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26 <div class="titlepage"><div><div><h5 class="title">
27 <a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___"></a><a name="group__rtree__functions_1gaba44e2fb12fdc7b528bfee56a88e0844"></a><a class="link" href="empty_rtree______const___.html" title="empty(rtree&lt;...&gt; const &amp;)">empty(rtree&lt;...&gt;
28           const &amp;)</a>
29 </h5></div></div></div>
30 <p>
31             <a class="indexterm" name="idm46186977540592"></a>
32 Query if there are no values stored in the index.
33           </p>
34 <h6>
35 <a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.h0"></a>
36             <span class="phrase"><a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.description"></a></span><a class="link" href="empty_rtree______const___.html#geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.description">Description</a>
37           </h6>
38 <p>
39             It calls <code class="literal"><a class="link" href="../boost__geometry__index__rtree/empty__.html#classboost_1_1geometry_1_1index_1_1rtree_1a18bed92ff302df192215c3809fe5272e">rtree::empty()</a></code>.
40           </p>
41 <h6>
42 <a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.h1"></a>
43             <span class="phrase"><a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.synopsis"></a></span><a class="link" href="empty_rtree______const___.html#geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.synopsis">Synopsis</a>
44           </h6>
45 <pre class="programlisting"><code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span></code><code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">Value</span></code><code class="computeroutput"><span class="special">,</span></code>
46          <code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">Parameters</span></code><code class="computeroutput"><span class="special">,</span></code>
47          <code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">IndexableGetter</span></code><code class="computeroutput"><span class="special">,</span></code>
48          <code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">EqualTo</span></code><code class="computeroutput"><span class="special">,</span></code>
49          <code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">Allocator</span></code><code class="computeroutput"><span class="special">&gt;</span></code>
50 <code class="computeroutput"><span class="keyword">bool</span></code> <code class="computeroutput"><span class="identifier">empty</span></code><code class="computeroutput"><span class="special">(</span></code><code class="computeroutput"><span class="identifier">rtree</span><span class="special">&lt;</span> <span class="identifier">Value</span><span class="special">,</span> <span class="identifier">Parameters</span><span class="special">,</span> <span class="identifier">IndexableGetter</span><span class="special">,</span> <span class="identifier">EqualTo</span><span class="special">,</span> <span class="identifier">Allocator</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span></code> <code class="computeroutput"><span class="identifier">tree</span></code><code class="computeroutput"><span class="special">)</span></code>
51 </pre>
52 <h6>
53 <a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.h2"></a>
54             <span class="phrase"><a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.parameter_s_"></a></span><a class="link" href="empty_rtree______const___.html#geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.parameter_s_">Parameter(s)</a>
55           </h6>
56 <div class="informaltable"><table class="table">
57 <colgroup>
58 <col>
59 <col>
60 <col>
61 </colgroup>
62 <thead><tr>
63 <th>
64                     <p>
65                       Type
66                     </p>
67                   </th>
68 <th>
69                     <p>
70                       Name
71                     </p>
72                   </th>
73 <th>
74                     <p>
75                       Description
76                     </p>
77                   </th>
78 </tr></thead>
79 <tbody><tr>
80 <td>
81                     <p>
82                       <code class="computeroutput"><span class="identifier">rtree</span><span class="special">&lt;</span>
83                       <span class="identifier">Value</span><span class="special">,</span>
84                       <span class="identifier">Parameters</span><span class="special">,</span>
85                       <span class="identifier">IndexableGetter</span><span class="special">,</span>
86                       <span class="identifier">EqualTo</span><span class="special">,</span>
87                       <span class="identifier">Allocator</span> <span class="special">&gt;</span>
88                       <span class="keyword">const</span> <span class="special">&amp;</span></code>
89                     </p>
90                   </td>
91 <td>
92                     <p>
93                       <code class="computeroutput"><span class="identifier">tree</span></code>
94                     </p>
95                   </td>
96 <td>
97                     <p>
98                       The spatial index.
99                     </p>
100                   </td>
101 </tr></tbody>
102 </table></div>
103 <h6>
104 <a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.h3"></a>
105             <span class="phrase"><a name="geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.returns"></a></span><a class="link" href="empty_rtree______const___.html#geometry.reference.spatial_indexes.group__rtree__functions.empty_rtree______const___.returns">Returns</a>
106           </h6>
107 <p>
108             true if there are no values in the index.
109           </p>
110 </div>
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