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<a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree"></a><a class="link" href="specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.html" title="Specializing index::indexable function object - storing shared pointers in the rtree">Specializing
index::indexable function object - storing shared pointers in the rtree</a>
</h4></div></div></div>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">index</span><span class="special">/</span><span class="identifier">rtree</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cmath</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">vector</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">foreach</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">shared_ptr</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
<span class="keyword">namespace</span> <span class="identifier">bg</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">;</span>
<span class="keyword">namespace</span> <span class="identifier">bgi</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">index</span><span class="special">;</span>
<span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">geometry</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">index</span> <span class="special">{</span>
<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Box</span><span class="special">></span>
<span class="keyword">struct</span> <span class="identifier">indexable</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">Box</span><span class="special">></span> <span class="special">></span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">Box</span><span class="special">></span> <span class="identifier">V</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">Box</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">result_type</span><span class="special">;</span>
<span class="identifier">result_type</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">V</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">v</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="special">*</span><span class="identifier">v</span><span class="special">;</span> <span class="special">}</span>
<span class="special">};</span>
<span class="special">}}}</span> <span class="comment">// namespace boost::geometry::index</span>
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
<span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span><span class="special"><</span><span class="keyword">float</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">></span> <span class="identifier">point</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">box</span><span class="special"><</span><span class="identifier">point</span><span class="special">></span> <span class="identifier">box</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">box</span><span class="special">></span> <span class="identifier">shp</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">shp</span> <span class="identifier">value</span><span class="special">;</span>
<span class="comment">// create the rtree using default constructor</span>
<span class="identifier">bgi</span><span class="special">::</span><span class="identifier">rtree</span><span class="special"><</span> <span class="identifier">value</span><span class="special">,</span> <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">linear</span><span class="special"><</span><span class="number">16</span><span class="special">,</span> <span class="number">4</span><span class="special">></span> <span class="special">></span> <span class="identifier">rtree</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"filling index with boxes shared pointers:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="comment">// fill the spatial index</span>
<span class="keyword">for</span> <span class="special">(</span> <span class="keyword">unsigned</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span> <span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="number">10</span> <span class="special">;</span> <span class="special">++</span><span class="identifier">i</span> <span class="special">)</span>
<span class="special">{</span>
<span class="comment">// create a box</span>
<span class="identifier">shp</span> <span class="identifier">b</span><span class="special">(</span><span class="keyword">new</span> <span class="identifier">box</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span><span class="special">+</span><span class="number">0.0f</span><span class="special">,</span> <span class="identifier">i</span><span class="special">+</span><span class="number">0.0f</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span><span class="special">+</span><span class="number">0.5f</span><span class="special">,</span> <span class="identifier">i</span><span class="special">+</span><span class="number">0.5f</span><span class="special">)));</span>
<span class="comment">// display new box</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(*</span><span class="identifier">b</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="comment">// insert new value</span>
<span class="identifier">rtree</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="identifier">b</span><span class="special">);</span>
<span class="special">}</span>
<span class="comment">// find values intersecting some area defined by a box</span>
<span class="identifier">box</span> <span class="identifier">query_box</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">));</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">value</span><span class="special">></span> <span class="identifier">result_s</span><span class="special">;</span>
<span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">intersects</span><span class="special">(</span><span class="identifier">query_box</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_s</span><span class="special">));</span>
<span class="comment">// find 5 nearest values to a point</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="identifier">value</span><span class="special">></span> <span class="identifier">result_n</span><span class="special">;</span>
<span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</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">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="number">5</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_n</span><span class="special">));</span>
<span class="comment">// note: in Boost.Geometry the WKT representation of a box is polygon</span>
<span class="comment">// display results</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"spatial query box:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(</span><span class="identifier">query_box</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"spatial query result:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_s</span><span class="special">)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(*</span><span class="identifier">v</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"knn query point:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">point</span><span class="special">>(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">))</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"knn query result:"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_n</span><span class="special">)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special"><</span><span class="identifier">box</span><span class="special">>(*</span><span class="identifier">v</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
</p>
<h5>
<a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.h0"></a>
<span class="phrase"><a name="geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.expected_results"></a></span><a class="link" href="specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.html#geometry.spatial_indexes.rtree_examples.specializing_index__indexable_function_object___storing_shared_pointers_in_the_rtree.expected_results">Expected
results</a>
</h5>
<pre class="programlisting"><span class="identifier">filling</span> <span class="identifier">index</span> <span class="identifier">with</span> <span class="identifier">boxes</span> <span class="identifier">shared</span> <span class="identifier">pointers</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">6</span> <span class="number">6</span><span class="special">,</span><span class="number">6</span> <span class="number">6.5</span><span class="special">,</span><span class="number">6.5</span> <span class="number">6.5</span><span class="special">,</span><span class="number">6.5</span> <span class="number">6</span><span class="special">,</span><span class="number">6</span> <span class="number">6</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">7</span> <span class="number">7</span><span class="special">,</span><span class="number">7</span> <span class="number">7.5</span><span class="special">,</span><span class="number">7.5</span> <span class="number">7.5</span><span class="special">,</span><span class="number">7.5</span> <span class="number">7</span><span class="special">,</span><span class="number">7</span> <span class="number">7</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">8</span> <span class="number">8</span><span class="special">,</span><span class="number">8</span> <span class="number">8.5</span><span class="special">,</span><span class="number">8.5</span> <span class="number">8.5</span><span class="special">,</span><span class="number">8.5</span> <span class="number">8</span><span class="special">,</span><span class="number">8</span> <span class="number">8</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">9</span> <span class="number">9</span><span class="special">,</span><span class="number">9</span> <span class="number">9.5</span><span class="special">,</span><span class="number">9.5</span> <span class="number">9.5</span><span class="special">,</span><span class="number">9.5</span> <span class="number">9</span><span class="special">,</span><span class="number">9</span> <span class="number">9</span><span class="special">))</span>
<span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">box</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
<span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">))</span>
<span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">point</span><span class="special">:</span>
<span class="identifier">POINT</span><span class="special">(</span><span class="number">0</span> <span class="number">0</span><span class="special">)</span>
<span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span>
</pre>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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