ceph/src/boost/libs/gil/doc/html/g_i_l_0244.html

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  41 <h1>pixel_iterator_adaptor.hpp</h1><a href="g_i_l_0245.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
  42 <a name="l00002"></a>00002 <span class="comment">    Copyright 2005-2007 Adobe Systems Incorporated</span>
  43 <a name="l00003"></a>00003 <span class="comment">   </span>
  44 <a name="l00004"></a>00004 <span class="comment">    Use, modification and distribution are subject to the Boost Software License,</span>
  45 <a name="l00005"></a>00005 <span class="comment">    Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
  46 <a name="l00006"></a>00006 <span class="comment">    http://www.boost.org/LICENSE_1_0.txt).</span>
  47 <a name="l00007"></a>00007 <span class="comment"></span>
  48 <a name="l00008"></a>00008 <span class="comment">    See http://opensource.adobe.com/gil for most recent version including documentation.</span>
  49 <a name="l00009"></a>00009 <span class="comment">*/</span>
  50 <a name="l00010"></a>00010
  51 <a name="l00011"></a>00011 <span class="comment">/*************************************************************************************************/</span>
  52 <a name="l00012"></a>00012
  53 <a name="l00013"></a>00013 <span class="preprocessor">#ifndef GIL_PIXEL_ITERATOR_ADAPTOR_H</span>
  54 <a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_PIXEL_ITERATOR_ADAPTOR_H</span>
  55 <a name="l00015"></a>00015 <span class="preprocessor"></span>
  56 <a name="l00024"></a>00024
  57 <a name="l00025"></a>00025 <span class="preprocessor">#include &lt;iterator&gt;</span>
  58 <a name="l00026"></a>00026 <span class="preprocessor">#include &lt;boost/iterator/iterator_facade.hpp&gt;</span>
  59 <a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="g_i_l_0094.html" title="GIL configuration file.">gil_config.hpp</a>"</span>
  60 <a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="g_i_l_0092.html" title="Concept check classes for GIL concepts.">gil_concept.hpp</a>"</span>
  61 <a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="g_i_l_0243.html" title="pixel iterator support">pixel_iterator.hpp</a>"</span>
  62 <a name="l00030"></a>00030
  63 <a name="l00031"></a>00031 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
  64 <a name="l00032"></a>00032
  65 <a name="l00033"></a>00033
  66 <a name="l00037"></a>00037
  67 <a name="l00038"></a>00038
  68 <a name="l00041"></a>00041
  69 <a name="l00042"></a>00042 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator,    <span class="comment">// Models Iterator</span>
  70 <a name="l00043"></a>00043           <span class="keyword">typename</span> DFn&gt;  <span class="comment">// Models Returns the result of dereferencing a given iterator of type Iterator</span>
  71 <a name="l00044"></a><a class="code" href="g_i_l_0026.html">00044</a> <span class="keyword">class </span><a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a> : <span class="keyword">public</span> iterator_adaptor&lt;dereference_iterator_adaptor&lt;Iterator,DFn&gt;,
  72 <a name="l00045"></a>00045                                                              Iterator,
  73 <a name="l00046"></a>00046                                                              typename DFn::value_type,
  74 <a name="l00047"></a>00047                                                              use_default,
  75 <a name="l00048"></a>00048                                                              typename DFn::reference,
  76 <a name="l00049"></a>00049                                                              use_default&gt; {
  77 <a name="l00050"></a>00050     DFn _deref_fn;
  78 <a name="l00051"></a>00051 <span class="keyword">public</span>:
  79 <a name="l00052"></a>00052     <span class="keyword">typedef</span> iterator_adaptor&lt;dereference_iterator_adaptor&lt;Iterator,DFn&gt;,
  80 <a name="l00053"></a>00053                                     Iterator,
  81 <a name="l00054"></a>00054                                     <span class="keyword">typename</span> DFn::value_type,
  82 <a name="l00055"></a>00055                                     use_default,
  83 <a name="l00056"></a>00056                                     <span class="keyword">typename</span> DFn::reference,
  84 <a name="l00057"></a>00057                                     use_default&gt; parent_t;
  85 <a name="l00058"></a>00058     <span class="keyword">typedef</span> <span class="keyword">typename</span> DFn::result_type                         reference;
  86 <a name="l00059"></a>00059     <span class="keyword">typedef</span> <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type difference_type;
  87 <a name="l00060"></a>00060     <span class="keyword">typedef</span> DFn                                               dereference_fn;
  88 <a name="l00061"></a>00061
  89 <a name="l00062"></a>00062     <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>() {}
  90 <a name="l00063"></a>00063     <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator1&gt;
  91 <a name="l00064"></a>00064     <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor&lt;Iterator1,DFn&gt;</a>&amp; dit) : parent_t(dit.<a class="code" href="g_i_l_0026.html#048bfb0fc9c6a14faae4c65e841ee2d8">base</a>()), _deref_fn(dit.<a class="code" href="g_i_l_0026.html#65db3d425bf502578a4c0ee37ab5b901">_deref_fn</a>) {}
  92 <a name="l00065"></a>00065     <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>(Iterator it, DFn deref_fn=DFn()) : parent_t(it), _deref_fn(deref_fn) {}
  93 <a name="l00066"></a>00066     <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator1, <span class="keyword">typename</span> DFn1&gt;
  94 <a name="l00067"></a>00067     <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor&lt;Iterator1,DFn1&gt;</a>&amp; it) : parent_t(it.<a class="code" href="g_i_l_0026.html#048bfb0fc9c6a14faae4c65e841ee2d8">base</a>()), _deref_fn(it.<a class="code" href="g_i_l_0026.html#65db3d425bf502578a4c0ee37ab5b901">_deref_fn</a>) {}
  95 <a name="l00070"></a><a class="code" href="g_i_l_0026.html#de1279c4ed222b6efb0867c038765ea1">00070</a>     reference <a class="code" href="g_i_l_0026.html#de1279c4ed222b6efb0867c038765ea1">operator[]</a>(difference_type d)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *(*<span class="keyword">this</span>+d);}
  96 <a name="l00071"></a>00071
  97 <a name="l00072"></a>00072     <span class="comment">// although iterator_adaptor defines these, the default implementation computes distance and compares for zero.</span>
  98 <a name="l00073"></a>00073     <span class="comment">// it is often faster to just apply the relation operator to the base</span>
  99 <a name="l00074"></a>00074     <span class="keywordtype">bool</span>    operator&gt; (<span class="keyword">const</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()&gt; p.base_reference(); }
 100 <a name="l00075"></a>00075     <span class="keywordtype">bool</span>    operator&lt; (<span class="keyword">const</span> dereference_iterator_adaptor&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()&lt; p.base_reference(); }
 101 <a name="l00076"></a>00076     <span class="keywordtype">bool</span>    operator&gt;=(<span class="keyword">const</span> dereference_iterator_adaptor&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()&gt;=p.base_reference(); }
 102 <a name="l00077"></a>00077     <span class="keywordtype">bool</span>    operator&lt;=(<span class="keyword">const</span> dereference_iterator_adaptor&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()&lt;=p.base_reference(); }
 103 <a name="l00078"></a>00078     <span class="keywordtype">bool</span>    operator==(<span class="keyword">const</span> dereference_iterator_adaptor&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()==p.base_reference(); }
 104 <a name="l00079"></a>00079     <span class="keywordtype">bool</span>    operator!=(<span class="keyword">const</span> dereference_iterator_adaptor&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;base_reference()!=p.base_reference(); }
 105 <a name="l00080"></a>00080
 106 <a name="l00081"></a>00081     Iterator&amp; base()              { <span class="keywordflow">return</span> this-&gt;base_reference(); }
 107 <a name="l00082"></a>00082     <span class="keyword">const</span> Iterator&amp; base()<span class="keyword"> const  </span>{ <span class="keywordflow">return</span> this-&gt;base_reference(); }
 108 <a name="l00083"></a>00083     <span class="keyword">const</span> DFn&amp; deref_fn()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _deref_fn; }
 109 <a name="l00084"></a>00084 <span class="keyword">private</span>:
 110 <a name="l00085"></a>00085     <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator1, <span class="keyword">typename</span> DFn1&gt;
 111 <a name="l00086"></a>00086     <span class="keyword">friend</span> <span class="keyword">class </span>dereference_iterator_adaptor;
 112 <a name="l00087"></a>00087     <span class="keyword">friend</span> <span class="keyword">class </span>boost::iterator_core_access;
 113 <a name="l00088"></a>00088
 114 <a name="l00089"></a>00089     reference dereference()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _deref_fn(*(this-&gt;base_reference())); }
 115 <a name="l00090"></a>00090 };
 116 <a name="l00091"></a>00091
 117 <a name="l00092"></a>00092 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 118 <a name="l00093"></a>00093 <span class="keyword">struct </span>const_iterator_type&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; {
 119 <a name="l00094"></a>00094     <span class="keyword">typedef</span> dereference_iterator_adaptor&lt;typename const_iterator_type&lt;I&gt;::type,<span class="keyword">typename</span> DFn::const_t&gt; type;
 120 <a name="l00095"></a>00095 };
 121 <a name="l00096"></a>00096
 122 <a name="l00097"></a>00097 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 123 <a name="l00098"></a>00098 <span class="keyword">struct </span>iterator_is_mutable&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> mpl::bool_&lt;DFn::is_mutable&gt; {};
 124 <a name="l00099"></a>00099
 125 <a name="l00100"></a>00100
 126 <a name="l00101"></a>00101 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 127 <a name="l00102"></a>00102 <span class="keyword">struct </span>is_iterator_adaptor&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> mpl::true_{};
 128 <a name="l00103"></a>00103
 129 <a name="l00104"></a>00104 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 130 <a name="l00105"></a>00105 <span class="keyword">struct </span>iterator_adaptor_get_base&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; {
 131 <a name="l00106"></a>00106     <span class="keyword">typedef</span> I type;
 132 <a name="l00107"></a>00107 };
 133 <a name="l00108"></a>00108
 134 <a name="l00109"></a>00109 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn, <span class="keyword">typename</span> NewBaseIterator&gt;
 135 <a name="l00110"></a>00110 <span class="keyword">struct </span>iterator_adaptor_rebind&lt;dereference_iterator_adaptor&lt;I,DFn&gt;,NewBaseIterator&gt; {
 136 <a name="l00111"></a>00111     <span class="keyword">typedef</span> dereference_iterator_adaptor&lt;NewBaseIterator,DFn&gt; type;
 137 <a name="l00112"></a>00112 };
 138 <a name="l00113"></a>00113
 139 <a name="l00115"></a>00115 <span class="comment">//  PixelBasedConcept</span>
 140 <a name="l00117"></a>00117 <span class="comment"></span>
 141 <a name="l00118"></a>00118 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 142 <a name="l00119"></a>00119 <span class="keyword">struct </span>color_space_type&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> color_space_type&lt;typename DFn::value_type&gt; {};
 143 <a name="l00120"></a>00120
 144 <a name="l00121"></a>00121 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 145 <a name="l00122"></a>00122 <span class="keyword">struct </span>channel_mapping_type&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> channel_mapping_type&lt;typename DFn::value_type&gt; {};
 146 <a name="l00123"></a>00123
 147 <a name="l00124"></a>00124 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 148 <a name="l00125"></a>00125 <span class="keyword">struct </span>is_planar&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> is_planar&lt;typename DFn::value_type&gt; {};
 149 <a name="l00126"></a>00126
 150 <a name="l00127"></a>00127 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> I, <span class="keyword">typename</span> DFn&gt;
 151 <a name="l00128"></a>00128 <span class="keyword">struct </span>channel_type&lt;dereference_iterator_adaptor&lt;I,DFn&gt; &gt; : <span class="keyword">public</span> channel_type&lt;typename DFn::value_type&gt; {};
 152 <a name="l00129"></a>00129
 153 <a name="l00130"></a>00130
 154 <a name="l00132"></a>00132 <span class="comment">//  MemoryBasedIteratorConcept</span>
 155 <a name="l00134"></a>00134 <span class="comment"></span>
 156 <a name="l00135"></a>00135 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 157 <a name="l00136"></a>00136 <span class="keyword">struct </span>byte_to_memunit&lt;dereference_iterator_adaptor&lt;Iterator,DFn&gt; &gt; : <span class="keyword">public</span> byte_to_memunit&lt;Iterator&gt; {};
 158 <a name="l00137"></a>00137
 159 <a name="l00138"></a>00138 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 160 <a name="l00139"></a>00139 <span class="keyword">inline</span> <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type
 161 <a name="l00140"></a>00140 memunit_step(<span class="keyword">const</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p) {
 162 <a name="l00141"></a>00141     <span class="keywordflow">return</span> memunit_step(p.base());
 163 <a name="l00142"></a>00142 }
 164 <a name="l00143"></a>00143
 165 <a name="l00144"></a>00144 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 166 <a name="l00145"></a>00145 <span class="keyword">inline</span> <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type
 167 <a name="l00146"></a>00146 memunit_distance(<span class="keyword">const</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p1,
 168 <a name="l00147"></a>00147               <span class="keyword">const</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p2) {
 169 <a name="l00148"></a>00148     <span class="keywordflow">return</span> memunit_distance(p1.base(),p2.base());
 170 <a name="l00149"></a>00149 }
 171 <a name="l00150"></a>00150
 172 <a name="l00151"></a>00151 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 173 <a name="l00152"></a>00152 <span class="keyword">inline</span> <span class="keywordtype">void</span> memunit_advance(dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p,
 174 <a name="l00153"></a>00153                          <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type diff) {
 175 <a name="l00154"></a>00154     memunit_advance(p.base(), diff);
 176 <a name="l00155"></a>00155 }
 177 <a name="l00156"></a>00156
 178 <a name="l00157"></a>00157 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 179 <a name="l00158"></a>00158 <span class="keyword">inline</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;
 180 <a name="l00159"></a>00159 memunit_advanced(<span class="keyword">const</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p,
 181 <a name="l00160"></a>00160               <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type diff) {
 182 <a name="l00161"></a>00161     <span class="keywordflow">return</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;(memunit_advanced(p.base(), diff), p.deref_fn());
 183 <a name="l00162"></a>00162 }
 184 <a name="l00163"></a>00163
 185 <a name="l00164"></a>00164
 186 <a name="l00165"></a>00165 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 187 <a name="l00166"></a>00166 <span class="keyword">inline</span>
 188 <a name="l00167"></a>00167 <span class="keyword">typename</span> std::iterator_traits&lt;dereference_iterator_adaptor&lt;Iterator,DFn&gt; &gt;::reference
 189 <a name="l00168"></a>00168 memunit_advanced_ref(<span class="keyword">const</span> dereference_iterator_adaptor&lt;Iterator,DFn&gt;&amp; p,
 190 <a name="l00169"></a>00169                   <span class="keyword">typename</span> std::iterator_traits&lt;Iterator&gt;::difference_type diff) {
 191 <a name="l00170"></a>00170     <span class="keywordflow">return</span> *memunit_advanced(p, diff);
 192 <a name="l00171"></a>00171 }
 193 <a name="l00172"></a>00172
 194 <a name="l00174"></a>00174 <span class="comment">//  HasDynamicXStepTypeConcept</span>
 195 <a name="l00176"></a>00176 <span class="comment"></span>
 196 <a name="l00177"></a>00177 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> DFn&gt;
 197 <a name="l00178"></a>00178 <span class="keyword">struct </span>dynamic_x_step_type&lt;dereference_iterator_adaptor&lt;Iterator,DFn&gt; &gt; {
 198 <a name="l00179"></a>00179     <span class="keyword">typedef</span> dereference_iterator_adaptor&lt;typename dynamic_x_step_type&lt;Iterator&gt;::type,DFn&gt; type;
 199 <a name="l00180"></a>00180 };
 200 <a name="l00181"></a>00181
 201 <a name="l00184"></a>00184 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> Deref&gt;
 202 <a name="l00185"></a><a class="code" href="g_i_l_0546.html">00185</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0546.html" title="Returns the type (and creates an instance) of an iterator that invokes the given...">iterator_add_deref</a> {
 203 <a name="l00186"></a>00186     GIL_CLASS_REQUIRE(Deref, boost::gil, <a class="code" href="g_i_l_0350.html" title="Represents a unary function object that can be invoked upon dereferencing a pixel...">PixelDereferenceAdaptorConcept</a>)
 204 <a name="l00187"></a>00187
 205 <a name="l00188"></a>00188     <span class="keyword">typedef</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor&lt;Iterator, Deref&gt;</a> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a>;
 206 <a name="l00189"></a>00189
 207 <a name="l00190"></a>00190     <span class="keyword">static</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a> make(<span class="keyword">const</span> Iterator&amp; it, <span class="keyword">const</span> Deref&amp; d) { <span class="keywordflow">return</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a>(it,d); }
 208 <a name="l00191"></a>00191 };
 209 <a name="l00192"></a>00192
 210 <a name="l00195"></a>00195 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator, <span class="keyword">typename</span> PREV_DEREF, <span class="keyword">typename</span> Deref&gt;
 211 <a name="l00196"></a><a class="code" href="g_i_l_0547.html">00196</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0546.html" title="Returns the type (and creates an instance) of an iterator that invokes the given...">iterator_add_deref</a>&lt;<a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor</a>&lt;Iterator, PREV_DEREF&gt;,Deref&gt; {
 212 <a name="l00197"></a>00197 <span class="comment">//    GIL_CLASS_REQUIRE(Deref, boost::gil, PixelDereferenceAdaptorConcept)</span>
 213 <a name="l00198"></a>00198
 214 <a name="l00199"></a>00199     <span class="keyword">typedef</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor&lt;Iterator, deref_compose&lt;Deref,PREV_DEREF&gt;</a> &gt; <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a>;
 215 <a name="l00200"></a>00200
 216 <a name="l00201"></a>00201     <span class="keyword">static</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a> make(<span class="keyword">const</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">dereference_iterator_adaptor&lt;Iterator, PREV_DEREF&gt;</a>&amp; it, <span class="keyword">const</span> Deref&amp; d) {
 217 <a name="l00202"></a>00202         <span class="keywordflow">return</span> <a class="code" href="g_i_l_0026.html" title="An adaptor over an existing iterator that provides for custom filter on dereferencing...">type</a>(it.<a class="code" href="g_i_l_0026.html#048bfb0fc9c6a14faae4c65e841ee2d8">base</a>(),<a class="code" href="g_i_l_0024.html" title="Composes two dereference function objects. Similar to std::unary_compose but needs...">deref_compose&lt;Deref,PREV_DEREF&gt;</a>(d,it.<a class="code" href="g_i_l_0026.html#53175a49e7ed40f9aa59e89556149573">deref_fn</a>()));
 218 <a name="l00203"></a>00203     }
 219 <a name="l00204"></a>00204 };
 220 <a name="l00205"></a>00205
 221 <a name="l00206"></a>00206 } }  <span class="comment">// namespace boost::gil</span>
 222 <a name="l00207"></a>00207
 223 <a name="l00208"></a>00208 <span class="preprocessor">#endif</span>
 224 </pre></div></div>
 225 <hr size="1"><address style="text-align: right;"><small>Generated on Sat May 2 13:50:14 2009 for Generic Image Library by&nbsp;
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 227 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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