klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
c6df6d16c8458fe43f1c7d18c2b6098b365641a0
hustoj/web/cppreference-zh/chmhelp/cpp-memory-shared_ptr-operator_2a.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

107 lines
6.9 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>std::shared_ptr&lt;T&gt;::operator*, std::shared_ptr&lt;T&gt;::operator-&gt;</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_shared_ptr_operator skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::shared_ptr&lt;T&gt;::</span>operator*, <span style="font-size:0.7em; line-height:130%">std::shared_ptr&lt;T&gt;::</span>operator-&gt;</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-memory.html">memory</a>&lrm; | <a href="cpp-memory-shared_ptr.html">shared ptr</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy3">&amp;</span> operator<span class="sy2">*</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(1)</td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi cpp source-cpp">T<span class="sy2">*</span> operator<span class="sy2">-</span><span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(2)</td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#35299;&#24341;&#29992;&#25152;&#23384;&#20648;&#30340;&#25351;&#38024;&#12290;&#33509;&#23384;&#20648;&#30340;&#25351;&#38024;&#20026;&#31354;&#65292;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>1) &#35299;&#24341;&#29992;&#23384;&#20648;&#30340;&#25351;&#38024;&#25152;&#24471;&#30340;&#32467;&#26524;&#65292;&#21363; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>get<span class="br0">(</span><span class="br0">)</span></span></span></p>
<p>2) &#23384;&#20648;&#30340;&#25351;&#38024;&#65292;&#21363; <span class="t-c"><span class="mw-geshi cpp source-cpp">get<span class="br0">(</span><span class="br0">)</span></span></span></p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p><code>T</code> &#26159;&#65288;&#21487;&#26377; cv &#38480;&#23450;&#30340;&#65289; void &#31867;&#22411;&#26102;&#65292;&#26159;&#21542;&#22768;&#26126;&#20989;&#25968; <span class="t-v">(1)</span> &#26159;&#26410;&#25351;&#23450;&#30340;&#12290;</p>
<table class="t-rev-begin">
<tr class="t-rev t-since-cxx17">
<td>
<p><code>T</code> &#26159;&#25968;&#32452;&#31867;&#22411;&#26102;&#65292;&#26159;&#21542;&#22768;&#26126;&#36825;&#20004;&#20010;&#20989;&#25968;&#26159;&#26410;&#25351;&#23450;&#30340;&#12290;</p>
</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
</table>
<p>&#20197;&#19978;&#24773;&#20917;&#19979;&#65292;&#33509;&#22768;&#26126;&#20989;&#25968;&#65292;&#21017;&#20854;&#36820;&#22238;&#31867;&#22411;&#26159;&#26410;&#25351;&#23450;&#30340;&#65292;&#20294;&#20445;&#35777;&#20989;&#25968;&#22768;&#26126;&#21512;&#27861;&#65292;&#20989;&#25968;&#23450;&#20041;&#26410;&#24517;&#21512;&#27861;&#12290;&#36825;&#20351;&#24471; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-shared_ptr.html"><span class="kw734">std::<span class="me2">shared_ptr</span></span></a><span class="sy1">&lt;</span><span class="kw4">void</span><span class="sy1">&gt;</span></span></span> &#21487;&#20197;&#23454;&#20363;&#21270;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;memory&gt;</span>
<span class="kw1">struct</span> Foo
<span class="br0">{</span>
Foo<span class="br0">(</span><span class="kw4">int</span> in<span class="br0">)</span> <span class="sy4">:</span> a<span class="br0">(</span>in<span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw4">void</span> print<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;a = &quot;</span> <span class="sy1">&lt;&lt;</span> a <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> a<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">auto</span> ptr <span class="sy1">=</span> <a href="cpp-memory-shared_ptr-make_shared.html"><span class="kw736">std::<span class="me2">make_shared</span></span></a><span class="sy1">&lt;</span>Foo<span class="sy1">&gt;</span><span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
ptr<span class="sy2">-</span><span class="sy1">&gt;</span>print<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">(</span><span class="sy2">*</span>ptr<span class="br0">)</span>.<span class="me1">print</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">a = 10
a = 10</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-memory-shared_ptr-get.html"><span class="t-lines"><span>get</span></span></a></div>
</div>
</td>
<td>&#36820;&#22238;&#23384;&#20648;&#30340;&#25351;&#38024;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink