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  25 <div class="section boost_icl_examples_dynamic_interval" lang="en">
  26 <div class="titlepage"><div><div><h3 class="title">
  27 <a name="boost_icl.examples.dynamic_interval"></a><a class="link" href="dynamic_interval.html" title="Dynamic interval">Dynamic interval</a>
  28 </h3></div></div></div>
  29 <p>
  30         </p>
  31 <p>
  32
  33 </p>
  34 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
  35 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;</span>
  36 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">math</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
  37 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">is_same</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  38
  39 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">interval_set</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  40 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">split_interval_set</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  41 <span class="comment">// Dynamically bounded intervals 'discrete_interval' and 'continuous_interval'
  42 </span><span class="comment">// are indirectly included via interval containers as library defaults.
  43 </span><span class="preprocessor">#include</span> <span class="string">"../toytime.hpp"</span>
  44 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">rational</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  45
  46 <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span>
  47 <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">;</span>
  48 <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">icl</span><span class="special">;</span>
  49
  50 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
  51 <span class="special">{</span>
  52     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"&gt;&gt;Interval Container Library: Sample interval.cpp &lt;&lt;\n"</span><span class="special">;</span>
  53     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----------------------------------------------------\n"</span><span class="special">;</span>
  54
  55     <span class="comment">// Dynamically bounded intervals are the library default for
  56 </span>    <span class="comment">// interval parameters in interval containers.
  57 </span>    <span class="identifier">BOOST_STATIC_ASSERT</span><span class="special">((</span>
  58         <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special">&lt;</span> <span class="identifier">interval_set</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">interval_type</span>
  59                       <span class="special">,</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">value</span>
  60                       <span class="special">));</span>
  61
  62
  63     <span class="identifier">BOOST_STATIC_ASSERT</span><span class="special">((</span>
  64         <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special">&lt;</span> <span class="identifier">interval_set</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;::</span><span class="identifier">interval_type</span>
  65                       <span class="special">,</span> <span class="identifier">continuous_interval</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">value</span>
  66                       <span class="special">));</span>
  67
  68     <span class="comment">// As we can see the library default chooses the appropriate
  69 </span>    <span class="comment">// class template instance discrete_interval&lt;T&gt; or continuous_interval&lt;T&gt;
  70 </span>    <span class="comment">// dependent on the domain_type T. The library default for intervals
  71 </span>    <span class="comment">// is also available via the template 'interval':
  72 </span>    <span class="identifier">BOOST_STATIC_ASSERT</span><span class="special">((</span>
  73         <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special">&lt;</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span>
  74                       <span class="special">,</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">value</span>
  75                       <span class="special">));</span>
  76
  77     <span class="identifier">BOOST_STATIC_ASSERT</span><span class="special">((</span>
  78         <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_same</span><span class="special">&lt;</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;::</span><span class="identifier">type</span>
  79                       <span class="special">,</span> <span class="identifier">continuous_interval</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">value</span>
  80                       <span class="special">));</span>
  81
  82     <span class="comment">// template interval also provides static functions for the four border types
  83 </span>
  84     <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span>    <span class="identifier">int_interval</span>  <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span><span class="number">3</span><span class="special">,</span> <span class="number">7</span><span class="special">);</span>
  85     <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">sqrt_interval</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">1</span><span class="special">/</span><span class="identifier">sqrt</span><span class="special">(</span><span class="number">2.0</span><span class="special">),</span> <span class="identifier">sqrt</span><span class="special">(</span><span class="number">2.0</span><span class="special">));</span>
  86     <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">city_interval</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;::</span><span class="identifier">left_open</span><span class="special">(</span><span class="string">"Barcelona"</span><span class="special">,</span> <span class="string">"Boston"</span><span class="special">);</span>
  87     <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">Time</span><span class="special">&gt;::</span><span class="identifier">type</span>   <span class="identifier">time_interval</span> <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">Time</span><span class="special">&gt;::</span><span class="identifier">open</span><span class="special">(</span><span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span><span class="number">8</span><span class="special">,</span><span class="number">30</span><span class="special">),</span> <span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span><span class="number">17</span><span class="special">,</span><span class="number">20</span><span class="special">));</span>
  88
  89     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Dynamically bounded intervals ----------------------------------------\n"</span><span class="special">;</span>
  90     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"  discrete_interval&lt;int&gt;   : "</span> <span class="special">&lt;&lt;</span> <span class="identifier">int_interval</span>  <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
  91     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"continuous_interval&lt;double&gt;: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">sqrt_interval</span> <span class="special">&lt;&lt;</span> <span class="string">" does "</span>
  92                                             <span class="special">&lt;&lt;</span> <span class="identifier">string</span><span class="special">(</span><span class="identifier">contains</span><span class="special">(</span><span class="identifier">sqrt_interval</span><span class="special">,</span> <span class="identifier">sqrt</span><span class="special">(</span><span class="number">2.0</span><span class="special">))?</span><span class="string">""</span><span class="special">:</span><span class="string">"NOT"</span><span class="special">)</span>
  93                                             <span class="special">&lt;&lt;</span> <span class="string">" contain sqrt(2)"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
  94     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"continuous_interval&lt;string&gt;: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">city_interval</span> <span class="special">&lt;&lt;</span> <span class="string">" does "</span>
  95                                             <span class="special">&lt;&lt;</span> <span class="identifier">string</span><span class="special">(</span><span class="identifier">contains</span><span class="special">(</span><span class="identifier">city_interval</span><span class="special">,</span><span class="string">"Barcelona"</span><span class="special">)?</span><span class="string">""</span><span class="special">:</span><span class="string">"NOT"</span><span class="special">)</span>
  96                                             <span class="special">&lt;&lt;</span> <span class="string">" contain 'Barcelona'"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
  97     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"continuous_interval&lt;string&gt;: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">city_interval</span> <span class="special">&lt;&lt;</span> <span class="string">" does "</span>
  98                                             <span class="special">&lt;&lt;</span> <span class="identifier">string</span><span class="special">(</span><span class="identifier">contains</span><span class="special">(</span><span class="identifier">city_interval</span><span class="special">,</span> <span class="string">"Berlin"</span><span class="special">)?</span><span class="string">""</span><span class="special">:</span><span class="string">"NOT"</span><span class="special">)</span>
  99                                             <span class="special">&lt;&lt;</span> <span class="string">" contain 'Berlin'"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
 100     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"  discrete_interval&lt;Time&gt;  : "</span> <span class="special">&lt;&lt;</span> <span class="identifier">time_interval</span> <span class="special">&lt;&lt;</span> <span class="string">"\n\n"</span><span class="special">;</span>
 101
 102     <span class="comment">// Using dynamically bounded intervals allows to apply operations
 103 </span>    <span class="comment">// with intervals and also with elements on all interval containers
 104 </span>    <span class="comment">// including interval containers of continuous domain types:
 105 </span>
 106     <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">unit_interval</span>
 107         <span class="special">=</span> <span class="identifier">interval</span><span class="special">&lt;</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">0</span><span class="special">),</span> <span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">1</span><span class="special">));</span>
 108     <span class="identifier">interval_set</span><span class="special">&lt;</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">unit_set</span><span class="special">(</span><span class="identifier">unit_interval</span><span class="special">);</span>
 109     <span class="identifier">interval_set</span><span class="special">&lt;</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">ratio_set</span><span class="special">(</span><span class="identifier">unit_set</span><span class="special">);</span>
 110     <span class="identifier">ratio_set</span> <span class="special">-=</span> <span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">1</span><span class="special">,</span><span class="number">3</span><span class="special">);</span> <span class="comment">// Subtract 1/3 from the set
 111 </span>
 112     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Manipulation of single values in continuous sets ---------------------\n"</span><span class="special">;</span>
 113     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"1/3 subtracted from [0..1) : "</span> <span class="special">&lt;&lt;</span> <span class="identifier">ratio_set</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
 114     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"The set does "</span> <span class="special">&lt;&lt;</span> <span class="identifier">string</span><span class="special">(</span><span class="identifier">contains</span><span class="special">(</span><span class="identifier">ratio_set</span><span class="special">,</span> <span class="identifier">rational</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">1</span><span class="special">,</span><span class="number">3</span><span class="special">))?</span><span class="string">""</span><span class="special">:</span><span class="string">"NOT"</span><span class="special">)</span>
 115                                             <span class="special">&lt;&lt;</span> <span class="string">" contain '1/3'"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
 116     <span class="identifier">ratio_set</span> <span class="special">^=</span> <span class="identifier">unit_set</span><span class="special">;</span>
 117     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Flipping the holey set     : "</span> <span class="special">&lt;&lt;</span> <span class="identifier">ratio_set</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
 118     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"yields the subtracted      :     1/3\n\n"</span><span class="special">;</span>
 119
 120     <span class="comment">// Of course we can use interval types that are different from the
 121 </span>    <span class="comment">// library default by explicit instantiation:
 122 </span>    <span class="identifier">split_interval_set</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">,</span> <span class="identifier">closed_interval</span><span class="special">&lt;</span><span class="identifier">Time</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">intuitive_times</span><span class="special">;</span>
 123     <span class="comment">// Interval set 'intuitive_times' uses statically bounded closed intervals
 124 </span>    <span class="identifier">intuitive_times</span> <span class="special">+=</span> <span class="identifier">closed_interval</span><span class="special">&lt;</span><span class="identifier">Time</span><span class="special">&gt;(</span><span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span>  <span class="number">9</span><span class="special">,</span><span class="number">00</span><span class="special">),</span> <span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span> <span class="number">10</span><span class="special">,</span><span class="number">59</span><span class="special">));</span>
 125     <span class="identifier">intuitive_times</span> <span class="special">+=</span> <span class="identifier">closed_interval</span><span class="special">&lt;</span><span class="identifier">Time</span><span class="special">&gt;(</span><span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span> <span class="number">10</span><span class="special">,</span><span class="number">00</span><span class="special">),</span> <span class="identifier">Time</span><span class="special">(</span><span class="identifier">monday</span><span class="special">,</span> <span class="number">11</span><span class="special">,</span><span class="number">59</span><span class="special">));</span>
 126     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Here we are NOT using the library default for intervals --------------\n"</span><span class="special">;</span>
 127     <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">intuitive_times</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
 128
 129     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 130 <span class="special">}</span>
 131
 132 <span class="comment">// Program output:
 133 </span><span class="comment">//&gt;&gt;Interval Container Library: Sample interval.cpp &lt;&lt;
 134 </span><span class="comment">//----------------------------------------------------
 135 </span><span class="comment">//----- Dynamically bounded intervals ----------------------------------------
 136 </span><span class="comment">//  discrete_interval&lt;int&gt;   : [3,7]
 137 </span><span class="comment">//continuous_interval&lt;double&gt;: [0.707107,1.41421) does NOT contain sqrt(2)
 138 </span><span class="comment">//continuous_interval&lt;string&gt;: (Barcelona,Boston] does NOT contain 'Barcelona'
 139 </span><span class="comment">//continuous_interval&lt;string&gt;: (Barcelona,Boston] does  contain 'Berlin'
 140 </span><span class="comment">//  discrete_interval&lt;Time&gt;  : (mon:08:30,mon:17:20)
 141 </span><span class="comment">//
 142 </span><span class="comment">//----- Manipulation of single values in continuous sets ---------------------
 143 </span><span class="comment">//1/3 subtracted from [0..1) : {[0/1,1/3)(1/3,1/1)}
 144 </span><span class="comment">//The set does NOT contain '1/3'
 145 </span><span class="comment">//Flipping the holey set     : {[1/3,1/3]}
 146 </span><span class="comment">//yields the subtracted      :     1/3
 147 </span><span class="comment">//
 148 </span><span class="comment">//----- Here we are NOT using the library default for intervals --------------
 149 </span><span class="comment">//{[mon:09:00,mon:09:59][mon:10:00,mon:10:59][mon:11:00,mon:11:59]}
 150 </span></pre>
 151 <p>
 152         </p>
 153 <p>
 154       </p>
 155 </div>
 156 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 157 <td align="left"></td>
 158 <td align="right"><div class="copyright-footer">Copyright &#169; 2007 -2010 Joachim Faulhaber<br>Copyright &#169; 1999 -2006 Cortex Software GmbH<p>
 159         Distributed under the Boost Software License, Version 1.0. (See accompanying
 160         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>)
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