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<a href="a00761.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// auto_ptr implementation -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span>
<a name="l00006"></a>00006 <span class="comment">// software; you can redistribute it and/or modify it under the</span>
<a name="l00007"></a>00007 <span class="comment">// terms of the GNU General Public License as published by the</span>
<a name="l00008"></a>00008 <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00009"></a>00009 <span class="comment">// any later version.</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00014"></a>00014 <span class="comment">// GNU General Public License for more details.</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span>
<a name="l00017"></a>00017 <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span>
<a name="l00018"></a>00018 <span class="comment">// 3.1, as published by the Free Software Foundation.</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="comment">// You should have received a copy of the GNU General Public License and</span>
<a name="l00021"></a>00021 <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span>
<a name="l00022"></a>00022 <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<a name="l00023"></a>00023 <span class="comment">// <http://www.gnu.org/licenses/>.</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment">/** @file backward/auto_ptr.h</span>
<a name="l00026"></a>00026 <span class="comment"> * This is an internal header file, included by other library headers.</span>
<a name="l00027"></a>00027 <span class="comment"> * Do not attempt to use it directly. @headername{memory}</span>
<a name="l00028"></a>00028 <span class="comment"> */</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#ifndef _BACKWARD_AUTO_PTR_H</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define _BACKWARD_AUTO_PTR_H 1</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <<a class="code" href="a00781.html">bits/c++config.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <<a class="code" href="a00851.html">debug/debug.h</a>></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">namespace </span>std _GLIBCXX_VISIBILITY(default)
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 _GLIBCXX_BEGIN_NAMESPACE_VERSION
<a name="l00039"></a>00039 <span class="comment"></span>
<a name="l00040"></a>00040 <span class="comment"> /**</span>
<a name="l00041"></a>00041 <span class="comment"> * A wrapper class to provide auto_ptr with reference semantics.</span>
<a name="l00042"></a>00042 <span class="comment"> * For example, an auto_ptr can be assigned (or constructed from)</span>
<a name="l00043"></a>00043 <span class="comment"> * the result of a function which returns an auto_ptr by value.</span>
<a name="l00044"></a>00044 <span class="comment"> *</span>
<a name="l00045"></a>00045 <span class="comment"> * All the auto_ptr_ref stuff should happen behind the scenes.</span>
<a name="l00046"></a>00046 <span class="comment"> */</span>
<a name="l00047"></a>00047 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1>
<a name="l00048"></a><a class="code" href="a00387.html">00048</a> <span class="keyword">struct </span><a class="code" href="a00387.html">auto_ptr_ref</a>
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 _Tp1* _M_ptr;
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keyword">explicit</span>
<a name="l00053"></a>00053 <a class="code" href="a00387.html">auto_ptr_ref</a>(_Tp1* __p): _M_ptr(__p) { }
<a name="l00054"></a>00054 } _GLIBCXX_DEPRECATED;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="comment"></span>
<a name="l00057"></a>00057 <span class="comment"> /**</span>
<a name="l00058"></a>00058 <span class="comment"> * @brief A simple smart pointer providing strict ownership semantics.</span>
<a name="l00059"></a>00059 <span class="comment"> *</span>
<a name="l00060"></a>00060 <span class="comment"> * The Standard says:</span>
<a name="l00061"></a>00061 <span class="comment"> * <pre></span>
<a name="l00062"></a>00062 <span class="comment"> * An @c auto_ptr owns the object it holds a pointer to. Copying</span>
<a name="l00063"></a>00063 <span class="comment"> * an @c auto_ptr copies the pointer and transfers ownership to the</span>
<a name="l00064"></a>00064 <span class="comment"> * destination. If more than one @c auto_ptr owns the same object</span>
<a name="l00065"></a>00065 <span class="comment"> * at the same time the behavior of the program is undefined.</span>
<a name="l00066"></a>00066 <span class="comment"> *</span>
<a name="l00067"></a>00067 <span class="comment"> * The uses of @c auto_ptr include providing temporary</span>
<a name="l00068"></a>00068 <span class="comment"> * exception-safety for dynamically allocated memory, passing</span>
<a name="l00069"></a>00069 <span class="comment"> * ownership of dynamically allocated memory to a function, and</span>
<a name="l00070"></a>00070 <span class="comment"> * returning dynamically allocated memory from a function. @c</span>
<a name="l00071"></a>00071 <span class="comment"> * auto_ptr does not meet the CopyConstructible and Assignable</span>
<a name="l00072"></a>00072 <span class="comment"> * requirements for Standard Library <a</span>
<a name="l00073"></a>00073 <span class="comment"> * href="tables.html#65">container</a> elements and thus</span>
<a name="l00074"></a>00074 <span class="comment"> * instantiating a Standard Library container with an @c auto_ptr</span>
<a name="l00075"></a>00075 <span class="comment"> * results in undefined behavior.</span>
<a name="l00076"></a>00076 <span class="comment"> * </pre></span>
<a name="l00077"></a>00077 <span class="comment"> * Quoted from [20.4.5]/3.</span>
<a name="l00078"></a>00078 <span class="comment"> *</span>
<a name="l00079"></a>00079 <span class="comment"> * Good examples of what can and cannot be done with auto_ptr can</span>
<a name="l00080"></a>00080 <span class="comment"> * be found in the libstdc++ testsuite.</span>
<a name="l00081"></a>00081 <span class="comment"> *</span>
<a name="l00082"></a>00082 <span class="comment"> * _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<a name="l00083"></a>00083 <span class="comment"> * 127. auto_ptr<> conversion issues</span>
<a name="l00084"></a>00084 <span class="comment"> * These resolutions have all been incorporated.</span>
<a name="l00085"></a>00085 <span class="comment"> */</span>
<a name="l00086"></a>00086 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp>
<a name="l00087"></a><a class="code" href="a00386.html">00087</a> <span class="keyword">class </span><a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keyword">private</span>:
<a name="l00090"></a>00090 _Tp* _M_ptr;
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keyword">public</span>:<span class="comment"></span>
<a name="l00093"></a>00093 <span class="comment"> /// The pointed-to type.</span>
<a name="l00094"></a><a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1">00094</a> <span class="comment"></span> <span class="keyword">typedef</span> _Tp <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>;
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment"> /**</span>
<a name="l00097"></a>00097 <span class="comment"> * @brief An %auto_ptr is usually constructed from a raw pointer.</span>
<a name="l00098"></a>00098 <span class="comment"> * @param p A pointer (defaults to NULL).</span>
<a name="l00099"></a>00099 <span class="comment"> *</span>
<a name="l00100"></a>00100 <span class="comment"> * This object now @e owns the object pointed to by @a p.</span>
<a name="l00101"></a>00101 <span class="comment"> */</span>
<a name="l00102"></a>00102 <span class="keyword">explicit</span>
<a name="l00103"></a><a class="code" href="a00386.html#a4029546a38036de379586d8514a02ebb">00103</a> <a class="code" href="a00386.html#a4029546a38036de379586d8514a02ebb" title="An auto_ptr is usually constructed from a raw pointer.">auto_ptr</a>(<a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>* __p = 0) throw() : _M_ptr(__p) { }
<a name="l00104"></a>00104 <span class="comment"></span>
<a name="l00105"></a>00105 <span class="comment"> /**</span>
<a name="l00106"></a>00106 <span class="comment"> * @brief An %auto_ptr can be constructed from another %auto_ptr.</span>
<a name="l00107"></a>00107 <span class="comment"> * @param a Another %auto_ptr of the same type.</span>
<a name="l00108"></a>00108 <span class="comment"> *</span>
<a name="l00109"></a>00109 <span class="comment"> * This object now @e owns the object previously owned by @a a,</span>
<a name="l00110"></a>00110 <span class="comment"> * which has given up ownership.</span>
<a name="l00111"></a>00111 <span class="comment"> */</span>
<a name="l00112"></a><a class="code" href="a00386.html#aa88c998565d04c8e882a3b579e46c055">00112</a> <a class="code" href="a00386.html#aa88c998565d04c8e882a3b579e46c055" title="An auto_ptr can be constructed from another auto_ptr.">auto_ptr</a>(<a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>& __a) <span class="keywordflow">throw</span>() : _M_ptr(__a.release()) { }
<a name="l00113"></a>00113 <span class="comment"></span>
<a name="l00114"></a>00114 <span class="comment"> /**</span>
<a name="l00115"></a>00115 <span class="comment"> * @brief An %auto_ptr can be constructed from another %auto_ptr.</span>
<a name="l00116"></a>00116 <span class="comment"> * @param a Another %auto_ptr of a different but related type.</span>
<a name="l00117"></a>00117 <span class="comment"> *</span>
<a name="l00118"></a>00118 <span class="comment"> * A pointer-to-Tp1 must be convertible to a</span>
<a name="l00119"></a>00119 <span class="comment"> * pointer-to-Tp/element_type.</span>
<a name="l00120"></a>00120 <span class="comment"> *</span>
<a name="l00121"></a>00121 <span class="comment"> * This object now @e owns the object previously owned by @a a,</span>
<a name="l00122"></a>00122 <span class="comment"> * which has given up ownership.</span>
<a name="l00123"></a>00123 <span class="comment"> */</span>
<a name="l00124"></a>00124 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1>
<a name="l00125"></a><a class="code" href="a00386.html#a62c081d72bad77cc6f4c60e4c0645db0">00125</a> <a class="code" href="a00386.html#a62c081d72bad77cc6f4c60e4c0645db0" title="An auto_ptr can be constructed from another auto_ptr.">auto_ptr</a>(<a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr<_Tp1></a>& __a) <span class="keywordflow">throw</span>() : _M_ptr(__a.release()) { }
<a name="l00126"></a>00126 <span class="comment"></span>
<a name="l00127"></a>00127 <span class="comment"> /**</span>
<a name="l00128"></a>00128 <span class="comment"> * @brief %auto_ptr assignment operator.</span>
<a name="l00129"></a>00129 <span class="comment"> * @param a Another %auto_ptr of the same type.</span>
<a name="l00130"></a>00130 <span class="comment"> *</span>
<a name="l00131"></a>00131 <span class="comment"> * This object now @e owns the object previously owned by @a a,</span>
<a name="l00132"></a>00132 <span class="comment"> * which has given up ownership. The object that this one @e</span>
<a name="l00133"></a>00133 <span class="comment"> * used to own and track has been deleted.</span>
<a name="l00134"></a>00134 <span class="comment"> */</span>
<a name="l00135"></a>00135 <a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>&
<a name="l00136"></a><a class="code" href="a00386.html#af798a3136d8030f2158837fde7373f5b">00136</a> <a class="code" href="a00386.html#af798a3136d8030f2158837fde7373f5b" title="auto_ptr assignment operator.">operator=</a>(<a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>& __a) <span class="keywordflow">throw</span>()
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 <a class="code" href="a00386.html#a7d9519c9b72d8add8292661b822ab7fe" title="Forcibly deletes the managed object.">reset</a>(__a.release());
<a name="l00139"></a>00139 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141 <span class="comment"></span>
<a name="l00142"></a>00142 <span class="comment"> /**</span>
<a name="l00143"></a>00143 <span class="comment"> * @brief %auto_ptr assignment operator.</span>
<a name="l00144"></a>00144 <span class="comment"> * @param a Another %auto_ptr of a different but related type.</span>
<a name="l00145"></a>00145 <span class="comment"> *</span>
<a name="l00146"></a>00146 <span class="comment"> * A pointer-to-Tp1 must be convertible to a pointer-to-Tp/element_type.</span>
<a name="l00147"></a>00147 <span class="comment"> *</span>
<a name="l00148"></a>00148 <span class="comment"> * This object now @e owns the object previously owned by @a a,</span>
<a name="l00149"></a>00149 <span class="comment"> * which has given up ownership. The object that this one @e</span>
<a name="l00150"></a>00150 <span class="comment"> * used to own and track has been deleted.</span>
<a name="l00151"></a>00151 <span class="comment"> */</span>
<a name="l00152"></a>00152 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1>
<a name="l00153"></a>00153 <a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>&
<a name="l00154"></a><a class="code" href="a00386.html#ab64499166ee2f43d4e6e77e3eafac98c">00154</a> <a class="code" href="a00386.html#af798a3136d8030f2158837fde7373f5b" title="auto_ptr assignment operator.">operator=</a>(<a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr<_Tp1></a>& __a) <span class="keywordflow">throw</span>()
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <a class="code" href="a00386.html#a7d9519c9b72d8add8292661b822ab7fe" title="Forcibly deletes the managed object.">reset</a>(__a.release());
<a name="l00157"></a>00157 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159 <span class="comment"></span>
<a name="l00160"></a>00160 <span class="comment"> /**</span>
<a name="l00161"></a>00161 <span class="comment"> * When the %auto_ptr goes out of scope, the object it owns is</span>
<a name="l00162"></a>00162 <span class="comment"> * deleted. If it no longer owns anything (i.e., @c get() is</span>
<a name="l00163"></a>00163 <span class="comment"> * @c NULL), then this has no effect.</span>
<a name="l00164"></a>00164 <span class="comment"> *</span>
<a name="l00165"></a>00165 <span class="comment"> * The C++ standard says there is supposed to be an empty throw</span>
<a name="l00166"></a>00166 <span class="comment"> * specification here, but omitting it is standard conforming. Its</span>
<a name="l00167"></a>00167 <span class="comment"> * presence can be detected only if _Tp::~_Tp() throws, but this is</span>
<a name="l00168"></a>00168 <span class="comment"> * prohibited. [17.4.3.6]/2</span>
<a name="l00169"></a>00169 <span class="comment"> */</span>
<a name="l00170"></a><a class="code" href="a00386.html#a7306f9cb13ae8e32b4a4bc9d8bee2fd1">00170</a> <a class="code" href="a00386.html#a7306f9cb13ae8e32b4a4bc9d8bee2fd1">~auto_ptr</a>() { <span class="keyword">delete</span> _M_ptr; }
<a name="l00171"></a>00171 <span class="comment"></span>
<a name="l00172"></a>00172 <span class="comment"> /**</span>
<a name="l00173"></a>00173 <span class="comment"> * @brief Smart pointer dereferencing.</span>
<a name="l00174"></a>00174 <span class="comment"> *</span>
<a name="l00175"></a>00175 <span class="comment"> * If this %auto_ptr no longer owns anything, then this</span>
<a name="l00176"></a>00176 <span class="comment"> * operation will crash. (For a smart pointer, <em>no longer owns</span>
<a name="l00177"></a>00177 <span class="comment"> * anything</em> is the same as being a null pointer, and you know</span>
<a name="l00178"></a>00178 <span class="comment"> * what happens when you dereference one of those...)</span>
<a name="l00179"></a>00179 <span class="comment"> */</span>
<a name="l00180"></a>00180 <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>&
<a name="l00181"></a><a class="code" href="a00386.html#aa29de43931b66c7c12b29c69dbf2fe2c">00181</a> <a class="code" href="a00386.html#aa29de43931b66c7c12b29c69dbf2fe2c" title="Smart pointer dereferencing.">operator*</a>() <span class="keyword">const</span> throw()
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183 _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
<a name="l00184"></a>00184 <span class="keywordflow">return</span> *_M_ptr;
<a name="l00185"></a>00185 }
<a name="l00186"></a>00186 <span class="comment"></span>
<a name="l00187"></a>00187 <span class="comment"> /**</span>
<a name="l00188"></a>00188 <span class="comment"> * @brief Smart pointer dereferencing.</span>
<a name="l00189"></a>00189 <span class="comment"> *</span>
<a name="l00190"></a>00190 <span class="comment"> * This returns the pointer itself, which the language then will</span>
<a name="l00191"></a>00191 <span class="comment"> * automatically cause to be dereferenced.</span>
<a name="l00192"></a>00192 <span class="comment"> */</span>
<a name="l00193"></a>00193 <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>*
<a name="l00194"></a><a class="code" href="a00386.html#af1cc3046443a2ea0eaa710452365c8ae">00194</a> <a class="code" href="a00386.html#af1cc3046443a2ea0eaa710452365c8ae" title="Smart pointer dereferencing.">operator-></a>() <span class="keyword">const</span> throw()
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
<a name="l00197"></a>00197 <span class="keywordflow">return</span> _M_ptr;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199 <span class="comment"></span>
<a name="l00200"></a>00200 <span class="comment"> /**</span>
<a name="l00201"></a>00201 <span class="comment"> * @brief Bypassing the smart pointer.</span>
<a name="l00202"></a>00202 <span class="comment"> * @return The raw pointer being managed.</span>
<a name="l00203"></a>00203 <span class="comment"> *</span>
<a name="l00204"></a>00204 <span class="comment"> * You can get a copy of the pointer that this object owns, for</span>
<a name="l00205"></a>00205 <span class="comment"> * situations such as passing to a function which only accepts</span>
<a name="l00206"></a>00206 <span class="comment"> * a raw pointer.</span>
<a name="l00207"></a>00207 <span class="comment"> *</span>
<a name="l00208"></a>00208 <span class="comment"> * @note This %auto_ptr still owns the memory.</span>
<a name="l00209"></a>00209 <span class="comment"> */</span>
<a name="l00210"></a>00210 <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>*
<a name="l00211"></a><a class="code" href="a00386.html#ac17a50e1852dcf017ab54ccb5a2d9cf3">00211</a> <span class="keyword">get</span>() <span class="keyword">const</span> <span class="keywordflow">throw</span>() { <span class="keywordflow">return</span> _M_ptr; }
<a name="l00212"></a>00212 <span class="comment"></span>
<a name="l00213"></a>00213 <span class="comment"> /**</span>
<a name="l00214"></a>00214 <span class="comment"> * @brief Bypassing the smart pointer.</span>
<a name="l00215"></a>00215 <span class="comment"> * @return The raw pointer being managed.</span>
<a name="l00216"></a>00216 <span class="comment"> *</span>
<a name="l00217"></a>00217 <span class="comment"> * You can get a copy of the pointer that this object owns, for</span>
<a name="l00218"></a>00218 <span class="comment"> * situations such as passing to a function which only accepts</span>
<a name="l00219"></a>00219 <span class="comment"> * a raw pointer.</span>
<a name="l00220"></a>00220 <span class="comment"> *</span>
<a name="l00221"></a>00221 <span class="comment"> * @note This %auto_ptr no longer owns the memory. When this object</span>
<a name="l00222"></a>00222 <span class="comment"> * goes out of scope, nothing will happen.</span>
<a name="l00223"></a>00223 <span class="comment"> */</span>
<a name="l00224"></a>00224 <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>*
<a name="l00225"></a><a class="code" href="a00386.html#a3cdeabd85acfcac56136924e939c29ef">00225</a> <a class="code" href="a00386.html#a3cdeabd85acfcac56136924e939c29ef" title="Bypassing the smart pointer.">release</a>() throw()
<a name="l00226"></a>00226 {
<a name="l00227"></a>00227 <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>* __tmp = _M_ptr;
<a name="l00228"></a>00228 _M_ptr = 0;
<a name="l00229"></a>00229 <span class="keywordflow">return</span> __tmp;
<a name="l00230"></a>00230 }
<a name="l00231"></a>00231 <span class="comment"></span>
<a name="l00232"></a>00232 <span class="comment"> /**</span>
<a name="l00233"></a>00233 <span class="comment"> * @brief Forcibly deletes the managed object.</span>
<a name="l00234"></a>00234 <span class="comment"> * @param p A pointer (defaults to NULL).</span>
<a name="l00235"></a>00235 <span class="comment"> *</span>
<a name="l00236"></a>00236 <span class="comment"> * This object now @e owns the object pointed to by @a p. The</span>
<a name="l00237"></a>00237 <span class="comment"> * previous object has been deleted.</span>
<a name="l00238"></a>00238 <span class="comment"> */</span>
<a name="l00239"></a>00239 <span class="keywordtype">void</span>
<a name="l00240"></a><a class="code" href="a00386.html#a7d9519c9b72d8add8292661b822ab7fe">00240</a> <a class="code" href="a00386.html#a7d9519c9b72d8add8292661b822ab7fe" title="Forcibly deletes the managed object.">reset</a>(<a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>* __p = 0) throw()
<a name="l00241"></a>00241 {
<a name="l00242"></a>00242 <span class="keywordflow">if</span> (__p != _M_ptr)
<a name="l00243"></a>00243 {
<a name="l00244"></a>00244 <span class="keyword">delete</span> _M_ptr;
<a name="l00245"></a>00245 _M_ptr = __p;
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248 <span class="comment"></span>
<a name="l00249"></a>00249 <span class="comment"> /** </span>
<a name="l00250"></a>00250 <span class="comment"> * @brief Automatic conversions</span>
<a name="l00251"></a>00251 <span class="comment"> *</span>
<a name="l00252"></a>00252 <span class="comment"> * These operations convert an %auto_ptr into and from an auto_ptr_ref</span>
<a name="l00253"></a>00253 <span class="comment"> * automatically as needed. This allows constructs such as</span>
<a name="l00254"></a>00254 <span class="comment"> * @code</span>
<a name="l00255"></a>00255 <span class="comment"> * auto_ptr<Derived> func_returning_auto_ptr(.....);</span>
<a name="l00256"></a>00256 <span class="comment"> * ...</span>
<a name="l00257"></a>00257 <span class="comment"> * auto_ptr<Base> ptr = func_returning_auto_ptr(.....);</span>
<a name="l00258"></a>00258 <span class="comment"> * @endcode</span>
<a name="l00259"></a>00259 <span class="comment"> */</span>
<a name="l00260"></a><a class="code" href="a00386.html#a829d06b1a12a622608a3cce322238fc6">00260</a> <a class="code" href="a00386.html#a4029546a38036de379586d8514a02ebb" title="An auto_ptr is usually constructed from a raw pointer.">auto_ptr</a>(<a class="code" href="a00387.html">auto_ptr_ref<element_type></a> __ref) <span class="keywordflow">throw</span>()
<a name="l00261"></a>00261 : _M_ptr(__ref._M_ptr) { }
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <a class="code" href="a00386.html" title="A simple smart pointer providing strict ownership semantics.">auto_ptr</a>&
<a name="l00264"></a>00264 <a class="code" href="a00386.html#af798a3136d8030f2158837fde7373f5b" title="auto_ptr assignment operator.">operator=</a>(<a class="code" href="a00387.html">auto_ptr_ref<element_type></a> __ref) <span class="keywordflow">throw</span>()
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266 <span class="keywordflow">if</span> (__ref._M_ptr != this->get())
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 <span class="keyword">delete</span> _M_ptr;
<a name="l00269"></a>00269 _M_ptr = __ref._M_ptr;
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1>
<a name="l00275"></a>00275 operator auto_ptr_ref<_Tp1>() throw()
<a name="l00276"></a>00276 { <span class="keywordflow">return</span> auto_ptr_ref<_Tp1>(this-><a class="code" href="a00386.html#a3cdeabd85acfcac56136924e939c29ef" title="Bypassing the smart pointer.">release</a>()); }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keyword">template</span><<span class="keyword">typename</span> _Tp1>
<a name="l00279"></a>00279 operator auto_ptr<_Tp1>() throw()
<a name="l00280"></a>00280 { <span class="keywordflow">return</span> auto_ptr<_Tp1>(this-><a class="code" href="a00386.html#a3cdeabd85acfcac56136924e939c29ef" title="Bypassing the smart pointer.">release</a>()); }
<a name="l00281"></a>00281 } _GLIBCXX_DEPRECATED;
<a name="l00282"></a>00282
<a name="l00283"></a>00283 <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span>
<a name="l00284"></a>00284 <span class="comment">// 541. shared_ptr template assignment and void</span>
<a name="l00285"></a>00285 <span class="keyword">template</span><>
<a name="l00286"></a>00286 <span class="keyword">class </span>auto_ptr<void>
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 <span class="keyword">public</span>:
<a name="l00289"></a>00289 <span class="keyword">typedef</span> <span class="keywordtype">void</span> <a class="code" href="a00386.html#a7c925143715c359436b453e524dd9fc1" title="The pointed-to type.">element_type</a>;
<a name="l00290"></a>00290 } _GLIBCXX_DEPRECATED;
<a name="l00291"></a>00291
<a name="l00292"></a>00292 _GLIBCXX_END_NAMESPACE_VERSION
<a name="l00293"></a>00293 } <span class="comment">// namespace</span>
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <span class="preprocessor">#endif </span><span class="comment">/* _BACKWARD_AUTO_PTR_H */</span>
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