<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Inhibiting Skipping Without Pre-skip (no_skip[])</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="../directive.html" title="Directive"> <link rel="prev" href="lexeme.html" title="Inhibiting Skipping (lexeme[])"> <link rel="next" href="no_case.html" title="Inhibiting Case Sensitivity (no_case[])"> </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="lexeme.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../directive.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="no_case.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.directive.no_skip"></a><a class="link" href="no_skip.html" title="Inhibiting Skipping Without Pre-skip (no_skip[])"> Inhibiting Skipping Without Pre-skip (<code class="computeroutput"><span class="identifier">no_skip</span><span class="special">[]</span></code>)</a> </h5></div></div></div> <a name="spirit.qi.reference.directive.no_skip.description"></a><h6> <a name="id929133"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.description">Description</a> </h6> <p> The <code class="computeroutput"><span class="identifier">no_skip</span><span class="special">[]</span></code> directive turns off white space skipping. The difference to <a class="link" href="lexeme.html" title="Inhibiting Skipping (lexeme[])"><code class="computeroutput"><span class="identifier">lexeme</span></code></a> is that it does not do pre-skipping in any case. Otherwise it is completely equivalent to the <a class="link" href="lexeme.html" title="Inhibiting Skipping (lexeme[])"><code class="computeroutput"><span class="identifier">lexeme</span></code></a> directive. </p> <a name="spirit.qi.reference.directive.no_skip.header"></a><h6> <a name="id929180"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.header">Header</a> </h6> <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/qi/directive/no_skip.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">qi_no_skip</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.qi.reference.directive.no_skip.namespace"></a><h6> <a name="id929254"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.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">no_skip</span> <span class="comment">// alias: boost::spirit::qi::no_skip</span></code> </p> </td></tr></tbody> </table></div> <a name="spirit.qi.reference.directive.no_skip.model_of"></a><h6> <a name="id929334"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.model_of">Model of</a> </h6> <div class="blockquote"><blockquote class="blockquote"><p> <a class="link" href="../parser_concepts/unaryparser.html" title="UnaryParser"><code class="computeroutput"><span class="identifier">UnaryParser</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">a</span></code></span></dt> <dd><p> A <a class="link" href="../parser_concepts/parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a>. </p></dd> </dl> </div> <a name="spirit.qi.reference.directive.no_skip.expression_semantics"></a><h6> <a name="id929402"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.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="../parser_concepts/unaryparser.html" title="UnaryParser"><code class="computeroutput"><span class="identifier">UnaryParser</span></code></a>. </p> <div class="informaltable"><table class="table"> <colgroup> <col> <col> </colgroup> <thead><tr> <th> <p> Expression </p> </th> <th> <p> Semantics </p> </th> </tr></thead> <tbody><tr> <td> <p> <code class="computeroutput"><span class="identifier">no_skip</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> </p> </td> <td> <p> Turns off white space skipping for the subject parser, <code class="computeroutput"><span class="identifier">a</span></code> (and all its children). This directive does not pre-skips. </p> </td> </tr></tbody> </table></div> <a name="spirit.qi.reference.directive.no_skip.attributes"></a><h6> <a name="id929509"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.attributes">Attributes</a> </h6> <p> See <a class="link" href="../../quick_reference/compound_attribute_rules.html#spirit.qi.quick_reference.compound_attribute_rules.notation">Compound Attribute Notation</a>. </p> <div class="informaltable"><table class="table"> <colgroup> <col> <col> </colgroup> <thead><tr> <th> <p> Expression </p> </th> <th> <p> Attribute </p> </th> </tr></thead> <tbody><tr> <td> <p> <code class="computeroutput"><span class="identifier">no_skip</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> </p> </td> <td> <p> </p> <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">a</span><span class="special">:</span> <span class="identifier">A</span> <span class="special">--></span> <span class="identifier">no_skip</span><span class="special">[</span><span class="identifier">a</span><span class="special">]:</span> <span class="identifier">A</span> <span class="identifier">a</span><span class="special">:</span> <span class="identifier">Unused</span> <span class="special">--></span> <span class="identifier">no_skip</span><span class="special">[</span><span class="identifier">a</span><span class="special">]:</span> <span class="identifier">Unused</span></pre> <p> </p> </td> </tr></tbody> </table></div> <a name="spirit.qi.reference.directive.no_skip.complexity"></a><h6> <a name="id929683"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.complexity">Complexity</a> </h6> <div class="blockquote"><blockquote class="blockquote"><p> The complexity is defined by the complexity of the subject parser, <code class="computeroutput"><span class="identifier">a</span></code> </p></blockquote></div> <a name="spirit.qi.reference.directive.no_skip.example"></a><h6> <a name="id929710"></a> <a class="link" href="no_skip.html#spirit.qi.reference.directive.no_skip.example">Example</a> </h6> <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 test harness for the example(s) below is presented in the <a class="link" href="../basics.html#spirit.qi.reference.basics.examples">Basics Examples</a> section. </p></td></tr> </table></div> <p> Some using declarations: </p> <p> </p> <pre class="programlisting"><span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">no_skip</span><span class="special">;</span> <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">char_</span><span class="special">;</span> </pre> <p> </p> <p> Simple usage of <code class="computeroutput"><span class="identifier">no_skip</span><span class="special">[]</span></code>: </p> <p> The use of no_skip here will prevent skipping of whitespace in front and in between the characters of the string <code class="computeroutput"><span class="char">' abc '</span></code>. </p> <p> </p> <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">str</span><span class="special">;</span> <span class="identifier">test_phrase_parser_attr</span><span class="special">(</span><span class="string">"' abc '"</span><span class="special">,</span> <span class="char">'\''</span> <span class="special">>></span> <span class="identifier">no_skip</span><span class="special">[+~</span><span class="identifier">char_</span><span class="special">(</span><span class="char">'\''</span><span class="special">)]</span> <span class="special">>></span> <span class="char">'\''</span><span class="special">,</span> <span class="identifier">str</span><span class="special">);</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">str</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// will output: > abc < </span></pre> <p> </p> </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="lexeme.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../directive.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="no_case.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>