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<li class="navelem"><a class="el" href="dir_120ed4da3e3217b1e7fc0b4f48568e79.html">test</a></li><li class="navelem"><a class="el" href="dir_32f81901cd335bc9b50167e5e69d3c20.html">csf</a></li> </ul>
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<div class="headertitle"><div class="title">src/test/csf/random.h</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">//------------------------------------------------------------------------------</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">/*</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> Copyright (c) 2012-2017 Ripple Labs Inc</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"></span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment"> THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment">*/</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment">//==============================================================================</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#ifndef RIPPLE_TEST_CSF_RANDOM_H_INCLUDED</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#define RIPPLE_TEST_CSF_RANDOM_H_INCLUDED</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/random.html">random</a>&gt;</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a>&gt;</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceripple.html">ripple</a> {</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="keyword">namespace </span>test {</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">namespace </span>csf {</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword">template</span> &lt;<span class="keyword">class</span> T, <span class="keyword">class</span> G&gt;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;T&gt;</a></div>
<div class="foldopen" id="foldopen00041" data-start="{" data-end="}">
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"><a class="line" href="namespaceripple_1_1test_1_1csf.html#a53e40274d593bcb5db96dc73a3b5d9d1"> 41</a></span><a class="code hl_function" href="namespaceripple_1_1test_1_1csf.html#a53e40274d593bcb5db96dc73a3b5d9d1">random_weighted_shuffle</a>(<a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;T&gt;</a> v, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> w, G&amp; g)</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>{</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">using </span><a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a>;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; v.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/size.html">size</a>() - 1; ++i)</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> {</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// pick a random item weighted by w</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/numeric/random/discrete_distribution.html">std::discrete_distribution&lt;&gt;</a> dd(w.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>() + i, w.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>());</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">auto</span> idx = dd(g);</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a>(v[i], v[idx]);</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a>(w[i], w[idx]);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> }</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">return</span> v;</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span>}</div>
</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="keyword">template</span> &lt;<span class="keyword">class</span> RandomNumberDistribution, <span class="keyword">class</span> Generator&gt;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;typename RandomNumberDistribution::result_type&gt;</a></div>
<div class="foldopen" id="foldopen00066" data-start="{" data-end="}">
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"><a class="line" href="namespaceripple_1_1test_1_1csf.html#a797adbe1eb3afd42a66d5d4239e2d19a"> 66</a></span><a class="code hl_function" href="namespaceripple_1_1test_1_1csf.html#a797adbe1eb3afd42a66d5d4239e2d19a">sample</a>(<a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size, RandomNumberDistribution dist, Generator&amp; g)</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span>{</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;typename RandomNumberDistribution::result_type&gt;</a> res(size);</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/generate.html">std::generate</a>(res.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), res.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>(), [&amp;dist, &amp;g]() { return dist(g); });</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">return</span> res;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span>}</div>
</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="keyword">template</span> &lt;<span class="keyword">class</span> RAIter, <span class="keyword">class</span> Generator&gt;</div>
<div class="foldopen" id="foldopen00081" data-start="{" data-end="};">
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html"> 81</a></span><span class="keyword">class </span><a class="code hl_class" href="classripple_1_1test_1_1csf_1_1Selector.html">Selector</a></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span>{</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html#a6b3f311f99cf92966202b58fbe613b52"> 83</a></span> RAIter <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a6b3f311f99cf92966202b58fbe613b52">first_</a>, <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a952b63764ab787c690f802085238692b">last_</a>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html#a401933096fa53a7d1bf4355229065040"> 84</a></span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/numeric/random/discrete_distribution.html">std::discrete_distribution&lt;&gt;</a> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a401933096fa53a7d1bf4355229065040">dd_</a>;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html#a1e713eb6116525962c9280c9c4589979"> 85</a></span> Generator <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a1e713eb6116525962c9280c9c4589979">g_</a>;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span><span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00094" data-start="{" data-end="}">
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html#a032c84bf6fee638c3cdc3854b18dbca5"> 94</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1Selector.html#a032c84bf6fee638c3cdc3854b18dbca5">Selector</a>(</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> RAIter first,</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> RAIter <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/chrono/last_spec.html">last</a>,</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> <span class="keyword">const</span>&amp; w,</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> Generator&amp; g)</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> : <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a6b3f311f99cf92966202b58fbe613b52">first_</a>{first}, <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a952b63764ab787c690f802085238692b">last_</a>{<a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/chrono/last_spec.html">last</a>}, <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a401933096fa53a7d1bf4355229065040">dd_</a>{w.begin(), w.end()}, <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a1e713eb6116525962c9280c9c4589979">g_</a>{g}</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> {</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">using </span>tag = <span class="keyword">typename</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/iterator/iterator_traits.html">std::iterator_traits&lt;RAIter&gt;::iterator_category</a>;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">static_assert</span>(</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same&lt;tag, std::random_access_iterator_tag&gt;::value</a>,</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="stringliteral">&quot;Selector only supports random access iterators.&quot;</span>);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="comment">// TODO: Allow for forward iterators</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> }</div>
</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">typename</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/iterator/iterator_traits.html">std::iterator_traits&lt;RAIter&gt;::value_type</a></div>
<div class="foldopen" id="foldopen00109" data-start="{" data-end="}">
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1Selector.html#a09f31f1e48d8f3fab5cbf892f7c4d989"> 109</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1Selector.html#a09f31f1e48d8f3fab5cbf892f7c4d989">operator()</a>()</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">auto</span> idx = <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a401933096fa53a7d1bf4355229065040">dd_</a>(<a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a1e713eb6116525962c9280c9c4589979">g_</a>);</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="keywordflow">return</span> *(<a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1Selector.html#a6b3f311f99cf92966202b58fbe613b52">first_</a> + idx);</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> }</div>
</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span>};</div>
</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iter, <span class="keyword">typename</span> Generator&gt;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span>Selector&lt;Iter, Generator&gt;</div>
<div class="foldopen" id="foldopen00118" data-start="{" data-end="}">
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"><a class="line" href="namespaceripple_1_1test_1_1csf.html#a40055c883742ff7615144da7c44f66d9"> 118</a></span><a class="code hl_function" href="namespaceripple_1_1test_1_1csf.html#a40055c883742ff7615144da7c44f66d9">makeSelector</a>(Iter first, Iter <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/chrono/last_spec.html">last</a>, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> <span class="keyword">const</span>&amp; w, Generator&amp; g)</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span>{</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1test_1_1csf_1_1Selector.html">Selector&lt;Iter, Generator&gt;</a>(first, <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/chrono/last_spec.html">last</a>, w, g);</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span>}</div>
</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span><span class="comment">//------------------------------------------------------------------------------</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span><span class="comment">// Additional distributions of interest not defined in &lt;random&gt;</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
<div class="foldopen" id="foldopen00128" data-start="{" data-end="};">
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html"> 128</a></span><span class="keyword">class </span><a class="code hl_class" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html">ConstantDistribution</a></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span>{</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a2300ed298952cc710ca15c692c566f3b"> 130</a></span> <span class="keywordtype">double</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a2300ed298952cc710ca15c692c566f3b">t_</a>;</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span><span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00133" data-start="{" data-end="}">
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#aa82f5ac93c33f6af25ad3651e1337138"> 133</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#aa82f5ac93c33f6af25ad3651e1337138">ConstantDistribution</a>(<span class="keywordtype">double</span> <span class="keyword">const</span>&amp; t) : <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a2300ed298952cc710ca15c692c566f3b">t_</a>{t}</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> {</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> }</div>
</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">template</span> &lt;<span class="keyword">class</span> Generator&gt;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <span class="keyword">inline</span> <span class="keywordtype">double</span></div>
<div class="foldopen" id="foldopen00139" data-start="{" data-end="}">
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a5ee51e4ddf1942884c02e2f8e3848546"> 139</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a5ee51e4ddf1942884c02e2f8e3848546">operator()</a>(Generator&amp;)</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> {</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a2300ed298952cc710ca15c692c566f3b">t_</a>;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> }</div>
</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span>};</div>
</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> </div>
<div class="foldopen" id="foldopen00151" data-start="{" data-end="};">
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html"> 151</a></span><span class="keyword">class </span><a class="code hl_class" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html">PowerLawDistribution</a></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span>{</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ae5d0dad195562fa147ba23f698709a30"> 153</a></span> <span class="keywordtype">double</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ae5d0dad195562fa147ba23f698709a30">xmin_</a>;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#aab1c4019f2804456c4b658e9de88ac8c"> 154</a></span> <span class="keywordtype">double</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#aab1c4019f2804456c4b658e9de88ac8c">a_</a>;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#abdc9f98b1ab069b7ce1cb0a10be9a3b3"> 155</a></span> <span class="keywordtype">double</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#abdc9f98b1ab069b7ce1cb0a10be9a3b3">inv_</a>;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ab2b2fc269ee594fea2aea8fa6b578572"> 156</a></span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/numeric/random/uniform_real_distribution.html">std::uniform_real_distribution&lt;double&gt;</a> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ab2b2fc269ee594fea2aea8fa6b578572">uf_</a>{0, 1};</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a21ccb01fd5bf769ad7ece86a67153a64"> 159</a></span> <span class="keyword">using </span><a class="code hl_typedef" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a21ccb01fd5bf769ad7ece86a67153a64">result_type</a> = double;</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="foldopen" id="foldopen00161" data-start="{" data-end="}">
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a3ee51769d7c192356609bfe75eecddf6"> 161</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a3ee51769d7c192356609bfe75eecddf6">PowerLawDistribution</a>(<span class="keywordtype">double</span> xmin, <span class="keywordtype">double</span> a) : <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ae5d0dad195562fa147ba23f698709a30">xmin_</a>{xmin}, <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#aab1c4019f2804456c4b658e9de88ac8c">a_</a>{a}</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> {</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#abdc9f98b1ab069b7ce1cb0a10be9a3b3">inv_</a> = 1.0 / (1.0 - <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#aab1c4019f2804456c4b658e9de88ac8c">a_</a>);</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> }</div>
</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> </div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="keyword">template</span> &lt;<span class="keyword">class</span> Generator&gt;</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keyword">inline</span> <span class="keywordtype">double</span></div>
<div class="foldopen" id="foldopen00168" data-start="{" data-end="}">
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"><a class="line" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a7505ba4d585a30553879cd5ab57491f4"> 168</a></span> <a class="code hl_function" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a7505ba4d585a30553879cd5ab57491f4">operator()</a>(Generator&amp; g)</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> {</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="comment">// use inverse transform of CDF to sample</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <span class="comment">// CDF is P(X &lt;= x): 1 - (x/xmin)^(1-a)</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ae5d0dad195562fa147ba23f698709a30">xmin_</a> * <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/numeric/math/pow.html">std::pow</a>(1 - <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ab2b2fc269ee594fea2aea8fa6b578572">uf_</a>(g), <a class="code hl_variable" href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#abdc9f98b1ab069b7ce1cb0a10be9a3b3">inv_</a>);</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> }</div>
</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span>};</div>
</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span>} <span class="comment">// namespace csf</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span>} <span class="comment">// namespace test</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span>} <span class="comment">// namespace ripple</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> </div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="preprocessor">#endif</span></div>
<div class="ttc" id="abegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/begin.html">std::vector::begin</a></div><div class="ttdeci">T begin(T... args)</div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1ConstantDistribution_html"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html">ripple::test::csf::ConstantDistribution</a></div><div class="ttdoc">Constant &quot;distribution&quot; that always returns the same value.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00128">src/test/csf/random.h:129</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1ConstantDistribution_html_a2300ed298952cc710ca15c692c566f3b"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a2300ed298952cc710ca15c692c566f3b">ripple::test::csf::ConstantDistribution::t_</a></div><div class="ttdeci">double t_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00130">src/test/csf/random.h:130</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1ConstantDistribution_html_a5ee51e4ddf1942884c02e2f8e3848546"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#a5ee51e4ddf1942884c02e2f8e3848546">ripple::test::csf::ConstantDistribution::operator()</a></div><div class="ttdeci">double operator()(Generator &amp;)</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00139">src/test/csf/random.h:139</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1ConstantDistribution_html_aa82f5ac93c33f6af25ad3651e1337138"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1ConstantDistribution.html#aa82f5ac93c33f6af25ad3651e1337138">ripple::test::csf::ConstantDistribution::ConstantDistribution</a></div><div class="ttdeci">ConstantDistribution(double const &amp;t)</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00133">src/test/csf/random.h:133</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html">ripple::test::csf::PowerLawDistribution</a></div><div class="ttdoc">Power-law distribution with PDF.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00151">src/test/csf/random.h:152</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_a21ccb01fd5bf769ad7ece86a67153a64"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a21ccb01fd5bf769ad7ece86a67153a64">ripple::test::csf::PowerLawDistribution::result_type</a></div><div class="ttdeci">double result_type</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00159">src/test/csf/random.h:159</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_a3ee51769d7c192356609bfe75eecddf6"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a3ee51769d7c192356609bfe75eecddf6">ripple::test::csf::PowerLawDistribution::PowerLawDistribution</a></div><div class="ttdeci">PowerLawDistribution(double xmin, double a)</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00161">src/test/csf/random.h:161</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_a7505ba4d585a30553879cd5ab57491f4"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#a7505ba4d585a30553879cd5ab57491f4">ripple::test::csf::PowerLawDistribution::operator()</a></div><div class="ttdeci">double operator()(Generator &amp;g)</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00168">src/test/csf/random.h:168</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_aab1c4019f2804456c4b658e9de88ac8c"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#aab1c4019f2804456c4b658e9de88ac8c">ripple::test::csf::PowerLawDistribution::a_</a></div><div class="ttdeci">double a_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00154">src/test/csf/random.h:154</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_ab2b2fc269ee594fea2aea8fa6b578572"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ab2b2fc269ee594fea2aea8fa6b578572">ripple::test::csf::PowerLawDistribution::uf_</a></div><div class="ttdeci">std::uniform_real_distribution&lt; double &gt; uf_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00156">src/test/csf/random.h:156</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_abdc9f98b1ab069b7ce1cb0a10be9a3b3"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#abdc9f98b1ab069b7ce1cb0a10be9a3b3">ripple::test::csf::PowerLawDistribution::inv_</a></div><div class="ttdeci">double inv_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00155">src/test/csf/random.h:155</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1PowerLawDistribution_html_ae5d0dad195562fa147ba23f698709a30"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1PowerLawDistribution.html#ae5d0dad195562fa147ba23f698709a30">ripple::test::csf::PowerLawDistribution::xmin_</a></div><div class="ttdeci">double xmin_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00153">src/test/csf/random.h:153</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html">ripple::test::csf::Selector</a></div><div class="ttdoc">Invocable that returns random samples from a range according to a discrete distribution.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00081">src/test/csf/random.h:82</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a032c84bf6fee638c3cdc3854b18dbca5"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a032c84bf6fee638c3cdc3854b18dbca5">ripple::test::csf::Selector::Selector</a></div><div class="ttdeci">Selector(RAIter first, RAIter last, std::vector&lt; double &gt; const &amp;w, Generator &amp;g)</div><div class="ttdoc">Constructor.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00094">src/test/csf/random.h:94</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a09f31f1e48d8f3fab5cbf892f7c4d989"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a09f31f1e48d8f3fab5cbf892f7c4d989">ripple::test::csf::Selector::operator()</a></div><div class="ttdeci">std::iterator_traits&lt; RAIter &gt;::value_type operator()()</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00109">src/test/csf/random.h:109</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a1e713eb6116525962c9280c9c4589979"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a1e713eb6116525962c9280c9c4589979">ripple::test::csf::Selector::g_</a></div><div class="ttdeci">Generator g_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00085">src/test/csf/random.h:85</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a401933096fa53a7d1bf4355229065040"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a401933096fa53a7d1bf4355229065040">ripple::test::csf::Selector::dd_</a></div><div class="ttdeci">std::discrete_distribution dd_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00084">src/test/csf/random.h:84</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a6b3f311f99cf92966202b58fbe613b52"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a6b3f311f99cf92966202b58fbe613b52">ripple::test::csf::Selector::first_</a></div><div class="ttdeci">RAIter first_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00083">src/test/csf/random.h:83</a></div></div>
<div class="ttc" id="aclassripple_1_1test_1_1csf_1_1Selector_html_a952b63764ab787c690f802085238692b"><div class="ttname"><a href="classripple_1_1test_1_1csf_1_1Selector.html#a952b63764ab787c690f802085238692b">ripple::test::csf::Selector::last_</a></div><div class="ttdeci">RAIter last_</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00083">src/test/csf/random.h:83</a></div></div>
<div class="ttc" id="adiscrete_distribution_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/discrete_distribution.html">std::discrete_distribution</a></div></div>
<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/end.html">std::vector::end</a></div><div class="ttdeci">T end(T... args)</div></div>
<div class="ttc" id="agenerate_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/generate.html">std::generate</a></div><div class="ttdeci">T generate(T... args)</div></div>
<div class="ttc" id="ais_same_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/is_same.html">std::is_same</a></div></div>
<div class="ttc" id="aiterator_traits_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/iterator_traits.html">std::iterator_traits</a></div></div>
<div class="ttc" id="alast_spec_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/chrono/last_spec.html">std::chrono::last</a></div></div>
<div class="ttc" id="anamespaceripple_1_1test_1_1csf_html_a40055c883742ff7615144da7c44f66d9"><div class="ttname"><a href="namespaceripple_1_1test_1_1csf.html#a40055c883742ff7615144da7c44f66d9">ripple::test::csf::makeSelector</a></div><div class="ttdeci">Selector&lt; Iter, Generator &gt; makeSelector(Iter first, Iter last, std::vector&lt; double &gt; const &amp;w, Generator &amp;g)</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00118">src/test/csf/random.h:118</a></div></div>
<div class="ttc" id="anamespaceripple_1_1test_1_1csf_html_a53e40274d593bcb5db96dc73a3b5d9d1"><div class="ttname"><a href="namespaceripple_1_1test_1_1csf.html#a53e40274d593bcb5db96dc73a3b5d9d1">ripple::test::csf::random_weighted_shuffle</a></div><div class="ttdeci">std::vector&lt; T &gt; random_weighted_shuffle(std::vector&lt; T &gt; v, std::vector&lt; double &gt; w, G &amp;g)</div><div class="ttdoc">Return a randomly shuffled copy of vector based on weights w.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00041">src/test/csf/random.h:41</a></div></div>
<div class="ttc" id="anamespaceripple_1_1test_1_1csf_html_a797adbe1eb3afd42a66d5d4239e2d19a"><div class="ttname"><a href="namespaceripple_1_1test_1_1csf.html#a797adbe1eb3afd42a66d5d4239e2d19a">ripple::test::csf::sample</a></div><div class="ttdeci">std::vector&lt; typename RandomNumberDistribution::result_type &gt; sample(std::size_t size, RandomNumberDistribution dist, Generator &amp;g)</div><div class="ttdoc">Generate a vector of random samples.</div><div class="ttdef"><b>Definition</b> <a href="src_2test_2csf_2random_8h_source.html#l00066">src/test/csf/random.h:66</a></div></div>
<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition</b> <a href="algorithm_8h_source.html#l00025">algorithm.h:25</a></div></div>
<div class="ttc" id="apow_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/math/pow.html">std::pow</a></div><div class="ttdeci">T pow(T... args)</div></div>
<div class="ttc" id="arandom_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/random.html">random</a></div></div>
<div class="ttc" id="asize_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/size.html">std::vector::size</a></div><div class="ttdeci">T size(T... args)</div></div>
<div class="ttc" id="asize_t_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div></div>
<div class="ttc" id="aswap_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a></div><div class="ttdeci">T swap(T... args)</div></div>
<div class="ttc" id="auniform_real_distribution_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/uniform_real_distribution.html">std::uniform_real_distribution</a></div></div>
<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a></div></div>
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