95 lines
5.5 KiB
HTML
95 lines
5.5 KiB
HTML
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<title>std::discard_block_engine<Engine,P,R>::discard_block_engine</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::discard_block_engine<Engine,P,R>::</span>discard_block_engine</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-numeric.html">numeric</a>‎ | <a href="cpp-numeric-random.html">random</a>‎ | <a href="cpp-numeric-random-discard_block_engine.html">discard block engine</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<div class="t-page-template" style="">
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<p></p>
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</div>
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<table class="t-dcl-begin">
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<tbody>
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<tr class="t-dcl t-since-cxx11">
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<td>
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<div><span class="mw-geshi cpp source-cpp">discard_block_engine<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> discard_block_engine<span class="br0">(</span> result_type s <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx11">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Sseq <span class="sy1">></span><br />
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<span class="kw1">explicit</span> discard_block_engine<span class="br0">(</span> Sseq<span class="sy3">&</span> seq <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx11">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> discard_block_engine<span class="br0">(</span> <span class="kw4">const</span> Engine<span class="sy3">&</span> e <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(4)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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</tr>
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<tr class="t-dcl t-since-cxx11">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> discard_block_engine<span class="br0">(</span> Engine<span class="sy3">&&</span> e <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(5)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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</tr>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<p>构造新的伪随机数引擎适配器。</p>
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<div class="t-li1"><span class="t-li">1)</span> 默认构造函数。亦默认构造底层引擎。</div>
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<div class="t-li1"><span class="t-li">2)</span> 以 <code>s</code> 构造底层引擎</div>
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<div class="t-li1"><span class="t-li">3)</span> 以种子序列 <code>seq</code> 构造底层引擎。此构造函数仅若 <code>Sseq</code> 满足<a href="cpp-named_req-SeedSequence.html"><span style="font-style:italic">种子序列</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(SeedSequence)</span></a> 才参与重载决议。特别是若 <code>Sseq</code> 可隐式转换为 <code>result_type</code> 则此构造函数不参与重载决议。</div>
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<div class="t-li1"><span class="t-li">4)</span> 以 <code>e</code> 的副本构造底层引擎。</div>
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<div class="t-li1"><span class="t-li">5)</span> 以 <code>e</code> 移动构造底层引擎。之后 <code>e</code> 保有未指定但合法的状态。</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<tr class="t-par">
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<td>s</td>
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<td>-</td>
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<td>用以构造底层引擎的整数值</td>
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</tr>
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<tr class="t-par">
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<td>seq</td>
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<td>-</td>
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<td>用以构造底层引擎的种子序列</td>
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</tr>
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<tr class="t-par">
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<td>e</td>
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<td>-</td>
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<td>用以初始化的伪随机数引擎</td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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