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apache / qpid-site / 04beb6e78eda47fdfc2fcfc1d2eeb9a270f89a87 / . / content / releases / qpid-proton-0.32.0 / proton / cpp / api / classproton_1_1codec_1_1decoder.html
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&#160;<span id="projectnumber">0.32.0</span>
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="title">decoder</div> </div>
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<p><b>Unsettled API</b> - A stream-like decoder from AMQP bytes to C++ values.
<a href="classproton_1_1codec_1_1decoder.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="decoder_8hpp_source.html">decoder.hpp</a>&gt;</code></p>
<p>Inherits data.</p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ac9222fed91a5066887b42f471de0be8a"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#ac9222fed91a5066887b42f471de0be8a">decoder</a> (const data &amp;d, bool exact=false)</td></tr>
<tr class="memdesc:ac9222fed91a5066887b42f471de0be8a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Wrap a Proton C data object. <a href="classproton_1_1codec_1_1decoder.html#ac9222fed91a5066887b42f471de0be8a">More...</a><br /></td></tr>
<tr class="separator:ac9222fed91a5066887b42f471de0be8a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adaca283b3eeb8861b7f7e8e94f784810"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#adaca283b3eeb8861b7f7e8e94f784810">decoder</a> (const internal::value_base &amp;, bool exact=false)</td></tr>
<tr class="memdesc:adaca283b3eeb8861b7f7e8e94f784810"><td class="mdescLeft">&#160;</td><td class="mdescRight">Attach decoder to a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a>. <a href="classproton_1_1codec_1_1decoder.html#adaca283b3eeb8861b7f7e8e94f784810">More...</a><br /></td></tr>
<tr class="separator:adaca283b3eeb8861b7f7e8e94f784810"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2db9ebfc344a8b1718099047639e32b2"><td class="memItemLeft" align="right" valign="top"><a id="a2db9ebfc344a8b1718099047639e32b2"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#a2db9ebfc344a8b1718099047639e32b2">decode</a> (const char *buffer, size_t size)</td></tr>
<tr class="memdesc:a2db9ebfc344a8b1718099047639e32b2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode AMQP data from a buffer and add it to the end of the decoders stream. <br /></td></tr>
<tr class="separator:a2db9ebfc344a8b1718099047639e32b2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8a2c9746655f00930f1d609b2bb9ff17"><td class="memItemLeft" align="right" valign="top"><a id="a8a2c9746655f00930f1d609b2bb9ff17"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#a8a2c9746655f00930f1d609b2bb9ff17">decode</a> (const std::string &amp;)</td></tr>
<tr class="memdesc:a8a2c9746655f00930f1d609b2bb9ff17"><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode AMQP data from a std::string and add it to the end of the decoders stream. <br /></td></tr>
<tr class="separator:a8a2c9746655f00930f1d609b2bb9ff17"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aba1201662b7dccd64b782cb43e40d3e0"><td class="memItemLeft" align="right" valign="top"><a id="aba1201662b7dccd64b782cb43e40d3e0"></a>
bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#aba1201662b7dccd64b782cb43e40d3e0">more</a> ()</td></tr>
<tr class="memdesc:aba1201662b7dccd64b782cb43e40d3e0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return true if there are more value to extract at the current level. <br /></td></tr>
<tr class="separator:aba1201662b7dccd64b782cb43e40d3e0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af3a00236ce433d05e26c0eb2ed5dfcd0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="namespaceproton.html#a83c2656d467d69eb49725c18f5aa13a9">type_id</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#af3a00236ce433d05e26c0eb2ed5dfcd0">next_type</a> ()</td></tr>
<tr class="memdesc:af3a00236ce433d05e26c0eb2ed5dfcd0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the type of the next value that will be read by operator&gt;&gt;. <a href="classproton_1_1codec_1_1decoder.html#af3a00236ce433d05e26c0eb2ed5dfcd0">More...</a><br /></td></tr>
<tr class="separator:af3a00236ce433d05e26c0eb2ed5dfcd0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a010d92fa617e5921f73b80bac0bc5690"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#a010d92fa617e5921f73b80bac0bc5690">operator&gt;&gt;</a> (<a class="el" href="namespaceproton_1_1codec.html#structproton_1_1codec_1_1start">start</a> &amp;)</td></tr>
<tr class="memdesc:a010d92fa617e5921f73b80bac0bc5690"><td class="mdescLeft">&#160;</td><td class="mdescRight">Start decoding a container type, such as an ARRAY, LIST or MAP. <a href="classproton_1_1codec_1_1decoder.html#a010d92fa617e5921f73b80bac0bc5690">More...</a><br /></td></tr>
<tr class="separator:a010d92fa617e5921f73b80bac0bc5690"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a29037b1d70f61e041b2d5be7c67b577d"><td class="memItemLeft" align="right" valign="top"><a id="a29037b1d70f61e041b2d5be7c67b577d"></a>
<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#a29037b1d70f61e041b2d5be7c67b577d">operator&gt;&gt;</a> (const <a class="el" href="namespaceproton_1_1codec.html#structproton_1_1codec_1_1finish">finish</a> &amp;)</td></tr>
<tr class="memdesc:a29037b1d70f61e041b2d5be7c67b577d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Finish decoding a container type, and move on to the next value in the stream. <br /></td></tr>
<tr class="separator:a29037b1d70f61e041b2d5be7c67b577d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac6c6ddca9af56625b28bc7989b02f24b"><td class="memTemplParams" colspan="2">template&lt;class T &gt; </td></tr>
<tr class="memitem:ac6c6ddca9af56625b28bc7989b02f24b"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#ac6c6ddca9af56625b28bc7989b02f24b">operator&gt;&gt;</a> (sequence_ref&lt; T &gt; r)</td></tr>
<tr class="memdesc:ac6c6ddca9af56625b28bc7989b02f24b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Extract any AMQP sequence (ARRAY, LIST or MAP) to a C++ sequence container of T if the elements types are convertible to T. <a href="classproton_1_1codec_1_1decoder.html#ac6c6ddca9af56625b28bc7989b02f24b">More...</a><br /></td></tr>
<tr class="separator:ac6c6ddca9af56625b28bc7989b02f24b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a92c526a77d6aa412e17051a2cfeb7210"><td class="memTemplParams" colspan="2"><a id="a92c526a77d6aa412e17051a2cfeb7210"></a>
template&lt;class T &gt; </td></tr>
<tr class="memitem:a92c526a77d6aa412e17051a2cfeb7210"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#a92c526a77d6aa412e17051a2cfeb7210">operator&gt;&gt;</a> (associative_ref&lt; T &gt; r)</td></tr>
<tr class="memdesc:a92c526a77d6aa412e17051a2cfeb7210"><td class="mdescLeft">&#160;</td><td class="mdescRight">Extract an AMQP MAP to a C++ associative container. <br /></td></tr>
<tr class="separator:a92c526a77d6aa412e17051a2cfeb7210"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad96e5571bbd7384096ca07a8a9368ffc"><td class="memTemplParams" colspan="2"><a id="ad96e5571bbd7384096ca07a8a9368ffc"></a>
template&lt;class T &gt; </td></tr>
<tr class="memitem:ad96e5571bbd7384096ca07a8a9368ffc"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classproton_1_1codec_1_1decoder.html#ad96e5571bbd7384096ca07a8a9368ffc">operator&gt;&gt;</a> (pair_sequence_ref&lt; T &gt; r)</td></tr>
<tr class="memdesc:ad96e5571bbd7384096ca07a8a9368ffc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Extract an AMQP MAP to a C++ push_back sequence of pairs preserving encoded order. <br /></td></tr>
<tr class="separator:ad96e5571bbd7384096ca07a8a9368ffc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr><td colspan="2"><div class="groupHeader">Extract built-in types</div></td></tr>
<tr><td colspan="2"><div class="groupText"><dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname"><a class="el" href="structproton_1_1conversion__error.html" title="An error converting between AMQP and C++ data.">conversion_error</a></td><td>if the decoder is empty or has an incompatible type. </td></tr>
</table>
</dd>
</dl>
</div></td></tr>
<tr class="memitem:adc575dd1b25a7601cc71fe8e80457f43"><td class="memItemLeft" align="right" valign="top"><a id="adc575dd1b25a7601cc71fe8e80457f43"></a>
<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (bool &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (uint8_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (int8_t &amp;)</td></tr>
<tr class="separator:a5f054af2a511d424ca34335dad93737f"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (uint16_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (int16_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (uint32_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (int32_t &amp;)</td></tr>
<tr class="separator:ae5c5e5e03acd6735fb1781a5f5672b30"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (wchar_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (uint64_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (int64_t &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (<a class="el" href="classproton_1_1timestamp.html">timestamp</a> &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (float &amp;)</td></tr>
<tr class="separator:aa6fc102e31e40a8acb1ec9d7c4705021"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6b4867d35efeee5a7d49877d077495f5"><td class="memItemLeft" align="right" valign="top"><a id="a6b4867d35efeee5a7d49877d077495f5"></a>
<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (double &amp;)</td></tr>
<tr class="separator:a6b4867d35efeee5a7d49877d077495f5"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (<a class="el" href="classproton_1_1decimal32.html">decimal32</a> &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (internal::value_base &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (<a class="el" href="classproton_1_1null.html">null</a> &amp;)</td></tr>
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<a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator&gt;&gt;</b> (decltype(nullptr)&amp;)</td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a>
Friends</h2></td></tr>
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class&#160;</td><td class="memItemRight" valign="bottom"><b>message</b></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><b>Unsettled API</b> - A stream-like decoder from AMQP bytes to C++ values. </p>
<p>For internal use only.</p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="types_page.html">AMQP and C++ types</a> for the recommended ways to manage AMQP data </dd></dl>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="ac9222fed91a5066887b42f471de0be8a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac9222fed91a5066887b42f471de0be8a">&#9670;&nbsp;</a></span>decoder() <span class="overload">[1/2]</span></h2>
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<td class="paramtype">const data &amp;&#160;</td>
<td class="paramname"><em>d</em>, </td>
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<p>Wrap a Proton C data object. </p>
<p>The exact flag if set means decode only when there is an exact match between the AMQP and C++ type. If not set then perform automatic conversions. </p>
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</div>
<a id="adaca283b3eeb8861b7f7e8e94f784810"></a>
<h2 class="memtitle"><span class="permalink"><a href="#adaca283b3eeb8861b7f7e8e94f784810">&#9670;&nbsp;</a></span>decoder() <span class="overload">[2/2]</span></h2>
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<td class="memname"><a class="el" href="classproton_1_1codec_1_1decoder.html">decoder</a> </td>
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<td class="paramtype">const internal::value_base &amp;&#160;</td>
<td class="paramname">, </td>
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<p>Attach decoder to a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a>. </p>
<p>The decoder is rewound to the start of the data. </p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#af3a00236ce433d05e26c0eb2ed5dfcd0">&#9670;&nbsp;</a></span>next_type()</h2>
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<td class="memname"><a class="el" href="namespaceproton.html#a83c2656d467d69eb49725c18f5aa13a9">type_id</a> next_type </td>
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<p>Get the type of the next value that will be read by operator&gt;&gt;. </p>
<dl class="exception"><dt>Exceptions</dt><dd>
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<tr><td class="paramname"><a class="el" href="structproton_1_1conversion__error.html" title="An error converting between AMQP and C++ data.">conversion_error</a></td><td>if no more values. </td></tr>
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<dl class="section see"><dt>See also</dt><dd><a class="el" href="classproton_1_1codec_1_1decoder.html#aba1201662b7dccd64b782cb43e40d3e0" title="Return true if there are more value to extract at the current level.">decoder::more()</a>. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a010d92fa617e5921f73b80bac0bc5690">&#9670;&nbsp;</a></span>operator&gt;&gt;() <span class="overload">[1/2]</span></h2>
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<p>Start decoding a container type, such as an ARRAY, LIST or MAP. </p>
<p>This "enters" the container, <a class="el" href="classproton_1_1codec_1_1decoder.html#aba1201662b7dccd64b782cb43e40d3e0" title="Return true if there are more value to extract at the current level.">more()</a> will return false at the end of the container. Call finish() to "exit" the container and move on to the next value. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ac6c6ddca9af56625b28bc7989b02f24b">&#9670;&nbsp;</a></span>operator&gt;&gt;() <span class="overload">[2/2]</span></h2>
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<p>Extract any AMQP sequence (ARRAY, LIST or MAP) to a C++ sequence container of T if the elements types are convertible to T. </p>
<p>A MAP is extracted as <code>[key1, value1, key2, value2...]</code>. </p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>proton/codec/<a class="el" href="decoder_8hpp_source.html">decoder.hpp</a></li>
</ul>
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