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<a name="boost.xpressive.regex_replace"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Function regex_replace</span></h2>
<p>boost::xpressive::regex_replace &#8212; Build an output sequence given an input sequence, a regex, and a format string or a formatter object, function, or expression. </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_algorithms_hpp" title="Header &lt;boost/xpressive/regex_algorithms.hpp&gt;">boost/xpressive/regex_algorithms.hpp</a>&gt;

</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutIter<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">,</span> <span class="keyword">typename</span> Formatter<span class="special">&gt;</span> 
  <span class="identifier">OutIter</span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">OutIter</span> out<span class="special">,</span> <span class="identifier">BidiIter</span> begin<span class="special">,</span> <span class="identifier">BidiIter</span> end<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> re<span class="special">,</span> 
                        <span class="identifier">Formatter</span> <span class="keyword">const</span> <span class="special">&amp;</span> format<span class="special">,</span> 
                        <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                        <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutIter<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">&gt;</span> 
  <span class="identifier">OutIter</span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">OutIter</span> out<span class="special">,</span> <span class="identifier">BidiIter</span> begin<span class="special">,</span> <span class="identifier">BidiIter</span> end<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> re<span class="special">,</span> 
                        <span class="keyword">typename</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> <span class="keyword">const</span> <span class="special">*</span> format<span class="special">,</span> 
                        <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiContainer<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">,</span> <span class="keyword">typename</span> Formatter<span class="special">&gt;</span> 
  <span class="identifier">BidiContainer</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">BidiContainer</span> <span class="special">&amp;</span> str<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> re<span class="special">,</span> 
                <span class="identifier">Formatter</span> <span class="keyword">const</span> <span class="special">&amp;</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiContainer<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">,</span> <span class="keyword">typename</span> Formatter<span class="special">&gt;</span> 
  <span class="identifier">BidiContainer</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">BidiContainer</span> <span class="keyword">const</span> <span class="special">&amp;</span> str<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> re<span class="special">,</span> 
                <span class="identifier">Formatter</span> <span class="keyword">const</span> <span class="special">&amp;</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Char<span class="special">,</span> <span class="keyword">typename</span> Formatter<span class="special">&gt;</span> 
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">remove_const</span><span class="special">&lt;</span> <span class="identifier">Char</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">&gt;</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">Char</span> <span class="special">*</span> str<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">Char</span> <span class="special">*</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> re<span class="special">,</span> 
                <span class="identifier">Formatter</span> <span class="keyword">const</span> <span class="special">&amp;</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiContainer<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">&gt;</span> 
  <span class="identifier">BidiContainer</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">BidiContainer</span> <span class="special">&amp;</span> str<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> re<span class="special">,</span> 
                <span class="keyword">typename</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> <span class="keyword">const</span> <span class="special">*</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> BidiContainer<span class="special">,</span> <span class="keyword">typename</span> BidiIter<span class="special">&gt;</span> 
  <span class="identifier">BidiContainer</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">BidiContainer</span> <span class="keyword">const</span> <span class="special">&amp;</span> str<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> re<span class="special">,</span> 
                <span class="keyword">typename</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> <span class="keyword">const</span> <span class="special">*</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> 
                <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Char<span class="special">&gt;</span> 
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">remove_const</span><span class="special">&lt;</span> <span class="identifier">Char</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">&gt;</span> 
  <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">Char</span> <span class="special">*</span> str<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">Char</span> <span class="special">*</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> re<span class="special">,</span> 
                <span class="keyword">typename</span> <span class="identifier">add_const</span><span class="special">&lt;</span> <span class="identifier">Char</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">*</span> format<span class="special">,</span> 
                <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> flags <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm45555018622080"></a><h2>Description</h2>
<p>Constructs a <code class="computeroutput"><code class="computeroutput"><a class="link" href="regex_iterator.html" title="Struct template regex_iterator">regex_iterator</a></code></code> object: <code class="computeroutput"><code class="computeroutput"><a class="link" href="regex_iterator.html" title="Struct template regex_iterator">regex_iterator</a></code>&lt; BidiIter &gt; i(begin, end, re, flags)</code>, and uses <code class="computeroutput">i</code> to enumerate through all of the matches m of type <code class="computeroutput"><code class="computeroutput"><a class="link" href="match_results.html" title="Struct template match_results">match_results</a></code>&lt; BidiIter &gt;</code> that occur within the sequence <code class="computeroutput">[begin, end)</code>. If no such matches are found and <code class="computeroutput">!(flags &amp; format_no_copy)</code> then calls <code class="computeroutput">std::copy(begin, end, out)</code>. Otherwise, for each match found, if <code class="computeroutput">!(flags &amp; format_no_copy)</code> calls <code class="computeroutput">std::copy(m.prefix().first, m.prefix().second, out)</code>, and then calls <code class="computeroutput">m.format(out, format, flags)</code>. Finally if <code class="computeroutput">!(flags &amp; format_no_copy)</code> calls <code class="computeroutput">std::copy(last_m.suffix().first, last_m.suffix().second, out)</code> where <code class="computeroutput">last_m</code> is a copy of the last match found.</p>
<p>If <code class="computeroutput">flags &amp; format_first_only</code> is non-zero then only the first match found is replaced.</p>
<p>






</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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</colgroup>
<tbody>
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<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 the input sequence. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the input sequence. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">flags</code></span></p></td>
<td><p>Optional match flags, used to control how the expression is matched against the sequence. (See <code class="computeroutput">match_flag_type</code>.) </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">format</code></span></p></td>
<td><p>The format string used to format the replacement sequence, or a formatter function, function object, or expression. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">out</code></span></p></td>
<td><p>An output iterator into which the output sequence is written. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">re</code></span></p></td>
<td><p>The regular expression object to use. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p>Type <code class="computeroutput">BidiIter</code> meets the requirements of a Bidirectional Iterator (24.1.4). </p></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p>Type <code class="computeroutput">OutIter</code> meets the requirements of an Output Iterator (24.1.2). </p></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p>Type <code class="computeroutput">Formatter</code> models <code class="computeroutput">ForwardRange</code>, <code class="computeroutput">Callable&lt;<a class="link" href="match_results.html" title="Struct template match_results">match_results</a>&lt;BidiIter&gt; &gt;</code>, <code class="computeroutput">Callable&lt;<a class="link" href="match_results.html" title="Struct template match_results">match_results</a>&lt;BidiIter&gt;, OutIter&gt;</code>, or <code class="computeroutput">Callable&lt;<a class="link" href="match_results.html" title="Struct template match_results">match_results</a>&lt;BidiIter&gt;, OutIter, regex_constants::match_flag_type&gt;</code>; or else it is a null-terminated format string, or an expression template representing a formatter lambda expression. </p></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p><code class="computeroutput">[begin,end)</code> denotes a valid iterator range. </p></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>The value of the output iterator after the output sequence has been written to it. </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> on stack exhaustion or invalid format string. </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<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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