<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>PrimitiveParser</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="../parser_concepts.html" title="Parser Concepts"> <link rel="prev" href="parser.html" title="Parser"> <link rel="next" href="unaryparser.html" title="UnaryParser"> </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="parser.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../parser_concepts.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="unaryparser.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h5 class="title"> <a name="spirit.qi.reference.parser_concepts.primitiveparser"></a><a class="link" href="primitiveparser.html" title="PrimitiveParser">PrimitiveParser</a> </h5></div></div></div> <a name="spirit.qi.reference.parser_concepts.primitiveparser.description"></a><h6> <a name="id883282"></a> <a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.description">Description</a> </h6> <p> <span class="emphasis"><em>PrimitiveParser</em></span> is the most basic building block that the client uses to build more complex parsers. </p> <a name="spirit.qi.reference.parser_concepts.primitiveparser.refinement_of"></a><h6> <a name="id883305"></a> <a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.refinement_of">Refinement of</a> </h6> <div class="blockquote"><blockquote class="blockquote"><p> <a class="link" href="parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a> </p></blockquote></div> <a name="spirit.qi.reference.parser_concepts.primitiveparser.pre_skip"></a><h6> <a name="id883337"></a> <a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.pre_skip">Pre-skip</a> </h6> <p> Upon entry to the <code class="computeroutput"><span class="identifier">parse</span></code> member function, a PrimitiveParser is required to do a pre-skip. Leading <code class="computeroutput"><span class="identifier">skip</span></code> characters/tokens will be skipped prior to parsing. Only PrimitiveParsers are required to perform this pre-skip. This is typically carried out through a call to <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip_over</span></code>: </p> <pre class="programlisting"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip_over</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span> <span class="identifier">l</span><span class="special">,</span> <span class="identifier">skip</span><span class="special">);</span> </pre> <a name="spirit.qi.reference.parser_concepts.primitiveparser.type_expressions"></a><h6> <a name="id883428"></a> <a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.type_expressions">Type Expressions</a> </h6> <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">traits</span><span class="special">::</span><span class="identifier">is_primitive_parser</span><span class="special"><</span><span class="identifier">P</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td> <td> <p> Metafunction that evaluates to <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code> if a certain type, <code class="computeroutput"><span class="identifier">P</span></code>, is a PrimitiveParser, <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">false_</span></code> otherwise (See <a href="../../../../../../../../libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL Boolean Constant</a>). </p> </td> </tr></tbody> </table></div> <a name="spirit.qi.reference.parser_concepts.primitiveparser.models"></a><h6> <a name="id883568"></a> <a class="link" href="primitiveparser.html#spirit.qi.reference.parser_concepts.primitiveparser.models">Models</a> </h6> <div class="itemizedlist"><ul class="itemizedlist" type="disc"> <li class="listitem"> <a class="link" href="../auxiliary/attr.html" title="Attribute (attr)"><code class="computeroutput"><span class="identifier">attr</span><span class="special">(</span><span class="identifier">attrib</span><span class="special">)</span></code></a> </li> <li class="listitem"> <a class="link" href="../auxiliary/eoi.html" title="End of Input (eoi)"><code class="computeroutput"><span class="identifier">eoi</span></code></a> </li> <li class="listitem"> <a class="link" href="../auxiliary/eol.html" title="End of Line (eol)"><code class="computeroutput"><span class="identifier">eol</span></code></a> </li> <li class="listitem"> <a class="link" href="../auxiliary/eps.html" title="Epsilon (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a> </li> <li class="listitem"> <a class="link" href="../string/symbols.html" title="Symbols (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special"><</span><span class="identifier">Ch</span><span class="special">,</span> <span class="identifier">T</span><span class="special">></span></code></a> </li> </ul></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="parser.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../parser_concepts.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="unaryparser.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>