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<li class="navelem"><a class="el" href="namespacerttr.html">rttr</a></li><li class="navelem"><a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a></li> </ul>
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<p>The <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> describes a class that refers to an <a href="https://en.wikipedia.org/wiki/Associative_containers" target="_blank">associative container</a> (e.g: <code>std::map</code>) inside a <a class="el" href="classrttr_1_1variant.html">variant</a>.
<a href="classrttr_1_1variant__associative__view.html#details">More...</a></p>
<p><code>#include <<a class="el" href="variant__associative__view_8h_source.html">variant_associative_view.h</a>></code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">The <a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">variant_associative_view::const_iterator</a> allows iteration over an associative container in a variant. <a href="classrttr_1_1variant__associative__view_1_1const__iterator.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><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:a2988a0bb2d65876f20abf37e3a8b7078"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a2988a0bb2d65876f20abf37e3a8b7078">variant_associative_view</a> ()</td></tr>
<tr class="memdesc:a2988a0bb2d65876f20abf37e3a8b7078"><td class="mdescLeft"> </td><td class="mdescRight">Constructs an invalid <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> object. <a href="#a2988a0bb2d65876f20abf37e3a8b7078">More...</a><br /></td></tr>
<tr class="separator:a2988a0bb2d65876f20abf37e3a8b7078"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3ba9357e415624b7fe33d30f9d2a8384"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a3ba9357e415624b7fe33d30f9d2a8384">variant_associative_view</a> (const <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> &other)</td></tr>
<tr class="memdesc:a3ba9357e415624b7fe33d30f9d2a8384"><td class="mdescLeft"> </td><td class="mdescRight">Constructs a copy of the given <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> <code>other</code>. <a href="#a3ba9357e415624b7fe33d30f9d2a8384">More...</a><br /></td></tr>
<tr class="separator:a3ba9357e415624b7fe33d30f9d2a8384"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a89fbfb6739fbc1bbcb9a4667fa8f0366"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a89fbfb6739fbc1bbcb9a4667fa8f0366">~variant_associative_view</a> () noexcept</td></tr>
<tr class="memdesc:a89fbfb6739fbc1bbcb9a4667fa8f0366"><td class="mdescLeft"> </td><td class="mdescRight">Destroys the <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. <a href="#a89fbfb6739fbc1bbcb9a4667fa8f0366">More...</a><br /></td></tr>
<tr class="separator:a89fbfb6739fbc1bbcb9a4667fa8f0366"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3e101465c9cc48a3899d7c6d2ba1d6b3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a3e101465c9cc48a3899d7c6d2ba1d6b3">begin</a> () const</td></tr>
<tr class="memdesc:a3e101465c9cc48a3899d7c6d2ba1d6b3"><td class="mdescLeft"> </td><td class="mdescRight">Returns an iterator to the first element of the container. <a href="#a3e101465c9cc48a3899d7c6d2ba1d6b3">More...</a><br /></td></tr>
<tr class="separator:a3e101465c9cc48a3899d7c6d2ba1d6b3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afd8bddb25e0cbc400087466dc3e1bbe8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#afd8bddb25e0cbc400087466dc3e1bbe8">clear</a> ()</td></tr>
<tr class="memdesc:afd8bddb25e0cbc400087466dc3e1bbe8"><td class="mdescLeft"> </td><td class="mdescRight">Removes all elements from the container. <a href="#afd8bddb25e0cbc400087466dc3e1bbe8">More...</a><br /></td></tr>
<tr class="separator:afd8bddb25e0cbc400087466dc3e1bbe8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a394316f0ca21525dd75371fc64220bb7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a394316f0ca21525dd75371fc64220bb7">end</a> () const</td></tr>
<tr class="memdesc:a394316f0ca21525dd75371fc64220bb7"><td class="mdescLeft"> </td><td class="mdescRight">Returns an iterator to the element following the last element of the container. <a href="#a394316f0ca21525dd75371fc64220bb7">More...</a><br /></td></tr>
<tr class="separator:a394316f0ca21525dd75371fc64220bb7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a59c011d81b150ecaf467544ce9b7a23e"><td class="memItemLeft" align="right" valign="top">std::pair< <a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a>, <a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a59c011d81b150ecaf467544ce9b7a23e">equal_range</a> (<a class="el" href="classrttr_1_1argument.html">argument</a> key)</td></tr>
<tr class="memdesc:a59c011d81b150ecaf467544ce9b7a23e"><td class="mdescLeft"> </td><td class="mdescRight">Returns a range containing all elements with the given <code>key</code> in the container. <a href="#a59c011d81b150ecaf467544ce9b7a23e">More...</a><br /></td></tr>
<tr class="separator:a59c011d81b150ecaf467544ce9b7a23e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a97db97bcf1ffaeab5e9fd9ed98b1539e"><td class="memItemLeft" align="right" valign="top">std::size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a97db97bcf1ffaeab5e9fd9ed98b1539e">erase</a> (<a class="el" href="classrttr_1_1argument.html">argument</a> key)</td></tr>
<tr class="memdesc:a97db97bcf1ffaeab5e9fd9ed98b1539e"><td class="mdescLeft"> </td><td class="mdescRight">Removes the element (if one exists) with the key equivalent to <code>key</code>. <a href="#a97db97bcf1ffaeab5e9fd9ed98b1539e">More...</a><br /></td></tr>
<tr class="separator:a97db97bcf1ffaeab5e9fd9ed98b1539e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0ed8049087f55050f1297302b87ff7c0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a0ed8049087f55050f1297302b87ff7c0">find</a> (<a class="el" href="classrttr_1_1argument.html">argument</a> key)</td></tr>
<tr class="memdesc:a0ed8049087f55050f1297302b87ff7c0"><td class="mdescLeft"> </td><td class="mdescRight">Finds an element with specific key <code>key</code> . <a href="#a0ed8049087f55050f1297302b87ff7c0">More...</a><br /></td></tr>
<tr class="separator:a0ed8049087f55050f1297302b87ff7c0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5664ffb8530ef5eaee99120d929290fe"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1type.html">type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a5664ffb8530ef5eaee99120d929290fe">get_key_type</a> () const noexcept</td></tr>
<tr class="memdesc:a5664ffb8530ef5eaee99120d929290fe"><td class="mdescLeft"> </td><td class="mdescRight">Returns the <a class="el" href="classrttr_1_1type.html">type</a> from the key of this associative container. <a href="#a5664ffb8530ef5eaee99120d929290fe">More...</a><br /></td></tr>
<tr class="separator:a5664ffb8530ef5eaee99120d929290fe"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9b6438cc91b38518cbf6457997904b46"><td class="memItemLeft" align="right" valign="top">std::size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a9b6438cc91b38518cbf6457997904b46">get_size</a> () const noexcept</td></tr>
<tr class="memdesc:a9b6438cc91b38518cbf6457997904b46"><td class="mdescLeft"> </td><td class="mdescRight">Returns the number of elements in the associative container. <a href="#a9b6438cc91b38518cbf6457997904b46">More...</a><br /></td></tr>
<tr class="separator:a9b6438cc91b38518cbf6457997904b46"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aae680a320082edd47f27a12fb78a4880"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1type.html">type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#aae680a320082edd47f27a12fb78a4880">get_type</a> () const noexcept</td></tr>
<tr class="memdesc:aae680a320082edd47f27a12fb78a4880"><td class="mdescLeft"> </td><td class="mdescRight">Returns the <a class="el" href="classrttr_1_1type.html">type</a> object of this associative container. <a href="#aae680a320082edd47f27a12fb78a4880">More...</a><br /></td></tr>
<tr class="separator:aae680a320082edd47f27a12fb78a4880"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aac7253214126d3e8d463ea5eb970fe56"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1type.html">type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#aac7253214126d3e8d463ea5eb970fe56">get_value_type</a> () const noexcept</td></tr>
<tr class="memdesc:aac7253214126d3e8d463ea5eb970fe56"><td class="mdescLeft"> </td><td class="mdescRight">Returns the <a class="el" href="classrttr_1_1type.html">type</a> object from the value of this associative container. <a href="#aac7253214126d3e8d463ea5eb970fe56">More...</a><br /></td></tr>
<tr class="separator:aac7253214126d3e8d463ea5eb970fe56"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6a3efc23addf1f4d4ee1f0d31eaf876c"><td class="memItemLeft" align="right" valign="top">std::pair< <a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a>, bool > </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a6a3efc23addf1f4d4ee1f0d31eaf876c">insert</a> (<a class="el" href="classrttr_1_1argument.html">argument</a> key)</td></tr>
<tr class="memdesc:a6a3efc23addf1f4d4ee1f0d31eaf876c"><td class="mdescLeft"> </td><td class="mdescRight">Insert a key into the container. <a href="#a6a3efc23addf1f4d4ee1f0d31eaf876c">More...</a><br /></td></tr>
<tr class="separator:a6a3efc23addf1f4d4ee1f0d31eaf876c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a11d707aeb1a0d418073fcf4dc521a3bb"><td class="memItemLeft" align="right" valign="top">std::pair< <a class="el" href="classrttr_1_1variant__associative__view_1_1const__iterator.html">const_iterator</a>, bool > </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a11d707aeb1a0d418073fcf4dc521a3bb">insert</a> (<a class="el" href="classrttr_1_1argument.html">argument</a> key, <a class="el" href="classrttr_1_1argument.html">argument</a> <a class="el" href="namespacerttr.html#a54ecd8bad715cbc451e7aa8491667d4a">value</a>)</td></tr>
<tr class="memdesc:a11d707aeb1a0d418073fcf4dc521a3bb"><td class="mdescLeft"> </td><td class="mdescRight">Insert a key-value pair into the container. <a href="#a11d707aeb1a0d418073fcf4dc521a3bb">More...</a><br /></td></tr>
<tr class="separator:a11d707aeb1a0d418073fcf4dc521a3bb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a821c304c63aa32045c04b92b412da08c"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a821c304c63aa32045c04b92b412da08c">is_empty</a> () const noexcept</td></tr>
<tr class="memdesc:a821c304c63aa32045c04b92b412da08c"><td class="mdescLeft"> </td><td class="mdescRight">Checks if the container has no elements. <a href="#a821c304c63aa32045c04b92b412da08c">More...</a><br /></td></tr>
<tr class="separator:a821c304c63aa32045c04b92b412da08c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a54402625e4287567c1141ba1eb13eeb5"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a54402625e4287567c1141ba1eb13eeb5">is_key_only_type</a> () const noexcept</td></tr>
<tr class="memdesc:a54402625e4287567c1141ba1eb13eeb5"><td class="mdescLeft"> </td><td class="mdescRight">Returns <code>true</code>, when this associative container stores only keys. <a href="#a54402625e4287567c1141ba1eb13eeb5">More...</a><br /></td></tr>
<tr class="separator:a54402625e4287567c1141ba1eb13eeb5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae5cc73903f1f07307f422a2b03eab552"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#ae5cc73903f1f07307f422a2b03eab552">is_valid</a> () const noexcept</td></tr>
<tr class="memdesc:ae5cc73903f1f07307f422a2b03eab552"><td class="mdescLeft"> </td><td class="mdescRight">Returns true if this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> is valid, that means the object is holding some data. <a href="#ae5cc73903f1f07307f422a2b03eab552">More...</a><br /></td></tr>
<tr class="separator:ae5cc73903f1f07307f422a2b03eab552"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9091edc2897ea2eca55534fb782fa3f7"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a9091edc2897ea2eca55534fb782fa3f7">operator bool</a> () const noexcept</td></tr>
<tr class="memdesc:a9091edc2897ea2eca55534fb782fa3f7"><td class="mdescLeft"> </td><td class="mdescRight">Convenience function to check if this <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> is valid or not. <a href="#a9091edc2897ea2eca55534fb782fa3f7">More...</a><br /></td></tr>
<tr class="separator:a9091edc2897ea2eca55534fb782fa3f7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6daa21493e030bfc800da7bb55d385ef"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#a6daa21493e030bfc800da7bb55d385ef">operator=</a> (const <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> &other) noexcept</td></tr>
<tr class="memdesc:a6daa21493e030bfc800da7bb55d385ef"><td class="mdescLeft"> </td><td class="mdescRight">Assigns the value of the <em>other</em> <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> to this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. <a href="#a6daa21493e030bfc800da7bb55d385ef">More...</a><br /></td></tr>
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<tr class="memitem:aeef08c71cfb79f7e57d4f2e33336e3eb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classrttr_1_1variant__associative__view.html#aeef08c71cfb79f7e57d4f2e33336e3eb">swap</a> (<a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> &other) noexcept</td></tr>
<tr class="memdesc:aeef08c71cfb79f7e57d4f2e33336e3eb"><td class="mdescLeft"> </td><td class="mdescRight">Swaps this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> with the <em>other</em> <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. <a href="#aeef08c71cfb79f7e57d4f2e33336e3eb">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>The <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> describes a class that refers to an <a href="https://en.wikipedia.org/wiki/Associative_containers" target="_blank">associative container</a> (e.g: <code>std::map</code>) inside a <a class="el" href="classrttr_1_1variant.html">variant</a>. </p>
<p>With an instance of that class you can set/get values of such container, without having access to the type declaration of the type or it's elements.</p>
<p>A <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> can be created directly from a <a class="el" href="classrttr_1_1variant.html">variant</a> with its member function <a class="el" href="classrttr_1_1variant.html#a797610655507c3bbd1383dd44d967463">create_associative_view()</a>. </p><dl class="section remark"><dt>Remarks</dt><dd>The instance of an <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> is always valid as long as the referenced <a class="el" href="classrttr_1_1variant.html">variant</a> is valid, otherwise accessing a <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> is undefined behaviour.</dd></dl>
<h2>Meta Information </h2>
<p>RTTR recognize whether a type is an associative container or not with the help of the <a class="el" href="structrttr_1_1associative__container__mapper.html">associative_container_mapper</a> class template. This call can access different container types via one common interface. At the moment there exist specializations for following types: <code>std::set<Key></code>, <code>std::map<Key, T></code>, <code>std::multiset<Key></code>, <code>std::multimap<Key, T></code>, <code>std::unordered_set<Key></code>, <code>std::unordered_map<Key, T></code>, <code>std::unordered_multiset<Key></code> and <code>std::unordered_multimap<Key, T></code>.</p>
<h2>Copying and Assignment </h2>
<p>A <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> object can be copied and assigned, however each copy will reference the data of same underlying <a class="el" href="classrttr_1_1variant.html">variant</a> value.</p>
<h2>Typical Usage </h2>
<div class="fragment"><div class="line">std::map<int, std::string> my_map = { { 1, <span class="stringliteral">"one"</span> }, { 2, <span class="stringliteral">"two"</span> }, { 3, <span class="stringliteral">"three"</span> } };</div><div class="line"><a class="code" href="classrttr_1_1variant__associative__view.html#ad4f13d06475a06f860c63bc68d0c8a4b">variant</a> var = my_map;</div><div class="line"><span class="keywordflow">if</span> (var.is_associative_container())</div><div class="line">{</div><div class="line"> <a class="code" href="classrttr_1_1variant__associative__view.html#a2988a0bb2d65876f20abf37e3a8b7078">variant_associative_view</a> view = var.create_associative_view();</div><div class="line"> std::cout << view.get_size() << std::endl; <span class="comment">// prints: '3'</span></div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& item : view)</div><div class="line"> {</div><div class="line"> <span class="comment">// remark that the key and value are stored inside a 'std::reference_wrapper'</span></div><div class="line"> std::cout << <span class="stringliteral">"Key: "</span> << item.first.extract_wrapped_value().to_string() << <span class="stringliteral">" "</span>;</div><div class="line"> std::cout << <span class="stringliteral">"Value: "</span> << item.second.extract_wrapped_value().to_string() << std::endl;</div><div class="line"> }</div><div class="line">}</div></div><!-- fragment --><dl class="section see"><dt>See also</dt><dd><a class="el" href="classrttr_1_1variant.html" title="The variant class allows to store data of any type and convert between these types transparently.">variant</a> </dd></dl>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<p>Constructs an invalid <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> object. </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classrttr_1_1variant__associative__view.html#ae5cc73903f1f07307f422a2b03eab552" title="Returns true if this variant_associative_view is valid, that means the object is holding some data.">is_valid()</a> </dd></dl>
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<p>Constructs a copy of the given <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> <code>other</code>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a89fbfb6739fbc1bbcb9a4667fa8f0366">◆ </a></span>~variant_associative_view()</h2>
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<p>Destroys the <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. </p>
<dl class="section remark"><dt>Remarks</dt><dd>The underlying data is not destroyed. </dd></dl>
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<h2 class="groupheader">Member Function Documentation</h2>
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<p>Returns an iterator to the first element of the container. </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classrttr_1_1variant__associative__view.html#a394316f0ca21525dd75371fc64220bb7" title="Returns an iterator to the element following the last element of the container.">end()</a></dd></dl>
<dl class="section return"><dt>Returns</dt><dd>Iterator to the first element . </dd></dl>
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<p>Removes all elements from the container. </p>
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<p>Returns an iterator to the element following the last element of the container. </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classrttr_1_1variant__associative__view.html#a3e101465c9cc48a3899d7c6d2ba1d6b3" title="Returns an iterator to the first element of the container.">begin()</a></dd></dl>
<dl class="section return"><dt>Returns</dt><dd>Iterator to the element following the last element. </dd></dl>
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<p>Returns a range containing all elements with the given <code>key</code> in the container. </p>
<p>Example code: </p><div class="fragment"><div class="line"><span class="keyword">auto</span> multimap = std::multimap<int, std::string>{ { 1, <span class="stringliteral">"A"</span> }, { 2, <span class="stringliteral">"B"</span> }, { 2, <span class="stringliteral">"C"</span>}, { 2, <span class="stringliteral">"D"</span> },</div><div class="line"> { 3, <span class="stringliteral">"E"</span> }, { 3, <span class="stringliteral">"F"</span> } };</div><div class="line"></div><div class="line"><a class="code" href="classrttr_1_1variant__associative__view.html#ad4f13d06475a06f860c63bc68d0c8a4b">variant</a> var = multimap;</div><div class="line"></div><div class="line"><span class="keyword">auto</span> view = var.create_associative_view();</div><div class="line"><span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i <= 3; ++i)</div><div class="line">{</div><div class="line"> std::cout << i << <span class="stringliteral">" =>"</span>;</div><div class="line"> <span class="keyword">auto</span> range = view.equal_range(i);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">auto</span> itr = range.first; itr != range.second; ++itr)</div><div class="line"> {</div><div class="line"> std::cout << <span class="stringliteral">" "</span> << itr.value().extract_wrapped_value().to_string();</div><div class="line"> }</div><div class="line"> std::cout << std::endl;</div><div class="line">}</div></div><!-- fragment --><p>Output: </p><div class="fragment"><div class="line">1 => A</div><div class="line">2 => B C D</div><div class="line">3 => E, F</div></div><!-- fragment --><dl class="section return"><dt>Returns</dt><dd>std::pair containing a pair of iterators defining the wanted range: the first pointing to the first element that is not less than <code>key</code> and the second pointing to the first element greater than <code>key</code>. </dd></dl>
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<p>Removes the element (if one exists) with the key equivalent to <code>key</code>. </p>
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<p>Finds an element with specific key <code>key</code> . </p>
<dl class="section return"><dt>Returns</dt><dd>The element with key equivalent to <code>key</code>. If no element is found an invalid iterator is returned. </dd></dl>
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<p>Returns the <a class="el" href="classrttr_1_1type.html">type</a> from the key of this associative container. </p>
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<p>Returns the number of elements in the associative container. </p>
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<p>Returns the <a class="el" href="classrttr_1_1type.html">type</a> object of this associative container. </p>
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<p>Returns the <a class="el" href="classrttr_1_1type.html">type</a> object from the value of this associative container. </p>
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<p>Insert a key into the container. </p>
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<p>Insert a key-value pair into the container. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a821c304c63aa32045c04b92b412da08c">◆ </a></span>is_empty()</h2>
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<td class="memname">bool rttr::variant_associative_view::is_empty </td>
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<p>Checks if the container has no elements. </p>
<dl class="section return"><dt>Returns</dt><dd><code>true</code> if container is empty, otherwise <code>false</code>. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a54402625e4287567c1141ba1eb13eeb5">◆ </a></span>is_key_only_type()</h2>
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<p>Returns <code>true</code>, when this associative container stores only keys. </p>
<p>When also value are stored, it will return <code>false</code>.</p>
<p>For example an <code>std::set</code> has no values, it's a key-only associative container. Then this method returns <code>true</code>. An <code>std::map<K,V></code> on the other hand contains keys and values. So this method will then return <code>false</code>. A simple convenience method instead of calling: <code><a class="el" href="classrttr_1_1variant__associative__view.html#aac7253214126d3e8d463ea5eb970fe56" title="Returns the type object from the value of this associative container.">get_value_type()</a>.<a class="el" href="classrttr_1_1variant__associative__view.html#ae5cc73903f1f07307f422a2b03eab552" title="Returns true if this variant_associative_view is valid, that means the object is holding some data.">is_valid()</a> == false;</code></p>
<dl class="section return"><dt>Returns</dt><dd><code>true</code>, when this associative container stores only keys; otherwise <code>false</code>. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ae5cc73903f1f07307f422a2b03eab552">◆ </a></span>is_valid()</h2>
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<p>Returns true if this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> is valid, that means the object is holding some data. </p>
<p>When the <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> doesn't hold any data it will return false.</p>
<dl class="section return"><dt>Returns</dt><dd>True if this <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> is valid, otherwise false. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a9091edc2897ea2eca55534fb782fa3f7">◆ </a></span>operator bool()</h2>
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<p>Convenience function to check if this <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> is valid or not. </p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classrttr_1_1variant__associative__view.html#ae5cc73903f1f07307f422a2b03eab552" title="Returns true if this variant_associative_view is valid, that means the object is holding some data.">is_valid()</a></dd></dl>
<dl class="section return"><dt>Returns</dt><dd>True if this <a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a> is valid, otherwise false. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a6daa21493e030bfc800da7bb55d385ef">◆ </a></span>operator=()</h2>
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<td class="memname"><a class="el" href="classrttr_1_1variant__associative__view.html">variant_associative_view</a>& rttr::variant_associative_view::operator= </td>
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<p>Assigns the value of the <em>other</em> <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> to this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. </p>
<dl class="section return"><dt>Returns</dt><dd>A reference to the <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> with the new data. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#aeef08c71cfb79f7e57d4f2e33336e3eb">◆ </a></span>swap()</h2>
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<td class="memname">void rttr::variant_associative_view::swap </td>
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<p>Swaps this <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a> with the <em>other</em> <a class="el" href="classrttr_1_1variant__associative__view.html" title="The variant_associative_view describes a class that refers to an associative container (e....">variant_associative_view</a>. </p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="variant__associative__view_8h_source.html">variant_associative_view.h</a></li>
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