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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_token_iterator.html" title="cpp/regex/regex token iterator"><span class="t-lines"><span>regex_token_iterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="regex_traits.html" title="cpp/regex/regex traits"><span class="t-lines"><span>regex_traits</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Constants</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="syntax_option_type.html" title="cpp/regex/syntax option type"><span class="t-lines"><span>syntax_option_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="match_flag_type.html" title="cpp/regex/match flag type"><span class="t-lines"><span>match_flag_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="error_type.html" title="cpp/regex/error type"><span class="t-lines"><span>error_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Regex Grammar</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ecmascript.html" title="cpp/regex/ecmascript"><span class="t-lines"><span>Modified ECMAScript-262</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></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/regex/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"><tt>std::basic_regex</tt></strong><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> Member Functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/basic_regex.html" title="cpp/regex/basic regex/basic regex"><span class="t-lines"><span>basic_regex::basic_regex</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/~basic_regex.html" title="cpp/regex/basic regex/~basic regex"><span class="t-lines"><span>basic_regex::~basic_regex</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/operator=.html" title="cpp/regex/basic regex/operator="><span class="t-lines"><span>basic_regex::operator=</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/assign.html" title="cpp/regex/basic regex/assign"><span class="t-lines"><span>basic_regex::assign</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Observers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/mark_count.html" title="cpp/regex/basic regex/mark count"><span class="t-lines"><span>basic_regex::mark_count</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/flags.html" title="cpp/regex/basic regex/flags"><span class="t-lines"><span>basic_regex::flags</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Locale</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/getloc.html" title="cpp/regex/basic regex/getloc"><span class="t-lines"><span>basic_regex::getloc</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/imbue.html" title="cpp/regex/basic regex/imbue"><span class="t-lines"><span>basic_regex::imbue</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Modifiers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/swap.html" title="cpp/regex/basic regex/swap"><span class="t-lines"><span>basic_regex::swap</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Constants</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/constants.html" title="cpp/regex/basic regex/constants"><span class="t-lines"><span>basic_regex constants</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Non-member Functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_regex/swap2.html" title="cpp/regex/basic regex/swap2"><span class="t-lines"><span>swap<span class="t-dsc-small">(std::basic_regex)</span></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/regex/basic_regex/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>Defined in header <code><a href="../header/regex.html" title="cpp/header/regex"><regex></a></code>
</div></td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span><br />
<p>    <span class="kw1">class</span> CharT,<br />
    <span class="kw1">class</span> Traits <span class="sy1">=</span> <a href="regex_traits.html"><span class="kw1747">std::<span class="me2">regex_traits</span></span></a><span class="sy1"><</span>CharT<span class="sy1">></span><br />
</p>
<span class="sy1">></span> <span class="kw1">class</span> basic_regex<span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>The class template <code>basic_regex</code> provides a general framework for holding regular expressions.
</p><p>Several specializations for common character types are provided:
</p>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code><regex></code> </div>
</td></tr>
<tr class="t-dsc-hitem">
<td> Type
</td>
<td> Definition
</td></tr>
<tr class="t-dsc">
<td> <code>regex</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy1"><</span><span class="kw4">char</span><span class="sy1">></span></span></span>
</td></tr>
<tr class="t-dsc">
<td> <code>wregex</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy1"><</span><span class="kw4">wchar_t</span><span class="sy1">></span></span></span>
</td></tr>
</table>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="basic_regex.html#Member_types"><span class="tocnumber">1</span> <span class="toctext">Member types</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="basic_regex.html#Member_functions"><span class="tocnumber">2</span> <span class="toctext">Member functions</span></a>
<ul>
<li class="toclevel-2"><a href="basic_regex.html#Observers"><span class="tocnumber">2.1</span> <span class="toctext">Observers</span></a></li>
<li class="toclevel-2"><a href="basic_regex.html#Locale"><span class="tocnumber">2.2</span> <span class="toctext">Locale</span></a></li>
<li class="toclevel-2"><a href="basic_regex.html#Modifiers"><span class="tocnumber">2.3</span> <span class="toctext">Modifiers</span></a></li>
</ul>
</li>
<li class="toclevel-1"><a href="basic_regex.html#Constants"><span class="tocnumber">3</span> <span class="toctext">Constants</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="basic_regex.html#Non-member_functions"><span class="tocnumber">4</span> <span class="toctext">Non-member functions</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/regex/basic_regex&action=edit&section=1" title="Edit section: Member types">edit</a>]</span> <span class="mw-headline" id="Member_types">Member types</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-hitem">
<td> Member type
</td>
<td> Definition
</td></tr>
<tr class="t-dsc">
<td> <code>value_type</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">CharT</span></span>
</td></tr>
<tr class="t-dsc">
<td> <code>traits_type</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">Traits</span></span>
</td></tr>
<tr class="t-dsc">
<td> <code>string_type</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">Traits<span class="sy4">::</span><span class="me2">string_type</span></span></span>
</td></tr>
<tr class="t-dsc">
<td> <code>locale_type</code>
</td>
<td> <span class="t-c"><span class="mw-geshi cpp source-cpp">Traits<span class="sy4">::</span><span class="me2">locale_type</span></span></span>
</td></tr>
<tr class="t-dsc">
<td> <code>flag_type</code>
</td>
<td> <span class="t-lc">std::regex_constants::syntax_option_type</span>
</td></tr>
</table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/regex/basic_regex&action=edit&section=2" title="Edit section: Member functions">edit</a>]</span> <span class="mw-headline" id="Member_functions">Member functions</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div t-dsc-member-nobold-div"><div><a href="basic_regex/basic_regex.html" title="cpp/regex/basic regex/basic regex"> <span class="t-lines"><span>(constructor)</span></span></a></div></div>
</td>
<td> constructs the regex object <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_constructor&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div t-dsc-member-nobold-div"><div><a href="basic_regex/~basic_regex.html" title="cpp/regex/basic regex/~basic regex"> <span class="t-lines"><span>(destructor)</span></span></a></div></div>
</td>
<td> destructs the regex object <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_destructor&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/operator=.html" title="cpp/regex/basic regex/operator="> <span class="t-lines"><span>operator=</span></span></a></div></div>
</td>
<td> assigns the contents <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_operator%3D&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/assign.html" title="cpp/regex/basic regex/assign"> <span class="t-lines"><span>assign</span></span></a></div></div>
</td>
<td> assigns the contents <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_assign&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Observers"> Observers </span></h5>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/mark_count.html" title="cpp/regex/basic regex/mark count"> <span class="t-lines"><span>mark_count</span></span></a></div></div>
</td>
<td> returns the number of marked sub-expressions within the regular expression <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_mark_count&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/flags.html" title="cpp/regex/basic regex/flags"> <span class="t-lines"><span>flags</span></span></a></div></div>
</td>
<td> returns the syntax flags <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_flags&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Locale"> Locale </span></h5>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/getloc.html" title="cpp/regex/basic regex/getloc"> <span class="t-lines"><span>getloc</span></span></a></div></div>
</td>
<td> get locale information <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_getloc&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/imbue.html" title="cpp/regex/basic regex/imbue"> <span class="t-lines"><span>imbue</span></span></a></div></div>
</td>
<td> set locale information <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_imbue&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Modifiers"> Modifiers </span></h5>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/swap.html" title="cpp/regex/basic regex/swap"> <span class="t-lines"><span>swap</span></span></a></div></div>
</td>
<td> swaps the contents <br /> <span class="t-mark">(public member 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/regex/basic_regex/dsc_swap&action=edit">[edit]</a></span>
</td></tr>
<tr>
<td colspan="2"> <h3> <span class="mw-headline" id="Constants"> Constants</span></h3>
</td></tr>
<table class="t-dsc-begin">
<tr class="t-dsc-hitem">
<td> Value
</td>
<td> Effect(s)
</td></tr>
<tr class="t-dsc">
<td> <code>icase</code>
</td>
<td> Character matching should be performed without regard to case.
</td></tr>
<tr class="t-dsc">
<td> <code>nosubs</code>
</td>
<td> When performing matches, all marked sub-expressions <code><b>(<span class="t-spar">expr</span>)</b></code> are treated as non-marking sub-expressions <code><b>(?:<span class="t-spar">expr</span>)</b></code>. No matches are stored in the supplied <span class="t-lc">std::regex_match</span> structure and <code>mark_count()</code> is zero
</td></tr>
<tr class="t-dsc">
<td> <code>optimize</code>
</td>
<td> Instructs the regular expression engine to make matching faster, with the potential cost of making construction slower. For example, this might mean converting a non-deterministic FSA to a deterministic FSA.
</td></tr>
<tr class="t-dsc">
<td> <code>collate</code>
</td>
<td> Character ranges of the form <i>"[a-b]"</i> will be locale sensitive.
</td></tr>
<tr class="t-dsc">
<td> <code>ECMAScript</code>
</td>
<td> Use the <a href="ecmascript.html" title="cpp/regex/ecmascript">Modified ECMAScript regular expression grammar</a>
</td></tr>
<tr class="t-dsc">
<td> <code>basic</code>
</td>
<td> Use the basic POSIX regular expression grammar (<a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03">grammar documentation</a>).
</td></tr>
<tr class="t-dsc">
<td> <code>extended</code>
</td>
<td> Use the extended POSIX regular expression grammar (<a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04">grammar documentation</a>).
</td></tr>
<tr class="t-dsc">
<td> <code>awk</code>
</td>
<td> Use the regular expression grammar used by the <i>awk</i> utility in POSIX (<a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html#tag_20_06_13_04">grammar documentation</a>)
</td></tr>
<tr class="t-dsc">
<td> <code>grep</code>
</td>
<td> Use the regular expression grammar used by the <i>grep</i> utility in POSIX. This is effectively the same as the <code>basic</code> option with the addition of newline '\n' as an alternation separator.
</td></tr>
<tr class="t-dsc">
<td> <code>egrep</code>
</td>
<td> Use the regular expression grammar used by the <i>grep</i> utility, with the <i>-E</i> option, in POSIX. This is effectively the same as the <code>extended</code> option with the addition of newline '\n' as an alternation separator in addtion to '|'.
</td></tr>
</table>
<p>At most one grammar option must be chosen out of <code>ECMAScript</code>, <code>basic</code>, <code>extended</code>, <code>awk</code>, <code>grep</code>, <code>egrep</code>. If no grammar is chosen, <code>ECMAScript</code> is assumed to be selected. The other options serve as modifiers, such that <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">regex</span><span class="br0">(</span><span class="st0">"meow"</span>, std<span class="sy4">::</span><span class="me2">regex</span><span class="sy4">::</span><span class="me2">icase</span><span class="br0">)</span></span></span> is equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">regex</span><span class="br0">(</span><span class="st0">"meow"</span>, std<span class="sy4">::</span><span class="me2">regex</span><span class="sy4">::</span><span class="me2">ECMAScript</span><span class="sy3">|</span>std<span class="sy4">::</span><span class="me2">regex</span><span class="sy4">::</span><span class="me2">icase</span><span class="br0">)</span></span></span>
</p>
</table>
<p>The member constants in <code>basic_regex</code> are duplicates of the <a href="syntax_option_type.html" title="cpp/regex/syntax option type">syntax_option_type</a> constants defined in the namespace <code>std::regex_constants</code>.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/regex/basic_regex&action=edit&section=3" title="Edit section: Non-member functions">edit</a>]</span> <span class="mw-headline" id="Non-member_functions">Non-member functions</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="basic_regex/swap2.html" title="cpp/regex/basic regex/swap2"> <span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_regex)</span></span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td> specializes the <span class="t-lc">std::swap</span> algorithm <br /> <span class="t-mark">(function template)</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/regex/basic_regex/dsc_swap2&action=edit">[edit]</a></span>
</td></tr>
</table>
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