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<title>Struct template regex_token_iterator</title>
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<div class="refentry">
<a name="boost.xpressive.regex_token_iterator"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template regex_token_iterator</span></h2>
<p>boost::xpressive::regex_token_iterator</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: <<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.regex_token_iterator_hpp" title="Header <boost/xpressive/regex_token_iterator.hpp>">boost/xpressive/regex_token_iterator.hpp</a>>
</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> BidiIter<span class="special">></span>
<span class="keyword">struct</span> <a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a> <span class="special">{</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <a name="boost.xpressive.regex_token_iterator.regex_type"></a><span class="identifier">regex_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">iterator_value</span><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <a name="boost.xpressive.regex_token_iterator.char_type"></a><span class="identifier">char_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <a name="boost.xpressive.regex_token_iterator.value_type"></a><span class="identifier">value_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ptrdiff_t</span> <a name="boost.xpressive.regex_token_iterator.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">*</span> <a name="boost.xpressive.regex_token_iterator.pointer"></a><span class="identifier">pointer</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a name="boost.xpressive.regex_token_iterator.reference"></a><span class="identifier">reference</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">forward_iterator_tag</span> <a name="boost.xpressive.regex_token_iterator.iterator_category"></a><span class="identifier">iterator_category</span><span class="special">;</span>
<span class="comment">// <a class="link" href="regex_token_iterator.html#boost.xpressive.regex_token_iteratorconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="regex_token_iterator.html#idp163905864-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="regex_token_iterator.html#idp163906520-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> LetExpr<span class="special">></span>
<a class="link" href="regex_token_iterator.html#idp163908984-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Subs<span class="special">></span>
<a class="link" href="regex_token_iterator.html#idp163912536-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">Subs</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <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"><</span><span class="keyword">typename</span> Subs<span class="special">,</span> <span class="keyword">typename</span> LetExpr<span class="special">></span>
<a class="link" href="regex_token_iterator.html#idp163917464-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span><span class="special">,</span> <a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">Subs</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span><span class="special">,</span>
<span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <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>
<a class="link" href="regex_token_iterator.html#idp163923336-bb"><span class="identifier">regex_token_iterator</span></a><span class="special">(</span><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
regex_token_iterator& <a class="link" href="regex_token_iterator.html#idp163924472-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="regex_token_iterator.html#idp163902920-bb">public member functions</a></span>
<span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a class="link" href="regex_token_iterator.html#idp163903128-bb"><span class="keyword">operator</span><span class="special">*</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">*</span> <a class="link" href="regex_token_iterator.html#idp163903608-bb"><span class="keyword">operator</span><span class="special">-></span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="special">&</span> <a class="link" href="regex_token_iterator.html#idp163904088-bb"><span class="keyword">operator</span><span class="special">++</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <a class="link" href="regex_token_iterator.html#idp163904904-bb"><span class="keyword">operator</span><span class="special">++</span></a><span class="special">(</span><span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp257496408"></a><h2>Description</h2>
<div class="refsect2">
<a name="idp257496616"></a><h3>
<a name="boost.xpressive.regex_token_iteratorconstruct-copy-destruct"></a><code class="computeroutput">regex_token_iterator</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a name="idp163905864-bb"></a><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<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">Postconditions:</span></p></td>
<td><p><code class="computeroutput">*this</code> is the end of sequence iterator. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idp163906520-bb"></a><span class="identifier">regex_token_iterator</span><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"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rex<span class="special">)</span><span class="special">;</span></pre>
<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 the character range to search. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the character range to search. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
<td><p>The regex pattern to search for. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p><code class="computeroutput"></code>[begin,end) is a valid range. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> LetExpr<span class="special">></span>
<a name="idp163908984-bb"></a><span class="identifier">regex_token_iterator</span><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"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rex<span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> args<span class="special">)</span><span class="special">;</span></pre>
<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">args</code></span></p></td>
<td><p>A let() expression with argument bindings for semantic actions. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">begin</code></span></p></td>
<td><p>The beginning of the character range to search. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the character range to search. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
<td><p>The regex pattern to search for. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p><code class="computeroutput"></code>[begin,end) is a valid range. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Subs<span class="special">></span>
<a name="idp163912536-bb"></a><span class="identifier">regex_token_iterator</span><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"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rex<span class="special">,</span>
<span class="identifier">Subs</span> <span class="keyword">const</span> <span class="special">&</span> subs<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>
<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 the character range to search. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the character range to search. </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 match_flag_type.) </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
<td><p>The regex pattern to search for. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">subs</code></span></p></td>
<td><p>A range of integers designating sub-matches to be treated as tokens. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td>
<p><code class="computeroutput"></code>[begin,end) is a valid range. </p>
<p><code class="computeroutput">subs</code> is either an integer greater or equal to -1, or else an array or non-empty <code class="computeroutput">std::vector<></code> of such integers. </p>
</td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Subs<span class="special">,</span> <span class="keyword">typename</span> LetExpr<span class="special">></span>
<a name="idp163917464-bb"></a><span class="identifier">regex_token_iterator</span><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"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> rex<span class="special">,</span>
<span class="identifier">Subs</span> <span class="keyword">const</span> <span class="special">&</span> subs<span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> args<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>
<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">
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<td><p><span class="term"><code class="computeroutput">args</code></span></p></td>
<td><p>A let() expression with argument bindings for semantic actions. </p></td>
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<td><p><span class="term"><code class="computeroutput">begin</code></span></p></td>
<td><p>The beginning of the character range to search. </p></td>
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<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the character range to search. </p></td>
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<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 match_flag_type.) </p></td>
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<td><p><span class="term"><code class="computeroutput">rex</code></span></p></td>
<td><p>The regex pattern to search for. </p></td>
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<td><p><span class="term"><code class="computeroutput">subs</code></span></p></td>
<td><p>A range of integers designating sub-matches to be treated as tokens. </p></td>
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<td><p><span class="term">Requires:</span></p></td>
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<p><code class="computeroutput"></code>[begin,end) is a valid range. </p>
<p><code class="computeroutput">subs</code> is either an integer greater or equal to -1, or else an array or non-empty <code class="computeroutput">std::vector<></code> of such integers. </p>
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<pre class="literallayout"><a name="idp163923336-bb"></a><span class="identifier">regex_token_iterator</span><span class="special">(</span><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> that<span class="special">)</span><span class="special">;</span></pre>
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<td><p><span class="term">Postconditions:</span></p></td>
<td><p><code class="computeroutput">*this == that</code> </p></td>
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<pre class="literallayout">regex_token_iterator& <a name="idp163924472-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> that<span class="special">)</span><span class="special">;</span></pre>
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<td><p><span class="term">Postconditions:</span></p></td>
<td><p><code class="computeroutput">*this == that</code> </p></td>
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<div class="refsect2">
<a name="idp257581272"></a><h3>
<a name="idp163902920-bb"></a><code class="computeroutput">regex_token_iterator</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">&</span> <a name="idp163903128-bb"></a><span class="keyword">operator</span><span class="special">*</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">*</span> <a name="idp163903608-bb"></a><span class="keyword">operator</span><span class="special">-></span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="special">&</span> <a name="idp163904088-bb"></a><span class="keyword">operator</span><span class="special">++</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>If N == -1 then sets *this equal to the end of sequence iterator. Otherwise if N+1 < subs.size(), then increments N and sets result equal to ((subs[N] == -1) ? value_type(what.prefix().str()) : value_type(what[subs[N]].str())). Otherwise if what.prefix().first != what[0].second and if the element match_prev_avail is not set in flags then sets it. Then locates the next match as if by calling regex_search(what[0].second, end, what, *pre, flags), with the following variation: in the event that the previous match found was of zero length (what[0].length() == 0) then attempts to find a non-zero length match starting at what[0].second, only if that fails and provided what[0].second != suffix().second does it look for a (possibly zero length) match starting from what[0].second + 1. If such a match is found then sets N equal to zero, and sets result equal to ((subs[N] == -1) ? value_type(what.prefix().str()) : value_type(what[subs[N]].str())). Otherwise if no further matches were found, then let last_end be the endpoint of the last match that was found. Then if last_end != end and subs[0] == -1 sets N equal to -1 and sets result equal to value_type(last_end, end). Otherwise sets *this equal to the end of sequence iterator. </p>
</li>
<li class="listitem"><pre class="literallayout"><a class="link" href="regex_token_iterator.html" title="Struct template regex_token_iterator">regex_token_iterator</a><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span> <a name="idp163904904-bb"></a><span class="keyword">operator</span><span class="special">++</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span><span class="special">;</span></pre></li>
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<td align="right"><div class="copyright-footer">Copyright © 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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