LCOV - code coverage report
Current view: top level - bits - stl_stack.h (source / functions) Hit Total Coverage
Test: stap.info Lines: 14 14 100.0 %
Date: 2013-03-08 Functions: 18 18 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // Stack implementation -*- C++ -*-
       2                 :            : 
       3                 :            : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
       4                 :            : // 2010, 2011
       5                 :            : // Free Software Foundation, Inc.
       6                 :            : //
       7                 :            : // This file is part of the GNU ISO C++ Library.  This library is free
       8                 :            : // software; you can redistribute it and/or modify it under the
       9                 :            : // terms of the GNU General Public License as published by the
      10                 :            : // Free Software Foundation; either version 3, or (at your option)
      11                 :            : // any later version.
      12                 :            : 
      13                 :            : // This library is distributed in the hope that it will be useful,
      14                 :            : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      15                 :            : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16                 :            : // GNU General Public License for more details.
      17                 :            : 
      18                 :            : // Under Section 7 of GPL version 3, you are granted additional
      19                 :            : // permissions described in the GCC Runtime Library Exception, version
      20                 :            : // 3.1, as published by the Free Software Foundation.
      21                 :            : 
      22                 :            : // You should have received a copy of the GNU General Public License and
      23                 :            : // a copy of the GCC Runtime Library Exception along with this program;
      24                 :            : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      25                 :            : // <http://www.gnu.org/licenses/>.
      26                 :            : 
      27                 :            : /*
      28                 :            :  *
      29                 :            :  * Copyright (c) 1994
      30                 :            :  * Hewlett-Packard Company
      31                 :            :  *
      32                 :            :  * Permission to use, copy, modify, distribute and sell this software
      33                 :            :  * and its documentation for any purpose is hereby granted without fee,
      34                 :            :  * provided that the above copyright notice appear in all copies and
      35                 :            :  * that both that copyright notice and this permission notice appear
      36                 :            :  * in supporting documentation.  Hewlett-Packard Company makes no
      37                 :            :  * representations about the suitability of this software for any
      38                 :            :  * purpose.  It is provided "as is" without express or implied warranty.
      39                 :            :  *
      40                 :            :  *
      41                 :            :  * Copyright (c) 1996,1997
      42                 :            :  * Silicon Graphics Computer Systems, Inc.
      43                 :            :  *
      44                 :            :  * Permission to use, copy, modify, distribute and sell this software
      45                 :            :  * and its documentation for any purpose is hereby granted without fee,
      46                 :            :  * provided that the above copyright notice appear in all copies and
      47                 :            :  * that both that copyright notice and this permission notice appear
      48                 :            :  * in supporting documentation.  Silicon Graphics makes no
      49                 :            :  * representations about the suitability of this software for any
      50                 :            :  * purpose.  It is provided "as is" without express or implied warranty.
      51                 :            :  */
      52                 :            : 
      53                 :            : /** @file bits/stl_stack.h
      54                 :            :  *  This is an internal header file, included by other library headers.
      55                 :            :  *  Do not attempt to use it directly. @headername{stack}
      56                 :            :  */
      57                 :            : 
      58                 :            : #ifndef _STL_STACK_H
      59                 :            : #define _STL_STACK_H 1
      60                 :            : 
      61                 :            : #include <bits/concept_check.h>
      62                 :            : #include <debug/debug.h>
      63                 :            : 
      64                 :            : namespace std _GLIBCXX_VISIBILITY(default)
      65                 :            : {
      66                 :            : _GLIBCXX_BEGIN_NAMESPACE_VERSION
      67                 :            : 
      68                 :            :   /**
      69                 :            :    *  @brief  A standard container giving FILO behavior.
      70                 :            :    *
      71                 :            :    *  @ingroup sequences
      72                 :            :    *
      73                 :            :    *  Meets many of the requirements of a
      74                 :            :    *  <a href="tables.html#65">container</a>,
      75                 :            :    *  but does not define anything to do with iterators.  Very few of the
      76                 :            :    *  other standard container interfaces are defined.
      77                 :            :    *
      78                 :            :    *  This is not a true container, but an @e adaptor.  It holds
      79                 :            :    *  another container, and provides a wrapper interface to that
      80                 :            :    *  container.  The wrapper is what enforces strict
      81                 :            :    *  first-in-last-out %stack behavior.
      82                 :            :    *
      83                 :            :    *  The second template parameter defines the type of the underlying
      84                 :            :    *  sequence/container.  It defaults to std::deque, but it can be
      85                 :            :    *  any type that supports @c back, @c push_back, and @c pop_front,
      86                 :            :    *  such as std::list, std::vector, or an appropriate user-defined
      87                 :            :    *  type.
      88                 :            :    *
      89                 :            :    *  Members not found in @a normal containers are @c container_type,
      90                 :            :    *  which is a typedef for the second Sequence parameter, and @c
      91                 :            :    *  push, @c pop, and @c top, which are standard %stack/FILO
      92                 :            :    *  operations.
      93                 :            :   */
      94                 :            :   template<typename _Tp, typename _Sequence = deque<_Tp> >
      95                 :    1490737 :     class stack
      96                 :            :     {
      97                 :            :       // concept requirements
      98                 :            :       typedef typename _Sequence::value_type _Sequence_value_type;
      99                 :            :       __glibcxx_class_requires(_Tp, _SGIAssignableConcept)
     100                 :            :       __glibcxx_class_requires(_Sequence, _BackInsertionSequenceConcept)
     101                 :            :       __glibcxx_class_requires2(_Tp, _Sequence_value_type, _SameTypeConcept)
     102                 :            : 
     103                 :            :       template<typename _Tp1, typename _Seq1>
     104                 :            :         friend bool
     105                 :            :         operator==(const stack<_Tp1, _Seq1>&, const stack<_Tp1, _Seq1>&);
     106                 :            : 
     107                 :            :       template<typename _Tp1, typename _Seq1>
     108                 :            :         friend bool
     109                 :            :         operator<(const stack<_Tp1, _Seq1>&, const stack<_Tp1, _Seq1>&);
     110                 :            : 
     111                 :            :     public:
     112                 :            :       typedef typename _Sequence::value_type                value_type;
     113                 :            :       typedef typename _Sequence::reference                 reference;
     114                 :            :       typedef typename _Sequence::const_reference           const_reference;
     115                 :            :       typedef typename _Sequence::size_type                 size_type;
     116                 :            :       typedef          _Sequence                            container_type;
     117                 :            : 
     118                 :            :     protected:
     119                 :            :       //  See queue::c for notes on this name.
     120                 :            :       _Sequence c;
     121                 :            : 
     122                 :            :     public:
     123                 :            :       // XXX removed old def ctor, added def arg to this one to match 14882
     124                 :            :       /**
     125                 :            :        *  @brief  Default constructor creates no elements.
     126                 :            :        */
     127                 :            : #ifndef __GXX_EXPERIMENTAL_CXX0X__
     128                 :            :       explicit
     129                 :    1494391 :       stack(const _Sequence& __c = _Sequence())
     130                 :    1494391 :       : c(__c) { }
     131                 :            : #else
     132                 :            :       explicit
     133                 :            :       stack(const _Sequence& __c)
     134                 :            :       : c(__c) { }
     135                 :            : 
     136                 :            :       explicit
     137                 :            :       stack(_Sequence&& __c = _Sequence())
     138                 :            :       : c(std::move(__c)) { }
     139                 :            : #endif
     140                 :            : 
     141                 :            :       /**
     142                 :            :        *  Returns true if the %stack is empty.
     143                 :            :        */
     144                 :            :       bool
     145                 :   41636693 :       empty() const
     146                 :   41636693 :       { return c.empty(); }
     147                 :            : 
     148                 :            :       /**  Returns the number of elements in the %stack.  */
     149                 :            :       size_type
     150                 :     201702 :       size() const
     151                 :     201702 :       { return c.size(); }
     152                 :            : 
     153                 :            :       /**
     154                 :            :        *  Returns a read/write reference to the data at the first
     155                 :            :        *  element of the %stack.
     156                 :            :        */
     157                 :            :       reference
     158                 :   40858051 :       top()
     159                 :            :       {
     160                 :            :         __glibcxx_requires_nonempty();
     161                 :   40858051 :         return c.back();
     162                 :            :       }
     163                 :            : 
     164                 :            :       /**
     165                 :            :        *  Returns a read-only (constant) reference to the data at the first
     166                 :            :        *  element of the %stack.
     167                 :            :        */
     168                 :            :       const_reference
     169                 :            :       top() const
     170                 :            :       {
     171                 :            :         __glibcxx_requires_nonempty();
     172                 :            :         return c.back();
     173                 :            :       }
     174                 :            : 
     175                 :            :       /**
     176                 :            :        *  @brief  Add data to the top of the %stack.
     177                 :            :        *  @param  __x  Data to be added.
     178                 :            :        *
     179                 :            :        *  This is a typical %stack operation.  The function creates an
     180                 :            :        *  element at the top of the %stack and assigns the given data
     181                 :            :        *  to it.  The time complexity of the operation depends on the
     182                 :            :        *  underlying sequence.
     183                 :            :        */
     184                 :            :       void
     185                 :   41473260 :       push(const value_type& __x)
     186                 :   41473260 :       { c.push_back(__x); }
     187                 :            : 
     188                 :            : #ifdef __GXX_EXPERIMENTAL_CXX0X__
     189                 :            :       void
     190                 :            :       push(value_type&& __x)
     191                 :            :       { c.push_back(std::move(__x)); }
     192                 :            : 
     193                 :            :       template<typename... _Args>
     194                 :            :         void
     195                 :            :         emplace(_Args&&... __args)
     196                 :            :         { c.emplace_back(std::forward<_Args>(__args)...); }
     197                 :            : #endif
     198                 :            : 
     199                 :            :       /**
     200                 :            :        *  @brief  Removes first element.
     201                 :            :        *
     202                 :            :        *  This is a typical %stack operation.  It shrinks the %stack
     203                 :            :        *  by one.  The time complexity of the operation depends on the
     204                 :            :        *  underlying sequence.
     205                 :            :        *
     206                 :            :        *  Note that no data is returned, and if the first element's
     207                 :            :        *  data is needed, it should be retrieved before pop() is
     208                 :            :        *  called.
     209                 :            :        */
     210                 :            :       void
     211                 :   41473245 :       pop()
     212                 :            :       {
     213                 :            :         __glibcxx_requires_nonempty();
     214                 :   41473245 :         c.pop_back();
     215                 :   41473245 :       }
     216                 :            : 
     217                 :            : #ifdef __GXX_EXPERIMENTAL_CXX0X__
     218                 :            :       void
     219                 :            :       swap(stack& __s)
     220                 :            :       noexcept(noexcept(swap(c, __s.c)))
     221                 :            :       {
     222                 :            :         using std::swap;
     223                 :            :         swap(c, __s.c);
     224                 :            :       }
     225                 :            : #endif
     226                 :            :     };
     227                 :            : 
     228                 :            :   /**
     229                 :            :    *  @brief  Stack equality comparison.
     230                 :            :    *  @param  __x  A %stack.
     231                 :            :    *  @param  __y  A %stack of the same type as @a __x.
     232                 :            :    *  @return  True iff the size and elements of the stacks are equal.
     233                 :            :    *
     234                 :            :    *  This is an equivalence relation.  Complexity and semantics
     235                 :            :    *  depend on the underlying sequence type, but the expected rules
     236                 :            :    *  are: this relation is linear in the size of the sequences, and
     237                 :            :    *  stacks are considered equivalent if their sequences compare
     238                 :            :    *  equal.
     239                 :            :   */
     240                 :            :   template<typename _Tp, typename _Seq>
     241                 :            :     inline bool
     242                 :            :     operator==(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     243                 :            :     { return __x.c == __y.c; }
     244                 :            : 
     245                 :            :   /**
     246                 :            :    *  @brief  Stack ordering relation.
     247                 :            :    *  @param  __x  A %stack.
     248                 :            :    *  @param  __y  A %stack of the same type as @a x.
     249                 :            :    *  @return  True iff @a x is lexicographically less than @a __y.
     250                 :            :    *
     251                 :            :    *  This is an total ordering relation.  Complexity and semantics
     252                 :            :    *  depend on the underlying sequence type, but the expected rules
     253                 :            :    *  are: this relation is linear in the size of the sequences, the
     254                 :            :    *  elements must be comparable with @c <, and
     255                 :            :    *  std::lexicographical_compare() is usually used to make the
     256                 :            :    *  determination.
     257                 :            :   */
     258                 :            :   template<typename _Tp, typename _Seq>
     259                 :            :     inline bool
     260                 :            :     operator<(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     261                 :            :     { return __x.c < __y.c; }
     262                 :            : 
     263                 :            :   /// Based on operator==
     264                 :            :   template<typename _Tp, typename _Seq>
     265                 :            :     inline bool
     266                 :            :     operator!=(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     267                 :            :     { return !(__x == __y); }
     268                 :            : 
     269                 :            :   /// Based on operator<
     270                 :            :   template<typename _Tp, typename _Seq>
     271                 :            :     inline bool
     272                 :            :     operator>(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     273                 :            :     { return __y < __x; }
     274                 :            : 
     275                 :            :   /// Based on operator<
     276                 :            :   template<typename _Tp, typename _Seq>
     277                 :            :     inline bool
     278                 :            :     operator<=(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     279                 :            :     { return !(__y < __x); }
     280                 :            : 
     281                 :            :   /// Based on operator<
     282                 :            :   template<typename _Tp, typename _Seq>
     283                 :            :     inline bool
     284                 :            :     operator>=(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     285                 :            :     { return !(__x < __y); }
     286                 :            : 
     287                 :            : #ifdef __GXX_EXPERIMENTAL_CXX0X__
     288                 :            :   template<typename _Tp, typename _Seq>
     289                 :            :     inline void
     290                 :            :     swap(stack<_Tp, _Seq>& __x, stack<_Tp, _Seq>& __y)
     291                 :            :     noexcept(noexcept(__x.swap(__y)))
     292                 :            :     { __x.swap(__y); }
     293                 :            : 
     294                 :            :   template<typename _Tp, typename _Seq, typename _Alloc>
     295                 :            :     struct uses_allocator<stack<_Tp, _Seq>, _Alloc>
     296                 :            :     : public uses_allocator<_Seq, _Alloc>::type { };
     297                 :            : #endif
     298                 :            : 
     299                 :            : _GLIBCXX_END_NAMESPACE_VERSION
     300                 :            : } // namespace
     301                 :            : 
     302                 :            : #endif /* _STL_STACK_H */

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