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 <span id="projectnumber">v2.00 late alpha</span>
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<div class="title">llfio_v2_xxx::map_view< T > Class Template Reference</div> </div>
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<p>Provides a lightweight typed view of a <code>map_handle</code>, a <code>mapped_file_handle</code> or a <code>mapped<T></code> suitable for feeding to STL algorithms or the Ranges TS.
<a href="classllfio__v2__xxx_1_1map__view.html#details">More...</a></p>
<p><code>#include "map_view.hpp"</code></p>
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Inheritance diagram for llfio_v2_xxx::map_view< T >:</div>
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<img src="classllfio__v2__xxx_1_1map__view.png" usemap="#llfio_5Fv2_5Fxxx::map_5Fview_3C_20T_20_3E_map" alt=""/>
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Public Types</h2></td></tr>
<tr class="memitem:ada2f632e47980e8261ca9e9d7cea0ad0"><td class="memItemLeft" align="right" valign="top"><a id="ada2f632e47980e8261ca9e9d7cea0ad0"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#ada2f632e47980e8261ca9e9d7cea0ad0">extent_type</a> = typename section_handle::extent_type</td></tr>
<tr class="memdesc:ada2f632e47980e8261ca9e9d7cea0ad0"><td class="mdescLeft"> </td><td class="mdescRight">The extent type. <br /></td></tr>
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<tr class="memitem:a22be05bfdf389ec2fe1e38364a709968"><td class="memItemLeft" align="right" valign="top"><a id="a22be05bfdf389ec2fe1e38364a709968"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> = typename section_handle::size_type</td></tr>
<tr class="memdesc:a22be05bfdf389ec2fe1e38364a709968"><td class="mdescLeft"> </td><td class="mdescRight">The size type. <br /></td></tr>
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Public Member Functions</h2></td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#acc3a035ab192f6debac1cae05303f5b6">map_view</a> ()</td></tr>
<tr class="memdesc:acc3a035ab192f6debac1cae05303f5b6"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <br /></td></tr>
<tr class="separator:acc3a035ab192f6debac1cae05303f5b6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9e2146183c2a23e888f37c2be5fda541"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a9e2146183c2a23e888f37c2be5fda541">map_view</a> (<a class="el" href="classllfio__v2__xxx_1_1mapped.html">mapped</a>< T > &<a class="el" href="namespacellfio__v2__xxx.html#ab50d07405d17a8fff4e360fd2612bc6f">map</a>, <a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> <a class="el" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>=(<a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1, <a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> offset=0)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<class T><br />
class llfio_v2_xxx::map_view< T ></h3>
<p>Provides a lightweight typed view of a <code>map_handle</code>, a <code>mapped_file_handle</code> or a <code>mapped<T></code> suitable for feeding to STL algorithms or the Ranges TS. </p>
<p>This is the correct type to use when passing non-owning views of mapped data around between functions. Where you wish the view to be (possibly) owning, you may find the non-lightweight <code>mapped<T></code> of more use. </p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="a9e2146183c2a23e888f37c2be5fda541"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9e2146183c2a23e888f37c2be5fda541">◆ </a></span>map_view() <span class="overload">[1/3]</span></h2>
<div class="memitem">
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<div class="memtemplate">
template<class T > </div>
<table class="mlabels">
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<tr>
<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1map__view.html">llfio_v2_xxx::map_view</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1map__view.html">map_view</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html">mapped</a>< T > & </td>
<td class="paramname"><em>map</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> </td>
<td class="paramname"><em>length</em> = <code>(<a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> </td>
<td class="paramname"><em>offset</em> = <code>0</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Implicitly construct a mapped view of the given mapped data.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">map</td><td>The mapped data to take a view upon. </td></tr>
<tr><td class="paramname">length</td><td>The number of items to map, use -1 to mean the length of the input view. </td></tr>
<tr><td class="paramname">offset</td><td>The item offset into the mapped file handle. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  : span<T>(<a class="code" href="namespacellfio__v2__xxx.html#ab50d07405d17a8fff4e360fd2612bc6f">map</a>.begin() + offset, (<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == (<a class="code" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1) ? (<a class="code" href="namespacellfio__v2__xxx.html#ab50d07405d17a8fff4e360fd2612bc6f">map</a>.size() - offset) : <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>) <span class="comment">// NOLINT</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div><div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:595</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1map__view_html_a22be05bfdf389ec2fe1e38364a709968"><div class="ttname"><a href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">llfio_v2_xxx::map_view::size_type</a></div><div class="ttdeci">typename section_handle::size_type size_type</div><div class="ttdoc">The size type. </div><div class="ttdef"><b>Definition:</b> map_view.hpp:47</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_html_ab50d07405d17a8fff4e360fd2612bc6f"><div class="ttname"><a href="namespacellfio__v2__xxx.html#ab50d07405d17a8fff4e360fd2612bc6f">llfio_v2_xxx::map</a></div><div class="ttdeci">result< map_handle > map(map_handle::size_type bytes, bool zeroed=false, section_handle::flag _flag=section_handle::flag::readwrite) noexcept</div><div class="ttdef"><b>Definition:</b> map_handle.hpp:650</div></div>
</div><!-- fragment -->
</div>
</div>
<a id="a97c04ba57e872e0aea6ae3bc6b4ff647"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a97c04ba57e872e0aea6ae3bc6b4ff647">◆ </a></span>map_view() <span class="overload">[2/3]</span></h2>
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template<class T > </div>
<table class="mlabels">
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<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1map__view.html">llfio_v2_xxx::map_view</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1map__view.html">map_view</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__handle.html">map_handle</a> & </td>
<td class="paramname"><em>mh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> </td>
<td class="paramname"><em>length</em> = <code>(<a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#ada2f632e47980e8261ca9e9d7cea0ad0">extent_type</a> </td>
<td class="paramname"><em>byteoffset</em> = <code>0</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
</tr>
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</div><div class="memdoc">
<p>Construct a mapped view of the given map handle.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mh</td><td>The map handle to use. </td></tr>
<tr><td class="paramname">length</td><td>The number of items to map, use -1 to mean the length of the map handle divided by <code>sizeof(T)</code>. </td></tr>
<tr><td class="paramname">byteoffset</td><td>The byte offset into the map handle, this does not need to be a multiple of the page size. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  : span<T>(<span class="keyword">reinterpret_cast<</span>T *<span class="keyword">></span>(mh.address() + byteoffset), (<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == (<a class="code" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1) ? ((mh.length() - byteoffset) / <span class="keyword">sizeof</span>(T)) : <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>) <span class="comment">// NOLINT</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div><div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:595</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1map__view_html_a22be05bfdf389ec2fe1e38364a709968"><div class="ttname"><a href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">llfio_v2_xxx::map_view::size_type</a></div><div class="ttdeci">typename section_handle::size_type size_type</div><div class="ttdoc">The size type. </div><div class="ttdef"><b>Definition:</b> map_view.hpp:47</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a8d8ce42d796c179afd1efbb7d65f3198">◆ </a></span>map_view() <span class="overload">[3/3]</span></h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template<class T > </div>
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<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1map__view.html">llfio_v2_xxx::map_view</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1map__view.html">map_view</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped__file__handle.html">mapped_file_handle</a> & </td>
<td class="paramname"><em>mfh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a> </td>
<td class="paramname"><em>length</em> = <code>(<a class="el" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1map__view.html#ada2f632e47980e8261ca9e9d7cea0ad0">extent_type</a> </td>
<td class="paramname"><em>byteoffset</em> = <code>0</code> </td>
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<td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
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<p>Construct a mapped view of the given mapped file handle.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mfh</td><td>The mapped file handle to take a view upon. </td></tr>
<tr><td class="paramname">length</td><td>The number of items to map, use -1 to mean the length of the section handle divided by <code>sizeof(T)</code>. </td></tr>
<tr><td class="paramname">byteoffset</td><td>The byte offset into the mapped file handle, this does not need to be a multiple of the page size. </td></tr>
</table>
</dd>
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<div class="fragment"><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  : span<T>(<span class="keyword">reinterpret_cast<</span>T *<span class="keyword">></span>(mfh.address() + byteoffset), (<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == (<a class="code" href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">size_type</a>) -1) ? ((mfh.maximum_extent().value() - byteoffset) / <span class="keyword">sizeof</span>(T)) : <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>) <span class="comment">// NOLINT</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:595</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1map__view_html_a22be05bfdf389ec2fe1e38364a709968"><div class="ttname"><a href="classllfio__v2__xxx_1_1map__view.html#a22be05bfdf389ec2fe1e38364a709968">llfio_v2_xxx::map_view::size_type</a></div><div class="ttdeci">typename section_handle::size_type size_type</div><div class="ttdoc">The size type. </div><div class="ttdef"><b>Definition:</b> map_view.hpp:47</div></div>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>include/llfio/v2.0/<a class="el" href="map__view_8hpp.html">map_view.hpp</a></li>
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