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| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="spirit.karma.reference.directive.upperlower"></a><a class="link" href="upperlower.html" title="Directives Controlling Case Sensitivity (upper[], lower[])">Directives |
| Controlling Case Sensitivity (<code class="computeroutput"><span class="identifier">upper</span><span class="special">[]</span></code>, <code class="computeroutput"><span class="identifier">lower</span><span class="special">[]</span></code>)</a> |
| </h5></div></div></div> |
| <a name="spirit.karma.reference.directive.upperlower.description"></a><h6> |
| <a name="id1044752"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.description">Description</a> |
| </h6> |
| <p> |
| The generator directives <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">lower</span><span class="special">[]</span></code> and <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">upper</span><span class="special">[]</span></code> force their embedded generators to |
| emit lower case or upper case only characters based on the interpretation |
| of the generated characters in the character set defined by <code class="computeroutput"><span class="identifier">ns</span></code> (see <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a>). |
| </p> |
| <a name="spirit.karma.reference.directive.upperlower.header"></a><h6> |
| <a name="id1044817"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.header">Header</a> |
| </h6> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/directive/upper_lower_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">karma_upper_lower_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> |
| <a name="spirit.karma.reference.directive.upperlower.namespace"></a><h6> |
| <a name="id1044892"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.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">lower</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">upper</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="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. |
| </p> |
| <a name="spirit.karma.reference.directive.upperlower.model_of"></a><h6> |
| <a name="id1044998"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.model_of">Model |
| of</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| The model of <code class="computeroutput"><span class="identifier">lower</span><span class="special">[]</span></code> and <code class="computeroutput"><span class="identifier">upper</span><span class="special">[]</span></code> is the model of its subject generator. |
| </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 generator object |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">A</span></code></span></dt> |
| <dd><p> |
| Attribute type of the generator <code class="computeroutput"><span class="identifier">a</span></code> |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">ns</span></code></span></dt> |
| <dd><p> |
| A <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. |
| </p></dd> |
| </dl> |
| </div> |
| <a name="spirit.karma.reference.directive.upperlower.expression_semantics"></a><h6> |
| <a name="id1045117"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.expression_semantics">Expression |
| Semantics</a> |
| </h6> |
| <p> |
| The <code class="computeroutput"><span class="identifier">lower</span><span class="special">[]</span></code> |
| and <code class="computeroutput"><span class="identifier">upper</span><span class="special">[]</span></code> |
| directives have no special generator semantics. They are pure modifier |
| directives. They indirectly influence the way all subject generators |
| work. They add information (the <code class="computeroutput"><span class="identifier">tag</span><span class="special">::</span><span class="identifier">upper</span></code> |
| or <code class="computeroutput"><span class="identifier">tag</span><span class="special">::</span><span class="identifier">lower</span></code>) to the <code class="computeroutput"><span class="identifier">Modifier</span></code> |
| template parameter used while transforming the <code class="computeroutput"><span class="identifier">proto</span><span class="special">::</span><span class="identifier">expr</span></code> |
| into the corresponding generator expression. This is achieved by the |
| following specializations: |
| </p> |
| <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">spirit</span> |
| <span class="special">{</span> |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">CharEncoding</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">is_modifier_directive</span><span class="special"><</span> |
| <span class="identifier">karma</span><span class="special">::</span><span class="identifier">domain</span> |
| <span class="special">,</span> <span class="identifier">tag</span><span class="special">::</span><span class="identifier">char_code</span><span class="special"><</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">lower</span><span class="special">,</span> <span class="identifier">CharEncoding</span><span class="special">></span> <span class="special">></span> |
| <span class="special">:</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span> |
| <span class="special">{};</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">CharEncoding</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">is_modifier_directive</span><span class="special"><</span> |
| <span class="identifier">karma</span><span class="special">::</span><span class="identifier">domain</span> |
| <span class="special">,</span> <span class="identifier">tag</span><span class="special">::</span><span class="identifier">char_code</span><span class="special"><</span><span class="identifier">tag</span><span class="special">::</span><span class="identifier">upper</span><span class="special">,</span> <span class="identifier">CharEncoding</span><span class="special">></span> <span class="special">></span> |
| <span class="special">:</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span> |
| <span class="special">}}</span> |
| </pre> |
| <p> |
| (for more details see the section describing the compilation process |
| of the <a href="../../../../../../../../doc/html/proto.html" target="_top">Boost.Proto</a> expression |
| into the corresponding generator expressions). |
| </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">lower</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Generate <code class="computeroutput"><span class="identifier">a</span></code> |
| as lower case, interpreted in the character set defined by |
| <code class="computeroutput"><span class="identifier">ns</span></code>. The directive |
| succeeds as long as the embedded generator succeeded (unless |
| the underlying output stream reports an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">upper</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Generate <code class="computeroutput"><span class="identifier">a</span></code> |
| as upper case, interpreted in the character set defined by |
| <code class="computeroutput"><span class="identifier">ns</span></code>. The directive |
| succeeds as long as the embedded generator succeeded (unless |
| the underlying output stream reports an error). |
| </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> |
| If both directives are 'active' with regard to a generator, the innermost |
| of those directives takes precedence. For instance: |
| </p> |
| <pre class="programlisting"><span class="identifier">generate</span><span class="special">(</span><span class="identifier">sink</span><span class="special">,</span> <span class="identifier">ascii</span><span class="special">::</span><span class="identifier">lower</span><span class="special">[</span><span class="char">'A'</span> <span class="special"><<</span> <span class="identifier">ascii</span><span class="special">::</span><span class="identifier">upper</span><span class="special">[</span><span class="char">'b'</span><span class="special">]])</span> |
| </pre> |
| <p> |
| will generate <code class="computeroutput"><span class="string">"aB"</span></code> |
| (without the quotes). |
| </p> |
| <p> |
| Further, the directives will have no effect on generators emitting |
| characters not having an upper case or lower case equivalent in the |
| character set defined by <code class="computeroutput"><span class="identifier">ns</span></code>. |
| </p> |
| </td></tr> |
| </table></div> |
| <a name="spirit.karma.reference.directive.upperlower.attributes"></a><h6> |
| <a name="id1046290"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.attributes">Attributes</a> |
| </h6> |
| <p> |
| See <a class="link" href="../../quick_reference/compound_attribute_rules.html#spirit.karma.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">lower</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">lower</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">lower</span><span class="special">[</span><span class="identifier">a</span><span class="special">]:</span> <span class="identifier">Unused</span></pre> |
| <p> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">:</span><span class="identifier">upper</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">upper</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">upper</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.karma.reference.directive.upperlower.complexity"></a><h6> |
| <a name="id1046623"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.complexity">Complexity</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| The overall complexity of the generator directives <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">lower</span><span class="special">[]</span></code> and <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">upper</span><span class="special">[]</span></code> is defined by the complexity of its |
| embedded generators. The directives themselves are compile time only |
| directives, having no impact on runtime performance. |
| </p></blockquote></div> |
| <a name="spirit.karma.reference.directive.upperlower.example"></a><h6> |
| <a name="id1046679"></a> |
| <a class="link" href="upperlower.html#spirit.karma.reference.directive.upperlower.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="../karma_basics.html#spirit.karma.reference.karma_basics.examples">Basics Examples</a> |
| section. |
| </p></td></tr> |
| </table></div> |
| <p> |
| Some includes: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><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">karma</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">string</span><span class="special">></span> |
| </pre> |
| <p> |
| </p> |
| <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">karma</span><span class="special">::</span><span class="identifier">double_</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">upper</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">lower</span><span class="special">;</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Basic usage of the <code class="computeroutput"><span class="identifier">upper</span></code> |
| and <code class="computeroutput"><span class="identifier">lower</span></code> generator directives: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"abc:2.0e-06"</span><span class="special">,</span> <span class="identifier">lower</span><span class="special">[</span><span class="string">"ABC:"</span> <span class="special"><<</span> <span class="identifier">double_</span><span class="special">],</span> <span class="number">2e-6</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"ABC:2.0E-06"</span><span class="special">,</span> <span class="identifier">upper</span><span class="special">[</span><span class="string">"abc:"</span> <span class="special"><<</span> <span class="identifier">double_</span><span class="special">],</span> <span class="number">2e-6</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 © 2001-2010 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"> |
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