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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>data</h1>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-array.html">&lt;array&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-deque.html">&lt;deque&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-iterator.html">&lt;iterator&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-regex.html">&lt;regex&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-set.html">&lt;set&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-span.html">&lt;span&gt;</a></code></div>
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<div><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-string.html">&lt;string&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-string_view.html">&lt;string_view&gt;</a></code></div>
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<div><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-unordered_map.html">&lt;unordered_map&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-unordered_set.html">&lt;unordered_set&gt;</a></code></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-vector.html">&lt;vector&gt;</a></code></div>
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<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> C<span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> <span class="kw4">auto</span> data<span class="br0">(</span>C<span class="sy3">&amp;</span> c<span class="br0">)</span> <span class="sy2">-</span><span class="sy1">&gt;</span> decltype<span class="br0">(</span>c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<tr class="t-dcl t-since-cxx17">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> C<span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> <span class="kw4">auto</span> data<span class="br0">(</span><span class="kw4">const</span> C<span class="sy3">&amp;</span> c<span class="br0">)</span> <span class="sy2">-</span><span class="sy1">&gt;</span> decltype<span class="br0">(</span>c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
<tr class="t-dcl t-since-cxx17">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> N<span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> T<span class="sy2">*</span> data<span class="br0">(</span>T <span class="br0">(</span><span class="sy3">&amp;</span>array<span class="br0">)</span><span class="br0">[</span>N<span class="br0">]</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(3)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
<tr class="t-dcl t-since-cxx17">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> E<span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> <span class="kw4">const</span> E<span class="sy2">*</span> data<span class="br0">(</span><a href="cpp-utility-initializer_list.html"><span class="kw959">std::<span class="me2">initializer_list</span></span></a><span class="sy1">&lt;</span>E<span class="sy1">&gt;</span> il<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
</td>
<td>(4)</td>
<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
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<p>&#36820;&#22238;&#25351;&#21521;&#21547;&#26377;&#33539;&#22260;&#20803;&#32032;&#30340;&#20869;&#23384;&#22359;&#30340;&#25351;&#38024;&#12290;</p>
<div class="t-li1"><span class="t-li">1,2)</span> &#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp">c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">3)</span> &#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp">array</span></span></div>
<div class="t-li1"><span class="t-li">4)</span> &#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp">il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span></span></span></div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>c</td>
<td>-</td>
<td>&#26377; <span class="t-c"><span class="mw-geshi cpp source-cpp">data<span class="br0">(</span><span class="br0">)</span></span></span> &#26041;&#27861;&#30340;&#23481;&#22120;&#25110;&#35270;&#22270;</td>
</tr>
<tr class="t-par">
<td>array</td>
<td>-</td>
<td>&#20219;&#24847;&#31867;&#22411;&#30340;&#25968;&#32452;</td>
</tr>
<tr class="t-par">
<td>il</td>
<td>-</td>
<td>initializer_list</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#25351;&#21521;&#21547;&#26377;&#23481;&#22120;&#33539;&#22260;&#30340;&#20869;&#23384;&#22359;&#30340;&#25351;&#38024;&#12290;</p>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
<div class="t-li1"><span class="t-li">1)</span> &#21487;&#33021;&#25243;&#20986;&#23454;&#29616;&#23450;&#20041;&#30340;&#24322;&#24120;&#12290;</div>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#38656;&#35201;&#23545; <span class="t-lc"><a href="cpp-utility-initializer_list.html">std::initializer_list</a></span> &#30340;&#37325;&#36733;&#65292;&#22240;&#20026;&#23427;&#26080;&#25104;&#21592;&#20989;&#25968; <code>data</code> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.AF.E8.83.BD.E7.9A.84.E5.AE.9E.E7.8E.B0">&#21487;&#33021;&#30340;&#23454;&#29616;</span></h3>
<table class="eq-fun-cpp-table">
<tr>
<th>&#29256;&#26412;&#19968;</th>
</tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> C<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">auto</span> data<span class="br0">(</span>C<span class="sy3">&amp;</span> c<span class="br0">)</span> <span class="sy2">-</span><span class="sy1">&gt;</span> decltype<span class="br0">(</span>c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw1">return</span> c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
</td>
</tr>
<tr>
<th>&#29256;&#26412;&#20108;</th>
</tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> C<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">auto</span> data<span class="br0">(</span><span class="kw4">const</span> C<span class="sy3">&amp;</span> c<span class="br0">)</span> <span class="sy2">-</span><span class="sy1">&gt;</span> decltype<span class="br0">(</span>c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw1">return</span> c.<span class="me1">data</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
</td>
</tr>
<tr>
<th>&#29256;&#26412;&#19977;</th>
</tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> T, <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> N<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> T<span class="sy2">*</span> data<span class="br0">(</span>T <span class="br0">(</span><span class="sy3">&amp;</span>array<span class="br0">)</span><span class="br0">[</span>N<span class="br0">]</span><span class="br0">)</span> <span class="kw1">noexcept</span>
<span class="br0">{</span>
<span class="kw1">return</span> array<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
</td>
</tr>
<tr>
<th>&#29256;&#26412;&#22235;</th>
</tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> E<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> <span class="kw4">const</span> E<span class="sy2">*</span> data<span class="br0">(</span><a href="cpp-utility-initializer_list.html"><span class="kw959">std::<span class="me2">initializer_list</span></span></a><span class="sy1">&lt;</span>E<span class="sy1">&gt;</span> il<span class="br0">)</span> <span class="kw1">noexcept</span>
<span class="br0">{</span>
<span class="kw1">return</span> il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;string&gt;</span>
<span class="co2">#include &lt;cstring&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-string-basic_string.html"><span class="kw1229">std::<span class="me2">string</span></span></a> s <span class="br0">{</span><span class="st0">&quot;Hello world!<span class="es1">\n</span>&quot;</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw4">char</span> a<span class="br0">[</span><span class="nu0">20</span><span class="br0">]</span><span class="sy4">;</span> <span class="co1">// C-style &#39118;&#26684;&#23383;&#31526;&#20018;&#30340;&#23384;&#20648;</span>
<a href="cpp-string-byte-strcpy.html"><span class="kw1139">std::<span class="me2">strcpy</span></span></a><span class="br0">(</span>a, std<span class="sy4">::</span><span class="me2">data</span><span class="br0">(</span>s<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// C++11 &#36215; [s.data(), s.data() + s.size()] &#20445;&#35777;&#20026; NTBS</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> a<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">Hello world!</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-ranges-data.html"><span class="t-lines"><span>ranges::data</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#33719;&#24471;&#25351;&#21521;&#36830;&#32493;&#33539;&#22260;&#30340;&#36215;&#22987;&#30340;&#25351;&#38024;<br />
<span class="t-mark">(&#23450;&#21046;&#28857;&#23545;&#35937;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-ranges-cdata.html"><span class="t-lines"><span>ranges::cdata</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#33719;&#24471;&#25351;&#21521;&#21482;&#35835;&#36830;&#32493;&#33539;&#22260;&#30340;&#36215;&#22987;&#30340;&#25351;&#38024;<br />
<span class="t-mark">(&#23450;&#21046;&#28857;&#23545;&#35937;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
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