75 lines
4.9 KiB
HTML
75 lines
4.9 KiB
HTML
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<title>std::experimental::observer_ptr<W>::operator*, std::experimental::observer_ptr<W>::operator-></title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_observer_ptr_operator skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::experimental::observer_ptr<W>::</span>operator*, <span style="font-size:0.7em; line-height:130%">std::experimental::observer_ptr<W>::</span>operator-></h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a>‎ | <a href="cpp-experimental-observer_ptr.html">observer ptr</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> <a href="cpp-types-add_reference.html"><span class="kw609">std::<span class="me2">add_lvalue_reference_t</span></span></a><span class="sy1"><</span>element_type<span class="sy1">></span> operator<span class="sy2">*</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(库基础 TS v2)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> element_type<span class="sy2">*</span> operator<span class="sy2">-</span><span class="sy1">></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>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(库基础 TS v2)</span></td>
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<td></td>
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<p><code>operator*</code> 和 <code>operator-></code> 提供对 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 所查看对象的访问。</p>
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<p>若 <span class="t-c"><span class="mw-geshi cpp source-cpp">get<span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> nullptr</span></span> 则 <code>operator*</code> 的行为未定义。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>1) 返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 所查看的对象，等价于 <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>
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<p>2) 返回指向 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 所查看对象的指针，等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">get<span class="br0">(</span><span class="br0">)</span></span></span> 。</p>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<p>1) 不抛异常。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div class="t-dsc-member-div">
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<div><a href="cpp-experimental-observer_ptr-get.html"><span class="t-lines"><span>get</span></span></a></div>
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</div>
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</td>
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<td>返回指向被查看对象的指针<br />
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<span class="t-mark">(公开成员函数)</span></td>
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