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<title>std::va_list</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>va_list</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-utility.html">utility</a>‎ | <a href="cpp-utility-variadic.html">variadic</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-cstdarg.html"><cstdarg></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">typedef</span> <span class="coMULTI">/* unspecified */</span> <span class="kw4">va_list</span><span class="sy4">;</span></span></div>
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<p><code>va_list</code> 是适用于保有宏 <span class="t-lc"><a href="cpp-utility-variadic-va_start.html">va_start</a></span> 、 <span class="t-lc"><a href="cpp-utility-variadic-va_arg.html">va_arg</a></span> 及 <span class="t-lc"><a href="cpp-utility-variadic-va_end.html">va_end</a></span> 所需信息的完整对象类型。</p>
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<p>若创建 <code>va_list</code> 实例，并传递给另一函数，且通过 <span class="t-lc"><a href="cpp-utility-variadic-va_arg.html">va_arg</a></span> 在该函数中使用，则调用方函数的任何后继使用必须前附对 <span class="t-lc"><a href="cpp-utility-variadic-va_end.html">va_end</a></span> 的调用。</p>
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<p>传递指向 <code>va_list</code> 对象的指针给另一函数，并在函数返回后使用该对象是合法的。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-utility-variadic-va_start.html"><span class="t-lines"><span>va_start</span></span></a></div>
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</td>
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<td>启用对可变函数实参的访问<br />
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<span class="t-mark">(宏函数)</span></td>
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<div><a href="cpp-utility-variadic-va_copy.html"><span class="t-lines"><span>va_copy</span></span></a></div>
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<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>制造可变函数实参的副本<br />
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<span class="t-mark">(宏函数)</span></td>
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<div><a href="cpp-utility-variadic-va_arg.html"><span class="t-lines"><span>va_arg</span></span></a></div>
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<td>访问下一个可变函数实参<br />
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<div><a href="cpp-utility-variadic-va_end.html"><span class="t-lines"><span>va_end</span></span></a></div>
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<td>结束对可变函数实参的遍历<br />
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<span class="t-mark">(宏函数)</span></td>
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