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<li class="navelem"><a class="el" href="dir_df9c78dcf3f59a33b12284f95992a64b.html">ripple</a></li><li class="navelem"><a class="el" href="dir_b003f5a72efe503c7552f86021e0c4d2.html">overlay</a></li><li class="navelem"><a class="el" href="dir_3d31096116cb07f2d03f31d101bf2478.html">impl</a></li> </ul>
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<div class="title">ProtocolVersion.cpp</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (c) 2019 Ripple Labs Inc.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
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<div class="line"><a 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>
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<div class="line"><a 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>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
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<div class="line"><a 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>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
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<div class="line"><a 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>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">//==============================================================================</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <ripple/beast/core/LexicalCast.h></span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <ripple/beast/rfc2616.h></span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <ripple/overlay/impl/ProtocolVersion.h></span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <boost/function_output_iterator.hpp></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <boost/regex.hpp></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a>></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/functional.html">functional</a>></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// clang-format off</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> constexpr <a class="code" href="namespaceripple.html#a115d5c8fd15fe92c47231fee7fad7c7c">ProtocolVersion</a> <span class="keyword">const</span> <a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>[]</div>
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<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676"> 38</a></span> {</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  {2, 1},</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {2, 2}</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> };</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// clang-format on</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// This ugly construct ensures that supportedProtocolList is sorted in strictly</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// ascending order and doesn't contain any duplicates.</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// FIXME: With C++20 we can use std::is_sorted with an appropriate comparator</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> static_assert(</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  []() constexpr->bool {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  auto const len = std::distance(</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  std::begin(supportedProtocolList), std::end(supportedProtocolList));</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// There should be at least one protocol we're willing to speak.</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  if (len == 0)</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  return false;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// A list with only one entry is, by definition, sorted so we don't</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// need to check it.</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  if (len != 1)</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  {</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  for (auto i = 0; i != len - 1; ++i)</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  {</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  if (supportedProtocolList[i] >= supportedProtocolList[i + 1])</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  return false;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  </div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }(),</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="stringliteral">"The list of supported protocols isn't properly sorted."</span>);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
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<div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="namespaceripple.html#a4f0ccdacfa8449fee76f632565aebab0"> 72</a></span> to_string(<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">ProtocolVersion</a> <span class="keyword">const</span>& p)</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> <span class="stringliteral">"XRPL/"</span> + <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/to_string.html">std::to_string</a>(p.<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">first</a>) + <span class="stringliteral">"."</span> + <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/to_string.html">std::to_string</a>(p.<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">second</a>);</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<ProtocolVersion></a></div>
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<div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="namespaceripple.html#a217d4fd0d78a4f83214976e1b25f31eb"> 78</a></span> <a class="code" href="namespaceripple.html#a217d4fd0d78a4f83214976e1b25f31eb">parseProtocolVersions</a>(boost::beast::string_view <span class="keyword">const</span>& value)</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> {</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">static</span> boost::regex re(</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="stringliteral">"^"</span> <span class="comment">// start of line</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="stringliteral">"XRPL/"</span> <span class="comment">// The string "XRPL/"</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="stringliteral">"([2-9]|(?:[1-9][0-9]+))"</span> <span class="comment">// a number (greater than 2 with no leading</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// zeroes)</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="stringliteral">"\\."</span> <span class="comment">// a period</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="stringliteral">"(0|(?:[1-9][0-9]*))"</span> <span class="comment">// a number (no leading zeroes unless exactly</span></div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// zero)</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="stringliteral">"$"</span> <span class="comment">// The end of the string</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  ,</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  boost::regex_constants::optimize);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<ProtocolVersion></a> result;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>& s : <a class="code" href="namespacebeast_1_1rfc2616.html#a4c2f1ae5d7c29a1b452c4fa1d3751e8e">beast::rfc2616::split_commas</a>(value))</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  {</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  boost::smatch m;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span> (boost::regex_match(s, m, re))</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> major;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a> minor;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacebeast.html#aeb241ed2f4422ea57283956ca58c5d42">beast::lexicalCastChecked</a>(major, <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a>(m[1])))</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacebeast.html#aeb241ed2f4422ea57283956ca58c5d42">beast::lexicalCastChecked</a>(minor, <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a>(m[2])))</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">auto</span> <span class="keyword">const</span> proto = <a class="code" href="namespaceripple.html#a2b609b884aa88582cbc1f946c8640248">make_protocol</a>(major, minor);</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// This is an extra sanity check: we check that the protocol we just</span></div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// decoded corresponds to the token we were parsing.</span></div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (to_string(proto) == s)</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">push_back</a>(<a class="code" href="namespaceripple.html#a2b609b884aa88582cbc1f946c8640248">make_protocol</a>(major, minor));</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  }</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">// We guarantee that the returned list is sorted and contains no duplicates:</span></div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/sort.html">std::sort</a>(result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>());</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/erase.html">erase</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/unique.html">std::unique</a>(result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>()), result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>());</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> }</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional<ProtocolVersion></a></div>
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<div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="namespaceripple.html#a0a6d7ab3fd095a10fd8bd6d140dcd55b"> 125</a></span> <a class="code" href="namespaceripple.html#a0a6d7ab3fd095a10fd8bd6d140dcd55b">negotiateProtocolVersion</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<ProtocolVersion></a> <span class="keyword">const</span>& versions)</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> {</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional<ProtocolVersion></a> result;</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  </div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">// The protocol version we want to negotiate is the largest item in the</span></div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">// intersection of the versions supported by us and the peer. Since the</span></div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// output of std::set_intersection is sorted, that item is always going</span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// to be the last one. So we get a little clever and avoid the need for</span></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// a container:</span></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a><void(<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">ProtocolVersion</a> <span class="keyword">const</span>&)> pickVersion =</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  [&result](<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">ProtocolVersion</a> <span class="keyword">const</span>& v) { result = v; };</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  </div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/set_intersection.html">std::set_intersection</a>(</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(versions),</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(versions),</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(<a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>),</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(<a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>),</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  boost::make_function_output_iterator(pickVersion));</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  </div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional<ProtocolVersion></a></div>
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<div class="line"><a name="l00148"></a><span class="lineno"><a class="line" href="namespaceripple.html#a8eaf7a979b4260f282dded203de6e436"> 148</a></span> <a class="code" href="namespaceripple.html#a0a6d7ab3fd095a10fd8bd6d140dcd55b">negotiateProtocolVersion</a>(boost::beast::string_view <span class="keyword">const</span>& versions)</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> {</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">auto</span> <span class="keyword">const</span> them = <a class="code" href="namespaceripple.html#a217d4fd0d78a4f83214976e1b25f31eb">parseProtocolVersions</a>(versions);</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#a0a6d7ab3fd095a10fd8bd6d140dcd55b">negotiateProtocolVersion</a>(them);</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> }</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span>&</div>
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<div class="line"><a name="l00156"></a><span class="lineno"><a class="line" href="namespaceripple.html#a72ff7246abef14a2be411b9002f81beb"> 156</a></span> <a class="code" href="namespaceripple.html#a72ff7246abef14a2be411b9002f81beb">supportedProtocolVersions</a>()</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> {</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span> supported = []() {</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> ret;</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>& v : <a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>)</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  {</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (!ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>())</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  ret += <span class="stringliteral">", "</span>;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  ret += to_string(v);</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  </div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">return</span> ret;</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  }();</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  </div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> supported;</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> }</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  </div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="keywordtype">bool</span></div>
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<div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="namespaceripple.html#ac5afac59670d5c595215479acb2741bd"> 174</a></span> <a class="code" href="namespaceripple.html#ac5afac59670d5c595215479acb2741bd">isProtocolSupported</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">ProtocolVersion</a> <span class="keyword">const</span>& v)</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> {</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(<a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>) !=</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/find.html">std::find</a>(</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(<a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>),</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(<a class="code" href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">supportedProtocolList</a>),</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  v);</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> }</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  </div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> } <span class="comment">// namespace ripple</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="abasic_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="afunctional_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/functional.html">functional</a></div></div>
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<div class="ttc" id="apair_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a></div></div>
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<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="afind_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/find.html">std::find</a></div><div class="ttdeci">T find(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a2b609b884aa88582cbc1f946c8640248"><div class="ttname"><a href="namespaceripple.html#a2b609b884aa88582cbc1f946c8640248">ripple::make_protocol</a></div><div class="ttdeci">constexpr ProtocolVersion make_protocol(std::uint16_t major, std::uint16_t minor)</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8h_source.html#l00040">ProtocolVersion.h:40</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a217d4fd0d78a4f83214976e1b25f31eb"><div class="ttname"><a href="namespaceripple.html#a217d4fd0d78a4f83214976e1b25f31eb">ripple::parseProtocolVersions</a></div><div class="ttdeci">std::vector< ProtocolVersion > parseProtocolVersions(boost::beast::string_view const &value)</div><div class="ttdoc">Parse a set of protocol versions.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8cpp_source.html#l00078">ProtocolVersion.cpp:78</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a115d5c8fd15fe92c47231fee7fad7c7c"><div class="ttname"><a href="namespaceripple.html#a115d5c8fd15fe92c47231fee7fad7c7c">ripple::ProtocolVersion</a></div><div class="ttdeci">std::pair< std::uint16_t, std::uint16_t > ProtocolVersion</div><div class="ttdoc">Represents a particular version of the peer-to-peer protocol.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8h_source.html#l00037">ProtocolVersion.h:37</a></div></div>
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<div class="ttc" id="afunction_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/functional/function.html">std::function</a></div></div>
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<div class="ttc" id="asort_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/sort.html">std::sort</a></div><div class="ttdeci">T sort(T... args)</div></div>
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<div class="ttc" id="aalgorithm_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a></div></div>
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<div class="ttc" id="apush_back_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">std::vector::push_back</a></div><div class="ttdeci">T push_back(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_aced8b925a4e55f7220e7791fb306f676"><div class="ttname"><a href="namespaceripple.html#aced8b925a4e55f7220e7791fb306f676">ripple::supportedProtocolList</a></div><div class="ttdeci">constexpr const ProtocolVersion supportedProtocolList[]</div><div class="ttdoc">The list of protocol versions we speak and we prefer to use.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8cpp_source.html#l00038">ProtocolVersion.cpp:38</a></div></div>
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<div class="ttc" id="ato_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/to_string.html">std::to_string</a></div><div class="ttdeci">T to_string(T... args)</div></div>
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<div class="ttc" id="aerase_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/erase.html">std::vector::erase</a></div><div class="ttdeci">T erase(T... args)</div></div>
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<div class="ttc" id="ainteger_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint16_t</a></div></div>
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<div class="ttc" id="anamespacebeast_1_1rfc2616_html_a4c2f1ae5d7c29a1b452c4fa1d3751e8e"><div class="ttname"><a href="namespacebeast_1_1rfc2616.html#a4c2f1ae5d7c29a1b452c4fa1d3751e8e">beast::rfc2616::split_commas</a></div><div class="ttdeci">Result split_commas(FwdIt first, FwdIt last)</div><div class="ttdef"><b>Definition:</b> <a href="rfc2616_8h_source.html#l00199">rfc2616.h:199</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a72ff7246abef14a2be411b9002f81beb"><div class="ttname"><a href="namespaceripple.html#a72ff7246abef14a2be411b9002f81beb">ripple::supportedProtocolVersions</a></div><div class="ttdeci">std::string const & supportedProtocolVersions()</div><div class="ttdoc">The list of all the protocol versions we support.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8cpp_source.html#l00156">ProtocolVersion.cpp:156</a></div></div>
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<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="RCLCensorshipDetector_8h_source.html#l00029">RCLCensorshipDetector.h:29</a></div></div>
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<div class="ttc" id="anamespacebeast_html_aeb241ed2f4422ea57283956ca58c5d42"><div class="ttname"><a href="namespacebeast.html#aeb241ed2f4422ea57283956ca58c5d42">beast::lexicalCastChecked</a></div><div class="ttdeci">bool lexicalCastChecked(Out &out, In in)</div><div class="ttdoc">Intelligently convert from one type to another.</div><div class="ttdef"><b>Definition:</b> <a href="LexicalCast_8h_source.html#l00266">LexicalCast.h:266</a></div></div>
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<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>
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<div class="ttc" id="anamespaceripple_html_ac5afac59670d5c595215479acb2741bd"><div class="ttname"><a href="namespaceripple.html#ac5afac59670d5c595215479acb2741bd">ripple::isProtocolSupported</a></div><div class="ttdeci">bool isProtocolSupported(ProtocolVersion const &v)</div><div class="ttdoc">Determine whether we support a specific protocol version.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8cpp_source.html#l00174">ProtocolVersion.cpp:174</a></div></div>
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<div class="ttc" id="aempty_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">std::string::empty</a></div><div class="ttdeci">T empty(T... args)</div></div>
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<div class="ttc" id="aunique_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/unique.html">std::unique</a></div><div class="ttdeci">T unique(T... args)</div></div>
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<div class="ttc" id="aoptional_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/optional.html">std::optional</a></div></div>
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<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>
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<div class="ttc" id="aset_intersection_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/set_intersection.html">std::set_intersection</a></div><div class="ttdeci">T set_intersection(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a0a6d7ab3fd095a10fd8bd6d140dcd55b"><div class="ttname"><a href="namespaceripple.html#a0a6d7ab3fd095a10fd8bd6d140dcd55b">ripple::negotiateProtocolVersion</a></div><div class="ttdeci">std::optional< ProtocolVersion > negotiateProtocolVersion(std::vector< ProtocolVersion > const &versions)</div><div class="ttdoc">Given a list of supported protocol versions, choose the one we prefer.</div><div class="ttdef"><b>Definition:</b> <a href="ProtocolVersion_8cpp_source.html#l00125">ProtocolVersion.cpp:125</a></div></div>
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