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<div class="title">RandomAccessNDLocatorConcept&lt; Loc &gt; Struct Template Reference<div class="ingroups"><a class="el" href="group___pixel_locator.html">Pixel Locator</a> &raquo; <a class="el" href="group___pixel_locator_concept.html">Concepts</a> &raquo; <a class="el" href="group___locator_n_d_concept.html">RandomAccessNDLocatorConcept</a></div></div>  </div>
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<p>N-dimensional locator over immutable values.  
 <a href="structboost_1_1gil_1_1_random_access_n_d_locator_concept.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="pixel__locator_8hpp_source.html">pixel_locator.hpp</a>&gt;</code></p>
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void&#160;</td><td class="memItemRight" valign="bottom"><b>constraints</b> ()</td></tr>
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Loc&#160;</td><td class="memItemRight" valign="bottom"><b>loc</b></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename Loc&gt;<br />
struct boost::gil::RandomAccessNDLocatorConcept&lt; Loc &gt;</h3>

<p>N-dimensional locator over immutable values. </p>
<div class="fragment"><div class="line">concept RandomAccessNDLocatorConcept&lt;Regular Loc&gt;</div><div class="line">{</div><div class="line">    <span class="keyword">typename</span> value_type;        <span class="comment">// value over which the locator navigates</span></div><div class="line">    <span class="keyword">typename</span> reference;         <span class="comment">// result of dereferencing</span></div><div class="line">    <span class="keyword">typename</span> difference_type; where PointNDConcept&lt;difference_type&gt;; <span class="comment">// return value of operator-.</span></div><div class="line">    <span class="keyword">typename</span> const_t;           <span class="comment">// same as Loc, but operating over immutable values</span></div><div class="line">    <span class="keyword">typename</span> cached_location_t; <span class="comment">// type to store relative location (for efficient repeated access)</span></div><div class="line">    <span class="keyword">typename</span> point_t  = difference_type;</div><div class="line"></div><div class="line">    <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> num_dimensions; <span class="comment">// dimensionality of the locator</span></div><div class="line">    where num_dimensions = point_t::num_dimensions;</div><div class="line"></div><div class="line">    <span class="comment">// The difference_type and iterator type along each dimension. The iterators may only differ in</span></div><div class="line">    <span class="comment">// difference_type. Their value_type must be the same as Loc::value_type</span></div><div class="line">    <span class="keyword">template</span> &lt;<span class="keywordtype">size_t</span> D&gt;</div><div class="line">    <span class="keyword">struct </span>axis</div><div class="line">    {</div><div class="line">        <span class="keyword">typename</span> coord_t = point_t::axis&lt;D&gt;::coord_t;</div><div class="line">        <span class="keyword">typename</span> iterator; where RandomAccessTraversalConcept&lt;iterator&gt;; <span class="comment">// iterator along D-th axis.</span></div><div class="line">        where iterator::value_type == value_type;</div><div class="line">    };</div><div class="line"></div><div class="line">    <span class="comment">// Defines the type of a locator similar to this type, except it invokes Deref upon dereferencing</span></div><div class="line">    <span class="keyword">template</span> &lt;PixelDereferenceAdaptorConcept Deref&gt;</div><div class="line">    <span class="keyword">struct </span>add_deref</div><div class="line">    {</div><div class="line">        <span class="keyword">typename</span> type;</div><div class="line">            where RandomAccessNDLocatorConcept&lt;type&gt;;</div><div class="line">        <span class="keyword">static</span> type make(<span class="keyword">const</span> Loc&amp; loc, <span class="keyword">const</span> Deref&amp; deref);</div><div class="line">    };</div><div class="line"></div><div class="line">    Loc&amp; operator+=(Loc&amp;, <span class="keyword">const</span> difference_type&amp;);</div><div class="line">    Loc&amp; operator-=(Loc&amp;, <span class="keyword">const</span> difference_type&amp;);</div><div class="line">    Loc operator+(<span class="keyword">const</span> Loc&amp;, <span class="keyword">const</span> difference_type&amp;);</div><div class="line">    Loc operator-(<span class="keyword">const</span> Loc&amp;, <span class="keyword">const</span> difference_type&amp;);</div><div class="line"></div><div class="line">    reference operator*(<span class="keyword">const</span> Loc&amp;);</div><div class="line">    reference operator[](<span class="keyword">const</span> Loc&amp;, <span class="keyword">const</span> difference_type&amp;);</div><div class="line"></div><div class="line">    <span class="comment">// Storing relative location for faster repeated access and accessing it</span></div><div class="line">    cached_location_t Loc::cache_location(<span class="keyword">const</span> difference_type&amp;) <span class="keyword">const</span>;</div><div class="line">    reference operator[](<span class="keyword">const</span> Loc&amp;,<span class="keyword">const</span> cached_location_t&amp;);</div><div class="line"></div><div class="line">    <span class="comment">// Accessing iterators along a given dimension at the current location or at a given offset</span></div><div class="line">    <span class="keyword">template</span> &lt;<span class="keywordtype">size_t</span> D&gt; axis&lt;D&gt;::iterator&amp;       Loc::axis_iterator();</div><div class="line">    <span class="keyword">template</span> &lt;<span class="keywordtype">size_t</span> D&gt; axis&lt;D&gt;::iterator <span class="keyword">const</span>&amp; Loc::axis_iterator() <span class="keyword">const</span>;</div><div class="line">    <span class="keyword">template</span> &lt;<span class="keywordtype">size_t</span> D&gt; axis&lt;D&gt;::iterator        Loc::axis_iterator(<span class="keyword">const</span> difference_type&amp;) <span class="keyword">const</span>;</div><div class="line">};</div></div><!-- fragment --> </div><hr/>The documentation for this struct was generated from the following file:<ul>
<li><a class="el" href="pixel__locator_8hpp_source.html">pixel_locator.hpp</a></li>
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