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| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___"></a><a name="classboost_1_1geometry_1_1index_1_1rtree_1a63d15f3b5b157a47045fcac3fec3b7a0"></a><a class="link" href="qbegin_predicates_const___.html" title="qbegin(Predicates const &)">qbegin(Predicates |
| const &)</a> |
| </h5></div></div></div> |
| <p> |
| <a class="indexterm" name="idp127277072"></a> |
| Returns the query iterator pointing at the begin of the query range. |
| </p> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h0"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.description"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.description">Description</a> |
| </h6> |
| <p> |
| This method returns the iterator which may be used to perform iterative |
| queries. For the information about the predicates which may be passed |
| to this method see <a class="link" href="query_predicates_const____outiter_.html#classboost_1_1geometry_1_1index_1_1rtree_1a7baa88eb4e7a5c640ab847513de45b3e">query()</a>. |
| </p> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h1"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.synopsis"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.synopsis">Synopsis</a> |
| </h6> |
| <pre class="programlisting"><code class="computeroutput"><span class="keyword">template</span><span class="special"><</span></code><code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">Predicates</span></code><code class="computeroutput"><span class="special">></span></code> |
| <code class="literal"><a class="link" href="../boost__geometry__index__rtree.html#classboost_1_1geometry_1_1index_1_1rtree_1a83fce1047d890f327ea195ed252af176">const_query_iterator</a></code> <code class="computeroutput"><span class="identifier">qbegin</span></code><code class="computeroutput"><span class="special">(</span></code><code class="computeroutput"><span class="identifier">Predicates</span> <span class="keyword">const</span> <span class="special">&</span></code> <code class="computeroutput"><span class="identifier">predicates</span></code><code class="computeroutput"><span class="special">)</span></code> |
| </pre> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h2"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.modifier_s_"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.modifier_s_">Modifier(s)</a> |
| </h6> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="keyword">const</span></pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h3"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.parameter_s_"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.parameter_s_">Parameter(s)</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Type |
| </p> |
| </th> |
| <th> |
| <p> |
| Name |
| </p> |
| </th> |
| <th> |
| <p> |
| Description |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">Predicates</span> <span class="keyword">const</span> <span class="special">&</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">predicates</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Predicates. |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h4"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.returns"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.returns">Returns</a> |
| </h6> |
| <p> |
| The iterator pointing at the begin of the query range. |
| </p> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h5"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.example"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.example">Example</a> |
| </h6> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="keyword">for</span> <span class="special">(</span> <span class="identifier">Rtree</span><span class="special">::</span><span class="identifier">const_query_iterator</span> <span class="identifier">it</span> <span class="special">=</span> <span class="identifier">tree</span><span class="special">.</span><span class="identifier">qbegin</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">nearest</span><span class="special">(</span><span class="identifier">pt</span><span class="special">,</span> <span class="number">10000</span><span class="special">))</span> <span class="special">;</span> |
| <span class="identifier">it</span> <span class="special">!=</span> <span class="identifier">tree</span><span class="special">.</span><span class="identifier">qend</span><span class="special">()</span> <span class="special">;</span> <span class="special">++</span><span class="identifier">it</span> <span class="special">)</span> |
| <span class="special">{</span> |
| <span class="comment">// do something with value</span> |
| <span class="keyword">if</span> <span class="special">(</span> <span class="identifier">has_enough_nearest_values</span><span class="special">()</span> <span class="special">)</span> |
| <span class="keyword">break</span><span class="special">;</span> |
| <span class="special">}</span> |
| </pre> |
| <p> |
| </p> |
| <h6> |
| <a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.h6"></a> |
| <span class="phrase"><a name="geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.throws"></a></span><a class="link" href="qbegin_predicates_const___.html#geometry.reference.spatial_indexes.boost__geometry__index__rtree.qbegin_predicates_const___.throws">Throws</a> |
| </h6> |
| <p> |
| If predicates copy throws. If allocation throws. |
| </p> |
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