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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>uses_allocator<small>&lt;std::tuple&gt;</small></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-tuple.html">tuple</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-tuple.html">&lt;tuple&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>... <span class="me1">Types</span>, <span class="kw1">class</span> Alloc <span class="sy1">&gt;</span><br />
<span class="kw1">struct</span> uses_allocator<span class="sy1">&lt;</span> <a href="cpp-utility-tuple.html"><span class="kw1098">std::<span class="me2">tuple</span></span></a><span class="sy1">&lt;</span>Types...<span class="sy1">&gt;</span>, Alloc <span class="sy1">&gt;</span> <span class="sy4">:</span> <a href="cpp-types-integral_constant.html"><span class="kw649">std::<span class="me2">true_type</span></span></a> <span class="br0">{</span> <span class="br0">}</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#27492; <span class="t-lc"><a href="cpp-memory-uses_allocator.html">std::uses_allocator</a></span> &#30340;&#29305;&#21270;&#21578;&#35785;&#20854;&#20182;&#24211;&#32452;&#20214; tuples &#25903;&#25345;<i>&#20351;&#29992;&#20998;&#37197;&#22120;&#26500;&#36896;</i>&#65292;&#21363;&#20351;&#23427;&#20204;&#26080;&#23884;&#22871;&#30340; <code>allocator_type</code>.</p>
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<h2><span class="mw-headline" id=".E7.BB.A7.E6.89.BF.E8.87.AA_std::integral_constant">&#32487;&#25215;&#33258; <a href="cpp-types-integral_constant.html"><span style="font-size:0.7em; line-height:130%">std::</span>integral_constant</a></span></h2>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.B8.B8.E9.87.8F">&#25104;&#21592;&#24120;&#37327;</span></h3>
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<div><span class="t-lines"><span>value</span></span></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#38745;&#24577;]</span></span></span></div>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span><br />
<span class="t-mark">(&#20844;&#24320;&#38745;&#24577;&#25104;&#21592;&#24120;&#37327;)</span></td>
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<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>operator bool</span></span></div>
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<td>&#36716;&#25442;&#23545;&#35937;&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span> &#65292;&#36820;&#22238; <code>value</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><span class="t-lines"><span>operator()</span></span></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
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<td>&#36820;&#22238; <code>value</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">&#25104;&#21592;&#31867;&#22411;</span></h3>
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<td><code>value_type</code></td>
<td><code>bool</code></td>
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<td><code>type</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-integral_constant.html"><span class="kw647">std::<span class="me2">integral_constant</span></span></a><span class="sy1">&lt;</span><span class="kw4">bool</span>, value<span class="sy1">&gt;</span></span></span></td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co1">// myalloc &#26159;&#24102;&#25509;&#25910; int &#30340;&#21333;&#21442;&#25968;&#26500;&#36896;&#20989;&#25968;&#30340;&#26377;&#29366;&#24577;&#20998;&#37197;&#22120;&#65288;Allocator&#65289;&#12290;</span>
<span class="co1">// &#23427;&#26080;&#40664;&#35748;&#26500;&#36896;&#20989;&#25968;</span>
<span class="kw1">typedef</span> <a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span>, myalloc<span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;&gt;</span> innervector_t<span class="sy4">;</span>
<span class="kw1">typedef</span> <a href="cpp-utility-tuple.html"><span class="kw1098">std::<span class="me2">tuple</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span>, innervector_t<span class="sy1">&gt;</span> elem_t<span class="sy4">;</span>
<span class="kw1">typedef</span> <a href="cpp-memory-scoped_allocator_adaptor.html"><span class="kw706">std::<span class="me2">scoped_allocator_adaptor</span></span></a><span class="sy1">&lt;</span> myalloc<span class="sy1">&lt;</span>elem_t<span class="sy1">&gt;</span>, myalloc<span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;&gt;</span> Alloc<span class="sy4">;</span>
Alloc a<span class="br0">(</span><span class="nu0">1</span>,<span class="nu0">2</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span>elem_t, Alloc<span class="sy1">&gt;</span> v<span class="br0">(</span>a<span class="br0">)</span><span class="sy4">;</span>
v.<span class="me1">resize</span><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#23545; v &#30340;&#20803;&#32032;&#29992;&#20998;&#37197;&#22120; #1</span>
std<span class="sy4">::</span><span class="me2">get</span><span class="sy1">&lt;</span><span class="nu0">1</span><span class="sy1">&gt;</span><span class="br0">(</span>v<span class="br0">[</span><span class="nu0">0</span><span class="br0">]</span><span class="br0">)</span>.<span class="me1">resize</span><span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#23545; innervector_t &#29992;&#20998;&#37197;&#22120; #2</span></pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-memory-uses_allocator.html"><span class="t-lines"><span>uses_allocator</span></span></a></div>
<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>&#26816;&#26597;&#25351;&#23450;&#30340;&#31867;&#22411;&#26159;&#21542;&#25903;&#25345;&#20351;&#29992;&#20998;&#37197;&#22120;&#30340;&#26500;&#36896;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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