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<div class="headertitle"><div class="title">cxx::Ref_ptr< T, CNT > Class Template Reference</div></div>
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<p>A reference-counting pointer with automatic cleanup.
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<a href="#details">More...</a></p>
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<p><code>#include <<a class="el" href="ref__ptr_source.html">ref_ptr</a>></code></p>
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<div id="dynsection-0" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Inheritance diagram for cxx::Ref_ptr< T, CNT >:</div>
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<div id="dynsection-1" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Collaboration diagram for cxx::Ref_ptr< T, CNT >:</div>
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</div>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-pub-methods" class="groupheader"><a id="pub-methods" name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:a280dca0436eaad5de0092a236494a15c" id="r_a280dca0436eaad5de0092a236494a15c"><td class="memItemLeft" align="right" valign="top"><a id="a280dca0436eaad5de0092a236494a15c" name="a280dca0436eaad5de0092a236494a15c"></a>
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 </td><td class="memItemRight" valign="bottom"><b>Ref_ptr</b> () noexcept</td></tr>
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<tr class="memdesc:a280dca0436eaad5de0092a236494a15c"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor creates a pointer with no managed object. <br /></td></tr>
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<tr class="memitem:a16711207b2550ca3a641900858ee8e4d" id="r_a16711207b2550ca3a641900858ee8e4d"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#a16711207b2550ca3a641900858ee8e4d">Ref_ptr</a> (Wp const &o) noexcept</td></tr>
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<tr class="memdesc:a16711207b2550ca3a641900858ee8e4d"><td class="mdescLeft"> </td><td class="mdescRight">Create a shared pointer from a weak pointer. <br /></td></tr>
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<tr class="memitem:a7bd176814bb3b4ae53e11d03e1a1e56b" id="r_a7bd176814bb3b4ae53e11d03e1a1e56b"><td class="memItemLeft" align="right" valign="top"><a id="a7bd176814bb3b4ae53e11d03e1a1e56b" name="a7bd176814bb3b4ae53e11d03e1a1e56b"></a>
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 </td><td class="memItemRight" valign="bottom"><b>Ref_ptr</b> (decltype(nullptr) n) noexcept</td></tr>
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<tr class="memdesc:a7bd176814bb3b4ae53e11d03e1a1e56b"><td class="mdescLeft"> </td><td class="mdescRight">allow creation from <span class="tt">nullptr</span> <br /></td></tr>
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<tr class="memitem:ad934d1379773e110d473dd93aa37bb16" id="r_ad934d1379773e110d473dd93aa37bb16"><td class="memTemplParams" colspan="2">template<typename X> </td></tr>
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<tr class="memitem:ad934d1379773e110d473dd93aa37bb16 template"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#ad934d1379773e110d473dd93aa37bb16">Ref_ptr</a> (X *o) noexcept</td></tr>
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<tr class="memdesc:ad934d1379773e110d473dd93aa37bb16"><td class="mdescLeft"> </td><td class="mdescRight">Create a shared pointer from a raw pointer. <br /></td></tr>
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<tr class="memitem:adc965ce5cdc186af4beb20bec81b2053" id="r_adc965ce5cdc186af4beb20bec81b2053"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#adc965ce5cdc186af4beb20bec81b2053">Ref_ptr</a> (T *o, bool d) noexcept</td></tr>
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<tr class="memdesc:adc965ce5cdc186af4beb20bec81b2053"><td class="mdescLeft"> </td><td class="mdescRight">Create a shared pointer from a raw pointer without creating a new reference. <br /></td></tr>
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<tr class="memitem:a7eabdb60cfa0590ce712c65ba1fa9663" id="r_a7eabdb60cfa0590ce712c65ba1fa9663"><td class="memItemLeft" align="right" valign="top">T * </td><td class="memItemRight" valign="bottom"><a class="el" href="#a7eabdb60cfa0590ce712c65ba1fa9663">get</a> () const noexcept</td></tr>
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<tr class="memdesc:a7eabdb60cfa0590ce712c65ba1fa9663"><td class="mdescLeft"> </td><td class="mdescRight">Return a raw pointer to the object this shared pointer points to. <br /></td></tr>
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<tr class="memitem:ae2bc2164ce036f10ea4857820f899558" id="r_ae2bc2164ce036f10ea4857820f899558"><td class="memItemLeft" align="right" valign="top">T * </td><td class="memItemRight" valign="bottom"><a class="el" href="#ae2bc2164ce036f10ea4857820f899558">ptr</a> () const noexcept</td></tr>
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<tr class="memdesc:ae2bc2164ce036f10ea4857820f899558"><td class="mdescLeft"> </td><td class="mdescRight">Return a raw pointer to the object this shared pointer points to. <br /></td></tr>
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<tr class="memitem:acda4d0e971299687bd4b6345d597647f" id="r_acda4d0e971299687bd4b6345d597647f"><td class="memItemLeft" align="right" valign="top">T * </td><td class="memItemRight" valign="bottom"><a class="el" href="#acda4d0e971299687bd4b6345d597647f">release</a> () noexcept</td></tr>
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<tr class="memdesc:acda4d0e971299687bd4b6345d597647f"><td class="mdescLeft"> </td><td class="mdescRight">Release the shared pointer without removing the reference. <br /></td></tr>
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</table>
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<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
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<div class="textblock"><div class="compoundTemplParams">template<typename T = void, template< typename X > class CNT = Default_ref_counter><br />
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class cxx::Ref_ptr< T, CNT ></div><p>A reference-counting pointer with automatic cleanup. </p>
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<dl class="tparams"><dt>Template Parameters</dt><dd>
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<table class="tparams">
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<tr><td class="paramname">T</td><td>Type of object the pointer points to. </td></tr>
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<tr><td class="paramname">CNT</td><td>Type of management class that manages the life time of the object.</td></tr>
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</table>
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</dd>
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</dl>
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<p>This pointer is similar to the standard C++-11 shared_ptr but it does the reference counting directly in the object being pointed to, so that no additional management structures need to be allocated from the heap.</p>
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<p>Classes that use this pointer type must implement two functions: </p><pre class="fragment">int remove_ref()
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</pre><p>is called when a reference is removed and must return 0 when there are no further references to the object. </p><pre class="fragment">void add_ref()
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</pre><p>is called when another ref_ptr to the object is created.</p>
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<p>Ref_obj provides a simple implementation of this interface from which classes may inherit. </p>
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<dl class="section examples"><dt>Examples</dt><dd><a class="el" href="tmpfs_2lib_2src_2fs_8cc-example.html#_a0">tmpfs/lib/src/fs.cc</a>.</dd>
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</dl>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00070">70</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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</div><a name="doc-constructors" id="doc-constructors"></a><h2 id="header-doc-constructors" class="groupheader">Constructor & Destructor Documentation</h2>
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<a id="a16711207b2550ca3a641900858ee8e4d" name="a16711207b2550ca3a641900858ee8e4d"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a16711207b2550ca3a641900858ee8e4d">◆ </a></span>Ref_ptr() <span class="overload">[1/3]</span></h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<td class="memname"><a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::Ref_ptr </td>
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<td>(</td>
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<td class="paramtype">Wp const &</td> <td class="paramname"><span class="paramname"><em>o</em></span></td><td>)</td>
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<td></td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Create a shared pointer from a weak pointer. </p>
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<p>Increases references. </p>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00088">88</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<a id="ad934d1379773e110d473dd93aa37bb16" name="ad934d1379773e110d473dd93aa37bb16"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ad934d1379773e110d473dd93aa37bb16">◆ </a></span>Ref_ptr() <span class="overload">[2/3]</span></h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<div class="memtemplate">
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template<typename X> </div>
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<td class="memname"><a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::Ref_ptr </td>
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<td>(</td>
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<td class="paramtype">X *</td> <td class="paramname"><span class="paramname"><em>o</em></span></td><td>)</td>
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<td></td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel explicit">explicit</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Create a shared pointer from a raw pointer. </p>
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<p>In contrast to C++11 shared_ptr it is safe to use this constructor multiple times and have the same reference counter. </p>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00101">101</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<a id="adc965ce5cdc186af4beb20bec81b2053" name="adc965ce5cdc186af4beb20bec81b2053"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#adc965ce5cdc186af4beb20bec81b2053">◆ </a></span>Ref_ptr() <span class="overload">[3/3]</span></h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<td class="memname"><a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::Ref_ptr </td>
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<td>(</td>
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<td class="paramtype">T *</td> <td class="paramname"><span class="paramname"><em>o</em></span>, </td>
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<td class="paramtype">bool</td> <td class="paramname"><span class="paramname"><em>d</em></span> )</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Create a shared pointer from a raw pointer without creating a new reference. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">o</td><td>Pointer to the object. </td></tr>
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<tr><td class="paramname">d</td><td>Dummy parameter to select this constructor at compile time. The value may be true or false.</td></tr>
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</table>
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</dd>
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<p>This is the counterpart to <a class="el" href="#acda4d0e971299687bd4b6345d597647f" title="Release the shared pointer without removing the reference.">release()</a>. </p>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00114">114</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Member Function Documentation</h2>
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<a id="a7eabdb60cfa0590ce712c65ba1fa9663" name="a7eabdb60cfa0590ce712c65ba1fa9663"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a7eabdb60cfa0590ce712c65ba1fa9663">◆ </a></span>get()</h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<td class="memname">T * <a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::get </td>
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<td>(</td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<td> const</td>
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<span class="mlabels"><span class="mlabel inline">inline</span><span class="mlabel noexcept">noexcept</span></span> </td>
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<p>Return a raw pointer to the object this shared pointer points to. </p>
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<p>This does not release the pointer or decrease the reference count. </p>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00121">121</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ae2bc2164ce036f10ea4857820f899558">◆ </a></span>ptr()</h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<td class="memname">T * <a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::ptr </td>
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<td>(</td>
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<td> const</td>
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<p>Return a raw pointer to the object this shared pointer points to. </p>
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<p>This does not release the pointer or decrease the reference count. </p>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00127">127</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#acda4d0e971299687bd4b6345d597647f">◆ </a></span>release()</h2>
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template<typename T = void, template< typename X > class CNT = Default_ref_counter> </div>
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<td class="memname">T * <a class="el" href="classcxx_1_1Ref__ptr.html">cxx::Ref_ptr</a>< T, CNT >::release </td>
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<p>Release the shared pointer without removing the reference. </p>
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<dl class="section return"><dt>Returns</dt><dd>A raw pointer to the managed object. </dd></dl>
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<p class="definition">Definition at line <a class="el" href="ref__ptr_source.html#l00138">138</a> of file <a class="el" href="ref__ptr_source.html">ref_ptr</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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<li>l4/cxx/<a class="el" href="ref__ptr_source.html">ref_ptr</a></li>
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