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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>basic_format_args</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-utility.html">utility</a>&lrm; | <a href="cpp-utility-format.html">format</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-format.html">&lt;format&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Context<span class="sy1">&gt;</span><br />
<span class="kw1">class</span> basic_format_args<span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">using</span> format_args <span class="sy1">=</span> basic_format_args<span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">format_context</span><span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">using</span> wformat_args <span class="sy1">=</span> basic_format_args<span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">wformat_context</span><span class="sy1">&gt;</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p>&#25552;&#20379;&#21040;&#26684;&#24335;&#21270;&#21442;&#25968;&#30340;&#35775;&#38382;&#12290;</p>
<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><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></div>
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<td>&#26500;&#36896; <code>basic_format_args</code> &#23545;&#35937;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><span class="t-lines"><span>get</span></span></div>
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<td>&#36820;&#22238;&#20301;&#20110;&#32473;&#23450;&#19979;&#26631;&#30340;&#26684;&#24335;&#21270;&#21442;&#25968;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h2><span class="mw-headline" id="std::basic_format_args::basic_format_args"><span style="font-size:0.7em; line-height:130%">std::basic_format_args::</span>basic_format_args</span></h2>
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<div><span class="mw-geshi cpp source-cpp">basic_format_args<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span>... <span class="me1">Args</span><span class="sy1">&gt;</span><br />
basic_format_args<span class="br0">(</span><span class="kw4">const</span> <span class="coMULTI">/*format-arg-store*/</span><span class="sy1">&lt;</span>Context, Args...<span class="sy1">&gt;</span><span class="sy3">&amp;</span> store<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<div class="t-li1"><span class="t-li">1)</span> &#26500;&#36896;&#19981;&#20445;&#26377;&#20219;&#20309;&#26684;&#24335;&#21270;&#21442;&#25968;&#30340; <code>basic_format_args</code> &#23545;&#35937;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#20174;&#35843;&#29992; <span class="t-lc">std::make_format_args</span> &#25110; <span class="t-lc">std::make_wformat_args</span> &#30340;&#32467;&#26524;&#26500;&#36896; <code>basic_format_args</code> &#23545;&#35937;&#12290;
<p><code>std::basic_format_args</code> &#25317;&#26377;&#24341;&#29992;&#35821;&#20041;&#12290;&#31243;&#24207;&#21592;&#36127;&#36131;&#30830;&#20445; <code>*this</code> &#19981;&#20250;&#27604; <code>store</code> &#27963;&#24471;&#26356;&#20037;&#65288;&#20174;&#32780;&#19981;&#24212;&#27604; <span class="t-lc">std::make_format_args</span> &#25110; <span class="t-lc">std::make_wformat_args</span> &#30340;&#21442;&#25968;&#23384;&#27963;&#26356;&#20037;&#65289;&#12290;</p>
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<h2><span class="mw-headline" id="std::basic_format_args::get"><span style="font-size:0.7em; line-height:130%">std::basic_format_args::</span>get</span></h2>
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<div><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">basic_format_arg</span><span class="sy1">&lt;</span>Context<span class="sy1">&gt;</span> get<span class="br0">(</span><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> i<span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<p>&#36820;&#22238;&#20445;&#26377; <code>args</code> &#20013;&#31532; <code>i</code> &#21442;&#25968;&#30340; <span class="t-lc">std::basic_format_arg</span> &#65292;&#20854;&#20013; <code>args</code> &#26159;&#20256;&#36882;&#32473; <span class="t-lc">std::make_format_args</span> &#25110; <span class="t-lc">std::make_wformat_args</span> &#30340;&#24418;&#21442;&#21253;&#12290;</p>
<p>&#33509;&#26080;&#36275;&#22815;&#30340;&#21442;&#25968;&#65288;&#21363; <code>*this</code> &#20026;&#40664;&#35748;&#26500;&#36896;&#25110; <code>i</code> &#19981;&#23567;&#20110;&#26684;&#24335;&#21270;&#21442;&#25968;&#25968;&#65289;&#65292;&#21017;&#36820;&#22238;&#40664;&#35748;&#26500;&#36896;&#30340; <span class="t-lc">std::basic_format_arg</span> &#65288;&#20445;&#26377; <span class="t-lc"><a href="cpp-utility-variant-monostate.html">std::monostate</a></span> &#23545;&#35937;&#65289;&#12290;</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<td class="mbox-text" style="">&#26412;&#33410;&#26410;&#23436;&#25104;<br />
&#21407;&#22240;&#65306;&#26242;&#26080;&#31034;&#20363;</td>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">&#32570;&#38519;&#25253;&#21578;</span></h3>
<p>&#19979;&#21015;&#26356;&#25913;&#34892;&#20026;&#30340;&#32570;&#38519;&#25253;&#21578;&#36861;&#28335;&#22320;&#24212;&#29992;&#20110;&#20197;&#21069;&#20986;&#29256;&#30340; C++ &#26631;&#20934;&#12290;</p>
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<th>DR</th>
<th>&#24212;&#29992;&#20110;</th>
<th>&#20986;&#29256;&#26102;&#30340;&#34892;&#20026;</th>
<th>&#27491;&#30830;&#34892;&#20026;</th>
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<td><a rel="nofollow" class="external text" href="https://wg21.link/P2216R3">P2216R3</a></td>
<td>C++20</td>
<td>&#30001;&#20110; <code>vformat_to</code> &#30340;&#36807;&#24230;&#21442;&#25968;&#21270;&#25552;&#20379;&#20102; <code>format_args_t</code></td>
<td>&#24050;&#31227;&#38500;</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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