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</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><strong class="selflink"> Library fundamentals</strong><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="optional.html" title="cpp/experimental/optional"><span class="t-lines"><span>experimental::optional</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="any.html" title="cpp/experimental/any"><span class="t-lines"><span>experimental::any</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_string_view.html" title="cpp/experimental/basic string view"><span class="t-lines"><span>experimental::basic_string_view</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="sample.html" title="cpp/experimental/sample"><span class="t-lines"><span>experimental::sample</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="apply.html" title="cpp/experimental/apply"><span class="t-lines"><span>experimental::apply</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="search.html" title="cpp/experimental/search"><span class="t-lines"><span>experimental::search</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="default_searcher.html" title="cpp/experimental/default searcher"><span class="t-lines"><span>experimental::default_searcher<br />experimental::make_default_searcher</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="boyer_moore_searcher.html" title="cpp/experimental/boyer moore searcher"><span class="t-lines"><span>experimental::boyer_moore_searcher<br />experimental::make_boyer_moore_searcher</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="boyer_moore_horspool_searcher.html" title="cpp/experimental/boyer moore horspool searcher"><span class="t-lines"><span>experimental::boyer_moore_horspool_searcher<br />experimental::make_boyer_moore_horspool_searcher</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="memory.html" title="cpp/experimental/memory" class="mw-redirect"><span class="t-lines"><span>type-erased and polymorphic allocators</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="type_trait_variable_templates.html" title="cpp/experimental/type trait variable templates"><span class="t-lines"><span>variable templates for type traits</span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/lib_extensions/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>The C++ Extensions for Library Fundamentals, ISO/IEC TS 19568:xxxx, defines the following new components for the C++ standard library:
</p>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="memory.html#optional_objects"><span class="tocnumber">1</span> <span class="toctext">optional objects</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="memory.html#class_any"><span class="tocnumber">2</span> <span class="toctext">class any</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="memory.html#string_view"><span class="tocnumber">3</span> <span class="toctext">string_view</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="memory.html#Type-erased_and_polymorphic_allocators"><span class="tocnumber">4</span> <span class="toctext">Type-erased and polymorphic allocators</span></a>
<ul>
<li class="toclevel-2 tocsection-5"><a href="memory.html#Polymorphic_allocators_and_memory_resources"><span class="tocnumber">4.1</span> <span class="toctext">Polymorphic allocators and memory resources</span></a></li>
<li class="toclevel-2 tocsection-6"><a href="memory.html#Modified_versions_of_existing_classes_to_support_type-erased_allocators"><span class="tocnumber">4.2</span> <span class="toctext">Modified versions of existing classes to support type-erased allocators</span></a></li>
<li class="toclevel-2 tocsection-7"><a href="memory.html#Convenience_aliases_for_containers_using_polymorphic_allocators"><span class="tocnumber">4.3</span> <span class="toctext">Convenience aliases for containers using polymorphic allocators</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-8"><a href="memory.html#Array_support_for_shared_ptr"><span class="tocnumber">5</span> <span class="toctext">Array support for shared_ptr</span></a></li>
<li class="toclevel-1 tocsection-9"><a href="memory.html#Sampling_and_searching_algorithms"><span class="tocnumber">6</span> <span class="toctext">Sampling and searching algorithms</span></a></li>
<li class="toclevel-1 tocsection-10"><a href="memory.html#General_utilities"><span class="tocnumber">7</span> <span class="toctext">General utilities</span></a></li>
<li class="toclevel-1 tocsection-11"><a href="memory.html#Feature_test_macros"><span class="tocnumber">8</span> <span class="toctext">Feature test macros</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=1" title="Edit section: optional objects">edit</a>]</span> <span class="mw-headline" id="optional_objects">optional objects</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/optional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="optional.html" title="cpp/experimental/optional"> <span class="t-lines"><span>optional</span></span></a></div></div>
</td>
<td> a class template representing <i>optional objects</i> <br /> <span class="t-mark">(class template)</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=2" title="Edit section: class any">edit</a>]</span> <span class="mw-headline" id="class_any"> class <code>any</code> </span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/any></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="any.html" title="cpp/experimental/any"> <span class="t-lines"><span>any</span></span></a></div></div>
</td>
<td> a type-safe container for single values of any type <br /> <span class="t-mark">(class)</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=3" title="Edit section: string view">edit</a>]</span> <span class="mw-headline" id="string_view"> <code>string_view</code> </span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/string_view></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_string_view.html" title="cpp/experimental/basic string view"> <span class="t-lines"><span>basic_string_view</span></span></a></div></div>
</td>
<td> a non-owning reference to a string <br /> <span class="t-mark">(class template)</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=4" title="Edit section: Type-erased and polymorphic allocators">edit</a>]</span> <span class="mw-headline" id="Type-erased_and_polymorphic_allocators"> Type-erased and polymorphic allocators </span></h3>
<h4><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=5" title="Edit section: Polymorphic allocators and memory resources">edit</a>]</span> <span class="mw-headline" id="Polymorphic_allocators_and_memory_resources"> Polymorphic allocators and memory resources </span></h4>
<p>The entities in this section are declared in the <span class="t-lc">std::experimental::pmr</span> namespace.
</p>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/memory_resource></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="memory_resource.html" title="cpp/experimental/memory resource"> <span class="t-lines"><span>memory_resource</span></span></a></div></div>
</td>
<td> an abstract interface for classes that encapsulate memory resources <br /> <span class="t-mark">(class)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/synchronized_pool_resource&action=edit&redlink=1" class="new" title="cpp/experimental/synchronized pool resource (page does not exist)"> <span class="t-lines"><span>synchronized_pool_resource</span></span></a></div></div>
</td>
<td> a thread-safe <span class="t-lc">memory_resource</span> for managing allocations in pools of different block sizes <br /> <span class="t-mark">(class)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/unsynchronized_pool_resource&action=edit&redlink=1" class="new" title="cpp/experimental/unsynchronized pool resource (page does not exist)"> <span class="t-lines"><span>unsynchronized_pool_resource</span></span></a></div></div>
</td>
<td> a thread-unsafe <span class="t-lc">memory_resource</span> for managing allocations in pools of different block sizes <br /> <span class="t-mark">(class)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="monotonic_buffer_resource.html" title="cpp/experimental/monotonic buffer resource"> <span class="t-lines"><span>monotonic_buffer_resource</span></span></a></div></div>
</td>
<td> a special-purpose <span class="t-lc">memory_resource</span> that releases the allocated memory only when the resource is destroyed <br /> <span class="t-mark">(class)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="polymorphic_allocator.html" title="cpp/experimental/polymorphic allocator"> <span class="t-lines"><span>polymorphic_allocator</span></span></a></div></div>
</td>
<td> an allocator that supports run-time polymorphism based on the <span class="t-lc">memory_resource</span> it is constructed with <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="resource_adaptor.html" title="cpp/experimental/resource adaptor"> <span class="t-lines"><span>resource_adaptor</span></span></a></div></div>
</td>
<td> adapts an allocator into a <span class="t-lc">memory_resource</span> <br /> <span class="t-mark">(alias template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="new_delete_resource.html" title="cpp/experimental/new delete resource"> <span class="t-lines"><span>new_delete_resource</span></span></a></div></div>
</td>
<td> returns a static program-wide <code>memory_resource</code> that uses the global <span class="t-lc"><a href="../memory/new/operator_new.html" title="cpp/memory/new/operator new">operator new</a></span> and <span class="t-lc"><a href="../memory/new/operator_delete.html" title="cpp/memory/new/operator delete">operator delete</a></span> to allocate and deallocate memory <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/pmr/dsc_new_delete_resource&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="null_memory_resource.html" title="cpp/experimental/null memory resource"> <span class="t-lines"><span>null_memory_resource</span></span></a></div></div>
</td>
<td> returns a static <code>memory_resource</code> that performs no allocation <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/pmr/dsc_null_memory_resource&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="get_default_resource.html" title="cpp/experimental/get default resource"> <span class="t-lines"><span>get_default_resource</span></span></a></div></div>
</td>
<td> gets the default <code>memory_resource</code> <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/pmr/dsc_get_default_resource&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="set_default_resource.html" title="cpp/experimental/set default resource"> <span class="t-lines"><span>set_default_resource</span></span></a></div></div>
</td>
<td> sets the default <code>memory_resource</code> <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/pmr/dsc_set_default_resource&action=edit">[edit]</a></span>
</td></tr>
</table>
<h4><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=6" title="Edit section: Modified versions of existing classes to support type-erased allocators">edit</a>]</span> <span class="mw-headline" id="Modified_versions_of_existing_classes_to_support_type-erased_allocators"> Modified versions of existing classes to support type-erased allocators </span></h4>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/functional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="function.html" title="cpp/experimental/function"> <span class="t-lines"><span>function</span></span></a></div></div>
</td>
<td> a modified version of <span class="t-lc"><a href="../utility/functional/function.html" title="cpp/utility/functional/function">std::function</a></span> with support for type-erased allocators <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/future></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="lib_extensions/promise.html" title="cpp/experimental/lib extensions/promise"> <span class="t-lines"><span>promise</span></span></a></div></div>
</td>
<td> a modified version of <span class="t-lc"><a href="../thread/promise.html" title="cpp/thread/promise">std::promise</a></span> with support for type-erased allocators <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="lib_extensions/packaged_task.html" title="cpp/experimental/lib extensions/packaged task"> <span class="t-lines"><span>packaged_task</span></span></a></div></div>
</td>
<td> a modified version of <span class="t-lc"><a href="../thread/packaged_task.html" title="cpp/thread/packaged task">std::packaged_task</a></span> with support for type-erased allocators <br /> <span class="t-mark">(class template)</span>
</td></tr>
</table>
<h4><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=7" title="Edit section: Convenience aliases for containers using polymorphic allocators">edit</a>]</span> <span class="mw-headline" id="Convenience_aliases_for_containers_using_polymorphic_allocators"> Convenience aliases for containers using polymorphic allocators </span></h4>
<p><a href="lib_extensions/pmr_container.html" title="cpp/experimental/lib extensions/pmr container">Convenience aliases and alias templates</a> for containers using polymorphic allocators are provided in the <code>std::experimental::pmr</code> namespace for the following class templates in the standard library:
</p>
<div style="margin-left:0px">
<table class="mw-collapsible mw-collapsed" style="background: transparent; text-align: left; border: 1px solid silver; margin: 0.2em auto auto; width:100%; clear: both; padding: 1px;">
<tr>
<th style="background: #F0F2F5; font-size:87%; padding:0.2em 0.3em; text-align:center;"> <span style="font-size:115%"> List of container templates for which convenience aliases are provided</span>
</th></tr>
<tr>
<td style="border: solid 1px silver; padding: 8px; background: white;">
<div class="div-col columns column-count column-count-3" style="-moz-column-count: 3; -webkit-column-count: 3; column-count: 3;">
<ul><li> <span class="t-lc"><a href="../container/vector.html" title="cpp/container/vector">std::vector</a></span>
</li><li> <span class="t-lc"><a href="../container/deque.html" title="cpp/container/deque">std::deque</a></span>
</li><li> <span class="t-lc"><a href="../container/forward_list.html" title="cpp/container/forward list">std::forward_list</a></span>
</li><li> <span class="t-lc"><a href="../container/list.html" title="cpp/container/list">std::list</a></span>
</li><li> <span class="t-lc"><a href="../string/basic_string.html" title="cpp/string/basic string">std::basic_string</a></span>
</li><li> <span class="t-lc"><a href="../container/map.html" title="cpp/container/map">std::map</a></span>
</li><li> <span class="t-lc"><a href="../container/multimap.html" title="cpp/container/multimap">std::multimap</a></span>
</li><li> <span class="t-lc"><a href="../container/set.html" title="cpp/container/set">std::set</a></span>
</li><li> <span class="t-lc"><a href="../container/multiset.html" title="cpp/container/multiset">std::multiset</a></span>
</li><li> <span class="t-lc"><a href="../regex/match_results.html" title="cpp/regex/match results">std::match_results</a></span>
</li><li> <span class="t-lc"><a href="../container/unordered_map.html" title="cpp/container/unordered map">std::unordered_map</a></span>
</li><li> <span class="t-lc"><a href="../container/unordered_multimap.html" title="cpp/container/unordered multimap">std::unordered_multimap</a></span>
</li><li> <span class="t-lc"><a href="../container/unordered_set.html" title="cpp/container/unordered set">std::unordered_set</a></span>
</li><li> <span class="t-lc"><a href="../container/unordered_multiset.html" title="cpp/container/unordered multiset">std::unordered_multiset</a></span>
</li></ul>
</div>
</td></tr></table></div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=8" title="Edit section: Array support for shared ptr">edit</a>]</span> <span class="mw-headline" id="Array_support_for_shared_ptr"> Array support for <code>shared_ptr</code> </span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/memory></code> </div>
</td></tr>
<tr class="t-dsc-hitem">
<td> Class
</td>
<td> Description
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/shared_ptr&action=edit&redlink=1" class="new" title="cpp/experimental/shared ptr (page does not exist)"> <span class="t-lines"><span>shared_ptr</span></span></a></div></div>
</td>
<td> A modified version of <span class="t-lc"><a href="../memory/shared_ptr.html" title="cpp/memory/shared ptr">std::shared_ptr</a></span> that supports arrays <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/weak_ptr&action=edit&redlink=1" class="new" title="cpp/experimental/weak ptr (page does not exist)"> <span class="t-lines"><span>weak_ptr</span></span></a></div></div>
</td>
<td> A modified version of <span class="t-lc"><a href="../memory/weak_ptr.html" title="cpp/memory/weak ptr">std::weak_ptr</a></span> that supports arrays <br /> <span class="t-mark">(class template)</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=9" title="Edit section: Sampling and searching algorithms">edit</a>]</span> <span class="mw-headline" id="Sampling_and_searching_algorithms">Sampling and searching algorithms</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/algorithm></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="sample.html" title="cpp/experimental/sample"> <span class="t-lines"><span>sample</span></span></a></div></div>
</td>
<td> selects n random elements from a sequence <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="search.html" title="cpp/experimental/search"> <span class="t-lines"><span>search</span></span></a></div></div>
</td>
<td> applies a Searcher to a sequence <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/functional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="default_searcher.html" title="cpp/experimental/default searcher"> <span class="t-lines"><span>default_searcher</span></span></a></div></div>
</td>
<td> standard C++ library search algorithm implementation <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="default_searcher.html" title="cpp/experimental/default searcher"> <span class="t-lines"><span>make_default_searcher</span></span></a></div></div>
</td>
<td> helper function to create a default_searcher <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="boyer_moore_searcher.html" title="cpp/experimental/boyer moore searcher"> <span class="t-lines"><span>boyer_moore_searcher</span></span></a></div></div>
</td>
<td> Boyer-Moore search algorithm implementation <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="boyer_moore_searcher.html" title="cpp/experimental/boyer moore searcher"> <span class="t-lines"><span>make_boyer_moore_searcher</span></span></a></div></div>
</td>
<td> helper function to create a boyer_moore_searcher <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="boyer_moore_horspool_searcher.html" title="cpp/experimental/boyer moore horspool searcher"> <span class="t-lines"><span>boyer_moore_horspool_searcher</span></span></a></div></div>
</td>
<td> Boyer-Moore-Horspool search algorithm implementation <br /> <span class="t-mark">(class template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="boyer_moore_horspool_searcher.html" title="cpp/experimental/boyer moore horspool searcher"> <span class="t-lines"><span>make_boyer_moore_horspool_searcher</span></span></a></div></div>
</td>
<td> helper function to create a boyer_moore_horspool_searcher <br /> <span class="t-mark">(function template)</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=10" title="Edit section: General utilities">edit</a>]</span> <span class="mw-headline" id="General_utilities">General utilities</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/utility></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="erased_type.html" title="cpp/experimental/erased type"> <span class="t-lines"><span>erased_type</span></span></a></div></div>
</td>
<td> placeholder type for type erasure, such as in allocators <br /> <span class="t-mark">(class)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/tuple></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="apply.html" title="cpp/experimental/apply"> <span class="t-lines"><span>apply</span></span></a></div></div>
</td>
<td> calls a function to a tuple of arguments <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/type_traits></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="invocation_type.html" title="cpp/experimental/invocation type"> <span class="t-lines"><span>invocation_type</span><span>raw_invocation_type</span></span></a></div></div>
</td>
<td> deduce the implied function type of the callable object when called with the given argument types <br /> <span class="t-mark">(class template)</span>
</td></tr>
</table>
<p>In addition, the TS provides <a href="type_trait_variable_templates.html" title="cpp/experimental/type trait variable templates">numerous <code>constexpr</code> variable templates</a> for the following type traits and other class templates in the standard library:
</p>
<div style="margin-left:0px">
<table class="mw-collapsible mw-collapsed" style="background: transparent; text-align: left; border: 1px solid silver; margin: 0.2em auto auto; width:100%; clear: both; padding: 1px;">
<tr>
<th style="background: #F0F2F5; font-size:87%; padding:0.2em 0.3em; text-align:center;"> <span style="font-size:115%"> List of type traits and other class templates for which variable templates are provided</span>
</th></tr>
<tr>
<td style="border: solid 1px silver; padding: 8px; background: white;">
<div class="div-col columns column-count column-count-2" style="-moz-column-count: 2; -webkit-column-count: 2; column-count: 2;">
<ul><li> <span class="t-lc"><a href="../types/is_void.html" title="cpp/types/is void">std::is_void</a></span>
</li><li> <span class="t-lc"><a href="../types/is_null_pointer.html" title="cpp/types/is null pointer">std::is_null_pointer</a></span>
</li><li> <span class="t-lc"><a href="../types/is_integral.html" title="cpp/types/is integral">std::is_integral</a></span>
</li><li> <span class="t-lc"><a href="../types/is_floating_point.html" title="cpp/types/is floating point">std::is_floating_point</a></span>
</li><li> <span class="t-lc"><a href="../types/is_array.html" title="cpp/types/is array">std::is_array</a></span>
</li><li> <span class="t-lc"><a href="../types/is_pointer.html" title="cpp/types/is pointer">std::is_pointer</a></span>
</li><li> <span class="t-lc"><a href="../types/is_lvalue_reference.html" title="cpp/types/is lvalue reference">std::is_lvalue_reference</a></span>
</li><li> <span class="t-lc"><a href="../types/is_rvalue_reference.html" title="cpp/types/is rvalue reference">std::is_rvalue_reference</a></span>
</li><li> <span class="t-lc"><a href="../types/is_member_object_pointer.html" title="cpp/types/is member object pointer">std::is_member_object_pointer</a></span>
</li><li> <span class="t-lc"><a href="../types/is_member_function_pointer.html" title="cpp/types/is member function pointer">std::is_member_function_pointer</a></span>
</li><li> <span class="t-lc"><a href="../types/is_enum.html" title="cpp/types/is enum">std::is_enum</a></span>
</li><li> <span class="t-lc"><a href="../types/is_union.html" title="cpp/types/is union">std::is_union</a></span>
</li><li> <span class="t-lc"><a href="../types/is_class.html" title="cpp/types/is class">std::is_class</a></span>
</li><li> <span class="t-lc"><a href="../types/is_function.html" title="cpp/types/is function">std::is_function</a></span>
</li><li> <span class="t-lc"><a href="../types/is_reference.html" title="cpp/types/is reference">std::is_reference</a></span>
</li><li> <span class="t-lc"><a href="../types/is_arithmetic.html" title="cpp/types/is arithmetic">std::is_arithmetic</a></span>
</li><li> <span class="t-lc"><a href="../types/is_fundamental.html" title="cpp/types/is fundamental">std::is_fundamental</a></span>
</li><li> <span class="t-lc"><a href="../types/is_object.html" title="cpp/types/is object">std::is_object</a></span>
</li><li> <span class="t-lc"><a href="../types/is_scalar.html" title="cpp/types/is scalar">std::is_scalar</a></span>
</li><li> <span class="t-lc"><a href="../types/is_compound.html" title="cpp/types/is compound">std::is_compound</a></span>
</li><li> <span class="t-lc"><a href="../types/is_member_pointer.html" title="cpp/types/is member pointer">std::is_member_pointer</a></span>
</li><li> <span class="t-lc"><a href="../types/is_const.html" title="cpp/types/is const">std::is_const</a></span>
</li><li> <span class="t-lc"><a href="../types/is_volatile.html" title="cpp/types/is volatile">std::is_volatile</a></span>
</li><li> <span class="t-lc"><a href="../types/is_trivial.html" title="cpp/types/is trivial">std::is_trivial</a></span>
</li><li> <span class="t-lc"><a href="../types/is_trivially_copyable.html" title="cpp/types/is trivially copyable">std::is_trivially_copyable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_standard_layout.html" title="cpp/types/is standard layout">std::is_standard_layout</a></span>
</li><li> <span class="t-lc"><a href="../types/is_pod.html" title="cpp/types/is pod">std::is_pod</a></span>
</li><li> <span class="t-lc"><a href="../types/is_literal_type.html" title="cpp/types/is literal type">std::is_literal_type</a></span>
</li><li> <span class="t-lc"><a href="../types/is_empty.html" title="cpp/types/is empty">std::is_empty</a></span>
</li><li> <span class="t-lc"><a href="../types/is_polymorphic.html" title="cpp/types/is polymorphic">std::is_polymorphic</a></span>
</li><li> <span class="t-lc"><a href="../types/is_abstract.html" title="cpp/types/is abstract">std::is_abstract</a></span>
</li><li> <span class="t-lc"><a href="../types/is_final.html" title="cpp/types/is final">std::is_final</a></span>
</li><li> <span class="t-lc"><a href="../types/is_signed.html" title="cpp/types/is signed">std::is_signed</a></span>
</li><li> <span class="t-lc"><a href="../types/is_unsigned.html" title="cpp/types/is unsigned">std::is_unsigned</a></span>
</li><li> <span class="t-lc"><a href="../types/is_constructible.html" title="cpp/types/is constructible">std::is_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_constructible.html" title="cpp/types/is constructible">std::is_trivially_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_constructible.html" title="cpp/types/is constructible">std::is_nothrow_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_default_constructible.html" title="cpp/types/is default constructible">std::is_default_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_default_constructible.html" title="cpp/types/is default constructible">std::is_trivially_default_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_default_constructible.html" title="cpp/types/is default constructible">std::is_nothrow_default_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_constructible.html" title="cpp/types/is copy constructible">std::is_copy_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_constructible.html" title="cpp/types/is copy constructible">std::is_trivially_copy_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_constructible.html" title="cpp/types/is copy constructible">std::is_nothrow_copy_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_constructible.html" title="cpp/types/is move constructible">std::is_move_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_constructible.html" title="cpp/types/is move constructible">std::is_trivially_move_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_constructible.html" title="cpp/types/is move constructible">std::is_nothrow_move_constructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_assignable.html" title="cpp/types/is assignable">std::is_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_assignable.html" title="cpp/types/is assignable">std::is_trivially_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_assignable.html" title="cpp/types/is assignable">std::is_nothrow_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_assignable.html" title="cpp/types/is copy assignable">std::is_copy_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_assignable.html" title="cpp/types/is copy assignable">std::is_trivially_copy_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_copy_assignable.html" title="cpp/types/is copy assignable">std::is_nothrow_copy_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_assignable.html" title="cpp/types/is move assignable">std::is_move_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_assignable.html" title="cpp/types/is move assignable">std::is_trivially_move_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_move_assignable.html" title="cpp/types/is move assignable">std::is_nothrow_move_assignable</a></span>
</li><li> <span class="t-lc"><a href="../types/is_destructible.html" title="cpp/types/is destructible">std::is_destructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_destructible.html" title="cpp/types/is destructible">std::is_trivially_destructible</a></span>
</li><li> <span class="t-lc"><a href="../types/is_destructible.html" title="cpp/types/is destructible">std::is_nothrow_destructible</a></span>
</li><li> <span class="t-lc"><a href="../types/has_virtual_destructor.html" title="cpp/types/has virtual destructor">std::has_virtual_destructor</a></span>
</li><li> <span class="t-lc"><a href="../types/alignment_of.html" title="cpp/types/alignment of">std::alignment_of</a></span>
</li><li> <span class="t-lc"><a href="../types/rank.html" title="cpp/types/rank">std::rank</a></span>
</li><li> <span class="t-lc"><a href="../types/extent.html" title="cpp/types/extent">std::extent</a></span>
</li><li> <span class="t-lc"><a href="../types/is_same.html" title="cpp/types/is same">std::is_same</a></span>
</li><li> <span class="t-lc"><a href="../types/is_base_of.html" title="cpp/types/is base of">std::is_base_of</a></span>
</li><li> <span class="t-lc"><a href="../types/is_convertible.html" title="cpp/types/is convertible">std::is_convertible</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_equal.html" title="cpp/numeric/ratio/ratio equal">std::ratio_equal</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_not_equal.html" title="cpp/numeric/ratio/ratio not equal">std::ratio_not_equal</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_less.html" title="cpp/numeric/ratio/ratio less">std::ratio_less</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_less_equal.html" title="cpp/numeric/ratio/ratio less equal">std::ratio_less_equal</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_greater.html" title="cpp/numeric/ratio/ratio greater">std::ratio_greater</a></span>
</li><li> <span class="t-lc"><a href="../numeric/ratio/ratio_greater_equal.html" title="cpp/numeric/ratio/ratio greater equal">std::ratio_greater_equal</a></span>
</li><li> <span class="t-lc">std::tuple_size</span>
</li><li> <span class="t-lc"><a href="../chrono/treat_as_floating_point.html" title="cpp/chrono/treat as floating point">std::chrono::treat_as_floating_point</a></span>
</li><li> <span class="t-lc"><a href="../error/error_code/is_error_code_enum.html" title="cpp/error/error code/is error code enum">std::is_error_code_enum</a></span>
</li><li> <span class="t-lc"><a href="../error/error_condition/is_error_condition_enum.html" title="cpp/error/error condition/is error condition enum">std::is_error_condition_enum</a></span>
</li><li> <span class="t-lc"><a href="../utility/functional/is_bind_expression.html" title="cpp/utility/functional/is bind expression">std::is_bind_expression</a></span>
</li><li> <span class="t-lc"><a href="../utility/functional/is_placeholder.html" title="cpp/utility/functional/is placeholder">std::is_placeholder</a></span>
</li><li> <span class="t-lc"><a href="../memory/uses_allocator.html" title="cpp/memory/uses allocator">std::uses_allocator</a></span>
</li></ul>
</div>
</td></tr></table></div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/lib_extensions&action=edit&section=11" title="Edit section: Feature test macros">edit</a>]</span> <span class="mw-headline" id="Feature_test_macros">Feature test macros</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/optional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_optional</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201411</span></span></span> indicates that the optional type is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/any></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_any</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201411</span></span></span> indicates that the any type is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/string_view></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_string_view</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201411</span></span></span> indicates that basic_string_view template is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/tuple></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_apply</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201402</span></span></span> indicates that the tuple apply() function is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/type_traits></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_type_trait_variable_templates</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201402</span></span></span> indicates that variable template type traits are supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/type_traits></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_invocation_type</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201406</span></span></span> indicates that invocation type traits are supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/functional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_boyer_moore_searching</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201411</span></span></span> indicates that additional searching algorithms are supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/functional></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_function_erased_allocator</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201406</span></span></span> indicates that type-erased allocator for std::function is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/future></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_promise_erased_allocator</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201406</span></span></span> indicates that type-erased allocator for std::promise is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/future></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_packaged_task_erased_allocator</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201406</span></span></span> indicates that type-erased allocator for std::packaged_task is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/memory></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_shared_ptr_arrays</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201406</span></span></span> indicates that shared_ptr arrays are supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/memory_resource></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_memory_resources</span></span></div></div>
</td>
<td> a value of at least <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201402</span></span></span> indicates that polymorphic memory resources are supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><experimental/algorithm></code> </div>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><span class="t-lines"><span>__cpp_lib_experimental_sample</span></span></div></div>
</td>
<td> a value of <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">201402</span></span></span> indicates that the sample algorithm is supported <br /> <span class="t-mark">(macro constant)</span>
</td></tr>
</table>
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