<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.15"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: std::weak_ptr< _Tp > Class Template Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> /* @license 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$(document).ready(function(){initNavTree('a06856.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="summary"> <a href="#pub-types">Public Types</a> | <a href="#pub-methods">Public Member Functions</a> | <a href="a06853.html">List of all members</a> </div> <div class="headertitle"> <div class="title">std::weak_ptr< _Tp > Class Template Reference<div class="ingroups"><a class="el" href="a01477.html">Utilities</a> » <a class="el" href="a01471.html">Memory</a> » <a class="el" href="a01472.html">Pointer Abstractions</a></div></div> </div> </div><!--header--> <div class="contents"> <p>Inherits std::__weak_ptr< _Tp, _Lp >.</p> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a> Public Types</h2></td></tr> <tr class="memitem:a6e9f50a1586da893bd85398d76cbfea2"><td class="memItemLeft" align="right" valign="top"><a id="a6e9f50a1586da893bd85398d76cbfea2"></a> using </td><td class="memItemRight" valign="bottom"><b>element_type</b> = typename <a class="el" href="a04080.html">remove_extent</a>< _Tp >::type</td></tr> <tr class="separator:a6e9f50a1586da893bd85398d76cbfea2"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a75f6260d5b3372d503cce85edbdab84b"><td class="memTemplParams" colspan="2"><a id="a75f6260d5b3372d503cce85edbdab84b"></a> template<typename _Yp , typename = _Constructible<const shared_ptr<_Yp>&>> </td></tr> <tr class="memitem:a75f6260d5b3372d503cce85edbdab84b"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (const <a class="el" href="a06848.html">shared_ptr</a>< _Yp > &__r) noexcept</td></tr> <tr class="separator:a75f6260d5b3372d503cce85edbdab84b"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a9ee936d80bdd00297d5afb0991159119"><td class="memItemLeft" align="right" valign="top"><a id="a9ee936d80bdd00297d5afb0991159119"></a>  </td><td class="memItemRight" valign="bottom"><b>weak_ptr</b> (const <a class="el" href="a06856.html">weak_ptr</a> &) noexcept=default</td></tr> <tr class="separator:a9ee936d80bdd00297d5afb0991159119"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a4cc414637fc8691cd1b663d583846b69"><td class="memTemplParams" colspan="2"><a id="a4cc414637fc8691cd1b663d583846b69"></a> template<typename _Yp , typename = _Constructible<const weak_ptr<_Yp>&>> </td></tr> <tr class="memitem:a4cc414637fc8691cd1b663d583846b69"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (const <a class="el" href="a06856.html">weak_ptr</a>< _Yp > &__r) noexcept</td></tr> <tr class="separator:a4cc414637fc8691cd1b663d583846b69"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a60e3d5c630b87436be6029a30b02337c"><td class="memItemLeft" align="right" valign="top"><a id="a60e3d5c630b87436be6029a30b02337c"></a>  </td><td class="memItemRight" valign="bottom"><b>weak_ptr</b> (<a class="el" href="a06856.html">weak_ptr</a> &&) noexcept=default</td></tr> <tr class="separator:a60e3d5c630b87436be6029a30b02337c"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a26ffd79c17b5054cf3c2e479c8700cab"><td class="memTemplParams" colspan="2"><a id="a26ffd79c17b5054cf3c2e479c8700cab"></a> template<typename _Yp , typename = _Constructible<weak_ptr<_Yp>>> </td></tr> <tr class="memitem:a26ffd79c17b5054cf3c2e479c8700cab"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (<a class="el" href="a06856.html">weak_ptr</a>< _Yp > &&__r) noexcept</td></tr> <tr class="separator:a26ffd79c17b5054cf3c2e479c8700cab"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a1cf3f6f87d4fd9f81b2a0b4649bab6f1"><td class="memItemLeft" align="right" valign="top"><a id="a1cf3f6f87d4fd9f81b2a0b4649bab6f1"></a> bool </td><td class="memItemRight" valign="bottom"><b>expired</b> () const noexcept</td></tr> <tr class="separator:a1cf3f6f87d4fd9f81b2a0b4649bab6f1"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a53f2a155f828156f9d66601330d54271"><td class="memItemLeft" align="right" valign="top"><a id="a53f2a155f828156f9d66601330d54271"></a> <a class="el" href="a06848.html">shared_ptr</a>< _Tp > </td><td class="memItemRight" valign="bottom"><b>lock</b> () const noexcept</td></tr> <tr class="separator:a53f2a155f828156f9d66601330d54271"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a2c725c2802164cb6d763b6467c303c2d"><td class="memItemLeft" align="right" valign="top"><a id="a2c725c2802164cb6d763b6467c303c2d"></a> <a class="el" href="a06856.html">weak_ptr</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06856.html">weak_ptr</a> &__r) noexcept=default</td></tr> <tr class="separator:a2c725c2802164cb6d763b6467c303c2d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a419ff557b4f077c17fb77d61f3893e9d"><td class="memTemplParams" colspan="2"><a id="a419ff557b4f077c17fb77d61f3893e9d"></a> template<typename _Yp > </td></tr> <tr class="memitem:a419ff557b4f077c17fb77d61f3893e9d"><td class="memTemplItemLeft" align="right" valign="top">_Assignable< const <a class="el" href="a06856.html">weak_ptr</a>< _Yp > & > </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06856.html">weak_ptr</a>< _Yp > &__r) noexcept</td></tr> <tr class="separator:a419ff557b4f077c17fb77d61f3893e9d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a4fa1dc453e1249ff513214dd7dbf9768"><td class="memTemplParams" colspan="2"><a id="a4fa1dc453e1249ff513214dd7dbf9768"></a> template<typename _Yp > </td></tr> <tr class="memitem:a4fa1dc453e1249ff513214dd7dbf9768"><td class="memTemplItemLeft" align="right" valign="top">_Assignable< const <a class="el" href="a06848.html">shared_ptr</a>< _Yp > & > </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06848.html">shared_ptr</a>< _Yp > &__r) noexcept</td></tr> <tr class="separator:a4fa1dc453e1249ff513214dd7dbf9768"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aa35110a00525be617992b9bd5fc13129"><td class="memItemLeft" align="right" valign="top"><a id="aa35110a00525be617992b9bd5fc13129"></a> <a class="el" href="a06856.html">weak_ptr</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="a06856.html">weak_ptr</a> &&__r) noexcept=default</td></tr> <tr class="separator:aa35110a00525be617992b9bd5fc13129"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ad869cae90f3dd639d5c76364fe0863b8"><td class="memTemplParams" colspan="2"><a id="ad869cae90f3dd639d5c76364fe0863b8"></a> template<typename _Yp > </td></tr> <tr class="memitem:ad869cae90f3dd639d5c76364fe0863b8"><td class="memTemplItemLeft" align="right" valign="top">_Assignable< <a class="el" href="a06856.html">weak_ptr</a>< _Yp > > </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="a06856.html">weak_ptr</a>< _Yp > &&__r) noexcept</td></tr> <tr class="separator:ad869cae90f3dd639d5c76364fe0863b8"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a71b92f6e5c2b1dfd0cd17d671fa5b14d"><td class="memTemplParams" colspan="2"><a id="a71b92f6e5c2b1dfd0cd17d671fa5b14d"></a> template<typename _Tp1 > </td></tr> <tr class="memitem:a71b92f6e5c2b1dfd0cd17d671fa5b14d"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><b>owner_before</b> (const __shared_ptr< _Tp1, _Lp > &__rhs) const noexcept</td></tr> <tr class="separator:a71b92f6e5c2b1dfd0cd17d671fa5b14d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a57cf289e204411fe068cb4b132aad21d"><td class="memTemplParams" colspan="2"><a id="a57cf289e204411fe068cb4b132aad21d"></a> template<typename _Tp1 > </td></tr> <tr class="memitem:a57cf289e204411fe068cb4b132aad21d"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><b>owner_before</b> (const __weak_ptr< _Tp1, _Lp > &__rhs) const noexcept</td></tr> <tr class="separator:a57cf289e204411fe068cb4b132aad21d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aba38418b9c030d6aadaa18362aa09952"><td class="memItemLeft" align="right" valign="top"><a id="aba38418b9c030d6aadaa18362aa09952"></a> void </td><td class="memItemRight" valign="bottom"><b>reset</b> () noexcept</td></tr> <tr class="separator:aba38418b9c030d6aadaa18362aa09952"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:af8a40a1e0feeef68ba065d7bbf043098"><td class="memItemLeft" align="right" valign="top"><a id="af8a40a1e0feeef68ba065d7bbf043098"></a> void </td><td class="memItemRight" valign="bottom"><b>swap</b> (__weak_ptr &__s) noexcept</td></tr> <tr class="separator:af8a40a1e0feeef68ba065d7bbf043098"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a4011aaa356a78e619dc272389a9472c2"><td class="memItemLeft" align="right" valign="top"><a id="a4011aaa356a78e619dc272389a9472c2"></a> long </td><td class="memItemRight" valign="bottom"><b>use_count</b> () const noexcept</td></tr> <tr class="separator:a4011aaa356a78e619dc272389a9472c2"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><h3>template<typename _Tp><br /> class std::weak_ptr< _Tp ></h3> <p>A smart pointer with weak semantics. </p> <p>With forwarding constructors and assignment operators. </p> <p class="definition">Definition at line <a class="el" href="a17109_source.html#l00535">535</a> of file <a class="el" href="a17109_source.html">bits/shared_ptr.h</a>.</p> </div><hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="a17109_source.html">bits/shared_ptr.h</a></li> </ul> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="a01538.html">std</a></li><li class="navelem"><a class="el" href="a06856.html">weak_ptr</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.15 </li> </ul> </div> </body> </html>