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- <li class="navelem"><b>boost</b></li><li class="navelem"><b>gil</b></li><li class="navelem"><a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a></li> </ul>
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- <div class="title">position_iterator< Deref, Dim > Struct Template Reference<div class="ingroups"><a class="el" href="group___pixel_iterator.html">Pixel Iterator</a> » <a class="el" href="group___pixel_iterator_model.html">Models</a> » <a class="el" href="group___pixel_iterator_model_virtual.html">position_iterator</a><a class="el" href="group___pixel_based.html">PixelBased</a> » | <a class="el" href="group___pixel_based_model.html">Models</a></div></div> </div>
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- <p>An iterator that remembers its current X,Y position and invokes a function object with it upon dereferencing. Used to create virtual image views. Models: <a class="el" href="structboost_1_1gil_1_1_step_iterator_concept.html" title="Step iterator concept.">StepIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_pixel_iterator_concept.html" title="An STL random access traversal iterator over a model of PixelConcept.">PixelIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_pixel_based_concept.html" title="Concept for all pixel-based GIL constructs.">PixelBasedConcept</a>, <a class="el" href="structboost_1_1gil_1_1_has_dynamic_x_step_type_concept.html" title="Concept for iterators, locators and views that can define a type just like the given iterator,...">HasDynamicXStepTypeConcept</a>.
- <a href="structboost_1_1gil_1_1position__iterator.html#details">More...</a></p>
- <p><code>#include <<a class="el" href="position__iterator_8hpp_source.html">position_iterator.hpp</a>></code></p>
- <p>Inherits iterator_facade< position_iterator< Deref, Dim >, Deref::value_type, std::random_access_iterator_tag, Deref::reference, Deref::argument_type::template axis< Dim >::coord_t >.</p>
- <table class="memberdecls">
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- Public Types</h2></td></tr>
- <tr class="memitem:ad6cdb8c56a1d318e76805577a3905128"><td class="memItemLeft" align="right" valign="top"><a id="ad6cdb8c56a1d318e76805577a3905128"></a>
- using </td><td class="memItemRight" valign="bottom"><b>parent_t</b> = iterator_facade< <a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a>< Deref, Dim >, typename Deref::value_type, std::random_access_iterator_tag, typename Deref::reference, typename Deref::argument_type::template axis< Dim >::coord_t ></td></tr>
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- using </td><td class="memItemRight" valign="bottom"><b>difference_type</b> = typename parent_t::difference_type</td></tr>
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- using </td><td class="memItemRight" valign="bottom"><b>reference</b> = typename parent_t::reference</td></tr>
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- using </td><td class="memItemRight" valign="bottom"><b>point_t</b> = typename Deref::argument_type</td></tr>
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-  </td><td class="memItemRight" valign="bottom"><b>position_iterator</b> (const point_t &p, const point_t &step, const Deref &d)</td></tr>
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-  </td><td class="memItemRight" valign="bottom"><b>position_iterator</b> (const <a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a> &p)</td></tr>
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- template<typename D > </td></tr>
- <tr class="memitem:a3663b908e1443a0f2c28e48276b3948f"><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><b>position_iterator</b> (const <a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a>< D, Dim > &p)</td></tr>
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- <a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a> &p)</td></tr>
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- const point_t & </td><td class="memItemRight" valign="bottom"><b>pos</b> () const</td></tr>
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- const point_t & </td><td class="memItemRight" valign="bottom"><b>step</b> () const</td></tr>
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- const Deref & </td><td class="memItemRight" valign="bottom"><b>deref_fn</b> () const</td></tr>
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- void </td><td class="memItemRight" valign="bottom"><b>set_step</b> (difference_type s)</td></tr>
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- <tr class="memitem:a16d8e6857dd561244ca73764f2b94801"><td class="memItemLeft" align="right" valign="top">reference </td><td class="memItemRight" valign="bottom"><a class="el" href="structboost_1_1gil_1_1position__iterator.html#a16d8e6857dd561244ca73764f2b94801">operator[]</a> (difference_type d) const</td></tr>
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- template<typename DE , int DI> </td></tr>
- <tr class="memitem:a4c7e6e64e2ac787c24c2bc336b135dce"><td class="memTemplItemLeft" align="right" valign="top">struct </td><td class="memTemplItemRight" valign="bottom"><b>position_iterator</b></td></tr>
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- class </td><td class="memItemRight" valign="bottom"><b>boost::iterator_core_access</b></td></tr>
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- <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
- <div class="textblock"><h3>template<typename Deref, int Dim><br />
- struct boost::gil::position_iterator< Deref, Dim ></h3>
- <p>An iterator that remembers its current X,Y position and invokes a function object with it upon dereferencing. Used to create virtual image views. Models: <a class="el" href="structboost_1_1gil_1_1_step_iterator_concept.html" title="Step iterator concept.">StepIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_pixel_iterator_concept.html" title="An STL random access traversal iterator over a model of PixelConcept.">PixelIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_pixel_based_concept.html" title="Concept for all pixel-based GIL constructs.">PixelBasedConcept</a>, <a class="el" href="structboost_1_1gil_1_1_has_dynamic_x_step_type_concept.html" title="Concept for iterators, locators and views that can define a type just like the given iterator,...">HasDynamicXStepTypeConcept</a>. </p>
- <dl class="tparams"><dt>Template Parameters</dt><dd>
- <table class="tparams">
- <tr><td class="paramname">Deref</td><td>A function object that given a point returns a pixel reference. Models <a class="el" href="structboost_1_1gil_1_1_pixel_dereference_adaptor_concept.html" title="Represents a unary function object that can be invoked upon dereferencing a pixel iterator.">PixelDereferenceAdaptorConcept</a> </td></tr>
- <tr><td class="paramname">Dim</td><td>Dimension to advance along </td></tr>
- </table>
- </dd>
- </dl>
- </div><h2 class="groupheader">Member Function Documentation</h2>
- <a id="a16d8e6857dd561244ca73764f2b94801"></a>
- <h2 class="memtitle"><span class="permalink"><a href="#a16d8e6857dd561244ca73764f2b94801">◆ </a></span>operator[]()</h2>
- <div class="memitem">
- <div class="memproto">
- <table class="mlabels">
- <tr>
- <td class="mlabels-left">
- <table class="memname">
- <tr>
- <td class="memname">reference operator[] </td>
- <td>(</td>
- <td class="paramtype">difference_type </td>
- <td class="paramname"><em>d</em></td><td>)</td>
- <td> const</td>
- </tr>
- </table>
- </td>
- <td class="mlabels-right">
- <span class="mlabels"><span class="mlabel">inline</span></span> </td>
- </tr>
- </table>
- </div><div class="memdoc">
- <p>For some reason operator[] provided by iterator_adaptor returns a custom class that is convertible to reference We require our own reference because it is registered in iterator_traits </p>
- </div>
- </div>
- <hr/>The documentation for this struct was generated from the following file:<ul>
- <li><a class="el" href="position__iterator_8hpp_source.html">position_iterator.hpp</a></li>
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