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<a href="cpp-package_2include_2mxnet-cpp_2executor_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#ifndef MXNET_CPP_EXECUTOR_H_</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#define MXNET_CPP_EXECUTOR_H_</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;map&gt;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &lt;set&gt;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="cpp-package_2include_2mxnet-cpp_2base_8h.html">mxnet-cpp/base.h</a>&quot;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="symbol_8h.html">mxnet-cpp/symbol.h</a>&quot;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacemxnet.html">mxnet</a> {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">namespace </span>cpp {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="keyword">class </span>Optimizer;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; </div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html"> 45</a></span>&#160;<span class="keyword">class </span><a class="code" href="classmxnet_1_1cpp_1_1Executor.html">Executor</a> {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a86cd99024edf91d7554f28c5e128dc7e">Executor</a>(<span class="keyword">const</span> <a class="code" href="classmxnet_1_1cpp_1_1Symbol.html">Symbol</a>&amp; symbol,</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Context.html">Context</a> context,</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keyword">const</span> std::vector&lt;NDArray&gt;&amp; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">arg_arrays</a>,</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keyword">const</span> std::vector&lt;NDArray&gt;&amp; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>,</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keyword">const</span> std::vector&lt;OpReqType&gt;&amp; grad_reqs,</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">const</span> std::vector&lt;NDArray&gt;&amp; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a11cc4c29bb7d5f859e9bbb4bc0df51ab">aux_arrays</a>,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">const</span> std::map&lt;std::string, Context&gt;&amp; group_to_ctx = std::map&lt;std::string, Context&gt;(),</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html">Executor</a>* shared_exec = <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a78c73fba32cdd68ac76389813158af1d"> 55</a></span>&#160; <span class="keyword">explicit</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a78c73fba32cdd68ac76389813158af1d">Executor</a>(<span class="keyword">const</span> <a class="code" href="include_2mxnet_2c__api_8h.html#aac4a2be6e40b0869bcc390a573a7e489">CachedOpHandle</a>&amp; h) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; handle_ = h;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; }</div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a1fef41367238aaf8315fe5715a9f8f47"> 62</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a1fef41367238aaf8315fe5715a9f8f47">Forward</a>(<span class="keywordtype">bool</span> is_train) {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; std::vector&lt;NDArrayHandle&gt; arg_handles;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; array : <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a323bae1c2e05e9ab5437845a71d3c1b6">combined_arrays</a>) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; arg_handles.push_back(array.GetHandle());</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordtype">int</span> prev_is_record = 0;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordtype">int</span> prev_train_mode = 0;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#a75939e5be09a150d4d8905c9fd6e986e">MXAutogradSetIsRecording</a>(1, &amp;prev_is_record), 0);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">if</span> (is_train == <span class="keyword">true</span>) {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#a9cf2b0aa3ff66119fe793f6ed82b61b8">MXAutogradSetIsTraining</a>(1, &amp;prev_train_mode), 0);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; std::vector&lt;NDArrayHandle&gt; output_handles;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; std::transform(</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.begin(), <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.end(), std::back_inserter(output_handles), [](<a class="code" href="classmxnet_1_1cpp_1_1NDArray.html">NDArray</a>&amp; a) {</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; return a.GetHandle();</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; });</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordtype">int</span> out_size = 0;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <a class="code" href="classmxnet_1_1NDArrayHandle.html">NDArrayHandle</a>* out_array = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#aa1d00c3df18b5c4db3824e7482afffdf">MXInvokeCachedOp</a>(handle_,</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; arg_handles.size(),</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; arg_handles.data(),</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a052f7e89167c76f68af0ebb74b90845a">device_type</a>,</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#abf83aa2e83d149a1b2c861bd33cb4d4e">device_id</a>,</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; &amp;out_size,</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; &amp;out_array,</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">nullptr</span>),</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; 0);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.clear();</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.reserve(out_size);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">for</span> (<a class="code" href="include_2mxnet_2c__api_8h.html#a3438cf44a22968b254a78032ca0c2c59">mx_uint</a> i = 0; i &lt; out_size; ++i) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.push_back(<a class="code" href="classmxnet_1_1cpp_1_1NDArray.html">NDArray</a>(out_array[i]));</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; }</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordtype">int</span> cur_train_mode = prev_train_mode;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordtype">int</span> cur_is_record = prev_is_record;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">if</span> (is_train == <span class="keyword">true</span>) {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#a9cf2b0aa3ff66119fe793f6ed82b61b8">MXAutogradSetIsTraining</a>(cur_train_mode, &amp;prev_train_mode), 0);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#a75939e5be09a150d4d8905c9fd6e986e">MXAutogradSetIsRecording</a>(cur_is_record, &amp;prev_is_record), 0);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; }</div>
<div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#abd98fc4f87cd8adea049a31a840898e4"> 111</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#abd98fc4f87cd8adea049a31a840898e4">Backward</a>(<span class="keyword">const</span> std::vector&lt;NDArray&gt;&amp; head_grads = std::vector&lt;NDArray&gt;()) {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a1aa4f05bce177a4f50a327c96c9894ce">require_grad</a> == <span class="keyword">true</span>) {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>.size() == 0) {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a1fef41367238aaf8315fe5715a9f8f47">Forward</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; std::vector&lt;NDArrayHandle&gt; out_handles;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; array : <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>) {</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; out_handles.push_back(array.GetHandle());</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; }</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; std::vector&lt;NDArrayHandle&gt; head_grads_;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">auto</span> d : head_grads) {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; head_grads_.push_back(d.GetHandle());</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">if</span> (head_grads_.size() &gt; 0) {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#ae7d510ccf536b6f3858ef106bf88d215">MXAutogradBackwardEx</a>(out_handles.size(),</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; out_handles.data(),</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; head_grads_.data(),</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; 0,</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; 0,</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; 0,</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; 1,</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keyword">nullptr</span>),</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; 0);</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#ae7d510ccf536b6f3858ef106bf88d215">MXAutogradBackwardEx</a>(out_handles.size(),</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; out_handles.data(),</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; 0,</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; 0,</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; 0,</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; 1,</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; <span class="keyword">nullptr</span>,</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; <span class="keyword">nullptr</span>),</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; 0);</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; }</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>.clear();</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>.reserve(<a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">arg_arrays</a>.size());</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; array : <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">arg_arrays</a>) {</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <a class="code" href="classmxnet_1_1NDArrayHandle.html">NDArrayHandle</a> grad;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; CHECK_EQ(<a class="code" href="include_2mxnet_2c__api_8h.html#aedb8d676502a66eef4a6c5988f73dccb">MXNDArrayGetGrad</a>(array.GetHandle(), &amp;grad), 0);</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>.push_back(<a class="code" href="classmxnet_1_1cpp_1_1NDArray.html">NDArray</a>(grad));</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; }</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="comment">// TODO(zhangchen-qinyinghua)</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <span class="comment">// To implement reshape function</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="keywordtype">void</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#aa4e594bc8b840f03c148aa84c472cb99">Reshape</a>();</div>
<div class="line"><a name="l00164"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#ad6a26ffaabff769ee829221ef47e29e6"> 164</a></span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ad6a26ffaabff769ee829221ef47e29e6">~Executor</a>() {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <a class="code" href="include_2mxnet_2c__api_8h.html#a83a34d6df4290e5efd737293cf875a9c">MXFreeCachedOp</a>(handle_);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; }</div>
<div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9"> 167</a></span>&#160; std::vector&lt;NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">arg_arrays</a>;</div>
<div class="line"><a name="l00168"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b"> 168</a></span>&#160; std::vector&lt;NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>;</div>
<div class="line"><a name="l00169"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a11cc4c29bb7d5f859e9bbb4bc0df51ab"> 169</a></span>&#160; std::vector&lt;NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a11cc4c29bb7d5f859e9bbb4bc0df51ab">aux_arrays</a>;</div>
<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a323bae1c2e05e9ab5437845a71d3c1b6"> 170</a></span>&#160; std::vector&lt;NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a323bae1c2e05e9ab5437845a71d3c1b6">combined_arrays</a>;</div>
<div class="line"><a name="l00171"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a052f7e89167c76f68af0ebb74b90845a"> 171</a></span>&#160; <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a052f7e89167c76f68af0ebb74b90845a">device_type</a>;</div>
<div class="line"><a name="l00172"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#abf83aa2e83d149a1b2c861bd33cb4d4e"> 172</a></span>&#160; <span class="keywordtype">int</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#abf83aa2e83d149a1b2c861bd33cb4d4e">device_id</a>;</div>
<div class="line"><a name="l00173"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a1aa4f05bce177a4f50a327c96c9894ce"> 173</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a1aa4f05bce177a4f50a327c96c9894ce">require_grad</a>;</div>
<div class="line"><a name="l00177"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933"> 177</a></span>&#160; std::vector&lt;NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">outputs</a>;</div>
<div class="line"><a name="l00178"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a942ef73436ecb2bcfde588e004037963"> 178</a></span>&#160; std::map&lt;std::string, NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a942ef73436ecb2bcfde588e004037963">arg_dict</a>() {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; <span class="keywordflow">return</span> GetDict(symbol_.<a class="code" href="classmxnet_1_1cpp_1_1Symbol.html#a00715c52f93164855a0390b5965a7f00">ListArguments</a>(), <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">arg_arrays</a>);</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; }</div>
<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a4ca4e8a5517ac2a35824adda6c80f872"> 181</a></span>&#160; std::map&lt;std::string, NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a4ca4e8a5517ac2a35824adda6c80f872">grad_dict</a>() {</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="keywordflow">return</span> GetDict(symbol_.<a class="code" href="classmxnet_1_1cpp_1_1Symbol.html#a00715c52f93164855a0390b5965a7f00">ListArguments</a>(), <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">grad_arrays</a>);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; }</div>
<div class="line"><a name="l00184"></a><span class="lineno"><a class="line" href="classmxnet_1_1cpp_1_1Executor.html#a6c6ef2d2f79c26fd0bad949243f7a37a"> 184</a></span>&#160; std::map&lt;std::string, NDArray&gt; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a6c6ef2d2f79c26fd0bad949243f7a37a">aux_dict</a>() {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="keywordflow">return</span> GetDict(symbol_.<a class="code" href="classmxnet_1_1cpp_1_1Symbol.html#a16ecc9398aed28206bfb189587a668c0">ListAuxiliaryStates</a>(), <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a11cc4c29bb7d5f859e9bbb4bc0df51ab">aux_arrays</a>);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html#a86cd99024edf91d7554f28c5e128dc7e">Executor</a>(<span class="keyword">const</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html">Executor</a>&amp; e);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Executor.html">Executor</a>&amp; operator=(<span class="keyword">const</span> <a class="code" href="classmxnet_1_1cpp_1_1Executor.html">Executor</a>&amp; e);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <a class="code" href="include_2mxnet_2c__api_8h.html#aac4a2be6e40b0869bcc390a573a7e489">CachedOpHandle</a> handle_;</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <a class="code" href="classmxnet_1_1cpp_1_1Symbol.html">Symbol</a> symbol_;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; std::map&lt;std::string, NDArray&gt; GetDict(<span class="keyword">const</span> std::vector&lt;std::string&gt;&amp; names,</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="keyword">const</span> std::vector&lt;NDArray&gt;&amp; arrays) {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; std::map&lt;std::string, NDArray&gt; ret;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; std::set&lt;std::string&gt; name_set;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; s : names) {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; CHECK(name_set.find(s) == name_set.end()) &lt;&lt; <span class="stringliteral">&quot;Duplicate names detected, &quot;</span> &lt;&lt; s;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; name_set.insert(s);</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; }</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; CHECK_EQ(name_set.size(), arrays.size()) &lt;&lt; <span class="stringliteral">&quot;names size not equal to arrays size&quot;</span>;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; names.size(); ++i) {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; ret[names[i]] = arrays[i];</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; }</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160;};</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160;} <span class="comment">// namespace cpp</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160;} <span class="comment">// namespace mxnet</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160;<span class="preprocessor">#endif // MXNET_CPP_EXECUTOR_H_</span></div>
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="anamespacemxnet_html"><div class="ttname"><a href="namespacemxnet.html">mxnet</a></div><div class="ttdoc">namespace of mxnet</div><div class="ttdef"><b>Definition:</b> api_registry.h:33</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_a9cf2b0aa3ff66119fe793f6ed82b61b8"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#a9cf2b0aa3ff66119fe793f6ed82b61b8">MXAutogradSetIsTraining</a></div><div class="ttdeci">MXNET_DLL int MXAutogradSetIsTraining(int is_training, int *prev)</div><div class="ttdoc">set whether to record operator for autograd</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_aac4a2be6e40b0869bcc390a573a7e489"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#aac4a2be6e40b0869bcc390a573a7e489">CachedOpHandle</a></div><div class="ttdeci">void * CachedOpHandle</div><div class="ttdoc">handle to cached operator</div><div class="ttdef"><b>Definition:</b> c_api.h:80</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a4ca4e8a5517ac2a35824adda6c80f872"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a4ca4e8a5517ac2a35824adda6c80f872">mxnet::cpp::Executor::grad_dict</a></div><div class="ttdeci">std::map&lt; std::string, NDArray &gt; grad_dict()</div><div class="ttdef"><b>Definition:</b> executor.h:181</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_abd98fc4f87cd8adea049a31a840898e4"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#abd98fc4f87cd8adea049a31a840898e4">mxnet::cpp::Executor::Backward</a></div><div class="ttdeci">void Backward(const std::vector&lt; NDArray &gt; &amp;head_grads=std::vector&lt; NDArray &gt;())</div><div class="ttdoc">Perform a Backward operation of the Operator. This must be called after Forward. After this operation...</div><div class="ttdef"><b>Definition:</b> executor.h:111</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a052f7e89167c76f68af0ebb74b90845a"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a052f7e89167c76f68af0ebb74b90845a">mxnet::cpp::Executor::device_type</a></div><div class="ttdeci">int device_type</div><div class="ttdef"><b>Definition:</b> executor.h:171</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_ac8da23a16e33e0e75a44f803cd3b7933"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#ac8da23a16e33e0e75a44f803cd3b7933">mxnet::cpp::Executor::outputs</a></div><div class="ttdeci">std::vector&lt; NDArray &gt; outputs</div><div class="ttdoc">arrays store the outputs of forward</div><div class="ttdef"><b>Definition:</b> executor.h:177</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_ae7d510ccf536b6f3858ef106bf88d215"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#ae7d510ccf536b6f3858ef106bf88d215">MXAutogradBackwardEx</a></div><div class="ttdeci">MXNET_DLL int MXAutogradBackwardEx(uint32_t num_output, NDArrayHandle *output_handles, NDArrayHandle *ograd_handles, uint32_t num_variables, NDArrayHandle *var_handles, int retain_graph, int create_graph, int is_train, NDArrayHandle **grad_handles, int **grad_stypes)</div><div class="ttdoc">compute the gradient of outputs w.r.t variabels</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Symbol_html_a00715c52f93164855a0390b5965a7f00"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Symbol.html#a00715c52f93164855a0390b5965a7f00">mxnet::cpp::Symbol::ListArguments</a></div><div class="ttdeci">std::vector&lt; std::string &gt; ListArguments() const</div><div class="ttdoc">List the arguments names.</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_ad6a26ffaabff769ee829221ef47e29e6"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#ad6a26ffaabff769ee829221ef47e29e6">mxnet::cpp::Executor::~Executor</a></div><div class="ttdeci">~Executor()</div><div class="ttdoc">destructor, free the handle</div><div class="ttdef"><b>Definition:</b> executor.h:164</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a6c6ef2d2f79c26fd0bad949243f7a37a"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a6c6ef2d2f79c26fd0bad949243f7a37a">mxnet::cpp::Executor::aux_dict</a></div><div class="ttdeci">std::map&lt; std::string, NDArray &gt; aux_dict()</div><div class="ttdef"><b>Definition:</b> executor.h:184</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a1fef41367238aaf8315fe5715a9f8f47"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a1fef41367238aaf8315fe5715a9f8f47">mxnet::cpp::Executor::Forward</a></div><div class="ttdeci">void Forward(bool is_train)</div><div class="ttdoc">Perform a Forward operation of Operator After this operation, user can get the result by using functi...</div><div class="ttdef"><b>Definition:</b> executor.h:62</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1NDArray_html"><div class="ttname"><a href="classmxnet_1_1cpp_1_1NDArray.html">mxnet::cpp::NDArray</a></div><div class="ttdoc">NDArray interface.</div><div class="ttdef"><b>Definition:</b> ndarray.h:122</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Context_html"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Context.html">mxnet::cpp::Context</a></div><div class="ttdoc">Context interface.</div><div class="ttdef"><b>Definition:</b> ndarray.h:45</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Symbol_html_a16ecc9398aed28206bfb189587a668c0"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Symbol.html#a16ecc9398aed28206bfb189587a668c0">mxnet::cpp::Symbol::ListAuxiliaryStates</a></div><div class="ttdeci">std::vector&lt; std::string &gt; ListAuxiliaryStates() const</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a42694f583467b2b517ea8f8c0250655b"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a42694f583467b2b517ea8f8c0250655b">mxnet::cpp::Executor::grad_arrays</a></div><div class="ttdeci">std::vector&lt; NDArray &gt; grad_arrays</div><div class="ttdef"><b>Definition:</b> executor.h:168</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a78c73fba32cdd68ac76389813158af1d"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a78c73fba32cdd68ac76389813158af1d">mxnet::cpp::Executor::Executor</a></div><div class="ttdeci">Executor(const CachedOpHandle &amp;h)</div><div class="ttdef"><b>Definition:</b> executor.h:55</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_aa4e594bc8b840f03c148aa84c472cb99"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#aa4e594bc8b840f03c148aa84c472cb99">mxnet::cpp::Executor::Reshape</a></div><div class="ttdeci">void Reshape()</div></div>
<div class="ttc" id="asymbol_8h_html"><div class="ttname"><a href="symbol_8h.html">symbol.h</a></div><div class="ttdoc">definition of symbol</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_a83a34d6df4290e5efd737293cf875a9c"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#a83a34d6df4290e5efd737293cf875a9c">MXFreeCachedOp</a></div><div class="ttdeci">MXNET_DLL int MXFreeCachedOp(CachedOpHandle handle)</div><div class="ttdoc">free cached operator</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a323bae1c2e05e9ab5437845a71d3c1b6"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a323bae1c2e05e9ab5437845a71d3c1b6">mxnet::cpp::Executor::combined_arrays</a></div><div class="ttdeci">std::vector&lt; NDArray &gt; combined_arrays</div><div class="ttdef"><b>Definition:</b> executor.h:170</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_aedb8d676502a66eef4a6c5988f73dccb"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#aedb8d676502a66eef4a6c5988f73dccb">MXNDArrayGetGrad</a></div><div class="ttdeci">MXNET_DLL int MXNDArrayGetGrad(NDArrayHandle handle, NDArrayHandle *out)</div><div class="ttdoc">return gradient buffer attached to this NDArray</div></div>
<div class="ttc" id="aclassmxnet_1_1NDArrayHandle_html"><div class="ttname"><a href="classmxnet_1_1NDArrayHandle.html">mxnet::NDArrayHandle</a></div><div class="ttdef"><b>Definition:</b> ndarray_handle.h:40</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html">mxnet::cpp::Executor</a></div><div class="ttdoc">Executor interface.</div><div class="ttdef"><b>Definition:</b> executor.h:45</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a942ef73436ecb2bcfde588e004037963"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a942ef73436ecb2bcfde588e004037963">mxnet::cpp::Executor::arg_dict</a></div><div class="ttdeci">std::map&lt; std::string, NDArray &gt; arg_dict()</div><div class="ttdef"><b>Definition:</b> executor.h:178</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_aa1d00c3df18b5c4db3824e7482afffdf"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#aa1d00c3df18b5c4db3824e7482afffdf">MXInvokeCachedOp</a></div><div class="ttdeci">MXNET_DLL int MXInvokeCachedOp(CachedOpHandle handle, int num_inputs, NDArrayHandle *inputs, int default_dev_type, int default_dev_id, int *num_outputs, NDArrayHandle **outputs, const int **out_stypes)</div><div class="ttdoc">invoke a cached op</div></div>
<div class="ttc" id="acpp-package_2include_2mxnet-cpp_2base_8h_html"><div class="ttname"><a href="cpp-package_2include_2mxnet-cpp_2base_8h.html">base.h</a></div><div class="ttdoc">base definitions for mxnetcpp</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a13d04b04cfafce126946be071549ace9"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a13d04b04cfafce126946be071549ace9">mxnet::cpp::Executor::arg_arrays</a></div><div class="ttdeci">std::vector&lt; NDArray &gt; arg_arrays</div><div class="ttdef"><b>Definition:</b> executor.h:167</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_abf83aa2e83d149a1b2c861bd33cb4d4e"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#abf83aa2e83d149a1b2c861bd33cb4d4e">mxnet::cpp::Executor::device_id</a></div><div class="ttdeci">int device_id</div><div class="ttdef"><b>Definition:</b> executor.h:172</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_a75939e5be09a150d4d8905c9fd6e986e"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#a75939e5be09a150d4d8905c9fd6e986e">MXAutogradSetIsRecording</a></div><div class="ttdeci">MXNET_DLL int MXAutogradSetIsRecording(int is_recording, int *prev)</div><div class="ttdoc">set whether to record operator for autograd</div></div>
<div class="ttc" id="ainclude_2mxnet_2c__api_8h_html_a3438cf44a22968b254a78032ca0c2c59"><div class="ttname"><a href="include_2mxnet_2c__api_8h.html#a3438cf44a22968b254a78032ca0c2c59">mx_uint</a></div><div class="ttdeci">uint32_t mx_uint</div><div class="ttdoc">manually define unsigned int</div><div class="ttdef"><b>Definition:</b> c_api.h:65</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a1aa4f05bce177a4f50a327c96c9894ce"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a1aa4f05bce177a4f50a327c96c9894ce">mxnet::cpp::Executor::require_grad</a></div><div class="ttdeci">bool require_grad</div><div class="ttdef"><b>Definition:</b> executor.h:173</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a11cc4c29bb7d5f859e9bbb4bc0df51ab"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a11cc4c29bb7d5f859e9bbb4bc0df51ab">mxnet::cpp::Executor::aux_arrays</a></div><div class="ttdeci">std::vector&lt; NDArray &gt; aux_arrays</div><div class="ttdef"><b>Definition:</b> executor.h:169</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Executor_html_a86cd99024edf91d7554f28c5e128dc7e"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Executor.html#a86cd99024edf91d7554f28c5e128dc7e">mxnet::cpp::Executor::Executor</a></div><div class="ttdeci">Executor(const Symbol &amp;symbol, Context context, const std::vector&lt; NDArray &gt; &amp;arg_arrays, const std::vector&lt; NDArray &gt; &amp;grad_arrays, const std::vector&lt; OpReqType &gt; &amp;grad_reqs, const std::vector&lt; NDArray &gt; &amp;aux_arrays, const std::map&lt; std::string, Context &gt; &amp;group_to_ctx=std::map&lt; std::string, Context &gt;(), Executor *shared_exec=nullptr)</div></div>
<div class="ttc" id="aclassmxnet_1_1cpp_1_1Symbol_html"><div class="ttname"><a href="classmxnet_1_1cpp_1_1Symbol.html">mxnet::cpp::Symbol</a></div><div class="ttdoc">Symbol interface.</div><div class="ttdef"><b>Definition:</b> symbol.h:73</div></div>
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