| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Parser Directive Inhibiting Case Sensitivity (no_case[])</title> |
| <link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> |
| <link rel="home" href="../../../../index.html" title="Spirit 2.5.2"> |
| <link rel="up" href="../directive.html" title="Parser Directives"> |
| <link rel="prev" href="no_skip.html" title="Parser Directive Inhibiting Skipping Without Pre-skip (no_skip[])"> |
| <link rel="next" href="omit.html" title="Parser Directive Ignoring Attribute (omit[])"> |
| </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="no_skip.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="omit.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_case"></a><a class="link" href="no_case.html" title="Parser Directive Inhibiting Case Sensitivity (no_case[])">Parser Directive |
| Inhibiting Case Sensitivity (<code class="computeroutput"><span class="identifier">no_case</span><span class="special">[]</span></code>)</a> |
| </h5></div></div></div> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h0"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.description"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.description">Description</a> |
| </h6> |
| <p> |
| The <code class="computeroutput"><span class="identifier">no_case</span><span class="special">[]</span></code> |
| directive does not consume any input. The actual matching is done by |
| its subject parser. It's purpose is to force matching of the subject |
| parser (and all its children) to be case insensitive. |
| </p> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h1"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.header"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.header">Header</a> |
| </h6> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/qi/directive/no_case.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_case</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> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h2"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.namespace"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.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">ns</span><span class="special">::</span><span class="identifier">no_case</span></code> |
| </p> |
| </td></tr></tbody> |
| </table></div> |
| <p> |
| In the table above, <code class="computeroutput"><span class="identifier">ns</span></code> |
| represents a <a class="link" href="../basics.html#spirit.qi.reference.basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. |
| </p> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h3"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.model_of"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.model_of">Model |
| of</a> |
| </h6> |
| <p> |
| The model of <code class="computeroutput"><span class="identifier">no_case</span></code> |
| is the model of its subject parser. |
| </p> |
| <div class="variablelist"> |
| <p class="title"><b>Notation</b></p> |
| <dl class="variablelist"> |
| <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> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">ns</span></code></span></dt> |
| <dd><p> |
| A <a class="link" href="../basics.html#spirit.qi.reference.basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. |
| </p></dd> |
| </dl> |
| </div> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h4"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.expression_semantics"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.expression_semantics">Expression |
| Semantics</a> |
| </h6> |
| <p> |
| Semantics of an expression is defined only where it differs from, or |
| is not defined in the subject's concept. |
| </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">ns</span><span class="special">::</span><span class="identifier">no_case</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Force matching of the subject parser, <code class="computeroutput"><span class="identifier">a</span></code> |
| (and all its children) to be case insensitive |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h5"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.attributes"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.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">ns</span><span class="special">::</span><span class="identifier">no_case</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">ns</span><span class="special">::</span><span class="identifier">no_case</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">ns</span><span class="special">::</span><span class="identifier">no_case</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> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h6"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.complexity"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.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> |
| <h6> |
| <a name="spirit.qi.reference.directive.no_case.h7"></a> |
| <span class="phrase"><a name="spirit.qi.reference.directive.no_case.example"></a></span><a class="link" href="no_case.html#spirit.qi.reference.directive.no_case.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">ascii</span><span class="special">::</span><span class="identifier">no_case</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">ascii</span><span class="special">::</span><span class="identifier">char_</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">ascii</span><span class="special">::</span><span class="identifier">alnum</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">symbols</span><span class="special">;</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Simple usage of <code class="computeroutput"><span class="identifier">no_case</span><span class="special">[]</span></code>: |
| </p> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="identifier">test_parser</span><span class="special">(</span><span class="string">"X"</span><span class="special">,</span> <span class="identifier">no_case</span><span class="special">[</span><span class="identifier">char_</span><span class="special">(</span><span class="char">'x'</span><span class="special">)]);</span> |
| <span class="identifier">test_parser</span><span class="special">(</span><span class="string">"6"</span><span class="special">,</span> <span class="identifier">no_case</span><span class="special">[</span><span class="identifier">alnum</span><span class="special">]);</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| A more sophisticated use case of <code class="computeroutput"><span class="identifier">no_case</span><span class="special">[]</span></code> in conjunction with a symbol table |
| (see <a class="link" href="../string/symbols.html" title="Symbols Parser (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special"><></span></code></a> |
| for more details): |
| </p> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="identifier">symbols</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">sym</span><span class="special">;</span> |
| |
| <span class="identifier">sym</span><span class="special">.</span><span class="identifier">add</span> |
| <span class="special">(</span><span class="string">"apple"</span><span class="special">,</span> <span class="number">1</span><span class="special">)</span> <span class="comment">// symbol strings are added in lowercase...</span> |
| <span class="special">(</span><span class="string">"banana"</span><span class="special">,</span> <span class="number">2</span><span class="special">)</span> |
| <span class="special">(</span><span class="string">"orange"</span><span class="special">,</span> <span class="number">3</span><span class="special">)</span> |
| <span class="special">;</span> |
| |
| <span class="keyword">int</span> <span class="identifier">i</span><span class="special">;</span> |
| <span class="comment">// ...because sym is used for case-insensitive parsing</span> |
| <span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"Apple"</span><span class="special">,</span> <span class="identifier">no_case</span><span class="special">[</span> <span class="identifier">sym</span> <span class="special">],</span> <span class="identifier">i</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">i</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="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"ORANGE"</span><span class="special">,</span> <span class="identifier">no_case</span><span class="special">[</span> <span class="identifier">sym</span> <span class="special">],</span> <span class="identifier">i</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">i</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</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 © 2001-2011 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="no_skip.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="omit.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
