| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Alignment Directives (left_align[], center[], right_align[])</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="../directive.html" title="Directive"> |
| <link rel="prev" href="../directive.html" title="Directive"> |
| <link rel="next" href="repeat.html" title="Repetition Directive (repeat[])"> |
| </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="../directive.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="repeat.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.directive.alignment"></a><a class="link" href="alignment.html" title="Alignment Directives (left_align[], center[], right_align[])">Alignment |
| Directives (<code class="computeroutput"><span class="identifier">left_align</span><span class="special">[]</span></code>, <code class="computeroutput"><span class="identifier">center</span><span class="special">[]</span></code>, <code class="computeroutput"><span class="identifier">right_align</span><span class="special">[]</span></code>)</a> |
| </h5></div></div></div> |
| <a name="spirit.karma.reference.directive.alignment.description"></a><h6> |
| <a name="id1033171"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.description">Description</a> |
| </h6> |
| <p> |
| The alignment directives allow to left align, right align or center output |
| emitted by other generators into columns of a specified width while using |
| an arbitrary generator to create the padding. |
| </p> |
| <a name="spirit.karma.reference.directive.alignment.header"></a><h6> |
| <a name="id1033187"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.header">Header</a> |
| </h6> |
| <p> |
| For the <code class="computeroutput"><span class="identifier">left_align</span><span class="special">[]</span></code> |
| directive: |
| </p> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/directive/left_alignment.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_left_alignment</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <p> |
| For the <code class="computeroutput"><span class="identifier">center</span><span class="special">[]</span></code> |
| directive: |
| </p> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/directive/center_alignment.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_center_alignment</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <p> |
| For the <code class="computeroutput"><span class="identifier">right_align</span><span class="special">[]</span></code> |
| directive: |
| </p> |
| <pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/directive/right_alignment.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_right_alignment</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.alignment.namespace"></a><h6> |
| <a name="id1033411"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.namespace">Namespace</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
| <colgroup><col></colgroup> |
| <thead><tr><th> |
| <p> |
| Name |
| </p> |
| </th></tr></thead> |
| <tbody> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">left_align</span> <span class="comment">// |
| alias: boost::spirit::karma::left_align</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">center</span> <span class="comment">// |
| alias: boost::spirit::karma::center</span></code> |
| </p> |
| </td></tr> |
| <tr><td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">right_align</span> <span class="comment">// |
| alias: boost::spirit::karma::right_align</span></code> |
| </p> |
| </td></tr> |
| </tbody> |
| </table></div> |
| <a name="spirit.karma.reference.directive.alignment.model_of"></a><h6> |
| <a name="id1035209"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.model_of">Model |
| of</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| <a class="link" href="../generator_concepts/unarygenerator.html" title="UnaryGenerator"><code class="computeroutput"><span class="identifier">UnaryGenerator</span></code></a> |
| </p></blockquote></div> |
| <div class="variablelist"> |
| <p class="title"><b>Notation</b></p> |
| <dl> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">a</span></code></span></dt> |
| <dd><p> |
| A generator object |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">pad</span></code></span></dt> |
| <dd><p> |
| A generator object, or a <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.lazy_argument">Lazy |
| Argument</a> that evaluates to a generator object |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">A</span></code>, <code class="computeroutput"><span class="identifier">Pad</span></code></span></dt> |
| <dd><p> |
| Attribute types of the generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">width</span></code></span></dt> |
| <dd><p> |
| Numeric literal, any unsigned integer value, or a <a class="link" href="../karma_basics.html#spirit.karma.reference.karma_basics.lazy_argument">Lazy |
| Argument</a> that evaluates to an unsigned integer value |
| </p></dd> |
| </dl> |
| </div> |
| <a name="spirit.karma.reference.directive.alignment.expression_semantics"></a><h6> |
| <a name="id1035361"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.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/unarygenerator.html" title="UnaryGenerator"><code class="computeroutput"><span class="identifier">UnaryGenerator</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">left_align</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> |
| left aligned in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">left_align</span><span class="special">(</span><span class="identifier">width</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> |
| left aligned in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">left_align</span><span class="special">(</span><span class="identifier">pad</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> |
| left aligned in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (except if the underlying output stream reports an |
| error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">left_align</span><span class="special">(</span><span class="identifier">width</span><span class="special">,</span> <span class="identifier">pad</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> |
| left aligned in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (unless the underlying output stream reports an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">center</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> |
| centered in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">center</span><span class="special">(</span><span class="identifier">width</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> |
| centered in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">center</span><span class="special">(</span><span class="identifier">pad</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> |
| centered in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (except if the underlying output stream reports an |
| error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">center</span><span class="special">(</span><span class="identifier">width</span><span class="special">,</span> |
| <span class="identifier">pad</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> |
| centered in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (unless the underlying output stream reports an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">right_align</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> |
| right aligned in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">right_align</span><span class="special">(</span><span class="identifier">width</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> |
| right aligned in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using <code class="computeroutput"><span class="identifier">space</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded generator <code class="computeroutput"><span class="identifier">a</span></code> |
| does not fail (unless the underlying output stream reports |
| an error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">right_align</span><span class="special">(</span><span class="identifier">pad</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> |
| right aligned in a column of width as defined by the preprocessor |
| constant <code class="computeroutput"><span class="identifier">BOOST_KARMA_DEFAULT_FIELD_LENGTH</span></code> |
| (default: 10), while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (except if the underlying output stream reports an |
| error). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">right_align</span><span class="special">(</span><span class="identifier">width</span><span class="special">,</span> <span class="identifier">pad</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> |
| right aligned in a column of the given <code class="computeroutput"><span class="identifier">width</span></code>, |
| while using the generator <code class="computeroutput"><span class="identifier">pad</span></code> |
| to emit the necessary padding. This generator succeeds as long |
| as its embedded and padding generators <code class="computeroutput"><span class="identifier">a</span></code> |
| and <code class="computeroutput"><span class="identifier">pad</span></code> do |
| not fail (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> |
| None of the generator directives listed above limits the emitted output |
| to the respective column width. If the emitted output is longer than |
| the specified (or implied) column width, the generated output overruns |
| the column to the right. |
| </p> |
| <p> |
| If the output needs to be limited to a specified column width, use |
| the <code class="computeroutput"><span class="identifier">maxwidth</span><span class="special">[]</span></code> |
| directive, for instance: |
| </p> |
| <pre class="programlisting"><span class="identifier">maxwidth</span><span class="special">(</span><span class="number">8</span><span class="special">)[</span><span class="identifier">right_align</span><span class="special">(</span><span class="number">12</span><span class="special">)[</span><span class="string">"1234567890"</span><span class="special">]]</span> |
| </pre> |
| <p> |
| which will output (without the quotes): |
| </p> |
| <pre class="programlisting"><span class="string">" 123456"</span></pre> |
| <p> |
| </p> |
| </td></tr> |
| </table></div> |
| <a name="spirit.karma.reference.directive.alignment.attributes"></a><h6> |
| <a name="id1036415"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.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">left_align</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">left_align</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">left_align</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">left_align</span><span class="special">(</span><span class="identifier">width</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">left_align</span><span class="special">(</span><span class="identifier">width</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">left_align</span><span class="special">(</span><span class="identifier">width</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">left_align</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">left_align</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">left_align</span><span class="special">(</span><span class="identifier">pad</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">left_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">left_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">left_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">center</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">center</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">center</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">center</span><span class="special">(</span><span class="identifier">width</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">center</span><span class="special">(</span><span class="identifier">width</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">center</span><span class="special">(</span><span class="identifier">width</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">center</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">center</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">center</span><span class="special">(</span><span class="identifier">pad</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">center</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> |
| <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">center</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">center</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">right_align</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">right_align</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">right_align</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">right_align</span><span class="special">(</span><span class="identifier">width</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">right_align</span><span class="special">(</span><span class="identifier">width</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">right_align</span><span class="special">(</span><span class="identifier">width</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">right_align</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">right_align</span><span class="special">(</span><span class="identifier">pad</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">right_align</span><span class="special">(</span><span class="identifier">pad</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">right_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">right_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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">pad</span><span class="special">:</span> <span class="identifier">Pad</span> <span class="special">--></span> <span class="identifier">right_align</span><span class="special">(</span><span class="identifier">pad</span><span class="special">,</span> <span class="identifier">width</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.alignment.complexity"></a><h6> |
| <a name="id1038379"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.complexity">Complexity</a> |
| </h6> |
| <div class="blockquote"><blockquote class="blockquote"><p> |
| The overall complexity of the alignment generator directives is defined |
| by the complexity of its embedded and padding generator. The complexity |
| of the left alignment directive generator itself is O(1). The complexity |
| of the center and right alignment directive generators itself is O(N). |
| where <code class="computeroutput"><span class="identifier">N</span></code> is the number |
| of characters emitted by the embedded and padding generators. |
| </p></blockquote></div> |
| <a name="spirit.karma.reference.directive.alignment.example"></a><h6> |
| <a name="id1038406"></a> |
| <a class="link" href="alignment.html#spirit.karma.reference.directive.alignment.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">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">karma</span><span class="special">::</span><span class="identifier">left_align</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">center</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">right_align</span><span class="special">;</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| Basic usage of the alignment generators: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> <span class="identifier">p</span> <span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">"1.0 |2.0"</span><span class="special">,</span> <span class="identifier">left_align</span><span class="special">(</span><span class="number">8</span><span class="special">)[</span><span class="identifier">double_</span><span class="special">]</span> <span class="special"><<</span> <span class="char">'|'</span> <span class="special"><<</span> <span class="identifier">double_</span><span class="special">,</span> <span class="identifier">p</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">" 1.0 |2.0"</span><span class="special">,</span> <span class="identifier">center</span><span class="special">(</span><span class="number">8</span><span class="special">)[</span><span class="identifier">double_</span><span class="special">]</span> <span class="special"><<</span> <span class="char">'|'</span> <span class="special"><<</span> <span class="identifier">double_</span><span class="special">,</span> <span class="identifier">p</span><span class="special">);</span> |
| <span class="identifier">test_generator_attr</span><span class="special">(</span><span class="string">" 1.0|2.0"</span><span class="special">,</span> <span class="identifier">right_align</span><span class="special">(</span><span class="number">8</span><span class="special">)[</span><span class="identifier">double_</span><span class="special">]</span> <span class="special"><<</span> <span class="char">'|'</span> <span class="special"><<</span> <span class="identifier">double_</span><span class="special">,</span> <span class="identifier">p</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"> |
| <a accesskey="p" href="../directive.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="repeat.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
