<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://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 1.8.13"/> <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"> $(document).ready(initResizable); </script> <link href="doxygen.css" 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<div class="headertitle"> <div class="title">std::weak_ptr< _Tp > Class Template Reference<div class="ingroups"><a class="el" href="a01431.html">Utilities</a> » <a class="el" href="a01424.html">Memory</a> » <a class="el" href="a01425.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:a0892650ef5c41f029549a94b86edc7e6"><td class="memItemLeft" align="right" valign="top"><a id="a0892650ef5c41f029549a94b86edc7e6"></a> typedef _Tp </td><td class="memItemRight" valign="bottom"><b>element_type</b></td></tr> <tr class="separator:a0892650ef5c41f029549a94b86edc7e6"><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:addf2a5c53b98e053a23d651021a615af"><td class="memTemplParams" colspan="2"><a id="addf2a5c53b98e053a23d651021a615af"></a> template<typename _Tp1 , typename = _Convertible<_Tp1*>> </td></tr> <tr class="memitem:addf2a5c53b98e053a23d651021a615af"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (const <a class="el" href="a06085.html">shared_ptr</a>< _Tp1 > &__r) noexcept</td></tr> <tr class="separator:addf2a5c53b98e053a23d651021a615af"><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="a06093.html">weak_ptr</a> &) noexcept=default</td></tr> <tr class="separator:a9ee936d80bdd00297d5afb0991159119"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a01bb0429005e3ff5872e190440018481"><td class="memTemplParams" colspan="2"><a id="a01bb0429005e3ff5872e190440018481"></a> template<typename _Tp1 , typename = _Convertible<_Tp1*>> </td></tr> <tr class="memitem:a01bb0429005e3ff5872e190440018481"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (const <a class="el" href="a06093.html">weak_ptr</a>< _Tp1 > &__r) noexcept</td></tr> <tr class="separator:a01bb0429005e3ff5872e190440018481"><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="a06093.html">weak_ptr</a> &&) noexcept=default</td></tr> <tr class="separator:a60e3d5c630b87436be6029a30b02337c"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a6a45ed8f72220ebcaace66d03510c1ad"><td class="memTemplParams" colspan="2"><a id="a6a45ed8f72220ebcaace66d03510c1ad"></a> template<typename _Tp1 , typename = _Convertible<_Tp1*>> </td></tr> <tr class="memitem:a6a45ed8f72220ebcaace66d03510c1ad"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>weak_ptr</b> (<a class="el" href="a06093.html">weak_ptr</a>< _Tp1 > &&__r) noexcept</td></tr> <tr class="separator:a6a45ed8f72220ebcaace66d03510c1ad"><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="a06085.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="a06093.html">weak_ptr</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06093.html">weak_ptr</a> &__r) noexcept=default</td></tr> <tr class="separator:a2c725c2802164cb6d763b6467c303c2d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a2ff352763d1e4e4088980a8ca2dddc38"><td class="memTemplParams" colspan="2"><a id="a2ff352763d1e4e4088980a8ca2dddc38"></a> template<typename _Tp1 > </td></tr> <tr class="memitem:a2ff352763d1e4e4088980a8ca2dddc38"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a06093.html">weak_ptr</a> & </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06093.html">weak_ptr</a>< _Tp1 > &__r) noexcept</td></tr> <tr class="separator:a2ff352763d1e4e4088980a8ca2dddc38"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a7862db077521bf854d9d660c02006d69"><td class="memTemplParams" colspan="2"><a id="a7862db077521bf854d9d660c02006d69"></a> template<typename _Tp1 > </td></tr> <tr class="memitem:a7862db077521bf854d9d660c02006d69"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a06093.html">weak_ptr</a> & </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a06085.html">shared_ptr</a>< _Tp1 > &__r) noexcept</td></tr> <tr class="separator:a7862db077521bf854d9d660c02006d69"><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="a06093.html">weak_ptr</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="a06093.html">weak_ptr</a> &&__r) noexcept=default</td></tr> <tr class="separator:aa35110a00525be617992b9bd5fc13129"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a034f9047cfba8107fc4f2a10cc052f58"><td class="memTemplParams" colspan="2"><a id="a034f9047cfba8107fc4f2a10cc052f58"></a> template<typename _Tp1 > </td></tr> <tr class="memitem:a034f9047cfba8107fc4f2a10cc052f58"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="a06093.html">weak_ptr</a> & </td><td class="memTemplItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="a06093.html">weak_ptr</a>< _Tp1 > &&__r) noexcept</td></tr> <tr class="separator:a034f9047cfba8107fc4f2a10cc052f58"><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="a00467_source.html#l00470">470</a> of file <a class="el" href="a00467_source.html">shared_ptr.h</a>.</p> </div><hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="a00467_source.html">shared_ptr.h</a></li> </ul> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for 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