IVGCVSW-7968 Update Doxygen docu for 24.02
Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Change-Id: I8c1e45815c6cf78f80d6f2c0959a5bbba6cd11de
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+<div class="title">Optional.hpp</div> </div>
+</div><!--header-->
+<div class="contents">
+<a href="_optional_8hpp.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">//</span></div>
+<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright © 2017 Arm Ltd. All rights reserved.</span></div>
+<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// SPDX-License-Identifier: MIT</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="preprocessor">#pragma once</span></div>
+<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
+<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "<a class="code" href="_exceptions_8hpp.html">Exceptions.hpp</a>"</span></div>
+<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
+<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <cstring></span></div>
+<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <type_traits></span></div>
+<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">/// Optional is a drop in replacement for std::optional until we migrate</span></div>
+<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">/// to c++-17. Only a subset of the optional features are implemented that</span></div>
+<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">/// we intend to use in ArmNN.</span></div>
+<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"></span><span class="comment"></span> </div>
+<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">/// There are two distinct implementations here:</span></div>
+<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">/// 1, for normal constructable/destructable types and reference types</span></div>
+<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">/// 2, for reference types</span></div>
+<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span><span class="comment"></span> </div>
+<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">/// The std::optional features we support are:</span></div>
+<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">/// - has_value() and operator bool() to tell if the optional has a value</span></div>
+<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/// - value() returns a reference to the held object</span></div>
+<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span><a class="code" href="namespacearmnn.html">armnn</a></div>
+<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> {</div>
+<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">/// EmptyOptional is used to initialize the Optional class in case we want</span></div>
+<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">/// to have default value for an Optional in a function declaration.</span></div>
+<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="structarmnn_1_1_empty_optional.html"> 32</a></span> <span class="comment"></span><span class="keyword">struct </span><a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</a> {};</div>
+<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">/// Disambiguation tag that can be passed to the constructor to indicate that</span></div>
+<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">/// the contained object should be constructed in-place</span></div>
+<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="structarmnn_1_1_construct_in_place.html"> 36</a></span> <span class="comment"></span><span class="keyword">struct </span><a class="code" href="structarmnn_1_1_construct_in_place.html">ConstructInPlace</a></div>
+<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> {</div>
+<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">explicit</span> <a class="code" href="structarmnn_1_1_construct_in_place.html#acea6a95844ea6127b802f2ef6769e8a0">ConstructInPlace</a>() = <span class="keywordflow">default</span>;</div>
+<div class="line"><a name="l00039"></a><span class="lineno"> 39</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"><a class="line" href="_optional_8hpp.html#acbec11f88a308826fa811f370d363a4a"> 41</a></span> <span class="preprocessor">#define CONSTRUCT_IN_PLACE armnn::ConstructInPlace{}</span></div>
+<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/// OptionalBase is the common functionality between reference and non-reference</span></div>
+<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">/// optional types.</span></div>
+<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html"> 45</a></span> <span class="comment"></span><span class="keyword">class </span><a class="code" href="classarmnn_1_1_optional_base.html">OptionalBase</a></div>
+<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> {</div>
+<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">public</span>:</div>
+<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html#ac2bde2f7113f72440ad3638eeb4d06f6"> 48</a></span>  <a class="code" href="classarmnn_1_1_optional_base.html#ac2bde2f7113f72440ad3638eeb4d06f6">OptionalBase</a>() noexcept</div>
+<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  : <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a>{<span class="keyword">false</span>}</div>
+<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div>
+<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div>
+<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
+<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f"> 53</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>() const noexcept</div>
+<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  {</div>
+<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a>;</div>
+<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
+<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// Conversion to bool, so can be used in if-statements and similar contexts expecting a bool.</span></div>
+<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> /// Note this is explicit so that it doesn't get implicitly converted to a bool in unwanted cases,</span></div>
+<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> /// for example "Optional<TypeA> == Optional<TypeB>" should not compile.</span></div>
+<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html#a420e60e9788bfa3b52aa3aab72ea3a5e"> 61</a></span> <span class="comment"></span> <span class="keyword">explicit</span> <span class="keyword">operator</span> bool() const noexcept</div>
+<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {</div>
+<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> <a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</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>  </div>
+<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">protected</span>:</div>
+<div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html#a50b53f38c96fdf12c90890d2dfbb8719"> 67</a></span>  <a class="code" href="classarmnn_1_1_optional_base.html#a50b53f38c96fdf12c90890d2dfbb8719">OptionalBase</a>(<span class="keywordtype">bool</span> hasValue) noexcept</div>
+<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  : <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a>{hasValue}</div>
+<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div>
+<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div>
+<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
+<div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e"> 72</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a>;</div>
+<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> };</div>
+<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">/// The default implementation is the non-reference case. This</span></div>
+<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">/// has an unsigned char array for storing the optional value which</span></div>
+<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/// is in-place constructed there.</span></div>
+<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keywordtype">bool</span> IsReference, <span class="keyword">typename</span> T></div>
+<div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html"> 81</a></span> <span class="keyword">class </span><a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a> : <span class="keyword">public</span> <a class="code" href="classarmnn_1_1_optional_base.html">OptionalBase</a></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">public</span>:</div>
+<div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#a13da864f1d4a5e3957ba70473f8fbf8d"> 84</a></span>  <span class="keyword">using</span> <a class="code" href="classarmnn_1_1_optional_base.html">Base</a> = <a class="code" href="classarmnn_1_1_optional_base.html#ac2bde2f7113f72440ad3638eeb4d06f6">OptionalBase</a>;</div>
+<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
+<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#ae0e39323497d71182ed4ff2c15f1e565"> 86</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ae0e39323497d71182ed4ff2c15f1e565">OptionalReferenceSwitch</a>() noexcept : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{} {}</div>
+<div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#a13961a32b21df02dad8c66e11995f006"> 87</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a13961a32b21df02dad8c66e11995f006">OptionalReferenceSwitch</a>(<a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</a>) noexcept : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{} {}</div>
+<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
+<div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#a6beefcffe9bf038690c90acd176c2263"> 89</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a6beefcffe9bf038690c90acd176c2263">OptionalReferenceSwitch</a>(<span class="keyword">const</span> T& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>)</div>
+<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{}</div>
+<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  {</div>
+<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  Construct(<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>);</div>
+<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
+<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
+<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
+<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#a4f012dc9cb58d868dc77bb3b4ba3a76d"> 96</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a4f012dc9cb58d868dc77bb3b4ba3a76d">OptionalReferenceSwitch</a>(<a class="code" href="structarmnn_1_1_construct_in_place.html">ConstructInPlace</a>, Args&&... args)</div>
+<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{}</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>  Construct(<a class="code" href="_optional_8hpp.html#acbec11f88a308826fa811f370d363a4a">CONSTRUCT_IN_PLACE</a>, std::forward<Args>(args)...);</div>
+<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
+<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
+<div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#a66ffe2beacf3f0e66c2ccb21fcfba30f"> 102</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a66ffe2beacf3f0e66c2ccb21fcfba30f">OptionalReferenceSwitch</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& other)</div>
+<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{}</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="keyword">this</span> = other;</div>
+<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div>
+<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
+<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#abe5947e3f9acc0738b3ef2ee4cf3547d"> 108</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#abe5947e3f9acc0738b3ef2ee4cf3547d">operator=</a>(<span class="keyword">const</span> T& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>)</div>
+<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  {</div>
+<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  Construct(<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>);</div>
+<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
+<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div>
+<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
+<div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#afcdbef8eae7fb1de8ea387da20dd369c"> 115</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#afcdbef8eae7fb1de8ea387da20dd369c">operator=</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& other)</div>
+<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  {</div>
+<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> (other.<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>())</div>
+<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div>
+<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  Construct(other.<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>());</div>
+<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
+<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div>
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+<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div>
+<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div>
+<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#affce7d7dd75fd7b406f5112bd54ac7d8"> 126</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#affce7d7dd75fd7b406f5112bd54ac7d8">operator=</a>(<a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</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>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
+<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div>
+<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
+<div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch.html#abf0cbbed2029d141b8a8f1b39c7028f9"> 132</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#abf0cbbed2029d141b8a8f1b39c7028f9">~OptionalReferenceSwitch</a>()</div>
+<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div>
+<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  }</div>
+<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  </div>
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+<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div>
+<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">Base::has_value</a>())</div>
+<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  {</div>
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+<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">Base::m_HasValue</a> = <span class="keyword">false</span>;</div>
+<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div>
+<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }</div>
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+<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="keyword"> </span>{</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="l00151"></a><span class="lineno"> 151</span>  }</div>
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+<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span> *valuePtr;</div>
+<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
+<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  </div>
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+<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  {</div>
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+<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordtype">void</span> Construct(<span class="keyword">const</span> T& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>)</div>
+<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  {</div>
+<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keyword">new</span> (m_Storage) T(<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>);</div>
+<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a> = <span class="keyword">true</span>;</div>
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+<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
+<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordtype">void</span> Construct(ConstructInPlace, Args&&... args)</div>
+<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  {</div>
+<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">new</span> (m_Storage) T(std::forward<Args>(args)...);</div>
+<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">m_HasValue</a> = <span class="keyword">true</span>;</div>
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+<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  </div>
+<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">alignas</span>(<span class="keyword">alignof</span>(T)) <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> m_Storage[<span class="keyword">sizeof</span>(T)] = {};</div>
+<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> };</div>
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+<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment">/// This is the special case for reference types. This holds a pointer</span></div>
+<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment">/// to the referenced type. This doesn't own the referenced memory and</span></div>
+<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment">/// it never calls delete on the pointer.</span></div>
+<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment">///</span></div>
+<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
+<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html"> 191</a></span> <span class="keyword">class </span><a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a><true, T> : <span class="keyword">public</span> <a class="code" href="classarmnn_1_1_optional_base.html">OptionalBase</a></div>
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+<div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#aa35457bd4f798de06bf5742117fbaf16"> 195</a></span>  <span class="keyword">using</span> <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#aa35457bd4f798de06bf5742117fbaf16">NonRefT</a> = <span class="keyword">typename</span> std::remove_reference<T>::type;</div>
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+<div class="line"><a name="l00198"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a13961a32b21df02dad8c66e11995f006"> 198</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a13961a32b21df02dad8c66e11995f006">OptionalReferenceSwitch</a>(<a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</a>) noexcept : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{}, m_Storage{<span class="keyword">nullptr</span>} {}</div>
+<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  </div>
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+<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  : <a class="code" href="classarmnn_1_1_optional_base.html">Base</a>{<span class="keyword">true</span>}</div>
+<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  , m_Storage{&<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>}</div>
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+<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  </div>
+<div class="line"><a name="l00221"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#afcdbef8eae7fb1de8ea387da20dd369c"> 221</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#afcdbef8eae7fb1de8ea387da20dd369c">operator=</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& other)</div>
+<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  {</div>
+<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  m_Storage = other.m_Storage;</div>
+<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">Base::m_HasValue</a> = other.<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>();</div>
+<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
+<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div>
+<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
+<div class="line"><a name="l00228"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#affce7d7dd75fd7b406f5112bd54ac7d8"> 228</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a>& <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#affce7d7dd75fd7b406f5112bd54ac7d8">operator=</a>(<a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</a>)</div>
+<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  {</div>
+<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
+<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
+<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  </div>
+<div class="line"><a name="l00234"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#abf0cbbed2029d141b8a8f1b39c7028f9"> 234</a></span>  <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#abf0cbbed2029d141b8a8f1b39c7028f9">~OptionalReferenceSwitch</a>()</div>
+<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  {</div>
+<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">reset</a>();</div>
+<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
+<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
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+<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  {</div>
+<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <a class="code" href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">Base::m_HasValue</a> = <span class="keyword">false</span>;</div>
+<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  m_Storage = <span class="keyword">nullptr</span>;</div>
+<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div>
+<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  </div>
+<div class="line"><a name="l00245"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#ab657408af6365dc01548c8befa2011bf"> 245</a></span>  <span class="keyword">const</span> T <a class="code" href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#ab657408af6365dc01548c8befa2011bf">value</a>()<span class="keyword"> const</span></div>
+<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="keyword"> </span>{</div>
+<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (!<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">Base::has_value</a>())</div>
+<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  {</div>
+<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_bad_optional_access_exception.html">BadOptionalAccessException</a>(<span class="stringliteral">"Optional has no value"</span>);</div>
+<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  }</div>
+<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  </div>
+<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">return</span> *m_Storage;</div>
+<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
+<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  </div>
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+<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  {</div>
+<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (!<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">Base::has_value</a>())</div>
+<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  {</div>
+<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">throw</span> <a class="code" href="classarmnn_1_1_bad_optional_access_exception.html">BadOptionalAccessException</a>(<span class="stringliteral">"Optional has no value"</span>);</div>
+<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
+<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  </div>
+<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">return</span> *m_Storage;</div>
+<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div>
+<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  </div>
+<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keyword">private</span>:</div>
+<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  NonRefT* m_Storage;</div>
+<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> };</div>
+<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  </div>
+<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
+<div class="line"><a name="l00270"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html"> 270</a></span> <span class="keyword">class </span><a class="code" href="classarmnn_1_1_optional.html">Optional</a> final : <span class="keyword">public</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch</a><std::is_reference<T>::value, T></div>
+<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> {</div>
+<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">public</span>:</div>
+<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#ad10f4d634fc3080d680a3a7a004e098f"> 273</a></span>  <span class="keyword">using</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a> = <a class="code" href="classarmnn_1_1_optional_reference_switch.html">OptionalReferenceSwitch<std::is_reference<T>::value</a>, T>;</div>
+<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  </div>
+<div class="line"><a name="l00275"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#a0ba66c8e63acad2362782737bdc1e50a"> 275</a></span>  <a class="code" href="classarmnn_1_1_optional.html#a0ba66c8e63acad2362782737bdc1e50a">Optional</a>() noexcept : <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>{} {}</div>
+<div class="line"><a name="l00276"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#ad821ad3ce9685b41025f5f70481ec2d7"> 276</a></span>  <a class="code" href="classarmnn_1_1_optional.html#ad821ad3ce9685b41025f5f70481ec2d7">Optional</a>(<span class="keyword">const</span> T& <a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>) : <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>{<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>} {}</div>
+<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <a class="code" href="classarmnn_1_1_optional.html#a0ba66c8e63acad2362782737bdc1e50a">Optional</a>& <a class="code" href="classarmnn_1_1_optional.html#a27ea92da9f8129f5abfabc4ef53091c9">operator=</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional.html#a0ba66c8e63acad2362782737bdc1e50a">Optional</a>& other) = <span class="keywordflow">default</span>;</div>
+<div class="line"><a name="l00278"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#a5569b19b8dc99204c286f32c2c979eb6"> 278</a></span>  <a class="code" href="classarmnn_1_1_optional.html#a5569b19b8dc99204c286f32c2c979eb6">Optional</a>(<a class="code" href="structarmnn_1_1_empty_optional.html">EmptyOptional</a> empty) : <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>{empty} {}</div>
+<div class="line"><a name="l00279"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#ab71d669cf5dc14eb564c64345be02198"> 279</a></span>  <a class="code" href="classarmnn_1_1_optional.html#ab71d669cf5dc14eb564c64345be02198">Optional</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional.html">Optional</a>& other) : <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>{other} {}</div>
+<div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#ad6bb5bce1d9fcc1ea1d672543c75db4e"> 280</a></span>  <a class="code" href="classarmnn_1_1_optional.html#ad6bb5bce1d9fcc1ea1d672543c75db4e">Optional</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>& other) : <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>{other} {}</div>
+<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  </div>
+<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keyword">template</span><<span class="keyword">class</span>... Args></div>
+<div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#a2e14620644d695df278fc6a84c8a63dc"> 283</a></span>  <span class="keyword">explicit</span> <a class="code" href="classarmnn_1_1_optional.html#a2e14620644d695df278fc6a84c8a63dc">Optional</a>(<a class="code" href="structarmnn_1_1_construct_in_place.html">ConstructInPlace</a>, Args&&... args) :</div>
+<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <a class="code" href="classarmnn_1_1_optional_reference_switch.html">BaseSwitch</a>(<a class="code" href="_optional_8hpp.html#acbec11f88a308826fa811f370d363a4a">CONSTRUCT_IN_PLACE</a>, <a class="code" href="namespacestd.html">std</a>::forward<Args>(args)...) {}</div>
+<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment"> /// Two optionals are considered equal if they are both empty or both contain values which</span></div>
+<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment"> /// themselves are considered equal (via their own == operator).</span></div>
+<div class="line"><a name="l00288"></a><span class="lineno"><a class="line" href="classarmnn_1_1_optional.html#aa68a881b2258017440f00f1bf3cd0e74"> 288</a></span> <span class="comment"></span> <span class="keywordtype">bool</span> <a class="code" href="classarmnn_1_1_optional.html#aa68a881b2258017440f00f1bf3cd0e74">operator==</a>(<span class="keyword">const</span> <a class="code" href="classarmnn_1_1_optional.html">Optional<T></a>& rhs)<span class="keyword"> const</span></div>
+<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="keyword"> </span>{</div>
+<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">if</span> (!this-><a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>() && !rhs.<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>())</div>
+<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  {</div>
+<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
+<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
+<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span> (this-><a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>() && rhs.<a class="code" href="classarmnn_1_1_optional_base.html#a86b749ce2c4bc627fa8a1fcfaf0e314f">has_value</a>() && this->value() == rhs.<a class="code" href="classarmnn_1_1_optional_reference_switch.html#a77c7d528ac063d870b8c8426ec81c1c3">value</a>())</div>
+<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  {</div>
+<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
+<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
+<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
+<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
+<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> };</div>
+<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment"></span> </div>
+<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment">/// Utility template that constructs an object of type T in-place and wraps</span></div>
+<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment">/// it inside an Optional<T> object</span></div>
+<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"></span><span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">class</span>... Args></div>
+<div class="line"><a name="l00305"></a><span class="lineno"><a class="line" href="namespacearmnn.html#a77780137c47f528921f6537447060f05"> 305</a></span> <a class="code" href="classarmnn_1_1_optional.html">Optional<T></a> <a class="code" href="namespacearmnn.html#a77780137c47f528921f6537447060f05">MakeOptional</a>(Args&&... args)</div>
+<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> {</div>
+<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">return</span> <a class="code" href="classarmnn_1_1_optional.html">Optional<T></a>(<a class="code" href="_optional_8hpp.html#acbec11f88a308826fa811f370d363a4a">CONSTRUCT_IN_PLACE</a>, std::forward<Args>(args)...);</div>
+<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> }</div>
+<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  </div>
+<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> }</div>
+</div><!-- fragment --></div><!-- contents -->
+</div><!-- doc-content -->
+<div class="ttc" id="a_optional_8hpp_html_acbec11f88a308826fa811f370d363a4a"><div class="ttname"><a href="_optional_8hpp.html#acbec11f88a308826fa811f370d363a4a">CONSTRUCT_IN_PLACE</a></div><div class="ttdeci">#define CONSTRUCT_IN_PLACE</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00041">Optional.hpp:41</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html"><div class="ttname"><a href="classarmnn_1_1_optional.html">armnn::Optional</a></div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00270">Optional.hpp:270</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_base_html_a50b53f38c96fdf12c90890d2dfbb8719"><div class="ttname"><a href="classarmnn_1_1_optional_base.html#a50b53f38c96fdf12c90890d2dfbb8719">armnn::OptionalBase::OptionalBase</a></div><div class="ttdeci">OptionalBase(bool hasValue) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00067">Optional.hpp:67</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_base_html"><div class="ttname"><a href="classarmnn_1_1_optional_base.html">armnn::OptionalBase</a></div><div class="ttdoc">OptionalBase is the common functionality between reference and non-reference optional types.</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00045">Optional.hpp:45</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_abf0cbbed2029d141b8a8f1b39c7028f9"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#abf0cbbed2029d141b8a8f1b39c7028f9">armnn::OptionalReferenceSwitch::~OptionalReferenceSwitch</a></div><div class="ttdeci">~OptionalReferenceSwitch()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00132">Optional.hpp:132</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_base_html_ac2bde2f7113f72440ad3638eeb4d06f6"><div class="ttname"><a href="classarmnn_1_1_optional_base.html#ac2bde2f7113f72440ad3638eeb4d06f6">armnn::OptionalBase::OptionalBase</a></div><div class="ttdeci">OptionalBase() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00048">Optional.hpp:48</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_abf0cbbed2029d141b8a8f1b39c7028f9"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#abf0cbbed2029d141b8a8f1b39c7028f9">armnn::OptionalReferenceSwitch< true, T >::~OptionalReferenceSwitch</a></div><div class="ttdeci">~OptionalReferenceSwitch()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00234">Optional.hpp:234</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_a13961a32b21df02dad8c66e11995f006"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#a13961a32b21df02dad8c66e11995f006">armnn::OptionalReferenceSwitch::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(EmptyOptional) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00087">Optional.hpp:87</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_a6beefcffe9bf038690c90acd176c2263"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#a6beefcffe9bf038690c90acd176c2263">armnn::OptionalReferenceSwitch::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(const T &value)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00089">Optional.hpp:89</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_affce7d7dd75fd7b406f5112bd54ac7d8"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#affce7d7dd75fd7b406f5112bd54ac7d8">armnn::OptionalReferenceSwitch< true, T >::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(EmptyOptional)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00228">Optional.hpp:228</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_a4f012dc9cb58d868dc77bb3b4ba3a76d"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#a4f012dc9cb58d868dc77bb3b4ba3a76d">armnn::OptionalReferenceSwitch::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(ConstructInPlace, Args &&... args)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00096">Optional.hpp:96</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_a5569b19b8dc99204c286f32c2c979eb6"><div class="ttname"><a href="classarmnn_1_1_optional.html#a5569b19b8dc99204c286f32c2c979eb6">armnn::Optional::Optional</a></div><div class="ttdeci">Optional(EmptyOptional empty)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00278">Optional.hpp:278</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_affce7d7dd75fd7b406f5112bd54ac7d8"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#affce7d7dd75fd7b406f5112bd54ac7d8">armnn::OptionalReferenceSwitch::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(EmptyOptional)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00126">Optional.hpp:126</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_afcdbef8eae7fb1de8ea387da20dd369c"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#afcdbef8eae7fb1de8ea387da20dd369c">armnn::OptionalReferenceSwitch< true, T >::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(const OptionalReferenceSwitch &other)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00221">Optional.hpp:221</a></div></div>
+<div class="ttc" id="astructarmnn_1_1_empty_optional_html"><div class="ttname"><a href="structarmnn_1_1_empty_optional.html">armnn::EmptyOptional</a></div><div class="ttdoc">EmptyOptional is used to initialize the Optional class in case we want to have default value for an O...</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00032">Optional.hpp:32</a></div></div>
+<div class="ttc" id="astructarmnn_1_1_construct_in_place_html"><div class="ttname"><a href="structarmnn_1_1_construct_in_place.html">armnn::ConstructInPlace</a></div><div class="ttdoc">Disambiguation tag that can be passed to the constructor to indicate that the contained object should...</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00036">Optional.hpp:36</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_ae0e39323497d71182ed4ff2c15f1e565"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#ae0e39323497d71182ed4ff2c15f1e565">armnn::OptionalReferenceSwitch< true, T >::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00197">Optional.hpp:197</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_aa35457bd4f798de06bf5742117fbaf16"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#aa35457bd4f798de06bf5742117fbaf16">armnn::OptionalReferenceSwitch< true, T >::NonRefT</a></div><div class="ttdeci">typename std::remove_reference< T >::type NonRefT</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00195">Optional.hpp:195</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_ad6bb5bce1d9fcc1ea1d672543c75db4e"><div class="ttname"><a href="classarmnn_1_1_optional.html#ad6bb5bce1d9fcc1ea1d672543c75db4e">armnn::Optional::Optional</a></div><div class="ttdeci">Optional(const BaseSwitch &other)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00280">Optional.hpp:280</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_base_html_a53e87efb7e1b2df3dc4420dafaf2ee7e"><div class="ttname"><a href="classarmnn_1_1_optional_base.html#a53e87efb7e1b2df3dc4420dafaf2ee7e">armnn::OptionalBase::m_HasValue</a></div><div class="ttdeci">bool m_HasValue</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00072">Optional.hpp:72</a></div></div>
+<div class="ttc" id="anamespacearmnn_html_a77780137c47f528921f6537447060f05"><div class="ttname"><a href="namespacearmnn.html#a77780137c47f528921f6537447060f05">armnn::MakeOptional</a></div><div class="ttdeci">Optional< T > MakeOptional(Args &&... args)</div><div class="ttdoc">Utility template that constructs an object of type T in-place and wraps it inside an Optional<T> obje...</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00305">Optional.hpp:305</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_ad20897c5c8bd47f5d4005989bead0e55"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#ad20897c5c8bd47f5d4005989bead0e55">armnn::OptionalReferenceSwitch< true, T >::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00239">Optional.hpp:239</a></div></div>
+<div class="ttc" id="astructarmnn_1_1_construct_in_place_html_acea6a95844ea6127b802f2ef6769e8a0"><div class="ttname"><a href="structarmnn_1_1_construct_in_place.html#acea6a95844ea6127b802f2ef6769e8a0">armnn::ConstructInPlace::ConstructInPlace</a></div><div class="ttdeci">ConstructInPlace()=default</div></div>
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+<div class="ttc" id="anamespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdef"><b>Definition:</b> <a href="_backend_id_8hpp_source.html#l00149">BackendId.hpp:149</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_aa68a881b2258017440f00f1bf3cd0e74"><div class="ttname"><a href="classarmnn_1_1_optional.html#aa68a881b2258017440f00f1bf3cd0e74">armnn::Optional::operator==</a></div><div class="ttdeci">bool operator==(const Optional< T > &rhs) const</div><div class="ttdoc">Two optionals are considered equal if they are both empty or both contain values which themselves are...</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00288">Optional.hpp:288</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_a0ba66c8e63acad2362782737bdc1e50a"><div class="ttname"><a href="classarmnn_1_1_optional.html#a0ba66c8e63acad2362782737bdc1e50a">armnn::Optional::Optional</a></div><div class="ttdeci">Optional() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00275">Optional.hpp:275</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_bad_optional_access_exception_html"><div class="ttname"><a href="classarmnn_1_1_bad_optional_access_exception.html">armnn::BadOptionalAccessException</a></div><div class="ttdef"><b>Definition:</b> <a href="_exceptions_8hpp_source.html#l00115">Exceptions.hpp:115</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_a079e5fefe2d24504f6742516fe515ffe"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a079e5fefe2d24504f6742516fe515ffe">armnn::OptionalReferenceSwitch< true, T >::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(const T value)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00214">Optional.hpp:214</a></div></div>
+<div class="ttc" id="a_exceptions_8hpp_html"><div class="ttname"><a href="_exceptions_8hpp.html">Exceptions.hpp</a></div></div>
+<div class="ttc" id="anamespacearmnn_html"><div class="ttname"><a href="namespacearmnn.html">armnn</a></div><div class="ttdoc">Copyright (c) 2021 ARM Limited and Contributors.</div><div class="ttdef"><b>Definition:</b> <a href="01__00__quick__start_8dox_source.html#l00006">01_00_quick_start.dox:6</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_a7f3f2d9ab25077e28a310bd9ca871556"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a7f3f2d9ab25077e28a310bd9ca871556">armnn::OptionalReferenceSwitch< true, T >::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(T value)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00205">Optional.hpp:205</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_a66ffe2beacf3f0e66c2ccb21fcfba30f"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a66ffe2beacf3f0e66c2ccb21fcfba30f">armnn::OptionalReferenceSwitch< true, T >::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(const OptionalReferenceSwitch &other)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00200">Optional.hpp:200</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_ae0e39323497d71182ed4ff2c15f1e565"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#ae0e39323497d71182ed4ff2c15f1e565">armnn::OptionalReferenceSwitch::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00086">Optional.hpp:86</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_a35cbddae445b41e7fca89827efecf90c"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a35cbddae445b41e7fca89827efecf90c">armnn::OptionalReferenceSwitch< true, T >::value</a></div><div class="ttdeci">T value()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00255">Optional.hpp:255</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_abe5947e3f9acc0738b3ef2ee4cf3547d"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#abe5947e3f9acc0738b3ef2ee4cf3547d">armnn::OptionalReferenceSwitch::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(const T &value)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00108">Optional.hpp:108</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_ad20897c5c8bd47f5d4005989bead0e55"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#ad20897c5c8bd47f5d4005989bead0e55">armnn::OptionalReferenceSwitch::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00137">Optional.hpp:137</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_a13961a32b21df02dad8c66e11995f006"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#a13961a32b21df02dad8c66e11995f006">armnn::OptionalReferenceSwitch< true, T >::OptionalReferenceSwitch</a></div><div class="ttdeci">OptionalReferenceSwitch(EmptyOptional) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00198">Optional.hpp:198</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_ab71d669cf5dc14eb564c64345be02198"><div class="ttname"><a href="classarmnn_1_1_optional.html#ab71d669cf5dc14eb564c64345be02198">armnn::Optional::Optional</a></div><div class="ttdeci">Optional(const Optional &other)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00279">Optional.hpp:279</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4_html_ab657408af6365dc01548c8befa2011bf"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch_3_01true_00_01_t_01_4.html#ab657408af6365dc01548c8befa2011bf">armnn::OptionalReferenceSwitch< true, T >::value</a></div><div class="ttdeci">const T value() const</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00245">Optional.hpp:245</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_a464298ad7afeafebbb149f566ecabbab"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#a464298ad7afeafebbb149f566ecabbab">armnn::OptionalReferenceSwitch::value</a></div><div class="ttdeci">T & value()</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00157">Optional.hpp:157</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_ad821ad3ce9685b41025f5f70481ec2d7"><div class="ttname"><a href="classarmnn_1_1_optional.html#ad821ad3ce9685b41025f5f70481ec2d7">armnn::Optional::Optional</a></div><div class="ttdeci">Optional(const T &value)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00276">Optional.hpp:276</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_html_a2e14620644d695df278fc6a84c8a63dc"><div class="ttname"><a href="classarmnn_1_1_optional.html#a2e14620644d695df278fc6a84c8a63dc">armnn::Optional::Optional</a></div><div class="ttdeci">Optional(ConstructInPlace, Args &&... args)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00283">Optional.hpp:283</a></div></div>
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+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html">armnn::OptionalReferenceSwitch</a></div><div class="ttdoc">The default implementation is the non-reference case.</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00081">Optional.hpp:81</a></div></div>
+<div class="ttc" id="aclassarmnn_1_1_optional_reference_switch_html_afcdbef8eae7fb1de8ea387da20dd369c"><div class="ttname"><a href="classarmnn_1_1_optional_reference_switch.html#afcdbef8eae7fb1de8ea387da20dd369c">armnn::OptionalReferenceSwitch::operator=</a></div><div class="ttdeci">OptionalReferenceSwitch & operator=(const OptionalReferenceSwitch &other)</div><div class="ttdef"><b>Definition:</b> <a href="_optional_8hpp_source.html#l00115">Optional.hpp:115</a></div></div>
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