213 lines
15 KiB
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213 lines
15 KiB
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<title>实验性库头文件 <experimental/memory_resource></title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">实验性库头文件</span> <experimental/memory_resource></h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-header.html">header</a>‎ | <a href="cpp-header-experimental.html">experimental</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p>此头文件是库基础 TS (<a href="cpp-experimental-lib_extensions.html">v1</a>, <a href="cpp-experimental-lib_extensions_2.html">v2</a>, <a href="cpp-experimental-lib_extensions_3.html">v3</a>) 的一部分。</p>
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<h3><span class="mw-headline" id=".E7.B1.BB">类</span></h3>
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<table class="t-dsc-begin">
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<td colspan="2">
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<div>定义于命名空间 <code>std::experimental::pmr</code></div>
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</td>
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<td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/memory_resource&action=edit&redlink=1" class="new" title="cpp/experimental/memory resource(页面不存在)"><span class="t-lines"><span>memory_resource</span></span></a></div>
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</div>
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</td>
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<td>一个抽象接口,用于各种封装内存资源的类<br />
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<span class="t-mark">(类)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/synchronized_pool_resource&action=edit&redlink=1" class="new" title="cpp/experimental/synchronized pool resource(页面不存在)"><span class="t-lines"><span>synchronized_pool_resource</span></span></a></div>
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</div>
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</td>
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<td>线程安全的 <span class="t-lc">memory_resource</span>,用于管理具有不同块大小的池中的分配<br />
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<span class="t-mark">(类)</span></td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/unsynchronized_pool_resource&action=edit&redlink=1" class="new" title="cpp/experimental/unsynchronized pool resource(页面不存在)"><span class="t-lines"><span>unsynchronized_pool_resource</span></span></a></div>
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</div>
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</td>
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<td>线程不安全的 <span class="t-lc">memory_resource</span>,用于管理具有不同块大小的池中的分配<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/monotonic_buffer_resource&action=edit&redlink=1" class="new" title="cpp/experimental/monotonic buffer resource(页面不存在)"><span class="t-lines"><span>monotonic_buffer_resource</span></span></a></div>
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</div>
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</td>
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<td>一种特殊用途的 <span class="t-lc">memory_resource</span>,仅在资源被销毁时才释放所分配内存<br />
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<span class="t-mark">(类)</span></td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/polymorphic_allocator&action=edit&redlink=1" class="new" title="cpp/experimental/polymorphic allocator(页面不存在)"><span class="t-lines"><span>polymorphic_allocator</span></span></a></div>
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</td>
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<td>以 <span class="t-lc">memory_resource</span> 构造,支持基于它的运行时多态的分配器<br />
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<span class="t-mark">(类模板)</span></td>
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<tr class="t-dsc">
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<div><a href="cpp-experimental-resource_adaptor.html"><span class="t-lines"><span>resource_adaptor</span></span></a></div>
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</div>
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</td>
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<td>适配一个分配器为一个 <span class="t-lc">memory_resource</span><br />
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<span class="t-mark">(别名模板)</span></td>
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</table>
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<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
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<table class="t-dsc-begin">
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<td colspan="2">
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<div>定义于命名空间 <code>std::experimental::pmr</code></div>
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</td>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E6.AF.94.E8.BE.83">比较</span></h5>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/memory_resource/operator_eq&action=edit&redlink=1" class="new" title="cpp/experimental/memory resource/operator eq(页面不存在)"><span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div>
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</td>
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<td>比较两个 <code>memory_resource</code><br />
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<span class="t-mark">(函数)</span></td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/pmr/polymorphic_allocator/operator_cmp&action=edit&redlink=1" class="new" title="cpp/experimental/pmr/polymorphic allocator/operator cmp(页面不存在)"><span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div>
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</div>
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</td>
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<td>比较两个分配器<br />
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<span class="t-mark">(函数模板)</span></td>
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<h5><span class="mw-headline" id=".E5.85.A8.E5.B1.80.E5.86.85.E5.AD.98.E8.B5.84.E6.BA.90">全局内存资源</span></h5>
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</td>
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<td>
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/new_delete_resource&action=edit&redlink=1" class="new" title="cpp/experimental/new delete resource(页面不存在)"><span class="t-lines"><span>new_delete_resource</span></span></a></div>
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</div>
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</td>
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<td>返回一个静态的程序范围 <code>memory_resource</code>,它使用全局 <span class="t-lc"><a href="cpp-memory-new-operator_new.html">operator new</a></span> 与 <span class="t-lc"><a href="cpp-memory-new-operator_delete.html">operator delete</a></span> 分配和解分配内存<br />
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<span class="t-mark">(函数)</span></td>
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<tr class="t-dsc">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/null_memory_resource&action=edit&redlink=1" class="new" title="cpp/experimental/null memory resource(页面不存在)"><span class="t-lines"><span>null_memory_resource</span></span></a></div>
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</div>
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</td>
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<td>返回一个不进行任何分配的静态 <code>memory_resource</code><br />
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<span class="t-mark">(函数)</span></td>
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<h5><span class="mw-headline" id=".E7.BC.BA.E7.9C.81.E5.86.85.E5.AD.98.E8.B5.84.E6.BA.90">缺省内存资源</span></h5>
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</td>
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<tr class="t-dsc">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/get_default_resource&action=edit&redlink=1" class="new" title="cpp/experimental/get default resource(页面不存在)"><span class="t-lines"><span>get_default_resource</span></span></a></div>
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</div>
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</td>
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<td>获取缺省 <code>memory_resource</code><br />
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<span class="t-mark">(函数)</span></td>
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<tr class="t-dsc">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/set_default_resource&action=edit&redlink=1" class="new" title="cpp/experimental/set default resource(页面不存在)"><span class="t-lines"><span>set_default_resource</span></span></a></div>
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</div>
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</td>
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<td>设置缺省 <code>memory_resource</code><br />
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<span class="t-mark">(函数)</span></td>
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</table>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">namespace</span> experimental <span class="br0">{</span>
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<span class="kw1">inline</span> <span class="kw1">namespace</span> fundamentals_v1 <span class="br0">{</span>
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<span class="kw1">namespace</span> pmr <span class="br0">{</span>
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<span class="kw1">class</span> memory_resource<span class="sy4">;</span>
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<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&</span> a,
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<span class="kw4">const</span> memory_resource<span class="sy3">&</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> memory_resource<span class="sy3">&</span> a,
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<span class="kw4">const</span> memory_resource<span class="sy3">&</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> Tp<span class="sy1">></span> <span class="kw1">class</span> polymorphic_allocator<span class="sy4">;</span>
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<span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> T1, <span class="kw1">class</span> T2<span class="sy1">></span>
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<span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy1"><</span>T1<span class="sy1">></span><span class="sy3">&</span> a,
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<span class="kw4">const</span> polymorphic_allocator<span class="sy1"><</span>T2<span class="sy1">></span><span class="sy3">&</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> T1, <span class="kw1">class</span> T2<span class="sy1">></span>
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<span class="kw4">bool</span> operator<span class="sy3">!</span><span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> polymorphic_allocator<span class="sy1"><</span>T1<span class="sy1">></span><span class="sy3">&</span> a,
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<span class="kw4">const</span> polymorphic_allocator<span class="sy1"><</span>T2<span class="sy1">></span><span class="sy3">&</span> b<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="co1">// 名字 resource_adaptor_imp 仅用于阐释。</span>
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<span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> Allocator<span class="sy1">></span> <span class="kw1">class</span> resource_adaptor_imp<span class="sy4">;</span>
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<span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> Allocator<span class="sy1">></span>
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<span class="kw1">using</span> resource_adaptor <span class="sy1">=</span> resource_adaptor_imp<span class="sy1"><</span>
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<span class="kw1">typename</span> allocator_traits<span class="sy1"><</span>Allocator<span class="sy1">></span><span class="sy4">::</span><span class="kw1">template</span> rebind_alloc<span class="sy1"><</span><span class="kw4">char</span><span class="sy1">>></span><span class="sy4">;</span>
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<span class="co1">// 全局内存资源</span>
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memory_resource<span class="sy2">*</span> new_delete_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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memory_resource<span class="sy2">*</span> null_memory_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="co1">// 缺省内存资源</span>
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memory_resource<span class="sy2">*</span> set_default_resource<span class="br0">(</span>memory_resource<span class="sy2">*</span> r<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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memory_resource<span class="sy2">*</span> get_default_resource<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
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<span class="co1">// 标准内存资源</span>
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<span class="kw1">struct</span> pool_options<span class="sy4">;</span>
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<span class="kw1">class</span> synchronized_pool_resource<span class="sy4">;</span>
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<span class="kw1">class</span> unsynchronized_pool_resource<span class="sy4">;</span>
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<span class="kw1">class</span> monotonic_buffer_resource<span class="sy4">;</span>
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<span class="br0">}</span> <span class="co1">// namespace pmr</span>
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<span class="br0">}</span> <span class="co1">// namespace fundamentals_v1</span>
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<span class="br0">}</span> <span class="co1">// namespace experimental</span>
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<span class="br0">}</span> <span class="co1">// namespace std</span></pre></div>
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