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  <title>LCOV - lcov.info - /usr/include/c++/4.3/backward/auto_ptr.h</title>
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  <table width="100%" border=0 cellspacing=0 cellpadding=0>
    <tr><td class="title">LTP GCOV extension - code coverage report</td></tr>
    <tr><td class="ruler"><img src="../../../../../glass.png" width=3 height=3 alt=""></td></tr>

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          <td class="headerItem" width="20%">Current&nbsp;view:</td>
          <td class="headerValue" width="80%" colspan=4><a href="../../../../../index.html">directory</a> - <a href="index.html">usr/include/c++/4.3/backward</a> - auto_ptr.h</td>
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          <td class="headerItem" width="20%">Test:</td>
          <td class="headerValue" width="80%" colspan=4>lcov.info</td>
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          <td class="headerItem" width="20%">Date:</td>
          <td class="headerValue" width="20%">2008-08-14</td>
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          <td class="headerItem" width="20%">Instrumented&nbsp;lines:</td>
          <td class="headerValue" width="20%">15</td>
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          <td class="headerItem" width="20%">Code&nbsp;covered:</td>
          <td class="headerValue" width="20%">100.0 %</td>
          <td width="20%"></td>
          <td class="headerItem" width="20%">Executed&nbsp;lines:</td>
          <td class="headerValue" width="20%">15</td>
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    <tr>
      <td><pre class="source">
<span class="lineNum">       1 </span>                : // auto_ptr implementation -*- C++ -*-
<span class="lineNum">       2 </span>                : 
<span class="lineNum">       3 </span>                : // Copyright (C) 2007, 2008 Free Software Foundation, Inc.
<span class="lineNum">       4 </span>                : //
<span class="lineNum">       5 </span>                : // This file is part of the GNU ISO C++ Library.  This library is free
<span class="lineNum">       6 </span>                : // software; you can redistribute it and/or modify it under the
<span class="lineNum">       7 </span>                : // terms of the GNU General Public License as published by the
<span class="lineNum">       8 </span>                : // Free Software Foundation; either version 2, or (at your option)
<span class="lineNum">       9 </span>                : // any later version.
<span class="lineNum">      10 </span>                : 
<span class="lineNum">      11 </span>                : // This library is distributed in the hope that it will be useful,
<span class="lineNum">      12 </span>                : // but WITHOUT ANY WARRANTY; without even the implied warranty of
<span class="lineNum">      13 </span>                : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
<span class="lineNum">      14 </span>                : // GNU General Public License for more details.
<span class="lineNum">      15 </span>                : 
<span class="lineNum">      16 </span>                : // You should have received a copy of the GNU General Public License
<span class="lineNum">      17 </span>                : // along with this library; see the file COPYING.  If not, write to
<span class="lineNum">      18 </span>                : // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
<span class="lineNum">      19 </span>                : // Boston, MA 02110-1301, USA.
<span class="lineNum">      20 </span>                : 
<span class="lineNum">      21 </span>                : // As a special exception, you may use this file as part of a free software
<span class="lineNum">      22 </span>                : // library without restriction.  Specifically, if other files instantiate
<span class="lineNum">      23 </span>                : // templates or use macros or inline functions from this file, or you compile
<span class="lineNum">      24 </span>                : // this file and link it with other files to produce an executable, this
<span class="lineNum">      25 </span>                : // file does not by itself cause the resulting executable to be covered by
<span class="lineNum">      26 </span>                : // the GNU General Public License.  This exception does not however
<span class="lineNum">      27 </span>                : // invalidate any other reasons why the executable file might be covered by
<span class="lineNum">      28 </span>                : // the GNU General Public License.
<span class="lineNum">      29 </span>                : 
<span class="lineNum">      30 </span>                : /** @file backward/auto_ptr.h
<span class="lineNum">      31 </span>                :  *  This is an internal header file, included by other library headers.
<span class="lineNum">      32 </span>                :  *  You should not attempt to use it directly.
<span class="lineNum">      33 </span>                :  */
<span class="lineNum">      34 </span>                : 
<span class="lineNum">      35 </span>                : #ifndef _STL_AUTO_PTR_H
<span class="lineNum">      36 </span>                : #define _STL_AUTO_PTR_H 1
<span class="lineNum">      37 </span>                : 
<span class="lineNum">      38 </span>                : #include &lt;bits/c++config.h&gt;
<span class="lineNum">      39 </span>                : #include &lt;debug/debug.h&gt;
<span class="lineNum">      40 </span>                : 
<span class="lineNum">      41 </span>                : _GLIBCXX_BEGIN_NAMESPACE(std)
<span class="lineNum">      42 </span>                : 
<span class="lineNum">      43 </span>                :   /**
<span class="lineNum">      44 </span>                :    *  A wrapper class to provide auto_ptr with reference semantics.
<span class="lineNum">      45 </span>                :    *  For example, an auto_ptr can be assigned (or constructed from)
<span class="lineNum">      46 </span>                :    *  the result of a function which returns an auto_ptr by value.
<span class="lineNum">      47 </span>                :    *
<span class="lineNum">      48 </span>                :    *  All the auto_ptr_ref stuff should happen behind the scenes.
<span class="lineNum">      49 </span>                :    */
<span class="lineNum">      50 </span>                :   template&lt;typename _Tp1&gt;
<span class="lineNum">      51 </span>                :     struct auto_ptr_ref
<span class="lineNum">      52 </span>                :     {
<span class="lineNum">      53 </span>                :       _Tp1* _M_ptr;
<span class="lineNum">      54 </span>                :       
<span class="lineNum">      55 </span>                :       explicit
<span class="lineNum">      56 </span><span class="lineCov">            666 :       auto_ptr_ref(_Tp1* __p): _M_ptr(__p) { }</span>
<span class="lineNum">      57 </span>                :     } _GLIBCXX_DEPRECATED_ATTR;
<span class="lineNum">      58 </span>                : 
<span class="lineNum">      59 </span>                : 
<span class="lineNum">      60 </span>                :   /**
<span class="lineNum">      61 </span>                :    *  @brief  A simple smart pointer providing strict ownership semantics.
<span class="lineNum">      62 </span>                :    *
<span class="lineNum">      63 </span>                :    *  The Standard says:
<span class="lineNum">      64 </span>                :    *  &lt;pre&gt;
<span class="lineNum">      65 </span>                :    *  An @c auto_ptr owns the object it holds a pointer to.  Copying
<span class="lineNum">      66 </span>                :    *  an @c auto_ptr copies the pointer and transfers ownership to the
<span class="lineNum">      67 </span>                :    *  destination.  If more than one @c auto_ptr owns the same object
<span class="lineNum">      68 </span>                :    *  at the same time the behavior of the program is undefined.
<span class="lineNum">      69 </span>                :    *
<span class="lineNum">      70 </span>                :    *  The uses of @c auto_ptr include providing temporary
<span class="lineNum">      71 </span>                :    *  exception-safety for dynamically allocated memory, passing
<span class="lineNum">      72 </span>                :    *  ownership of dynamically allocated memory to a function, and
<span class="lineNum">      73 </span>                :    *  returning dynamically allocated memory from a function.  @c
<span class="lineNum">      74 </span>                :    *  auto_ptr does not meet the CopyConstructible and Assignable
<span class="lineNum">      75 </span>                :    *  requirements for Standard Library &lt;a
<span class="lineNum">      76 </span>                :    *  href=&quot;tables.html#65&quot;&gt;container&lt;/a&gt; elements and thus
<span class="lineNum">      77 </span>                :    *  instantiating a Standard Library container with an @c auto_ptr
<span class="lineNum">      78 </span>                :    *  results in undefined behavior.
<span class="lineNum">      79 </span>                :    *  &lt;/pre&gt;
<span class="lineNum">      80 </span>                :    *  Quoted from [20.4.5]/3.
<span class="lineNum">      81 </span>                :    *
<span class="lineNum">      82 </span>                :    *  Good examples of what can and cannot be done with auto_ptr can
<span class="lineNum">      83 </span>                :    *  be found in the libstdc++ testsuite.
<span class="lineNum">      84 </span>                :    *
<span class="lineNum">      85 </span>                :    *  _GLIBCXX_RESOLVE_LIB_DEFECTS
<span class="lineNum">      86 </span>                :    *  127.  auto_ptr&lt;&gt; conversion issues
<span class="lineNum">      87 </span>                :    *  These resolutions have all been incorporated.
<span class="lineNum">      88 </span>                :    */
<span class="lineNum">      89 </span>                :   template&lt;typename _Tp&gt;
<span class="lineNum">      90 </span>                :     class auto_ptr
<span class="lineNum">      91 </span>                :     {
<span class="lineNum">      92 </span>                :     private:
<span class="lineNum">      93 </span>                :       _Tp* _M_ptr;
<span class="lineNum">      94 </span>                :       
<span class="lineNum">      95 </span>                :     public:
<span class="lineNum">      96 </span>                :       /// The pointed-to type.
<span class="lineNum">      97 </span>                :       typedef _Tp element_type;
<span class="lineNum">      98 </span>                :       
<span class="lineNum">      99 </span>                :       /**
<span class="lineNum">     100 </span>                :        *  @brief  An %auto_ptr is usually constructed from a raw pointer.
<span class="lineNum">     101 </span>                :        *  @param  p  A pointer (defaults to NULL).
<span class="lineNum">     102 </span>                :        *
<span class="lineNum">     103 </span>                :        *  This object now @e owns the object pointed to by @a p.
<span class="lineNum">     104 </span>                :        */
<span class="lineNum">     105 </span>                :       explicit
<span class="lineNum">     106 </span><span class="lineCov">            666 :       auto_ptr(element_type* __p = 0) throw() : _M_ptr(__p) { }</span>
<span class="lineNum">     107 </span>                : 
<span class="lineNum">     108 </span>                :       /**
<span class="lineNum">     109 </span>                :        *  @brief  An %auto_ptr can be constructed from another %auto_ptr.
<span class="lineNum">     110 </span>                :        *  @param  a  Another %auto_ptr of the same type.
<span class="lineNum">     111 </span>                :        *
<span class="lineNum">     112 </span>                :        *  This object now @e owns the object previously owned by @a a,
<span class="lineNum">     113 </span>                :        *  which has given up ownership.
<span class="lineNum">     114 </span>                :        */
<span class="lineNum">     115 </span><span class="lineCov">            590 :       auto_ptr(auto_ptr&amp; __a) throw() : _M_ptr(__a.release()) { }</span>
<span class="lineNum">     116 </span>                : 
<span class="lineNum">     117 </span>                :       /**
<span class="lineNum">     118 </span>                :        *  @brief  An %auto_ptr can be constructed from another %auto_ptr.
<span class="lineNum">     119 </span>                :        *  @param  a  Another %auto_ptr of a different but related type.
<span class="lineNum">     120 </span>                :        *
<span class="lineNum">     121 </span>                :        *  A pointer-to-Tp1 must be convertible to a
<span class="lineNum">     122 </span>                :        *  pointer-to-Tp/element_type.
<span class="lineNum">     123 </span>                :        *
<span class="lineNum">     124 </span>                :        *  This object now @e owns the object previously owned by @a a,
<span class="lineNum">     125 </span>                :        *  which has given up ownership.
<span class="lineNum">     126 </span>                :        */
<span class="lineNum">     127 </span>                :       template&lt;typename _Tp1&gt;
<span class="lineNum">     128 </span>                :         auto_ptr(auto_ptr&lt;_Tp1&gt;&amp; __a) throw() : _M_ptr(__a.release()) { }
<span class="lineNum">     129 </span>                : 
<span class="lineNum">     130 </span>                :       /**
<span class="lineNum">     131 </span>                :        *  @brief  %auto_ptr assignment operator.
<span class="lineNum">     132 </span>                :        *  @param  a  Another %auto_ptr of the same type.
<span class="lineNum">     133 </span>                :        *
<span class="lineNum">     134 </span>                :        *  This object now @e owns the object previously owned by @a a,
<span class="lineNum">     135 </span>                :        *  which has given up ownership.  The object that this one @e
<span class="lineNum">     136 </span>                :        *  used to own and track has been deleted.
<span class="lineNum">     137 </span>                :        */
<span class="lineNum">     138 </span>                :       auto_ptr&amp;
<span class="lineNum">     139 </span>                :       operator=(auto_ptr&amp; __a) throw()
<span class="lineNum">     140 </span>                :       {
<span class="lineNum">     141 </span>                :         reset(__a.release());
<span class="lineNum">     142 </span>                :         return *this;
<span class="lineNum">     143 </span>                :       }
<span class="lineNum">     144 </span>                : 
<span class="lineNum">     145 </span>                :       /**
<span class="lineNum">     146 </span>                :        *  @brief  %auto_ptr assignment operator.
<span class="lineNum">     147 </span>                :        *  @param  a  Another %auto_ptr of a different but related type.
<span class="lineNum">     148 </span>                :        *
<span class="lineNum">     149 </span>                :        *  A pointer-to-Tp1 must be convertible to a pointer-to-Tp/element_type.
<span class="lineNum">     150 </span>                :        *
<span class="lineNum">     151 </span>                :        *  This object now @e owns the object previously owned by @a a,
<span class="lineNum">     152 </span>                :        *  which has given up ownership.  The object that this one @e
<span class="lineNum">     153 </span>                :        *  used to own and track has been deleted.
<span class="lineNum">     154 </span>                :        */
<span class="lineNum">     155 </span>                :       template&lt;typename _Tp1&gt;
<span class="lineNum">     156 </span>                :         auto_ptr&amp;
<span class="lineNum">     157 </span>                :         operator=(auto_ptr&lt;_Tp1&gt;&amp; __a) throw()
<span class="lineNum">     158 </span>                :         {
<span class="lineNum">     159 </span>                :           reset(__a.release());
<span class="lineNum">     160 </span>                :           return *this;
<span class="lineNum">     161 </span>                :         }
<span class="lineNum">     162 </span>                : 
<span class="lineNum">     163 </span>                :       /**
<span class="lineNum">     164 </span>                :        *  When the %auto_ptr goes out of scope, the object it owns is
<span class="lineNum">     165 </span>                :        *  deleted.  If it no longer owns anything (i.e., @c get() is
<span class="lineNum">     166 </span>                :        *  @c NULL), then this has no effect.
<span class="lineNum">     167 </span>                :        *
<span class="lineNum">     168 </span>                :        *  The C++ standard says there is supposed to be an empty throw
<span class="lineNum">     169 </span>                :        *  specification here, but omitting it is standard conforming.  Its
<span class="lineNum">     170 </span>                :        *  presence can be detected only if _Tp::~_Tp() throws, but this is
<span class="lineNum">     171 </span>                :        *  prohibited.  [17.4.3.6]/2
<span class="lineNum">     172 </span>                :        */
<span class="lineNum">     173 </span><span class="lineCov">           1922 :       ~auto_ptr() { delete _M_ptr; }</span>
<span class="lineNum">     174 </span>                :       
<span class="lineNum">     175 </span>                :       /**
<span class="lineNum">     176 </span>                :        *  @brief  Smart pointer dereferencing.
<span class="lineNum">     177 </span>                :        *
<span class="lineNum">     178 </span>                :        *  If this %auto_ptr no longer owns anything, then this
<span class="lineNum">     179 </span>                :        *  operation will crash.  (For a smart pointer, &quot;no longer owns
<span class="lineNum">     180 </span>                :        *  anything&quot; is the same as being a null pointer, and you know
<span class="lineNum">     181 </span>                :        *  what happens when you dereference one of those...)
<span class="lineNum">     182 </span>                :        */
<span class="lineNum">     183 </span>                :       element_type&amp;
<span class="lineNum">     184 </span>                :       operator*() const throw() 
<span class="lineNum">     185 </span>                :       {
<span class="lineNum">     186 </span>                :         _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
<span class="lineNum">     187 </span>                :         return *_M_ptr; 
<span class="lineNum">     188 </span>                :       }
<span class="lineNum">     189 </span>                :       
<span class="lineNum">     190 </span>                :       /**
<span class="lineNum">     191 </span>                :        *  @brief  Smart pointer dereferencing.
<span class="lineNum">     192 </span>                :        *
<span class="lineNum">     193 </span>                :        *  This returns the pointer itself, which the language then will
<span class="lineNum">     194 </span>                :        *  automatically cause to be dereferenced.
<span class="lineNum">     195 </span>                :        */
<span class="lineNum">     196 </span>                :       element_type*
<span class="lineNum">     197 </span><span class="lineCov">            590 :       operator-&gt;() const throw() </span>
<span class="lineNum">     198 </span>                :       {
<span class="lineNum">     199 </span>                :         _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
<span class="lineNum">     200 </span><span class="lineCov">            590 :         return _M_ptr; </span>
<span class="lineNum">     201 </span>                :       }
<span class="lineNum">     202 </span>                :       
<span class="lineNum">     203 </span>                :       /**
<span class="lineNum">     204 </span>                :        *  @brief  Bypassing the smart pointer.
<span class="lineNum">     205 </span>                :        *  @return  The raw pointer being managed.
<span class="lineNum">     206 </span>                :        *
<span class="lineNum">     207 </span>                :        *  You can get a copy of the pointer that this object owns, for
<span class="lineNum">     208 </span>                :        *  situations such as passing to a function which only accepts
<span class="lineNum">     209 </span>                :        *  a raw pointer.
<span class="lineNum">     210 </span>                :        *
<span class="lineNum">     211 </span>                :        *  @note  This %auto_ptr still owns the memory.
<span class="lineNum">     212 </span>                :        */
<span class="lineNum">     213 </span>                :       element_type*
<span class="lineNum">     214 </span><span class="lineCov">           1256 :       get() const throw() { return _M_ptr; }</span>
<span class="lineNum">     215 </span>                :       
<span class="lineNum">     216 </span>                :       /**
<span class="lineNum">     217 </span>                :        *  @brief  Bypassing the smart pointer.
<span class="lineNum">     218 </span>                :        *  @return  The raw pointer being managed.
<span class="lineNum">     219 </span>                :        *
<span class="lineNum">     220 </span>                :        *  You can get a copy of the pointer that this object owns, for
<span class="lineNum">     221 </span>                :        *  situations such as passing to a function which only accepts
<span class="lineNum">     222 </span>                :        *  a raw pointer.
<span class="lineNum">     223 </span>                :        *
<span class="lineNum">     224 </span>                :        *  @note  This %auto_ptr no longer owns the memory.  When this object
<span class="lineNum">     225 </span>                :        *  goes out of scope, nothing will happen.
<span class="lineNum">     226 </span>                :        */
<span class="lineNum">     227 </span>                :       element_type*
<span class="lineNum">     228 </span><span class="lineCov">           1256 :       release() throw()</span>
<span class="lineNum">     229 </span>                :       {
<span class="lineNum">     230 </span><span class="lineCov">           1256 :         element_type* __tmp = _M_ptr;</span>
<span class="lineNum">     231 </span><span class="lineCov">           1256 :         _M_ptr = 0;</span>
<span class="lineNum">     232 </span><span class="lineCov">           1256 :         return __tmp;</span>
<span class="lineNum">     233 </span>                :       }
<span class="lineNum">     234 </span>                :       
<span class="lineNum">     235 </span>                :       /**
<span class="lineNum">     236 </span>                :        *  @brief  Forcibly deletes the managed object.
<span class="lineNum">     237 </span>                :        *  @param  p  A pointer (defaults to NULL).
<span class="lineNum">     238 </span>                :        *
<span class="lineNum">     239 </span>                :        *  This object now @e owns the object pointed to by @a p.  The
<span class="lineNum">     240 </span>                :        *  previous object has been deleted.
<span class="lineNum">     241 </span>                :        */
<span class="lineNum">     242 </span>                :       void
<span class="lineNum">     243 </span>                :       reset(element_type* __p = 0) throw()
<span class="lineNum">     244 </span>                :       {
<span class="lineNum">     245 </span>                :         if (__p != _M_ptr)
<span class="lineNum">     246 </span>                :           {
<span class="lineNum">     247 </span>                :             delete _M_ptr;
<span class="lineNum">     248 </span>                :             _M_ptr = __p;
<span class="lineNum">     249 </span>                :           }
<span class="lineNum">     250 </span>                :       }
<span class="lineNum">     251 </span>                :       
<span class="lineNum">     252 </span>                :       /** 
<span class="lineNum">     253 </span>                :        *  @brief  Automatic conversions
<span class="lineNum">     254 </span>                :        *
<span class="lineNum">     255 </span>                :        *  These operations convert an %auto_ptr into and from an auto_ptr_ref
<span class="lineNum">     256 </span>                :        *  automatically as needed.  This allows constructs such as
<span class="lineNum">     257 </span>                :        *  @code
<span class="lineNum">     258 </span>                :        *    auto_ptr&lt;Derived&gt;  func_returning_auto_ptr(.....);
<span class="lineNum">     259 </span>                :        *    ...
<span class="lineNum">     260 </span>                :        *    auto_ptr&lt;Base&gt; ptr = func_returning_auto_ptr(.....);
<span class="lineNum">     261 </span>                :        *  @endcode
<span class="lineNum">     262 </span>                :        */
<span class="lineNum">     263 </span><span class="lineCov">            666 :       auto_ptr(auto_ptr_ref&lt;element_type&gt; __ref) throw()</span>
<span class="lineNum">     264 </span><span class="lineCov">            666 :       : _M_ptr(__ref._M_ptr) { }</span>
<span class="lineNum">     265 </span>                :       
<span class="lineNum">     266 </span>                :       auto_ptr&amp;
<span class="lineNum">     267 </span>                :       operator=(auto_ptr_ref&lt;element_type&gt; __ref) throw()
<span class="lineNum">     268 </span>                :       {
<span class="lineNum">     269 </span>                :         if (__ref._M_ptr != this-&gt;get())
<span class="lineNum">     270 </span>                :           {
<span class="lineNum">     271 </span>                :             delete _M_ptr;
<span class="lineNum">     272 </span>                :             _M_ptr = __ref._M_ptr;
<span class="lineNum">     273 </span>                :           }
<span class="lineNum">     274 </span>                :         return *this;
<span class="lineNum">     275 </span>                :       }
<span class="lineNum">     276 </span>                :       
<span class="lineNum">     277 </span>                :       template&lt;typename _Tp1&gt;
<span class="lineNum">     278 </span><span class="lineCov">            666 :         operator auto_ptr_ref&lt;_Tp1&gt;() throw()</span>
<span class="lineNum">     279 </span><span class="lineCov">            666 :         { return auto_ptr_ref&lt;_Tp1&gt;(this-&gt;release()); }</span>
<span class="lineNum">     280 </span>                : 
<span class="lineNum">     281 </span>                :       template&lt;typename _Tp1&gt;
<span class="lineNum">     282 </span>                :         operator auto_ptr&lt;_Tp1&gt;() throw()
<span class="lineNum">     283 </span>                :         { return auto_ptr&lt;_Tp1&gt;(this-&gt;release()); }
<span class="lineNum">     284 </span>                :     } _GLIBCXX_DEPRECATED_ATTR;
<span class="lineNum">     285 </span>                : 
<span class="lineNum">     286 </span>                :   // _GLIBCXX_RESOLVE_LIB_DEFECTS
<span class="lineNum">     287 </span>                :   // 541. shared_ptr template assignment and void
<span class="lineNum">     288 </span>                :   template&lt;&gt;
<span class="lineNum">     289 </span>                :     class auto_ptr&lt;void&gt;
<span class="lineNum">     290 </span>                :     {
<span class="lineNum">     291 </span>                :     public:
<span class="lineNum">     292 </span>                :       typedef void element_type;
<span class="lineNum">     293 </span>                :     } _GLIBCXX_DEPRECATED_ATTR;
<span class="lineNum">     294 </span>                : 
<span class="lineNum">     295 </span>                : _GLIBCXX_END_NAMESPACE
<span class="lineNum">     296 </span>                : 
<span class="lineNum">     297 </span>                : #endif /* _STL_AUTO_PTR_H */
</pre>
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