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<title>&#26631;&#20934;&#24211;&#22836;&#25991;&#20214; &lt;coroutine&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;coroutine&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-coroutine.html">&#21327;&#31243;&#25903;&#25345;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<td colspan="2">
<h3><span class="mw-headline" id=".E5.8C.85.E5.90.AB">&#21253;&#21547;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-header-compare.html"><span class="t-lines"><span>&lt;compare&gt;</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td><a href="cpp-language-operator_comparison.html#.E4.B8.89.E8.B7.AF.E6.AF.94.E8.BE.83">&#19977;&#36335;&#27604;&#36739;&#36816;&#31639;&#31526;</a>&#25903;&#25345;</td>
</tr>
<tr>
<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-coroutine-coroutine_traits.html"><span class="t-lines"><span>coroutine_traits</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#29992;&#20110;&#21457;&#29616;&#21327;&#31243;&#25215;&#35834;&#31867;&#22411;&#30340;&#29305;&#24449;&#31867;&#22411;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-coroutine_handle.html"><span class="t-lines"><span>coroutine_handle</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#29992;&#20110;&#25351;&#20195;&#26242;&#20572;&#25110;&#25191;&#34892;&#30340;&#21327;&#31243;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-coroutine_handle-hash.html"><span class="t-lines"><span>std::hash<span class="t-dsc-small">&lt;std::coroutine_handle&gt;</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td><span class="t-lc">std::coroutine_handle</span> &#30340;&#25955;&#21015;&#25903;&#25345;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;&#29305;&#21270;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.97.A0.E6.93.8D.E4.BD.9C.E5.8D.8F.E7.A8.8B">&#26080;&#25805;&#20316;&#21327;&#31243;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-noop_coroutine_promise.html"><span class="t-lines"><span>noop_coroutine_promise</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#29992;&#20110;&#26080;&#21487;&#35266;&#23519;&#20316;&#29992;&#30340;&#21327;&#31243;<br />
<span class="t-mark">(&#31867;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-coroutine_handle.html"><span class="t-lines"><span>noop_coroutine_handle</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">coroutine_handle</span><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">noop_coroutine_promise</span><span class="sy1">&gt;</span></span></span> &#65292;&#26377;&#24847;&#29992;&#20110;&#25351;&#20195;&#26080;&#25805;&#20316;&#21327;&#31243;<br />
<span class="t-mark">(typedef)</span></td>
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<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E5.B9.B3.E5.87.A1.E5.8F.AF.E7.AD.89.E5.BE.85.E4.BD.93">&#24179;&#20961;&#21487;&#31561;&#24453;&#20307;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-suspend_never.html"><span class="t-lines"><span>suspend_never</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#25351;&#31034; await &#34920;&#36798;&#24335;&#24212;&#35813;&#20915;&#19981;&#26242;&#20572;<br />
<span class="t-mark">(&#31867;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-suspend_always.html"><span class="t-lines"><span>suspend_always</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#25351;&#31034; await &#34920;&#36798;&#24335;&#24212;&#35813;&#22987;&#32456;&#26242;&#20572;<br />
<span class="t-mark">(&#31867;)</span></td>
</tr>
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-coroutine_handle-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator&lt;=&gt;</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#27604;&#36739;&#20108;&#20010; <code>coroutine_handle</code> &#23545;&#35937;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.97.A0.E6.93.8D.E4.BD.9C.E5.8D.8F.E7.A8.8B_2">&#26080;&#25805;&#20316;&#21327;&#31243;</span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-coroutine-noop_coroutine.html"><span class="t-lines"><span>noop_coroutine</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#21019;&#24314;&#22312;&#31561;&#24453;&#25110;&#38144;&#27585;&#26102;&#26080;&#21487;&#35266;&#23519;&#20316;&#29992;&#30340;&#21327;&#31243;&#26564;<br />
<span class="t-mark">(&#20989;&#25968;)</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="co2">#include &lt;compare&gt;</span>
<span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="co1">// &#21327;&#31243;&#34920;&#24449;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> R, <span class="kw1">class</span>... <span class="me1">ArgTypes</span><span class="sy1">&gt;</span>
<span class="kw1">struct</span> coroutine_traits<span class="sy4">;</span>
<span class="co1">// &#21327;&#31243;&#26564;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Promise <span class="sy1">=</span> <span class="kw4">void</span><span class="sy1">&gt;</span>
<span class="kw1">struct</span> coroutine_handle<span class="sy4">;</span>
<span class="co1">// &#27604;&#36739;&#36816;&#31639;&#31526;</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>coroutine_handle<span class="sy1">&lt;&gt;</span> x, coroutine_handle<span class="sy1">&lt;&gt;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> strong_ordering operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span>coroutine_handle<span class="sy1">&lt;&gt;</span> x, coroutine_handle<span class="sy1">&lt;&gt;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#25955;&#21015;&#25903;&#25345;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> T<span class="sy1">&gt;</span> <span class="kw1">struct</span> hash<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> P<span class="sy1">&gt;</span> <span class="kw1">struct</span> hash<span class="sy1">&lt;</span>coroutine_handle<span class="sy1">&lt;</span>P<span class="sy1">&gt;&gt;</span><span class="sy4">;</span>
<span class="co1">// &#26080;&#25805;&#20316;&#21327;&#31243;</span>
<span class="kw1">struct</span> noop_coroutine_promise<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;&gt;</span> <span class="kw1">struct</span> coroutine_handle<span class="sy1">&lt;</span>noop_coroutine_promise<span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> noop_coroutine_handle <span class="sy1">=</span> coroutine_handle<span class="sy1">&lt;</span>noop_coroutine_promise<span class="sy1">&gt;</span><span class="sy4">;</span>
noop_coroutine_handle noop_coroutine<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#24179;&#20961;&#21487;&#31561;&#24453;&#20307;</span>
<span class="kw1">struct</span> suspend_never<span class="sy4">;</span>
<span class="kw1">struct</span> suspend_always<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::coroutine_handle">&#31867;&#27169;&#26495; <span class="t-lc">std::coroutine_handle</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">template</span><span class="sy1">&lt;&gt;</span>
<span class="kw1">struct</span> coroutine_handle<span class="sy1">&lt;</span><span class="kw4">void</span><span class="sy1">&gt;</span>
<span class="br0">{</span>
<span class="co1">// &#26500;&#36896;/&#37325;&#32622;</span>
<span class="kw4">constexpr</span> coroutine_handle<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> coroutine_handle<span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
coroutine_handle<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#23548;&#20837;/&#23548;&#20986;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span><span class="sy2">*</span> address<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">static</span> <span class="kw4">constexpr</span> coroutine_handle from_address<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> addr<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#35266;&#23519;&#22120;</span>
<span class="kw4">constexpr</span> <span class="kw1">explicit</span> operator <span class="kw4">bool</span><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">bool</span> done<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="co1">// &#24674;&#22797;</span>
<span class="kw4">void</span> operator<span class="br0">(</span><span class="br0">)</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> destroy<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
<span class="kw4">void</span><span class="sy2">*</span> ptr<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Promise<span class="sy1">&gt;</span>
<span class="kw1">struct</span> coroutine_handle
<span class="br0">{</span>
<span class="co1">// &#26500;&#36896;/&#37325;&#32622;</span>
<span class="kw4">constexpr</span> coroutine_handle<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">constexpr</span> coroutine_handle<span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw4">static</span> coroutine_handle from_promise<span class="br0">(</span>Promise<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
coroutine_handle<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>nullptr_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#23548;&#20986;/&#23548;&#20837;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span><span class="sy2">*</span> address<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">static</span> <span class="kw4">constexpr</span> coroutine_handle from_address<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> addr<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36716;&#25442;</span>
<span class="kw4">constexpr</span> operator coroutine_handle<span class="sy1">&lt;&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 class="co1">// &#35266;&#23519;&#22120;</span>
<span class="kw4">constexpr</span> <span class="kw1">explicit</span> operator <span class="kw4">bool</span><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">bool</span> done<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="co1">// &#24674;&#22797;</span>
<span class="kw4">void</span> operator<span class="br0">(</span><span class="br0">)</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> destroy<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="co1">// &#25215;&#35834;&#35775;&#38382;</span>
Promise<span class="sy3">&amp;</span> promise<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
<span class="kw4">void</span><span class="sy2">*</span> ptr<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</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::noop_coroutine_promise">&#31867; <span class="t-lc">std::noop_coroutine_promise</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">struct</span> noop_coroutine_promise <span class="br0">{</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::coroutine_handle.3Cstd::noop_coroutine_promise.3E">&#31867; <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">coroutine_handle</span><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">noop_coroutine_promise</span><span class="sy1">&gt;</span></span></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">template</span><span class="sy1">&lt;&gt;</span>
<span class="kw1">struct</span> coroutine_handle<span class="sy1">&lt;</span>noop_coroutine_promise<span class="sy1">&gt;</span>
<span class="br0">{</span>
<span class="co1">// &#36716;&#25442;</span>
<span class="kw4">constexpr</span> operator coroutine_handle<span class="sy1">&lt;&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 class="co1">// &#35266;&#23519;&#22120;</span>
<span class="kw4">constexpr</span> <span class="kw1">explicit</span> operator <span class="kw4">bool</span><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">constexpr</span> <span class="kw4">bool</span> done<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#24674;&#22797;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> operator<span class="br0">(</span><span class="br0">)</span><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">constexpr</span> <span class="kw4">void</span> resume<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">constexpr</span> <span class="kw4">void</span> destroy<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#25215;&#35834;&#35775;&#38382;</span>
noop_coroutine_promise<span class="sy3">&amp;</span> promise<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#22320;&#22336;</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span><span class="sy2">*</span> address<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
coroutine_handle<span class="br0">(</span><span class="coMULTI">/* &#26410;&#25351;&#26126; */</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span><span class="sy2">*</span> ptr<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</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::suspend_never">&#31867; <span class="t-lc">std::suspend_never</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">struct</span> suspend_never <span class="br0">{</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> await_ready<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="kw2">true</span><span class="sy4">;</span> <span class="br0">}</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> await_suspend<span class="br0">(</span>coroutine_handle<span class="sy1">&lt;&gt;</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> await_resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span><span class="br0">}</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::suspend_always">&#31867; <span class="t-lc">std::suspend_always</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">struct</span> suspend_always <span class="br0">{</span>
<span class="kw4">constexpr</span> <span class="kw4">bool</span> await_ready<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="kw2">false</span><span class="sy4">;</span> <span class="br0">}</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> await_suspend<span class="br0">(</span>coroutine_handle<span class="sy1">&lt;&gt;</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span><span class="br0">}</span>
<span class="kw4">constexpr</span> <span class="kw4">void</span> await_resume<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span><span class="br0">}</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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