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- <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright 2005-2007 Adobe Systems Incorporated</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#ifndef BOOST_GIL_CONCEPTS_PIXEL_ITERATOR_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define BOOST_GIL_CONCEPTS_PIXEL_ITERATOR_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <boost/gil/concepts/channel.hpp></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <boost/gil/concepts/color.hpp></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/gil/concepts/concept_check.hpp></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <boost/gil/concepts/fwd.hpp></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <boost/gil/concepts/pixel.hpp></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <boost/gil/concepts/pixel_based.hpp></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <boost/iterator/iterator_concepts.hpp></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <iterator></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#if defined(BOOST_CLANG)</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#pragma clang diagnostic push</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#pragma clang diagnostic ignored "-Wunused-local-typedefs"</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#if defined(BOOST_GCC) && (BOOST_GCC >= 40900)</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#pragma GCC diagnostic push</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#pragma GCC diagnostic ignored "-Wunused-local-typedefs"</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// Forward declarations</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">template</span> <<span class="keyword">typename</span> It> <span class="keyword">struct </span>const_iterator_type;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">template</span> <<span class="keyword">typename</span> It> <span class="keyword">struct </span>iterator_is_mutable;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">template</span> <<span class="keyword">typename</span> It> <span class="keyword">struct </span>is_iterator_adaptor;</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">template</span> <<span class="keyword">typename</span> It, <span class="keyword">typename</span> NewBaseIt> <span class="keyword">struct </span>iterator_adaptor_rebind;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">template</span> <<span class="keyword">typename</span> It> <span class="keyword">struct </span>iterator_adaptor_get_base;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// These iterator mutability concepts are taken from Boost concept_check.hpp.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// Isolating mutability to result in faster compile time</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Preconditions: TT Models boost_concepts::ForwardTraversalConcept</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">template</span> <<span class="keyword">class</span> TT></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">struct </span>ForwardIteratorIsMutableConcept</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  {</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">auto</span> <span class="keyword">const</span> tmp = *i;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  *i++ = tmp; <span class="comment">// require postincrement and assignment</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  TT i;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> };</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// Preconditions: TT Models boost::BidirectionalIteratorConcept</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">template</span> <<span class="keyword">class</span> TT></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">struct </span>BidirectionalIteratorIsMutableConcept</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  gil_function_requires< ForwardIteratorIsMutableConcept<TT>>();</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">auto</span> <span class="keyword">const</span> tmp = *i;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  *i-- = tmp; <span class="comment">// require postdecrement and assignment</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  TT i;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</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> <span class="comment">// Preconditions: TT Models boost_concepts::RandomAccessTraversalConcept</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">template</span> <<span class="keyword">class</span> TT></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">struct </span>RandomAccessIteratorIsMutableConcept</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  gil_function_requires<BidirectionalIteratorIsMutableConcept<TT>>();</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">typename</span> std::iterator_traits<TT>::difference_type n = 0;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  ignore_unused_variable_warning(n);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  i[n] = *i; <span class="comment">// require element access and assignment</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  TT i;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> };</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">// Iterators that can be used as the base of memory_based_step_iterator require some additional functions</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">// \tparam Iterator Models boost_concepts::RandomAccessTraversalConcept</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">struct </span>RandomAccessIteratorIsMemoryBasedConcept</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  std::ptrdiff_t bs = memunit_step(it);</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  ignore_unused_variable_warning(bs);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  it = memunit_advanced(it, 3);</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  std::ptrdiff_t bd = memunit_distance(it, it);</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  ignore_unused_variable_warning(bd);</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  memunit_advance(it,3);</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// for performace you may also provide a customized implementation of memunit_advanced_ref</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  Iterator it;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> };</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1_pixel_iterator_is_mutable_concept.html"> 109</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1detail_1_1_pixel_iterator_is_mutable_concept.html">PixelIteratorIsMutableConcept</a></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  {</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  gil_function_requires<detail::RandomAccessIteratorIsMutableConcept<Iterator>>();</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">using</span> ref_t = <span class="keyword">typename</span> std::remove_reference</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">typename</span> std::iterator_traits<Iterator>::reference</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  >::type;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">using</span> channel_t = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__type.html">element_type<ref_t>::type</a>;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  gil_function_requires<detail::ChannelIsMutableConcept<channel_t>>();</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> };</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_has_transposed_type_concept.html"> 136</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_has_transposed_type_concept.html">HasTransposedTypeConcept</a></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> transposed_type<T>::type;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  ignore_unused_variable_warning(type{});</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> };</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_pixel_iterator_concept.html"> 169</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_pixel_iterator_concept.html">PixelIteratorConcept</a></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> {</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  gil_function_requires<boost_concepts::RandomAccessTraversalConcept<Iterator>>();</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  gil_function_requires<PixelBasedConcept<Iterator>>();</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">using</span> value_type = <span class="keyword">typename</span> std::iterator_traits<Iterator>::value_type;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  gil_function_requires<PixelValueConcept<value_type>>();</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">using</span> const_t = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1const__iterator__type.html">const_iterator_type<Iterator>::type</a>;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> is_mutable = <a class="code" href="structboost_1_1gil_1_1iterator__is__mutable.html">iterator_is_mutable<Iterator>::value</a>;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  ignore_unused_variable_warning(is_mutable);</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// immutable iterator must be constructible from (possibly mutable) iterator</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  const_t const_it(it);</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  ignore_unused_variable_warning(const_it);</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  check_base(<span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1is__iterator__adaptor.html">is_iterator_adaptor<Iterator>::type</a>());</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordtype">void</span> check_base(std::false_type) {}</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordtype">void</span> check_base(std::true_type)</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">using</span> base_t = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1iterator__adaptor__get__base.html">iterator_adaptor_get_base<Iterator>::type</a>;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  gil_function_requires<PixelIteratorConcept<base_t>>();</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  Iterator it;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> };</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00208"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_mutable_pixel_iterator_concept.html"> 208</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_mutable_pixel_iterator_concept.html">MutablePixelIteratorConcept</a></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> {</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  {</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  gil_function_requires<PixelIteratorConcept<Iterator>>();</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  gil_function_requires<detail::PixelIteratorIsMutableConcept<Iterator>>();</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> };</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00235"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_memory_based_iterator_concept.html"> 235</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_memory_based_iterator_concept.html">MemoryBasedIteratorConcept</a></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> {</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  {</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  gil_function_requires<boost_concepts::RandomAccessTraversalConcept<Iterator>>();</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  gil_function_requires<detail::RandomAccessIteratorIsMemoryBasedConcept<Iterator>>();</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> };</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00256"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_step_iterator_concept.html"> 256</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_step_iterator_concept.html">StepIteratorConcept</a></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> {</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  {</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  gil_function_requires<boost_concepts::ForwardTraversalConcept<Iterator>>();</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  it.set_step(0);</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  Iterator it;</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> };</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00274"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_mutable_step_iterator_concept.html"> 274</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_mutable_step_iterator_concept.html">MutableStepIteratorConcept</a></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> {</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  {</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  gil_function_requires<StepIteratorConcept<Iterator>>();</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  gil_function_requires<detail::ForwardIteratorIsMutableConcept<Iterator>>();</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  }</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> };</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> </div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00316"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_iterator_adaptor_concept.html"> 316</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_iterator_adaptor_concept.html">IteratorAdaptorConcept</a></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> {</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  {</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  gil_function_requires<boost_concepts::ForwardTraversalConcept<Iterator>>();</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> </div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keyword">using</span> base_t = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1iterator__adaptor__get__base.html">iterator_adaptor_get_base<Iterator>::type</a>;</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  gil_function_requires<boost_concepts::ForwardTraversalConcept<base_t>>();</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  static_assert(<a class="code" href="structboost_1_1gil_1_1is__iterator__adaptor.html">is_iterator_adaptor<Iterator>::value</a>, <span class="stringliteral">""</span>);</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">using</span> rebind_t = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1iterator__adaptor__rebind.html">iterator_adaptor_rebind<Iterator, void*>::type</a>;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  base_t base = it.base();</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  ignore_unused_variable_warning(base);</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  }</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  Iterator it;</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> };</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00341"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1_mutable_iterator_adaptor_concept.html"> 341</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1_mutable_iterator_adaptor_concept.html">MutableIteratorAdaptorConcept</a></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> {</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordtype">void</span> constraints()</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  {</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  gil_function_requires<IteratorAdaptorConcept<Iterator>>();</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  gil_function_requires<detail::ForwardIteratorIsMutableConcept<Iterator>>();</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> };</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="preprocessor">#if defined(BOOST_CLANG)</span></div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="preprocessor">#pragma clang diagnostic pop</span></div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="preprocessor">#if defined(BOOST_GCC) && (BOOST_GCC >= 40900)</span></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="preprocessor">#pragma GCC diagnostic pop</span></div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="structboost_1_1gil_1_1is__iterator__adaptor_html"><div class="ttname"><a href="structboost_1_1gil_1_1is__iterator__adaptor.html">boost::gil::is_iterator_adaptor</a></div><div class="ttdoc">metafunction predicate determining whether the given iterator is a plain one or an adaptor over anoth...</div><div class="ttdef"><b>Definition:</b> metafunctions.hpp:34</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_mutable_pixel_iterator_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_mutable_pixel_iterator_concept.html">boost::gil::MutablePixelIteratorConcept</a></div><div class="ttdoc">Pixel iterator that allows for changing its pixel.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:208</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_memory_based_iterator_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_memory_based_iterator_concept.html">boost::gil::MemoryBasedIteratorConcept</a></div><div class="ttdoc">Concept of a random-access iterator that can be advanced in memory units (bytes or bits)</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:235</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1iterator__adaptor__get__base_html"><div class="ttname"><a href="structboost_1_1gil_1_1iterator__adaptor__get__base.html">boost::gil::iterator_adaptor_get_base</a></div><div class="ttdoc">returns the base iterator for a given iterator adaptor. Provide an specialization when introducing ne...</div><div class="ttdef"><b>Definition:</b> metafunctions.hpp:35</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_iterator_adaptor_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_iterator_adaptor_concept.html">boost::gil::IteratorAdaptorConcept</a></div><div class="ttdoc">Iterator adaptor is a forward iterator adapting another forward iterator.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:316</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_mutable_step_iterator_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_mutable_step_iterator_concept.html">boost::gil::MutableStepIteratorConcept</a></div><div class="ttdoc">Step iterator that allows for modifying its current value.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:274</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1element__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1element__type.html">boost::gil::element_type</a></div><div class="ttdoc">Specifies the element type of a homogeneous color base.</div><div class="ttdef"><b>Definition:</b> color_base_algorithm.hpp:221</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_has_transposed_type_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_has_transposed_type_concept.html">boost::gil::HasTransposedTypeConcept</a></div><div class="ttdoc">Concept for locators and views that can define a type just like the given locator or view,...</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:136</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1iterator__adaptor__rebind_html"><div class="ttname"><a href="structboost_1_1gil_1_1iterator__adaptor__rebind.html">boost::gil::iterator_adaptor_rebind</a></div><div class="ttdoc">Changes the base iterator of an iterator adaptor. Provide an specialization when introducing new iter...</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:36</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_mutable_iterator_adaptor_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_mutable_iterator_adaptor_concept.html">boost::gil::MutableIteratorAdaptorConcept</a></div><div class="ttdoc">Iterator adaptor that is mutable.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:341</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1iterator__is__mutable_html"><div class="ttname"><a href="structboost_1_1gil_1_1iterator__is__mutable.html">boost::gil::iterator_is_mutable</a></div><div class="ttdoc">Metafunction predicate returning whether the given iterator allows for changing its values.</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:49</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1detail_1_1_pixel_iterator_is_mutable_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1detail_1_1_pixel_iterator_is_mutable_concept.html">boost::gil::detail::PixelIteratorIsMutableConcept</a></div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:109</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_pixel_iterator_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_pixel_iterator_concept.html">boost::gil::PixelIteratorConcept</a></div><div class="ttdoc">An STL random access traversal iterator over a model of PixelConcept.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:169</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1const__iterator__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1const__iterator__type.html">boost::gil::const_iterator_type</a></div><div class="ttdoc">Returns the type of an iterator just like the input iterator, except operating over immutable values.</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:40</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1_step_iterator_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_step_iterator_concept.html">boost::gil::StepIteratorConcept</a></div><div class="ttdoc">Step iterator concept.</div><div class="ttdef"><b>Definition:</b> concepts/pixel_iterator.hpp:256</div></div>
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