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<div class="titlepage"><div><div><h5 class="title">
<a name="spirit.lex.reference.primitives.char_tokendef"></a><a class="link" href="char_tokendef.html" title="Tokens Matching Single Characters"> Tokens
Matching Single Characters</a>
</h5></div></div></div>
<a name="spirit.lex.reference.primitives.char_tokendef.description"></a><h6>
<a name="id1194351"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.description">Description</a>
</h6>
<p>
The character based token definitions described in this section are:
</p>
<p>
The <code class="computeroutput"><span class="identifier">char_</span></code> creates token
definitions matching single characters. The <code class="computeroutput"><span class="identifier">char_</span></code>
token definition is associated <code class="computeroutput"><span class="identifier">standard</span></code>
encoding namespace. This is needed when doing basic operations such as
forcing lower or upper case and dealing with character ranges.
</p>
<a name="spirit.lex.reference.primitives.char_tokendef.header"></a><h6>
<a name="id1194396"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.header">Header</a>
</h6>
<a name="spirit.lex.reference.primitives.char_tokendef.module_headers"></a><h6>
<a name="id1194411"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.module_headers">Module
Headers</a>
</h6>
<pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/lex/lexer/char_token_def.hpp>
</span><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">lex_char_token_def</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
</pre>
<p>
Also, see <a class="link" href="../../../structure/include.html" title="Include">Include Structure</a>.
</p>
<a name="spirit.lex.reference.primitives.char_tokendef.namespace"></a><h6>
<a name="id1194488"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.namespace">Namespace</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
<p>
Name
</p>
</th></tr></thead>
<tbody>
<tr><td>
<p>
<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">lit</span> <span class="comment">// alias:
boost::spirit::lex::lit</span></code>
</p>
</td></tr>
<tr><td>
<p>
<code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">char_</span></code>
</p>
</td></tr>
</tbody>
</table></div>
<a name="spirit.lex.reference.primitives.char_tokendef.model_of"></a><h6>
<a name="id1194591"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.model_of">Model
of</a>
</h6>
<div class="blockquote"><blockquote class="blockquote"><p>
<a class="link" href="../lexer_concepts/primitivelexer.html" title="PrimitiveLexer"><code class="computeroutput"><span class="identifier">PrimitiveLexer</span></code></a>
</p></blockquote></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><code class="computeroutput"><span class="identifier">ch</span></code></span></dt>
<dd><p>
Character-class specific character from <code class="computeroutput"><span class="identifier">standard</span></code>
character set.
</p></dd>
</dl>
</div>
<a name="spirit.lex.reference.primitives.char_tokendef.expression_semantics"></a><h6>
<a name="id1194656"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.expression_semantics">Expression
Semantics</a>
</h6>
<p>
Semantics of an expression is defined only where it differs from, or
is not defined in <a class="link" href="../lexer_concepts/primitivelexer.html" title="PrimitiveLexer"><code class="computeroutput"><span class="identifier">PrimitiveLexer</span></code></a>.
</p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Expression
</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>
Create a token definition matching the character literal <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>
Create a token definition matching the character literal <code class="computeroutput"><span class="identifier">ch</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">char_</span><span class="special">(</span><span class="identifier">ch</span><span class="special">)</span></code>
</p>
</td>
<td>
<p>
Create a token definition matching the character <code class="computeroutput"><span class="identifier">ch</span></code>.
</p>
</td>
</tr>
</tbody>
</table></div>
<a name="spirit.lex.reference.primitives.char_tokendef.example"></a><h6>
<a name="id1194843"></a>
<a class="link" href="char_tokendef.html#spirit.lex.reference.primitives.char_tokendef.example">Example</a>
</h6>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2010 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>)
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