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<title>&#26631;&#20934;&#24211;&#22836;&#25991;&#20214; &lt;any&gt;</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;any&gt;</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-header.html">header</a></span></div>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-utility.html">&#36890;&#29992;&#24037;&#20855;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
<table class="t-dsc-begin">
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<td colspan="2">
<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-utility-any.html"><span class="t-lines"><span>any</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#21487;&#20445;&#26377;&#20219;&#20309;<a href="cpp-named_req-CopyConstructible.html"><span style="font-style:italic">&#21487;&#22797;&#21046;&#26500;&#36896;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(CopyConstructible)</span></a> &#31867;&#22411;&#30340;&#23454;&#20363;&#30340;&#23545;&#35937;&#12290;<br />
<span class="t-mark">(&#31867;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-utility-any-bad_any_cast.html"><span class="t-lines"><span>bad_any_cast</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#24403;&#31867;&#22411;&#19981;&#21305;&#37197;&#26102;&#25353;&#20540;&#36820;&#22238;&#24418;&#24335;&#30340; <code>any_cast</code> &#25152;&#25243;&#20986;&#30340;&#24322;&#24120;<br />
<span class="t-mark">(&#31867;)</span></td>
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<td colspan="2">
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
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<div><a href="cpp-utility-any-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::any)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-utility-any-make_any.html"><span class="t-lines"><span>make_any</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#21019;&#24314; <code>any</code> &#23545;&#35937;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-utility-any-any_cast.html"><span class="t-lines"><span>any_cast</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#23545;&#34987;&#23481;&#32435;&#23545;&#35937;&#30340;&#31867;&#22411;&#23433;&#20840;&#35775;&#38382;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="co1">// &#31867; bad_any_cast</span>
<span class="kw1">class</span> bad_any_cast<span class="sy4">;</span>
<span class="co1">// &#31867; any</span>
<span class="kw1">class</span> any<span class="sy4">;</span>
<span class="co1">// &#38750;&#25104;&#21592;&#20989;&#25968;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>any<span class="sy3">&amp;</span> x, any<span class="sy3">&amp;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
any make_any<span class="br0">(</span>Args<span class="sy3">&amp;&amp;</span>... <span class="me1">args</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> U, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
any make_any<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>U<span class="sy1">&gt;</span> il, Args<span class="sy3">&amp;&amp;</span>... <span class="me1">args</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
T any_cast<span class="br0">(</span><span class="kw4">const</span> any<span class="sy3">&amp;</span> operand<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
T any_cast<span class="br0">(</span>any<span class="sy3">&amp;</span> operand<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
T any_cast<span class="br0">(</span>any<span class="sy3">&amp;&amp;</span> operand<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
<span class="kw4">const</span> T<span class="sy2">*</span> any_cast<span class="br0">(</span><span class="kw4">const</span> any<span class="sy2">*</span> operand<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
T<span class="sy2">*</span> any_cast<span class="br0">(</span>any<span class="sy2">*</span> operand<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::bad_any_cast">&#31867; <span class="t-lc"><a href="cpp-utility-any-bad_any_cast.html">std::bad_any_cast</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">class</span> bad_any_cast <span class="sy4">:</span> <span class="kw1">public</span> bad_cast <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="co1">// &#29305;&#27530;&#25104;&#21592;&#20989;&#25968;&#30340;&#35268;&#33539;&#35265; [exception]</span>
<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> what<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> override<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::any">&#31867; <span class="t-lc"><a href="cpp-utility-any.html">std::any</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">class</span> any <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="co1">// &#26500;&#36896;&#19982;&#26512;&#26500;</span>
<span class="kw4">constexpr</span> any<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
any<span class="br0">(</span><span class="kw4">const</span> any<span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span>
any<span class="br0">(</span>any<span class="sy3">&amp;&amp;</span> other<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
any<span class="br0">(</span>T<span class="sy3">&amp;&amp;</span> value<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
<span class="kw1">explicit</span> any<span class="br0">(</span>in_place_type_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span>, Args<span class="sy3">&amp;&amp;</span>...<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> U, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
<span class="kw1">explicit</span> any<span class="br0">(</span>in_place_type_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span>, initializer_list<span class="sy1">&lt;</span>U<span class="sy1">&gt;</span>, Args<span class="sy3">&amp;&amp;</span>...<span class="br0">)</span><span class="sy4">;</span>
~any<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;</span>
any<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> any<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
any<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>any<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span>
any<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>T<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20462;&#25913;&#22120;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
decay_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> emplace<span class="br0">(</span>Args<span class="sy3">&amp;&amp;</span>...<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T, <span class="kw1">class</span> U, <span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span>
decay_t<span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> emplace<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>U<span class="sy1">&gt;</span>, Args<span class="sy3">&amp;&amp;</span>...<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> reset<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>any<span class="sy3">&amp;</span> rhs<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#35266;&#23519;&#22120;</span>
<span class="kw4">bool</span> has_value<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">const</span> type_info<span class="sy3">&amp;</span> type<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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