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<p>C++ API: Common ICU base class UObject.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="utypes_8h_source.html">unicode/utypes.h</a>&quot;</code><br/>
</div>
<p><a href="uobject_8h_source.html">Go to the source code of this file.</a></p>
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UMemory.html">icu::UMemory</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="classicu_1_1UMemory.html" title="UMemory is the common ICU base class. ">UMemory</a> is the common ICU base class.  <a href="classicu_1_1UMemory.html#details">More...</a><br/></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UObject.html">icu::UObject</a></td></tr>
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<tr class="memdesc:namespaceicu"><td class="mdescLeft">&#160;</td><td class="mdescRight">File <a class="el" href="coll_8h.html" title="C++ API: Collation Service. ">coll.h</a>. <br/></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:a0415b3e188980bcb82e31c091265f34b"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uobject_8h.html#a0415b3e188980bcb82e31c091265f34b">UOBJECT_DEFINE_RTTI_IMPLEMENTATION</a>(myClass)</td></tr>
<tr class="memdesc:a0415b3e188980bcb82e31c091265f34b"><td class="mdescLeft">&#160;</td><td class="mdescRight">This is a simple macro to add ICU RTTI to an ICU object implementation.  <a href="#a0415b3e188980bcb82e31c091265f34b">More...</a><br/></td></tr>
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<tr class="memitem:aa53bdd883d784e4c951b051faffc29d0"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uobject_8h.html#aa53bdd883d784e4c951b051faffc29d0">UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION</a>(myClass)</td></tr>
<tr class="memdesc:aa53bdd883d784e4c951b051faffc29d0"><td class="mdescLeft">&#160;</td><td class="mdescRight">This macro adds ICU RTTI to an ICU abstract class implementation.  <a href="#aa53bdd883d784e4c951b051faffc29d0">More...</a><br/></td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:a22af10545208a455a6e884008df48e9f"><td class="memItemLeft" align="right" valign="top">typedef void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a></td></tr>
<tr class="memdesc:a22af10545208a455a6e884008df48e9f"><td class="mdescLeft">&#160;</td><td class="mdescRight">UClassID is used to identify classes without using the compiler's RTTI.  <a href="#a22af10545208a455a6e884008df48e9f">More...</a><br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>C++ API: Common ICU base class UObject. </p>

<p>Definition in file <a class="el" href="uobject_8h_source.html">uobject.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
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          <td class="memname">#define UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION</td>
          <td>(</td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">myClass</td><td>)</td>
          <td></td>
        </tr>
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<b>Value:</b><div class="fragment"><div class="line"><a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> U_EXPORT2 myClass::getStaticClassID() { \</div>
<div class="line">        static <span class="keywordtype">char</span> classID = 0; \</div>
<div class="line">        return (<a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>)&amp;classID; \</div>
<div class="line">    }</div>
<div class="ttc" id="uobject_8h_html_a22af10545208a455a6e884008df48e9f"><div class="ttname"><a href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a></div><div class="ttdeci">void * UClassID</div><div class="ttdoc">UClassID is used to identify classes without using the compiler&#39;s RTTI. </div><div class="ttdef"><b>Definition:</b> <a href="uobject_8h_source.html#l00091">uobject.h:91</a></div></div>
</div><!-- fragment -->
<p>This macro adds ICU RTTI to an ICU abstract class implementation. </p>
<p>This macro should be invoked in *.cpp files. The corresponding header should declare getStaticClassID.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">myClass</td><td>The name of the class that needs RTTI defined. </td></tr>
  </table>
  </dd>
</dl>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000181">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. </dd></dl>

<p>Definition at line <a class="el" href="uobject_8h_source.html#l00310">310</a> of file <a class="el" href="uobject_8h_source.html">uobject.h</a>.</p>

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          <td class="memname">#define UOBJECT_DEFINE_RTTI_IMPLEMENTATION</td>
          <td>(</td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">myClass</td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> U_EXPORT2 myClass::getStaticClassID() { \</div>
<div class="line">        static <span class="keywordtype">char</span> classID = 0; \</div>
<div class="line">        return (<a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>)&amp;classID; \</div>
<div class="line">    } <a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">\</a></div>
<div class="line"><a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">    UClassID</a> myClass::getDynamicClassID() const \</div>
<div class="line">    { <span class="keywordflow">return</span> myClass::getStaticClassID(); }</div>
<div class="ttc" id="uobject_8h_html_a22af10545208a455a6e884008df48e9f"><div class="ttname"><a href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a></div><div class="ttdeci">void * UClassID</div><div class="ttdoc">UClassID is used to identify classes without using the compiler&#39;s RTTI. </div><div class="ttdef"><b>Definition:</b> <a href="uobject_8h_source.html#l00091">uobject.h:91</a></div></div>
</div><!-- fragment -->
<p>This is a simple macro to add ICU RTTI to an ICU object implementation. </p>
<p>This does not go into the header. This should only be used in *.cpp files.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">myClass</td><td>The name of the class that needs RTTI defined. </td></tr>
  </table>
  </dd>
</dl>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000180">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. </dd></dl>

<p>Definition at line <a class="el" href="uobject_8h_source.html#l00293">293</a> of file <a class="el" href="uobject_8h_source.html">uobject.h</a>.</p>

</div>
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<h2 class="groupheader">Typedef Documentation</h2>
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          <td class="memname">typedef void* <a class="el" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a></td>
        </tr>
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<p>UClassID is used to identify classes without using the compiler's RTTI. </p>
<p>This was used before C++ compilers consistently supported RTTI. ICU 4.6 requires compiler RTTI to be turned on.</p>
<p>Each class hierarchy which needs to implement polymorphic clone() or <a class="el" href="namespaceicu.html#a1c2f6ca43e636f38d1a3291eb851e9f0" title="Global operator == for StringPiece. ">operator==()</a> defines two methods, described in detail below. UClassID values can be compared using <a class="el" href="namespaceicu.html#a1c2f6ca43e636f38d1a3291eb851e9f0" title="Global operator == for StringPiece. ">operator==()</a>. Nothing else should be done with them.</p>
<dl class="section user"><dt></dt><dd>In class hierarchies that implement "poor man's RTTI", each concrete subclass implements getDynamicClassID() in the same way:</dd></dl>
<div class="fragment"><div class="line"><span class="keyword">class </span>Derived {</div>
<div class="line"><span class="keyword">public</span>:</div>
<div class="line">    <span class="keyword">virtual</span> <a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> getDynamicClassID()<span class="keyword"> const</span></div>
<div class="line"><span class="keyword">      </span>{ <span class="keywordflow">return</span> Derived::getStaticClassID(); }</div>
<div class="line">}</div>
</div><!-- fragment --><p>Each concrete class implements getStaticClassID() as well, which allows clients to test for a specific type.</p>
<div class="fragment"><div class="line"><span class="keyword">class </span>Derived {</div>
<div class="line"><span class="keyword">public</span>:</div>
<div class="line">    <span class="keyword">static</span> <a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> U_EXPORT2 getStaticClassID();</div>
<div class="line"><span class="keyword">private</span>:</div>
<div class="line">    <span class="keyword">static</span> <span class="keywordtype">char</span> fgClassID;</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="comment">// In Derived.cpp:</span></div>
<div class="line"><a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> Derived::getStaticClassID()</div>
<div class="line">  { <span class="keywordflow">return</span> (<a class="code" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>)&amp;Derived::fgClassID; }</div>
<div class="line"><span class="keywordtype">char</span> Derived::fgClassID = 0; <span class="comment">// Value is irrelevant</span></div>
</div><!-- fragment --> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable002135">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p>Definition at line <a class="el" href="uobject_8h_source.html#l00091">91</a> of file <a class="el" href="uobject_8h_source.html">uobject.h</a>.</p>

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