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<title>Character Parsers</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="spirit_x3.quick_reference.char"></a><a class="link" href="char.html" title="Character Parsers">Character Parsers</a>
</h3></div></div></div>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Expression
                </p>
              </th>
<th>
                <p>
                  Attribute
                </p>
              </th>
<th>
                <p>
                  Description
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">ch</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Unused</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches <code class="computeroutput"><span class="identifier">ch</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">lit</span><span class="special">(</span><span class="identifier">ch</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Unused</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches <code class="computeroutput"><span class="identifier">ch</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">char_</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches any character
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">char_</span><span class="special">(</span><span class="identifier">ch</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches <code class="computeroutput"><span class="identifier">ch</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">char_</span><span class="special">(</span><span class="string">"c"</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a single char string literal, <code class="computeroutput"><span class="identifier">c</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">char_</span><span class="special">(</span><span class="identifier">ch</span><span class="special">,</span>
                  <span class="identifier">ch2</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a range of chars from <code class="computeroutput"><span class="identifier">ch</span></code>
                  to <code class="computeroutput"><span class="identifier">ch2</span></code> (inclusive)
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">char_</span><span class="special">(</span><span class="identifier">charset</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character set <code class="computeroutput"><span class="identifier">charset</span></code>
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">alnum</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isalnum</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">alpha</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isalpha</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">blank</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isblank</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">cntrl</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">iscntrl</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">digit</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isdigit</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">graph</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isgraph</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">print</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isprint</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">punct</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ispunct</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">space</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isspace</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">xdigit</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isxdigit</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">lower</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">islower</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">upper</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based on the equivalent of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isupper</span></code>
                  in the current character set
                </p>
              </td>
</tr>
</tbody>
</table></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; 2001-2018 Joel de Guzman,
      Hartmut Kaiser<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>)
      </p>
</div></td>
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