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<a href="a01118.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2005-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the terms</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// of the GNU General Public License as published by the Free Software</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Foundation; either version 3, or (at your option) any later</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// version.</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="comment">// This library is distributed in the hope that it will be useful, but</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</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="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// Permission to use, copy, modify, sell, and distribute this software</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// is hereby granted without fee, provided that the above copyright</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// notice appears in all copies, and that both that copyright notice</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// and this permission notice appear in supporting documentation. None</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// of the above authors, nor IBM Haifa Research Laboratories, make any</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// representation about the suitability of this software for any</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// purpose. It is provided "as is" without express or implied</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// warranty.</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">/**</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * @file list_update_policy.hpp</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * Contains policies for list update containers.</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> */</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#ifndef PB_DS_LU_POLICY_HPP</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#define PB_DS_LU_POLICY_HPP</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="a00656.html">bits/c++config.h</a>></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <<a class="code" href="a00242.html">cstdlib</a>></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <<a class="code" href="a01355.html">ext/pb_ds/detail/list_update_policy/lu_counter_metadata.hpp</a>></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <<a class="code" href="a01124.html">ext/pb_ds/tag_and_trait.hpp</a>></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">namespace </span><a class="code" href="a01593.html">__gnu_pbds</a></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {<span class="comment"></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> /**</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * A list-update policy that unconditionally moves elements to the</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * front of the list. A null type means that each link in a</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * list-based container does not actually need metadata.</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> */</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Alloc = std::allocator<<span class="keywordtype">char</span>> ></div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="a11103.html"> 57</a></span>  <span class="keyword">class </span><a class="code" href="a11103.html">lu_move_to_front_policy</a></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="keyword">public</span>:</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">typedef</span> _Alloc allocator_type;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"></span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> /// Metadata on which this functor operates.</span></div><div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="a11103.html#acfcd460068d88a84f3931c05942fd979"> 63</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <a class="code" href="a11215.html">null_type</a> <a class="code" href="a11103.html#acfcd460068d88a84f3931c05942fd979">metadata_type</a>;</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>  <span class="keyword">private</span>:</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Alloc::template rebind<metadata_type> __rebind_m;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> /// Reference to metadata on which this functor operates.</span></div><div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="a11103.html#abed5686c84f4f62f95894f692a53fedf"> 70</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <span class="keyword">typename</span> __rebind_m::other::reference <a class="code" href="a11103.html#abed5686c84f4f62f95894f692a53fedf">metadata_reference</a>;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"></span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> /// Creates a metadata object.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span> <a class="code" href="a11215.html">metadata_type</a></div><div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="a11103.html#afa1064441fc28b323b7b28176686ef65"> 74</a></span>  <a class="code" href="a11103.html#afa1064441fc28b323b7b28176686ef65">operator()</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> s_metadata; }</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"></span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> /// Decides whether a metadata object should be moved to the front</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> /// of the list.</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="a11103.html#a009f2dea97b29bdffa640258f86b6135"> 80</a></span>  <a class="code" href="a11103.html#a009f2dea97b29bdffa640258f86b6135">operator()</a>(<a class="code" href="a11103.html#abed5686c84f4f62f95894f692a53fedf">metadata_reference</a> r_metadata)<span class="keyword"> const</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> <span class="keyword">true</span>; }</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">static</span> <a class="code" href="a11215.html">null_type</a> s_metadata;</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> <span class="comment"></span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> /**</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> * A list-update policy that moves elements to the front of the</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> * list based on the counter algorithm.</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> */</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Max_Count = 5, <span class="keyword">typename</span> _Alloc = std::allocator<<span class="keywordtype">char</span>> ></div><div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="a11107.html"> 92</a></span>  <span class="keyword">class </span><a class="code" href="a11107.html">lu_counter_policy</a></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  : <span class="keyword">private</span> <a class="code" href="a11775.html">detail::lu_counter_policy_base</a><typename _Alloc::size_type></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  {</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">typedef</span> _Alloc allocator_type;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> allocator_type::size_type size_type;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">enum</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  {<span class="comment"></span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> /// When some element is accessed this number of times, it</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> /// will be moved to the front of the list.</span></div><div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="a11107.html#aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835"> 103</a></span> <span class="comment"></span> <a class="code" href="a11107.html#aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835">max_count</a> = Max_Count</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  };</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"></span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> /// Metadata on which this functor operates.</span></div><div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="a11107.html#aa53180229ff61fd4f105cd893740b12d"> 107</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <a class="code" href="a11779.html">detail::lu_counter_metadata<size_type></a> <a class="code" href="a11107.html#aa53180229ff61fd4f105cd893740b12d">metadata_type</a>;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">typedef</span> <a class="code" href="a11775.html">detail::lu_counter_policy_base<size_type></a> <a class="code" href="a11775.html">base_type</a>;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Alloc::template rebind<metadata_type> __rebind_m;</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>  <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> /// Reference to metadata on which this functor operates.</span></div><div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="a11107.html#a9b1f819009fec959d74668594f98852d"> 115</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <span class="keyword">typename</span> __rebind_m::other::reference <a class="code" href="a11107.html#a9b1f819009fec959d74668594f98852d">metadata_reference</a>;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"></span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> /// Creates a metadata object.</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"></span> <a class="code" href="a11779.html">metadata_type</a></div><div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="a11107.html#aba9450255401d4b96c50bf7c56d4c49a"> 119</a></span>  <a class="code" href="a11107.html#aba9450255401d4b96c50bf7c56d4c49a">operator()</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> base_type::operator()(<a class="code" href="a11107.html#aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835">max_count</a>); }</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"></span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> /// Decides whether a metadata object should be moved to the front</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> /// of the list.</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"></span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="a11107.html#afa66044dd6264f0c6d6f1cfd05c2fe34"> 125</a></span>  <a class="code" href="a11107.html#afa66044dd6264f0c6d6f1cfd05c2fe34">operator()</a>(<a class="code" href="a11107.html#a9b1f819009fec959d74668594f98852d">metadata_reference</a> r_data)<span class="keyword"> const</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> base_type::operator()(r_data, <a class="code" href="a11107.html#aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835">max_count</a>); }</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  };</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> } <span class="comment">// namespace __gnu_pbds</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="a11103_html_afa1064441fc28b323b7b28176686ef65"><div class="ttname"><a href="a11103.html#afa1064441fc28b323b7b28176686ef65">__gnu_pbds::lu_move_to_front_policy::operator()</a></div><div class="ttdeci">metadata_type operator()() const</div><div class="ttdoc">Creates a metadata object.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00074">list_update_policy.hpp:74</a></div></div>
<div class="ttc" id="a00656_html"><div class="ttname"><a href="a00656.html">c++config.h</a></div></div>
<div class="ttc" id="a11107_html_afa66044dd6264f0c6d6f1cfd05c2fe34"><div class="ttname"><a href="a11107.html#afa66044dd6264f0c6d6f1cfd05c2fe34">__gnu_pbds::lu_counter_policy::operator()</a></div><div class="ttdeci">bool operator()(metadata_reference r_data) const</div><div class="ttdoc">Decides whether a metadata object should be moved to the front of the list.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00125">list_update_policy.hpp:125</a></div></div>
<div class="ttc" id="a11775_html"><div class="ttname"><a href="a11775.html">__gnu_pbds::detail::lu_counter_policy_base</a></div><div class="ttdoc">Base class for list-update counter policy.</div><div class="ttdef"><b>Definition:</b> <a href="a01355_source.html#l00046">lu_counter_metadata.hpp:46</a></div></div>
<div class="ttc" id="a00242_html"><div class="ttname"><a href="a00242.html">cstdlib</a></div></div>
<div class="ttc" id="a01124_html"><div class="ttname"><a href="a01124.html">tag_and_trait.hpp</a></div></div>
<div class="ttc" id="a01593_html"><div class="ttname"><a href="a01593.html">__gnu_pbds</a></div><div class="ttdoc">GNU extensions for policy-based data structures for public use.</div><div class="ttdef"><b>Definition:</b> <a href="a01109_source.html#l00051">assoc_container.hpp:51</a></div></div>
<div class="ttc" id="a01355_html"><div class="ttname"><a href="a01355.html">lu_counter_metadata.hpp</a></div></div>
<div class="ttc" id="a11107_html_a9b1f819009fec959d74668594f98852d"><div class="ttname"><a href="a11107.html#a9b1f819009fec959d74668594f98852d">__gnu_pbds::lu_counter_policy::metadata_reference</a></div><div class="ttdeci">__rebind_m::other::reference metadata_reference</div><div class="ttdoc">Reference to metadata on which this functor operates.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00115">list_update_policy.hpp:115</a></div></div>
<div class="ttc" id="a11103_html_abed5686c84f4f62f95894f692a53fedf"><div class="ttname"><a href="a11103.html#abed5686c84f4f62f95894f692a53fedf">__gnu_pbds::lu_move_to_front_policy::metadata_reference</a></div><div class="ttdeci">__rebind_m::other::reference metadata_reference</div><div class="ttdoc">Reference to metadata on which this functor operates.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00070">list_update_policy.hpp:70</a></div></div>
<div class="ttc" id="a11107_html_aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835"><div class="ttname"><a href="a11107.html#aa038f38231a225b4eae4b7a641cae9d0a7c66d09f76b308caa4430f2f04575835">__gnu_pbds::lu_counter_policy::max_count</a></div><div class="ttdoc">When some element is accessed this number of times, it will be moved to the front of the list.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00103">list_update_policy.hpp:103</a></div></div>
<div class="ttc" id="a11103_html_acfcd460068d88a84f3931c05942fd979"><div class="ttname"><a href="a11103.html#acfcd460068d88a84f3931c05942fd979">__gnu_pbds::lu_move_to_front_policy::metadata_type</a></div><div class="ttdeci">null_type metadata_type</div><div class="ttdoc">Metadata on which this functor operates.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00063">list_update_policy.hpp:63</a></div></div>
<div class="ttc" id="a11107_html"><div class="ttname"><a href="a11107.html">__gnu_pbds::lu_counter_policy</a></div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00092">list_update_policy.hpp:92</a></div></div>
<div class="ttc" id="a11103_html_a009f2dea97b29bdffa640258f86b6135"><div class="ttname"><a href="a11103.html#a009f2dea97b29bdffa640258f86b6135">__gnu_pbds::lu_move_to_front_policy::operator()</a></div><div class="ttdeci">bool operator()(metadata_reference r_metadata) const</div><div class="ttdoc">Decides whether a metadata object should be moved to the front of the list.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00080">list_update_policy.hpp:80</a></div></div>
<div class="ttc" id="a11215_html"><div class="ttname"><a href="a11215.html">__gnu_pbds::null_type</a></div><div class="ttdoc">Represents no type, or absence of type, for template tricks.</div><div class="ttdef"><b>Definition:</b> <a href="a01124_source.html#l00210">tag_and_trait.hpp:210</a></div></div>
<div class="ttc" id="a11103_html"><div class="ttname"><a href="a11103.html">__gnu_pbds::lu_move_to_front_policy</a></div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00057">list_update_policy.hpp:57</a></div></div>
<div class="ttc" id="a11107_html_aba9450255401d4b96c50bf7c56d4c49a"><div class="ttname"><a href="a11107.html#aba9450255401d4b96c50bf7c56d4c49a">__gnu_pbds::lu_counter_policy::operator()</a></div><div class="ttdeci">metadata_type operator()() const</div><div class="ttdoc">Creates a metadata object.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00119">list_update_policy.hpp:119</a></div></div>
<div class="ttc" id="a11779_html"><div class="ttname"><a href="a11779.html">__gnu_pbds::detail::lu_counter_metadata</a></div><div class="ttdoc">A list-update metadata type that moves elements to the front of the list based on the counter algorit...</div><div class="ttdef"><b>Definition:</b> <a href="a01355_source.html#l00051">lu_counter_metadata.hpp:51</a></div></div>
<div class="ttc" id="a11107_html_aa53180229ff61fd4f105cd893740b12d"><div class="ttname"><a href="a11107.html#aa53180229ff61fd4f105cd893740b12d">__gnu_pbds::lu_counter_policy::metadata_type</a></div><div class="ttdeci">detail::lu_counter_metadata< size_type > metadata_type</div><div class="ttdoc">Metadata on which this functor operates.</div><div class="ttdef"><b>Definition:</b> <a href="a01118_source.html#l00107">list_update_policy.hpp:107</a></div></div>
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