210 lines
15 KiB
HTML
210 lines
15 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
|
<meta name="generator" content="Doxygen 1.8.9.1"/>
|
|
<title>JSON for Modern C++: nlohmann::basic_json::basic_json</title>
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="jquery.js"></script>
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
|
<link href="navtree.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="resize.js"></script>
|
|
<script type="text/javascript" src="navtreedata.js"></script>
|
|
<script type="text/javascript" src="navtree.js"></script>
|
|
<script type="text/javascript">
|
|
$(document).ready(initResizable);
|
|
$(window).load(resizeHeight);
|
|
</script>
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="search/searchdata.js"></script>
|
|
<script type="text/javascript" src="search/search.js"></script>
|
|
<script type="text/javascript">
|
|
$(document).ready(function() { init_search(); });
|
|
</script>
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
|
<link href="mylayout.css" rel="stylesheet" type="text/css"/>
|
|
</head>
|
|
<body>
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
|
<div id="titlearea">
|
|
<table cellspacing="0" cellpadding="0">
|
|
<tbody>
|
|
<tr style="height: 56px;">
|
|
<td style="padding-left: 0.5em;">
|
|
<div id="projectname">JSON for Modern C++
|
|
 <span id="projectnumber">3.0</span>
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<!-- end header part -->
|
|
<!-- Generated by Doxygen 1.8.9.1 -->
|
|
<script type="text/javascript">
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
|
</script>
|
|
<div id="navrow1" class="tabs">
|
|
<ul class="tablist">
|
|
<li><a href="index.html"><span>Main Page</span></a></li>
|
|
<li><a href="annotated.html"><span>Classes</span></a></li>
|
|
<li>
|
|
<div id="MSearchBox" class="MSearchBoxInactive">
|
|
<span class="left">
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
alt=""/>
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
|
</span><span class="right">
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
|
</span>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div><!-- top -->
|
|
<div id="side-nav" class="ui-resizable side-nav-resizable">
|
|
<div id="nav-tree">
|
|
<div id="nav-tree-contents">
|
|
<div id="nav-sync" class="sync"></div>
|
|
</div>
|
|
</div>
|
|
<div id="splitbar" style="-moz-user-select:none;"
|
|
class="ui-resizable-handle">
|
|
</div>
|
|
</div>
|
|
<script type="text/javascript">
|
|
$(document).ready(function(){initNavTree('classnlohmann_1_1basic__json_a951a76ba057b3be948e7ba5c2c01cd5a.html','');});
|
|
</script>
|
|
<div id="doc-content">
|
|
<!-- window showing the filter options -->
|
|
<div id="MSearchSelectWindow"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
|
</div>
|
|
|
|
<!-- iframe showing the search results (closed by default) -->
|
|
<div id="MSearchResultsWindow">
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
|
name="MSearchResults" id="MSearchResults">
|
|
</iframe>
|
|
</div>
|
|
|
|
<div class="contents">
|
|
<a class="anchor" id="a951a76ba057b3be948e7ba5c2c01cd5a"></a>
|
|
<div class="memitem">
|
|
<div class="memproto">
|
|
<div class="memtemplate">
|
|
template<template< typename U, typename V, typename...Args > class ObjectType = std::map, template< typename U, typename...Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator> </div>
|
|
<div class="memtemplate">
|
|
template<class CompatibleObjectType , typename std::enable_if< std::is_constructible< typename object_t::key_type, typename CompatibleObjectType::key_type >::value andstd::is_constructible< basic_json, typename CompatibleObjectType::mapped_type >::value, int >::type = 0> </div>
|
|
<table class="mlabels">
|
|
<tr>
|
|
<td class="mlabels-left">
|
|
<table class="memname">
|
|
<tr>
|
|
<td class="memname"><a class="el" href="classnlohmann_1_1basic__json.html">nlohmann::basic_json</a>::<a class="el" href="classnlohmann_1_1basic__json.html">basic_json</a> </td>
|
|
<td>(</td>
|
|
<td class="paramtype">const CompatibleObjectType & </td>
|
|
<td class="paramname"><em>value</em></td><td>)</td>
|
|
<td></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
<td class="mlabels-right">
|
|
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
|
|
</tr>
|
|
</table>
|
|
</div><div class="memdoc">
|
|
<p>Create an object JSON value with a given content. This constructor allows any type that can be used to construct values of type <a class="el" href="classnlohmann_1_1basic__json_a63691315292df8e1522b00d37ebb1ffc.html#a63691315292df8e1522b00d37ebb1ffc">object_t</a>. Examples include the types <code>std::map</code> and <code>std::unordered_map</code>.</p>
|
|
<dl class="tparams"><dt>Template Parameters</dt><dd>
|
|
<table class="tparams">
|
|
<tr><td class="paramname">CompatibleObjectType</td><td>an object type whose <code>key_type</code> and <code>value_type</code> is compatible to <a class="el" href="classnlohmann_1_1basic__json_a63691315292df8e1522b00d37ebb1ffc.html#a63691315292df8e1522b00d37ebb1ffc">object_t</a></td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
<dl class="params"><dt>Parameters</dt><dd>
|
|
<table class="params">
|
|
<tr><td class="paramname">value</td><td>a value for the object</td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
<dl class="section user"><dt>Complexity</dt><dd>Linear in the size of the passed <em>value</em>.</dd></dl>
|
|
<dl class="exception"><dt>Exceptions</dt><dd>
|
|
<table class="exception">
|
|
<tr><td class="paramname">std::bad_alloc</td><td>if allocation for object value fails (thrown by the constructor of <a class="el" href="unionnlohmann_1_1basic__json_1_1json__value.html">json_value</a>)</td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
<dl class="section user"><dt>Example</dt><dd>The following code shows the constructor with several compatible object type parameters. <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#include <json.hpp></span></div>
|
|
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#include <unordered_map></span></div>
|
|
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div>
|
|
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="keyword">using namespace </span><a class="code" href="namespacenlohmann.html">nlohmann</a>;</div>
|
|
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> </div>
|
|
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="keywordtype">int</span> main()</div>
|
|
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> {</div>
|
|
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  <span class="comment">// create an object from std::map</span></div>
|
|
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  std::map<std::string, int> c_map</div>
|
|
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  {</div>
|
|
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  {<span class="stringliteral">"one"</span>, 1}, {<span class="stringliteral">"two"</span>, 2}, {<span class="stringliteral">"three"</span>, 3}</div>
|
|
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  };</div>
|
|
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <a class="code" href="classnlohmann_1_1basic__json.html">json</a> j_map(c_map);</div>
|
|
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
|
|
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="comment">// create an object from std::unordered_map</span></div>
|
|
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  std::unordered_map<const char*, double> c_umap</div>
|
|
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  {</div>
|
|
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  {<span class="stringliteral">"one"</span>, 1.2}, {<span class="stringliteral">"two"</span>, 2.3}, {<span class="stringliteral">"three"</span>, 3.4}</div>
|
|
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  };</div>
|
|
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <a class="code" href="classnlohmann_1_1basic__json.html">json</a> j_umap(c_umap);</div>
|
|
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
|
|
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment">// create an object from std::multimap</span></div>
|
|
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  std::multimap<std::string, bool> c_mmap</div>
|
|
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  {</div>
|
|
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  {<span class="stringliteral">"one"</span>, <span class="keyword">true</span>}, {<span class="stringliteral">"two"</span>, <span class="keyword">true</span>}, {<span class="stringliteral">"three"</span>, <span class="keyword">false</span>}, {<span class="stringliteral">"three"</span>, <span class="keyword">true</span>}</div>
|
|
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  };</div>
|
|
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <a class="code" href="classnlohmann_1_1basic__json.html">json</a> j_mmap(c_mmap); <span class="comment">// only one entry for key "three" is used</span></div>
|
|
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
|
|
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="comment">// create an object from std::unordered_multimap</span></div>
|
|
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  std::unordered_multimap<std::string, bool> c_ummap</div>
|
|
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {</div>
|
|
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  {<span class="stringliteral">"one"</span>, <span class="keyword">true</span>}, {<span class="stringliteral">"two"</span>, <span class="keyword">true</span>}, {<span class="stringliteral">"three"</span>, <span class="keyword">false</span>}, {<span class="stringliteral">"three"</span>, <span class="keyword">true</span>}</div>
|
|
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  };</div>
|
|
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <a class="code" href="classnlohmann_1_1basic__json.html">json</a> j_ummap(c_ummap); <span class="comment">// only one entry for key "three" is used</span></div>
|
|
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
|
|
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// serialize the JSON objects</span></div>
|
|
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  std::cout << j_map << <span class="charliteral">'\n'</span>;</div>
|
|
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  std::cout << j_umap << <span class="charliteral">'\n'</span>;</div>
|
|
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  std::cout << j_mmap << <span class="charliteral">'\n'</span>;</div>
|
|
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  std::cout << j_ummap << <span class="charliteral">'\n'</span>;</div>
|
|
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> }</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> json.hpp:113</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> json.hpp:49</div></div>
|
|
</div><!-- fragment --> Output: <pre class="fragment">{"one":1,"three":3,"two":2}
|
|
{"one":1.2,"three":3.4,"two":2.3}
|
|
{"one":true,"three":false,"two":true}
|
|
{"one":true,"three":false,"two":true}
|
|
</pre> The example code above can be translated with<pre class="fragment">g++ -std=c++11 -Isrc doc/examples/basic_json__CompatibleObjectType.cpp -o basic_json__CompatibleObjectType </pre>.</dd></dl>
|
|
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classnlohmann_1_1basic__json_a0a9c6a1fccc4db365860463e8203eb38.html#a0a9c6a1fccc4db365860463e8203eb38" title="create an object (explicit) ">basic_json(const object_t&)</a> </dd></dl>
|
|
|
|
</div>
|
|
</div>
|
|
</div><!-- contents -->
|
|
</div><!-- doc-content -->
|
|
<!-- start footer part -->
|
|
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
|
|
<ul>
|
|
<li class="navelem"><a class="el" href="namespacenlohmann.html">nlohmann</a></li><li class="navelem"><a class="el" href="classnlohmann_1_1basic__json.html">basic_json</a></li>
|
|
<li class="footer">Generated on Sun Jun 21 2015 21:49:32 for JSON for Modern C++ by
|
|
<a href="http://www.doxygen.org/index.html">
|
|
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.9.1 </li>
|
|
</ul>
|
|
</div>
|
|
</body>
|
|
</html>
|