<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Primitive Lexer Components</title> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.0"> <link rel="home" href="../../../index.html" title="Spirit 2.4"> <link rel="up" href="../quick_reference.html" title="Quick Reference"> <link rel="prev" href="common_notation.html" title="Common Notation"> <link rel="next" href="semantic_actions.html" title="Semantic Actions"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> <td align="center"><a href="../../../../../../../index.html">Home</a></td> <td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="common_notation.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../quick_reference.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="semantic_actions.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h4 class="title"> <a name="spirit.lex.quick_reference.lexers"></a><a class="link" href="lexers.html" title="Primitive Lexer Components"> Primitive Lexer Components</a> </h4></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> n/a </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="identifier">ch</span><span class="special">)</span></code> </p> </td> <td> <p> n/a </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">str</span></code> </p> </td> <td> <p> n/a </p> </td> <td> <p> Matches regular expression <code class="computeroutput"><span class="identifier">str</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">string</span><span class="special">(</span><span class="identifier">str</span><span class="special">)</span></code> </p> </td> <td> <p> n/a </p> </td> <td> <p> Matches regular expression <code class="computeroutput"><span class="identifier">str</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">token_def</span><span class="special"><</span><span class="identifier">Attrib</span><span class="special">></span></code> </p> </td> <td> <p> <code class="computeroutput"><span class="identifier">Attrib</span></code> </p> </td> <td> <p> Matches the immediate argument </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">a</span> <span class="special">|</span> <span class="identifier">b</span></code> </p> </td> <td> <p> n/a </p> </td> <td> <p> Matches any of the expressions <code class="computeroutput"><span class="identifier">a</span></code> or <code class="computeroutput"><span class="identifier">b</span></code> </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">l</span><span class="special">[</span><span class="identifier">fa</span><span class="special">]</span></code> </p> </td> <td> <p> Attribute of <code class="computeroutput"><span class="identifier">l</span></code> </p> </td> <td> <p> Call semantic action <code class="computeroutput"><span class="identifier">fa</span></code> (after matching <code class="computeroutput"><span class="identifier">l</span></code>). </p> </td> </tr> </tbody> </table></div> <div class="note"><table border="0" summary="Note"> <tr> <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../images/note.png"></td> <th align="left">Note</th> </tr> <tr><td align="left" valign="top"><p> The column <span class="emphasis"><em>Attribute</em></span> in the table above lists the parser attribute exposed by the lexer component if it is used as a parser (see Attribute). A 'n/a' in this columns means the lexer component is not usable as a parser. </p></td></tr> </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 © 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="common_notation.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../quick_reference.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="semantic_actions.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>