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<li class="navelem"><a class="el" href="namespaceicu.html">icu</a></li><li class="navelem"><a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a></li>  </ul>
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<p>Base class for 'pure' C++ implementations of uenum api.  
 <a href="classicu_1_1StringEnumeration.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="strenum_8h_source.html">strenum.h</a>&gt;</code></p>
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Inheritance diagram for icu::StringEnumeration:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ac126117d6731f8fffe638d0bd2792cb9"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#ac126117d6731f8fffe638d0bd2792cb9">~StringEnumeration</a> ()</td></tr>
<tr class="memdesc:ac126117d6731f8fffe638d0bd2792cb9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destructor.  <a href="classicu_1_1StringEnumeration.html#ac126117d6731f8fffe638d0bd2792cb9">More...</a><br /></td></tr>
<tr class="separator:ac126117d6731f8fffe638d0bd2792cb9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa7eaf0f49b8ea74a41afdc6d2075f769"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#aa7eaf0f49b8ea74a41afdc6d2075f769">clone</a> () const</td></tr>
<tr class="memdesc:aa7eaf0f49b8ea74a41afdc6d2075f769"><td class="mdescLeft">&#160;</td><td class="mdescRight">Clone this object, an instance of a subclass of <a class="el" href="classicu_1_1StringEnumeration.html" title="Base class for &#39;pure&#39; C++ implementations of uenum api.">StringEnumeration</a>.  <a href="classicu_1_1StringEnumeration.html#aa7eaf0f49b8ea74a41afdc6d2075f769">More...</a><br /></td></tr>
<tr class="separator:aa7eaf0f49b8ea74a41afdc6d2075f769"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a86d5dca1417957f07e59491d91bb4c51"><td class="memItemLeft" align="right" valign="top">virtual int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a86d5dca1417957f07e59491d91bb4c51">count</a> (<a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status) const =0</td></tr>
<tr class="separator:a86d5dca1417957f07e59491d91bb4c51"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab30fc98cec84c5540e9ffbabea8e4891"><td class="memItemLeft" align="right" valign="top">virtual const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next</a> (int32_t *resultLength, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr class="separator:ab30fc98cec84c5540e9ffbabea8e4891"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a722b4fbd8a0278c52953f3d38583ac84"><td class="memItemLeft" align="right" valign="top">virtual const char16_t *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a722b4fbd8a0278c52953f3d38583ac84">unext</a> (int32_t *resultLength, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr class="separator:a722b4fbd8a0278c52953f3d38583ac84"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad9a53215e559b8c4001d472da702bf5c"><td class="memItemLeft" align="right" valign="top">virtual const <a class="el" href="classicu_1_1UnicodeString.html">UnicodeString</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext</a> (<a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr class="separator:ad9a53215e559b8c4001d472da702bf5c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae156678fc4e31fb34415e1e2d296c94d"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#ae156678fc4e31fb34415e1e2d296c94d">reset</a> (<a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)=0</td></tr>
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<tr class="memitem:ae3d0e35c88da704b9b78bb64c7ced09a"><td class="memItemLeft" align="right" valign="top">virtual bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#ae3d0e35c88da704b9b78bb64c7ced09a">operator==</a> (const <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a> &amp;that) const</td></tr>
<tr class="memdesc:ae3d0e35c88da704b9b78bb64c7ced09a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compares this enumeration to other to check if both are equal.  <a href="classicu_1_1StringEnumeration.html#ae3d0e35c88da704b9b78bb64c7ced09a">More...</a><br /></td></tr>
<tr class="separator:ae3d0e35c88da704b9b78bb64c7ced09a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af0bf83132875470266b4aec0b3f8215c"><td class="memItemLeft" align="right" valign="top">virtual bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#af0bf83132875470266b4aec0b3f8215c">operator!=</a> (const <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a> &amp;that) const</td></tr>
<tr class="memdesc:af0bf83132875470266b4aec0b3f8215c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compares this enumeration to other to check if both are not equal.  <a href="classicu_1_1StringEnumeration.html#af0bf83132875470266b4aec0b3f8215c">More...</a><br /></td></tr>
<tr class="separator:af0bf83132875470266b4aec0b3f8215c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classicu_1_1UObject"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classicu_1_1UObject')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classicu_1_1UObject.html">icu::UObject</a></td></tr>
<tr class="memitem:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UObject.html#af10026497704f510d3d1f2eff50acb18">~UObject</a> ()</td></tr>
<tr class="memdesc:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destructor.  <a href="classicu_1_1UObject.html#af10026497704f510d3d1f2eff50acb18">More...</a><br /></td></tr>
<tr class="separator:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aca1169c4978c52ce2b76eda104e9a214 inherit pub_methods_classicu_1_1UObject"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UObject.html#aca1169c4978c52ce2b76eda104e9a214">getDynamicClassID</a> () const</td></tr>
<tr class="memdesc:aca1169c4978c52ce2b76eda104e9a214 inherit pub_methods_classicu_1_1UObject"><td class="mdescLeft">&#160;</td><td class="mdescRight">ICU4C "poor man's RTTI", returns a UClassID for the actual ICU class.  <a href="classicu_1_1UObject.html#aca1169c4978c52ce2b76eda104e9a214">More...</a><br /></td></tr>
<tr class="separator:aca1169c4978c52ce2b76eda104e9a214 inherit pub_methods_classicu_1_1UObject"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:a61478f73b5cf95e969999df44db5a9ab"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a61478f73b5cf95e969999df44db5a9ab">StringEnumeration</a> ()</td></tr>
<tr class="memdesc:a61478f73b5cf95e969999df44db5a9ab"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default constructor for use with default implementations and subclasses.  <a href="classicu_1_1StringEnumeration.html#a61478f73b5cf95e969999df44db5a9ab">More...</a><br /></td></tr>
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<tr class="memitem:a7b17d1df2dc64b8e3d56eab09cb66025"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a7b17d1df2dc64b8e3d56eab09cb66025">ensureCharsCapacity</a> (int32_t capacity, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr class="memdesc:a7b17d1df2dc64b8e3d56eab09cb66025"><td class="mdescLeft">&#160;</td><td class="mdescRight">Ensures that chars is at least as large as the requested capacity.  <a href="classicu_1_1StringEnumeration.html#a7b17d1df2dc64b8e3d56eab09cb66025">More...</a><br /></td></tr>
<tr class="separator:a7b17d1df2dc64b8e3d56eab09cb66025"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0073630a1e1dd0b2f25ff86eaa57d235"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classicu_1_1UnicodeString.html">UnicodeString</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a0073630a1e1dd0b2f25ff86eaa57d235">setChars</a> (const char *s, int32_t length, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr class="memdesc:a0073630a1e1dd0b2f25ff86eaa57d235"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts s to Unicode and sets unistr to the result.  <a href="classicu_1_1StringEnumeration.html#a0073630a1e1dd0b2f25ff86eaa57d235">More...</a><br /></td></tr>
<tr class="separator:a0073630a1e1dd0b2f25ff86eaa57d235"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr class="memitem:a85fd413ec305467e295e61c7dddc1d8b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classicu_1_1UnicodeString.html">UnicodeString</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a85fd413ec305467e295e61c7dddc1d8b">unistr</a></td></tr>
<tr class="memdesc:a85fd413ec305467e295e61c7dddc1d8b"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="classicu_1_1UnicodeString.html" title="UnicodeString is a string class that stores Unicode characters directly and provides similar function...">UnicodeString</a> field for use with default implementations and subclasses.  <a href="classicu_1_1StringEnumeration.html#a85fd413ec305467e295e61c7dddc1d8b">More...</a><br /></td></tr>
<tr class="separator:a85fd413ec305467e295e61c7dddc1d8b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8376840fdc1115fe5cb702f053ea2e83"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a8376840fdc1115fe5cb702f053ea2e83">charsBuffer</a> [32]</td></tr>
<tr class="memdesc:a8376840fdc1115fe5cb702f053ea2e83"><td class="mdescLeft">&#160;</td><td class="mdescRight">char * default buffer for use with default implementations and subclasses.  <a href="classicu_1_1StringEnumeration.html#a8376840fdc1115fe5cb702f053ea2e83">More...</a><br /></td></tr>
<tr class="separator:a8376840fdc1115fe5cb702f053ea2e83"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5a35d9a6d36d0be9229ebba50348ad89"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a5a35d9a6d36d0be9229ebba50348ad89">chars</a></td></tr>
<tr class="memdesc:a5a35d9a6d36d0be9229ebba50348ad89"><td class="mdescLeft">&#160;</td><td class="mdescRight">char * buffer for use with default implementations and subclasses.  <a href="classicu_1_1StringEnumeration.html#a5a35d9a6d36d0be9229ebba50348ad89">More...</a><br /></td></tr>
<tr class="separator:a5a35d9a6d36d0be9229ebba50348ad89"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a51a09085b3b6970f300a7c2ded569f4a"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1StringEnumeration.html#a51a09085b3b6970f300a7c2ded569f4a">charsCapacity</a></td></tr>
<tr class="memdesc:a51a09085b3b6970f300a7c2ded569f4a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Capacity of chars, for use with default implementations and subclasses.  <a href="classicu_1_1StringEnumeration.html#a51a09085b3b6970f300a7c2ded569f4a">More...</a><br /></td></tr>
<tr class="separator:a51a09085b3b6970f300a7c2ded569f4a"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Base class for 'pure' C++ implementations of uenum api. </p>
<p>Adds a method that returns the next <a class="el" href="classicu_1_1UnicodeString.html" title="UnicodeString is a string class that stores Unicode characters directly and provides similar function...">UnicodeString</a> since in C++ this can be a common storage format for strings.</p>
<p>The model is that the enumeration is over strings maintained by a 'service.' At any point, the service might change, invalidating the enumerator (though this is expected to be rare). The iterator returns an error if this has occurred. Lack of the error is no guarantee that the service didn't change immediately after the call, so the returned string still might not be 'valid' on subsequent use.</p>
<p>Strings may take the form of const char*, const char16_t*, or const UnicodeString*. The type you get is determine by the variant of 'next' that you call. In general the <a class="el" href="classicu_1_1StringEnumeration.html" title="Base class for &#39;pure&#39; C++ implementations of uenum api.">StringEnumeration</a> is optimized for one of these types, but all StringEnumerations can return all types. Returned strings are each terminated with a NUL. Depending on the service data, they might also include embedded NUL characters, so API is provided to optionally return the true length, counting the embedded NULs but not counting the terminating NUL.</p>
<p>The pointers returned by next, unext, and snext become invalid upon any subsequent call to the enumeration's destructor, next, unext, snext, or reset.</p>
<p>ICU 2.8 adds some default implementations and helper functions for subclasses.</p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000763">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="strenum_8h_source.html#l00061">61</a> of file <a class="el" href="strenum_8h_source.html">strenum.h</a>.</p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="ac126117d6731f8fffe638d0bd2792cb9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac126117d6731f8fffe638d0bd2792cb9">&#9670;&nbsp;</a></span>~StringEnumeration()</h2>

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          <td class="memname">virtual icu::StringEnumeration::~StringEnumeration </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">virtual</span></span>  </td>
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<p>Destructor. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000764">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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</div>
<a id="a61478f73b5cf95e969999df44db5a9ab"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a61478f73b5cf95e969999df44db5a9ab">&#9670;&nbsp;</a></span>StringEnumeration()</h2>

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          <td class="memname">icu::StringEnumeration::StringEnumeration </td>
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<p>Default constructor for use with default implementations and subclasses. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000777">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aa7eaf0f49b8ea74a41afdc6d2075f769">&#9670;&nbsp;</a></span>clone()</h2>

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          <td class="memname">virtual <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a>* icu::StringEnumeration::clone </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<p>Clone this object, an instance of a subclass of <a class="el" href="classicu_1_1StringEnumeration.html" title="Base class for &#39;pure&#39; C++ implementations of uenum api.">StringEnumeration</a>. </p>
<p>Clones can be used concurrently in multiple threads. If a subclass does not implement <a class="el" href="classicu_1_1StringEnumeration.html#aa7eaf0f49b8ea74a41afdc6d2075f769" title="Clone this object, an instance of a subclass of StringEnumeration.">clone()</a>, or if an error occurs, then nullptr is returned. The caller must delete the clone.</p>
<dl class="section return"><dt>Returns</dt><dd>a clone of this object</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classicu_1_1UObject.html#aca1169c4978c52ce2b76eda104e9a214" title="ICU4C &quot;poor man&#39;s RTTI&quot;, returns a UClassID for the actual ICU class.">getDynamicClassID</a> </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000765">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a86d5dca1417957f07e59491d91bb4c51">&#9670;&nbsp;</a></span>count()</h2>

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          <td class="memname">virtual int32_t icu::StringEnumeration::count </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em></td><td>)</td>
          <td> const</td>
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<p>Return the number of elements that the iterator traverses. If the iterator is out of sync with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR, and the return value is zero.</p>
<p>The return value will not change except possibly as a result of a subsequent call to reset, or if the iterator becomes out of sync.</p>
<p>This is a convenience function. It can end up being very expensive as all the items might have to be pre-fetched (depending on the storage format of the data being traversed).</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">status</td><td>the error code. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>number of elements in the iterator.</dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000766">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a7b17d1df2dc64b8e3d56eab09cb66025">&#9670;&nbsp;</a></span>ensureCharsCapacity()</h2>

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          <td class="memname">void icu::StringEnumeration::ensureCharsCapacity </td>
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          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
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          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
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<p>Ensures that chars is at least as large as the requested capacity. </p>
<p>For use with default implementations and subclasses.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">capacity</td><td>Requested capacity. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code. </td></tr>
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<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000778">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ab30fc98cec84c5540e9ffbabea8e4891">&#9670;&nbsp;</a></span>next()</h2>

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          <td>(</td>
          <td class="paramtype">int32_t *&#160;</td>
          <td class="paramname"><em>resultLength</em>, </td>
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          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
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<p>Returns the next element as a NUL-terminated char*. If there are no more elements, returns nullptr. If the resultLength pointer is not nullptr, the length of the string (not counting the terminating NUL) is returned at that address. If an error status is returned, the value at resultLength is undefined.</p>
<p>The returned pointer is owned by this iterator and must not be deleted by the caller. The pointer is valid until the next call to next, unext, snext, reset, or the enumerator's destructor.</p>
<p>If the iterator is out of sync with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR and nullptr is returned.</p>
<p>If the native service string is a char16_t* string, it is converted to char* with the invariant converter. If the conversion fails (because a character cannot be converted) then status is set to U_INVARIANT_CONVERSION_ERROR and the return value is undefined (though not nullptr).</p>
<p>Starting with ICU 2.8, the default implementation calls <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> and handles the conversion. Either <a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next()</a> or <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> must be implemented differently by a subclass.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">status</td><td>the error code. </td></tr>
    <tr><td class="paramname">resultLength</td><td>a pointer to receive the length, can be nullptr. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the string, or nullptr.</dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000767">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#af0bf83132875470266b4aec0b3f8215c">&#9670;&nbsp;</a></span>operator!=()</h2>

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          <td class="paramtype">const <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a> &amp;&#160;</td>
          <td class="paramname"><em>that</em></td><td>)</td>
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<p>Compares this enumeration to other to check if both are not equal. </p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">that</td><td>The other string enumeration to compare this object to </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>true if the enumerations are equal. false if not. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000772">Stable:</a></b></dt><dd>ICU 3.6 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ae3d0e35c88da704b9b78bb64c7ced09a">&#9670;&nbsp;</a></span>operator==()</h2>

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          <td class="paramtype">const <a class="el" href="classicu_1_1StringEnumeration.html">StringEnumeration</a> &amp;&#160;</td>
          <td class="paramname"><em>that</em></td><td>)</td>
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<p>Compares this enumeration to other to check if both are equal. </p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">that</td><td>The other string enumeration to compare this object to </td></tr>
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  </dd>
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<dl class="section return"><dt>Returns</dt><dd>true if the enumerations are equal. false if not. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000771">Stable:</a></b></dt><dd>ICU 3.6 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ae156678fc4e31fb34415e1e2d296c94d">&#9670;&nbsp;</a></span>reset()</h2>

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          <td class="memname">virtual void icu::StringEnumeration::reset </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em></td><td>)</td>
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<p>Resets the iterator. This re-establishes sync with the service and rewinds the iterator to start at the first element.</p>
<p>Previous pointers returned by next, unext, or snext become invalid, and the value returned by count might change.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">status</td><td>the error code.</td></tr>
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  </dd>
</dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000770">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a0073630a1e1dd0b2f25ff86eaa57d235">&#9670;&nbsp;</a></span>setChars()</h2>

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          <td class="memname"><a class="el" href="classicu_1_1UnicodeString.html">UnicodeString</a>* icu::StringEnumeration::setChars </td>
          <td>(</td>
          <td class="paramtype">const char *&#160;</td>
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          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
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<p>Converts s to Unicode and sets unistr to the result. </p>
<p>For use with default implementations and subclasses, especially for implementations of <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> in terms of <a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next()</a>. This is provided with a helper function instead of a default implementation of <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> to avoid potential infinite loops between <a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next()</a> and <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a>.</p>
<p>For example: </p><div class="fragment"><div class="line"><span class="keyword">const</span> UnicodeString* <a class="code" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext</a>(<a class="code" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a>&amp; status) {</div>
<div class="line">  int32_t resultLength=0;</div>
<div class="line">  <span class="keyword">const</span> <span class="keywordtype">char</span> *s=<a class="code" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next</a>(&amp;resultLength, status);</div>
<div class="line">  <span class="keywordflow">return</span> <a class="code" href="classicu_1_1StringEnumeration.html#a0073630a1e1dd0b2f25ff86eaa57d235">setChars</a>(s, resultLength, status);</div>
<div class="line">}</div>
<div class="ttc" id="aclassicu_1_1StringEnumeration_html_a0073630a1e1dd0b2f25ff86eaa57d235"><div class="ttname"><a href="classicu_1_1StringEnumeration.html#a0073630a1e1dd0b2f25ff86eaa57d235">icu::StringEnumeration::setChars</a></div><div class="ttdeci">UnicodeString * setChars(const char *s, int32_t length, UErrorCode &amp;status)</div><div class="ttdoc">Converts s to Unicode and sets unistr to the result.</div></div>
<div class="ttc" id="aclassicu_1_1StringEnumeration_html_ab30fc98cec84c5540e9ffbabea8e4891"><div class="ttname"><a href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">icu::StringEnumeration::next</a></div><div class="ttdeci">virtual const char * next(int32_t *resultLength, UErrorCode &amp;status)</div></div>
<div class="ttc" id="aclassicu_1_1StringEnumeration_html_ad9a53215e559b8c4001d472da702bf5c"><div class="ttname"><a href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">icu::StringEnumeration::snext</a></div><div class="ttdeci">virtual const UnicodeString * snext(UErrorCode &amp;status)</div></div>
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</div><!-- fragment --><dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">s</td><td>String to be converted to Unicode. </td></tr>
    <tr><td class="paramname">length</td><td>Length of the string. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>A pointer to unistr. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000779">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ad9a53215e559b8c4001d472da702bf5c">&#9670;&nbsp;</a></span>snext()</h2>

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          <td>(</td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
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<p>Returns the next element a UnicodeString*. If there are no more elements, returns nullptr.</p>
<p>The returned pointer is owned by this iterator and must not be deleted by the caller. The pointer is valid until the next call to next, unext, snext, reset, or the enumerator's destructor.</p>
<p>If the iterator is out of sync with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR and nullptr is returned.</p>
<p>Starting with ICU 2.8, the default implementation calls <a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next()</a> and handles the conversion. Either <a class="el" href="classicu_1_1StringEnumeration.html#ab30fc98cec84c5540e9ffbabea8e4891">next()</a> or <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> must be implemented differently by a subclass.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">status</td><td>the error code. </td></tr>
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  </dd>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the string, or nullptr.</dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000769">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a722b4fbd8a0278c52953f3d38583ac84">&#9670;&nbsp;</a></span>unext()</h2>

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          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
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<p>Returns the next element as a NUL-terminated char16_t*. If there are no more elements, returns nullptr. If the resultLength pointer is not nullptr, the length of the string (not counting the terminating NUL) is returned at that address. If an error status is returned, the value at resultLength is undefined.</p>
<p>The returned pointer is owned by this iterator and must not be deleted by the caller. The pointer is valid until the next call to next, unext, snext, reset, or the enumerator's destructor.</p>
<p>If the iterator is out of sync with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR and nullptr is returned.</p>
<p>Starting with ICU 2.8, the default implementation calls <a class="el" href="classicu_1_1StringEnumeration.html#ad9a53215e559b8c4001d472da702bf5c">snext()</a> and handles the conversion.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">status</td><td>the error code. </td></tr>
    <tr><td class="paramname">resultLength</td><td>a pointer to receive the length, can be nullptr. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the string, or nullptr.</dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000768">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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<h2 class="groupheader">Field Documentation</h2>
<a id="a5a35d9a6d36d0be9229ebba50348ad89"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5a35d9a6d36d0be9229ebba50348ad89">&#9670;&nbsp;</a></span>chars</h2>

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<p>char * buffer for use with default implementations and subclasses. </p>
<p>Allocated in constructor and in <a class="el" href="classicu_1_1StringEnumeration.html#a7b17d1df2dc64b8e3d56eab09cb66025" title="Ensures that chars is at least as large as the requested capacity.">ensureCharsCapacity()</a>. </p><dl class="stable"><dt><b><a class="el" href="stable.html#_stable000775">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="strenum_8h_source.html#l00228">228</a> of file <a class="el" href="strenum_8h_source.html">strenum.h</a>.</p>

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<a id="a8376840fdc1115fe5cb702f053ea2e83"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8376840fdc1115fe5cb702f053ea2e83">&#9670;&nbsp;</a></span>charsBuffer</h2>

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<p>char * default buffer for use with default implementations and subclasses. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000774">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="strenum_8h_source.html#l00222">222</a> of file <a class="el" href="strenum_8h_source.html">strenum.h</a>.</p>

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<a id="a51a09085b3b6970f300a7c2ded569f4a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a51a09085b3b6970f300a7c2ded569f4a">&#9670;&nbsp;</a></span>charsCapacity</h2>

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<p>Capacity of chars, for use with default implementations and subclasses. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000776">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="strenum_8h_source.html#l00233">233</a> of file <a class="el" href="strenum_8h_source.html">strenum.h</a>.</p>

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<a id="a85fd413ec305467e295e61c7dddc1d8b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a85fd413ec305467e295e61c7dddc1d8b">&#9670;&nbsp;</a></span>unistr</h2>

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<p><a class="el" href="classicu_1_1UnicodeString.html" title="UnicodeString is a string class that stores Unicode characters directly and provides similar function...">UnicodeString</a> field for use with default implementations and subclasses. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000773">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="strenum_8h_source.html#l00217">217</a> of file <a class="el" href="strenum_8h_source.html">strenum.h</a>.</p>

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</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>common/unicode/<a class="el" href="strenum_8h_source.html">strenum.h</a></li>
</ul>
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