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<div class="refentry">
<a name="boost.xpressive.regex_compiler"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template regex_compiler</span></h2>
<p>boost::xpressive::regex_compiler &#8212; Class template <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> is a factory for building <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> objects from a string. </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.regex_compiler_hpp" title="Header &lt;boost/xpressive/regex_compiler.hpp&gt;">boost/xpressive/regex_compiler.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiIter<span class="special">,</span> <span class="keyword">typename</span> RegexTraits<span class="special">,</span> <span class="keyword">typename</span> CompilerTraits<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">BidiIter</span>                            <a name="boost.xpressive.regex_compiler.iterator_type"></a><span class="identifier">iterator_type</span><span class="special">;</span>  
  <span class="keyword">typedef</span> <span class="identifier">iterator_value</span><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>    <a name="boost.xpressive.regex_compiler.char_type"></a><span class="identifier">char_type</span><span class="special">;</span>      
  <span class="keyword">typedef</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">syntax_option_type</span> <a name="boost.xpressive.regex_compiler.flag_type"></a><span class="identifier">flag_type</span><span class="special">;</span>      
  <span class="keyword">typedef</span> <span class="identifier">RegexTraits</span>                         <a name="boost.xpressive.regex_compiler.traits_type"></a><span class="identifier">traits_type</span><span class="special">;</span>    
  <span class="keyword">typedef</span> <span class="identifier">traits_type</span><span class="special">::</span><span class="identifier">string_type</span>            <a name="boost.xpressive.regex_compiler.string_type"></a><span class="identifier">string_type</span><span class="special">;</span>    
  <span class="keyword">typedef</span> <span class="identifier">traits_type</span><span class="special">::</span><span class="identifier">locale_type</span>            <a name="boost.xpressive.regex_compiler.locale_type"></a><span class="identifier">locale_type</span><span class="special">;</span>    
  <span class="keyword">typedef</span> <span class="identifier">traits_type</span><span class="special">::</span><span class="identifier">char_class_type</span>        <a name="boost.xpressive.regex_compiler.char_class_type"></a><span class="identifier">char_class_type</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="regex_compiler.html#boost.xpressive.regex_compilerconstruct-copy-destruct">construct/copy/destruct</a></span>
  <span class="keyword">explicit</span> <a class="link" href="regex_compiler.html#idp163757656-bb"><span class="identifier">regex_compiler</span></a><span class="special">(</span><span class="identifier">RegexTraits</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">RegexTraits</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="regex_compiler.html#idp163737960-bb">public member functions</a></span>
  <span class="identifier">locale_type</span> <a class="link" href="regex_compiler.html#idp163738168-bb"><span class="identifier">imbue</span></a><span class="special">(</span><span class="identifier">locale_type</span><span class="special">)</span><span class="special">;</span>
  <span class="identifier">locale_type</span> <a class="link" href="regex_compiler.html#idp163740568-bb"><span class="identifier">getloc</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputIter<span class="special">&gt;</span> 
    <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
    <a class="link" href="regex_compiler.html#idp163742392-bb"><span class="identifier">compile</span></a><span class="special">(</span><span class="identifier">InputIter</span><span class="special">,</span> <span class="identifier">InputIter</span><span class="special">,</span> <span class="identifier">flag_type</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputRange<span class="special">&gt;</span> 
    <span class="identifier">disable_if</span><span class="special">&lt;</span> <span class="identifier">is_pointer</span><span class="special">&lt;</span> <span class="identifier">InputRange</span> <span class="special">&gt;</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
    <a class="link" href="regex_compiler.html#idp163747944-bb"><span class="identifier">compile</span></a><span class="special">(</span><span class="identifier">InputRange</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">flag_type</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
  <a class="link" href="regex_compiler.html#idp163750280-bb"><span class="identifier">compile</span></a><span class="special">(</span><span class="identifier">char_type</span> <span class="keyword">const</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">flag_type</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <a class="link" href="regex_compiler.html#idp163752072-bb"><span class="identifier">compile</span></a><span class="special">(</span><span class="identifier">char_type</span> <span class="keyword">const</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">flag_type</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <a class="link" href="regex_compiler.html#idp163754040-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> <a class="link" href="regex_compiler.html#idp163756344-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="regex_compiler.html#idp163758344-bb">private member functions</a></span>
  <span class="keyword">bool</span> <a class="link" href="regex_compiler.html#idp163758552-bb"><span class="identifier">is_upper_</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp256631320"></a><h2>Description</h2>
<p>Class template <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> is used to construct a <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> object from a string. The string should contain a valid regular expression. You can imbue a <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> object with a locale, after which all <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> objects created with that <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> object will use that locale. After creating a <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> object, and optionally imbueing it with a locale, you can call the compile() method to construct a <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> object, passing it the string representing the regular expression. You can call compile() multiple times on the same <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a> object. Two <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> objects compiled from the same string will have different regex_id's. </p>
<div class="refsect2">
<a name="idp256636184"></a><h3>
<a name="boost.xpressive.regex_compilerconstruct-copy-destruct"></a><code class="computeroutput">regex_compiler</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">explicit</span> <a name="idp163757656-bb"></a><span class="identifier">regex_compiler</span><span class="special">(</span><span class="identifier">RegexTraits</span> <span class="keyword">const</span> <span class="special">&amp;</span> traits <span class="special">=</span> <span class="identifier">RegexTraits</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span></pre></li></ol></div>
</div>
<div class="refsect2">
<a name="idp256641576"></a><h3>
<a name="idp163737960-bb"></a><code class="computeroutput">regex_compiler</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="identifier">locale_type</span> <a name="idp163738168-bb"></a><span class="identifier">imbue</span><span class="special">(</span><span class="identifier">locale_type</span> loc<span class="special">)</span><span class="special">;</span></pre>
<p>Specify the locale to be used by a <code class="computeroutput"><a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a></code>.</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">loc</code></span></p></td>
<td><p>The locale that this <code class="computeroutput"><a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a></code> should use. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>The previous locale. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">locale_type</span> <a name="idp163740568-bb"></a><span class="identifier">getloc</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Get the locale used by a <code class="computeroutput"><a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a></code>.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>The locale used by this <a class="link" href="regex_compiler.html" title="Struct template regex_compiler">regex_compiler</a>. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputIter<span class="special">&gt;</span> 
  <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
  <a name="idp163742392-bb"></a><span class="identifier">compile</span><span class="special">(</span><span class="identifier">InputIter</span> begin<span class="special">,</span> <span class="identifier">InputIter</span> end<span class="special">,</span> 
          <span class="identifier">flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span></pre>
<p>Builds a <code class="computeroutput"><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a></code> object from a range of characters.</p>
<p>



</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">begin</code></span></p></td>
<td><p>The beginning of a range of characters representing the regular expression to compile. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of a range of characters representing the regular expression to compile. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">flags</code></span></p></td>
<td><p>Optional bitmask that determines how the pat string is interpreted. (See syntax_option_type.) </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td>
<p>InputIter is a model of the InputIterator concept. </p>
<p>[begin,end) is a valid range. </p>
<p>The range of characters specified by [begin,end) contains a valid string-based representation of a regular expression. </p>
</td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a> object corresponding to the regular expression represented by the character range. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>
<a class="link" href="regex_error.html" title="Struct regex_error">regex_error</a> when the range of characters has invalid regular expression syntax. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputRange<span class="special">&gt;</span> 
  <span class="identifier">disable_if</span><span class="special">&lt;</span> <span class="identifier">is_pointer</span><span class="special">&lt;</span> <span class="identifier">InputRange</span> <span class="special">&gt;</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
  <a name="idp163747944-bb"></a><span class="identifier">compile</span><span class="special">(</span><span class="identifier">InputRange</span> <span class="keyword">const</span> <span class="special">&amp;</span> pat<span class="special">,</span> 
          <span class="identifier">flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
<a name="idp163750280-bb"></a><span class="identifier">compile</span><span class="special">(</span><span class="identifier">char_type</span> <span class="keyword">const</span> <span class="special">*</span> begin<span class="special">,</span> 
        <span class="identifier">flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> 
<a name="idp163752072-bb"></a><span class="identifier">compile</span><span class="special">(</span><span class="identifier">char_type</span> <span class="keyword">const</span> <span class="special">*</span> begin<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> size<span class="special">,</span> <span class="identifier">flag_type</span> flags<span class="special">)</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <a name="idp163754040-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">)</span><span class="special">;</span></pre>
<p>Return a reference to the named regular expression. If no such named regular expression exists, create a new regular expression and return a reference to it.</p>
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<td><p><span class="term">Parameters:</span></p></td>
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<td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
<td><p>A std::string containing the name of the regular expression. </p></td>
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<td><p><span class="term">Requires:</span></p></td>
<td><p>The string is not empty. </p></td>
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<td><p><span class="term">Throws:</span></p></td>
<td>bad_alloc on allocation failure. </td>
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<pre class="literallayout"><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> <a name="idp163756344-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
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<a name="idp256703528"></a><h3>
<a name="idp163758344-bb"></a><code class="computeroutput">regex_compiler</code> private member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idp163758552-bb"></a><span class="identifier">is_upper_</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li></ol></div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 Eric Niebler<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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