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| <div class="section" lang="en"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_icl.function_reference.key_types"></a><a class="link" href="key_types.html" title="Key Types">Key Types</a> |
| </h3></div></div></div> |
| <p> |
| In an <span class="bold"><strong>stl</strong></span> map <code class="computeroutput"><span class="identifier">map</span><span class="special"><</span><span class="identifier">K</span><span class="special">,</span><span class="identifier">D</span><span class="special">></span></code> the |
| first parameter type of the map template <code class="computeroutput"><span class="identifier">K</span></code> |
| is called <code class="computeroutput"><span class="identifier">key_type</span></code>. It allows |
| to select key-value pairs pairs via <code class="computeroutput"><span class="identifier">find</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">K</span><span class="special">&)</span></code> and to remove key-value pairs using |
| <code class="computeroutput"><span class="identifier">erase</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">K</span><span class="special">&)</span></code>. For icl Maps we have generalized key |
| types to a larger set of types. Not only the <code class="computeroutput"><span class="identifier">key_type</span></code> |
| (<code class="computeroutput"><span class="identifier">domain_type</span></code>) but also an |
| interval type and a set type can be <span class="emphasis"><em><span class="bold"><strong>key types</strong></span></em></span>, |
| that allow for <span class="emphasis"><em><span class="bold"><strong>selection</strong></span></em></span> |
| and <span class="emphasis"><em><span class="bold"><strong>removal</strong></span></em></span> of map |
| elements segments and submaps. |
| </p> |
| <div class="table"> |
| <a name="id1130583"></a><p class="title"><b>Table 1.16. Selection of elements, segments and sub maps using |
| key types</b></p> |
| <div class="table-contents"><table class="table" summary="Selection of elements, segments and sub maps using |
| key types"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| </p> |
| </th> |
| <th> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#interval_map_types"><span class="bold"><strong>M</strong></span></a>: |
| <code class="computeroutput"><a class="link" href="../../boost/icl/interval_map.html" title="Class template interval_map">interval_maps</a></code> |
| </p> |
| </th> |
| <th> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#itl_map_type"><span class="bold"><strong>m</strong></span></a>: |
| icl_map |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#element_type"><span class="bold"><strong>e</strong></span></a>: |
| <code class="computeroutput"><span class="identifier">domain_type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| key value pair |
| </p> |
| </td> |
| <td> |
| <p> |
| key value pair |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#interval_type"><span class="bold"><strong>i</strong></span></a>: |
| <code class="computeroutput"><span class="identifier">interval_type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| interval value pair |
| </p> |
| </td> |
| <td> |
| <p> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#interval_set_types"><span class="bold"><strong>S</strong></span></a>: |
| <code class="computeroutput"><a class="link" href="../../boost/icl/interval_set.html" title="Class template interval_set">interval_sets</a></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| interval map |
| </p> |
| </td> |
| <td> |
| <p> |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <a class="link" href="../interface/function_synopsis.html#itl_set_type"><span class="bold"><strong>s</strong></span></a>: |
| <a href="http://www.cplusplus.com/reference/stl/set/" target="_top"><code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">set</span></code> </a> |
| </p> |
| </td> |
| <td> |
| <p> |
| </p> |
| </td> |
| <td> |
| <p> |
| interval map |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <br class="table-break"><p> |
| <a class="link" href="subtraction.html" title="Subtraction"><span class="emphasis"><em><span class="bold"><strong>Subtraction</strong></span></em></span></a>, <a class="link" href="erasure.html" title="Erasure"><span class="emphasis"><em><span class="bold"><strong>erasure</strong></span></em></span></a>, <a class="link" href="intersection.html" title="Intersection"><span class="emphasis"><em><span class="bold"><strong>intersection</strong></span></em></span></a> |
| </p> |
| <p> |
| and <a class="link" href="containedness.html" title="Containedness"><span class="emphasis"><em><span class="bold"><strong>containedness</strong></span></em></span></a> predicates can be |
| used with those kinds of key types. For instance, the overload table for |
| intersection |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="comment">// overload tables for |
| </span><span class="identifier">T</span><span class="special">&</span> <span class="keyword">operator</span> <span class="special">&=</span> <span class="special">(</span><span class="identifier">T</span><span class="special">&,</span> <span class="keyword">const</span> <span class="identifier">P</span><span class="special">&)</span> |
| |
| <span class="identifier">element</span> <span class="identifier">containers</span><span class="special">:</span> <span class="identifier">interval</span> <span class="identifier">containers</span><span class="special">:</span> |
| <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">b</span> <span class="identifier">s</span> <span class="identifier">m</span> <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">i</span> <span class="identifier">b</span> <span class="identifier">p</span> <span class="identifier">S</span> <span class="identifier">M</span> |
| <span class="special">---+--------</span> <span class="special">---+------------</span> |
| <span class="identifier">s</span> <span class="special">|</span> <span class="identifier">s</span> <span class="identifier">s</span> <span class="identifier">S</span> <span class="special">|</span> <span class="identifier">S</span> <span class="identifier">S</span> <span class="identifier">S</span> |
| <span class="identifier">m</span> <span class="special">|</span> <span class="identifier">m</span> <span class="identifier">m</span> <span class="identifier">m</span> <span class="identifier">m</span> <span class="identifier">M</span> <span class="special">|</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| has a part that that allows for selection by key objects |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="identifier">element</span> <span class="identifier">containers</span><span class="special">:</span> <span class="identifier">interval</span> <span class="identifier">containers</span><span class="special">:</span> |
| <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">b</span> <span class="identifier">s</span> <span class="identifier">m</span> <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">i</span> <span class="identifier">b</span> <span class="identifier">p</span> <span class="identifier">S</span> <span class="identifier">M</span> |
| <span class="special">---+--------</span> <span class="special">---+------------</span> |
| <span class="identifier">s</span> <span class="special">|</span> <span class="identifier">s</span> <span class="identifier">s</span> <span class="identifier">S</span> <span class="special">|</span> <span class="identifier">S</span> <span class="identifier">S</span> <span class="identifier">S</span> |
| <span class="identifier">m</span> <span class="special">|</span> <span class="identifier">m</span> <span class="identifier">m</span> <span class="identifier">M</span> <span class="special">|</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| and another part that provides overloads for generalized intersection: |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="identifier">element</span> <span class="identifier">containers</span><span class="special">:</span> <span class="identifier">interval</span> <span class="identifier">containers</span><span class="special">:</span> |
| <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">b</span> <span class="identifier">s</span> <span class="identifier">m</span> <span class="special">&=</span> <span class="special">|</span> <span class="identifier">e</span> <span class="identifier">i</span> <span class="identifier">b</span> <span class="identifier">p</span> <span class="identifier">S</span> <span class="identifier">M</span> |
| <span class="special">---+--------</span> <span class="special">---+------------</span> |
| <span class="identifier">s</span> <span class="special">|</span> <span class="identifier">s</span> <span class="identifier">s</span> <span class="identifier">S</span> <span class="special">|</span> <span class="identifier">S</span> <span class="identifier">S</span> <span class="identifier">S</span> |
| <span class="identifier">m</span> <span class="special">|</span> <span class="identifier">m</span> <span class="identifier">m</span> <span class="identifier">M</span> <span class="special">|</span> <span class="identifier">M</span> <span class="identifier">M</span> <span class="identifier">M</span> |
| </pre> |
| <p> |
| </p> |
| <p> |
| For <code class="computeroutput"><span class="identifier">Sets</span></code>, the <span class="emphasis"><em><span class="bold"><strong>key types</strong></span></em></span> defined for maps are identical |
| with the set types themselves. So the distinction between the function groups |
| <span class="emphasis"><em><span class="bold"><strong>selection by key</strong></span></em></span> and |
| <span class="emphasis"><em><span class="bold"><strong>generalized intersection</strong></span></em></span> |
| fall together in the well known <span class="emphasis"><em><span class="bold"><strong>set intersection</strong></span></em></span>. |
| </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 © 2007 -2010 Joachim Faulhaber<br>Copyright © 1999 -2006 Cortex Software GmbH<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> |
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