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<div class="title">null.hpp</div> </div>
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<a href="null_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#ifndef PROTON_NULL_HPP</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="preprocessor">#define PROTON_NULL_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160; </div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment"> * under the License.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &quot;./internal/config.hpp&quot;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &quot;./internal/comparable.hpp&quot;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &quot;./internal/export.hpp&quot;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &lt;iosfwd&gt;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceproton.html">proton</a> {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; </div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classproton_1_1null.html"> 39</a></span>&#160;<span class="keyword">class </span><a class="code" href="classproton_1_1null.html">null</a> : <span class="keyword">private</span> internal::comparable&lt;null&gt; {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">null</span>() {}</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="preprocessor">#if PN_CPP_HAS_NULLPTR</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keyword">null</span>(decltype(<span class="keyword">nullptr</span>)) {}</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keyword">friend</span> <span class="keywordtype">bool</span> <a class="code" href="classproton_1_1null.html#a8d5cd15531564a98e22e9059402ac0db">operator==</a>(<span class="keyword">const</span> <span class="keyword">null</span>&amp;, <span class="keyword">const</span> <span class="keyword">null</span>&amp;) { <span class="keywordflow">return</span> <span class="keyword">true</span>; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classproton_1_1null.html#aa6f357eaabe64bd022b0976ab0f0df33"> 49</a></span>&#160; <span class="keyword">friend</span> <span class="keywordtype">bool</span> <a class="code" href="classproton_1_1null.html#aa6f357eaabe64bd022b0976ab0f0df33">operator&lt;</a>(<span class="keyword">const</span> <span class="keyword">null</span>&amp;, <span class="keyword">const</span> <span class="keyword">null</span>&amp;) { <span class="keywordflow">return</span> <span class="keyword">false</span>; }</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;};</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; </div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="namespaceproton.html#a300e2b7df1c2d28c7233ed6a387faae0"> 53</a></span>&#160;PN_CPP_EXTERN std::ostream&amp; <a class="code" href="namespaceproton.html#ae6fabe30961a3d3280bb8445e743b21c">operator&lt;&lt;</a>(std::ostream&amp;, <span class="keyword">const</span> <span class="keyword">null</span>&amp;);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;}</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="preprocessor">#endif // PROTON_NULL_HPP</span></div>
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<div class="ttc" id="anamespaceproton_html_ae6fabe30961a3d3280bb8445e743b21c"><div class="ttname"><a href="namespaceproton.html#ae6fabe30961a3d3280bb8445e743b21c">proton::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;, const binary &amp;)</div><div class="ttdoc">Print a binary value.</div></div>
<div class="ttc" id="aclassproton_1_1null_html"><div class="ttname"><a href="classproton_1_1null.html">proton::null</a></div><div class="ttdoc">The type of the AMQP null value.</div><div class="ttdef"><b>Definition:</b> null.hpp:39</div></div>
<div class="ttc" id="aclassproton_1_1null_html_aa6f357eaabe64bd022b0976ab0f0df33"><div class="ttname"><a href="classproton_1_1null.html#aa6f357eaabe64bd022b0976ab0f0df33">proton::null::operator&lt;</a></div><div class="ttdeci">friend bool operator&lt;(const null &amp;, const null &amp;)</div><div class="ttdoc">null instances are never unequal</div><div class="ttdef"><b>Definition:</b> null.hpp:49</div></div>
<div class="ttc" id="anamespaceproton_html"><div class="ttname"><a href="namespaceproton.html">proton</a></div><div class="ttdoc">The main Proton namespace.</div><div class="ttdef"><b>Definition:</b> annotation_key.hpp:33</div></div>
<div class="ttc" id="aclassproton_1_1null_html_a8d5cd15531564a98e22e9059402ac0db"><div class="ttname"><a href="classproton_1_1null.html#a8d5cd15531564a98e22e9059402ac0db">proton::null::operator==</a></div><div class="ttdeci">friend bool operator==(const null &amp;, const null &amp;)</div><div class="ttdoc">null instances are always equal</div><div class="ttdef"><b>Definition:</b> null.hpp:47</div></div>
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