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26<div class="refentry">
27<a name="boost.container.pmr.monotonic_buffer_resource"></a><div class="titlepage"></div>
28<div class="refnamediv">
29<h2><span class="refentrytitle">Class monotonic_buffer_resource</span></h2>
30<p>boost::container::pmr::monotonic_buffer_resource</p>
31</div>
32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
33<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../boost_container_header_reference.html#header.boost.container.pmr.monotonic_buffer_resource_hpp" title="Header &lt;boost/container/pmr/monotonic_buffer_resource.hpp&gt;">boost/container/pmr/monotonic_buffer_resource.hpp</a>&gt;
34
35</span>
36<span class="keyword">class</span> <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> <span class="special">:</span>
37  <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">container</span><span class="special">::</span><span class="identifier">pmr</span><span class="special">::</span><span class="identifier">memory_resource</span>
38<span class="special">{</span>
39<span class="keyword">public</span><span class="special">:</span>
40  <span class="comment">// <a class="link" href="monotonic_buffer_resource.html#boost.container.pmr.monotonic_buffer_resourceconstruct-copy-destruct">construct/copy/destruct</a></span>
41  <span class="keyword">explicit</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212593024-bb"><span class="identifier">monotonic_buffer_resource</span></a><span class="special">(</span><a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
42  <span class="keyword">explicit</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212586000-bb"><span class="identifier">monotonic_buffer_resource</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
43  <a class="link" href="monotonic_buffer_resource.html#idm45641212577232-bb"><span class="identifier">monotonic_buffer_resource</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
44  <a class="link" href="monotonic_buffer_resource.html#idm45641212567472-bb"><span class="identifier">monotonic_buffer_resource</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span>
45  <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a>
46  <a class="link" href="monotonic_buffer_resource.html#idm45641212565760-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span>
47  <a class="link" href="monotonic_buffer_resource.html#idm45641212563616-bb"><span class="special">~</span><span class="identifier">monotonic_buffer_resource</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
48
49  <span class="comment">// <a class="link" href="monotonic_buffer_resource.html#idm45641212613776-bb">public member functions</a></span>
50  <span class="keyword">void</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212613216-bb"><span class="identifier">release</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
51  <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212610064-bb"><span class="identifier">upstream_resource</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
52  <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212607664-bb"><span class="identifier">remaining_storage</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
53  <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212603216-bb"><span class="identifier">remaining_storage</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="special">=</span> <span class="number">1u</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
54  <span class="keyword">const</span> <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212599232-bb"><span class="identifier">current_buffer</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
55  <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212596224-bb"><span class="identifier">next_buffer_size</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
56
57  <span class="comment">// <a class="link" href="monotonic_buffer_resource.html#idm45641212561904-bb">protected member functions</a></span>
58  <span class="keyword">virtual</span> <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212561328-bb"><span class="identifier">do_allocate</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
59  <span class="keyword">virtual</span> <span class="keyword">void</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212549904-bb"><span class="identifier">do_deallocate</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
60  <span class="keyword">virtual</span> <span class="keyword">bool</span> <a class="link" href="monotonic_buffer_resource.html#idm45641212543712-bb"><span class="identifier">do_is_equal</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
61
62  <span class="comment">// <a class="link" href="monotonic_buffer_resource.html#boost.container.pmr.monotonic_buffer_resourcepublic-data-members">public data members</a></span>
63  <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="monotonic_buffer_resource.html#boost.container.pmr.monotonic_buffer_resource.initial_next_buffer_size"><span class="identifier">initial_next_buffer_size</span></a><span class="special">;</span>
64<span class="special">}</span><span class="special">;</span></pre></div>
65<div class="refsect1">
66<a name="id-1.3.10.14.22.3.4"></a><h2>Description</h2>
67<p>A <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> is a special-purpose memory resource intended for very fast memory allocations in situations where memory is used to build up a few objects and then is released all at once when the memory resource object is destroyed. It has the following qualities:</p>
68<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
69<li class="listitem"><p>A call to deallocate has no effect, thus the amount of memory consumed increases monotonically until the resource is destroyed.</p></li>
70<li class="listitem"><p>The program can supply an initial buffer, which the allocator uses to satisfy memory requests.</p></li>
71<li class="listitem"><p>When the initial buffer (if any) is exhausted, it obtains additional buffers from an upstream memory resource supplied at construction. Each additional buffer is larger than the previous one, following a geometric progression.</p></li>
72<li class="listitem"><p>It is intended for access from one thread of control at a time. Specifically, calls to allocate and deallocate do not synchronize with one another.</p></li>
73<li class="listitem"><p>It owns the allocated memory and frees it on destruction, even if deallocate has not been called for some of the allocated blocks. </p></li>
74</ul></div>
75<p>
76</p>
77<div class="refsect2">
78<a name="id-1.3.10.14.22.3.4.4"></a><h3>
79<a name="boost.container.pmr.monotonic_buffer_resourceconstruct-copy-destruct"></a><code class="computeroutput">monotonic_buffer_resource</code>
80        public
81       construct/copy/destruct</h3>
82<div class="orderedlist"><ol class="orderedlist" type="1">
83<li class="listitem">
84<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45641212593024-bb"></a><span class="identifier">monotonic_buffer_resource</span><span class="special">(</span><a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> upstream <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
85<p><span class="bold"><strong>Requires</strong></span>: <code class="computeroutput">upstream</code> shall be the address of a valid memory resource or <code class="computeroutput">nullptr</code></p>
86<p><span class="bold"><strong>Effects</strong></span>: If <code class="computeroutput">upstream</code> is not nullptr, sets the internal resource to <code class="computeroutput">upstream</code>, to get_default_resource() otherwise. Sets the internal <code class="computeroutput">current_buffer</code> to <code class="computeroutput">nullptr</code> and the internal <code class="computeroutput">next_buffer_size</code> to an implementation-defined size. </p>
87</li>
88<li class="listitem">
89<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45641212586000-bb"></a><span class="identifier">monotonic_buffer_resource</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> initial_size<span class="special">,</span>
90                                   <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> upstream <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
91<p><span class="bold"><strong>Requires</strong></span>: <code class="computeroutput">upstream</code> shall be the address of a valid memory resource or <code class="computeroutput">nullptr</code> and <code class="computeroutput">initial_size</code> shall be greater than zero.</p>
92<p><span class="bold"><strong>Effects</strong></span>: If <code class="computeroutput">upstream</code> is not nullptr, sets the internal resource to <code class="computeroutput">upstream</code>, to get_default_resource() otherwise. Sets the internal <code class="computeroutput">current_buffer</code> to <code class="computeroutput">nullptr</code> and <code class="computeroutput">next_buffer_size</code> to at least <code class="computeroutput">initial_size</code>. </p>
93</li>
94<li class="listitem">
95<pre class="literallayout"><a name="idm45641212577232-bb"></a><span class="identifier">monotonic_buffer_resource</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> buffer<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> buffer_size<span class="special">,</span>
96                          <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> upstream <span class="special">=</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
97<p><span class="bold"><strong>Requires</strong></span>: <code class="computeroutput">upstream</code> shall be the address of a valid memory resource or <code class="computeroutput">nullptr</code>, <code class="computeroutput">buffer_size</code> shall be no larger than the number of bytes in buffer.</p>
98<p><span class="bold"><strong>Effects</strong></span>: If <code class="computeroutput">upstream</code> is not nullptr, sets the internal resource to <code class="computeroutput">upstream</code>, to get_default_resource() otherwise. Sets the internal <code class="computeroutput">current_buffer</code> to <code class="computeroutput">buffer</code>, and <code class="computeroutput">next_buffer_size</code> to <code class="computeroutput">buffer_size</code> (but not less than an implementation-defined size), then increases <code class="computeroutput">next_buffer_size</code> by an implementation-defined growth factor (which need not be integral). </p>
99</li>
100<li class="listitem"><pre class="literallayout"><a name="idm45641212567472-bb"></a><span class="identifier">monotonic_buffer_resource</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span></pre></li>
101<li class="listitem"><pre class="literallayout"><a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a>
102<a name="idm45641212565760-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="monotonic_buffer_resource.html" title="Class monotonic_buffer_resource">monotonic_buffer_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span></pre></li>
103<li class="listitem">
104<pre class="literallayout"><a name="idm45641212563616-bb"></a><span class="special">~</span><span class="identifier">monotonic_buffer_resource</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
105<p><span class="bold"><strong>Effects</strong></span>: Calls <code class="computeroutput">this-&gt;release()</code>. </p>
106</li>
107</ol></div>
108</div>
109<div class="refsect2">
110<a name="id-1.3.10.14.22.3.4.5"></a><h3>
111<a name="idm45641212613776-bb"></a><code class="computeroutput">monotonic_buffer_resource</code> public member functions</h3>
112<div class="orderedlist"><ol class="orderedlist" type="1">
113<li class="listitem">
114<pre class="literallayout"><span class="keyword">void</span> <a name="idm45641212613216-bb"></a><span class="identifier">release</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
115<p><span class="bold"><strong>Effects</strong></span>: <code class="computeroutput">upstream_resource()-&gt;deallocate()</code> as necessary to release all allocated memory. [Note: memory is released back to <code class="computeroutput">upstream_resource()</code> even if some blocks that were allocated from this have not been deallocated from this. - end note] </p>
116</li>
117<li class="listitem">
118<pre class="literallayout"><a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">*</span> <a name="idm45641212610064-bb"></a><span class="identifier">upstream_resource</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
119<p><span class="bold"><strong>Returns</strong></span>: The value of the internal resource. </p>
120</li>
121<li class="listitem">
122<pre class="literallayout"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="idm45641212607664-bb"></a><span class="identifier">remaining_storage</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">,</span>
123                              <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="special">&amp;</span> wasted_due_to_alignment<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
124<p><span class="bold"><strong>Returns</strong></span>: The number of bytes of storage available for the specified alignment and the number of bytes wasted due to the requested alignment.</p>
125<p><span class="bold"><strong>Note</strong></span>: Non-standard extension. </p>
126</li>
127<li class="listitem">
128<pre class="literallayout"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="idm45641212603216-bb"></a><span class="identifier">remaining_storage</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment <span class="special">=</span> <span class="number">1u</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
129<p><span class="bold"><strong>Returns</strong></span>: The number of bytes of storage available for the specified alignment.</p>
130<p><span class="bold"><strong>Note</strong></span>: Non-standard extension. </p>
131</li>
132<li class="listitem">
133<pre class="literallayout"><span class="keyword">const</span> <span class="keyword">void</span> <span class="special">*</span> <a name="idm45641212599232-bb"></a><span class="identifier">current_buffer</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
134<p><span class="bold"><strong>Returns</strong></span>: The address pointing to the start of the current free storage.</p>
135<p><span class="bold"><strong>Note</strong></span>: Non-standard extension. </p>
136</li>
137<li class="listitem">
138<pre class="literallayout"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="idm45641212596224-bb"></a><span class="identifier">next_buffer_size</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
139<p><span class="bold"><strong>Returns</strong></span>: The number of bytes that will be requested for the next buffer once the current one is exhausted.</p>
140<p><span class="bold"><strong>Note</strong></span>: Non-standard extension. </p>
141</li>
142</ol></div>
143</div>
144<div class="refsect2">
145<a name="id-1.3.10.14.22.3.4.6"></a><h3>
146<a name="idm45641212561904-bb"></a><code class="computeroutput">monotonic_buffer_resource</code> protected member functions</h3>
147<div class="orderedlist"><ol class="orderedlist" type="1">
148<li class="listitem">
149<pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">void</span> <span class="special">*</span> <a name="idm45641212561328-bb"></a><span class="identifier">do_allocate</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre>
150<p><span class="bold"><strong>Returns</strong></span>: A pointer to allocated storage with a size of at least <code class="computeroutput">bytes</code>. The size and alignment of the allocated memory shall meet the requirements for a class derived from <code class="computeroutput"><code class="computeroutput"><a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a></code></code>.</p>
151<p><span class="bold"><strong>Effects</strong></span>: If the unused space in the internal <code class="computeroutput">current_buffer</code> can fit a block with the specified bytes and alignment, then allocate the return block from the internal <code class="computeroutput">current_buffer</code>; otherwise sets the internal <code class="computeroutput">current_buffer</code> to <code class="computeroutput">upstream_resource()-&gt;allocate(n, m)</code>, where <code class="computeroutput">n</code> is not less than <code class="computeroutput">max(bytes, next_buffer_size)</code> and <code class="computeroutput">m</code> is not less than alignment, and increase <code class="computeroutput">next_buffer_size</code> by an implementation-defined growth factor (which need not be integral), then allocate the return block from the newly-allocated internal <code class="computeroutput">current_buffer</code>.</p>
152<p><span class="bold"><strong>Throws</strong></span>: Nothing unless <code class="computeroutput">upstream_resource()-&gt;allocate()</code> throws. </p>
153</li>
154<li class="listitem">
155<pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">void</span>
156<a name="idm45641212549904-bb"></a><span class="identifier">do_deallocate</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> p<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
157<p><span class="bold"><strong>Effects</strong></span>: None</p>
158<p><span class="bold"><strong>Throws</strong></span>: Nothing</p>
159<p><span class="bold"><strong>Remarks</strong></span>: Memory used by this resource increases monotonically until its destruction. </p>
160</li>
161<li class="listitem">
162<pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">bool</span> <a name="idm45641212543712-bb"></a><span class="identifier">do_is_equal</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">&amp;</span> other<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
163<p><span class="bold"><strong>Returns</strong></span>: <code class="computeroutput">this == dynamic_cast&lt;const monotonic_buffer_resource*&gt;(&amp;other)</code>. </p>
164</li>
165</ol></div>
166</div>
167<div class="refsect2">
168<a name="id-1.3.10.14.22.3.4.7"></a><h3>
169<a name="boost.container.pmr.monotonic_buffer_resourcepublic-data-members"></a><code class="computeroutput">monotonic_buffer_resource</code>
170        public
171       public data members</h3>
172<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
173<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="boost.container.pmr.monotonic_buffer_resource.initial_next_buffer_size"></a><span class="identifier">initial_next_buffer_size</span><span class="special">;</span></pre>
174<p>The number of bytes that will be requested by the default in the first call to the upstream allocator</p>
175<p><span class="bold"><strong>Note</strong></span>: Non-standard extension. </p>
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182<td align="right"><div class="copyright-footer">Copyright © 2009-2018 Ion Gaztanaga<p>
183        Distributed under the Boost Software License, Version 1.0. (See accompanying
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