LCOV - app.info - /tools/gcc-4.5/include/c++/4.5.2/bits/stl_pair.h

LCOV - code coverage report
| Current view: | directory - tools/gcc-4.5/include/c++/4.5.2/bits - stl_pair.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 15 | 15 | 100.0 %
| Date: | 2012-04-07 | Functions: | 62 | 51 | 82.3 %

           1                 : // Pair implementation -*- C++ -*-
           2                 :
           3                 : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
           4                 : // Free Software Foundation, Inc.
           5                 : //
           6                 : // This file is part of the GNU ISO C++ Library.  This library is free
           7                 : // software; you can redistribute it and/or modify it under the
           8                 : // terms of the GNU General Public License as published by the
           9                 : // Free Software Foundation; either version 3, or (at your option)
          10                 : // any later version.
          11                 :
          12                 : // This library is distributed in the hope that it will be useful,
          13                 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
          14                 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
          15                 : // GNU General Public License for more details.
          16                 :
          17                 : // Under Section 7 of GPL version 3, you are granted additional
          18                 : // permissions described in the GCC Runtime Library Exception, version
          19                 : // 3.1, as published by the Free Software Foundation.
          20                 :
          21                 : // You should have received a copy of the GNU General Public License and
          22                 : // a copy of the GCC Runtime Library Exception along with this program;
          23                 : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
          24                 : // <http://www.gnu.org/licenses/>.
          25                 :
          26                 : /*
          27                 :  *
          28                 :  * Copyright (c) 1994
          29                 :  * Hewlett-Packard Company
          30                 :  *
          31                 :  * Permission to use, copy, modify, distribute and sell this software
          32                 :  * and its documentation for any purpose is hereby granted without fee,
          33                 :  * provided that the above copyright notice appear in all copies and
          34                 :  * that both that copyright notice and this permission notice appear
          35                 :  * in supporting documentation.  Hewlett-Packard Company makes no
          36                 :  * representations about the suitability of this software for any
          37                 :  * purpose.  It is provided "as is" without express or implied warranty.
          38                 :  *
          39                 :  *
          40                 :  * Copyright (c) 1996,1997
          41                 :  * Silicon Graphics Computer Systems, Inc.
          42                 :  *
          43                 :  * Permission to use, copy, modify, distribute and sell this software
          44                 :  * and its documentation for any purpose is hereby granted without fee,
          45                 :  * provided that the above copyright notice appear in all copies and
          46                 :  * that both that copyright notice and this permission notice appear
          47                 :  * in supporting documentation.  Silicon Graphics makes no
          48                 :  * representations about the suitability of this software for any
          49                 :  * purpose.  It is provided "as is" without express or implied warranty.
          50                 :  */
          51                 :
          52                 : /** @file stl_pair.h
          53                 :  *  This is an internal header file, included by other library headers.
          54                 :  *  You should not attempt to use it directly.
          55                 :  */
          56                 :
          57                 : #ifndef _STL_PAIR_H
          58                 : #define _STL_PAIR_H 1
          59                 :
          60                 : #include <bits/move.h> // for std::move / std::forward, std::decay, and
          61                 :                        // std::swap
          62                 :
          63                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
          64                 : #include <type_traits>
          65                 : #endif
          66                 :
          67                 : _GLIBCXX_BEGIN_NAMESPACE(std)
          68                 :
          69                 :   /// pair holds two objects of arbitrary type.
          70                 :   template<class _T1, class _T2>
          71                 :     struct pair
          72        48525249 :     {
          73                 :       typedef _T1 first_type;    ///<  @c first_type is the first bound type
          74                 :       typedef _T2 second_type;   ///<  @c second_type is the second bound type
          75                 :
          76                 :       _T1 first;                 ///< @c first is a copy of the first object
          77                 :       _T2 second;                ///< @c second is a copy of the second object
          78                 :
          79                 :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
          80                 :       // 265.  std::pair::pair() effects overly restrictive
          81                 :       /** The default constructor creates @c first and @c second using their
          82                 :        *  respective default constructors.  */
          83            4979 :       pair()
          84            4979 :       : first(), second() { }
          85                 :
          86                 :       /** Two objects may be passed to a @c pair constructor to be copied.  */
          87                 :       pair(const _T1& __a, const _T2& __b)
          88                 :       : first(__a), second(__b) { }
          89                 :
          90                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
          91                 :       // DR 811.
          92                 :       template<class _U1, class = typename
          93                 :                std::enable_if<std::is_convertible<_U1, _T1>::value>::type>
          94                 :         pair(_U1&& __x, const _T2& __y)
          95                 :         : first(std::forward<_U1>(__x)),
          96                 :           second(__y) { }
          97                 :
          98                 :       template<class _U2, class = typename
          99                 :                std::enable_if<std::is_convertible<_U2, _T2>::value>::type>
         100        16541621 :         pair(const _T1& __x, _U2&& __y)
         101                 :         : first(__x),
         102        16541621 :           second(std::forward<_U2>(__y)) { }
         103                 :
         104                 :       template<class _U1, class _U2, class = typename
         105                 :                std::enable_if<std::is_convertible<_U1, _T1>::value
         106                 :                               && std::is_convertible<_U2, _T2>::value>::type>
         107        32420798 :         pair(_U1&& __x, _U2&& __y)
         108                 :         : first(std::forward<_U1>(__x)),
         109        32420798 :           second(std::forward<_U2>(__y)) { }
         110                 : #endif
         111                 :
         112                 :       /** There is also a templated copy ctor for the @c pair class itself.  */
         113                 :       template<class _U1, class _U2>
         114                 :         pair(const pair<_U1, _U2>& __p)
         115                 :         : first(__p.first),
         116                 :           second(__p.second) { }
         117                 :
         118                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
         119                 :       template<class _U1, class _U2>
         120        53483383 :         pair(pair<_U1, _U2>&& __p)
         121                 :         : first(std::forward<_U1>(__p.first)),
         122        53483383 :           second(std::forward<_U2>(__p.second)) { }
         123                 :
         124                 :       pair&
         125            4979 :       operator=(pair&& __p)
         126                 :       {
         127            4979 :         first = std::move(__p.first);
         128            4979 :         second = std::move(__p.second);
         129            4979 :         return *this;
         130                 :       }
         131                 :
         132                 :       template<class _U1, class _U2>
         133                 :         pair&
         134                 :         operator=(pair<_U1, _U2>&& __p)
         135                 :         {
         136                 :           first = std::move(__p.first);
         137                 :           second = std::move(__p.second);
         138                 :           return *this;
         139                 :         }
         140                 :
         141                 :       void
         142                 :       swap(pair& __p)
         143                 :       {
         144                 :         using std::swap;
         145                 :         swap(first, __p.first);
         146                 :         swap(second, __p.second);
         147                 :       }
         148                 : #endif
         149                 :     };
         150                 :
         151                 :   /// Two pairs of the same type are equal iff their members are equal.
         152                 :   template<class _T1, class _T2>
         153                 :     inline bool
         154                 :     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         155                 :     { return __x.first == __y.first && __x.second == __y.second; }
         156                 :
         157                 :   /// <http://gcc.gnu.org/onlinedocs/libstdc++/manual/utilities.html>
         158                 :   template<class _T1, class _T2>
         159                 :     inline bool
         160                 :     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         161                 :     { return __x.first < __y.first
         162                 :              || (!(__y.first < __x.first) && __x.second < __y.second); }
         163                 :
         164                 :   /// Uses @c operator== to find the result.
         165                 :   template<class _T1, class _T2>
         166                 :     inline bool
         167                 :     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         168                 :     { return !(__x == __y); }
         169                 :
         170                 :   /// Uses @c operator< to find the result.
         171                 :   template<class _T1, class _T2>
         172                 :     inline bool
         173                 :     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         174                 :     { return __y < __x; }
         175                 :
         176                 :   /// Uses @c operator< to find the result.
         177                 :   template<class _T1, class _T2>
         178                 :     inline bool
         179                 :     operator<=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         180                 :     { return !(__y < __x); }
         181                 :
         182                 :   /// Uses @c operator< to find the result.
         183                 :   template<class _T1, class _T2>
         184                 :     inline bool
         185                 :     operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
         186                 :     { return !(__x < __y); }
         187                 :
         188                 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
         189                 :   /// See std::pair::swap().
         190                 :   // Note:  no std::swap overloads in C++03 mode, this has performance
         191                 :   //        implications, see, eg, libstdc++/38466.
         192                 :   template<class _T1, class _T2>
         193                 :     inline void
         194                 :     swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y)
         195                 :     { __x.swap(__y); }
         196                 : #endif
         197                 :
         198                 :   /**
         199                 :    *  @brief A convenience wrapper for creating a pair from two objects.
         200                 :    *  @param  x  The first object.
         201                 :    *  @param  y  The second object.
         202                 :    *  @return   A newly-constructed pair<> object of the appropriate type.
         203                 :    *
         204                 :    *  The standard requires that the objects be passed by reference-to-const,
         205                 :    *  but LWG issue #181 says they should be passed by const value.  We follow
         206                 :    *  the LWG by default.
         207                 :    */
         208                 :   // _GLIBCXX_RESOLVE_LIB_DEFECTS
         209                 :   // 181.  make_pair() unintended behavior
         210                 : #ifndef __GXX_EXPERIMENTAL_CXX0X__
         211                 :   template<class _T1, class _T2>
         212                 :     inline pair<_T1, _T2>
         213                 :     make_pair(_T1 __x, _T2 __y)
         214                 :     { return pair<_T1, _T2>(__x, __y); }
         215                 : #else
         216                 :   template<typename _Tp>
         217                 :     class reference_wrapper;
         218                 :
         219                 :   // Helper which adds a reference to a type when given a reference_wrapper
         220                 :   template<typename _Tp>
         221                 :     struct __strip_reference_wrapper
         222                 :     {
         223                 :       typedef _Tp __type;
         224                 :     };
         225                 :
         226                 :   template<typename _Tp>
         227                 :     struct __strip_reference_wrapper<reference_wrapper<_Tp> >
         228                 :     {
         229                 :       typedef _Tp& __type;
         230                 :     };
         231                 :
         232                 :   template<typename _Tp>
         233                 :     struct __strip_reference_wrapper<const reference_wrapper<_Tp> >
         234                 :     {
         235                 :       typedef _Tp& __type;
         236                 :     };
         237                 :
         238                 :   template<typename _Tp>
         239                 :     struct __decay_and_strip
         240                 :     {
         241                 :       typedef typename __strip_reference_wrapper<
         242                 :         typename decay<_Tp>::type>::__type __type;
         243                 :     };
         244                 :
         245                 :   // NB: DR 706.
         246                 :   template<class _T1, class _T2>
         247                 :     inline pair<typename __decay_and_strip<_T1>::__type,
         248                 :                 typename __decay_and_strip<_T2>::__type>
         249            4979 :     make_pair(_T1&& __x, _T2&& __y)
         250                 :     {
         251                 :       return pair<typename __decay_and_strip<_T1>::__type,
         252                 :                   typename __decay_and_strip<_T2>::__type>
         253            4979 :         (std::forward<_T1>(__x), std::forward<_T2>(__y));
         254                 :     }
         255                 : #endif
         256                 :
         257                 : _GLIBCXX_END_NAMESPACE
         258                 :
         259                 : #endif /* _STL_PAIR_H */

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