| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/tokio-377c595163f99a10/dfe252d/tokio/src/macros/select.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>select.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../tokio/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../tokio/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| <span id="139">139</span> |
| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
| <span id="143">143</span> |
| <span id="144">144</span> |
| <span id="145">145</span> |
| <span id="146">146</span> |
| <span id="147">147</span> |
| <span id="148">148</span> |
| <span id="149">149</span> |
| <span id="150">150</span> |
| <span id="151">151</span> |
| <span id="152">152</span> |
| <span id="153">153</span> |
| <span id="154">154</span> |
| <span id="155">155</span> |
| <span id="156">156</span> |
| <span id="157">157</span> |
| <span id="158">158</span> |
| <span id="159">159</span> |
| <span id="160">160</span> |
| <span id="161">161</span> |
| <span id="162">162</span> |
| <span id="163">163</span> |
| <span id="164">164</span> |
| <span id="165">165</span> |
| <span id="166">166</span> |
| <span id="167">167</span> |
| <span id="168">168</span> |
| <span id="169">169</span> |
| <span id="170">170</span> |
| <span id="171">171</span> |
| <span id="172">172</span> |
| <span id="173">173</span> |
| <span id="174">174</span> |
| <span id="175">175</span> |
| <span id="176">176</span> |
| <span id="177">177</span> |
| <span id="178">178</span> |
| <span id="179">179</span> |
| <span id="180">180</span> |
| <span id="181">181</span> |
| <span id="182">182</span> |
| <span id="183">183</span> |
| <span id="184">184</span> |
| <span id="185">185</span> |
| <span id="186">186</span> |
| <span id="187">187</span> |
| <span id="188">188</span> |
| <span id="189">189</span> |
| <span id="190">190</span> |
| <span id="191">191</span> |
| <span id="192">192</span> |
| <span id="193">193</span> |
| <span id="194">194</span> |
| <span id="195">195</span> |
| <span id="196">196</span> |
| <span id="197">197</span> |
| <span id="198">198</span> |
| <span id="199">199</span> |
| <span id="200">200</span> |
| <span id="201">201</span> |
| <span id="202">202</span> |
| <span id="203">203</span> |
| <span id="204">204</span> |
| <span id="205">205</span> |
| <span id="206">206</span> |
| <span id="207">207</span> |
| <span id="208">208</span> |
| <span id="209">209</span> |
| <span id="210">210</span> |
| <span id="211">211</span> |
| <span id="212">212</span> |
| <span id="213">213</span> |
| <span id="214">214</span> |
| <span id="215">215</span> |
| <span id="216">216</span> |
| <span id="217">217</span> |
| <span id="218">218</span> |
| <span id="219">219</span> |
| <span id="220">220</span> |
| <span id="221">221</span> |
| <span id="222">222</span> |
| <span id="223">223</span> |
| <span id="224">224</span> |
| <span id="225">225</span> |
| <span id="226">226</span> |
| <span id="227">227</span> |
| <span id="228">228</span> |
| <span id="229">229</span> |
| <span id="230">230</span> |
| <span id="231">231</span> |
| <span id="232">232</span> |
| <span id="233">233</span> |
| <span id="234">234</span> |
| <span id="235">235</span> |
| <span id="236">236</span> |
| <span id="237">237</span> |
| <span id="238">238</span> |
| <span id="239">239</span> |
| <span id="240">240</span> |
| <span id="241">241</span> |
| <span id="242">242</span> |
| <span id="243">243</span> |
| <span id="244">244</span> |
| <span id="245">245</span> |
| <span id="246">246</span> |
| <span id="247">247</span> |
| <span id="248">248</span> |
| <span id="249">249</span> |
| <span id="250">250</span> |
| <span id="251">251</span> |
| <span id="252">252</span> |
| <span id="253">253</span> |
| <span id="254">254</span> |
| <span id="255">255</span> |
| <span id="256">256</span> |
| <span id="257">257</span> |
| <span id="258">258</span> |
| <span id="259">259</span> |
| <span id="260">260</span> |
| <span id="261">261</span> |
| <span id="262">262</span> |
| <span id="263">263</span> |
| <span id="264">264</span> |
| <span id="265">265</span> |
| <span id="266">266</span> |
| <span id="267">267</span> |
| <span id="268">268</span> |
| <span id="269">269</span> |
| <span id="270">270</span> |
| <span id="271">271</span> |
| <span id="272">272</span> |
| <span id="273">273</span> |
| <span id="274">274</span> |
| <span id="275">275</span> |
| <span id="276">276</span> |
| <span id="277">277</span> |
| <span id="278">278</span> |
| <span id="279">279</span> |
| <span id="280">280</span> |
| <span id="281">281</span> |
| <span id="282">282</span> |
| <span id="283">283</span> |
| <span id="284">284</span> |
| <span id="285">285</span> |
| <span id="286">286</span> |
| <span id="287">287</span> |
| <span id="288">288</span> |
| <span id="289">289</span> |
| <span id="290">290</span> |
| <span id="291">291</span> |
| <span id="292">292</span> |
| <span id="293">293</span> |
| <span id="294">294</span> |
| <span id="295">295</span> |
| <span id="296">296</span> |
| <span id="297">297</span> |
| <span id="298">298</span> |
| <span id="299">299</span> |
| <span id="300">300</span> |
| <span id="301">301</span> |
| <span id="302">302</span> |
| <span id="303">303</span> |
| <span id="304">304</span> |
| <span id="305">305</span> |
| <span id="306">306</span> |
| <span id="307">307</span> |
| <span id="308">308</span> |
| <span id="309">309</span> |
| <span id="310">310</span> |
| <span id="311">311</span> |
| <span id="312">312</span> |
| <span id="313">313</span> |
| <span id="314">314</span> |
| <span id="315">315</span> |
| <span id="316">316</span> |
| <span id="317">317</span> |
| <span id="318">318</span> |
| <span id="319">319</span> |
| <span id="320">320</span> |
| <span id="321">321</span> |
| <span id="322">322</span> |
| <span id="323">323</span> |
| <span id="324">324</span> |
| <span id="325">325</span> |
| <span id="326">326</span> |
| <span id="327">327</span> |
| <span id="328">328</span> |
| <span id="329">329</span> |
| <span id="330">330</span> |
| <span id="331">331</span> |
| <span id="332">332</span> |
| <span id="333">333</span> |
| <span id="334">334</span> |
| <span id="335">335</span> |
| <span id="336">336</span> |
| <span id="337">337</span> |
| <span id="338">338</span> |
| <span id="339">339</span> |
| <span id="340">340</span> |
| <span id="341">341</span> |
| <span id="342">342</span> |
| <span id="343">343</span> |
| <span id="344">344</span> |
| <span id="345">345</span> |
| <span id="346">346</span> |
| <span id="347">347</span> |
| <span id="348">348</span> |
| <span id="349">349</span> |
| <span id="350">350</span> |
| <span id="351">351</span> |
| <span id="352">352</span> |
| <span id="353">353</span> |
| <span id="354">354</span> |
| <span id="355">355</span> |
| <span id="356">356</span> |
| <span id="357">357</span> |
| <span id="358">358</span> |
| <span id="359">359</span> |
| <span id="360">360</span> |
| <span id="361">361</span> |
| <span id="362">362</span> |
| <span id="363">363</span> |
| <span id="364">364</span> |
| <span id="365">365</span> |
| <span id="366">366</span> |
| <span id="367">367</span> |
| <span id="368">368</span> |
| <span id="369">369</span> |
| <span id="370">370</span> |
| <span id="371">371</span> |
| <span id="372">372</span> |
| <span id="373">373</span> |
| <span id="374">374</span> |
| <span id="375">375</span> |
| <span id="376">376</span> |
| <span id="377">377</span> |
| <span id="378">378</span> |
| <span id="379">379</span> |
| <span id="380">380</span> |
| <span id="381">381</span> |
| <span id="382">382</span> |
| <span id="383">383</span> |
| <span id="384">384</span> |
| <span id="385">385</span> |
| <span id="386">386</span> |
| <span id="387">387</span> |
| <span id="388">388</span> |
| <span id="389">389</span> |
| <span id="390">390</span> |
| <span id="391">391</span> |
| <span id="392">392</span> |
| <span id="393">393</span> |
| <span id="394">394</span> |
| <span id="395">395</span> |
| <span id="396">396</span> |
| <span id="397">397</span> |
| <span id="398">398</span> |
| <span id="399">399</span> |
| <span id="400">400</span> |
| <span id="401">401</span> |
| <span id="402">402</span> |
| <span id="403">403</span> |
| <span id="404">404</span> |
| <span id="405">405</span> |
| <span id="406">406</span> |
| <span id="407">407</span> |
| <span id="408">408</span> |
| <span id="409">409</span> |
| <span id="410">410</span> |
| <span id="411">411</span> |
| <span id="412">412</span> |
| <span id="413">413</span> |
| <span id="414">414</span> |
| <span id="415">415</span> |
| <span id="416">416</span> |
| <span id="417">417</span> |
| <span id="418">418</span> |
| <span id="419">419</span> |
| <span id="420">420</span> |
| <span id="421">421</span> |
| <span id="422">422</span> |
| <span id="423">423</span> |
| <span id="424">424</span> |
| <span id="425">425</span> |
| <span id="426">426</span> |
| <span id="427">427</span> |
| <span id="428">428</span> |
| <span id="429">429</span> |
| <span id="430">430</span> |
| <span id="431">431</span> |
| <span id="432">432</span> |
| <span id="433">433</span> |
| <span id="434">434</span> |
| <span id="435">435</span> |
| <span id="436">436</span> |
| <span id="437">437</span> |
| <span id="438">438</span> |
| <span id="439">439</span> |
| <span id="440">440</span> |
| <span id="441">441</span> |
| <span id="442">442</span> |
| <span id="443">443</span> |
| <span id="444">444</span> |
| <span id="445">445</span> |
| <span id="446">446</span> |
| <span id="447">447</span> |
| <span id="448">448</span> |
| <span id="449">449</span> |
| <span id="450">450</span> |
| <span id="451">451</span> |
| <span id="452">452</span> |
| <span id="453">453</span> |
| <span id="454">454</span> |
| <span id="455">455</span> |
| <span id="456">456</span> |
| <span id="457">457</span> |
| <span id="458">458</span> |
| <span id="459">459</span> |
| <span id="460">460</span> |
| <span id="461">461</span> |
| <span id="462">462</span> |
| <span id="463">463</span> |
| <span id="464">464</span> |
| <span id="465">465</span> |
| <span id="466">466</span> |
| <span id="467">467</span> |
| <span id="468">468</span> |
| <span id="469">469</span> |
| <span id="470">470</span> |
| <span id="471">471</span> |
| <span id="472">472</span> |
| <span id="473">473</span> |
| <span id="474">474</span> |
| <span id="475">475</span> |
| <span id="476">476</span> |
| <span id="477">477</span> |
| <span id="478">478</span> |
| <span id="479">479</span> |
| <span id="480">480</span> |
| <span id="481">481</span> |
| <span id="482">482</span> |
| <span id="483">483</span> |
| <span id="484">484</span> |
| <span id="485">485</span> |
| <span id="486">486</span> |
| <span id="487">487</span> |
| <span id="488">488</span> |
| <span id="489">489</span> |
| <span id="490">490</span> |
| <span id="491">491</span> |
| <span id="492">492</span> |
| <span id="493">493</span> |
| <span id="494">494</span> |
| <span id="495">495</span> |
| <span id="496">496</span> |
| <span id="497">497</span> |
| <span id="498">498</span> |
| <span id="499">499</span> |
| <span id="500">500</span> |
| <span id="501">501</span> |
| <span id="502">502</span> |
| <span id="503">503</span> |
| <span id="504">504</span> |
| <span id="505">505</span> |
| <span id="506">506</span> |
| <span id="507">507</span> |
| <span id="508">508</span> |
| <span id="509">509</span> |
| <span id="510">510</span> |
| <span id="511">511</span> |
| <span id="512">512</span> |
| <span id="513">513</span> |
| <span id="514">514</span> |
| <span id="515">515</span> |
| <span id="516">516</span> |
| <span id="517">517</span> |
| <span id="518">518</span> |
| <span id="519">519</span> |
| <span id="520">520</span> |
| <span id="521">521</span> |
| <span id="522">522</span> |
| <span id="523">523</span> |
| <span id="524">524</span> |
| <span id="525">525</span> |
| <span id="526">526</span> |
| <span id="527">527</span> |
| <span id="528">528</span> |
| <span id="529">529</span> |
| <span id="530">530</span> |
| <span id="531">531</span> |
| <span id="532">532</span> |
| <span id="533">533</span> |
| <span id="534">534</span> |
| <span id="535">535</span> |
| <span id="536">536</span> |
| <span id="537">537</span> |
| <span id="538">538</span> |
| <span id="539">539</span> |
| <span id="540">540</span> |
| <span id="541">541</span> |
| <span id="542">542</span> |
| <span id="543">543</span> |
| <span id="544">544</span> |
| <span id="545">545</span> |
| <span id="546">546</span> |
| <span id="547">547</span> |
| <span id="548">548</span> |
| <span id="549">549</span> |
| <span id="550">550</span> |
| <span id="551">551</span> |
| <span id="552">552</span> |
| <span id="553">553</span> |
| <span id="554">554</span> |
| <span id="555">555</span> |
| <span id="556">556</span> |
| <span id="557">557</span> |
| <span id="558">558</span> |
| <span id="559">559</span> |
| <span id="560">560</span> |
| <span id="561">561</span> |
| <span id="562">562</span> |
| <span id="563">563</span> |
| <span id="564">564</span> |
| <span id="565">565</span> |
| <span id="566">566</span> |
| <span id="567">567</span> |
| <span id="568">568</span> |
| <span id="569">569</span> |
| <span id="570">570</span> |
| <span id="571">571</span> |
| <span id="572">572</span> |
| <span id="573">573</span> |
| <span id="574">574</span> |
| <span id="575">575</span> |
| <span id="576">576</span> |
| <span id="577">577</span> |
| <span id="578">578</span> |
| <span id="579">579</span> |
| <span id="580">580</span> |
| <span id="581">581</span> |
| <span id="582">582</span> |
| <span id="583">583</span> |
| <span id="584">584</span> |
| <span id="585">585</span> |
| <span id="586">586</span> |
| <span id="587">587</span> |
| <span id="588">588</span> |
| <span id="589">589</span> |
| <span id="590">590</span> |
| <span id="591">591</span> |
| <span id="592">592</span> |
| <span id="593">593</span> |
| <span id="594">594</span> |
| <span id="595">595</span> |
| <span id="596">596</span> |
| <span id="597">597</span> |
| <span id="598">598</span> |
| <span id="599">599</span> |
| <span id="600">600</span> |
| <span id="601">601</span> |
| <span id="602">602</span> |
| <span id="603">603</span> |
| <span id="604">604</span> |
| <span id="605">605</span> |
| <span id="606">606</span> |
| <span id="607">607</span> |
| <span id="608">608</span> |
| <span id="609">609</span> |
| <span id="610">610</span> |
| <span id="611">611</span> |
| <span id="612">612</span> |
| <span id="613">613</span> |
| <span id="614">614</span> |
| <span id="615">615</span> |
| <span id="616">616</span> |
| <span id="617">617</span> |
| <span id="618">618</span> |
| <span id="619">619</span> |
| <span id="620">620</span> |
| <span id="621">621</span> |
| <span id="622">622</span> |
| <span id="623">623</span> |
| <span id="624">624</span> |
| <span id="625">625</span> |
| <span id="626">626</span> |
| <span id="627">627</span> |
| <span id="628">628</span> |
| <span id="629">629</span> |
| <span id="630">630</span> |
| <span id="631">631</span> |
| <span id="632">632</span> |
| <span id="633">633</span> |
| <span id="634">634</span> |
| <span id="635">635</span> |
| <span id="636">636</span> |
| <span id="637">637</span> |
| <span id="638">638</span> |
| <span id="639">639</span> |
| <span id="640">640</span> |
| <span id="641">641</span> |
| <span id="642">642</span> |
| <span id="643">643</span> |
| <span id="644">644</span> |
| <span id="645">645</span> |
| <span id="646">646</span> |
| <span id="647">647</span> |
| <span id="648">648</span> |
| <span id="649">649</span> |
| <span id="650">650</span> |
| <span id="651">651</span> |
| <span id="652">652</span> |
| <span id="653">653</span> |
| <span id="654">654</span> |
| <span id="655">655</span> |
| <span id="656">656</span> |
| <span id="657">657</span> |
| <span id="658">658</span> |
| <span id="659">659</span> |
| <span id="660">660</span> |
| <span id="661">661</span> |
| <span id="662">662</span> |
| <span id="663">663</span> |
| <span id="664">664</span> |
| <span id="665">665</span> |
| <span id="666">666</span> |
| <span id="667">667</span> |
| <span id="668">668</span> |
| <span id="669">669</span> |
| <span id="670">670</span> |
| <span id="671">671</span> |
| <span id="672">672</span> |
| <span id="673">673</span> |
| <span id="674">674</span> |
| <span id="675">675</span> |
| <span id="676">676</span> |
| <span id="677">677</span> |
| <span id="678">678</span> |
| <span id="679">679</span> |
| <span id="680">680</span> |
| <span id="681">681</span> |
| <span id="682">682</span> |
| <span id="683">683</span> |
| <span id="684">684</span> |
| <span id="685">685</span> |
| <span id="686">686</span> |
| <span id="687">687</span> |
| <span id="688">688</span> |
| <span id="689">689</span> |
| <span id="690">690</span> |
| <span id="691">691</span> |
| <span id="692">692</span> |
| <span id="693">693</span> |
| <span id="694">694</span> |
| <span id="695">695</span> |
| <span id="696">696</span> |
| <span id="697">697</span> |
| <span id="698">698</span> |
| <span id="699">699</span> |
| <span id="700">700</span> |
| <span id="701">701</span> |
| <span id="702">702</span> |
| <span id="703">703</span> |
| <span id="704">704</span> |
| <span id="705">705</span> |
| <span id="706">706</span> |
| <span id="707">707</span> |
| <span id="708">708</span> |
| <span id="709">709</span> |
| <span id="710">710</span> |
| <span id="711">711</span> |
| <span id="712">712</span> |
| <span id="713">713</span> |
| <span id="714">714</span> |
| <span id="715">715</span> |
| <span id="716">716</span> |
| <span id="717">717</span> |
| <span id="718">718</span> |
| <span id="719">719</span> |
| <span id="720">720</span> |
| <span id="721">721</span> |
| <span id="722">722</span> |
| <span id="723">723</span> |
| <span id="724">724</span> |
| <span id="725">725</span> |
| <span id="726">726</span> |
| <span id="727">727</span> |
| <span id="728">728</span> |
| <span id="729">729</span> |
| <span id="730">730</span> |
| <span id="731">731</span> |
| <span id="732">732</span> |
| <span id="733">733</span> |
| <span id="734">734</span> |
| <span id="735">735</span> |
| <span id="736">736</span> |
| <span id="737">737</span> |
| <span id="738">738</span> |
| <span id="739">739</span> |
| <span id="740">740</span> |
| <span id="741">741</span> |
| <span id="742">742</span> |
| <span id="743">743</span> |
| <span id="744">744</span> |
| <span id="745">745</span> |
| <span id="746">746</span> |
| <span id="747">747</span> |
| <span id="748">748</span> |
| <span id="749">749</span> |
| <span id="750">750</span> |
| <span id="751">751</span> |
| <span id="752">752</span> |
| <span id="753">753</span> |
| <span id="754">754</span> |
| <span id="755">755</span> |
| <span id="756">756</span> |
| <span id="757">757</span> |
| <span id="758">758</span> |
| <span id="759">759</span> |
| <span id="760">760</span> |
| <span id="761">761</span> |
| <span id="762">762</span> |
| <span id="763">763</span> |
| <span id="764">764</span> |
| <span id="765">765</span> |
| <span id="766">766</span> |
| <span id="767">767</span> |
| <span id="768">768</span> |
| <span id="769">769</span> |
| <span id="770">770</span> |
| <span id="771">771</span> |
| <span id="772">772</span> |
| <span id="773">773</span> |
| <span id="774">774</span> |
| <span id="775">775</span> |
| <span id="776">776</span> |
| <span id="777">777</span> |
| <span id="778">778</span> |
| <span id="779">779</span> |
| <span id="780">780</span> |
| <span id="781">781</span> |
| <span id="782">782</span> |
| <span id="783">783</span> |
| <span id="784">784</span> |
| <span id="785">785</span> |
| <span id="786">786</span> |
| <span id="787">787</span> |
| <span id="788">788</span> |
| <span id="789">789</span> |
| <span id="790">790</span> |
| <span id="791">791</span> |
| <span id="792">792</span> |
| <span id="793">793</span> |
| <span id="794">794</span> |
| <span id="795">795</span> |
| <span id="796">796</span> |
| <span id="797">797</span> |
| <span id="798">798</span> |
| <span id="799">799</span> |
| <span id="800">800</span> |
| <span id="801">801</span> |
| <span id="802">802</span> |
| <span id="803">803</span> |
| <span id="804">804</span> |
| <span id="805">805</span> |
| <span id="806">806</span> |
| <span id="807">807</span> |
| <span id="808">808</span> |
| <span id="809">809</span> |
| <span id="810">810</span> |
| <span id="811">811</span> |
| <span id="812">812</span> |
| <span id="813">813</span> |
| <span id="814">814</span> |
| <span id="815">815</span> |
| <span id="816">816</span> |
| <span id="817">817</span> |
| <span id="818">818</span> |
| <span id="819">819</span> |
| <span id="820">820</span> |
| <span id="821">821</span> |
| <span id="822">822</span> |
| <span id="823">823</span> |
| <span id="824">824</span> |
| <span id="825">825</span> |
| <span id="826">826</span> |
| <span id="827">827</span> |
| <span id="828">828</span> |
| <span id="829">829</span> |
| <span id="830">830</span> |
| <span id="831">831</span> |
| <span id="832">832</span> |
| <span id="833">833</span> |
| <span id="834">834</span> |
| <span id="835">835</span> |
| <span id="836">836</span> |
| <span id="837">837</span> |
| <span id="838">838</span> |
| <span id="839">839</span> |
| <span id="840">840</span> |
| <span id="841">841</span> |
| <span id="842">842</span> |
| <span id="843">843</span> |
| <span id="844">844</span> |
| <span id="845">845</span> |
| <span id="846">846</span> |
| <span id="847">847</span> |
| <span id="848">848</span> |
| <span id="849">849</span> |
| <span id="850">850</span> |
| <span id="851">851</span> |
| <span id="852">852</span> |
| <span id="853">853</span> |
| <span id="854">854</span> |
| <span id="855">855</span> |
| <span id="856">856</span> |
| <span id="857">857</span> |
| <span id="858">858</span> |
| <span id="859">859</span> |
| <span id="860">860</span> |
| <span id="861">861</span> |
| <span id="862">862</span> |
| <span id="863">863</span> |
| <span id="864">864</span> |
| <span id="865">865</span> |
| <span id="866">866</span> |
| <span id="867">867</span> |
| <span id="868">868</span> |
| <span id="869">869</span> |
| <span id="870">870</span> |
| <span id="871">871</span> |
| <span id="872">872</span> |
| <span id="873">873</span> |
| <span id="874">874</span> |
| <span id="875">875</span> |
| <span id="876">876</span> |
| <span id="877">877</span> |
| <span id="878">878</span> |
| <span id="879">879</span> |
| <span id="880">880</span> |
| <span id="881">881</span> |
| <span id="882">882</span> |
| <span id="883">883</span> |
| <span id="884">884</span> |
| <span id="885">885</span> |
| <span id="886">886</span> |
| <span id="887">887</span> |
| <span id="888">888</span> |
| <span id="889">889</span> |
| <span id="890">890</span> |
| <span id="891">891</span> |
| <span id="892">892</span> |
| <span id="893">893</span> |
| <span id="894">894</span> |
| <span id="895">895</span> |
| <span id="896">896</span> |
| <span id="897">897</span> |
| <span id="898">898</span> |
| <span id="899">899</span> |
| <span id="900">900</span> |
| <span id="901">901</span> |
| <span id="902">902</span> |
| <span id="903">903</span> |
| <span id="904">904</span> |
| <span id="905">905</span> |
| <span id="906">906</span> |
| <span id="907">907</span> |
| <span id="908">908</span> |
| <span id="909">909</span> |
| <span id="910">910</span> |
| <span id="911">911</span> |
| <span id="912">912</span> |
| <span id="913">913</span> |
| <span id="914">914</span> |
| <span id="915">915</span> |
| <span id="916">916</span> |
| <span id="917">917</span> |
| <span id="918">918</span> |
| <span id="919">919</span> |
| <span id="920">920</span> |
| <span id="921">921</span> |
| <span id="922">922</span> |
| <span id="923">923</span> |
| <span id="924">924</span> |
| <span id="925">925</span> |
| <span id="926">926</span> |
| <span id="927">927</span> |
| <span id="928">928</span> |
| <span id="929">929</span> |
| <span id="930">930</span> |
| <span id="931">931</span> |
| <span id="932">932</span> |
| <span id="933">933</span> |
| <span id="934">934</span> |
| <span id="935">935</span> |
| <span id="936">936</span> |
| <span id="937">937</span> |
| <span id="938">938</span> |
| <span id="939">939</span> |
| <span id="940">940</span> |
| <span id="941">941</span> |
| <span id="942">942</span> |
| <span id="943">943</span> |
| <span id="944">944</span> |
| <span id="945">945</span> |
| <span id="946">946</span> |
| <span id="947">947</span> |
| <span id="948">948</span> |
| <span id="949">949</span> |
| <span id="950">950</span> |
| <span id="951">951</span> |
| <span id="952">952</span> |
| <span id="953">953</span> |
| <span id="954">954</span> |
| <span id="955">955</span> |
| <span id="956">956</span> |
| <span id="957">957</span> |
| <span id="958">958</span> |
| <span id="959">959</span> |
| <span id="960">960</span> |
| <span id="961">961</span> |
| <span id="962">962</span> |
| <span id="963">963</span> |
| <span id="964">964</span> |
| <span id="965">965</span> |
| <span id="966">966</span> |
| <span id="967">967</span> |
| <span id="968">968</span> |
| <span id="969">969</span> |
| <span id="970">970</span> |
| <span id="971">971</span> |
| <span id="972">972</span> |
| <span id="973">973</span> |
| <span id="974">974</span> |
| <span id="975">975</span> |
| <span id="976">976</span> |
| <span id="977">977</span> |
| <span id="978">978</span> |
| <span id="979">979</span> |
| <span id="980">980</span> |
| <span id="981">981</span> |
| <span id="982">982</span> |
| <span id="983">983</span> |
| <span id="984">984</span> |
| <span id="985">985</span> |
| <span id="986">986</span> |
| <span id="987">987</span> |
| <span id="988">988</span> |
| <span id="989">989</span> |
| <span id="990">990</span> |
| <span id="991">991</span> |
| <span id="992">992</span> |
| <span id="993">993</span> |
| <span id="994">994</span> |
| <span id="995">995</span> |
| <span id="996">996</span> |
| <span id="997">997</span> |
| <span id="998">998</span> |
| <span id="999">999</span> |
| <span id="1000">1000</span> |
| <span id="1001">1001</span> |
| <span id="1002">1002</span> |
| <span id="1003">1003</span> |
| <span id="1004">1004</span> |
| <span id="1005">1005</span> |
| <span id="1006">1006</span> |
| <span id="1007">1007</span> |
| <span id="1008">1008</span> |
| <span id="1009">1009</span> |
| <span id="1010">1010</span> |
| <span id="1011">1011</span> |
| <span id="1012">1012</span> |
| <span id="1013">1013</span> |
| <span id="1014">1014</span> |
| <span id="1015">1015</span> |
| <span id="1016">1016</span> |
| </pre><pre class="rust"><code><span class="doccomment">/// Waits on multiple concurrent branches, returning when the **first** branch |
| /// completes, cancelling the remaining branches. |
| /// |
| /// The `select!` macro must be used inside of async functions, closures, and |
| /// blocks. |
| /// |
| /// The `select!` macro accepts one or more branches with the following pattern: |
| /// |
| /// ```text |
| /// <pattern> = <async expression> (, if <precondition>)? => <handler>, |
| /// ``` |
| /// |
| /// Additionally, the `select!` macro may include a single, optional `else` |
| /// branch, which evaluates if none of the other branches match their patterns: |
| /// |
| /// ```text |
| /// else => <expression> |
| /// ``` |
| /// |
| /// The macro aggregates all `<async expression>` expressions and runs them |
| /// concurrently on the **current** task. Once the **first** expression |
| /// completes with a value that matches its `<pattern>`, the `select!` macro |
| /// returns the result of evaluating the completed branch's `<handler>` |
| /// expression. |
| /// |
| /// Additionally, each branch may include an optional `if` precondition. If the |
| /// precondition returns `false`, then the branch is disabled. The provided |
| /// `<async expression>` is still evaluated but the resulting future is never |
| /// polled. This capability is useful when using `select!` within a loop. |
| /// |
| /// The complete lifecycle of a `select!` expression is as follows: |
| /// |
| /// 1. Evaluate all provided `<precondition>` expressions. If the precondition |
| /// returns `false`, disable the branch for the remainder of the current call |
| /// to `select!`. Re-entering `select!` due to a loop clears the "disabled" |
| /// state. |
| /// 2. Aggregate the `<async expression>`s from each branch, including the |
| /// disabled ones. If the branch is disabled, `<async expression>` is still |
| /// evaluated, but the resulting future is not polled. |
| /// 3. Concurrently await on the results for all remaining `<async expression>`s. |
| /// 4. Once an `<async expression>` returns a value, attempt to apply the value |
| /// to the provided `<pattern>`, if the pattern matches, evaluate `<handler>` |
| /// and return. If the pattern **does not** match, disable the current branch |
| /// and for the remainder of the current call to `select!`. Continue from step 3. |
| /// 5. If **all** branches are disabled, evaluate the `else` expression. If no |
| /// else branch is provided, panic. |
| /// |
| /// # Runtime characteristics |
| /// |
| /// By running all async expressions on the current task, the expressions are |
| /// able to run **concurrently** but not in **parallel**. This means all |
| /// expressions are run on the same thread and if one branch blocks the thread, |
| /// all other expressions will be unable to continue. If parallelism is |
| /// required, spawn each async expression using [`tokio::spawn`] and pass the |
| /// join handle to `select!`. |
| /// |
| /// [`tokio::spawn`]: crate::spawn |
| /// |
| /// # Fairness |
| /// |
| /// By default, `select!` randomly picks a branch to check first. This provides |
| /// some level of fairness when calling `select!` in a loop with branches that |
| /// are always ready. |
| /// |
| /// This behavior can be overridden by adding `biased;` to the beginning of the |
| /// macro usage. See the examples for details. This will cause `select` to poll |
| /// the futures in the order they appear from top to bottom. There are a few |
| /// reasons you may want this: |
| /// |
| /// - The random number generation of `tokio::select!` has a non-zero CPU cost |
| /// - Your futures may interact in a way where known polling order is significant |
| /// |
| /// But there is an important caveat to this mode. It becomes your responsibility |
| /// to ensure that the polling order of your futures is fair. If for example you |
| /// are selecting between a stream and a shutdown future, and the stream has a |
| /// huge volume of messages and zero or nearly zero time between them, you should |
| /// place the shutdown future earlier in the `select!` list to ensure that it is |
| /// always polled, and will not be ignored due to the stream being constantly |
| /// ready. |
| /// |
| /// # Panics |
| /// |
| /// The `select!` macro panics if all branches are disabled **and** there is no |
| /// provided `else` branch. A branch is disabled when the provided `if` |
| /// precondition returns `false` **or** when the pattern does not match the |
| /// result of `<async expression>`. |
| /// |
| /// # Cancellation safety |
| /// |
| /// When using `select!` in a loop to receive messages from multiple sources, |
| /// you should make sure that the receive call is cancellation safe to avoid |
| /// losing messages. This section goes through various common methods and |
| /// describes whether they are cancel safe. The lists in this section are not |
| /// exhaustive. |
| /// |
| /// The following methods are cancellation safe: |
| /// |
| /// * [`tokio::sync::mpsc::Receiver::recv`](crate::sync::mpsc::Receiver::recv) |
| /// * [`tokio::sync::mpsc::UnboundedReceiver::recv`](crate::sync::mpsc::UnboundedReceiver::recv) |
| /// * [`tokio::sync::broadcast::Receiver::recv`](crate::sync::broadcast::Receiver::recv) |
| /// * [`tokio::sync::watch::Receiver::changed`](crate::sync::watch::Receiver::changed) |
| /// * [`tokio::net::TcpListener::accept`](crate::net::TcpListener::accept) |
| /// * [`tokio::net::UnixListener::accept`](crate::net::UnixListener::accept) |
| /// * [`tokio::signal::unix::Signal::recv`](crate::signal::unix::Signal::recv) |
| /// * [`tokio::io::AsyncReadExt::read`](crate::io::AsyncReadExt::read) on any `AsyncRead` |
| /// * [`tokio::io::AsyncReadExt::read_buf`](crate::io::AsyncReadExt::read_buf) on any `AsyncRead` |
| /// * [`tokio::io::AsyncWriteExt::write`](crate::io::AsyncWriteExt::write) on any `AsyncWrite` |
| /// * [`tokio::io::AsyncWriteExt::write_buf`](crate::io::AsyncWriteExt::write_buf) on any `AsyncWrite` |
| /// * [`tokio_stream::StreamExt::next`](https://docs.rs/tokio-stream/0.1/tokio_stream/trait.StreamExt.html#method.next) on any `Stream` |
| /// * [`futures::stream::StreamExt::next`](https://docs.rs/futures/0.3/futures/stream/trait.StreamExt.html#method.next) on any `Stream` |
| /// |
| /// The following methods are not cancellation safe and can lead to loss of data: |
| /// |
| /// * [`tokio::io::AsyncReadExt::read_exact`](crate::io::AsyncReadExt::read_exact) |
| /// * [`tokio::io::AsyncReadExt::read_to_end`](crate::io::AsyncReadExt::read_to_end) |
| /// * [`tokio::io::AsyncReadExt::read_to_string`](crate::io::AsyncReadExt::read_to_string) |
| /// * [`tokio::io::AsyncWriteExt::write_all`](crate::io::AsyncWriteExt::write_all) |
| /// |
| /// The following methods are not cancellation safe because they use a queue for |
| /// fairness and cancellation makes you lose your place in the queue: |
| /// |
| /// * [`tokio::sync::Mutex::lock`](crate::sync::Mutex::lock) |
| /// * [`tokio::sync::RwLock::read`](crate::sync::RwLock::read) |
| /// * [`tokio::sync::RwLock::write`](crate::sync::RwLock::write) |
| /// * [`tokio::sync::Semaphore::acquire`](crate::sync::Semaphore::acquire) |
| /// * [`tokio::sync::Notify::notified`](crate::sync::Notify::notified) |
| /// |
| /// To determine whether your own methods are cancellation safe, look for the |
| /// location of uses of `.await`. This is because when an asynchronous method is |
| /// cancelled, that always happens at an `.await`. If your function behaves |
| /// correctly even if it is restarted while waiting at an `.await`, then it is |
| /// cancellation safe. |
| /// |
| /// Be aware that cancelling something that is not cancellation safe is not |
| /// necessarily wrong. For example, if you are cancelling a task because the |
| /// application is shutting down, then you probably don't care that partially |
| /// read data is lost. |
| /// |
| /// # Examples |
| /// |
| /// Basic select with two branches. |
| /// |
| /// ``` |
| /// async fn do_stuff_async() { |
| /// // async work |
| /// } |
| /// |
| /// async fn more_async_work() { |
| /// // more here |
| /// } |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// tokio::select! { |
| /// _ = do_stuff_async() => { |
| /// println!("do_stuff_async() completed first") |
| /// } |
| /// _ = more_async_work() => { |
| /// println!("more_async_work() completed first") |
| /// } |
| /// }; |
| /// } |
| /// ``` |
| /// |
| /// Basic stream selecting. |
| /// |
| /// ``` |
| /// use tokio_stream::{self as stream, StreamExt}; |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let mut stream1 = stream::iter(vec![1, 2, 3]); |
| /// let mut stream2 = stream::iter(vec![4, 5, 6]); |
| /// |
| /// let next = tokio::select! { |
| /// v = stream1.next() => v.unwrap(), |
| /// v = stream2.next() => v.unwrap(), |
| /// }; |
| /// |
| /// assert!(next == 1 || next == 4); |
| /// } |
| /// ``` |
| /// |
| /// Collect the contents of two streams. In this example, we rely on pattern |
| /// matching and the fact that `stream::iter` is "fused", i.e. once the stream |
| /// is complete, all calls to `next()` return `None`. |
| /// |
| /// ``` |
| /// use tokio_stream::{self as stream, StreamExt}; |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let mut stream1 = stream::iter(vec![1, 2, 3]); |
| /// let mut stream2 = stream::iter(vec![4, 5, 6]); |
| /// |
| /// let mut values = vec![]; |
| /// |
| /// loop { |
| /// tokio::select! { |
| /// Some(v) = stream1.next() => values.push(v), |
| /// Some(v) = stream2.next() => values.push(v), |
| /// else => break, |
| /// } |
| /// } |
| /// |
| /// values.sort(); |
| /// assert_eq!(&[1, 2, 3, 4, 5, 6], &values[..]); |
| /// } |
| /// ``` |
| /// |
| /// Using the same future in multiple `select!` expressions can be done by passing |
| /// a reference to the future. Doing so requires the future to be [`Unpin`]. A |
| /// future can be made [`Unpin`] by either using [`Box::pin`] or stack pinning. |
| /// |
| /// [`Unpin`]: std::marker::Unpin |
| /// [`Box::pin`]: std::boxed::Box::pin |
| /// |
| /// Here, a stream is consumed for at most 1 second. |
| /// |
| /// ``` |
| /// use tokio_stream::{self as stream, StreamExt}; |
| /// use tokio::time::{self, Duration}; |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let mut stream = stream::iter(vec![1, 2, 3]); |
| /// let sleep = time::sleep(Duration::from_secs(1)); |
| /// tokio::pin!(sleep); |
| /// |
| /// loop { |
| /// tokio::select! { |
| /// maybe_v = stream.next() => { |
| /// if let Some(v) = maybe_v { |
| /// println!("got = {}", v); |
| /// } else { |
| /// break; |
| /// } |
| /// } |
| /// _ = &mut sleep => { |
| /// println!("timeout"); |
| /// break; |
| /// } |
| /// } |
| /// } |
| /// } |
| /// ``` |
| /// |
| /// Joining two values using `select!`. |
| /// |
| /// ``` |
| /// use tokio::sync::oneshot; |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let (tx1, mut rx1) = oneshot::channel(); |
| /// let (tx2, mut rx2) = oneshot::channel(); |
| /// |
| /// tokio::spawn(async move { |
| /// tx1.send("first").unwrap(); |
| /// }); |
| /// |
| /// tokio::spawn(async move { |
| /// tx2.send("second").unwrap(); |
| /// }); |
| /// |
| /// let mut a = None; |
| /// let mut b = None; |
| /// |
| /// while a.is_none() || b.is_none() { |
| /// tokio::select! { |
| /// v1 = (&mut rx1), if a.is_none() => a = Some(v1.unwrap()), |
| /// v2 = (&mut rx2), if b.is_none() => b = Some(v2.unwrap()), |
| /// } |
| /// } |
| /// |
| /// let res = (a.unwrap(), b.unwrap()); |
| /// |
| /// assert_eq!(res.0, "first"); |
| /// assert_eq!(res.1, "second"); |
| /// } |
| /// ``` |
| /// |
| /// Using the `biased;` mode to control polling order. |
| /// |
| /// ``` |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let mut count = 0u8; |
| /// |
| /// loop { |
| /// tokio::select! { |
| /// // If you run this example without `biased;`, the polling order is |
| /// // pseudo-random, and the assertions on the value of count will |
| /// // (probably) fail. |
| /// biased; |
| /// |
| /// _ = async {}, if count < 1 => { |
| /// count += 1; |
| /// assert_eq!(count, 1); |
| /// } |
| /// _ = async {}, if count < 2 => { |
| /// count += 1; |
| /// assert_eq!(count, 2); |
| /// } |
| /// _ = async {}, if count < 3 => { |
| /// count += 1; |
| /// assert_eq!(count, 3); |
| /// } |
| /// _ = async {}, if count < 4 => { |
| /// count += 1; |
| /// assert_eq!(count, 4); |
| /// } |
| /// |
| /// else => { |
| /// break; |
| /// } |
| /// }; |
| /// } |
| /// } |
| /// ``` |
| /// |
| /// ## Avoid racy `if` preconditions |
| /// |
| /// Given that `if` preconditions are used to disable `select!` branches, some |
| /// caution must be used to avoid missing values. |
| /// |
| /// For example, here is **incorrect** usage of `sleep` with `if`. The objective |
| /// is to repeatedly run an asynchronous task for up to 50 milliseconds. |
| /// However, there is a potential for the `sleep` completion to be missed. |
| /// |
| /// ```no_run,should_panic |
| /// use tokio::time::{self, Duration}; |
| /// |
| /// async fn some_async_work() { |
| /// // do work |
| /// } |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let sleep = time::sleep(Duration::from_millis(50)); |
| /// tokio::pin!(sleep); |
| /// |
| /// while !sleep.is_elapsed() { |
| /// tokio::select! { |
| /// _ = &mut sleep, if !sleep.is_elapsed() => { |
| /// println!("operation timed out"); |
| /// } |
| /// _ = some_async_work() => { |
| /// println!("operation completed"); |
| /// } |
| /// } |
| /// } |
| /// |
| /// panic!("This example shows how not to do it!"); |
| /// } |
| /// ``` |
| /// |
| /// In the above example, `sleep.is_elapsed()` may return `true` even if |
| /// `sleep.poll()` never returned `Ready`. This opens up a potential race |
| /// condition where `sleep` expires between the `while !sleep.is_elapsed()` |
| /// check and the call to `select!` resulting in the `some_async_work()` call to |
| /// run uninterrupted despite the sleep having elapsed. |
| /// |
| /// One way to write the above example without the race would be: |
| /// |
| /// ``` |
| /// use tokio::time::{self, Duration}; |
| /// |
| /// async fn some_async_work() { |
| /// # time::sleep(Duration::from_millis(10)).await; |
| /// // do work |
| /// } |
| /// |
| /// #[tokio::main] |
| /// async fn main() { |
| /// let sleep = time::sleep(Duration::from_millis(50)); |
| /// tokio::pin!(sleep); |
| /// |
| /// loop { |
| /// tokio::select! { |
| /// _ = &mut sleep => { |
| /// println!("operation timed out"); |
| /// break; |
| /// } |
| /// _ = some_async_work() => { |
| /// println!("operation completed"); |
| /// } |
| /// } |
| /// } |
| /// } |
| /// ``` |
| </span><span class="attribute">#[macro_export] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"macros"</span>)))] |
| </span><span class="macro">macro_rules! </span>select { |
| <span class="comment">// Uses a declarative macro to do **most** of the work. While it is possible |
| // to implement fully with a declarative macro, a procedural macro is used |
| // to enable improved error messages. |
| // |
| // The macro is structured as a tt-muncher. All branches are processed and |
| // normalized. Once the input is normalized, it is passed to the top-most |
| // rule. When entering the macro, `@{ }` is inserted at the front. This is |
| // used to collect the normalized input. |
| // |
| // The macro only recurses once per branch. This allows using `select!` |
| // without requiring the user to increase the recursion limit. |
| |
| // All input is normalized, now transform. |
| </span>(@ { |
| <span class="comment">// The index of the future to poll first (in bias mode), or the RNG |
| // expression to use to pick a future to poll first. |
| </span>start=<span class="macro-nonterminal">$start</span>:expr; |
| |
| <span class="comment">// One `_` for each branch in the `select!` macro. Passing this to |
| // `count!` converts $skip to an integer. |
| </span>( $(<span class="macro-nonterminal">$count</span>:tt)* ) |
| |
| <span class="comment">// Normalized select branches. `( $skip )` is a set of `_` characters. |
| // There is one `_` for each select branch **before** this one. Given |
| // that all input futures are stored in a tuple, $skip is useful for |
| // generating a pattern to reference the future for the current branch. |
| // $skip is also used as an argument to `count!`, returning the index of |
| // the current select branch. |
| </span>$( ( $(<span class="macro-nonterminal">$skip</span>:tt)* ) <span class="macro-nonterminal">$bind</span>:pat = <span class="macro-nonterminal">$fut</span>:expr, <span class="kw">if </span><span class="macro-nonterminal">$c</span>:expr => <span class="macro-nonterminal">$handle</span>:expr, )+ |
| |
| <span class="comment">// Fallback expression used when all select branches have been disabled. |
| </span>; <span class="macro-nonterminal">$</span><span class="kw">else</span>:<span class="macro-nonterminal">expr |
| |
| </span>}) => {{ |
| <span class="comment">// Enter a context where stable "function-like" proc macros can be used. |
| // |
| // This module is defined within a scope and should not leak out of this |
| // macro. |
| </span><span class="attribute">#[doc(hidden)] |
| </span><span class="kw">mod </span>__tokio_select_util { |
| <span class="comment">// Generate an enum with one variant per select branch |
| </span><span class="macro-nonterminal">$</span><span class="macro">crate::select_priv_declare_output_enum!</span>( ( $(<span class="macro-nonterminal">$count</span>)* ) ); |
| } |
| |
| <span class="comment">// `tokio::macros::support` is a public, but doc(hidden) module |
| // including a re-export of all types needed by this macro. |
| </span><span class="kw">use </span><span class="macro-nonterminal">$crate::macros::support::Future</span>; |
| <span class="kw">use </span><span class="macro-nonterminal">$crate::macros::support::Pin</span>; |
| <span class="kw">use </span><span class="macro-nonterminal">$crate::macros::support::Poll</span>::{Ready, Pending}; |
| |
| <span class="kw">const </span>BRANCHES: u32 = <span class="macro-nonterminal">$</span><span class="macro">crate::count!</span>( $(<span class="macro-nonterminal">$count</span>)* ); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>disabled: __tokio_select_util::Mask = Default::default(); |
| |
| <span class="comment">// First, invoke all the pre-conditions. For any that return true, |
| // set the appropriate bit in `disabled`. |
| </span>$( |
| <span class="kw">if </span>!<span class="macro-nonterminal">$c </span>{ |
| <span class="kw">let </span>mask: __tokio_select_util::Mask = <span class="number">1 </span><< <span class="macro-nonterminal">$</span><span class="macro">crate::count!</span>( $(<span class="macro-nonterminal">$skip</span>)* ); |
| disabled |= mask; |
| } |
| )* |
| |
| <span class="comment">// Create a scope to separate polling from handling the output. This |
| // adds borrow checker flexibility when using the macro. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>output = { |
| <span class="comment">// Safety: Nothing must be moved out of `futures`. This is to |
| // satisfy the requirement of `Pin::new_unchecked` called below. |
| // |
| // We can't use the `pin!` macro for this because `futures` is a |
| // tuple and the standard library provides no way to pin-project to |
| // the fields of a tuple. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>futures = ( $( <span class="macro-nonterminal">$fut </span>, )+ ); |
| |
| <span class="comment">// This assignment makes sure that the `poll_fn` closure only has a |
| // reference to the futures, instead of taking ownership of them. |
| // This mitigates the issue described in |
| // <https://internals.rust-lang.org/t/surprising-soundness-trouble-around-pollfn/17484> |
| </span><span class="kw">let </span><span class="kw-2">mut </span>futures = <span class="kw-2">&mut </span>futures; |
| |
| <span class="macro-nonterminal">$crate::macros::support::poll_fn</span>(|cx| { |
| <span class="comment">// Track if any branch returns pending. If no branch completes |
| // **or** returns pending, this implies that all branches are |
| // disabled. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>is_pending = <span class="bool-val">false</span>; |
| |
| <span class="comment">// Choose a starting index to begin polling the futures at. In |
| // practice, this will either be a pseudo-randomly generated |
| // number by default, or the constant 0 if `biased;` is |
| // supplied. |
| </span><span class="kw">let </span>start = <span class="macro-nonterminal">$start</span>; |
| |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..BRANCHES { |
| <span class="kw">let </span>branch; |
| <span class="attribute">#[allow(clippy::modulo_one)] |
| </span>{ |
| branch = (start + i) % BRANCHES; |
| } |
| <span class="kw">match </span>branch { |
| $( |
| <span class="attribute">#[allow(unreachable_code)] |
| </span><span class="macro-nonterminal">$</span><span class="macro">crate::count!</span>( $(<span class="macro-nonterminal">$skip</span>)* ) => { |
| <span class="comment">// First, if the future has previously been |
| // disabled, do not poll it again. This is done |
| // by checking the associated bit in the |
| // `disabled` bit field. |
| </span><span class="kw">let </span>mask = <span class="number">1 </span><< branch; |
| |
| <span class="kw">if </span>disabled & mask == mask { |
| <span class="comment">// The future has been disabled. |
| </span><span class="kw">continue</span>; |
| } |
| |
| <span class="comment">// Extract the future for this branch from the |
| // tuple |
| </span><span class="kw">let </span>( $(<span class="macro-nonterminal">$skip</span>,)* fut, .. ) = <span class="kw-2">&mut *</span>futures; |
| |
| <span class="comment">// Safety: future is stored on the stack above |
| // and never moved. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>fut = <span class="kw">unsafe </span>{ Pin::new_unchecked(fut) }; |
| |
| <span class="comment">// Try polling it |
| </span><span class="kw">let </span>out = <span class="kw">match </span>Future::poll(fut, cx) { |
| Ready(out) => out, |
| Pending => { |
| <span class="comment">// Track that at least one future is |
| // still pending and continue polling. |
| </span>is_pending = <span class="bool-val">true</span>; |
| <span class="kw">continue</span>; |
| } |
| }; |
| |
| <span class="comment">// Disable the future from future polling. |
| </span>disabled |= mask; |
| |
| <span class="comment">// The future returned a value, check if matches |
| // the specified pattern. |
| </span><span class="attribute">#[allow(unused_variables)] |
| #[allow(unused_mut)] |
| </span><span class="kw">match </span><span class="kw-2">&</span>out { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select_priv_clean_pattern!</span>(<span class="macro-nonterminal">$bind</span>) => {} |
| <span class="kw">_ </span>=> <span class="kw">continue</span>, |
| } |
| |
| <span class="comment">// The select is complete, return the value |
| </span><span class="kw">return </span>Ready(<span class="macro-nonterminal">$</span><span class="macro">crate::select_variant!</span>(<span class="macro-nonterminal">__tokio_select_util::Out</span>, ($(<span class="macro-nonterminal">$skip</span>)<span class="kw-2">*</span>))(out)); |
| } |
| )* |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(<span class="string">"reaching this means there probably is an off by one bug"</span>), |
| } |
| } |
| |
| <span class="kw">if </span>is_pending { |
| Pending |
| } <span class="kw">else </span>{ |
| <span class="comment">// All branches have been disabled. |
| </span>Ready(__tokio_select_util::Out::Disabled) |
| } |
| }).<span class="kw">await |
| </span>}; |
| |
| <span class="kw">match </span>output { |
| $( |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select_variant!</span>(<span class="macro-nonterminal">__tokio_select_util::Out</span>, ($(<span class="macro-nonterminal">$skip</span>)<span class="kw-2">*</span>) (<span class="macro-nonterminal">$bind</span>)) => <span class="macro-nonterminal">$handle</span>, |
| )* |
| __tokio_select_util::Out::Disabled => <span class="macro-nonterminal">$</span><span class="kw">else</span>, |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(<span class="string">"failed to match bind"</span>), |
| } |
| }}; |
| |
| <span class="comment">// ==== Normalize ===== |
| |
| // These rules match a single `select!` branch and normalize it for |
| // processing by the first rule. |
| |
| </span>(@ { <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>:expr; $(<span class="macro-nonterminal">$t</span>:tt)* } ) => { |
| <span class="comment">// No `else` branch |
| </span><span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; $(<span class="macro-nonterminal">$t</span>)<span class="kw-2">*</span>; <span class="macro">panic!</span>(<span class="string">"all branches are disabled and there is no else branch"</span>) }) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="kw">else </span>=> <span class="macro-nonterminal">$</span><span class="kw">else</span>:<span class="macro-nonterminal">expr </span>$(,)<span class="question-mark">?</span>) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; $(<span class="macro-nonterminal">$t</span>)<span class="kw-2">*</span>; <span class="macro-nonterminal">$</span><span class="kw">else </span>}) |
| }; |
| (@ { <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr, <span class="kw">if </span><span class="macro-nonterminal">$c</span>:expr => <span class="macro-nonterminal">$h</span>:block, $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="macro-nonterminal">$c </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr => <span class="macro-nonterminal">$h</span>:block, $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="bool-val">true </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr, <span class="kw">if </span><span class="macro-nonterminal">$c</span>:expr => <span class="macro-nonterminal">$h</span>:block $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="macro-nonterminal">$c </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr => <span class="macro-nonterminal">$h</span>:block $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="bool-val">true </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr, <span class="kw">if </span><span class="macro-nonterminal">$c</span>:expr => <span class="macro-nonterminal">$h</span>:expr ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="macro-nonterminal">$c </span>=> <span class="macro-nonterminal">$h</span>, }) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr => <span class="macro-nonterminal">$h</span>:expr ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="bool-val">true </span>=> <span class="macro-nonterminal">$h</span>, }) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr, <span class="kw">if </span><span class="macro-nonterminal">$c</span>:expr => <span class="macro-nonterminal">$h</span>:expr, $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="macro-nonterminal">$c </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| (@ { start=<span class="macro-nonterminal">$start</span>:expr; ( $(<span class="macro-nonterminal">$s</span>:tt)* ) $(<span class="macro-nonterminal">$t</span>:tt)* } <span class="macro-nonterminal">$p</span>:pat = <span class="macro-nonterminal">$f</span>:expr => <span class="macro-nonterminal">$h</span>:expr, $(<span class="macro-nonterminal">$r</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="macro-nonterminal">$start</span>; ($(<span class="macro-nonterminal">$s</span>)* <span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>)* ($(<span class="macro-nonterminal">$s</span>)<span class="kw-2">*</span>) <span class="macro-nonterminal">$p </span>= <span class="macro-nonterminal">$f</span>, <span class="kw">if </span><span class="bool-val">true </span>=> <span class="macro-nonterminal">$h</span>, } $(<span class="macro-nonterminal">$r</span>)<span class="kw-2">*</span>) |
| }; |
| |
| <span class="comment">// ===== Entry point ===== |
| |
| </span>(biased; <span class="macro-nonterminal">$p</span>:pat = $(<span class="macro-nonterminal">$t</span>:tt)* ) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>=<span class="number">0</span>; () } <span class="macro-nonterminal">$p </span>= $(<span class="macro-nonterminal">$t</span>)<span class="kw-2">*</span>) |
| }; |
| |
| ( <span class="macro-nonterminal">$p</span>:pat = $(<span class="macro-nonterminal">$t</span>:tt)* ) => { |
| <span class="comment">// Randomly generate a starting point. This makes `select!` a bit more |
| // fair and avoids always polling the first future. |
| </span><span class="macro-nonterminal">$</span><span class="macro">crate::select!</span>(@{ <span class="macro-nonterminal">start</span>={ <span class="macro-nonterminal">$crate::macros::support::thread_rng_n</span>(BRANCHES) }; () } <span class="macro-nonterminal">$p </span>= $(<span class="macro-nonterminal">$t</span>)<span class="kw-2">*</span>) |
| }; |
| () => { |
| <span class="macro">compile_error!</span>(<span class="string">"select! requires at least one branch."</span>) |
| }; |
| } |
| |
| <span class="comment">// And here... we manually list out matches for up to 64 branches... I'm not |
| // happy about it either, but this is how we manage to use a declarative macro! |
| |
| </span><span class="attribute">#[macro_export] |
| #[doc(hidden)] |
| </span><span class="macro">macro_rules! </span>count { |
| () => { |
| <span class="number">0 |
| </span>}; |
| (<span class="kw">_</span>) => { |
| <span class="number">1 |
| </span>}; |
| (<span class="kw">_ _</span>) => { |
| <span class="number">2 |
| </span>}; |
| (<span class="kw">_ _ _</span>) => { |
| <span class="number">3 |
| </span>}; |
| (<span class="kw">_ _ _ _</span>) => { |
| <span class="number">4 |
| </span>}; |
| (<span class="kw">_ _ _ _ _</span>) => { |
| <span class="number">5 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _</span>) => { |
| <span class="number">6 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _</span>) => { |
| <span class="number">7 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _</span>) => { |
| <span class="number">8 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">9 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">10 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">11 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">12 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">13 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">14 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">15 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">16 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">17 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">18 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">19 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">20 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">21 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">22 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">23 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">24 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">25 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">26 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">27 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">28 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">29 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">30 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">31 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">32 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">33 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">34 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">35 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">36 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">37 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">38 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">39 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">40 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">41 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">42 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">43 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">44 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">45 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">46 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">47 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">48 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">49 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">50 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">51 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">52 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">53 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">54 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">55 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">56 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">57 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">58 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">59 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">60 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">61 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">62 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">63 |
| </span>}; |
| (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) => { |
| <span class="number">64 |
| </span>}; |
| } |
| |
| <span class="attribute">#[macro_export] |
| #[doc(hidden)] |
| </span><span class="macro">macro_rules! </span>select_variant { |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, () $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_0 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_1 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_2 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_3 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_4 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_5 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_6 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_7 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_8 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_9 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_10 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_11 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_12 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_13 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_14 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_15 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_16 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_17 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_18 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_19 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_20 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_21 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_22 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_23 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_24 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_25 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_26 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_27 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_28 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_29 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_30 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_31 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_32 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_33 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_34 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_35 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_36 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_37 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_38 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_39 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_40 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_41 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_42 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_43 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_44 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_45 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_46 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_47 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_48 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_49 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_50 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_51 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_52 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_53 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_54 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_55 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_56 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_57 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_58 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_59 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_60 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_61 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_62 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| ($(<span class="macro-nonterminal">$p</span>:ident)::<span class="kw-2">*</span>, (<span class="kw">_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _</span>) $(<span class="macro-nonterminal">$t</span>:tt)<span class="kw-2">*</span>) => { |
| $(<span class="macro-nonterminal">$p</span>)::<span class="kw-2">*</span>::_63 $(<span class="macro-nonterminal">$t</span>)* |
| }; |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
