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<h1>CanonicalIterator Class Reference</h1><!-- doxytag: class="CanonicalIterator" --><!-- doxytag: inherits="UObject" -->
<p>This class allows one to iterate through all the strings that are canonically equivalent to a given string.  
<a href="#_details">More...</a></p>

<p><code>#include &lt;<a class="el" href="caniter_8h_source.html">caniter.h</a>&gt;</code></p>
<div class="dynheader">
Inheritance diagram for CanonicalIterator:</div>
<div class="dynsection">
 <div class="center">
  <img src="classCanonicalIterator.gif" usemap="#CanonicalIterator_map" alt=""/>
  <map id="CanonicalIterator_map" name="CanonicalIterator_map">
<area href="classUObject.html" alt="UObject" shape="rect" coords="0,56,109,80"/>
<area href="classUMemory.html" alt="UMemory" shape="rect" coords="0,0,109,24"/>
</map>
 </div>
</div>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#a581c81477525fb72415b732ee787245c">CanonicalIterator</a> (const <a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;source, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Construct a <a class="el" href="classCanonicalIterator.html" title="This class allows one to iterate through all the strings that are canonically equivalent...">CanonicalIterator</a> object.  <a href="#a581c81477525fb72415b732ee787245c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#abe0bf9f1eff2eb424a2882da89925fbb">~CanonicalIterator</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Destructor Cleans pieces.  <a href="#abe0bf9f1eff2eb424a2882da89925fbb"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classUnicodeString.html">UnicodeString</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#aa9fa2c21b52c2e2cac9e8f76aefde683">getSource</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Gets the NFD form of the current source we are iterating over.  <a href="#aa9fa2c21b52c2e2cac9e8f76aefde683"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#a561310848158d309f57f9068cecfcaef">reset</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Resets the iterator so that one can start again from the beginning.  <a href="#a561310848158d309f57f9068cecfcaef"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classUnicodeString.html">UnicodeString</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#a085fdd3e06f8a9895f3295ddf202ee92">next</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Get the next canonically equivalent string.  <a href="#a085fdd3e06f8a9895f3295ddf202ee92"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#a68c9a2ca974735c9399b7c0b831097b9">setSource</a> (const <a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;newSource, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set a new source for this iterator.  <a href="#a68c9a2ca974735c9399b7c0b831097b9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="utypes_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#a63a54fdebc38f92648e588ec4aeec9cf">getDynamicClassID</a> () const </td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">ICU "poor man's RTTI", returns a UClassID for the actual class.  <a href="#a63a54fdebc38f92648e588ec4aeec9cf"></a><br/></td></tr>
<tr><td colspan="2"><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#abdcec3eed4a26de48c0e9c27f6d2223c">permute</a> (<a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;source, <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> skipZeros, Hashtable *result, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;status)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Dumb recursive implementation of permutation.  <a href="#abdcec3eed4a26de48c0e9c27f6d2223c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="utypes_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classCanonicalIterator.html#ab9ff3b473ca8fc28b9c104633efec51f">getStaticClassID</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">ICU "poor man's RTTI", returns a UClassID for this class.  <a href="#ab9ff3b473ca8fc28b9c104633efec51f"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>This class allows one to iterate through all the strings that are canonically equivalent to a given string. </p>
<p>For example, here are some sample results: Results for: {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 1: \u0041\u030A\u0064\u0307\u0327 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 2: \u0041\u030A\u0064\u0327\u0307 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 3: \u0041\u030A\u1E0B\u0327 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 4: \u0041\u030A\u1E11\u0307 = {LATIN CAPITAL LETTER A}{COMBINING RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} 5: \u00C5\u0064\u0307\u0327 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 6: \u00C5\u0064\u0327\u0307 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 7: \u00C5\u1E0B\u0327 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 8: \u00C5\u1E11\u0307 = {LATIN CAPITAL LETTER A WITH RING ABOVE}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} 9: \u212B\u0064\u0307\u0327 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING DOT ABOVE}{COMBINING CEDILLA} 10: \u212B\u0064\u0327\u0307 = {ANGSTROM SIGN}{LATIN SMALL LETTER D}{COMBINING CEDILLA}{COMBINING DOT ABOVE} 11: \u212B\u1E0B\u0327 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH DOT ABOVE}{COMBINING CEDILLA} 12: \u212B\u1E11\u0307 = {ANGSTROM SIGN}{LATIN SMALL LETTER D WITH CEDILLA}{COMBINING DOT ABOVE} <br/>
Note: the code is intended for use with small strings, and is not suitable for larger ones, since it has not been optimized for that situation. Note, <a class="el" href="classCanonicalIterator.html" title="This class allows one to iterate through all the strings that are canonically equivalent...">CanonicalIterator</a> is not intended to be subclassed. </p>
<dl class="author"><dt><b>Author:</b></dt><dd>M. Davis </dd>
<dd>
C++ port by V. Weinstein </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000051">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p>Definition at line <a class="el" href="caniter_8h_source.html#l00071">71</a> of file <a class="el" href="caniter_8h_source.html">caniter.h</a>.</p>
<hr/><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" id="a581c81477525fb72415b732ee787245c"></a><!-- doxytag: member="CanonicalIterator::CanonicalIterator" ref="a581c81477525fb72415b732ee787245c" args="(const UnicodeString &amp;source, UErrorCode &amp;status)" -->
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          <td class="memname">CanonicalIterator::CanonicalIterator </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>source</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>status</em></td><td>&nbsp;</td>
        </tr>
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          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
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<p>Construct a <a class="el" href="classCanonicalIterator.html" title="This class allows one to iterate through all the strings that are canonically equivalent...">CanonicalIterator</a> object. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>source</em>&nbsp;</td><td>string to get results for </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>status</em>&nbsp;</td><td>Fill-in parameter which receives the status of this operation. </td></tr>
  </table>
  </dd>
</dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000052">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

</div>
</div>
<a class="anchor" id="abe0bf9f1eff2eb424a2882da89925fbb"></a><!-- doxytag: member="CanonicalIterator::~CanonicalIterator" ref="abe0bf9f1eff2eb424a2882da89925fbb" args="()" -->
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          <td class="memname">virtual CanonicalIterator::~CanonicalIterator </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [virtual]</code></td>
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<p>Destructor Cleans pieces. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000053">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

</div>
</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a63a54fdebc38f92648e588ec4aeec9cf"></a><!-- doxytag: member="CanonicalIterator::getDynamicClassID" ref="a63a54fdebc38f92648e588ec4aeec9cf" args="() const " -->
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          <td class="memname">virtual <a class="el" href="utypes_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> CanonicalIterator::getDynamicClassID </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
          <td> const<code> [virtual]</code></td>
        </tr>
      </table>
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<div class="memdoc">

<p>ICU "poor man's RTTI", returns a UClassID for the actual class. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000059">Stable:</a></b></dt><dd>ICU 2.2 </dd></dl>

<p>Implements <a class="el" href="classUObject.html#a9b1acc95efd89cb86ec31f2dc947a262">UObject</a>.</p>

</div>
</div>
<a class="anchor" id="aa9fa2c21b52c2e2cac9e8f76aefde683"></a><!-- doxytag: member="CanonicalIterator::getSource" ref="aa9fa2c21b52c2e2cac9e8f76aefde683" args="()" -->
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          <td class="memname"><a class="el" href="classUnicodeString.html">UnicodeString</a> CanonicalIterator::getSource </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
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<p>Gets the NFD form of the current source we are iterating over. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>gets the source: NOTE: it is the NFD form of source </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000054">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

</div>
</div>
<a class="anchor" id="ab9ff3b473ca8fc28b9c104633efec51f"></a><!-- doxytag: member="CanonicalIterator::getStaticClassID" ref="ab9ff3b473ca8fc28b9c104633efec51f" args="()" -->
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          <td class="memname">static <a class="el" href="utypes_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> CanonicalIterator::getStaticClassID </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [static]</code></td>
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<p>ICU "poor man's RTTI", returns a UClassID for this class. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000058">Stable:</a></b></dt><dd>ICU 2.2 </dd></dl>

</div>
</div>
<a class="anchor" id="a085fdd3e06f8a9895f3295ddf202ee92"></a><!-- doxytag: member="CanonicalIterator::next" ref="a085fdd3e06f8a9895f3295ddf202ee92" args="()" -->
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          <td class="memname"><a class="el" href="classUnicodeString.html">UnicodeString</a> CanonicalIterator::next </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
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<p>Get the next canonically equivalent string. </p>
<p><br/>
<b>Warning: The strings are not guaranteed to be in any particular order.</b> </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>the next string that is canonically equivalent. A bogus string is returned when the iteration is done. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000056">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

</div>
</div>
<a class="anchor" id="abdcec3eed4a26de48c0e9c27f6d2223c"></a><!-- doxytag: member="CanonicalIterator::permute" ref="abdcec3eed4a26de48c0e9c27f6d2223c" args="(UnicodeString &amp;source, UBool skipZeros, Hashtable *result, UErrorCode &amp;status)" -->
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          <td class="memname">static void CanonicalIterator::permute </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>source</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a>&nbsp;</td>
          <td class="paramname"> <em>skipZeros</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">Hashtable *&nbsp;</td>
          <td class="paramname"> <em>result</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>status</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td><code> [static]</code></td>
        </tr>
      </table>
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<p>Dumb recursive implementation of permutation. </p>
<p>TODO: optimize </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>source</em>&nbsp;</td><td>the string to find permutations for </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>skipZeros</em>&nbsp;</td><td>determine if skip zeros </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>result</em>&nbsp;</td><td>the results in a set. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>status</em>&nbsp;</td><td>Fill-in parameter which receives the status of this operation. </td></tr>
  </table>
  </dd>
</dl>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000013">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. </dd></dl>

</div>
</div>
<a class="anchor" id="a561310848158d309f57f9068cecfcaef"></a><!-- doxytag: member="CanonicalIterator::reset" ref="a561310848158d309f57f9068cecfcaef" args="()" -->
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          <td class="memname">void CanonicalIterator::reset </td>
          <td>(</td>
          <td class="paramname"></td>
          <td>&nbsp;)&nbsp;</td>
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<p>Resets the iterator so that one can start again from the beginning. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000055">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

</div>
</div>
<a class="anchor" id="a68c9a2ca974735c9399b7c0b831097b9"></a><!-- doxytag: member="CanonicalIterator::setSource" ref="a68c9a2ca974735c9399b7c0b831097b9" args="(const UnicodeString &amp;newSource, UErrorCode &amp;status)" -->
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          <td class="memname">void CanonicalIterator::setSource </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="classUnicodeString.html">UnicodeString</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>newSource</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>status</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
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<p>Set a new source for this iterator. </p>
<p>Allows object reuse. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>newSource</em>&nbsp;</td><td>the source string to iterate against. This allows the same iterator to be used while changing the source string, saving object creation. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>status</em>&nbsp;</td><td>Fill-in parameter which receives the status of this operation. </td></tr>
  </table>
  </dd>
</dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000057">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

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