -*-
   2
   3 // Copyright (C) 2003-2014 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file debug/map.h
  26  *  This file is a GNU debug extension to the Standard C++ Library.
  27  */
  28
  29 #ifndef _GLIBCXX_DEBUG_MAP_H
  30 #define _GLIBCXX_DEBUG_MAP_H 1
  31
  32 #include <debug/safe_sequence.h>
  33 #include <debug/safe_iterator.h>
  34 #include <utility>
  35
  36 namespace std _GLIBCXX_VISIBILITY(default)
  37 {
  38 namespace __debug
  39 {
  40   /// Class std::map with safety/checking/debug instrumentation.
  41   template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>,
  42            typename _Allocator = std::allocator<std::pair<const _Key, _Tp> > >
  43     class map
  44     : public _GLIBCXX_STD_C::map<_Key, _Tp, _Compare, _Allocator>,
  45       public __gnu_debug::_Safe_sequence<map<_Key, _Tp, _Compare, _Allocator> >
  46     {
  47       typedef _GLIBCXX_STD_C::map<_Key, _Tp, _Compare, _Allocator> _Base;
  48
  49       typedef typename _Base::const_iterator _Base_const_iterator;
  50       typedef typename _Base::iterator _Base_iterator;
  51       typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;
  52     public:
  53       // types:
  54       typedef _Key                                  key_type;
  55       typedef _Tp                                   mapped_type;
  56       typedef std::pair<const _Key, _Tp>            value_type;
  57       typedef _Compare                              key_compare;
  58       typedef _Allocator                            allocator_type;
  59       typedef typename _Base::reference             reference;
  60       typedef typename _Base::const_reference       const_reference;
  61
  62       typedef __gnu_debug::_Safe_iterator<_Base_iterator, map>
  63                                                     iterator;
  64       typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, map>
  65                                                     const_iterator;
  66
  67       typedef typename _Base::size_type             size_type;
  68       typedef typename _Base::difference_type       difference_type;
  69       typedef typename _Base::pointer               pointer;
  70       typedef typename _Base::const_pointer         const_pointer;
  71       typedef std::reverse_iterator<iterator>       reverse_iterator;
  72       typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
  73
  74       // 23.3.1.1 construct/copy/destroy:
  75       explicit map(const _Compare& __comp = _Compare(),
  76                    const _Allocator& __a = _Allocator())
  77       : _Base(__comp, __a) { }
  78
  79       template<typename _InputIterator>
  80         map(_InputIterator __first, _InputIterator __last,
  81             const _Compare& __comp = _Compare(),
  82             const _Allocator& __a = _Allocator())
  83         : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
  84                                                                      __last)),
  85                 __gnu_debug::__base(__last),
  86                 __comp, __a) { }
  87
  88       map(const map& __x)
  89       : _Base(__x) { }
  90
  91       map(const _Base& __x)
  92       : _Base(__x) { }
  93
  94 #if __cplusplus >= 201103L
  95       map(map&& __x)
  96       noexcept(is_nothrow_copy_constructible<_Compare>::value)
  97       : _Base(std::move(__x))
  98       { this->_M_swap(__x); }
  99
 100       map(initializer_list<value_type> __l,
 101           const _Compare& __c = _Compare(),
 102           const allocator_type& __a = allocator_type())
 103       : _Base(__l, __c, __a) { }
 104 #endif
 105
 106       ~map() _GLIBCXX_NOEXCEPT { }
 107
 108       map&
 109       operator=(const map& __x)
 110       {
 111         *static_cast<_Base*>(this) = __x;
 112         this->_M_invalidate_all();
 113         return *this;
 114       }
 115
 116 #if __cplusplus >= 201103L
 117       map&
 118       operator=(map&& __x)
 119       {
 120         // NB: DR 1204.
 121         // NB: DR 675.
 122         __glibcxx_check_self_move_assign(__x);
 123         clear();
 124         swap(__x);
 125         return *this;
 126       }
 127
 128       map&
 129       operator=(initializer_list<value_type> __l)
 130       {
 131         this->clear();
 132         this->insert(__l);
 133         return *this;
 134       }
 135 #endif
 136
 137       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 138       // 133. map missing get_allocator()
 139       using _Base::get_allocator;
 140
 141       // iterators:
 142       iterator
 143       begin() _GLIBCXX_NOEXCEPT
 144       { return iterator(_Base::begin(), this); }
 145
 146       const_iterator
 147       begin() const _GLIBCXX_NOEXCEPT
 148       { return const_iterator(_Base::begin(), this); }
 149
 150       iterator
 151       end() _GLIBCXX_NOEXCEPT
 152       { return iterator(_Base::end(), this); }
 153
 154       const_iterator
 155       end() const _GLIBCXX_NOEXCEPT
 156       { return const_iterator(_Base::end(), this); }
 157
 158       reverse_iterator
 159       rbegin() _GLIBCXX_NOEXCEPT
 160       { return reverse_iterator(end()); }
 161
 162       const_reverse_iterator
 163       rbegin() const _GLIBCXX_NOEXCEPT
 164       { return const_reverse_iterator(end()); }
 165
 166       reverse_iterator
 167       rend() _GLIBCXX_NOEXCEPT
 168       { return reverse_iterator(begin()); }
 169
 170       const_reverse_iterator
 171       rend() const _GLIBCXX_NOEXCEPT
 172       { return const_reverse_iterator(begin()); }
 173
 174 #if __cplusplus >= 201103L
 175       const_iterator
 176       cbegin() const noexcept
 177       { return const_iterator(_Base::begin(), this); }
 178
 179       const_iterator
 180       cend() const noexcept
 181       { return const_iterator(_Base::end(), this); }
 182
 183       const_reverse_iterator
 184       crbegin() const noexcept
 185       { return const_reverse_iterator(end()); }
 186
 187       const_reverse_iterator
 188       crend() const noexcept
 189       { return const_reverse_iterator(begin()); }
 190 #endif
 191
 192       // capacity:
 193       using _Base::empty;
 194       using _Base::size;
 195       using _Base::max_size;
 196
 197       // 23.3.1.2 element access:
 198       using _Base::operator[];
 199
 200       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 201       // DR 464. Suggestion for new member functions in standard containers.
 202       using _Base::at;
 203
 204       // modifiers:
 205 #if __cplusplus >= 201103L
 206       template<typename... _Args>
 207         std::pair<iterator, bool>
 208         emplace(_Args&&... __args)
 209         {
 210           auto __res = _Base::emplace(std::forward<_Args>(__args)...);
 211           return std::pair<iterator, bool>(iterator(__res.first, this),
 212                                            __res.second);
 213         }
 214
 215       template<typename... _Args>
 216         iterator
 217         emplace_hint(const_iterator __pos, _Args&&... __args)
 218         {
 219           __glibcxx_check_insert(__pos);
 220           return iterator(_Base::emplace_hint(__pos.base(),
 221                                               std::forward<_Args>(__args)...),
 222                           this);
 223         }
 224 #endif
 225
 226       std::pair<iterator, bool>
 227       insert(const value_type& __x)
 228       {
 229         std::pair<_Base_iterator, bool> __res = _Base::insert(__x);
 230         return std::pair<iterator, bool>(iterator(__res.first, this),
 231                                          __res.second);
 232       }
 233
 234 #if __cplusplus >= 201103L
 235       template<typename _Pair, typename = typename
 236                std::enable_if<std::is_constructible<value_type,
 237                                                     _Pair&&>::value>::type>
 238         std::pair<iterator, bool>
 239         insert(_Pair&& __x)
 240         {
 241           std::pair<_Base_iterator, bool> __res
 242             = _Base::insert(std::forward<_Pair>(__x));
 243           return std::pair<iterator, bool>(iterator(__res.first, this),
 244                                            __res.second);
 245         }
 246 #endif
 247
 248 #if __cplusplus >= 201103L
 249       void
 250       insert(std::initializer_list<value_type> __list)
 251       { _Base::insert(__list); }
 252 #endif
 253
 254       iterator
 255 #if __cplusplus >= 201103L
 256       insert(const_iterator __position, const value_type& __x)
 257 #else
 258       insert(iterator __position, const value_type& __x)
 259 #endif
 260       {
 261         __glibcxx_check_insert(__position);
 262         return iterator(_Base::insert(__position.base(), __x), this);
 263       }
 264
 265 #if __cplusplus >= 201103L
 266       template<typename _Pair, typename = typename
 267                std::enable_if<std::is_constructible<value_type,
 268                                                     _Pair&&>::value>::type>
 269         iterator
 270         insert(const_iterator __position, _Pair&& __x)
 271         {
 272           __glibcxx_check_insert(__position);
 273           return iterator(_Base::insert(__position.base(),
 274                                         std::forward<_Pair>(__x)), this);
 275         }
 276 #endif
 277
 278       template<typename _InputIterator>
 279         void
 280         insert(_InputIterator __first, _InputIterator __last)
 281         {
 282           __glibcxx_check_valid_range(__first, __last);
 283           _Base::insert(__gnu_debug::__base(__first),
 284                         __gnu_debug::__base(__last));
 285         }
 286
 287 #if __cplusplus >= 201103L
 288       iterator
 289       erase(const_iterator __position)
 290       {
 291         __glibcxx_check_erase(__position);
 292         this->_M_invalidate_if(_Equal(__position.base()));
 293         return iterator(_Base::erase(__position.base()), this);
 294       }
 295
 296       iterator
 297       erase(iterator __position)
 298       { return erase(const_iterator(__position)); }
 299 #else
 300       void
 301       erase(iterator __position)
 302       {
 303         __glibcxx_check_erase(__position);
 304         this->_M_invalidate_if(_Equal(__position.base()));
 305         _Base::erase(__position.base());
 306       }
 307 #endif
 308
 309       size_type
 310       erase(const key_type& __x)
 311       {
 312         _Base_iterator __victim = _Base::find(__x);
 313         if (__victim == _Base::end())
 314           return 0;
 315         else
 316           {
 317             this->_M_invalidate_if(_Equal(__victim));
 318             _Base::erase(__victim);
 319             return 1;
 320           }
 321       }
 322
 323 #if __cplusplus >= 201103L
 324       iterator
 325       erase(const_iterator __first, const_iterator __last)
 326       {
 327         // _GLIBCXX_RESOLVE_LIB_DEFECTS
 328         // 151. can't currently clear() empty container
 329         __glibcxx_check_erase_range(__first, __last);
 330         for (_Base_const_iterator __victim = __first.base();
 331              __victim != __last.base(); ++__victim)
 332           {
 333             _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
 334                                   _M_message(__gnu_debug::__msg_valid_range)
 335                                   ._M_iterator(__first, "first")
 336                                   ._M_iterator(__last, "last"));
 337             this->_M_invalidate_if(_Equal(__victim));
 338           }
 339         return iterator(_Base::erase(__first.base(), __last.base()), this);
 340       }
 341 #else
 342       void
 343       erase(iterator __first, iterator __last)
 344       {
 345         // _GLIBCXX_RESOLVE_LIB_DEFECTS
 346         // 151. can't currently clear() empty container
 347         __glibcxx_check_erase_range(__first, __last);
 348         for (_Base_iterator __victim = __first.base();
 349              __victim != __last.base(); ++__victim)
 350           {
 351             _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
 352                                   _M_message(__gnu_debug::__msg_valid_range)
 353                                   ._M_iterator(__first, "first")
 354                                   ._M_iterator(__last, "last"));
 355             this->_M_invalidate_if(_Equal(__victim));
 356           }
 357         _Base::erase(__first.base(), __last.base());
 358       }
 359 #endif
 360
 361       void
 362       swap(map& __x)
 363       {
 364         _Base::swap(__x);
 365         this->_M_swap(__x);
 366       }
 367
 368       void
 369       clear() _GLIBCXX_NOEXCEPT
 370       {
 371         this->_M_invalidate_all();
 372         _Base::clear();
 373       }
 374
 375       // observers:
 376       using _Base::key_comp;
 377       using _Base::value_comp;
 378
 379       // 23.3.1.3 map operations:
 380       iterator
 381       find(const key_type& __x)
 382       { return iterator(_Base::find(__x), this); }
 383
 384       const_iterator
 385       find(const key_type& __x) const
 386       { return const_iterator(_Base::find(__x), this); }
 387
 388       using _Base::count;
 389
 390       iterator
 391       lower_bound(const key_type& __x)
 392       { return iterator(_Base::lower_bound(__x), this); }
 393
 394       const_iterator
 395       lower_bound(const key_type& __x) const
 396       { return const_iterator(_Base::lower_bound(__x), this); }
 397
 398       iterator
 399       upper_bound(const key_type& __x)
 400       { return iterator(_Base::upper_bound(__x), this); }
 401
 402       const_iterator
 403       upper_bound(const key_type& __x) const
 404       { return const_iterator(_Base::upper_bound(__x), this); }
 405
 406       std::pair<iterator,iterator>
 407       equal_range(const key_type& __x)
 408       {
 409         std::pair<_Base_iterator, _Base_iterator> __res =
 410         _Base::equal_range(__x);
 411         return std::make_pair(iterator(__res.first, this),
 412                               iterator(__res.second, this));
 413       }
 414
 415       std::pair<const_iterator,const_iterator>
 416       equal_range(const key_type& __x) const
 417       {
 418         std::pair<_Base_const_iterator, _Base_const_iterator> __res =
 419         _Base::equal_range(__x);
 420         return std::make_pair(const_iterator(__res.first, this),
 421                               const_iterator(__res.second, this));
 422       }
 423
 424       _Base&
 425       _M_base() _GLIBCXX_NOEXCEPT       { return *this; }
 426
 427       const _Base&
 428       _M_base() const _GLIBCXX_NOEXCEPT { return *this; }
 429
 430     private:
 431       void
 432       _M_invalidate_all()
 433       {
 434         typedef __gnu_debug::_Not_equal_to<_Base_const_iterator> _Not_equal;
 435         this->_M_invalidate_if(_Not_equal(_M_base().end()));
 436       }
 437     };
 438
 439   template<typename _Key, typename _Tp,
 440            typename _Compare, typename _Allocator>
 441     inline bool
 442     operator==(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 443                const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 444     { return __lhs._M_base() == __rhs._M_base(); }
 445
 446   template<typename _Key, typename _Tp,
 447            typename _Compare, typename _Allocator>
 448     inline bool
 449     operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 450                const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 451     { return __lhs._M_base() != __rhs._M_base(); }
 452
 453   template<typename _Key, typename _Tp,
 454            typename _Compare, typename _Allocator>
 455     inline bool
 456     operator<(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 457               const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 458     { return __lhs._M_base() < __rhs._M_base(); }
 459
 460   template<typename _Key, typename _Tp,
 461            typename _Compare, typename _Allocator>
 462     inline bool
 463     operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 464                const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 465     { return __lhs._M_base() <= __rhs._M_base(); }
 466
 467   template<typename _Key, typename _Tp,
 468            typename _Compare, typename _Allocator>
 469     inline bool
 470     operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 471                const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 472     { return __lhs._M_base() >= __rhs._M_base(); }
 473
 474   template<typename _Key, typename _Tp,
 475            typename _Compare, typename _Allocator>
 476     inline bool
 477     operator>(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 478               const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 479     { return __lhs._M_base() > __rhs._M_base(); }
 480
 481   template<typename _Key, typename _Tp,
 482            typename _Compare, typename _Allocator>
 483     inline void
 484     swap(map<_Key, _Tp, _Compare, _Allocator>& __lhs,
 485          map<_Key, _Tp, _Compare, _Allocator>& __rhs)
 486     { __lhs.swap(__rhs); }
 487
 488 } // namespace __debug
 489 } // namespace std
 490
 491 #endif