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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>future_error</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-thread.html">thread</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-future.html">&lt;future&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> future_error<span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#31867; <span class="t-lc"><strong class="selflink">std::future_error</strong></span> &#23450;&#20041;&#24322;&#24120;&#23545;&#35937;&#65292;&#23427;&#20026;&#22788;&#29702;&#24322;&#27493;&#25191;&#34892;&#21644;&#20849;&#20139;&#29366;&#24577;&#65288; <span class="t-lc"><a href="cpp-thread-future.html">std::future</a></span> &#12289; <span class="t-lc"><a href="cpp-thread-promise.html">std::promise</a></span> &#31561;&#65289;&#30340;&#32447;&#31243;&#24211;&#20013;&#30340;&#20989;&#25968;&#22312;&#22833;&#36133;&#26102;&#25243;&#20986;&#12290;&#21516; <span class="t-lc"><a href="cpp-error-system_error.html">std::system_error</a></span> &#65292;&#27492;&#24322;&#24120;&#25658;&#24102;&#19982; <span class="t-lc"><a href="cpp-error-error_code.html">std::error_code</a></span> &#20860;&#23481;&#30340;&#38169;&#35823;&#30721;&#12290;</p>
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<p><span style="font-size:0.7em; line-height:130%">&#32487;&#25215;&#22270;</span></p>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
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<div><a href="cpp-thread-future_error-future_error.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
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<td>&#21019;&#24314; <code>std::future_error</code> &#23545;&#35937;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-thread-future_error-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
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<td>&#26367;&#25442; <code>std::future_error</code> &#23545;&#35937;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-thread-future_error-code.html"><span class="t-lines"><span>code</span></span></a></div>
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<td>&#36820;&#22238;&#38169;&#35823;&#30721;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-thread-future_error-what.html"><span class="t-lines"><span>what</span></span></a></div>
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<td>&#36820;&#22238;&#23545;&#38169;&#35823;&#30721;&#25351;&#23450;&#30340;&#35299;&#37322;&#24615;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h2><span class="mw-headline" id=".E7.BB.A7.E6.89.BF.E8.87.AA_std::logic_error">&#32487;&#25215;&#33258; <a href="cpp-error-logic_error.html"><span style="font-size:0.7em; line-height:130%">std::</span>logic_error</a></span></h2>
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<h2><span class="mw-headline" id=".E7.BB.A7.E6.89.BF.E8.87.AA_std::exception">&#32487;&#25215;&#33258; <a href="cpp-error-exception.html"><span style="font-size:0.7em; line-height:130%">std::</span>exception</a></span></h2>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0_2">&#25104;&#21592;&#20989;&#25968;</span></h3>
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<div><a href="cpp-error-exception-~exception.html"><span class="t-lines"><span>(&#26512;&#26500;&#20989;&#25968;)</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#26512;&#26500;&#35813;&#24322;&#24120;&#23545;&#35937;<br />
<span class="t-mark">(<code>std::exception</code> &#30340;&#34394;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-error-exception-what.html"><span class="t-lines"><span>what</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#36820;&#22238;&#35299;&#37322;&#24615;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(<code>std::exception</code> &#30340;&#34394;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;future&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-thread-future.html"><span class="kw2180">std::<span class="me2">future</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> empty<span class="sy4">;</span>
<span class="kw1">try</span> <span class="br0">{</span>
<span class="kw4">int</span> n <span class="sy1">=</span> empty.<span class="me1">get</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#34892;&#20026;&#26410;&#23450;&#20041;&#65292;&#20294;&#19968;&#20123;&#23454;&#29616;&#25243;&#20986; std::future_error</span>
<span class="br0">}</span> <span class="kw1">catch</span> <span class="br0">(</span><span class="kw4">const</span> std<span class="sy4">::</span><span class="me2">future_error</span><span class="sy3">&amp;</span> e<span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Caught a future_error with code <span class="es1">\&quot;</span>&quot;</span> <span class="sy1">&lt;&lt;</span> e.<span class="me1">code</span><span class="br0">(</span><span class="br0">)</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span><span class="es1">\n</span>Message: <span class="es1">\&quot;</span>&quot;</span> <span class="sy1">&lt;&lt;</span> e.<span class="me1">what</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span><span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">Caught a future_error with code &quot;future:3&quot;
Message: &quot;No associated state&quot;</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-thread-future_errc.html"><span class="t-lines"><span>future_errc</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>&#37492;&#21035; future &#38169;&#35823;&#30721;<br />
<span class="t-mark">(&#26522;&#20030;)</span></td>
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