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| <a name="boost.date_time.period_parser"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Class template period_parser</span></h2> |
| <p>boost::date_time::period_parser — Not a facet, but a class used to specify and control period parsing. </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="../../date_time/doxy.html#header.boost.date_time.period_parser_hpp" title="Header <boost/date_time/period_parser.hpp>">boost/date_time/period_parser.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> date_type<span class="special">,</span> <span class="keyword">typename</span> CharT<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="period_parser.html" title="Class template period_parser">period_parser</a> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span> <span class="identifier">CharT</span> <span class="special">></span> <a name="boost.date_time.period_parser.string_type"></a><span class="identifier">string_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">CharT</span> <a name="boost.date_time.period_parser.char_type"></a><span class="identifier">char_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">istreambuf_iterator</span><span class="special"><</span> <span class="identifier">CharT</span> <span class="special">></span> <a name="boost.date_time.period_parser.stream_itr_type"></a><span class="identifier">stream_itr_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="string_parse_tree.html" title="Struct template string_parse_tree">string_parse_tree</a><span class="special"><</span> <span class="identifier">CharT</span> <span class="special">></span> <a name="boost.date_time.period_parser.parse_tree_type"></a><span class="identifier">parse_tree_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">parse_tree_type</span><span class="special">::</span><span class="identifier">parse_match_result_type</span> <a name="boost.date_time.period_parser.match_results"></a><span class="identifier">match_results</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span> <span class="identifier">CharT</span> <span class="special">></span> <span class="special">></span> <a name="boost.date_time.period_parser.collection_type"></a><span class="identifier">collection_type</span><span class="special">;</span> |
| |
| <span class="keyword">enum</span> <a name="boost.date_time.period_parser.period_range_option"></a>period_range_option <span class="special">{</span> AS_OPEN_RANGE, AS_CLOSED_RANGE <span class="special">}</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="period_parser.html#boost.date_time.period_parserconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="period_parser.html#id383521-bb"><span class="identifier">period_parser</span></a><span class="special">(</span><span class="identifier">period_range_option</span> <span class="special">=</span> <span class="identifier">AS_CLOSED_RANGE</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> <span class="special">=</span> <span class="identifier">default_period_separator</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> <span class="special">=</span> <span class="identifier">default_period_start_delimeter</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> <span class="special">=</span> <span class="identifier">default_period_open_range_end_delimeter</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> <span class="special">=</span> <span class="identifier">default_period_closed_range_end_delimeter</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="period_parser.html#id397763-bb"><span class="identifier">period_parser</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="period_parser.html" title="Class template period_parser">period_parser</a><span class="special"><</span> <span class="identifier">date_type</span><span class="special">,</span> <span class="identifier">CharT</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="period_parser.html#id364574-bb">public member functions</a></span> |
| <span class="identifier">period_range_option</span> <a class="link" href="period_parser.html#id364578-bb"><span class="identifier">range_option</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="period_parser.html#id364586-bb"><span class="identifier">range_option</span></a><span class="special">(</span><span class="identifier">period_range_option</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">collection_type</span> <a class="link" href="period_parser.html#id364600-bb"><span class="identifier">delimiter_strings</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="period_parser.html#id364608-bb"><span class="identifier">delimiter_strings</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> period_type<span class="special">,</span> <span class="keyword">typename</span> duration_type<span class="special">,</span> <span class="keyword">typename</span> facet_type<span class="special">></span> |
| <span class="identifier">period_type</span> <a class="link" href="period_parser.html#id414141-bb"><span class="identifier">get_period</span></a><span class="special">(</span><span class="identifier">stream_itr_type</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">stream_itr_type</span> <span class="special">&</span><span class="special">,</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">ios_base</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">period_type</span> <span class="special">&</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">duration_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">facet_type</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="period_parser.html#id358860-bb">private member functions</a></span> |
| <span class="keyword">void</span> <a class="link" href="period_parser.html#id358863-bb"><span class="identifier">consume_delim</span></a><span class="special">(</span><span class="identifier">stream_itr_type</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">stream_itr_type</span> <span class="special">&</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">char_type</span> default_period_separator<span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">char_type</span> default_period_start_delimeter<span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">char_type</span> default_period_open_range_end_delimeter<span class="special">;</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">char_type</span> default_period_closed_range_end_delimeter<span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id1157856"></a><h2>Description</h2> |
| <p>Provides settings for the following:</p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"><p>period_separator -- default '/'</p></li> |
| <li class="listitem"><p>period_open_start_delimeter -- default '['</p></li> |
| <li class="listitem"><p>period_open_range_end_delimeter -- default ')'</p></li> |
| <li class="listitem"><p>period_closed_range_end_delimeter -- default ']'</p></li> |
| <li class="listitem"><p>display_as_open_range, display_as_closed_range -- default closed_range</p></li> |
| </ul></div> |
| <p> |
| </p> |
| <p>For a typical date_period, the contents of the input stream would be </p> |
| <pre class="programlisting"> <span class="special">[</span><span class="number">2004</span><span class="special">-</span><span class="identifier">Jan</span><span class="special">-</span><span class="number">04</span><span class="special">/</span><span class="number">2004</span><span class="special">-</span><span class="identifier">Feb</span><span class="special">-</span><span class="number">01</span><span class="special">]</span> |
| <span class="special">*</span> |
| </pre> |
| <p> where the date format is controlled by the date facet </p> |
| <div class="refsect2"> |
| <a name="id1157959"></a><h3> |
| <a name="boost.date_time.period_parserconstruct-copy-destruct"></a><code class="computeroutput">period_parser</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="id383521-bb"></a><span class="identifier">period_parser</span><span class="special">(</span><span class="identifier">period_range_option</span> range_opt <span class="special">=</span> <span class="identifier">AS_CLOSED_RANGE</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> period_separator <span class="special">=</span> <span class="identifier">default_period_separator</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> period_start_delimeter <span class="special">=</span> <span class="identifier">default_period_start_delimeter</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> period_open_range_end_delimeter <span class="special">=</span> <span class="identifier">default_period_open_range_end_delimeter</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">char_type</span> <span class="special">*</span><span class="keyword">const</span> period_closed_range_end_delimeter <span class="special">=</span> <span class="identifier">default_period_closed_range_end_delimeter</span><span class="special">)</span><span class="special">;</span></pre>Constructor that sets up period parser options. </li> |
| <li class="listitem"><pre class="literallayout"><a name="id397763-bb"></a><span class="identifier">period_parser</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="period_parser.html" title="Class template period_parser">period_parser</a><span class="special"><</span> <span class="identifier">date_type</span><span class="special">,</span> <span class="identifier">CharT</span> <span class="special">></span> <span class="special">&</span> p_parser<span class="special">)</span><span class="special">;</span></pre></li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id1158249"></a><h3> |
| <a name="id364574-bb"></a><code class="computeroutput">period_parser</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"><pre class="literallayout"><span class="identifier">period_range_option</span> <a name="id364578-bb"></a><span class="identifier">range_option</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="id364586-bb"></a><span class="identifier">range_option</span><span class="special">(</span><span class="identifier">period_range_option</span> option<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><span class="identifier">collection_type</span> <a name="id364600-bb"></a><span class="identifier">delimiter_strings</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="id364608-bb"></a><span class="identifier">delimiter_strings</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span> separator<span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span> start_delim<span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span> open_end_delim<span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span> closed_end_delim<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> period_type<span class="special">,</span> <span class="keyword">typename</span> duration_type<span class="special">,</span> <span class="keyword">typename</span> facet_type<span class="special">></span> |
| <span class="identifier">period_type</span> <a name="id414141-bb"></a><span class="identifier">get_period</span><span class="special">(</span><span class="identifier">stream_itr_type</span> <span class="special">&</span> sitr<span class="special">,</span> <span class="identifier">stream_itr_type</span> <span class="special">&</span> stream_end<span class="special">,</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">ios_base</span> <span class="special">&</span> a_ios<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">period_type</span> <span class="special">&</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">duration_type</span> <span class="special">&</span> dur_unit<span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">facet_type</span> <span class="special">&</span> facet<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Generic code to parse a period -- no matter the period type. <p>This generic code will parse any period using a facet to to get the 'elements'. For example, in the case of a date_period the elements will be instances of a date which will be parsed according the to setup in the passed facet parameter.</p> |
| <p>The steps for parsing a period are always the same:</p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"><p>consume the start delimiter</p></li> |
| <li class="listitem"><p>get start element</p></li> |
| <li class="listitem"><p>consume the separator</p></li> |
| <li class="listitem"><p>get either last or end element depending on range settings</p></li> |
| <li class="listitem"><p>consume the end delimeter depending on range settings</p></li> |
| </ul></div> |
| <p> |
| </p> |
| <p>Thus for a typical date period the contents of the input stream might look like this: </p> |
| <pre class="programlisting"> [March 01, 2004/June 07, 2004] <-- closed range |
| [March 01, 2004/June 08, 2004) <-- open range |
| |
| * |
| </pre> |
| <p> </p> |
| </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id1158762"></a><h3> |
| <a name="id358860-bb"></a><code class="computeroutput">period_parser</code> private member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="id358863-bb"></a><span class="identifier">consume_delim</span><span class="special">(</span><span class="identifier">stream_itr_type</span> <span class="special">&</span> sitr<span class="special">,</span> <span class="identifier">stream_itr_type</span> <span class="special">&</span> stream_end<span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">string_type</span> <span class="special">&</span> delim<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>throws ios_base::failure if delimiter and parsed data do not match </li></ol></div> |
| </div> |
| </div> |
| </div> |
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| <td align="right"><div class="copyright-footer">Copyright © 2001-2005 CrystalClear Software, Inc<p>Subject to 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> |
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