| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Character Classification (alnum, digit, etc.)</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 2.4.1"> |
| <link rel="up" href="../char.html" title="Char"> |
| <link rel="prev" href="char_generator.html" title="Character Generators (char_, lit)"> |
| <link rel="next" href="../directive.html" title="Directive"> |
| </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="char_generator.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../char.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="../directive.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.karma.reference.char.char_class"></a><a class="link" href="char_class.html" title="Character Classification (alnum, digit, etc.)">Character |
| Classification (<code class="computeroutput"><span class="identifier">alnum</span></code>, |
| <code class="computeroutput"><span class="identifier">digit</span></code>, etc.)</a> |
| </h5></div></div></div> |
| <a name="spirit.karma.reference.char.char_class.description"></a><h6> |
| <a name="id1029584"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.description">Description</a> |
| </h6> |
| <p> |
| The library has the full repertoire of single character generators for |
| character classification. This includes the usual <code class="computeroutput"><span class="identifier">alnum</span></code>, |
| <code class="computeroutput"><span class="identifier">alpha</span></code>, <code class="computeroutput"><span class="identifier">digit</span></code>, <code class="computeroutput"><span class="identifier">xdigit</span></code>, |
| etc. generators. These generators have an associated <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. This is needed when doing basic operations |
| such as forcing lower or upper case. |
| </p> |
| <a name="spirit.karma.reference.char.char_class.header"></a><h6> |
| <a name="id1029634"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.header">Header</a> |
| </h6> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/char/char_class.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_char_class</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.char.char_class.namespace"></a><h6> |
| <a name="id1029709"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.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">alnum</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">alpha</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">blank</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">cntrl</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">digit</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">graph</span></code> |
| </p> |
| </td></tr> |
| <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">print</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">punct</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">space</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> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">xdigit</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> used by the corresponding character class generator. |
| All listed generators have a mandatory attribute <code class="computeroutput"><span class="identifier">Ch</span></code> |
| and will not compile if no attribute is associated. |
| </p> |
| <a name="spirit.karma.reference.char.char_class.model_of"></a><h6> |
| <a name="id1030075"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.model_of">Model |
| of</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| <a class="link" href="../generator_concepts/primitivegenerator.html" title="PrimitiveGenerator"><code class="computeroutput"><span class="identifier">PrimitiveGenerator</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">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.char.char_class.expression_semantics"></a><h6> |
| <a name="id1030141"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.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="../generator_concepts/primitivegenerator.html" title="PrimitiveGenerator"><code class="computeroutput"><span class="identifier">PrimitiveGenerator</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">ns</span><span class="special">::</span><span class="identifier">alnum</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isalnum</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">alpha</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isalpha</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">blank</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isblank</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">cntrl</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">iscntrl</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">digit</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isdigit</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">graph</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isgraph</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">print</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isprint</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">punct</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">ispunct</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">xdigit</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isxdigit</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">lower</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">islower</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </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> |
| <td> |
| <p> |
| If the mandatory attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isupper</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">ns</span><span class="special">::</span><span class="identifier">space</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| If the optional attribute satisfies the concept of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isspace</span></code> in the <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> the generator succeeds after emitting |
| its attribute (unless the underlying output stream reports |
| an error). This generator fails otherwise while not generating |
| anything.If no attribute is supplied this generator emits a |
| single space character in the character set defined by <code class="computeroutput"><span class="identifier">ns</span></code>. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p> |
| Possible values for <code class="computeroutput"><span class="identifier">ns</span></code> |
| are described in the section <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a>. |
| </p> |
| <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 generators <code class="computeroutput"><span class="identifier">alpha</span></code> |
| and <code class="computeroutput"><span class="identifier">alnum</span></code> might seem |
| to behave unexpected if used inside a <code class="computeroutput"><span class="identifier">lower</span><span class="special">[]</span></code> or <code class="computeroutput"><span class="identifier">upper</span><span class="special">[]</span></code> directive. Both directives additionally |
| apply the semantics of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">islower</span></code> |
| or <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">isupper</span></code> to the respective character |
| class. Some examples: |
| </p> |
| <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">s</span><span class="special">;</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_insert_iterator</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">out</span><span class="special">(</span><span class="identifier">s</span><span class="special">);</span> |
| <span class="identifier">generate</span><span class="special">(</span><span class="identifier">out</span><span class="special">,</span> <span class="identifier">lower</span><span class="special">[</span><span class="identifier">alpha</span><span class="special">],</span> <span class="char">'a'</span><span class="special">);</span> <span class="comment">// succeeds emitting 'a' |
| </span><span class="identifier">generate</span><span class="special">(</span><span class="identifier">out</span><span class="special">,</span> <span class="identifier">lower</span><span class="special">[</span><span class="identifier">alpha</span><span class="special">],</span> <span class="char">'A'</span><span class="special">);</span> <span class="comment">// fails |
| </span></pre> |
| <p> |
| The generator directive <code class="computeroutput"><span class="identifier">upper</span><span class="special">[]</span></code> behaves correspondingly. |
| </p> |
| </td></tr> |
| </table></div> |
| <a name="spirit.karma.reference.char.char_class.attributes"></a><h6> |
| <a name="id1032197"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.attributes">Attributes</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| All listed character class generators can take any attribute <code class="computeroutput"><span class="identifier">Ch</span></code>. All character class generators |
| (except <code class="computeroutput"><span class="identifier">space</span></code>) require |
| an attribute and will fail compiling otherwise. |
| </p></blockquote></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> |
| In addition to their usual attribute of type <code class="computeroutput"><span class="identifier">Ch</span></code> |
| all listed generators accept an instance of a <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><</span><span class="identifier">Ch</span><span class="special">></span></code> as well. If the <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><></span></code> is initialized (holds a value) |
| the generators behave as if their attribute was an instance of <code class="computeroutput"><span class="identifier">Ch</span></code> and emit the value stored in the |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><></span></code>. |
| Otherwise the generators will fail. |
| </p></td></tr> |
| </table></div> |
| <a name="spirit.karma.reference.char.char_class.complexity"></a><h6> |
| <a name="id1032317"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.complexity">Complexity</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| O(1) |
| </p></blockquote></div> |
| <p> |
| The complexity is constant as the generators emit not more than one character |
| per invocation. |
| </p> |
| <a name="spirit.karma.reference.char.char_class.example"></a><h6> |
| <a name="id1032341"></a> |
| <a class="link" href="char_class.html#spirit.karma.reference.char.char_class.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">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">phoenix_core</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">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">phoenix_operator</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">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">std_pair</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">alpha</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">karma</span><span class="special">::</span><span class="identifier">upper</span><span class="special">;</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Basic usage of an <code class="computeroutput"><span class="identifier">alpha</span></code> |
| generator: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"a"</span><span class="special">,</span> <span class="identifier">alpha</span><span class="special">,</span> <span class="char">'a'</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"A"</span><span class="special">,</span> <span class="identifier">alpha</span><span class="special">,</span> <span class="char">'A'</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">""</span><span class="special">,</span> <span class="identifier">alpha</span><span class="special">,</span> <span class="char">'1'</span><span class="special">);</span> <span class="comment">// fails (as isalpha('1') is false) |
| </span><span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"A"</span><span class="special">,</span> <span class="identifier">upper</span><span class="special">[</span><span class="identifier">alpha</span><span class="special">],</span> <span class="char">'A'</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">""</span><span class="special">,</span> <span class="identifier">upper</span><span class="special">[</span><span class="identifier">alpha</span><span class="special">],</span> <span class="char">'a'</span><span class="special">);</span> <span class="comment">// fails (as isupper('a') is false) |
| </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="char_generator.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../char.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="../directive.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |