61 lines
5.4 KiB
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61 lines
5.4 KiB
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::experimental::ranges::</span>UniformRandomNumberGenerator</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a>‎ | <a href="cpp-experimental-ranges.html">ranges</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-experimental-ranges-random.html"><experimental/ranges/random></a></code></div>
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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> G<span class="sy1">></span><br /></span>
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<p>concept <span class="kw4">bool</span> UniformRandomNumberGenerator <span class="sy1">=</span><br />
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<a href="cpp-experimental-ranges-concepts-Invocable.html"><span class="kw2556">ranges::<span class="me2">Invocable</span></span></a><span class="sy1"><</span>G<span class="sy3">&</span><span class="sy1">></span> <span class="sy3">&&</span><br />
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<a href="cpp-experimental-ranges-concepts-UnsignedIntegral.html"><span class="kw2537">ranges::<span class="me2">UnsignedIntegral</span></span></a><span class="sy1"><</span><a href="cpp-types-result_of.html"><span class="kw640">std::<span class="me2">result_of_t</span></span></a><span class="sy1"><</span>G<span class="sy3">&</span><span class="br0">(</span><span class="br0">)</span><span class="sy1">>></span> <span class="sy3">&&</span><br />
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requires <span class="br0">{</span><br />
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<span class="br0">{</span> G<span class="sy4">::</span><span class="me2">min</span><span class="br0">(</span><span class="br0">)</span> <span class="br0">}</span> <span class="sy2">-</span><span class="sy1">></span> <a href="cpp-experimental-ranges-concepts-Same.html"><span class="kw2530">ranges::<span class="me2">Same</span></span></a><span class="sy1"><</span><a href="cpp-types-result_of.html"><span class="kw640">std::<span class="me2">result_of_t</span></span></a><span class="sy1"><</span>G<span class="sy3">&</span><span class="br0">(</span><span class="br0">)</span><span class="sy1">>></span><span class="sy3">&&</span><span class="sy4">;</span><br />
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<span class="br0">{</span> G<span class="sy4">::</span><span class="me2">max</span><span class="br0">(</span><span class="br0">)</span> <span class="br0">}</span> <span class="sy2">-</span><span class="sy1">></span> <a href="cpp-experimental-ranges-concepts-Same.html"><span class="kw2530">ranges::<span class="me2">Same</span></span></a><span class="sy1"><</span><a href="cpp-types-result_of.html"><span class="kw640">std::<span class="me2">result_of_t</span></span></a><span class="sy1"><</span>G<span class="sy3">&</span><span class="br0">(</span><span class="br0">)</span><span class="sy1">>></span><span class="sy3">&&</span><span class="sy4">;</span><br /></p>
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<span class="br0">}</span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span></td>
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<p>概念 <code>UniformRandomNumberGenerator<G></code> 指定 <code>G</code> 是均匀随机数生成器的类型，即 <code>G</code> 类型对象是返回无符号整数的函数对象，使得可能结果范围中的每个值都拥有（概念上）相等的被返回概率。</p>
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<p><code>UniformRandomNumberGenerator<G></code> 仅若符合下列条件才得到满足。给定任何 <code>G</code> 类型对象 <code>g</code> ：</p>
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<li><code>G::min()</code> 与 <code>G::max()</code> 是纯右值常量表达式；</li>
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<li><code>G::min() < G::max()</code></li>
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<li><code>g()</code> 在 <code>[G::min(), G::max()]</code> 范围中</li>
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<li><code>g()</code> 拥有均摊常数复杂度。</li>
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