<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Class options_description</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../../program_options/reference.html#header.boost.program_options.options_description_hpp" title="Header <boost/program_options/options_description.hpp>"> <link rel="prev" href="option_description.html" title="Class option_description"> <link rel="next" href="options__idm45506977779488.html" title="Class options_description_easy_init"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img 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alt="Next"></a> </div> <div class="refentry"> <a name="boost.program_options.options_description"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Class options_description</span></h2> <p>boost::program_options::options_description</p> </div> <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../program_options/reference.html#header.boost.program_options.options_description_hpp" title="Header <boost/program_options/options_description.hpp>">boost/program_options/options_description.hpp</a>> </span> <span class="keyword">class</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">{</span> <span class="keyword">public</span><span class="special">:</span> <span class="comment">// <a class="link" href="options_description.html#boost.program_options.options_descriptionconstruct-copy-destruct">construct/copy/destruct</a></span> <a class="link" href="options_description.html#idm45507158343392-bb"><span class="identifier">options_description</span></a><span class="special">(</span><span class="keyword">unsigned</span> <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">/</span><span class="number">2</span><span class="special">)</span><span class="special">;</span> <a class="link" href="options_description.html#idm45507154781888-bb"><span class="identifier">options_description</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">/</span><span class="number">2</span><span class="special">)</span><span class="special">;</span> <span class="comment">// <a class="link" href="options_description.html#idm45506983093008-bb">public member functions</a></span> <span class="keyword">void</span> <a class="link" href="options_description.html#idm45506983092480-bb"><span class="identifier">add</span></a><span class="special">(</span><span class="identifier">shared_ptr</span><span class="special"><</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">></span><span class="special">)</span><span class="special">;</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span> <a class="link" href="options_description.html#idm45507102540960-bb"><span class="identifier">add</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span> <span class="keyword">unsigned</span> <a class="link" href="options_description.html#idm45507160599312-bb"><span class="identifier">get_option_column_width</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <a class="link" href="options__idm45506977779488.html" title="Class options_description_easy_init">options_description_easy_init</a> <a class="link" href="options_description.html#idm45507109023008-bb"><span class="identifier">add_options</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="keyword">const</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">&</span> <a class="link" href="options_description.html#idm45507089364768-bb"><span class="identifier">find</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">const</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">*</span> <a class="link" href="options_description.html#idm45507164595088-bb"><span class="identifier">find_nothrow</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">shared_ptr</span><span class="special"><</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">></span> <span class="special">></span> <span class="special">&</span> <a class="link" href="options_description.html#idm45507091092080-bb"><span class="identifier">options</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">void</span> <a class="link" href="options_description.html#idm45507152799392-bb"><span class="identifier">print</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="comment">// <a class="link" href="options_description.html#idm45507091073728-bb">friend functions</a></span> <span class="keyword">friend</span> <span class="identifier">BOOST_PROGRAM_OPTIONS_DECL</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span> <a class="link" href="options_description.html#idm45507130001232-bb"><span class="keyword">operator</span><span class="special"><<</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span> <span class="comment">// public data members</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="identifier">m_default_line_length</span><span class="special">;</span> <span class="special">}</span><span class="special">;</span></pre></div> <div class="refsect1"> <a name="idm45555216225024"></a><h2>Description</h2> <p>A set of option descriptions. This provides convenient interface for adding new option (the add_options) method, and facilities to search for options by name.</p> <p>See here for option adding interface discussion. </p> <p><span class="bold"><strong>See Also:</strong></span></p> <p><a class="link" href="option_description.html" title="Class option_description">option_description</a> </p> <p> </p> <div class="refsect2"> <a name="idm45555216222048"></a><h3> <a name="boost.program_options.options_descriptionconstruct-copy-destruct"></a><code class="computeroutput">options_description</code> public construct/copy/destruct</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout"><a name="idm45507158343392-bb"></a><span class="identifier">options_description</span><span class="special">(</span><span class="keyword">unsigned</span> line_length <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">,</span> <span class="keyword">unsigned</span> min_description_length <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">/</span><span class="number">2</span><span class="special">)</span><span class="special">;</span></pre> <p>Creates the instance. </p> </li> <li class="listitem"> <pre class="literallayout"><a name="idm45507154781888-bb"></a><span class="identifier">options_description</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> caption<span class="special">,</span> <span class="keyword">unsigned</span> line_length <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">,</span> <span class="keyword">unsigned</span> min_description_length <span class="special">=</span> <span class="identifier">m_default_line_length</span><span class="special">/</span><span class="number">2</span><span class="special">)</span><span class="special">;</span></pre> <p>Creates the instance. The 'caption' parameter gives the name of this '<code class="computeroutput"><a class="link" href="options_description.html" title="Class options_description">options_description</a></code>' instance. Primarily useful for output. The 'description_length' specifies the number of columns that should be reserved for the description text; if the option text encroaches into this, then the description will start on the next line. </p> </li> </ol></div> </div> <div class="refsect2"> <a name="idm45555216195360"></a><h3> <a name="idm45506983093008-bb"></a><code class="computeroutput">options_description</code> public member functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout"><span class="keyword">void</span> <a name="idm45506983092480-bb"></a><span class="identifier">add</span><span class="special">(</span><span class="identifier">shared_ptr</span><span class="special"><</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">></span> desc<span class="special">)</span><span class="special">;</span></pre> <p>Adds new variable description. Throws duplicate_variable_error if either short or long name matches that of already present one. </p> </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span> <a name="idm45507102540960-bb"></a><span class="identifier">add</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span> desc<span class="special">)</span><span class="special">;</span></pre> <p>Adds a group of option description. This has the same effect as adding all option_descriptions in 'desc' individually, except that output operator will show a separate group. Returns *this. </p> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">unsigned</span> <a name="idm45507160599312-bb"></a><span class="identifier">get_option_column_width</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> <p>Find the maximum width of the option column, including options in groups. </p> </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="options__idm45506977779488.html" title="Class options_description_easy_init">options_description_easy_init</a> <a name="idm45507109023008-bb"></a><span class="identifier">add_options</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> <p>Returns an object of implementation-defined type suitable for adding options to <code class="computeroutput"><a class="link" href="options_description.html" title="Class options_description">options_description</a></code>. The returned object will have overloaded operator() with parameter type matching '<code class="computeroutput"><a class="link" href="option_description.html" title="Class option_description">option_description</a></code>' constructors. Calling the operator will create new <code class="computeroutput"><a class="link" href="option_description.html" title="Class option_description">option_description</a></code> instance and add it. </p> </li> <li class="listitem"><pre class="literallayout"><span class="keyword">const</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">&</span> <a name="idm45507089364768-bb"></a><span class="identifier">find</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">,</span> <span class="keyword">bool</span> approx<span class="special">,</span> <span class="keyword">bool</span> long_ignore_case <span class="special">=</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">bool</span> short_ignore_case <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><span class="keyword">const</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">*</span> <a name="idm45507164595088-bb"></a><span class="identifier">find_nothrow</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">,</span> <span class="keyword">bool</span> approx<span class="special">,</span> <span class="keyword">bool</span> long_ignore_case <span class="special">=</span> <span class="keyword">false</span><span class="special">,</span> <span class="keyword">bool</span> short_ignore_case <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">shared_ptr</span><span class="special"><</span> <a class="link" href="option_description.html" title="Class option_description">option_description</a> <span class="special">></span> <span class="special">></span> <span class="special">&</span> <a name="idm45507091092080-bb"></a><span class="identifier">options</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"> <pre class="literallayout"><span class="keyword">void</span> <a name="idm45507152799392-bb"></a><span class="identifier">print</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span> os<span class="special">,</span> <span class="keyword">unsigned</span> width <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> <p>Outputs 'desc' to the specified stream, calling 'f' to output each <code class="computeroutput"><a class="link" href="option_description.html" title="Class option_description">option_description</a></code> element. </p> </li> </ol></div> </div> <div class="refsect2"> <a name="idm45555216108080"></a><h3> <a name="idm45507091073728-bb"></a><code class="computeroutput">options_description</code> friend functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> <pre class="literallayout"><span class="keyword">friend</span> <span class="identifier">BOOST_PROGRAM_OPTIONS_DECL</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span> <a name="idm45507130001232-bb"></a><span class="keyword">operator</span><span class="special"><<</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&</span> os<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="options_description.html" title="Class options_description">options_description</a> <span class="special">&</span> desc<span class="special">)</span><span class="special">;</span></pre> <p>Produces a human readable output of 'desc', listing options, their descriptions and allowed parameters. Other <code class="computeroutput"><a class="link" href="options_description.html" title="Class options_description">options_description</a></code> instances previously passed to add will be output separately. </p> </li></ol></div> </div> </div> </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 © 2002-2004 Vladimir Prus<p>Distributed under the Boost Software License, Version 1.0. (See accompanying file <code class="filename">LICENSE_1_0.txt</code> 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="option_description.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../program_options/reference.html#header.boost.program_options.options_description_hpp"><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="options__idm45506977779488.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>