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<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aacf6c869f6a9c66ac1bc99e93f310044.html#aacf6c869f6a9c66ac1bc99e93f310044">number_float_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a6944904b3b59769b1cf62ac2532cbe33.html#a6944904b3b59769b1cf62ac2532cbe33">number_integer_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ad1f617d29e8923dd40c89153f792b1bc.html#ad1f617d29e8923dd40c89153f792b1bc">object</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a63691315292df8e1522b00d37ebb1ffc.html#a63691315292df8e1522b00d37ebb1ffc">object_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a5d428360d75a52f6af74751d1cc912c6.html#a5d428360d75a52f6af74751d1cc912c6">operator value_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_af709c079de0ac3507143ea2c60699bd0.html#af709c079de0ac3507143ea2c60699bd0">operator ValueType</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a6e2e21da48f5d9471716cd868a068327.html#a6e2e21da48f5d9471716cd868a068327">operator!=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ae347859ec88176ef76a0cbe5b4514fcf.html#ae347859ec88176ef76a0cbe5b4514fcf">operator!=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a7f97a91ad8f1d5cf0b9213bd24f247c4.html#a7f97a91ad8f1d5cf0b9213bd24f247c4">operator!=</a></td></tr>
<tr><td class="navtab"><a class="qindexHL" href="classnlohmann_1_1basic__json_a3173944e7b1809a333def4078a0b92a3.html#a3173944e7b1809a333def4078a0b92a3">operator+=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a960962c683909619d1d2fbbe856c022e.html#a960962c683909619d1d2fbbe856c022e">operator+=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a0703ae5cbd2daac5e6c0ae01d3a1b114.html#a0703ae5cbd2daac5e6c0ae01d3a1b114">operator+=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aac185a137428a7337aa620de07bfbbd7.html#aac185a137428a7337aa620de07bfbbd7">operator&lt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aacd442b66140c764c594ac8ad7dfd5b3.html#aacd442b66140c764c594ac8ad7dfd5b3">operator&lt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a5e34c5435e557d0bf666bd7311211405.html#a5e34c5435e557d0bf666bd7311211405">operator&lt;&lt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a60ca396028b8d9714c6e10efbf475af6.html#a60ca396028b8d9714c6e10efbf475af6">operator&lt;&lt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a5c8bb5200f5eac10d31e26be46e5b1ac.html#a5c8bb5200f5eac10d31e26be46e5b1ac">operator&lt;=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_adf5dea6fa9d7075ff89ca0796ab47a7e.html#adf5dea6fa9d7075ff89ca0796ab47a7e">operator=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a122640e7e2db1814fc7bbb3c122ec76e.html#a122640e7e2db1814fc7bbb3c122ec76e">operator==</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a9730b9f7bc2150e641fe20198d4477c7.html#a9730b9f7bc2150e641fe20198d4477c7">operator==</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a98e05a2c9b8f74bd60442772cddeee52.html#a98e05a2c9b8f74bd60442772cddeee52">operator==</a></td></tr>
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<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a74a943800c7f103d0990d7eef82c6453.html#a74a943800c7f103d0990d7eef82c6453">operator&gt;=</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a34d6a60dd99e9f33b8273a1c8db5669b.html#a34d6a60dd99e9f33b8273a1c8db5669b">operator&gt;&gt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aaf363408931d76472ded14017e59c9e8.html#aaf363408931d76472ded14017e59c9e8">operator&gt;&gt;</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a57703688bee6b9736ab3a430d8d246f2.html#a57703688bee6b9736ab3a430d8d246f2">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ae960d2d6bc7b94fe39cc5e9f106edfa9.html#ae960d2d6bc7b94fe39cc5e9f106edfa9">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_af74581d177dafc38df5a126ccd358999.html#af74581d177dafc38df5a126ccd358999">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a8e34088252a3ee6b2377f3a1f26dd1ba.html#a8e34088252a3ee6b2377f3a1f26dd1ba">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_adc5605cf6f8ff0cc6c3bb04a5d7c2f2d.html#adc5605cf6f8ff0cc6c3bb04a5d7c2f2d">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aad7eff162b0b991ef233503c592c1e2a.html#aad7eff162b0b991ef233503c592c1e2a">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a0ff73601e88f8ace62ff0b453ebb9043.html#a0ff73601e88f8ace62ff0b453ebb9043">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ae7e36437700ef7353ad9961c8dd16a95.html#ae7e36437700ef7353ad9961c8dd16a95">operator[]</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_af2730bc8ffa6b28916875c13ee7b83f5.html#af2730bc8ffa6b28916875c13ee7b83f5">parse</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a74ccfa471a0c061876b247f820f3c741.html#a74ccfa471a0c061876b247f820f3c741">parse</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aa0422e861b4cbd7cdcaad7a11a1304a9.html#aa0422e861b4cbd7cdcaad7a11a1304a9">parse</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aea1c863b719b4ca5b77188c171bbfafe.html#aea1c863b719b4ca5b77188c171bbfafe">parse_event_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aabe4661644ea549089f0886c2551d2ac.html#aabe4661644ea549089f0886c2551d2ac">parser_callback_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a6bbd3e72a870f1ba81ff6886b063b0fe.html#a6bbd3e72a870f1ba81ff6886b063b0fe">pointer</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a66f936cfbd252f85bd3dc2598e37a64b.html#a66f936cfbd252f85bd3dc2598e37a64b">push_back</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a5114ed5eb394a2805da0bd1acba95ae2.html#a5114ed5eb394a2805da0bd1acba95ae2">push_back</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a2f07bcf7e75c34396476dd1790f26ce8.html#a2f07bcf7e75c34396476dd1790f26ce8">push_back</a></td></tr>
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<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a5fd8b54389698edf0c08e2dd001f610b.html#a5fd8b54389698edf0c08e2dd001f610b">reference</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a7c08f966200af98db0313a3b517ce0a9.html#a7c08f966200af98db0313a3b517ce0a9">rend</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a4ad3f27ecece8f644e8dca69a97eb67f.html#a4ad3f27ecece8f644e8dca69a97eb67f">rend</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a1683189bd539313b5559f07961166c8b.html#a1683189bd539313b5559f07961166c8b">reverse_iterator</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ab9a20bd1d391e9cb968db50c246f728d.html#ab9a20bd1d391e9cb968db50c246f728d">size</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a80ceaa3bdd346292273b309e08525c1c.html#a80ceaa3bdd346292273b309e08525c1c">size_type</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_ace8338e57fdb11e1955c2a0c2d782069.html#ace8338e57fdb11e1955c2a0c2d782069">string_t</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_af073eec08d2e68924098aef09e9a10ba.html#af073eec08d2e68924098aef09e9a10ba">swap</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_aa71e977d31f470689883ac60d16ea4ac.html#aa71e977d31f470689883ac60d16ea4ac">swap</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a4bf695ddf4a00ea8feea2c725ec847f1.html#a4bf695ddf4a00ea8feea2c725ec847f1">swap</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a57a96ab3ff1ce7b48a754129fb12c982.html#a57a96ab3ff1ce7b48a754129fb12c982">swap</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a42f9133f978dde4cce5851b2c2434a0c.html#a42f9133f978dde4cce5851b2c2434a0c">type</a></td></tr>
<tr><td class="navtab"><a class="qindex" href="classnlohmann_1_1basic__json_a26b7e4876af25eae5800ce43f93aaef2.html#a26b7e4876af25eae5800ce43f93aaef2">value</a></td></tr>
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template&lt;template&lt; typename U, typename V, typename...Args &gt; class ObjectType = std::map, template&lt; typename U, typename...Args &gt; class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = int64_t, class NumberFloatType = double, template&lt; typename U &gt; class AllocatorType = std::allocator&gt; </div>
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<td>(</td>
<td class="paramtype"><a class="el" href="classnlohmann_1_1basic__json.html">basic_json</a> &amp;&amp;&#160;</td>
<td class="paramname"><em>val</em></td><td>)</td>
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<p>add an object to an array Appends the given element <em>val</em> to the end of the JSON value. If the function is called on a JSON null value, an empty array is created before appending <em>val</em>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">val</td><td>the value to add to the JSON array</td></tr>
</table>
</dd>
</dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">std::domain_error</td><td>when called on a type other than JSON array or null; example: <code>"cannot use push_back() with number"</code></td></tr>
</table>
</dd>
</dl>
<dl class="section user"><dt>Complexity</dt><dd>Amortized constant.</dd></dl>
<dl class="section user"><dt>Example</dt><dd>The example shows how <code>push_back</code> and <code>+=</code> can be used to add elements to a JSON array. Note how the <code>null</code> value was silently converted to a JSON array. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#include &lt;json.hpp&gt;</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;</div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="keyword">using namespace </span><a class="code" href="namespacenlohmann.html">nlohmann</a>;</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="keywordtype">int</span> main()</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;{</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160; <span class="comment">// create JSON values</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; <a class="code" href="classnlohmann_1_1basic__json.html">json</a> array = {1, 2, 3, 4, 5};</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160; <a class="code" href="classnlohmann_1_1basic__json.html">json</a> null;</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160; <span class="comment">// print values</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; std::cout &lt;&lt; array &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>;</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; std::cout &lt;&lt; null &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>;</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; <span class="comment">// add values</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; array.<a class="code" href="classnlohmann_1_1basic__json_a66f936cfbd252f85bd3dc2598e37a64b.html#a66f936cfbd252f85bd3dc2598e37a64b">push_back</a>(6);</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; array += 7;</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; null += <span class="stringliteral">&quot;first&quot;</span>;</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; null += <span class="stringliteral">&quot;second&quot;</span>;</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; <span class="comment">// print values</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; std::cout &lt;&lt; array &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>;</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; std::cout &lt;&lt; null &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;}</div><div class="ttc" id="classnlohmann_1_1basic__json_html"><div class="ttname"><a href="classnlohmann_1_1basic__json.html">nlohmann::basic_json</a></div><div class="ttdoc">a class to store JSON values </div><div class="ttdef"><b>Definition:</b> <a href="json_8hpp_source.html#l00191">json.hpp:191</a></div></div>
<div class="ttc" id="classnlohmann_1_1basic__json_a66f936cfbd252f85bd3dc2598e37a64b_html_a66f936cfbd252f85bd3dc2598e37a64b"><div class="ttname"><a href="classnlohmann_1_1basic__json_a66f936cfbd252f85bd3dc2598e37a64b.html#a66f936cfbd252f85bd3dc2598e37a64b">nlohmann::basic_json::push_back</a></div><div class="ttdeci">void push_back(basic_json &amp;&amp;val)</div><div class="ttdoc">add an object to an array </div><div class="ttdef"><b>Definition:</b> <a href="json_8hpp_source.html#l04298">json.hpp:4298</a></div></div>
<div class="ttc" id="namespacenlohmann_html"><div class="ttname"><a href="namespacenlohmann.html">nlohmann</a></div><div class="ttdoc">namespace for Niels Lohmann </div><div class="ttdef"><b>Definition:</b> <a href="json_8hpp_source.html#l00088">json.hpp:88</a></div></div>
</div><!-- fragment --> Output (play with this example <a target="_blank" href="http://melpon.org/wandbox/permlink/5ZglUDvkQ0VxYxQ4"><b>online</b></a>): <pre class="fragment">[1,2,3,4,5]
null
[1,2,3,4,5,6,7]
["first","second"]
</pre> The example code above can be translated with<pre class="fragment">g++ -std=c++11 -Isrc doc/examples/push_back.cpp -o push_back </pre></dd></dl>
<dl class="section since"><dt>Since</dt><dd>version 1.0.0 </dd></dl>
<p>Definition at line <a class="el" href="json_8hpp_source.html#l04324">4324</a> of file <a class="el" href="json_8hpp_source.html">json.hpp</a>.</p>
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