| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Basics</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="../reference.html" title="Reference"> |
| <link rel="prev" href="generator_concepts/nonterminal.html" title="Nonterminal"> |
| <link rel="next" href="generate_api.html" title="Generator API"> |
| </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="generator_concepts/nonterminal.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="generate_api.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="spirit.karma.reference.karma_basics"></a><a class="link" href="karma_basics.html" title="Basics">Basics</a> |
| </h4></div></div></div> |
| <a name="spirit.karma.reference.karma_basics.lazy_argument"></a><h6> |
| <a name="id992212"></a> |
| <a class="link" href="karma_basics.html#spirit.karma.reference.karma_basics.lazy_argument">Lazy |
| Argument</a> |
| </h6> |
| <p> |
| Some generators (e.g. primitives and non-terminals) may take in additional |
| attributes. Such generators take the form: |
| </p> |
| <pre class="programlisting"><span class="identifier">g</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span> <span class="identifier">a2</span><span class="special">,...,</span> <span class="identifier">aN</span><span class="special">)</span> |
| </pre> |
| <p> |
| where <code class="computeroutput"><span class="identifier">g</span></code> is a generator. |
| Each of the arguments (a1 ... aN) can either be an immediate value, or |
| a function, <code class="computeroutput"><span class="identifier">f</span></code>, with signature: |
| </p> |
| <pre class="programlisting"><span class="identifier">T</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Unused</span><span class="special">,</span> <span class="identifier">Context</span><span class="special">)</span> |
| </pre> |
| <p> |
| where <code class="computeroutput"><span class="identifier">T</span></code>, the function's |
| return value, is compatible with the argument type expected and <code class="computeroutput"><span class="identifier">Context</span></code> is the generator's Context type |
| (The first argument is <code class="computeroutput"><span class="identifier">unused</span></code> |
| to make the <code class="computeroutput"><span class="identifier">Context</span></code> the |
| second argument. This is done for uniformity with <a class="link" href="../tutorials/semantic_actions.html" title="Semantic Actions">Semantic |
| Actions</a>). |
| </p> |
| <a name="spirit.karma.reference.karma_basics.character_encoding_namespace"></a><h6> |
| <a name="id992352"></a> |
| <a class="link" href="karma_basics.html#spirit.karma.reference.karma_basics.character_encoding_namespace">Character |
| Encoding Namespace</a> |
| </h6> |
| <p> |
| Some generators need to know which character set a <code class="computeroutput"><span class="keyword">char</span></code> |
| or <code class="computeroutput"><span class="keyword">wchar_t</span></code> is operating on. |
| For example, the <code class="computeroutput"><span class="identifier">alnum</span></code> |
| generator works differently with ISO8859.1 and ASCII encodings. Where necessary, |
| Spirit encodes (tags) the generator with the character set. |
| </p> |
| <p> |
| We have a namespace for each character set Spirit will be supporting. That |
| includes <code class="computeroutput"><span class="identifier">ascii</span></code>, <code class="computeroutput"><span class="identifier">iso8859_1</span></code>, <code class="computeroutput"><span class="identifier">standard</span></code> |
| and <code class="computeroutput"><span class="identifier">standard_wide</span></code> (and |
| in the future, <code class="computeroutput"><span class="identifier">unicode</span></code>). |
| In each of the character encoding namespaces, we place tagged versions |
| of generators such as <code class="computeroutput"><span class="identifier">alnum</span></code>, |
| <code class="computeroutput"><span class="identifier">space</span></code> etc. |
| </p> |
| <p> |
| Example: |
| </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">space</span><span class="special">;</span> <span class="comment">// use the ASCII space generator |
| </span></pre> |
| <p> |
| Namespaces: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| boost::spirit::ascii |
| </li> |
| <li class="listitem"> |
| boost::spirit::iso8859_1 |
| </li> |
| <li class="listitem"> |
| boost::spirit::standard |
| </li> |
| <li class="listitem"> |
| boost::spirit::standard_wide |
| </li> |
| </ul></div> |
| <p> |
| For ease of use, the components in this namespaces are also brought into |
| the karma sub-namespaces with the same names: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| boost::spirit::karma::ascii |
| </li> |
| <li class="listitem"> |
| boost::spirit::karma::iso8859_1 |
| </li> |
| <li class="listitem"> |
| boost::spirit::karma::standard |
| </li> |
| <li class="listitem"> |
| boost::spirit::karma::standard_wide |
| </li> |
| </ul></div> |
| <a name="spirit.karma.reference.karma_basics.examples"></a><h6> |
| <a name="id992568"></a> |
| <a class="link" href="karma_basics.html#spirit.karma.reference.karma_basics.examples">Examples</a> |
| </h6> |
| <p> |
| All sections in the reference present some real world examples. The examples |
| use a common test harness to keep the example code as minimal and direct |
| to the point as possible. The test harness is presented below. |
| </p> |
| <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> |
| The used output iterator: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">typedef</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">output_iterator_type</span><span class="special">;</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Our test functions: |
| </p> |
| <p> |
| This one tests the generators without attributes. |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_generator</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</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">g</span><span class="special">)</span> <span class="special">&&</span> <span class="identifier">s</span> <span class="special">==</span> <span class="identifier">expected</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| These test the generators with one or more user supplied attributes. |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">attr</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</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">g</span><span class="special">,</span> <span class="identifier">attr</span><span class="special">)</span> <span class="special">&&</span> <span class="identifier">s</span> <span class="special">==</span> <span class="identifier">expected</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">,</span> <span class="identifier">T1</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">attr1</span><span class="special">,</span> |
| <span class="identifier">T2</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">attr2</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</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">g</span><span class="special">,</span> <span class="identifier">attr1</span><span class="special">,</span> <span class="identifier">attr2</span><span class="special">)</span> <span class="special">&&</span> <span class="identifier">s</span> <span class="special">==</span> <span class="identifier">expected</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| This tests the generators with one attribute and while using delimited |
| output. |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Delimiter</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_generator_attr_delim</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">,</span> <span class="identifier">Delimiter</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">d</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">attr</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</span><span class="special">::</span><span class="identifier">generate_delimited</span><span class="special">(</span><span class="identifier">out</span><span class="special">,</span> <span class="identifier">g</span><span class="special">,</span> <span class="identifier">d</span><span class="special">,</span> <span class="identifier">attr</span><span class="special">)</span> <span class="special">&&</span> <span class="identifier">s</span> <span class="special">==</span> <span class="identifier">expected</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| The examples of the binary generators use one or more of the following |
| tests. |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_binary_generator</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</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">g</span><span class="special">)</span> <span class="special">&&</span> <span class="special">!</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">memcmp</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">c_str</span><span class="special">(),</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">size</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">G</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">test_binary_generator_attr</span><span class="special">(</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">,</span> <span class="identifier">G</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">g</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">attr</span><span class="special">)</span> |
| <span class="special">{</span> |
| <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="keyword">if</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">karma</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">g</span><span class="special">,</span> <span class="identifier">attr</span><span class="special">)</span> <span class="special">&&</span> <span class="special">!</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">memcmp</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">c_str</span><span class="special">(),</span> <span class="identifier">expected</span><span class="special">,</span> <span class="identifier">size</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="string">"ok"</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="keyword">else</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"fail"</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="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <a name="spirit.karma.reference.karma_basics.models"></a><h6> |
| <a name="id996310"></a> |
| <a class="link" href="karma_basics.html#spirit.karma.reference.karma_basics.models">Models</a> |
| </h6> |
| <p> |
| Predefined models include: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| any literal string, e.g. "Hello, World", |
| </li> |
| <li class="listitem"> |
| a pointer/reference to a null-terminated array of characters |
| </li> |
| <li class="listitem"> |
| a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">Char</span><span class="special">></span></code> |
| </li> |
| </ul></div> |
| <p> |
| The namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">traits</span></code> is open for users to provide their |
| own specializations. The customization points implemented by <span class="emphasis"><em>Spirit.Karma</em></span> |
| usable to customize the behavior of generators are described in the section |
| <a class="link" href="../../advanced/customize.html" title="Customization of Spirit's Attribute Handling">Customization of Attribute Handling</a>. |
| </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="generator_concepts/nonterminal.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="generate_api.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |